JPH0437909B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electronic lock for an automobile door that allows the door to be unlocked by operating an outdoor handle for opening the door.

[Conventional technology]

2. Description of the Related Art Conventional electronic door locks for automobiles have a plurality of push button switches provided near an outdoor handle, and the lock can be unlocked by operating the push button switches in a preset order.

However, this push-button switch type electronic lock requires multiple switches and is exposed to wind and rain, so countermeasures must be taken.
Therefore, it has the disadvantage that it is expensive, and it is difficult to operate it in a dark place such as at night.

Therefore, we provided a switch that was opened and closed by pulling the outdoor handle, and the door could be unlocked by operating the outdoor handle and sending out the same pulse signal of a preset pattern. For example, Japanese Patent Application Publication No. 1983-
This is disclosed in Publication No. 222267, etc.

In the case of this method, only one switch is required, and since this switch is operated by an outdoor handle, it does not need to be exposed to the surface, and therefore no measures against wind and rain are required.
It also has the advantage of being easy to operate in dark places because it is operated by a handle.

By the way, the device that unlocks by operating the outdoor handle does so by counting the number of times the operator such as the driver operates the outdoor handle, so there is a possibility that the switch may fail to pull the handle and cause the switch to chatter. As a result, the number of erroneous operations increases and prompt and reliable unlocking cannot be performed.

[Object of the Invention] The present invention has been made in view of the above points, and its purpose is that when an outdoor handle is operated, an oscillating sound is generated at regular intervals. To provide an electronic door lock for an automobile, which can unlock the door by listening to the code and repeating an operation of releasing the hand based on a preset code.

[Embodiments of the invention]

An embodiment of the present invention will be described with reference to the drawings.
is a door switch that turns on when the door is opened, 2
is a handle switch that is turned on by pulling the outdoor handle (hereinafter simply referred to as the handle), 3 is an ignition switch, 4 is an AND gate that uses the switches 1 to 3 as inputs, and 5 uses the output of AND gate 4 as input. , for example, a timer that sends out an output for 10 seconds when an output signal is sent from the AND gate 4 for 5 seconds or more; 6 is a gate circuit that opens the gate with the output from the timer 5;
7 is an input gate circuit that allows a pulse signal from the handle switch 2 to pass through and shuts off when a signal from a timer 16 (to be described later) is input; 8 is a pulse interval while the output from the input gate circuit 7 is being input; is a pulse generator that sends out a pulse signal of 0.5 seconds or less, 9 is a buzzer that generates a tone for each pulse signal from the pulse generator 8, and 10 is for counting the number of pulse signals from the pulse generator 8. and a counting circuit which sends an output when the pulse signal interval is, for example, 0.5 seconds or more; 11 is a reset signal generating circuit which inputs a reset signal to the counting circuit 10 when the signal from the counting circuit 10 is input; 12; 13 is a code storage circuit that stores the pulse signal of the pulse generator 8 that has passed through the gate circuit 6 four times for each signal from the counting circuit 10; 13 is a code storage circuit that stores the pulse signal of the pulse generator 8 and the code storage circuit 12; 14 is a door lock actuator that unlocks the door lock using a signal from the code comparison circuit 13; 15 is the code comparison circuit; An error counter 16 counts the output when an error occurs in the comparison in 13, sends out the output when the count reaches, for example, 5 times, and is reset by a match signal from the code comparison circuit 13. 17 is a timer that sends out an output for a certain period of time, for example, 5 seconds, and closes the input gate circuit 7. 17 is a timer that sends an output for a certain period of time, for example, 4 seconds when the handle switch 2 is turned on. For example, the handle is operated three times and three pulse signals are input, the output from the timer 17 is input, and the door is closed and the door switch 1 is turned off. This is a condition determination circuit that sends out an output and locks the door lock actuator 13 according to the condition.

Next, the operation will be explained based on the above configuration.

(I) Code memorization operation First, open the door, turn on door switch 1, insert the key into ignition switch 3 and turn it on, then pull the handle and turn on handle switch 2, and output from AND gate 4. is sent out and input to the timer 5. If this handle operation is performed for 5 seconds or more and the handle switch 2 is kept on, the timer 5 outputs an output for 10 seconds and the gate circuit 6 is opened.

In this state, if you operate the steering wheel,
While the handle is pulled and the handle switch 2 is turned on, the pulse generator 8 continues to send out a pulse signal of a constant frequency. Then, the buzzer 9 generates a beep based on this pulse signal, and the counting circuit 10 also counts the pulse signal.
On the other hand, the code storage circuit 12
A pulse signal from the pulse generator 8 is also input to the memory 8, and the number of input pulse signals is stored. Now, when you operate the handle and confirm that the pulse generator 8 sends out four pulse signals and the buzzer 9 emits four beeps, release your hand from the handle, and the code memory circuit 12 reads "4". remember something. Furthermore, when the handle is released, the pulse generator 8 also stops and the pulse signal is no longer sent, so the output is sent from the counting circuit 10 after 0.5 seconds, and the code storage circuit 11 assumes that this is the first operation. , this is the first “4”
It is stored as . On the other hand, a reset signal is input from the reset signal generating circuit 11 to the counting circuit 10, and therefore the counting circuit 10 is reset to zero and waits for the input of the next pulse signal.

Then, when the handle is operated again, the second time "3" is stored in the code storage circuit 12 by the same operation as described above. Thereafter, similar operations are repeated, and the third time is "2", the fourth time is "1", and so on.

() Door lock unlocking operation To unlock the door that is currently closed and locked, operate the handle and turn on the handle switch 2. This on signal is sent as a pulse through the input gate circuit 7. Since the pulse signal is input to the generator 8, the pulse generator 8 sends out a pulse signal while the handle switch 2 is turned on.
This causes the buzzer 9 to generate a beep, so
The operator releases the handle after hearing the four beeps. Therefore, four pulse signals are input to the code comparison circuit 13, and the code comparison circuit 13 compares the first memory contents with the stored number "4" in the code storage circuit 12.

Next, when the steering wheel is operated again in the same manner as described above and the handle is released after hearing three beeps, the number is compared with the number "3" in the code storage circuit 12 in the same manner as described above.

The above operation is performed four times, and the number of pulse signals for each operation and the code storage circuit 12 are calculated by performing the above operation four times.
If the stored contents match, the code comparator circuit 13 sends out a match signal, and the door lock actuator 14 performs an unlocking operation, making it possible to open the door.

Incidentally, if the number of pulse signals for each operation does not match the number of stored contents of the code storage circuit 12 at that time, a non-coincidence output is sent out.
The output is counted in an error counter 15. When erroneous operations are performed five times in this manner, the error counter 15 sends out an output, which causes the timer 16 to send out an output for about 5 seconds, closing the input gate circuit 7. Therefore, the ON signal of the handle switch 2 cannot be accepted during these 5 seconds. Then, when the ON signal is sent from the handle switch 2 again after 5 seconds, the same operation as above is performed, but if the operation is erroneous again, the error counter 1
5, and the input gate circuit 7 is closed for about 5 seconds. Therefore, each operation takes time, which is effective in preventing theft.

When the handle is operated correctly and a match output is sent out from the code comparison circuit 13, a reset signal is input to the error counter 15, so that the error counter 15 is reset to zero.

() Locking operation of door lock To lock a door from outside the vehicle, operate the handle of the opened door once, and a pulse signal is sent from the handle switch 2 to the timer 17. This causes the timer 17 to send out an output for 4 seconds, for example. On the other hand, handle switch 2
A pulse signal is also sent to the condition determination circuit 18, and this pulse signal is counted. Here, suppose that the condition determination circuit 18 is set to count three pulse signals (the number of pulses may be one instead of three, or more than three).
That is, since it is a locking operation, no problem will occur even if the number of pulses is the same for all cars, so a small number of pulses is better for operation. ), operate the handle two more times. As a result, the condition determination circuit 18 becomes in a lockable state. In this state, when the door is closed and the door switch 1 is turned off, the condition determining circuit 18 sends a locking signal to the door lock actuator 14 to lock the door. Furthermore, the time it takes to close the door is
Locking is not performed unless it is within 4 seconds after the first pulse signal is sent from the handle switch 2.

〔Effect of the invention〕

As described above, in the present invention, when the handle is operated, a beep is generated, and the operator counts based on a pre-stored pattern code while listening to the beep, and then releases the handle to lock the door. This prevents the switch from chattering due to misoperation of the handle, allowing quick and reliable unlocking of the door, and also making it possible to operate the handle switch with the door switch and ignition switch turned on. By being able to register the code, it is easy to register or change the code, and it is possible to prevent malicious registration of the code input by a third party, and moreover, it is possible to make a mistake in the code input operation multiple times during the unlocking operation. This feature is very effective in preventing theft, as the code input via the handle switch is disabled for a certain period of time.

[Brief explanation of drawings]

The figure is a block diagram showing an electronic lock for an automobile door according to the present invention. DESCRIPTION OF SYMBOLS 1... Door switch, 2... Handle switch, 8... Pulse generator, 13... Code comparison circuit, 14... Door lock actuator, 18...
...Condition judgment circuit.

Claims (1)

[Claims] 1. Door switch 1 that is turned on when the door is opened.
, a handle switch 2 that turns on and off according to the operation of the outdoor handle, an ignition switch 3 that turns on when a key is operated, and a signal from the handle switch 2 passed through, and an output from a timer 16 described later is input. an input gate circuit 7 that shuts off when the handle switch 2 is turned on;
an AND gate 4 that sends out an output in response to ON signals from the door switch 1, handle switch 2, and ignition switch 3; and an output from the AND gate 4 for a certain period of time or more is inputted. and a timer 5 that sends output for a certain period of time.
a gate circuit 6 whose gate is opened by the output of the timer 5 and allows the pulse signal from the pulse generator 8 to pass through; and the pulse generator 8 which passes through the gate circuit 6.
a code memory circuit 12 that stores a pulse signal pattern of 2000, and compares the pattern stored in the code memory circuit 12 with the pattern of the pulse signal outputted from the pulse generator 8 by operating the handle switch 2; a code comparison circuit 13 that sends out an unlock signal when the codes match; a door lock actuator 14 that is unlocked by the output signal from the code comparison circuit 13; and a pulse from the pulse generator 8. A counting circuit 10 that counts signals and sends out an output when the interval between the pulse signals is longer than a certain time, and a reset signal generator that outputs a reset signal to the counting circuit 10 when the output from the counting circuit 10 is input. A circuit 11, an error counter 15 which counts when the output from the code comparison circuit 13 is a mismatch signal and sends out an output when this count exceeds a certain number of times; and a timer 16 that sends an output to the input gate circuit 7 for a certain period of time.