Actuation device for a control cable for a bicycle gearshift
First Claim
1. Actuation device for a control cable for a bicycle gearshift, comprising:
- a housing, attachable to a bicycle handlebar,a cable-winding bobbin, angularly mobile in the housing about a main axis of the device,a first driving mechanism, acting on the bobbin to rotate the bobbin in a first angular direction,a second driving mechanism, acting on the bobbin to rotate the bobbin in a second angular direction opposite the first angular direction,an indexer assembly to removably hold the bobbin in predetermined angular positions,wherein said indexer assembly comprises;
a first biased countering member, to counter the rotation of the bobbin in the first angular direction,a second biased countering member, distinct from the first biased countering member, to counter the rotation of the bobbin in the second angular direction, andat least two directly opposed discs that have a substantially identical diameter and are assembled together,wherein one of the at least two opposed discs has a plurality of recesses that are dimensioned to releasably receive a stop member that is limited during the stop member'"'"'s movement to travel within a radially outwardly extending groove that is formed in an other one of the at least two opposed discs that are assembled together,the first biased countering member is arranged in the radially outwardly extending groove and the radially outwardly extending groove limits movement of the first biased countering member, andthe stop member is biased towards said plurality of recesses for direct engagement with a respective one of the plurality of recesses.
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Accused Products
Abstract
The described actuation device comprises a casing, intended for the attachment to the handlebar of the bicycle, a cable-winding bobbin, angularly mobile in the casing about a main axis of the device, a first driving mechanism, acting on the bobbin to rotate it in a first angular direction, a second driving mechanism, acting on the bobbin to rotate it in a second angular direction opposite the first, as well as indexer assembly for removably holding the bobbin in predetermined angular positions. In accordance with the invention, the indexer assembly comprise first countering member, to counter the rotation of the bobbin in the first direction, and second countering member, distinct from the first countering member, to counter the rotation of the bobbin in the second direction. Asymmetric operation is thus obtained which allows active actuation to be set both for upward gearshifting and for downward gearshifting.
103 Citations
31 Claims
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1. Actuation device for a control cable for a bicycle gearshift, comprising:
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a housing, attachable to a bicycle handlebar, a cable-winding bobbin, angularly mobile in the housing about a main axis of the device, a first driving mechanism, acting on the bobbin to rotate the bobbin in a first angular direction, a second driving mechanism, acting on the bobbin to rotate the bobbin in a second angular direction opposite the first angular direction, an indexer assembly to removably hold the bobbin in predetermined angular positions, wherein said indexer assembly comprises; a first biased countering member, to counter the rotation of the bobbin in the first angular direction, a second biased countering member, distinct from the first biased countering member, to counter the rotation of the bobbin in the second angular direction, and at least two directly opposed discs that have a substantially identical diameter and are assembled together, wherein one of the at least two opposed discs has a plurality of recesses that are dimensioned to releasably receive a stop member that is limited during the stop member'"'"'s movement to travel within a radially outwardly extending groove that is formed in an other one of the at least two opposed discs that are assembled together, the first biased countering member is arranged in the radially outwardly extending groove and the radially outwardly extending groove limits movement of the first biased countering member, and the stop member is biased towards said plurality of recesses for direct engagement with a respective one of the plurality of recesses. - View Dependent Claims (2, 3)
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4. A bicycle gearshift actuator comprising:
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a) a housing configured for attachment to a bicycle handlebar; b) a shaft that is carried by the housing; c) a shank having a central opening and opposed flat faces; d) a bobbin that has a central opening mounted adjacent the shank and defines a connection point for a gear shift cable, the bobbin and shank are positioned for rotation about the shaft; e) a first lever operatively connected to the shank and bobbin and rotating the shank and bobbin in a first direction; f) a second lever operatively connected to the shank and bobbin and rotating the shank and bobbin in a second direction; and g) an indexer assembly having a first biased control portion that limits the rotation of the bobbin in the first direction, a second biased control portion that limits the rotation of the bobbin in the second direction, and an indexing disc and a ball-carrying disc that have a substantially identical diameter and are directly opposed to one another, wherein the indexing disc has a plurality of recesses that are dimensioned to releasably receive a stop member that is limited during the stop member'"'"'s movement to travel within a radially outwardly extending groove that is formed in the ball-carrying disc, the first biased control portion is arranged in the radially outwardly extending groove and the radially outwardly extending groove limits movement of the first biased control portion, and the stop member is biased towards said plurality of recesses for direct engagement with a respective one of the plurality of recesses. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification