| 摘要 |
A socket that receives and locks a plug has a cylindrical socket body, a plug-locking element provided in a first through-hole of the socket, a sleeve-operating element provided in a second through-hole of the socket, a sleeve, and a collar. The collar is movable between a first position (FIG. 1) and a second position where the collar allows radially inward displacement of the sleeve-operating element by the plug inserted into the socket. When the plug is inserted into the socket, first, a locking element-pushing portion of the plug pushes out the plug-locking element into a first recess of the sleeve and causes the plug-locking element to displace the sleeve rearward. As the plug is further inserted into the socket in this state, the plug engages and pushes the collar from the first position to the second position.
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