Grommet

Abstract

The present invention provides a grommet, made of an elastic body, which is externally mounted on a group of electric wires to be spanned between a car-body panel and a movable body consisting of a door or a trunk lid coupled to the car-body panel through a hinge member. The grommet has large-diameter cylindrical parts which are disposed on one and other ends thereof in a longitudinal direction thereof and have an annular locking groove respectively to be inserted into and locked to a through-hole formed through the car-body panel and a through-hole formed through the trunk lid respectively; small-diameter cylindrical parts continuous with the large-diameter cylindrical parts respectively; and a bellows-like cylindrical part provided between the small-diameter cylindrical parts with the bellows-like cylindrical part continuous with the small-diameter cylindrical parts. The bellows-like cylindrical part is bent in the shape of U, when the movable body is closed. The bellows-like cylindrical part has large-diameter mountain portions and small-diameter valley portions formed over a whole length thereof at regular intervals with the mountain portions continuous and alternating with the valley portions. In a state in which the bellows-like cylindrical part is bent in the shape of U, a thickness of a thick region including an apex of a bent portion therein is set larger than that of other region so that a curvature of the bent portion is large.

Dependencies are inferred from the claim text.