| 摘要 |
An object of the present invention is to prevent the deformation of tabs. At least three or more entrance restricting portions 30, 31 and 32 arranged in a width direction at each of substantially opposite sides of a plurality of tabs 20, 21 in a height direction project in a receptacle 10. A plurality of drop-in spaces 3A to 3E are successively formed in the width direction, each being formed at an inner side of a plurality of entrance restricting portions 30, 31 and 32 adjacently arranged at the substantially opposite sides of the tabs 20, 21. When a spherical surface of a spherical body 201 inserted into the receptacle 10 from front comes into contact with the front ends of a plurality of entrance restricting portions 30, 31 and 32 and a top 202 on a central axis of the spherical body 201 is inserted into the drop-in spaces 3A to 3E, the tabs 20, 21 are arranged at positions different from the top 202 in a planar view in any of the plurality of drop-in spaces 3A to 3E. |
