| 摘要 |
The support has a plastics plate (6) with areas of different thicknesses. The thickness of the plate varies across the direction of movement (a) of two movable end parts (7,8). The plate has spring elements (12) which are tensioned by moving the end parts towards each other. The spring element is formed by reinforcing the material of the plate parallel to the two movable part with metal, e.g. a steel strip. The ends of the spring element fit into holders (13,14) on the plate. |
