DEVICE FOR CHANGING GEAR OF BICYCLE

摘要

PURPOSE:A change gear device of a bicycle is provided to secure the accuracy and the durability of a gear change operation by preventing the transformation of components. CONSTITUTION:A slave gear(300A) of a power intermittent portion(1) is geared with a driving gear(200A) by having an operating groove(2) in the center and supporting on an electric shaft(300) to be rotatable through a bearing(3). The inner side of the operating groove is interlocked with the electric shaft by dividing to an internal tooth portion and an external slide portion. An electric tooth(7) is located in the slide portion by gearing or separating from the tooth portion of the operating groove. Thereby, power is transferred or isolated.