| 摘要 |
PURPOSE: A double-sides gear is provided to enhance the driving force of parts for a variety of products and toys since a group of tooth patterns are formed on both sides of one body. CONSTITUTION: A double-sides gear comprises a body and a fixing shaft. The fixing shaft is installed on the center of the body. A cable moves back and force according to the operation of a transmission lever and a transmission unit operates. A connecting rod moves back and forth according to the operation of the transmission unit and a spline(13a), which is installed on a driving shaft(8), moves back and forth as a bearing(14a), which is connected to the connecting rod, moves back and forth. Since one pinion gear(15a) moves back and forth and selectively moves to the inner-, outer- or other-tooth pattern of a pedal gear(7), the rotation of the pedal gear can be varied and thus transmission is possible. |
