| 摘要 |
A child barrier for installation in a passage or the like comprises a frame with two side portions ( 4 ) which, in use, are positioned adjacent the walls of the passage, each side portion ( 4 ) carrying one or more vertically spaced abutment members ( 20 ) for engagement with an adjacent wall. The abutment members on at least one of the side portions is connected thereto by an adjustment mechanism, each adjustment mechanism comprising an elongate threaded member ( 18 ), one end of which is connected to the associated abutment member ( 20 ) and the other end of which is longitudinally slidably received in the associated side portion. Each adjustment mechanism also includes an adjustment member ( 24 ) in screw threaded engagement with the threaded member ( 18 ). The adjustment member ( 24 ) and the associated side portion ( 4 ) of the frame afford respective surfaces opposed to one another, on one of which there is at least one resilient locking projection ( 28 ) and on the other of which there is at least one cooperating locking recess ( 34 ). At least one of the projection and recess has two inclined ramp surfaces ( 30, 32 ) extending in opposite circumferential directions of the threaded member. One of the ramp surfaces ( 30 ) is inclined at a relatively shallow angle to a plane ( 26 ) extending radially of the threaded member and the other ramp surface ( 32 ) is inclined at a relatively steep angle thereto. |
