JP7039751B2 - Vibration actuators and electronic devices - Google Patents

Description

The present invention relates to a vibration actuator and an electronic device including the vibration actuator.

Conventionally, a vibration actuator has been mounted as a vibration source in an electronic device having a vibration function. The electronic device can notify the incoming call and improve the operation feeling and the presence feeling by driving the vibration actuator to transmit the vibration to the user and letting the user experience it. Here, the electronic device is a portable game terminal, a controller (game pad) of a stationary game machine, a mobile communication terminal such as a mobile phone or a smartphone, a mobile information terminal such as a tablet PC, or a wearable attached to clothes or an arm. Includes portable devices that can be carried by terminals.

As a vibration actuator having a structure that can be miniaturized and mounted on a mobile device, for example, as shown in Patent Document 1, a vibration actuator used for a pager or the like is known.

In this vibration actuator, a pair of plate-shaped elastic bodies are supported by the opening edges of a cylindrical frame body so as to face each other. In addition, this vibrating actuator fixes a yoke with a magnet attached to the raised central part of one of the pair of plate-shaped elastic bodies in a spiral-shaped plate-shaped elastic body, and supports the yoke inside the frame. is doing.

The yoke constitutes a magnetic field generator together with a magnet, and the coil is arranged in the magnetic field of the magnetic field generator in a state of being attached to the other plate-shaped elastic body. The coil is formed into a cylindrical body using an enamel wire obtained by baking a resin on the surface of a copper wire, and is a so-called air-core coil using a self-bonding wire, and the arrangement space is small. When currents with different frequencies are switched and applied to this coil through an oscillation circuit, the pair of plate-shaped elastic bodies are selectively resonated to generate vibration, and the yoke vibrates in the frame body in the direction of the center line of the frame body. ..

In this vibration actuator, the distance between the magnet and the coil and the distance between the yoke and the coil are larger than the distance between the yoke and the inner peripheral wall of the frame. As a result, when an impact is received from the outside, the yoke first collides with the inner peripheral wall of the frame body, so that the yoke and the magnet do not come into contact with the coil, and the coil is prevented from being damaged.

However, in reality, since the yoke having the magnet collides with the frame body, the pair of plate-shaped elastic bodies elastically supporting the movable body having the yoke may be damaged by the impact.

Therefore, in Patent Document 1, as a second embodiment, by providing a shaft on the fixed body in which the movable body slides and moves in the vibration direction, the yoke that is a movable body even when subjected to an external impact is provided. Also disclosed is a configuration in which the shaft does not move to the inner peripheral surface of the frame body and prevents collision with the frame body.

Japanese Patent No. 3748637

However, in the conventional vibration actuator configuration in which the shaft on which the movable body slides is provided on the fixed body, the movement of the movable body can be regulated by the shaft to improve the impact resistance, but the shaft is moved when the movable body is driven. There is a risk of sliding and making a sliding noise.

There is a problem that the generation of noise due to contact, such as vibration noise, reduces the vibration expressive power of the vibration actuator itself. For this reason, the vibration actuator that vibrates as a vibrating body by driving a movable body has high vibration expressive power without including vibration noise as much as possible, and can output suitable perceived vibration that can be fully experienced by the user. It is desired. Further, it is desirable that the cost is lower than that of the conventional one using an air-core coil.

The present invention has been made in view of this point, and provides a vibration actuator and an electronic device which can realize miniaturization at low cost, have impact resistance, and generate suitable perceived vibration at high output. With the goal.

One aspect of the vibration actuator of the present invention is
A vibrating actuator with a movable body that has magnetic cores laminated on the front and back surfaces of a disk-shaped magnet and is supported by a pair of spiral springs to vibrate.
An annular protective wall portion arranged on the outer circumference of the movable body, and
An annular coil arranged on the outer periphery of the protective wall portion and
An annular magnetic shield portion arranged on the outer circumference of the annular coil,
It has a movable body, a protective wall portion, a coil, and a resin case for accommodating the magnetic shield portion.
The protective wall portion has a flange portion that protrudes from the outer periphery of the protective wall portion and is fixed to the resin case.
The flange portion is configured to have a protruding side portion at an end portion that is fitted into a positioning groove of the pair of spiral springs to restrict radial and circumferential movement of the pair of spiral springs .

One aspect of the electronic device of the present invention is
A configuration in which the vibration actuator having the above configuration is mounted is adopted.

According to the present invention, it is possible to realize miniaturization at low cost, have impact resistance, and generate suitable perceived vibration at high output.

It is an external perspective view which shows the vibration actuator which concerns on one Embodiment of this invention. It is a vertical sectional view of the vibration actuator. It is a perspective view which shows the state which the case is removed in the vibration actuator. It is a perspective view which shows the movable body which the elastic support part is fixed. It is an exploded perspective view of a movable body and an elastic support part. It is a top view of the elastic support part provided with the damping part. It is a partial cross-sectional view of the elastic support part provided with the damping part. It is a figure which shows the coil assembly which removed the electromagnetic shield part. It is an exploded view of a coil assembly. It is the bottom side perspective view of the case body. It is the figure which looked at the lid part from the back side. It is a figure which shows typically the magnetic circuit composition of the vibration actuator. It is a figure which shows the relative movement state of a coil and a magnet. It is a figure which shows the relative movement state of a coil and a magnet. It is a perspective view which shows the coil bobbin part which has a terminal entanglement part. It is a side view which looked at the coil bobbin part from the terminal entwining part side. 16 is a cross-sectional view taken along the line AA of FIG. It is an enlarged view of the X part of FIG. It is an exploded perspective view which shows the relationship between the coil assembly and a case which are used for the description of the winding drawing part which has a terminal entanglement part. It is sectional drawing which shows the contact part of a coil bobbin and an electromagnetic shield part in a coil assembly. It is a top view of the coil assembly shown in FIG. It is a perspective view which looked at the coil assembly shown in FIG. 3 from the terminal entwining part side. It is a side view which looked at the coil assembly shown in FIG. 3 from the terminal entwining part side. It is a perspective view which shows the modification of the coil assembly. It is a side view which shows the modification of the coil assembly. It is an external perspective view of the vibration actuator which concerns on one Embodiment of this invention as seen from the notch side. It is an external perspective view of the vibration actuator in the state where the cable is connected to the terminal entanglement part. FIG. 27 is an enlarged view of a connection portion between a terminal entwined portion and a cable shown in FIG. 27. It is sectional drawing of the case protrusion part. It is sectional drawing which shows the modification of the case protrusion. It is a figure which shows the cable end part. It is a figure which shows the deformation example of a cable end part. It is a figure which shows the modification of the modification of the connection part between a terminal entwining part and a cable of FIG. It is a vertical sectional view which shows the assembly process of a vibration actuator. It is a figure which shows an example of the electronic device which mounted the vibration actuator. It is a figure which shows an example of the electronic device which mounted the vibration actuator.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Overall configuration of vibration actuator]
FIG. 1 is an external perspective view showing a vibration actuator according to an embodiment of the present invention, FIG. 2 is a vertical sectional view of the vibration actuator, and FIG. 3 is a state in which the case is removed from the vibration actuator. It is a perspective view which shows. Further, FIG. 4 is a perspective view showing a movable body to which the elastic support portion is fixed, and FIG. 5 is an exploded perspective view of the movable body and the elastic support portion. FIG. 6 is a plan view of the elastic support portion provided with the damping portion, and FIG. 7 is a partial cross-sectional view of the elastic support portion provided with the damping portion. Further, FIG. 8 is a diagram showing a coil assembly from which the electromagnetic shield portion is removed, and FIG. 9 is an exploded view of the coil assembly. The "upper" side and "lower" side in the present embodiment are provided for convenience of understanding, and mean one or the other of the vibration direction of the movable body in the vibration actuator. That is, when the vibration actuator is mounted on an electronic device (see FIGS. 35 and 36), it may be upside down or left and right.

The vibration actuator 1 according to the first embodiment is mounted as a vibration source in an electronic device such as a portable game terminal device (for example, the game controller GC shown in FIG. 35), and realizes the vibration function of the electronic device. The electronic device also includes a mobile device such as a smartphone (for example, the mobile terminal M shown in FIG. 36). The vibration actuator 1 is mounted on a portable game terminal device or a device such as a mobile device, and vibrates when driven to notify the user of an incoming call or give a feeling of operation or presence.

In the vibration actuator 1 of the present embodiment, as shown in FIGS. 1 and 2, a movable body 20 is placed in a hollow case 10 between upper and lower end surfaces with the axial direction (vertical direction) of the case 10 as the vibration direction. It is housed so that it can vibrate. By moving the movable body 20 inside the case 10, the vibration actuator 1 itself functions as a vibrating body.

The vibration actuator 1 has a plate shape that reciprocally supports the movable body 20 having the magnet 30 and the movable body cores 41 and 42, the fixed body 50 having the coils 61 and 62, and the movable body 20 with respect to the fixed body 50. Has elastic support portions 81, 82 and.

In the vibration actuator 1, the coils 61, 62, the magnet 30, and the movable body cores 41, 42 form a magnetic circuit that vibrates the movable body 20. In the vibration actuator 1, the coils 61 and 62 are energized from the power supply unit (for example, the drive control unit 203 shown in FIGS. 35 and 36), so that the coils 61 and 62 and the magnet 30 cooperate with each other to form a case. Within 10, the movable body 20 reciprocates in the vibration direction.

In the vibration actuator 1 of the present embodiment, the movable body 20 is a bobbin main body portion (coil protection wall portion) 522 arranged between the movable body 20 and the inside of the coils 61 and 62 held by the coil bobbin portion 52. As a result, the coils 61 and 62 reciprocate in the axial direction, that is, in the vibration direction. The axial direction of the coils 61 and 62 is the vibration direction of the movable body 20, the magnetizing direction of the magnet 30, and the axial direction of the coil bobbin portion 52.

When the movable body 20 is not moving and is not vibrating, the center of the length in the vibration direction is the center of the length of the coil bobbin portion 52 in the vibration direction via the elastic support portions 81 and 82, and the movable body 20 of the movable body 20. They are arranged so as to face each other at a predetermined interval in a direction orthogonal to the axial direction. At this time, it is desirable that the movable body 20 is positioned at a position balanced with the coils 61 and 62 so as not to come into contact with the bobbin main body portion 522 of the coil bobbin portion 52. In the present embodiment, the center of the vibration direction length of the magnet 30 and the movable body cores 41 and 42 is the direction orthogonal to the vibration direction with the center of the vibration direction length between the coils 61 and 62 separated vertically. It is preferable that they are arranged at opposite positions. A magnetic fluid may be interposed between the bobbin main body 522 and the movable body 20.

In the present embodiment, as shown in FIG. 3, the vibration actuator 1 has the coils 61, 62, the coil bobbin portion 52, the movable body 20, and the elastic support portion 81 in the case 10 having the case body 11 and the lid portion 12. It is configured by providing the drive unit 13 having 82.

<Movable body 20>
The movable body 20 can reciprocate along the inner peripheral surface 522a of the bobbin main body 522 by the elastic support portions 81 and 82 connected at the upper and lower ends inside the tubular coil bobbin portion 52 of the fixed body 50. Supported by. In other words, the movable body 20 is supported in the vibration actuator 1 so as to be reciprocally movable in the direction in which the lid portion 12 and the bottom portion 114 face each other. The movable body 20 is provided in the drive unit 13 shown in FIG.

As shown in FIGS. 2, 4 and 5, the movable body 20 has a magnet 30, movable body cores 41 and 42, spring stoppers 22, 24, and fixing pins 26 and 28. In the present embodiment, the movable body cores 41 and 42 and the spring stoppers 22 and 24 are connected in series with the magnet 30 as the center toward both sides in the vibration direction (vertical direction in the figure), respectively. In the movable body 20, the outer peripheral surfaces 20a of the magnet 30 and the movable body cores 41 and 42 face each other with a predetermined interval inside the inner peripheral surface 522a of the bobbin main body portion 522.

When the movable body 20 moves in the vibration direction, the outer peripheral surface 20a reciprocates without contacting along the inner peripheral surface 522a.

The magnet 30 is magnetized in the vibration direction. In the present embodiment, the magnet 30 is formed in a disk shape, and the front and back surfaces 30a and 30b separated in the vibration direction have different polarities. The front and back surfaces 30a and 30b of the magnet 30 are two magnetized surfaces that are separated from each other in the extending direction of the axes of the coils 61 and 62.

The magnets 30 are arranged so as to be spaced apart from each other in the radial direction of the coils 61 and 62 with respect to the coils 61 and 62 (details will be described later). Here, the "diameter direction" is a direction orthogonal to the axes of the coils 61 and 62, and is also a direction orthogonal to the vibration direction. The "distance" in the radial direction is the distance between the coils 61 and 62 including the bobbin main body 522 and the magnet 30, and is a distance that allows the movable body 20 to move in the vibration direction without contacting each other. That is, in the present embodiment, the “spacing” means a predetermined spacing between the bobbin main body 522 and the magnet 30.

In the present embodiment, the magnet 30 is arranged so as to face the center of the bobbin main body 522 on the outer side in the radial direction. If the magnet 30 is arranged inside the coils 61 and 62 with the two magnetized surfaces facing in the extending direction of the axes of the coils 61 and 62, it may have a tubular shape, a plate shape, or the like. It may have a shape other than a disk shape. Further, it is desirable that the axial center of the magnet 30 coincides with the axial center of the movable body 20.

Movable body cores 41 and 42 are provided on the front and back surfaces 30a and 30b of the magnet 30, respectively.

The movable body cores 41 and 42 are magnetic materials, function as yokes, and both the magnet 30 and the coils 61 and 62 form a magnetic circuit. The movable body cores 41 and 42 concentrate the magnetic flux of the magnet 30 and allow it to flow efficiently without leaking, and effectively distribute the magnetic flux flowing between the magnet 30 and the coils 61 and 62.

Further, the movable body cores 41 and 42 have a function as a part of the magnetic circuit, a function as a main body portion of the movable body 20 in the movable body 20, a function of fixing the spring fixing portions 22 and 24, and a weight. Has the function as.

In the present embodiment, the movable body cores 41 and 42 are formed in the shape of an annular flat plate having the same surface shape as the magnet 30. The movable body cores 41 and 42 are fixed to the magnet 30 so that the outer peripheral surface is flush with the outer peripheral surface of the magnet, and together with the outer peripheral surface of the magnet, form the outer peripheral surface 20a of the movable body 20.

The movable body cores 41 and 42 are the same members similarly formed in the present embodiment, and in the present embodiment, the movable body cores 41 and 42 are provided symmetrically above and below the magnet 30 so as to sandwich the magnet 30 around the magnet 30. There is. The movable cores 41 and 42 are attracted to the magnet 30 and fixed to the magnet 30 with, for example, a thermosetting adhesive such as an epoxy resin or an anaerobic adhesive.

At the center of each of the movable body cores 41 and 42, fitting ports 411 and 421 into which the upper and lower spring fixing portions 22 and 24 are fitted are provided. The fitting ports 411 and 421 are provided so that the axes of the upper and lower spring fixing portions 22 and 24, that is, the central axes of the elastic support portions 81 and 82 are located on the central axis of the movable body 20. The fitting ports 411 and 421 are in contact with each other at three or four points in order to accurately fix the inserted spring stoppers 22 and 24 on the shaft thereof, and the upper and lower spring stoppers 22 and 24 are brought into contact with each other on the shaft of the movable body 20. It supports to be located on top. The fitting ports 411 and 421 can adjust the degree of opening in the movable body cores 41 and 42 to adjust the weight of the movable body 20 and set a suitable vibration output.

In the present embodiment, the movable body cores 41 and 42 are coiled inside the coils 61 and 62 (inward in the radial direction) and in a direction orthogonal to the axial direction of the coils 61 and 62 when the movable body 20 is not vibrating. It is located so as to face each of 61 and 62.

The movable body cores 41 and 42 together with the magnet 30 form a movable body side magnetic circuit. In the present embodiment, it is preferable that the height position of the upper surface of the movable body core 41 on the upper side of the magnet 30 faces the center position in the height direction (vertical direction) of the coil 61 on the upper side. In addition, it is preferable that the height position of the lower surface of the movable body core 42 on the lower side of the magnet 30 faces the center position in the height direction (vertical direction) of the lower coil 62.

The spring stop portions 22 and 24 have a function of fixing the movable body side magnetic circuit to the elastic support portions 81 and 82 and also have a function of a weight of the movable body 20. The spring stoppers 22 and 24 are provided on the target so as to sandwich the magnet 30 and the movable body cores 41 and 42, and increase the vibration output of the movable body 20.

In the present embodiment, the spring stoppers 22 and 24 are axial bodies arranged along the central axis of the movable body 20, and are between the movable body cores 41 and 42 and the elastic support portions 81 and 82. It will be installed.

In the present embodiment, the spring stopper portions 22 and 24 are formed in the same shape and have a joint portion 222 and 242 and a spring fixing portion 224 and 244. The joint portions 222 and 242 and the spring fixing portions 224 and 244 are connected in series in the vibration direction (specifically, the vertical direction), respectively.

The spring stoppers 22 and 24 have through holes to penetrate. The spring stoppers 22 and 24 may function as weight adjusting portions by adding a weight in the through hole. By adding a weight in the through hole, the movable body 20 can be made heavy and the vibration output of the movable body 20 can be increased.

The joint portions 222 and 242 are joined to the movable body cores 41 and 42, respectively. Specifically, the joint portions 222 and 242 are internally fitted by inserting one end portion into the fitting ports 411 and 421 of the movable body cores 41 and 42, respectively. In the present embodiment, the spring stoppers 22 and 24 are fixed to the movable cores 41 and 42 by press fitting, but the present invention is not limited to this, and for example, a thermosetting adhesive such as an epoxy resin or an anaerobic adhesive is used. It may be fixed by adhesion using.

The upper spring fixing portion 224 constitutes one end of the movable body 20 in the vibration direction, that is, the upper end of the movable body 20, and is the end on the inner diameter side of the upper leaf spring which is the elastic support portion 81. It is joined to a certain inner peripheral portion 802. On the other hand, the lower spring fixing portion 244 constitutes the other end portion of the movable body 20 in the vibration direction, that is, the lower end portion of the movable body 20, and is the inner diameter side of the lower leaf spring which is the elastic support portion 82. It is joined to the inner peripheral portion 802 which is the end portion of the.

The spring fixing portions 224 and 244 are provided so as to project vertically from the joint portions 222 and 242, respectively, and at their tips thereof, the spring fixing portions 224 and 244 are attached to the inner peripheral portions 802 and 802 of the elastic support portions 81 and 82 via the fixing pins 26 and 28. Each is joined.

The fixing pins 26 and 28 firmly fix the elastic support portions 81 and 82 and the movable body 20 so as not to come off due to the vibration of the movable body 20.

The fixing pins 26 and 28 are formed in the same shape in the present embodiment, and are the axial pin bodies 262 and 282 that can be press-fitted into the spring fixing portions 224 and 244, respectively, and one end side of the pin bodies 262 and 282, respectively. It has flanges 264 and 284 provided at the edges of the.

Specifically, the pin bodies 262 and 282 of the fixing pins 26 and 28 have the inner peripheral portions 802 of the elastic support portions 81 and 82 overlapped with the spring fixing portions 224 and 244. It is fixed by press-fitting it into the through hole of the spring fixing portion 224 and 244 through the opening of 802. As a result, the flanges 264 and 284 are firmly joined by sandwiching the inner peripheral portions 802 of the elastic support portions 81 and 82 with the spring fixing portions 224 and 244. Even if the inner peripheral portions 802 of the elastic support portions 81 and 82 and the spring fixing portions 224 and 244 are joined by welding, adhesion, caulking, etc., and further by welding, adhesion, or caulking in combination. good.

Since the spring stoppers 22 and 24 are arranged at both ends (upper and lower end portions) of the movable body 20 which are separated from each other in the vibration direction with respect to the movable body side magnetic circuit, the weight in the movable body 20 is magnetized by the movable body. It is not located on the outer peripheral side of the circuit. This does not limit the placement space of the coils 61 and 62 located opposite each other on the outer peripheral side of the movable body side magnetic circuit, that is, on the outer peripheral side of the movable body 20, that is, the movable body magnetic circuit and the coils 61 and 62. The efficiency of the electromagnetic conversion does not decrease because the distance from the electromagnetic conversion is not increased. Therefore, the weight of the movable body 20 can be suitably increased, and a high vibration output can be realized.

Further, since the spring stoppers 22 and 24 have a weight function and a spring fixing function, it is not necessary to individually assemble the members having the respective functions. By simply providing the spring stoppers 22 and 24 in the magnetic circuit on the movable body side, the upper leaf spring and the lower leaf spring, which are the elastic support portions 81 and 82, can be easily assembled to the movable body 20 together with the weight, and the assembly is assembled. Can be enhanced.

The spring stoppers 22 and 24 may be made of a magnetic material, but are preferably made of a non-magnetic material. If the spring stoppers 22 and 24 are made of a non-magnetic material, the magnetic flux from the movable body core 41 does not flow upward and the magnetic flux from the movable body core 42 does not flow downward, so that the movable body core is efficiently used. It can flow to the coils 61 and 62 located on the outer peripheral side of the 41 and 42.

Further, the spring stopper portions 22 and 24 are formed of a material having a higher specific gravity (for example, a specific gravity of about 16 to 19) than a material such as a silicon steel plate (the specific gravity of the steel plate is 7.70 to 7.98). preferable. For example, tungsten can be applied to the materials of the spring stoppers 22 and 24. As a result, even when the external dimensions of the movable body 20 are set in the design or the like, the mass of the movable body 20 can be increased relatively easily, and a desired vibration output that is a sufficient perceived vibration for the user is realized. be able to.

<Fixed body 50>
The fixed body 50 holds the coils 61 and 62, and inside the coils 61 and 62 in the radial direction, the movable body 20 is vibrated in the vibration direction (coil axial direction, axis of the movable body 20) via the elastic support portions 81 and 82. Supports freely in the direction).

The fixed body 50 has a case 10, coils 61 and 62, a coil bobbin portion 52, and an electromagnetic shield portion 58.

The coil bobbin portion 52 holds the coils 61 and 62 wound around the outer peripheral surface, surrounds the magnet 30 with the inner peripheral surface 522a, and guides the movement of the movable body 20 having the magnet 30.

The coil bobbin portion 52 is a tubular body formed of a resin such as phenol resin and polybutylene terephthalate (PBT). In the present embodiment, the coil bobbin portion 52 is made of a material containing a phenol resin such as bakelite having high flame retardancy.

Since the coil bobbin portion 52 is made of a material containing phenol resin, flame retardancy is enhanced, and even if heat is generated by Joule heat when a current flows through the coils 61 and 62 to be held, safety during driving is achieved. Can be improved. Further, since the dimensional accuracy is improved and the position accuracy of the coils 61 and 62 is improved, the variation in vibration characteristics can be reduced.

The coil bobbin portion 52 includes a cylindrical bobbin main body portion 522, flange portions 526 to 528 protruding in the radial direction from the outer periphery of the bobbin main body portion 522, a terminal entwining portion (coil connection portion) 53, and a movable range forming portion 54. And has a connecting groove 55.

In the coil bobbin portion 52, the coils 61 and 62 are wound between the flange portions 526 and 528 (coil mounting portions 52b and 52c). The coils 61 and 62 are covered with an electromagnetic shield portion 58 that is positioned via the terminal extraction portion 90 of the coil bobbin portion 52 and the positioning engagement portion 529. The terminal entwining portion (coil connection portion) 53 may be illustrated and described as a terminal entwining portion (coil connection portion) 53-1 and 53-2 for convenience.

The inner peripheral surface 522a of the bobbin main body 522 is arranged so as to face the outer peripheral surface of the movable body 20 at a predetermined distance. This predetermined interval is an interval at which the movable body 20 can move in the axial direction, which is the vibration direction, without contacting the inner peripheral surface 522a when the movable body 20 moves in the vibration direction. The bobbin main body 522 is configured to hinder the contact between the magnet 30 and the coils 61 and 62, and the movable body 20 can reciprocate without contacting along the inner peripheral surface 522a.

The bobbin main body 522 functions as a protective wall portion for protecting the collision with the coils 61 and 62 when the movable body 20 arranged inside is driven. The thickness of the bobbin main body portion 522 is such that the strength does not affect the coils 61 and 62 on the outer peripheral side even if the moving movable body 20 comes into contact with the bobbin main body portion 522.

On the outer peripheral side of the bobbin main body 522, coils 61 and 62 are provided in the coil axial direction so as to surround the outer peripheral surfaces of the movable body cores 41 and 42 of the movable body 20 (the outer peripheral surfaces of the magnet 30 and the movable body cores 41 and 42). They are arranged side by side.

Specifically, on the outer peripheral surface of the bobbin main body 522, concave coil mounting portions 52b and 52c (see FIGS. 2 and 9) that open radially outward on the outer peripheral side are provided together with the flange portions 526 to 528. ing.

The coil mounting portions 52b and 52c are provided so as to be partitioned by flange portions 526 to 528. In the coil mounting portions 52b and 52c, the coils 61 and 62 sandwich the flange portion (center wall portion, hereinafter also referred to as "central flange portion") 526 between the flange portions 527 and 528 in the vibration direction. It is being wound.

The central flange portion 526 is provided in an annular shape and has a circular outer peripheral portion.
A routing portion 9 having a function of routing the winding of the coil and processing the terminal state of the coil is provided in a part of the outer peripheral portion of the central flange portion 526.
The routing portion 9 includes a terminal lead-out portion 90 provided with a terminal entwining portion 53, and a connecting groove portion 55 to which the winding of the coil connecting the coils 61 and 62 is wired.

As shown in FIGS. 8, 9, 15 and 16, the terminal entwining portion 53 entangles the windings of the coils of the coils 61 and 62 and functions as a connector connection portion for connecting to an external device. The terminal entwining portion 53 connects the coils 61 and 62 to an external device (for example, a power supply unit such as a drive control unit), and power is supplied to the coils 61 and 62.

The terminal entwining portion 53 is a conductive member projecting from the outer peripheral portion of the bobbin main body portion 522, and is a rod-shaped body in the present embodiment. In the present embodiment, the terminal entwining portion 53 is press-fitted into the outer peripheral portion of the coil bobbin portion 52, specifically, the outer peripheral surface of the central flange portion 526 arranged at the center in the vibration direction. Is provided by.

The terminal entwining portion 53 is provided in the terminal drawing portion 90 protruding from the outer peripheral surface of the flange portion 526 at the center in the vibration direction in the vibration actuator 1.
The terminal drawing portion 90 pulls out the end of the winding of the coil forming the coils 61 and 62 to the outside of the vibration actuator 1 via the terminal entwining portion 53.

The terminal lead-out portion 90 has a predetermined length in the radial direction, a thickness in the vibration direction, and a width in the circumferential direction in the flange portion 526 by projecting from the outer peripheral surface of the central flange portion 526, and the terminal entwined portion 90. 53 press-fitting whites are secured. As a result, the terminal lead-out portion 90 can firmly hold the terminal entanglement portion 53, and can be stably fixed when the terminal entanglement portion 53 is assembled to the coil bobbin portion 52.

In the present embodiment, as shown in FIG. 17, the terminal lead-out portion 90 projects outward from the outer diameter R of the central flange portion 526. A terminal entwining portion 53 is projected outward from this outwardly projecting portion.
Along with the terminal lead-out portion 90, the terminal entwining portion 53 projects outward from the outer diameter R. As a result, it is possible to prevent the terminal entwining portion 53 from coming into contact with the electromagnetic shield portion 58 arranged so as to surround the coil bobbin portion 52 after assembly. The details of the electromagnetic shield portion 58 will be described later. Further, in the present embodiment, the terminal extraction portion 90 fits into the opening portion 582 of the electromagnetic shield portion 58. As a result, the terminal lead-out portion 90 functions as a rotation stopper for the electromagnetic shield portion 58.

The terminal lead-out portion 90 is provided in the central flange portion 526 in close proximity (adjacent to this case) to the connecting groove portion 55.

The winding of the coil connecting the coils 61 and 62 is inserted into the connecting groove portion 55. In the connecting groove portion 55 of the present embodiment, the winding direction of the winding of the coil 61 and the coil forming the coil 62 is reversed so as to be opposite in the vertical direction above and below the connecting groove portion 55.

The connecting groove portion 55 is formed in a notch shape that opens outward in the radial direction at the outer peripheral portion of the central flange portion 526 and penetrates in the vibration direction. Specifically, the connecting groove portion 55 has at least a bottom wall portion 55a forming a groove-shaped bottom and a side wall portion (one side wall portion) 55b far from the terminal entwining portion 53 in the bottom wall portion 55a. It has a portion formed in a notch shape by the bottom wall portion 55a and the distant side wall portion 55b. In the notch portion, after winding one of the coils 61 or 62 and arranging it, the winding is wound so that the winding does not come off when the other is wound and arranged by reversing the winding direction. It has a locking function. The connecting groove portion 55 of the present embodiment is formed in a U-shape in a plan view in which both side wall portions are erected at both ends separated in the circumferential direction with the bottom wall portion 55 as the bottom surface.

In the connecting groove portion 55, as shown in FIG. 17, the side wall portion 55b far from the terminal entwining portion 53 is outside the central flange portion 526 passing through the joint portion between the far side wall portion 55b and the bottom wall portion 55a in a plan view. It is formed so as to be positioned at an acute angle on the terminal entanglement portion 53 side with respect to the normal line n on the outer peripheral surface of the diameter R. As a result, in the connecting groove portion 55, the angle α formed by the side wall portion 55b far from the terminal entwining portion 53 and the bottom wall portion 55a is provided so as to form an acute angle on the terminal entwining portion 53 side with respect to the normal line n. ing.

Therefore, when the coil winding is wound around the coil mounting portions 52b and 52c in the upside-down direction to arrange the coils 61 and 62, the coil winding is surely placed in the connecting groove portion 55 so as not to come off from the connecting groove portion 55. It is engaged and suitably guided to the desired coil mounting portions 52b, 52c. Therefore, the coils 61 and 62 can be easily assembled to the coil bobbin portion 52.

Further, in the central flange portion 526, the routing portion 9 connects the coil winding from the terminal entwining portion 53 to the coil winding portion of the coil bobbin portion 52 (one of the coil mounting portions 52b and 52c) at the position of the first winding (for example). It has a coil guide portion 92 that guides the corner portion).

The coil guide portion 92 is provided on at least one surface of the upper and lower surfaces (surfaces separated in the vibration direction) of the central flange portion 526. In the present embodiment, the coil guide portion 92 is formed in the central flange portion 526 at a portion adjacent to the terminal extraction portion 90 and the connecting groove portion 55 on both sides in the circumferential direction.

The coil guide portion 92 has an inclined portion 93 formed by a step on the upper and lower surfaces of the central flange portion 526, thereby forming a joint portion between the central flange portion 526 and the outer peripheral surface of the bobbin main body portion 522 in the coil mounting portions 52b and 52c. Communicate with the terminal entwining portion 53.

FIG. 18 shows a coil guide portion 92-1 that guides between the coil mounting portion 52c and the terminal entwining portion 53-1 in the coil mounting portion 52c among the coil guide portions 92. The step Y is the height level of the central flange portion 526 (height level of the upper surface of the central flange portion 526), which is substantially the same height as the joint position with the outer peripheral surface of the coil main body portion 522 in the coil mounting portion 52c. It is a step lower than this and is a step from the height level position close to the terminal entanglement portion 53.

The inclined portion 93 has a stepped surface between the upper surface of the central flange portion 526 and the surface at the height level position close to the terminal entwining portion 53 due to the step Y. This stepped surface is arranged so as to rise from the surface at the height level close to the terminal entwining portion 53, and extends in the circumferential direction from the base end side of the terminal entwining portion 53, while the coil mounting portions 52b, 52c. Tilt toward the bottom side of.

In FIG. 18, for example, the coil guide portion 92-1 entangles the coil winding with the terminal entwining portion 53-1 and then uses the inclined portion 93 to entangle the coil winding with the coil mounting portion 52c of the coil bobbin portion 52. Guide them to pull in to the side. As a result, the coil 62 can be suitably arranged by stabilizing the position of the winding of the first winding as compared with the case where the coil is directly pulled from the terminal entwining portion 53-1 to the coil mounting portion 52c.

The coil guide portion 93 stabilizes the position of the first winding in the coil mounting portions 52b, 52c when winding the winding of the coil from the terminal entwining portion 53 around the coil mounting portions 52b, 52c. It is possible to suppress defects in the process.

As a result, the vibration actuator 1 can be assembled by performing each process of entwining the winding around the terminal entwining portion 53, forming the upper and lower coils, and entwining the final terminal entwining portion 53 in a series of steps. can. As a result, the coil forming process and the like can be easily automated, and a vibration actuator having an efficient assembly structure can be realized.

The flange portions 527 and 528 are provided at both ends of the bobbin main body portion 522 separated in the axial direction (in the present embodiment, the vibration direction and also the vertical direction), and form the upper and lower end portions of the coil bobbin portion 52. The flange portions 527 and 528 (collectively referred to as "end flange portions" and each of them are also referred to as "end flange portions") are provided so as to project from the outer periphery of the bobbin main body portion 522 to both ends in the vibration direction in the radial direction. There is. As shown in FIGS. 16 and 20, the flange portions 527 and 528 at both ends have portions 527b and 528b having the same diameter as the outer peripheral portion 526a of the central flange portion 526, and the inner peripheral surface of the electromagnetic shield portion 58 at these same diameter portions. Contact with.

In the coil bobbin portion 52, the outer peripheral portion 526a of the central flange portion 526 and the same diameter portions 527b and 528b of the flange portions 527 and 528 are opened in the radial direction to form a concave portion into which the electromagnetic shield portion 58 is fitted. .. By arranging the electromagnetic shield portion 58 in the concave portion, the electromagnetic shield portion 58 is positioned at a position surrounding the coils 61 and 62. Further, the electromagnetic shield portion 58 is stably fixed to the coil bobbin portion 52 by abutting the outer peripheral portion 526a and the same diameter portions 527b and 528b of the flange portions 527 and 528, and the height dimension of the electromagnetic shield portion 58 ( Even when the length in the vibration direction) becomes large, it can be stably fixed.

The flange portions 527 and 528 are end portions on the direction side away from the flange portion 526 (upper and lower end portions in the present embodiment), and elastic support portions 81 and 82 are fixed.

The movable range forming portion 54 is provided at the upper and lower ends of the coil bobbin portion 52, and when the coil bobbin portion 52 is housed in the case 10, vibration between the lid portion 12 and the bottom portion 114 of the case 10 and the movable body 20 is provided. Form a range.

The movable range forming portion 54 is a protruding side portion protruding in the vibration direction (vertical direction) from each of the flange portions 527 and 528. The movable range forming portion 54 is provided at predetermined intervals in the upper and lower annular opening end faces (also referred to as “upper end surface and lower end surface”, respectively) 527a and 528a of the flange portions 527 and 528. The upper end surface 527a means the opening end surface on one side, and the lower end surface 528a means the opening end surface on the other side.

The flange portion 527 has a protrusion-shaped movable range forming portion 54 projecting in the vibration direction, and has a top surface receiving portion that receives the lid portion 12 via the movable range forming portion 54. The flange portion 528 has a protrusion-shaped movable range forming portion 54 projecting in the vibration direction, and has a bottom receiving portion that receives the bottom portion 114 via the movable range forming portion 54.

Further, as shown in FIG. 21, the movable range forming portion 54 is fitted into the positioning groove 808 provided in the elastic support portions 81 and 82 to perform radial positioning of the elastic support portions 81 and 82. The movable range forming portion 54 has a length in the circumferential direction and a predetermined thickness, and a positioning groove 808 is also formed corresponding to this. In the present embodiment, the movable range forming portion 54 is fitted in the positioning groove 808 to regulate the radial and circumferential movements of the elastic support portions 81 and 82, and the elastic support portions 81 and 82 are positioned. It is carried out.

In order to position the elastic support portions 81 and 82 with respect to the coil bobbin portion 52 by fitting the protrusion-shaped movable range forming portion 54 into the positioning groove 808, the elastic support portions 81 and 82 of each individual of the drive unit 13 are positioned. The positions can be set uniformly so that the elastic support portions 81 and 82 can be stably positioned with respect to the coil bobbin portion 52. As a result, the elastic support portions 81 and 82 are restricted from moving in the rotational direction, and as a product, the variation of the elastic support portions 81 and 82 can be suppressed and stable characteristics can be realized.

Further, the movable range forming portion 54 is provided at equal intervals around the axis of the coil bobbin portion 52. In the present embodiment, the movable range forming portions 54 are provided at three locations at equal intervals around the axis of the coil bobbin portion 52.

Further, by receiving each of the elastic support portions 81 and 82 at the three movable range forming portions 54, the catching and friction when the movable body 20 is inserted into the coil bobbin portion 52 are reduced, and the assembling property is improved. The movable body 20 and the coil bobbin portion 52 can be easily positioned.

The coil bobbin portion 52 is housed in the case 10 in a state where the movable range forming portion 54 of the upper and lower end portions is in contact with the edge portion of the lid portion 12 and the edge portion of the bottom portion 114, and is housed in the edge portion of the bottom portion 114. It is fixed.

In the present embodiment, the flange portion 527 and 528 have a positioning engaging portion 529 that engages with the electromagnetic shield portion 58 and positions the electromagnetic shield portion 58 at a position surrounding the coils 61 and 62.

The positioning engagement portion 529 engages with the engaged portion 589 of the electromagnetic shield portion 58. In the present embodiment, the positioning engaging portion 529 is a concave groove that opens toward the central flange portion 526 at the outer peripheral portion of each flange portion 527 and 528, and engages with the convex engaged portion 589. do.

As described above, the positioning engaging portion 529 for positioning the electromagnetic shield portion is provided on the outer peripheral portion of the flange portion 527 and 528, that is, the outer diameter portion of the coil bobbin portion 52. By engaging the positioning engaging portion 529 and the engaged portion 589, the electromagnetic shield portion 58 is arranged without shifting with respect to the coils 61 and 62 wound around the coil bobbin portion 52, and stable magnetic characteristics are obtained. be able to. Further, as compared with the case where the electromagnetic shield portion 58 is positioned and assembled to the coil bobbin portion 52 only by engaging the terminal drawer portion 90 and the opening portion 582, a load is applied only to the terminal drawer portion 90 and the portion is deformed. Never.

As described above, the load applied to the terminal lead-out portion 90 does not deform the terminal entangled portion 53 of the terminal lead-out portion 90, and the deformation of the terminal entangled portion 53 is suppressed, so that the vibration actuator can be stably manufactured. An adhesive portion may be provided on the outer peripheral surface of the flange portions 526 to 528 having the same outer diameter, and the electromagnetic shield portion 58 may be fixed to each of the flange portions 526 to 528 via the adhesive portion. As a result, stable vibration characteristics can be realized.

<Coil>
In the vibration actuator 1, the coils 61 and 62 generate a drive source for the vibration actuator 1 together with the magnet 30 and the movable body cores 41 and 42 with the axial direction of the coils 61 and 62 (the magnetizing direction of the magnet 30) as the vibration direction. Used for. The coils 61 and 62 are energized during driving (during vibration) to form a voice coil motor together with the magnet 30.

The coils 61 and 62 are arranged in the coil mounting portions 52b and 52c, and the coils 61 and 62 are arranged at positions facing the movable body cores 41 and 42 in a direction orthogonal to the vibration direction in the present embodiment. Has been done.

In the coils 61 and 62, the center position of the length in the coil axial direction (vibration direction) is the center position of the length in the vibration direction of the movable body 20 (the center position in the vibration direction of the magnet 30) in the coil bobbin portion 52. It is held so that it is in substantially the same position (including the same position) in the vibration direction. The coils 61 and 62 of the present embodiment are configured to be wound in opposite directions to each other so that a current flows in the opposite directions when energized.

The respective ends of the coils 61 and 62 are entwined and connected to the terminal entwining portion 53 of the flange portion 526. The coils 61 and 62 are connected to the power supply unit (for example, the drive control unit 203 shown in FIGS. 35 and 36) via the terminal entwining unit 53. For example, each end of the coils 61 and 62 is connected to an AC supply unit via a terminal entwining portion 53, and an AC power supply (AC voltage) is supplied from the AC supply unit to the coils 61 and 62. As a result, the coils 61 and 62 can generate thrust that can move in the direction of contact and separation from each other in the axial direction of each other with the magnets.

In the present embodiment, the coils 61 and 62 are first connected to the terminal entwining portion 53-1 by entwining one end of the coil winding, as shown in FIGS. 8 and 16. The other end side of the winding whose one end is connected to the terminal entwining portion 53-1 is guided to the position where the first winding is formed in the coil mounting portion 52c by the coil guide portion 92-1 (arrow D1). Will be done. At this position of the first winding, the winding is wound counterclockwise (arrow D2) to form the first winding, and the winding is sequentially repeated counterclockwise (indicated by arrows D2 to D3). As a result, the coil 62 is arranged in the coil mounting portion 52c.

Next, the winding on the other end side of the coil 62 is passed through the connecting groove portion 55 (indicated by the arrow D4), and the winding direction is reversed in the connecting groove portion 55 (see the arrow D5) by the coil guide portion 92-2. , Guided to the position of the first roll of the coil mounting portion 52b. The winding is wound at the coil mounting portion 52b in the direction opposite to that of the coil mounting portion 52c, and here it is wound clockwise (indicated by arrows D6 to D7). The coil 61 is arranged in the coil mounting portion 52b by sequentially winding the windings clockwise. In the present embodiment, the coils 61 and 62 are configured by one winding, but the present invention is not limited to this, and separate coils 61 and 62 may be used. In this configuration, when the separate coils are configured by winding windings in the same direction, they supply currents in different directions at the time of driving.

It is preferable that the coil shafts of the coils 61 and 62 are arranged coaxially with the shaft of the coil bobbin portion 52 or the shaft of the magnet 30.
The coils 61 and 62 are formed in a cylindrical shape by winding a coil wire around the coil mounting portions 52b and 52c from the outside of the coil bobbin portion 52. With this configuration, the coil bobbin portion 52 having the coils 61 and 62 can assemble the coils without using self-bonding wires in order to maintain the cylindrical bodies of the coils 61 and 62, respectively. That is, since it is not necessary to use an air-core coil as the coil, the cost of the coils 61 and 62 themselves can be reduced, and the cost of the entire vibration actuator can be reduced.

Further, the coils 61 and 62 are surrounded by an electromagnetic shield portion 58 on the inner surface of the case 10, are sealed by the coil mounting portions 52b and 52c, and are fixed by adhesion or the like in the coil mounting portions 52b and 52c. .. In the present embodiment, the coils 61 and 62 are fixed to all of the bobbin main body portion 522 and the flange portions 526 to 528 by adhesion. Therefore, the coils 61 and 62 can increase the joint strength with the coil bobbin portion 52, and even when a large impact is applied, the coils 61 and 62 are damaged as compared with the configuration in which the movable body is in direct contact with the coil. There is no.

<Electromagnetic shield part 58>
The electromagnetic shield portion 58 is a tubular magnetic material that is arranged at a position that surrounds the outer peripheral surface of the coil bobbin portion 52 and covers the coils 61 and 62 on the outer side in the radial direction. The electromagnetic shield portion 58 constitutes a fixed body side magnetic circuit together with the coils 61 and 62, and leaks to the outside of the vibration actuator 1 in the movable body side magnetic circuit, that is, the magnetic circuit configured together with the magnet 30 and the movable body cores 41 and 42. Prevent magnetic flux.

The electromagnetic shield portion 58 is arranged so that the center of the length of the electromagnetic shield portion 58 in the vibration direction is at the same height as the center of the magnet 30 arranged inside in the vibration direction. Due to the shielding effect of the electromagnetic shield portion 58, it is possible to reduce the magnetic flux leaking to the outside of the vibration actuator.

Further, the electromagnetic shield portion 58 can increase the thrust constant in the magnetic circuit to improve the electromagnetic conversion efficiency. The electromagnetic shield portion 58 has a function as a magnetic spring together with the magnet 30 by utilizing the magnetic attraction force of the magnet 30, and can reduce the stress when the elastic support portions 81 and 82 are made into mechanical springs. The durability of the elastic support portions 81 and 82 can be improved.

The electromagnetic shield portion 58 is provided with an opening 582 through which the terminal entwining portion 53 is inserted.
As shown in FIGS. 22 and 23, the opening 582 is fitted to the terminal lead-out portion 90 and functions as a circumferential rotation stop of the electromagnetic shield portion 58 with respect to the coil bobbin portion 52.

In the present embodiment, the opening 582 is formed in the central portion of the electromagnetic shield portion 58 body in a shape longer in the circumferential direction than in the vertical direction. As a result, since the electromagnetic shield portions 58 are present above and below the opening 582, the imbalance of the magnetic attraction force and the leakage flux in the magnetic circuit can be suppressed to a minimum in a well-balanced manner.

In the present embodiment, the opening 582 is provided at the center of the electromagnetic shield portion 58 in the vertical direction (vibration direction), but the terminal entwining portion 53 of the coil bobbin portion 52 to be accommodated is externally provided. Any configuration may be provided as long as it is configured to protrude.

For example, the drive unit 13A shown in FIGS. 24 and 25 differs only in the configuration of the electromagnetic shield portion 58A in the configuration of the drive unit 13.

The electromagnetic shield portion 58A of the drive unit 13A is provided with an opening 582A in a shape in which one opening side of the cylindrical electromagnetic shield portion 58A is cut out.

That is, the opening 582A of the electromagnetic shield portion 58A is formed so as to penetrate the electromagnetic shield portion 58A and open at the opening edge portion on one side in the tubular electromagnetic shield portion 58A. In this way, when the electromagnetic shield portion 58A is formed so that the opening 582 is opened to one side, the electromagnetic shield portion 58A is laterally exteriorized from the opening side on one side with respect to the coil bobbin portion 52A. Can be assembled. This makes it possible to easily assemble the electromagnetic shield portion 58A to the coil bobbin portion 52A. In particular, even when the vibration actuator is made smaller and thinner, it is possible to provide an opening in the electromagnetic shield portion 58A, and it is possible to improve the assembling property.

Further, the electromagnetic shield portion 58 is provided with an engaged portion 589 which is formed in a convex shape on the opening edge portion which opens on both sides in the axial direction and engages with the positioning engaging portion 529.
The engaged portion 589 is provided at a position corresponding to the positioning engaging portion 529. When the engaged portion 589 engages with the positioning engaging portion 529, the electromagnetic shield portion 58 is restricted from moving in the circumferential direction and the vertical direction with respect to the coil bobbin portion 52, and surrounds the coils 61 and 62. It will be positioned at the position.

<Elastic support portions 81, 82>
The elastic support portions 81 and 82 reciprocally support the movable body 20 with respect to the fixed body 50 in the vibration direction.

The elastic support portions 81 and 82 sandwich the movable body 20 in the vibration direction of the movable body 20, and are erected on both the movable body 20 and the fixed body 50 so as to intersect the vibration direction. In the present embodiment, the elastic support portions 81 and 82 are arranged apart from each other at both ends (upper and lower end portions) of the movable body 20 which are separated in the vibration direction in the movable body 20, as shown in FIGS. 2 to 4, and are fixed bodies. Connect with 50. In the present embodiment, the elastic support portions 81 and 82 are arranged so as to face each other in a direction orthogonal to the vibration direction, respectively.

The elastic support portions 81 and 82 have inner peripheral portions 802 fitted to both end portions (spring fixing portions 224 and 244) separated in the axial direction (vibration direction) of the movable body 20, and the outer peripheral fixing portions are fitted to the movable body 20. The 806 side is attached so as to project outward in the radial direction (radial direction).

The elastic support portions 81 and 82 support the movable body 20 so as not to come into contact with the fixed body 50 during non-vibration and vibration of the movable body 20. Even if the elastic support portions 81 and 82 come into contact with the inner peripheral surface 522a of the bobbin main body portion 522 of the movable body 20 when the movable body 20 is driven (vibrated), the magnetic circuit, specifically, the coil 61. , 62 is not damaged. The elastic support portions 81 and 82 may be formed of any material as long as they elastically support the movable body 20. The elastic support portions 81 and 82 are the same members having the same configuration in the present embodiment.

The elastic support portions 81 and 82 are a plurality of flat plate-shaped leaf springs, respectively. The movable body 20 may have a plurality of elastic support portions 81 and 82 as three or more leaf springs. These plurality of leaf springs are attached along a direction orthogonal to the vibration direction.

The elastic support portions 81 and 82, which are leaf springs, have an arcuate deformation in a plan view in which an annular inner peripheral portion 802, which is an inner spring end portion, and an outer peripheral fixing portion 806, which is an outer spring end portion, are elastically deformed. It has a shape joined by an arm 804. The deformation arm 804 and the outer peripheral fixing portion 806 form the outer peripheral portions 807 of the elastic support portions 81 and 82, respectively. Due to the deformation of the deformation arm 804, the inner peripheral portion 802 and the outer peripheral fixing portion 806 are relatively displaced in the axial direction.

In the elastic support portions 81 and 82, the outer peripheral fixing portion 806 is joined to the fixed body 50, and the inner peripheral portion 802 is joined to the movable body 20.

In the present embodiment, the leaf springs as the elastic support portions 81 and 82 are formed by sheet metal processing using a stainless steel plate, and more specifically, they are thin flat plate disk-shaped spiral springs. Since the elastic support portions 81 and 82 have a flat plate shape, it is possible to improve the position accuracy, that is, the machining accuracy, as compared with the conical spring.

In the present embodiment, the plurality of elastic support portions 81 and 82 have the same direction of spirals, and the outer peripheral fixing portion 806, which is one end on the outer peripheral side, is fixed to the fixed body 50 and the inner peripheral side. The inner peripheral portion 802, which is the other end of the above, is fixed to the movable body 20.

As described above, in the present embodiment, a plurality of spiral leaf springs are used as the plurality of elastic support portions 81 and 82, and are attached to both ends of the movable body 20 which are separated in the vibration direction to the fixed body 50. On the other hand, the movable body 20 is elastically supported. As a result, when the amount of movement of the movable body 20 becomes large, the movable body moves in the translational direction (here, in the direction on the plane perpendicular to the vibration direction) while rotating slightly. If the directions of the vortices of the plurality of leaf springs are opposite to each other, the plurality of leaf springs will move in the buckling direction or the pulling direction with each other, and smooth movement will be hindered.

Since the elastic support portions 81 and 82 of the present embodiment are fixed to the movable body 20 so that the directions of the spirals are the same, they move smoothly even if the amount of movement of the movable body 20 becomes large, that is, , It can be deformed, the amplitude becomes larger, and the vibration output can be increased.
However, depending on the vibration range of the desired movable body 20, the design may be such that the spiral directions of the plurality of elastic support portions 81 and 82 are opposite to each other.

The plate-shaped elastic support portions 81 and 82 have the inner peripheral portions 802 of the elastic support portions 81 and 82 with respect to the movable body 20, and the spring fixing portions 224 forming the end portions of the movable body 20 in the vibration direction. It is arranged on top of 244. As described above, the inner peripheral portions 802 of the elastic support portions 81 and 82 are fixed by being sandwiched between the flanges 264 and 284 of the fixing pins 26 and 28 and the spring fixing portions 224 and 244.

On the other hand, the outer peripheral fixing portion 806 of the upper elastic support portion 81 is fixed to the upper end portion of the coil bobbin portion 52 on the outer side in the radial direction. Specifically, the outer peripheral fixing portion 806 of the elastic support portion 81 is fixed to a portion avoiding the movable range forming portion 54 on the annular upper end surface 527a of the upper flange portion 527 forming the upper end portion of the coil bobbin portion 52. To.

The outer peripheral fixing portion 806 of the elastic support portion 81 is sandwiched and fixed in the case 10 between the annular upper end surface 527a of the flange portion 527 and the pressing portion 128 of the lid portion 12. The upper end surface 527a is an upper end surface (one side) of the upper side (one side) of the upper side (one side) flange portion 527, which avoids the movable range forming portion 54.

Further, the outer peripheral fixing portion 806 of the lower elastic support portion 82 is fixed to the lower end portion of the coil bobbin portion 52 on the outer side in the radial direction. Specifically, the outer peripheral fixing portion 806 of the elastic support portion 82 is fixed to a portion of the annular lower end surface 528a of the lower flange portion 528 forming the lower end portion of the coil bobbin portion 52, avoiding the movable range forming portion 54. Will be done.

The outer peripheral fixing portion 806 of the elastic support portion 82 is sandwiched and fixed in the case 10 between the annular lower end surface 528a of the flange portion 528 and the stepped portion 118 provided on the peripheral edge portion of the bottom portion 114.

As described above, the elastic support portions 81 and 82 are arranged in the direction orthogonal to the vibration direction by the opening end faces 527a and 528a of the upper and lower opening edges of the coil bobbin portion 52 and the lid portion 12 and the bottom portion 114 of the case 10. It is sandwiched in a state. Further, the movable body 20 is housed in the coil bobbin portion 52 around which the coils 61 and 62 are wound, and the inner peripheral portions 802 of the elastic support portions 81 and 82 are fixed to the upper and lower ends of the movable body 20 and the coil bobbin is formed. The outer peripheral fixing portions 806 of the elastic support portions 81 and 82 are fixed to the upper end portions of the portions 52. As a result, the drive unit 13 is configured as having a defined positional relationship between the coils 61 and 62 and the movable body 20, and can be easily arranged in the case 10.

In the present embodiment, the elastic support portions 81 and 82 have the deformation arm 804 or the deformation arm 804 and the outer peripheral fixing portion 806 having a damping portion (damper) 72 as a damping means for damping the vibration generated in the elastic support portion 81. It is attached. The damping means suppresses the resonance peak and generates stable vibration over a wide range in the elastic support portion 81.

As shown in FIGS. 6 and 7, for example, the damping portion 72 of the present embodiment is an elastomer having a T-shaped cross section, and has a plate-shaped flange 722 and a push-in portion protruding from the center of the flange 722. It has a portion 724.

The damping portion 72 inserts the push-in portion 724 from one surface side of the elastic support portion 81 (82) for the spring portion, specifically between the outer peripheral fixing portion 806 and the deformation arm 804, and inserts the flange 722 into the flange 722. It is positioned so that it spans between the spring parts. The mounting portion 73 is a thermosetting resin or an adhesive that does not adhere to the elastic support portion 81 (82), and has a shape such that the push-in portion 724 does not come off from the spring portion on the back surface side of the elastic support portion 81 (82). It is fixed to the push-in portion 724 with. In FIGS. 2, 12, 14, 20, and 34, the damping portion 72 is a member fixed with the elastic support portion 81 (82) sandwiched from both sides via the push-in portion 724. It is illustrated as. The damping portion 72 may not be an elastomer as long as it is made of a material having a damping function, and may be formed of a thermosetting resin, an adhesive, or the like. The damping portion 72 is any shape as long as the elastic support portion 81 (82) is sandwiched from both sides by a plate-shaped flange and another member joined to a member having the same function as this flange by a push-in portion. It may be configured as follows.

With this configuration, the damping portion 72 attenuates the sharp spring resonance in the elastic support portion 81 (82), and prevents the vibration in the vicinity of the resonance frequency from becoming significantly large, so that the difference in vibration due to the frequency becomes large. As a result, the movable body 20 can suppress the resonance peak and generate stable vibration over a wide range without contacting the lid portion 12 and the bottom portion 114 before being plastically deformed, and the contact causes abnormal noise. There is no. The damping portion 72 may be formed of any shape, material, or the like as long as it prevents the occurrence of sharp vibration in the elastic support portion 81 (82).

<Case 10>
FIG. 10 is a perspective view of the bottom surface of the case body, and FIG. 11 is a view of the lid portion as viewed from the back surface side. As shown in FIGS. 1, 3, 10, and 11, the case 10 has a bottomed cylindrical case body 11 having a peripheral wall portion 112 and a bottom portion 114, and a lid portion that closes an opening 115 of the case body 11. Has 12 and.

The lid portion 12 and the bottom portion 114 constitute a top surface portion 122 and a bottom surface portion (bottom portion 114) of the vibration actuator 1 in the present embodiment, and a predetermined interval is provided between the movable body 20 of the drive unit 13 in the vibration direction of the movable body 20. Are placed facing each other. The lid portion 12 is provided so as to hang down from a part of the outer periphery of the top surface portion 122, and has a hanging portion 124 that engages with the notch 102 of the case body 11.

The lid portion 12 and the bottom portion 114 each suppress the movable range of the movable body 20. The lid portion 12 and the bottom portion 114 have a function as a movable range suppressing portion that serves as a hard stop (limited to the movable range) of the movable body 20.

Specifically, the lid portion 12 and the bottom portion 114 regulate the movable range formed by the movable range forming portion 54. That is, the lid portion 12 and the bottom portion 114 have a length from the lid portion 12 and the bottom portion 114 to the edge portion of the upper and lower end portions of the drive unit 13 (coil bobbin portion 52) (open end faces 527a and 528a of the upper and lower flange portions 527 and 528). Regulate the closure. As a result, the hollow of the case 10 forms a movable body space, which is a space in which the movable body 20 moves.

As described above, the movable body space is defined to have a length within a range in which the elastic support portions 81 and 82 are not plastically deformed. Therefore, even when a force exceeding the movable range is applied to the movable body 20, the elastic support portions 81 and 82 come into contact with the fixed body 50 (at least one of the lid portion 12 and the bottom portion 114) without plastic deformation. Reliability can be improved without damaging the elastic support portions 81 and 82.

Further, the lid portion 12 and the bottom portion 114 are provided with through the ventilation holes 126 and 116, respectively. The ventilation holes 126 and 116 respectively release the compressed air formed by the reciprocating vibration of the movable body 20 to the outside in the case 10.

FIG. 26 is an external perspective view of the vibration actuator 1 according to the embodiment of the present invention as viewed from the notch side. 27 is an external perspective view of the vibration actuator in a state where the cable W is connected to the terminal entwining portion 53, and FIG. 28 is an enlarged view of the connecting portion between the terminal entwining portion 53 and the cable W shown in FIG. 27. It is a figure.

As shown in FIG. 26, the notch 102 of the case 10 is provided with a terminal drawer 90 and a hanging portion 124 of the coil bobbin portion 52, and is closed by the terminal drawer portion 90 and the hanging portion 124.
As a result, the terminal entwining portion 53 is arranged in a state of protruding outward from the notch 102 of the case 10, and the connection with the external device is facilitated via the terminal entwining portion 53.

Further, a protrusion 119 for fixing the wiring is provided on the outer peripheral surface of the case 10. As shown in FIGS. 27 and 28, the wiring fixing protrusion 119 is configured to engage the cable W connected to the terminal entwining portion 53, and engages and holds the cable W. As a result, the cable W fixed by the protrusion 119 can be connected to the terminal entwining portion 53 with its end Wa so as to be electrically connected with high accuracy.

The protrusion 119 is preferably formed in the vicinity of the opening 582 into which the terminal lead-out portion 90 is fitted. As a result, the cable W can be held in the vicinity of the terminal entwining portion 53, and the work for connecting the cable W to the terminal entwining portion 53 can be easily performed.

As shown in FIG. 29, the protrusion 119 is a vertical piece that protrudes vertically in a direction intersecting the protrusion 1192 protruding from the outer peripheral surface of the case 10 and the protrusion 1192 from the tip of the protrusion 1192. It has 1194. The projecting piece 1192 and the vertical piece 1194 form a groove 1190 that can be wired together with the outer peripheral surface, and the cable W is engaged by being fitted in the groove 1190 to fix the cable W.

In the present embodiment, the protrusion 119 is formed by connecting the vertical piece 1194 from the tip of the protrusion 1192 in a T-shaped cross section. As a result, the protrusion 119 has two grooves 1190 sandwiching the protrusion 1192. Therefore, the two wirings of the cable W can be internally fitted and held in the groove 1190, respectively, and the process can be stabilized and the wiring itself can be easily held.

The protrusion 119 may hold the cable W so that the end Wa of the cable W can be connected to the terminal entwining portion 53 with high accuracy. For example, the protrusion 119A for fixing the wiring shown in FIG. 30 is joined to the tip of the protruding piece 1196 protruding from the outer peripheral surface of the case 10 perpendicularly to the protruding piece 1196, and has an L-shaped cross section together with the protruding piece 1196. It may be configured to have a vertical piece 1198.

In the protrusion 119A, a groove 1190A is formed by the protrusion 1196, the outer peripheral surface, and the vertical piece 1198. The protrusion 119A can hold two wirings of the cable W together in the groove 1190A, and can obtain the same effect as the T-shaped protrusion 119.
It is preferable that the end Wa of the cable W is configured so as to be easily connectable to the terminal entwining portion 53.

FIG. 31 shows the end Wa of the cable W.
In the present embodiment, the end Wa of the cable W has a shape that can be easily engaged with the pin-shaped terminal entwining portion 53, and is formed in a U shape. Further, as shown in FIG. 32, the end Wa1 of the cable W may be formed in a ring shape partially cut out.

The end Wa having such a shape can be hooked and held by the terminal entwining portion 53, and soldering can be performed in the hooked state, that is, in the positioned state. Therefore, the end Wa can be securely fixed to the terminal entwining portion 53 in a stable and conductive state, and the conduction step can be easily performed.

<Operation of vibration actuator 1>
Regarding the operation of the vibration actuator 1, in the magnet 30, the front surface 30a side on one side (upper side in the present embodiment) of the magnetizing direction is the N pole, and the back surface 30b side on the other side (lower side in the present embodiment) in the magnetizing direction is the N pole. The case where the magnetism is performed so as to be the S pole will be described as an example.

In the vibration actuator 1, the movable body 20 is considered to correspond to the mass portion in the spring-mass system vibration model. Therefore, when the resonance is sharp (has a steep peak), the vibration is attenuated to obtain a steep peak. Suppress. By attenuating the vibration, the resonance is not steep, the maximum amplitude value and the maximum movement amount of the movable body 20 at the time of resonance do not vary, and the vibration with a suitable stable maximum movement amount is output.

In the vibration actuator 1, the magnetic circuit shown in FIG. 12 is formed. Further, in the vibration actuator 1, the coils 61 and 62 are arranged so that the coil shafts are orthogonal to the magnetic fluxes of the movable body cores 41 and 42 that sandwich the magnet 30 in the vibration direction.

Specifically, it emits from the surface 30a side of the magnet 30, is radiated from the movable body core 41 to the coil 61 side, passes through the electromagnetic shield portion 58, passes through the coil 62, and is transmitted from the movable body core 42 on the lower side of the magnet 30. The flow mf of the magnetic flux incident on the magnet 30 is formed.

Therefore, when energization is performed as shown in FIG. 12, the interaction between the magnetic field of the magnet 30 and the current flowing through the coils 61 and 62 causes a Lorentz force in the −f direction in the coils 61 and 62 according to Fleming's left-hand rule. ..

The Lorentz force in the −f direction is a direction orthogonal to the direction of the magnetic field and the direction of the current flowing through the coils 61 and 62. Since the coils 61 and 62 are fixed to the fixed body 50 (coil bobbin portion 52), the force opposite to the Lorentz force in the −f direction is in the F direction to the movable body 20 having the magnet 30 according to the law of action and reaction. It is generated as a thrust of. As a result, the movable body 20 side having the magnet 30 moves in the F direction, that is, toward the lid portion 12 (top surface portion 122 of the lid portion 12) (see FIG. 13).

Further, when the energization directions of the coils 61 and 62 are switched in the opposite directions and the coils 61 and 62 are energized, a Lorentz force in the F direction in the opposite direction is generated. Due to the generation of the Lorentz force in the F direction, a force opposite to the Lorentz force in the F direction is generated in the movable body 20 as a thrust (thrust in the −F direction) according to the law of action and reaction, and the movable body 20 -Move in the F direction, that is, toward the bottom 114 of the fixed body 50 (see FIG. 14).

In the vibration actuator 1, a magnetic attraction force acts between the magnet 30 and the electromagnetic shield portion 58 in the non-driving state (non-vibration state) when the power is not supplied, and the vibration actuator 1 functions as a magnetic spring. The movable body 20 returns to its original position due to the magnetic attraction generated between the magnet 30 and the electromagnetic shield portion 58 and the restoring force that tries to return to the original shape of the elastic support portions 81 and 82.

The vibration actuator 1 includes a fixed body 50 having coils 61 and 62, and a movable body 20 having a magnet 30 arranged radially inside the coils 61 and 62 and magnetized in the axial direction of the coils 61 and 62. To prepare for. In addition, the vibration actuator 1 includes flat plate-shaped elastic support portions 81 and 82 that elastically hold the movable body 20 in the vibration direction, which is the coil axial direction.

Further, the coils 61 and 62 are arranged on the outer periphery of the bobbin main body portion 522 of the coil bobbin portion 52, and the outer peripheral surface 20a of the movable body 20 is arranged on the inner peripheral side of the bobbin main body portion 522 at intervals. , 62 has an outer peripheral surface surrounded by an electromagnetic shield portion 58.

The elastic support portions 81 and 82 support the movable body 20 at a predetermined distance from the inner peripheral surface 522a of the bobbin main body portion 522 so as not to come into contact with the movable body 20 during non-vibration and vibration.

Further, since the coils 61 and 62 are arranged on the outer periphery of the bobbin main body 522, that is, the coils 61 and 62 are wound around the outer periphery of the bobbin main body 522, compared with the case where the air core coil is used. , It is possible to reduce the cost. Further, the vibration actuator 1 has a structure in which the drive unit 13 is housed in the case 10, and the outer peripheral surface of the peripheral wall portion 112 of the case 10 can be configured as a smooth surface. As a result, when the vibration actuator 1 is attached to an electronic device, it is possible to reliably and easily attach a cushioning material such as a sponge to be interposed between the vibration actuator 1 and the attachment portion.

The coils 61 and 62 are arranged on the outer peripheral side of the coil bobbin portion 52, which is a coil holding portion arranged in the case 10. Therefore, in the configuration in which the coils 61 and 62 are arranged on the inner peripheral side of the coil holding portion, it is not necessary to carry out the work of taking out the end portion of the coil wire to connect with an external device at the time of assembly.

Further, since the vibration actuator 1 is configured by arranging the drive unit 13 in the case 10, the elastic support portions 81 and 82, which require high dimensional accuracy, are fixed by assembling to the coil bobbin portion 52. Can be done. Thereby, the arrangement of the movable body 20 including the fixing of the elastic support portions 81 and 82 can be determined with the coil bobbin portion 52 as a reference, and the accuracy of the vibration generation direction as a product can be improved. Specifically, for example, the movable body 20 (magnet 30) attached via the coils 61 and 62 and the elastic support portions 81 and 82 only by increasing the dimensional accuracy of the coil bobbin portion 52 formed as one component by resin or the like. ) Can be easily positioned in an accurate positional relationship.

Further, by attaching the electromagnetic shield portion 58 to the coil bobbin portion 52 arranged in the case 10 so as to surround the coils 61 and 62, the outer peripheral surface of the peripheral wall portion 112 in the case 10 becomes a resin having good surface accuracy and is smooth. It becomes a face. As a result, the bonding state of the member to which the cushioning material is attached, for example, the double-sided tape is improved, and the bonding strength can be increased.

Further, since the terminal entwining portion 53 is provided in the coil bobbin portion 52 so as to project outward, the coil wire of the coil can be easily entangled and soldered, and the connection between the external device and the coils 61 and 62 can be facilitated. Can be easily done.

Further, the case 10 is formed of a bottomed cylindrical case body, that is, a cup-shaped case body 11 and a lid portion 12. As a result, the number of parts can be reduced, the assembling property can be improved, and the impact resistance can be improved, as compared with the configuration in which the peripheral wall portion 112 and the bottom portion 114 are separated.

Further, the lid portion 12 is fixed by welding to the opening portion 115 of the cup-shaped case body 11. As shown in FIG. 34, the lid portion 12 accommodates the coil bobbin portion 52 to which the movable body 20 is attached via the elastic support portions 81 and 82 in the case main body 11, and then closes the opening portion 115. , Fits into the opening 115 of the case body 11. Then, the opening end 115a of the opening 115 extending above the lid 12 around the lid 12 is crimped and bent, so that the lid 12 is fixed to the case body 11.

Further, it is preferable that the cable W is adhesively fixed to these protrusions 119 and 119A.
For example, as shown in FIG. 33, in the protrusion 119, the cable W is fixed by an adhesive in a state where the end Wa is connected to the terminal entwining portion 53. The region R1 shown in FIG. 33 indicates an adhesive region to which the adhesive is applied.

By adhering the cable W at the protrusion 119, even when an external force is applied to the cable W, the cable W does not come off from the terminal entwined portion 53, and the risk of malfunction such as disconnection can be suppressed.

In addition, the fixing strength is improved and the impact resistance can be improved as compared with the adhesive fixing. Further, the process is not complicated from the coating process to the curing process, the process is simple, and the tact time can be reduced.

Further, in the vibration actuator 1, the movable body 20 has a gap between the fixed body 50 and the bobbin main body 522 when it is not moving and when it is moving, that is, when it is vibrating. Be supported. As a result, the movable body 20 does not come into contact with the fixed body 50 while it is moving, that is, during vibration.

Further, the movable body 20 comes into contact with the inner peripheral surface 522a of the bobbin main body 522 only when an impact is applied to the vibration actuator 1 itself, such as when the vibration actuator 1 is dropped. That is, only when there is an impact, the movable body 20 and the bobbin main body 522 move relative to each other in the range between the outer peripheral surface 20a of the movable body 20 and the inner peripheral surface 522a of the bobbin main body 522, and the movable body 20 Does not come into contact with the coils 61 and 62.

As described above, according to the vibration actuator 1, unlike the conventional vibration actuator, the movable body 20 is displaced by the impact applied to the vibration actuator and comes into contact with the inner wall of the fixed body without giving an impact. That is, the coils 61 and 62 of the fixed body 50 are not damaged by the impact. Further, the elastic support portions 81 and 82 themselves are not deformed by the impact, and problems such as immobility of the movable body 20 caused by the deformation of the elastic support portions 81 and 82 can be solved.

As described above, according to the vibration actuator 1, it is possible to output a suitable perceived vibration having impact resistance and high vibration expressive power.

The vibration actuator 1 is driven by an alternating current wave input to the coils 61 and 62 from the power supply unit (for example, the drive control unit 203 shown in FIGS. 35 and 36). That is, the energization directions of the coils 61 and 62 are periodically switched, and the thrust in the F direction on the top surface portion 122 side of the lid portion 12 and the thrust in the −F direction on the bottom portion 114 side act alternately on the movable body 20. As a result, the movable body 20 vibrates in the vibration direction (the winding axis direction of the coils 61 and 62 orthogonal to the radial direction of the coils 61 and 62, or the magnetizing direction of the magnet 30).

The driving principle of the vibration actuator 1 will be briefly described below. In the vibration actuator 1 of the present embodiment, when the mass of the movable body 20 is m [kg] and the spring constant of the springs (elastic support portions 81 and 82 which are springs) is K _sp , the movable body 20 is a fixed body. It vibrates with respect to 50 at the resonance frequency _Fr [Hz] calculated by the following equation (1).

Since the movable body 20 is considered to form a mass portion in the vibration model of the spring-mass system, when an AC wave having a frequency equal to the resonance frequency _Fr of the movable body 20 is input to the coils 61 and 62, the movable body 20 is used. Is in resonance. That is, the movable body 20 can be efficiently vibrated by inputting an AC wave having a frequency substantially equal to the resonance frequency _Fr of the movable body 20 to the coils 61 and 62 from the power supply unit.

The equation of motion and the circuit equation showing the driving principle of the vibration actuator 1 are shown below. The vibration actuator 1 is driven based on the equation of motion represented by the following equation (2) and the circuit equation represented by the following equation (3).

That is, the mass m [kg], the displacement x (t) [m], the thrust constant K _f [N / A], the current i (t) [A], the spring constant K _sp [N / m] in the vibration actuator 1, The attenuation coefficient D [N / (m / s)] and the like can be appropriately changed within the range satisfying the equation (2). Further, the voltage e (t) [V], the resistance R [Ω], the inductance L [H], and the counter electromotive force constant K _e [V / (rad / s)] are appropriately set within the range satisfying the equation (3). Can be changed.

As described above, in the vibration actuator 1, the coils 61 and 62 are energized by the AC wave corresponding to the resonance frequency _Fr determined by the mass m of the movable body 20 and the spring constants K _sp of the elastic support portions 81 and 82 which are leaf springs. When this is done, a large vibration output can be efficiently obtained.

Further, the vibration actuator 1 satisfies the equations (2) and (3) and is driven by a resonance phenomenon using the resonance frequency represented by the equation (1). As a result, in the vibration actuator 1, the power consumed in the steady state is only the loss due to the damping unit 72, and the movable body 20 can be driven with low power consumption, that is, the movable body 20 can be linearly reciprocated with low power consumption. Further, by increasing the damping coefficient D, vibration can be generated over a high band.

According to the present embodiment, since the plate-shaped elastic support portions 81 and 82 are arranged vertically (vibration direction) of the movable body 20, the movable body 20 is stably driven in the vertical direction, and at the same time, the magnet 30 is used. The magnetic fluxes of the coils 61 and 62 can be efficiently distributed from the upper and lower elastic support portions 81 and 82. As a result, high output vibration can be realized as the vibration actuator 1.

Further, the fixed body 50 has a coil bobbin portion 52 that also has a function of holding the coils 61 and 62 and a function of protecting the coils 61 and 62 against the movable body 20. As a result, even if the fixed body 50 receives an impact, it can withstand the impact and does not cause damage such as deformation to the elastic support portions 81 and 82. Further, since the impact is transmitted to the coils 61 and 62 via the resin bobbin main body 522, damage can be suppressed and the vibration actuator 1 is highly reliable.
As described above, according to the vibration actuator 1, it is possible to realize miniaturization at low cost, have impact resistance, and generate suitable perceived vibration at high output.

(Electronics)
35 and 36 are views showing an example of a mounting form of the vibration actuator 1. FIG. 35 shows an example in which the vibration actuator 1 is mounted on the game controller GC, and FIG. 36 shows an example in which the vibration actuator 1 is mounted on the mobile terminal M.

The game controller GC is connected to the game machine main body by wireless communication, for example, and is used by being grasped or grasped by the user. Here, the game controller GC has a rectangular plate shape, and the user grasps and operates the left and right sides of the game controller GC with both hands.

The game controller GC notifies the user of a command from the game machine main body by vibration. Although not shown, the game controller GC includes functions other than command notification, for example, an input operation unit for the game machine main body.

The mobile terminal M is, for example, a mobile communication terminal such as a mobile phone or a smartphone. The mobile terminal M notifies the user of an incoming call from an external communication device by vibration, and realizes each function of the mobile terminal M (for example, a function that gives a feeling of operation and a sense of presence).

As shown in FIGS. 35 and 36, the game controller GC and the mobile terminal M have a communication unit 201, a processing unit 202, a drive control unit 203, and vibration actuators 204 and 205, which are vibration actuators 1 as drive units, respectively. Has 206. In the game controller GC, a plurality of vibration actuators 204 and 205 are mounted.

In the game controller GC and the mobile terminal M, the vibration actuators 204, 205, 206 are, for example, parallel to the main surface of the terminal and the surface orthogonal to the vibration direction of the vibration actuators 204, 205, 206, here the bottom surface of the bottom 114. It is preferable that it is implemented so as to be. The main surface of the terminal is a surface that comes into contact with the body surface of the user, and in the present embodiment, means a vibration transmission surface that comes into contact with the body surface of the user and transmits vibration. The main surface of the terminal and the bottom surface of the bottom 114 of the vibration actuators 204, 205, 206 may be arranged so as to be orthogonal to each other.

Specifically, in the game controller GC, the vibration actuators 204 and 205 so that the vibration direction is orthogonal to the surface where the fingertips, finger pads, and palms of the operating user come into contact with each other, or the surface provided with the operation unit. Is implemented. Further, in the case of the mobile terminal M, the vibration actuator 206 is mounted so that the vibration direction is orthogonal to the display screen (touch panel surface). As a result, vibration in a direction perpendicular to the main surface of the game controller GC and the mobile terminal M is transmitted to the user.

The communication unit 201 is connected to an external communication device by wireless communication, receives a signal from the communication device, and outputs the signal to the processing unit 202. In the case of the game controller GC, the external communication device is a game machine main body as an information communication terminal, and communication is performed according to a short-range wireless communication standard such as Bluetooth (registered trademark). In the case of the mobile terminal M, the external communication device is, for example, a base station, and communication is performed according to the mobile communication standard.

The processing unit 202 converts the input signal into a drive signal for driving the vibration actuators 204, 205, and 206 by the conversion circuit unit (not shown) and outputs the signal to the drive control unit 203. In the mobile terminal M, the processing unit 202 outputs a drive signal based on a signal input from the communication unit 201 and a signal input from various functional units (not shown, for example, an operation unit such as a touch panel). Generate.

The drive control unit 203 is connected to the vibration actuators 204, 205, 206, and a circuit for driving the vibration actuators 204, 205, 206 is mounted. The drive control unit 203 supplies drive signals to the vibration actuators 204, 205, 206.

The vibration actuators 204, 205, and 206 are driven according to a drive signal from the drive control unit 203. Specifically, in the vibration actuators 204, 205, 206, the movable body 20 vibrates in a direction orthogonal to the main surface of the game controller GC and the mobile terminal M.

The movable body 20 may be brought into contact with the top surface portion 122 or the bottom portion 114 of the lid portion 12 via a damper each time the movable body 20 vibrates. In this case, the impact on the top surface 122 or the bottom 114 of the lid 12 due to the vibration of the movable body 20, that is, the impact on the housing is directly transmitted to the user as vibration. In particular, since the game controller GC is equipped with a plurality of vibration actuators 204 and 205, it is possible to drive one or both of the plurality of vibration actuators 204 and 205 at the same time according to the input drive signal. can.

Since the vibration in the direction perpendicular to the body surface is transmitted to the body surface of the user who comes into contact with the game controller GC or the mobile terminal M, it is possible to give a sufficient perceived vibration to the user. In the game controller GC, the perceived vibration to the user can be applied by one or both of the vibration actuators 204 and 205, and at least the strong and weak vibration can be selectively applied to the vibration with high expressive power.

Although the invention made by the present inventor has been specifically described above based on the embodiment, the present invention is not limited to the above embodiment and can be changed without departing from the gist thereof.

Further, the vibration actuator according to the present invention is applied to a portable device other than the game controller GC and the mobile terminal M (for example, a mobile information terminal such as a tablet PC, a portable game terminal, a wearable terminal worn and used by a user). Suitable for cases. Further, the vibration actuator 1 of the present embodiment can be used not only for the above-mentioned portable device but also for an electric hairdressing and beauty device such as a facial massager that requires vibration.

The vibration actuator according to the present invention can be miniaturized at low cost, has impact resistance, can give a user a suitable perceived vibration with a high output, and can be used as an electronic device such as a game machine terminal or a mobile terminal. It is useful as a device to be mounted on a device.

1 Vibration actuator 9 Routing part 10 Case 11 Case body 12 Lid part 13, 13A Drive unit 20 Movable body 20a Outer peripheral surface 30 Magnet 30a Surface 30b Back surface 41, 42 Movable body core 50 Fixed body 52, 52A Coil bobbin part (coil holding part)
52b, 52c Coil mounting part 53, 53-1, 53-2 Terminal entwining part (coil connection part)
54 Movable range forming part (projection)
55 Connecting groove (groove)
58, 58A Electromagnetic shield 61 coil (first coil)
62 coil (second coil)
72 Damping part 73 Mounting part 81, 82 Elastic support part 90 Terminal drawer part 92, 92-1, 92-2 Coil guide part 93 Inclined part 112 Peripheral wall part 114 Bottom part 115 Opening part 116, 126 Vent hole 118 Step part 119, 119A Protrusion part 122 Top surface part 124 Hanging part 128 Pressing part 201 Communication part 202 Processing part 203 Drive control part 204, 205, 206 Vibration actuator 222, 242 Joint part 224, 244 Spring fixing part 522 Bobbin main body part (coil protection wall part)
522a Inner peripheral surface 526 Central flange (central wall)
526a Outer peripheral part 527, 528 Flange part 527a Upper end surface 528a Lower end surface 259 Positioning engagement part 589 Engagement part 802 Inner peripheral part 804 Deformation arm 806 Outer peripheral fixed part 807 Outer outer part 808 Positioning groove 1192, 1196 Protruding piece 1194, 1198 Vertical Piece

Claims (5)

A vibrating actuator with a movable body that has magnetic cores laminated on the front and back surfaces of a disk-shaped magnet and is supported by a pair of spiral springs to vibrate.
An annular protective wall portion arranged on the outer circumference of the movable body, and
An annular coil arranged on the outer periphery of the protective wall portion and
An annular magnetic shield portion arranged on the outer circumference of the annular coil,
It has a movable body, a protective wall portion, a coil, and a resin case for accommodating the magnetic shield portion.
The protective wall portion has a flange portion that protrudes from the outer periphery of the protective wall portion and is fixed to the resin case.
The flange portion has a protruding side portion at an end that is fitted into a positioning groove of the pair of spiral springs to regulate radial and circumferential movement of the pair of spiral springs.
Vibration actuator. The movable body has a spring stopper that is fixed to the magnetic core and supports the spiral spring at a central portion.
The vibration actuator according to claim 1 . The spring stopper is a weight.
The vibration actuator according to claim 2 . The spiral spring has a vibration damping member.
The vibration actuator according to any one of claims 1 to 3 . The vibration actuator according to any one of claims 1 to 4 is mounted.
Electronics.

Images