JPS6019392B2 - Automotive electronic lock device - Google Patents

Description

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

Conventionally, in a push button switch type electronic lock device in which the door lock is unlocked or locked by a push button switch provided on the outside of the automobile, for example on the door, the number of digits of the scale lock number is, for example, 5 or 5. Because the number of digits was fixed and stored, such as 6, the number of digits could not be changed, so there was a risk of unauthorized unlocking.
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.

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

The control device for the electronic lock has a push-button number setter 10 of a known type that is composed of a large number of switches, and the output signal from the number setter 10 is transmitted through a data counting circuit 11, a fixed number comparison circuit 12, and is sent to the arbitrary number comparison circuit 13 and gate circuit 16. The counting circuit 11 counts the output of the number setter 10 and outputs the counting signal to the fixed number storage circuit 14 and arbitrary number storage circuit 15 as an address signal. The fixed number storage circuit 14 and arbitrary number storage circuit 15 each use a ROM and a RAM in the embodiment, and provide outputs to the fixed number comparison circuit 12 and arbitrary number comparison circuit 13. 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 receives double signals from the number setter 10 and the arbitrary number storage circuit 15, compares them, and when they match, sends a lock signal to the door lock actuator 17 as a lock. Send out. The reset signal generation circuit 18 receives signals from the counting circuit 11 and the fixed number comparison circuit 12, generates an output at an appropriate timing, and resets the counting circuit 11. The arbitrary number digit number setting circuit 19 operates based on the signal from the fixed number comparison circuit 12, and the counting circuit 1 operates in response to the input from the number setting device 10.
An arbitrary number digit number is memorized by the signal from 1. Then, when the scales are locked, the arbitrary number currently stored from the arbitrary number storage circuit 15 is outputted to the arbitrary number comparison circuit 13, a comparison is made using the set number of digits, and if the comparison is correct, an unlocking signal is issued. . A detailed circuit diagram of the electric lock is shown in FIG. In the switch group 21 composed of a plurality of push button switches 21a to 21e, numbers 1 to 5 are attached to each push button, and when the push button is 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 number setter. The output of the OR gate 23 is applied to the delay circuit 25,
If the bush button is not pressed within a certain period of time (for example, 5 seconds), a signal is generated, which is transmitted through the OR gate 26 to the shift registers 40 and 41 and the flip-flops 44 and 46.
is reset, and address counter 27 is also reset via OR gate 28. The output of the number setter is
The signal is applied to a counting circuit composed of an OR gate 23 and an address counter 27. This address counter 27 is
Up/down counter, RAM35 and RO (described later)
Generates an address signal to M37. Therefore, the address counter 27 counts the signal generated each time the bush button switch group 21 is opened. The output of the address counter 27 becomes the address input of the RAM 35 which is a number storage circuit and the ROM 37 which is a fixed number storage circuit, and the outputs of the RAM 35 and ROM 37 are given to comparators 38 and 39, respectively. These comparators 38 and 39 have bush button switches 2
Outputs 1a to 21e are given. Therefore, comparator 3
8 sequentially compares the push button switch input with each digit of an arbitrary number, and a comparator 39 sequentially compares the push button switch input with each digit of the fixed number. When the push button switch is pressed once, the comparator 39 compares this signal with the contents of the ROM 37, and when the two match, it generates a match signal, sends it to the gate input G of the shift register 41, and shifts. Output terminal of register 41○,
A signal is generated. When the seven signals generated by selectively pressing the push button switches No. 1 to 5 seven times are all equal to the seven (7 digits) signals stored in the ROM 37, the output of the shift register 41 Signals are generated at all terminals .about.07, AND gate 43 is opened, and RS flip-flop 46 is set. By setting the RS flip-flop 46, a Q signal is generated, which sends a reset signal to the shift register 40 and flip-flop 44 through the OR gate 45, thereby resetting them. Furthermore, the output of the RS flip-flop 46 is stored in the RAM 35.
is shifted to the "write" state and the gate circuit 36, which is formed by a gate such as an SCR, is opened so that the push button switch input is stored in the RAM 35. Also, since the value of address counter 27 is 7,
A signal is generated at the 07 terminal of the value detection circuit 33, making one terminal of the AND gate 32 high, but since the output of the RS flip-flop 46 is applied to the other terminal of the AND gate 32, the AND Gate 32 opens and OR
The address counter 27 is reset through the gate 29 and 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 output of the RS flip-flop 46 causes the shift register 40 and the RS flip-flop 44 to be in a reset state and do not operate. When the push button switches 21a to 21e are pressed, for example, 5 times to memorize an arbitrary number and 5 outputs are generated, the address counter 27 counts 5, and if the next push button is not pressed for a certain period of time or more, a delay occurs. 25 is activated and the address counter 2 is output through OR gate 26 and OR gate 28.
7 is reset and at the same time, the value 5 is registered in the digit counter 34. At this time, an output from the terminal 0m' of the value detection circuit 33 is generated, and a Q signal is generated at the RS flip-flop 46, so an output signal is generated at the AND gate 31, and this signal is sent to the AND gate 48. , AND gate 48 opens, the signal is sent through the OR gate 47 to the reset terminals of the shift register 41 and the RS flip-flop 46, and is reset. Therefore, since the Q signal of the RS flip-flop 46 is not generated, the gate circuit 36 is closed, and the RAM 35 switches from "writing" to "reading" state, and the storage of the arbitrary code is completed. When the pushbutton switches 21a to 21e are pressed in the correct order by the number of digits recorded, the switch signal is sent to the comparator 38, where the switch signal and the arbitrary signal stored in the RAM 35 are combined with the address of the address counter 27. The signal is compared according to the signal from the digit counter 34. When all n digit (n) signals match, all terminals 〇, ~0n of the shift register 40 become days, the AND gate 42 opens, and the RS flip-flop 44 turns on. This setting generates an output at the Q terminal of the RS flip-flop 44 and triggers the monomulti 53, so the door scale lock actuator 55 is activated and unlocked through the inverter 54.Flip-flop 44 Simultaneously with the setting of , the AND gate 30 is opened by the output of this flip-flop and the 0n terminal of the value detection circuit 33, and the address counter 27 is reset through the OR gates 29 and 28. In this state,
Pressing the second pushbutton switch 21b triggers the monomulti 56, opens the NAND gate 57, and activates the window actuator 58. 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 scale lock number is known to another person, it is possible to illegally unlock the door or open the window by increasing or decreasing the number of digits. It has the feature of reliably preventing the trunk lid from being unlocked.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the present invention, and FIG. 2 is a schematic diagram of an electronic circuit. 10...Number setter, 12...Fixed number comparison circuit, 13...Arbitrary number comparison circuit, 14
...Fixed number storage circuit, 15...Arbitrary number storage circuit, 19...Arbitrary number digit setting circuit. Figure 1 Figure 2

Claims (1)

[Claims] 1. A number setter for entering the number to unlock the door,
a fixed number storage circuit that stores a fixed number; a fixed number comparison circuit that outputs a signal when the fixed number input from the number setting device matches the fixed number stored in the fixed number storage circuit; An arbitrary number storage circuit that enters a write state when a signal is output from the number comparison circuit and stores the arbitrary number set by the number setting device, and registers the number of digits of the arbitrary number stored in the arbitrary number storage circuit. an arbitrary number digit number setting circuit; and when an arbitrary number is input from the number setting device, the arbitrary number signal is transmitted to the arbitrary number stored in the arbitrary number storage circuit and the number of digits registered in the arbitrary number digit number setting circuit; An electronic lock device for an automobile, comprising an arbitrary number comparison circuit that outputs an unlocking signal when a match is found.