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front derailleur

A front derailleur and chain guide technology, applied in the field of derailleurs, can solve the problem of space reduction and achieve the effect of reliable space

Active Publication Date: 2018-09-21
SHIMANO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] As the diameter of the rear wheel of a bicycle increases, the space between the base member of the front derailleur and the rear wheel has the potential to decrease

Method used

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Examples

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Embodiment Construction

[0038]

[0039] exist figure 1Among them, the bicycle 10 of the embodiment of the present invention includes: a frame 14 having a seat tube 34 ; a crank axis A1 ; a rear hub axis A2 ; and a front derailleur 12 . The crank axis A1 and the rear hub axis A2 are arranged in parallel. The front derailleur 12 is detachably attached to the seat tube 34 of the body frame 14 . The front derailleur 12 is shifted and operated by an operating device (both not shown) attached to the handlebar of the bicycle 10 via an operating cable 30 . The operation cable 30 has an outer case 30a and an inner cable 30b capable of being inserted into the outer case 30a. The operating cable 30 is a conventionally known wire type cable. The inner cable 30a is slidable within the housing 30b. The operation cable 30 is disposed, for example, inside the down tube 32 of the body frame 14 , is taken out from the inside of the down tube 32 halfway, and is connected to the front derailleur 12 . In addition,...

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PUM

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Abstract

A front derailleur is attachable to a bicycle with a frame in which a fixing bore is provided. The front derailleur basically includes a base member, a chain guide and a link mechanism. The base member has an attaching bore for attaching the base member to a fixing bore of a frame by a fastening member. The chain guide configured to guide a chain. The link mechanism movably couples the chain guide to the base member. The base member is disposed with respect to the chain guide such that at least a part of the attaching bore is disposed in front of the chain guide and above the chain guide while the front derailleur is in a state in which the base member is attached to the frame.

Description

technical field [0001] The present invention relates to a derailleur, and more particularly to a front derailleur mountable to a bicycle having a crank axis. Background technique [0002] In general, the front derailleur has: a base member that can be installed on the frame of the bicycle; a chain guide that guides the chain; Literature 1 and 2). In such a conventional front derailleur, the rear wheel of the bicycle is disposed behind the base member. In recent years, a technique of using a rear wheel with a larger diameter for a bicycle has been proposed in consideration of road performance. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Utility Model Publication No. 57-57194 [0006] Patent Document 2: Japanese Unexamined Patent Application Publication No. 2007-186176. [0007] As the diameter of the rear wheel of a bicycle increases, the space between the base member of the front derailleur and the rear wheel tends to de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62M9/12
CPCB62M9/1342B62M9/135
Inventor 江村笃裕桑山和也井上贤吉
Owner SHIMANO INC