JP2555214Y2 - Door lock 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 door lock device which, when a user issues an airborne signal from a transmitting means provided on a key, decodes the signal and automatically locks and unlocks the door. .

[0002]

2. Description of the Related Art Recently, for example, some automobiles are equipped with a so-called wireless door lock device. This is because a transmitter is provided on the ignition key, and when the driver emits a radio signal from this transmitter, the reception signal discriminating means provided on the vehicle body decodes the radio signal and the radio signal is set to the vehicle. If the signal is a specific signal, the door is automatically locked by operating the electric actuator, or the lock is automatically released.

In this wireless door lock device, a radio signal emitted from a transmitter is usually constituted by a code signal of several tens of bits, and the content of the code is individualized for each automobile. Therefore, it is practically impossible for anyone other than the owner of the vehicle to release the door lock by emitting a radio signal of a specific code unique to the vehicle, which is extremely effective in preventing theft of the vehicle.

[0004]

Incidentally, even in a vehicle equipped with a wireless door lock device, it is a fact that a manual operation mechanism is usually provided. As is well known, when the ignition key is inserted into a key cylinder provided on a door and the rotor is turned, the link mechanism locks or releases the door lock mechanism based on the rotation of the rotor. To lock or unlock the door.

For this reason, if a person other than the owner inserts foreign matter into the key cylinder and turns the rotor, the lock may be unlocked. From the viewpoint of theft prevention, the advantage of providing the wireless door lock device is an advantage. Will be spoiled.

Therefore, it is conceivable to eliminate the manual operation mechanism and use only the wireless door lock device. However, in this case, for example, when the battery provided in the key as a power source of the transmitter is exhausted, the door cannot be opened because there is no other means for releasing the lock.

The present invention has been made in view of the above circumstances, and has as its object to operate the electric lock mechanism when the airborne signal emitted from the key transmitting means is a specific signal to operate the door. An object of the present invention is to provide a door lock device capable of operating an electric lock mechanism even when a battery serving as a power source of a transmission unit is exhausted in a device that locks or unlocks the lock.

[0008]

The door lock device according to the present invention is provided with an electric lock mechanism which uses an electric actuator as a drive source and locks and releases the door by locking and releasing the electric actuator. A door is provided with a key cylinder, a key inserted into the key cylinder is provided, the key is provided with a battery and a transmitting means for emitting an aerial propagation signal using the battery as a power source, and the aerial propagation signal received by the receiving means is transmitted from the key. A first signal discriminating means for locking and releasing the electric actuator when the specific signal is received, and when the rotor of the key cylinder is turned in one direction and the other direction from the neutral position by the key, Signal generating means for generating a signal corresponding to the rotation pattern is provided; Are signal is characterized in the provision of the second signal determining means for locking operation and release operation of the electric actuator when a specific signal.

[0009]

When the battery provided in the key is depleted, when the key is inserted into the key cylinder and the rotor is rotated in a normal or reverse direction in a specific pattern, the signal generation means generates a signal corresponding to the rotation pattern of the rotor. I do. If the rotation pattern of the rotor is a specific pattern, the signal generating means generates a specific signal, which is decoded by the second signal determining means to operate the electric actuator of the electric lock mechanism.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings, applying to an automobile.

In FIG. 1, reference numeral 1 denotes an electric lock mechanism provided on a vehicle body (not shown), and includes a DC motor 2 that rotates forward and reverse as an electric actuator. When the DC motor 2 rotates in the forward direction (lock operation), the electric lock mechanism 1 applies a lock displacement to a locking portion (not shown) and engages with an engaged portion on the door side (not shown) to close the door. To lock. Further, when the DC motor 2 rotates in the reverse direction (release operation), a release displacement is given to the locking portion to release the engagement with the engaged portion and release the lock of the door.

On the other hand, in FIG. 2, reference numeral 3 denotes a key cylinder provided on the door. A rotor 5 is rotatably provided in a rotor case 4 of the key cylinder 3, and an ignition key 6 can be inserted into the rotor 5 from a key insertion opening 5a. The rotor 5 is rotated by the ignition key 6 in the forward and reverse directions indicated by arrows A and B from the neutral position.

In the ignition key 6, a replaceable battery 7 is mounted, and a transmitter 8 as a transmitting means using the battery 7 as a power source is provided.
Then, the "LOO" provided on the ignition key 6
When the "K" button 9 and the "UNLOOK" button 10 are pressed, a lock command and a release command are issued from the key 6 as an aerial radio signal, for example, a radio signal. The command signal is configured as a code signal of several tens of bits, and the contents of the code are different between the lock command and the release command, and the lock command and the unlock command are respectively set to specific codes for each vehicle. .

The radio signal emitted from the ignition key 6 is received by the automobile antenna 11 shown in FIG. The radio signal received by the antenna 11 is E
The signal is converted into a code signal by a receiving circuit 12 in a CU (electric control unit) and input to a microcomputer 13 as first signal discriminating means.

The microcomputer 13 includes the receiving circuit 1
2 is compared with the lock command code and the release code stored in the EEPROM 14.
When the received code signal matches the lock command code, the microcomputer 13 causes the DC motor 2 to rotate forward (lock operation) via the drive circuit 15 to lock the door by the electric lock mechanism 1, and If it matches the release command code, the DC motor 2 is rotated reversely (release operation) via the drive circuit 15 to release the door lock by the electric lock mechanism 1.

As shown in FIG. 1, the key cylinder 3 is provided with a changeover switch 16 which operates in accordance with the direction of rotation of the rotor 5. This changeover switch 1
Reference numeral 6 includes two fixed contact pieces 16a and 16b and one common movable contact piece 16c. The common movable contact piece 16c and the fixed contact piece 16a constitute a forward rotation detection switch C, and The contact piece 16c and the fixed contact piece 16b constitute a reverse rotation detection switch D. When the rotor 5 is at the neutral position, both of the detection switches C and D are off. When the rotor 5 is turned from the neutral position in the direction of arrow A, which is the forward direction, the forward rotation detection switch C is turned on. When it is turned in the direction of arrow B, which is the reverse direction, the reverse rotation detection switch D is turned on.

The movable contact 16c of the changeover switch 16
Are grounded, and both fixed contact pieces 16a and 16b are connected to input ports I1 and I2 of a microcomputer 13 as signal generating means via signal lines 17a and 17b. The signal lines 17a and 17b are connected to the positive terminal of the power supply via the resistors 18 and 18. The negative terminal (not shown) of the power supply is grounded. Therefore, when both the detection switches C and D are off, the levels of the input signals S1 and S2 to both the input ports I1 and I2 are both high. When the detection switches C and D are turned on, the input port I
The input signals S1 and S2 to 1 and I2 are switched to low level.

When the detection switches C and D are turned on and off, the microcomputer 13 forms a serial code signal under certain conditions. This constant condition is that, in the case of this embodiment, if the type of the code signal is constituted by two values of “0” and “1”, first, the normal rotation detection switch C
, A code signal of "1" is generated by detecting a down edge when the signal S1 switches from the high level to the low level, and the signal S is generated by turning on the reverse rotation detection switch D
2 generates a code signal of “0” by detecting a down edge when switching from high level to low level. The second condition is that if a down edge of the signal S1 or S2 is not detected within a certain period of time after the detection of the down edge of the signal S1 or S2, the signals generated up to that time are regarded as a series of serial code signals.

The series of serial code signals are compared with the lock side serial code and the release side serial code stored in the EEPROM 14 by the microcomputer 13 as the second signal discriminating means. And
When the serial code signal matches the lock-side serial code, the microcomputer 13 rotates the DC motor 2 of the electric lock mechanism 1 in the forward direction to lock the door, and when matches the unlock-side serial code, The DC motor 2 is rotated in the reverse direction to unlock the door.

In this embodiment, the serial code serving as a comparison reference stored in the EEPROM 14 can be changed by the owner of the automatic operator. For this change, for example, a specific switch among the switches provided on the dashboard of the automobile is operated, and then the rotor 5 of the key cylinder 3 is rotated in the forward and reverse directions in the same manner as described above. Then, the microcomputer 13 creates a serial code signal in accordance with the on / off of the two detection switches C and D accompanying the rotation of the rotor 5, and uses the signal as an EEPRO as a new comparison reference serial code.
Store it in M14.

Next, the operation of the above configuration will be described.

When the driver leaves the car, he operates the "LOOK" button 9 of the ignition key 6 to lock the door. Then, a lock command signal is emitted as a radio signal from the ignition key 6, and the radio signal is received by the antenna 11 and converted into a code signal by the receiving circuit 12. And the microcomputer 13
Compares the converted code signal with the code content stored in the EEPROM 14. In this case, since the code signal matches the content of the lock command code, the microcomputer 13 locks the door by rotating the DC motor 2 of the electric lock mechanism 1 forward.

When the driver drives the car, the driver operates the "UNLOOK" button 10 to unlock the door. Then, a release command signal is emitted from the ignition key 6 as a radio signal, and the radio signal is converted into a code signal in the same manner as described above, and the microcomputer 13 compares the code signal with the code content stored in the EEPROM 14. In this case, since the code signal matches the release instruction code, the DC motor 2 is rotated in the reverse direction, and the door is unlocked.

When the door is locked and the radio signal does not match the content of the release command code, the microcomputer 13 does not energize the DC motor 2 and the lock mechanism 1 is in the locked state. You will not be able to open the door. Therefore, unless the radio signal received by the receiving circuit 12 is a specific code, the door is not unlocked, so that the effect of preventing theft is extremely large.

When the battery 7 serving as the power source of the transmitter 8 is exhausted due to long-term use, it becomes impossible to transmit a radio signal from the ignition key 6. Therefore, the door cannot be unlocked depending on the radio signal. In such a case, the ignition key 6 is inserted into the rotor 5 of the key cylinder 3 and the detection switch C and D are turned on and off by rotating the rotor 5 in a specific rotation pattern in the forward and reverse directions. I do.

Now, it is assumed that the signals S1 and S2 change as shown in FIGS. 3A and 3B by turning on and off the detection switches C and D. Then, the microcomputer 13 sets “11” as shown in FIG.
010001 ”is generated. This serial code signal is compared by the microcomputer 13 with the lock-side serial code and the release-side serial code stored in the EEPROM 14. When the serial code signal matches the lock-side serial code, the microcomputer 13 determines that the DC motor 2
Is rotated in the forward direction to lock the door, and when it matches the release-side serial code, the DC motor 2 is rotated in the reverse direction to unlock the door.

Here, especially when the door is in a locked state, the generated serial code signal is
, The DC motor 2 is not energized. Therefore, even if a person other than the owner of the automobile operates the key cylinder 3 and turns the rotor 5, there is no probability that the serial code signal generated by this operation matches the serial code stored in the EEPROM 14. ,
It is extremely effective in preventing theft.

As another example of generating a serial code signal by rotating the rotor 5, one of the two detection switches C and D in this embodiment, for example, a normal rotation detection switch C is provided,
When the switch C is turned on (when the rotor 5 is rotated from the neutral position in the direction of arrow A), a code signal of "1" is generated, and when the switch C is turned off (the rotor 5 is moved in the direction of arrow B). (When rotated back to the neutral position), a code signal of "0" is generated, or the switch C
It is also conceivable to generate a code signal of “1” when the power supply is turned on for a predetermined time (about several seconds), and to generate a code signal of “0” when the power supply is turned on momentarily (about 0.5 seconds). . However, under such code signal generation conditions, the rotation mode is simple and accidental because the operation is to repeat the operation of rotating the rotor 5 from the neutral position in the direction of arrow A to return to the neutral position. But EE
There is a problem that the serial code easily matches the serial code stored in the PROM 14.

However, in this embodiment, the operation of rotating the rotor 5 from the neutral position in the direction of arrow A to return to the neutral position and the operation of rotating the rotor 5 from the neutral position in the direction of arrow B to return to the neutral position As described above, the serial code signal is generated by the permutation combination of E.
The probability of accidental coincidence with the serial code stored in the EPROM 14 can be said to be nil. Further, in the present embodiment, when the rotor 5 is returned to the neutral position, no code signal is generated. Therefore, when storing the operation procedure, it is not necessary to pay special attention to return to the neutral position.
It can be stored relatively easily. Further, if the rotor 5 is held at the neutral position during the operation, no code signal is generated, so that the holding time at the neutral position can be used as a preparation time for remembering the next code (operation procedure). The effect of is obtained.

In addition, in this embodiment, the EEPROM 14
Can be arbitrarily set by the owner of the vehicle, which is more effective in preventing theft.

The conditions for generating the serial code signal by the microcomputer 13 are not limited to the above embodiment, but may be as shown in FIG.

First, the serial signal generation condition is as follows. First, if the low level state of the signal S1 continues for a predetermined time T by keeping the forward rotation detection switch C turned on, "1" is set every time the predetermined time T elapses. , And if the low-level state of the signal S2 continues for a predetermined time T by continuously turning on the reverse rotation detection switch D, a code signal of "0" is generated each time the predetermined time T elapses. thing. At this time, every time the predetermined time T elapses,
A notification unit, for example, a buzzer sounds to notify the signal generation. The second condition is that when a new signal is not generated for a predetermined time, a signal generated so far is used as a series of serial code signals. FIG. 3 shows that a serial code signal of “11010001” was generated under such a condition.

In addition, when the user notices that the rotation pattern of the rotor 5 is wrong during the generation of the serial code signal, for example, by operating a door handle (not shown), the serial signal generated so far is cleared. You may comprise.

In addition, the present invention is not limited to the embodiment described above and shown in the drawings. For example, airborne signals are not limited to radio waves, but may be ultrasonic waves, infrared rays, or the like. Various changes can be made without departing from the scope of the present invention.

[0035]

As described above, according to the present invention, the door is unlocked by the electric lock mechanism only when the airborne signal is a specific signal. If the transmitter does not emit an aerial propagation signal, or if the aerial propagation signal has a content different from the specific signal, the door remains locked, so the door is unlocked by unauthorized operation There is no danger of being done.

Further, when the rotor of the key cylinder is rotated in a specific rotation pattern, the door is unlocked by the electric lock mechanism, thereby providing a power source for the transmitter provided in the ignition key. Unlock the door by inserting the key into the key cylinder and rotating the rotor in a specific pattern in the forward and reverse directions even if the battery is exhausted and it is no longer possible to emit airborne signals. Can be.

In addition, since the signal is generated by a permutation combination of the operation of rotating the rotor in the forward direction from the neutral position and the operation of rotating the rotor in the reverse direction from the neutral position, the lock is unlocked because it coincides with the normal specific signal by accident The probability of losing is almost nil, which is more effective in preventing theft.

[Brief description of the drawings]

FIG. 1 is an electrical configuration diagram showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a key cylinder and an ignition key.

FIG. 3 is a diagram showing a relationship between an input signal to a microcomputer and a generated serial code signal;

FIG. 4 is a view corresponding to FIG. 3, showing another embodiment of the present invention.

[Explanation of symbols]

1 is an electric lock mechanism, 2 is a DC motor (actuator), 3 is a key cylinder 5 is a rotor, 6 is an ignition key, 7 is a battery, 8 is a transmitter, 11 is an antenna, 12 is a receiving circuit (receiving means), 13 Is a microcomputer (first and second signal discriminating means, signal generating means), and 16 is a changeover switch (signal generating means).

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor ▲ Taka ▼ Kiyoshiyuki No. 1 Toyota No. 1 in Oguchi-cho, Oguchi-machi, Niwa-gun, Aichi Prefecture Inside Tokai Rika Electric Works, Ltd. (56) References JP-A-5-25966 ( JP, A)

Claims (1)

(57) [Scope of request for utility model registration] An electric lock mechanism that uses an electric actuator as a drive source to lock and release a door by locking and releasing the electric actuator; a key cylinder provided on the door; A key to be inserted, a battery provided on the key, a transmitting means for generating an aerial propagation signal using the battery as a power source, and the electric motor when the aerial propagation signal received by the receiving means is a specific signal transmitted from the key. First signal discriminating means for locking and unlocking the actuator; and signal generation for generating a signal according to a rotation pattern when the rotor of the key cylinder is rotated in one direction and another direction from a neutral position by the key. Means, when the signal generated by the signal generation means is a specific signal, A door lock device comprising: a second signal discriminating means for locking and releasing an actuator.