The connector (5), and provided with electrical contacts of the first key portion (6), the connector receptacle (20), the electrical contacts of the second cover member (40) locking member and the key groove (70) When equipped with a connector (5) is connected to (20) the connector receiver, the key portion is in contact with the (70) locking member, the push-up the lock member (70), the cover member by (70) the lock member ( By 40 fixed) is released, the front end face connector (5) (15af) presses the front cover member (40), cover member (40) is moved to the second position, the first I is characterized in that the electrical contacts are electrically connected to the second electrical contact.コネクタ(5)は、第1の電気接点と鍵部(6)とを具備し、コネクタ受け(20)は、第2の電気接点とカバー部材(40)と鍵溝とロック部材(70)とを具備し、コネクタ受け(20)にコネクタ(5)が接続された際、鍵部がロック部材(70)に当接し、該ロック部材(70)を押し上げ、ロック部材(70)によるカバー部材(40)の固定が解除され、コネクタ(5)の先端面(15af)がカバー部材(40)を前方に押圧することにより、カバー部材(40)は、第2の位置に移動され、第1の電気接点が第2の電気接点に電気的に接続されることを特徴とする。
