| 摘要 |
A device for shifting bicycle gears. The device includes a housing part and a rotary element. The housing part has a circumferential surface and a plurality of notches formed in the circumferential surface. Each of the plurality of notches corresponds to a gear-shifting position. The rotary element has a circumferential wall and is selectively rotatable relative to the housing part, the housing part being disposed concentrically within the circumferential wall of the rotary element. The device further includes a detent spring configured as a wrap spring and arranged circumferentially around the housing part, the wrap spring having a wrap diameter and a wrap angle of between approximately 180 DEG and 360 DEG .
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