| 摘要 |
An object of the present invention is to provide a plug/socket assembly in which the plug will never pull out of the socket even if an excessive pull-out force is applied to the plug. A plug/socket assembly ( 10 ) comprises a plug ( 20 ) and a socket ( 30 ) for receiving and fixing the plug ( 20 ) therein. The socket ( 30 ) includes a socket main body ( 31 ) having a plug insertion hole ( 311 ), balls ( 32 ) which are provided with the socket main body ( 31 ) in a radially displaceable manner with respect to the plug insertion hole ( 311 ), a sleeve ( 33 ) which is mounted over the outer surface of the socket main body ( 31 ) and is displaceable along the axial direction of the plug insertion hole ( 311 ), and a compression spring ( 34 ) for urging the sleeve ( 33 ) along the axial direction toward the inlet port ( 313 ) of the plug insertion hole. The inner surface of the sleeve is provided with a slide surface ( 332 ). The slide surface has first to fourth regions (P 1 -P 4 ). The fourth region (P 4 ) is shaped such that with an external pull-out force being applied to the plug, even if the balls apply a radially outward force to the slide surface, no leftward force to push back the sleeve will be produced.
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