CN2147316Y - Build-in bicycle theft-proof lock - Google Patents

Abstract

The utility model relates to a built-in theft-proof lock for bicycles, belonging to the design and manufacture technology for the bicycle locks. The existing bicycle locks are damaged easily. A lock body and a lock core are arranged inside a shaft tube of a bicycle front fork of the product. The lock core is caused to move outward by a key. A ball of the lock body is lifted inside a corresponding ball hole of a lock core ball under an action of a spring. The lock core is locked and is unable to move forward and backward. One end of the lock core passes through the tube wall of the shaft tube of the front fork and the tube wall of the shaft tube of a tripod at the time. The front fork is caused to be unable to rotate by the lock core. The built-in theft-proof lock for bicycles is fearless of breakages such as sawing, cutting, disassembling, smashing, unclenching, etc. The built-in theft-proof lock for bicycles has the advantages of good theft-proof effect, small size, and low cost.

Description

Build-in bicycle theft-proof lock

The utility model belongs to the design and manufacturing technology field of for bicycle theftproof lock.

Existing anti-theft lock for bicycle is mounted in outside the vehicle body, and easy stolen person destroys and is unfavorable for antitheft.

The purpose of this utility model provides a kind of latent theftproof lock of keeping away in frame.

Structure of the present utility model is as follows: be provided with a lock body in the front fork central siphon in the bicycle tripod central siphon, there is the lock core hole of an one end lateral direction penetrating front fork central siphon tube wall and tripod central siphon wall at the lock body middle part, being equipped with one in the lock core hole can be along the axially movable core of lock core hole, the core pellet shot from a slingshot is housed in the core, and lock body is provided with corresponding lock spring.

When need are locked, key is inserted core, with key core is moved outward.When each pellet shot from a slingshot position of core was relative with the corresponding pellet shot from a slingshot of lock body position, lock spring rose up under the effect of spring in the shell hole of corresponding core pellet shot from a slingshot, and core is promptly by locked and can't move forward and backward.This moment, one end of core passed front fork central siphon tube wall and tripod central siphon tube wall because of moving outward, and core can't rotate front fork, and bicycle just can't be ridden away or be pushed away away.Opening core makes it be retracted into the interior process of lock body fully with above-mentioned just opposite.The key bit portion that promptly inserts core makes lock spring withdraw from the pellet shot from a slingshot hole of core pellet shot from a slingshot, and core just can be retracted in the lock body, and front fork can rotate flexibly.

Compared with prior art, the utility model has the advantages that: keep away owing to lock is latent in frame, be not afraid of saw, cut, tear open, pound, prize, destruction such as brill, good anti-theft effect, this outer volume is little, cost is low.

Fig. 1 and 2 is the sectional structure schematic diagram of embodiment, and wherein Fig. 1 is for to analyse and observe for the A-A of Fig. 2 again.

Embodiment: see Fig. 1-2.The profile position of Fig. 1 does not cut open the keyhole on the core.Lock body 2 is a threaded engagement with the left end of core 3.Pellet shot from a slingshot on core and the lock body is three.1 is hundle-bar pipe close screw rod among the figure, and 4 is the tripod central siphon, and 5 is the front fork central siphon, and 6 is the core dog screw, and 7 is the hundle-bar central siphon.After key inserted core, core can move forward and backward along screw thread rotation, is illustrated as locking state.

Claims (2)

1, a kind of build-in type anti-theft lock for bicycle, it is characterized in that: be provided with a lock body in the front fork central siphon in the bicycle tripod central siphon, there is the lock core hole of an one end lateral direction penetrating front fork central siphon tube wall and tripod central siphon wall at the lock body middle part, being equipped with one in the lock core hole can be along the axially movable core of lock core hole, the core pellet shot from a slingshot is housed in the core, and lock body is provided with corresponding lock spring.

2, lock as claimed in claim 1 is characterized in that being that the lock body (2) and the left end of core (3) are threaded engagement.

Images