CN2408189Y - Spring lock - Google Patents

Abstract

The utility model discloses a cylinder lock which is composed of a lock body and a lock core, wherein, the mutual space of the lock body and the cylinder holes of the lock core are made into at least one which is no less than the diameter of the cylinder holes. Therefore, the utility model can avoid a social lawbreaker using a self-made comb-shaped common key to unlock a lock and enter a room to commit a crime and improves the anti-theft function of the lock.

Description

A kind of cylinder lock

The utility model relates to lock, particularly a kind of cylinder lock that can prevent that the lawless person from opening with the comb shape common key.

No matter existing commercially available cylinder lock is bright lock or built-in lock, and its basic structure all is to be made of lock body and the lock core that can rotate in lock body, and the lock core locking is promptly locked by different link gear locks, and lock core rotates, and lock promptly is opened.The locking of lock core and rotation are then realized by the shift in position of pellet shot from a slingshot in the pellet shot from a slingshot hole of spring and key control.When the pellet shot from a slingshot in the lock body leaned on the elastic force of spring to make its front portion stretch in the lock core marble hole, lock core can not rotate, and locks locked; Key is inserted in the lockhole of lock core, the teeth groove of key then compresses the pellet shot from a slingshot in the lock core marble hole backward, and the front end face of the whole pellets shot from a slingshot in the lock body is retracted on the interface of lock body and lock core, and lock core is promptly rotatable, and lock is opened.

Existing this cylinder lock has a very big careless omission in design, be exactly lockhole lateral depth in the lock core all greater than the radius (being generally 2/3rds) of lock core, the spacing in each pellet shot from a slingshot hole is all less than the straight warp in pellet shot from a slingshot hole.This with regard to utilize own special comb shape common key to unblank to enter the room to lawless person in the society crime provides may.

So-called comb shape common key, the total-width ratio original key width of using a stalloy (as manual saw blade) to make exactly is narrow, tooth depth equals or is slightly larger than pellet shot from a slingshot hole length in the lock core, and the facewidth is slightly less than the pellet shot from a slingshot bore dia, the arranging and pellet shot from a slingshot hole site corresponding side's stripping fork shape hardware of tooth.Existing cylinder lock, so long as same specifications and models, the size in its lock body, lock core, lockhole and pellet shot from a slingshot hole is identical, only depends on the different size assembled arrangement of one group of pellet shot from a slingshot in the lock core to make with different key operated differences lock.So, insert any one in the cylinder lock lockhole of these specifications and models with the above-mentioned comb shape common key of a certain specifications and models of correspondence, hold the shank of the key to left translation, the square shaped teeth in corresponding each the pellet shot from a slingshot hole of this common key be about to pellet shot from a slingshot in the lock core along the pellet shot from a slingshot hole to left translation, because tooth depth equals or is slightly larger than the lock core marble hole length, so can the pellet shot from a slingshot in the lock core all be passed in the pellet shot from a slingshot hole of lock body simultaneously.In case the end face of square tooth arrives on the interface of lock core and lock body, lock core promptly is disengaged lock-out state, and key joins same lock core, and lock promptly is opened.Therefore, its anti-theft feature of existing cylinder lock is dissatisfactory.

The purpose of this utility model is improved above-mentioned prior art, and a kind of cylinder lock that can effectively prevent with above-mentioned comb shape common key unlatching is provided, thereby improves the anti-theft feature of cylinder lock.

The purpose of this utility model can be achieved through the following technical solutions.

Keep the structure of existing cylinder lock constant substantially, only make the mutual spacing in pellet shot from a slingshot hole have a diameter that is not less than the pellet shot from a slingshot hole at least.

With the cylinder lock that such scheme is made, can make that to utilize above-mentioned common key to unblank impossible.This be because, this lock is owing to have at least a pellet shot from a slingshot pitch of holes to be not less than the diameter of pellet shot from a slingshot, want to drive this type of lock,, just must make backlash that should spacing is not less than billiards diameter in order to make corresponding each pellet shot from a slingshot hole of each side tooth with above-mentioned key, such key is when lockhole injects, at least one pellet shot from a slingshot will take place be stuck in this gap, cause common key to advance, move back to come out again, make this key malfunctioning, lock is also scrapped.

The embodiment that provides below in conjunction with accompanying drawing is further described the utility model.

Fig. 1 adorns the existing cylinder lock of five pellets shot from a slingshot by the principle schematic (broken section) of above-mentioned comb shape common key unlatching in being;

The partial sectional view of the cylinder lock that Fig. 2 provides for the utility model.

See figures.1.and.2, the lockhole 9 of the lock core 8 of existing cylinder lock is offered along a side of lock core, its lateral depth is all greater than lock core radius (generally about 2/3rds), lock body 2 is identical with pellet shot from a slingshot hole 7 diameters in the lock core, evenly distribute up and down, spacing 6 equates, the lock spring outer end of hole is shut by bonding jumper 5, built-in spring 4, when above-mentioned comb shape common key 10 is inserted lockholes and is moved left to that the increment face supports lock core and lockhole interface among the figure, although five pellets shot from a slingshot, the 1 length difference in the lock core all joins with the pellet shot from a slingshot in the lock body 3 and headed in the lock marble hole, lock core is in rotatable state.And adopt the cylinder lock of second pellet shot from a slingshot pitch of holes from bottom to top shown in Figure 2 greater than billiards diameter, and will cause with above-mentioned comb shape common key malfunctioningly, principle is not being given unnecessary details.

Existing various cylinder locks anti-theft feature after the technical scheme that the utility model provides is improved will greatly improve.

Claims (1)

1, a kind of cylinder lock is made of lock body (2) and lock core (8), and it is characterized in that: the mutual spacing (6) in the pellet shot from a slingshot hole (7) of this lock has a diameter that is not less than the pellet shot from a slingshot hole at least.

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