CN2271480Y - Bicycle anti-theft device - Google Patents

Abstract

The utility model discloses an anti-theft device for bicycles. A spring lock body 1 of the utility model is fixed on a bicycle frame; a sleeve barrel 4 of a front fork and the wall of a front fork shaft 5 are respectively provided with a locking pin hole 6; a locking pin 7 is matched with a lock core 2 and is inserted into the locking pin hole 6. The utility model has the advantages that a front wheel of a bicycle and the bicycle frame are locked to form definite offset angle to cause the bicycle not to be ridden and pushed; the bicycle frame is damaged when the anti-theft device is damaged; anti-theft performance is good, etc.

Description

Theft-proof device for bicycle

The utility model relates to the anti-joyride device of bicycle.

At present, bicycle is with lock that the trailing wheel pinning is next theft-proof, but lock is pried open easily and had things stolen; Both made the lock that is difficult for prying open, the robber also can mention trailing wheel with front-wheel car is more convenient, pushes away away snugly, then lock is cut and unloads, and bicycle itself does not have a bit damage.Therefore, the theftproof performance of existing bicycle lock is not really desirable.

The purpose of this utility model just provides and a kind of bicycle front-wheel and vehicle body is fixed into certain drift angle, make bicycle do not ridden away or to push away away, when destroying anti-joyride device, will damage cycle frame or stay obvious robber and decrease vestige, the new bicycle anti-joyride device that theftproof performance is good.

The purpose of this utility model is achieved in that by playing lock body, the theft-proof device for bicycle that lock core etc. constitute, its constructional feature are to play lock body and be fixed on the vehicle frame, have lockpin hole on front fork sleeve and the front fork axial wall, lock pin cooperates with lock core, also can insert in the lockpin hole.

Above-mentioned bullet lock body is fixed on by its shell on the slash inside, slash of vehicle frame and has corresponding key hole.

After adopting design as above, lock pin of the present utility model inserts in the lockpin hole on front fork sleeve and the front fork axial wall under lock core drives, and front fork and vehicle frame (vehicle body) is locked into certain drift angle, and bicycle can not be ridden or push away away.Again since lock body be fixed on the vehicle frame, even can whole lock body, lock pin all is fixed in vehicle frame (spider) inside, prize, saw, pound, all very difficult.Both made destroyed by force, cycle frame also will be badly damaged, and car load be scrapped, or stay obvious robber and decrease vestige.So its theftproof performance is significantly better than existing bicycle lock.

Below in conjunction with the drawings and specific embodiments the utility model is done to describe in further detail.

Accompanying drawing is the sectional structure scheme drawing of the utility model embodiment when lock pin withdraws from lockpin hole.

Accompanying drawing illustrates, the concrete composition that the utility model is implemented is: in the theft-proof device for bicycle that is made of bullet lock body 1, lock core 2 etc., play lock body 1 and be fixed on the vehicle frame, have lockpin hole 6 on front fork sleeve 4 and preceding fork shaft 5 walls, lock pin 7 cooperates with lock core 2, also can insert in the lockpin hole 6.

Play the inside that lock body 1 can be fixed on the slash 8 of vehicle frame by its shell 3, have corresponding key hole (9) on the slash 8.Certainly actual implement to be hit by a bullet lock body 1 and shell 3 thereof can also be fixed in front fork inside or all the other outsides, position of vehicle frame, but like this its outward appearance with firm, theftproof performance can be weaker.

The rear portion of above-mentioned lock pin 7 is provided with lock pin and pushes away plate washer 10, the rear portion that this lock pin pushes away plate washer 10 connects spring 11, the front portion of plate washer 10 then pushes away 12 with lock pin and matches, lock pin pushes away 12 and links to each other with lock core 2, lock pin pushes away 12 has the fix shaft 13 of an evagination with the back side of lock core 2 connecting places, and the postmedian of lock pin 7 has chute 14, chute 14 embeds in the fix shafts 13.

Lock pin pushes away 12 and is actually and 2 coaxial linking to each other of lock core the eccentric wheel or the eccentric wheel distressed structure of another axle head embedding chute 14 in the present embodiment.With the resistance of motion of 1 of bullet lock body, also fix shaft 13 can be connected on the shell 3 by mode activities such as attachment pegs when rotating for alleviating lock core 2.

Key hole 9 in the accompanying drawing is out on slash 8 tops, for making things convenient for unlatching and locking, also it can being opened in the slash side, only needs the fixed installation position of 90 ° of rotations such as lock body and shell is got final product.Bullet lock body 1 of the present utility model in addition, lock core 2 are identical with the structure of commercially available spring lock.Can directly purchase and be used as the accessory installation, thereby make easy, with low cost, dependable performance.

The process that makes of present embodiment is: when unblanking, key is inserted in the key hole 9, twisting key drive lock core 2 and coupled lock pin push away 12 and rotate backward, lock pin pushes away 12, and that lock pin is pushed away plate washer 10 is moving to pusher (top), and under the positioning action of chute 14 and fix shaft 13, the front end that makes lock pin 7 withdraws from the lockpin hole 6 on fork shaft 5 and the front fork sleeve 4 in the past backward.Thereby preceding fork shaft 5 recovers freely rotating in front fork sleeve 4, and promptly the front-wheel direction is free to rotate, and bicycle recovers riding condition.When locking on the contrary, then key is oppositely twisted the lock pin that drives lock core 2 and link to each other and push away 12 rotations forward with lock core 2.Lock pin pushes away 12 and loses lock pin is pushed away the pushing away of plate washer 10 and lock pin 7 (top) effect, and lock pin 7 in the lockpin hole 6 before inserting forward on fork shaft 5 and the front fork sleeve 4 (two lockpin holes 6 should align in advance), is extracted key out under the elastic force effect of spring 11 then.Then preceding fork shaft 5 becomes certain drift angle with the stationkeeping of front fork sleeve 4 (being vehicle frame).(this angle implement in preferably front-wheel become about the 30-100 degree with the vehicle body dead ahead.) bicycle can't be ridden or push away away, and can only spin, and the broken ring of desire is fixed in vehicle frame in-to-in anti-joyride device in the original place, then will damage vehicle frame and bicycle be scrapped or stayed obvious robber and decrease vestige, this is that the robber abstains from.Thereby theftproof performance of the present utility model lies prostrate greatly in existing bicycle lock.

Claims (4)

1, a kind of theft-proof device for bicycle, constitute by playing lock body, lock core etc., it is characterized in that: play lock body (1) and be fixed on the vehicle frame, have lockpin hole (6) on front fork sleeve (4) and preceding fork shaft (5) wall, lock pin (7) cooperates with lock core (2), also can insert in the lockpin hole (6).

2, theft-proof device for bicycle according to claim 1 is characterized in that: described bullet lock body (1) is fixed on slash (8) inside of vehicle frame by its shell (3), has corresponding key hole (9) on the slash (8).

3, theft-proof device for bicycle according to claim 1 and 2, the rear portion that it is characterized in that described lock pin (7) is established a lock pin and is pushed away the rear portion that plate washer (10), this lock pin push away plate washer (10) and connect spring (11), and the front portion of plate washer (10) then pushes away (12) and matches with lock pin; Lock pin pushes away (12) and links to each other with lock core (2).

4, theft-proof device for bicycle according to claim 3, it is characterized in that there is the fix shaft (13) of evagination at the back side that described lock pin pushes away (12) and lock core (2) connecting place, the postmedian of lock pin (7) has chute (14), and chute (14) embeds in the fix shaft (13).