| 摘要 |
A chair includes a support having one or more vertical rails to slidably receive one or more brackets, each bracket includes an opening formed between two ears, a seat plate includes one or more cams disposed in the opening of the bracket and rotatably secured to the ears of the bracket with a shaft, to allow the seat plate to be rotated relative to the bracket and the support. The cam may engage with the rail to support the seat plate in a folding position when the seat plate is parallel to the support, and may also to engage with the rail to support the seat plate in an open and working position when the seat plate is perpendicular to the support.
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