| 摘要 |
<p>A jack (1) carries at its forward end a sleeve (7) of a noncircular outside shape and having grooves (12) cut in its outer periphery. A plug (20) has a ring (30) rotatably mounted thereon at one end thereof for receiving the sleeve (7), and a sleeve receiving hole (31) of the ring (30) has a shape complementary to the outside shape of the sleeve (7). By turning the ring (30) through 90 DEG (B into engagement with the grooves (12), the jack (1) and the plug (20) are connected in a state in which they are prevented from disengagement. <IMAGE></p> |
