KR20020003660A - Locking system having seesaw switch for inputting password and control method of the same - Google Patents

Abstract

PURPOSE: A lock system having a seesaw switch for inputting a password and a method for controlling the same are provided to input a password by using a seesaw switch. CONSTITUTION: A seesaw switch(20) is used for receiving a password. The seesaw switch(20) has a structural characteristic switched to two different directions. The seesaw switch(20) has a fixing contact point(22) connected with a ground(GND) and the first and the second switching contact points(24,26) connected with supply voltage through pull-up resistances(R1,R2). A control unit(30) receives a combination of switching signals from the seesaw switch(20) as a password input and performs a password test. The control unit is formed with a temporal storage register(34), a memory(35), a counter(37), and a control logic(36). A locking unit(40) is used for locking or unlocking a door according to a control operation of the control unit(30).

Description

LOCKING SYSTEM HAVING SEESAW SWITCH FOR INPUTTING PASSWORD AND CONTROL METHOD OF THE SAME}

The present invention relates to a lock system, and more particularly, to a lock system that can input a password using a seesaw switch so that a nearby person cannot easily detect a password inputted when a password is input.

Generally, the locking system has a keypad for entering a password. A typical keypad used in a locking system consists of ten numeric keys '0' through '9' and two letter keys '*' and '#'. Such a typical keypad is used for password input to unlock the locking system.

However, such a keypad has a problem that the input password can be easily exposed to the surrounding people due to its structural characteristics. Of course, a lock system using an electronic card or fingerprint recognition is provided, and the use of these may solve the problem of password exposure. However, these locking systems are so expensive that they are a burden for the average consumer to install. Therefore, there is a need for a lock system having a lower security, such as a lock system using a keypad, and having a higher security with less risk of password exposure.

Accordingly, it is an object of the present invention to provide a locking system that allows a user to input a password using a seesaw switch so that the surroundings cannot easily recognize the password when the password is input.

1 is a view showing an example in which the locking system of the present invention is installed in the door;

2 is a block diagram showing a circuit configuration of a locking system according to a preferred embodiment of the present invention;

3 is a flowchart illustrating a password checking process by the control logic of FIG. 2.

* Description of the symbols for the main parts of the drawings *

10: door handle 20: seesaw switch

22: fixed contact 24, 26: switch contact

30: door control unit 31, 32: input port

33: Output port 34: Register

35: password 36: control logic

37: counter 40: locking unit

According to one aspect of the present invention for achieving the object of the present invention as described above, the locking system: generates a first switching signal when switched in the first direction, with respect to a second direction different from the first direction; A seesaw switch for inputting a password which generates a second switching signal when switched; Accepting a combination of the first and second switching signals generated from the seesaw switch as a password input, comparing the combination of the first and second switching signals input from the seesaw switch and a set password to release the lock state if they match. A control unit for generating a control signal for the control unit; And a lock unit that releases the lock state in response to the release control signal.

In this embodiment, the control unit comprises: first and second input ports for receiving the first and second switching signals, respectively; Memory for storing a password; A register having a number of bits equal to the number of bits of the password; The first and second switching signals are received through the first and second input ports, and each bit of the register is sequentially set to '1' or '0' according to the input of the first or second switching signal. Control logic for setting and generating the unlocking signal when the value of the register is compared with the password stored in the memory when the password is input; And an output port for outputting the lock release signal to the lock unit. The password consists of a combination of '1' and '0' repeated at least once.

In this embodiment, the seesaw switch generates a third switching signal when switched in a third direction different from the first and second directions, and the control unit is in response to the input of the third switching signal. The set password is compared with a combination of the first and second switching signals input from the switch.

In this embodiment, the seesaw switch is installed on one side of the door handle.

According to another aspect of the present invention, a control method of a lock system having a seesaw switch for password input includes: determining whether there is a switching input from the seesaw switch; When a switching signal is input from the seesaw switch, sequentially setting each bit of the temporary storage register to a value corresponding to the seesaw switch switching direction among '1' or '0'; When setting of each bit of the register is completed, determining whether a value set in the register and a password stored in a memory match; And generating a control signal for releasing the locked state of the lock unit when the passwords match.

In this embodiment, the control method clears the register if the input of the switching signal from the seesaw switch is greater than the number of bits of the password, and the input of the switching signal from the seesaw switch does not reach the number of bits of the password. Clearing the register when there is no input of the switching signal in the state for more than a predetermined time.

(Example)

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The novel locking system of the present invention has one seesaw switch for password entry. The seesaw switch is switched in two different directions, and a combination of switching signals input from the seesaw switch functions as a password.

1 is a view showing an example in which the locking system of the present invention is installed in the door. As shown in the figure, the locking system of the present invention can be installed in the door of the area requiring security. The seesaw switch 20 is mounted on one side of the door handle 10 of the door. And although not shown, the control unit and the locking unit of the system may be installed inside the door. The seesaw switch 20 is installed at a position where the person can easily operate with the thumb when the person holds the door handle 10 by hand. The seesaw switch 20 has a structure that is switched in two different directions. The seesaw switch 20 generates a first switching signal when switched in a first direction, and generates a second switching signal when switched with respect to a second direction different from the first direction.

In this embodiment, the seesaw switch 20 has a structure that is switched respectively with respect to the upper direction and the lower direction. However, as another example, the seesaw switch 20 switches in a direction different from the first and second directions, for example, in a third direction orthogonal to the seesaw switch 20 when the seesaw switch 20 is in a neutral position. When the third switching signal is generated, the third switching signal may be used to indicate that the password input by the seesaw switch 20 is completed.

2 is a block diagram showing a circuit configuration of a locking system according to a preferred embodiment of the present invention. Referring to the drawings, the locking system of the present invention is largely composed of the seesaw switch 20, the control unit 30 and the locking unit 40. The seesaw switch 20 functions as a password input means, and the control unit 30 accepts a combination of switching signals input from the seesaw switch 20 as a password input and performs a password check. And the lock unit 40 is controlled by the control unit 30 to lock or unlock the door. The password is a combination of '1' and '0' repeated at least once each.

The seesaw switch 20 has a structural feature that is switched in two different directions as described above. The seesaw switch 20 has one fixed contact 22 connected to the ground GND and a first and second switching contact 24 connected to the power supply voltage Vcc through respective pull-up resistors E1 and R2. , 26). When the seesaw switch 20 is first switched with respect to the first direction, the fixed contact 22 and the first switching contact 24 are electrically connected to each other so that a first switching signal having a ground (GND) level is generated to control the unit. 30 is input to the first input port 31. When switching in the second direction opposite to the first direction, the fixed contact 22 and the second switching contact 26 are electrically connected to each other to generate a second switching signal having a ground (GND) level, thereby controlling the control unit 30. ) Is input to the second input port 32. When the seesaw switch 20 is not switched in any direction, the fixed contact 22 is not electrically connected to any one of the first and second switching contacts 24 and 26.

In another embodiment, as described above, the seesaw switch 20 is orthogonal to the seesaw switch 20 in a direction different from the first and second directions, for example, when the seesaw switch 20 is in a neutral position. When switching in the third direction may have a third switching contact (not shown) that is electrically connected to the fixed contact 22 to generate a third switching signal of the ground (GND) level, the third switching signal is seesaw It can be used to indicate that the password input by the switch 20 is completed. In addition, the control unit 30 may include a separate input port for inputting a third switching signal.

The control unit 30 includes a temporary storage register 34 having a predetermined number of bits, a memory 35 storing a password, a counter 37 for counting a predetermined time, and control logic for overall control of the system. It consists of 36. And at least two first and second input ports 31 and 32 and at least one output port 33. Those skilled in the art will appreciate that the configuration of the control unit 30 may be configured as one microprocessor, and may also be configured using separate circuit configurations.

The control logic 36 sets the corresponding bit of the register 34 to '1' or '0' according to the first and second switching signals input through the first and second input ports 31 and 32. When the password input is completed, the value set in the register 34 and the password stored in the memory 35 are compared, and if a match is found, a control signal for releasing the lock state of the locking unit 40 through the output port 33 is obtained. Output

More specifically, the password checking process by the control logic 36 will be described in detail with reference to FIG. 3. 3 is a flowchart illustrating a password checking process by the control logic of FIG. 2.

Referring to the drawing, in step S10, the control logic 36 determines whether the first or second switching signal is input through the first or second input ports 31 and 32. When the first or second switching signal is input, the process proceeds to step S11 to set the least significant one bit of the register 34 to a value '1' or '0' corresponding to the input port. In step S12, it is determined whether password input is completed.

If the password input is not completed, the flow advances to step S13 to shift the register 34 by one bit. In step S14, the counter 37 is operated to count the specified time. In step S15, it is determined whether there is an input of the switching signal while counting the predetermined time. If there is an input of the switching signal, the flow advances to step S16 to clear the counter 37 and to repeat step S11. This control operation is repeated until the switching signal is input by the number of bits of the designated password.

If there is no input of the switching signal, the flow advances to step S17 to determine whether the specified time count has been completed. If the specified time count is completed, the flow advances to step S24 to clear the register 34 and end. In this case, the password input is not completed and the designated time has elapsed.

Again, if it is determined in step S12 that the password input has been completed, control proceeds to step S18. In step S18, the counter 37 is operated to count a specified time. In step S19, it is determined whether there is a switch input. If there is a switch input, the flow advances to step S24 to clear the register 34 and ends. This case is a case where the password input exceeds the designated number of bits and is treated as a password input error.

If it is determined in step S19 that there is no switch input, it is determined whether the count is completed in step S20. When the count is completed, the value stored in the register 34 is compared with the password stored in the memory 35 in step S21. If the passwords do not match in step S22, the flow advances to step S24 to clear the register 34 and terminate. This case is treated as a password error. However, if the value stored in the register 34 and the password stored in the memory 35 match, the lock state is released in step S23. That is, a control signal for releasing the lock state is output to the lock unit 40 through the output port 33. The lock unit 40 releases the lock state in response to the release control signal.

The locking system having the seesaw switch of the present invention as described above can be installed in the door that requires access control and can be installed in the door handle of the safe or the car. In particular, since the password input means is composed of a small size of the seesaw switch, the installation area can be reduced, which is suitable for a place requiring a small size locking system.

As described above, the configuration and operation of the locking system according to a preferred embodiment of the present invention has been shown according to the above description and drawings, but this is merely described for example and various within the scope without departing from the technical spirit of the present invention. It will be understood by those skilled in the art that variations and modifications are possible.

According to the locking system of the present invention as described above, by using a single seesaw switch to enter a password, people located near the person who enters the password when entering the password can not easily recognize the password being entered for higher security Castle is secured.

Claims (7)

A seesaw switch for generating a password when generating a first switching signal when switching in a first direction and generating a second switching signal when switching with respect to a second direction different from the first direction; Accepting a combination of the first and second switching signals generated from the seesaw switch as a password input, comparing the combination of the first and second switching signals input from the seesaw switch and a set password to release the lock state if they match. A control unit for generating a control signal for the control unit; And And a locking unit for releasing a locked state in response to the release control signal. The method of claim 1, The control unit is: First and second input ports for receiving the first and second switching signals, respectively; Memory for storing a password; A register having a number of bits equal to the number of bits of the password; The first and second switching signals are received through the first and second input ports, and each bit of the register is sequentially set to '1' or '0' according to the input of the first or second switching signal. Control logic for setting and generating the unlocking signal when the value of the register is compared with the password stored in the memory when the password is input; And And an output port for outputting the lock release signal to the lock unit. The method of claim 2, And the password comprises a combination of '1' and '0' repeated at least once. The method of claim 1, The seesaw switch generates a third switching signal when switched in a third direction different from the first and second directions, And the control unit compares a set password with a combination of the first and second switching signals input from the seesaw switch in response to the input of the third switching signal. The method of claim 1, The seesaw switch is a locking system installed on one side of the door handle. In the control method of the locking system with a seesaw switch for password input: Determining whether there is a switching input from the seesaw switch; When a switching signal is input from the seesaw switch, sequentially setting each bit of the temporary storage register to a value corresponding to the seesaw switch switching direction among '1' or '0'; When setting of each bit of the register is completed, determining whether a value set in the register and a password stored in a memory match; And And generating a control signal for releasing the locked state of the locking unit when the passwords match. The method of claim 6, The control method If the input of the switching signal from the seesaw switch is greater than the number of bits of the password, the register is cleared, And clearing the register when the input of the switching signal is not longer than a predetermined time while the input of the switching signal from the seesaw switch does not reach the number of bits of the password. Control method of having a locking system.