| 摘要 |
<p>A picture frame comprises mitred metallic frame sections (12), each of which has a locking channel (18) and a rearwardly facing opening (25), and a corner piece (28) in each corner of the frame to lock adjacent frame sections together. Each corner piece comprises an L-shaped locking plate (30) and an L-shaped backing plate (32), with the legs of each plate extending into the locking channels of adjacent frame section. In one embodiment, each locking plate has a single threaded aperture (35) at the junction of the two legs which form the L and a screw (34) extending through the aperture into engagement with the associated backing plate. The screw is accessible through the rearwardly facing opening of adjacent frame sections at their mitred junction. In a second embodiment, a cam (48) positioned at the junction of the legs of the two plates is rotated to force the plates apart.</p> |
