The present invention relates to a simple desk attached to a chair, and its purpose is to be installed on the back of a folding simple chair or a general chair, and the base plate of the simple desk can be folded up and down, which is convenient when a notebook or other desk is needed. It is to provide a simple desk attached to the chair that can be used.;The present invention for achieving the above object, in the general chair, the assembly portion 5 is assembled and fixed by the assembly bolt 51 on the back of the backrest, and formed integrally with the assembly portion 5, the upper end A guide portion (4) having a locking groove (42) for keeping the support plate (1) horizontal and preventing separation, and having a guide hole (41) to the left and right of the center portion, and a guide slide of the guide portion (4) 41, a support member 3 integral with two protruding pieces 31 and 32 located in the inner and locking grooves 42, and a support plate 1 coupled to the support member 3 by bolts 2; Let that thing be about the technical gist.
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