JP6856488B2 - Switch device - Google Patents

Description

The present invention relates to a switch device.

Conventionally, in a vehicle, an electronic key system that authenticates whether or not a user is a legitimate user by performing biometric authentication that confirms the correctness of the user's biometric information as well as key verification that confirms the correctness of the electronic key has been known. (Patent Document 1). The control device of the electronic key system determines whether or not the user is a legitimate user based on whether or not the biometric information of the user stored in advance matches the biometric information detected by the biometric information sensor. ..

In an electronic key system that also uses biometric authentication, for example, a biometric authentication function is provided on a knob of an engine switch device for starting an engine. For example, when fingerprint authentication is used as biometric authentication, a fingerprint sensor is provided on the surface of the knob of the engine switch device. The knob of the engine switch device is provided so as to be movable back and forth with respect to the housing of the engine switch device. Then, when the knob of the engine switch device is pressed by the user, the control device determines whether or not the user is a legitimate user based on the fingerprint information of the user detected by the fingerprint sensor.

In such an electronic key system that also uses biometric authentication, the vehicle cannot be operated unless both key verification and biometric authentication are established, so that security against vehicle theft can be ensured.

Japanese Unexamined Patent Publication No. 2005-239079

By the way, the fingerprint sensor is connected to the control device of the electronic key system outside the engine switch device by, for example, wiring. In this regard, since the knob of the engine switch device is a part that can be moved by being pressed, it is necessary to prevent the wiring between the fingerprint sensor and the control device from interfering with each other even when the knob moves forward and backward. is there. Specifically, when the knob moves back and forth, the wiring may rub against the knob and the housing, resulting in wear. If the wiring is worn, communication between the fingerprint sensor and the control device may be interrupted. As a result, for example, even though the fingerprint sensor can detect the user's fingerprint, the fingerprint information is not transmitted to the control device, so that the fingerprint authentication may not be established.

Therefore, when the fingerprint sensor is provided in the engine switch device, there has been a demand for a method for further improving the reliability of communication between the fingerprint sensor and the control device.
Not limited to the engine switch device, a biometric information sensor is provided in a movable part of the switch device, and the biometric information detected by the biometric information sensor is transmitted from the biometric information sensor to a control device outside the switch device by wire. If so, the same problem arises.

An object of the present invention is to provide a switch device having higher reliability of communication between a biometric information sensor provided in a movable portion and an external device.

A switch device that can achieve the above object is a switch device that allows the start of an external device by pressing when biometric authentication executed based on the biometric information of the user detected by the biometric sensor is established. The housing, the knob provided so as to be movable back and forth with respect to the housing, the biometric information sensor provided on the surface of the knob opposite to the housing, and the knob. A movable side coil provided and connected to the biometric information sensor, a fixed side coil provided in the housing and connected to an external control device for executing the biometric authentication, and a living body provided in the knob. It includes an information sensor and a communication control unit connected to the movable coil.

Then, when the control device passes a current through the fixed coil, at least electric power can be transmitted to the biometric information sensor via electromagnetic induction with the movable coil. Further, when the communication control unit passes a current through the movable coil, the biometric information data can be transmitted to the control device via electromagnetic induction with the fixed coil.

According to this configuration, even when the biometric information sensor is provided on the knob, which is a movable part that moves forward and backward with respect to the housing, power is supplied by the wireless connection between the fixed side coil and the movable side coil. And since data can be sent and received, there is no need to provide wired wiring between the housing and the knob. As a result, even when the knob moves back and forth with respect to the housing, the wiring does not interfere with the housing and the knob because the fixed coil and the movable coil are wirelessly connected. Therefore, the communication between the fixed coil and the movable coil can be performed more reliably, and the reliability of the communication between the biometric information sensor and the control device can be further improved.

In the above switch device, it is preferable that the fixed side coil and the movable side coil are provided coaxially and in parallel with each other.
According to this configuration, electric power can be supplied from the fixed side coil to the movable side coil by flowing the current through the movable side coil based on the magnetic field generated by the current flowing through the fixed side coil by the control device. Further, data can be transmitted from the movable coil to the fixed coil by flowing a current through the fixed coil based on the magnetic field generated by the current flowing through the movable coil by the communication control unit. .. As a result, electric power can be supplied to the biometric information sensor provided on the knob, which is a movable part of the switch device, and the detection result of the biometric information sensor can be transmitted to the control device.

In the above switch device, it is preferable that the fixed side coil is embedded in a bezel provided so as to surround the knob.
According to this configuration, the control device can supply electric power to the biometric information sensor via electromagnetic induction with the movable coil by passing an electric current through the fixed coil embedded in the bezel. Further, when the communication control unit passes a current through the movable coil based on the biological information detected by the biological information sensor, data can be transmitted to the biological information sensor via electromagnetic induction with the fixed coil.

In the above switch device, the portable device possessed by the user has a transponder, and when the transponder receives the start-up radio wave from the vehicle, the ID signal is used by using the power induced based on the start-up radio wave. The fixed-side coil wirelessly transmits the activation radio wave to the transponder and wirelessly communicates with the transponder in order to execute authentication by short-range wireless communication with the transponder. More preferably, it is a coil that receives the ID signal.

According to this configuration, if the switch device has a function of authenticating by short-range wireless communication with the electronic key, it is not necessary to provide a movable coil as a new component.
The above switch device is suitable for a switch device in which the external device is an engine.

According to the switch device of the present invention, the reliability of communication between the biometric information sensor provided in the movable portion and the external device can be further improved.

The block diagram of the electronic key system of one Embodiment. The perspective view of the engine switch of one Embodiment. The schematic diagram which shows the mode of communication between a movable part side and a fixed side. Perspective view of the engine switch of another embodiment. The schematic diagram of the engine switch of another embodiment.

Hereinafter, an embodiment of the switch device will be described.
As shown in FIG. 1, the vehicle 1 includes an electronic key system 2 that authenticates a user by using both key verification and biometric authentication. In biometric authentication, it is confirmed whether or not a user is a legitimate user based on information (biometric information) unique to each individual such as a user's fingerprint, voice print, facial vein, vein, iris of eye hole, and retina. Here, as the biometric authentication, fingerprint authentication for authenticating the user's fingerprint is used.

The electronic key system 2 executes ID verification with the electronic key 3 which is a key for the vehicle through narrow area communication, triggered by wide area communication from the vehicle 1. The key verification is a verification for confirming the correctness of the electronic key 3 through ID verification wirelessly with the electronic key 3. For key verification, for example, verification by a key operation free system that performs ID verification by narrow-range communication with the electronic key 3 triggered by wide area communication from the vehicle 1 and short-range communication between the vehicle 1 and the electronic key 3 are used. There is a collation by an immobilizer system that performs ID collation. Here, the ID verification of the key operation free system is referred to as "smart verification", and the ID verification of the immobilizer system is referred to as "immobilizer verification". The immobilizer system is a key system that can be used as an alternative when smart collation cannot be performed due to the exhaustion of the battery of the electronic key 3.

The vehicle 1 includes a collation ECU (Electronic Control Unit) 4 for ID collation, a body ECU 5 for managing the power supply of in-vehicle electrical components, and an engine ECU 6 for controlling the engine 7. These ECUs are connected to each other by a communication line 8 in the vehicle. As the standard of the communication line 8, for example, CAN (Controller Area Network) is used. The electronic key ID of the electronic key 3 registered in the vehicle 1 is written and saved in the memory 9 of the collation ECU 4. The body ECU 5 switches the locking / unlocking of the door by controlling the operation of the door lock device 10 provided on the door of the vehicle.

Further, the vehicle 1 includes an outdoor transmitter 11 that transmits radio waves to the outside, an indoor transmitter 12 that transmits radio waves indoors, and a radio wave receiver 13 that receives radio waves in the vehicle 1. The outdoor transmitter 11 and the indoor transmitter 12 transmit, for example, radio waves in the LF (Low Frequency) band. The radio wave receiver 13 receives, for example, radio waves in the UHF (Ultra High Frequency) band.

Inside the vehicle 1, an engine switch 14 that is operated when switching the vehicle power on / off is provided. The engine switch 14 is a push-operated switch that is operated by pressing the knob 30, and is a push momentary switch that returns to the original initial position when the knob 30 is pressed and then released. When the engine switch 14 is pressed, the vehicle power supply shifts to one of the IG off, ACC on, and engine start states.

The electronic key 3 includes a key control unit 20 that controls the operation of the electronic key 3, a receiving unit 21 that receives radio waves in the electronic key 3, and a transmitting unit 22 that transmits radio waves in the electronic key 3. The electronic key ID unique to the electronic key 3 is written and saved in the memory 23 of the key control unit 20. The receiving unit 21 receives the LF radio waves transmitted from the outdoor transmitter 11 and the indoor transmitter 12. Further, the transmission unit 22 transmits, for example, a UHF radio wave. The radio wave receiver 13 of the vehicle 1 receives the UHF radio wave transmitted from the transmission unit 22.

The electric power of the battery built in the electronic key 3 is used for wireless ID verification between the electronic key 3 and the vehicle 1. The electronic key 3 has a built-in transponder 24 in case the battery of the electronic key 3 runs out. The transponder 24 includes a transponder control unit 25 and a transponder transmission / reception unit 26. The transponder ID is stored in the memory of the transponder control unit 25. Upon receiving the activation radio wave from the vehicle 1, the transponder 24 transmits a transponder ID, which is a unique identification code, and executes the above-mentioned immobilizer collation.

Further, the engine switch 14 of the vehicle 1 has a built-in communication coil 27 (communication antenna) for transmitting and receiving short-range radio waves to and from the transponder 24 of the electronic key 3. For the immobilizer communication performed between the transponder 24 and the communication coil 27, for example, a short-range radio conforming to an RFID (Radio Frequency IDentification) standard is used. The communication area of this immobilizer communication is set to, for example, a range of several cm. The communication coil 27 wirelessly transmits a start-up radio wave to the transponder 24. The transponder 24 wirelessly transmits the transponder ID to the communication coil 27 by using the electric power induced based on the activation radio wave from the communication coil 27. The communication coil 27 receives the transponder ID transmitted from the transponder 24.

The collation ECU 4 acquires an electronic key ID from the electronic key 3 by wireless communication in smart communication. The collation ECU 4 executes smart collation to confirm the correctness of the acquired electronic key ID. That is, the collation ECU 4 determines whether or not the electronic key ID acquired from the electronic key 3 matches the electronic key ID stored in the memory 9. The smart collation includes an outdoor smart collation that executes ID collation with the outdoor electronic key 3 triggered by communication from the outdoor transmitter 11, and an indoor electronic key 3 and ID triggered by communication from the indoor transmitter 12. There is an indoor smart collation that performs collation. Further, the collation ECU 4 acquires the transponder ID from the electronic key 3 by wireless communication in the immobilizer communication. Then, the collation ECU 4 executes immobilizer collation to confirm the correctness of the acquired transponder ID. That is, the collation ECU 4 determines whether or not the acquired transponder ID matches the transponder ID stored in the memory 9.

The engine switch 14 includes a knob 30 and a switch housing 40 which is a main body portion (housing portion) of the engine switch 14. The switch housing 40 has, for example, a substantially cylindrical shape. The knob 30 is provided so as to be movable back and forth with respect to the switch housing 40 as the housing. An annular bezel 41 is provided on the front surface of the switch housing 40 (on the operation surface side of the knob 30) so as to surround the knob 30. The communication coil 27 (fixed side coil) described above is embedded inside the bezel 41. The communication coil 27 is formed by winding, for example, a plurality of antenna wires. One end of the communication coil 27 is connected to the collation ECU 4. The collation ECU 4 generates a magnetic field around the communication coil 27 by supplying power to the communication coil 27.

The engine switch 14 includes an urging portion 42 that urges the knob 30 in the projecting direction with respect to the switch housing 40. Even when the knob 30 is pressed, the knob 30 is pushed into the switch housing 40 against the urging force of the urging unit 42, and when the pressing operation is released, the urging force of the urging unit 42 is released. Returns to the initial position.

Further, the vehicle 1 includes a sensor unit 31 that detects the user's biological information Dbi. The sensor unit 31 is arranged on the operation process until the user gets in the vehicle and starts the engine 7. Specifically, the sensor unit 31 is provided on the knob 30 of the engine switch 14. As a biological information sensor, for example, a fingerprint sensor 31a is adopted in the sensor unit 31. The fingerprint sensor 31a detects the user's fingerprint as biometric information Dbi based on the change in the electric charge inside the fingerprint sensor 31a when, for example, the user's finger touches the surface (operation surface) of the fingerprint sensor 31a.

As shown in FIG. 2, a communication coil 43 (movable side coil) and a communication control unit 44 are embedded in the knob 30 of the engine switch 14. The communication coil 43 is provided coaxially and parallel to, for example, the communication coil 27. A communication control unit 44 is connected to the communication coil 43, and a fingerprint sensor 31a is connected to the communication control unit 44.

As shown in FIG. 3, the operation control unit 32 of the collation ECU 4 supplies electric power to the fingerprint sensor 31a by passing a current through the communication coil 27 to magnetically couple the communication coil 27 and the communication coil 43 by electromagnetic induction. To do. In the communication coil 43, a current based on the magnetic field generated by the communication coil 27 is generated by electromagnetic induction. Further, the communication control unit 44 is supplied with a current generated in the communication coil 43, and the communication control unit 44 is driven based on this electric power. The communication control unit 44 operates the fingerprint sensor 31a by supplying electric power to the fingerprint sensor 31a. The communication control unit 44 acquires the detection result of the user's fingerprint detected by the fingerprint sensor 31a. The communication control unit 44 causes the communication coil 27 and the communication coil 43 to be magnetically coupled by electromagnetic induction by passing a current through the communication coil 43 based on the detection result of the fingerprint sensor 31a, and causes the collation ECU 4 to display the detection result of the user's fingerprint. Send.

Further, as shown in FIG. 1, the biometric information Dbi of a regular user is registered in advance in the memory 9 of the collation ECU 4. The collation ECU 4 executes biometric authentication by comparing the biometric information Dbi detected by the sensor unit 31 with the biometric information Dbi stored in the memory 9.

Further, the collation ECU 4 of the vehicle 1 includes an operation permission unit 33. After confirming that both smart verification and biometric authentication are established, the operation permission unit 33 of the verification ECU 4 permits switching of the vehicle power supply (power transition operation) by operating the engine switch 14. When the power transition operation is permitted by the operation permission unit 33, the engine 7 is started (the vehicle power is switched) when the user presses the engine switch 14. Further, when the power transition operation is not permitted by the operation permission unit 33, the engine 7 does not start even if the user presses the engine switch 14. When the power transition operation of the vehicle 1 is permitted, the engine 7 is started when the engine switch 14 is operated while the brake is depressed by the user.

Next, the operation of the electronic key system 2 will be described.
The outdoor transmitter 11 forms an outdoor communication area around the vehicle 1 by LF radio waves. When the electronic key 3 enters the outdoor communication area and communication (outside smart communication) is established between the vehicle 1 and the electronic key 3, smart collation (outside smart collation) is started. The smart verification includes a vehicle code verification that authenticates a unique vehicle code of the vehicle 1, a challenge response authentication that uses an encryption key, and an electronic key ID verification that authenticates an electronic key ID. The collation ECU 4 executes outdoor smart collation by confirming whether or not all of these collations and authentications are established with the electronic key 3 in the outdoor communication area. When the collation ECU 4 confirms that the outdoor smart collation is established, the collation ECU 4 permits or executes the locking / unlocking of the door of the vehicle 1 by the body ECU 5.

Further, when the collation ECU 4 confirms the user's boarding by, for example, a door courtesy switch, the collation ECU 4 transmits a wake signal from the indoor transmitter 12 instead of the outdoor transmitter 11. The indoor transmitter 12 forms an indoor communication area for wake signals in the entire vehicle interior by using LF radio waves. When the electronic key 3 enters the indoor communication area and communication (in-vehicle smart communication) is established between the vehicle 1 and the electronic key 3, smart collation (indoor smart collation) is started. The collation ECU 4 executes the indoor smart collation by confirming the correctness of the vehicle code collation, the challenge response authentication, and the electronic key ID collation with the electronic key 3 in the room.

When the collation ECU 4 confirms that all of the indoor code verification, the challenge response authentication, and the electronic key ID verification are established, it recognizes that the indoor smart verification is established. On the other hand, when the collation ECU 4 confirms that even one of the vehicle code verification, the challenge response authentication, and the electronic key ID verification is not established, it recognizes that the indoor smart verification is not established.

Next, when the user in the vehicle 1 starts the engine 7, the user presses the knob 30 of the engine switch 14. The operation control unit 32 of the collation ECU 4 supplies electric power to the communication control unit 44 via the communication coil 43 by electromagnetic induction by passing a current through the communication coil 27, for example, when the indoor smart collation is established. The sensor unit 31 (fingerprint sensor 31a) is driven. Then, when the knob 30 of the engine switch 14 is pressed, the communication control unit 44 causes a current to flow through the communication coil 43 based on the detection result (fingerprint) from the fingerprint sensor 31a provided on the knob 30. , Data is output to the communication coil 27 by electromagnetic induction. Therefore, the collation ECU 4 can wirelessly acquire the biometric information Dbi from the fingerprint sensor 31a when the knob 30 of the engine switch 14 is pressed.

Then, the collation ECU 4 executes biometric authentication for confirming the correctness of the acquired biometric information Dbi. At this time, the collation ECU 4 confirms the correctness of the biometric information Dbi acquired by the fingerprint sensor 31a by comparing the biometric information Dbi detected by the fingerprint sensor 31a with the biometric information Dbi stored in the memory 9. To do. If the matching ECU 4 matches these biometric information Dbi, it is determined that the biometric authentication has been established, and if they do not match, it is determined that the biometric authentication has not been established.

When the verification ECU 4 confirms that both the indoor smart verification and the biometric authentication are established, the verification ECU 4 permits the power transition operation of the vehicle 1 by operating the engine switch 14. On the other hand, when the verification ECU 4 confirms that either the indoor smart verification or the biometric authentication is unsuccessful, the verification ECU 4 does not allow the power transition operation of the vehicle 1 by the operation of the engine switch 14.

According to the configuration of the present embodiment, the actions and effects described below can be obtained.
(1) The electronic key system 2 is provided with a function of performing biometric authentication in addition to outdoor smart verification and indoor smart verification. Conventionally, in order to operate the fingerprint sensor 31a provided for performing biometric authentication, the fingerprint sensor 31a is supplied with power and data is transmitted / received by connecting the verification ECU 4 and the fingerprint sensor 31a by wire. .. In this regard, since the fingerprint sensor 31a is provided on the knob 30 which is a movable part of the engine switch 14, it is necessary to wire the knob 30 and the switch housing 40 by wire. This wiring needs to be less likely to interfere with the knob 30 and the switch housing 40 in order to suppress wear even when the knob 30 moves back and forth with respect to the switch housing 40. In order to suppress the wear of the wiring, it is conceivable to increase the gap between the knob 30 and the switch housing 40, but in this case, the physique of the engine switch 14 becomes large. Then, when the wiring is worn, the fingerprint sensor 31a and the collation ECU 4 cannot be connected by wire, so that the communication may be interrupted, and the reliability of the communication between the fingerprint sensor 31a and the collation ECU 4 is lowered.

In this respect, in the present embodiment, the fingerprint sensor 31a and the collation ECU 4 are wirelessly connected. Specifically, by wireless communication between the communication coil 27 provided on the fixed portion side (switch housing 40 side) of the engine switch 14 and the communication coil 43 provided on the movable portion side (knob 30 side) of the engine switch 14. , Can supply power and send and receive data. In this case, since the knob 30 and the switch housing 40 are not connected by wiring, the wiring interferes with the knob 30 and the switch housing 40 even when the knob 30 moves forward and backward with respect to the switch housing 40. There is nothing to do. Therefore, even when the fingerprint sensor 31a is provided on the knob 30, the reliability of communication between the fingerprint sensor 31a and the collation ECU 4 can be further improved because the wiring is not worn.

(2) Of the two coils (communication coils 27 and 43) used for wireless communication between the fingerprint sensor 31a and the collation ECU 4, the communication coil 27 is the transponder 24 of the electronic key 3 used for immobilizer authentication. It is a pair of coils. That is, if the electronic key system 2 is provided with a function for performing immobilizer authentication, the communication coil 27 is a coil provided in advance. Therefore, the communication coil 27 can be used not only for immobilizer authentication but also for both power supply and data transmission / reception during biometric authentication. As a result, it is not necessary to provide a new component as the communication coil 27.

The present embodiment may be modified as follows. The following other embodiments can be combined with each other to the extent that they are technically consistent.
The function of the transponder transmission / reception unit 26 of the electronic key 3 may be incorporated into, for example, the reception unit 21 and the transmission unit 22. Further, the receiving unit 21 may be used as a transmitting / receiving unit, and may be provided with the function of the transponder transmitting / receiving unit 26.

-The door may be locked / unlocked by, for example, a wireless key system in which ID verification (wireless verification) is executed triggered by communication from the electronic key 3. The wireless key system switches the lock / unlock of the door by remote control using the operation switch provided on the electronic key 3.

-The key verification is not limited to smart verification, and other verification may be adopted.
-The biometric authentication may be any kind as long as it is an authentication using the user's biometric information Dbi. For example, as the biological information Dbi, a fingerprint may be used as in the present embodiment, or a user's voice, veins, iris of the eye hole, or the like may be used. For example, when a vein is used as biometric information Dbi, a vein sensor is provided in the sensor unit 31, and when performing biometric authentication, the user touches the vein sensor with a finger to detect the vein. Then, biometric authentication is executed based on whether or not the vein matches the vein of a legitimate user stored in advance.

-The sensor unit 31 is not limited to the engine switch 14, but is provided at any position in the room where the user's biological information can be detected in the operation process until the user presses the engine switch 14. May be done.

-The smart collation system is not limited to the method of forming separate areas inside and outside the vehicle to establish communication. For example, the system may specify the key position by measuring the distance to the electronic key 3 using an array antenna. Further, even if LF antennas are arranged on the left and right sides of the vehicle body and the response of the electronic key 3 to the radio waves of these antennas is confirmed, it is determined whether the electronic key 3 is located inside or outside the vehicle. Good.

-In the present embodiment, when wirelessly connecting the fingerprint sensor 31a and the collation ECU 4, the communication coil 27 used for immobilizer authentication is used, but the present invention is not limited to this.
As shown in FIG. 4, power may be supplied and data may be transmitted / received by wireless connection between the coil 45 provided on the outer peripheral surface of the switch housing 40 and the communication coil 43. In this case, for example, the coil 45 is provided coaxially and parallel to the communication coil 43. The collation ECU 4 supplies electric power to the fingerprint sensor 31a via the communication coil 43 by passing an electric current through the coil 45. Further, the communication control unit 44 transmits / receives data via the coil 45 by passing a current through the communication coil 43 based on the detection result of the fingerprint sensor 31a.

Further, as shown in FIG. 5, instead of the communication coil 43, a coil 43a having a central axis may be provided in a direction orthogonal to the direction in which the knob 30 moves back and forth. In this case, the switch housing 40 is provided with the coil 46 coaxially and parallel to, for example, the coil 43a. Power may be supplied and data may be transmitted / received by a wireless connection between the coil 43a and the coil 46. Further, the communication control unit 44 transmits / receives data via the coil 46 by passing a current through the coil 43a based on the detection result of the fingerprint sensor 31a.

-In the present embodiment, the communication coil 27 and the communication coil 43 are provided coaxially and in parallel with each other, but the present invention is not limited to this. For example, the central axis of the communication coil 27 and the central axis of the communication coil 43 may be deviated from each other. This is because the more the central axis of the communication coil 27 and the central axis of the communication coil 43 deviate from each other, the more difficult it becomes to wirelessly connect to the coil on the other side due to electromagnetic induction. Further, when the communication coil 27 and the communication coil 43 are parallel to each other, the magnetic field generated from the coil can be more accurately transmitted to the coil on the other side, but wireless connection is possible even if the communication coil 27 and the communication coil 43 are deviated from the parallel to some extent. Because of that.

In the present embodiment, the operation control unit 32 of the collation ECU 4 supplies electric power to the fingerprint sensor 31a via electromagnetic induction with the communication coil 43 by passing an electric current through the communication coil 27, but only by supplying electric power. You may also send the data instead.

-In the present embodiment, the engine switch 14 is embodied as a switch device provided with the fingerprint sensor 31a, but the present invention is not limited to this. That is, if a biometric information sensor such as a fingerprint sensor 31a is provided on a movable portion of the switch device such as the knob 30 of the engine switch 14, the same problem will occur. When the biometric information sensor is provided in the movable part of the switch device, wiring is provided from the housing part (fixed part) of the switch device to the biometric information sensor, and the wired wiring between the movable part and the housing part is provided. This is because wear and the like become a problem. Therefore, the present invention is not limited to the engine switch 14, and any switch device that provides a biometric information sensor on a moving portion may be used.

1 ... Vehicle, 2 ... Electronic key system, 3 ... Electronic key, 4 ... Matching ECU, 5 ... Body ECU, 6 ... Engine ECU, 7 ... Engine, 8 ... Communication line, 9 ... Memory, 10 ... Door lock device, 11 ... outdoor transmitter, 12 ... indoor transmitter, 13 ... radio wave receiver, 14 ... engine switch, 20 ... key control unit, 21 ... receiver unit, 22 ... transmitter unit, 23 ... memory, 24 ... transponder, 25 ... transponder control Unit, 26 ... Transmitter transmission / reception, 27 ... Communication coil (fixed side coil), 30 ... Knob, 31 ... Sensor unit, 31a ... Fingerprint sensor (biological information sensor), 32 ... Operation control unit, 33 ... Operation permission unit, 40 ... Switch housing (housing), 41 ... bezel, 42 ... urging part, 43 ... communication coil (movable side coil), 43a ... coil, 44 ... communication control unit, 45, 46 ... coil, Dbi ... biometric information.

Claims (5)

In a switch device that allows the start of an external device by pressing when biometric authentication executed based on the user's biometric information detected by the biometric authentication sensor is established.
With the housing
A knob provided so that it can move forward and backward with respect to the housing,
A biometric information sensor provided on the surface of the knob opposite to the housing and detecting the biometric information,
A movable coil provided on the knob and connected to the biometric information sensor,
A fixed-side coil provided in the housing and connected to an external control device that executes the biometric authentication.
A communication control unit provided on the knob and connected to the biometric information sensor and the movable coil is provided.
By passing a current through the fixed coil, the control device transmits at least electric power to the biometric sensor via electromagnetic induction with the movable coil.
A switch device in which the communication control unit transmits an electric current to the control device via electromagnetic induction with the fixed coil by passing an electric current through the movable coil. In the switch device according to claim 1,
A switch device in which the fixed side coil and the movable side coil are provided coaxially and in parallel with each other. In the switch device according to claim 1 or 2.
The fixed-side coil is a switch device embedded in a bezel provided so as to surround the knob. In the switch device according to any one of claims 1 to 3.
The portable device owned by the user has a transponder and
When the transponder receives the activation radio wave from the vehicle, the transponder wirelessly transmits an ID signal by using the electric power induced based on the activation radio wave.
The fixed-side coil wirelessly transmits the activation radio wave to the transponder and wirelessly communicates with the transponder to transmit the ID signal in order to execute authentication by short-range radio communication with the transponder. A switch device that is a receiving coil. In the switch device according to any one of claims 1 to 4.
The external device is a switch device that is an engine.

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