JPH0738597Y2 - Electronic key device - Google Patents

Description

FIELD OF THE INVENTION This invention relates to a key, and more particularly to an electronic key device including a circuit for generating a remote control signal and a light source.

2. Description of the Related Art For example, as disclosed in Japanese Patent Laid-Open No. 62-173354, a key that generates an optical signal including a predetermined code signal and a specific key that generates a coincidence signal when receiving an optical signal emitted from the key Anti-theft devices having code discriminating means are known. This anti-theft device has a picking signal output means, and when it is unlocked without generating the coincidence signal of the specific code discrimination means, it is judged as an illegal unlock and the alarm device is activated. However, if the optical signal emitted from the key is received and unlocked while the coincidence signal is generated from the specific code discriminating means, the alarm device does not operate.

Further, Japanese Patent Laid-Open No. 174476/1987 discloses a key for generating an optical signal containing a predetermined code signal and a specific code provided on a lock device for generating a coincidence signal when receiving an optical signal emitted from the key. There is disclosed an electronic control device for a house, an automobile, etc., which has a discriminating means and a controlled portion which is operated by a coincidence signal of the specific code discriminating means. In this electronic control unit, the battery, the switch means, the power supply switching circuit connected to the battery and the switch means, the specific code generating means operated by the output of the power supply switching circuit, and the specific code by the output of the specific code generating means. And a light-emitting element that generates an optical signal. The optical signal emitted from the light emitting element is received by the light receiving element connected to the specific code discriminating means. The specific code determining means sends an output to the controlled unit when the signal received by the light receiving element and the preset code signal match.

Further, as disclosed in Japanese Patent Publication No. 56-11032, there is known a lock device including a lock mechanism for operating a lock portion by electric means and a key mechanism equipped with a transmitter.
Each of the lock mechanism and the key mechanism is provided with a pulse pattern generator that generates a specific pulse train in synchronization with a clock signal generated by a predetermined number of times from the oscillator of the key mechanism. The lock mechanism and the key mechanism are connected to each other by an optical transmission means, and when both pulse trains are temporally coincident,
The locking part of the lock mechanism is unlocked.

As disclosed in Japanese Examined Patent Publication No. 63-11509, there is known a vehicle lock control device having a transmitting section independent of the vehicle and a receiving section mounted on the vehicle. The transmitter includes a DC power supply, an oscillator that oscillates a message, and a transmitter that remotely transmits the message in series. The receiving unit includes a power supply device, a receiving device that receives a message, and
It has a memory for storing only one encoded message and a comparator for comparing the received message with the message stored in the memory and generating one signal if they match. The transmitter of the transmitter has a diode for emitting infrared rays, and the receiver of the receiver has a light receiving diode.

Japanese Unexamined Patent Publication No. 64-52970 discloses a key switch having a first electric circuit, a key having a second electric circuit, and a second electric circuit formed by inserting the key into a key hole of the key switch. A key device having a key switch and contact means provided on the key so as to be electrically connected to the electric circuit of the above. The contact means of this key device comprises a fixed contact portion fixed to the key switch, and a movable contact portion which is retractably received by the key while being spring-biased so as to elastically protrude from the key. When the key of the key device is rotated to the on position or the start position, the fixed contact and the movable contact come into contact with each other, and an optical signal is emitted from the key, so that the engine can be operated.

Further, Japanese Utility Model Laid-Open No. 64-33135 discloses an electronic key device which is spring-biased so as to freely move in and out of a grip portion to normally cover the contact and which is provided with a protective cover for exposing the contact when the key hole is inserted. Has been done.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, in the conventional key with the infrared light emitting device, it is necessary to form the contact point on the metal key body through the insulating material, which makes the insulating structure complicated and the key manufacturing process. Took a long time to

An object of the present invention is to provide an electronic key device that does not require a fixed contact to be provided on a metal key body.

An electronic key device according to the present invention is provided with a key head, a metal key part provided at an end of the key head, and a predetermined code arranged in the key head and for operating a locking device. A substrate that supports a transmitter that generates a remote control signal including a signal. When the key part is inserted into the lock device, a fixed contact that can come into contact with the contact of the lock device is formed in the extension part of the board, and the contact of the lock device and the fixed contact are brought into contact with each other to supply power to the transmitter supported by the board. Supply. Also,
A slide member provided on the key portion and movable along the extension portion of the substrate is provided, and a spring for biasing the slide member to a closed position covering the fixed contact is provided. When the key portion is inserted into the lock device and rotated, the slide member slides on the cam provided in the lock device and is moved to the open position where the fixed contact is exposed against the elasticity of the spring.

Action The key part and fixed contact act as a power supply terminal.When the key part is inserted into the lock device and then the key part is rotated, the slide member slides on the cam provided in the lock device and the spring force is applied. It is moved to an open position that exposes the fixed contacts. When the slide member is in the open position, the fixed contact comes into contact with the contact of the lock device, and power is supplied to the transmitter in the key head through the contact of the lock device. In this invention, since the fixed contact is covered with the slide member except when it is brought into contact with the contact of the lock device, there is no possibility of dirt attachment or damage, and failure such as contact failure is unlikely to occur. Further, the fixed contacts can be manufactured at the same time when the substrate is manufactured.

Embodiment An embodiment in which the present invention is applied to a steering lock device for an automobile will be described below with reference to FIGS. 1 to 13.

First, as shown in FIG. 1, the double lock device 1 includes a transmitting device 3 that generates a remote control signal including a predetermined code signal.
And a key means 2 having a key portion 4, a steering lock device 5 as a mechanical lock device that is unlocked by the key portion 4 of the key means 2, and a remote operation signal generated from a transmitting device 3 of the key means 2. And an electronic lock device 6 which is activated when received. The key means 2 is provided with a key head 7, and an end 7b of the key head 7 is provided with a metal key portion 4
Is provided.

As shown in FIG. 2, the key means 2 includes a battery 9, a substrate 10 and a light guide member 12 housed in a recess 8 formed in the key head 7.
And a send button 13 and the recess 8 is closed by a key cover 11. The substrate 10 has an extension 10a provided with a fixed contact (power supply terminal) 14. Further, on the substrate 10, a plurality of electronic components 15 constituting the transmitter 3, an infrared light emitter 16 (remote operation signal generating means), a light emitting diode 17 and a switch 18 are provided.
Is provided. A shield 19 having a substantially triangular cross section is provided at the front of the infrared light emitter 16. The shield 19 is made of a material that is opaque but transmits infrared rays. Light guide member 12
Has a recess 12c having a substantially U-shaped cross section in which the light emitting diode 17 is arranged adjacent to the light emitting diode 17. As shown in FIG.
After the visible light emitted from 7 is received by the recess 12a, it is emitted to the outside of the key head 7 through the hole 7a formed in the key head 7 and the hole 11a formed in the key cover 11. Therefore, the light guide member 12 has a hole 7a in the key head 7 and a key cover.
A pair of protrusions 12a and 12b that fit into the holes 11a of 11 are formed. When the send button 13 is pressed, the switch 18 is turned on.

The key part 4 of the key means 2 is a notch part for giving a key code.
4a (Fig. 1) is formed. Also, the extension 10a of the substrate 10
The key member 4 is provided with a slide member 20 which is movable along. The slide member 20 moves between a closed position that covers the fixed contact 14 and an open position that exposes the fixed contact 14.
The slide member 20 has a substantially Z-shaped through hole 21 into which the key portion 4 is inserted, and a pair of recesses 22 formed in parallel with the through hole 21.
And a long hole 23 formed in the width direction. A pair of recesses
An end portion is arranged on a spring 24 that urges the slide member 20 to a closed position that covers the fixed contact 14. A pin 25 inserted into the through hole 4b formed in the key portion 4 is arranged in the long hole 23, and the movement distance of the slide member 20 is limited.

As shown in FIG. 2, a metal terminal 26 having elasticity shown in FIG. 4 is provided between the battery 9 and the substrate 10.
The terminal 26 has a terminal body 26a that contacts the negative terminal of the battery 9, and an arm portion 26b that extends from the terminal body 26a and is electrically connected to the key portion 4.

The steering lock device 5 includes a cover 30 having a cam 31, a collar 32 rotatably arranged in the central opening 30a of the cover 30, and a substrate 33 arranged outside the collar 32 in the cover 30. Have. The substrate 33 has a pair of elastic contacts 34 and a pair of infrared receivers 35. A window for infrared transmission at a position corresponding to the infrared receiver 35 of the cover 30
36 is formed. The window 36 is provided with an infrared transparent material.

6 and 8 show a state in which the key portion 4 is inserted into the steering lock device 5 in the lock position. In this state, the fixed contact 14 is at a position angularly separated from the contact 34, and the slide member 20 is at a position to cover the fixed contact 14 as shown in FIG. When the key portion 4 is rotated from the lock position to the start position, the slide member 20 abuts on the cam 31 of the cover 30 as shown in FIGS. 7 and 9, and as shown in FIG. It is moved inward against the elasticity. Further, when the key portion 4 is rotated, the fixed contact 14 comes into contact with the one contact 34, and the infrared ray emitting device 16 emits infrared rays including a predetermined code.

FIG. 12 shows a remote control signal generating circuit of the present invention which is built in the key means 2 and generates infrared rays. This infrared light emitting circuit has, for example, a transmission control circuit 80 composed of a one-chip microcomputer. A capacitor 82 is connected in parallel to the battery 9, and the positive terminal of the battery 9 is connected to the first input terminal I ₁ of the transmission control circuit 80 via the first diode 81. The first diode 81 has a function of preventing voltage application to the battery 9 when power is externally applied through the fixed contact 14. It is also desirable to use a Schottky barrier diode to minimize the diode voltage drop during battery operation. Further, the capacitor 83 is connected to the first input terminal I ₁ . The negative terminal of the battery 9 is connected to the third input terminal I ₃ of the transmission control circuit 80 via the switch 18, the third diode 84 and the capacitor 85. The third diode 84 has the function of adjusting the level of the voltage applied to the third input terminal I ₃ of the transmission control circuit 80 when power is supplied from the outside through the fixed contact 14. The negative terminal of the battery 9 and the capacitor 82 are connected to the second input terminal I ₂ . The cathode of the third diode 84 is connected to the second input terminal I ₂ via the resistor 86. Further, a parallel circuit of a resistor 87 and a diode 88 is connected between the second input terminal I ₂ and the third input terminal I ₃ . Input terminal I ₄ and
I ₅ is connected by resistor 89. The capacitor 8 and the resistor 87 form a trigger circuit, and when the switch 18 is turned on or a voltage is applied to the fixed contact 14, the first input terminal I ₁
Give a trigger pulse to.

The output terminal O ₁ of the transmission control circuit 80 is connected to the base (control terminal) of the transistor 91 (switching element) via the resistor 90. The emitter of the transistor 91 is connected to the fixed contact 14 and the switch 18. Further, the fixed contact 14 is connected to the first input terminal I ₁ via the second diode 92. When the battery 9 is used, the second diode 92 has a function of preventing leakage of electric current from the battery 9 to the outside through the fixed contact 14. The collector of the transistor 91 is connected to the infrared light emitter 16 via the resistor 93. The infrared light emitter 16 is a light emitting diode. Further, the light emitting diode 17 and the resistor 94 are connected between the fixed contact 14 and the output terminal O ₂ . Input terminals I _{6 to} I ₈
Is connected to the ROM 95, the output terminal O ₃ is grounded.

In the above configuration, when the switch 18 is turned on during remote operation, a trigger pulse is applied from the battery 9 to the third input terminal I ₃ through the switch 18, the third diode 84 and the capacitor 85. Therefore, a predetermined code pulse is generated from the output terminal O ₁ by the program stored in the ROM 95. Therefore, the transistor 91 is turned on and off, and the infrared light emitter
16 produces an infrared signal. At the same time, output terminal O ₂
Generates a low level signal for a certain period of time, so that the light emitting diode 17 is turned on. Therefore, the operator can
The operation of the infrared light emitter 16 can be recognized by lighting. Also, instead of turning on switch 18, fixed contact
When a voltage is applied to 14, the same operation as above is performed.

When the key portion 4 is inserted into the steering lock device 5,
The circuit shown in FIG. 13 is configured. That is, the transmission control circuit 80
The negative side terminal of the battery 9, including the electronic circuit 15, the infrared light emitter 16, and the battery 9 is connected to the key portion 4, and the key portion 4 is grounded through a conductive metal such as a tumbler (not shown) provided inside the steering lock device 5. It Further, the fixed contact 14 is connected to the power supply 96 of the automobile. The drive control circuit 41 is connected to the power supply 96, the infrared receiver 35, and the drive unit 76, and is grounded together with the conductive metal such as the tumbler.

In the above structure, when the key portion 4 is inserted into the steering lock device 5 and rotated, the steering lock device 5 is unlocked. The ignition switch 37 is turned on with the rotation of the key portion 4, and the key cover 11 of the key means 2 is provided with the cam 31 provided on the steering lock device 5.
To the open position where the fixed contact 14 of the key means 2 is exposed. When the key portion 4 is further rotated, the contact point 34 of the steering lock device 5 and the fixed contact point 14 of the key means 2 come into contact with each other to supply electric power to the key means 2, and the infrared generator of the key means 2 generates a remote control signal. To do.

Effect of the Invention As described above, in the electronic key device according to the present invention, the fixed contacts can be manufactured at the same time when the substrate is manufactured, so that the manufacturing is easier than the manufacturing of the key body made of metal.

[Brief description of drawings]

1 is a perspective view of a double lock device equipped with an electronic key device according to the present invention, FIG. 2 is an exploded perspective view, FIG. 3 is an assembled view of key means, FIG. 4 is a perspective view of a terminal, and FIG. FIG. 7 is a partial sectional view of the key means, FIG. 6 is a front view showing a state in which the key means is inserted in the steering lock device, FIG. 7 is a front view showing a state in which the key means is rotated to a start position, and FIG. Is a sectional view showing a state in which the key means is inserted into the steering lock device, FIG. 9 is a sectional view showing a state in which the key means is rotated to the start position, and FIG. 10 is a state in which the fixed contact is covered by the slide member. FIG. 11 is a partial front view of the key means, FIG. 11 is a partial front view of the key means with the fixed contacts exposed, and FIG. 12 is an electric circuit diagram of the key means showing a remote control signal generating circuit according to the present invention. Fig. 13 shows key means, mechanical locking device and Is a circuit diagram showing an electrical configuration of an electronic locking device. 3 ... Transmitting device, 4 ... Key part, 5 ... Steering lock device (lock device), 7 ... Key head, 7b ... End part, 10 ... Board, 10a ... Extension part, 14 ... Fixed Contact, 20
...... Slide member, 24 ...... Spring, 31 ...... Cam, 34
……contact,

Claims (1)

[Scope of utility model registration request] 1. A key head, a metal key portion provided at an end portion of the key head, and a transmitter for generating a remote operation signal including a predetermined code signal for activating a locking device which is disposed in the key head. A substrate supporting the device, and forming a fixed contact in the extension of the substrate that can contact the contact of the locking device when the key part is inserted into the locking device, and contacting the contact of the locking device with the fixed contact In an electronic key device for supplying electric power to a transmitting device supported by a slide member, the slide member being provided in the key part and movable along an extension part of a substrate, and a spring for biasing the slide member to a closed position covering a fixed contact. When the key part is inserted into the lock device and rotated, the slide member slides on the cam provided in the lock device to expose the fixed contact against the elastic force of the spring. Electronic key device characterized in that it is moved.