Seal cover for in-vehicle electric device

摘要

A seal cover (S) for closing work openings provided in a case includes a cover main body (10) to cover openings of the case. Seal ring holders (20A, 20B) are arranged on the underside of the cover main body (10) and fit into the openings. Seal rings (25) are on the outer peripheral surfaces of the seal ring holders (20A, 20B) and closely contact inner peripheral surfaces of the openings. Insertion holes (13) penetrate between top and underside surfaces of the cover main body (10). Shafts (26) project from surfaces of the seal ring holders (20A, 20B) facing the underside surface of the cover main body (10) and are inserted into the insertion holes (13) with a clearance. Retainers (16) for retaining the shafts (26) are provided at the projecting ends of the shafts (26) and are engaged with the edges of the insertion holes (13).

主权项

1. A seal cover for in-vehicle electric device to be removably attached to close an opening in a case that houses an in-vehicle electric device, comprising:
a cover main body with an outer periphery shaped to cover the opening of the case and to be attached to a surface of the case, the cover main body including opposed top and underside surfaces, and at least one insertion hole penetrating the cover main body between the top and underside surfaces, the at least one insertion hole having an inner surface and a first diameter; at least one seal ring holder with an outer periphery smaller than the outer periphery of the cover main body, the at least one seal ring holder formed with opposite top and bottom surfaces and at least one shaft projecting from the top surface, the at least one shaft having an outer surface defining a second diameter sufficiently smaller than the first diameter, at least one seal ring mounted around the outer periphery of the at least one seal ring holder, the at least one seal ring holder configured to be mounted to the cover main body with the at least one shaft penetrating the at least one insertion hole and a clearance formed between the outer surface of the at least one shaft and the inner surface of the at least one insertion hole to allow lateral movement of the shaft within the at least one insertion hole, and the at least one seal ring holder with the seal ring mounted thereon configured to be partially inserted into the opening of the case with the seal ring bearing against at least a portion of an inner peripheral surface of the case; at least one retaining means engaged with the cover main body and the shaft for retaining the shaft; at least one pin provided on one of the seal ring holder and the cover main body and at least one respective restricting hole provided on the other of the seal ring holder and the cover main body, and a clearance provided between the pin and the restricting hole, the at least one pin and the at least one restricting hole preventing erroneous mounting of the seal ring holder on the cover main body or a rotational displacement of the seal ring holder with respect to the cover main body, wherein a clearance is provided between the pin and the restricting hole, the clearance between the at least one pin and the at least one restricting hole is smaller than the clearance between the shaft and the insertion hole.