CN2591146Y - Alarmer of door lock - Google Patents

Abstract

The utility model relates to an alarm device of a door lock. The structure of the existing devices of the type is relatively complicated in general, the reliability of some devices is poor, and the practicality of the devices can not be realized. The utility model is characterized in that a contact pin is arranged close to a lock tongue of a lock body, the relative movement of the contact pin and the lock tongue is used for distinguishing if a door is opened in normally, and simultaneously, corresponding circuits are switched on and switched off to realize the warning function of the utility model. The device can effectively prevent the stealing mode of breaking doors or locks by violence. The utility model has the advantages of simple structure and reliable action.

Description

A kind of door lock warning device

Technical field

The utility model is a kind of door lock warning device.

Background technology

Warning device all relates to the problem of the identification of reporting to the police, and promptly starts under which type of condition and reports to the police.This general class device all be by modes such as light, electricity, magnetic come to the information on key, magnetic card, the punched card carry out very, pseudo-discriminating, with this condition as the unlatching or the warning of door.For example obtaining " the alarming anti-theft safety lock " of No. 1419375 patents of Britain, " electronic lock system " that obtain No. 4411144 patents of the U.S. all is based on this principle and carries out work.Also has plenty of long and short foundation as warning with uncaging time." alarm anti-theft lock " as the CN86206235 number of patent application.

The common structure more complicated of warning device, the cost height conceived based on above-mentioned condition for identification; Though simplifying the structure of having but not too adapts to the complex environment of family, cause false alarm easily.

Summary of the invention

The purpose of this utility model provides a kind of theftproof alarm door locking device from economy and practical angle to average family exactly, the mode of committing theft such as it can be taken precautions against effectively and force open the door, picking lock, violence are forced open the door.

The purpose of this utility model is that sample is realized: a kind of door lock warning device of forming by contact pin, warning circuit and alarm, an exposure is arranged in the lock body outside in the side of dead bolt, and its direction of motion is same as dead bolt, is used to trigger the metal contact pin of warning.Its circuit mainly is to utilize triode Q1 that the electric current that sparks of capacitor C is amplified to promote the relay J adhesive.Be provided with three couples of contact K1, K2, K3 in the lock body, wherein K1, K2 contact are stretched out by contact pin respectively and are touched when being pressed into lock body; When being rotated by the sincere hand of key unlocking or lock, the K3 contact touches.Contact K2 and element R3 constitute the charging circuit of capacitor C; Contact K1 and element C, R2, Q1 constitute the discharge loop of capacitor C; Contact K2 is used for capacitor C is formed short circuit.

This device is by the inside at common door lock a contact pin and three pairs of contacts to be set, and connects with warning device by line and to realize its function.

Description of drawings

Fig. 1 is the utility model door lock warning device circuit diagram, is warning device in the frame of broken lines of its middle and upper part, and it is connected by lead L1, L2, L3, L4 and the contact that is positioned at figure bottom lock body;

Fig. 2 is the fundamental diagram of contact pin;

Fig. 3 has reflected that alarm A is used schematic diagram by lead L and door lock B.

Accompanying drawing number:

1. contact pin 2. dead bolts 3. boss

4. slide block 5. lock boxes 6. lock bodies

The specific embodiment

As shown in Figure 1, contact K1, K2, the arrangement of K3 (wherein K1, K2 are combined into a single-pole double throw contact) in lock body are: contact K1, K2 are arranged in the front end of lock body, when being positioned at the complete exposure lock body of contact pin 1 and the boss 3 of contact pin interlock can position with its shake-up on; The position of K3 is arranged on the rear portion of lock body.When being retracted into lock body, touches dead bolt by slip 4.

The operating principle of this device is:

When door was closed, contact pin 1 was retracted into lock body 6 under the compressing that is positioned at the lock box 5 on the doorframe, and this moment, boss 3 correspondingly retreated the conducting of K2 contact.To capacitor C charging, finish by charging later in 1 minute by L3, L2, R3 for electric current, and device enters the state of alert.

Improper opening the door

Because existing safety lock mostly has the anti-function of dialling, run into promptly that dead bolt 2 can not be retracted in the lock body when forcing open the door, when door and doorframe are prized from certain interval, dead bolt also fails to withdraw from before the lock box, and contact pin 1 will outwards eject, and boss 3 makes the conducting of K1 contact, capacitor C discharges by L3, R2, Q1 and L1, Q1 promotes the relay J adhesive after electric current is amplified, and makes J1, J2 conducting, and electric bell is rung.After discharge finishes, because the effect of self-shield contact J1 is arranged, J will continue adhesive.

If door suffers violence damage, then in the moment that lock body or lock box come off, contact pin 1 ejects lock body also can bring out warning.Fac is forced open the door from hinge one side of door, and contact pin still can eject warning when opening.

Normal door

When opening with key or sincere hand, dead bolt 2 is retracted into lock body, and slide block 4 makes and the conducting of K3 contact capacitor C formed short circuit dischange, just do not have electric current to pass through when connecting K1 again with rear boss 3 in the base loop of Q1.

Sometimes in order to open the door conveniently, dead bolt 2 is recovered in the lock body, this moment K2, K3 conducting simultaneously, the charging current of capacitor C is by the K3 bypass.

The purpose that line L4 is set is in order to ensure the reliable connection between warning device two parts (being two frame of broken lines parts among Fig. 1).Normal condition, acting on by L3, L4 has a backward voltage on the diode D1, make it be in cut-off state.D1 conducting when L3 or L4 are cut off, the collector current of Q2 makes the J adhesive.Because the line between device two parts is to cross over crack between a door and its frame by hinge one side of door, this side of opposite house has also formed protective wire one.

This device is eliminated only to be needed when reporting to the police normally closed switch K switch is once got final product.

As seen by aforementioned, the warning condition for identification of this device is: contact pin 1 does not eject if dead bolt 2 is retracted into lock body when opening the door, and just thinks improper opening the door, and starts and reports to the police.

Compare with existing apparatus, the utlity model has following advantage:

1. with low cost, circuit is quite simple;

2. anti-theft feature is strong, can not produce false alarm, thereby may adopt this forte of electric bell to ring alarm;

3. easy to use, general key is driven general lock;

4. rational in infrastructure, the contact all is arranged on lock body inside, and is not fragile, often touches during the open and close door, corrosion can not occur.

5. power consumption hardly, because device is to be operated under the microampere order electric current, a year power consumption is lower than 0.5 degree.

Claims (4)

1. door lock warning device of being made up of contact pin, warning circuit and alarm is characterized in that: an exposure is arranged in the lock body outside in the side of dead bolt, its direction of motion is same as dead bolt, is used to trigger the metal contact pin (1) of warning.

2. warning device according to claim 1 is characterized in that: its circuit mainly is to utilize triode Q1 that the electric current that sparks of capacitor C is amplified to promote the relay J adhesive.

3. warning device according to claim 1 is characterized in that: be provided with three couples of contact K1, K2, K3 in the lock body, wherein K1, K2 contact are stretched out by contact pin (1) respectively and are touched when being pressed into lock body; When being rotated by the sincere hand of key unlocking or lock, the K3 contact touches.

4. according to claim 1,2,3 described warning devices, it is characterized in that: contact K2 and element R3 constitute the charging circuit of capacitor C; Contact K1 and element C, R2, Q1 constitute the discharge loop of capacitor C; Contact K2 is used for capacitor C is formed short circuit.

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