| 摘要 |
The collapsible frame is for support of a cover, and comprises a number of U-shaped stirrups with arm ends articulated to a chassis. In the collapsed state, the stirrups rest one on top of the other, and their material has either a solid or a tubular cross-section, with an outer dia. or lateral length in a plane at right-angles to the plane of the stirrup equal to x. The arm ends have a pair of L-shaped angle pieces with an intermediary space equal to the outer dia. or outer side length in the stirrup plane, and the part of the first stirrup L-shape at right-angles to the arms is equal to 2x, and for the second stirrup is equal to 3x. The part of the L-shape at its free end has a hole, the centre of which is at a distance equal to half x from the part end and sides. |
