Sumitomo Electric Industries, Limited

Sumitomo Wiring Systems, Limited

Mitsuru Itoh

Nori Inoue

Satoshi Takano

Hitoshi Okumura

Kensaku Takata

Masaji Suzuki

A connector assembly with a bad-connection-preventive function is disclosed. It is simple in structure, made up of a small number of parts, and has high long-term reliability. It has a second connector having an integral locking arm and a first connector. Protrusions A and B are formed on side faces of the locking arm and the side faces of the first connector, respectively. A spring is mounted in the first connector. By inserting the second connector into the first connector, the locking arm is pushed upward by the protrusions B, so that its shoulder portion abuts the spring. Thus, the spring is compressed when the second connector is further pushed into the first connector. The connectors are thus urged in a direction away from each other by the spring. The spring disengages when the connectors are completely coupled together. When pulling the second connector out of the first connector, the protrusions A pass under the protrusions B.

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Yokkaichi, Japan

Mitsuru Itoh