| 摘要 |
PROBLEM TO BE SOLVED: To inhibit the deterioration of waterproof performance compared to a conventional example.SOLUTION: An end member 7 includes: a bottom wall 70 which closes an opening end of a case body 6; a cylindrical inner wall 71 inserted into the case body 6; and a cylindrical outer wall 72 which faces the inner wall 71 across a peripheral wall of the case body 6. A waterproof packing 8 includes: a first protruding piece 80 sandwiched between the peripheral wall of the case body 6 and the outer wall 72; a second protruding piece 81 sandwiched between the peripheral wall of the case body 6 and the inner wall 71; and a connection part 82 connecting the first protruding piece 80 with the second protruding piece 81 and sandwiched between the peripheral wall of the case body 6 and the bottom wall 70. That is, the first protruding piece 80 and the second protruding piece 81 closely adhere to the peripheral wall of the case body 6 from a thickness direction. Thus, even when a diameter of the peripheral wall of the case body 6 is expanded by influences such as expansion and contraction resulting from temperature change, the deterioration of the degree of adhesion is prevented between the peripheral wall of the case body 6 and the waterproof packing 8. |
