WO2016208156A1 - Lens drive device, camera module, and camera mounting device - Google Patents

Abstract

Provided is a lens drive device for which, before the device itself is assembled, the operation by an optical image stabilization (OIS) voice coil motor in a shake correcting actuator is confirmed, so as to reduce the production costs in case of an operation defect and to achieve good production. The device comprises: a mobile body configured so that a magnet is disposed in a frame-shaped retaining member in which an imaging module is installed; a fixed body which has a base member and which is configured so that a coil is disposed in the base member; a support part that tiltably supports the mobile body relative to the fixed body; and a main substrate to which the fixed body is fixed. The fixed body includes a coil substrate having a terminal to which the coil is connected, and the coil is connected to a circuit of the main substrate via the terminal of the coil substrate.

Description

Lens driving device, camera module, and camera mounting device

The present invention relates to a lens driving device having a shake correction function, a camera module, and a camera mounting device.

Generally, a small camera module is mounted on a mobile terminal such as a smartphone. Some cameras have an autofocus function that automatically adjusts the focus when shooting a subject and a shake correction function (OIS: Optical Image Stabilization) that corrects shake (vibration) that occurs during shooting to reduce image distortion. Many.

As a shake correction method, a module tilt method in which an imaging module is integrally tilted is known (for example, Patent Document 1). The imaging module is a module having a lens unit and an imaging element (for example, a CCD (Charge-Coupled Device)), and includes an auto-focusing actuator.

In the following, an autofocus actuator is referred to as an “AF actuator” and a shake correction actuator is referred to as an “OIS actuator”.

FIG. 1 is an external view showing an example of a conventional module tilt type camera module. FIG. 2 is an exploded perspective view showing an example of a conventional module tilt type camera module.

As shown in FIGS. 1 and 2, a conventional module tilt type camera module 2 includes a fixed body 21, a movable body 22, an elastic support section 23, an imaging module 24, and a shake detection section 25. The fixed body 21, the movable body 22, and the elastic support portion 23 constitute an OIS actuator.

The fixed body 21 includes a base member 211, a coil part 212, and a printed wiring board 213 for OIS. The coil unit 212 is disposed on the base member 211. The printed wiring board for OIS 213 supplies power to the coil unit 212 and outputs a detection signal from the shake detection unit 25 to the control unit.

The movable body 22 includes a yoke 221, a magnet part 222, a top plate 223, and a module guide 224. The yoke 221 and the magnet part 222 are disposed in the respective accommodating parts formed on the top plate 223. The module guide 224 is fixed to the top plate 223. The imaging module 24 is arranged and fixed in a space sandwiched between a set of module guides 224.

The elastic support portion 23 has a biaxial gimbal mechanism, and the movable body 22 (top plate 223) is fixed to the outer gimbal. The elastic support portion 23 is arranged in a state of floating in the approximate center of the base member 211 and is fixed by a stopper 231. The elastic support portion 23 supports the movable body 22 so as to be able to swing and rotate about the X axis and the Y axis orthogonal to the optical axis (Z axis), that is, to support the tiltable manner.

The shake detection unit 25 is composed of, for example, a gyro sensor that detects the angular velocity of the imaging module 24. The shake detection unit 25 is fixed to the side surface of the module guide 224 of the movable body 22. The detection signal of the shake detection unit 25 is output to the control unit via the OIS printed wiring board 213 which is the fixed body 21.

The coil unit 212 and the magnet unit 222 constitute an OIS voice coil motor (VCM). That is, when a current flows through the coil unit 212, Lorentz force is generated in the coil unit 212 due to the interaction between the magnetic field of the magnet unit 222 and the current flowing through the coil unit 212 (Fleming's left-hand rule). Since the coil portion 212 is fixed, a reaction force acts on the magnet portion 222. This reaction force becomes the driving force of the voice coil motor for OIS. The movable body 22 swings and rotates until the driving force of the voice coil motor for OIS and the restoring force (restoring force) of the elastic support portion 23 are balanced. Thereby, the deviation of the optical axis due to the shake is corrected, and the optical axis direction is kept constant.

By the way, in the above configuration, the OIS printed wiring board 213 may be a rigid flexible board (Rigid-flexible-printed-wiring-board or Rigid-flexible-printed-circuits, "rigid FPC"). By using a rigid FPC for the camera module 2, an OIS driver or the like that drives the OIS voice coil motor by supplying power to the coil portion 212 can be mounted on the rigid portion.

JP 2014-10287 A

Thus, as shown in Patent Document 1, in the conventional module tilt type camera module, the OIS printed wiring board 213 that supplies power to the coil unit 212 includes the coil unit 212 as a part of the fixed body 21. The base member 211 is attached.

Therefore, in order to confirm the operation by the voice coil motor for OIS such as the tilt operation angle of the actual imaging module by moving the movable body 22 by supplying power to the coil section 212, the camera module 2 must be assembled. I can't.

For this reason, if the desired tilt angle cannot be given to the movable body 22 due to the malfunction of the voice coil motor for OIS even if power is supplied to the coil section 212, the assembled camera module itself cannot be used. Further, in order to increase productivity in assembly, a shake detection unit 25 such as a gyro sensor may be mounted on the OIS printed circuit board 213 before the base member 211 is attached. In this case, if there is a malfunction of the voice coil motor for OIS, the shake detection unit 25 such as a gyro sensor which is an expensive part having no functional problem cannot be used together, and the production cost of the entire camera module increases. Therefore, there was a request to reduce production costs as much as possible.

In particular, in the configuration in which the printed wiring board for OIS 213 is a rigid FPC, the rigid FPC itself cannot be used, and furthermore, the OIS IC mounted on the rigid FPC cannot be used, which further increases the production cost.

The object of the present invention is to confirm the operation of the vibration correction actuator by the voice coil motor for OIS before assembling the device itself, and to reduce the production cost when there is a malfunction, and to produce it satisfactorily. A lens driving device, a camera module, and a camera mounting device.

One aspect of the lens driving device of the present invention is a lens driving device that performs shake correction by tilting an imaging module having a lens unit and an imaging element by a driving force of a voice coil motor having a coil unit and a magnet unit. A frame-shaped holding member on which the imaging module is placed; a movable body configured by disposing the magnet portion on the holding member; a base member; and the coil portion on the base member. A fixed body configured to be disposed; a support section which is disposed on the base member and supports the movable body to be tiltable with respect to the fixed body; and supplies power to the coil section to drive the voice coil motor. And a main board to which the fixed body is fixed, and the fixed body has a coil base having a terminal portion to which the coil portion is connected. Has the coil portion is connected to a circuit of the main board through the terminal part of the coil substrate, a configuration.

One aspect of the camera module of the present invention includes the above lens driving device, an imaging module having a lens unit and an imaging element, and bonded to the holding member, and a shake detection unit that detects shake of the imaging module. , Is adopted.

One aspect of the camera-mounted device of the present invention is a camera-mounted device that is an information device or a transport device, and has a configuration including the above-described camera module.

According to the present invention, before assembling the apparatus itself, the operation by the voice coil motor for OIS in the shake correction actuator can be confirmed, and the production cost can be reduced when there is a malfunction and the production can be performed well. Can do.

External view showing an example of a conventional module tilt type camera module An exploded perspective view showing an example of a conventional module tilt type camera module The figure which shows the smart phone which mounts the camera module which concerns on one embodiment of this invention External perspective view of camera module Exploded perspective view of camera module Sectional view along the Y direction of the camera module Sectional view along the X direction of the camera module The perspective view with which it uses for description of the attachment state of the position shift detection part in a camera module Partial perspective view for explaining the positional relationship between the misalignment detection unit and the yoke in the camera module Schematic diagram showing the flow of magnetic flux detected by the misalignment detector in the camera module Bottom view of yoke with elastic support The enlarged view which shows the attachment part of the gimbal attachment part and elastic support part in FIG. External perspective view of a camera module as a modification Exploded perspective view of a camera module as a modification The top view which shows the wiring pattern of the coil board | substrate in the camera module as a modification External perspective view of a camera module as another modified example The figure which shows the motor vehicle carrying the vehicle-mounted camera which concerns on one embodiment of this invention

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

FIG. 3 is a diagram showing a smartphone M equipped with the camera module 100 according to an embodiment of the present invention. 3A is a front view of the smartphone M, and FIG. 3B is a rear view of the smartphone M.

The smartphone M is equipped with a camera module 100 as a rear camera OC, for example. The camera module 100 includes an autofocus function and a shake correction function, and automatically performs focusing when shooting a subject, and corrects shake (vibration) generated during shooting to shoot an image without image blur. Can do. A module tilt method is adopted for the shake correction function of the camera module 100. The module tilt method has an advantage that no distortion occurs in the four corners of the screen.

FIG. 4 is an external perspective view of the camera module 100. FIG. 5 is an exploded perspective view of the camera module 100. FIG. 6 is a cross-sectional view of the camera module 100 along the Y direction. FIG. 7 is a cross-sectional view of the camera module 100 along the X direction. 6 and 7 are cross-sectional views of the OIS actuator A of the camera module 100. In each of the drawings, the magnetic circuit portion of the voice coil motor portion is particularly shown.

Here, description will be made using an orthogonal coordinate system (X, Y, Z) as shown in FIGS. In the camera module 100, when shooting is actually performed with the smartphone M, the X direction is the vertical direction (or the horizontal direction), the Y direction is the horizontal direction (or the vertical direction), and the Z direction (including the optical axis direction) is the front and back. It is mounted so as to be in the direction.

4 to 7, the camera module 100 includes a fixed body 11, a movable body 12, an elastic support section 13, an imaging module (driven section) 14, a shake detection section (gyro sensor) 15, a relay board 30, A misalignment detection unit (tilt detection unit) 40, a driver IC 60, a rigid flexible substrate (rigid flexible printed board, rigid FPC) 70, a coil substrate 80 for inspection, and the like are provided. The fixed body 11, the movable body 12, the elastic support portion 13, and the coil substrate 80 for inspection constitute an OIS actuator A. A lens driving device is configured by including the rigid FPC 70 in the configuration of the actuator A for OIS. In the OIS actuator A, the movable body 12 is moved using the driving force of the voice coil motor for OIS having the coil portion 112 and the magnet portion 122 to enable shake correction.

The fixed body 11 is fixed to the rigid FPC 70 and fixed together with the rigid FPC 70 so as not to move when mounted on the smartphone M. The fixed body 11 movably supports the movable body 12 via the elastic support portion 13. The fixed body 11 includes a base member 111, a coil portion 112, a skirt member (cover member) 114, a main body cover member (hereinafter referred to as “cover member”) 115, and a coil substrate 80.

As described above, the rigid FPC 70 includes a rigid portion 70a made of a hard material such as glass epoxy, and a bending material (polyimide) for a flexible printed circuit board (FPC) at a bending portion for incorporation or repeated bending. Is used (referred to as “flexible portion 70b”). Here, the rigid FPC 70 is configured by sticking a glass epoxy substrate on the FPC, and has a flexibility similar to that of the FPC and is a substrate having rigidity higher than that of the FPC.

A base member 111 is disposed on the rigid portion 70a. In the rigid part 70a, the driver IC 60, the shake detection part 15 mounted via the relay board 30, the AF driving connector 71, and the connection terminal parts 92 and 93 are located away from the base member 111. It is mounted on a circuit wired to the rigid portion 70a. The flexible part 70b has a connector connected to the main body side of the camera module 100, and has a power supply line (not shown) connected to the rigid part 70a. The flexible portion 70b is connected to the rigid portion 70a, and the power supply line is electrically connected to the power supply pad 81 via the rigid FPC 70.

The driver IC (drive control unit) 60 feeds power to the coil unit 112 to move the movable body 12 under the control of a control unit (not shown), that is, moves the imaging module 14 attached to the movable body 12 together with the movable body 12. To correct the tilt.

The shake detection unit 15 detects shake (movement) of an electronic device such as a smartphone on which the camera module 100 is mounted. The shake detection unit 15 includes, for example, a gyro sensor that detects an angular velocity of the camera module 100 (an electronic device such as a smartphone on which the camera module 100 is mounted). The shake detection unit 15 detects shake in at least two axes (X, Y) directions orthogonal to the optical axis O. Here, it is possible to detect a shake in the three-axis directions of XYZ.

The detection signal of the shake detection unit 15 is output to the control unit (not shown) via the relay board 30 and the rigid unit 70a. The control unit (not shown) controls the energization current of the coil unit 112 via the driver IC 60 based on this detection signal and the detection signal of the position shift detection unit 40 ( Hall elements 40a and 40b). The function of the control unit (not shown) may be executed by a driver IC or mounted on the rigid unit 70a. Moreover, you may make it utilize the control part mounted in the smart phone M via rigid FPC70. By detecting the tilt of the camera module 100 itself detected by the shake detection unit 15, a shake angle is detected, and a detection signal (hole output value) corresponding to this angle is detected by the misalignment detection unit 40, based on this. Thus, the current flowing through the coil section 112 is controlled via the driver IC 60, and the movable body 12 is moved to perform shake correction.

The base member 111 is a substantially rectangular member made of a metal material, and is disposed on the rigid portion 70a. When the base member 111 is made of metal, the strength is higher than that of a resin, so that the base member 111 can be thinned, and the camera module 100 can be reduced in height.

The base member 111 has a truncated pyramidal protrusion 111a for fixing the elastic support portion 13 at the center. In addition, the base member 111 has a protruding side portion 1111 that performs positioning when fixing the cover member 115 and the skirt member 114 at the central portion of the four sides constituting the peripheral portion. When the skirt member 114 and the cover member 115 are attached, the protruding side portion 1111 engages with the notches 1141 and 1151, respectively. Specifically, the skirt member 114 is fixedly positioned by being fitted around the outer peripheral edge of the base member 111 by engaging the notch portion 1141 with the protruding side portion 1111. The cover member 115 engages the notched portion 1151 with the protruding side portion 1111 of the base member 111 and is fitted on the outer peripheral surface of the skirt member 114. Accordingly, the cover member 115 is also positioned by the protruding side portion 1111 of the base member 111.

In the base member 111, pieces 111 b and 111 b having concave (U-shaped) notches 111 c and 111 c are erected at the center of two orthogonal sides of the four sides constituting the peripheral edge. . The misalignment detection unit 40 is disposed in the concave shape.

Specifically, the pieces 111b and 111b are provided upright from the one peripheral portion along the X direction and the one peripheral portion along the Y direction in the base member 111, respectively. In the pieces 111b and 111b, the positional deviation detection unit 40 is abutted against the bottoms of the concave cutouts 111c and 111c (see FIGS. 6 and 7). For example, the piece portion 111 b is formed by cutting and raising from the main body portion of the base member 111.

FIG. 8 is a perspective view for explaining the attachment state of the misalignment detection unit 40. In FIG. 8, for convenience, the mounting state of the Hall element 40 a that is the misalignment detection unit 40 in the fixed body 11 from which the movable body 12 and the imaging module 14 are omitted is shown.

As shown in FIG. 8, the misalignment detector 40 (Hall element 40a) in the notch 111c has the bottom surface 45 of the Hall element 40a abutted against the bottom 45 of the notch 111c. Thereby, the positioning in the Z direction is performed with respect to the misalignment detection unit 40 (Hall element 40a). Note that another Hall element 40b as the position shift detection unit 40 is positioned by being abutted against the bottom of the notch 111c in the same manner as the Hall element 40a.

As shown in FIG. 4 to FIG. 8, a coil substrate 80 is disposed on the base member 111. The coil substrate 80 is a substrate having circuits connected to input / output terminals of electronic components used in the actuator A in order to realize OIS.

The coil substrate 80 is a flexible printed circuit board having a rectangular shape having wiring connected to the coil unit 112 and the positional deviation detection unit 40. Note that the wiring of the coil substrate 80 is a wiring pattern including a power line of the coil unit 112 and the positional deviation detection unit 40 and a signal line of the positional deviation detection unit 40. Here, the coil substrate 80 includes a tilt terminal 112A to 112D as the coil part 112, two Hall elements 40a and 40b as the positional deviation detection part 40, and a connection terminal part composed of a total of 12 pins connected thereto. 82, 83. That is, the wiring pattern of the coil substrate 80 includes wirings connecting the tilt coils 112A to 112D, the Hall elements 40a and 40b, and the connection terminal portions 82 and 83. The connection terminal portions 82 and 83 are formed at portions extending laterally from a part of the outer periphery of the rectangular portion (main body substrate portion 801). The 12-pin terminals are a total of 4 pins with 2 input / output terminals for each of the opposing tilt coils 112A to 112D and a total of 8 pins of the hall elements 40a and 40b.

The coil substrate 80 includes a main body substrate portion 801 that is a rectangular frame-shaped portion, and Hall element attachment portions 802 and 803. An opening 80 a into which the protruding portion 111 a of the base member 111 is inserted is formed in the central portion of the main body substrate portion 801 that is a rectangular portion. The protruding portion 111a is disposed in a state of protruding upward from the coil substrate 80 through the opening 80a. The main body substrate portion 801 of the coil substrate 80 is provided with a power supply pad 81 connected to the coil portion 112 around the protruding portion 111a. The power supply pad 81 is for supplying power to the coil portion 112, and is connected to the connection terminal portions 82 and 83 as a circuit of the coil substrate 80. End portions of the coil portions 112 (tilt coils 112A to 112D) are soldered to the power supply pad 81. The connection terminal portions 82 and 83 extend outward (in this case, to the side of the base member 111) from a rectangular portion disposed on the base member 111 in the coil substrate 80. Thus, power can be supplied from the connection terminal portions 82 and 83 extended in the coil substrate 80 to the coil portion 112.

In addition, the misalignment detection unit 40 is mounted on the coil substrate 80. The positional deviation detection unit 40 detects the position of the movable body 12 attached to the fixed body 11 via the elastic support unit 13, that is, the position of the imaging module 14 in a non-contact manner.

The misregistration detection unit 40 is mounted on the hall element mounting portions 802 and 803 of the coil substrate 80 (see FIGS. 5 to 8).

Hall element attachment portions 802 and 803 are formed at positions corresponding to the pieces 111b and 111b of the base member 111. Specifically, the hall element mounting portions 802 and 803 extend upward from one outer edge portion along the Y direction and one outer edge portion along the X direction in the main body substrate portion 801 of the coil substrate 80, respectively. Is formed. The outer edge portion of the main body substrate portion 801 where the hall element attachment portions 802 and 803 are formed is different from a part of the outer periphery (outer edge portion) where the connection terminal portions 82 and 83 are formed (refer mainly to FIG. 5).

Between the Hall element mounting portions 802 and 803 and the main body substrate portion 801, slits 805 and 806 are provided along one outer edge portion along the Y direction and one outer edge portion along the X direction of the main body substrate portion 801, respectively. Is formed.

The pieces 111b and 111b of the base member 111 are inserted into the slits 805 and 806, respectively. FIG. 8 shows a state in which the piece 111b is inserted into the slit 805. The hall element attachment portions 802 and 803 are arranged on the outer surface sides of the pieces 111b and 111b inserted through the slits 805 and 806 of the coil substrate 80, respectively.

By inserting the pieces 111b and 111b into the slits 805 and 806, the position shift detection unit 40 ( Hall elements 40a and 40b described later) mounted on the Hall element mounting portions 802 and 803 is positioned. In addition, after that, the displacement detection unit 40 is abutted against the bottom of the notch 111c of the piece 111b, whereby the displacement detection unit 40 is positioned in the Z direction with higher accuracy.

The positional deviation detection unit 40 is fixed to the bottom of the abutted notch 111c by adhesion or the like. In addition, the position shift detection part 40 is good also as a structure fitted inside the notch part 111c. In that case, it is possible to perform positioning by restricting the movement of the misalignment detection unit 40 to one of X and Y which is a direction orthogonal to the Z direction as well as the Z direction. In addition, it is preferable that the Hall element mounting portions 802 and 803 are fixed to the corresponding pieces 111b and 111b by bonding or the like after the positional deviation detection unit 40 is positioned.

The positional deviation detection unit 40 senses the movement (rotation swing) of the movable body 12, that is, the imaging module 14, and detects the position of the movable body 12, that is, the imaging module 14, in the plane direction (XY direction) orthogonal to the optical axis. In other words, the positional deviation detection unit 40 senses the rotation and swing of the movable body 12, that is, the attitude of the imaging module 14, and detects the inclination with respect to the X axis and the Y axis. The misalignment detection unit 40 is connected to the connection terminal portions 82 and 83 via the wiring pattern of the coil substrate 80, that is, the wiring patterns of the Hall element mounting portions 802 and 803 and the substrate main body 801.

The coil substrate 80 can output and input signals from the misalignment detection unit 40 to the connection destination through the connection terminal units 82 and 83 as well as feeding power to the coil unit 112. Here, since the connection terminal portions 82 and 83 are connected to the connection terminal portions 92 and 93 of the rigid portion 70a, the detection signal of the positional deviation detection portion 40 is output to the circuit of the rigid portion 70a. The detection signal of the misalignment detection unit 40 is output to a control unit (not shown) via the circuit of the rigid unit 70a.

The positional deviation detection unit 40 is configured by, for example, a Hall element. Here, the misalignment detection unit 40 includes two Hall elements (first Hall element and second Hall element) 40a and 40b as magnetic position detection units.

The Hall elements 40a and 40b serving as the positional deviation detection unit 40 are arranged so as to be opposed to and separated from two pieces ( permanent magnets 122A and 122B) of the four permanent magnets 122A to 122D constituting the magnet unit 122, respectively. It is mounted on the coil substrate 80 (Hall element mounting portions 802, 803). Each Hall element 40a, 40b is arranged so that the leakage magnetic flux from the permanent magnets 122A, 122B crosses in the Z direction, for example. For example, each Hall element 40a, 40b is arranged so as to cross the direction of the flow of magnetic flux from the N pole to the S pole in the permanent magnets 122A, 122B. Specifically, the Hall elements 40a and 40b are mounted on the coil substrate 80 along the Y-axis and X-axis directions alongside the tilt coils 112A and 112B outside the tilt coils 112A and 112B that are the coil portions 112. Has been. Here, the Hall elements 40a and 40b are disposed in the notch 111c of the piece 111b so as to be opposed to the longitudinal center portions of the tilt coils 112A and 112B.

Since the permanent magnets 122A and 122B are respectively disposed in the tilt coils 112A and 112B, the hall elements 40a and 40b are configured to face the permanent magnets 122A and 122B, respectively. As described above, the Hall elements 40a and 40b are mounted on the outside of the tilt coils 112A and 112B on the coil substrate 80 side by side with the permanent magnets 122A and 122B disposed in the tilt coils 112A and 112B. Opposite.

More specifically, the one hall element 40a is disposed so as to be separated from the hall element 40a in the first direction X side orthogonal to the optical axis O (see FIG. 5), and the permanent magnet 122A facing the hall element 40a. By detecting the magnetic force, the first position associated with the movement (swing) in the first direction X is detected.

The other Hall element 40b is spaced apart from the Hall element 40b on the second direction Y side orthogonal to the optical axis O, and detects the magnetic force of the permanent magnet 122B facing the first Hall element 40b. The second position accompanying the movement (swing) in the direction Y of 2 is detected.

The Hall element 40a can detect the amount of movement of the permanent magnet 122A in the X-axis direction, and the Hall element 40b can detect the amount of movement of the permanent magnet 122B in the Y-axis direction. In other words, the Hall elements 40a and 40b detect movement amounts of the imaging module in the X-axis direction and the Y-axis direction, that is, movement on a plane orthogonal to the optical axis.

Thereby, the control unit shakes the imaging module 14 based on the shake of the stationary body 11 (camera module 100 itself) detected by the shake detection unit (gyro sensor) 15 and the detection position by the Hall elements 40a and 40b. Power is supplied to the coil unit 112 via the driver IC 60 that corrects the above. Thereby, the movable body 12 (imaging module 14) moves and moves to a position corresponding to the movement amount of the imaging module 14 in the X-axis direction and the Y-axis direction, and the shake is corrected.

In addition, since the Hall elements 40a and 40b (the positional deviation detection unit 40) can detect the amount of movement of the imaging module 14 in the X-axis direction and the Y-axis direction, they are offset by the weight of the imaging module 14 (self-weight) or movable. An offset due to the reaction force of the FPC of the imaging module 14 when the body 12 is attached to the fixed body 11 can be detected.

Thereby, the camera module 100 can accurately position the imaging module 14 without tilting by detecting and correcting the offset position of the imaging module 14 using the misalignment detection unit 40. In other words, the control unit (not shown) is movable based on the detection signal of the misalignment detection unit 40 when correcting the shake (angular shake) of the camera module 100 itself corresponding to the detection signal of the shake detection unit 15. The energization current of the coil unit 112 is controlled (so-called feedback control) so that the body 12 and the imaging module 14 return to the reference position.

The coil part 112 is composed of four tilt coils 112A to 112D, and is arranged on the coil substrate 80 so as to surround the protruding part 111a. Here, the tilt coils 112A to 112D are arranged on the coil substrate 80 at positions sandwiched between the power supply pads 81, respectively. The coil portion 112 (tilt coils 112A to 112D) is disposed with the coil winding axis facing the base member 111 and the yoke (holding member) 120 in the opposing direction (here, the Z direction). The tilt coils 112A to 112D are connected to the respective power supply pads 81 located on both sides of each of the tilt coils 112A to 112D by soldering. In this way, the tilt coils 112 to 112D are supplied with power via the power supply pad 81.

The tilt coils 112A and 112C face each other in the X direction, and are used when the movable body 12 is rotated and oscillated (θY) about the Y axis. The tilt coils 112B and 112D are opposed to each other in the Y direction, and are used when the movable body 12 is rotated and swung (θX) about the X axis.

The skirt member 114 is a member in which four wall bodies 114b are connected in a rectangular frame shape, and has a receiving port 114a for the imaging module 14. The skirt member 114 has a notch 1141 at a position corresponding to the protruding side 1111 of the base member 111, that is, at the center of the lower end of each wall body 114 b of the skirt member 114. The upper portion of each wall body 114b of the skirt member 114 has a rectangular frame-shaped restricting portion 114d formed to slightly protrude inward from each upper portion, and the restricting portion 114d is inside the frame shape, that is, the skirt member 114. The movable body 12 disposed in the receiving port 114a is prevented from being excessively inclined.

The skirt member 114 is fixed by being fitted around the outer periphery of the base member 111 after the movable body 12 is attached to the base member 111 via the elastic support portion 13. The movable body 12 is sandwiched between the base member 111 and the skirt member 114.

The cover member 115 is a covered rectangular cylindrical member having an opening (opening) 115a in the lid portion on the upper surface. The cover member 115 makes the lens part 141 of the imaging module 14 face the outside through the opening 115a. The cover member 115 has a cutout portion 1151 formed at a position corresponding to the protruding side portion 1111 of the base member 111 at the lower end portion of the cylindrical peripheral wall portion.

After the imaging module 14 is mounted on the OIS actuator A, the cover member 115 is externally fitted to the skirt member 114, and the notch 1151 is engaged with the protruding side 1111 of the base member 111, thereby causing the base member 111. Fixed to. On one side surface of the cover member 115, an outlet 115b for drawing the printed wiring board 143 for the imaging module to the outside is formed.

The movable body 12 swings and rotates about the X axis and the Y axis with respect to the fixed body 11. The movable body 12 includes a yoke (holding member) 120, a magnet portion 122, and a pair of module guides 126. When mounting the imaging module 14 on the OIS actuator A, the yoke 120 directly holds the imaging module 14. The imaging module 14 is bonded to the upper surface of the yoke 120 by, for example, a double-sided tape or a resin adhesive. With this configuration, the imaging module 14 can be positioned and fixed to the yoke 120 with high accuracy by using a jig without using a positioning member such as the module guide described in Patent Document 1.

The yoke 120 is a rectangular frame-shaped member formed of a magnetic material, and is provided with a rectangular frame-shaped yoke main body (holding unit main body) 121 and a frame-shaped inner side of the yoke main body 121 and mounted thereon. And a flat frame-shaped holding frame portion 1211 for fixing the module 14.

The yoke body 121 holds the magnet part 122. The yoke body 121 has a flat frame-shaped upper plate portion 121a in which four flat plates to which the magnet portion 122 is fixed are connected to a lower surface in a rectangular shape. The yoke body 121 is an outer hanging portion formed so as to project downward and hang down along the outer peripheral edge portion of the upper plate portion 121a (specifically, the outer edge portion of each flat plate constituting the upper plate portion 121a). 121b. Further, the yoke body 121 is formed so as to protrude downward and hang down along the inner peripheral edge of the upper plate 121a (specifically, the inner edge of each flat plate constituting the upper plate 121a). It has a hanging part 121c. That is, the cross-sectional shape of one side portion of the frame-shaped yoke body 121 is a concave shape that opens to the base member 111 side, that is, a “U” shape that opens downward. The upper plate portion 121 a that is the bottom surface in the concave shape is located at a position farther from the base member 111 than the holding frame portion 1211. Further, the outer peripheral edge portion of the holding frame portion 1211 is joined to the lower end portion of the inner hanging portion 121 c of the yoke body 121. The bottom surface of the imaging module 14 is fixed to the upper surface of the holding frame portion 1211 (part of the upper surface of the yoke 120), more specifically, to the module mounting portion 1211a of the holding frame portion 1211 by a double-sided tape or a resin adhesive.

The yoke body 121 has a notch 1213 in one outer droop 121b along the Y direction and a notch 1214 in one outer droop 121b along the X direction. In the notches 1213 and 1214, Hall elements 40a and 40b (see FIGS. 6 to 8) of the misalignment detector 40 positioned by the piece 111b standing from the base member 111 are arranged.

FIG. 9 is a partial perspective view for explaining the positional relationship between the misalignment detection unit and the yoke. For convenience, the camera module 100 shown in FIG. 9 is shown with the imaging module 14 and the cover member 115 removed.

As shown in FIGS. 5 to 9, the notches 1213 and 1214 open downward in the central portions of one outer hanging portion 121b along the Y direction and one outer hanging portion 121b along the X direction. It is cut out and formed.

By disposing the pieces 111b and 111b in the notches 1213 and 1214, the displacement detectors 40 ( Hall elements 40a and 40b) fixed to the pieces 111b are arranged at positions positioned respectively. 6 and 7 show a state in which the position shift detection unit 40 ( Hall elements 40a and 40b) is located in the notches 1213 and 1214 together with the pieces 111b and 111b.

FIG. 10 is a schematic diagram showing the flow of magnetic flux detected by the misalignment detector 40. FIG. 10 is an enlarged view schematically showing a peripheral portion to which the hall element 40a is attached in FIG.

As shown in FIG. 10, a notch 1213 is formed in the yoke main body 121, and a hall element 40 a that is the misregistration detection unit 40 is disposed in the notch 1213, so that the magnet unit 122 is provided in the misregistration detection unit 40. The leakage magnetic flux from the permanent magnet 122A is efficiently traversed. Since the positional relationship of the Hall element 40b with respect to the notch 1214 detects the flow of magnetic flux similarly to the Hall element 40a, the description thereof is omitted. Thereby, the positional deviation detection unit 40 can detect the inclination of the movable body 12 with respect to the X axis or the Y axis, that is, a so-called positional deviation from the reference position, based on a change in leakage magnetic flux from the permanent magnets 122A and 122B.

A step is formed between the holding frame portion 1211 and the upper plate portion 121a to bring the holding frame portion 1211 closer to the base member 111 than the upper plate portion 121a, and a concave portion is formed at the center of the entire yoke 120. The imaging module 14 is fixed in the recess. The yoke 120 prevents magnetic interference of the magnetic circuit having the magnet part 122 and the coil part 112 with respect to the imaging module 14.

The holding frame portion 1211 includes a module attachment portion 1211a and a gimbal attachment portion 1211b inside the module attachment portion 1211a.

The module mounting portion 1211a is provided continuously to the inner hanging portion 121c of the yoke body 121, and is here formed in a rectangular frame plate shape orthogonal to the Z-axis direction including the optical axis. Inside the module mounting portion 1211a, there is a step with respect to the module mounting portion 1211a, and a rectangular frame plate-like gimbal mounting portion 1211b is provided.

Specifically, the gimbal mounting portion 1211b is one step lower than the holding frame portion 1211a on the base member 111 side, and protrudes radially inward from the inner periphery of the holding frame portion 1211a toward the center of the holding frame portion 1211a. Is formed. The elastic support portion 13 is attached to the lower surface of the gimbal attachment portion 1211b (see FIGS. 5 to 7).

As shown in FIG. 5, the magnet unit 122 is composed of four rectangular parallelepiped permanent magnets 122A to 122D corresponding to the tilt coils 112A to 112D. An electromagnet may be used instead of the permanent magnet. The size of the permanent magnets 122A to 122D is set to be within the tilt coils 112A to 112D.

The permanent magnets 122A to 122D are arranged on the lower surface of each flat plate of the yoke 120 so that the magnetization direction is the Z direction, and fixed by, for example, adhesion (see FIGS. 5 to 7 and 11).

The permanent magnets 122A to 122D are located between the inner hanging part 121c and the outer hanging part 121b of the yoke 120. Here, the permanent magnets 122A to 122D are opposed to each other at a position where a gap is provided for each of the inner hanging part 121c and the outer hanging part 121b.

The coil part 112 is located between the magnet part 122 and the yoke 120 (specifically, the yoke body 121) (see FIGS. 5 and 6). The magnet part 122 is located on the winding axis of the winding of the coil part 112. The magnet portion 122 and the coil portion 112 are formed by opening the central portion of the coil portion 112 along the bonding direction of the imaging module 14 in the yoke 120 and the base member 111, and the magnet portion 122 protrudes from the central portion of the coil portion 112. Are arranged as follows.

Further, the magnet part 122 and the coil part 112, that is, the magnetic circuit part having these parts are located on the outer peripheral side (specifically, in the XY direction) of the lower end part of the imaging module 14 and the holding frame part 1211. That is, the magnetic circuit unit including the magnet unit 122 and the coil unit 112 is not disposed directly below the lower end portion of the imaging module 14 and the holding frame unit 1211. That is, the magnet portion 122 (permanent magnets 122A to 122D) and the coil portion 112 (tilt coils 112A to 112D) are arranged on the outer peripheral side in the XY direction between the lower end portion of the imaging module 14 and the holding frame portion 1211 of the yoke 120. 111.

The elastic support portion 13 is composed of a rectangular member (so-called gimbal spring) having a biaxial gimbal mechanism. FIG. 11 is a diagram for explaining the elastic support portion 13 and is a bottom view of the yoke 120 to which the elastic support portion 13 is attached.

As shown in FIG. 11, the elastic support portion 13 includes a central portion 13 a and an outer gimbal 13 c that is connected to the central portion 13 a with an inner gimbal 13 b interposed therebetween and that rotates and swings around the X axis and the Y axis. In FIG. 11, the gimbal spring that is the elastic support portion 13 is indicated by hatching in order to differentiate it from other constituent members. The gimbal spring has a rectangular surface shape and is thin in the Z direction.

As shown in FIG. 11, the central portion 13a has a rectangular shape, and the inner gimbal 13b has an intricate curved shape. The inner gimbals 13b are respectively joined to the central portion 13a at both ends of the curved shape, and are joined to the outer gimbals 13c and the outer gimbals 13c extending from the central portion 13a by two on one side along the Y axis. 13c and a gimbal shaft 13x extending two on each side along the X axis. Here, the outer gimbal 13c has two elongated plates, and is joined to the back surface of the gimbal mounting portion 1211b. The outer gimbal 13c is opposed to each other at the central portion 13a, and outside the pair of side portions (gimbal shaft 13x) extending along the X direction, in parallel with the respective side portions (gimbal shaft 13y). Has been placed. The central part of the outer gimbal 13c is joined to the gimbal shaft 13x which is one end of the inner gimbal 13b. The other end of the inner gimbal 13b (the end of the gimbal shaft 13y) is joined to the central portion 13a.

The central portion 13a of the elastic support portion 13 is in contact with the protruding portion 111a of the base member 111 and is bonded or welded. Thereby, in the elastic support part 13, as shown in FIG. 7, the part of the outer peripheral side from the center part 13a will be in the state located apart from the upper surface of the base member 111 in the perpendicular direction at predetermined intervals. The predetermined interval is a movable range when the elastic support portion 13 is rotated around the central axis in the X direction and the Y direction. As shown in FIG. 11, the outer gimbal 13 c of the elastic support portion 13 is bonded or welded to a pair of parallel side portions on the lower surface of the holding frame portion 1211 of the yoke 120. As a result, the movable body 12 is arranged in a state of floating in the approximate center of the base member 111, and can swing and rotate about the X axis and the Y axis. The movable body 12 is in a state of being supported so as to be tiltable in the X-axis and Y-axis directions around the central portion. Since the elastic support portion 13 is fixed to the base member 111 by adhesion, a locking member such as the stopper described in Patent Document 1 is not necessary. The elastic support portion 13 is attached to the lower surface of the gimbal attachment portion 1211b at a position lower than the module attachment portion 1211a in the holding frame portion 1211 where the imaging module 14 is bonded to the upper surface (module attachment portion 1211a) with the outer gimbal 13c. ing. The length of the elastic support portion 13 and the imaging module 14 that are separated in the Z direction is substantially equal to the thickness of the holding frame portion 1211. Here, in addition to the thicknesses of the module attachment portion 1211a and the gimbal attachment portion 1211b that form the holding frame portion 1211, only the length of the step portion between the two is provided. Thereby, the length of the camera module 100 itself in the Z direction can be shortened, that is, the height of the camera module 100 can be reduced.

As shown in FIGS. 5 and 7, the gimbal spring that is the elastic support portion 13 of this embodiment is attached to the gimbal attachment portion 1211 b that is one step lower than the module attachment portion 1211 a in the holding frame portion 1211 at a location along the X-axis direction. Yes. On the other hand, the gimbal spring which is the elastic support portion 13 is not attached to the yoke 120 having the holding frame portion 1211 at the portion along the Y direction, as shown in FIGS.

FIG. 12 is an enlarged view showing the positional relationship between the gimbal mounting portion 1211b and the gimbal spring as the elastic support portion 13 in FIG.

In the case of the elastic support portion 13 shown in the present embodiment, when the movable body 12 rotates and swings around the X axis, the bottom surface 14a of the imaging module 14 has a gimbal shaft 13y along the Y axis of the elastic support portion 13 (FIG. 11). And (refer to FIG. 12) approach one (specifically, the end portion 13 y 1 of the gimbal shaft 13 y). That is, the swinging rotation range of the movable body 12 (indicated by a thick arrow in FIG. 12) is limited by the separation distance L between the imaging module 14 and the elastic support portion 13.

In the present embodiment, the gimbal attachment portion 1211b of the yoke 120 is formed one step lower than the module attachment portion 1211a, and the separation distance between the imaging module 14 and the elastic support portion 13 is the amount of the step formed lower. The distance is increased by the distance L1 shown in FIG. Thereby, the movable range of the movable body 12 becomes large compared with the case where the imaging module 14 is fixed to the gimbal attachment part 1211b.

The pair of module guides 126 are provided upright from the yoke 120. The module guides 126 are disposed to face both side surfaces of the imaging module 14 attached to the holding frame portion 1211. Accordingly, the module guide 126 serves as a guide when the imaging module 14 is placed and fixed on the holding frame portion 1211 of the yoke 120. The pair of module guides 126 are also fixed to both side surfaces of the imaging module 14 facing each other via an adhesive or the like. Therefore, the imaging module 14 is accurately attached to the movable body 12, and the reliability can be improved. The module guide 126 protrudes upward from the receiving port 114 a of the skirt member 114 together with the imaging module 14.

5 and 7, the imaging module 14 includes a lens unit 141, an imaging element (not shown), an AF actuator 142, and an imaging module printed wiring board 143.

The imaging element (not shown) is configured by, for example, a charge coupled device (CCD) image sensor, a complementary metal oxide semiconductor (CMOS) image sensor, or the like. The imaging element (not shown) is mounted on the imaging module printed wiring board 143. The image sensor (not shown) captures the subject image formed by the lens unit 141.

The AF actuator 142 has, for example, an AF voice coil motor, and moves the lens unit 141 in the optical axis direction by using the driving force of the AF voice coil motor. A known technique can be applied to the AF actuator 142.

Here, the printed wiring board 143 for the imaging module is configured by a flexible printed circuit board having flexibility. The imaging module printed wiring board 143 has a power line (not shown) for supplying power to a coil portion (not shown) of the AF actuator 142 and a signal line (not shown) for a video signal output from the imaging device. . When the imaging module 14 is mounted on the OIS actuator A, the printed wiring board 143 for the imaging module gets over the skirt member 114 from the inside of the skirt member 114 as shown in FIG. It is pulled out through 115b. In detail, the printed wiring board 143 for the imaging module extends upward from the lower surface of the imaging module 14 and is bent so as to extend toward the outside of the skirt portion above the skirt member 114 at a predetermined interval. The cover member 115 extends outward from the outlet 115b. The drawn-out printed circuit board for imaging module 143 is connected to the rigid portion 70 a of the fixed body 11. As described above, the printed wiring board 143 for the imaging module is configured to be provided on the movable body 12, but does not hinder the movement of the movable body 12 because it has flexibility. The imaging module printed wiring board 143 may be branched in the middle, and separate connectors may be attached to the power supply line and the video signal signal line.

In the OIS actuator A, the magnetic circuit portion having the magnet portion 122 (permanent magnets 122A to 122D) and the coil portion 112 (tilt coils 112A to 112D) is provided on the lower end portion of the imaging module 14 and the holding frame portion 1211 of the yoke 120. On the other hand, it is arranged on the base member 111 on the outer peripheral side in the XY direction.

The magnetic circuit unit is arranged at a position where a part of the magnetic circuit unit overlaps the lower end of the imaging module 14 and the holding frame unit 1211 of the yoke 120 in the XY direction. That is, one of the magnet part 122 and the coil part 112 (here, the magnet part 122) is arranged at a position where it overlaps in the X direction and the Y direction. Here, the permanent magnets 122A to 122D constituting the magnet portion 122 are positioned above the tilt coils 112A to 112D constituting the coil portion 112 and partially inserted inside the tilt coils 112A to 112D. Arrange in a state. As a result, the permanent magnets 122A to 122D are arranged along the winding axis direction (Z direction) of the respective tilt coils 112A to 112D above the corresponding tilt coils 112A to 112D.

In the voice coil motor for OIS having the magnet part 122 and the coil part 112 arranged in this way, in the initial state where no current flows through the coil part 112, the imaging module 14 (movable body 12) has an optical axis in the Z direction. Held in a neutral position. Here, when the movable body 12 is attached to the fixed body 11, when the imaging module 14 (movable body 12) is offset from the neutral position due to its own weight, the offset position detected by the misalignment detection unit 40 is used. Thus, the position of the movable body 12 is corrected via the driver IC 60, and the optical axis is positioned at a neutral position that coincides with the Z direction.

When a current flows in the coil part 112, a Lorentz force in the Z direction is generated in the coil part 112 due to the interaction between the magnetic field of the magnet part 122 and the current flowing in the coil part 112 (Fleming's left-hand rule). Since the coil portion 112 is fixed, a reaction force acts on the magnet portion 122 which is the movable body 12. This reaction force becomes the driving force of the voice coil motor for OIS.

Specifically, when currents in opposite directions are passed through the tilt coils 112A and 112C facing each other in the X-axis direction, forces opposite to each other act in the Z direction on the permanent magnets 122A and 122C. Therefore, the movable body 12 including the imaging module 14 swings and rotates about the Y axis with the central portion 13a of the elastic support portion 13 as a fulcrum. Similarly, when currents in opposite directions are passed through the tilt coils 112B and 112D facing each other in the Y-axis direction, the movable body 12 including the imaging module 14 is centered around the X-axis with the central portion 13a of the elastic support portion 13 as a fulcrum. Oscillate and rotate. The movable body 12 swings and rotates until the driving force of the OIS voice coil motor (the force acting on the magnet portion 122) and the restoring force of the elastic support portion 13 are balanced.

At this time, the energization current of the coil unit 112 is controlled based on the detection result of the misalignment detection unit 40 so that the shake of the imaging module 14 is offset by the swinging rotation of the movable body 12. Thereby, the deviation of the optical axis due to the shake is corrected, and the optical axis direction is kept constant.

Thus, the OIS actuator A including the fixed body 11, the movable body 12, and the elastic support portion 13 is mounted on the rigid FPC 70 via the coil substrate 80. Thereby, after assembling the OIS actuator A, before mounting and connecting to the rigid FPC 70, the operation of the actuator A can be confirmed via the connection terminal portions 82 and 83 of the coil substrate 80. It is possible to perform evaluation (operation check) with the actuator A alone by connecting to a simple inspection / evaluation apparatus. Therefore, when there is a malfunction, this is not used, and only the good product that has passed the evaluation can be mounted on the rigid FPC 70 to manufacture the camera module 100. Accordingly, it is possible to prevent the rigid FPC 70, which is an expensive component such as a gyro sensor and the driver IC 60 as the shake detection unit 15 from being mounted alone, and cannot be used together with a defective OIS actuator. . After that, by connecting the connection terminal portions 82 and 83 of the coil substrate 80 to the connection terminal portions 92 and 93 of the rigid FPC 70, the actuator A and the rigid FPC 70 are connected to each other, so that a highly reliable camera module 100 can be produced. It can be manufactured while reducing.

In the present embodiment, the fixed body 11 is provided upright from the coil substrate 80 side, and the first direction X and the second direction Y with respect to the first coil 112A and the second coil 112B, respectively. Have side portions 111b and 111b facing sideways. The pieces 111b and 111b have a recess (notch 111c) that engages and contacts the first Hall element 40a and the second Hall element 40b and positions at least in the optical axis direction. In other words, the misalignment detection unit 40 is erected from the base member 111 of the fixed body 11 outside the coil unit 112, and is disposed on the pieces 111 b and 111 b facing the coil unit 112.

The misalignment detection unit 40 abuts against the notch 111c in the notch 111c of the piece 111b, thereby causing a magnetic flux formed between the coil 112 and the magnet 122 in the coil 112 to flow. It is positioned at a position where it can be detected efficiently. In particular, Hall elements 40a and 40b, which are misalignment detection units 40, are abutted and fixed in concave notches 111c that are notched upward and have a base with a predetermined height from the base member 111.

As a result, even if there is a component tolerance or assembly tolerance, positioning in the Z direction, which is important for detecting the position in which the direction of the magnetic flux changes due to movement, in particular, the rotational direction of the magnet part 122 with respect to the coil part 112, can be This can be performed on the detection unit 40, and high-output position detection can be performed. That is, the mounting positions of the Hall elements 40a and 40b do not vary depending on the component accuracy, thereby reducing variations in Hall output characteristics.

Further, in the structure in which the misalignment detection unit 40 ( Hall elements 40a and 40b) is arranged on the side of the camera module 100, that is, outside the coil unit 112, the misalignment detection unit 40 needs to be attached to the wall body 114b of the skirt member 114. There is no. When attaching the displacement detector 40 ( Hall elements 40a, 40b) to the skirt member 114, it is conceivable to make a hole in the wall body 114b of the skirt member 114 and insert the displacement detector 40 from the outside. In the case of this configuration, the wiring for the misregistration detection unit 40, for example, the FPC is inevitably exposed on the outer surface of the skirt member 114. For this reason, when assembling the camera modules 100 and 100A, especially when connecting the actuator A to the rigid FPC 70, there is a possibility that the FPC may be damaged by being touched and disconnected.

In this embodiment, since the wiring for the misregistration detection unit 40, for example, the FPC is wired in the skirt member 114, it is possible to prevent disconnection without contact with foreign matter.

Further, it is not necessary to attach the FPC to the wall body 114b of the skirt member 114, specifically, the side surface of the skirt member 114, and the outer shape of the camera module does not increase by the FPC thickness.

In this embodiment, the elastic support portion (support portion) 13 supports the movable body 12 so as to be tiltable with respect to the fixed body 11 by elastic deformation. The frame-shaped holding member (yoke) 120 is disposed inside the frame-shaped module mounting portion 1211a on which the imaging module 14 is mounted, and the module mounting portion 1211a, and has a step surface lower than the module mounting portion 1211a. And a support part attachment part (gimbal attachment part) 1211b to which the is attached.

Specifically, the gimbal mounting portion 1211b of the yoke 120 is formed one step lower than the holding frame portion 1211a, and the separation distance between the imaging module 14 and the elastic support portion 13 is increased by the level difference formed one step lower. (Refer to distance L in FIG. 12). That is, the bottom portion of the imaging module 14 is disposed at a position spaced in advance from the elastic support portion 13 that is a gimbal. Thereby, compared with the case where the imaging module 14 is fixed to the gimbal mounting portion 1211b, the imaging module 14 is elastically supported even when the movable body 12 is oscillated so as to be twisted about the X axis. No contact is made with the gimbal spring 13 (specifically, the end portion 13y1 of the gimbal shaft 13y extending in the Y direction). Therefore, the movable range of the movable body 12 can be increased as compared with a camera module having a configuration in which the imaging module 14 is fixed to the gimbal mounting portion 1211b.

As in the present embodiment, in the structure using the gimbal as the elastic support portion 13, the movable body 12 attached to the outer edge side can be swung around the center portion of the square shape in plan view fixed to the fixed body 11. I support it. Thereby, for example, when it is desired to increase the size of the gimbal which is the elastic support portion 13 (the size of the gimbal in the X direction and the Y direction), the larger the size when the movable body 12 is swung, the more the gimbal itself (details) In this case, the distance that the outer edge portion located on the swinging direction side approaches the imaging module 14 is shortened and the movable range is narrowed. The collision between the gimbal spring and the imaging module 14 also causes spring bending.

On the other hand, according to the camera module 100 of the present embodiment or the lens driving device included in the camera module 100, the imaging module 14 and the gimbal itself are previously separated in the swing direction, that is, in the height direction. Can be placed. Thereby, the gimbal can be enlarged, the camera module itself can be enlarged, and the degree of freedom can be given to those designs.

In the camera module 100 of the present embodiment, the number of terminals of the coil substrate 80 is twelve. However, the number is not limited to this, and any number corresponding to the input / output terminals of components used in the OIS actuator A can be used. Such a number may be used.

In the camera module 100, the Hall elements 40a and 40b serving as the positional deviation detection unit 40 are provided on the OIS actuator A side, but may be provided on the rigid FPC 70 side.

(Modification)
13 is an external perspective view showing a modification of the camera module according to the embodiment of the present invention, FIG. 14 is an exploded perspective view showing a modification of the camera module, and FIG. It is a top view which shows an example of the wiring pattern of 80 A of coil boards in a module.

The camera module 100A shown in FIGS. 13 and 14 is different from the camera module 100 in that the misalignment detection unit 40 is provided not on the OIS actuator A side but on the rigid FPC 70 side. Along with this, the number of terminals ( connection terminal portions 82A, 83A) of the coil substrate 80A is also changed corresponding to the number of terminals of the actuator A for OIS, and here, the coil substrate 80A having four-terminal wiring is obtained. In addition, the camera module 100 </ b> A has the same operational effects as the camera module 100. Thereby, about the camera module 100A of a modification, the same code | symbol same name is attached | subjected about the component similar to the module 100, and description is abbreviate | omitted as having the same effect.

As shown in FIG. 14, the Hall elements 40a and 40b are provided on the rigid FPC 70A side to which the OIS actuator 1A is attached. The rigid FPC 70A includes a rigid portion 70Aa and a flexible portion 70Ab. In the rigid part 70Aa, like the rigid part 70A, the driver IC 60, the shake detection part 15 mounted via the relay substrate 30, the AF driving connector 71, and the connection terminal parts 92A and 93A are included in the rigid part. It is mounted on a circuit wired to 70Aa. The connection terminal portions 92A and 93A are arranged corresponding to the connection terminal portions 82A and 83A, and the corresponding terminals are connected to each other.

Specifically, in the rigid portion 70Aa of the rigid FPC 70A, the Hall elements 40a and 40b are arranged so as to be exposed in the region of the upper base member 111A.

In the base member 111A and the coil substrate 80A placed on the rigid FPC 70A, cutout portions 119a and 119b penetrating each other are formed at positions overlapping the positions of the hall elements 40a and 40b exposed on the rigid FPC 70A. .

The Hall elements 40a and 40b are exposed on the coil substrate 80A placed on the base member 111 through these notches 119a and 119b, and two pieces of the four permanent magnets 122A to 122D in the magnet portion 122 are exposed. And spaced apart from each other. In the camera module 100A, the Hall elements 40a and 40b mounted on the rigid FPC 70A are arranged so as to cross the directions from the N pole to the S pole in the permanent magnets 122B and 122C, respectively.

Specifically, the Hall elements 40a and 40b are arranged on the center (optical axis) side of the tilt coils 112C and 112D along the Y-axis and X-axis directions of the coil portion 112. Since the permanent magnets 122B and 122C are respectively disposed in the tilt coils 112B and 112C, the hall elements 40a and 40b are configured to face the permanent magnets 122C and 122D, respectively. As described above, in the camera module 100A, the Hall elements 40a and 40b are arranged below the imaging module 14, that is, at a position close to the imaging module 14, so that a more accurate displacement can be detected.

The functions of the hall elements 40a and 40b are the same as those of the camera module 100. That is, one Hall element 40a is arranged on the front side in the first direction (front-rear direction) X with respect to the optical axis O, and faces the outside in the case where the left side in the X direction in FIG. By detecting the magnetic force of the permanent magnet 122C, the first position accompanying the movement (swing) in the first direction (front-rear direction) X is detected. The other Hall element 40b is arranged on the left side in the second direction (left-right direction) Y with respect to the optical axis O, and detects the magnetic force of the permanent magnet 122B facing it in the second direction (left-right direction). (Direction) The second position accompanying the movement (swing) of Y is detected.

On the other hand, the coil substrate 80A is an FPC, and unlike the coil substrate 80, the Hall elements 40a and 40b are not mounted. In the coil substrate 80A, as shown in FIG. 15, the power supply pads 81 are wired in the air at both ends of each of the tilt coils 112A to 112D. Further, the wirings printed on the coil substrate 80A (the wirings 85a and 85b among the wirings 85) are routed so as to overlap with the aerial wirings at the X portion, thereby realizing a single-sided FPC structure. In the FPC wiring 85 of the coil substrate 80A, the current flowing from one terminal of the connection terminal portions 82A and 83A passes through the tilt coils facing each other and flows from the other terminal of the connection terminal portions 82A and 83A. . By routing the wiring on the FPC 70 as described above, the direction of the magnets 122A to 122D, the direction of the tilt coils 112A to 112D, etc. are not changed compared to a 12-terminal module, and the cost is reduced without using a double-sided FPC. Down and space saving are achieved.

In addition, in the camera module 100A of the modified example, when the OIS actuator 1A is evaluated as a single unit using an inspection evaluation apparatus, the OIS actuator 1A is not provided with the hall elements 40a and 40b. For this reason, when the output inspection of the Hall elements 40a and 40b is performed, the Hall element is provided on the inspection / evaluation apparatus side so that the output of the Hall element is obtained and the operation using the output of the Hall element is also inspected and evaluated. can do.

Further, in the camera module 100 of the present embodiment and the camera module 100A as a modification, the main body cover member 115 covers the skirt member 114 of the fixed body 11 that covers the movable body 12 together with the movable body 12. Not limited to.

For example, like a camera module 100B shown in FIG. 16, a main body having a laminated cover member 116 and a wiring board cover member 117 placed on the skirt member 114 instead of the main body cover member 115 in the camera module 100 of the first embodiment. You may make it have the cover member 115B. The laminated cover member 116 covers the movable body 12 and the imaging module 14 attached to the movable body 12 together with the skirt member 114 so as to be rotatable and swingable. The laminated cover member 116 has a function similar to that of the main body cover member 115, such as restricting upward movement of the imaging module 14A configured similarly to the imaging module 14 to movement within a predetermined range. In FIG. 16, the AF driving connector 71 (see FIG. 5) provided on the rigid FPC 70 of the fixed body 11 is omitted. In addition, regarding the camera module 100B illustrated in FIG. 16, the same components as those of the camera module 100 are denoted by the same reference numerals, and description thereof is omitted.

The multilayer cover member 116 has an opening (not shown) through which the imaging module printed wiring board 143 is led out. The imaging module printed wiring board 143 led out from the opening is covered by the wiring board cover member 117. ing.

The wiring board cover member 117 covers the bent portion of the imaging module printed wiring board 143 while covering the opening. With this configuration, the overall size of the camera module 100A can be made smaller than that of the camera module 100 of the first embodiment. Specifically, the laminated cover member 116 is provided on the restricting portion 114d of the skirt member 114 and only covers the imaging module 14A protruding from the receiving port 114a. Therefore, the main body cover that covers the movable body 12 and the skirt member 114 is provided. It can be made smaller than the configuration using the member 115.

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

For example, in the embodiment, a so-called moving magnet type actuator in which the fixed body 11 has the coil portion 112 and the movable body 12 has the magnet portion 122 has been described. However, in the present invention, the fixed body has the magnet portion. However, the present invention can also be applied to a so-called moving coil type actuator in which the movable body has a coil portion. In this case, the yoke is also disposed on the fixed body.

In the embodiment, two sets of the tilt coil 112A, the permanent magnet 122A, the tilt coil 112C, and the permanent magnet 122C are arranged as a voice coil motor that swings and rotates the movable body 12 about the X axis, and the Y axis is Two sets of a tilt coil 112B, a permanent magnet 122B, a tilt coil 112D, and a permanent magnet 122D are arranged as voice coil motors that swing and rotate the movable body 12 at the center. If at least one set is arranged, respectively. Good.

The positional deviation detection unit 40 is disposed on the fixed body 11 so as to face the bottom surface of the movable body 12. As a result, the positional deviation detection unit 40 makes the occupation space as small as possible and enables shake correction.

Further, each component constituting the OIS actuator A is preferably made of a material having high heat resistance (particularly, the magnet portion 122). Thereby, it can respond to the soldering by a reflow system. Further, a conductive shield case may be provided outside the camera module 100 as a noise countermeasure.

In the embodiment, a smartphone as a mobile terminal with a camera has been described as an example of a camera mounting device including the camera module 100, but the present invention can be applied as a camera mounting device as an information device or a transport device. For example, the present invention can be applied to a camera-equipped mobile phone, a notebook computer, a tablet terminal, a portable game machine, a web camera, and the like as a camera-mounted device. The present invention can also be applied to a vehicle or a vehicle-mounted device with a camera (for example, a back monitor device or a drive recorder device) as a camera-mounted device. FIG. 17 is a diagram showing an automobile C equipped with a vehicle-mounted camera module VC (Vehicle Camera). 17A is a front view of the automobile C, and FIG. 17B is a rear perspective view of the automobile C. The automobile C is equipped with the camera module 100 described in the embodiment, for example, as an in-vehicle camera module VC. This in-vehicle camera module VC is used for a back monitor, a drive recorder, a collision avoidance control, an automatic driving control, and the like.

The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

The disclosure of the specification, drawings and abstract contained in the Japanese application of Japanese Patent Application No. 2015-127686 filed on June 25, 2015 and the Japanese application of Japanese Patent Application No. 2016-060058 filed on March 24, 2016 are all Incorporated herein by reference.

DESCRIPTION OF SYMBOLS 11 Fixed body 12 Movable body 13 Elastic support part (support part)
13a Central part 13b Inner gimbal 13c Outer gimbal 14 Imaging module 15 Shake detection part 30 Relay board 40 Misalignment detection part 40a, 40b Hall element 60 Driver IC
70, 70A Rigid FPC (Main PCB)
70a, 70Aa Rigid part 70b, 70Ab Flexible part 80, 80A Coil substrate (flexible printed circuit board)
81 Power supply pad 82, 82A, 83, 83A Connection terminal part (terminal part)
92, 93 Connection terminal part 100, 100A, 100B Camera module 111, 111A Base member 111a Protruding part 112 Coil part 112A, 112B, 112C, 112D Tilt coil 114 Skirt member 114a Receiving port 114d Restricting part 115, 115B Cover member 115a Opening 120 Yoke (holding member)
121 Yoke body 121b Outer hanging part 121c Inner hanging part 1211a Module mounting part 1211b Gimbal mounting part 122 Magnet part 122A, 122B, 122C, 122D Permanent magnet 126 Module guide 141 Lens part 142 AF actuator VC In-vehicle camera module

Claims (9)

1. A lens driving device that performs shake correction by inclining an imaging module having a lens unit and an imaging element by a driving force of a voice coil motor having a coil unit and a magnet unit,
   A movable body having a frame-like holding member on which the imaging module is placed, and the magnet member being arranged on the holding member;
   A fixed body having a base member and configured by arranging the coil portion on the base member;
   A support portion that is disposed on the base member and supports the movable body in an inclinable manner with respect to the fixed body;
   A circuit that feeds power to the coil unit and drives the voice coil motor to enable shake correction, and a main board to which the fixed body is fixed;
   Have
   The fixed body has a coil substrate having a terminal portion to which the coil portion is connected,
   The coil part is connected to the circuit of the main board via the terminal part of the coil board.
   Lens drive device.
2. The coil substrate is a flexible printed circuit board.
   The lens driving device according to claim 1.
3. The main board is a rigid flexible board,
   The lens driving device according to claim 1.
4. The coil unit and the magnet unit include a first coil and a first magnet that move the movable body in a first direction orthogonal to the optical axis direction of the lens unit,
   A second coil and a second magnet that move in the optical axis direction and a second direction orthogonal to the first direction;
   The fixed body includes first and second Hall elements that detect magnetic forces of the first magnet and the second magnet, respectively.
   The terminal portion of the coil substrate is connected to the first coil, the second coil, the first Hall element, and the second Hall element,
   The first coil, the second coil, the first Hall element, and the second Hall element are connected to a circuit of the main board through the terminal portion of the coil board.
   The lens driving device according to claim 1.
5. The support part is an elastic support part that supports the movable body in an inclined manner with respect to the fixed body by elastic deformation,
   The frame-shaped holding member includes a frame-shaped module mounting portion on which the imaging module is mounted;
   A support portion mounting portion that is disposed inside the module mounting portion and to which the support portion is mounted at a step surface lower than the module mounting portion;
   Having
   The lens driving device according to claim 1.
6. The coil substrate is disposed on the base member, and the terminal portion of the coil substrate extends to the side of the base member.
   The lens driving device according to claim 1.
7. A lens driving device according to claim 1;
   An imaging module having a lens part and an imaging element and bonded to the holding member;
   A shake detection unit for detecting shake of the imaging module;
   Comprising
   The camera module.
8. The imaging module has an autofocus function,
   The camera module according to claim 7.
9. A camera-equipped device that is an information device or a transport device,
   The camera module according to claim 7 is provided.
   Camera mounted device.

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