(57) A cover assembly (1) for an inspection opening, in particular a wall inspection opening,
of a lavatory, having a frame (2) which fits to an opening in a wall; a plate (3)
fixable removably to the frame; and a lock member (20) for securing the plate to the
frame or releasing the plate from the frame; the lock member (20) has a head (22)
which rests against an edge (7) of the plate (3), and the lock member is inserted
inside a seat (23) so as to rotate between a lock position, in which the lock member
is interposed between the edge (7) of the plate and a stop member (40) on the frame
(2) to prevent movement of the plate with respect to the frame in a predetermined
direction (D), and a release position, in which the lock member (20) is slidable axially
inside the seat (23) to permit movement of the plate with respect to the frame in
the aforementioned predetermined direction.
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