Adjustable desk

• US 8,661,989 B2
• Filed: 12/28/2011
• Issued: 03/04/2014
• Est. Priority Date: 12/28/2011
• Status: Expired due to Fees

• Current Assignee: Sing Bee Enterprise Co., Ltd.
• Original Assignee: Sing-Bee Enterprise Company Limited
• Inventors: Tsai, Chi-Cheng, Hsieh, Te-Ju
• Primary Examiner(s): TRAN, HANH VAN
• Application Number:
  US13/338,878
• Publication Number:
  US 20130167757A1
• Time in Patent Office: 797 Days
• Field of Search: 108/3, 108 6- 10, 108/145, 108/147, 108/50.02, 108/20
• US Class Current: 108/10
• CPC Class Codes: A47B 13/081 Movable, extending, sliding table tops
• CPC Class Codes: A47B 2200/0042 Height and inclination adjustable desktop, either separately or simultaneously
• CPC Class Codes: A47B 9/04 with vertical spindle

Abstract

An adjustable desk includes a desk board, a supporting unit, and a first adjusting unit. The desk board includes front and rear ends. The supporting unit disposed between the desk board and the ground includes a first leg pivotally connected with the front end. The first adjusting unit mounted between the desk board and the first leg includes a screw shaft, at least one linkage, and at least one level. The linkage is engaged screwedly with screw shaft. The level pivotally connected between the linkage and the rear end. While the screw shaft is rotated, the linkage is moved axially between two ends of the outer screw portions to drive the level pivoting with respect to the screw shaft. 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.

Claims

1. 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.

2. The adjustable desk as claimed in claim 1 wherein the desk board includes first and second panels, with the first panel including a lug disposed adjacent to the front end and a seat disposed adjacent to the rear end, with the seat mounted on a stern and the stem connected between two sides of the seat, with at least one end of the stem pivotally connected with the level, with the second panel connected with the supporting unit.

3. The adjustable desk as claimed in claim 2 wherein the first adjusting unit includes two linkages and two levels, with each linkage including an inner screw portion engaged with the at least one outer screw portion;

wherein while the screw shaft is rotated, each linkage is moved axially between the two opposite ends of the at least one outer screw portion, with each level pivotally connected between the one linkage and the stem;

wherein while each linkage is moved axially with respect to the at least one outer screw portion, wherein each linkage drives the level to pivot with respect to the stem, whereby a height defined between the desk board and the screw shaft is adjusted.

4. The adjustable desk as claimed in claim 2 wherein the lug is formed in an L shape, wherein the seat is formed in a U shape, wherein the stem is formed in an I shape.

5. The adjustable desk as claimed in claim 1 further comprising a control unit including a first control assembly mounted on the first leg, with the first control assembly including a first control bar, a first expansion bar, a first lid, and a first shank, with the first control bar rotatably received in the first trough, with first outer and inner axle seats mounted on a bottom of the first trough supporting the first control bar, with the first control bar including a first pin hole disposed at an end thereof and a first flange, with the first control bar entering into the first case via the first cavity and connected with the worm shaft, with the first expansion bar connected slidably with respect to the first control bar, with the first expansion bar including a first siding trench disposed corresponding to the first pin hole, with a first pin passing the first siding trench and connecting with the first pin hole, wherein the first flange is able to block the first expansion bar, with an end of the first lid mounted on the first expansion bar, with another end of the first lid pivotally connected with the first shank.

6. The adjustable desk as claimed in claim 5 wherein the first upper holder includes two first guide posts, with the first lower holder including two first outer tubes, a first side cover, and a first through hole, with the two first outer tubes slidably and movably connected with the two first guide posts, with the first side cover connecting between the two first outer tubes, with the first through hole disposed parallel to the first side cover and vertical to the first supporting portion.

7. The adjustable desk as claimed in claim 6 wherein the first leg includes a first box, and a first inner tube, with the first box mounted between the first upper and lower holders, Wherein the first box includes a first receiving portion, a first bore, two first guide grooves, and a first aperture, with the first receiving portion, the first bore, and the first aperture connecting and communicate with each other, with the two first guide grooves respectively receiving the two first guide posts, with the first inner tube mounted on the first box and received in the first through hole, with the first box capable of moving slidably with respect to the lower holder.

8. The adjustable desk as claimed in claim 7 wherein the supporting unit includes a second leg mounted on a bottom of the desk board, and a beam connecting between first and second legs, with the beam including a pore.

9. The adjustable desk as claimed in claim 8 wherein the second leg includes a second upper holder, a second lower holder, a second box, a second case, and a second inner tube.

10. The adjustable desk as claimed in claim 9 wherein second adjusting unit is mounted in the supporting unit for adjusting the height between the desk board and ground, wherein the second adjusting unit includes two supporting pipes, two sleeves, first and second screw bars, first, second, third gear assemblies, and a linking rod.

11. The adjustable desk as claimed in claim 10 wherein the two supporting pipes are respectively disposed in the first and second inner tubes, with the two sleeves respectively mounted on an end of the two supporting pipes, with each sleeve including a screw hole, with the first screw bar movably extended in the supporting pipes disposed in the second inner tubes, with the first screw bar having a screw portion engaged with the screw hole, with the first screw bar passing through the second box and the second case and connected with the first and second gear assemblies, with the second screw bar movably extended in the supporting pipes disposed in the first inner tube, with the second screw bar having a screw portion engaged with the screw hole of the sleeve, with the second screw bar passing through the first box and connected with the third gear assembly.

12. The adjustable desk as claimed in claim 11 wherein the first gear assembly is received in the second case and includes two first bevel gears respectively connected with the first screw bar and second control assembly, with the two first bevel gears engaged with each other, wherein the second gear assembly is received in the second box and includes two second bevel gears respectively connected with the first screw bar and the linking rod, with the two second bevel gears engaged with each other, wherein the third gear assembly is received in the first receiving portion and includes two third bevel gears respectively connected with the second screw bar and the linking rod, with the two third bevel gears engaged with each other.

13. The adjustable desk as claimed in claim 12 wherein the linking rod is received in the pore of the beam, with an end of the linking rod passing through the second box and connecting with the second gear assembly, with another end of the linking rod passing through the first bore and connecting with the third gear assembly.

14. The adjustable desk as claimed in claim 12 wherein the control unit includes a second control assembly mounted on the second leg, with the second control assembly including a second control bar, a second expansion bar, a second lid, and a second shank, with the second control bar rotatably received in the second upper holder, with the second control bar including a second pin hole disposed at an end thereof and a second flange, with the second control bar entering into the second case and connected with one of the two first bevel gears disposed parallel to the second control bar, with the second expansion bar connected with and slidable with respect to the second control bar, with the second expansion bar including a second siding trench disposed corresponding to the second pin hole, with a second pin passing the second siding trench and connecting with the second pin hole, Wherein the second flange is able to block the second expansion bar, with an end of the second lid mounted on the second expansion bar, with another end of the second lid pivotally connected with the second shank.