RU2043476C1 - Electronic lock - Google Patents

Abstract

FIELD: locking devices. SUBSTANCE: devise has key 1, two junctions 27, comparator 3, executive unit 4, generator of random numbers 5, memory 6, controller 8: 1-2- 3-4; 5-6-3; 8-6; 6-7; 8-7. EFFECT: high reliability. 4 dwg

Description

 The invention relates to locking devices and can be used in the technique of protecting various objects from access by unauthorized persons.

 Closest to the technical nature of the proposed technical solution is a code lock control device containing a serially connected key, connector, comparison unit and an executive unit, as well as a random number generator and a memory unit, the output of which is connected to the second input of the comparison unit.

 The technical result of the invention is to increase the secrecy of an electronic lock in case of loss (or theft) of a key.

 Figure 1 presents the structural electrical diagram of the proposed device; figure 2 an example implementation of the generator 5 random numbers; figure 3 an example of the implementation of the key 1; figure 4 an example implementation of block 8 of the control.

 The electronic lock contains a series-connected key 1, connector 2, a comparison unit 3 and an executive unit 4, as well as a random number generator 5 and a memory unit 6, the output of which is connected to the second input of the comparison unit 3, a second connector 7, the first group of contacts of which are connected to the output of the memory unit 6, the control unit 8, the first output of which is connected to the second group of contacts of the second connector 7, the second output is connected to the first input of the memory unit 6, and the third output is connected to the second input of the executive unit 4, the generator output is random numbers 5 is connected to the second input of the storage unit 6, the key is formed with the first and second inputs.

 The device operates as follows.

 The random number generator 5 continuously generates random codes. To program the key, the owner inserts the key 1 into the second socket 7, located inside the object of protection. In this case, a random code from the output of the generator 5 is written to the memory unit 6 and from the output of the unit 6 is supplied (through the first group of contacts of the second connector 7) to the first input of the key 1. The codes are written to the unit 6 and to the key 1 according to the signals generated by the block 8 control on the second and first exit.

 When opening the lock from the inside of the object of protection, a signal is used that is generated at the third output of block 8 and arrives at the second input of the executive block 4, which can be used as an electromagnetic latch.

 When you open the lock on the outside of the security object, key 1 is inserted into connector 2. In this case, the code from key 1 through connector 2 is input to the comparison unit 3. The second input of block 3 receives the code from the output of block 6 of the memory. When the codes match, block 3 generates a lock open signal, which is input to the actuator block 4.

 An example of a generator 5 of random numbers is presented in figure 2.

 The random number generator can be performed based on a shifting register with feedbacks. The composition of the generator 5 includes: a shift register 9, an addition element 10 modulo 2 and a generator 11 of the shift pulses.

 An example of the execution of the key 1 is presented in figure 3.

 The key can be made in the form of a register 12 having a first input (informational), a second input (input of an AND record) and informational output. An autonomous key power source (for example, a battery) is not shown in FIG. 3.

 An example of the implementation of the control unit 8 is presented in figure 4.

 Block 8 works as follows. When programming the key with the new code, the first button 13 is pressed. The signal from the button 13 starts the first one-shot 14. The pulse generated by the first one-shot 14 is written to the memory block 6 of the code received from the random number generator 5. In addition, the pulse from the output of the first one-shot 14 through the element 15 DOES NOT start the second one-shot 16. The pulse of the second one-shot 16 through the element 17 OR starts the third one-shot 18, forming a pulse to write the code to key 1. Thus, the sequence of writing the code to the memory first 6, and then to key 1.

 When opening the lock from the inside of the object of protection, the second button 19 of block 8 is pressed. The second button 19 starts the fourth one-shot 20, generating a pulse coming from the output of block 8 to the actuator block 4 to open the lock.

 If you want to obtain a copy of the key, the key with any code is inserted into the second connector 7 and the third button 21 of block 8 is pressed. At the same time, the third one-shot 18 is started through the OR element 17 and the pulse of writing the code to key 1 is generated at the output of block 8.

 Thus, in contrast to the recording mode of a new code, upon receipt of a copy of the key, only a pulse of writing the code to the key is generated and no pulse of writing the code to the memory unit 6 is generated.

 In the proposed device, the change of the lock code and key can be made using a duplicate key. To do this, a duplicate key is inserted into the second connector and the first button 9 of the control unit 8 is pressed. When this button is pressed, a new random code is written to the lock memory and a duplicate key, i.e. the lock provides privacy when the key is lost (stolen).

Claims (1)

 An electronic lock containing a key connected to the connector, an executive unit, a random number generator, a memory unit, characterized in that a second connector, comparison and control units are inserted into the lock, the first group of contacts of the second connector being connected to the output of the memory unit, the first input of which is connected to the first output of the control unit, the second output of which is connected to the second group of contacts of the second connector, the third output of the control unit is connected to the first input of the executive unit, the output of the random number generator nen with the second input of the memory unit, the output of which is connected to the first input of the comparison unit, the output connected to the second input of the Executive unit, and the first connector is connected to the second input of the comparison unit.

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