JPH076435U - Operation control device - Google Patents

Abstract

(57) [Summary] [Object] The present invention accurately transmits and receives a remote control signal between a key and a lock device that constitute an operation control device. A lock device 11, a key 13 for mechanically unlocking the lock device 11, a first resonance circuit 14 fixed to a key head 13c of the key 13 and comprising a series circuit of a capacitor 15 and a coil 16; Oscillation circuit 22 attached to lock device 11 and including capacitor 15 and coil 16, second resonance circuit 24 attached to lock device 11 and including capacitor 15 and coil 16, oscillation circuit 22 and second resonance circuit An operation control circuit 20 connected to 24 and a controlled body 21 that is driven by the output of the operation control circuit 20 and unlocks or locks the lock 11 device are provided. The first resonance circuit 14 is smaller than the second resonance circuit 24, and when the key 13 is inserted into the key insertion hole 17 of the lock device 11, the first resonance circuit 14 is substantially the same in the insertion direction of the key 13. Since it is arranged inside the second resonance circuit 24 in a plane, strong magnetic coupling is obtained.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lock device, and more particularly, to an operation control device that combines a mechanical lock device and an electronic lock 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, in the vehicle key device disclosed in the above publication, when the key is inserted into the key hole, the annular core and the shaft-shaped core are in contact with each other at two positions to form a set of magnetic circuits. Since there are two parts, even if the rotation angle of the key is slightly deviated, the magnetic coupling force is weakened and it is difficult to accurately discriminate the signal from the key side on the lock side.

Therefore, an object of the present invention is to provide an operation control device that enables accurate transmission / reception of a remote operation signal between a key and a lock device.

[0007]

[Means for Solving the Problems]

 An operation control device according to the present invention comprises a lock device, a key for mechanically unlocking the lock device, a first coil wound around a key blade of the key and fixed to a key head, and comprising a series circuit of a capacitor and a coil. Resonance circuit, an oscillation circuit that is attached around the key insertion hole of the lock device and includes a coil, a second resonance circuit that is attached to the lock device and includes a coil, and is connected to the oscillation circuit and the second resonance circuit. It is equipped with a controlled operation circuit. The operation control circuit drives the oscillation circuit at a plurality of different frequencies, and when the oscillation circuit is driven at a specific frequency and the first resonant circuit resonates with the specific frequency, the second resonant circuit causes the first resonant circuit to resonate. The resonance of the circuit is detected, so that the operation control circuit sends a drive signal to the controlled object. The first resonance circuit is smaller than the second resonance circuit, and when the key is inserted into the key insertion hole of the lock device, the first resonance circuit causes the second resonance circuit to be substantially flush with the insertion direction of the key. It is placed inside the circuit.

[0008]

[Action]

 The first resonance circuit is smaller than the second resonance circuit, and when the key is inserted into the key insertion hole of the lock device, the first resonance circuit is substantially flush with the key insertion direction in the second direction. Being located inside the resonant circuit, a strong magnetic coupling is obtained. In addition, the lock device can be unlocked mechanically by inserting the key into the lock device and rotating it.

[0009]

【Example】

 An embodiment of an operation control device according to the present invention applied to a vehicle steering lock device will be described below with reference to FIGS.

As shown in FIGS. 1 to 3, an operation control device 10 according to the present invention mechanically operates a steering lock device 11, a transmission / reception circuit 12 attached to the steering lock device 11, and a steering lock device 11. And a key 13 for locking or unlocking. The key 13 includes a key blade 13b having a notch 13a for giving a key code, a key head 13c formed at an end of the key blade 13b, and a first resonance circuit 14 fixed to the key head 13c. ing. The first resonance circuit 14 is a coil-capacitor circuit in which a capacitor 15 and a coil 16 are connected in series. The first resonance circuit 14 is housed in a resin key head 13c, and as shown in the figure, the coil 16 of the first resonance circuit 14 is wound around the inner end of the key blade 13b. The first resonant circuit 14 resonates when receiving a remote control signal having a constant frequency due to the combination with the capacitor 15 and the coil 16.

FIG. 3 is a block diagram showing an electric circuit of the operation control device of the present invention. The lock device 10 is provided with an operation control circuit 20, and terminals of the operation control circuit 20 are connected to a 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 22a, and the oscillation circuit 22 is driven by the output of the operation control circuit 20. The transmission / reception circuit 12 also includes a second resonance circuit 24 including a coil 24 a, an amplifier filter circuit 25 that amplifies and filters the output of the second resonance circuit 24, and a detection circuit 26 that detects the output of the amplifier filter circuit 25. And a comparator circuit 27 for detecting whether or not the output signal of the detection circuit 26 is within a predetermined frequency and applying the detection signal to the operation control circuit 20 when the output of the detection circuit 26 is within a predetermined frequency range. It has and.

As shown in FIG. 1, the first resonance circuit 14 wound around the key blade 13 b of the key 13 is smaller than the second resonance circuit 24 attached to the entrance of the steering lock device 11. When the key 13 is inserted into the key insertion hole 17 of the steering lock device 11, the first resonance circuit 14 causes the second resonance on the substantially same plane perpendicular to the insertion direction of the key 13 as shown in FIG. It is arranged inside the circuit 24. Therefore, the same magnetic coupling force can be obtained between the first resonance circuit 14 and the second resonance circuit 24 at any rotation angle of the key.

In the above structure, when the key 13 is inserted into the steering lock device 11 and rotated, the steering lock device 11 is mechanically unlocked. Further, when the key 13 is rotated to the start position, a drive signal is given from the operation control circuit 20 to the oscillation circuit 22, and the oscillation circuit 22 intermittently outputs outputs of different frequencies f1 to f20. At this time, when the first resonance circuit 14 resonates at the frequency f2, the first resonance circuit 14 resonates when the oscillation circuit 22 generates a signal of the frequency f2. At the time of resonance, the first resonance circuit 14 is connected to the second resonance circuit 24 by electromagnetic induction and resonates.

The output of the second resonance circuit 24 is applied to the detection circuit 26 through the amplifier filter circuit 25, and the output of the detection circuit 26 rises above a certain level. The output of the detection circuit 26 is sent to the comparison circuit 27, which gives the operation control circuit 20 a detection signal corresponding to the frequency f2. As a result, the operation control circuit 20 gives an unlocking signal to the controlled body 21 and operates the controlled body 21. For example, the controlled object 21 is a relay that energizes the starter motor.

The embodiment of the present invention is not limited to the above-mentioned embodiment, but can be modified. For example, in the above-described embodiment, the oscillation circuit 22 and the second resonance circuit 24 of the transmission / reception circuit 12 are configured by separate circuits, but the oscillation circuit 22 and the second resonance circuit are formed by the same coil-capacitor circuit. One can be used in common. In this case, after the operation control circuit 20 gives an output to the transmission / reception circuit 12 to drive the coil-capacitor to oscillate as an oscillation circuit, the operation control circuit 20 is switched to set the coil-capacitor to the second resonance. It can also be used as a circuit.

Further, the oscillation circuit 22 is configured to intermittently output, for example, 22 different frequencies by the output of the operation control circuit, but the frequency that continuously changes by the output of the operation control circuit 20. May be generated from the oscillation circuit 22.

As shown in FIG. 4, the first resonance circuit 14 may be wound around a bobbin 30 having a pair of flanges 31 and 32, and the bobbin 30 may be attached to the key blade 13b.

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 it is obvious that the invention can be applied to a lock device or an operation control device other than the steering lock device.

[0019]

[Effect of device]

 In the present invention, since the first resonance circuit is arranged inside the second resonance circuit on the substantially same plane with respect to the insertion direction of the key, the first resonance circuit is arranged inside the second resonance circuit. The same magnetic coupling force is obtained between the first resonance circuit and the second resonance circuit. Therefore, even if the rotation angle of the key in the lock device is slightly deviated, the same magnetic coupling force can be maintained, so that the remote operation signal can be accurately transmitted and received between the key and the lock device.

[Brief description of drawings]

FIG. 1 is a sectional view of an operation control device according to the present invention applied to a steering lock device.

FIG. 2 is a sectional view showing a state in which a key is inserted in the steering lock device.

FIG. 3 is a block diagram showing an electric circuit used in the operation control device of the present invention.

FIG. 4 is a perspective view of a bobbin.

[Explanation of symbols]

10. ． Locking device, 11. ． Steering lock device, 12. ． Transmitter / receiver circuit, 13. ． Key, 14. ． First
Resonance circuit of 15. ． Capacitors, 16, 24a. ． Coil, 20. ． Operation control circuit, 21. ． Controlled object, 2
2. ． Oscillator circuit, 24. ． Second resonance circuit, 25. ．
Amplifier filter circuit, 26. ． Detection circuit, 27. ． Comparison circuit

Claims (1)

[Scope of utility model registration request] 1. A lock device, a key for mechanically unlocking the lock device, a first resonant circuit wound around a key blade of the key and fixed to the key head, and comprising a series circuit of a capacitor and a coil. An oscillation circuit mounted around the key insertion hole of the lock device and including a coil, a second resonance circuit mounted on the lock device and including the coil, and an operation control circuit connected to the oscillation circuit and the second resonance circuit. The operation control circuit drives the oscillator circuit at a plurality of different frequencies, the oscillator circuit is driven at a specific frequency, and when the first resonant circuit resonates with the specific frequency, the second resonant circuit is The resonance of the first resonance circuit is detected, whereby the operation control circuit sends a drive signal to the controlled object, the first resonance circuit is smaller than the second resonance circuit, and the key is inserted into the key insertion hole of the lock device. When the is inserted, the first resonance circuit is arranged inside the second resonance circuit on substantially the same plane with respect to the insertion direction of the key.