| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hole plug which can improve water tightness without increasing insertion power. <P>SOLUTION: The hole plug includes a main cylinder which is inserted in an attachment hole formed at a member to be attached and blocks the attachment hole, an umbrella shaped large size flange which is extended from the opening end of the main cylinder to the outer circumference, a sub-cylinder which is arranged inside the main cylinder and has an opening at an end in the opposite direction to the main cylinder, and a small umbrella shaped flange which is extended from the opening end of the sub cylinder to the outer circumference. Since the member to be attached that is attached to the main cylinder is sandwiched and held by the umbrella shaped large size flange and the umbrella shaped small flange, the water tightness can be improved without increasing the insertion power. <P>COPYRIGHT: (C)2013,JPO&INPIT |
