CN2349313Y

CN2349313Y - Theft-proof alarm lock capable of identifying key teeth shape

Info

Publication number: CN2349313Y
Application number: CN 98246358
Authority: CN
Inventors: 颜群
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-11-11
Filing date: 1998-11-11
Publication date: 1999-11-17
Anticipated expiration: 2008-11-11

Abstract

The utility model has the advantages of simple structure and low cost, and can precisely regulate time to second. The utility model relates to a theft-proof alarm lock which is capable of identifying the shape of key teeth. A conducting rod connected with a marble is arranged at the upper end of each spring in a common marble lock; each conducting rod is provided with two insulating sections; the conducting rod penetrates in a hole of a conductive plate; the conductive plate is connected in series with a power supply, a time delay relay, an alarm, and a lock body. When no key is inserted, each conducting rod is connected with the conductive plate through the upper insulating section; when a matched key is inserted, each conducting rod is contacted with the conductive plate through the lower insulating section; at this time, the circuit is not switched on, and the alarm does not send alarm. In addition, when any non-matched key is inserted, the alarm can send alarm to cause a person to stop unlocking the lock. The utility model has the advantages of easy fabrication and high sensitivity.

Description

Can discern the anti-theft alarm lock of shaped as key bit

The utility model relates to a kind of lock, specifically, is the anti-theft alarm lock that can discern shaped as key bit.

Existing anti-theft alarm lock great majority all are just to report to the police when lock goes to pot, at this moment, since very short from the complete ruined time of lock, the saboteur is succeeded easily.

The purpose of this utility model is a kind of anti-theft alarm lock that can discern shaped as key bit of invention.When non-valid key is inserted lockhole, just report to the police, borrow alert renown to fear the person of unblanking, make it stop its behavior.

The utility model is to realize purpose of design like this.

The utility model is made up of the common spring lock.

Architectural feature of the present utility model is:

A: the conductive bar that links to each other with pellet shot from a slingshot is equipped with in the spring upper end in common spring lock lock body;

B: all be equipped with on each conductive bar:

A, when no key inserts, the last insulating segment that contacts with conductive plate,

B, when valid key is inserted, the following insulating segment that contacts with conductive plate,

C, every conductive bar all are inserted in the hole of conductive plate respectively;

D, conductive plate and power supply, time-delay relay, alarm, lock body are connected into the loop.

During use, if there is non-valid key to insert lockhole, because non-valid key is different with the profile of tooth of valid key, must have nonisulated of a certain conductive bar and contact with conducting strip, at this moment, the circuit turn-on at alarm place, alarm sends alert sound, and order the person of unblanking stop, and extracts key.At this moment because the last insulating segment of every conductive bar contacts with conducting strip, so alarm buzzer place circuit disconnects, alert sound stops.For preventing when valid key is unblanked, because tooth size discrepancy before and after the key,, changed the upper-lower position of conductive bar and caused warning when certain key bit during through pellet shot from a slingshot down.The utility model is equipped with time-delay relay in the circuit of alarm place, make the circuit of instantaneous conducting can not cause warning.The utility model can be discerned profile of tooth, warning sensitivity height effectively.

Accompanying drawing is the utility model schematic diagram.

Among the figure, 1, lock core, 2, key, 3, key bit, 4, power supply, 5, insulating segment down, 6, go up insulating segment, 7, time-delay relay, 8 alarms, 9, conductive plate, 10, conductive bar, 11, spring, 12, go up pellet shot from a slingshot, 13, pellet shot from a slingshot down, 14, lock body.

Below in conjunction with accompanying drawing one non-limiting examples is illustrated.

Embodiment:

Common spring lock body 14 and power supply 4, alarm 8, conductive plate 9, time-delay relay 7 are connected into the loop; On each spring 11 in the lock body 14 conductive bar 10 is housed respectively; Last insulating segment 6 and following insulating segment 5 are all arranged on the every conductive bar 10; Every conductive bar 10 all is inserted in the respective aperture of conductive plate 9; When valid key insertion key bit was contacted with the following pellet shot from a slingshot 13 at this place, following insulating segment 5 contacted with conductive plate 9, and circuit disconnects, and does not produce warning; When key was extracted, following pellet shot from a slingshot 13 fell, and the last insulating segment 6 of conductive bar 10 contacts with conductive plate 9, and circuit still disconnects, and does not produce warning; Time-delay relay 7 is designed to connect the back delay at circuit and does not produce warning 1 second, to prevent that the following pellet shot from a slingshot 13 of running into the back owing to key bit in front produces false alarm in the process of valid key insertion lockhole.Like this, when non-valid key was inserted lockhole, because the height difference of profile of tooth will be connected with conductive plate 9 for nonisulated section of conductive bar 10, circuit was also connected, and produces to report to the police.

The utility model is made easily, and is easy for installation, can produce simultaneously with lock, also can transform original lock.

Claims

1, a kind of anti-theft alarm lock that can discern shaped as key bit is made up of the common spring lock, it is characterized in that:

The conductive bar (10) that links to each other with pellet shot from a slingshot is equipped with in A, the upper end of the spring (11) in common spring lock lock body (14);

B, each conductive bar all are equipped with on (10):

A, when no key inserts, the last insulating segment (6) that contacts with conductive plate (9),

B, when valid key is inserted, the following insulating segment (5) that contacts with conductive plate (9),

C, every conductive bar (10) all are inserted in the hole of conductive plate (9) respectively;

D, conductive plate (9) are connected into the loop with power supply (4), time-delay relay (7), alarm (8), lock body (14).