A four-legged height-adjustable table

Abstract

This utility model discloses a four-legged height-adjustable desk, comprising four sets of height-adjustable desk legs positioned at four locations on the desktop. Each set of height-adjustable desk legs is equipped with a power connection component, and each set of desk legs contains a vertically arranged transmission screw that drives it to rise or fall. The transmission screw is poweredly connected to the power connection component of the corresponding height-adjustable desk leg. At least three adjacent sets of power connection components are connected via a transmission component, driving the four transmission screws to rotate simultaneously, and the four height-adjustable desk legs together drive the desktop to rise or fall. Thus, the rotation of the four transmission screws is linked through the power connection components, achieving synchronous and consistent lifting of the four height-adjustable desk legs. Inputting power to any one of the power connection components, transmission screws, or transmission components can achieve synchronous and simultaneous action of the four height-adjustable desk legs, effectively facilitating operation during height adjustment. Furthermore, the four-legged support structure provides better overall stability, making it particularly suitable for height-adjustable study desks equipped with high bookshelves or integrated desk lamps.

Description

Technical Field

[0001] This utility model relates to the field of height-adjustable desks, and in particular to a four-legged height-adjustable desk. Background Technology

[0002] Tables are a common type of furniture, widely used in ordinary homes and offices. People have increasingly higher requirements for tables, especially since people of different heights have different requirements for table height. Traditional fixed-height tables have certain limitations and cannot meet the needs of different users. Therefore, there is a desire to improve the functionality of adjustable table height.

[0003] In the existing technology, height-adjustable tables are generally adjusted by using tools to remove bolts, adjust them to the appropriate fixing holes, and then fix them. This is relatively simple to operate for chairs that are small in size and weight, but it is more inconvenient for tables that are large in both size and weight.

[0004] In addition, existing height-adjustable desks, especially height-adjustable study desks, generally have a double-leg support structure, which results in poor overall stability, especially when combined with a tall bookshelf or integrated desk lamp. Utility Model Content

[0005] To address the aforementioned issues, this application provides a structurally sound four-legged height-adjustable desk, enabling synchronized and consistent lifting of the four legs, facilitating easy adjustment. Furthermore, the four-legged support structure offers enhanced overall stability, making it particularly suitable for height-adjustable study desks equipped with tall bookshelves or integrated desk lamps.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A four-legged height-adjustable table includes four sets of height-adjustable table legs positioned at four locations on the tabletop. Each set of height-adjustable table legs is equipped with a power connection component, and each set of height-adjustable table legs contains a vertically arranged transmission screw that drives it to rise or fall. The transmission screw is poweredly connected to the power connection component of the corresponding height-adjustable table leg. At least three adjacent sets of power connection components are connected via a transmission component to drive the four transmission screws to rotate simultaneously, and the four height-adjustable table legs together drive the tabletop to rise or fall.

[0008] As a further improvement to the above technical solution:

[0009] The power connection assembly includes at least two sets of adjacent three-way power connection assemblies. The two sets of three-way power connection assemblies are connected by a connecting shaft as a transmission element. The three-way power connection assembly connected to the connecting shaft is connected to another adjacent power connection assembly by a transmission shaft as a transmission element. A single set of three-way power connection assemblies connects the rotational power in three axial directions: the axial rotation of the transmission screw, the axial rotation of the connecting shaft, and the axial rotation of the transmission shaft.

[0010] The power connection component other than the three-way power connection component is a two-way power connection component, which is connected to the three-way power connection component via a drive shaft; a single two-way power connection component connects the axial rotation of the drive screw and the axial rotation of the drive shaft, thus connecting the rotational power in two axial directions.

[0011] The structure of the three-way power connection assembly is as follows: it includes an outer shell, a transmission screw is rotatably mounted through the bottom surface of the outer shell, and a lifting transmission gear is fitted at the top of the transmission screw located inside the outer shell; a horizontal rotating shaft is rotatably mounted between the opposing side walls of the outer shell, and a gear is fitted on the horizontal rotating shaft located inside the outer shell; it also includes a gear shaft rotatably mounted on the outer shell, which may be one or two coaxially arranged, and a gear is fitted at the end of the gear shaft located inside the outer shell; the lifting transmission gears one and two mesh with gear one to form power transmission in three directions: horizontal rotating shaft one, gear shaft, and transmission screw.

[0012] One end of the horizontal rotating shaft and the outer end of one gear shaft are connected to the connecting shaft and the transmission shaft for power connection. The other end of the horizontal rotating shaft and / or the outer end of another gear shaft constitute the power input end. An adjustment hole is provided corresponding to the power input end for external tools to be inserted.

[0013] The structure of the two-way power connection assembly is as follows: it includes lateral housings arranged and mounted facing each other, a horizontal rotating shaft II is installed between the lateral housings, the horizontal rotating shaft II is coaxially arranged with the transmission shaft and is poweredly connected at the end, and a gear III is sleeved on the horizontal rotating shaft II located inside the lateral housing; a transmission screw is rotatably mounted through the bottom surface of the lateral housing, and a lifting transmission gear II is mounted at the top of the transmission screw, and the lifting transmission gear II meshes with the gear III.

[0014] The four sets of lifting table legs are paired up in pairs, and the top of the paired lifting table legs is connected by a support pipe, with the top of the two support pipes supporting the tabletop.

[0015] The three-way power connection assembly and its corresponding drive shaft, and the power connection assembly connected via the drive shaft, are housed in the same branch pipe, with the connection shaft connecting between two branch pipes; or,

[0016] Two three-way power connection components and their connecting shaft are housed in the same branch pipe, two power connection components are housed in another branch pipe, and two drive shafts are respectively connected between the two branch pipes.

[0017] The branch pipe and the two adjustable table legs together constitute a table leg assembly; the bottom ends of the two adjustable table legs in the table leg assembly are jointly equipped with supports, and / or, a crossbar is jointly installed between the two branch pipes, and / or, a connecting rod is jointly installed between the table leg assemblies of the two branch pipes.

[0018] The connecting shaft and the transmission shaft form an angle, and the connecting shaft and the transmission shaft are located in the same horizontal plane.

[0019] The connecting shaft and the transmission shaft form a right angle, and the four sets of lifting table legs are arranged in a rectangular structure at the four positions of the tabletop.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] This utility model uses a power connection component to link the rotation of four transmission screws, thereby achieving synchronous and consistent lifting of the four height-adjustable table legs. By inputting power to any power connection component, any transmission screw, or any transmission component, the four height-adjustable table legs can move synchronously and simultaneously, which effectively facilitates the operation during height adjustment. Furthermore, the four-leg support structure has better overall stability, making it especially suitable for height-adjustable study desks equipped with high bookshelves or integrated desk lamps.

[0022] This utility model also has the following advantages:

[0023] The three-way power connection assembly, through the meshing of lifting transmission gear one, gear two, and gear one, realizes the connection and transmission of power in three directions: the axial direction of the transmission screw, the axial direction of the horizontal rotating shaft one, and the axial direction of the gear shaft. This effectively ensures the power connection and consistent lifting of the four legs of the four-legged lifting table. The rotation of any one of the transmission screw, horizontal rotating shaft one, and gear shaft can drive the other two to rotate synchronously, realizing the connection and transmission of three-way power.

[0024] The three-way power connection component can be standardized and adapted to the use of four-legged height-adjustable tables, and can help realize assembly line and automated production, effectively ensuring and improving production efficiency and product quality. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the connection between the lifting legs of the four-legged lifting table of this utility model (Example 1).

[0026] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0027] Figure 3 This is a schematic diagram of the connection between the lifting legs of the four-legged lifting table of this utility model (Embodiment 2).

[0028] Figure 4 for Figure 3 A magnified view of a section at point B in the middle.

[0029] Figure 5 This is a schematic diagram of the connection between the lifting legs of the four-legged lifting table of this utility model (Embodiment 3).

[0030] Figure 6 This is a structural diagram of the three-way power connection assembly of this utility model.

[0031] Figure 7 This is an exploded view of the three-way power connection assembly of this utility model.

[0032] Figure 8 This is a diagram showing the internal structure of the three-way power connection assembly of this utility model.

[0033] Figure 9 This is a structural diagram of the two-way power connection assembly of this utility model.

[0034] Figure 10 This is a diagram showing the internal structure of the two-way power connection assembly of this utility model.

[0035] The components include: 1. Three-way power connection assembly; 2. Transmission screw; 3. Tabletop; 4. Drive shaft; 5. Two-way power connection assembly; 6. Connecting rod; 7. Crossbar; 8. Table leg assembly; 9. Connecting shaft.

[0036] 11. Left housing; 12. Horizontal rotating shaft one; 13. Gear one; 14. Right housing; 15. Gear two; 16. Gear shaft; 17. Lifting transmission gear one;

[0037] 51. Lateral housing; 52. Horizontal rotating shaft II; 53. Gear III; 54. Lifting transmission gear II;

[0038] 80. Connecting rod; 81. Branch pipe; 82. Lifting table leg; 83. Support; 811. Adjustment hole. Detailed Implementation

[0039] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0040] like Figure 1As shown, a four-legged height-adjustable table in this embodiment includes four sets of height-adjustable table legs 82 arranged at four positions on the tabletop 3. Each set of height-adjustable table legs 82 is equipped with a power connection component, and each set of height-adjustable table legs 82 is equipped with a vertically arranged transmission screw 2 that drives it to rise or fall. The transmission screw 2 is poweredly connected to the power connection component of the corresponding height-adjustable table leg 82. At least three sets of adjacent power connection components are connected by a transmission component to drive the four transmission screws 2 to rotate simultaneously, and the four height-adjustable table legs 82 together drive the tabletop 3 to rise or fall.

[0041] In this embodiment, the rotation of the four transmission screws 2 is linked by the power connection component and the transmission component to form a linked whole, so as to realize the synchronous and consistent lifting of the four lifting table legs 82.

[0042] In this embodiment, power input to any power connection component, any transmission screw 2, or any transmission component can trigger a linkage action, driving the four lifting table legs 82 to move synchronously. This effectively facilitates the operation during lifting and adjustment, and the four-leg support structure has better overall stability.

[0043] In this embodiment, four sets of lifting table legs 82 are arranged at four positions on the desktop 3. The four positions can correspond to the four corners of the desktop 3, or to four interval positions outside the corners of the desktop 3. For example, when the bottom surface of the desktop 3 is not a quadrilateral structure, the desktop 3 can be supported and adjusted by the four sets of lifting table legs 82 at the four positions.

[0044] The power connection assembly includes at least two sets of adjacent three-way power connection assemblies 1. The two sets of three-way power connection assemblies 1 are connected by a connecting shaft 9 as a transmission element. The three-way power connection assembly 1 connected to the connecting shaft 9 is connected to another adjacent power connection assembly by a transmission shaft 4 as a transmission element. A single set of three-way power connection assembly 1 connects the rotational power in three axial directions: the axial rotation of the transmission screw 2, the axial rotation of the connecting shaft 9, and the axial rotation of the transmission shaft 4.

[0045] In this embodiment, the connecting shaft 9 and transmission shaft 4 connected to the two adjacent sets of three-way power connection components 1 are connected and transmitted through them, thereby ensuring the power connection of the four sets of power connection components, ensuring the synchronous rotation of the transmission screws 2 in the four sets of lifting table legs 82, and realizing the synchronous and consistent lifting of the four sets of lifting table legs 82.

[0046] The connecting shaft 9 and the transmission shaft 4 form an angle, and the connecting shaft 9 and the transmission shaft 4 are located in the same horizontal plane, so that the four sets of lifting table legs 82 can provide reliable and stable support for the tabletop 3.

[0047] In one embodiment, the connecting shaft 9 and the transmission shaft 4 form a right angle, and the four sets of lifting table legs 82 are arranged in a rectangular structure at four positions on the tabletop 3, for example, at the four corners of the tabletop 3.

[0048] In another embodiment, the connecting shaft 9 and the transmission shaft 4 form an angle other than a right angle, and the four sets of lifting table legs 82 are arranged in parallelogram or trapezoidal quadrilateral structures at four positions on the tabletop 3.

[0049] The power connection component other than the three-way power connection component 1 is the two-way power connection component 5. The two-way power connection component 5 is connected to the three-way power connection component 1 via the drive shaft 4. A single two-way power connection component 5 connects the axial rotation of the drive screw 2 and the axial rotation of the drive shaft 4 in two axial directions.

[0050] In one embodiment, such as Figure 1 As shown, the four sets of power connection components include two sets of three-way power connection components 1 and two sets of two-way power connection components 5. One direction of the two-way power connection component 5 is vertical, which is connected to the transmission screw 2. The other direction of the two-way power connection component 5 is in the same direction as the transmission shaft 4 and is connected to the adjacent three-way power connection component 1.

[0051] In another embodiment, such as Figure 3 As shown, all four sets of power connection components are three-way power connection components 1. One of the three-way power connection components 1 that is not connected to the connection shaft 9 is vertical and connected to the transmission screw 2, one is in the same direction as the transmission shaft 4 and connected to the adjacent three-way power connection component 1, and the other can be used as an optional external power input or left idle.

[0052] In another embodiment, the four sets of power connection components include three sets of three-way power connection components 1 and one set of two-way power connection components 5. Among the three-way power connection components 1 that are not connected to the connecting shaft 9, in addition to the two directions that are the same as the two-way power connection components 5, one direction is the vertical direction that is connected to the transmission screw 2, and the other direction is in the same direction as the transmission shaft 4 and is connected to the adjacent three-way power connection component 1. The other direction of the three-way power connection component 1 can be used as an optional external power input or left idle.

[0053] like Figure 6 , Figure 7 and Figure 8As shown, the structure of the three-way power connection assembly 1 is as follows: it includes an outer shell, a transmission screw 2 is rotatably mounted through the bottom surface of the outer shell, and a lifting transmission gear 17 is fitted at the top of the transmission screw 2 located inside the outer shell; a horizontal rotating shaft 12 is rotatably mounted between the opposing side walls of the outer shell, and a gear 13 is sleeved on the horizontal rotating shaft 12 located inside the outer shell; it also includes a gear shaft 16 rotatably mounted on the outer shell, which may be one or two coaxially arranged, and a gear 2 15 is sleeved at the end of the gear shaft 16 located inside the outer shell; the lifting transmission gear 17 and gear 2 15 respectively mesh with gear 13 to form power transmission in three directions: horizontal rotating shaft 12, gear shaft 16, and transmission screw 2.

[0054] In this embodiment, rotation of any one of the transmission screw 2, horizontal rotating shaft 12, and gear shaft 16 can drive the other two to rotate synchronously, realizing the transmission and connection of three-way power.

[0055] In this embodiment, one of the transmission screw 2, horizontal rotating shaft 12, and gear shaft 16 can be driven to rotate by power input from a motor or other means, or it can be manually rotated by tools or other means, thereby providing power input to the three-way power connection assembly 1.

[0056] In this embodiment, one gear shaft 16 or two coaxial gear shafts 16 can be arranged according to actual needs to perform axial rotational transmission.

[0057] In this embodiment, the outer shell is composed of a left shell 11 and a right shell 14 that are mounted facing each other. The two ends of the horizontal rotating shaft 12 are respectively rotatably mounted on the left shell 11 and the right shell 14. The gear shaft 16 is rotatably mounted on the side where the left shell 11 and the right shell 14 are connected. The transmission screw 2 is rotatably mounted on the bottom surface where the left shell 11 and the right shell 14 are connected.

[0058] In this embodiment, the combination of the left shell 11 and the right shell 14 helps to realize the modularization of the three-way power connection component 1, so that it can be set in a standardized manner, adapted to the use of a four-legged lifting table, and can help to realize assembly line and automated production, effectively ensuring and improving production efficiency and product quality.

[0059] The transmission screw 2, horizontal rotating shaft 12, and gear shaft 16 are respectively mounted on the housing via bearings, effectively ensuring the stability and reliability of power transmission of the three-way power connection assembly 1.

[0060] One end of the horizontal rotating shaft 12 and the outer end of a gear shaft 16 are connected to the connecting shaft 9 and the transmission shaft 4, thereby enabling three-way power transmission between the connecting shaft 9, the transmission shaft 4, and the transmission screw 2 by the three-way power connection assembly 1; the other end of the horizontal rotating shaft 12 and / or the outer end of another gear shaft 16 constitute the power input end, and an adjustment hole 811 for external tools to be inserted is provided corresponding to the power input end.

[0061] In this embodiment, an external tool can be used to input power to the horizontal rotating shaft 12 or the gear shaft 16 through the adjustment hole 811, thereby realizing the power input to the three-way power connection component 1, and thus realizing the lifting and lowering adjustment of the desktop panel 3 through power transmission.

[0062] In this embodiment, recessed hexagonal or other fitting holes can be provided at the end of the horizontal rotating shaft 12 and the end of the gear shaft 16 to facilitate the power connection with the connecting shaft 9 and the transmission shaft 4 in terms of structure, as well as the power input for fitting with external tools.

[0063] like Figure 9 and Figure 10 As shown, the structure of the two-way power connection assembly 5 is as follows: it includes two side housings 51 arranged and mounted facing each other, and a horizontal rotating shaft 52 is installed between the side housings 51. The horizontal rotating shaft 52 is coaxially arranged with the transmission shaft 4 and is poweredly connected at its end. A gear 53 is sleeved on the horizontal rotating shaft 52 located inside the side housing 51. A transmission screw 2 is rotatably mounted through the bottom surface of the side housing 51. A lifting transmission gear 54 is mounted at the top of the transmission screw 2. The lifting transmission gear 54 meshes with the gear 53.

[0064] In this embodiment, the meshing and assembly of gear 3 53 and lifting transmission gear 2 54 realizes the connection and transmission of power in two directions: the axial direction of the transmission screw 2 and the axial direction of the horizontal rotating shaft 2 52. The transmission and connection of power in both directions can be realized by rotating either the transmission screw 2 or the horizontal rotating shaft 2 52.

[0065] In this embodiment, one of the transmission screw 2 and the horizontal rotating shaft 52 can be driven to rotate by inputting power through a motor or the like, or it can be manually rotated by using tools or the like, thereby inputting power to the two-way power connection component 5.

[0066] One end of the horizontal rotating shaft 52 is connected to the drive shaft 4, thereby enabling two-way power transmission between the drive shaft 4 and the drive screw 2 via the two-way power connection assembly 5; the other end of the horizontal rotating shaft 52 constitutes a power input end, and an adjustment hole 811 for external tools to be inserted is provided corresponding to the power input end.

[0067] In this embodiment, an external tool can be used to input power to the horizontal rotating shaft 52 via the adjustment hole 811, thereby realizing the power input to the two-way power connection component 5.

[0068] In this embodiment, recessed hexagonal or other fitting holes can be provided at the end of the horizontal rotating shaft 52 to facilitate the power connection with the transmission shaft 4 in terms of structure, as well as the power input for fitting with external tools.

[0069] In this embodiment, the external tool used to input external power to the three-way power connection assembly 1 and the two-way power connection assembly 5 can be an independent locking tool or a tool mounted on the lifting table and corresponding to the adjustment hole 811, such as a hand-cranked drive structure.

[0070] In this embodiment, adjustment holes 811 can be opened for external power input to the three-way power connection component 1 and the two-way power connection component 5. The actual position and number of these holes can be set according to the actual design of the lifting table and corresponding to the adjustment position point. The external power input to individual power connection components can be selected by opening the adjustment holes 811.

[0071] The four sets of lifting table legs 82 are paired up in pairs. The top of each pair of lifting table legs 82 is connected to a support pipe 81. The top surfaces of the two support pipes 81 support the tabletop 3, thus enabling the tabletop 3 to be supported by the four lifting table legs 82, forming a four-legged lifting table. The power connection components, including the three-way power connection component 1, are all housed inside the support pipe 81, ensuring reliable housing and installation in the four-legged lifting table. The overall structure is compact and reasonable.

[0072] In one embodiment, the three-way power connection assembly 1 and the corresponding drive shaft 4, and the power connection assembly connected via the drive shaft 4 are housed in the same branch pipe 81, and the connection shaft 9 is connected between two branch pipes 81; for example, the drive shaft 4 and the power connection assemblies at both ends are located in the width direction of the desktop 3, and the connection shaft 9 is located in the length direction of the desktop 3.

[0073] Example 1:

[0074] exist Figure 1 In the described embodiment, the four sets of power connection components include two sets of three-way power connection components 1 and two sets of two-way power connection components 5. The power connection component connected to the end of the drive shaft 4 is the two-way power connection component 5. The two-way power connection component 5 involves power connection in two directions: vertical and in the same direction as the drive shaft 4. The three-way power connection component 1 involves power connection in three directions: vertical, in the same direction as the drive shaft 4, and in the same direction as the connecting shaft 9.

[0075] exist Figure 1In the embodiment shown, the source of the connecting power can be an automatic or manual input, such as a motor applied to the connecting shaft 9, one of the two drive shafts 4, one of the two three-way power connection components 1, or one of the two-way power connection components 5.

[0076] like Figure 2 As shown, an adjustment hole 811 can be opened at the end of the branch pipe 81. The adjustment hole 811 is directly opposite the end of the horizontal rotating shaft 52 in the two-way power connection assembly 5. An external tool is used to input power to the horizontal rotating shaft 52 through the adjustment hole 811 to drive it to rotate.

[0077] An adjustment hole 811 can also be opened at the other end of the branch pipe 81, and / or an adjustment hole 811 can be opened on the side of the branch pipe 81. The adjustment hole 811 is directly opposite the end of the gear shaft 16 and / or the end of the horizontal rotating shaft 12 in the three-way power connection assembly 1. An external tool is used to input power to the gear shaft 16 or the horizontal rotating shaft 12 through the adjustment hole 811 to drive it to rotate.

[0078] Example 2:

[0079] The difference from Example 1 is that, as Figure 3 As shown, all four sets of power connection components are three-way power connection components 1, that is, the power connection components connected to both ends of the drive shaft 4 are all three-way power connection components 1; each three-way power connection component 1 involves power connection in three directions: vertical, in the same direction as the drive shaft 4, and in the same direction or parallel to the connecting shaft 9.

[0080] exist Figure 3 In the embodiment shown, the source of the connecting power can be an automatic input or a manual input, such as a motor applied to the connecting shaft 9, one of the two drive shafts 4, or one of the four three-way power connecting components 1.

[0081] like Figure 4 As shown, an adjustment hole 811 can be opened on the side wall of the branch pipe 81. The adjustment hole 811 is directly opposite the end of the horizontal rotating shaft 12 in the corresponding three-way power connection assembly 1. An external tool is used to input power to the horizontal rotating shaft 12 through the adjustment hole 811 to drive it to rotate.

[0082] Of course, an adjustment hole 811 can also be opened at the end of the branch pipe 81. The adjustment hole 811 is directly opposite the end of the gear shaft 16 in the three-way power connection assembly 1, and the external tool can input power to the gear shaft 16 through the adjustment hole 811.

[0083] Example 3:

[0084] exist Figure 5In the embodiment shown, the two three-way power connection components 1 and the connecting shaft 9 between them are housed in the same branch pipe 81, that is, located in the width direction of the desktop 3; the two power connection components are housed in another branch pipe 81, that is, the two power connection components are located in the same width direction of the desktop 3; the two drive shafts 4 are respectively connected between the two branch pipes 81, that is, the two drive shafts 4 are located in the length direction of the desktop 3.

[0085] In this embodiment, the power connection component other than the two three-way power connection components 1 can also be a two-way power connection component 5 or a three-way power connection component 1, as described in Embodiment 1 and Embodiment 2.

[0086] The branch pipe 81 and the two adjustable table legs 82 together constitute the table leg assembly 8; in actual use, the two sets of table leg assemblies 8 are arranged on the left and right sides of the tabletop 3.

[0087] In one embodiment, such as Figure 1 As shown, the bottom ends of the two lifting table legs 82 in the table leg assembly 8 are jointly equipped with supports 83 to help lift and ensure the structural stability and reliability of the four-legged lifting table.

[0088] In one embodiment, such as Figure 5 As shown, a connecting rod 80 can be installed between the two supports 83 to help improve the structural stability of the four-legged height-adjustable table.

[0089] In one embodiment, such as Figure 1 or Figure 3 or Figure 5 As shown, a crossbar 7 is installed between the two branch pipes 81, which improves the structural connection between the two sets of table leg assemblies 8.

[0090] In one embodiment, such as Figure 1 or Figure 3 or Figure 5 As shown, a connecting rod 6 is installed between the two branch pipes 81 table leg assemblies 8 to help improve the structural connection between the two sets of table leg assemblies 8.

[0091] In this utility model, the lifting table leg 82 includes an inner tube and an outer tube that slide and nest together. The rotation of the transmission screw 2 drives the inner tube and the outer tube to move relative to each other axially in height.

[0092] In this embodiment, the lifting table leg 82, which is composed of an inner tube and an outer tube assembly, can adopt a conventional table leg lifting structure, such as the existing published patent with the application date of July 11, 2023 and the authorization announcement number CN 220384553 U, which discloses a height adjustment mechanism for a study table and a study table, and discloses a height adjustment mechanism for the table leg.

[0093] In one embodiment, the top end of the inner tube of the lifting table leg 82 is connected to the upper support tube 81, and the bottom end of the outer tube is supported on the bottom surface or connected to the lower support 83. The inner tube and the outer tube are slidably fitted together, and the axial direction of the inner tube is synchronized with the limit of the transmission screw 2. The transmission screw 2 is screwed to the outer tube. The rotation of the transmission screw 2 causes the transmission screw 2 to move axially, thereby driving the inner tube to move axially relative to the outer tube, so as to realize the lifting adjustment.

[0094] In another embodiment, the top end of the outer tube of the lifting table leg 82 is connected to the upper support tube 81, and the bottom end of the inner tube is supported on the bottom surface or connected to the lower support 83. The inner tube and the outer tube are slidably fitted together, and the axial direction of the outer tube is synchronized with the limit of the transmission screw 2. The transmission screw 2 is screwed and screwed to the inner tube. The rotation of the transmission screw 2 causes the transmission screw 2 to move axially, thereby driving the outer tube to move axially relative to the inner tube, so as to realize the lifting adjustment.

[0095] This invention achieves synchronous and consistent lifting of the four adjustable table legs, and the four-leg support structure has better overall stability, making it especially suitable for adjustable study desks equipped with tall bookshelves or integrated desk lamps.

[0096] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0097] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A four-legged height-adjustable table, characterized in that: The table includes four sets of lifting table legs (82) located at four positions on the tabletop (3). Each set of lifting table legs (82) is equipped with a power connection component. Each set of lifting table legs (82) is equipped with a vertically arranged transmission screw (2) that drives it to rise or fall. The transmission screw (2) is powered to the power connection component of the corresponding lifting table leg (82). At least three sets of adjacent power connection components are connected by a transmission component to drive the four transmission screws (2) to rotate simultaneously. The four lifting table legs (82) together drive the tabletop (3) to rise or fall.

2. The four-legged height-adjustable table as described in claim 1, characterized in that: The power connection assembly includes at least two sets of adjacent three-way power connection assemblies (1). The two sets of three-way power connection assemblies (1) are connected by a connecting shaft (9) as a transmission element. The three-way power connection assembly (1) connected to the connecting shaft (9) is connected to another adjacent power connection assembly by a transmission shaft (4) as a transmission element. A single set of three-way power connection assembly (1) connects the axial rotation of the transmission screw (2), the axial rotation of the connecting shaft (9), and the axial rotation of the transmission shaft (4) in three axial directions.

3. A four-legged height-adjustable table as described in claim 2, characterized in that: The power connection component other than the three-way power connection component (1) is a two-way power connection component (5). The two-way power connection component (5) is connected to the three-way power connection component (1) via the transmission shaft (4). A single two-way power connection component (5) connects the axial rotation of the transmission screw (2) and the axial rotation of the transmission shaft (4) in two axial directions.

4. A four-legged height-adjustable table as described in claim 2 or 3, characterized in that: The structure of the three-way power connection assembly (1) is as follows: it includes an outer shell, a transmission screw (2) is rotatably mounted through the bottom surface of the outer shell, and a lifting transmission gear (17) is fitted at the top of the transmission screw (2) located inside the outer shell; a horizontal rotating shaft (12) is rotatably mounted between the opposing side walls of the outer shell, and a gear (13) is sleeved on the horizontal rotating shaft (12) located inside the outer shell; it also includes a gear shaft (16) rotatably mounted on the outer shell, which is one or two coaxially arranged, and a gear (15) is sleeved at the end of the gear shaft (16) located inside the outer shell; the lifting transmission gear (17) and gear (15) mesh with gear (13) to form power transmission in three directions: horizontal rotating shaft (12), gear shaft (16), and transmission screw (2).

5. A four-legged height-adjustable table as described in claim 4, characterized in that: One end of the horizontal rotating shaft (12) and the outer end of a gear shaft (16) are connected to the connecting shaft (9) and the transmission shaft (4). The other end of the horizontal rotating shaft (12) and / or the outer end of another gear shaft (16) constitute the power input end. An adjustment hole (811) for external tools to be inserted is provided corresponding to the power input end.

6. A four-legged height-adjustable table as described in claim 3, characterized in that: The structure of the two-way power connection assembly (5) is as follows: it includes two side housings (51) arranged and mounted facing each other, and a horizontal rotating shaft (52) is installed between the two side housings (51). The horizontal rotating shaft (52) is coaxially arranged with the transmission shaft (4) and is poweredly connected at the end. A gear (53) is sleeved on the horizontal rotating shaft (52) located inside the side housing (51). A transmission screw (2) is rotatably mounted through the bottom surface of the side housing (51). A lifting transmission gear (54) is mounted on the top of the transmission screw (2). The lifting transmission gear (54) meshes with the gear (53).

7. A four-legged height-adjustable table as described in claim 2, characterized in that: The four sets of lifting table legs (82) are paired up in pairs. The top of the paired lifting table legs (82) is equipped with a support pipe (81). The top surface of the two support pipes (81) supports the tabletop (3). The three-way power connection assembly (1) and the corresponding drive shaft (4), and the power connection assembly connected via the drive shaft (4) are housed in the same branch pipe (81), and the connection shaft (9) is connected between two branch pipes (81); or, Two three-way power connection components (1) and their connecting shaft (9) are housed in the same branch pipe (81), two power connection components are housed in another branch pipe (81), and two drive shafts (4) are respectively connected between the two branch pipes (81).

8. A four-legged height-adjustable table as described in claim 7, characterized in that: The branch pipe (81) and the two lifting table legs (82) together constitute a table leg assembly (8); the bottom ends of the two lifting table legs (82) in the table leg assembly (8) are jointly equipped with a support (83), and / or, a crossbar (7) is jointly installed between the two branch pipes (81), and / or, a connecting rod (6) is jointly installed between the table leg assemblies (8) of the two branch pipes (81).

9. A four-legged height-adjustable table as described in claim 2, characterized in that: The connecting shaft (9) and the transmission shaft (4) form an angle, and the connecting shaft (9) and the transmission shaft (4) are located in the same horizontal plane.

10. A four-legged height-adjustable table as described in claim 9, characterized in that: The connecting shaft (9) and the transmission shaft (4) form a right angle, and the four sets of lifting table legs (82) are arranged in a rectangular structure at the four positions of the tabletop (3).

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