Operating mechanism for a bicycle
AssigneeShimano Industrial Company Limited
InventorShozo Shimada
Life of this patent
Estimating the term…
Abstract
An operating mechanism mounted to a bicycle, which is provided with a winding body for winding up thereto a control wire, which is formed separately from a lever rotatably supported to a fixed shaft which is secured onto a bracket member of the bicycle, and also the winding body and the lever are separately pivotally supported to the shaft; a sliding member insertably mounted between the both; and a restraining mechanism mounted between the winding body and the fixed shaft, whereby it is made possible to correct an inaccurate action of an operative demise such as a derailleur, brakes or the like, which action is caused by fluctuation of the stroke of the lever-turning as a result of elongation of the control wire or the like.
Claims10
An operating mechanism for operating, through a control wire, a derailleur fitted to a bicycle, comprising;
- a a bracket member secured onto a frame member of the bicycle;
- b a fixed shaft which is secured to said bracket member,
- c a winding body for winding said control wire thereon, which is rotatably mounted to said fixed shaft, said winding body being provided with a fixing means for fixing a terminal of said wire thereto,
- d a lever which is rotatably mounted onto said fixed shaft,
- e a restraining mechanism mounted between said winding body and said fixed shaft, which serves to restrain the winding body from a further return rotation thereof over a predetermined rotatable range after the same rotates excessively of said range, and
- f a slip coupling insertibly mounted between the root portion of said lever and said winding body, said slip coupling being slidable so as to permit the lever only to be turned when said winding body is restrained from being rotatably restored by said restraining mechanism.
An operating mechanism for operating, through a control wire, a derailleur fitted to a bicycle, comprising;
- a. a bracket member secured onto a frame member of the bicycle,
- b. a fixed shaft which is secured to said bracket member,
- c. a winding body for winding said control wire thereon, which is rotatably mounted to said fixed shaft, said winding body being provided at the outer peripheral surface thereof with a fixing means for fixing a terminal of said control wire thereto and at the inner peripheral surface thereof with a control groove formed in an arciform at an inner portion of the winding body, said groove controlling said winding body to be freely rotated within a range defined by the same,
- d. a lever which is rotatably mounted onto said fixed shaft,
- e a restraining member which is provided at the control groove of said winding body, said member restraining the winding body from an excessively restorable rotation thereof over a predetermined range when the winding body is restored, and
- f a slip coupling insertibly mounted between the root portion of said lever and said winding body, which becomes slidable so as to permit the lever only to be turned when said winding body is restrained from being rotatably restored by said restraining member.
An operating mechanism for operating, through a control wire, a derailleur fitted to a bicycle, comprising;
- a. a bracket member fixed to a frame member of the bicycle,
- b. a fixed shaft secured to said bracket member,
- c. a winding body for winding up said control wire thereto, which is rotatably supported with said fixed shaft, said winding body being provided at the outer periphery thereof with a fixing means for fixing a terminal of said wire thereto, a control groove formed at an inner peripheral surface thereof, and with an axle portion at one end portion extending in the axial direction thereof,
- d. a lever rotatably mounted onto the outer periphery of the axle portion of said winding body,
- e. a restraining member which is provided at the control groove of said winding body, said member restraining the winding body from an excessive restorable rotation thereof over a predetermined range in restoration of the winding body, and
- f. a slip coupling inserted between said winding body and the root portion of said lever, said slip coupling being slidable so as to permit the lever only to be turned when said winding body is restrained from being rotatably restored by said restraining member.
Dependencies are inferred from the claim text.