| 摘要 |
PURPOSE:To improve a reliability and a durability, and to respond rapidly to the increase/decrease of the numbers of selects and shifts by arranging plural sensors which are constituted with light emitting elements and light receiving elements and detect pieces to be detected with the pieces to be detected within a room. CONSTITUTION:A turning body 3 which turns interlocking and linking with an operation in the select and the shift directions of a change lever is provided freely turnably at a switch case 2, and at the switch case 2, a room 12 which is cut off to an outside is formed, and at the turning body 3, a piece to be detected 6 protruding in a radius direction is provided fixedly, and plural sensors 14 consisting of the light emitting elements and the light receiving elements and which detect the pieces 6 to be detected are arranged with the pieces 6 to be detected at the room 12. Thus, since the sensors 14 detect the pieces 6 to be detected within the switch case 2 where no dust is attached, the reliability and the durability can be improved. Also, even when the numbers of the selects and the shifts are increased or decreased according to the machine style of a speed changer, a rapid response can be obtained only by exchanging a circuit board in which the arranging position and the number of the sensors are changed. |
