| 摘要 |
PROBLEM TO BE SOLVED: To provide compact structure of a coupling, and mechanically stable coupling between a coupling receiving part and a piece for coping with the coupling. SOLUTION: A coupling receiving part 2 has a layered pile 4 provided with at least two layers 5a, 5b, 5c, 5d, 5e. A receiving recess 6 is arranged inside the layered pile 4. A partitioning wall in a side of the recess 6 has at least one lead-in part 8a, 8b. A piece for coping with a coupling 3 has at least one guide or lock protrusion 9a, 9b in its side. The guide or lock protrusion 9a, 9b is engaged with an inside of the lead-in part 8a, 8b of the micro-mechanical coupling receiving part 2 in a coupling position. |
