Patent ID: 7597302

Claim:
An elevation-adjustable support structure comprising: a connecting member, said connecting member having a bottom end and a top end; a bottom hinge structure, said bottom hinge structure comprising two bottom brackets, and at least one shaft fastened to said bottom brackets and pivoted to the bottom end of said connecting member for allowing said connecting member to be turned about the at least one shaft of said bottom hinge structure between said two bottom brackets; a top hinge structure, said top hinge structure comprising two top brackets, and at least one shaft fastened to said top brackets and pivoted to the top end of said connecting member for allowing said connecting member to be turned about the at least one shaft of said top hinge structure between said two top brackets; and at least one linking mechanism, said at least one linking mechanism each comprising a top wheel respectively coupled between the top end of said connecting member and the top brackets of said top hinge structure, a bottom wheel respectively coupled between the bottom end of said connecting member and the bottom brackets of said bottom hinge structure, and a flexible belt member coupled between said top wheel and said bottom wheel for maintaining the angle of inclination of said top brackets upon a rotary motion of said connecting member relative to said top hinge structure and said bottom hinge structure.