| 摘要 |
PROBLEM TO BE SOLVED: To reduce the possibility that foreign matter in a mission case is drawn to a slide interface between a piston member and a cylinder chamber.SOLUTION: A transmission includes a piston member 101 inserted into a lateral cylinder chamber 100 and supported in a slidable manner. Of an insertion place of the piston member 101 to the cylinder 100, at a place that is at a position drawn into the cylinder chamber 100 in a most retreat-in position and is equivalent to a position exposed to the outside of the cylinder chamber 100 in the most retreat-in position, a recess part 101c opened upwardly is formed so as to form a space between itself and a downward surface of the cylinder chamber 100.SELECTED DRAWING: Figure 10 |
