| 摘要 |
PROBLEM TO BE SOLVED: To provide a machine component capable of preventing damage of a core pin in injection molding, a timepiece movement including the machine component, and a timepiece including the timepiece movement.SOLUTION: The machine component is formed by injection molding, in which a columnar recess 30 is provided, one guide recess 40 is provided around the recess 30, a side wall of the guide recess 40 includes a guide wall face 43 facing a center axis O of the recess 30, the guide wall face 43 includes a line segment L parallel to the center axis O of the recess 30, and a length D2 of the line segment L is longer than a depth D1 of the recess 30. |
