JPH076434U - Electromagnetic induction type ignition lock device - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the power consumption of the electromagnetic induction ignition lock device. An electromagnetic induction type steering ignition lock device according to the present invention includes an oscillation circuit 22 that can be mechanically unlocked and that is oscillated at different frequencies to generate an electromagnetic field. When the oscillation circuit 22 oscillates at a specific frequency, The key 31 having the resonance circuit 14 that resonates with is combined. When the key 31 is inserted or the key 31 is rotated, the ignition switch 26 is turned on to activate the oscillation circuit 22 and start detecting the oscillation operation of the oscillation circuit 22.
Since the oscillation circuit 22 is held in a stopped state until the ignition switch 26 is turned on, it is possible to save electric power when not in use, operate the oscillation circuit 22 at a timely timing when using, and start the oscillation operation of the oscillation circuit 22. You can

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a locking device, and more particularly to an electromagnetic induction type ignition locking device which combines a mechanical locking device and an electronic locking device using a remote control signal.

[0002]

[Prior art]

 For example, as disclosed in Japanese Examined Patent Publication No. 4-15141, a vehicle key device in which a key coil provided in a key and a rotor coil provided in a lock are magnetically coupled is known. This key device includes an annular core arranged around a key insertion hole of a vehicle lock. A rotor coil is wound around the annular core, and an information detecting signal is supplied to the rotor coil by the signal generating means. The signal transmitted to the rotor coil is detected by the signal detecting means. The control means fetches the output signal of the signal detection means, compares the information based on this output signal with the determination information, and outputs the engine drive permission signal to the engine drive section only when the contents of both match. The key that can be inserted into the key insertion hole of the lock has a shaft core that is close to the annular core at two points to form a magnetic circuit when the key is inserted, and a rotor coil and a magnetic coil that are wound around the shaft core when the key is inserted. It has a key coil to be coupled and an information generating means for generating a signal containing specific information from the key coil in response to the signal induced in the key coil.

When the key is inserted into the key insertion hole of the lock and the axial core is brought close to the annular core to form a set of magnetic circuits, the signal from the signal generating means is transmitted to the key coil via the rotor coil. Induced. When the information generating means responds to this signal, a signal containing specific information is generated from the key coil. When this signal is induced in the rotor coil, this signal is detected by the signal detection means and supplied to the control means. The control means compares the information based on the output signal of the signal detection means with the determination information, and outputs the engine drive permission signal to the engine drive section only when the contents of the two match.

In this vehicle key device, information for driving the engine is exchanged by magnetically coupling the lock-side annular core and the key-side shaft-shaped core, and the information from the key side is transferred to the lock-side. Since the engine can be driven only when the information matches the information, the ring core and the axial core do not have to detect the information due to dust adhesion or read the wrong information by operating the keys. The engine can be reliably driven by magnetic coupling with.

[0005]

[Problems to be solved by the device]

 By the way, the vehicle key device disclosed in the above publication has a drawback that power consumption increases because it is always operated.

Therefore, an object of the present invention is to provide an electromagnetic induction type ignition lock device capable of energizing an oscillation circuit at an optimum timing and starting detection of oscillation of the oscillation circuit to reduce power consumption.

[0007]

[Means for Solving the Problems]

 The electromagnetic induction type ignition lock device according to the present invention includes an oscillation circuit that can be mechanically unlocked and that is oscillated at different frequencies to generate an electromagnetic field. Further, the key is provided with a resonance circuit that resonates when the oscillation circuit oscillates at a specific frequency. When the key is inserted or the key is rotated, the trigger switch is turned on to activate the oscillation circuit and start detecting the oscillation operation of the oscillation circuit.

[0008]

[Action]

 The oscillation circuit is held in a stopped state until the trigger switch is turned on, so power can be saved when not in use, and when in use, the oscillation circuit can be energized with good timing and the oscillation operation of the oscillation circuit can be started. it can.

[0009]

【Example】

 An embodiment of a steering ignition lock device according to the present invention applied to a steering lock device for an automobile will be described below with reference to FIGS.

As shown in FIGS. 1 and 2, a steering lock device 10 according to the present invention includes a frame 11 and a key rotatably disposed in a frame 11 for mechanically unlocking the steering lock device 10. It has a cylinder 17 and a bracket 19 which is attached to the frame 11 by means of screws 18. The coil antenna 23 is arranged on the annular portion 19 a of the bracket 19.

The key 31 shown in FIG. 1 includes a key blade 32 inserted into the key cylinder 17, and a key head 33 made of resin. A substrate 34 is arranged on the key head 33, and a resonance circuit 14 which is composed of a capacitor 15 and a coil antenna 16 and resonates at a specific frequency is arranged on the substrate 34. The coil antenna 23 attached to the annular portion 19a of the bracket 19 has a central axis 35 directed to the resonance circuit 14 attached to the key 31.

FIG. 3 is a block diagram showing an electric circuit of the steering lock device of the present invention. The lock device 10 is provided with a transmission / reception control circuit 20, and an output terminal of the transmission / reception control circuit 20 is connected to the transmission / reception circuit 12 and a controlled body 21 such as a relay for driving a starter motor of an automobile. The transmission / reception circuit 12 has an oscillation circuit 22 including a coil antenna 23, and the oscillation circuit 22 is controlled by the output of the transmission / reception control circuit 20. Further, the transmission / reception circuit 12 detects whether or not the output of the oscillation circuit 22 is within a predetermined frequency, and generates a detection signal when the output is within a predetermined frequency range. An amplifier circuit 25 that amplifies the output and gives the amplified detection signal to the transmission / reception control circuit 20. Also, an ignition switch 26 is connected to the transmission / reception control circuit 20 as a trigger switch. When the ignition switch 26 is switched from the off position to the ACC position, a high level input signal is applied from the power supply to the transmission / reception control circuit 20.

The operation of the electric circuit shown in FIG. 3 will be described below with reference to the flowchart shown in FIG.

When the key 12 is inserted into the steering lock device 10 and rotated, the steering lock device 10 is mechanically unlocked. At this time, when the key 31 is rotated from the OFF position to the AC C position, power is supplied to the transmission / reception control circuit 20 through the ignition switch 26 and is energized. In FIG. 4, the process proceeds from steps 40 and 41 to 42, a control signal is applied from the transmission / reception control circuit 20 to the oscillation circuit 22, and the oscillation circuit 22 in the inoperative state is activated (step 42). The oscillator circuit 22 continuously generates outputs of different frequencies through the coil antenna 23. At this time, when the resonance circuit 14 resonates at a specific frequency, the resonance circuit 14 resonates when the oscillation circuit 22 generates a signal of a specific frequency. Since the resonance circuit 14 is connected to the oscillation circuit 22 by electromagnetic induction at the time of resonance and absorbs energy, the oscillation circuit 22 causes load fluctuation (step 43). The output of the oscillation circuit 22 is given to the amplification circuit 25 through the detection circuit 24, and the output of the amplification circuit 25 rises above a certain level. The output of the amplifier circuit 25 is sent to the transmission / reception control circuit 20.

Although not shown in detail, a load fluctuation value (frequency band, threshold value or predetermined pulse number) is set in advance in the transmission / reception control circuit 20 (step 44), and a predetermined registered value is stored in the storage means. And comparison means are provided. With such a configuration, the transmission / reception control circuit 20 compares the signal received through the detection circuit 24 and the amplification circuit 25 with the registered value stored in the storage means (step 45). The amplifier circuit 25 compares the output of the detection circuit 26 with a constant level and applies a binarized signal to the transmission / reception control circuit 20 so that the transmission / reception control circuit 20 can detect it. The transmission / reception control circuit 20 determines a match or a mismatch depending on whether or not this binarized signal is given when a specific frequency is generated (step 46). When the received signal and the registered value match, the transmission / reception control circuit 20 sends a match signal to the controlled object 21 (step 47) and activates the starter relay (step 48). When the key 31 is at the ACC position or the ON position of the ignition switch 26, the transmission / reception control circuit 20 always detects the resonance operation of the key 31 with the resonance circuit 14 through the transmission / reception control circuit 12. After that, when the key 33 is switched from the ACC position to the off position, the power supply to the transmission / reception control circuit 20 is stopped and the operation of the transmission / reception circuit 12 is stopped (step 51).

In step 43 of FIG. 4, when the load fluctuation does not occur in the oscillation circuit 22 or the received signal does not match the registered value in step 46, the process proceeds to step 49, and the timer means in the transmission / reception control circuit 20 is The function of the transmission / reception control circuit 20 is stopped until it is activated and the timer means counts a certain time. This is to prevent the theft of the vehicle. In step 50, the transmission / reception control circuit 20 determines whether or not the timer means has elapsed a certain time, returns to step 49 before the elapse of the certain time, and proceeds to step 51 after the elapse of the certain time.

As described above, the steering lock device 10 can be electrically unlocked via the remote control signal by the electromagnetic inductive coupling between the resonance circuit 14 and the oscillation circuit 22 of the steering lock device 10. Since the central axis 35 of the coil antenna 23 fixed to the steering lock device 10 is directed to the resonance circuit 14 of the key 31, electromagnetic conversion is efficiently performed between the coil antenna 23 of the steering lock device 10 and the coil antenna 16 of the key 31. It can be carried out.

The embodiment of the present invention is not limited to the above-mentioned embodiment, and can be modified. For example, in the above-described embodiment, an example in which the invention is applied to a steering lock device attached to an automobile is shown, but the invention can be applied to an electromagnetic induction type ignition lock device other than the steering lock device.

As the trigger switch, one that supplies electric power to the transmission / reception control circuit 20 when the ignition switch 26 is rotated to the on position or the start position, and that the key 31 is inserted into the steering ring lock device 10 is used. It is possible to use a switch etc. to detect.

[0020]

[Effect of device]

 This device can save power when not in use, and can activate the oscillation circuit and start the oscillation operation of the oscillation circuit in good timing when it is used, thus reducing the power consumption of the battery and ensuring the ignition lock device. There is an advantage that it can be operated.

[Brief description of drawings]

FIG. 1 is a sectional view of an electromagnetic induction type ignition lock device according to the present invention applied to a steering lock device.

2 is a front view of FIG.

FIG. 3 is a block diagram showing an electric circuit used in the electromagnetic induction type steering lock device of the present invention.

4 is a flowchart showing an operation sequence of the electric circuit diagram shown in FIG.

[Explanation of symbols]

10 ,. ． Steering lock device, 11. ． Frame, 12. ． Transmitter / receiver circuit, 14. ． Resonant circuit, 15. ．
Capacitors, 16, 23. ． Coil antenna, 17. ．
Key cylinder, 19. ． Bracket, 20. ． Transmission / reception control circuit, 21. ． Actuator, 22. ． Oscillator circuit,
23. ． Coil antenna, 31. ． Key, 35. ． Central axis

Claims (1)

[Scope of utility model registration request] 1. A key provided with an oscillation circuit that can be mechanically unlocked and that oscillates at different frequencies to generate an electromagnetic field, and that has a resonance circuit that resonates when the oscillation circuit oscillates at a specific frequency. In the combined electromagnetic induction type ignition lock device, a trigger switch that is turned on when the key is inserted or the key is rotated is provided, and when the trigger switch is turned on, the oscillation circuit is activated and the detection of the oscillation operation of the oscillation circuit is started. Characteristic electromagnetic induction type ignition lock device.