| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To achieve fine operation feeling based on smooth rotation by increasing positioning accuracy in an axial direction. <P>SOLUTION: A child unit 30 rotates relative to a parent unit 10 around a first axial center AX1 with a grandchild unit 50 in accordance with operation of an operator 56 of the grandchild unit 50. In the child unit 30, an engaged part 40 is arranged at a first end part 31 in a direction which is in parallel with the first axial center AX1, and a bearing hole 53 is formed at a first wall part 19 of the parent unit 10. By the engagement of an engagement part 15 and the engaged part 40, a thick part having an external opposite surface 19a and an internal opposite surface 19b of the engagement part 15 at the first wall part 19 is held between an external regulation part 43 and internal regulation part 45 of the engaged part 40 from both sides, and the positioning of both parent unit 10 and child unit 30 in the axial direction of the first axial center AX1 is performed at one end of each of those units. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
