JP2015140639A - electronic key system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic key system that enables verification of authorized user by a portable key, without using electricity from an on-vehicle battery.SOLUTION: An electronic key system 1 includes a portable key 100 that outputs verification information for verifying a user and a verification device 230 mounted on a vehicle 200 that performs verification processing based on the verification information, while the portable key 100 is provided with a power supply part 120 that supplies electricity to the verification device 230 and the verification device 230 includes a power receiving part 250 that receives the electricity supplied by the power supply part 120 and a verification part 240 capable of performing verification processing based on the verification information by using the electricity received by the power receiving part 250.

Description

  The present invention relates to an electronic key system.

There is an electronic key system that locks or unlocks a door of a vehicle using a portable electronic key (mobile key) using wireless communication. In such an electronic key system, for example, when an authentication code is transmitted from the portable key to the vehicle while the door of the vehicle is locked, the in-vehicle device mounted on the vehicle uses the authentication code transmitted from the portable key. If the user is authenticated and the user is authorized, the door is unlocked.
Here, since electric power is required to perform the above-described authentication code authentication and door unlocking, techniques for reducing power consumption are being studied. For example, a technology for suppressing power consumption from the battery by controlling on / off of power supply to the in-vehicle device from a battery mounted on the vehicle is disclosed (for example, see Patent Document 1).

JP 2012-237133 A

However, in the electronic key system disclosed in Patent Literature 1, even if the power consumption from the battery can be suppressed, if the power cannot be supplied from the battery, the mobile key cannot be used for authentication. Unable to unlock the door. Therefore, it is conceivable to prepare a method of unlocking the door with a conventional mechanical key in addition to the electronic key system. Since it is necessary to provide a corresponding locking mechanism and keyhole in the door, an increase in cost and weight, a restriction on the degree of freedom in design, and a complicated operation for the user are caused.
The present invention has been made in view of such circumstances, and provides an electronic key system that enables authentication of a legitimate user using a portable key without requiring power from a battery mounted on a vehicle. One of the purposes.

  According to the first aspect of the present invention, a portable key that outputs authentication information for authenticating a user (for example, the portable key 100, 100A, 100B of the embodiment) and a vehicle (for example, the vehicle 200, 200A, 200B of the embodiment) are provided. An electronic key system (for example, the electronic key system 1, 1A, 1B of the embodiment) including an authentication device (for example, the authentication device 230, 230A, 230B of the embodiment) that is mounted and performs an authentication process based on the authentication information. And the said portable key is equipped with the electric power feeding part (For example, electric power feeding part 120, 120A, 120B of embodiment) which can supply electric power with respect to the said authentication apparatus, The said authentication apparatus is the electric power supplied from the said electric power feeding part. Based on the authentication information using the power receiving unit (for example, the power receiving units 250, 250A, 250B of the embodiment) and the power received by the power receiving unit. Comprising executable authentication unit testimony processing (authentication unit 240 of the example embodiment), and an electronic key system.

  According to a second aspect of the present invention, in the electronic key system according to the first aspect, the authentication unit performs the authentication process using electric power supplied from a vehicle-side battery mounted on the vehicle, and the vehicle When power is not supplied from the side battery, the authentication process is performed using the power received by the power receiving unit.

  According to a third aspect of the present invention, in the electronic key system according to the first or second aspect, the vehicle and the portable key include a power feeding path for supplying power from the power feeding unit to the power receiving unit, and the authentication device. Receives the authentication information from the portable key through the power feeding path when the power receiving unit receives power from the power feeding unit.

  According to a fourth aspect of the present invention, in the electronic key system according to any one of the first to third aspects, the portable key includes a transmission unit that transmits the authentication information to the authentication device by wireless communication. The power supply unit is mounted on the portable key, and supplies the power of a portable key side battery (for example, the portable key side battery unit 180 of the embodiment) that supplies power to the transmission unit to the authentication device.

  According to a fifth aspect of the invention, in the electronic key system according to any one of the first to fourth aspects (for example, the electronic key system 1A of the embodiment), the power supply unit (for example, the power supply unit 120A of the embodiment) and the Each of the power receiving units (for example, the power receiving unit 250A of the embodiment) includes a coil (for example, the coils 122 and 252 of the embodiment) and a magnetic body (for example, the magnets 123 and 253 of the embodiment), and the power feeding unit and the power receiving unit When each of the coils included in the power supply unit and the power reception unit approach each other, the coil temporarily generates inductive power by the magnetic force generated by each magnetic body included in the power supply unit and the power reception unit, The power supply unit is configured to supply power to a portable key side battery mounted on the portable key when a coil included in the power supply unit generates dielectric power due to the approach of the magnetic body. Using, current flows in the coil, wherein the feeding unit comprises said power receiving unit, in response to the current in the coil of the power feeding portion is provided flows, to receiving the induced current flowing through the coil comprising the power receiving unit.

  According to a sixth aspect of the present invention, in the electronic key system according to the fifth aspect, each magnetic body provided in the power feeding unit and the power receiving unit is a rod-shaped magnet having two poles, and the power feeding unit is When the power receiving unit is held in a predetermined posture, the magnets are provided so that the directions of the magnets are perpendicular to each other.

  According to a seventh aspect of the present invention, in the electronic key system according to any one of the first to third aspects (for example, the electronic key system 1B of the embodiment), the power feeding unit (for example, the power feeding unit 120B of the embodiment) The power reception unit (for example, the power reception unit 250B in the embodiment) includes at least a part of a power generation mechanism that generates power, and supplies the power generated by the power generation mechanism to the authentication unit.

  According to an eighth aspect of the present invention, in the electronic key system according to the seventh aspect, the power generation mechanism includes a magnetic body (for example, the magnetic stripe 320 of the embodiment) included in the power feeding unit, and the power receiving unit. A coil (for example, the coil array 310 of the embodiment) that generates dielectric power by the magnetic force generated by the magnetic body.

  According to a ninth aspect of the present invention, in the electronic key system according to the eighth aspect, in the portable key, a plurality of the magnetic bodies are arranged in a line (for example, the magnetic stripe 320 of the embodiment), and a plurality of the magnetic bodies are provided. An output unit (for example, the magnetic stripe 330 according to the embodiment) that outputs the authentication information is disposed outside one end of the arranged columns, and the authentication key includes the portable key The authentication unit receives dielectric power generated in the coil by a magnetic force generated by the magnetic body when slid in a predetermined direction along the row with respect to the power reception unit, and then outputs the authentication from the output unit. Get information

  The invention according to claim 10 is the electronic key system according to any one of claims 1 to 9 (for example, the electronic key system 1, 1B of the embodiment), and the vehicle (for example, the vehicle 200, 200B of the embodiment). Includes an external mirror (for example, the door mirror 201 of the embodiment) provided outside the vehicle, and a concave portion (for example, the concave portion 202 of the embodiment) recessed upward is formed on the lower surface of the external mirror. The power receiving unit (for example, the power receiving units 250 and 250B of the embodiment) is provided in the recess.

  An eleventh aspect of the present invention is the electronic key system according to any one of the first to tenth aspects, wherein the vehicle includes a door and a locking mechanism that locks and unlocks the door (for example, the locking of the embodiment). Locking control for controlling the locking mechanism to unlock the locked door based on a result of the authentication unit performing an authentication process based on the authentication information acquired from the mechanism 221) and the portable key (For example, the locking control unit 222 of the embodiment), and the locking control unit unlocks the door based on electric power supplied from a vehicle-side battery mounted on the vehicle. When the electric power is not supplied from the vehicle-side battery, the locking mechanism is controlled so as to unlock the door based on the electric power received by the power receiving unit.

  According to the first aspect of the present invention, the electronic key system uses the power supplied from the portable key to authenticate the authentication code transmitted from the portable key, and therefore requires the power from the battery mounted on the vehicle. In addition, it is possible to authenticate a regular user using a portable key.

  According to the second aspect of the present invention, the electronic key system authenticates the authentication code transmitted from the portable key based on the power supplied from the portable key when the electric power is not supplied from the battery mounted on the vehicle. Therefore, even when power cannot be supplied from the battery mounted on the vehicle, it is possible to authenticate the authorized user using the portable key.

  According to the invention described in claim 3, since the electronic key system transmits the authentication code via the power feeding path from the portable key to the vehicle, the authentication code is transmitted from the portable key to the authentication device without using wireless communication. Can be sent. Therefore, even when the communication device cannot operate because power cannot be supplied from the battery mounted on the vehicle, the authentication device can acquire the authentication code from the portable key.

  According to the invention described in claim 4, since the electronic key system uses the power of the portable key side battery of the portable key as power for feeding, it can supply power to the authentication device with a simple configuration. .

  According to the fifth aspect of the present invention, the electronic key system has a simple structure because it does not require a physical contact for supplying power from the portable key side battery of the portable key to the authentication device. As well as the impact on the design. In addition, since the electronic key system does not require an external contact, it is possible to suppress adverse effects due to water, dust, and the like.

  According to the invention of claim 6, in the electronic key system, when the power supply unit of the portable key is held over the power receiving unit of the vehicle door, suction or repulsion occurs between the portable key and the vehicle door by magnetic force. Can not be.

  According to the seventh aspect of the invention, since the electronic key system supplies power to the vehicle by the power generation mechanism that generates power, both the vehicle-side battery and the portable key-side battery are in a state where power cannot be supplied. However, it is possible to supply power to the authentication device, and it is possible to authenticate an authorized user using the portable key.

  According to the invention described in claim 8, since the electronic key system can use electric power generated by the interaction between the magnetic body and the coil, it can generate electric power to be supplied to the authentication device with a simple configuration. Can do.

  According to the ninth aspect of the present invention, the electronic key system causes the coil to continuously generate electromotive force in the coil by sliding the portable key in the sliding direction. Sufficient power can be secured. In addition, since the authentication device reads the authentication code after the electromotive force is generated in the coil, the authentication code can be reliably acquired.

  According to the invention of claim 10, the electronic key system receives power supplied from the portable key in a place where water, dust, or the like recessed upward from the lower surface of the external mirror is difficult to enter. Since the part is provided, it is possible to suppress adverse effects due to water, dust and the like.

  According to the eleventh aspect of the invention, the electronic key system supplies the power received by the power receiving unit to the locking control unit even when power cannot be supplied from the battery mounted on the vehicle. Can be locked.

It is a block diagram which shows the example of schematic structure of the electronic key system by 1st Embodiment. It is explanatory drawing explaining an example of a structure with the contact of the electric power feeding side, and the contact of the receiving side. It is a flowchart which shows an example of the unlocking process by 1st Embodiment. It is a block diagram which shows the example of schematic structure of the electronic key system by 2nd Embodiment. It is explanatory drawing explaining the specific example of the non-contact electric power feeding system. It is explanatory drawing explaining the electric power feeding by an electromagnetic induction system. It is explanatory drawing explaining the electric power feeding by a magnetic resonance system. It is a flowchart which shows an example of the unlocking process by 2nd Embodiment. It is a block diagram which shows the example of schematic structure of the electronic key system by 3rd Embodiment. It is explanatory drawing explaining the specific example of the electric power feeding system by a slide type electric power generation. It is sectional drawing which cut | disconnected the recessed part by the AA line. It is a flowchart which shows an example of the unlocking process by 3rd Embodiment. It is a figure explaining the modification 1 of the structure of a slide type electric power generation. It is a figure explaining the modification 2 of the structure of a slide type electric power generation.

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
<First Embodiment>
FIG. 1 is a configuration diagram illustrating an example of a schematic configuration of an electronic key system 1 according to the present embodiment. The electronic key system 1 includes a portable key 100 and a vehicle 200.

  The portable key 100 is a portable card-type electronic key that locks (locks) or unlocks (unlocks) the door of the vehicle 200 by outputting an authentication code (an example of authentication information) for authenticating a user. is there. The mobile key 100 shown in FIG. 1 includes an authentication code transmission unit 110 (transmission unit), an antenna 111, a power feeding unit 120, and a mobile key side battery unit 180.

  The portable key side battery unit 180 includes, for example, a battery (portable key side battery) such as a coin-type lithium battery or a secondary battery. This battery may be provided in the portable key side battery unit 180 so as to be replaceable by the user, or may be provided so as not to be replaceable. For example, the portable key side battery unit 180 supplies the power stored in the battery to the authentication code transmission unit 110 and the power supply unit 120 with a predetermined voltage (the authentication code transmission unit 110 and the power supply unit 120. The voltage is supplied to the power supply.

  The authentication code transmitting unit 110 transmits an authentication code for locking or unlocking the door of the vehicle 200 via the antenna 111 by wireless communication. The antenna 111 is an antenna for performing wireless communication. Further, the above-described authentication code is set in a pair between the portable key 100 and the vehicle 200 so that the door of the vehicle 200 can be locked or unlocked only from the portable key 100 of the authorized user who owns the vehicle 200. ing. Note that the authentication code transmission unit 110 may transmit the authentication code via the power supply unit 120.

  The power feeding unit 120 supplies power to the vehicle 200. For example, the power feeding unit 120 includes a power feeding side contact that can physically contact a power receiving side contact of the vehicle 200, and the power supplied from the portable key side battery unit 180 via the contact is provided. Supply to vehicle 200 (contact power supply). The configuration of this contact will be described later with reference to FIG.

Next, the configuration of the vehicle 200 will be described.
A vehicle 200 shown in FIG. 1 includes a communication device 210 (reception unit), a door locking device 220, an authentication device 230, and a vehicle-side battery unit 280. The vehicle side battery unit 280 is attached with a battery (vehicle side battery) used for starting the engine of the vehicle 200, and operates the communication device 210, the door locking device 220, and the authentication device 230. It is also used as a power supply source.

  The communication device 210 performs wireless communication with the portable key 100 via the antenna 211. The antenna 211 is an antenna for performing wireless communication. For example, the communication device 210 receives an authentication code transmitted from the portable key 100 through wireless communication via the antenna 211. Then, the communication device 210 supplies the received authentication code to the authentication device 230.

The door locking device 220 includes a locking mechanism 221 and a locking control unit 222.
The locking mechanism 221 is a mechanism that locks and unlocks the door of the vehicle 200, and switches between a locked state and an unlocked state by being driven based on the control of the locking control unit 222.

  The locking control unit 222 controls the locking mechanism 221 based on the result of the authentication device 230 authenticating the authentication code acquired from the portable key 100. For example, the locking control unit 222 controls the locking mechanism 221 so that the door of the vehicle 200 is locked or unlocked based on the result authenticated by the authentication device 230.

The authentication device 230 includes an authentication unit 240 and a power receiving unit 250.
The authentication unit 240 performs an authentication process for authenticating the user (electronic authentication) based on the authentication code supplied from the communication device 210, that is, the authentication code transmitted from the mobile key 100. For example, the authentication unit 240 collates the authentication code set in itself with the authentication code transmitted from the portable key 100 and determines whether or not they match. If the two match, the authentication unit 240 is an authentication code transmitted from the mobile key 100 of the authorized user who owns the vehicle 200, and thus locks information indicating that the authorized user's authentication code has been acquired. This is supplied to the controller 222.

  For example, the communication device 210 of the vehicle 200 receives the authentication code transmitted from the mobile key 100 when the authorized user who has the mobile key 100 approaches the vehicle 200 while the door of the vehicle 200 is locked. To do. In this case, the authentication unit 240 authenticates the authentication code transmitted from the portable key 100, and supplies information indicating that the authorized user's authentication code has been acquired to the locking control unit 222 based on the result of the authentication. Thereby, the locking control part 222 controls the locking mechanism 221 so that the door of the vehicle 200 is unlocked.

  On the other hand, the authentication unit 240 is transmitted from the mobile key 100 of the authorized user who owns the vehicle 200 when both the authentication code set in the mobile phone 100 and the authentication code transmitted from the mobile key 100 do not match. Since it is not an authentication code, information indicating that an authorized user authentication code has been acquired is not supplied to the locking control unit 222. Therefore, the door of the vehicle 200 is not unlocked.

  The power receiving unit 250 receives power supplied from the portable key 100. For example, the power reception unit 250 includes a power reception side contact that can physically contact a power supply side contact provided in the power supply unit 120 of the mobile key 100, and is supplied from the mobile key 100 through the contact. Receive the generated power. Then, the power receiving unit 250 supplies the power received from the portable key 100 to the authentication unit 240 and the lock control unit 222.

  FIG. 2 is an explanatory diagram for explaining an example of the configuration of the contact on the power feeding side and the contact on the power receiving side. FIG. 2A shows an external view of the vehicle 200. A door mirror 201 that is an external mirror is provided outside the vehicle 200 shown in this figure. Here, the door mirror 201 is shown in a folded state. The portion of the door mirror 201 is shown enlarged in FIG. On the lower surface of the door mirror 201, a recess 202 that is recessed upward is provided. The recess 202 is formed as a groove into which at least a part of the portable key 100 can be inserted.

  FIG. 2C shows a structure when the door mirror 201 is viewed from the front side of the vehicle 200. A power receiving side contact 251, which is a power receiving side contact, is provided on the upper surface (recessed back surface) in the recess 202 of the door mirror 201. In addition, a power supply side contact 121 that is a contact on the power supply side is provided on at least one side surface of the portable key 100. For example, each of the power receiving side contact 251 and the power feeding side contact 121 is provided as a plurality of power feeding contacts, signal line contacts, and the like according to applications. Then, when the portable key 100 is inserted into the recess 202 of the door mirror 201, the power receiving side contact 251 and the power feeding side contact 121 come into contact with each other. As a result, power can be supplied from the power supply unit 120 of the portable key 100 to the power reception unit 250 of the vehicle 200 via the power reception side contact 251 and the power supply side contact 121.

  Note that the vehicle-side battery unit 280 converts electric power supplied from a battery used for starting the engine into a predetermined voltage, the communication device 210, the locking control unit 222 of the door locking device 220, and the authentication device 230. To the authentication unit 240.

Therefore, the authentication unit 240 and the lock control unit 222 are configured to be able to supply the power supplied from the power receiving unit 250 and the power supplied from the vehicle-side battery unit 280, respectively.
For example, the authentication unit 240 and the lock control unit 222 operate using power supplied from the vehicle-side battery unit 280 in a state where power is supplied from the vehicle-side battery unit 280 (that is, during normal times) (processing and control). I do). On the other hand, the authentication unit 240 and the lock control unit 222 operate using the power supplied from the power receiving unit 250 (perform processing and control) in a state where power is not supplied from the vehicle-side battery unit 280 (that is, in an emergency).

  Here, the state in which power is not supplied from the vehicle-side battery unit 280 includes a state in which the amount of power stored in the vehicle-side battery unit 280 is reduced and power supply is not possible (a state where the battery is exhausted), In such a state, power is not available due to disconnection or the like.

  In the state where power is not supplied from the vehicle-side battery unit 280, the communication device 210 cannot acquire the authentication code from the portable key 100 by wireless communication. Therefore, the authentication code transmission unit 110 of the portable key 100 transmits the authentication code to the vehicle 200 via the power supply unit 120. For example, the authentication code is transmitted from the portable key 100 to the vehicle 200 via the power supply side contact 121 and the power receiving side contact 251 that are in contact with each other when the portable key 100 is inserted into the recess 202 of the door mirror 201.

  That is, when the power supply unit 120 supplies power to the authentication device 230, the power supply side contact 121 becomes an output unit that outputs an authentication code to the authentication device 230. Further, when the power receiving unit 250 receives power from the power supply unit 120, the power reception side contact 251 becomes an acquisition unit that acquires the authentication code output from the power supply side contact 121.

  According to the configuration of the electronic key system 1 described above, power is supplied from the portable key 100 to the vehicle 200 via the power receiving side contact 251 and the power supply side contact 121 even when power is not supplied from the vehicle side battery unit 280. The vehicle 200 performs authentication processing for authenticating the authentication code transmitted from the portable key 100 and control for locking or unlocking the door of the vehicle 200 using the supplied power. It can be carried out. For example, the electronic key system 1 uses the power required for unlocking the door from the portable key 100 in an emergency when the battery of the vehicle-side battery unit 280 is raised while the door of the vehicle 200 is locked. Is supplied to the vehicle 200, the door of the vehicle 200 can be unlocked.

  Next, in the electronic key system 1 according to the present embodiment, the operation of the unlocking process when the door of the locked vehicle 200 is unlocked from the portable key 100 in a state where power is not supplied from the vehicle battery unit 280 will be described. .

  FIG. 3 is a flowchart showing an example of the unlocking process according to the present embodiment. The unlocking process shown in FIG. 3 shows an emergency unlocking process that is performed when power is not supplied from the vehicle battery unit 280.

  First, in order to unlock the door of the locked vehicle 200 from the portable key 100, the authentication code transmission unit 110 of the portable key 100 transmits the authentication code via the antenna 111 by wireless communication. At this time, in the vehicle 200, depending on whether or not the electronic authentication in which the communication device 210 acquires the authentication code by wireless communication and the authentication unit 240 performs the authentication process is inoperative (step S110), It will be decided whether or not. When the electronic authentication is activated (normal time) (step S110: No), the vehicle-side battery unit 280 is in a state where power can be supplied (normal time), and therefore, the emergency unlocking process is not performed.

  On the other hand, when the electronic authentication is not activated in the vehicle 200 (step S110: Yes), an emergency unlocking process is performed. When the user inserts the portable key 100 into the recess 202 (groove) of the door mirror 201 of the vehicle 200, the power supply side contact 121 and the power reception side contact 251 come into contact (step S120).

  Next, when the power supply side contact 121 and the power reception side contact 251 come into contact with each other, power is supplied from the portable key 100 to the vehicle 200 (establishment of power supply by contact contact). Specifically, the power feeding unit 120 of the portable key 100 supplies the power supplied from the portable key side battery unit 180 to the power receiving unit 250 of the vehicle 200 via the power feeding side contact 121 and the power receiving side contact 251. Supply (step S130). Then, the power receiving unit 250 converts the received power into a predetermined voltage and supplies it to the authentication unit 240 and the locking control unit 222. As a result, the authentication unit 240 and the locking control unit 222 can operate with the power supplied from the power receiving unit 250.

  Subsequently, the authentication code transmission unit 110 of the portable key 100 transmits the authentication code to the vehicle 200 via the power supply side contact 121 (power supply unit 120) and the power reception side contact 251 (power reception unit 250).

  And the authentication part 240 of the vehicle 200 acquires the authentication code transmitted from the portable key 100 by the electric power feeding path in which electric power feeding was performed in step S130 (step S140). Further, the authentication unit 240 performs an authentication process for authenticating the authentication code transmitted from the portable key 100 (electronic authentication operation), and information indicating that the authentication code of the authorized user is acquired when the authentication code is the authorized user. Is supplied to the locking control unit 222 (step S150).

  When the lock control unit 222 acquires information indicating that the authentication code of the authorized user supplied from the authentication unit 240 has been acquired, the lock control unit 222 controls the locking mechanism 221 so that the door of the vehicle 200 is unlocked. Thereby, the door of the vehicle 200 is unlocked (step S160).

As described above, in the electronic key system 1 of this embodiment, the portable key 100 includes the power supply unit 120 that can supply power to the authentication device 230 mounted on the vehicle 200. The authentication device 230 includes an authentication unit 240 that performs an authentication process based on the authentication code transmitted from the power supply unit 120 and a power reception unit 250 that receives the power supplied from the portable key 100. And the authentication part 240 performs the authentication process based on an authentication code using the electric power which the power receiving part 250 received.
Thereby, the authentication device 230 according to the present embodiment can authenticate the authorized user with the portable key 100 without requiring the power from the battery mounted on the vehicle.

For example, the authentication unit 240 performs the authentication process using the power supplied from the vehicle-side battery unit 280 mounted on the vehicle 200, and receives power when the power is not supplied from the vehicle-side battery unit 280. The authentication may be performed using the power received by the unit 250.
As a result, the authentication device 230 according to the present embodiment can authenticate a legitimate user using the portable key 100 even when power cannot be supplied from the vehicle-side battery unit 280 mounted on the vehicle 200.

Note that the authentication unit 240 may perform the authentication based on the power received by the power receiving unit 250 even when the vehicle-side battery unit 280 can supply power.
As a result, the authentication device 230 performs an authentication process for authenticating (electronic authentication) the authentication code transmitted from the portable key 100 using the power supplied from the portable key 100 without being supplied with power from the vehicle-side battery unit 280. Therefore, the authentication process can be performed regardless of whether or not power can be supplied from the vehicle side battery unit 280. Therefore, even when the power of the vehicle-side battery unit 280 mounted on the vehicle 200 is insufficient, it is possible to authenticate a regular user using the portable key 100.

In addition, the power supply unit 120 of the mobile key 100 uses the power of the mobile key side battery unit 180 that supplies power to the authentication code transmission unit 110 via the power reception side contact 251 and the power supply side contact 121 to authenticate the vehicle 200. 230.
As described above, in the electronic key system 1 according to the present embodiment, since the power of the mobile key side battery unit 180 of the mobile key 100 is used as power for power supply, power is supplied to the authentication device 230 with a simple configuration. be able to.

  In addition, the portable key 100 is attached to the authentication code transmission unit 110 that transmits the authentication code to the authentication device 230 by wireless communication and the power supply unit 120, and the power supply unit 120 supplies power to the authentication device 230. In addition, a power supply-side contact 121 that outputs an authentication code to the authentication device 230 is provided. The authentication device 230 is attached to the communication device 210 that receives the authentication code transmitted from the authentication code transmission unit 110 and the power reception unit 250. When the power reception unit 250 receives power from the power supply unit 120, the authentication device 230 And a power receiving side contact 251 for acquiring the authentication code output from the contact 121.

  Thus, during normal times (when the vehicle-side battery unit 280 can supply power), the authentication device 230 acquires the authentication code from the portable key 100 by wireless communication, and in an emergency (the vehicle-side battery unit 280 cannot supply power). ), The authentication device 230 can acquire the authentication code from the portable key 100 via the power feeding path without using wireless communication. Therefore, even if the communication device 210 cannot operate because power cannot be supplied from the battery mounted on the vehicle 200, the authentication device 230 can perform the authentication process by acquiring the authentication code from the portable key 100. .

  In addition, the locking control unit 222 of the vehicle 200 sets the locking mechanism 221 to unlock the locked door based on the result of the authentication processing performed by the authentication unit 240 based on the authentication code acquired from the portable key 100. Control. Then, the locking control unit 222 of the vehicle 200 controls to unlock the door based on the electric power supplied from the vehicle-side battery unit 280, and receives power when the electric power is not supplied from the vehicle-side battery unit 280. Control is performed so that the door is unlocked based on the power received by unit 250.

  Thereby, even when the lock control unit 222 cannot supply power from the vehicle-side battery unit 280, the lock can be unlocked by the power supplied from the portable key 100. Therefore, even when the electric key system 1 cannot supply power from the vehicle-side battery unit 280 mounted on the locked vehicle 200, the electronic key system 1 can authenticate the authorized user with the portable key 100 and unlock the door. be able to.

Further, in the vehicle 200 according to the present embodiment, a recessed portion 202 that is recessed upward is provided on the lower surface of the door mirror 201, and a power receiving unit 250 is provided in the recessed portion 202.
As described above, in the electronic key system 1, for example, the power receiving side contact 251 used for power feeding is provided in a place where water or dust that is recessed upward from the lower surface of the door mirror 201 is difficult to enter. It is possible to suppress adverse effects caused by dust and garbage.

  In addition, with reference to FIG. 2, although the electric power feeding part 120 of the portable key 100 and the power receiving part 250 of the vehicle 200 were contacted via the contact, the example in which electric power feeding is performed from the portable key 100 to the vehicle 200 was demonstrated. Instead of the contact point, power may be supplied in a state of being connected via a harness.

  Further, when the vehicle-side battery unit 280 can supply power and the portable key-side battery unit 180 cannot supply power, the power supplied from the vehicle-side battery unit 280 is used as the power-supply-side contact 121. Power may be supplied from the vehicle 200 to the portable key 100 via the power receiving side contact 251.

<Second Embodiment>
Next, a second embodiment of the present invention will be described.
In the first embodiment described above, a configuration example in which power is supplied from the portable key 100 to the vehicle 200 in a state where the power feeding unit 120 of the portable key 100 and the power receiving unit 250 of the vehicle 200 are in contact via a contact point. explained. In the present embodiment, a configuration example in which power is supplied in a non-contact state will be described.

FIG. 4 is a configuration diagram illustrating an example of a schematic configuration of the electronic key system 1A according to the present embodiment. 4, the same reference numerals are given to the components corresponding to those in FIG. 1, and the description thereof is omitted.
The basic configuration of the electronic key system 1A according to the present embodiment is the same as the configuration of the electronic key system 1 shown in FIG. 1, and includes a portable key 100A and a vehicle 200A. The power feeding method between the portable key 100A and the vehicle 200A according to the present embodiment is a non-contact power feeding method (non-contact power feeding). And different. The portable key 100A includes a power feeding unit 120A that supplies power to the vehicle 200 in a non-contact state. Further, the authentication device 230A of the vehicle 200A includes a power receiving unit 250A that receives power from the portable key 100 in a non-contact state.

  FIG. 5 is an explanatory diagram illustrating a specific example of a non-contact power feeding method. The power feeding unit 120A of the portable key 100A includes a coil 122 and a magnet 123, and is provided inside the portable key 100A. As shown in FIG. 5, the coil 122 is arranged in a direction in which the central axis of the coil 122 is parallel to an axis perpendicular to the surface (widest surface) of the portable key 100A. The magnet 123 is a rod-shaped magnet (magnetic body) having two poles (S pole and N pole), and is arranged inside the coil 122 in a direction perpendicular to the central axis of the coil 122. Note that the coil 122 and the magnet 123 are arranged in a non-contact manner.

  On the other hand, the power receiving unit 250A of the vehicle 200A includes a coil 252 and a magnet 253, and is provided inside the door of the vehicle 200A. The coil 252 is arranged so that the central axis of the coil 252 is parallel to an axis perpendicular to the door surface. The magnet 253 is a rod-shaped magnet (magnetic body) having two poles (S pole and N pole) similarly to the magnet 123, and is arranged inside the coil 252 in a direction perpendicular to the central axis of the coil 252. Has been. Note that the coil 252 and the magnet 253 are arranged in a non-contact manner. The position where the coil 252 and the magnet 253 are disposed is a predetermined position when the portable key 100A is held over the door.

  In addition, when the power feeding unit 120A of the portable key 100A is held at a predetermined position in a predetermined posture, the above-described holding is performed so that the magnetic key does not attract or repel the portable key 100A and the door of the vehicle 200. In such a state, the magnet 123 and the magnet 253 are arranged so that the direction of the magnet 123 and the direction of the magnet 253 are perpendicular to each other. Here, the predetermined posture is the posture of the portable key 100A with respect to the power receiving unit 250A when the portable device 100A is held over so that the authentication device 230A can execute the authentication process.

  Here, the magnet 123 and the magnet 253 are trigger magnets for starting power feeding. By bringing the power feeding unit 120A of the portable key 100A close to the power receiving unit 250A provided on the door of the vehicle 200A, a magnetic force change occurs between the coil 122 and the coil 252, and the coil 122 is changed according to the generated magnetic force change. Inductive power is temporarily generated in the coil 252 as a trigger signal for starting feeding. In response to the trigger signal, in the portable key 100A, when the electric power supplied from the portable key side battery unit 180 is converted into high-frequency AC power and passed through the coil 122, it is induced in the coil 252 of the vehicle 200A by the principle of electromagnetic induction. A current is generated. Thus, power is supplied from the portable key 100A to the vehicle 200A in a non-contact state.

Here, with reference to FIG. 6, power supply by an electromagnetic induction method using the principle of electromagnetic induction will be described. FIG. 6 is an explanatory diagram for explaining power feeding by an electromagnetic induction method.
Magnetic flux is generated by passing a high-frequency alternating current through the primary coil L1 (power transmission side coil), and AC electromotive force is generated when the generated magnetic flux passes through the secondary coil L2 (power reception side coil). Thereby, an induced current is generated in the secondary coil L2, and power can be supplied from the primary coil L1 to the secondary coil L2. For example, the coil 122 of the portable key 100A is used as the primary coil L1, and the coil 252 of the vehicle 200A is used as the secondary coil L2, so that power can be supplied from the portable key 100A to the vehicle 200A in a non-contact manner.

  In addition, the coil 122 of the portable key 100A is used as the secondary coil L2, and the coil 252 of the vehicle 200A is used as the primary coil L1, so that power can be supplied from the vehicle 200A to the portable key 100A in a non-contact manner. For example, when the vehicle-side battery unit 280 can supply power and the portable key-side battery unit 180 cannot supply power, the electric power supplied from the vehicle-side battery unit 280 is supplied from the vehicle 200A to the portable key 100A. Power may be supplied in a non-contact manner.

In addition, it is good also as a structure which replaces with an electromagnetic induction system and supplies electric power non-contact using a magnetic resonance system. FIG. 7 is an explanatory diagram for explaining power feeding by the magnetic resonance method.
In the magnetic resonance method, a primary side resonance circuit K1 including a primary coil L1 (power transmission side coil) and a secondary side resonance circuit K2 including a secondary coil L2 (power reception side coil) are used as a primary. By causing the secondary side resonance circuit K2 to resonate with the electromagnetic field generated by passing a high-frequency alternating current through the side resonance circuit K1, an induced current is generated in the secondary side resonance circuit K2. For example, the portable key 100A includes the primary side resonance circuit K1, and the vehicle 200A includes the secondary side resonance circuit K2, so that power can be supplied from the portable key 100A to the vehicle 200A in a non-contact manner. In the case of the magnetic resonance method, the portable key 100A includes the secondary resonance circuit K2, and the vehicle 200A includes the primary resonance circuit K1, so that the vehicle 200A can supply power to the portable key 100A in a non-contact manner. May be.

Next, with reference to FIG. 8, the operation of the unlocking process in which power is supplied from the portable key 100A to the vehicle 200A in a non-contact manner and the door of the locked vehicle 200A is unlocked from the portable key 100A will be described. .
FIG. 8 is a flowchart showing an example of the unlocking process according to the present embodiment. The unlocking process shown in FIG. 8 shows an emergency unlocking process that is performed when power is not supplied from the vehicle-side battery unit 280, similarly to the unlocking process shown in FIG.

  The process of step S210 is the same as the process of step S110 shown in FIG. 3, and when the electronic authentication is not activated in the vehicle 200A (step S210: Yes), the emergency unlocking process is performed.

  When the user holds the portable key 100A over a predetermined position of the door of the vehicle 200A (a position where the portable key 100 is held) and the coils (coil 122 and coil 252) approach each other (step S220), the trigger magnet ( The magnetic forces of the magnet 123 and the magnet 253 enter the respective opposing coil (step S230).

  Thereby, the magnetic force change with respect to the coil 122 and the coil 252 generate | occur | produces, and the electric current as a trigger signal of electric power feeding start generate | occur | produces in the coil 122 and the coil 252 (step S240).

  Next, triggered by the generation of the current as the trigger signal, control is performed on the side where the power that can be supplied remains, so that a high-frequency alternating current flows through the coil using the power. Here, since power that can be supplied to the portable key 100A side remains, the power feeding unit 120A converts the power supplied from the portable key side battery unit 180 into a high-frequency alternating current in response to the trigger signal. Flow through the coil 122. When a high-frequency alternating current flows through the coil 122, an induced current is generated in the coil 252. Thereby, power receiving unit 250A of vehicle 200A receives power from portable key 100A. That is, power is supplied from the portable key 100A to the vehicle 200A in a non-contact manner (non-contact power supply establishment, step S250). Then, the power receiving unit 250 </ b> A supplies the received power to the authentication unit 240 and the lock control unit 222. As a result, the authentication unit 240 and the locking control unit 222 can operate with the power supplied from the power receiving unit 250A.

  Subsequently, the authentication code transmission unit 110 of the portable key 100A transmits the authentication code to the vehicle 200A via the power supply path where power is supplied in a non-contact manner (via the power supply unit 120A and the power reception unit 250A). To do. The authentication unit 240 of the vehicle 200A acquires the authentication code transmitted from the portable key 100A (step S260).

  Specifically, using power communication using electromagnetic induction, the coil 122 of the power feeding unit 120A outputs an authentication code to the coil 252 of the power receiving unit 250A, and the coil 252 of the power receiving unit 250A is output from the coil 122. Get the authentication code. That is, when the power feeding unit 120A supplies power to the authentication device 230A, the coil 122 serves as an output unit that outputs an authentication code to the authentication device 230A. In addition, when the power receiving unit 250 </ b> A receives power from the power feeding unit 120 </ b> A, the coil 252 serves as an acquisition unit that acquires the authentication code output from the coil 122.

  The processes in steps S270 and S280 below are the same as the processes in steps S150 and S160 shown in FIG. The authentication unit 240 performs an authentication process for authenticating the authentication code transmitted from the portable key 100A (electronic authentication operation), and locks information indicating that the authentication code of the authorized user has been acquired if the authentication code is the authorized user authentication code. It supplies to the control part 222 (step S270). And the locking control part 222 will control the locking mechanism 221 so that the door of the vehicle 200A may be unlocked, if the information which shows having acquired the authentication code of the authorized user is acquired. Thereby, the door of the vehicle 200A is unlocked (step S280).

As described above, in the electronic key system 1A according to the present embodiment, the power feeding unit 120A of the mobile key 100A is configured to be used for the mobile key side battery unit 180 that supplies power to the authentication code transmitting unit 110 that transmits the authentication code by wireless communication. Electric power is supplied to the authentication device 230A of the vehicle 200A using a non-contact power feeding method.
That is, as in the first embodiment, the electronic key system 1A uses the power of the portable key side battery unit 180 of the portable key 100A as power supply power. Therefore, the electronic key system 1A provides power to the authentication device 230A with a simple configuration. Can be supplied. Moreover, in this embodiment, since a contact point is not required outside by using a non-contact power feeding method, adverse effects due to water, dust, and the like can be suppressed.

  For example, each of the power feeding unit 120A and the power receiving unit 250A includes a coil and a magnetic body. The coils included in the power feeding unit 120A and the power receiving unit 250A are temporarily caused by the magnetic force generated by the magnetic bodies included in the power feeding unit 120A and the power receiving unit 250A when the power feeding unit 120A and the power receiving unit 250A approach each other. Inductive power is generated. Then, the power feeding unit 120A uses the power of the portable key side battery unit 180 mounted on the portable key 100A when the coil 122 included in the power feeding unit 120A generates dielectric power due to the proximity of the magnetic body of the power receiving unit 250A. Is used to pass a current through the coil 122 included in the power feeding unit 120A. On the other hand, the power receiving unit 250A receives the induced current flowing in the coil 252 included in the power receiving unit 250A in response to the current flowing in the coil 122 included in the power feeding unit 120A.

  Thereby, even when the electronic key system 1A cannot supply power from the vehicle-side battery unit 280 mounted on the vehicle 200A, when the power feeding unit 120A of the portable key 100A approaches the power receiving unit 250A of the vehicle 200, The power of the portable key side battery unit 180 mounted on the portable key 100A can be supplied to the power receiving unit 250A.

Each of the magnetic bodies included in the power feeding unit 120A and the power receiving unit 250A is a rod-shaped magnet having two poles. When the power feeding unit 120A is held over the power receiving unit 250A in a predetermined posture, the orientation of each magnet Are provided at right angles to each other.
Thereby, when the power feeding unit 120A of the portable key 100A is held over the power receiving unit 250A in a predetermined posture, it is possible to prevent suction and repulsion between the portable key 100A and the door of the vehicle 200 due to magnetic force. .

  The portable key 100A is attached to the authentication code transmitting unit 110 that transmits an authentication code to the authentication device 230A by wireless communication and the power supply unit 120A, and the power supply unit 120A supplies power to the authentication device 230A. Further, a coil 122 that outputs an authentication code to the authentication device 230A is provided. The authentication device 230A is attached to the power receiving unit 250A and the communication device 210 that receives the authentication code transmitted from the authentication code transmitting unit 110. When the power receiving unit 250A receives power from the power feeding unit 120A, the coil 122 And a coil 252 for acquiring the authentication code output from.

  Thus, during normal times (when the vehicle-side battery unit 280 can supply power), the authentication device 230A acquires the authentication code from the portable key 100A through wireless communication, and in an emergency (the vehicle-side battery unit 280 cannot supply power). ), The authentication device 230A can obtain the authentication code from the portable key 100A via the power feeding path without using wireless communication. Therefore, even when power cannot be supplied from the battery mounted on the vehicle 200A and the communication device 210 cannot operate, the authentication device 230A can acquire the authentication code from the portable key 100A and perform the authentication process. .

  Accordingly, as in the first embodiment, the electronic key system 1A authenticates the authorized user using the portable key 100A even when power cannot be supplied from the vehicle-side battery unit 280 mounted on the locked vehicle 200A. The door can be unlocked.

<Third Embodiment>
Next, a third embodiment of the present invention will be described.
In the present embodiment, a configuration in which power is supplied by a power generation mechanism that generates power will be described. Here, as an example of the power generation mechanism, a power generation mechanism using slide power generation will be described as an example. In addition, the slide type power generation means, for example, by sliding (sliding) a magnetic stripe in which a plurality of magnetic bodies are arranged in a row with respect to a coil array in which a plurality of coils are arranged in a row. Electric power is generated by the principle of electromagnetic induction. By sliding the magnetic stripe with respect to the coil array, a magnetic force change with respect to the coil array is continuously generated, and a current flows through the coil array.

FIG. 9 is a configuration diagram illustrating an example of a schematic configuration of the electronic key system 1B according to the present embodiment. In FIG. 9, the components corresponding to those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.
The basic configuration of the electronic key system 1B according to the present embodiment is the same as the configuration of the electronic key systems 1 and 1A shown in FIGS. 1 and 4, and includes a portable key 100B and a vehicle 200B. In the present embodiment, each of the power feeding unit 120B included in the portable key 100B and the power receiving unit 250B included in the authentication device 230B of the vehicle 200B includes at least a part of a power generation mechanism using sliding power generation.

  FIG. 10 is an explanatory diagram for explaining a specific example of the power feeding method using the slide-type power generation, and shows an enlarged portion of the door mirror 201 as in FIG. The power receiving unit 250B of the vehicle 200B includes a coil array 310. The power supply unit 120B of the portable key 100B includes a magnetic stripe 320. The coil array 310 and the magnetic stripe 320 are a part of a power generation mechanism by sliding power generation. Here, an example of sliding power generation is shown in which power is generated by sliding the portable key 100B in a state where the portable key 100B is inserted into the recess 202 (groove) of the door mirror 201 shown in FIG.

  Specifically, a coil array 310 in which a plurality of coils are arranged in a row is provided inside the recess 202 into which the portable key 100B is inserted. Further, the mobile key 100B is provided with a magnetic stripe 320 in which a plurality of magnetic bodies are arranged in a line. In addition, the coil array 310 and the magnetic stripe 320 are configured to face each other with the portable key 100B inserted into the recess 202.

  When the portable key 100B is inserted into the recess 202 and is slid in a predetermined direction along the row of the coil array 310 and the magnetic stripe 320, a magnetic force change is continuously generated on the coil array 310, and the generated magnetic force is generated. A current flows through the coil array 310 based on the principle of electromagnetic induction according to the change. Thereby, electric power can be generated and supplied to vehicle 200B. Note that the predetermined direction described above is a sliding direction (sliding direction shown in FIG. 10) determined as a direction in which the inserted portable key 100B is slid with the portable key 100B inserted into the recess 202. .

In addition, by sliding with the portable key 100B inserted into the recess 202, the authentication device 230B of the vehicle 200B reads the authentication code from the portable key 100 as well as power feeding.
FIG. 11 is a cross-sectional view of the recess 202 shown in FIG. 10 taken along line AA. The power feeding unit 120B of the portable key 100B further includes a magnetic stripe 330 (recording unit) on which an authentication code is recorded. The power receiving unit 250B of the vehicle 200B further includes a code reading unit 340 for reading the authentication code recorded on the magnetic stripe 330. In FIG. 10, illustration of the magnetic stripe 330 and the code reading unit 340 shown in FIG. 11 is omitted.

  As shown in FIG. 11, in addition to the magnetic stripe 320, the portable key 100B is provided with a magnetic stripe 330 on which an authentication code is recorded. In addition to the coil array 310, a code reading unit 340 is disposed in the recess 202. Here, the magnetic stripe 330 of the portable key 100B and the code reading unit 340 of the concave portion 202 are configured to face each other with the portable key 100B inserted into the concave portion 202. Therefore, the authentication device 230B can acquire the authentication code from the mobile key 100B by sliding the mobile phone 100B inserted into the recess 202. That is, the magnetic stripe 330 becomes an output unit that outputs an authentication code to the authentication device 230, and the code reading unit 340 becomes an acquisition unit that acquires the authentication code output from the magnetic stripe 330.

Next, with reference to FIG. 12, the operation of the unlocking process in which the vehicle 200B is powered by sliding power generation and the door of the locked vehicle 200B is unlocked from the portable key 100B will be described.
FIG. 12 is a flowchart illustrating an example of the unlocking process according to the present embodiment. The unlocking process shown in FIG. 12 shows an emergency unlocking process that is performed when power is not supplied from the vehicle-side battery unit 280, similarly to the unlocking process shown in FIG.

  The process of step S310 is the same as the process of step S110 shown in FIG. 3, and when the electronic authentication is not activated in the vehicle 200B (step S310: Yes), the emergency unlocking process is performed.

  When the user inserts the portable key 100B into the recess 202 (groove) of the door mirror 201 of the vehicle 200B and slides it in the sliding direction (step S320), a current flows through the coil array 310 based on the principle of electromagnetic induction due to the sliding. Is generated (step S330), and the power receiving unit 250B of the vehicle 200 receives power. That is, power is supplied to the vehicle 200B (power supply is established, step S340). Then, the power receiving unit 250B supplies the received power to the authentication unit 240 and the lock control unit 222. As a result, the authentication unit 240 and the lock control unit 222 can operate with the power supplied from the power receiving unit 250B.

  When the portable key 100B is inserted and slid into the recess 202 (groove), the code reading unit 340 of the recess 202 reads the authentication code from the magnetic stripe 330 on which the authentication code of the mobile key 100B is recorded. Here, the operation in which the code reading unit 340 reads the authentication code is also performed using the power received by the power receiving unit 250B (power generated by the sliding power generation). And the authentication part 240 of the vehicle 200B acquires the authentication code which the code reading part 340 read. That is, the authentication unit 240 acquires the authentication code from the portable key 100B through the path (the path from the power supply unit 120B to the power reception unit 250B) where power is supplied by sliding power generation (step S350).

  The processes in steps S360 and S370 below are the same as the processes in steps S150 and S160 shown in FIG. The authentication unit 240 performs an authentication process for authenticating the authentication code transmitted from the portable key 100B (electronic authentication operation), and locks information indicating that the authentication code of the authorized user is acquired when the authentication code is the authorized user authentication code. It supplies to the control part 222 (step S360). And the locking control part 222 will control the locking mechanism 221 so that the door of the vehicle 200B may be unlocked, if the information which shows having acquired the authentication code of the authorized user is acquired. Thereby, the door of vehicle 200B is unlocked (step S370).

  As described above, in the electronic key system 1B according to the present embodiment, power is supplied to the vehicle 200B by a power generation mechanism that generates power (for example, a power generation mechanism using slide power generation). Here, the power feeding unit 120B includes at least a part of the power generation mechanism (for example, the magnetic stripe 320). Then, the power receiving unit 250B supplies the power generated by the power generation mechanism to the authentication device 230B.

  Thus, the electronic key system 1B can supply power to the authentication device 230B of the vehicle 200B even when both the vehicle-side battery unit 280 and the portable key-side battery unit 180 cannot supply power. It is possible to authenticate a regular user using a portable key.

For example, the power generation mechanism includes a magnetic body (for example, the magnetic stripe 320) included in the power feeding unit 120B and a coil (for example, the coil array 310) that is included in the power receiving unit 250B and generates dielectric power by the magnetic force generated by the magnetic body. And.
Thereby, the electronic key system 1B can use electric power generated by the interaction between the magnetic body and the coil, and can generate electric power to be supplied to the authentication device 230B with a simple configuration.

Specifically, in the portable key 100B, as the magnetic stripe 320, a plurality of magnetic materials are arranged in a line. In the recess 202 of the vehicle 200B, a plurality of coils are arranged in a row as the coil array 310.
As a result, the electronic key system 1B slides in the sliding direction with the portable key 100B inserted into the recess 202, so that a plurality of magnetic bodies included in the magnetic stripe 320 are continuously generated in the coil array 310. Therefore, sufficient power for authenticating the authentication code and unlocking the door can be secured.

  The portable key 100B is attached to the authentication code transmitting unit 110 that transmits an authentication code to the authentication device 230B by wireless communication and the power supply unit 120B, and the power supply unit 120B supplies power to the authentication device 230B. In addition, a magnetic stripe 330 for outputting an authentication code to the authentication device 230B is provided. The authentication device 230B is attached to the power receiving unit 250B and the communication device 210 that receives the authentication code transmitted from the authentication code transmitting unit 110. When the power receiving unit 250B receives power from the power feeding unit 120B, the magnetic stripe And a code reading unit 340 for acquiring the authentication code output from 330.

  Thus, during normal times (when the vehicle-side battery unit 280 can supply power), the authentication device 230B acquires the authentication code from the portable key 100B by wireless communication, and in an emergency (the vehicle-side battery unit 280 cannot supply power). ), The authentication device 230B can acquire the authentication code from the portable key 100B via the power feeding path without using wireless communication. Therefore, even when the communication device 210 cannot operate because power cannot be supplied from the battery mounted on the vehicle 200B, the authentication device 230B can acquire the authentication code from the portable key 100B and perform the authentication process. .

  Therefore, as in the first and second embodiments, the electronic key system 1B is a legitimate user using the portable key 100B even when power cannot be supplied from the vehicle-side battery unit 280 mounted on the locked vehicle 200B. Authentication is possible and the door can be unlocked.

  As the configuration of the sliding power generation, the configuration example of the coil array 310, the magnetic stripe 320, the magnetic stripe 330, and the code reading unit 340 has been described with reference to FIGS. 8 and 9, but the above configuration example is an example. Therefore, it can be changed as appropriate. For example, it is good also as a structure like the modification 1 and the modification 2 of the structure of the slide type power generation shown below.

(Variation 1 of the configuration of the slide power generation)
First, Modification Example 1 of the configuration of the sliding power generation will be described.
The configuration of power supply by sliding power generation described with reference to FIGS. 10 and 11 is a configuration in which power is generated by generating power on the vehicle 200B side, but power is generated on both the vehicle 200B and the portable key 100B. It may be configured to supply power. In the sliding power generation, power is generated on the coil array 310 side. Therefore, the coil array 310 may be provided on the portable key 100B side separately from the recess 202. In other words, the coil array 310 and the magnetic stripe 320 are interchangeably held by the concave portion 202 and the portable key 100B, so that it is possible to generate power and supply power to both the vehicle 200B and the portable key 100B.

  FIG. 13 is a diagram for explaining a first modification of the configuration of the sliding power generation, and is an explanatory diagram for explaining an example of a configuration in which electric power is generated and supplied to both the vehicle 200B and the portable key 100B by the sliding power generation. is there. FIG. 13 is a cross-sectional view of the concave portion 202 shown in FIG. 10 cut along the line AA in the same manner as FIG. 11.

  In the example shown in FIG. 13, the coil array 310 and the magnetic stripe 320 facing each other with the portable key 100 </ b> B inserted into the recess 202 are configured in two stages. In the first stage and the second stage, the coil array 310 and the magnetic stripe 320 are arranged so as to be interchanged between the recess 202 and the portable key 100B.

  Specifically, in the first stage, the coil array 310 disposed in the recess 202 and the magnetic stripe 320 disposed in the portable key 100B are configured to face each other. In the second stage, contrary to the first stage, the magnetic stripe 320 arranged in the recess 202 and the coil array 310 arranged in the portable key 100B face each other.

  In the configuration shown in FIG. 13, by sliding the portable key 100B inserted into the recess 202, it is possible to generate power and supply power to both the vehicle 200B and the portable key 100B.

(Modification 2 of the configuration of the sliding power generation)
Next, Modification Example 2 of the configuration of the sliding power generation will be described. Here, another configuration example of the arrangement of the magnetic stripe 330 in which the authentication code is recorded and the code reading unit 340 will be described.
FIG. 14 is a diagram illustrating a second modification of the configuration of the sliding power generation. FIG. 14 is a cross-sectional view of the recess 202 shown in FIG. 10 cut along the line BB, and shows the configuration of Modification 2 in this cross-sectional view.

  In the portable key 100B, authentication is performed on the outer side of one end (for example, the end opposite to the sliding direction) of both ends of the magnetic stripe 320 in which a plurality of magnetic materials are arranged in the sliding direction. A magnetic stripe 330 on which a code is recorded is arranged. In the concave portion 202, the code reading unit 340 is disposed outside the end portion on the side in the sliding direction among both end portions of the row of the coil array 310 in which a plurality of coils are arranged side by side in the sliding direction.

  In the configuration shown in FIG. 14, when the portable key 100 is slid into the concave portion 202, the magnetic stripe 320 first passes through the coil array 310, and then the magnetic force is applied to the code reading unit 340. The stripe 330 passes. Therefore, first, power is generated in the coil array 310, and then the code reading unit 340 reads the authentication code from the magnetic stripe 330.

As described above, in the configuration of the modification example 2, in the portable key 100B, one end (for example, the opposite side to the sliding direction) of both ends of the row of the magnetic stripe 320 in which a plurality of magnetic bodies are arranged in the sliding direction is provided. A magnetic stripe 330 on which an authentication code is recorded is arranged outside the end portion. Then, the authentication device 230B receives the dielectric power generated in the coil array 310 by the magnetic force generated by the magnetic body of the magnetic stripe 320 when the portable key 100 is slid in the sliding direction with respect to the power receiving unit 250B, and thereafter The authentication code output by the magnetic stripe 330 is acquired.
As described above, when the portable key 100B is inserted into the concave portion 202 and is slid in the sliding direction, the authentication device 230B reads the authentication code after power is generated in the coil array 310, so that the authentication code is reliably acquired. can do.

  In the third embodiment, the portable key 100B has been described with the configuration in which the magnetic stripes 320 in which a plurality of magnetic bodies are arranged in a line are provided, but the configuration in which one magnetic body is arranged may also be used. Good. In addition, although the configuration in which the coil array 310 in which a plurality of coils are arranged in a row is provided in the concave portion 202 of the vehicle 200B has been described, a configuration in which one coil is disposed may be employed.

  In the third embodiment, as an example of the power generation mechanism, the power generation mechanism by the slide type power generation is described as an example. However, the mechanism is not limited to the mechanism by the slide type power generation, and any mechanism that generates power can be used. Other power generation mechanisms may be used. For example, the power generation mechanism may be a hand-powered generator that generates power by manually turning a handle.

  As mentioned above, although the form for implementing this invention was demonstrated using embodiment, this invention is not limited to such embodiment at all, In the range which does not deviate from the summary of this invention, various deformation | transformation and substitution Can be added. For example, in the vehicle 200 (200A, 200B), the place where the power receiving unit 250 (250A, 250B) is provided is not limited to the door or the door mirror 201 of the vehicle 200 (200A, 200B), but the vehicle 200 (200A , 200B) may be located anywhere.

1, 1A, 1B Electronic key system, 100, 100A, 100B Mobile key, 110 Authentication code transmission unit (transmission unit), 120, 120A, 120B Power supply unit, 121 Power supply side contact (output unit), 122 Coil (output unit) , 123 magnet, 180 mobile key side battery unit (mobile key side battery), 200 vehicle, 201 door mirror (external mirror), 202 recess, 210 communication device, 211 antenna, 220 door locking device, 221 locking mechanism, 222 locking control unit 230, 230A, 230B Authentication device, 240 Authentication unit, 250, 250A, 250B Power reception unit, 251 Power reception side contact (acquisition unit), 252 Coil (acquisition unit), 253 Magnet, 280 Vehicle side battery unit (vehicle side battery) 310 coil array, 320 magnetic stripe, 30 magnetic stripe (output unit), 340 code reading section (obtaining section)

Claims (11)

An electronic key system comprising: a portable key that outputs authentication information for authenticating a user; and an authentication device that is mounted on a vehicle and performs an authentication process based on the authentication information,
The portable key is
A power supply unit capable of supplying power to the authentication device;
The authentication device
A power receiving unit that receives power supplied from the power supply unit;
An authentication unit capable of executing an authentication process based on the authentication information using the power received by the power reception unit,
Electronic key system. The authentication unit
The authentication process is performed using the power supplied from the vehicle-side battery mounted on the vehicle, and when the power is not supplied from the vehicle-side battery, the authentication process is performed using the power received by the power receiving unit. I do,
The electronic key system according to claim 1. The vehicle and the portable key include a power feeding path that supplies power from the power feeding unit to the power receiving unit,
The authentication device
When the power receiving unit receives power from the power supply unit, the authentication information is received from the portable key through the power supply path.
The electronic key system according to claim 1 or 2. The portable key is
A transmission unit for transmitting the authentication information to the authentication device by wireless communication;
The power feeding unit is
The electronic key system according to any one of claims 1 to 3, wherein power of a portable key side battery mounted on the portable key and supplying power to the transmission unit is supplied to the authentication device. Each of the power feeding unit and the power receiving unit includes a coil and a magnetic body,
Each coil included in the power feeding unit and the power receiving unit is:
When the power feeding unit and the power receiving unit approach each other, the induction power is temporarily generated by the magnetic force generated by each magnetic body included in the power feeding unit and the power receiving unit,
The power feeding unit is
Triggered by the fact that the coil included in the power supply unit generates dielectric power due to the approach of the magnetic body, the current supplied to the coil included in the power supply unit is caused to flow using the power of the battery on the mobile key side mounted on the mobile key. ,
The power receiving unit
In response to the current flowing in the coil included in the power feeding unit, the induced current flowing in the coil included in the power receiving unit is received.
The electronic key system according to any one of claims 1 to 4. Each magnetic body included in the power feeding unit and the power receiving unit is:
It is a rod-shaped magnet having two poles, and when the power feeding unit is held over the power receiving unit in a predetermined posture, the respective magnets are provided so that their directions are perpendicular to each other.
The electronic key system according to claim 5. The power feeding unit is
Comprising at least a part of a power generation mechanism for generating power,
The power receiving unit
Supplying the power generated by the power generation mechanism to the authentication unit;
The electronic key system according to any one of claims 1 to 3. The power generation mechanism is
A magnetic body provided in the power feeding unit;
The power receiving unit includes a coil that generates dielectric power by a magnetic force generated by the magnetic body.
The electronic key system according to claim 7. In the portable key,
A plurality of the magnetic bodies are arranged in a row,
An output part that outputs the authentication information is arranged outside one end part of both ends of the row in which a plurality of the magnetic bodies are arranged,
The authentication device
When the portable key is slid in a predetermined direction along the row with respect to the power receiving unit, the portable key receives dielectric power generated in the coil by a magnetic force generated by the magnetic body, and then outputs the output unit. Obtaining the authentication information output by
The electronic key system according to claim 8. The vehicle is
An external mirror provided outside the vehicle,
The lower surface of the external mirror is provided with a recess that is recessed upward.
The power receiving unit is provided in the recess,
The electronic key system according to any one of claims 1 to 9. The vehicle is
Door,
A locking mechanism for locking and unlocking the door;
A locking control unit that controls the locking mechanism to unlock the locked door based on a result of the authentication unit performing an authentication process based on the authentication information acquired from the portable key. ,
The locking control unit
The locking mechanism is controlled to unlock the door based on electric power supplied from a vehicle-side battery mounted on the vehicle, and when no electric power is supplied from the vehicle-side battery, the power receiving unit Controlling the locking mechanism to unlock the door based on the received power;
The electronic key system according to any one of claims 1 to 10.

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