Patent ID: 6810764
Filing Date: 2004-11-02
Classification: B62M,Y10T

Abstract:
A bicycle speed change control device installed in a bicycle and adapted to drive a cable to further control the gearshift position of a derailleur of the bicycle, the bicycle speed change control device comprising:a housing connectable to a handlebar of the bicycle said housing comprising a first coupling portion and a second coupling portion; a cable control set fastened pivotally with the first coupling portion of said housing and reversibly supported on the first coupling portion of said housing by spring means thereof and adapted to drive the cable to control the gearshift position of the derailleur of the bicycle, said cable control set comprising a first toothed engagement portion, a second toothed engagement portion, and a third toothed engagement portion; a first lever, said first lever comprising a lever body fastened pivotally with the first coupling portion of said housing and reversibly supported on the first coupling portion of said housing by spring means thereof, the lever body of said first lever having a free end terminating in a finger press portion, and a push member provided at one end of the lever body of said first lever remove from the finger press portion of the lever body of said first lever, said push member being forced into engagement with said third toothed engagement portion of said cable control set and to further turn said cable control set when said first lever is turned in one direction, said push member being disengaged from said third toothed engagement portion of said cable control set when said first lever reversed to a predetermined position; and a second lever, said second levers comprising a lever body fastened pivotally with the second coupling portion of said housing and reversibly supported on the second coupling portion of said housing by spring means thereof, the lever body of said second lever having a fixed end pivoted to the second coupling portion of said housing, a free end terminating in a finger press portion, and a tooth disposed adjacent to the fixed end and adapted to engage the first toothed engagement portion and second toothed engagement portion of said cable control set selectively, the tooth of said second lever being moved with said second lever over teeth of said first toothed engagement portion stepwise when said first lever turned to rotate said cable control set forwards, the tooth of said second lever being moved with said second lever into engagement with said first toothed engagement portion and said second toothed engagement portion of said cable control set alternatively for enabling said cable control set to be returned when said second lever alternatively pressed and released.