CN2397215Y - Double safety bullet latch for door - Google Patents

Abstract

The utility model discloses a bullet lock with double safety for a door, which comprises a lock casing, a lock buckle, a lock tongue, a lock tongue sliding mechanism, etc., wherein, the sliding inclined surface of the lock tongue is longitudinally provided with safe slots which have a plurality of rows and each row is staggered with each other. The lock has the advantages of strong anti-prizing performance and safety guarantee with the safe slots on the lock tongue even if the safety of the lock is forgot to open, and can be widely used for buildings, such as households, office buildings, etc.

Description

The dual fail-safe pin tumbler lock

The utility model relates to a kind of lock, specifically a kind of dual fail-safe pin tumbler lock.

The dual fail-safe pin tumbler lock still is widely used in the buildings such as family, office building at present, is mainly used in the sealed of wooden door.The cross section of its dead bolt is triangular in shape, on the dead bolt and the sliding bevel between the snap close edge be a plane.Lock can be protected internally, and what also have can insure lock from the outside, and " ox head board " 1939-1 two that produces as Qiujing Lock Maker, Shanghai insures pin tumbler lockes, but the key turns keyhole need be used behind the door in each pass, and is pretty troublesome, also forgets easily.When the insurance of dual fail-safe pin tumbler lock was not protected upward, human one steel disc outdoors even identity card just can slide into along the sliding bevel that is pasting on the dead bolt at the fore shaft place of door, stir dead bolt and deviate from snap close, thereby force open the door, and the safety of lock is relatively poor.

The purpose of this utility model is to provide the dual fail-safe that a kind of pick-proof is strong, safety is good pin tumbler lock.

For achieving the above object, dual fail-safe pin tumbler lock of the present utility model comprises lock housing, snap close, dead bolt, dead bolt slide mechanism etc., vertically offers safety groove on the sliding bevel of described dead bolt.

Above-mentioned dual fail-safe pin tumbler lock, the safety groove of offering on the sliding bevel of described dead bolt has two rows at least, and described respectively row between safety groove staggered mutually.

Owing to adopted technique scheme, shut when door and locked insurance when not protecting, if someone is wanting to pry open door from the slotting inward steel disc of fore shaft, identity card or similar item outdoors, steel disc or identity card can at first be run into the safety groove on the inclined-plane when the sliding bevel along dead bolt slides, at this moment it will be blocked by safety groove, thereby can not be sliding inward along the sliding bevel continuation of dead bolt again.It does not skid off snap close with regard to there being enough strength to stir dead bolt like this, thereby can not force open the door.Therefore its pick-proof is strong, also can utilize the safety groove on the dead bolt to guarantee its safety even forget that protecting insures for the moment.

Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail.

Fig. 1 is an external structure schematic diagram of the present utility model;

Fig. 2 is the structural representation of dead bolt and slide mechanism thereof in the utility model;

Fig. 3 is the stereogram of dead bolt among the embodiment;

Fig. 4 is the lateral view corresponding to the dead bolt of Fig. 3;

Fig. 5 is the sliding bevel elevation of dead bolt among Fig. 3.

The lock housing of dual fail-safe pin tumbler lock of the present utility model, snap close and dead bolt slide mechanism etc. are identical with existing door lock, just the sliding bevel of dead bolt have been done improvement.As shown in the figure, on the lock housing 1 of dual fail-safe pin tumbler lock, be provided with release knob 2 and stop button 3, the slide mechanism of dead bolt 4 comprises Metallic rod 5, sliding metal sheet 6, rod end sheet metal 7, stator 8 and spring 9 etc., vertically offers safety groove 11 on the sliding bevel 10 of dead bolt 4.Safety groove 11 can have one or more, also can be single row or multiple rows.As Fig. 3, Fig. 4 and shown in Figure 5, safety groove 11 has three rows, and outside two row's safety grooves 11 are parallel to each other, and middle row's safety groove 11 staggers mutually with outside two row's safety grooves 11.Four safety grooves 11 are arranged in every row's safety groove 11.Safety groove 11 is near the outside of sliding bevel 10.Owing to set up safety groove 11, for conveniently closing the door, the gradient at snap close edge can suitably increase on the snap close, and is at 45 as making, so that the relative slip between sliding bevel 10 and snap close edge on the dead bolt 4 at closing time.

Claims (5)

1, dual fail-safe pin tumbler lock comprises lock housing, snap close, dead bolt, dead bolt slide mechanism etc., it is characterized in that, vertically offers safety groove on the sliding bevel of described dead bolt.

2, dual fail-safe pin tumbler lock as claimed in claim 1 is characterized in that, the safety groove of offering on the described dead bolt sliding bevel has two rows at least, and described respectively row between safety groove staggered mutually.

3, dual fail-safe pin tumbler lock as claimed in claim 1 or 2 is characterized in that, described safety groove is near the outside of dead bolt sliding bevel.

4, dual fail-safe pin tumbler lock as claimed in claim 1 or 2 is characterized in that, the gradient at snap close edge increases on the described snap close.

5, dual fail-safe pin tumbler lock as claimed in claim 4 is characterized in that, the gradient at snap close edge is 45 ° on the described snap close.

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