Patent ID: 7952032

Claim:
A grommet having an elastic body and externally mounted on a group of electric wires spanned between a vehicle-body panel and a trunk lid coupled to the vehicle-body panel with a hinge, comprising: short large-diameter tubular sections provided at both ends thereof in a lengthwise direction, the short large-diameter tubular sections having annular locking grooves inserted into and locked to through-holes respectively provided in the vehicle-body panel and the trunk lid; long small-diameter tubular sections continuous with the short large-diameter tubular sections at the both ends, respectively; and a corrugated tubular section continuously provided between the long small-diameter tubular sections at the both ends, the corrugated tubular section being bent into a U shape when the trunk lid is closed, wherein the long small-diameter tubular section at the locking side for the vehicle-body panel is longer than the long small-diameter tubular section at a trunk lid side; a rib is continuously provided, at the locking side for the vehicle-body panel alone, on an inner peripheral side of the corrugated tubular section bent into the U shape, from an outer surface at a position on the long small-diameter tubular section proximate to a side continuous with the corrugated tubular section to an approximately middle point between a bent end of the corrugated tubular section bent into the U shape and an end of the corrugated tubular section continuous with the long small-diameter tubular section, over a position, at which the long small-diameter tubular section and the corrugated tubular section are connected; the rib is continuously provided on outer surfaces of large-diameter ridge portions and small-diameter valley portions alternately provided on the corrugated tubular section and projects out of the large-diameter ridge portions; and a rigidity of the rib prevents the corrugated tubular section from curving outward at the locking side for the vehicle-body panel and from contacting the hinge.