Patent ID: 8704099

Claim:
A grommet having a silencer, wherein: the grommet is configured to be mounted on a wire harness routed through a through-hole in a vehicle body panel from an engine compartment side to a cabin interior side of an automobile, the grommet comprising: a small diameter tubular portion to which a wire harness is configured to be tightly fitted and inserted therethrough; and a large diameter tubular portion continuous to one end of the small diameter tubular portion, the large diameter tubular portion provided on an outer peripheral surface with a vehicle body engagement concavity configured to be tightly fitted to a peripheral edge of the through-hole; the silencer is made of rubber and is inserted into and fitted within the large diameter tubular portion, the silencer comprising: a flat circular piece blocking a central cavity of the large diameter tubular portion in a direction substantially orthogonal to an axis thereof; a wire harness insertion hole provided on the flat circular piece and communicating with the small diameter tubular portion of the grommet; and a slit extending from the wire harness insertion hole to an outer peripheral surface of the flat circular piece in order to allow sideways insertion of the wire harness into the wire harness insertion hole, wherein the slit comprises: an irregularly shaped line portion that defines a recess in a first opposing side of the flat circular piece that borders the slit and defines an enlargement on a second opposing side of the flat circular piece that borders the slit, the recess and the enlargement inhibiting separation of the flat circular piece, wherein the enlargement has a dimension larger than a dimension of the recess such that the enlargement is unable to pass through a front end of the recess.