| 摘要 |
The kit comprises a number of parts, each with an L-shaped seat (20), a hollow vertical post (40), a pair of cross-bars (41) and a hollow L-shaped cover (30) for the top side of the seat. The hollow seat includes a vertical extension inside its apex, having a first bore in its periphery. Curved grooves (22) are provided in both arms of the L in the slightly recessed upper part of the seat. A pair of square or rectangular bores (23) are located at a distance from each other inside the curved grooves. A pair of L-shaped slots (24) with transverse and vertical parts are located inside the square or rectangular bores. A guide groove (25) is provided in the seat apex, and a leaf spring (26) with an elastic block at its free end is provided on the inside of the seat apex. The hollow post is inserted into the hollow extension of the seat and the upper part of the post contains a V-shaped leaf spring with a protruding part (213) at one end, which can be passed through a bore in the post periphery and into the bore in the seat extension periphery. The cross-bars are pivotally engageable with the transverse direction parts of the L-shaped slots, and they also have an aligned bore (411) in their top ends for receiving an axial pin (412). The cover has a number of curved strips (31) in both arms for engaging with the curved grooves. A pair of interspaced vertical bars extending downwards from the bottom sides of the two arms of the cover to engage with the vertical parts of the L-shaped slots. A tongue (33) beneath the cover apex can be snap-fitted into the guide groove. An adjustment opening in the cover apex can be engaged with the elastic block. An Independent claim is also included for a second corner part kit, also comprising a hollow L-shaped seat, a hollow vertical post, a pair of cross-bars and an L-shaped cover.
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