CN2248154Y - Antitheft device for bicycle - Google Patents

Abstract

The utility model relates to an antitheft device for a bicycle, belonging to the design field of the light duty vehicle. A rotary disk structure is composed of a lower cover welded with a direction post of a bicycle and an upper cover welded with the middle part of a handlebar, the upper cover is provided with a lock pin and a lock core, a rotary shaft is connected between the upper cover and the lower cover, and the rotary shaft is fixedly connected with the upper cover and can be rotated around a shaft hole of the lower cover; the lower cover is provided with a lock pin inserting hole, and the lock pin of the upper cover can be inserted into the lock pin inserting hole from different positions; the handlebar is rotated and placed in an approximately vertical state and is locked, the bicycle can not be pushed, and thereby, the antitheft purpose can be achieved. The utility model has the advantages that the strength is big, even if the antitheft is broken, a thief can not leave with a bicycle, and the utility model provides the reliable antitheft guarantee for the bicycle.

Description

Theft-proof device for bicycle

Theft-proof device for bicycle belongs to light-duty vehicle designs field, and it is the anti-joyride device that can make handlebar commutation and locking by.

The anti-theft measure of taking for bicycle mainly is the mode that locks beyond vehicle body at present, though the lock that is increased is of a great variety, but all have following shortcoming: 1, since lock with the ratio between vehicle body restriction, the lock volume can not do too greatly, therefore limited the intensity of lock.Means such as the car stealer adopts sledge, pounds, cuts, saw all can be destroyed lock.2, the bicycle that will lock after destroying can normally be ridden, and helps the car stealer to take car rapidly and leaves the crime scene.3, the bicycle that can normally ride can resell or the car stealer personal, exist as a social security problem so bicycle is stolen always.The outer at present anti-theft measure that locks still can not provide failure-free antitheft guarantee for bicycle.

The purpose of this utility model is to provide a kind of theft-proof device for bicycle, and its major part itself is exactly the major part of bicycle, so possess with the approximate intensity of vehicle body.If destroyed anti-joyride device, just equal to have destroyed bicycle, make bicycle lose the function of normally riding.Even car is moved away from the crime scene, also needing to change major part could use, for the car stealer resells or the personal obstacle that is provided with.

In order to achieve the above object, solution of the present utility model provides a kind of anti-joyride device that makes the ordinary bicycle handlebar can rotate commutation and can pin with key, when parking bicycle, handlebar can be placed with the near normal state and is pinned with key, make it to lose the function of steering, stumble mutually with the vehicle frame part in the handlebar lower end simultaneously, the amplitude of oscillation of front-wheel is limited in the very little scope, makes bicycle carry out, thereby reach theft-proof purpose.

The utility model is a turntable structure, by lower cover with can form around the loam cake that the lower cover axis hole rotates, on be covered with lock pin and lock core, the rotating shaft that one of connection can be affixed with loam cake between loam cake and the lower cover, the upper and lower displacement of the restricted rotating shaft of the upper surface of lower cover and by screw and the affixed compressing tablet of lower cover, compressing tablet surface and lower cover are respectively equipped with the lock pin jack that can insert lock pin from diverse location.

The loam cake upper surface middle part has a strip groove, groove is communicated with the axis hole that the loam cake lower surface is offered, the upper surface of rotating shaft Cylinder has fixing threaded hole, press strip in this screw and the groove is fixed by screw, rotating shaft is made up of the garden dish and the Cylinder that are connected as a single entity, the garden dish diameter of rotating shaft bottom is greater than the Cylinder diameter on its top, and the garden dish of rotating shaft inserts the axis hole of lower cover upper surface, and compressing tablet is positioned at the upper surface of the garden dish of axle.

Below in conjunction with accompanying drawing the utility model is explained in detail.

Fig. 1 is the utility model schematic appearance.

Fig. 2 is an axis profile scheme drawing of the present utility model.

Fig. 3 decomposes the assembling scheme drawing for the utility model.

As shown in the figure, basis is practical is made up of loam cake (1) that is welded on the handlebar middle part and the lower cover (2) that is welded on the bicycle directional post.

Be provided with shape of a hoof lock pin (3) in the loam cake (1), open the lock core (4) and the kayser pin pellet shot from a slingshot (5) of lock pin (3), the lower surface of loam cake (1) has an axis hole (6), loam cake (1) lower surface has two jack (7), (8) of running through the lock pin (3) of lid along the other symmetry of axis hole, and the upper surface of loam cake has strip shape groove (9) and can embed the press strip (11) of fixed rotating shaft in the groove (10).

Loam cake and lower cover be connected one can be affixed with loam cake rotating shaft (10), lower cover (2) is made up of the compressing tablet parts such as (12) of restriction rotating shaft (10), the upper surface of lower cover has the axis hole (13) of placing rotating shaft (10), lock pin inserts jack (14), (15), (16), (17), the fixing reservation screw hole (18) of compressing tablet (12), compressing tablet (12) center has the hole, garden (19) of stretching out for rotating shaft (10) Cylinder, hole, garden (19) distribute on every side have (20) four in hole, garden that lock pin (3) passes and fixedly the screw of compressing tablet (12) by (21) six in hole, the lock pin of lower cover lower surface inserts jack (14), (15), (16), spring marble is housed (17), can plays when opening and to insert the effect that the lock pin termination ejects jack.

During installation spring marble is embedded jack (14), (15), (16), (17) respectively, rotating shaft (10) is embedded in the axis hole (13), compressing tablet (12) is built, fix with screw.Again the axis hole (6) of loam cake (1) lower surface is inserted in the garden post part of rotating shaft (100), it is fixing with press strip and rotating shaft (10) with screw to embed bar shaped rotating shaft press strip (11) in the strip groove (9) of loam cake (1) upper surface, loam cake (1) and lower cover (2) promptly link together by rotating shaft, and loam cake can freely rotate.

During the lock car, with key rotation lock core (4), the lock pin that shape of a hoof lock pin promptly ejects lower cover (2) inserts jack (14), (16), handlebar can be pressed vertical rotation 67.5 degree of anticlockwise direction this moment, lock pin (3) has promptly been aimed at lock pin and has been inserted jack (15), (17) shape of a hoof lock pin (3) is depressed, the locking handlebar, the handlebar of this moment has been lost the function of steering, stumble mutually with vehicle frame in the lower end of handlebar simultaneously, and the amplitude of fluctuation of front-wheel is restricted, and therefore can't carry out, if damage this device by force, also just damage handlebar, made bicycle ride or to carry out, thereby played theft-proof effect.

With key rotation lock core (4), the lock pin that shape of a hoof lock pin promptly ejects lower cover (2) automatically inserts jack (15), (17) when unblanking, and handlebar vertically can be turned round in the direction of the clock 67.5 degree this moment.The lock pin that lock pin has promptly been aimed at the lower cover upper surface inserts jack (14), (16), lock pin (3) is depressed again, and handlebar by the horizontality locking, can normally be ridden again.

The utility model is simple in structure, and intensity is big, and both just the car stealer had damaged the major part that also need change bicycle after anti-joyride device is stolen car and could use, and gives the car stealer or sell dirty personally to be provided with obstacle, so that it is hung back.

The utility model also has the time of parking space-efficient effect.

The utility model is simple in structure, and the antitheft mode of bicycle has been done very big innovation, is a kind of theft-proof device for bicycle.

Claims (3)

1, theft-proof device for bicycle, it is characterized in that being turntable structure, by lower cover with can form around the loam cake that the lower cover axis hole rotates, on be covered with lock pin and lock core, the rotating shaft that one of connection can be affixed with loam cake between loam cake and the lower cover, upper and lower displacement of the restricted rotating shaft of the upper surface of lower cover and the compressing tablet of pressing admittedly by screw and lower cover, compressing tablet surface and lower cover upper surface are respectively equipped with the lock pin jack that can insert lock pin from diverse location.

2, theft-proof device for bicycle as claimed in claim 1, it is characterized in that the loam cake upper surface middle part has a strip groove, groove is communicated with the axis hole that the loam cake lower surface is offered, and the upper surface of rotating shaft has fixing threaded hole, and the press strip in this screw and the groove is fixed by screw.

3, theft-proof device for bicycle as claimed in claim 1 or 2, it is characterized in that rotating shaft is coiled by the garden that is connected as a single entity and Cylinder is formed, the garden dish diameter of rotating shaft bottom is greater than the Cylinder diameter on its top, and the garden dish of rotating shaft inserts the axis hole of lower cover upper surface, and compressing tablet is positioned at the upper surface of rotating shaft garden dish.

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