Height-adjustable desk

Abstract

A height-adjustable desk includes a base, a desk board assembly, a support arm assembly and a supporter. The desk board assembly is above the base, and the support arm assembly is a rhombic linkage mechanism. The support arm assembly includes a first arm segment, a second arm segment, a third arm segment and a fourth arm segment. Bottom ends of the first and second arm segments rotatably connect with the base, and top ends of the third and fourth arm segments rotatably connect with the desk board assembly. A top end of the first arm segment rotatably connects with a bottom end of the third arm segment, and a top end of the second arm segment rotatably connects with a bottom end of the fourth arm segment. The first and second arm segments, and the third and fourth arm segments connect in an engaging transmission manner, respectively.

1 . A height-adjustable desk, comprising:
 a base;   a desk board assembly above the base;   a support arm assembly, which is a rhombic linkage mechanism, wherein, the support arm assembly comprises a first arm segment, a second arm segment, a third arm segment and a fourth arm segment, both a bottom end of the first arm segment and a bottom end of the second arm segment rotatably connect with the base, both a top end of the third arm segment and a top end of the fourth arm segment rotatably connect with the desk board assembly, a top end of the first arm segment rotatably connects with a bottom end of the third arm segment, a top end of the second arm segment rotatably connects with a bottom end of the fourth arm segment, the bottom end of the first arm segment and the bottom end of the second arm segment connect in an engaging transmission manner, and the top end of the third arm segment and the top end of the fourth arm segment connect in an engaging transmission manner; and   at least one supporter, connecting with the base at one end of the at least one supporter, and connecting with the desk board assembly at another end of the at least one supporter, wherein, the at least one supporter is capable of extending and retracting to adjust a distance between the desk board assembly and the base in a vertical direction, and configured to support the desk board assembly to maintain the distance between the desk board assembly and the base in the vertical direction.   
     
     
         2 . The height-adjustable desk of  claim 1 , wherein the at least one supporter inclines relative to the vertical direction, a top end of the at least one supporter rotatably connects with the desk board assembly, and a bottom end of the at least one supporter rotatably connects with the base. 
     
     
         3 . The height-adjustable desk of  claim 2 , wherein the support arm assembly further comprises at least one of:
 a bottom gear seat at a joint of the first arm segment and the second arm segment, so that both the bottom end of the first arm segment and the bottom end of the second arm segment rotatably connect with the base through the bottom gear seat, wherein the bottom end of the first arm segment and the bottom end of the second arm segment are respectively provided with a first limit post and a second limit post, and the bottom gear seat is provided with a first arc chute and a second arc chute for accommodating the first limit post and the second limit post to slide respectively; or   a top gear seat at a joint of the third arm segment and the fourth arm segment, so that both the top end of the third arm segment and the top end of the fourth arm segment rotatably connect with the desk board assembly through the top gear seat, wherein the top end of the third arm segment and the top end of the fourth arm segment are respectively provided with a third limit post and a fourth limit post, and the top gear seat is provided with a third arc chute and a fourth arc chute for accommodating the third limit post and the fourth limit post to slide respectively.   
     
     
         4 . The height-adjustable desk of  claim 3 , wherein the first arm segment and the second arm segment are arranged along a first horizontal direction, the third arm segment and the fourth arm segment are arranged along the first horizontal direction, the first arm segment and the second arm segment are symmetrically arranged based on a symmetry axis extending in the vertical direction, and the third arm segment and the fourth arm segment are symmetrically arranged based on the symmetry axis; and
 wherein in the first horizontal direction, the top end of the at least one supporter and the bottom end of the at least one supporter are respectively located at different sides of the symmetry axis.   
     
     
         5 . The height-adjustable desk of  claim 4 , wherein the desk board assembly comprises a top frame and a desk board, both the third arm segment and the fourth arm segment rotatably connect with the top frame, the desk board fixedly connects with a top of the top frame, the top frame comprises a first end, the top end of the at least one supporter locates between the first end and the symmetry axis in the first horizontal direction, a distance between the first end and the symmetry axis in the first horizontal direction is L 1 , and a distance between the top end of the at least one supporter and the symmetry axis in the first horizontal direction is L 2 , wherein ⅓L 1 ≤L 2 ≤⅔L 1 ; and
 wherein, the base comprises a second end, the second end and the first end respectively locate at different sides of the symmetry axis in the first horizontal direction, the bottom end of the at least one supporter locate between the second end and the symmetry axis, a distance between the second end and the symmetry axis in the first horizontal direction is L 3 , and a distance between the bottom end of the at least one supporter and the symmetry axis in the first horizontal direction is L 4 , wherein ⅓L 3 ≤L 4 ≤⅔L 3 . 
 
     
     
         6 . The height-adjustable desk of  claim 5 , wherein the first arm segment and the second arm segment are arranged along the first horizontal direction, and a second horizontal direction is perpendicular to the first horizontal direction; and
 wherein the top end of the at least one supporter rotatably connects with the desk board assembly, the bottom end of the at least one supporter rotatably connects with the base, the top end and the bottom end of the at least one supporter are arranged at intervals along the first horizontal direction, and a plurality of supporters are arranged at intervals along the second horizontal direction.   
     
     
         7 . The height-adjustable desk of  claim 6 , wherein any two supporters are parallel to each other, alternately, any two adjacent supporters are arranged in a crossed way. 
     
     
         8 . The height-adjustable desk of  claim 1 , wherein at least one of the first arm segment is provided with a first groove, the second arm segment is provided with a second groove, the third arm segment is provided with a third groove, or the fourth arm segment is provided with a fourth groove. 
     
     
         9 . The height-adjustable desk of  claim 1 , wherein the first arm segment and the second arm segment are arranged along a first horizontal direction, and a second horizontal direction is perpendicular to the first horizontal direction; and
 wherein a plurality of support arm assemblies are arranged at intervals along the second horizontal direction.   
     
     
         10 . The height-adjustable desk of  claim 9 , wherein the height-adjustable desk further comprises at least one connecting bar, and at least one group of two first arm segments, two second arm segments, two third arm segments and two fourth arm segments of two adjacent support arm assemblies connects with the at least one connecting bar. 
     
     
         11 . The height-adjustable desk of  claim 1 , wherein the at least one supporter is an electrically driven telescopic rod or a mechanically driven telescopic rod. 
     
     
         12 . The height-adjustable desk of  claim 1 , wherein the height-adjustable desk further comprises at least two groups of auxiliary link assemblies, and each of the auxiliary link assemblies comprises:
 a slide rail fixedly connecting with the desk board assembly or the base; and   a link rod rotatably connecting with the support arm assembly at one end of the link rod, and slidably connecting with the slide rail through a pulley at another end of the link rod.   
     
     
         13 . A height-adjustable desk, comprising:
 a base;   a desk board assembly above the base;   two support arm assemblies arranged between the desk board assembly and the base in parallel, wherein, each of the two support arm assemblies is a rhombic linkage mechanism and comprises a first arm segment, a second arm segment, a third arm segment and a fourth arm segment, both a bottom end of the first arm segment and a bottom end of the second arm segment rotatably connect with the base, both a top end of the third arm segment and a top end of the fourth arm segment rotatably connect with the desk board assembly, a top end of the first arm segment rotatably connects with a bottom end of the third arm segment, a top end of the second arm segment rotatably connects with a bottom end of the fourth arm segment, the bottom end of the first arm segment and the bottom end of the second arm segment connect in an engaging transmission manner, and the top end of the third arm segment and the top end of the fourth arm segment connect in an engaging transmission manner;   a connecting bar, wherein at least one group of two first arm segments, two second arm segments, two third arm segments and two fourth arm segments of two adjacent support arm assemblies connects with the connecting bar; and   at least one supporter, connecting with the base at one end of the at least one supporter, and connecting with the connecting bar at another end of the at least one supporter, the at least one supporter is capable of extending and retracting to adjust a distance between the connecting bar and the base in a vertical direction, and the at least one supporter is configured to support the desk board assembly to maintain the distance between the connecting bar and the base in the vertical direction.   
     
     
         14 . The height-adjustable desk of  claim 13 , wherein the at least one supporter inclines relative to the vertical direction, a top end of the at least one supporter rotatably connects with the connecting bar, and a bottom end of the at least one supporter rotatably connects with the base. 
     
     
         15 . The height-adjustable desk of  claim 14 , wherein the support arm assembly further comprises at least one of:
 a bottom gear seat at a joint of the first arm segment and the second arm segment, so that both the bottom end of the first arm segment and the bottom end of the second arm segment rotatably connect with the base through the bottom gear seat, wherein the bottom end of the first arm segment and the bottom end of the second arm segment are respectively provided with a first limit post and a second limit post, and the bottom gear seat is provided with a first arc chute and a second arc chute for accommodating the first limit post and the second limit post to slide respectively; or   a top gear seat at a joint of the third arm segment and the fourth arm segment, so that both the top end of the third arm segment and the top end of the fourth arm segment rotatably connect with the desk board assembly through the top gear seat, wherein the top end of the third arm segment and the top end of the fourth arm segment are respectively provided with a third limit post and a fourth limit post, and the top gear seat is provided with a third arc chute and a fourth arc chute for accommodating the third limit post and the fourth limit post to slide respectively.   
     
     
         16 . The height-adjustable desk of  claim 15 , wherein the first arm segment and the second arm segment are arranged along a first horizontal direction, and the third arm segment and the fourth arm segment are arranged along the first horizontal direction, the first arm segment and the second arm segment are symmetrically arranged based on a symmetry axis extending in the vertical direction, and the third arm segment and the fourth arm segment are symmetrically arranged based on the symmetry axis; and
 wherein in the first horizontal direction, the top end of the at least one supporter and the bottom end of the at least one supporter respectively locates at different sides of the symmetry axis.   
     
     
         17 . The height-adjustable desk of  claim 16 , the desk board assembly comprises a top frame and a desk board, both the third arm segment and the fourth arm segment rotatably connect with the top frame, the desk board fixedly connects with a top of the top frame, the top frame comprises a first end, the top end of the at least one supporter locates between the first end and the symmetry axis in the first horizontal direction, a distance between the first end and the symmetry axis in the first horizontal direction is L 1 , and a distance between the top end of the at least one supporter and the symmetry axis in the first horizontal direction is L 2 , wherein ⅓L 1 ≤L 2 ≤⅔L 1 ; and
 wherein, the base comprises a second end, the second end and the first end respectively locates at different sides of the symmetry axis in the first horizontal direction, the bottom end of the at least one supporter locates between the second end and the symmetry axis, a distance between the second end and the symmetry axis in the first horizontal direction is L 3 , and a distance between the bottom end of the at least one supporter and the symmetry axis in the first horizontal direction is L 4 , wherein ⅓L 3 ≤L 4 ≤⅔L 3 . 
 
     
     
         18 . The height-adjustable desk of  claim 17 , wherein the first arm segment and the second arm segment are arranged along the first horizontal direction, and a second horizontal direction is perpendicular to the first horizontal direction; and
 wherein the top end of the at least one supporter rotatably connects with the desk board assembly, the bottom end of the at least one supporter rotatably connects with the base, the top end and the bottom end of the at least one supporter are arranged at intervals along the first horizontal direction, a plurality of supporters are arranged at intervals along the second horizontal direction.   
     
     
         19 . The height-adjustable desk of  claim 13 , wherein the at least one supporter is an electrically driven telescopic rod or a mechanically driven telescopic rod. 
     
     
         20 . The height-adjustable desk of  claim 13 , wherein the height-adjustable desk further comprises at least two groups of auxiliary link assemblies, and each of the auxiliary link assemblies comprises:
 a slide rail fixedly connecting with the desk board assembly or the base; and   a link rod rotatably connecting with the support arm assembly at one end of the link rod, and slidably connecting with the slide rail through a pulley at another end of the link rod.