| 摘要 |
The socket of the plug fastener is formed in its inside peripheral surface with axial grooves and at their rear ends is formed with a gear, each of the teeth of which has an inclined driving tooth face. The plug of the plug fastener comprises a head piece, which is adapted to be axially spring-loaded in the socket and is formed with radial ribs and is rotatably mounted in a driving sleeve of the plug. That driving sleeve is provided on its outside peripheral surface with radially and axially extending ribs and has a forward end face formed with prismatic teeth. The plug is adapted to be inserted into the socket with the ribs of the head piece and the ribs of the driving sleeve sliding in axial grooves of the socket. When the head piece has been inserted into the socket beyond the gear the head piece is adapted to be rotated by two-step angular movements to first and second angular positions in alternation and in said first angular position is adapted to be axially pulled out of said socket and in said second angular position is locked in said socket. The first step of each of said angular movements is imparted to the head piece in that the teeth of the driving sleeve cooperate with beveled rear faces of the ribs of the head piece. The second step of each of said angular movements is imparted to the head piece in that the beveled rear faces of the ribs of the head piece cooperate with the inclined tooth faces of the gear of the socket during an axial displacement of the plug in the socket. As a result, the plug can be locked and unlocked in the socket in alternation in that the plug is repeatedly axially pushed into the socket as far as to a stop. |
