| 摘要 |
Inside a reception hole of a female member, there are formed with a first sliding contact portion relative to a first cam portion formed at an end of a shaft portion of a male member; an engagement concave portion relative to an engagement protrusion formed in a middle of the shaft portion of the male member; and a second sliding contact portion located at a hole opening of the reception hole relative to a second cam portion formed in the engagement protrusion of the male member. At an insertion time of the shaft portion into the reception hole, the first cam portion and the first sliding contact portion slidingly contact, and subsequently, the second cam portion and the second sliding contact portion slidingly contact so as to urge a forward-movement turning of the male member, which allows the engagement protrusion to be engaged with the engagement concave portion. When the male member is moved backward and turned from an engaged state between the engagement concave portion and the engagement protrusion, the second cam portion and an inner wall of the engagement concave portion slidingly contact so as to urge an elastic deformation in a direction of allowing the engagement protrusion to come out of the engagement concave portion. |
