| 摘要 |
<p>PURPOSE: To reduce a size and weight and to improve reliability by providing the device with plural link members to be cooperatively displaced by the displacement of a guide pin so that the changeover of four modes is made possible by one link mechanism. CONSTITUTION: A function cam 20 is freely rotatably supported at a base plate 2. A tooth part 20a is formed on the outer periphery of the function cam 20. The function cam 20 rotates by receiving the driving power of a motor from the tooth part 20a. Plural lines of reflection surfaces and non-reflection surfaces for detecting rotational positions are formed on the rear surface of the function cam 20. Plural optical sensors are arranged on the base plate 2 in the opposite positions thereof. The detection of the rotational position of the function cam 20 is made possible by the outputs of these plural optical sensors.</p> |
