JP2011192657A - Information device including contact terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent separation of a contact part, which connects a battery pack part or the like and a body part, by vibration generated by falling or the like, and prevent failure such as temporary blackout of a power source by maintaining electrical connection. <P>SOLUTION: The battery pack 11 is detachably mounted on a lower case 2 of a casing for structuring the body part. A body part side terminal 21 provided on the lower case 2 is structured so as to include a multi-contact type contact spring 32 which is divided into a plurality of pieces so as to have different spring constants. When external force is applied and the contact spring 32 vibrates, either one of the contact parts abuts on an electrode land 45 of a battery side terminal 20 because the respective contact parts have different resonance frequencies due to the different spring constants. Therefore, the electrical connection is always maintained by preventing separation of all the contact parts. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an information device including a contact terminal that is attached to a main body of a detachable external unit (for example, a battery pack) such as a mobile phone or a personal digital assistant (PDA), and is electrically connected through the terminal. Specifically, it relates to the terminal structure.

  2. Description of the Related Art Portable information devices such as mobile phones are becoming more common in which a battery pack including a rechargeable secondary battery as a power source is detachably provided on a main body. In such a portable information device, as a main body side terminal that is electrically connected to and electrically connected to a terminal of a battery pack, conventionally, as disclosed in, for example, Japanese Patent Laid-Open No. 10-40990, the inside of a cylindrical portion is used. A structure is used in which a plunger and a spring are provided so that the tip of the plunger protrudes from the end of the cylinder and is brought into contact with the battery-side terminal.

  FIG. 12 is a local sectional view showing a configuration example of a terminal portion in a conventional portable information device. The main body 201 incorporates a printed circuit board 203 on which the main body side terminals 202 are mounted. The printed circuit board 203 is formed with an electronic circuit that realizes each function of the device. The main body side terminal 202 is provided with a cylindrical portion 205 whose tip is opened on a base portion 204, and a spring 206 and a plunger 207 are disposed in the cylindrical portion 205. The cylindrical portion 205 is an open portion with one end open and a throttle portion with the other end closed. One end of a spring 206 abuts the throttle portion to become a fixed end, and the tip of the plunger 207 protrudes from the open portion. Yes. The plunger 207 is provided so as to be able to move in the cylindrical portion 205 while being urged by the elastic force of the spring 206, and a base end portion 208 having a large diameter that protrudes in a circumferential manner to the side is moved by the spring 206. It touches the end.

  A battery housing portion 209 is formed in a concave shape on one surface of the main body portion 201, and the tip of the plunger 207 of the body portion side terminal 202 projects from the battery housing portion 209. In addition, the battery pack 210 that is detachably assembled to the battery storage unit 209 is provided with the battery side terminal 211 exposed corresponding to the position of the plunger 207 of the main body side terminal 202. When the battery pack 210 is attached to the battery storage unit 209, the main body side terminal 202 and the battery side terminal 211 come into contact with each other and are electrically connected.

  In this configuration, when the battery pack 210 is to be attached to the main body 201, the battery-side terminal 211 comes into contact with the plunger 206 of the main-body-side terminal 202, and when the attachment is completed, the spring 206 is compressed by a predetermined amount. Thus, the battery side terminal 211 is energized by the amount of compression.

  Here, the mass of the plunger 207 is m1, and the spring constant of the spring 206 is k1. Since the plunger 207 is a terminal that can move only in the expansion / contraction direction of the spring 206, the configuration of the conventional main body side terminal 202 can be replaced with a one-degree-of-freedom spring mass model. The spring mass model at this time is shown in FIG. Further, the resonance frequency f1 of this mass model system is derived by the following equation (1).

  When the relative positional relationship of the battery pack 210 with respect to the main body 201 is changed with the battery pack 210 mounted in the configuration of the terminal portion in the conventional portable information device described above, the spring 206 is usually compressed or expanded to cause the plan. The jar 207 follows and the contact state of the terminal is continued. However, since the system having this configuration has the resonance frequency f1 obtained from the above equation (1), the amplitude of the spring 206 is maximized when a forced vibration matching the resonance frequency f1 is applied from the outside.

  This type of portable information device with a battery pack is usually held in your hand, so it may be accidentally dropped on the ground, especially if it falls on asphalt or concrete on the road, And a large impact acceleration acts on the whole apparatus including terminal parts such as battery side terminals.

  In general, when a user accidentally drops a portable information device, in the case of a mobile phone, the lower case, upper case, antenna, display unit, etc. may be damaged. As a result, we have developed equipment with increased housing rigidity and strength so that it will not break or fail even if dropped from a height of 1 to 1.5 m.

  However, when an external force having a frequency matching the resonance frequency f1 is applied during the fall, the spring 206 repeats expansion and compression regardless of changes in the relative position of the battery pack 210. When the biasing force to the terminal 211 increases and compresses, it decreases. When the urging force becomes zero when the spring 206 is compressed, the battery-side terminal 211 and the plunger 207 are not in contact with each other, and both are electrically separated. Since the power supply from the battery pack 210 to the main unit 201 is stopped for a short time due to this division, the characters displayed on the display unit of the device and the display lamp of the display unit are not damaged even if the device housing is damaged. Sometimes disappeared.

  In such a case, the user has restored the operation of the device by performing an operation for turning the power on again, but at this time, the user may be mistakenly recognized as having failed. In addition, if the power is cut off during input of characters, numbers, etc., the input information will be lost, so re-input is necessary. Particularly in recent years, data communication has been performed using this type of portable information device. If the above-described instantaneous interruption occurs during this data communication, there is a risk of data corruption.

  The present invention has been made in view of the above circumstances, and can prevent disconnection of a contact portion due to external vibration caused by impact acceleration or the like that acts at the time of dropping, and can prevent power supply interruption or signal loss. It aims at providing the information equipment provided with the contact terminal.

  The present invention includes, firstly, a substrate, a root portion that has conductivity and is in contact with the substrate, a tip portion that is divided into at least two portions with respect to the root portion, and the one tip portion that is divided. A first contact portion provided, and a second contact portion provided at the other divided tip, and the first contact portion and the second contact portion are provided with elasticity, and at least A battery pack having one electrode land, wherein the first contact portion and the second contact portion can contact the electrode land.

  The electrode land may be for positive electrode or negative electrode. The battery pack may include a battery cell, and the electrode land may be connected to the battery cell. Furthermore, the electrode land may have a flat surface, and the first contact portion and the second contact portion may be able to contact the electrode land in the flat surface.

  As described above, according to the present invention, a contact terminal that can prevent disconnection of a contact portion due to external vibration caused by impact acceleration that acts at the time of dropping, and that can prevent instantaneous interruption of a power source or loss of a signal. The effect which can provide the provided information equipment is acquired.

It is sectional drawing which shows the structure of the mobile telephone as an information apparatus which concerns on embodiment of this invention. It is a perspective view which shows the structure of the main-body-part side terminal in 1st Embodiment of this invention. It is local sectional drawing of the main-body-part side and the battery side terminal part vicinity in the state with which the battery pack in 1st Embodiment was mounted | worn. It is a perspective view which shows the structure of the main-body-part side terminal in 2nd Embodiment of this invention. It is sectional drawing which shows the structure of the main-body part side terminal in 3rd Embodiment of this invention. It is sectional drawing which shows the structure of the main-body part side and battery side terminal part in 4th Embodiment of this invention. It is sectional drawing which shows the structure of the main-body part side and battery side terminal part in 5th Embodiment of this invention. It is a block diagram which shows the electric constitution of the mobile telephone in embodiment of this invention. It is a graph which shows the fluctuation state of the supply voltage to the circuit part at the time of a momentary interruption generation | occurrence | production. It is a perspective view which shows the structure of the main-body part side terminal in 6th Embodiment of this invention. It is local sectional drawing of the main-body part side and the battery side terminal part vicinity in the state with which the battery pack in 6th Embodiment was mounted | worn. It is local sectional drawing which shows the structural example of the terminal part in the conventional portable information device. It is explanatory drawing which replaced and showed the structure of the conventional main-body part side terminal to the spring mass model of a 1 degree-of-freedom system.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
FIG. 1 is a cross-sectional view showing a configuration of a mobile phone as an information device according to an embodiment of the present invention. The main body of the mobile phone is constituted by a housing 3 formed by engaging an upper case 1 and a lower case 2. In the housing 3, a bar-shaped antenna 4 that can be used for transmission / reception for transmitting or receiving a high-frequency signal, an antenna 5 for diversity reception, a receiver 6 for outputting sound, characters and symbols, and the like are displayed. A liquid crystal display unit 7, a key sheet 8 on which characters and symbols are printed, a transmitter 9, a main body printed board 10, and the like are accommodated.

  The upper case 1 has a sound hole 12 for guiding the sound generated from the receiver 6 to the outside of the housing, and a key hole formed at the same position corresponding to the protrusion 13 so that the protrusion 13 of the key sheet 8 is inserted and exposed to the outside. 14. An opening 15 equivalent to the size of the liquid crystal display unit 7 is provided. A transparent window 16 is attached to the opening 15 and a lid is formed so that a user can recognize and read characters, symbols, and the like displayed on the liquid crystal display unit 7.

  On the upper side of the back surface of the main body printed board 10 (surface on the lower case side), an oscillator (VCO) for controlling the oscillation frequency with voltage, a temperature compensated crystal oscillator (VC-TCXO) for stably controlling the frequency, a plurality of A resistor, a capacitor, and the like are mounted, and a receiving circuit unit 17 including a low noise amplifier, a fast mixer, and the like is formed. In addition to the receiving circuit unit 17, a modulator, a power amplifier (PA), a plurality of resistors, a capacitor, and the like are surface-mounted to form a transmitting circuit unit 18. The receiving circuit unit 17 and the transmitting circuit unit 18 are provided with a shield case 19 made of resin that prevents the intrusion of electromagnetic waves from the outside, and is covered and shielded. In addition, two main body side terminals 21 to which power is supplied are mounted for the positive electrode and the negative electrode on the lower side of the back surface of the main body printed circuit board 10 in contact with the battery side terminals 20 incorporated in the battery pack 11 and conducting. Has been.

  The shield case 19 is formed of a resin material such as acrylonitrile, butadiene, or styrene, and has a structure in which the passage of electromagnetic waves is blocked by electroless copper plating on the surface. Furthermore, electroless nickel plating is applied to the surface, and rust prevention treatment of electroless copper plating is performed.

  In addition, a battery housing portion 25 is formed in the lower case 2 in the drawing with a recessed space. The battery storage unit 25 stores a battery pack 11 for supplying power, which constitutes a battery unit as one aspect of the external unit, and is attached to the outer surface of the housing 3. A hook 26 is slidably attached to the lower case 2 in the upper part of the battery storage unit 25 in the figure, and an engagement groove 28 that engages with a locking claw 27 of the hook 26 on the outer side of one end of the battery pack 11. Is formed. Further, a hooking claw 29 protrudes from the other end of the battery pack 11, and an engaging recess 30 that engages with the hooking claw 29 is provided at the lower part of the battery storage unit 25 in the figure.

Next, the configuration of the terminal portion according to the first embodiment of the present invention will be described in detail with reference to FIGS.
FIG. 2 is a perspective view showing the configuration of the main body side terminal in the first embodiment, and FIG. 3 is a local sectional view in the vicinity of the main body side and the battery side terminal portion in a state where the battery pack in the first embodiment is mounted. is there. In the present embodiment, a connection release preventing means is configured in the main body side terminal 21.

  As shown in FIG. 2, the main body side terminal 21 is a spring-like terminal, and has a housing part 31 formed of resin and a contact spring 32 partially accommodated and held in the housing part 31. Configured. The housing portion 31 includes a holding portion 33 for holding the center side of the contact spring 32 and a locking portion 35 for preventing the locking piece 34 at the tip of the contact spring 32 from being locked and the contact spring 32 being pulled out. Two bosses 37 that are inserted and positioned in positioning holes 36 (shown in FIG. 3) of the main body printed board 10 are erected on the bottom.

  The contact spring 32 is formed by pressing a spring plate made of a conductive plate material having flexibility and conductivity, such as phosphor bronze or beryllium copper, and performing gold plating on the outer surface by secondary processing. The tip of the contact spring 32 is divided into two pieces, a first contact piece 38 (the back side in the figure) and a second contact piece 39 (the front side in the figure) with respect to the root part. And the second contact piece 39 are substantially equal in width and have different bending positions.

  That is, the first contact piece 38 is bent 90 degrees upward (point A) from the base portion formed parallel (horizontally) to the bottom surface of the housing portion 31 (point A), and further bent to about 45 degrees obliquely upward. (Point B), and further bent at about 90 degrees at the tip thereof (Point C), the first contact portion 41 is formed. On the other hand, the second contact piece 39 is bent 90 degrees upward from the root (point D), further bent 90 degrees horizontally (point E), and further in the reverse direction (upward oblique direction) at the tip side. ) Is bent at about 60 degrees (point F) and further bent at about 80 degrees at the tip (point G) to form the second contact portion 42.

  The first contact piece 38 and the second contact piece 39 are separated from the point A or D to the point B or E, and the contact pieces 38 and 39 are connected to the bending position and the top contact parts 41 and 42, respectively. The spring constant is varied by making the lengths different. In the first embodiment, the spring constant of the first contact piece 38 is set to 0.98 [N / mm], and the second contact piece 39 is set to 1/2 (0.49 [N / mm]). When these contact pieces 38 and 39 are replaced with a one-degree-of-freedom vibration model, the resonance frequency can be obtained by the equation (1) shown in the above-mentioned [Prior Art]. It is clear that the single contact piece 38 is about 1.4 times and the resonance frequency is different.

  Also, as shown in FIG. 3, the main body side terminal 21 configured as shown in FIG. 2 is surface-mounted on the main body printed circuit board 10 so that the two for the positive electrode and the negative electrode are aligned in the direction perpendicular to the paper surface. 38 and the contact portions 41 and 42 of the second contact piece 39 are arranged so as to protrude somewhat from the terminal openings 43 formed in the lower case 2 and are accommodated inside the battery accommodating portion 25 of the lower case 2.

  Inside the battery pack 11, a box-shaped battery cell 44 and a battery-side terminal 20 connected to the battery cell 44 are provided. The battery-side terminal 20 is constituted by a battery printed board 46 having a positive or negative electrode land 45 formed on the surface thereof. The electrode land 45 is exposed to the outside from the opening 47 of the exterior body of the battery pack 11, and when the battery pack 11 is attached to the lower case 2 of the housing 3, the contact portions 41 and 42 of the main body side terminal 21. It is provided in the position which contacts.

  Next, the operation of the terminal portion in this embodiment will be described. By engaging the hooking claws 29 of the battery pack 11 with the engaging recesses 30 of the lower case 2 and moving the hooks 26 to engage the engaging claws 27 with the engaging grooves 28 of the battery pack 11, 11 is attached to the battery housing part 25 of the lower case 2. At this time, the battery printed board 46 presses the first contact piece 38 and the second contact piece 39 to bend a predetermined amount. In this state, each contact piece 38, 39 has an elastic repulsive force corresponding to the amount of bending, and the hook nail 29 of the battery pack 11 is brought into close contact with the side wall of the engaging recess 30 of the lower case 2, and the battery The electrode lands 45 of the printed circuit board 46 are in contact with each other in an energized state, and both are intimately electrically connected.

When the mobile phone in such a state falls, the impact acceleration Q is derived from the following equation (2), where V0 is the speed when it hits the ground and ΔT is the time until this speed V0 becomes zero. It is burned.
Q = V0 / ΔT (2)

For example, if an impact acceleration of 100 G (980 m / s ² ) is generated in the device when dropped from a height of 1 m, ΔT is 4.5 × 10 ⁻³ seconds (220 Hz). At this time, even if the resonance frequency of the first contact piece 38 is 220 Hz, the resonance frequency of the second contact piece 39 is 160 Hz, so that the contact pieces 38 and 39 are not separated from the electrode land 45 at the same time. ing. Similarly, even if the resonance frequency of the second contact piece 39 is 220 Hz, similarly, the resonance frequency of the first contact piece 38 is different. Therefore, it is easily guessed that the contact pieces 38 and 39 are not separated from the electrode land 45 at the same time. it can.

  As described above, in this embodiment, by providing two contact pieces and different spring constants in the terminal connection portion by the contact pieces, even if one contact of the contact pieces is released, the other is in contact. The connection between the main body side terminal and the battery side terminal can always be maintained, and simultaneous contact / separation of a plurality of contact parts can be prevented. With this configuration, one of the main body side terminals always contacts the battery side terminal and the electrical connection is continued, and the contact that can avoid the momentary power supply interruption that has occurred in conventional devices An information device equipped with a terminal can be realized.

[Second Embodiment]
FIG. 4 is a perspective view showing the configuration of the main body side terminal in the second embodiment of the present invention. In the second embodiment, another configuration example of the main body side terminal is shown.

  The main body side terminal of the second embodiment has a configuration in which the shape of the contact spring is somewhat different from that of the first embodiment, and has three contact pieces as viewed from the outside. The main body portion side terminal 51 includes a housing portion 52 formed of resin and a contact spring 53 that is partly accommodated and held in the housing portion 52. The housing portion 52 has a holding portion 54 for holding the center side of the contact spring 53, and a locking portion 56 for preventing the locking piece 55 at the tip of the contact spring 53 from being locked and the contact spring 53 being pulled out. Two bosses 57 that are inserted and positioned in the positioning holes of the main body printed board 10 are erected on the bottom.

  The contact spring 53 is formed by forming a spring plate material having flexibility and conductivity, such as phosphor bronze or beryllium copper, by press working and gold plating the outer surface by secondary processing. The contact spring 53 is divided into a center portion and both end portions with respect to the root portion, and a first contact piece 58 at the center and second contact pieces 59a and 59b at both ends are formed. The bending positions of the first contact piece 58 and the second contact pieces 59a and 59b are the same.

  In the case of such a configuration, the difference in spring constant between the first contact piece 58 and the second contact pieces 59a and 59b is determined by the ratio of the plate widths. That is, the total plate width of the second contact pieces 59a and 59b is wider than the first contact piece 58, and the spring constant is set large. The main body side terminal 51 of the second embodiment is manufactured by the first contact piece 58 having a narrow plate width and weak rigidity surrounded by the second contact pieces 59a and 59b having a wide plate width and strong rigidity. In this case, it is possible to prevent a situation in which the operator suddenly touches the first contact piece 58 and causes deformation.

  Also in the second embodiment, as in the first embodiment, in the terminal connection portion using contact pieces, by providing a plurality of contact pieces and making the spring constants different from each other, one of the main body side terminals is always on the battery side. The electrical connection can be continued by abutting with the terminal, and instantaneous interruption of power supply can be prevented.

[Third Embodiment]
FIG. 5 is a cross-sectional view showing the configuration of the main body side terminal in the third embodiment of the present invention. In 3rd Embodiment, the structural example of the terminal provided with the plunger and the spring is shown.

  The main body portion side terminal 61 of the third embodiment includes a cylindrical portion 62 having an open front end portion, and a plunger 63 and a spring 64 are disposed in the cylindrical portion 62. Two main body side terminals 61 for the positive electrode and the negative electrode are arranged on the surface of the main body printed circuit board 10 so as to be aligned in the direction perpendicular to the paper surface, and arranged so that the tip of the plunger 63 protrudes somewhat. It is accommodated inside the accommodating part 25.

  The cylinder part 62 is an open part with one end opened at the top in the figure, and a throttle part with the other end closed at the bottom. One end of the spring 64 is in contact with the throttle part to become a fixed end. Two tip portions 65 and 66 protrude from the open portion. The plunger 63 is provided so as to be able to move in the cylindrical portion 62 while being urged by the elastic force of the spring 64, and a base end portion 67 that protrudes in a circumferential manner and has a large diameter is moved by the spring 64. It touches the end.

  The spring 64 is formed of an insulating material or a conductive material, and is in a so-called closed end (no grinding) state in which the end is not finished flat, and this end is almost the center of the base end 67 of the plunger 63. It arrange | positions so that it may contact | abut. Due to such an arrangement, the urging forces of the respective distal end portions 65 and 66 of the plunger 63 against the battery-side terminal 20 are somewhat different. Therefore, when force is applied to the tip portions 65 and 66 of the plunger 63, the plunger 63 is in an unbalanced state, so that it easily tilts.

  In the configuration of the third embodiment, there are a plurality of contact portions by the tip portions 65 and 66 of the plunger 63, and the plunger 63 is in the up and down direction (extension direction of the spring 64) and in the left and right direction (the spring 64 is inclined). Direction). That is, the main body side terminal 61 performs a multi-degree-of-freedom motion, not a one-degree-of-freedom system.

  The operation when impact acceleration is applied to the main body side terminal 61 having the above configuration will be described. When an impact acceleration such that the spring 64 is compressed acts on the planer 63 of the terminal portion, not only compression but also deformation in the falling direction occurs. For this reason, for example, even if the contact of the one end portion 66 of the planer 63 is released, the contact of the other end portion 65 is continued, so that the connection state is always maintained and the power supply is momentarily interrupted. It is impossible. In FIG. 5, the state in which the plunger 63 is inclined is indicated by a two-dot chain line.

  In the present embodiment, the structure in which any one of the plurality of tip portions of the plunger is always in contact with the battery side terminal is illustrated, but not limited thereto, the contact portion in contact with the battery side terminal is formed on the electrode land of the battery pack. On the other hand, any structure may be used as long as the connection state can be continued even if the contact position is changed, such as being provided so as to be movable in a direction other than the vertical direction.

  As described above, in the third embodiment, in the terminal connection portion using the planer and the spring, the plunger can be moved in a direction other than the expansion and contraction direction of the spring, so that the main body side terminal is always connected to the battery as in the first embodiment. The electrical connection can be continued by abutting with the side terminal, and an instantaneous interruption of the power supply can be prevented.

[Fourth Embodiment]
FIG. 6 is a cross-sectional view showing configurations of the main body side and the battery side terminal portion in the fourth embodiment of the present invention. 4th Embodiment shows the other example of arrangement | positioning structure of a main-body part side terminal.

  The terminal on the main body side of the fourth embodiment has a configuration including two terminals with different contact directions. The configuration of each main body portion side terminal may be the same as that of the first to third embodiments described above, or may be a conventionally used configuration. Here, an example using a configuration with contact pieces as shown in the first or second embodiment is shown. In the present embodiment, the connection release preventing means is configured in the main body side terminals 71 and 72.

  The battery pack 73 includes a battery printed board 79 that is bent substantially at right angles over two surfaces of the lower surface side (lower case side) and the other end side (the hooking claw side opposite to the hook). A battery-side terminal 74 formed of an electrode land formed on the substrate 79 and disposed so as to be exposed on the two surfaces is provided. Two battery side terminals 74 are provided for the positive electrode and the negative electrode. The lower case 2 of the main body is provided with main body side terminals 71 and 72, and two for the positive electrode and the negative electrode are mounted on the main body printed board 10 side by side in the direction perpendicular to the paper surface. The main body side terminals 71 and 72 accommodate contact springs 77 and 78, respectively, face the one surface 75 and the other surface 76 of the battery side terminal 74 with the battery pack 73 attached thereto, respectively. , 78 are in contact with the two surfaces of the battery side terminal 74 and urged.

  The operation when the impact acceleration is applied to the terminal portion having such a configuration will be described. For example, when the terminal portion is forced to vibrate due to dropping and the contact spring 77 of the main body side terminal 71 resonates, the contact portion may be separated from the one surface 75 of the battery side terminal 74 and the electrical connection may be released. However, in the present embodiment, the contact spring 78 of the main body side terminal 72 is in contact with the other surface 76 of the battery side terminal 74, and simultaneously with the contact spring 77, the contact spring 78 moves away from the battery side terminal 74. Since vibration cannot occur, the electrical connection is continued without releasing the contact between the contact spring 78 and the other surface 76 of the battery side terminal 74.

  That is, the urging directions of the contact springs 77 and 78 of the main body side terminals 71 and 72 are the Y and X directions in FIG. 6, respectively, so that, for example, an impact acceleration occurs in the Y direction and the resonance frequency of the contact springs 77 and 78 Even when the matching forced vibration works in the Y direction, the contact springs 77 and 78 do not resonate in the X direction. Similarly, the vibration direction is the X direction, and the two contact springs 77 and 78 are not separated from the battery-side terminal 74 at the same time.

  As described above, in the fourth embodiment, the main body side terminal is disposed so as to bias the battery side terminal by setting the contact direction in the terminal connection portion in a plurality of different directions. In the same manner as described above, the main body side terminal can always come into contact with the battery side terminal so that the electrical connection can be continued, and the instantaneous interruption of the power supply can be prevented.

[Fifth Embodiment]
FIG. 7 is a cross-sectional view showing the configuration of the main body side and the battery side terminal portion in the fifth embodiment of the present invention. 5th Embodiment shows the other example of a structure of a battery side terminal. The configuration of the main body side terminal 81 accommodated in the lower case 2 of the main body may be the same as that of the first to third embodiments described above, or may be a conventionally used configuration. Here, the example using the structure by the same contact piece as what was shown in 1st Embodiment is shown. In the present embodiment, the main body side terminal 81 and the battery side terminal 89 constitute connection release preventing means.

  A box-shaped battery cell 83 is accommodated inside the battery pack 82, and a battery flexible printed circuit board 85 having positive and negative electrode lands 84 formed on the surface thereof is connected to the battery cell 83 and is elastic. A battery-side terminal 89 that is a spring-like terminal by a restoring contact plate is configured. The electrode land 84 is exposed to the outside from the opening 86 of the exterior body of the battery pack 82, and contacts the contact spring 87 of the main body side terminal 81 when the battery pack 82 is attached to the battery storage portion 25 of the lower case 2. It is provided at the position where it touches.

  The flexible printed circuit board 85 for a battery having flexibility has a conductive circuit part formed on one side of a polyimide base film by copper foil or copper plating, and is made of an insulating material such as polyimide or polyester film so as to cover the surface. A covering cover is provided to protect the conductor circuit portion. Then, a part of the insulating cover is provided with an opening, and nickel plating or gold plating is further added to form an electrode land 84.

  In such a configuration, when the contact spring 87 of the main body side terminal 81 resonates due to impact acceleration or the like due to dropping, the contact spring 87 tries to move away from the electrode land 84, but the hardness of the electrode land 84 is very soft. On the other hand, since the spring constant of the contact spring 87 is sufficiently large, even if the biasing force of the contact spring 87 is released, the biased portion on the electrode land 84 side is restored and the connected state is maintained. That is, since the electrode land 84 and the contact spring 87 have different spring constants, the electrode land 84 does not resonate at the same time even if the contact spring 87 resonates. It is supposed to be.

  The electrode land 84 is not so large to be restored because the plate material of the battery flexible printed board 85 formed is extremely thin. In order to increase the amount of restoration and increase the effect of following the contact spring 87, between the outer surface of the battery pack 82 and other internal components (battery cells 83, etc.) on the side opposite to the electrode land 84, It is preferable to have a structure in which an urging force is applied to the electrode land 84 in the direction of the main body side terminal 81 by providing an elastic member 88 such as silicon sponge or silicon rubber having a spring constant different from that of the contact spring 87. . Thus, if the elastic member 88 is elastically compressed by the biasing force of the contact spring 87, the repulsive force can be obtained, and the terminals having different spring constants are in contact with each other. With this structure, both of them do not resonate at the same time, and even if one terminal resonates due to an external force, it is possible to avoid contact release of the terminal portion.

  As described above, in the fifth embodiment, since the battery-side terminal is made elastic so as to follow the movement of the main-body-side terminal, the terminals with different spring constants can be in contact with each other. As in the first embodiment, the main body side terminal can always come into contact with the battery side terminal so that the electrical connection can be continued, and instantaneous interruption of power supply can be prevented.

[Sixth Embodiment]
FIG. 8 is a block diagram showing an electrical configuration of the mobile phone according to the embodiment of the present invention. In the above embodiment, the configuration for avoiding the instantaneous interruption of the power supply due to dropping or the like has been described. As another example, a configuration example in which the operation stop of the device is avoided by shortening the instantaneous interruption duration without causing the occurrence of the instantaneous interruption will be described as a sixth embodiment.

  As described above, the mobile phone is configured such that the battery pack 102 is detachably attached to the main body 101. The battery pack 102 has a + (plus) electrode terminal of the power source, a-(minus) electrode terminal, and a T (temperature detection) terminal for detecting the temperature of the battery cell, and these battery side terminals 103 are connected via a contact portion. Are connected to the main unit side terminal 104 of the main unit 101 and supply the power VO to the circuit unit of the main unit 101. At this time, the power supply VO is directly or directly by the regulator 106 or the DC / DC converter 107 of the power supply circuit 105, each block of the circuit unit, for example, the transmission unit 109 or the reception unit 110 that forms the wireless unit 108, the power amplifier unit 111, and the control The data is supplied to the CPU 113, DSP 114, memory 115, etc. that form the unit 112.

  An electrolytic capacitor 116 or the like is held at the positive electrode of the main body side terminal 104 so that the electric charge can be held even if the battery pack 102 is momentarily disconnected from the main body portion 101 or the electrical connection of the contact portion is temporarily released. Connected to ground. Further, the control unit 112 has a reset function for monitoring the power supply voltage and outputting a reset signal for stopping the operation of all the circuit blocks when the terminal voltage becomes a voltage equal to or lower than a predetermined value. It has become.

  Next, the operation in the above configuration will be described. Here, it is assumed that the battery voltage supplied from the battery pack 102 to the main body 101 is V0 (= 3.6 V) and the necessary minimum voltage to be supplied to the circuit portion of the main body 101 is V1 (= 3.0 V). When the above-described momentary interruption occurs, the power supply voltage is discharged from the state in which the electric charge is stored by the above-described electrolytic capacitor 116, and thus the voltage gradually decreases from 3.6V.

  Here, a change in voltage when a momentary interruption occurs will be described. FIG. 9 is a graph showing the fluctuation state of the supply voltage to the circuit unit. In FIG. 9, from the state in which the battery voltage V0 is supplied from the battery pack 102 to the circuit unit of the main body unit 101, the time when the electrical connection of the contact unit is released and the instantaneous interruption occurs is T1, and the electrical connection of the contact unit is again performed. The time when the connection is made and the supply of power is started is T2, the time when the voltage gradually drops and the required minimum voltage V1 is reached after the instantaneous interruption occurs is T3, and the time when the instantaneous interruption is continued is ΔTa (= T2-T1), the time from the occurrence of a momentary interruption until the voltage drops to the required minimum voltage V1 is ΔTb (= T3-T1). This voltage drop time ΔTb is determined by the capacitance of the electrolytic capacitor 116 provided in the power supply line.

  The CPU 113 of the control unit 112 monitors the power supply voltage and outputs a reset signal for stopping the operation when the terminal voltage becomes lower than the necessary minimum voltage V1 which is a predetermined value (threshold value), and stops the operation of each part of the circuit unit. Let Here, the capacity of the electrolytic capacitor 116 is related to the time until the threshold value V1 is reached. The larger the capacity, the longer the voltage drop time ΔTb until the threshold value is reached, and the reset execution start time T3. Can be delayed. However, in order to lengthen the voltage drop time ΔTb, it is necessary to increase the capacity of the capacitor provided in the power supply line, occupying a lot of mounting space and increasing the size of the device.

  Therefore, in order to avoid an increase in the size of the device, it is desirable to shorten the instantaneous interruption duration ΔTa. If it is the structure of the terminal part shown in the above-mentioned 1st-5th embodiment, this ΔTb can be made zero, but the terminal part which can shorten ΔTb below the value required substantially is provided. In order to realize this, the following configuration is sufficient.

  FIG. 10 is a perspective view showing the configuration of the main body side terminal in the sixth embodiment, and FIG. 11 is a local sectional view of the main body side and the vicinity of the battery side terminal portion in a state where the battery pack is mounted. In the present embodiment, a connection release suppressing unit is configured in the main body side terminal 121.

  The main body side terminal 121 includes a housing part 122 formed of resin and a contact spring 123 that is partly accommodated and held in the housing part 122. The terminal end 124 of the contact spring 123 is soldered to the main body printed board 10. The shape of the tip side of the contact spring 123 is not divided into two as in the first embodiment, and has first to sixth bent portions 125a to 125f, and goes from the third bent portion 125c to the tip side. Therefore, the plate width is gradually narrowed. In addition, a first protrusion 126 and a second protrusion 127 that are in contact with the battery-side terminal 20 are formed by drawing on the third bent portion 125c and the fifth bent portion 125e, respectively. As shown in FIG. 11, the first and second protrusions 126 of the contact spring 123 of the electrode side 45 of the battery side terminal 20 and the contact spring 123 of the main body side terminal 121 in a state where the battery pack 11 is mounted in the battery storage portion 25 of the lower case 2. 127 is brought into contact with and electrically connected.

  Next, the operation of the terminal portion in this embodiment will be described. When the battery pack 11 is assembled to the lower case 2 in which the main body side terminal 121 having the above configuration is accommodated, the battery side terminal 20 of the battery pack 11 is first in the second bent portion 125e of the contact spring 123. The contact spring 123 bends from the fourth bent portion 125d by coming into contact with the protrusion 127, and then comes into contact with the first protrusion 126 of the third bent portion 125c to be bent from the second bent portion 125b. Therefore, when the battery pack 11 is mounted, the first protrusion 126 urges the battery-side terminal 20 with a reaction force obtained by the deformation of the second bent portion 125b and the fourth bent portion 125d, and the second protrusion 127 Since the battery side terminal 20 is urged by a reaction force obtained by deforming only the second bent portion 125b, the two contact portions have different spring constants and different urging forces.

  Here, even if the spring constant on the first protrusion 126 side (first spring constant) is formed to be larger than the spring constant on the second protrusion 127 side (second spring constant), both of them are the first embodiment. Since it is not an independent spring, it has a resonance frequency. However, for example, when compared with a configuration in which only the first projection having the first spring constant is in contact, the configuration of the present embodiment is such that the second projection having a small spring constant is in contact with the former (1 free The second protrusion side does not resonate when the latter (multi-degree-of-freedom vibration with a plurality of contact points as in the third and sixth embodiments) resonates. The first protrusion and the second protrusion have a resonance frequency that resonates. Therefore, in the sixth embodiment, since the resonance frequency can be increased, the above-described instantaneous interruption duration ΔTa can be shortened, and by making ΔTa> ΔTb, the capacitance of the capacitor provided in the power supply line can be further reduced. The size can be reduced and space can be saved.

  As described above, in the first to sixth embodiments, the structure of the battery contact terminal portion that can avoid the instantaneous interruption of the power supply and shorten the instantaneous interruption duration has been described. By using the configuration of these terminal portions, as in the first embodiment, almost any of the main body side terminals can be in contact with the battery side terminals so that the electrical connection is continued, It is possible to prevent the occurrence of problems due to instantaneous interruption of power supply. In addition, by reducing or reducing the capacity of the capacitors provided in the power supply line, it is possible to save the printed circuit board and to reduce the size and weight of the device.

  In recent years, information devices such as computers and other information processing devices such as public telephone lines perform data communication, and wireless communication such as images and audio data is becoming popular between mobile objects and information processing devices. is there. During transmission / reception of such data, if some external force is applied to the information device and the contact of the contact at the terminal portion is instantaneously released, the data being communicated may be lost. Therefore, for example, as an external unit, an information device including a communication unit including a communication external cable provided with a terminal portion and a connector fitted to the terminal portion of the communication unit, or a data storage function including a terminal portion. In an information terminal comprising a memory card having a memory card and a memory card connector that is in electrical contact with the terminal portion of the memory card, the structure of the terminal portion as shown in the previous embodiment It is also possible to apply. By providing an instantaneous disconnection prevention means against vibration by such a connection release prevention means or a connection release suppression means, the electrical connection can be continued at all times. Loss of signal can be avoided.

  In the above-described embodiment, the configuration of the terminal that electrically connects the battery pack and the main body portion by the contact method is exemplified, but the present invention can also be applied to other contact portions in the device. When applied to contact points in other power lines, instantaneous power interruptions can be avoided or the capacity of capacitors can be reduced, and when applied to audio signals, image signal lines, etc. It is possible to provide a terminal having a suitable structure in any contact portion, such as prevention of breakage and disappearance.

  As described above, in the present embodiment, a structure in which a plurality of contact springs having different spring constants are in contact, a structure in which contact springs are in contact from a plurality of directions, a structure in which terminals having different spring constants are in contact with each other, and the like. Therefore, it is possible to always maintain the electrical connection, and to avoid contact release when resonance occurs due to vibration when an external force is applied to the terminal portion, it is possible to prevent a failure such as a malfunction of the device due to a momentary interruption.

  According to the present invention, there is provided an information device including a contact terminal that can prevent disconnection of the contact portion due to external vibration caused by impact acceleration or the like that acts at the time of dropping, and can prevent a momentary power interruption or signal loss. It can be provided.

DESCRIPTION OF SYMBOLS 1 Upper case 2 Lower case 3 Case 10 Main body printed circuit board 11 Battery pack 20,74,89 Battery side terminal 21,51,61,71,72,81,121 Main body side terminal 31,52 Housing part 32,53, 77, 78, 87, 123 Contact spring 38, 58 First contact piece 39, 59a, 59b Second contact piece 41 First contact part 42 Second contact part 43 Terminal port 44 Battery cell 45, 84 Electrode land 46 Battery Printed circuit board 62 Cylinder 63 Plunger 64 Spring 65, 66 (Plunger) tip 85 Battery flexible printed circuit board 88 Elastic member 101 Body 102 Battery pack 105 Power supply circuit 108 Radio unit 112 Control unit 116 Electrolytic capacitor 126 1 protrusion 127 2nd protrusion

Claims (4)

A substrate,
A root portion that is electrically conductive and is in contact with the substrate; a tip portion that is divided into at least two portions with respect to the root portion; a first contact portion that is provided at one of the divided tip portions; A second contact portion provided at the other tip portion, and the first contact portion and the second contact portion are provided with elasticity, and
A battery pack having at least one electrode land,
The first contact portion and the second contact portion can contact the electrode land,
Portable information equipment. The portable information device according to claim 1,
The electrode land is for a positive electrode or a negative electrode, and is a portable information device. The portable information device according to claim 1 or 2,
The battery pack includes a battery cell, and the electrode land is connected to the battery cell. The portable information device according to any one of claims 1 to 3,
The electrode land has a plane, and the first contact portion and the second contact portion can contact the electrode land in the plane.

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