| 摘要 |
PROBLEM TO BE SOLVED: To provide a hinge cap capable of maintaining lid closing state surely and reducing control force for opening the lid.SOLUTION: The hinge cap 1 comprises: a cap body 20 attached to a container mouth 51; and a lid body 40 coupled to the cap body 20 so as to oscillate freely through a hinge 30. On the cap body 20, a top wall 21 for covering the container mouth 51, an injecting cylinder 22 erecting from the top wall 21, an annular upper wall 29 which is annular shape and erecting from the top wall 21 on an outer periphery of the injecting cylinder 22, and an engaging projection 29a provided on an outer periphery of an upper end of the upper wall 29 are provided. On the lid body 40, an apex wall 41, an outer peripheral wall 42 suspended on a peripheral edge of the apex wall 41, and an engaging concavity 42a provided over an inner periphery of an inner peripheral surface of a lower end of the outer peripheral wall 42 and engaging with the engaging projection 29a of the upper wall 29 of the cap body 20 are provided. On the upper wall 29 of the cap body 20, a thin wall part 29u having a thickness which becomes thinner from an inner peripheral side is provided on an opposite side of the hinge 30. |
