JPH0738503U - License type electronic key device and electronic lock device using the same - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a license-type electronic key device that can facilitate operation of an electronic lock device, prevent non-carrying of a license, and can reduce weight and simplify maintenance. [Structure] Electronic license key device 10 according to the present invention
Is provided with a coil antenna 11 and a signal generating integrated circuit 19 connected to the coil antenna 11 in a license 18, and the signal generating integrated circuit 19 receives a specific fluctuating magnetic field via the coil antenna 11. A power generation circuit 12 that sometimes generates power, a key side memory 14 that stores a transmission side code signal, and a key side that includes a transmission side code signal of the key side memory 14 when power is supplied from the power generation circuit 12. It has a key side oscillation circuit 13 that emits a fluctuating magnetic field from the coil antenna 11 to space. Since the electronic lock device can be operated without contacting the license as the electronic key device without removing it from the body, the operation can be facilitated and the license can be prevented from being uncarried. In addition, the built-in battery is not required, and the weight and maintenance can be simplified.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a license-type electronic key device that can control a controlled object such as a lock device in a contactless manner by using a specific fluctuating magnetic field, and an electronic lock device using the same.

[0002]

[Prior art]

 For example, a contact type IC having a bar code or a data generating circuit is incorporated in a driver's license, and this is installed in the driver's seat of a vehicle such as an automobile (which may be an aircraft or a ship) or a contact for signal transmission / reception. An electronic lock device, which is capable of running when the data of a driver's license is read by being put in a reading device having a key and the data matches preset data, has been widely used. In addition, an electronic lock device using a so-called IC card having a built-in microcomputer, memory, etc. has been actively put into practical use recently.

[0003]

[Problems to be solved by the device]

 By the way, in the conventional electronic lock device, a driver's license or an IC card in which a contact type IC having a bar code or a data generating circuit is incorporated must be put in a bar code reader or a reading device having a signal transfer contact. I won't. Therefore, there is a drawback that the operation becomes complicated. Also, the driver has to put the driver's license, IC card, etc. in the reader away from the body, so the driver may forget to take the driver's license, IC card, etc. from the reader at the end of driving. . In addition, a driver's license or an IC card as a transmitter of a conventional electronic lock device usually has a built-in battery as a power source for driving a data generating circuit, which increases the weight. Further, since the battery has to be replaced due to exhaustion of the battery, there is a drawback that maintenance is complicated.

Therefore, in this invention, the license-type electronic key device is easy to operate, prevents the license from being carried around, and makes it unnecessary to use a battery in the license to reduce weight and simplify maintenance. And an electronic lock device using the same.

[0005]

[Means for achieving the object]

 In the license type electronic key device according to the present invention, a coil antenna and a signal generation integrated circuit connected to the coil antenna are provided in the license, and the signal generation integrated circuit is configured to transmit a specific variable magnetic field through the coil antenna. A power generation circuit that generates power when receiving power, a key-side storage unit that stores the transmission-side code signal, and a key that includes the transmission-side code signal of the key-side storage unit when power is supplied from the power generation circuit. And a key-side oscillator circuit that emits a side-varying magnetic field from the coil antenna to the space.

An electronic lock device according to the present invention comprises the above-mentioned license type electronic key device and an electronic lock device fixed to a support. The electronic lock device includes a coil antenna, a lock-side oscillating circuit that emits a lock-side fluctuating magnetic field from the coil antenna to the space, a receiving circuit that receives the key-side fluctuating magnetic field via the coil antenna, and demodulates the output of the receiving circuit. Then, the demodulation circuit for detecting the code signal corresponding to the transmission side, the lock side storage means for storing the reception side code signal, the code signal of the demodulation circuit and the reception side code signal of the lock side storage means are compared. And a lock control circuit that generates an output to the controlled object when these match. In the illustrated embodiment, a start switch such as an ignition switch or a push-button switch is connected to the lock control circuit, and when the start switch is turned on, the lock control circuit sends a drive signal to the lock side oscillation circuit.

In another embodiment of the electronic lock device according to the present invention, a license type electronic key device having a signal generating integrated circuit connected to a coil antenna and a coil antenna, and an electronic lock device fixed to an automobile. Consists of. The signal generation integrated circuit includes a power generation circuit that generates first or second power when receiving the first or second lock-side fluctuating magnetic field through the coil antenna, and the first and second transmission circuits. A key side storage means for storing a side code signal, and a first or first side including a first or second transmitting side code signal of the key side storage circuit when the first or second power is supplied from the power generation circuit. The key side oscillation circuit that emits the key side fluctuating magnetic field to the space from the coil antenna. The electronic lock device includes an in-door coil antenna provided in an automobile door, a first lock-side oscillating circuit that emits a first lock-side fluctuating magnetic field from the in-door coil antenna to a space near the door, and an in-door coil. A first receiving circuit that receives the first key-side fluctuating magnetic field via an antenna, and a first demodulating circuit that demodulates the output of the first receiving circuit and detects a first code signal corresponding to the transmitting side. A coil antenna in the driver's seat provided in the driver's seat of the vehicle, a second lock-side oscillating circuit for emitting a second lock-side fluctuating magnetic field from the driver's seat coil antenna to the space near the driver's seat, and A second receiving circuit for receiving the second key-side fluctuating magnetic field via the in-seat coil antenna, and a second receiving circuit for demodulating the output of the second receiving circuit and detecting a second code signal corresponding to the transmitting side. 2 demodulation circuits, the first and Lock side storage means for storing the second reception side code signal, and the first or second code signal of the first or second demodulation circuit and the first or second reception side code signal of the lock side storage means. And a lock control circuit that outputs an unlock signal or a drive signal to the door lock device or the engine starter when they match. In another embodiment shown, a door handle switch and an ignition switch are connected to the lock control circuit, and when the door handle switch or the ignition switch is turned on, the lock control circuit drives the first or second lock side oscillation circuit. Send a signal.

[0008]

[Action]

 The lock-side fluctuating magnetic field is emitted into the space from the lock-side oscillation circuit of the electronic lock device via the coil antenna, and when this coil-side fluctuating magnetic field is received by the coil antenna in the license-type electronic key device, the license-type electronic key device is received. Power is supplied from the power generation circuit in the signal generation integrated circuit to the key side oscillation circuit. At this time, the key side oscillation circuit reads the transmitting side code signal stored in the key side storing means, and emits the key side changing magnetic field including the transmitting side code signal to the space from the coil antenna in the license type electronic key device. To do. This fluctuating magnetic field on the key side is received by the receiving circuit via the coil antenna of the electronic lock device, and the received output is demodulated by the demodulating circuit to detect the code signal corresponding to the transmitting side. The detection output of the demodulation circuit is input to the lock control circuit, and the lock control circuit compares the code signal of the demodulation circuit with the reception side code signal of the lock side storage means and generates an output to the controlled object when these match. To do. Therefore, the controlled object can be controlled without contacting the driver's body without touching the driver's body, which makes the operation easy and prevents the driver from being uncarried. Also, by receiving the fluctuating magnetic field on the lock side via the coil antenna in the license type electronic key device, power is supplied from the power generation circuit to the key side oscillation circuit, so the built-in battery of the license type electronic key device is used. Since it is unnecessary, the weight can be reduced and the maintenance can be simplified.

[0009]

【Example】

 An embodiment of a license type electronic key device and an electronic lock device according to the present invention applied to a vehicle lock device will be described below with reference to FIGS. As shown in FIG. 1 (A), the license type electronic key device 10 according to the present invention is connected to a license 18, a coil antenna 11 wound around the outer periphery of the license 18, and a coil antenna 11. And the integrated circuit 19 for signal generation. A thin and small IC (integrated circuit) including a storage element (memory), a microcomputer, etc. is used as the signal generating integrated circuit 19, and is attached to the back surface of the license 18 together with the coil antenna 11. The coil antenna 11 and the signal generating integrated circuit 19 may be incorporated in the license 18. As shown in FIG. 1B, an integrated circuit 19 for signal generation generates a power when a specific fluctuating magnetic field (lock side fluctuating magnetic field in this embodiment) is received via a coil antenna 11. And a key-side memory 14 as a key-side storage means for storing a transmitter-side code signal, and a key-side variable magnetic field containing the transmitter-side code signal of the key-side memory 14 when power is supplied from the power generation circuit 12. And a key side oscillation circuit 13 for radiating from the coil antenna 11 to the space. Further, the key side oscillation circuit 13 reads out the transmission side code signal of the key side memory 14 and outputs the transmission side code signal to the modulation circuit 16 when power is supplied from the power generation circuit 12, and the transmission control circuit 15. A modulation circuit 16 that performs frequency shift keying (FSK) on a carrier wave of a constant frequency based on the transmission side code signal of the circuit 15, and the output signal of the modulation circuit 16 is emitted into the space from the coil antenna 11 to generate a fluctuating magnetic field on the key side. And a transmitting circuit 17 to be formed. Although not shown, the modulation circuit 16 has a built-in local oscillator that generates a carrier wave of a constant frequency.

An electronic lock device using the license type electronic key device 10 of FIG. 1 includes a license type electronic key device 10 and an electronic lock device 20 fixed to an automobile, as shown in FIG. . The electronic lock device 20 includes a lock-side oscillation circuit 22 that emits a sine wave signal having a constant frequency into the space from the coil antenna 21 to form a lock-side fluctuating magnetic field, and a key-side generated by the license-type electronic key device 10. A receiving circuit 23 that receives the fluctuating magnetic field via the coil antenna 21, a demodulating circuit 24 that demodulates the output of the receiving circuit 23 by frequency discrimination and detects a code signal corresponding to the transmitting side, and a receiving side code signal is stored. The code signal of the demodulation circuit 24 and the reception side code signal of the lock side memory 25 are compared with each other, and an output is generated to the controlled body 27 when these match. A lock control circuit 26 is provided. For example, the controlled object 27 is a relay that energizes a starter motor of an automobile. An ignition switch 28 provided in the driver's seat of the automobile as a start switch of the electronic lock device 20 is connected to the lock control circuit 26. When the ignition switch 28 is switched from the off state to the on state, a drive signal is sent from the lock control circuit 26 to the lock side oscillation circuit 22 to drive the lock side oscillation circuit 22.

In this embodiment, when a nonvolatile memory element such as EEPROM is used as the key memory 14 and the lock memory 25, there is an advantage that the signal stored in the EEPROM is retained even after the power is cut off. For the key side oscillation circuit 13 and the lock control circuit 26, for example, a one-chip microcomputer or the like can be used.

Next, the operation of the electronic lock device shown in FIG. 2 will be described. When the ignition switch 28 is turned on, a drive signal is sent from the lock control circuit 26 in the electronic lock device 20 to the lock side oscillation circuit 22 to drive the lock side oscillation circuit 22. As a result, the lock-side fluctuating magnetic field having a constant frequency is emitted into the space via the coil antenna 21. When the variable magnetic field on the lock side is received by the coil antenna 11 in the license type electronic key device 10, the power generation circuit 12 operates to generate power. The output waveform of the lock-side oscillator circuit 22 at this time is shown in FIG. The power generated by the power generation circuit 12 is supplied to the transmission control circuit 15, the modulation circuit 16, and the transmission circuit 17 in the key side oscillation circuit 13. At this time, the transmission control circuit 15 reads the transmission side code signal from the key side memory 14 and gives the transmission side code signal to the modulation circuit 16, and the modulation circuit 16 supplies a carrier wave of a constant frequency based on the transmission side code signal. Frequency shift keying (FSK) is performed. The modulation signal of the modulation circuit 16 is emitted by the transmission circuit 17 into the space as a fluctuating magnetic field on the key side through the coil antenna 11. FIG. 3B shows an output signal waveform of the modulation circuit 16 when the transmission side code signal is formed in the order of 0 1, 1, 0, 1 ... This key-side changing magnetic field is received by the receiving circuit 23 via the coil antenna 21 of the electronic lock device 20, and the demodulating circuit 24 performs frequency discrimination to generate a code signal corresponding to the transmitting side included in the key-side changing magnetic field. It is detected and input to the lock control circuit 26. At this time, the lock control circuit 26 reads the reception side code signal from the lock side memory 25 and compares the code signal of the demodulation circuit 24 with the reception side code signal of the lock side memory 25. When the code signal of the demodulation circuit 24 and the reception side code signal of the lock side memory 25 match, the lock control circuit 26 sends a drive signal to the starter motor (controlled body) 27.

The electronic lock device of FIG. 2 can be changed. That is, in the electronic lock device shown in FIG. 4, the internal circuit of the signal generating integrated circuit 19 in the license type electronic key device 10 shown in FIG. 1 and the circuit configuration of the electronic lock device 20 shown in FIG. It was done. Although not shown because it is substantially the same as FIG. 1, the signal generation integrated circuit 19 in the license type electronic key device 10 shown in FIG. 4 is connected to the first or second lock side via the coil antenna 11. A power generation circuit 12 for generating first or second power when receiving in a fluctuating magnetic field, a key side memory 14 for storing first and second transmission side code signals, and a first or second power generation circuit. A key-side oscillator circuit that emits a first or second key-side fluctuating magnetic field including the first or second transmitter-side code signal of the key-side memory to the space from the coil antenna 1 1 when the second power is supplied. 13 and 13. Further, the key-side oscillation circuit 13 reads out the first or second transmission-side code signal of the key-side memory 14 when the first or second power is supplied from the power generation circuit 12, and outputs the first or second transmission-side code signal. Of the transmission side code signal of the transmission control circuit 15 to the modulation circuit 16 and a frequency shift keying (FSK) of a carrier of a constant frequency based on the first or second transmission side code signal of the transmission control circuit 15. And a transmission circuit 17 that emits an output signal of the modulation circuit 16 into the space from the coil antenna 11 and forms a first or second key-side fluctuating magnetic field. Although not shown, the modulation circuit 16 has a built-in local oscillator that generates a carrier wave of a constant frequency. The electronic lock device 20 shown in FIG. 4 emits a first lock-side fluctuating magnetic field from the in-door coil antenna 21a provided on the door of the automobile and the in-door coil antenna 21a to the space near the door. The lock side oscillation circuit 22a, the first receiving circuit 23a that receives the first key side fluctuating magnetic field via the in-door coil antenna 21a, and the output of the first receiving circuit 23a are demodulated by frequency discrimination and transmitted. The first demodulation circuit 24a for detecting the first code signal corresponding to the side, the coil antenna 21b in the driver's seat provided in the driver's seat of the automobile, and the coil antenna 21b in the driver's seat in the space near the driver's seat The second lock-side oscillator circuit 22b that emits the lock-side fluctuating magnetic field, the second receiving circuit 23b that receives the second key-side fluctuating magnetic field via the in-driver coil antenna 21b, and the second A second demodulation circuit 24b for detecting the second code signal corresponding to the transmission side by demodulating the output of the reception circuit 23b by frequency discrimination, and a lock side memory 25 for storing the first and second reception side code signals. And the first or second code signal of the first or second demodulation circuit 24a, 24b and the first or second code signal of the receiving side of the lock side memory 25 are compared, and when these match, The door lock device 27a or the engine starting device 27b is provided with a lock control circuit 26 for outputting an unlock signal or a drive signal. The lock control circuit 26 is connected to a door handle switch 29 provided on the door of the vehicle and an ignition switch 28 provided on the driver's seat of the vehicle. When the door handle switch 29 or the ignition switch 28 is switched from the off state to the on state, a drive signal is sent from the lock control circuit 26 to the first or second lock side oscillation circuits 22a, 22b. The lock side oscillator circuits 22a and 22b are driven.

Next, the operation of the electronic lock device shown in FIG. 4 will be described. When the door handle switch 29 is turned on by pulling up the door handle, a drive signal is sent from the lock control circuit 26 in the electronic lock device 20 to the first lock side oscillation circuit 22a, and the first lock side oscillation is generated. The circuit 22a is driven. As a result, the first lock-side fluctuating magnetic field having a constant frequency is emitted to the space near the door via the in-door coil antenna 21a. When the first variable magnetic field on the lock side is received by the coil antenna 11 in the license type electronic key device 10, the power generation circuit 12 operates to generate the first power. The first power generated by the power generation circuit 12 is supplied to the transmission control circuit 15, the modulation circuit 16 and the transmission circuit 17 in the key side oscillation circuit 13. At this time, the transmission control circuit 15 reads the first transmission side code signal from the key side memory 14 and gives the first transmission side code signal to the modulation circuit 16, and the modulation circuit 16 receives the first transmission side code signal. The frequency shift keying (FSK) is performed on the carrier of a constant frequency based on the above. The modulation signal of the modulation circuit 16 is emitted to the space near the door via the coil antenna 11 as the first key-side fluctuating magnetic field by the transmission circuit 17. This first fluctuating magnetic field on the key side is received by the first receiving circuit 23a via the in-door coil antenna 21a of the electronic lock device 20, and frequency discrimination is performed by the first demodulating circuit 24a. The first code signal corresponding to the transmitting side included in the key side fluctuating magnetic field is detected and input to the lock control circuit 26. At this time, the lock control circuit 26 reads out the first reception side code signal from the lock side memory 25, and the first code signal of the first demodulation circuit 24a and the first reception side code of the lock side memory 25. Signal is compared with the signal. When the first code signal of the first demodulation circuit 24a and the first code signal of the receiving side of the lock memory 25 match, the lock control circuit 26 sends an unlock signal to the door lock device 27a to lock the door. Drive the actuator and unlock the door lock.

When a driver carrying the license type electronic key device 10 enters the inside of a vehicle and turns on an ignition switch 28 provided in a driver's seat, a second lock control circuit 26 in the electronic lock device 20 is operated. A drive signal is sent to the lock side oscillation circuit 22b, and the second lock side oscillation circuit 22b is driven. As a result, the second lock-side fluctuating magnetic field having a constant frequency is released into the space near the driver's seat via the coil antenna in the driver's seat 21b. The frequency of the second lock-side fluctuating magnetic field is set to a value different from the frequency of the first lock-side fluctuating magnetic field in order to avoid interference with the first lock-side fluctuating magnetic field. When the second lock-side fluctuating magnetic field is received by the coil antenna 11 in the license type electronic key device 10, the power generation circuit 12 operates to generate the second power. The second power generated by the power generation circuit 12 is supplied to the transmission control circuit 15, the modulation circuit 16, and the transmission circuit 17 in the key side oscillation circuit 13. At this time, the transmission control circuit 15 reads the second transmission side code signal from the key side memory 14 and gives the second transmission side code signal to the modulation circuit 16, and the modulation circuit 16 outputs the second transmission side code signal. Based on the above, frequency shift keying (FSK) is performed on a carrier wave having a constant frequency. The modulation signal of the modulation circuit 16 is emitted to the space near the driver's seat through the coil antenna 11 as the second key-side fluctuating magnetic field by the transmission circuit 17. This second fluctuating magnetic field on the key side is received by the second receiving circuit 23b via the coil antenna 21b in the driver's seat of the electronic lock device 20, and frequency discrimination is performed by the second demodulating circuit 24b. The second code signal corresponding to the transmission side included in the key side fluctuation magnetic field is detected and input to the lock control circuit 26. At this time, the lock control circuit 26 reads the second reception side code signal from the lock side memory 25, and outputs the second reception side code signal of the second demodulation circuit 24b and the second reception side code signal of the lock side memory 25. To compare. When the second code signal of the second demodulation circuit 24b and the second reception side code signal of the lock side memory 25 match, the lock control circuit 26 sends a drive signal to the engine starting device 27b to turn on the starter motor. To drive.

In the above-described embodiment, by using the specific fluctuating magnetic field, the license-type electronic key device 10 can be controlled without contacting the driver's body without contact, such as a door lock device or an engine starting device. Since it can be operated, it is easy to operate and it is possible to prevent non-carrying of the license. Further, when the lock side fluctuating magnetic field generated by the electronic lock device 20 is received via the coil antenna 11 of the license type electronic key device 10, power is supplied from the power generation circuit 12 to the key side oscillation circuit 13. Since the license type electronic key device does not require a built-in battery, the weight and the maintenance can be simplified. Further, since the variable magnetic field subjected to frequency shift keying is used, it has an advantage that it is not easily affected by external noise such as interfering radio waves and ignition noise. In particular, in the embodiment shown in FIG. 4, the engine starting device 27b is driven after unlocking the door locking device 27a without contact, so that the convenience can be further improved and the theft accident of the automobile can be further prevented.

The embodiment of the present invention is not limited to the above-described embodiment, and can be modified. For example, as the key side memory 14 and the lock side memory 25, a normal ROM (read only memory) or another storage element may be used instead of the nonvolatile storage element such as EEPROM. Also, the key side oscillation circuit 13 and the lock control circuit 26 can be configured as a discrete circuit. Also, instead of frequency shift keying (FSK), phase shift keying (PSK), amplitude shift keying (ASK) or other modulation schemes may be used. Further, in the circuit of FIG. 4, the door handle switch 29 is omitted, and the drive signal is applied from the lock control circuit 26 of the electronic lock device 20 to the first lock side oscillation circuit 22a at regular intervals to make the first lock. The side oscillator circuit 22a may always be driven intermittently. In this case, the code signal is automatically collated in the electronic lock device 20 and the door lock device 27a is automatically operated only when the driver carrying the license type electronic key device 10 approaches the door of the vehicle. Unlocked. Therefore, the operability of the electronic lock device can be further improved.

Further, although the invention is applied to the vehicle lock device in the above embodiment, the invention can be applied to other electronic lock devices or operation control devices other than the vehicle lock device.

[0019]

[Effect of device]

 As described above, according to the present invention, the controlled device such as the lock device or the engine starting device can be contactlessly controlled without removing the license as the electronic key device from the body. You can prevent non-carrying. Therefore, it is possible to prevent theft accident of a vehicle such as an automobile due to forgetting to get the license. In addition, the lock-side fluctuating magnetic field generated by the electronic lock device activates the power generation circuit in the license-type electronic key device to supply power to the key-side oscillation circuit, so the license-type electronic key device has a built-in battery. Can be omitted. Therefore, it is possible to reduce the weight of the license-type electronic key device and to simplify the maintenance by omitting the battery replacement work due to the exhaustion of the battery.

[Brief description of drawings]

FIG. 1 is a plan view and a block diagram of an electric circuit showing an embodiment of a license type electronic key device according to the present invention.

2 is a block diagram of an electric circuit showing an embodiment of an electronic lock device using the license type electronic key device of FIG. 1. FIG.

FIG. 3 is a waveform diagram showing each output signal of the lock side oscillation circuit and the modulation circuit.

FIG. 4 is a block diagram of an electric circuit showing another embodiment of the electronic lock device of FIG.

[Explanation of symbols]

10. ． ． 11. License type electronic key device, 11. ． ． Coil antenna, 12. ． ． Power generation circuit, 13. ． ． Key side oscillator circuit, 14. ． ． Key side memory (key side storage means),
18. ． ． License, 19. ． ． Integrated circuit for signal generation, 2
0. ． ． Electronic lock device, 21. ． ． Coil antenna,
22. ． ． Lock side oscillation circuit, 23. ． ． Receiver circuit, 2
4. ． ． Demodulation circuit, 25. ． ． Lock side memory (lock side storage means), 26. ． ． Lock control circuit, 27. ． ．
Controlled object

Claims (5)

[Scope of utility model registration request] 1. A coil antenna and a signal generation integrated circuit connected to the coil antenna are provided in a license, and the signal generation integrated circuit receives power when a specific fluctuating magnetic field is received via the coil antenna. A power generating circuit for generating a power source, a key side storing means for storing a transmitting side code signal, and a coil side magnetic field for a key side including a transmitting side code signal of the key side storing means when power is supplied from the power generating circuit. A license-type electronic key device, comprising: 2. A license type electronic key device according to claim 1, and an electronic lock device fixed to a support, wherein the electronic lock device is a coil antenna and a lock side fluctuation in space from the coil antenna. A lock side oscillation circuit that emits a magnetic field, a reception circuit that receives a key side fluctuation magnetic field via a coil antenna, a demodulation circuit that demodulates the output of the reception circuit and detects a code signal corresponding to the transmission side, and a reception side. A lock side storage means for storing the code signal, and a lock control circuit for comparing the code signal of the demodulation circuit with the reception side code signal of the lock side storage means and generating an output to the controlled object when these match. An electronic lock device characterized by being provided. 3. The electronic lock device according to claim 2, wherein a start switch is connected to the lock control circuit, and the lock control circuit sends a drive signal to the lock side oscillation circuit when the start switch is turned on. 4. A license type electronic key device having a coil antenna and a signal generating integrated circuit connected to the coil antenna, and an electronic lock device fixed to an automobile, wherein the signal generating integrated circuit is a coil antenna. Power generation circuit for generating the first or second power when receiving the first or second lock-side fluctuating magnetic field through the key, and the key-side storage for storing the first and second transmission-side code signals And a first or second key-side fluctuating magnetic field including the first or second transmitting-side code signal of the key-side storage means when the first or second power is supplied from the power generating circuit to the coil antenna. The electronic lock device includes a door-side coil antenna provided in a door of a vehicle and a first lock-side fluctuating magnetic field from the door-coil antenna to a space near the door. Outputs the first lock side oscillation circuit, the first reception circuit which receives the first key side fluctuating magnetic field via the in-door coil antenna, and demodulates the output of the first reception circuit to correspond to the transmission side The first demodulation circuit for detecting the first code signal, the coil antenna in the driver's seat provided in the driver's seat of the automobile, and the second lock-side fluctuating magnetic field in the space near the driver's seat from the coil antenna in the driver's seat A second lock side oscillating circuit that emits a signal, a second receiving circuit that receives the second key side fluctuating magnetic field via the coil antenna in the driver's seat, and a transmitting side by demodulating the output of the second receiving circuit. A second demodulation circuit for detecting a second code signal corresponding to, a lock side storage means for storing the first and second reception side code signals, and a first or second demodulation circuit for the first or second demodulation circuit. Two
Of the lock signal and the first or second reception-side code signal of the lock-side storage means are compared, and when they match, a lock control circuit that outputs an unlock signal or a drive signal to the door lock device or the engine starter device An electronic lock device comprising: 5. A door handle switch and an ignition switch are connected to the lock control circuit, and when the door handle switch or the ignition switch is turned on, the lock control circuit sends a drive signal to the first or second lock side oscillation circuit. The electronic lock device according to claim 4.