| 摘要 |
<p>A support for a calendar block which consists of an L section plastics beam (1) with two bosses (5) is used which fit into the holes in the calendar leaves. The bosses (5) have a horse-shoe shaped cross-section with a flexible flap (6). It has been found that this flap (6) may break if deflected too far. A modification is used to overcome this problem. Two stops (8, 9) are moulded on the inner surface of the horse-shoe section (5) and a strengthening rib (10) is formed at the junction of the flap (6) with the beam (1).</p> |
