JP2007224664A - Strength reinforcing structure of electronic key - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a strength reinforcing structure of an electronic key securing the appearance of a casing of the electronic key without adding new parts for strength reinforcement even if aiming at the strength reinforcement of the casing of the electronic key following thinning of the electronic key, for instance. <P>SOLUTION: A substrate 27 of a portable unit 2 is built in a body case 13 of the portable unit 2. A receiving antenna 31 of the portable unit 2 is mounted to the substrate 27. The receiving antenna 31 is formed of a loop antenna with an antenna wire 31b annularly wound around an antenna bobbin 31a. The antenna bobbin 31a is formed into a solid body with no cavity at its inner peripheral part by being formed in approximately plate shape, and such a shape forms a thick-walled part 31x. The inside of the body case 13 is placed in a state of the internal space being filled with this thick-walled part 31x. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a strength reinforcing structure for an electronic key that can wirelessly transmit a key-specific identification code.

  In recent years, hands-free systems that allow a vehicle to be locked / unlocked and start an engine (for example, patents) can be used on many vehicles without having to actually perform key operations using vehicle keys. Document 1 etc.) is installed. 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 FIG. 5, a substrate (PC board) 84 on which various elements (electronic components) 83 for the portable device 81 are mounted is built in a hollow body case 82 of the portable device 81. A substantially ring-shaped antenna bobbin 85 is attached to the substrate 84. The antenna wire 86 of the portable device 81 is wound around the outer periphery of the antenna bobbin 85. The portable device 81 receives the LF signal transmitted from the vehicle via the antenna line 86, and in response thereto, returns the ID code of the portable device 81 from the transmitting antenna (not shown) to the vehicle.
JP 2002-029385 A

  By the way, as a request for the portable device 81, there are, for example, a reduction in thickness and a reduction in size. However, when a reduction in thickness and a reduction in size is made to meet this request, it is necessary to reduce the thickness of the main body case 82 accordingly. . As described above, when the thickness of the main body case 82 is reduced, for example, when a large external force (arrow F in FIG. 5) is applied to the main body case 82, the main body case 82 becomes bent due to the external force. The part may come into contact with the various elements 83 and the element 83 may break down or be damaged, and further, the main body case 82 may be broken and the main body case 82 may be damaged.

  As a countermeasure for avoiding this, as shown in FIG. 6, a structure in which a mold material 87 is filled in a space formed in the inner peripheral portion of the antenna bobbin 85 and the main body case 82 is supported from the inner surface by the mold material 87 is conceivable. However, this method increases the material cost by adding the molding material 87, increases the manufacturing cost when filling the molding material 87, adversely affects the characteristics of the electronic component by the molding material 87, and expands and contracts the molding material 87. The entire product (main body case 82) is caused to bend (bend), and this countermeasure is not practical.

  As another countermeasure, as shown in FIG. 7, a structure in which a thick portion 88 is provided on the inner surface of the main body case 82 and the main body case 82 is partially thickened and reinforced by the thick portion 88 can be considered. However, in this method, since the sink of the surface of the main body case 82 occurs in the thick portion 88 and the appearance of the product (the portable device 81) deteriorates, the molding material 87 is used. As with the structure of, this measure is not practical.

  The object of the present invention is to add strength to the casing of the electronic key, for example, as the electronic key is made thinner, and to add a new component for reinforcing the strength, and to ensure the appearance of the casing. An object of the present invention is to provide an electronic key strength reinforcing structure.

  In order to solve the above-described problems, according to the present invention, an electronic key of a wireless communication part is built in a housing and performs wireless communication with a key communication target via an antenna of the wireless communication part. The gist of the strength reinforcing structure is that the wireless communication component is provided with a reinforcing portion that reinforces the strength of the casing by supporting the casing from the back side.

  According to this configuration, since the wireless communication component existing inside the casing has a strength reinforcing function, for example, a reinforcing method for filling the casing with a resin mold or a thickness of the casing is provided. There is no need to use a reinforcing method to ensure strength. For this reason, for example, even if the strength of the electronic key is reinforced with the thinning of the electronic key, if the wireless communication component has a strength reinforcing function as in the present invention, without adding a new component, Moreover, it is possible to reinforce the strength of the casing and thus the electronic key while ensuring the appearance of the casing.

According to the present invention, the wireless communication component is an antenna bobbin that supports an antenna line of the antenna.
According to this configuration, since this type of antenna bobbin often uses a hard material, if the antenna bobbin has a function of reinforcing the strength of the housing, the bending resistance (high rigidity) of the housing is ensured. Therefore, the effect of securing the strength of the casing (ie, the electronic key) is high.

  The gist of the present invention is that the antenna is a loop antenna in which an antenna wire is wound in an annular shape, and the reinforcing portion is formed on an antenna bobbin of the loop antenna.

  According to this configuration, as a type of antenna, for example, there is a bar antenna in which an antenna wire is wound around a core component such as ferrite, and the antenna bobbin of this type of bar antenna can also have a function of reinforcing the strength of the housing It is. However, in this case, if a strong force is applied to the antenna bobbin, the possibility of damage to the core inside the bobbin cannot be denied, and it is not preferable to reinforce the strength with the antenna bobbin of this type of bar antenna. However, in the present invention, since the strength reinforcing function is provided to the antenna bobbin of the loop antenna that does not require the use of the core component, it is not necessary to take into consideration the problem of the core component breakage.

  According to the present invention, the antenna is a triaxial antenna composed of three antennas whose directivities are shifted from each other by 90 degrees, and the reinforcing portion is an antenna of a loop antenna that constitutes one of the three axes. The gist is that it is formed on the bobbin.

  According to this configuration, since a three-axis antenna is used as the antenna, the antenna characteristics of the electronic key are higher than those of, for example, a single axis, and a communication error hardly occurs between the electronic key and the key communication target.

According to this invention, while the said housing | casing comprises flat plate shape, the said reinforcement part is formed over the planar direction of the said housing | casing according to the shape of the said housing | casing.
According to this configuration, when the casing is flattened by reducing the thickness of the casing (that is, the electronic key), the bending rigidity of the casing is reduced accordingly. However, in this example, the reinforcing portion is formed along the flat plate shape of the casing in the planar direction of the casing, so even if the casing is thinned and the casing becomes thin, this shape It becomes possible to reinforce the strength against bending of the housing, and it is possible to achieve both reduction in thickness of the housing and securing of strength.

  According to the present invention, the antenna is fixed to the substrate of the wireless communication component, and the reinforcing portion covers the electronic component of the electronic key provided on the substrate in the attached state of the antenna. Is the gist.

  According to this configuration, when the antenna is attached to the substrate, the reinforcing portion provided in the antenna covers the electronic component existing on the substrate. For this reason, the reinforcing part is in a state of protecting the electronic component on the board, and when an external force is applied to the electronic key, it is difficult for the impact to be transmitted to the electronic component, which is effective in preventing damage and failure of the electronic component. high.

  According to the present invention, for example, even if the strength of the casing of the electronic key is increased with the thinning of the electronic key, no new parts for reinforcing the strength are added, and the appearance of the casing can be secured. .

Hereinafter, an embodiment of an electronic key strength reinforcement 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 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 being a + side contact terminal 24a and the other being a − side contact terminal 24b. The + side contact terminals 24 a and 24 b are integrally formed with the frame 16 by being insert-molded with respect to the frame 16, and are in an attached state in which they are arranged side by side in the thickness direction of the frame 16.

  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 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.

  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... A plurality of protrusions 35 (see FIG. 4) are provided on the back surface of the antenna bobbin 31a 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. The reception antenna 31 constitutes a wireless communication component and an antenna.

  As shown in FIG. 3, at a position where the antenna bobbin 31a is covered on the substrate 27, a control IC (Integrated Circuit) 36 for overall control of the portable device 2 and a reception IC 37 for demodulating the LF signal received by the reception antenna 28. Various elements (components) such as are mounted. The receiving antennas 29 and 30 are also arranged on the substrate 27 at positions where they are covered by the antenna bobbin 31a.

  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. The reception antennas 29 and 30, the control IC 36, and the reception IC 37 constitute electronic components.

  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 terminals 24a and 24b are attached to the substrate 27 in 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, and one end of the − side contact terminal 24b is fixed to the land 38a. It is soldered and fixed to the land 38b by spot welding. Thus, since the + side contact terminals 24a and 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 is fixedly attached to the frame 16 by an adhesive surface obtained by bonding the periphery of the antenna bobbin 31a to the inner peripheral surface of the mounting recess 25 and a soldering surface of the lands 38a and 38b.

  As shown in FIG. 4, the antenna bobbin 31 a of the loop antenna is formed in a flat plate shape so that a thick part 31 x is formed in the central part, and its height H is between the upper plate member 14 and the substrate 27. Designed to be equivalent to height. In addition, the thick portion 31x is formed in a single area in the plane direction of the main body case 13 according to the shape of the main body case 13. As a result, when the antenna bobbin 31a of the present example is in the mounted state accommodated in the main body case 13, the upper plate member 14 is moved from the rear surface side on the surface 31d of the thick portion 31x (upper surface in FIG. 4). To support. For this reason, the inside of the case of the portable device 2 is in a state in which a gap inside the case is filled with a substantially flat antenna bobbin 31a.

  Further, on the back surface 31e (the lower surface in FIG. 4) of the antenna bobbin 31a, there are component housing portions 39, 39... For housing various elements such as the receiving antennas 29, 30 provided on the substrate 27, the control IC 36, and the receiving IC 37. A plurality of recesses are provided. In the component housing portion 39, a room may be independently defined for each of various elements, or a plurality of rooms may be connected. Various elements on the substrate 27 are covered by the antenna bobbin 31a when the antenna bobbin 31a is attached to the substrate 27. The thick part 31x corresponds to the reinforcing part.

  Now, in this example, the antenna bobbin 31a of the receiving antenna 31 (that is, the loop antenna) is formed into a flat body by making it a solid body, and the main body is formed by the thick portion 31x of the antenna bobbin 31a that can be formed by the solid body. The gap inside the case 13 is filled. Thereby, the antenna bobbin 31a supports the plate material 14 from the back surface side, and the strength against bending of the main body case 13 is reinforced. Therefore, even if the main body case 13 is formed thin in order to reduce the thickness of the portable device 2, the main body case 13 is reinforced by the antenna bobbin 31a. It is possible to achieve a balance with securing.

  Moreover, if the thickened portion 31x is formed as in this example to reinforce the strength of the main body case 13, for example, various problems that may occur when strength is strengthened using a molding material, for example, significant cost due to the addition of parts. There is no need to consider problems such as up, adverse effects on various elements (components) on the substrate 27, and occurrence of bending caused by expansion and contraction of the mold material. Furthermore, it is not necessary to consider various problems that may occur when strength is strengthened by increasing the thickness of the plate member 14, that is, problems such as the occurrence of sink marks on the surface of the main body case. As a result, it is possible to reinforce the strength of the portable device 2 that has been reduced in thickness without causing problems such as a significant cost increase due to the addition of components, adverse effects on various elements, and deterioration in the appearance of the portable device 2. Become.

According to the configuration of the present embodiment, the following effects can be obtained.
(1) By forming the antenna bobbin 31a of the loop antenna type receiving antenna 31 into a flat plate shape, a thick part 31x is formed in the antenna bobbin 31a, and the gap inside the main body case 13 is filled with the thick part 31x. I made it. Thereby, the antenna bobbin 31a supports the back surface of the plate member 14, and the strength against bending of the thinned main body case 13 can be reinforced. Further, if the antenna bobbin 31a has a strength reinforcing function, the strength of the main body case 13, that is, the portable device 2 does not occur without causing various problems such as a significant increase in cost, adverse effects on various elements, and a bad appearance of the portable device 2. Can be reinforced.

  (2) Since this type of antenna bobbin 31a often uses a hard resin material, a high bending strength (high rigidity) of the main body case 13 can be secured if the antenna bobbin 31a has a strength reinforcing function. Thus, the effect of securing the strength of the main body case 13 is high.

  (3) Since the antenna bobbin 31a of the receiving antenna 31 formed of a loop antenna is provided with a function of reinforcing the strength of the main body case 13, this type of loop antenna does not have a built-in core inside the bobbin. There is no problem that the core is broken inside the bobbin when an external force is applied to 31a. Therefore, if the loop antenna is provided with a strength reinforcing function as in this example, the problem of core breakage is not taken into consideration.

  (4) Since the receiving antenna 28 of the portable device 2 is compatible with the three axes of the XYZ axes, the antenna characteristics of the receiving antenna 28 of the portable device 2 should be made higher than, for example, those corresponding to one axis. It is possible to make it difficult to generate a communication error between the vehicle 1 and the portable device 2.

  (5) When the antenna bobbin 31a is attached to the substrate 27, the various elements on the substrate 27 are attached with the antenna bobbin 31a. For this reason, various elements on the substrate 27 are protected by the antenna bobbin 31a, and various problems such as breakage and failure of the elements can be made difficult to occur.

  (6) By forming the antenna bobbin 31a with substantially the same area as the substrate 27, the antenna bobbin 31a supports the substantially entire surface of the substrate 27. For this reason, the bending resistance strength (rigidity) of the substrate 27 can be reinforced, and even if the substrate 27 is formed thin in order to further reduce the thickness of the portable device 2, the strength of the substrate 27 is increased by the antenna bobbin 31a. Can be secured.

Note that the present embodiment is not limited to the above configuration, and may be changed to the following modes.
The strength reinforcing function of the main body case 13 (the portable device 2) does not necessarily have to be provided to the antenna bobbin 31a of the receiving antenna 31 that is a loop antenna. For example, the bobbin of the receiving antennas 29 and 30 formed of a bar antenna may have a strength reinforcing function. In addition, it is not always necessary to provide only the receiving antenna 31 with the strength reinforcing function, and any of the receiving antennas 29 to 31 can be selected as appropriate as to which of the receiving antennas 29 to 31 has the strength reinforcing function.

  The strength reinforcing function of the main body case 13 is not necessarily limited to the antenna system parts of the receiving antennas 29 to 31. For example, elements on the substrate 27 or the substrate 27 itself may have this function.

  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 may be used about the engine starting function about 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.
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 1-6, the said antenna is a receiving antenna which can receive the signal transmitted from the said key communication object. In this case, the strength of the housing can be reinforced by the antenna bobbin of the receiving antenna.

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 longitudinal cross-sectional view which shows the internal structure of a portable machine. The longitudinal cross-sectional view which shows the internal structure of the conventional portable machine. The longitudinal cross-sectional view which shows the inside of a portable machine at the time of filling the inside of a portable machine with the molding material. The longitudinal cross-sectional view which shows the inside of a portable machine at the time of thickening the case of a portable machine.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Vehicle as a key communication object, 2 ... Portable machine as an electronic key, 13 ... Main body case as a housing | casing, 27 ... Board | substrate, 29 ... Receiving antenna which comprises an electronic component, 30 ... Receiving antenna which comprises an electronic component , 31: Receiving antenna constituting radio communication component and antenna, 31x: Thick portion as reinforcing portion, 31a ... Antenna bobbin, 31b ... Antenna wire, 36 ... Control IC constituting electronic component, 37 ... Constructing electronic component Receiving IC.

Claims (6)

In the strength reinforcement structure of the electronic key that has a wireless communication component built in the housing and performs wireless communication with the key communication target via the antenna of the wireless communication component,
A strength reinforcing structure for an electronic key, wherein the wireless communication component is provided with a reinforcing portion that reinforces the strength of the casing by supporting the casing from the back side thereof.   2. The electronic key strength reinforcing structure according to claim 1, wherein the wireless communication component is an antenna bobbin that supports an antenna wire of the antenna.   3. The electronic key according to claim 1, wherein the antenna is a loop antenna in which an antenna wire is wound in a ring shape, and the reinforcing portion is formed on an antenna bobbin of the loop antenna. Strength reinforcement structure.   The antenna is a three-axis antenna composed of three antennas whose directivities are shifted by 90 degrees from each other, and the reinforcing portion is formed on an antenna bobbin of a loop antenna that constitutes one of the three axes. The strength reinforcing structure for an electronic key according to any one of claims 1 to 3.   The said housing | casing comprises flat plate shape, The said reinforcement part is formed over the planar direction of the said housing | casing according to the shape of the said housing | casing, The any one of Claims 1-4 characterized by the above-mentioned. The electronic key strength reinforcing structure according to claim 1. The antenna is fixed to a substrate of the wireless communication component, and the reinforcing portion covers an electronic component of the electronic key provided on the substrate when the antenna is attached. The strength reinforcement structure of the electronic key as described in any one of 1-5.

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