JP2007227246A - Holding structure of battery contact terminal, and battery contact terminal holding structure of electronic key - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a holding structure of a battery contact terminal capable of reducing the area of a board used as a mounting position of a battery contact terminal, and of securing sufficient holding strength for the board of the battery contact terminal; and to provide a battery contact terminal holding structure of an electronic key. <P>SOLUTION: In a portable machine 2, a button battery 18 is stored as its power source. A board 27 is incorporated in a body case 13 of the portable machine 2, and a positive-side contact terminal 24a and a negative contact terminal 24b electrically contacting the button battery 18 are soldered and fixed to the board 27 in a cantilever structure. A terminal holding part 40 is formed on a frame 16 constituting the body case 13, and the positive-side contact terminal 24a and the negative contact terminal 24b are insert-molded in the frame 16 in that part. The positive-side contact terminal 24a and the negative contact terminal 24b are held by both soldering parts 39a and 39b each having a cantilever structure and the terminal holding part 40 of the frame 16. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a battery contact terminal holding structure which is an electrical contact point between a battery and a battery contact terminal holding structure of an electronic key having the battery contact terminal.

  In recent years, many vehicles have been equipped with a hands-free system that allows the user to lock and unlock the doors of the vehicle and start the engine if they own a portable device without actually performing the key operation using the vehicle key. Yes. This hands-free system transmits a request signal from a transmitter of a vehicle, receives an ID code signal returned from the portable device in response to the request signal, and receives the ID code signal at the time of receiving the ID code signal. The ID code on the vehicle side is matched with the ID code on the vehicle side, and if these ID codes match and ID collation is established, door locking / unlocking and engine starting are permitted.

  As shown in FIGS. 6 and 7, a substrate (PC board) 83 on which various elements (electronic components) for the portable device 81 are mounted is built in the hollow body case 82 of the portable device 81. Yes. The board 83 is provided with a battery terminal 85 to which a button battery (coin battery) 84 to be a power source of the portable device 81 is attached. The battery terminal 85 is a portion that is in electrical contact with the button battery 84, and includes a + side contact terminal 85a and a − side contact terminal 85b corresponding to the + terminal and the − terminal of the button battery 84.

  The + side contact terminal 85 a and the − side contact terminal 85 b are made of a long plate-like metal plate, and are attached and fixed to the substrate 83 by a both-end support structure in which both ends are soldered to the substrate 83. The button battery 84 is in an attached state in which the button battery 84 is sandwiched from above and below by the + side contact terminal 85a and the − side contact terminal 85b. Since the positive side contact terminal 85a and the negative side contact terminal 85b are attached to the board 83 by the soldering portions 86a and 86b, the attachment strength of the contact terminals 85a and 85b to the board 83 is determined by soldering. It will be close to the total number of soldering points and the soldering area.

  By the way, in order to secure the attachment strength of the battery terminal 85 on the board 83, it is necessary to secure the soldering total number and soldering area on the board 83 to a certain level or more. However, when the battery terminal 85 having a double-sided structure is used, since two soldering locations are required per terminal, a total of four soldering locations are required, and the battery terminal 85 is strengthened. When soldering to the board 83, it is necessary to prepare a larger soldering area. For this reason, the battery terminal 85 having a dual-support structure has a problem that the size of the substrate 83 and thus the portable device 81 becomes relatively large.

Therefore, for example, by using a cantilever structure in which the positive side contact terminal 85a and the negative side contact terminal 85b are soldered to the substrate 83 only at one end, a necessary soldering region on the substrate 83 is omitted. It is conceivable to reduce the area of the substrate 83 and to reduce the size of the portable device 81. A cantilever structure of this type of battery terminal 85 is disclosed in, for example, Patent Document 1 and Patent Document 2.
JP-A-9-246751 JP 2000-149898 A

  However, when such a cantilever structure is adopted, the number of soldered portions of the battery terminal 85 on the board 83 is reduced, and the holding strength of the battery terminal 85 on the board 83 is reduced. Therefore, this measure is not practical. In addition, in order to firmly fix the battery terminal 85 to the substrate 83 in the cantilever structure, for example, the contact terminals 85a and 85b may be widened to increase the area of the soldering surface. There is a problem in reducing the area of the substrate 83, and there is no meaning as a countermeasure. Therefore, there has been a demand for a measure that can secure the holding strength of the battery terminal 85 while reducing the size of the substrate 83 (the portable device 81).

  An object of the present invention is to provide a battery contact terminal holding structure and an electronic device capable of reducing the area of a substrate to be a battery contact terminal mounting location and ensuring sufficient holding strength of the battery contact terminal to the substrate. An object of the present invention is to provide a battery contact terminal holding structure for a key.

  In order to solve the above problems, according to the present invention, when a battery is attached to a housing, a pair of battery contact terminals that become electrical contact points of the battery has at least one of the pair has a cantilever structure. In the holding structure of the battery contact terminal fixed to the substrate, the gist is that a terminal holding portion for holding the battery contact terminal fixed to the cantilever is provided in the casing.

  According to this configuration, even if the battery contact terminal is soldered and fixed to the substrate with a cantilever structure in order to reduce the area of the substrate, the battery contact terminal of the present invention is not limited to the terminal holding portion provided in the housing. Since it is held, in its attached state, it is held by both the soldering part and the terminal holding part. For this reason, compared with the case where a battery contact terminal is attached to a board | substrate only by a cantilever structure, for example, the holding location of a battery contact terminal will increase and the attachment strength of the battery contact terminal with respect to a board | substrate will improve. Therefore, even if the battery contact terminal is attached to the substrate in a cantilever structure in order to reduce the area of the substrate and, consequently, the size of the housing, the battery contact terminal can be hardly separated from the substrate.

The gist of the present invention is that the terminal holding portion holds the pair of battery contact terminals at a plurality of locations.
According to this configuration, when the battery contact terminal is held by the terminal holding part, the terminal holding part holds the battery contact terminal at a plurality of places, so that the battery holding terminals can be held more than usual by the terminal holding part. become. Therefore, it is possible to further improve the attachment strength of the battery contact terminal with respect to the substrate, which is very effective in preventing the battery contact terminal from peeling off.

  According to the present invention, the terminal holding portion is formed across the entire boundary separating the battery and the substrate so as to partition the battery housing space of the battery and the substrate housing space of the substrate. Is the gist.

  According to this configuration, the terminal holding portion that holds the battery contact terminal functions as a partition wall that blocks water intrusion into the substrate housing space. For this reason, for example, even if moisture enters the battery housing space, the moisture is blocked by the terminal holding portion before reaching the substrate housing space, and it is difficult for the moisture to enter the substrate housing space. Therefore, it becomes possible to ensure the waterproofness of the substrate.

  According to the present invention, the battery is a button battery having a thin disk shape, and the button battery has an attachment state sandwiched between the pair of battery contact terminals on the front surface and the back surface. To do.

According to this configuration, when a button battery is used as the battery, the button battery can be attached to the battery contact terminal in a state where it is difficult to remove.
According to the present invention, a wireless communication component that performs wireless communication with a key communication target via its own antenna, and a pair of battery contact terminals that serve as electrical contact points of the battery when the battery is attached to the housing A battery contact terminal holding structure for an electronic key, wherein at least one of the pair has a battery contact terminal fixed to a substrate in a cantilever structure. The gist is that a terminal holding portion for holding the terminal is provided.

  According to the present invention, it is possible to reduce the area of the substrate that is the attachment location of the battery contact terminal, and in that case, it is also possible to ensure sufficient holding strength of the battery contact terminal to the substrate.

Hereinafter, an embodiment of a battery contact terminal holding structure and an electronic key battery contact terminal holding structure embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, the vehicle 1 can perform door lock unlocking, luggage door unlocking, engine starting, etc., even if the portable device 2 is owned without performing mechanical key operation using an ignition key. An allowed hands-free system 3 is installed. The vehicle 1 is provided with a verification control unit 4 that performs ID verification in the hands-free system 3. A door control unit 5 that controls locking and unlocking of the door lock of the vehicle 1 is connected to the verification control unit 4 via a bus 6 in the vehicle. The vehicle 1 corresponds to a key communication target, and the portable device 2 corresponds to an electronic key.

  The collation control unit 4 is connected to an outside LF transmitter 7 installed outside the vehicle and an inside LF transmitter 8 installed inside the vehicle. The out-of-vehicle LF transmitter 7 and the in-vehicle LF transmitter 8 can transmit a signal in the LF band (several tens of kHz) based on a command from the verification control unit 4. An RF receiver 9 installed in the vehicle is connected to the verification control unit 4. The RF receiver 9 can receive an RF band (several hundred MHz) signal, and can demodulate the received signal and then output the signal to the verification control unit 4.

  When the outside LF transmitter 7 transmits a request signal Sreq in the LF band to form an outside communication area outside the vehicle, the portable device 2 entering the communication area puts its ID code in response to the request signal Sreq. An RF band ID signal Sid is returned. When the ID signal Sid is received by the RF receiver 9 when the request signal Sreq is transmitted from the external LF transmitter 7, the verification control unit 4 recognizes that the external communication has been established, and the ID code of the portable device 2 External verification is performed as ID verification for comparing the ID code of the vehicle 1. When the collation control unit 4 recognizes that the outside collation has been established, the door control unit 5 can drive the door lock motor 10 to permit the door control unit 5 to lock and unlock the door.

  When the collation control unit 4 detects that the driver has boarded, the request signal Sreq is transmitted from the in-vehicle LF transmitter 8 to form an in-vehicle communication area. When the driver with the portable device 2 enters the in-vehicle communication area, the portable device 2 returns an ID signal Sid in response to the request signal Sreq. When the ID signal Sid is received by the RF receiver 9 when the request signal Sreq is transmitted from the in-vehicle LF transmitter 8, the verification control unit 4 recognizes that in-vehicle communication has been established, and the mobile device 2 in the vehicle In-vehicle verification is performed as ID verification for comparing the ID code with the ID code of the vehicle 1, and the presence or absence of in-vehicle verification is recognized.

  An engine control unit 12 that performs ignition control and fuel injection control of the engine 11 is connected to the verification control unit 4. When the engine switch is operated to start the engine with the brake pedal depressed, the engine control unit 12 performs encrypted communication with the verification control unit 4 to confirm that the in-vehicle verification is established. When the engine control unit 12 receives a notification from the verification control unit 4 that the in-vehicle verification has been established, the engine control unit 12 performs ignition control and fuel injection control to start the engine 11.

  As shown in FIG. 2, the portable device 2 of this example is a thin card key whose overall appearance is a flat plate shape. The portable device 2 is provided with a resin main body case 13 that forms an outer frame of the portable device 2. The main body case 13 includes a pair of plate members 14 and 15 and a frame 16 that is attached between the plate members 14 and 15, and the plate members 14 and 15 and the frame 16 are provided with a plurality of screws (not shown). It is assembled together. The main body case 13 corresponds to a housing.

  An accommodation recess 17 whose one end is opened is formed at one end of the frame 16 (left end in FIG. 2). A battery case 19 in which a button battery 18 serving as a power source for the portable device 2 is accommodated is detachably attached to the accommodation recess 17. At one end of the frame 16, a pair of locking grooves 20, 20 are formed on both sides of the frame 16 in the width direction (arrow A direction in FIG. 2). On the other hand, the battery case 19 is provided with a support portion 21 that supports the button battery 18 in a mounted state, and a pair of locking pieces 22 and 22 formed on both sides of the support portion 21 in the width direction. The battery case 19 can be attached to the frame 16 in a retaining state by locking its own locking piece 22 in the locking groove 20 of the frame 16. The housing recess 17 corresponds to a battery housing space, and the button battery 18 corresponds to a battery.

  The frame 16 is provided with a battery terminal 23 that serves as an electrical contact point of the button battery 18. The battery terminal 23 is made of a pair of metal plates such as iron and copper, for example, one battery terminal being a + side contact terminal 24a and the other battery terminal being a − side contact terminal 24b. These contact terminals 24 a and 24 b are integrally manufactured with the frame 16 by being insert-molded with respect to the frame 16, and are in an attached state in which they are juxtaposed in the thickness direction of the frame 16. The contact terminals 24a and 24b correspond to battery contact terminals.

  As shown in FIG. 3, a mounting recess 25 is formed in the frame 16 at a position adjacent to the receiving recess 17 by cutting out the other end portion (the right end portion in FIG. 3) from the center portion. A board component 26 made up of various parts of the control system and communication system of the portable device 2 is attached to the mounting recess 25. The board component 26 of the present example is capable of transmitting a signal in the RF band, a board 27 on which various elements of the control system and the communication system are mounted, a receiving antenna 28 capable of receiving an LF band signal transmitted from the outside, and the like. A transmitting antenna (not shown) is provided. The mounting recess 25 is enclosed by the frame portion of the frame 16 and the upper and lower plate members 14 and 15 to form a sealed space, and the board component 26 is accommodated in this space. The mounting recess 25 corresponds to the substrate housing space.

  The reception antenna 28 is a three-axis antenna that can receive signals in the three-axis directions of XYZ. In this example, the reception antenna 28 includes three reception antennas 29 to 31. Among these, the receiving antenna 29 is a bar antenna in which an antenna wire (for example, a copper wire) wound around a ferrite core is accommodated in a resin antenna bobbin 29a having a rectangular parallelepiped shape. In the orthogonal coordinate system composed of the XYZ axes, the X axis direction is set. As a result, among the plurality of receiving antennas 29 to 31 on the substrate 27, the receiving antenna 29 can receive a signal in the X-axis direction.

  The receiving antenna 30 is a bar antenna having a structure similar to that of the receiving antenna 29, and the axis of the bar antenna is set in a direction that is in the Y-axis direction in an orthogonal coordinate system composed of XYZ axes. Yes. Thereby, among the plurality of receiving antennas 29 to 31 on the substrate 27, the receiving antenna 30 can receive a signal in the Y-axis direction. The receiving antennas 29 and 30 are each fixed to the substrate 27 by soldering in a state where antenna wires (for example, copper wires) are electrically connected to the substrate 27.

  The receiving antenna 31 is a loop antenna in which a plurality of antenna wires 31b made of, for example, copper wire are wound around the outer periphery of a resin antenna bobbin 31a having a flat plate shape, and the axis of the loop antenna is XY -In the orthogonal coordinate system composed of the Z-axis, the orientation is set to be the Z-axis. As a result, among the plurality of receiving antennas 29 to 31 on the substrate 27, the receiving antenna 31 can receive a signal in the Z-axis direction. On the outer periphery of the antenna bobbin 31a, a groove portion 31c is provided over the entire periphery, and a plurality of antenna wires 31b are wound around the groove portion 31c. The receiving antennas 29 to 31 correspond to antennas.

  In the antenna bobbin 31a, engagement holes 32a and 32b are penetrated at two corners. In addition, metal antenna connection terminals 33a and 33b project from the board 27 at positions corresponding to the engagement holes 32a and 32b of the antenna bobbin 31a. The antenna bobbin 31a engages the antenna connection terminal 33a with the engagement hole 32a, engages the antenna connection terminal 33b with the engagement hole 32b, and connects each end of the antenna line 31b to the antenna connection terminals 33a and 33b. In the hooked state, the ends of the antenna connection terminals 33a and 33b are bent and fixed to the substrate 27. In the frame 16, a key accommodating portion 16 a that can accommodate an emergency key is formed at a position adjacent to the mounting recess 25.

  In the edge of the substrate 27, a plurality of locking holes 34, 34... In addition, a plurality of protrusions 35 are provided on the rear surface of the antenna bobbin 31 a at positions corresponding to the locking holes 34 of the substrate 27. When the antenna bobbin 31 a is attached and fixed to the substrate 27, the antenna bobbin 31 a is positioned with respect to the substrate 27 by the projection 35 engaging with the engagement hole 34.

  Various elements (components) such as a control IC (Integrated Circuit) 36 that performs overall control of the portable device 2 and a reception IC 37 that demodulates the LF signal received by the reception antenna 28 are disposed at positions where the antenna bobbin 31a is covered on the substrate 27. ) Has been implemented. The receiving antennas 29 and 30 are also arranged on the substrate 27 at positions where they are covered by the antenna bobbin 31a. The control IC 36, the reception IC 37, etc. constitute a wireless communication component.

  When the portable device 2 receives the LF signal with the receiving antenna 28, the receiving IC 37 demodulates the LF signal and outputs it to the control IC 36. When the control IC 36 inputs demodulated LF data from the reception IC 37, the control IC 36 decodes the data contents. If the LF signal is a request signal Sreq indicating an ID signal return request, the control IC 36 responds to the request signal Sreq. An ID signal Sid carrying an ID code unique to the portable device is generated and sent back from the transmitting antenna to the vehicle 1.

  A pair of lands 38a and 38b are provided at positions on the substrate 27 that are not covered with the antenna bobbin 31a. The + side contact terminal 24a and the − side contact terminal 24b are attached to the substrate 27 by a cantilever structure. In this example, one end of the + side contact terminal 24a is soldered and fixed to the land 38a by spot welding. One end of 24b is soldered and fixed to the land 38b by spot welding. Thus, since the + side contact terminal 24a and the − side contact terminal 24b are fixed to the substrate 27 with solder, the frame 16 is formed of a resin material having high heat resistance so as not to be affected by heat at that time. .

  The board component 26 has an adhesive surface obtained by bonding the periphery of the antenna bobbin 31a to the inner peripheral surface of the mounting recess 25, and the soldering portions 39a and 39b of the + side contact terminal 24a and the − side contact terminal 24b in the lands 38a and 38b. (See FIGS. 2 and 4). When only the substrate 27 before the antenna bobbin 31a is attached is viewed, the substrate 27 is fixed to the frame 16 only by the soldering portions 39a and 39b.

  As shown in FIGS. 2 to 4, in the frame 16, a terminal holding portion 40 is formed around the button battery 18 when accommodated in the accommodating recess 17. The terminal holding portion 40 holds the + side contact terminal 24 a and the − side contact terminal 24 b in a positioning state, and is integrated with the main body portion of the frame 16. The + side contact terminal 24a and the − side contact terminal 24b are respectively held by the terminal holding part 40 at two locations, that is, an end portion on the opposite side to the soldering location and a location before the soldering surface.

  As shown in FIG. 4, the + side contact terminal 24 a and the − side contact terminal 24 b have a concave shape in which the central portion is lower in height than both ends, and the respective recessed portions face each other. Has been placed. When the button battery 18 is attached to the main body case 13, the button battery 18 is in an accommodation state in a space formed between the + side contact terminal 24 a and the − side contact terminal 24 b. The button battery 18 is attached in the thickness direction of the main body case body, the + terminal on the upper surface thereof contacts the + side contact terminal 24a, and the − terminal on the lower surface contacts the − side contact terminal 24b. .

  The terminal holding portion 40 is formed across a boundary that separates the housing recess 17 that houses the button battery 18 and the mounting recess 25 in which the substrate 27 is located. That is, the terminal holding part 40 is formed in a curved shape along the outer peripheral shape of the button battery 18 so as to divide the housing recessed part 17 and the mounting recessed part 25 as separate chambers, and the moisture that has entered the housing recessed part 17 is attached to the mounting recessed part 25. It also has a waterproof function so as not to enter the side and reach the substrate 27.

  In this example, in order to reduce the area of the substrate 27, the + side contact terminal 24a and the − side contact terminal 24b are cantilevered, so that the soldering points required in the case of the both-sided structure are eliminated. Omitted, the substrate 27 is downsized. However, when the + side contact terminal 24a and the − side contact terminal 24b have a cantilever structure, the number of soldered portions of the contact terminals 24a and 24b is reduced, and accordingly, the + side contact terminal 24a and − − A problem arises in the mounting strength of the side contact terminal 24b.

  Therefore, in the case of this example, when the frame 16 is molded, the + side contact terminal 24a and the − side contact terminal 24b are insert molded. When the frame 16 is attached to the substrate 27 (substrate component 26), the + side contact terminal 24a and the − side contact terminal 24b with only one end exposed are soldered to the substrate 27 in a cantilever structure. Therefore, the + side contact terminal 24a and the − side contact terminal 24b are held by both the soldering portions 39a and 39b and the terminal holding portion 40 in the attached state. For this reason, even if the + side contact terminal 24a and the − side contact terminal 24b are supported by the substrate 27 in a cantilever structure, the contact strength of the contact terminals 24a and 24b is reinforced by the terminal holding portion 40, It becomes possible to ensure sufficient attachment strength of the + side contact terminal 24a and the − side contact terminal 24b.

  Therefore, even if a cantilever structure is adopted for the attachment structure to the substrate 27, the + side contact terminal 24a and the − side contact terminal 24b can be hardly separated from the substrate 27. For this reason, it is possible to achieve both the downsizing of the main body case 13 (that is, the portable device 2) by reducing the area of the substrate 27 and securing the attachment strength of the + side contact terminal 24a and the − side contact terminal 24b to the substrate 27. It becomes possible.

  Further, the terminal holding part 40 is provided with a waterproof function by forming the terminal holding part 40 around the boundary of the button battery 18, that is, the entire boundary that defines each room of the accommodation concave part 17 and the mounting concave part 25. Yes. Therefore, for example, even if moisture enters the housing recess 17 that houses the button battery 18, the terminal holding unit 40 blocks the moisture and restricts moisture from entering the space on the mounting recess 25 side. Therefore, a situation where moisture adheres to the substrate 27 is less likely to occur, and problems such as failure of various elements due to moisture adhesion are less likely to occur.

  Further, insert molding of the + side contact terminal 24a and the − side contact terminal 24b into the main body case 13 means that these contact terminals 24a and 24b are manufactured as an integral part of the frame 16, so that the frame 16 is mounted on the substrate. When assembling to the board 27 (substrate component 26), the soldering positions of the contact terminals 24a and 24b are uniquely determined together with the positioning. Therefore, the positioning property when soldering the + side contact terminal 24a and the − side contact terminal 24b to the substrate 27 is improved, and it is difficult for displacement to occur during soldering.

According to the configuration of the present embodiment, the following effects can be obtained.
(1) When the terminal holding part 40 is added to the main body case 13 and the + side contact terminal 24a and the − side contact terminal 24b are insert-molded in the part and attached to the substrate 27 (substrate component 26), The + side contact terminal 24 a and the − side contact terminal 24 b are soldered and fixed to the substrate 27 with a cantilever structure. Therefore, even if the + side contact terminal 24 a and the − side contact terminal 24 b are fixed to the substrate 27 in a cantilever structure, the + side contact terminal 24 a and the − side contact terminal 24 b are held by both the soldering portions 39 a and 39 b and the terminal holding portion 40. For this reason, the attachment strength of these contact terminals 24a and 24b with respect to the board | substrate 27 can be ensured, and the contact terminals 24a and 24b can be made hard to peel from the board | substrate 27. FIG.

  (2) When holding the + side contact terminal 24a and the − side contact terminal 24b by the terminal holding unit 40, these contact terminals 24a and 24b are held by the terminal holding unit 40 at a plurality of locations (in this example, 2 locations). Therefore, the attachment strength of the contact terminals 24a and 24b to the substrate 27 can be increased, and the effect of preventing the contact terminals 24a and 24b from peeling off is high.

  (3) By forming the terminal holding portion 40 across the entire boundary of these chambers so as to divide the chambers of the accommodating recess 17 for accommodating the button battery 18 and the mounting recess 25 for accommodating the substrate 27. The terminal holding part 40 was given a waterproof function. Therefore, even if moisture enters the housing recess 17 of the button battery 18, the moisture is blocked by the terminal holding portion 40 and difficult to reach the substrate 27, so that the waterproofness of the substrate 27 can be ensured. .

  (4) Since the + side contact terminal 24 a and the − side contact terminal 24 b are insert-molded in the main body case 13, these contact terminals 24 a and 24 b are manufactured as an integral part of the frame 16. For this reason, when the frame 16 is assembled to the substrate 27 (substrate component 26), along with its positioning, the soldering positions of these contact terminals 24a and 24b are uniquely determined. Therefore, the positioning property when soldering the + side contact terminal 24a and the − side contact terminal 24b to the substrate 27 is improved, and it is possible to make it difficult to cause a positional shift during the soldering.

(5) When the button battery 18 is attached to the main body case 13, the button battery 18 is sandwiched in the vertical direction, so that the button battery 18 can be attached to the main body case 13 in a state where it is difficult to come off.
In addition, this embodiment is not limited to the said structure, You may change into the following aspects.

  The battery terminal 23 is not limited to the case where both the + side contact terminal 24a and the − side contact terminal 24b are cantilevered and attached to the substrate 27, but only one of the contact terminals 24a and 24b is cantilevered. The contact terminal on the cantilever side may be held by the terminal holding unit 40.

  When the + side contact terminal 24a and the − side contact terminal 24b are held by the terminal holding unit 40, the + side contact terminal 24a and the + side contact terminal 24b are not necessarily held at two places, but may be held at one place, or three or more places. It may be held at.

The terminal holding portion 40 is not necessarily limited to being formed on the frame 16, and may be formed on the plate material 14 or the plate material 15, for example.
-The battery terminal 23 is not limited to the structure which clamps the button battery 18 from the up-down direction with two board | plate materials. For example, the negative side contact terminal 24 b may be disposed at a position facing the back surface of the button battery 18, and the positive side contact terminal 24 a may be erected on the side surface of the button battery 18.

  The electronic key is not limited to the thin portable device 2 (thin card key), and may be a portable device having a slightly thick general shape. Further, the portable device 2 is not limited to the hands-free key that automatically returns the ID signal Sid when the request signal Sreq is received, and the portable device 2 is provided with a lock button or an unlock button, and when this button is operated. It may be a remote key that locks and unlocks the door.

  The hands-free system 3 does not necessarily have both the door lock locking / unlocking function and the engine start function, and may be a system having one of these functions. Moreover, the system using the immobilizer system which performs ID collation with the transponder built in the portable device 2 about the engine starting function may be used for the door lock locking / unlocking function.

  -The battery used for the portable device 2 does not necessarily need to be the button battery 18, and for example, a battery such as a manganese dry battery, an alkaline dry battery, a nickel-based primary battery, or a lithium battery may be used.

  -The communication object of the portable device 2 of this example is not necessarily limited to the vehicle 1, and may be employed, for example, for door locking / unlocking of a house or the like, and widely applicable to communication objects other than the vehicle. Moreover, the holding structure of the battery terminal 23 of this example is not necessarily employed in the portable device 2 but may be employed in various devices driven by batteries.

Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects.
(1) In any one of Claims 1-4, the said battery contact terminal is insert-molded with respect to the said housing | casing. In this case, it is possible to manufacture a part composed of battery contact terminals held by the casing itself as an integral part, and no work such as assembling the battery contact terminals to the casing is required when manufacturing the portable device.

The block diagram which shows the structure of the hands-free system in one Embodiment. The disassembled perspective view which shows the structure of a portable machine. The disassembled perspective view of the flame | frame which is a component of a portable machine, a loop antenna, and a board | substrate. The plane sectional view of the body case which expands and shows a button battery part. II-II sectional view taken on the line in FIG. The plane sectional view of the main part case which expands and shows the conventional button battery part. III-III sectional view taken on the line in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Vehicle as key communication object, 2 ... Portable machine as electronic key, 13 ... Main body case as housing | casing, 17 ... Housing recessed part as battery accommodation space, 18 ... Button battery as battery, 24a ... Battery contact terminal + Side contact terminal constituting the battery contact terminal, 24b-negative side contact terminal constituting the battery contact terminal, 25 ... mounting recess as the substrate housing space, 27 ... substrate, 29-31 ... receiving antenna as the antenna, 36 ... wireless communication component A control IC that constitutes a wireless communication component; 37 a reception IC that constitutes a wireless communication component; 40 a terminal holding unit;

Claims (5)

In the battery contact terminal holding structure in which at least one of the pair is fixed to the substrate in a cantilever structure, the pair of battery contact terminals that become electrical contact points of the battery when the battery is attached to the housing,
A battery contact terminal holding structure, wherein the housing is provided with a terminal holding portion for holding the cantilevered battery contact terminal.   The battery contact terminal holding structure according to claim 1, wherein the terminal holding portion holds the pair of battery contact terminals at a plurality of locations.   The terminal holding part is formed over the entire boundary that divides the battery and the substrate so as to partition a battery housing space of the battery and a substrate housing space of the substrate. The battery contact terminal holding structure according to 1 or 2.   The said battery is a button battery which comprised the thin disk shape, The said button battery takes the attachment state clamped by the pair of said battery contact terminal on the surface and the back surface. The battery contact terminal holding structure according to any one of the above. A wireless communication component that performs wireless communication with the key communication target via its own antenna;
An electronic key comprising a pair of battery contact terminals, which are electrical contact points of the battery when the battery is attached to the housing, and a battery contact terminal in which at least one of the pair is fixed to the substrate in a cantilever structure In the battery contact terminal holding structure of
A battery contact terminal holding structure for an electronic key, wherein the casing is provided with a terminal holding portion for holding the battery contact terminal fixed to the cantilever.

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