Bicycle shifter

Abstract

The invention discloses a bicycle shifter. The bicycle shifter comprises a base member, a shift up assembly, a pawl member and a ratchet member; the ratchet member is located on the base member and rotates along a first rotating shaft; the shift up assembly can abut against the ratchet member; the ratchet member is surrounded by a detent ratchet group and an intercept ratchet group; the pawl member comprises a connecting part, a detent pawl and an intercept pawl, and the detent pawl and the intercept pawl are fixed to both ends of the connecting part correspondingly; the pawl member slides between a first position and a second position of the base member, when the pawl member is in the first position, the detent pawl is matched with a shift up ratchet, and the intercept pawl is separated from a shift down ratchet; and when the pawl member is in the second position, the intercept pawl is matched with the shift down ratchet, and the detent pawl is separated from the shift up ratchet, a fracture surface is formed between the detent ratchet group and the intercept ratchet group, and the shift up assembly can abut against the fracture surface. Driving members are fewer, the coordinate precision among the members is improved, the position precision of the members is improved, and the anti-gear slipping effect is better.

Description

technical field [0001] The invention relates to a gear shifter, in particular to a bicycle gear shifter. Background technique [0002] An existing bicycle shifter includes a base member, a shift ratchet, a positioning ratchet, a shift ratchet, a positioning ratchet and a release member, and the shift ratchet is rotatably installed relative to the base member; the shift ratchet Both the positioning ratchet and the positioning ratchet are rotatably mounted with respect to the base member around the first pivot axis and the shifting ratchet and the positioning ratchet are fixed on the same shaft member, and the shifting pawl responds to the winding operation of the shifting ratchet with the shifting ratchet. engaging and rotating the ratchet member in the winding direction about the first pivot axis; the positioning pawl is rotatably mounted relative to the base member between a retaining position and a releasing position. When the positioning pawl is at the holding position, ...

AI Technical Summary

Problems solved by technology

[0005] The existing problem of this kind of bicycle gear shifter is that the cooperative movement of the gear-shifting pawl and the positioning pawl relative to the ratchet member realizes the gear-back of the ratchet member and maintains the positioning after gear-backing, while the gear-shifting pawl It is relatively independent from the positioning pawl and there is relative movement; although the shift ratchet and the positioning ratchet are fixed and installed coaxially, there is an installation error between the two, and the shift ratchet still has a swing degree of freedom to drive the ratchet member to perform shifting. In the process of multi-stage transmission of multiple components, the positional accuracy between the gear pawl and the positioning pawl is reduced, and problems such as slipping and jamming are prone to occur

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