JP2595277Y2 - Electronic lock device for desk drawer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic lock device for a drawer for a desk.

[0002]

2. Description of the Related Art Generally, an electronic lock device used for various kinds of security is configured to be unlocked by inputting a registered password from a numeric keypad. The password may be registered at the time of shipment from the factory, but usually, the user often registers the number. In registering the personal identification number, a method of inputting a number from a numeric keypad is generally adopted on condition that the personal identification number is unlocked. Further, when changing the registered number once, the condition before the change is entered and the identity is confirmed.

[0003]

[Problems to be Solved by the Invention] However, if a new registration or a change is input on condition that the electronic lock device is in the unlocked state, the following problem occurs when the electronic lock device is attached to the desk drawer. Had occurred. This is because, at the office, etc., when the user enters the password from the numeric keypad at the beginning of work and unlocks the drawer for the desk, the operation of unlocking and locking each time after use is troublesome, so until the final lock at the end of work Is often left unlocked.

[0004] For this reason, in the unlocked state, it is possible for another person to rewrite the personal identification number without permission of the person, and there is a problem that causes a trouble in terms of security. In addition, in the case where the method using the input of the number before the change is adopted, if the user of the desk changes due to a change in the organization or the like, there is a problem that the password cannot be unlocked because the password is unknown. The present invention has been made to solve the above problems, and an object of the present invention is to provide an electronic lock device of a desk drawer that can prevent an unauthorized change of a personal identification number by another person. .

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a locking mechanism for projecting a locking member in conjunction with an operation of an operating handle to lock a drawer, and a cylinder lock. Registers a sensor that detects that the correct key is inserted and the rotary operation is being performed, and the numeric data input from the numeric keypad while the correct key is inserted into the cylinder lock and the rotary operation is performed as a password. Means,
Means for comparing the numeric data input from the numeric keypad with the registered password in the locked state, and electrically releasing the locking mechanism if they match.

[0006]

In the present invention, when the operating handle is operated, the locking mechanism interlocked with the operating handle is operated, the locking member is protruded, and the drawer is locked. While the sensor detects that the correct key is inserted into the cylinder lock and the rotary operation is being performed, the numeric data input from the numeric keypad is registered as a password. Also,
When numeric data is input from the numeric keypad in the locked state, the numeric data is compared with a registered password, and if they match, the locking mechanism is electrically released and unlocked.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an external view of an embodiment according to the present invention, and FIG. 2 is an enlarged view of a main part of FIG. In the drawing, reference numeral 1 denotes a drawer on the upper stage of the desk, which is opened and closed by a handle 2 at the center. An electronic lock device is installed on the right inside of the handle 2, and a key panel 3 is attached below the handle 2 so as to be openable and closable. The key panel 3 is, as shown in FIG.
1 to 0 numeric keys, START key, C (change
e) A key and a detection lamp 7 at the upper right corner are arranged. Further, on the right side of the handle 2 in FIG.
The keyhole 5 of the cylinder lock 34 described later is provided. A second-stage drawer 6 is provided below the drawer 1. The drawer 6 is all locked by the electronic lock device of the drawer 1.

Next, the mechanism and operation of the electronic lock device in the drawer 1 will be described with reference to FIGS. 3 shows the unlocked state, FIG. 4 shows the locked state, and FIG. 5 shows the operation when the solenoid is operated to unlock. FIG. 6 is an exploded perspective view. In the drawing, reference numeral 11 denotes a lock plate, and a spacer 12 is integrally attached to the right back surface of the lock plate 11, and the spacer 12 is supported by the base plate 13 so as to be movable in the left-right direction.

When the spacer 12 and the lock plate 11 move to the left, the left end of the lock plate 11 locks an engaging member (not shown) of the drawer, so that the drawer 1
, And an all lock mechanism (not shown) is operated to lock the lower drawer 6. As shown in FIG. 6, long holes 14, 15 are formed in the base plate 13, and projections 17, 18 of the operation handle 4 are inserted from the back side and fixed to the spacer 12. The right end of the spacer 12 is connected to the torsion spring 19, and the lock plate 11 is constantly urged rightward. Further, a guide groove 21 in the width direction is formed in the spacer 12 at an intermediate portion.

On the other hand, a lock shaft 22 is erected at a position below the long holes 14 and 15 of the base plate 13 and near the lower side of the spacer 12, and the lock shaft 22 has a lock lever 23 having a generally U-shape. Is supported. Lock lever 23
A lock pin 24 protrudes from the back surface of one end of the
1 is slidably engaged. Therefore, when the lock plate 11 and the spacer 12 reciprocate left and right, the lock lever 23 is rotated via the lock pin 24, and the other end follows an arc-shaped locus. Also, the lock lever 23
A latch lever 26 is pivotally supported by a latch shaft 25 supported by the base plate 13 to the right.

A contact surface 27 is provided at the lower end of the latch lever 26.
And an engagement hole 28 is formed in a part thereof.
These lock plate 11, spacer 12, guide groove 2
1, lock shaft 22, lock lever 23, lock pin 2
4. The latch mechanism is constituted by the latch shaft 25, the latch lever 26, the contact surface 27, and the engagement hole 28. The upper end of the latch lever 26 is engaged with the tip of a plunger 31 driven by a solenoid 29. Plunger 31
, A spring 32 is mounted so as to hold the plunger 31 in a state of protruding rightward.

When the solenoid 29 is not excited, the plunger 31 projects to the right and the latch lever 26
Is located vertically. Further, in this state, when the lock lever 23 is rotated counterclockwise due to the leftward movement of the lock plate 11, the engaging portion 33 at the other end of the lock lever 23 is brought into contact with the contact surface 27 of the latch lever 26. Abuts,
Then, the contact hole 27 is pressed to slide the latch lever 26 upward while rotating the latch lever 26 in the counterclockwise direction.
The lock lever 23 and the latch lever 26 are arranged with respect to each other so that the lock lever 23 enters the latch lever 8 and engages with the latch lever 26.

A notch 13a is formed at the lower center of the base plate 13 slightly to the left, and a cylinder lock 34 is mounted with the keyhole 5 on the back side. The dead bolt 35 of the cylinder lock 34 can be moved rightward by pressing the key and rotated to push the latch lever 26 and rotate counterclockwise. FIGS. 3 to 5 show a state in which the key is removed from the cylinder lock 34 and the deadbolt 35 is moved to the left. The cylinder lock 34 and the dead bolt 35 constitute a release mechanism. Further, a micro switch 36 serving as a sensor for detecting a released state is provided inside the right end of the dead bolt 35,
3 to detect which position of the dead bolt 35 is left or right.

Next, the operation at the time of unlocking and locking operations will be described. First, when locking, the cylinder lock 34
The operator confirms that the dead bolt 35 is positioned at the left end after the key is removed from the torsion spring 19.
The operation handle 4 is moved to the left while being opposed to. Then, the lock pin 24 engaged with the guide groove 21 is
As the lock plate 11 moves, it moves to the lower left, and the lock lever 23 is rotated counterclockwise.

At this time, as shown in FIG. 3, the engaging portion 33 at the other end of the lock lever 23 comes into contact with the contact surface 27 of the latch lever 26, and further presses and slides on the contact surface 27. To rotate the latch lever 26 counterclockwise. When the other end of the lock lever 23 rotates to a substantially horizontal position, the engaging portion 33 enters the engaging hole 28. Then, the latch lever 26 that has been pressed until then is rotated clockwise by the restoring force of the spring 32 and returns to the normal position, and the rotation of the lock lever 23 is stopped. FIG. 4 shows this state.

Here, when the operator releases his / her hand from the operation handle 4, the lock plate 11 tries to move rightward due to the restoring force of the torsion spring 19, but is blocked by the lock pin 24 in the guide groove 21, and It becomes locked. Next, when unlocking, there are two methods: a method of inputting a password and a method of inserting a key into the cylinder lock 34. In the method using a password, when a password registered in advance in the key panel 3 is input, the solenoid 29 is energized and excited.

Then, as shown in FIG. 5, the plunger 31 projecting rightward by the spring 32 is sucked by the spring 32, and the latch lever 26 is turned counterclockwise. As a result, the engaging hole 28 of the latch lever 26 retreats rightward, the engaging portion 33 comes out and the engagement is released. As a result, the rotation of the lock lever 23 becomes possible,
The lock plate 11 that was about to move to the right due to the restoring force of the torsion spring 19 returns to the right while moving the lock pin 24 in the guide groove 21 to the upper right, and is unlocked. Thereafter, when the power to the solenoid 29 is cut off and the latch lever 26 returns to the original position, the operation handle 4 can be locked again.

In the unlocking method using the cylinder lock 34, a key is inserted into the cylinder lock 34 and rotated from the locked state in FIG. 4 to move the deadbolt 35 rightward. When the dead bolt 35 moves to the right, the right end thereof contacts the contact surface 27 of the latch lever 26 and rotates counterclockwise.
As a result, the engagement between the latch lever 26 and the lock lever 23 is released, and the lock plate 11 returns to the right and is unlocked. After that, the key of the cylinder lock 34 is rotated in the reverse direction to complete the extraction and unlocking operation.

FIG. 7 is a circuit diagram showing an electrical configuration of the embodiment. In the figure, IC1 is a single-chip microcomputer, and a power supply E composed of a dry battery is connected via a voltage stabilizing circuit composed of a diode D1 and a capacitor C. Further, a numeric keypad TK is connected to the IC 1 for input. The numeric keypad TK is each key of the key panel 3, and a pressing signal of each key is input to the IC 1 through a signal line connected to the matrix. As for the C key, one of the signal lines is bypassed, and the microswitch MS is connected to the bypassed original signal line. The microswitch MS is the microswitch 36 shown in FIGS.

As an output of IC1, a transistor TR1 and a buzzer BZ are connected via a resistor R3, and a transistor TR2 and a solenoid SO are connected via a resistor R5.
L is connected. The solenoid SOL is the solenoid 29 in FIG. The emitters of these transistors TR1 and TR2 are connected to a power supply E. An electric detection circuit IC2 is connected in parallel with the power supply E.
C2 is provided to detect the exhaustion of the battery. When the battery exhausts, L2 connected to the power source E via the resistor R1 at the timing when the solenoid SOL operates.
Turn on the ED. This LED is a voltage detection lamp 7 at the upper right corner of the key panel 3.

Note that R2 and R4 in the figure are bias resistors of the transistors TR1 and TR2, respectively. A resistor R6 is connected to the buzzer BZ, and a freewheel diode D2 is connected to the solenoid SOL in parallel. Next, the operation will be described. A new password is input from the numeric keypad TK for registration, and a password already registered for unlocking is input. At the time of registration, since it is programmed in the IC 1 that an input condition is to first press the C key, the cylinder lock 34 shown in FIG. And the C key press signal can be input only while the microswitch MS is closed. That is,
While the cylinder lock 34 is locked, it is impossible to register and change the password.

The IC1 turns on the transistor TR1 and sounds the buzzer BZ each time a key press signal is input from the numeric keypad TK. When the input signal from the numeric keypad TK satisfies a predetermined registration condition, the personal identification number is registered or changed in the internal memory, and the password input for unlocking is registered. If the numbers match, the transistor TR2 is turned on to excite the solenoid SOL and release the locking mechanism. Further, the IC 2 checks the voltage of the power supply E at the timing when the solenoid SOL is energized.
D (power detection lamp 7) is turned on.

FIGS. 8 and 9 are sequence diagrams specifically showing the operation procedure in the above-described embodiment. FIG. 8 shows a case in which a password is registered. First, a key is inserted into the keyhole 5 of the cylinder lock 34 and turned to unlock. When unlocked, the user opens the key panel 3 and presses the START key and the C key sequentially while checking the sound input by the buzzer. Next, the numeric keys "1", "2", "3", and "4" are pressed.
Next, the C key is pressed. The password “1234” is registered by the above operation. At this time, it can be confirmed that the sound is repeated twice and registered when the last C key is pressed.

Next, when another password is to be registered again, the operation returns to the first key operation, and the START key is pressed.
Next, the C key is pressed twice. Here, pressing the C key twice means inputting the second password. Hereinafter, similarly, by pressing the numeric keys and finally pressing the C key, the second password is registered. In this embodiment, a configuration is provided in which any two numbers from one digit to eight digits can be registered.

After the password has been registered, the key panel 3 is closed, and the key in the keyhole 5 is returned to the original position and removed. Since this state is still unlocked, when trying to lock, the operation handle 4 is moved rightward. When locked, a clicking sound is made and the operation handle 4 is held at the right position. When the registered password is changed, the new number is entered by the above-mentioned procedure, and the old number is overwritten and changed to the new password.

FIG. 9 shows a procedure for unlocking by inputting a password. First, the user opens the key panel 3 and presses the START key while checking the sound input by the buzzer, and then presses the key of the registered password “1234” in order. Immediately after the last "4" is pressed, it is confirmed that the correct number has been input, and the unlocking operation takes place.
At this time, when the key "4" is pressed, the buzzer sounds three times in total, once by pressing the key and twice by the unlocking operation. In terms of hearing, three sounds are heard when the last key is pressed, and at the same time an unlocking sound is heard. The unlocking operation means that the solenoid SOL is operated to release the locking mechanism, and the operation handle 4 is returned to the left.

As described above, in this embodiment, the cylinder lock 3
Unless the key is inserted into the keyhole 5 and turned, the key is unlocked.
Because it is configured so that the security code cannot be registered or changed, if the electronic lock device is attached to the desk drawer, even if the drawer is unlocked, the key must be removed and stored separately. Therefore, the security code is not changed by another person, and the security and the usability are improved. In addition,
In the embodiment, the micro switch MS is connected in series to the signal line of the C key. However, the detection signal itself of the micro switch MS may be input to the IC 1.

[0028]

As described above, according to the present invention, only the numeric data input from the numeric keypad while the correct key is inserted into the cylinder lock and the rotary operation is performed is registered as the personal identification number. Therefore, it is impossible to register or change the personal identification number in a state where the desk drawer is simply opened, and it is possible to prevent unauthorized modification of the personal identification number by a person other than the person, thereby improving security.

[Brief description of the drawings]

FIG. 1 is an external view of an embodiment according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an explanatory diagram showing a schematic configuration and operation of a mechanism section of the embodiment according to the present invention.

FIG. 4 is an explanatory view showing a schematic configuration and operation of a mechanism section of the embodiment according to the present invention.

FIG. 5 is an explanatory view showing the operation of the mechanism section of the embodiment according to the present invention.

FIG. 6 is an exploded perspective view of a mechanism according to the embodiment of the present invention.

FIG. 7 is a circuit diagram showing an electrical configuration of the embodiment according to the present invention.

FIG. 8 is a sequence diagram showing an operation procedure of the embodiment according to the present invention.

FIG. 9 is a sequence diagram showing an operation procedure of the embodiment according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drawer 2 Handle 3 Key panel 4 Operation handle 5 Keyhole 6 Drawer 7 Electric detection lamp 11 Lock plate 12 Spacer 13 Base plate 13a Notch 14, 15 Slot 17, 18 Projection 19 Torsion spring 21 Guide groove 22 Lock shaft 23 Lock lever 24 Lock pin 25 Latch shaft 26 Latch lever 27 Contact surface 28 Engagement hole 29 Solenoid 31 Plunger 32 Spring 33 Engagement part 34 Cylinder lock 35 Dead bolt 36 Micro switch BZ Buzzer C Capacitor D1, D2 Diode E Power supply IC1 Single chip microcomputer MS Micro switch R1-R6 Resistance SOL Solenoid TK Numeric keypad TR1, TR2 Transistor

Claims (1)

(57) [Scope of request for utility model registration] 1. A lock mechanism for locking a drawer by projecting a lock member in conjunction with operation of an operation handle, and a state in which a correct key is inserted into a cylinder lock and rotated. A sensor for detecting, a means for registering the numeric data input from the numeric keypad as a password while the correct key is inserted into the cylinder lock and rotating, and a numeric data input from the numeric keypad in a locked state are registered. And a means for electrically releasing the locking mechanism when the passwords match the passwords.