Patent ID: 7494149

Claim:
A support structure for supporting a table machine above the floor, comprising: a top frame unit for the mounting of the table machine, said top frame unit having a first pivot point, a second pivot point and a third pivot point orderly arranged at each of left and right sides thereof; and a. folding mechanism supporting said top frame unit and operable to be alternatively set between an extended position where said top frame unit is substantially kept in horizontal and a received position where said top frame unit is substantially kept in vertical, said folding mechanism comprising: a pair of first legs having a pair of first ends respectively pivoted to the first pivot points of said top frame unit, and a pair of second ends each having a bearing portion for supporting on the floor; a pair of second legs having a pair of first ends respectively pivoted to the second pivot points of said top frame unit, and a pair of second ends on each of which a wheel is rotatably mounted; a pair of first connecting members having a pair of first ends respectively pivoted to said third pivot points of said top frame unit, and a pair of second ends; a pair of second connecting members having a pair of first ends respectively pivoted to the second ends of said first connecting members, and a pair of second ends respectively pivoted to middle parts of said second legs; and a pair of third connecting members having a pair of first ends respectively pivoted to middle parts of said first connecting members, and a pair of second ends respectively pivoted to middle parts of said first legs; wherein when said folding mechanism is in said extended position, said first legs and said second legs are kept in a crossed manner; when said folding mechanism is moved from said extended position toward said received position, said first connecting members, said second connecting members and said third connecting members are moved with said second legs toward said first legs; when said folding mechanism is in said received position, said wheels are kept close to the bearing portions of said first legs.