| 摘要 |
A SERVICE OUTLET BOX (2, 102) COMPRISES A BASE (107), AND A LID FRAME (4) MOUNTED VIA A PLURALITY OF RATCHET MECHANISMS RELATIVE TO THE BASE (107) EACH RATCHET MECHANISM COMPRISES A PIN (14,114) MOUNTED IN A SLEEVE (16,116), ONE OF THE PIN (14,114) AND SLEEVE (16,116) IS ASSOCIATED WITH THE BASE (107), AND THE OTHER OF THE PIN (14,114) AND SLEEVE (16,116) IS ASSOCIATED WITH THE LID FRAME (4). THE PIN (14,114) AND SLEEVE (16,116) ARE MOUNTED FOR RELATIVE ROTATION ABOUT A LONGITUDINAL AXIS BETWEEN (I) AN ENGAGED POSITION, IN WHICH A RATCHET AND PAWL OF THE RATCHET MECHANISM ARE ENGAGED SO THAT RELATIVE MOVEMENT OF THE PIN (14,114) AND SLEEVE (16,116) IN A FIRST DIRECTION PARALLEL TO THE LONGITUDINAL AXIS IS RESTRICTED BY THE RATCHET AND PAWL AND (II) A DISENGAGED POSITION IN WHICH RELATIVE MOVEMENT OF THE PIN (14,114) AND SLEEVE (16,116) IN THE FIRST DIRECTION IS PERMITTED. |
