CN2459408Y - Emergency opener for electronic door lock - Google Patents

Abstract

The utility model relates to an emergency opener for an electronic door lock. In the utility model, a set of independent back-up cipher identification and control circuit can be arranged in a lock which can be separated with a main board and can be respectively connected with a main control circuit and a CPU of a back-up circuit through a set of electromagnetic relay, and a motor or magnet driving switch circuit which is arranged in the back-up circuit can be connected with the back-up CPU. A special-shaped connecting socket can be connected with an emergency hand-hold opener in which a back-up power supply, a radio-frequency induction module and a communication interface which is associated with the connecting socket of a door lock can be arranged. A driving circuit can be opened when the functions of the main circuit is replaced by the emergency hand-hold opener through the back-up circuit when a lock power supply or a main circuit board has failures, and a door can be opened by pressing a handle when clamping parts are released.

Description

A kind of emergency opening device of electronic lock

The invention belongs to a kind of subsidiary body on the electronic lock, particularly when door lock breaks down, be used for the emergency opening device of a kind of electronic lock of emergency processing.

As everyone knows, its repetition rate of coding of various electronic locks of Chu Xianing is well below the level of common mechanical lock in recent years, confidentiality all can be higher than the standard machinery lock, so be subjected to the generally attention of locking industry, but electronic lock comprises machine, two parts of electricity, the link that breaks down can be higher than the common mechanical cylinder lock again, when existing various electronic lock breaks down, usually the emergency opening way of taking has two classes, the one, further destroy it, another kind of is to lock additional one the way of mechanical cylinder lock as emergency opening, for example ZL 99205635.7 (smart card door lock) and commercially available Canada produce UNICAN 710 intelligent electronic locks, below its door lock shell, all process an emergent lockhole, a common spring lock core is installed in it, when dead battery or circuit chance failure occurs and do not open, can in administrative staff's hand, take a universal metal key, from emergent lockhole, door is opened, factory all provides an energy format to criticize this metal key of all when every batch of supply of material, make that door lock is actual to have a dual opening device, in case this moment, metal key was stolen or lose, all locks all are in the state that loses preventive effect, secret actual grade is reduced greatly, therefore the keeping of this emergency key just becomes all in all problem, and the level of control measures will become a kind of foundation of lock safety and reliability.This kind emergency mode obviously is inappropriate for the family expenses door lock, some other electronic lock yet in addition, adopted the design in emergent hole, can from emergent hole, open by the direct dialing dead bolt by the special-purpose device that band colludes, this mode is in case quilt is understood also and can be copied, and its confidentiality also can be had a greatly reduced quality.

Chinese patent CN2330748Y (autonomous type electronic password lock) has proposed a kind of method of utilizing stand-by circuit to unblank, have stand-by circuit locking, when governor circuit breaks down, master key can be inserted standby key socket startup stand-by circuit and open the door, the described mode of this patent exists the hidden danger of two aspects:

1. be main password on user's master key if the door-opening password of stand-by circuit uses, described according to this patent specification, main password on the master key can be changed at any time by the user, password after the replacing has only been done the rewriting record in main circuit, and in stand-by circuit, not making record, then more the master key behind the change owner password can't start stand-by circuit by the standby key socket, and it is impossible that emergency opening will become.

2. if the door-opening password in the stand-by circuit is the dedicated emergency door-opening password that is fixed in the master key, then more dangerous, because it is described to press patent specification, this kind electronic password lock, no matter be lock internal memory or the interior memory of key, do not possess the logical encrypt function, the master key that is to say the user very easily is replicated, in case duplicated by the people, all has random cipher to produce although open the door at every turn, can not open the door from the master key socket, be not but can directly open the door by the standby key socket, easier? this in addition emergent scheme of opening the door, the password that dispatches from the factory of lock is to grasp in the hand of locksmithery, the user can't intervene, and this is a kind of inequitable product to the user.

Above-mentioned deficiency at existing electronic lock works out a kind of more rational emergency treatment device, to the advantage of bringing into play the electronic lock high security crucial meaning will be arranged.

Purpose of the present invention is exactly to propose a kind of new design philosophy and concrete structure, guaranteeing to operate easily under the prerequisite, make full use of the identification advantage of electronic cipher, when chance failure appears in the inside of lock, utilize the electronic installation of peripheral hardware that door is opened, still use original device password and decoding process during this device starting, have same sensitivity level, make the former not forfeiture that has superiority of electronic lock, thereby kept the high secret advantage of electronic lock.

The object of the present invention is achieved like this, below the stock lock housing, design an emergency opening plug receptacle, there is cover plate to cover at ordinary times, the indoor design of electronic lock has one independently to back up password identification circuit, it separates with motherboard circuit, only interconnect through one group of electromagnetic relay, at any time do exchanges data with mainboard, when chance failure appears in the electronic device of lock body inside or power supply, utilize a special tool that is called emergent hand-held opener, be inserted in the plug receptacle below the lock housing body with special-shaped plug, on emergent hand-held opener, contain standby electric power, radio frequency induction module (forming) and the communication interface that interrelates with the door lock plug receptacle by chip U2270B and induction coil, when enabling, emergent hand-held opener is linked to each other with the emergency opening plug receptacle of locking by special-shaped plug, swipe the card at the position, induction coil place of emergent hand-held opener then, information on the card can be read by the stand-by circuit of lock body inside, judge the open the door authority and the legitimacy thereof of card, if be identified as legal card, its plain code is set up the communication relation through communication interface and the inner backup of lock password identification circuit, the emergent circuit that opens the door is made computations in lock body, convert plain code to private mark, compared with the memory password code again, if it is consistent with the agreement of prior agreement, then identification is passed through, can open Drive and Control Circuit, make executive component (electromagnet or micro machine) action, discharge clamping unit, just can open door by lower handle this moment.Further set forth the operating characteristic of apparatus of the present invention structure below in conjunction with accompanying drawing.

Accompanying drawing 1 is that the code implication is as follows in this example stand-by circuit schematic diagram accompanying drawing 1:

U1 spare CPU, U2 electromagnetic relay group, U3 backup memory,

U4 motor-drive circuit, U5 motor control switching circuit,

Meet an urgent need plug receptacle, M1 of J1 opened and discharged micro machine.

Accompanying drawing 2 is that the coding representative is as follows in the outside drawing accompanying drawing 2 of emergent hand-held opener:

1 is that special-shaped plug 2 shows that for connecting light emitting diode 5 is decoration hole for induction reception area 4 for housing 3

The stand-by circuit of the emergency opening device shown in the accompanying drawing 1 adopts backup memory U3, and electromagnetic relay group U2.The same electrically-erasable memory that is with main memory of U3, data/address bus are that I2C only needs two lines just can realize the access exchange of data, are convenient to electric handover operation.Electromagnetic relay group U2, handoff functionality with four blade double-throw, 1 and 14 pins of U2 are for driving pin, in operate as normal, backup memory U3 is connected with spare CPU by the surface dust constant close contact of electromagnetic relay, be that D1-D3, C1-C3, B1-B3 link to each other, this moment, standby memory U3 and main circuit were isolated on electric fully, were in stand-by state to guarantee it.When the user's modification password, main circuit switches electromagnetic relay U2 by control end P0.6, make its constant open contact closure, be that D1-D2, C1-C2, B1-B2 link to each other, this switching also just makes standby memory U3 be connected with main circuit board, main circuit can carry out write operation to it, amended password is write among the standby memory U3, in case write success, main circuit promptly discharges P0.6, make electromagnetic relay get back to normality, this moment, the constant close contact of electromagnetic relay recovered closed, and the backup memory returns by spare CPU to be controlled.

When in a single day main circuit power or CPU break down and do not open, then can utilize the power supply power supply on the outside emergent hand-held opener, in the time of on the emergent plug receptacle J1 outside emergent hand-held opener is received below the lock body, it is with regard to a suitable governor circuit, replace the internal electric source and the CPU that lost efficacy and come executable operations, only need when enabling to swipe the card at the head at emergent hand-held position, opener induction coil place, stand-by circuit promptly can read the information in the card, make computations through lock body inward circuit, compared with the password among the backup memory U3, if have this card record, and the record of this card belongs to legal, and then identification is passed through, promptly can connect the motor that opens the door (or magnet) drive circuit U4, make motor (or magnet) action, discharge clamping unit, reach the purpose that just can open the door by fixed handle.

The advantage of the scheme of should suddenly unblanking is still to use former in the process of emergent unlocking Password was arranged in the past by former lock owner in the key card of lock, lock and card, only had the owner of lock can Know, and can arbitrarily change emergent hand-held opener is no matter in whose hand, lock is not main Who can not open door people's key card, thereby reliability and the security of height are arranged, Finish after the emergent unlocking, join and changed new circuit mainboard or components and parts, perhaps changed electricity The pond has been got rid of after the line fault, and the lock owner can reset password to electronic lock, system The key card that makes new advances has been given full play to the advantage of electronic lock. The superiority of present design Be that also factory and after-sale service unit all can not use voluntarily copy key or other emergent hands Duan Kaiqi if the original key card is all lost, can only open the time to being locked into capable local failure To demonstrate fully the security of lock more than 20 minutes, give up purchasing the lock people to locksmithery Family may miss the doubt of lock ﹠ key password.

Claims (2)

1. the emergency opening device of an electronic lock, formed by memory, microprocessor, radio frequency induction module, electromagnetic relay and standby electric power, be provided with a cover in it is characterized in that locking by independently backing up the stand-by circuit that password identification and control circuit constitute, it separates with mainboard, link to each other the E that in stand-by circuit, contains with the CPU of governor circuit by one group of electromagnetic relay ²PROM memory and motor or magnet drives commutation circuit link to each other with spare CPU, and whole stand-by circuit links to each other with emergent hand-held opener by special-shaped plug receptacle.

2. require 1 described emergency opening device according to aforesaid right, it is characterized in that being equipped with in the emergent hand-held opener standby electric power and the radio frequency induction module special-shaped plug by termination portion and link to each other with the door lock stand-by circuit.