Patent ID: 8341804

Claim:
A grommet which engages with a peripheral portion of an opening formed in an inserted member and is interposed between an inserting member inserted into said opening and said inserted member to attach said inserting member to said inserted member, comprising a tubular body portion having an insertion hole into which said inserting member is inserted, said body portion including a first flange portion shaped in a collar protruding radially outward of said body portion at one end and a second flange portion shaped in a collar protruding radially outward of said body portion at the other end which is opposite to said one end, wherein in an outer circumferential surface of said body portion, a groove portion is formed such that a part of said outer circumferential surface is depressed in an elongated shape along a circumferential direction of said outer circumferential surface between said first flange portion and said second flange portion in an axial direction, said groove portion engaging with said peripheral portion to attach said grommet to said inserted member, said first flange portion has a thrust surface on a side thereof, said second flange portion has another thrust surface on a side thereof such that said another thrust surface faces said thrust surface, said inserting member, having a leg portion and a head portion formed by increasing a diameter of a tip end of said leg portion, is inserted from said one end of said body portion into said insertion hole and is attached to said inserted member, on said one end, a diameter of said insertion hole is equal to or larger than a diameter of said head portion, and on said other end, said grommet has a small diameter portion in which a diameter of said insertion hole is smaller than the diameter of said head portion and is equal to or larger than a diameter of said leg portion, when said inserting member is inserted from said one end into said insertion hole, said inserting member abuts on an inner wall surface of said insertion hole, said thrust surface comes into surface contact with said inserted member, and said second flange portion is deformed such that the diameter of said insertion hole is increased, and when said inserting member attempts to be disengaged from said grommet, said inserting member abuts on said other end, said another thrust surface comes into surface contact with said inserted member, and said second flange portion is deformed such that the diameter of said insertion hole is reduced.