JPS583116B2 - electronic locking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic locking device using touch input.

Electronic locking devices that have been proposed in the past use multiple push buttons or keyboards for the code input section, making them relatively large in size and difficult to install on residential doors, etc. There were some flaws that detracted from the design.

Further, the operation of such push buttons or keyboards is complicated and has low reliability.

The present invention provides one touch switch in the code input section,
This input is displayed on the display section for operation, thereby providing a useful electronic locking device that eliminates the drawbacks of the conventional electronic locking device.

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

FIG. 1 shows a block diagram of the main parts.

Reference numeral 1 designates a touch switch of the code input section, which touches electrodes a and b at the same time and bridges electrodes a and b with the human body to cause a resistance change.

Note that the touch switch may be one that causes a capacitance change with respect to ground by touching an electrode.

In this case, only one touch electrode is required.

2 is a touch detection circuit that detects touch input.

3 is a clock pulse generation circuit, which always has a constant frequency (1~
2Hz is appropriate) pulses are generated.

A gate circuit 4 inputs the outputs of the touch detection circuit 2 and the clock pulse generation circuit 3, and supplies pulses of a constant frequency to the counting circuit 5 while detecting a touch input.

Reference numeral 6 denotes a display device for displaying the count contents of the counting circuit 5, and the count output is also supplied to the verification circuit 7.

8a, 8b, 8c are cryptographic preset circuits, here 3
I am trying to preset the digit code value.

9 is a code preset circuit 8 based on the verification output of the verification circuit 7.
This is a selector circuit that sequentially scans the outputs of a, 8b, and 8c.

10 is a code matching memory circuit which outputs an output when all the codes match.

11 is an unlocking device drive circuit, and 12 is an error detection circuit.

Reference numeral 13 denotes a monostable multi-channel circuit that enables the verification circuit 7 and the error detection circuit 12 to operate for a certain period of time after the touch operation is completed.
Reference numeral 4 denotes a monostable multifunction device that resets the code matching memory circuit 10 after a certain period of time after the code matching memory circuit 10 receives an output.

Now, the encryption of the encryption preset circuits 8a, 8b, 8c, etc. is performed using digital switches as shown in FIG.

In FIG. 2, 15 is a dial with numerical values from 0 to 9 written on it, and 16 is a small window for confirming set values.

When the dial 15 is turned left and right, the numbers 0 to 9 will appear continuously in the small window 16, and when any number is selected and set using each digital switch, it will be converted into a binary code and sent to the code preset circuits 8a, 8b, 8c. The code value is preset.

The code can be easily changed by turning the dial 15 again.

For example, assume that "7" is preset in the first cipher preset circuit 8a.

When the touch switch 1 is touched with a finger or the like, the touch detection circuit 2 detects the touch input, and while the touch switch 1 is being touched, a constant frequency pulse is input to the counting circuit 5 through the gate circuit 4.

The counting circuit 5 counts this number of pulses and displays it on the display device 6.

When the display increases in the order of "0", "1", "2", etc. and when "7" is displayed, when you release your finger from the touch switch 1, the pulse supply from the clock pulse generation circuit 3 is cut off, and the pulse supply from the clock pulse generation circuit 3 is cut off. stops after counting "7".

Thereafter, the verification circuit 7 becomes operational based on the output of the monostable multi 13, and verifies the counting result of the counting circuit 5 and the contents of the first cipher preset circuit 8a.

If there is a match, the match is stored in the code match memory circuit 10.

The matching output of the matching circuit 7 is inputted to the counting circuit 5 and the selector circuit 9, resets the counting circuit 5, and scans the selector circuit 9 to the second cipher preset circuit 8b in preparation for the next touch input.

In the same way, the second and third touch inputs are performed and the verification circuit 7
If a matching output is output from cipher matching memory circuit 1
0 detects that all the codes match, and operates the unlocking device drive circuit 11 through the monostable multi 14.

At the same time, the code matching memory circuit 10 is reset by the output of the monostable multi 14 to prepare for the next unlocking operation.

When a mismatch output is output from the verification circuit 7 during touch input, the error detection circuit 12, which can operate with the output of the monostable multi 13 similarly to the verification circuit 7, detects an error in the touch input at that point. Ru.

Although the output of this error detection circuit 12 is not shown,
It is used to drive an alarm to prevent theft, reset all circuits for touch input again, and disable circuits for a certain period of time to notify the user.

In the following embodiments, a case where a three-digit code is set has been described, but the code can be set to any number of digits including a one-digit case.

Note that if the code has multiple digits, the display device 6 may display all of the digits; A digit is sufficient, and from the standpoint of miniaturization, it is preferable to display a single digit sequentially in accordance with touch input.

Further, the error detection circuit 12 is connected to the code matching memory circuit 10.
The error may be detected after all matching outputs have been stored.

In this way, according to the present invention, only one or two touch electrodes and a display are exposed to the outside, so that the design of the attached article is not compromised due to miniaturization, and the range of application of the attached article is expanded. be able to.

In addition, the device can be operated simply by touching the touch electrode, which eliminates the hassle of operation and improves reliability.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a main part showing an embodiment of the present invention, and FIG. 2 is a plan view of the main parts. 1...Touch switch, 2...Touch detection circuit, 3...
Clock pulse generation circuit, 4...gate circuit, 5...counting circuit, 6...display device, 17...verification circuit,
8... Encryption preset circuit, 10... Encryption matching memory circuit, 11... Unlocking device drive circuit, 13... Monostable multi.

Claims (1)

[Claims] 1 Touch input means, means for generating pulses of a constant frequency, means for counting the pulses of the constant frequency while the touch input is present, means for displaying the counted content of the pulses, and means for detecting the end of the touch input operation. means for measuring a predetermined time, means for presetting a coded value in advance, and means that becomes operational in response to detection of the end of the touch input operation and collating the result of counting pulses due to the touch input with the preset coded value; An electronic locking device comprising: