| 摘要 |
A bayonet connection structure between a container mouth portion and a cap is provided in which a crush and abrasion of a rotation prevention portion on a container mouth portion side is prevented. A cap 11 includes a plurality of slip prevention claws 12 and 13 spaced apart from each other in a circumferential direction on an inner circumferential surface, one of the plurality of slip prevention claws 12 and 13 is the slip prevention claw 12 elastically displaceable in a radial direction, and a rotation prevention projection 14 extending in an axial direction is provided between the elastically-displaceable slip prevention claw 12 and each of the other slip prevention claws 13. On the other hand, a mouth portion 21 of a container 20 has a hollow cylindrical portion 22 with an outer circumferential surface provided with a plurality of slip prevention claw engagement portions 23 with which the plurality of slip prevention claws 12 and 13 of the cap 11 engage, the slip prevention claw engagement portions 23 being as many as the plurality of slip prevention claws, each of the slip prevention claw engagement portions 23 engaging with the other slip prevention claws 13 has an end in a clockwise direction provided with a rotation prevention stopper 24 adjacently extending in an axial direction, and the mouth portion 21 further includes a rotation prevention rib 25 to be got over by the rotation prevention projection 14 of the cap 11 when the cap 11 is rotated. |
