JPH045115B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric lock unlocking device configured to unlock a lock electrically.

BACKGROUND TECHNOLOGY In general, an electric lock/unlock device is configured so that when a predetermined password is input using a 10-key installed outdoors, an unlocking control section set indoors unlocks the electric lock. .

Problems to be solved by the invention However, with this lock, the unlocking operation part is
10 keys are used to input the PIN number, so once the PIN number is set, the key to be pressed is uniquely determined.
There was a problem in that the key was more likely to become dirty or worn out than other keys, making it much easier for other people to understand the password.

The present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and it is an object of the present invention to provide an excellent electric lock unlocking device that has a simple structure and does not allow others to notice the password.

Means for Solving the Problems The present invention provides a single key for inputting a PIN number, inputs a predetermined PIN number based on the duration of continuous pressing of that key, or the number of times the key is pressed, and then presses a separate set key. By operating the device, it is determined whether or not the entered password matches a preset password, and when the two match, the electric lock is unlocked.

Effects Therefore, according to the present invention, the key to be operated is always the same regardless of the PIN number, and even if dirt or scratches occur, this makes it easier to identify the PIN number. This is not the case at all, and is extremely advantageous in terms of crime prevention.

Embodiment The figures are electrical wiring diagrams of an embodiment of the electric lock/unlocking device of the present invention, in which Fig. 1 shows the unlocking operation section, and Fig. 2 shows how the electric lock is opened in response to a signal from the unlocking operation section. The unlocking control unit that unlocks the lock is shown.

In Fig. 1, S ₁ is a switch for entering a PIN number that is turned on and off by a single key for entering a PIN number, and OSC ₁ is an oscillation switch that operates when switch S ₁ for entering a PIN number is turned on. IC ₁ is a monostable multivibrator that is triggered by the output of oscillator circuit OSC ₁ and outputs a predetermined signal for a certain period _of time determined by resistor R ₁ and capacitor C ₁ . Monostable multivibrator IC ₁
IC ₃ is a decoder that decodes the output of up counter IC ₂ and drives the 7-segment numeric display LED ₁ .
OSC ₂ is an oscillation circuit that always oscillates at a predetermined frequency, IC ₄ is an AND circuit that ANDs the Q output of monostable multivibrator IC ₁ and the output of oscillation circuit OSC ₂ , C ₂ is a capacitor for DC cut, _L1 is a coil for AC cut, _S2 is a set switch that is turned on by operating the set key,
IC ₇ is an inverter, IC ₈ is an AND circuit that ANDs the output of monostable multivibrator IC ₁ and the output of the above inverter IC ₇ , IC ₉ is triggered by the output of AND circuit IC ₈ , resistor R ₆ , and capacitor. _C5
A monostable multivibrator that outputs a predetermined signal for a certain period of time determined by _Q2 is normally on, and turns off when a high level signal is output from the Q output terminal of monostable multivibrator IC ₉ . PNP transistor, Q ₃ is turned on and off by the output of transistor Q ₂ , IC ₂₂ and IC ₂₃ are NAND circuits forming a flip-flop circuit, and Q ₇ is turned on by the output of NAND circuit IC ₂₃ . , off-controlled transistors that drive the blinking dots DP in the numeric display LED ₁ , R ₇ , R ₈ ,
R ₉ , R ₁₀ , R ₂₅ , and R ₂₆ are transistors Q _{2 and} R 26 , respectively.
Bias resistance for Q ₃ and Q ₇ , R ₂₇ is a numeric display
The protection resistors for LED ₁ , R ₂₄ , D ₄ , and C ₁₁ are resistors, diodes, capacitors, a,
b is an output terminal of the unlocking operation section.

In Fig. 2, c and d are input terminals that receive signals from the unlocking operation section, _C3 is a capacitor for DC cut, and _Q1 is turned on and off by the signal input through capacitor _C3 . NPN
Transistors, R ₂ , R ₃ .R ₄ are bias resistors for transistor Q ₁ , R ₅ , C ₄ , IC ₅ are resistors for waveform shaping the output of transistor Q ₁ , capacitor, inverter, IC ₆ is for inverter IC ₅ . An up counter that counts the output, S ₃ , S ₄ , and S ₅ are switches for setting a PIN number in advance, and IC ₁₅ is a switch for setting the PIN number and the output of the up counter IC _{6 .} An exclusive OR circuit that compares the output corresponding to the above-mentioned password set in advance by S ₄ and S ₅ and outputs a predetermined signal when the two match, D ₁₈ , D ₁₉ , D ₂₀ , D ₂₁ are diodes that are connected to the output side of OR circuit IC ₁₅ and constitute a normal OR circuit, and IC ₁₆ is an inverter that will be described later.
A NAND circuit whose inputs are the output of IC ₁₁ and the outputs of the diodes D ₁₈ to _{D 21} , IC ₁₇ , IC ₁₈ are NAND circuits forming a flip-flop circuit, D ₂₂ , D ₂₃ ,
D ₂₄ is a diode that constitutes an AND circuit, and IC ₁₉ is a monostable multi-channel circuit that is triggered by the outputs of diodes D ₂₂ to D ₂₄ and outputs a predetermined signal for a certain period of time determined by resistor 15 and capacitor C ₉ . Vibrator, Q ₄ is monostable multivibrator IC ₁₉
R ₁₇ and R ₁₈ are bias resistors for transistor Q _{4, RY is an electric lock/unlock relay connected in series with transistor Q 4 ,} and ry is an NPN transistor that is controlled on and off by the Q output of Relay RY contacts, L ₂ is a coil for AC cut, D ₁ is a photocoupler, Q ₅ is a PNP transistor connected in series to photocoupler D ₁ , Q ₆ is an NPN transistor that controls transistor Q ₅ on and off, and an IC. _Ten ,
IC ₁₁ , IC ₁₂ , and IC ₂₀ are all inverters, and IC ₂₁ is a resistor.
R ₂₃ and a NAND circuit forming an oscillation circuit together _with capacitor C ₁₀ ; IC ₁₃ is an up counter that counts the output of inverter IC ₁₂ ; IC ₁₄ is a password setting switch S ₃ , S ₄ , A NOR circuit that selects one of S ₅ , C ₆ , D ₂ , and R ₁₂ selects one of the inverter ICs when the output of inverter IC ₁₀ rises.
A capacitor, diode, and resistor for giving a negative trigger signal to IC ₁₁ ; C ₇ , D ₃ , and R ₁₄ are capacitors, diodes, and diodes for giving a positive trigger signal to inverter IC ₁₂ when the output of inverter IC ₁₀ rises; Resistors, R ₂ , R ₃ , R ₁₇ , R ₁₈ , R ₂₀ , R ₂₁ are bias resistors, R ₁₁ is pull-up resistors, R ₁₄ , R ₂₈ , R ₂₉ , R ₃₀ , R ₃₁ are pull-down resistors. resistance, D ₅ to D ₁₇ are diodes for backflow prevention,
D ₂₅ is a diode for preventing reverse pulses in relay RY.

Next, the operation of the above embodiment will be explained.

In FIG. 1, it is assumed that a key for inputting a password is operated and switch _S1 is turned on. When the switch _{S 1} is turned on, the oscillation circuit OSC ₁ operates, and its output is applied to _the monostable multivibrator IC _{1 .} A high level is applied to the Q terminal for a certain period of time determined by _C1 .
A low level signal is output to each Q terminal.
When a high level signal is output to the Q terminal, it is applied to the up counter IC ₂ and counted. In other words, in this state, up counter IC ₂
The Q ₀ terminal becomes high level, the Q ₁ , Q ₂ , and Q ₃ terminals become low level, and this is applied to the 7-segment numeric display LED ₁ through the decoder IC ₃ , so the numeric display LED ₁ is First, "1" is displayed in this state.

Also, when a high level signal is output to the Q terminal of monostable multivibrator IC ₁ , this is input to the B terminal of AND circuit IC ₄ , so the oscillation circuit
The output of OSC ₂ is directly outputted to output terminal a via capacitor C ₂ and transmitted to input terminal c of the unlocking control section.

When the output of the oscillation circuit OSC ₂ is input to the input terminal c of the unlocking control section, it is first applied to the transistor Q ₁ via the capacitor C ₃ , and is then applied to the functions of the resistor R ₅ , capacitor C ₄ , and inverter IC ₅ . Therefore, while the output of the oscillation circuit OSC ₂ is being input to the input terminal c, the output of the inverter IC ₅ is at a high level.
Then, when the output of inverter IC ₅ becomes high level, this is counted by up counter IC ₆ .
That is, in this state, since only "1" is counted, the output of the up counter IC ₆ is such that the Q ₀ terminal is at a high level and the Q ₁ , Q ₂ , and Q ₃ terminals are at a low level.

Now, if the key for entering the password is pressed and the switch _S1 remains on, the oscillation circuit _OSC1 continues to oscillate. Therefore, monostable multivibrator IC ₁ resists
Even if the original state is restored after a predetermined period of time by R ₁ and capacitor C ₁ , the monostable multivibrator IC ₁ is immediately activated again by the output of the oscillation circuit OSC ₁ , The Q terminal of stable multivibrator IC ₁ becomes high level.

So, as before, up counter IC ₂
counts this and increases the count value by 1. That is, in this case, counter IC ₂
The Q ₁ terminal becomes high level, the Q ₀ , Q ₂ , and Q ₃ terminals become low level, and the numeric display LED ₁ displays "2". Then, the Q output of the monostable multivibrator IC ₁ causes the output of the oscillation circuit OSC ₂ to be applied again to the transistor Q ₁ of the unlocking control section via the AND circuit IC ₄ , capacitors C ₂ and C ₃ , etc. Then, the up counter IC ₆ also increments its count value by 1.

In this way, when the key for entering the password is pressed and the switch S ₁ is kept in the on state, the single constant multivibrator IC ₁ generates a signal every preset period of time by the resistor R ₁ and the capacitor C ₁ . The up counters IC ₂ and IC ₆ each increment their count value by 1, and at the same time, the value is displayed on the display.
Displayed by LED ₁ .

Now, with the count values of up counters IC ₂ and IC ₆ reaching "2" and this being displayed on indicator LED ₁ , release the PIN input key and press switch S ₁ . Suppose it is turned off. When the switch _S1 is turned off, the oscillation circuit _OSC1 stops oscillating at that point, and the input signal to the monostable multivibrator _IC1 disappears.

Therefore, the monostable multivibrator IC ₁ remains in that state for a certain period of time determined by the resistor R ₁ and the capacitor C ₁ and then returns to its original state. In this state, the counter IC ₂ IC ₆ stops counting up, and the display LED ₁ continues to display "2".

Next, in this state, it is assumed that the set key is operated to turn on the set switch _S2 . Set switch
When S ₂ is turned on, the output of inverter IC ₇ becomes high level, which is monostable multivibrator IC _1.
It is input to AND circuit IC ₈ together with the output of . Since the output of monostable multivibrator IC ₁ has already become high level, the output of AND circuit IC ₈ also becomes high level, and this is applied to monostable multivibrator IC ₉ . When a high level signal is input to the monostable multivibrator IC ₉ , a high level signal is output from the Q terminal for a certain period of time determined by the resistor R ₆ and the capacitor C ₅ , during which time the transistors Q ₂ and Q ₃ turns off. When the transistor _Q3 is turned off, the DC current that has been flowing through the transistor _Q5 , photocoupler _D1 , coil _L2 in the unlocking control section, coil _L1 in the unlocking operation section, and transistor _Q3 becomes zero, Photocoupler D ₁ is also turned off. Therefore, the output terminal of inverter IC ₁₀ becomes low level, and at the time of falling, a low level trigger signal is momentarily applied to inverter IC ₁₁ by the action of capacitor C ₆ , resistor R ₁₂ and diode D ₂ . A high level trigger signal is output to the output terminal.

In this state, the input terminal of inverter IC ₁₂ remains at low level, and up counter IC ₁₃
A high level signal is applied to the input terminal of. Therefore, the output terminal of up counter IC ₁₃
Q _A , Q _B , Q _C , and Q _D are all at low level, and the output terminal of NOR circuit IC ₁₄ is at high level. That is, in this state, a high level voltage is applied only to the first switch _S3 among the three switches _S3 , _S4 , _S5 for setting the password, and this switch _S3 The first digit of the preset password is compared with the output of the up counter IC ₆ .

Now, assume that the first digit of the password is set to "2" by switch _S3 , and contact b in switch _S3 is turned on.

In this case, the signals applied to each input terminal of the exclusive OR circuit IC ₁₅ are applied to the up counter IC _6.
The output of the exclusive OR circuit IC ₁₅ becomes low level. Therefore, in this case, as described above, a high level trigger signal is output from inverter IC ₁₁ , and even if this is applied to NAND circuit IC ₁₆ , the signal input from exclusive OR circuit IC ₁₅ is low level. Nando circuit ic for ₁₆
The output terminal of becomes high level.

Now, if the first digit of the password set by the switch _S3 is something other than "2", the signal applied to the exclusive OR circuit IC ₁₅ through the switch _S3 and the up counter IC. ₆ , the signals applied to the exclusive OR circuit IC ₁₅ are different from each other, and in this case, the output terminal of the exclusive OR circuit IC ₁₅ becomes high level. Therefore, in this case, when a high level signal is output from the inverter IC ₁₁ , a low level signal is output to the output terminal of the NAND circuit IC ₁₆ , and a high level signal is output to the output terminal of the NAND circuit IC ₁₇ . A low level signal is output to the output terminal of the NAND circuit IC ₁₈ .

And resistor R ₆ in the unlocking operation part, capacitor
After a certain period of time determined by C ₅ has elapsed and monostable multivibrator IC ₉ returns to its original state, transistors Q ₂ and Q ₃ are turned on again and photocoupler D ₁ is turned on, so at this point , the output terminal of inverter IC ₁₀ becomes high level, and resistor R ₁₄ ,
A high-level trigger signal is applied to the inverter IC ₁₂ by the functions of the capacitor C ₇ and the diode D ₃ . Therefore, a low level trigger signal is applied from the output terminal of the inverter IC ₁₂ to the CK terminal of the up counter IC ₁₃ , and the up counter IC ₁₃ increments its count number by "1". Therefore, in this state, the up counter IC ₁₃
The Q _A terminal becomes high level, the output terminal of the NOR circuit IC ₁₄ becomes low level, and a high level voltage is applied only to the second switch S ₄ that sets the second digit of the password.

In this way, after a high level voltage is applied to the second switch S ₄ for setting the PIN number, if you turn on the switch S ₁ for entering the PIN number, the same result as before will occur. In this way, the counter IC ₁ is turned up only while the switch S ₁ is on.
The count value of IC ₆ goes up and is displayed.
Therefore, by looking at the display, turning off switch _S1 at the desired value, and then turning on set switch _S2 again, the output of up counter IC ₆ and the above second switch _S4 will be used as before. The preset password numbers are compared, and depending on the result, the same high-level and low-level signals as before are output to the output terminals of the NAND circuits IC ₁₆ , IC ₁₇ , and IC ₁₈ . Then, continue with the up counter as before.
The count value of IC ₁₃ increases by 1, and the third password
A high level signal is applied to the third switch _S5 which sets the digit.

Therefore, if you then turn on the switch _S1 for entering the PIN, turn off the switch _S1 at the desired value, and turn on the set switch _S2 , the third digit of the PIN will be verified. be exposed.

In this way, when a 3-digit PIN code is input and it matches the preset PIN code, the output terminal of NAND circuit IC ₁₇ becomes high level, and the Q _B output of up counter IC ₁₃ also becomes high level. To become
Monostable multivibrator by these signals
A high level signal is output to the Q terminal of IC ₁₉ for a certain period of time determined by resistor R ₁₅ and capacitor C ₉ and transistor Q ₄ is turned on. Therefore, during this time, relay RY operates and the separately provided electric lock is unlocked. If the entered PIN does not match the preset PIN, the NAND circuit will
The output terminal of IC ₁₇ becomes low level, monostable multivibrator IC ₁₉ does not operate, and the electric lock cannot be unlocked.

By the way, if the input PIN number matches the preset PIN number, the monostable multivibrator IC ₁₉ will operate and a low level signal will be output for a certain period of time at the output terminal, so this signal will trigger the NAND circuit. IC ₁₈ and IC ₁₇ are reset. and,
At the same time, that signal is applied to the inverter IC ₂₀ , so the output terminal of the inverter IC ₂₀ becomes high level for the above-mentioned fixed period of time, and the oscillation circuit consisting of the resistor R ₂₃ , the capacitor C ₁₀ , and the NAND circuit IC ₂₁ oscillates for the above-mentioned fixed period of time. It turns out. Therefore, the transistors Q ₆ and Q ₅ are turned on and off by the output of this swing circuit, and the power supply to the unlocking operation section is turned on and off.

When the power is turned on and off at the unlocking operation part, the monostable multivibrator is activated while the power is on.
The Q terminal of IC ₁ becomes high level, and the NAND circuit
The output of IC ₂₂ becomes low level, and the output of NAND circuit IC ₂₃ becomes high level. Therefore, this turns on the transistor _Q7 and lights up the dot display DP in the character display LED ₁ . Then, when the power is turned off, the display DP turns off, so the display DP ends up repeating blinking.

In this way, when the entered PIN number matches the preset PIN number, the resistor R ₁₅ and the capacitor C ₉
The dot display DP repeatedly flashes for a certain period of time determined by the above, indicating that the above-mentioned password matches. Then, when the above-mentioned certain period of time has passed and the monostable multivibrator IC ₁₉ returns to its original state, the oscillation circuit consisting of the resistor R ₂₃ , the capacitor C ₁₀ , and the NAND circuit IC ₂₁ stops its oscillation, and the transistors Q ₆ , Turn on _Q5 . Therefore, at that moment, from the connection point of resistor R ₂₄ and capacitor C ₁₁ , a NAND circuit is formed.
A low level signal is input to the input terminal of the NAND circuit IC ₂₃ , the output terminal of the NAND circuit IC ₂₃ is at a high level, the transistor _Q7 is turned on, and the dot display DP remains lit.

When the switch S ₁ for inputting the PIN is turned on, the terminal of the monostable multivibrator IC ₁ becomes low level as described above, so the output terminal of the NAND circuit IC ₂₂ becomes high level, and the NAND circuit
The output terminal of IC ₂₃ becomes low level. Therefore, in this case, transistor _Q7 is turned off and dot indicator DP is turned off. Therefore, it is possible to display the input state of each digit of the password and the subsequent operation state of each circuit.

So far we have explained the detailed operation of the circuit, but to explain the circuit in blocks, when the PIN input key 1 is turned on, the counting means 2 counts, the value is displayed on the display means 3, and the desired value is displayed. When the value is obtained, set key 4
is turned on, and the comparison means 6 compares the value preset by the password setting means 5 with the value set in advance by the password input key 1.
The values input in are compared, and when they match, the unlocking means 7 unlocks the lock.

In this way, according to the above embodiment, there is only one key 1 for entering the password, and the password is set by the time the key is pressed or the number of times the key is pressed, so that the desired password can be set. There is no possibility that the PIN number can be discovered, which is extremely advantageous in terms of crime prevention.Furthermore, the PIN number is verified one digit at a time, and the overall circuit configuration is relatively simple, making it extremely advantageous in practice. It is. Also,
Number of PIN input key 1 and PIN setting means 5
When the numbers set in match, the display DP will flash, allowing you to visually check whether the lock can be unlocked or not. This has the effect that it is possible to easily determine whether the lock is broken or the mechanical lock is broken.

In addition, in the above embodiment, the switch for setting the PIN number is
Although S ₃ , S ₄ , and S ₅ are provided for only three digits, it is possible to have more or less than that. Furthermore, in the above embodiment, the oscillation circuit OSC ₁ is used and the count values of the counters IC ₁ and IC ₆ are automatically incremented by 1 if the switch S ₁ for inputting the password is kept on. Switch for entering PIN number
It is also possible to configure the count up by one each time _S1 is turned on.

Effects of the Invention As is clear from the above embodiment, the present invention uses one key for inputting a password, and inputs a desired password depending on the time the key is pressed or the number of times the key is pressed. Because of this structure, the chance that the desired password number is discovered by another person is extremely reduced, which is extremely advantageous in terms of crime prevention. In addition, when the number on the PIN input key matches the number set on the PIN setting means, the second display means flashes, so you can visually check whether the lock can be unlocked or not. When repairing, a technician can easily determine whether the electrical operation section or control section is broken, or whether the mechanical lock is broken, which is extremely advantageous in terms of maintenance and service. have an effect.

[Brief explanation of drawings]

FIG. 1 is an electrical wiring diagram of an unlocking operation part of an embodiment of an electric lock/unlocking device of the present invention, and FIG. 2 is an electrical wiring diagram of an unlocking control part of the same embodiment. S ₁ ...Switch for entering the password, S ₂ ...Switch for setting, OSC ₁ , OSC ₂ ...Oscillator circuit,
IC ₁ , IC ₉ , IC ₁₉ ... Monostable multivibrator,
IC ₂ , IC ₆ , IC ₁₃ ... Counter, IC ₃ ... Decoder,
IC ₄ , IC ₈ ...AND circuit, IC ₁₄ ...NOR circuit,
IC ₅ , IC ₇ , IC ₁₀ , IC ₁₁ , IC ₁₂ , IC ₂₀ ... Inverter, IC ₁₅ ... Exclusive OR circuit, IC ₁₆ ,
IC ₁₇ , IC ₁₈ , IC ₂₁ , IC ₂₂ , IC ₂₃ ...Nand circuit,
LED ₁ ...Numeric display, DP...Dot display,
RY...Relay, D ₁ ...Photocoupler.

Claims (1)

[Claims] 1. One key for inputting a PIN number, a counting means for counting a value proportional to the continuous operation time or number of operations of this key as a PIN number input by the above key, and a PIN number input by the counting means. a first display means for displaying the set value, a set key, and a separate password setting means for setting the value counted by the counting means when the set key is operated. a comparing means that outputs a predetermined signal when the two match, an unlocking means that unlocks the electric lock based on the output of the comparing means, and a key-input value and the above-mentioned password setting. An electric lock/unlock device comprising: second display means for displaying when the value set by the means matches the value set by the means.