| 摘要 |
<p>PURPOSE:To prevent an output count from being decreased by preventing displacement of a rotary member in the axial direction. CONSTITUTION:Shafts 11, 12 orthogonal to each other are provided to a ball 10 operated through turning contact. An optical rotary encoder 13(14) turned with the shaft 11(12) is inserted respectively to the shaft 11(12). Light emitting elements 18a, 19a, 21a and light receiving elements 18b, 19b, 20b, 21b detecting the rotation of the encoders are provided. Positioning members 30, 31 deciding the axial position of the encoders 13, 14 in the light emitting elements and the light receiving elements are provided to the shafts 11, 12 through turning- contact.</p> |
