Patent ID: 8661989

Claim:
An adjustable desk comprising: a desk board including front and rear ends; a supporting unit disposed between the desk board and the ground, with the supporting unit including a first leg pivotally connected with the front end of the desk board, with the first leg including first upper and lower holders, and a first ease, with the first upper holder connected with the desk board, with the first upper holder including a first rest pivotally connected with a lug, a first trough extended from the front end to the rear end of the desk board, and a first slot; with the first lower bolder connected with the first upper holder and including a first supporting portion to provide the adjustable desk securely standing on the ground, with the first case mounted between the first upper and lower holders and protruding out the first trough via the first slot, with the first case being hollow inside and including a first channel, wherein the first case includes a first orifice and a first cavity connecting and communicate with each other, with the first orifice extended crossing with the first cavity; and a first adjusting unit mounted between the desk board and the first leg, with the first adjusting unit including a screw shaft, at least one linkage, at least one level, a worm gear, and a worm shaft, with the screw shaft including a central portion, at least one outer screw portion, and an extending rod, with the at least one outer screw portion including two outer screw portions respectively extended from two opposite ends of the central portion to the two distal ends of the screw shaft, with the linkage including an inner screw portion engaged with the at least one outer screw portion, with the level pivotally connected between the linkage and the rear end of the desk board, with the worm gear connected with the screw shaft, with two ends of the extending rod respectively connected with the screw shaft and the worm gear, with the worm gear and the worm shaft rotatably received in the first leg, with the worm gear and the worm shaft engaged with each other, with the worm shaft being rotatable to drive the worm gear rotated, with the worm gear rotated to drive the screw shaft rotated, with the worm gear and the shaft received in the first channel, with the worm gear protruding out the first case via the first orifice and connecting with the extending rod, with the worm shaft extending through the first cavity and engaging with the worm gear; wherein the worm gear is able to drive the screw shaft, wherein while the screw shaft is rotated, the linkage is moved axially between two opposite ends of the at least one outer screw portion to drive the level pivoting with respect to the screw shaft, wherein the desk board is pivoted with respect to the first leg to adjust a slope angle formed between the desk board and the supporting unit steplessly without tools.