CN2283603Y - Anti-stolen device for bicycle - Google Patents

Abstract

The utility model discloses a theftproof device for a bicycle. A built-in lock with a lock tongue is encapsulated in a horizontal pipe or an oblique pipe of a triangular frame of the bicycle. On one hand, a keyhole of the built-in lock can be exposed from a small hole which is arranged on the column surface of the horizontal pipe or the oblique pipe of the triangular frame. On the other hand, when the lock tongue of the built-in lock is locked, the lock tongue can pass through strip-shaped grooves which are arranged on a front fork shaft and the rear column surface of a handle shaft at the same time. When the lock tongue is unlocked, the lock tongue can be completely withdrew form the two strip-shaped groove holes. The theftproof device has the advantages of high theftproof performance and high safety. Under the no-key condition, the built-in lock can not be destroyed by using a prying means, a cutting means, a drilling means, a sawing means, etc. by anybody. The device is really a renewal product of a bicycle lock.

Description

Theft-proof device for bicycle

The utility model relates to the anti-theft built-in lock that uses on a kind of bicycle.

Bicycle lock on the market is of a great variety now, and version is various.When these locks were installed on the bicycle, whole lock all was exposed in broad daylight.Therefore no matter the structure of these locks how, stealer adopts means such as prize, saw, bore, cut to destroy by lock, makes lock lose the function of guarding bicycle, allows stealer that bicycle is ridden away.Also newly occurred a kind of spiral anti-theft lock for bicycle (ZL92236044.8) on the current market, to be concealed installation among the standpipe, make the handgrip of bicycle not rotate before the front fork tube of bicycle and spider during locking with this lock.Though means such as this lock can not adopt sled, cut are destroyed it, still its lock core can be destroyed with the means of boring.Because the lock core of this lock is again the dead bolt of this lock, therefore as long as lock core is destroyed, dead bolt is also simultaneously destroyed, so the handgrip of bicycle also just can not pin.Therefore this lock can not be antitheft fully.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art, and provides a kind of safety extremely strong, and conservative factor is very high, and is very easy to use, especially destroyed the theft-proof device for bicycle that lock can not be opened at lock core.

The purpose of this utility model realizes by following technical measures: this anti-joyride device is made up of the built-in lock that has dead bolt, cushion block and bicycle body.At first on the cylinder of the transverse tube of bicycle tripod or inclined tube, have aperture.Simultaneously on the back cylinder of the preceding fork shaft of bicycle and handgrip axle, respectively have a bar shape trench hole in correspondence with each other.By cushion block whole built-in lock is encapsulated in front portion in the bicycle tripod transverse tube or the top in the inclined tube then, and allows the key hole of built-in lock reveal from the transverse tube of spider or the aperture on the inclined tube cylinder.But also the bar shape trench hole on the cylinder behind fork shaft and the handgrip axle before dead bolt can be passed simultaneously when locking, when opening in the past behind fork shaft and the handgrip axle bar shape trench hole of cylinder withdraw fully.

Accompanying drawing is a structural representation of the present utility model.

The utility model is described in further detail below in conjunction with embodiment: this theft-proof device for bicycle mainly is made up of bicycle body (1), the built-in lock (5) that has dead bolt and cushion block (6).Earlier open a hole, the transverse tube endoporus of it and spider (4) is connected at the preceding cylinder of bicycle tripod (4) front standpipe.Meanwhile also on the cylinder of spider (4) transverse tube, open an aperture, on the back cylinder of preceding fork shaft (2) and handgrip axle (3), respectively open a bar shape trench hole in correspondence with each other.After then preceding fork shaft (2) and handgrip axle (3) being unloaded, the hole that allows the built-in lock (5) that has dead bolt be opened from the front standpipe of spider (4) is passed, and enters in the transverse tube of spider (4).The built-in lock (5) of using cushion block (6) will have dead bolt again is fixedly mounted in the transverse tube, and the key hole of built-in lock (5) is revealed from the aperture on the transverse tube cylinder of spider (4).Also to make dead bolt when locking, can penetrate into the bar shape trench hole on the cylinder of preceding fork shaft (2) and handgrip axle (3) back simultaneously; When opening, can withdraw fully from these two bar shape trench holes.After built-in lock (5) installs, the preceding fork shaft (2) that will unload down again and the reduction of handgrip axle (3) dress.Use the nameplate of bicycle that hole on the standpipe of car body spider (4) front is covered at last.

In the use when parking bicycle, allow the natural deflection of front-wheel and handgrip left, before screw key protrudes into dead bolt simultaneously then behind fork shaft and the handgrip axle in the bar shape trench hole on the cylinder, then extract key, so the preceding fork shaft of bicycle and in axle is just blocked by dead bolt, handgrip can not rotate the insurance safe condition that bicycle is in can not ride and can not push away away.When owner will use car,, dead bolt is withdrawn behind fork shaft and the handgrip axle in the past fully in the bar shape trench hole on the cylinder as long as key is inserted screw key behind the key hole.The handgrip axle returns to state nimbly and freely again like this, and bicycle just can be ridden away.

The utility model has following advantage compared to existing technology: this anti-theft device has adopted sealed built-in lock Structure, lock combines together. Do not having in the situation of key, and though anyone with prize, saw, cut, brill etc. Means all can not be opened lock. Its theftproof performance is good, and high safety is a kind of renewal of existing bicycle lock Regeneration product.

Claims (1)

1, a kind of theft-proof device for bicycle of forming by the built-in lock that has dead bolt (5), cushion block (6) and bicycle body (1), it is characterized in that having aperture on the cylinder of the transverse tube of bicycle tripod (4) or inclined tube, on the back cylinder of the preceding fork shaft (2) of bicycle and handgrip axle (3), have bar shape trench hole; Cushion block (6) is encapsulated in the built-in lock that has dead bolt (5) on the interior front portion or the interior top of inclined tube of transverse tube of bicycle tripod (4), the key hole of built-in lock (5) can reveal from the transverse tube of spider (4) or the aperture on the inclined tube cylinder, the dead bolt of built-in lock (5) can pass the bar shape trench hole on preceding fork shaft (2) and handgrip axle (3) the back cylinder simultaneously when locking, withdraw in the bar shape trench hole when opening on energy the past fork shaft (2) and handgrip axle (3) the back cylinder.

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