JPS58573A - Electronic lock apparatus for automobile - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to an electronic lock device for automobiles.

In conventional push-button switch-type electronic lock devices in which the door lock is unlocked or locked by a push-button switch installed on the outside of a car, for example, on the door, the number of digits in the unlock number is, for example, 5 or 6 m. The number of digits cannot be changed because it is fixed and memorized, so there is a risk of it being unlocked illegally.
It wasn't practical.

The present invention has been made with attention to this point, and its purpose is to provide an electronic lock device for automobiles equipped with an arbitrary number and digit number setting circuit so that the number of digits can be increased or decreased as appropriate. be.

Embodiments of the present invention will be described below with reference to the drawings.

The control pupil of the electronic lock has a known type push-button number setter 10 composed of a large number of switches, and the output signal from this number setter 10 is transmitted through a counting circuit 11 and a fixed number comparison circuit 12. , and sent to the arbitrary number comparison circuit 13 and gate circuit 16. The counting circuit 11 includes a number setter,
10 outputs are counted and the count signal is applied as an address signal to the fixed number storage circuit 14 and the arbitrary number storage circuit 15. Fixed number storage circuit 14 and arbitrary number storage circuit 1
5 uses ROM and RAM in the embodiment, respectively, and the fixed number comparison circuit 12 and arbitrary number comparison circuit 13
gives output to The arbitrary number storage circuit 15 receives the signal to be stored from the number setter 10 through the gate circuit 16, and the gate circuit 16 is opened and closed by the signal from the fixed number comparison circuit. The arbitrary number comparison circuit 13 is connected to the number setter 1
0 and arbitrary number storage circuit 15,
These are compared, and when they match, an unlock signal is sent to the door lock actiniator 17 as a lock.

The reset signal generation circuit 18 receives signals from the stitch count circuit 11 and the fixed number comparison circuit 12, and adjusts the output at an appropriate timing to reset the counting circuit 11. The arbitrary number digit number setting circuit 19 is operated by the signal from the fixed number comparison circuit 12, and stores the arbitrary number digit number from the signal from the counting circuit 11 which is operated in response to the input from the number setting 11G. Then, at the time of unlocking, the number of digits of the currently stored arbitrary number is output to the arbitrary number storage circuit 15 and the arbitrary number comparison circuit 13, a comparison is made with the set number of digits, and if the comparison is correct, an unlock signal is sent. is served. The detailed circuit diagram of the electric lock is in the second
As shown in the figure.

In the switch group 21 made up of a plurality of button switches 218 to 21e, each button is numbered 1 to 5, and when pressed, a circuit is closed and a signal is generated.

This signal passes through a known chattering prevention circuit 22,
The signal is sent to the OR gate 23 for detecting the number of presses. The switch group 21 and the chattering prevention circuit constitute a ξ number setter. The output of the OR gate 23 is applied to the lie delay circuit 25, which generates a signal if the button is not pressed within a certain period of time (for example, 5 seconds), and is arranged to reset the entire circuit through the OR gate 26.28. The output of the 0 number setter is sent to the OR gate 23 and the address counter 2.
The voltage is applied to a counting circuit consisting of 7. This address counter 27 is an up/down counter, and is a RAM which will be described later.
35 and generates address signals to the ROM 37. Therefore, the address counter 27 counts the signal generated each time the group of pushbutton switch 21 is pressed and closed. The output of the address counter 27 becomes the address input for the RAM 35, which is an arbitrary number storage circuit, and the ROM 37, which is a fixed number storage circuit.
The outputs of OM 37 are provided to comparators 38 and 39, respectively. Compare these! The outputs of the pushbutton switches 21a to 216 are given to i38 and 39. Therefore, the comparator 38 has a button switch input and
A comparison is made sequentially with each digit of the arbitrary number, and the comparator 39 sequentially compares the button switch input with each digit of the fixed number.

When the button switch is pressed once, comparison 1
39 compares this signal with the contents of the ROM 37, and when the two match, a match signal is generated and the shift register 4
1, and a signal is generated at the output terminal OI of the shift register 41.

When the seven signals generated by selectively pressing the button switches 1 to 5 seven times are all equal to the seven (7 digits) signals stored in the ROM 37, the shift register 41 All signals are generated at output terminals 01 to 0,
AND gate 43 is opened and RS flip-flop 46
is set.

This RS flip-flip 460 setting generates a Q signal, which sends a reset signal to comparator '40 and flip-flop 44 through OR gate 45 to reset them. Further, the output of the RS flip-flop 46 shifts the RAM 35 to a "write" state and opens a gate circuit 36 comprised of a gate such as an SCR so that the pushbutton switch input is stored in the RAM 35. Also, since the value of the address counter 27 is 7, a signal is generated at the Off terminal of the value detection circuit 33, which makes one terminal of the AND gate 32 H (high), but the output of the RSS flip-flop 46 is Since the voltage is applied to the other terminal of the AND gate 32, the AND gate 32 opens and the OR gate)29. The address counter 27 is reset through the OR gate 28. At this stage, the comparison of the fixed number signals has been completed, and the system is in a state of waiting for a switch signal for storing an arbitrary code. During this time, the shift register 40 and the RS flip-flop 44 are reset and do not operate due to the output of the RS flip-flop 46.The button switches 218 to 21e are pressed, for example, five times to store an arbitrary number, and five outputs are output. occurs, the address counter 27 counts 5, and if the next button is not pressed for a certain period of time, the timer 25 operates and the OR gate 26. Through the OR gate 28, the 7-dress counter 27 is reset and at the same time the digit number counter 3
The value 5 is registered in 4. At this time, the terminal O of the value detection circuit 33
Since an output is generated at n and a Q signal is generated at the RS flip-flop 46, an output signal is generated at the AND gate 31. This signal is sent to the AND gate 48, and when the AND gate 48 opens, an OR signal is generated. Through gate 47,
The signal is sent to the reset terminals of the shift register 41 and the RS flip-flop 46, and these are reset. Therefore, since the Q signal of the RS flip-flop 46 is not generated,
The gate circuit 36 is closed, the RAM 35 switches from the "write" state to the "read" state, and storage of the arbitrary code is completed. To unlock the electric lock, press the button switches 21a to 21zte in the correct order for the registered number of digits, and the switch signal is sent to the comparator 38, where the switch signal and the arbitrary signal stored in the RAM 35 are combined. are the address signal of the address counter 27 and the digit number counter 3.
4 is compared according to the signals from 4. When all 1-digit (n) signals are received, the terminals 01 to 01 of the shift register 40 are turned on.
are all set to H, the AND gate 42 is opened, and the RS flip-flop 44 is set. With this set, R
Since an output is generated at the Q terminal of the S flip-flop 44 and the monomultiply blade is triggered, the door unlocking actuator 55 is operated through the inverter 54 to unlock the door. At the same time as setting the flip-flop 44, this flip-flop is ANDed by the output with the On terminal of the value detection 133.
Gate 30 opens, OR gate 29. The address counter 27 is reset through the OR gate 28. In this state, when the second pushbutton switch 21b is pressed, the monomulti 56 is triggered, and the NAND gate 57
opens, and the actuator 58 for opening the window operates. The power reset device 24 is a reset device that automatically resets the device when connected to a power source.

Since the present invention is constructed as described above, even if the unlock number is known to someone else, by increasing or decreasing the number of digits, they can illegally unlock the door, open the window, or open the trunk. It has the feature of reliably preventing the lid from being unlocked.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the present invention, and FIG. 2 is an electronic circuit diagram. Patent applicant: Nissan Motor Co., Ltd. Kokuki Metal Industry Co., Ltd.

Claims (1)

[Claims] A number setting device for inputting an arbitrary number to unlock the door; a stitch count circuit for counting the number of arbitrary numbers output from the setting device; and a stitch count circuit for counting the number of arbitrary numbers output from the setting device, and storing the number of digits of the arbitrary number to which the output of the counting circuit is applied. an arbitrary number digit number setting circuit; an arbitrary number storage circuit that stores the arbitrary number outputted from the digit number setting circuit and its number of digits; and a fixed number that is memorized to change the memory contents of the arbitrary number storage circuit. 1. An electronic lock device for an automobile, comprising a fixed number storage circuit, wherein the number of digits of the arbitrary number can be changed by inputting an arbitrary number after inputting the fixed number from the number setting device.