CN2081860U

CN2081860U - Anti-theft bicycle lock

Info

Publication number: CN2081860U
Application number: CN 90219511
Authority: CN
Inventors: 阎慧魁
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-10-11
Filing date: 1990-10-11
Publication date: 1991-07-31

Abstract

The utility model discloses an anti-burglary lock for a bicycle, which comprises a lock cover, a lock bolt, a lock bolt wrench, a return spring, a lock body which is firmly fixed in the lock cover and a lock bolt smooth bore which prevents the return spring and the lock bolt from broken off and bending. The front and the back ends of the lock bolt are respectively provided with a clamping groove which is directly clamped with an iron core in the lock body and a cross-piece which is unable to be pulled out from the smooth bore. When the lock is locked, the lock core directly clamps the lock in the lock body. The lock body, the lock bolt and the smooth bore form a closed ring. The closed ring is difficult to destroy if any point of the lock cover is broken open by ordinary tools such as knives, tongs, etc., which can not make the lock miss in action with higher theft protection performance.

Description

Anti-theft bicycle lock

The utility model relates to a kind of bicycle lock that has improved.

Existing bicycle lock mainly comprises lock housing, locking bolt, locking bolt spanner, return spring and the key switch that is made of lock body and lock core.It is sealed mostly to be to utilize the related fastening mechanism of lock core to block locking bolt to realize.Because fastening mechanism and locking bolt all directly are contained in the lock housing, prying open lock housing just can destroy fastening mechanism and locking bolt easily (as locking bolt and return spring are disconnected, and the bending locking bolt can be opened lock), and the lock housing of lock is very easily pried open, so the bicycle lock of this kind structure does not have the effect of burglary insurance.

Even the purpose of this utility model is to provide a kind of anti-theft bicycle lock that also is difficult to destroy fastening mechanism and locking bolt that lock housing is pried open.

The purpose of this utility model is achieved through the following technical solutions: it comprises locking bolt spanner, the return spring of lock housing, locking bolt, connection locking bolt and is fastened on the lock body in the lock housing and prevents return spring with locking bolt is fractureed, the locking bolt smooth bore of bending, the two ends of this smooth bore are pressed into flat and thin mouth respectively, flat end and lock body are connected, the locking bolt front and back ends have respectively directly with lock body in the draw-in groove that blocks mutually of lock core and locking bolt can be free to slide but the strut rail that can not extract out in smooth bore.When sealed, drive locking bolt by the locking bolt spanner and enter in the lock body, the draw-in groove of locking bolt front portion is directly blocked mutually with lock core in the lock body.Have only the key rotation lock core of using, make it to leave the draw-in groove on the locking bolt, locking bolt just automatically resets under the effect of return spring.

The utility model is because lock core directly blocks locking bolt in lock body, even therefore the robber pries open lock body place shell and can not destroy this fastening mechanism, and after sealed, constitute the ring of a sealing by lock body, locking bolt and locking bolt smooth bore, pry open lock housing with general purpose tools such as cutter, pincers at any one and all be difficult to the ring of this sealing is destroyed, promptly can not make lock core ineffective.

The utility model is described in further detail below with reference to accompanying drawing:

Fig. 1 is the structural representation of lock when sealed.

Partial view when Fig. 2 opens for lock.

With reference to Fig. 1-2, the utility model is made up of lock housing 3, locking bolt 2, locking bolt smooth bore 1, locking bolt spanner 4, return spring 11, lock body 9, lock core 5.Locking bolt smooth bore 1 is bent by a thin iron pipe and forms, its two ends are pressed into flat and thin mouth respectively, flat end and lock body 9 usefulness holding pins 10 are connected, the front and back end of locking bolt 2 be respectively equipped with lock body 9 in the draw-in groove that blocks mutually of lock core 5 12 and prevent that it from extracting the strut rail 13 of smooth bore 1 out, the two ends of return spring 11 are connected in respectively on the strut rail 13 of flat end in the smooth bore 1 and locking bolt 2, spring fastener 6 is installed in the lock body 9, and when locking bolt 2 indentation lock housings (when lock is opened), this fastener 6 blocks lock core.The indentation, there of corresponding lock core 5 bottoms is put a spring head part 8 in lock body 9, and when locking bolt 2 injected lockhole, lock core 5 turned clockwise under the effect of this spring head part automatically, blocks locking bolt, realized locking action.Sequence number 7 among the figure is for being located at the row of one in lock body snap, and lock body 9 is connected the back this snap is also played a protective role with smooth bore 1.

Claims

1, a kind of anti-theft bicycle lock, it comprises lock housing, locking bolt, the locking bolt spanner of connection locking bolt, return spring, it is characterized in that also further comprising and be fastened on the lock body in the lock housing and prevent return spring with locking bolt is fractureed, the locking bolt smooth bore of bending, the two ends of this smooth bore are pressed into flat and thin mouth respectively, flat end and lock body are connected, the locking bolt front and back ends have respectively directly with lock body in the draw-in groove that blocks mutually of lock core and locking bolt can be free to slide but the strut rail that can not extract out in smooth bore.

2, a kind of anti-theft bicycle lock as claimed in claim 1, it is characterized in that in the described lock body that is fastened in the lock housing except being provided with lock core, snap, also be provided with when lock and block the spring fastener of lock core when opening and when locking the spring head part that lock core turns clockwise automatically and blocks locking bolt when sealed.