CN2041342U - Anti-thieving device for bicycle - Google Patents

Abstract

The utility model provides an anti burglary device for bicycle and is characterized in that the utility model is arranged at the front part of the bicycle through a fixing element and uses at least two lines of cylinders and Z-shaped keyholes, and a bolt of the utility model is hidden in the utility model. Compared with the existing bicycle, the utility model can prevent the burglar using the stumbling rope of the clothes hanger, the universal key or the spanner from stealing the bicycle effectively, and has the advantage of low cost.

Description

Anti-thieving device for bicycle

The utility model belongs to the transportation technology field, is the device about a kind of bicycle that avoids theft.

Present bicycle maker's pliers type lock, owing to be contained in the back vent department of bicycle, it has only row's pellet shot from a slingshot, locking bolt exposes long, lock core is outstanding, thereby car stealer's rope of then taking to stumble hangs clothes hanger, extrudes pellet shot from a slingshot with master key, pull out locking bolt with the reinforcing bar spanner, or steal bicycle with comparalive ease with multiple modes such as the broken tapered ends of socket wrench.

The purpose of this utility model is a kind of novel theft-proof device for bicycle of development, prevents that the car stealer from taking to hang mode such as clothes hanger with the rope of stumbling and stealing bicycle, overcomes the above-mentioned shortcoming of existing bicycle lock existence.The technical scheme that the utility model is taked is:＜1 〉. anti-theft device is contained in the front portion of bicycle, threeway place is descended before being fixed on bicycle by retainer ring and holddown groove in its upper body, its lower body is fixed on the bicycle front fork place by retainer ring and fixing hole, and last lower body is placed restrictions on bicycle directional after closing by the device bolt-lock;＜2 〉. adopt two above pellet shot from a slingshot of row and Z type keyholes;＜3 〉. the device bolt is hidden in casting in the lower device body.Owing to take abovementioned technology, bicycle preferably can avoid theft.Further describe the concrete shape and structure feature of utility model in conjunction with example and accompanying drawing.Fig. 1 represents the front view of this theft-proof device for bicycle; Fig. 2 represents the vertical view of this theft-proof device for bicycle; Fig. 3 represents this theft-proof device for bicycle upper body B-B partial sectional view.

With reference to Fig. 1, Fig. 2, this theft-proof device for bicycle divide upper body 1 and lower body 6 two parts.With reference to Fig. 1, Fig. 2, Fig. 3, upper body 1 has rotor 11, rotor alignment pin 2, the device bolt 5, two that is straight type is arranged above pellet shot from a slingshot 3, spring 4, upper body retainer ring 7 is carved with the holddown groove 9 that is triangular shape on the upper body retainer ring 7, Z-shaped keyhole 13.With reference to Fig. 1, Fig. 2, lower body 6 has lower body retainer ring 8, lower body fixing hole 10 and keyhole 12.

During installation, upper body retainer ring 7 is sleeved on before the bicycle steel bowl top of threeway down, the triangular shape holddown groove 9 corresponding weld marks of threeways down; Lower body retainer ring 8 is overlapped under the shelves that are pressed on bicycle front fork, and lower body fixing hole 10 is fastened on the mud watt fixture of preceding fork.

During the device locking, adjust the handlebar direction earlier, make the keyhole 12 on the device bolt 5 corresponding lower bodies on the upper body, use key to clockwise direction turn rotor 11 then, an end of device bolt 5 puts in the keyhole 12 of lower body, and it is just sealed to go up lower body like this.During unlatching, to counter clockwise direction turn rotor 11, device bolt 5 is return the upper body from lower body keyhole 12 with key, goes up lower body like this and just separates.

The phase-locked ratio of this bicycle anti-theft device and existing bicycle has obvious advantage and anti-theft effect. This device is owing to be installed on the front lower threeway of bicycle and the front fork, thereby can limit bicycle after sealed and sail direction, and car can only be turned at certain among a small circle interior circuit, can prevent that car stealer's rope of stumbling from hanging clothes hanger and steal car; Because this device adopts the two above pellet of row and Z-type keys The hole, thereby can prevent the unlatching of skeleton key pressure pellet; Because it is hidden that the device bolt shortens, thereby can prevent that steel bar wrench from extracting rear unlatching with bolt; Because the device body is foundry goods, thereby can prevent with the broken lock of instrument. In a word, this device can prevent from adopting various ways theft bicycle effectively, and has the low advantage of cost.

Claims (1)

1, a kind of theft-proof device for bicycle, mainly contain compositions such as device body, device bolt, pellet shot from a slingshot, spring, rotor, keyhole, it is characterized in that the device body is divided into upper body and lower body: there are two above pellet shot from a slingshot of row and Z type keyholes the upper body, the retainer ring that can be sleeved on the preceding threeway steel bowl down of bicycle is arranged, have on the retainer ring and can weld the corresponding holddown groove of trace with threeway; The device lower body has the retainer ring that can be sleeved under the bicycle front fork shelves, and the fixing hole on the mud watt fixture that can be fastened on preceding fork is arranged; The device bolt is straight type, and the length of device bolt is with all hidden in fluid origin device body when last lower body is sealed.