JPS6229558Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an unlocking device that performs an unlocking operation based on a coded signal from a signal input means having a required number of operating sections.

Conventionally, for example, in automobiles, a switch operation panel as a signal input means having a required number of operation parts is attached to the door, and the switch operation panel can be operated based on a coded code consisting of a preset series of numbers, etc. A so-called keyless unlocking device has been proposed in which an encoded signal is generated from the switch operation panel by operating a switch, and a door lock mechanism is unlocked based on the encoded signal.
However, with the above configuration, there was a fear that someone might be able to memorize the code if someone could spy on them while operating the switch operation panel.

The present invention has been made in view of the above circumstances, and its purpose is to provide an unlocking device that can eliminate the anxiety that someone else will memorize the code when operating the signal input means.

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

First, the schematic configuration will be described with reference to FIGS. 1 and 2. Reference numeral 1 denotes a switch operation panel (not shown) which is a signal input means attached to the door of a car, and has the required numbers, for example, "1", "2", "3",
Five operation parts 2a, 2b, 2c, 2d and 2e are provided with numbers "4" and "5" respectively, and these operation parts 2a, 2b, 2
Switches 3a, corresponding to c, 2d and 2e, respectively.
3b, 3c, 3d, and 3e are provided, and when the operating section is touched, the corresponding switch is turned on. In the switches 3a, 3b, 3c, 3d and 3e,
Each one end is grounded, and each other end is a detection wire 4a,,4
b, 4c, 4d and 4e, respectively.
Moreover, these detection lines 4a, 4b, 4c, 4d and 4e are input terminals Ia, Ib.Ic, Id and Ie of the judgment circuit 5.
are connected to the resistors 6a, 6b, respectively.
The negative terminal is connected to the grounded positive (+) terminal 7 of the battery through 6c, 6d and 6e, respectively. Therefore, the detection lines 4a, 4b, 4c, 4d
The signals of 4e and 4e are sent to the corresponding switch 3.
Normally, when switches a, 3b, 3c, 3d, and 3e are off, the level is high, but when the corresponding switches 3a, 3b, 3c, 3d, and 3e are turned on, the level becomes low. Detection line 4
a, 4b, 4c, 4d and 4e convert these low level signals into operation signals Sa, Sb, Sc, Sd and
Se. Further, the determination circuit 5 stores in advance an encrypted signal in which a plurality of five numbers are combined in chronological order, for example, "5, 4, 3, 2, 1",
Operation parts 2e, 2d, 2c, 2 of switch operation panel 1
b and 2a are touched in the same order, switches 3e, 3d, 3c, 3b and 3a are turned on in sequence, and thus "5", "4", "3", "2" and "1"
The operation signals Se, Sd, Sc, Sb and
When Sa is applied to the input terminals Ie, Id, Ic, Ib, and Ia, the drive signal _S5 , which is a high-level output pulse, is generated from the output terminal O. Thus, the output terminal O of the determination circuit 5 is connected to the first output terminal of the OR circuit 8.
The second input terminal of the OR circuit 8 is connected to the output terminal of the AND circuit 9, and the output terminal of the OR circuit 8 is a retriggerable monostable multivibrator which is a delay circuit. It is adapted to be connected to an input terminal of circuit 10. In this case, monostable multivibrator circuit 1
0 is configured to generate a delayed signal S 10 whose pulse width is a set time t seconds (for example, 1 second) triggered by the rising edge of the input pulse, and when the input pulse S ₁₀ is input while the delayed signal S ₁₀ is being generated. When a pulse is applied, it is retriggered each time the input pulse is applied to generate a delayed signal _S10 of t seconds from the time of retriggering. 11 is a NAND circuit, and its five input terminals are connected to detection lines 4a, 4b, 4, respectively.
c, 4d and 4e, and its output terminal is connected to the first input terminal of the AND circuit 9.
The output terminal of the monostable multivibrator circuit 10 is connected to the second input terminal of the AND circuit 9. Reference numeral 12 designates a monostable multivibrator circuit as an unlocking signal generating circuit, which is triggered by the falling edge of an input pulse to generate an unlocking signal _S12 having a pulse width of, for example, 1.5 seconds. In this monostable multivibrator circuit 12, an input terminal is connected to an output terminal of the monostable multivibrator circuit 10,
The output terminal is connected to the base of an NPN type transistor 14 via a resistor 13, and the emitter of the transistor 14 is grounded, and the collector is connected to the base of an NPN type transistor 14 via an electromagnetic solenoid 15 for unlocking the door lock mechanism (not shown). Connected to terminal 7. In FIG. 2, the determination circuit 5, the OR circuit 8, the AND circuit 9, the monostable multivibrator circuit 10, the NAND circuit 11, and the monostable multivibrator circuit 12 are shown separated by function. It consists of a microcomputer.

Next, the operation of this embodiment will be explained with reference to FIG. First, the user operates the operation sections 2e, 2d, 2c, 2b and 2 of the switch operation panel 1 based on the code number "5, 4, 3, 2, 1" which is the code code.
If you touch a in the same order, switches 3e,
3d, 3c, 3b, and 3a turn on sequentially to generate operation signals Se, Sd, Sc, Sb, and Sa in the same order, and therefore, the determination circuit 5 detects the time-series code of the operation signal input. signal “5, 4, 3,
2, 1'' and generates the drive signal _S5 as shown in FIG. 3b. This drive signal S ₅
is applied to the monostable multivibrator circuit 10 via the OR circuit 8, so the monostable multivibrator circuit 10 is triggered by the rising edge of the drive signal _S5 and generates the delayed signal _S10 as shown in FIG. 3c. and is applied to the monostable multivibrator circuit 12. Thereafter, if the user touches one of the operation parts 2a to 2e of the switch operation panel 1, for example 2a, within t seconds (for example, 1 second), the switch 3a is turned on. As a result, an operation signal Sa is generated, and in response to this, the NAND circuit 11 generates a high-level output pulse _S11 as shown in FIG. 3a. And at this time, monostable multivibrator circuit 1
Since the high level delay signal S ₁₀ of 0 is given to the AND circuit 9, the output pulse S ₁₁ of the NAND circuit 11 is given to the monostable multivibrator circuit 10 via the AND circuit 9 and the OR circuit 8. Therefore, the monostable multivibrator circuit 10 is retriggered by its rising edge,
By updating the delay operation, the delay signal _S10 is continuously generated as shown in FIG. 3c. Thereafter, if you touch any of the operation parts 2a to 2e of the switch operation panel 1 sequentially at intervals of t seconds (for example, 1 second) in the same way, a NAND circuit will appear each time as shown in FIG. 3a. 11 generates an output pulse S ₁₁ which is applied to the monostable multivibrator circuit 10, which is retriggered each time to continue the delayed signal S ₁₀ as shown in FIG. 3c. occurs. After that, for example, the NAND circuit 11 outputs the third output pulse.
If none of the operation parts 2a to 2e of the switch operation panel 1 are operated within t seconds after _S11 is generated, the monostable multivibrator circuit 10 ends its delay operation after t seconds. The delayed signal _S10 becomes low level as shown in FIG. 3c, and the monostable multivibrator circuit 12 is triggered by the fall of the delayed signal S10 to generate a high level unlocking signal _S12 as shown in FIG. 3d. . This unlock signal _S12 is applied to the base of the transistor 14 via the resistor 13, so the transistor 14
is turned on, the unlocking electromagnetic solenoid 15 is energized for a short time, and the door lock mechanism is unlocked.

In addition, if none of the operation parts 2a to 2e of the switch operation panel 1 are touched within t seconds from the time when the determination circuit 5 generates the drive signal _S5 , the monostable multivibrator is activated after t seconds have elapsed. When the circuit 10 completes its delay operation, the delay signal _S10 becomes low level as shown by the two-dot chain line in FIG.
This fall triggers the monostable multivibrator circuit 12 to generate an unlocking signal _S12 as shown by the two-dot chain line in FIG.

In this way, according to this embodiment, the code number "5,
The drive signal _S5 was generated from the determination circuit 5 by touching the operation parts 2e, 2d, 2c, 2b, and 2a of the switch operation panel 1 in the same order based on "4, 3, 2, 1". When any one of the operating sections 2a to 2e is sequentially touched within t seconds (for example, 1 second) after that, the monostable multivibrator circuit 10 is retriggered each time to generate a delayed signal.
S ₁₀ will continue to be generated, and during this time the monostable multivibrator circuit 12 will generate the unlock signal S ₁₂
Therefore, unlike the conventional system in which the unlocking operation is performed immediately when the determination circuit 5 generates the drive signal _S5 , the code number "5, 4, 3, 2, 1" on the switch operation panel 1 is The unlocking operation will not be performed while an unrelated touch operation is being performed after the touch operation based on ``'', and even if someone steals a look at the touch operations on the switch operation panel 1, the unlock operation will not be performed in any numerical order. The anxiety of being unable to determine whether a code is a code number and remembering the code numbers "5, 4, 3, 2, 1" is resolved.

Further, according to this embodiment, as described above, if a touch operation is performed on the switch operation panel 1 based on the code number "5, 4, 3, 2, 1" and then an unrelated touch operation is performed, the The monostable multivibrator circuit 10 is retriggered and continues to output the delayed signal.
_S10 , the user can perform unrelated touch operations as many times as desired, which reduces the possibility that the code number will be stolen and memorized by another person.
If an unrelated touch operation is performed before the "4, 3, 2, 1" touch operation, leakage of the code number can be reliably prevented.

In the above embodiment, a retriggerable monostable multivibrator circuit 10 is used, but a normal monostable multivibrator circuit 10 that cannot be retriggered may also be used. During the operation, touch operations unrelated to the code number on the switch operation panel 1 can be performed several times.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and may be applied not only to the door locking mechanism of a car but also to a door locking mechanism of a house, etc., as appropriate without departing from the gist. Of course, modifications can be made.

As explained above, the present invention includes a determination circuit that generates a drive signal when the operation signal from the signal input means is an encrypted signal based on operations of a plurality of predetermined operation units in a preset order. The configuration includes a delay circuit that performs a delay operation for a set time based on the drive signal from the determination circuit, and an unlocking signal generation circuit that generates an unlocking signal after the delay operation of this delay circuit is completed, so that the delay of the delay circuit is It is possible to provide an unlocking device that can perform operations unrelated to the code code of the signal input means during operation, and eliminates concerns that someone else will memorize the code code when operating the signal input unit.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a front view of a switch operation panel, FIG. 2 is a diagram illustrating the electrical configuration, and FIGS. 3 a to 3 d are waveform diagrams of various parts for explaining the operation. In the drawing, 1 is a switch operation panel (signal input means), 2a to 2e are operation sections, 5 is a determination circuit, 1
0 indicates a monostable multivibrator circuit (delay circuit), 12 indicates a monostable multivibrator circuit (unlock signal generation circuit), and 15 indicates an electromagnetic solenoid for unlocking.

Claims (1)

[Claims for Utility Model Registration] 1. A signal input means that has a required number of operation parts and generates an operation signal by operating the signal input means, and the operation signal from the signal input means is set in a plurality of predetermined operation parts. a determination circuit that generates a drive signal when the signal is encrypted based on the operation in the order of operations; a delay circuit that performs a delay operation for a set time using the drive signal from this determination circuit; An unlocking device comprising an unlocking signal generating circuit that generates a signal. 2. Claim No. 2 of the utility model registration, characterized in that the delay circuit is configured to perform the delay operation by updating the set time every time an operation signal is applied from the signal input means during the delay operation. The unlocking device according to item 1.