Patent ID: 6971656

Claim:
A movable bottom frame comprising: a frame body having a plurality of level rods pivotally connected with one another, said rods having two rear free ends respectively and pivotally connected with the lower portions of two support legs of a workable, two casters respectively assembled under said rods near the two pivotal joints of said two support legs, said rods having two front free ends provided thereon with a first pedal, a locking hook provided under said first pedal and able to be pivotally turned elastically, said locking hook able to carry out clasping when said first pedal is pedaled down, a second pedal connected with the opposite end of the clasping portion of said locking hook, said locking hook turned pivotally to carry out unhooking when said second pedal is pedaled down; two movable connecting rods having two rear free ends respectively and pivotally combined with the intermediate preset portions of said frame body, said two movable connecting rods having two front free ends respectively and pivotally connected with the lower portions of the other two support legs of said worktable, two casters respectively assembled under said two movable connecting rods near the two pivotal joints of said two support legs; and a locking rod having opposing ends respectively assembled under said two movable connecting rods near the pivotal joints of said two support legs, said locking rod having its intermediate portion clasped by said locking hook under said first pedal when said first pedal is pedaled down and said frame body is pivotally moved downward, wherein said plural rods of said frame body consist of two side rods and two oblique rods, said two side rods having their rear free ends respectively and pivotally connected with two support legs of said worktable, said two side rods having the inner sides of their front free ends respectively secured with the rear free ends of said two oblique rods, said two oblique rods having their two front free ends extending inward obliquely.