CN1148508C - Emergency unlocking system for electronic door lock - Google Patents

Abstract

The present invention relates to an emergency unlocking system for an electronic door lock, which is composed of a backup circuit and an emergency hand-held unlocking device in a lock body, wherein a memory in the backup circuit exchanges data with a CPU in a main control circuit at any time by a group of electronic relays. When the power supply or the main circuit board of the lock generate failure, and emergency unlocking processing is needed, the emergency hand-held unlocking device is inserted into an emergency jack under the lock body to be connected with the backup circuit; the emergency hand-held unlocking device provides the power supply and inputs a password so that the backup circuit replaces the function of the main circuit to turn on a driving circuit, a clamping part is released, and then, the lock can be unlocked by pressing a handle.

Description

A kind of emergency unlocking system of electronic lock

Technical field:

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

Background technology

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 mechanical, electrical two parts, the link that breaks down can be higher than the common mechanical cylinder lock again, electronic lock is a branch of electronic lock, door must not need emergency measure in case open, and emergent unlocking is handled, and just becomes the development problem of electronic lock naturally.

Various electronic locks of Chu Xianing in the market, when they break down, for example outage, the circuit corrosion, mainboard or read/write head are by artificial destruction ..., cause door leaf not to be opened, solve this moment the way open the door have only further destruction it or take a kind of emergency processing mechanism, current each big hotel, the intelligent electronic lock that uses on the hotel guest room has all adopted 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 open system, 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, do not make 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, emergency cryptosystem 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 emergent treatment system, to the advantage of bringing into play the electronic lock high security crucial meaning will be arranged.

Summary of the invention:

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 system of peripheral hardware that door is opened, this system still uses electronic cipher when starting, and has 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 (stand-by circuit), it separates with motherboard circuit (governor circuit), only interconnect through one group of electronic relay, to provide power supply by the emergency opening plug receptacle during work, 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, the smart circuit and the standby electric power that on emergent hand-held opener, have the band microprocessor inner the same with electronic lock, simultaneously also with the radio frequency induction module, LCDs and keyboard, and the communication interface that interrelates with the door lock plug receptacle, when enabling, import the password password earlier with keyboard, perhaps swipe the card at the head of emergent hand-held opener, its plain code is set up the communication relation through communication interface and the stand-by circuit in the lock, the microprocessor of stand-by circuit 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 receive password password from emergent hand-held opener, open start 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 system architecture of the present invention below in conjunction with accompanying drawing.

Description of drawings:

Accompanying drawing 1 is this example emergency unlocking system circuit theory diagrams

Accompanying drawing 2 is that the code implication is as follows in the outside drawing accompanying drawing 1 of emergent hand-held opener:

The microprocessor of U1 stand-by circuit, U2 electronic relay group, the standby memory of U3,

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

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

The specific embodiment:

Emergency unlocking system circuit shown in the accompanying drawing 1 adopts standby memory U3, and electronic 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.Electronic relay group U2 has the handoff functionality of four blade double-throw, and U2-1 (COL1) and U2-14 (COL2) are for driving pin.

Standby memory U3 is connected with stand-by circuit by the constant close contact of electronic relay in operate as normal, and promptly D1-D3, C1-C3, B1-B3 link to each other, and this moment, standby memory U3 and governor circuit were isolated on electric fully, were in stand-by state to guarantee it.When the user's modification password, governor circuit switches electronic relay U2 by control end PO.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, governor circuit can carry out write operation to it, amended password is write among the standby memory U3, in case write success, governor circuit promptly discharges PO.6, make electronic relay get back to normality, this moment, the constant close contact of electronic relay recovered closed, and standby memory returns by stand-by circuit and controls.

When in a single day the power supply of governor circuit or microprocessor 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 microprocessor that lost efficacy and come executable operations, use keyboard input password earlier by the user when enabling, or use the radio frequency induction card (key card) that has suitable password to swipe the card at emergent hand-held opener head, set up the communication relation with stand-by circuit, make computations through lock body inward circuit, compared with the password among the standby memory U3, if both unanimities, 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, emergent unlocking must have the owner of lock on the scene, and to be undertaken by owner's licencing key, in the process of emergent unlocking, still to use electronic cipher, password code was provided with in the past by former lock, the owner who has only lock as can be known, and can arbitrarily change, thereby having high confidentiality, emergent hand-held opener no matter in whose hand is not locked owner's password password and can not be opened door, thereby have the height reliability and safety, after finishing emergent unlocking, open if password is thought, changing battery, got rid of after the line fault, the lock owner can reset password to electronic lock, makes new key card, has given full play to the advantage of electronic lock.The superiority of present design is that also factory and after-sale service unit all can not be with copy key or other emergent means are opened voluntarily, if lose password, can only carry out local failure to lock opens, time will be more than 20 minutes, demonstrate fully the safety of lock, given up purchasing the lock people may miss key cipher to lockmaking producer doubt.

Claims (3)

1. the emergency unlocking system of an electronic lock, by governor circuit, stand-by circuit and external emergent hand-held opener are formed, it is characterized in that governor circuit and stand-by circuit are as interconnective two independent parts with one group of electronic relay, the plug receptacle that emergent hand-held opener is designed by lock housing body below links to each other with stand-by circuit, the smart circuit and the standby electric power that on emergent hand-held opener, have the band microprocessor inner the same with electronic lock, simultaneously also with the radio frequency induction module, LCDs and keyboard, and the communication interface that interrelates with the door lock plug receptacle.

2. by aforesaid right requirement 1 described emergency unlocking system, it is characterized in that standby memory and the same electrically-erasable memory that is of main memory in the governor circuit in the stand-by circuit.

3. by aforesaid right requirement 1 described emergency unlocking system, it is characterized in that having adopted in the native system electronic relay group with four blade double-throw handoff functionality.

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