JP2014156697A - Substrate unit and electronic key - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a substrate unit capable of establishing compatibility between prevention of illegal alteration of a substrate and simplification of a battery holding structure, and an electronic key.SOLUTION: An electronic key comprises a substrate unit 7 in which a case 9 is assembled to a substrate 8. The substrate 8 and the case 9 are undetachably attached and fixed by a thermal caulking part 18 configured by shape-processing a part of the case 9. A battery holding mechanism 22 holds a battery 10 by a terminal-side claw part 24 arranged in a first terminal 12 and a case-side claw part 23 arranged at the corner part of the case 9.

Description

  The present invention relates to a board unit to which a battery can be attached and an electronic key.

  Conventionally, a substrate unit to which a battery can be attached is well known (see, for example, Patent Document 1). Patent Document 1 is assembled by fixing the protective cover and the battery holder, for example, by caulking, in a state where the substrate is sandwiched between the protective cover and the battery holder. By doing so, the mounting surface of the substrate is hidden by the protective cover, and the battery is held on the terminal of the substrate by the battery holder.

JP 2008-196194 A

  By the way, in this type of electronic key, it is essential that the substrate cannot be easily removed in order to prevent the substrate from being illegally modified. Moreover, since the board | substrate unit of patent document 1 requires a protective cover and a battery holder as a case, there was a limit in reducing in thickness. Furthermore, since the board unit of Patent Document 1 requires a large number of parts so that a protective cover and a battery holder are required as a case, there is a need to reduce the parts cost.

  An object of the present invention is to provide a substrate unit and an electronic key that can both prevent illegal modification of a substrate and simplify a battery holding structure.

  The board unit that solves the above problems is provided with a terminal on the board, and in a configuration in which a battery can be attached to the terminal, an assembly mechanism for detachably assembling the case for housing the board and the board, The terminal of the said board | substrate assembled | attached with the said case by the assembly | attachment mechanism, and the battery holding mechanism holding the said battery by a part of said case were provided.

  According to this configuration, when the substrates are assembled to the case, they are assembled so as not to be detached by the assembling mechanism, so that the substrate cannot be easily disassembled from the case. For this reason, it becomes possible to prevent illegal modification of the substrate. Further, since the battery is held by the terminal of the board assembled to the case and a part of the case by the assembling mechanism, a holder member is not separately required for holding the battery. Therefore, the structure of the board unit can be simplified. As described above, it is possible to achieve both the prevention of illegal modification of the substrate and the simplification of the battery holding structure.

  In the substrate unit, the assembly mechanism is preferably a caulking portion that caulks one of the case and the substrate and fixes the other to the other. According to this configuration, since the case and the substrate are fixed by the caulking portion, it is possible to attach and fix the case and the substrate firmly with a simple construction method.

  In the substrate unit, the battery holding mechanism includes a case side claw portion for positioning the battery in the thickness direction in the case, and a terminal side claw portion for positioning the battery in the thickness direction in the terminal. preferable. According to this configuration, since the battery is positioned in the thickness direction by the terminal-side claw portion and the case-side claw portion, it is possible to hold the battery without being displaced in the thickness direction.

  An electronic key that solves the above-mentioned problem has a board unit that can be attached to a terminal provided on the board, and can perform ID verification by wirelessly transmitting a key-specific electronic key ID to a communication master The board unit includes: a case for housing the board; and an assembly mechanism for detachably assembling the board; a terminal of the board assembled to the case by the assembly mechanism; and a part of the case; And a battery holding mechanism for holding the battery. According to this configuration, in the electronic key, it is possible to achieve both the prevention of illegal modification of the substrate and the simplification of the battery holding structure.

  According to the present invention, it is possible to achieve both prevention of illegal modification of the substrate and simplification of the battery holding structure.

The disassembled perspective view of the electronic key of one Embodiment. The perspective view of a board | substrate unit. Sectional drawing of a board | substrate unit. The top view of a board | substrate unit. (A)-(c) is process drawing which shows the assembly | attachment procedure of a board | substrate and a case. The conceptual diagram of the assembly mechanism of another example.

Hereinafter, an embodiment of a substrate unit and an electronic key will be described with reference to FIGS.
As shown in FIG. 1, the wireless key 1 is a vehicle key that wirelessly transmits an electronic key ID and an operation command by a narrow-range wireless (communication distance: several meters) when, for example, a momentary push type operation button 2 is operated. is there. The remote operation using the operation button 2 of the wireless key 1 includes, for example, locking / unlocking of a vehicle door (a passenger door, a luggage door, etc.) and opening / closing of a slide door. The wireless key 1 wirelessly transmits, for example, a radio wave in the UHF (Ultra High Frequency) band. The wireless key 1 is an example of an electronic key.

  The wireless key 1 includes a key body 3 that is held by a finger or the like, and a key plate 4 in which a key groove is formed. The housing of the key body 3 is formed by assembling an upper case 5 and a lower case 6, for example.

  A board unit 7 for the wireless key 1 is built in the key body 3. The board unit 7 is provided with a board 8 on which various electrical components of the board unit 7 are mounted, and a case 9 in which the board 8 is stored. On one surface of the substrate 8 (the back surface in FIG. 1), electrical components such as an IC (Integrated Circuit), an antenna, and a communication circuit are mounted. On the other side of the substrate 8 (the surface in FIG. 1), a terminal 11 is provided as an electrical connection destination of a battery (button battery) 10 serving as a power source for the wireless key 1. The terminal 11 includes a first terminal 12 and a second terminal 13 which are a plus / minus pair. The first terminal 12 is a + terminal and abuts so as to sandwich the outer peripheral surface of the battery 10. The second terminal 13 is a negative terminal and abuts against the plane of the back surface of the battery 10. The first terminal 12 and the second terminal 13 are fixed to the substrate 8 with, for example, solder.

  Substrate fixing claws 9a for fixing the substrate 8 to the case 9 are respectively provided at a plurality of (three in this example) corners of the case 9. A through hole 14 is provided at the center of the case 9 to allow the operation button 2 to reach the mounting surface of the substrate 8.

  At a position near the end of the case 9, a transponder 15 that can execute ID collation (immobilizer collation) with a vehicle by short-range wireless (communication distance: several centimeters to several tens of centimeters) is attached. The transponder 15 is attached in a state of being inserted into a transponder storage portion 16 provided at the end of the case 9. For immobilizer verification, for example, RFID (Radio Frequency IDentification) communication is used.

  As shown in FIG. 2, the substrate 8 is detachably attached to the substrate 8 by a heat caulking portion 18 formed by heat caulking the tip of a projecting portion 17 (see FIG. 1) protruding from the case 9. It is fixed. The heat caulking portion 18 includes a head portion 19 that is hooked in the thickness direction of the substrate 8 (Z-axis direction in FIG. 2), and a rod-like root portion 20 having a smaller diameter than the head portion 19. The heat caulking portion 18 is in a state of fixing the substrate 8 to the case 9 by passing the protruding portion 17 through the through hole 21 of the substrate 8 and then crushing the tip by the heat caulking method. The heat caulking portion 18 is an example of an assembly mechanism (caulking portion).

  The board unit 7 is provided with a battery holding mechanism 22 that holds the battery 10 in the attached state to the terminal 11. The battery holding mechanism 22 of this example includes a case side claw portion 23 protruding from a corner portion of the case 9 and a pair of terminal side claw portions 24 formed on the first terminal 12. The case side claw portion 23 and the terminal side claw portion 24 are disposed at both ends of the battery 10 in the diameter direction. The case-side claw portion 23 includes a root portion 25 extending in the height direction and a battery pressing portion 26 extending from the root portion 25 so as to bend in a substantially orthogonal direction. The pair of terminal side claw portions 24 also includes a root portion 27 and a battery pressing portion 28, similarly to the terminal side claw portion 24.

  The case 9 is provided with a terminal support wall 30 that supports one arm portion 29 of the first terminal 12 from behind. The case 9 is provided with a terminal support protrusion 32 that supports the other arm 31 of the first terminal 12 from the rear. The terminal support protrusion 32 is inserted into a through hole 33 penetrating the substrate 8.

  As shown in FIG. 3, the battery holding mechanism 22 presses the upper surface of the battery 10 with the battery holding part 26 of the case side claw part 23 and the battery holding part 28 of the terminal side claw part 24, thereby placing the battery 10 on the substrate. 8 and case 9. That is, the case-side claw portion 23 and the terminal-side claw portion 24 position the battery 10 in the height direction (Z-axis direction in FIG. 3) by the battery pressing portions 26 and 28 that hold the battery 10 from above.

  As shown in FIG. 4, a pair of battery holding walls 34 that hold the battery 10 in the planar direction (the XY plane direction in FIG. 4) stand upright at the corners of the case 9 on both sides of the case side claw 23. It is installed. The battery 10 is positioned in the planar direction by the pair of battery holding walls 34 and the pair of arms 29 and 31 of the first terminal 12. In addition, the planar direction of the battery 10 means a direction orthogonal to the direction in which the battery 10 is attached to the terminal 11, for example.

Next, the operation of the substrate unit 7 will be described with reference to FIG.
As shown in FIG. 5A, in order to assemble the substrate 8 and the case 9, first, the mounting surface of the substrate 8 faces the case 9, and the protruding portion 17 of the case 9 and the through hole 21 of the substrate 8 Adjust the position of. As shown in FIG. 5 (b), the protrusion 17 is passed through the through hole 21 and the substrate 8 and the case 9 are assembled. As shown in FIG. 5 (c), the substrate 8 is fixed to the case 9 by crushing the tip of the projecting portion 17 with a jig 35 or the like by a heat caulking method, that is, forming a heat caulking portion 18.

  Thus, in the case of this example, since the board | substrate 8 and the case 9 are fixed by the heat caulking part 18, these will be assembled | attached so that removal is impossible. For this reason, for example, even if a third party tries to remodel the electrical components on the mounting surface of the substrate 8 and disassemble the substrate 8 and the case 9, they cannot be separated. Therefore, the assembly structure of the present example in which the substrate 8 and the case 9 are assembled by heat caulking is highly effective in preventing illegal modification of the substrate 8 (wireless key 1).

  Further, the battery holding mechanism 22 of this example is held by the terminal side claw portion 24 of the first terminal 12 provided on the substrate 8 and the case side claw portion 23 provided on the case 9 integrally fixed to the substrate 8. It is a structure to do. For this reason, when holding the battery 10 attached to the terminal 11, a holder member is not required separately. Therefore, the structure of the battery holding mechanism 22 and, in turn, the structure of the wireless key 1 can be simplified. This is also effective in reducing the number of parts and is advantageous in reducing costs.

According to the configuration of the present embodiment, the following effects can be obtained.
(1) The substrate 8 and the case 9 are attached and fixed in a non-removable manner by a heat caulking portion 18 formed by processing a part of the case 9. For this reason, since the board 8 cannot be easily disassembled from the case 9, illegal modification of the board 8 can be prevented. The battery holding mechanism 22 has a structure that holds the battery 10 by a terminal side claw portion 24 provided in the first terminal 12 and a case side claw portion 23 provided in a corner portion of the case 9. For this reason, since it becomes possible to hold | maintain the battery 10 with the shape of the case 9 and the 1st terminal 12, when holding the battery 10, a holder member is not required separately. Therefore, the structure of the battery holding mechanism 22 can also be simplified.

(2) Since the illegal prevention structure of the substrate 8 and the holding structure of the battery 10 are integrated, it is advantageous for downsizing and thinning of the product shape.
(3) The substrate 8 and the case 9 are integrally fixed so as not to be detached by the heat caulking portion 18. Therefore, the substrate 8 and the case 9 can be attached and fixed firmly by a simple construction method.

  (4) The battery holding mechanism 22 has a structure in which the battery 10 is positioned in the thickness direction by the terminal side claw portion 24 and the case side claw portion 23. Therefore, it is possible to hold the battery 10 so that it is difficult to shift in the thickness direction.

(5) Since the battery holding walls 34 for positioning the battery 10 in the planar direction are provided on both sides of the case side claw portion 23, the battery 10 can be made difficult to be displaced in the planar direction.
(6) The case 9 is provided with a terminal support wall 30 and a terminal support protrusion 32 that support the arm portions 29 and 31 of the first terminal 12 later. Therefore, when the battery 10 is attached to the terminal 11, even if a tension is applied from the battery 10 to the first terminal 12, the first terminal 12 can be made difficult to peel off from the substrate 8.

Note that the embodiment is not limited to the configuration described so far, and may be modified as follows.
As shown in FIG. 6, the assembly mechanism may have a structure in which the substrate 8 is detachably assembled to the case 9 by the assembly pins 41. In this case, the substrate 8 is integrated with the case 9 by engaging the pair of claws 42 at the tip of the flexible mounting pin 41 with the projections 43 of the case 9 with the substrate 8 sandwiched therebetween. Assemble. Thus, various structures can be employed for the assembly mechanism.

A plurality of operation buttons 2 may be provided.
The position of the battery 10 may be held by a part (shape) of the housing of the wireless key 1.

The number of the battery holding walls 34 is not limited to two, and may be one, for example, or three pairs.
-Case side nail | claw part 23 is not restricted to being formed in the corner part of case 9, but if it is on case 9, it may be formed anywhere.

-The terminal side nail | claw part 24 is not restricted to the base vicinity of the arm parts 29 and 31, and can be changed into other positions, such as a front-end | tip, for example.
-The number of terminal side claw parts 24 is not limited to two, for example, may be one, or may be three or more.

As long as the battery holding mechanism 22 can hold the battery 10 in the shape of the case 9 and the terminal 11, various shapes and structures can be adopted.
The battery holding mechanism 22 may have a structure that can hold the battery 10 in the planar direction. The battery holding mechanism 22 may have a structure capable of holding the battery 10 in both the thickness direction and the planar direction.

The battery 10 is not limited to a button battery but can be changed to other types such as a dry battery. Further, the battery 10 may be either a primary battery or a secondary battery.
The heat caulking portion 18 is not limited to being provided on the case 9 side, and may be provided on the substrate 8 side, for example.

-For caulking, it is possible to adopt other methods other than heat caulking.
The electronic key is not limited to the wireless key 1 and may be, for example, a smart key (R) that performs ID verification (smart verification) by narrow-band radio in response to communication from a vehicle.

The board unit is not limited to being used for an electronic key, but can be applied to other devices and apparatuses.
Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects.

  (A) In the substrate unit, the case is provided with a battery holding wall for positioning the battery in a planar direction on both sides of the case side claw portion. According to this configuration, it is possible to make it difficult for the battery to be displaced in the planar direction.

  (B) In the substrate unit, the case is provided with a terminal support portion for supporting the terminal later. According to this configuration, it is possible to make the terminal difficult to peel off from the substrate.

  DESCRIPTION OF SYMBOLS 1 ... Wireless key as an electronic key, 7 ... Board | substrate unit, 8 ... Board | substrate, 9 ... Case, 10 ... Battery, 11 (12, 13) ... Terminal, 18 ... Thermal caulking part as an assembly | attachment mechanism (caulking part), 22 ... Battery holding mechanism, 23 ... Case side claw, 24 ... Terminal side claw.

Claims (4)

In a board unit in which a terminal is provided on a board and a battery can be attached to the terminal,
An assembly mechanism for detachably assembling the case for housing the substrate and the substrate;
A board unit comprising: a terminal of the board assembled to the case by the assembling mechanism; and a battery holding mechanism for holding the battery by a part of the case. The board unit according to claim 1, wherein the assembly mechanism is a caulking portion that caulks one of the case and the board and fixes the other to the other. The battery holding mechanism includes a case side claw for positioning the battery in the thickness direction in the case, and a terminal side claw for positioning the battery in the thickness direction in the terminal. Item 3. The substrate unit according to Item 1 or 2. In an electronic key that has a board unit to which a battery can be attached to a terminal provided on the board and can perform ID verification by wirelessly transmitting a key-specific electronic key ID to a communication master,
The substrate unit is
An assembly mechanism for detachably assembling the case for housing the substrate and the substrate;
An electronic key comprising: a terminal of the substrate assembled to the case by the assembly mechanism; and a battery holding mechanism for holding the battery by a part of the case.