JPS58135275A - Electronic lock - 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 that can be used, for example, in a safe.

Various types of locking devices have already been proposed in which the lock is unlocked by inputting a preset code number using a numeric keypad or the like. While entering the number, it is possible for someone else to easily remember the PIN number by observing the input operation, which has the effect of lacking reliability as a lock device.

Further, according to the above-mentioned conventional lock device, once the PIN number is entered incorrectly, it is necessary to reset all inputs and then re-enter the correct PIN number, which is inconvenient to operate.

SUMMARY OF THE INVENTION An object of the present invention is to provide a highly reliable 'ζ electronic lock that makes it difficult for another person to read and understand the recitation number even if the input operation of the recitation number is observed by another person.

Another object of the present invention is to provide an electronic lock that is easy to operate by enabling the lock to be unlocked by subsequently inputting the correct code without any re-cent operation (even if the code number is entered incorrectly). Our goal is to provide the following.

The present invention will be explained below with reference to illustrated embodiments.

In FIGS. 1 and 2, the door 2 provided on the front of the safe body 1 is rotatable about the hinge on the right edge of the safe body 1. /c is supported. The door 2 is provided with a handle 4 for protruding and retracting the bolt 3 from the upper and lower surfaces and side surfaces of the door 2, and a handle 40 is provided next to the handle 4.
A lock 5 is provided to prevent rotational operation and to permit rotational operation, and an insertion opening 6 into which a selector 7, which forms part of the electronic lock, is inserted is provided next to it. ing. A cord 8 is pulled out from the safe body 1 to connect the electronic lock to the ypyx alternating current power source.

In FIG. 3, the selector 7 has a numeric keypad 9, an enter key 10, etc., and has a mounting chamber 1 for the battery 11 on the side.
2 is provided. The selector 71 may be powered by the battery 11K, the safe body 1, or a separate AC power source. The selector 7 also has a limit switch 13 at its tip, and the limit switch 13 is activated when the selector 7 is inserted into the insertion opening 6 of the safe. Further, it is assumed that the selector 7 has a large number of contacts that come into contact with the large number of contacts on the main body of the safe when the selector 7 is inserted into the insertion opening.

In FIG. 4, a rotation plate 15 is integrally provided at the rotation @ 14 of the handle 4, and the base end of each of the gaps 3 is pivotally attached to the rotation plate 15. , when the handle 4 is rotated clockwise in the figure, each spacer 3 moves vertically and to the right, and their tips protrude from the upper and lower end surfaces and side surfaces of the door 2 and engage with the safe body 1, The door 2 cannot be opened. A notch 16 is formed at the peripheral edge of the rotary plate 15, and a stopper 1 is inserted into this notch 16.
7 advances, the rotation range of the rotation plate 15 is limited □, so that the range of movement of 4 of 3 between each gap is sufficient for its tip to protrude from the end face of the door and to retract. It is now limited to a certain range. Further, a projection 18 is formed on a part of the periphery of the rotating plate 15, and in the illustrated state, the plunger 20 of the electromagnet 19 provided on the side of the rotating plate 15 advances onto the path of the protrusion 18. In this state, the door 2 is prevented from being opened by the bolt 3 and the rotating plate 15 is prevented from rotating, that is, it is in a locked state. Plunger 20
A limit switch 21 is disposed at the lower ZK, and when the plate 15 is rotated counterclockwise in the figure, its protrusion operates the limit switch 21.

Since this limit switch 21 detects whether or not the electromagnetic switch 7:, i9 is activated, it may be configured to detect the movement of the plunger 20. Also, plunger 2
0, and in turn, the electromagnet 19Vc may be subjected to a large force due to the rotating operation of the handle 4. Therefore, the plunger 20K is connected to another member, and by this member the protrusion 18
(1° As shown in Fig. 5, the door 2 of the safe can be opened and closed.
A battery installation chamber 23 with 22 is provided, and the battery 24 installed in this installation chamber 25 may be used as a power source for the main body of the safe, or as a backup in case of a power outage.

Next, an example of an electric circuit used in the present invention will be explained.

Figure 6 shows an example of the source circuit inside the safe.
The AC power introduced from C) is stepped down by a transformer T, then rectified by a bridge rectifier circuit BD, and then supplied as a DC power VCC via a predetermined smoothing circuit, stabilizing circuit Re, and limit switch LS). It has become. The limit switch LS is a switch that is turned on by being inserted into the insertion slot 6 of the selector 7ya1' safe.

FIG. 7 shows the circuit 25 inside the selector 7 and the circuit 26 around the safe body. In the figure, ■ to ■
indicates the numeric keypad 9, and when these numeric keys are selected and operated, the corresponding switches are turned on, and the diode matrix circuit 27 outputs a 4-bit binary digital signal, which is temporarily stored in the latch circuit C1. It is supposed to be done. The latch circuit C1 constitutes a part of the storage device, and the latch circuit C4
In addition, latch circuits C2 to C7 are arranged in parallel to form a seven-digit storage device as a whole, and the signals generated each time the ten keys are pressed one by one are stored in each of the launch circuits C4 to C7.
By inputting the latch signal □ in the latch circuit of the lower digit to the latch circuit of the higher digit, the latch signal □ is sequentially shifted to the latch circuit of the higher digit. The launch signals of each latch circuit C1 to C7 are Q. P of comparators op1 to CP from the output terminals. ~P
It is designed to be input to 3 input terminals. When the enter key 10 is pressed, the corresponding switch is turned on, and the off circuit 0R4 (hereinafter, the off circuit will be referred to as "O
The signal ``■'' is inputted to the IN terminal of the comparator CP1 through the terminals ``R1'' and ``OR2''.

There is a 7-digit digital switch D8° to "D8" in the circuit next to the safe.
Each digital switch D81 to D7 is designed to output a 4-bit digital signal using a binary system, and a numerical value can be set in advance. .Each digital switch Ds1 to Dg
The output signal of 7 is the insertion slot 6vc selector 7 in the safe.
The input terminal B of each comparator cp to cp in the selector 7 is inserted through a predetermined contact. It is designed to be input to B3 through B3. Kon・
(Later CP.

Compare the signals from the digital switches Ds1 to Ds7 with the signals from the latch circuits C4 to C7, respectively, and only when the numerical values of all digits match, comparator C
The rHJ signal input to the IN terminal of
output from the Q terminal of the flip-flop circuit FF, (
Below, regarding flip-flop circuits, "FF1" and "F
F2") is input to the preset terminal PR. FF, is the PR terminal vc [a
When the J times signal is input, the rHJ signal is output from the terminal Q, and the transistor Tr is turned on, the relay coil C1 is energized, and the a contact R1 is turned on, and the contact s1 is turned on. Through s2'v, the electromagnet 19 is excited.

Both signals from FF are input to the PR terminal of FF2, and both signals are output from the Q terminal of FF2. Both signals are introduced to selector 7 through the contact, and 0R2Y: and each latch circuit C1 to C7
The signal is input to the glue nut terminal R8TK, and the memory of each latch circuit is erased.

The terminal OL of FF, FF2 is designed so that a signal is input from the initial seven-bit circuit IR through 0R3Y. Furthermore, the signal from the limit switch 21 is connected to FF1. It is a trap so that the terminal CLK of FF2 is input. This is when the power is turned on.
and FF when the electromagnet 19 is activated and unlocked.

This is to prevent malfunction by setting the output of the Q terminal of FF2 to "0".

Press Enter key ~ 10, the rHJ signal generated by the lever is input to the terminal PRK of FF4, and the rHJ signal is input from the terminal Q to the terminal PRK of FF4.
A signal is now output. This rHJ signal is input to the 7-nd circuit ANDK, and the AND circuit AND allows the pulse signal of a constant frequency output from the oscillation circuit OSa to pass therethrough and inputs it to the terminal GK of FF3.
It has become. FF operates as a kind of timer, and when it counts the incoming pulses and reaches a predetermined count value, Q. Output rHJ signal from terminal, OR2
Reset terminal R5 of each latch circuit C1 to C7 via
It is designed to be input to T. The rHJ signal generated by pressing one of the numeric keys is input to the CLK terminal of each latch circuit C7 to C7 as described above, and also to the F
It is also input to the OL terminal of F5, and the FF
Output of Q10 terminal of 3'! k rOJ K.

In the circuit configured as described above, assume that a predetermined set value is designated by sequentially pressing the numeric keypad, and finally an enter key is inserted. Numerical signals from the matrix circuit 27 are temporarily stored while being shifted sequentially from the latch circuits C1 to C2, C3, . . . C7. At this time, if the above key operation is performed while the selector 7 is attached to the safe, the digital signals from each latch circuit C4 to C2 and the digital signal from each digital switch Dat to Da7 are transferred to a comparator CP1. CP to CP, and when the comparison matches in all digits, the rHJ signal generated by the operation of the enter key passes through each comparator CP to CP7 to the Q of comparator CP7.
The signal is output from the terminal, and based on this, the electromagnet 19 is excited as described above. When the electromagnet 19 is excited, the plunger 20 in Figure 4 is attracted and the protrusion 1 of the rotating plate 15
The plunger 20 is retracted from the passage B, and the rotating plate 15 is rotated by operating the handle 4, so that each gap 3 can be retracted from the end face of s2 and the door can be opened. Note that when the electromagnet 19 is excited, the rHJ signal is output from the Q terminal of FF2, and each comparator CP1 to CP, Fc'
Set lJ. The limit switch 21 is actuated by the rotation of the rotating plate 15, and the rHJ signal generated thereby is inputted to the terminal OL of FF1°FF2 through 0R3Y. The output of the terminal Q of FF2 is set to "0", and the excitation of the electromagnet 19 is cut off. From this point K, the plunger 20 attempts to return to its original position, but is prevented from returning by the protrusion 18 of the rotating plate 15. When the rotating plate 15 returns to its original position by operating the handle 4, the plunger 20 It returns and becomes locked.

If the numeric keypad and enter key operations as described above are performed with the selector 7 removed from the safe,
From each launch circuit C4 to C7 to comparator CP, or
It is the same as the above case that the latch signal is input to ap, but if the selector 7 is left inserted into the insertion slot 6 of the safe, the rl (J signal FF3 starts operating as a timer from the time when is input to the terminal PR of FF4, and after a predetermined period of time, a "fall" signal is output from the QIO terminal of FF, and based on this signal, each latch circuit C4 to G is activated. 7) Even if the selector 7 is attached to the safe after it has been opened, the safe will not be unlocked. Therefore, in this case,
You will have to use the numeric keypad again.

The reason for having such a function is that once the numerical values are memorized by operating the numeric keypad, they will not be erased forever (if they remain, it will be effective as an electronic lock).

This is because the number of deaths will be reduced.

Further, when the selector 7 is removed from the safe, the ten keys are operated, and then the selector 7 is inserted into the safe, there is no need to operate the enter key. That is, the limit switch 1 that operates when the selector 7 is inserted into the safe
This is because the output signal is input to the IN terminal of the comparator CP via OR, '&, and the result is the same as when the enter key is operated.A circuit with such a function The reason for this configuration is that comparators CP1 to cp cannot perform comparison operations until selector 7 is inserted into the safe, so it is meaningless to input the rHJ signal to the IN terminal of comparator cp at this point. Instead, when the selector 7 is inserted into the safe, the enter key is not operated (this is to ensure that the predetermined operation is performed immediately).

Although in the embodiments described above, the selector 7 is configured to be separate from the safe, the selector 7 may be incorporated into the safe, as shown in FIGS. 8 and 9. 8th
In Figure 9 and Figure 9, a door 2 that can be opened and closed on the safe body 1 is provided with an opening/closing handle 4, a cylinder lock 5, and a combination lock 28. is provided with an opening/closing lid 29, and when the lid 29' is turned four times to open, the selector 7 comes out.

According to this embodiment, since the selector 7 is built into the safe, the circuit serving as the selector 7 and the circuit of the safe can be directly connected without being connected through contacts or the like.

According to the present invention, the storage device, the digital switch, and the comparator are provided for a plurality of digits, and the storage device is configured to sequentially shift the digital signal input by operating the operation key to the storage device @VC of the adjacent digit. , the comparator is
It is configured to output an unlock signal when the digital signals of the storage device and digital switch for each corresponding digit match, so when entering the recitation number using the operation keys, it is possible to input the recitation number using the operation keys. Even after entering an arbitrary number, the lock can be unlocked by continuing to enter the predetermined PIN number. Therefore, if you enter a random number before entering the predetermined PIN number, someone else who is watching the key operations will be able to read the correct PIN number and not let go. can be provided. Furthermore, even if a user makes a mistake while entering a predetermined PIN number, the lock can be unlocked by continuing to enter the correct number without performing a reset operation, thereby providing an easy-to-operate electronic lock. be able to.

The driving device that constitutes a part of the electronic lock may be a real vehicle as shown in the drawings. Further, the electronic lock of the present invention can be used as a locking device for all kinds of things other than safes.

[Brief explanation of drawings]

Fig. 1 is an external perspective view showing an example of a safe having the device of the present invention, Fig. 2 is a perspective view showing another embodiment of the above safe with only the door section, and Fig. 3 is only the selector section used in the above safe. FIG. 4 is a perspective view showing the internal structure of the safe, FIG. 5 is a perspective view of a part of the front side showing another example of the safe, and FIG. 6 is a perspective view showing the present invention. FIG. 7 is a line diagram showing an example of a digital circuit used in the present invention, and FIG. 8 is an external perspective view showing another example of a safe having the device of the present invention. FIG. 9 is a partial perspective view of the front side of another embodiment of the safe. 3...bark, 4...handle, 6...insertion port, 7.
... Selector, 9... Numeric keypad, 15... Rotating plate,
18...Protrusion, 19...Electromagnet, 21...Limit switch, C1, C2゜c, , C4, C5, C6, c
, . . . latch circuit, CP, , CP2. ,CP, ,
CP4゜CP5. CP6. CP7... Connoctor, Dsl tDs21Da5. Ds41Ds51Ds6
1Ds7...Digi switch, 28...Dial lock.

Claims (1)

[Claims] 1. An operation key that can input a digital signal of any value, and a storage device that stores the digital signal;
A digital switch, which can be set in advance to output a digital signal of any value, compares the digital signal placed in the storage device r1t with the digital signal from the digital switch, and when the two match. It has a comparator that outputs an unlocking signal, and a driving means that is activated by the unlocking signal from the comparator to unlock the locking device, and the storage device, digital switch, and comparator are provided for each fractional digit. , the storage device stores the digital signal tones input by operating the operation keys in order of adjacent digits w/
j5 to shift to L, and the comparator outputs l! when the digital signals of the storage device and digital switch of each corresponding digit match. #An electronic lock configured to output a lock signal.