| 摘要 |
PROBLEM TO BE SOLVED: To easily and firmly combine the upper cover and the cap body and reduce the material cost and the molding cost, by providing a connection block on the upper cover through a hinge and forming a connection part provided with a protrusion-recession fitting means fitted and connected to a protrusion- recession fitting means formed at the connection part of the cap body, in the connection block. SOLUTION: A cap body 1 is provided with a connection part 8 having a protrusion-recession fitting means at the top wall. And the upper cover 2 is integrally provided with a connection block 22 through a hinge 25 at the lower end of the circular wall 20. And hence, the connection block 22 is folded back and an elliptic groove 26 and round holes 27 formed in the connection block 22 of the upper cover 2 are pressed on the elliptic wall-shaped protrusion 10 and a columnar protrusion 11 of the connection part 8 formed in the hollow face 9 of the top wall of the cap body 1 and fitted thereto. The positioning for the connection of the protrusions 10, 11 and recessions 26, 27 is secure and after the connection, the connection part is not displaced and loosened and it is firmly integrated. The cap body can be securely hermetically sealed by the upper cover. |
