SYNCHRONOUS BRAKING DEVICE FOR FRONT AND REAR WHEELS OF BICYCLES

Abstract

A synchronous braking device for front and rear wheels of bicycles is revealed. A left brake cable and a right brake cable which are operated by a left brake lever and a right brake lever respectively are connected to a synchronous driving integration mechanism. No matter users squeeze the left brake lever, the right brake lever, or both the left and the right brake levers at the same time, a front brake cable and a rear brake cable are driven synchronously. Thereby a brake installed on a front wheel and a brake set on a rear wheel are further driven to brake at the same time. Thereby the rider's safety during riding is ensured.

Claims

1. A synchronous braking device for front and rear wheels of bicycles comprising two brake levers, a left brake cable, a right brake cable, a synchronous driving integration mechanism, a front brake cable, and a rear brake cable; wherein each of the left brake cable and the right brake cable includes a first joining end and a second joining end which are arranged opposite to each other and connected to one of the brake levers correspondingly and the synchronous driving integration mechanism respectively; wherein each of the front brake cable and the rear brake cable is composed of a first connection end and a second connection end disposed opposite to each other; the first connection end of the front brake cable and the first connection end of the rear brake cable are connected to a brake installed on a front wheel and a brake arranged at a rear wheel respectively while the second connection ends of the front and the rear brake cables are connected to the synchronous driving integration mechanism; wherein at least one of the brake levers is operated to make the left brake cable or/and the right brake cable pull the front brake cable and the rear brake cable synchronously through the synchronous driving integration mechanism; the front brake cable and the rear brake cable further drive the brake installed on the front wheel and the brake arranged at the rear wheel respectively to act on and brake the front and the rear wheels at the same time.

2. The device as claimed in claim 1, wherein the front brake cable and the left brake cable are the same cable; the rear brake cable and the right brake cable are the same cable.

3. The device as claimed in claim 1, wherein the synchronous driving integration mechanism includes a fastener and a disc body which is provided with two discs arranged coaxially and a gap formed between the two discs; the fastener is fixed between the two discs and across the gap; the left brake cable and the right brake cable are mounted in the gap, wound around an axis of the disc body in a first direction, and connected and fixed to the fastener by the second joining ends; the front brake cable and the rear brake cable are mounted in the gap, wound around the axis of the disc body in a second direction opposite to the first direction, and connected and fixed to the fastener by the second connection ends.

4. The device as claimed in claim 3, wherein the front brake cable and the left brake cable are the same cable; the rear brake cable and the right brake cable are the same cable.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:

[0017] FIG. 1 is a schematic drawing showing structure of an embodiment of a synchronous braking device for front and rear wheels of bicycles according to the present invention;

[0018] FIG. 2 is an exploded view of an embodiment of a synchronous braking device for front and rear wheels of bicycles according to the present invention;

[0019] FIG. 3 is a fully assembled view of an embodiment of a synchronous braking device for front and rear wheels of bicycles according to the present invention;

[0020] FIG. 4 is a perspective view of an embodiment of a synchronous braking device for front and rear wheels of bicycles according to the present invention;

[0021] FIG. 5 is a schematic drawing showing an embodiment mounted to a bicycle according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0022] In order to learn technical content, features and functions of the present invention more completely and clearly, please refer to the following detailed description with reference to the accompanying figures and reference signs.

[0023] Refer to FIG. 1, a synchronous braking device for front and rear wheels of bicycles according to the present invention includes two brake levers 1 (a left one and a right one), a left brake cable 2, a right brake cable 3, a synchronous driving integration mechanism 4, a front brake cable 5, and a rear brake cable 6.

[0024] Each of the left brake cable 2 and the right brake cable 3 includes a first joining end 21, 31 and a second joining end 22, 32 which are arranged opposite to each other and connected to the one of the brake levers 1 correspondingly and the synchronous driving integration mechanism 4 respectively.

[0025] As to the front brake cable 5 and the rear brake cable 6, each of them is composed of a first connection end 51, 61 and a second connection end 52, 62 disposed opposite to each other. The first connection end 51 of the front brake cable 5 and the first connection end 61 of the rear brake cable 6 are connected to a brake 7 disposed on a front wheel and a brake 7 arranged at a rear wheel respectively while both of the second connection ends 52, 62 are connected to the synchronous driving integration mechanism 4.

[0026] While at least one of the brake levers 1 is operated, the left brake cable 2 or/and the right brake cable 3 is/are activated to drive the front brake cable 5 and the rear brake cable 6 synchronously through the synchronous driving integration mechanism 4. Then the front brake cable 5 and the rear brake cable 6 further drive the brake 7 arranged at the front wheel and the brake 7 disposed on the rear wheel respectively to act at the same time.

[0027] Refer to FIG. 2-5, the synchronous driving integration mechanism 4 consists of a fastener 43 and a disc body 44 which is provided with two discs 441 disposed coaxially and a gap 442 formed between the two discs 441. The fastener 43 is fixed between the two discs 441 and across the gap 442. As shown in FIG. 2 and FIG. 3, the left brake cable 2 and the right brake cable 3 are mounted in the gap 442, wound around an axis of the disc body 44 in a first direction, and connected and fixed to the fastener 43 by the second joining ends 22, 32. The front brake cable 5 and the rear brake cable 6 are mounted in the gap 442, wound around the axis of the disc body 44 in a second direction opposite to the first direction, and connected and fixed to the fastener 43 by the second connection ends 52, 62. In a preferred embodiment, the front brake cable 5 is an extension of the left brake cable 2 and the rear brake cable 6 is an extension of the right brake cable 3. That means not only the front brake cable 5 and the left brake cable 2 are the same cable, the rear brake cable 6 and the right brake cable 3 are also the same cable.

[0028] While squeezing the left or/and the right brake lever 1, the left brake cable 2 or/and the right brake cable 3 are also driven to move. Owing to that the second joining ends 22, 32 of the left and the right cables 2, 3 are connected and fixed to the fastener 43 which is fixed between the two discs 441, the left brake cable 2 or/and the right brake cable 3 being driven makes/make the disc body 44 to rotate through the fastener 43. Both the front brake cable 5 and the rear brake cable 6 are wound around the disc body 44 so that the rotation of the disc body 44 drives the front brake cable 5 and the rear brake cable 6 to be pulled at the same time and moved a brake stroke. Thus the brake 7 installed on the front wheel and the brake 7 arranged at the rear wheel are further driven to act on the front wheel and the rear wheel respectively for braking at the same time.

[0029] Additional advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details, and representative devices shown and described herein. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalent.