CN201874320U - Safety device of lock tongue - Google Patents

Abstract

The utility model discloses a safety device of a lock tongue, which comprises a lock box, a lock tongue protecting cover, a lock box cover and a torsion spring, wherein the torsion spring comprises a fixed edge and a movable edge, the movable edge and the fixed edge of the torsion spring penetrate through a through hole on the side wall of the lock tongue protecting cover and stretch into the lock tongue protecting cover, and the fixed edge is positioned at the bottom part of the lock box. A pin column which is used for pushing the movable edge to move up and down is arranged above the movable edge, penetrates through the lock tongue protecting cover and stretches out of the lock box. The safety device is simple in structure and high in safety performance, and the lock tongue cannot be unlocked by virtue of the characteristic of the torsion spring when a coded lock is destroyed, so that the aim of improving the safety and reliability of the coded lock is achieved.

Description

A kind of dead bolt safeties

Technical field

The utility model relates to the door lock field, a kind of dead bolt protective device of locking especially for mechanical cipher.

Background technology

Door lock generally comprises lock core, dead bolt and lock box, can realize the breakdown action of door in the time of in dead bolt is return lock box.The precision optical machinery coded lock comprises lock core, dead bolt and lock box equally, drives the lock core rotation by rotating the hand wheel shaft that is connected with lock core, thereby the promotion dead bolt stretches out or returns lock box, realizes the closure and the unlatching of door lock.But, be subjected to external force to be forced to open to prevent door because the self property of mechanical code lock must have strong safeguard measure.Promptly when lock core is subjected to external force destroyed, need a kind ofly can protects dead bolt not to be struck and return in the lock box, and guarantee the protective device that door is not unlocked.

Chinese patent

200620062770.X disclose a kind of dead bolt safety device, be respectively to be provided with one crashproof in the both sides of dead bolt, an end of crashproof is fixed in the hole on the dual-side of dead bolt liner plate upper lock tongue hole, and the other end is fixed in bottom two preset holes of inner tongue tube.This dead bolt safety device just can guarantee when the dead bolt damage that can not deform when receiving more radially impact; but in the time of can't preventing that at all whole lock core from suffering outside destroy; in the time of particularly will protecting the lock box cover of lock core to be opened; the possibility that dead bolt can be destroyed easily, so safety is relatively poor.

The utility model content

The utility model technical issues that need to address provide a kind of security performance height, can prevent a kind of protective device that mechanical code lock suffers external impacts, dead bolt still can intact shutter be opened when lock core was destroyed.

For solving the problems of the technologies described above, the technical scheme that the utility model adopted is:

A kind of dead bolt safeties, comprise lock box, lock box cover and be positioned at the dead bolt protecting cover that slides for dead bolt of lock box, side below the dead bolt protecting cover is provided with torsion spring, the active edges of torsion spring is passed the via hole of dead bolt protecting cover sidewall and is stretched in the dead bolt protecting cover, described fixed edge is positioned at the bottom of lock box, the top of active edges is provided with the pin that is used to promote the active edges motion, and pin is arranged on dead bolt protecting cover one side; Torsion spring pin under nature stretches out lock box.

Improvement of the present utility model is: the length that described pin stretches out lock box cover is corresponding with the displacement of active edges in via hole.

Of the present utility modelly further be: described torsion spring is arranged on the lock box bottom by bearing pin.

Improvement of the present utility model also is: the bottom surface of described pin is provided with and torsion spring active edges corresponding grooves.

Because the technological progress of having adopted technique scheme, the utility model to obtain is:

The utility model is simple in structure, the security performance height, and when utilizing the characteristic of torsion spring can protect the lock core of coded lock destroyed well, dead bolt still can not be opened, and then reaches the purpose of the security reliability that improves coded lock.The active edges that can make torsion spring that is provided with of pin bottom recesses embeds in the groove, guarantees that further the phenomenon that torsion spring can not take place to rock back and forth takes place, and has improved stability.

Description of drawings

Fig. 1 is a sectional view of the present utility model.

Wherein: 1. lock box, 2. dead bolt protecting cover, 3. bearing pin, 4. torsion spring, 5. via hole, 6. pin, 7. lock box cover.

The specific embodiment

Below in conjunction with accompanying drawing the technical solution of the utility model is described in further details:

Fig. 1 is a kind of dead bolt safeties, comprises lock box 1, lock box cover 7, dead bolt protecting cover 2 and torsion spring 4.Dead bolt protecting cover 2 is positioned at lock box 1, is used for sliding for dead bolt.

One side of dead bolt protecting cover 2 is provided with torsion spring 4, and torsion spring 4 is positioned at the below of dead bolt protecting cover 2, is fixed on the lock box bottom by bearing pin 3.

Torsion spring 4 comprises fixed edge and active edges, and the active edges of torsion spring and fixed edge all pass the via hole 5 of dead bolt protecting cover 2 sidewalls, and extend in the dead bolt protecting cover 2.Wherein, fixed edge is positioned at the bottom of lock box, and the top of active edges is provided with pin 6, is used to promote active edges and moves up and down.The bottom surface of pin 6 is provided with groove, and the active edges of torsion spring is embedded in the groove, prevents that active edges from shaking.Dead bolt protecting cover 2 is passed in the upper end of pin 6, and torsion spring is when nature, and pin 6 stretches out lock box 1, and the length that pin 6 stretches out lock box cover is corresponding with the displacement of active edges in via hole 5.

When the utility model normally uses, lock box cover is fixed on the lock box by screw, pin promotes the active edges of torsion spring downwards under the intervention of lock box cover, make torsion spring be in compressive state, and this moment, active edges was positioned at via hole bottom, can not influence the turnover of dead bolt.When lock core is subjected to outside destroy; lock box cover is opened; torsion spring is owing to lost lock box cover by the pin applied pressure; active edges pops up; make torsion spring return to normal condition; this moment, active edges was positioned at the top of via hole, can not return thereby block dead bolt, had further protected the door body not to be unlocked.

Claims (4)

1. dead bolt safeties, comprise lock box (1), lock box cover (7) and be positioned at the dead bolt protecting cover (2) that slides for dead bolt of lock box (1), it is characterized in that: the side in dead bolt protecting cover (2) below is provided with torsion spring (4), the active edges of torsion spring is passed the via hole (5) of dead bolt protecting cover (2) sidewall and is stretched in the dead bolt protecting cover (2), described fixed edge is positioned at the bottom of lock box, the top of active edges is provided with the pin (6) that is used to promote the active edges motion, and pin (6) is arranged on dead bolt protecting cover (2) one sides; Torsion spring (4) pin (6) under nature stretches out lock box (1).

2. a kind of dead bolt safeties according to claim 1 is characterized in that: the length that described pin (6) stretches out lock box cover is corresponding with the displacement of active edges in via hole (5).

3. a kind of dead bolt safeties according to claim 1 is characterized in that: described torsion spring is arranged on lock box (1) bottom by bearing pin (3).

4. a kind of dead bolt safeties according to claim 1 is characterized in that: the bottom surface of described pin (6) is provided with and torsion spring active edges corresponding grooves.

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