CN2166193Y

CN2166193Y - Anti-theft lock for bicycle

Info

Publication number: CN2166193Y
Application number: CN 93224015
Authority: CN
Inventors: 陈子洪
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-07
Filing date: 1993-09-07
Publication date: 1994-05-25
Anticipated expiration: 2003-09-07

Abstract

The utility model relates to an anti-theft lock for a bicycle. After the front fork of a bicycle is rotated a definite angle, a lock rod installed outside the shaft pipe of the vertical shaft of the front fork of the bicycle and a lock body fixed in the transverse hole of the front fork of the bicycle are locked to be fixed, and the lock rod is connected with a clamping head on the bottom end of a marble lock core in the lock body by a ring groove on the lower end of the lock rod. Thereby, after the anti-theft lock for a bicycle is arranged, the lock rod and the lock body can not be separated, and the front fork of the bicycle can not be freely rotated. The anti-theft lock for a bicycle has the advantages of simple structure, convenient use, strong anti-theft performance, etc.

Description

Anti-theft lock for bicycle

The utility model relates to a kind of anti-theft lock for bicycle.

Bicycle Chang Yinqi lock is easily pried open and is stolen by the people.Then the bicycle lock than traditional is firm for a kind of theftproof lock that front fork rotation certain angle is locked, and theftproof increases.The structure of this theftproof lock is made up of with the steel bowl that is fixed on outside, car tripod front fork vertical shaft central siphon lower end the lock and the locking bar that are installed in the front fork cross-drilled hole.When locking, the locking bar in the lock upwards inserts under the steel bowl in the corresponding lockhole in lower end.Like this, front fork with regard to locked can not free rotation.But, after this theftproof lock is locked, after the fastening screw in the Handlebar of bicycle inserted link unscrews, the steel bowl of tripod front fork vertical shaft central siphon lower end is also along with mentioning, thereby the lockhole on the steel bowl just be connected the front fork cross-drilled hole on locking bar separate, this lock is just ineffective, and therefore, the theftproof of this lock is also relatively poor.

The purpose of this utility model is exactly the stronger anti-theft lock for bicycle of a kind of theftproof that designs at above-mentioned weak point.

The utility model comprises the pin tumbler lock body that is installed in the car front fork cross-drilled hole and is fixed on steel bowl outside the front fork vertical shaft central siphon lower end by staple, its special feature is an affixed locking bar column sleeve on the side of its steel bowl, locking bar and return spring are installed in the locking bar column sleeve, the locking bar lower end have together in order to pin tumbler lock body in the lock core bottom dop annular groove of interlocking mutually, pin tumbler lock body and front fork cross-drilled hole upper wall have a concentric lockhole, one lockhole edge cover is housed in this concentric lockhole, and pin tumbler lock body is to be fixed in the front fork cross-drilled hole by lockhole edge cover, and lockhole edge set upper side then is fixed on the front fork cross-drilled hole outer wall.

The utility model is owing to only need to rotate the front fork certain angle, and press locking bar and insert it into lockhole and promptly just lock, and the lock annular groove of back locking bar lower end and the lock core dop interlocking in the lock body.When not opening lock, locking bar just can not separate with lock body.Therefore, it has simple in structure, and is easy to use, the advantage that theftproof is strong.

Accompanying drawing is a structural representation of the present utility model, also is Figure of abstract.

Below in conjunction with accompanying drawing the utility model is elaborated:

Anti-theft lock for bicycle is made up of steel bowl 1, staple 2, locking bar 3, locking bar column sleeve 4, return spring 5, lockhole edge cover 6, pin tumbler lock body 7, lock core 8.Pin tumbler lock body is installed in the front fork cross-drilled hole, and the steel bowl is fixed on outside the car tripod front fork vertical shaft central siphon lower end by staple.The locking bar column sleeve of its side should be above the front fork cross-drilled hole after affixed locking bar column sleeve on the side of steel bowl, steel bowl were installed onboard.The locking bar column sleeve is installed locking bar and return spring.Before the locking bar column sleeve is fixed in steel bowl side, first separately top and the bottom, to be installed going up behind locking bar and the return spring again two parts are welded together up and down, and then be welded on the steel bowl side.When unlocked, stretch out outside the locking bar column sleeve upper surface because of the return spring effect locking bar upper end; When locking, the locking bar lower end is stretched out and is inserted in the lockhole edge cover.The locking bar lower end have together in order to pin tumbler lock body in the lock core bottom dop annular groove of interlocking mutually, lock body and front fork cross-drilled hole upper wall have a concentric lockhole, a lockhole edge cover also is housed in this concentric lockhole, pin tumbler lock body just is fixed in the front fork cross-drilled hole by lockhole edge cover, and lockhole edge set upper side then is fixed on the front fork cross-drilled hole outer wall.When rotating car front fork certain angle, press locking bar and the locking bar lower end is inserted in the lockhole edge cover during use, the dop of the lock core bottom in locking bar and the pin tumbler lock body is joined.So just fixed front fork, made it can not free rotation by lock.The back unscrews the fastening screw in the Handlebar of bicycle inserted link or transfer to even lock, and locking bar and lock body still link, and front fork still is fixed on the certain angle, still can not free rotation.Therefore, theftproof of the present utility model is stronger.After unblanking, lock core bottom dop is thrown off locking bar lower end annular groove, and locking bar rises under the return spring effect and separates with lock body, and car front fork and front-wheel just can free rotations.In order to prevent to enter foreign material or rainwater in the lockhole, the port lid or the rubber stopple of an activity can be installed at the lockhole mouth place of car front fork cross-drilled hole upper wall.

Claims

Anti-theft lock for bicycle, comprise the pin tumbler lock body that is installed in the car front fork cross-drilled hole and be fixed on steel bowl outside the front fork vertical shaft central siphon lower end by staple, it is characterized in that an affixed locking bar column sleeve on the side of its steel bowl, locking bar and return spring are installed in the locking bar column sleeve, the locking bar lower end have together in order to pin tumbler lock body in the lock core bottom dop annular groove of interlocking mutually, pin tumbler lock body and front fork cross-drilled hole upper wall have a concentric lockhole, one lockhole edge cover is housed in this concentric lockhole, and pin tumbler lock body is to be fixed in the front fork cross-drilled hole by lockhole edge cover, and lockhole edge set upper side then is fixed on the front fork cross-drilled hole outer wall.