CN2663599Y

CN2663599Y - Overload unlocking protection device of theftproof lock

Info

Publication number: CN2663599Y
Application number: CN 200320115286
Authority: CN
Inventors: 刘洪贵
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-09
Filing date: 2003-12-09
Publication date: 2004-12-15
Anticipated expiration: 2013-12-09

Abstract

The utility model relates to an overloading protection device used for theft resistant locks. A lock cylinder is provided with a disc rotary sleeve, a disc has a plurality radial holes which are internally provided with a steel column, a spring and a steel ball. If a thief uses dedicated unlocking tools to commit an overloading force unlocking, the steel ball presses the spring to make the spring extend inwards. At such time, the dedicated unlocking tools suffer from rotation and slide, which makes the thief fail to damage a lock by wringing off the lock cylinder by the dedicated unlocking tools, thereby realizing the effect of protecting the lock.

Description

The theftproof lock overload protective device of unblanking

Affiliated technical field:

The utility model relates to a kind of mechanical lock, especially can transship the protective device of unblanking at destructiveness overload can play the protection lock effect when firmly unblanking theftproof lock.

Background technology:

Present known mechanical lock, be to utilize key teeth groove control lock core pellet shot from a slingshot position to unblank, lock core marble uses copper product to make, volume is little, the thief can insert in the keyhole of lock with special tool, uses brute force to reverse lock core, and pellet shot from a slingshot is cut off, destroy lock, make improper the opening of lock and lose anti-theft feature.

Be locked in overload power and destroy the lock core marble technical deficiency in order to overcome existing machinery, the utility model provides a kind of theftproof lock overload protective device of unblanking.The utility model solves its technical problem and adopts technical scheme to be; lock core has a disk turning set; disk is positioned at the lock core top; disk turning set center has keyhole; disk upper edge radial symmetric is distributed with 2 radial holes; the end in hole is reduced into little round tube hole; steel column is housed in the radial hole successively; steel column and radial hole tight fit; steel column pushes against spring; spring pushes against steel ball; steel ball exposes in the small sircle hole of radial hole end and partly; when unblanking if this lock key can conveniently unblank; brute force is unblanked if the thief uses special tool; so steel ball will compress spring and in contract; thief's special-purpose unlocking tool will rotate and skid and can not reverse lock core, and the protection lock core marble can not twist off.The beneficial effects of the utility model are: prevent that the thief from using special tool to twist off lock core marble, has the effect of protection lock.

Description of drawings:

Fig. 1 is the overload protection arrangement part-structure figure of lock of the present utility model

Fig. 2 is the utility model Key structure figure

Among the figure: 1. outer steel sleeve; 2. disk turning set; 3. steel column; 4. spring; 5. steel ball; 6. key circular hole; 7. lock core fixed cover; 8. radial hole; 9. key; 10. plane; (11) the multistage pagoda face of cylinder.

The specific embodiment:

Among Fig. 1 the disk turning set 2. be sleeved on outer steel sleeve 1. with the lock core fixed cover 7. in, be symmetrically distributed with 2 circular radial holes 8. on the disk turning set disk 2., 4. 3. the 8. middle steel column of radial hole push against spring, spring 4. push against steel ball 5. steel column 3. with 8. tight fit of radial hole, radial hole 8. end has a small circular through hole, steel ball 5. in the 8. terminal aperture of radial hole the part expose, disk turning set center 2. be the key circular hole 6..

In Fig. 2 embodiment, be symmetrically distributed with on the 9. terminal face of cylinder of key two planes 10. front end be the multistage pagoda face of cylinder (11).

Claims

1; the theftproof lock overload unblanks to have outer steel sleeve in the protective device; fixed cover; the disk turning set; steel column; spring; the steel ball structural member is characterized in that in the outer steel sleeve of theftproof lock fixed cover being housed fixedly, suit disk turning set movingly in the fixed cover; be radially distributed with one or more circular radial holes on the disk of disk turning set; the radial hole end is reduced into small circular openings, dress steel column in the radial hole, steel column and radial hole tight fit; steel column holds out against spring; the spring top clamping steel ball, steel ball is exposed in the keyhole at disk turning set center in the terminal aperture of radial hole and partly, and disk turning set center is the key circular hole.

2, the theftproof lock according to claim 1 overload protective device of unblanking is characterized in that the key front end of locking is the multistage pagoda shape face of cylinder; branch has 1 to a plurality of planes on the key tip face of cylinder; plane quantity equates that with the radial hole quantity of the disk turning set of lock the plane on the key tip face of cylinder is relative with radial hole direction on the lock disk turning set.