JP3782067B2 - Vehicle key device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle key device having a structure that is preferably used for an immobilizer for preventing theft of a vehicle such as an automobile.
[0002]
[Prior art]
A transponder is provided on the key for starting the prime mover of a vehicle equipped with a prime mover such as an automobile, and a coil for electromagnetic coupling by electromagnetic induction is provided on the key cylinder portion on the vehicle body side where the key is inserted, and the key is inserted into the key cylinder. When the identification information is collated by transmitting and receiving electromagnetic signals that have undergone predetermined signal modulation between the coil on the vehicle body side and the transponder provided on the key, and the identification information matches There is known a vehicular key device having an immobilizer function that is configured so that a prime mover is started only at the first position. As a technique related to a vehicle key device having such an immobilizer function, for example, Patent Document 1 discloses the following configuration.
[0003]
That is, this conventional vehicle key device includes an immobilizer coil, a soft ferrite member, and a cylindrical case covering these on the key insertion hole side of the key cylinder. Here, the soft ferrite member is formed in an annular shape coaxial with the key cylinder so as to be along the outer peripheral portion of the key insertion hole of the key cylinder, and the annular shape is formed in the circumferential middle portion of the front surface facing the outside of the key cylinder. A groove is provided, and a straight groove is formed on the front side. The coil is an air core coil that is coaxial with the key cylinder and is accommodated in the annular groove of the soft ferrite member, and the winding wire at the beginning and end of winding of the coil extends from the straight groove to the soft ferrite member. It is pulled out to the outer peripheral side. And the conducting wire of the coil pulled out to the outer peripheral side of the soft ferrite member is connected to the immobilizer unit.
[0004]
[Patent Document 1]
JP 2002-309814 A (page 5, FIG. 10)
[0005]
[Problems to be solved by the invention]
Here, the conducting wire which comprises a coil is a thing with low intensity | strength only apply | coating the insulating film to the conductive wire with a thin wire diameter. Therefore, when the coil is assembled or after assembly, the conductive wire drawn out of the coil comes into contact with the edge of the soft ferrite member or other peripheral components, so that the insulation film of the conductive wire is peeled off and becomes electrically conductive, or There was a possibility that the lead wire itself was cut. Therefore, a high level of skill is required for the worker to prevent damage to the conductors during coil assembly work, and the conductors are still in contact with surrounding components such as edges of the soft ferrite member even after the coil is assembled. A configuration was needed to prevent damage.
[0006]
The present invention has been made in view of the above problems, and facilitates the assembly work of the immobilizer coil and its peripheral portion in the vehicle key device, and damages to the coil conductors during and after the assembly. Therefore, it is a technical problem to ensure electrical insulation of the coil conductors.
[0007]
[Means for Solving the Problems]
The characteristic configuration described in claim 1 of the vehicle key device according to the present invention for solving the above-described problem is arranged on a coil for receiving a signal from a transponder provided in the key, and on the back side of the coil. The ferrite member, the substrate disposed on the back side of the ferrite member and connected to the end of the lead wire drawn from the coil, and the insulation disposed between the coil and the ferrite member to fix them together A double-sided pressure-sensitive adhesive sheet, and the double-sided pressure-sensitive adhesive sheet is provided with a protective part formed so as to protrude from the periphery of the ferrite member at least at a position where the conductive wire of the coil is drawn.
[0008]
Thereby, while being able to fix the said coil and a ferrite member easily, the insulation between these can also be ensured. In addition, it is only necessary to connect the end of the lead wire drawn out of the coil to the board, and the distance for routing the lead wire can be shortened, so that the lead wire can be handled easily and prevented from being damaged during the coil assembly operation. Can do.
[0009]
Furthermore, the lead wire drawn out from the coil is protected so as not to directly contact the ferrite member, particularly the edge portion, by the protective portion of the double-sided pressure-sensitive adhesive sheet formed so as to protrude from the periphery of the ferrite member. Therefore, it is possible to prevent the conductor from being damaged both when the coil is assembled and after it is assembled. Therefore, electrical insulation between the coil and its conductor can be ensured.
[0010]
According to a second aspect of the key device for a vehicle according to the present invention, in the configuration according to the first aspect, the protective part of the double-sided pressure-sensitive adhesive sheet is formed from the periphery of the main body part of the double-sided pressure-sensitive adhesive sheet. It is in the point comprised by the tongue piece extended in the drawing-out direction of conducting wire.
[0011]
Thereby, in addition to the operational effects of the characteristic configuration according to claim 1, the protective portion can be configured to cover particularly the edge portion of the ferrite member at a position where the conducting wire is drawn from the coil. The lead wire drawn out from the coil can be reliably protected to prevent its damage.
[0012]
The characteristic configuration described in claim 3 of the vehicle key device according to the present invention is the configuration described in claim 1 or 2, wherein the protective part of the double-sided pressure-sensitive adhesive sheet has adhesiveness and is drawn out of the coil. The conductive wire is adhesively fixed to one or both of the ferrite member and the substrate via the protective part.
[0013]
Thereby, in addition to the effect by the characteristic structure of the said Claim 1 or 2, while attaching the protection part of the said double-sided adhesive sheet to the said ferrite and one or both of the said board | substrates, it was pulled out from the said coil The conductive wire can be fixed to the vicinity of the land to which the end portion of the conductive wire of the substrate is connected only by fixing the conductive wire to the protective part of the double-sided pressure-sensitive adhesive sheet. Therefore, it is possible to facilitate the soldering operation of the end portion of the conducting wire, and it is possible to prevent the conducting wire from moving and coming into contact with surrounding constituent members, particularly the edges of the ferrite member. The assembling work can be facilitated and the coil conductor can be surely protected.
[0014]
According to a fourth aspect of the vehicle key device of the present invention, in the configuration according to any one of the first to third aspects, the ferrite member is disposed coaxially with the coil. In that it has a larger outer diameter.
[0015]
Thereby, in addition to the operational effect of the characteristic configuration according to any one of claims 1 to 3, the spread of the magnetic field from the coil to the transponder side, that is, the front side of the coil is increased. And the sensitivity of the coil can be increased. The configuration of the present invention is particularly suitable when the ferrite member has an outer diameter larger than that of the coil, and the edge of the ferrite exists in the direction in which the conductive wire is drawn from the coil. .
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a vehicle key device according to the present invention will be described with reference to the drawings. In this embodiment, it is a key device for starting and stopping the engine of an automobile, around the front side (key insertion hole 3a side) of a key cylinder 3 into which a key 2 provided with a transponder 1 is inserted. A vehicle key device that includes the coil 4, the ferrite member 5, and the substrate 6 and that functions as an antenna of the immobilizer system will be described. FIG. 1 is an exploded perspective view for explaining a configuration of a vehicle key device according to the present embodiment, and FIG. 2 is a perspective view showing a completed state of the vehicle key device according to the present embodiment. 3 is a perspective view illustrating a state in which the coil 4, the ferrite member 5, and the substrate 6 of the vehicle key device according to the present embodiment are assembled to each other.
[0017]
As shown in these drawings, the vehicle key device according to the present embodiment includes a key cylinder 3 that allows a rotation operation around the axis A with the physically matching key 2 inserted, and a key 2. A coil 4 for receiving a signal from the transponder 1 provided, a ferrite member 5 disposed on the back side of the coil 4, and an end of a conductor 7 disposed on the back side of the ferrite member 5 and drawn from the coil 4 Covering the periphery of the coil 6, the ferrite member 5 and the substrate 6, the insulating double-sided pressure-sensitive adhesive sheet 8 which is arranged between the coil 6 and the ferrite member 5 and fixes them together. And a cover 9. In the description of the present embodiment, “front” refers to a surface with respect to the transponder 1, and “rear surface” refers to a surface opposite to the front.
[0018]
As shown in FIG. 2, the key 2 has a metal insertion portion 2a inserted into the key cylinder 3, and a synthetic resin base 2b provided at the rear end of the insertion portion 2a. The base 2b is provided with a transponder 1. The transponder 1 is a device that outputs a specific identification signal in response to a request signal that is an electromagnetic signal transmitted from the coil 4. This identification signal includes identification information for identifying whether or not the key 2 is suitable for the vehicle. As the configuration of the transponder 1, various known configurations having a function of outputting an identification signal including preset identification information in response to a request signal that is an electromagnetic signal transmitted from the coil 4 can be used. It is. Therefore, for example, as disclosed in Japanese Patent Laid-Open No. 63-93649, the transponder 1 includes a coil for electromagnetic coupling and a capacitor connected in parallel thereto, and resonates in response to a signal of a predetermined frequency. In addition to the resonance circuit in which the transponder 1 has a coil for electromagnetic coupling and a capacitor connected in parallel thereto, as shown in Japanese Patent Laid-Open No. 9-170366, A configuration in which a current induced by electromagnetic coupling of a coil for electromagnetic coupling is rectified by a rectifier circuit, supplied to a control circuit and a storage device such as an EEPROM that stores specific identification information, and an identification signal including identification information is output. It can be.
[0019]
The key cylinder 3 has a mechanism that allows a rotation operation around the axis A in a state where the physically compatible key 2 is inserted, and physically restricts the rotation operation in a state where the non-compatible key 2 is inserted. A cylindrical device is provided with a key insertion hole 3a for inserting the key 2 along the axis A. Then, the physically matching key 2 is inserted in the key insertion hole 3a, and as shown in FIG. 2, the L position (lock position), the Acc position (accessory position), the ON position (on position), It is possible to freely rotate each position of the ST position (start position). Therefore, characters indicating the respective operation positions are printed on the cover 9.
[0020]
The coil 4 is formed by winding a polyester wire (PEW) formed by coating a copper wire with a polyester resin, a polyurethane wire (UEW) formed by coating a copper wire with a polyurethane resin, etc., in an air ring shape. It is formed by retaining with resin or the like. In addition, the lead wires 7 at the start and end portions of the coil 4 are drawn to the outer peripheral side of the annular coil 4 in order to connect to the substrate 6. The coil 4 is disposed around the key insertion hole 3 a on the front side of the key cylinder 3. The coil 4 transmits a request signal which is an electromagnetic signal for requesting an identification signal to the transponder 1 and receives an identification signal output from the transponder 1 in response to the request signal. (See FIG. 7). The configuration of the coil 4 is not limited to that shown in this embodiment. For example, the coil 4 is not formed as an air core, but is formed in an annular shape by winding a conducting wire 7 around a bobbin (not shown). It is also possible to use things. However, in this case, in order to prevent the conductor 7 from coming into contact with the edge of the bobbin and damaging the bobbin, use a bobbin having a shape that does not have an edge on the path through which the conductor 7 of the coil 4 is drawn. Is desirable.
[0021]
Here, the ferrite member 5 is formed in an annular shape having an outer diameter larger than the coil 4 and an inner diameter substantially the same as or slightly smaller than the coil 4. Further, as the material of the ferrite member 5, it is preferable to use soft ferrite exhibiting soft magnetism. The ferrite member 5 is disposed on the back side of the coil 4 and coaxially with the coil 4. Here, the coil 4 and the ferrite member 5 are fixed by using a double-sided pressure-sensitive adhesive sheet 8 described later. Thus, the ferrite member 5 is disposed so as to cover the entire back surface of the annular coil 4, and the magnetic field generated from the coil 4 is efficiently applied to the opposite side of the ferrite member 5, that is, the front side of the coil 4. Therefore, the sensitivity at the time of signal transmission / reception with the transponder 1 can be increased. As a material for the ferrite member 5, hard ferrite can be used.
[0022]
The substrate 6 is formed by forming a predetermined wiring pattern on an insulating material such as glass epoxy by the technique of printed wiring, and the outer shape thereof is larger than the outer shape of the ferrite member 5, and the central portion has the above-mentioned The ferrite member 5 is formed in a shape provided with a circular hole 6 a having a diameter smaller than the inner diameter of the ferrite member 5. More specifically, in the present embodiment, the outer shape of the substrate 6 is substantially the same as the shape of the cross section perpendicular to the axis A of the key cylinder 3. The substrate 6 is arranged on the back side of the ferrite member 5 so that the central circular hole 6 a is coaxial with the coil 4 and the ferrite member 5. Here, the substrate 6 and the ferrite member 5 are fixed using an adhesive. In addition, it is also possible to employ a double-sided PSA sheet for these fixations.
[0023]
Further, a land 6b for connecting the end of the conductive wire 7 drawn from the coil 4 is provided outside the outer peripheral edge of the ferrite member 5 on the front surface of the substrate 6, and the ferrite member is provided on the front side of the substrate 6. In the state where the coil 4 is fixed to the front side of the ferrite member 5 via the double-sided pressure-sensitive adhesive sheet 8, the end portion of the conductor 7 is connected to the land 6b by soldering. In addition to the land 6b, various chips such as resistors and capacitors are fixed to the front or back surface of the substrate 6 by soldering. A cord 11 connected to the immobilizer unit 10 (see FIG. 7) is fixed to the back surface of the substrate 6 by soldering, and is disposed along the key cylinder 3.
[0024]
The double-sided pressure-sensitive adhesive sheet 8 is a sheet-like member that is disposed between the coil 4 and the ferrite member 5 and has both surfaces as adhesive surfaces in order to fix them together. In the present embodiment, as shown in FIG. 4, the double-sided pressure-sensitive adhesive sheet 8 has a planar shape formed by protruding a tongue-shaped protective portion 8 b on a part of the annular body portion 8 a, As shown in FIG. 5 which is an XX cross-sectional view of FIG. 4, the adhesive portion 8d is provided on both surfaces of the sheet portion 8c constituting such a planar shape. Moreover, in the state before assembly | attachment, the release paper 12 is affixed so that the surface may be covered in order to protect the adhesion part 8d. And the material which comprises the sheet | seat part 8c of this double-sided adhesive sheet 8 shall be an insulating material, and specifically, a polyethylene terephthalate, polyester, etc. are used suitably. Further, the material of the adhesive portion 8d of the double-sided pressure-sensitive adhesive sheet 8 is a material that can be obtained with a strong adhesive force with little change over time. For example, an acrylic adhesive is preferably used. In addition, the material which comprises the double-sided adhesive sheet 8 is not limited to these, The material which can adhere and fix the coil 4 and the ferrite member 5, and can ensure the insulation between these Can be used.
[0025]
And in this embodiment, the shape of this double-sided pressure-sensitive adhesive sheet 8 is such that the shape of the main body portion 8a is substantially the same as the shape of the front surface of the ferrite member 5, that is, the outer diameter and substantially the same as the ferrite member 5. It is formed in an annular shape having an inner diameter. Therefore, the double-sided pressure-sensitive adhesive sheet 8 is affixed coaxially with the ferrite member 5 so as to entirely cover the front surface of the ferrite member 5. And the coil 4 is affixed on the front surface of this double-sided adhesive sheet 8 so that it may become coaxial with the ferrite member 5, and the ferrite member 5 and the coil 4 are fixed. As described above, when the shape of the main body portion 8a of the double-sided pressure-sensitive adhesive sheet 8 is formed in an annular shape that is substantially the same as the shape of the front surface of the ferrite member 5, the double-sided pressure-sensitive adhesive sheet 8 is attached to the front surface of the ferrite member 5. Since it is only necessary to affix the main body 8a of the double-sided pressure-sensitive adhesive sheet 8 so as to match the shape of the front surface of the ferrite member 5, this affixing operation can be facilitated. Note that the shape of the main body 8 a of the double-sided pressure-sensitive adhesive sheet 8 is not limited to this, and may be any shape suitable for fixing the coil 4 to the front surface of the ferrite member 5. Therefore, for example, it is possible to make the ring shape substantially the same as the shape of the back surface of the coil 4.
[0026]
The double-sided pressure-sensitive adhesive sheet 8 includes a protective portion 8b formed so as to protrude from the outer peripheral edge of the ferrite member 5 at least at a position where the conductive wire 7 of the coil 4 is drawn. In this way, the protective portion 8b is formed so as to protrude from the outer peripheral edge of the ferrite member 5 at the position where the conductive wire 7 of the coil 4 is drawn out, so that the conductive wire 7 of the coil 4 is particularly at the edge of the outer periphery of the ferrite member 5. It plays the role which protects the conducting wire 7 by entering between the conducting wire 7 and the ferrite member 5 so as not to directly contact the portion 5a. In the present embodiment, the protective part 8 b of the double-sided pressure-sensitive adhesive sheet 8 is constituted by a tongue piece extending from the outer peripheral edge of the main body part 8 a of the double-sided pressure-sensitive adhesive sheet 8 in the lead-out direction of the conductor 7 of the coil 4. More specifically, the protection part 8b is formed in a band having a constant width protruding from the outer peripheral edge of the main body part 8a of the double-sided pressure-sensitive adhesive sheet 8. And the width | variety of the strip | belt-shaped protection part 8b which is the tongue piece is the protection part 8b, even if the conducting wire 7 of the coil 4 pulled out in the outer peripheral direction in the front side of this protection part 8b shifts | deviates to the width direction of the protection part 8b. It is preferable to form it with a sufficient width so as not to deviate from the protection range (the width of the protective portion 8b).
[0027]
Moreover, it is suitable if the protection part 8b of the double-sided pressure-sensitive adhesive sheet 8 is configured to have adhesiveness on both sides. And as length which protrudes in the outer peripheral direction of the protection part 8b of this double-sided adhesive sheet 8, when it is set to the length which the part of the front end side touches the surface of the board | substrate 6 arrange | positioned at the back side of the ferrite member 5 Is preferred. Thereby, the conducting wire 7 drawn out from the coil 4 can be adhesively fixed to the ferrite member 5 and the substrate 6 via the protective portion 8b. That is, as shown in FIGS. 3 and 6, the protective portion 8b is attached to the side surface (outer peripheral surface) from the edge portion 5a of the ferrite member 5 and to the front surface of the substrate 6, and the conductor 7 is attached to the surface of the protective portion 8b. By sticking, the conducting wire 7 can be easily adhesively fixed to the ferrite member 5 and the substrate 6. Thereby, the insulation and protection of the conductive wire 7 of the coil 4 with respect to the ferrite member 5 and the fixing of the conductive wire 7 onto the substrate 6 can be performed simultaneously. Therefore, both the prevention of failure and defective products and the ease of assembly can be achieved at the same time. Note that the length of the protective portion 8b protruding in the outer peripheral direction can be set to a length that protrudes from the outer peripheral edge of the ferrite member 5 but does not contact the substrate 6. In this case, the protection part 8b is affixed to the edge part 5a and the side surface of the ferrite member 5, and the conducting wire 7 drawn from the coil 4 is adhesively fixed only to the ferrite member 5.
[0028]
In the present embodiment, the protective portion 8b and the main body portion 8a are integrally provided in order to simplify the assembling work of the double-sided pressure-sensitive adhesive sheet 8, the coil 4, the ferrite member 5, and the like. However, it is also possible to provide a configuration in which the protective portion 8b is provided separately from the main body portion 8a of the double-sided pressure-sensitive adhesive sheet 8, and is integrated by, for example, adhesively fixing the protective portion 8b and the main body portion 8a.
[0029]
A cord 11 extending from the substrate 6 is connected to the immobilizer unit 10 to form an immobilizer system as shown in FIG. FIG. 7 is a schematic diagram showing a configuration of an immobilizer system according to the present embodiment. The immobilizer unit 10 includes a transmission unit 10a having a transmission circuit, a drive circuit, and the like for transmitting and outputting a request signal that is an electromagnetic signal through the coil 4 functioning as an antenna, and an identification signal from the transponder 1 through the coil 4. Receiving section 10b having a receiving circuit for receiving the signal, and determination section 10c for determining the suitability of the identification information included in the identification signal received by the receiving section 10b. Here, although not shown, the determination unit 10c includes a storage device such as an EEPROM that stores appropriate identification information, and the identification information included in the identification signal received based on the identification information stored in the storage device. And a processing device having logic and software for performing the conformity determination process.
[0030]
When the immobilizer unit 10 detects that the key 2 has been inserted into the key cylinder 3 by a sensor or the like provided in the key cylinder 3, the immobilizer unit 10 operates the transmitter 10a to request an electromagnetic signal via the coil 4. A signal is transmitted to the transponder 1 of the key 2. In the transponder 1, an identification signal including identification information set in advance in response to a request signal from the coil 4 is output to the coil 4. This identification signal is received by the receiving unit 10b via the coil 4 and sent to the determining unit 10c. Then, in the determination unit 10c, a determination process for matching the identification information included in the identification signal is performed. As a result, when it is determined that the identification information included in the identification signal received from the transponder 1 of the key 2 is suitable, it is determined that the proper key 2 is used, and the immobilizer unit 10 controls the engine. A predetermined conformity signal is transmitted to the engine control module 13 that performs the operation. Thereby, the engine control module 13 outputs an operation control signal to the cell motor 14 for starting the engine and the ignition device 15 to operate the engine.
[0031]
As described above, in the present embodiment, as shown in FIG. 4, the double-sided pressure-sensitive adhesive sheet 8 has a tongue-shaped protective portion 8 b on a part of the annular main body portion 8 a that is substantially the same as the front shape of the ferrite member 5. However, the form of the double-sided PSA sheet 8 is not limited to that shown in this embodiment. Then, as another form of the double-sided pressure-sensitive adhesive sheet 8, there is one as shown in FIG. 8 or FIG. 9, for example. The double-sided pressure-sensitive adhesive sheet 8 shown in FIG. 8 protrudes in a substantially fan shape by extending a part of the outer peripheral edge of the annular main body 8a substantially the same as the front shape of the ferrite member 5 to the outside in the radial direction. The protection part 8b is formed. Moreover, the double-sided pressure-sensitive adhesive sheet 8 shown in FIG. 9 has a shape having an outer diameter larger than the outer peripheral edge of the ferrite member 5 over the entire outer periphery of the annular body portion 8 a, and protrudes outward from the outer peripheral edge of the ferrite member 5. A plurality of cuts 8e are formed in the radial direction so that the portion can be bent and attached to the side surface from the edge portion 5a of the ferrite member 5 and the front surface of the substrate 6. In this case, all the portions that protrude outward from the outer peripheral edge of the ferrite member 5 are the protective portions 8b. In addition, the form of the double-sided pressure-sensitive adhesive sheet 8 as described above is merely an example, and is disposed between the coil 4 and the ferrite member 5 to fix them together and protect the conductor 7 drawn from the coil 4. Other shapes are possible as long as the shape includes the portion 8b.
[0032]
Moreover, in this embodiment, although the case where it formed so that the protection part 8b of the double-sided adhesive sheet 8 might protrude from the outer periphery of the ferrite member 5 was demonstrated, the direction in which the protection part 8b protrudes is the outer periphery of the ferrite member 5. It is not limited to the side, and it is also possible to project to the inner peripheral side. That is, when the conducting wire 7 is drawn out to the inner peripheral side of the coil 4 and connected to the land 6b of the substrate 6 provided on the inner side of the inner peripheral edge of the ferrite member 5, the double-sided pressure-sensitive adhesive sheet 8 is adjusted accordingly. The protective portion 8b is formed so as to protrude from the inner peripheral edge of the ferrite member 5 at least at a position where the conductive wire 7 of the coil 4 is drawn. Thereby, it can enter between the conducting wire 7 and the ferrite member 5, and can protect the conducting wire 7 so that the conducting wire 7 of the coil 4 may not contact with the edge part of the inner periphery of the ferrite member 5 directly.
[0033]
【The invention's effect】
As described above, according to the vehicle key device of the present invention, since the coil functioning as an antenna of the immobilizer system and the ferrite member are fixed by the double-sided adhesive sheet, the assembly work of the coil peripheral portion is facilitated. In addition, the insulation and protection of the coil conductors with respect to the ferrite member and the fixing of the conductors on the substrate can be performed simultaneously. Therefore, it is possible to ensure the electrical insulation of the coil conductors while preventing damage to the coil conductors during and after assembly, and to simultaneously realize both the prevention of failure and defective products and the ease of assembly. it can.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view for explaining a configuration of a vehicle key device according to an embodiment.
FIG. 2 is a perspective view showing a completed state of the vehicle key device according to the present embodiment.
FIG. 3 is an exploded perspective view showing a state in which the coil, the ferrite member, and the substrate of the vehicle key device according to the present embodiment are assembled to each other.
FIG. 4 is a plan view showing a double-sided pressure-sensitive adhesive sheet of the vehicle key device according to the present embodiment.
5 is a cross-sectional view taken along the line XX of FIG.
FIG. 6 is a cross-sectional view of the periphery of the protective portion of the double-sided pressure-sensitive adhesive sheet in a state in which the coil, the ferrite member, and the substrate of the vehicle key device according to the present embodiment are assembled together.
FIG. 7 is a schematic diagram showing a configuration of an immobilizer system in the vehicle key device according to the present embodiment.
FIG. 8 is a plan view showing another embodiment of the double-sided pressure-sensitive adhesive sheet of the vehicle key device according to the present invention.
FIG. 9 is a plan view showing still another embodiment of the double-sided pressure-sensitive adhesive sheet of the vehicle key device according to the present invention.
[Explanation of symbols]
1 transponder
2 key
3 Key cylinder
4 Coils
5 Ferrite members
6 Substrate
7 Conductor
8 Double-sided adhesive sheet
8a Body of double-sided PSA sheet
8b Protection part of double-sided PSA sheet
8c Sheet part of double-sided PSA sheet
Adhesive part of 8d double-sided adhesive sheet
10 Immobilizer unit

Claims (4)

A coil that receives a signal from a transponder provided for a key, a ferrite member that is disposed on the back side of the coil, and an end portion of a conductor that is disposed on the back side of the ferrite member and is drawn from the coil are connected. And an insulating double-sided pressure-sensitive adhesive sheet that is disposed between the coil and the ferrite member and fixes them together,
The double-sided pressure-sensitive adhesive sheet is a vehicle key device provided with a protection portion formed so as to protrude from the periphery of the ferrite member at least at a position where the conductive wire of the coil is drawn out. The vehicle key device according to claim 1, wherein the protection part of the double-sided pressure-sensitive adhesive sheet is constituted by a tongue piece extending in a direction in which the lead wire of the coil is pulled out from a peripheral edge of the main body part of the double-sided pressure-sensitive adhesive sheet. The protection part of the said double-sided adhesive sheet has adhesiveness, and the conducting wire pulled out from the said coil is adhesively fixed to one or both of the said ferrite member and the said board | substrate via the said protection part. Vehicle key device. 4. The vehicle key device according to claim 1, wherein the ferrite member is disposed coaxially with the coil and has an outer diameter larger than that of the coil. 5.

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