Bicycle frame for concealing derailleur wire

Abstract

A bicycle frame includes two first through holes respectively defined in two opposed points in a periphery of the head tube to communicate with the down tube so as to allow extension of a first derailleur cable for a front derailleur and a second derailleur cable for a rear derailleur. The bottom bracket has a down tube hole for communication with an interior of the down tube, two chain stay holes for communication with each of the two chain stays and two bellow tube holes for extension of two a first bellow tube and a second bellow tube respectively received in the bottom bracket. The derailleur cables extend to the first bellow tubes and the second bellow tubes respectively, which in turn extend out of the bottom bracket and toward the extension holes of the inner tubes for connection to the front and rear derailleurs.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a bicycle frame, and more particularly to a bicycle frame being so configured that a derailleur wire is concealed. [0003] 2. Description of Related Art [0004] A bicycle having a derailleur mounted at the rear of the bicycle normally has at least one derailleur wire extending from the handlebars to the derailleur so that the rider is able to use the derailleur wire to control movement of the derailleur. After the derailleur is moved, the transmission chain is shifted to a different gear such that different output torque is generated if the applied force to the pedal of the bicycle remains the same. Normally the derailleur wire is exposed outside the bicycle frame such that the wire is easily corroded or does harm to the rider. Thus, it is preferable to conceal the derailleur wire inside the bicycle frame. However, none of the bicycle frames available on the market is able to provide s...

AI Technical Summary

Benefits of technology

The solution effectively conceals derailleur wires within the bicycle frame, protecting them from corrosion and ensuring safe operation by maintaining internal routing and secure connections to the derailleurs.

Problems solved by technology

Normally the derailleur wire is exposed outside the bicycle frame such that the wire is easily corroded or does harm to the rider.

However, none of the bicycle frames available on the market is able to provide such a capability.

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