CN2446221Y - Voice signal anti-picking lock - Google Patents

Abstract

The utility model relates to a voice signal anti-picking lock, which is characterized in that a round hole is drilled on a lock tongue in an existing lock shell following the extending direction of the lock tongue, a contact pin which can drive a movable contact to move is arranged in the hole, and both ends of the contact pin are respectively affected by a lever spring inside the lock shell and a space limited spring inside a twistlock box. When the lock is prized, resilience of the space limited spring to the contact pin is attenuated, the lever spring impels the contact pin to cause the movable contact and a fixed contact arranged on the lock shell to be closed (or separated), and an alarm system circuit is switched on and starts to give alarms. The lock is applicable to being used for various house doors, storehouse doors and safe doors, particularly for places where things have easily been stolen at night, and antitheft effects are better.

Description

The audio communication pick-proof lock

The utility model relates to a kind of active force and the in good time open and close alarm of theory of mechanics energy of reaction force and audio communication pick-proof lock of doorbell that utilizes bar thick stick and spring.

Phenomenon often takes place to be prized in existing common door lock, and this is not that door lock is not firm, and its main reason is that common door lock can not send the sound when being prized.Begin to install for addressing this problem people that the very high iron of price is anti-forces open the door, or on a door many door locks are installed, promptly uneconomical, trouble is not attractive in appearance yet again, so developed the audio communication pick-proof lock in person.

Can in time send alarm sound when the purpose of this utility model makes door lock be prized exactly, make be case person stop the crime.

The utility model is achieved in that this lock has lock housing and keeper, has dead bolt in the lock housing.On dead bolt, bore hole, a garden along the direction that dead bolt is flexible, adorn a contact pilotage that can drive the armature contact motion in the hole, this armature contact is corresponding with the fixed contact on being contained in lock housing, and this communicates with two electrodes of alarm respectively to the contact.Also have an arm spring in the lock housing, this spring intermediate support is contained on the dead bolt, and two fulcrum acts on respectively on lock housing and the contact pilotage.In addition, with the corresponding keeper of contact pilotage in, a limit spring is housed.When being prized with the door of this lock keyed, the crack between a door and its frame gap does not become big because dead bolt is not retracted into lock housing, limit spring weakening in the keeper to contact pilotage elastic force, the arm spring of the contact pilotage other end just promotes contact pilotage, fixed contact closure (or separation) on contact pilotage drives armature contact and is contained in lock housing, alarm circuit is switched on, and begins to report to the police; If the door lock of keyed is not prized, but normal the unlatching just dead bolt is being with contact pilotage to move back in the lock housing, can not change separation (or closed) relation of pair of contact, so can not report to the police.

The utility model is only locked in common door and has been set up the cover alarm of switch in good time, simple structure, economic, practical.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the sectional view of the utility model audio communication pick-proof lock.

Fig. 2 is the A portion enlarged drawing of Fig. 1.Among the figure 1, fixed contact 2, armature contact 3, alarm 4, lock housing 5, dead bolt 6, contact pilotage 7, limit spring 8, keeper 9, arm spring 10, bell button

When this lock was locked, dead bolt (5) drove the protruding keeper (8) that inserts simultaneously of contact pilotage (6).At this moment, contact pilotage (6) is an also extended segment distance under the elastic force of arm spring (9), stops but front end is subjected to the elastic force of limit spring (7), can not stretch out preparation alarm condition that Here it is.If at this moment there is the people to force open the door, crack between a door and its frame is increased, just certainly will reduce the elastic force of limit spring (7), just make contact pilotage (6) protruding under the effect of arm spring (9) contact pilotage (6), make armature contact (2) and fixed contact (1) closure, alarm (3) begins to report to the police.The course of work of the present utility model that Here it is.

Alarm (3) can also be made doorbell by bell button (10) and use.

Claims (1)

1. A kind of audio communication pick-proof lock, lock housing (4) is arranged, dead bolt (5) is arranged in the lock housing (4), and keeper [8], it is characterized in that: on dead bolt (5), bore hole, a garden along the direction that dead bolt is flexible, adorning one in the hole can be with the contact pilotage (6) of armature contact (2) motion, this armature contact (2) is corresponding with the fixed contact (1) on being contained in lock housing (4), and this communicates with two electrodes of alarm [3] respectively to the contact; Also have an arm spring (9) in the lock housing, intermediate support is contained on the dead bolt (5), and two fulcrum acts on respectively on lock housing (4) and the contact pilotage (6); In addition, with the corresponding keeper of contact pilotage (6) (8) in, a limit spring (7) is housed.

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