CN2651371Y - Anti-prizing cross lock core - Google Patents

Abstract

A cross lock core is primarily a lock core structure with perfect burglarproof property. However, after a thief invented a wrench with a tetragonal taper head, the lock core can be damaged to unlock in a few seconds. At present, burglarproof features of the cross lock core has almost been degenerated into a status of existence in name only. Slots and pitches are made on the external lock core through the utility model; meanwhile, with the effects of pins, springs and sealings of the lock core sleeve, any burglar's tetragonal taper-headed wrench cannot let the lock core out and the lock core cannot be damaged either. Thus, the target of protecting the lock and protecting from burglars can be reached.

Description

The anti-pry type cross lock core

The utility model belongs to lock technology field, is a kind of cannelure by exterior key cylinder band hole, and the acting in conjunction of pin, spring and sealing in the lock core cover was lost efficacy thief's pyramid head spanner, thereby reached pick-proof purpose anti-pry type cross lock core.

At present, known cross lock core generally is made of inner key cylinder and exterior key cylinder, and rotation drive inner key cylinder withdraws from exterior key cylinder after key inserts, and lock promptly is unlocked.This lock core is the very good structure of a kind of theftproof originally, but since the thief invented a kind of outside the likeness in form inner hexagon spanner, after its head was the broken lock tool of rectangular pyramid shape, the lock that has this cross lock core was just as illusory.As long as the pyramid of this picklock is partly inserted lock core, firmly one to pull, inner key cylinder just withdraws from once, and lock promptly is opened, and the whole process of unblanking only needs several seconds.

The purpose of this utility model realizes like this: drive a cannelure on exterior key cylinder, the degree of depth of groove is 1/3 of an exterior key cylinder wall thickness, the width of groove is than the big 0.05-0.1mm of head spherical diameter of pin, there is a bottom to become the hole of sphere in the groove, the diameter in hole is identical with the width of groove, the hole becomes the camber line transition with the intersection of groove, the hole the degree of depth be the pin head diameter 2/3, the lock core cover is enclosed within on the exterior key cylinder, each other in movingly, lock core puts and has a step through hole, the groove of this hole on the exterior key cylinder, pin is housed in the hole successively, spring and sealing, sealing will be enclosed in the hole after the length of spring compressed.When key inserts the rotation of inner key cylinder keyhole first, driving exterior key cylinder simultaneously rotates in the lock core cover together, the head of pin then slides in the cannelure of exterior key cylinder, when the process pin head of the hole in the exterior key cylinder cannelure, pin promptly inserts under the effect of spring in the hole, and this moment, the relative position of exterior key cylinder and lock core cover promptly was fixed.

Owing to adopt such scheme, when using key normally to unblank, because exterior key cylinder is by dowel fixes, inner key cylinder moves back outside rotating also under the drive of key, lock promptly is opened, when thief's pyramid head spanner insertion lockhole is firmly pulled, also do not reach lock core when destroyed, the head of pin skids off from the hole, but pin slides in groove all the time, so, though inner key cylinder and exterior key cylinder all rotate synchronously, can not withdraw from the lock core cover, inner key cylinder can not move back from exterior key cylinder at home and abroad yet, lock can not be opened, and finally makes thief's pyramid head spanner entirely ineffective.The utility model can not only guarantee that lock is not opened, and the outstanding advantage of it another is that lock core structure can be not destroyed.

The utility model is described in further detail below in conjunction with drawings and Examples.

1. inner key cylinders, 2. exterior key cylinders, 3. lock cores overlap 6. sealings of 4. pins, 5. springs among the figure

Embodiment: be on 18 millimeters the cross lock core at external diameter, drive a cannelure with interior position along periphery in 1.5 millimeters of distance exterior key cylinder 2 front ends, groove width is got 2.1 millimeters, 1.2 millimeters of groove depths are made a ball impression in groove, cheat dark 1.5 millimeters, near coal-mine diameter is identical with groove width, it is 1 millimeter arc that near coal-mine and the boundary line of groove fall into radius, and lock core cover 3 usefulness aluminums are done, and its endoporus becomes movingly with exterior key cylinder, put out a step through hole at lock core, this hole is over against cannelure, and the outside diameter of stepped hole is 3 millimeters, and end diameter is 2.1 millimeters, pin 4 usefulness brass are made, be shaped as T shape, 2.9 millimeters of its outside diameters, 2 millimeters of bar portion diameters.Bar portion termination becomes sphere, and pin self-locking core retainer plate stepped hole inserts, and refills upper spring 5, and after the stepped hole oral area is with aluminium matter sealing 6 compression springs the aperture is shut.Then key is inserted the keyhole and the rotation of inner key cylinder 1, when near coal-mine in the cannelure of exterior key cylinder during through the pin head, pin promptly inserts in the hole, exterior key cylinder promptly stops operating, this moment, the relative position of exterior key cylinder and lock core cover promptly was fixed, after extracting key, the assembling of anti-pry type cross lock core promptly comes to an end.

Claims (1)

1, a kind of anti-pry type cross lock core is by inner key cylinder, exterior key cylinder, the lock core cover, pin, spring and sealing constitute, it is characterized in that: on exterior key cylinder, have a cannelure, the degree of depth of groove is 1/3 of an exterior key cylinder wall thickness, the width of groove is than the big 0.05--0.1mm of head spherical diameter of pin, there is a bottom to become the hole of sphere in the groove, the diameter in hole is identical with the width of groove, the hole becomes the camber line transition with the intersection of groove, the hole the degree of depth be the pin head diameter 2/3, the lock core cover is enclosed within on the exterior key cylinder, each other in movingly, lock core puts and has a step through hole, the groove of this hole on the exterior key cylinder is equipped with pin successively in the hole, spring and sealing, sealing will be enclosed in the hole after the length of spring compressed.When key inserts the rotation of inner key cylinder keyhole first, driving exterior key cylinder simultaneously rotates in the lock core cover together, the head of pin then slides in the cannelure of exterior key cylinder, when the process pin head of the hole in the exterior key cylinder cannelure, pin promptly inserts under the effect of spring in the hole, and this moment, the relative position of exterior key cylinder and lock core cover promptly was fixed.

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