JP3128093B2 - Operation control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device, and more particularly to an operation control device combining a mechanical lock device and an electronic lock device using a remote control signal.

[0002]

2. Description of the Related Art As shown in, for example, Japanese Patent Publication No. 4-15141, a vehicular key device is known in which a key coil provided on a key and a rotor coil provided on a lock are magnetically coupled. The key device has an annular core disposed around a key insertion hole of a vehicle lock. A rotor coil is wound around the annular core, and an information detection signal is supplied to the rotor coil by a signal generating unit. The signal transmitted to the rotor coil is detected by the signal detecting means. The control means takes in the output signal of the signal detection means, compares the information based on the output signal with the determination information, and outputs an engine drive permission signal to the engine drive unit only when the contents of the two match. The key formed so as to be inserted into the key insertion hole of the lock has a shaft core which is close to the annular core at two places to form a magnetic circuit when the key is inserted, and a rotor coil which is wound around the shaft core and magnetically rotates when the key is inserted. It has a key coil to be coupled and information generating means for generating a signal including specific information from the key coil in response to a signal induced in the key coil.

When a key is inserted into a key insertion hole of a lock and a shaft-shaped core is brought close to an annular core to form a set of magnetic circuits, a signal from a signal generating means is induced in the key coil via a rotor coil. Is done. When the information generating means responds to this signal, a signal including 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 information for determination, and outputs an 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 transmitted and received by magnetic coupling between the lock-side annular core and the key-side shaft core, and information from the key side is transmitted to the lock-side. Since the engine can be driven only when the information matches the information in the above, the information can not be detected due to the adhesion of dust, or the wrong information is read by operating the key, The engine can be reliably driven by the magnetic coupling of the engine.

[0005]

However, the vehicular key device disclosed in the above publication has a drawback in that the device becomes large because an annular core is used for both the key and the lock. Further, in the remote control of the electromagnetic coupling method, since a signal transmission distance is short, a desired magnetic coupling cannot be obtained unless the axial core provided on the key is sufficiently close to the annular core of the lock. However, the longest effective working range of the axial core of the key relative to the annular core of the lock is limited to 1 mm to 10 mm. However, in actual key operation, it is desirable to transmit and receive a remote operation signal in a state where the key and the lock are separated by 3 to 4 cm or more.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an operation control device capable of transmitting and receiving a remote operation signal between a key and a lock device that are sufficiently separated from each other and having a simple structure.

[0007]

An operation control device according to the present invention comprises a lock device (10), a key (13) for mechanically unlocking the lock device (10), and a key head (13) for the key (13). A first resonance circuit (14) fixed to 13c) and comprising a series circuit of a capacitor (15) and a coil antenna (16); and a lock device (10).
An oscillation circuit (22) attached to the locking device (10) and including a coil antenna (24a); a second resonance circuit (24) including a coil antenna (24a) attached to the locking device (10); And an operation control circuit (20) connected to the second resonance circuit (24). The operation control circuit (20) drives the oscillation circuit (22) at a plurality of different frequencies, the oscillation circuit (22) is driven at a specific frequency, and the first resonance circuit (14) resonates with the specific frequency. Sometimes the second resonance circuit (24) is the first resonance circuit
The resonance of (14) is detected, whereby the operation control circuit (20) sends a drive signal to the controlled object (21). Oscillator circuit (22) and second
The resonance circuit (24) is composed of an individual coil antenna-capacitor circuit.

[0008] The first resonance circuit (14) includes a coil antenna (16) and a capacitor (15) formed on a sheet (17),
The sheet (17) is fixed to the key head (13c) by an adhesive (18) attached to the back surface.

In the illustrated embodiment, the lock device (10) is a steering lock device (11) mounted on an automobile, and the key (13) inserted into the keyhole of the steering lock device (11) is moved to the start position. When rotated, the operation control circuit (2
From 0), a drive signal is applied to the oscillation circuit (22) and the second resonance circuit (24), and the frequency of the first resonance circuit (14) is detected.
When the oscillation circuit (22) is driven at a specific frequency and the first resonance circuit (14) does not resonate at the specific frequency, the function of the operation control circuit (20) is stopped for a certain time.

[0010]

The first resonance circuit (14), the oscillation circuit (22) and the second resonance circuit (24) of the lock device (10) include a capacitor (15) and a coil antenna (16, 22a, 24a), Since the core is not used, the structures of the key (13) and the lock device (10) can be simplified. The locking device (10) can be mechanically unlocked by inserting and rotating the key (13) into the locking device (10). In addition, by the electromagnetic induction coupling between the first resonance circuit (14) and the second resonance circuit (24) of the lock device (10), resonance at a predetermined frequency is detected by the second resonance circuit (24). The lock device (10) can be electrically unlocked via a remote control signal. The first resonance circuit (14) and the second of the lock device (10)
Lock device (10) by electromagnetic induction coupling with the resonance circuit (24)
The lock device (10) can be electrically unlocked by the key (13) from a position sufficiently separated from the lock device.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an operation control 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 FIG. 1, an operation control device according to the present invention includes a steering lock device 11, a transmission / reception circuit 12 attached to the steering lock device 11,
A key 13 for mechanically locking or unlocking the steering lock device 11; The key 13 includes a key blade 13b having a notch 13a for giving a key code,
Key head 13 formed at the end of key blade 13b
c and the first resonance circuit 1 fixed to the key head 13c
4 is provided. The first resonance circuit 14 includes the capacitor 1
5 is a coil antenna-capacitor circuit in which the coil antenna 5 and the coil antenna 16 are connected in series. As shown in FIG. 2, the first resonance circuit 14 is printed and wired on one surface of the sheet 17,
The back surface of the sheet 17 is covered with a key head 13 c by an adhesive 18.
Affixed to The first resonance circuit 14 resonates when a remote operation signal having a certain frequency is received by a combination of the capacitor 15 and the coil antenna 16. The first resonance circuit 14 is accommodated in a case 19 made of resin.

FIG. 3 is a block diagram showing an electric circuit of the operation control device according to the present invention. Steering lock device 11
Is provided with an operation control circuit 20, and the 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 antenna 22a, and the oscillation circuit 22 is driven by an output of the operation control circuit 20. Further, the transmitting / receiving circuit 12 includes a coil antenna 24a.
A second resonance circuit 24 including: an amplifier filter circuit 25 that amplifies and filters the output of the second resonance circuit 24; a detection circuit 26 that detects the output of the amplifier filter circuit 25;
A comparison circuit 27 for detecting whether an output signal of the detection circuit 26 is within a predetermined frequency and applying a detection signal to the operation control circuit 20 when the output of the detection circuit 26 is within a predetermined frequency range. I have.

In the above configuration, when the key 13 is inserted into the keyhole of the steering lock device 11 and rotated, the steering lock device 11 is unlocked mechanically. Furthermore,
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 the different frequencies f _{1 to} f ₂₀ as shown in the time chart of FIG. 4A. appear. At this time, as shown in Figure 4B, if the first resonant circuit 14 resonates at a frequency f _2, when the oscillation circuit 22 generates a signal of frequency f _2, the first resonant circuit 14 resonates. At the time of resonance, the first resonance circuit 14 is connected to the second resonance circuit 24 by electromagnetic induction, and resonates as shown in FIG. 4C. 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 as shown in FIG. 4D. Detection circuit 2
The output of 6 is sent to the comparator circuit 27, comparator circuit 27 imparts a detection signal shown in FIG. 4E correspond to the frequency f ₂ to the operation control circuit 20. Thereby, the operation control circuit 20 gives an unlocking signal to the controlled object 21 to operate the controlled object 21. For example, the controlled body 21 is a relay for energizing a starter motor.

In this embodiment, since the electromagnetic resonance coupling between the first resonance circuit 14 and the second resonance circuit 24 is used, the key 1
3 even if the first resonance circuit 14 and the transmission / reception circuit 12 are separated from each other by 2 cm to 10 cm, the resonance of the first resonance circuit 14 is effectively received by the second resonance circuit 24 and the controlled object 21 Can be operated.

FIG. 5 is a flowchart showing an operation sequence of the operation control circuit 20. Proceeding from step 30 to 31, the operation control circuit 20 drives the oscillation circuit 22 at the frequency f _n = f ₁ as shown in FIG. 4A. Then step 3
In 2, it is determined whether the first resonance circuit 14 has resonated. When the first resonance circuit 14 resonates, step 33
The process proceeds to step 34 to store the frequency number 1 of frequency f ₁ in. In step 32, the first resonance circuit 14
If does not resonate, the process proceeds directly to step 34. The resonance of the first resonance circuit 14 is detected by the second resonance circuit 24. In step 34, it is determined whether or not the frequency number n has been repeated up to n = 20. When n is not repeated until n = 20, in step 39, the operation control circuit 20 drives the oscillation circuit 22 at the frequency f _{n + 1} = f ₂ as shown in FIG. 4A, and then returns to step 32.

When the operation is repeated up to the frequency number 20 in step 34, the operation control circuit 20
Then, the resonance frequency number is compared with the stored predetermined frequency number. Then, the process proceeds to a step 36, wherein it is determined whether or not only the selected one or a plurality of predetermined numbers of frequencies resonate. When only a predetermined frequency such as f _n = f ₂ resonates, an output is sent from the operation control circuit 20 to the controlled object 21 in step 37, and the starter motor is driven, so that the engine can be started. . Thereafter, in step 38, all the stored frequency numbers are deleted, and the process proceeds to step 41. When only the frequency of the predetermined number does not resonate in step 36, after the function of the operation control circuit 20 is stopped for a certain time in step 40,
Proceed to step 38.

The embodiment of the present invention is not limited to the above embodiment, but can be modified. For example, the first resonance circuit 14 including the coil antenna and the capacitor formed on the sheet 17 is fixed to the key head 13c by the adhesive 18 adhered to the back surface of the sheet 17, but the key head 13c
, A plurality of resonance circuits may be fixed. In the above-described embodiment, an example in which the present invention is applied to a steering lock device mounted on an automobile is shown. However, it is apparent that the present invention can be applied to a lock device or an operation control device other than the steering lock device.

[0019]

The present invention provides a coil antenna having no core.
Since the electromagnetic induction coupling is performed by the capacitor circuit, the structure of the device can be simplified and downsized, and the remote control distance can be extended.

[Brief description of the drawings]

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

FIG. 2 is a sectional view of the key head shown in FIG. 1;

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

FIG. 4 is a time chart showing output signals of respective circuits in FIG. 2;

FIG. 5 is a flowchart showing an operation sequence of the operation control circuit.

[Explanation of symbols]

10. . Locking device, 11. . 11. steering lock device; . 12. transmitting and receiving circuits; . Key, one
4. . 14. a first resonance circuit; . Capacitor, 16,
22a, 24a. . Coil antenna, 17. . Sheet, 18. . Adhesive, 20. . Operation control circuit, 2
1. . Controlled object, 22. . Oscillation circuit, 24. . Second
25. a resonance circuit of . Amplifier filter circuit, 2
6. . Detection circuit, 27. . Comparison circuit,

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E05B 65/20 E05B 49/00

Claims (4)

(57) [Claims] 1. A lock device, a key for mechanically unlocking the lock device, a first resonance circuit fixed to a key head of the key and comprising a series circuit of a capacitor and a coil antenna, and attached to the lock device. And an oscillation circuit including a coil antenna; a second resonance circuit attached to the lock device and including the coil antenna; and an operation control circuit connected to the oscillation circuit and the second resonance circuit. When the oscillation circuit is driven at a specific frequency and the first resonance circuit resonates with the specific frequency, the second resonance circuit detects the resonance of the first resonance circuit. Thereby, the operation control circuit sends a drive signal to the controlled object, and the oscillation circuit and the second resonance circuit are constituted by separate coil antenna-capacitor circuits. That operation control device. 2. The operation control device according to claim 1, wherein the first resonance circuit includes a coil antenna and a capacitor formed on the sheet, and is fixed to the key head by an adhesive stuck to a back surface of the sheet. . 3. A lock device, a key for mechanically unlocking the lock device, a first resonance circuit fixed to a key head of the key and comprising a series circuit of a capacitor and a coil antenna, and attached to the lock device. And an oscillation circuit including a coil antenna; a second resonance circuit attached to the lock device and including the coil antenna; and an operation control circuit connected to the oscillation circuit and the second resonance circuit. When the oscillation circuit is driven at a specific frequency and the first resonance circuit resonates with the specific frequency, the second resonance circuit detects the resonance of the first resonance circuit. Thereby, the operation control circuit sends a drive signal to the controlled object, and the lock device is a steering lock device attached to the automobile, and the steering lock device When the key inserted into the hole is rotated to the start position, a drive signal is applied from the operation control circuit to the oscillation circuit and the second resonance circuit, and the frequency of the first resonance circuit is detected. apparatus. 4. A lock device, a key for mechanically unlocking the lock device, a first resonance circuit fixed to a key head of the key and comprising a series circuit of a capacitor and a coil antenna, and attached to the lock device. And an oscillation circuit including a coil antenna; a second resonance circuit attached to the lock device and including the coil antenna; and an operation control circuit connected to the oscillation circuit and the second resonance circuit. When the oscillation circuit is driven at a specific frequency and the first resonance circuit resonates with the specific frequency, the second resonance circuit detects the resonance of the first resonance circuit. Thereby, the operation control circuit sends a drive signal to the controlled object, and when the oscillation circuit is driven at a specific frequency and the first resonance circuit does not resonate at the specific frequency, the operation control circuit operates. Operation control unit function of the control circuit is characterized in that it is stopped for a certain time.