Patent ID: 8016601

Claim:
A cap for being removably mounted on a fitting portion of a connector that is adapted to receive a mating connector, the cap comprising: a cylindrical insertion portion which is insertable into the fitting portion of the connector and has a hollow space for preventing contact with a contact of said connector disposed inside said fitting portion; a planar cover portion which is continuous with said insertion portion, and which is adapted to cover an opening of the fitting portion; and a reinforcing portion which suppresses deformation of said insertion portion; wherein said reinforcing portion is approximately plate-like in shape and is formed on an inner peripheral surface of said insertion portion at a location corresponding to a location on an outer peripheral surface of said insertion portion at which a spring piece formed on the fitting portion of the connector is engageable; wherein said reinforcing portion reaches another inner peripheral surface of the insertion portion which is in a mutually facing arrangement with said inner peripheral surface, and partitions the hollow space of the insertion portion; wherein said reinforcing portion extends in a direction of action of a spring force of the spring piece; and wherein the spring piece comprises a locking spring piece for locking the mating connector.