CN2368925Y - Self locking device of door lock - Google Patents

Abstract

The utility model relates to a door lock, which is composed of a lock body, a lock core, a lock tongue, a gear shaft, a gear, a clutch piece, a safety buckle and a resetting spring, wherein, the gear and the clutch piece are respectively arranged on the gear shaft, the safety buckle is arranged on a lock column, and the resetting spring is arranged on the safety buckle. The utility model is characterized in that when the door lock is closed and locked, a lock latch rack can be simultaneously and automatically buckled so that the lock can not be prized to achieve the purpose of optimal anti-theft effect.

Description

A kind of door lock self-locking device

The utility model relates to a kind of lock, particularly a kind of self-locking device of impact type automatic door lock.

Existing door lock kind is a lot, can not lock but majority is locked in its dead bolt of back of locking, as long as just stir a certain dead bolt or the lock bolt door is easy to be opened, be difficult to play antitheft effect.

The purpose of this utility model is to provide a kind of automatic self-locking device, make door lock close lock after the dead bolt of this lock foolproof apparatus that can automatically lock.

In order to achieve the above object, the utility model is achieved like this: this door lock self-locking device comprises lock body, lock core, dead bolt, gear shaft, gear, clutch-plate, safety fastener and back-moving spring.Gear and clutch-plate are contained in respectively on the gear shaft, and safety fastener is contained on the lock, and back-moving spring is located on the safety fastener.When door was locked, safety fastener can fasten the lock bolt tooth bar automatically, needed when opening to get final product with key or turn inside door handle.

The good effect of the utility model door lock self-locking device is: this device can make door lock close lock in because the effect of spring makes safety fastener fasten lock bolt automatically, reach best anti-theft effect.

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is the structural representation of the utility model specific embodiment.

By shown in Figure 1, the utility model door lock self-locking device is made up of lock body (not shown), lock core (not shown), dead bolt (not shown), gear shaft 1, gear 2, clutch-plate 3, safety fastener 4 and back-moving spring 5.Lock body, lock core, dead bolt do not belong to inventive point of the present utility model, so do not elaborate.Gear 2 is contained in respectively on the gear shaft 1 with clutch-plate 3, and safety fastener 4 is enclosed within on the lock 7, and back-moving spring 5 is located on the safety fastener 4.Its safety fastener 4 fastens lock bolt tooth bar 6 automatically under the effect of back-moving spring 5 when locking when door is being closed, and when not rotational lock core or handle, this lock can not be opened; During as normal unlatching, as long as rotational lock core or handle, clutch-plate 3 is rotated thereupon,, can open just lock with being enclosed within safety fastener 4 tops on the lock 7 from lock bolt tooth bar 6 with the rotation of lock core or gear shaft 1.

Claims (1)

1, a kind of door lock self-locking device, it comprises lock body, lock core, dead bolt, it is characterized in that: gear (2) is contained in respectively on the gear shaft (1) with clutch-plate (3), along with the rotation of lock core or gear shaft (1) is rotated clutch-plate (3) thereupon, the safety fastener (4) that will be enclosed within on the lock (7) pushes up from lock bolt tooth bar (6), and is provided with back-moving spring (5) on safety fastener (4).

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