A lifting worktable

Abstract

The application discloses a lifting work table, which comprises a work platform, a base, a power element and a lifting assembly. The lifting assembly comprises at least one set of lifting supports, each set of the lifting supports comprising two lifting arms, i.e., a first lifting arm and a second lifting arm. The first lifting arm comprises a first supporting rod, a second supporting rod and a first pull rod, the first supporting rod and the second supporting rod are crossed to form an X shape and are not connected with each other. The second lifting arm comprises a third supporting rod, a fourth supporting rod and a second pull rod, the third supporting rod and the fourth supporting rod are crossed to form an X shape and are not connected with each other. The first supporting rod, the third supporting rod, the first pull rod and the second pull rod form a parallelogram rotating structure. When the lifting work table is lifted, the supporting gravity center of the lifting arm and the gravity center of the load of the work platform are kept unchanged, the lifting work table is prevented from being turned on one side, the supporting stability is good, and the lifting stroke is large.

Description

Technical Field

[0001] This application relates to the field of computer-supported equipment technology, specifically a height-adjustable work desk. Background Technology

[0002] With the continuous development of society, flat panel monitors and tablet computers are becoming increasingly common in ordinary households, leading to the development of corresponding stands. Desktop workbenches used to support tablet computers, also known as height-adjustable work desks, height-adjustable worktables, or desktop computer stands, are typically placed on a desktop or tabletop and can be adjusted in height to meet the needs of users who prefer a healthy work style, such as standing or alternating between standing and sitting.

[0003] The related technology of height-adjustable desktop workbenches generally includes a base, a work platform, and an X-shaped lifting arm positioned between the base and the work platform. The lifting arm includes two X-shaped support rods hinged at the center: a first support rod and a second support rod. The upper end of the first support rod is rotatably connected to the work platform, and the lower end of the first support rod is slidably fitted onto the base. The lower end of the second support rod is rotatably connected to the base, and the upper end of the second support rod is slidably fitted onto the work platform. The workbench also includes a power element, typically a gas spring. One end of the gas spring is connected to the work platform, and the other end is connected to the lifting arm. The gas spring provides lift for the work platform and counteracts or partially counteracts the weight of the work platform. The height of the workbench is adjustable by controlling the gas spring's movement via a control cable and a lever connected to the work platform.

[0004] During actual use, the inventors discovered the following defects in the aforementioned lifting worktables: The first and second supports of the X-shaped lifting arm of the lifting worktable are hinged together by a hinge pin. When the work platform rises or falls relative to the base, the lower end of the first support and the upper end of the second support slide to one side of the lifting worktable simultaneously. This causes the center of gravity of the lifting arm to deviate from the center of gravity of the work platform load, easily leading to tipping over and posing a safety hazard. Furthermore, the lifting stroke of the lifting worktables in this technology is generally small and cannot meet the needs of users. Summary of the Invention

[0005] The technical problem to be solved by this application is to overcome the defects of the above-mentioned related technologies and provide a desktop lifting worktable in which the center of gravity of the lifting arm and the center of gravity of the work platform load remain relatively unchanged during lifting, thus avoiding tipping over, providing good support stability, and having a large lifting stroke.

[0006] The technical solution of this application is to provide a desktop height-adjustable workbench with the following structure: it includes...

[0007] Work platform;

[0008] A base that can be placed on an existing desktop or tabletop; and

[0009] A lifting assembly connecting the work platform and the base for adjusting the height of the work platform relative to the base, the lifting assembly including at least one set of lifting brackets, each set of lifting brackets including two lifting arms: a first lifting arm and a second lifting arm; wherein...

[0010] The first lifting arm includes two support rods: a first support rod and a second support rod. The first support rod and the second support rod intersect in an X-shape and are not connected to each other. The lower ends of the first support rod and the second support rod are rotatably connected to the base, and the upper ends of the first support rod and the second support rod are respectively formed with a first rotation connection point and a second rotation connection point. The first lifting arm also includes a first pull rod. One end of the first pull rod is rotatably connected to the second rotation connection point, and the other end of the first pull rod is rotatably connected to the first support rod.

[0011] The second lifting arm includes two support rods: a third support rod and a fourth support rod. The third and fourth support rods intersect in an X-shape and are not connected to each other. The upper ends of the third and fourth support rods are rotatably connected to the working platform, and the lower ends of the third and fourth support rods are rotatably connected to a second rotation connection point and a first rotation connection point, respectively. The second lifting arm also includes a second tie rod. One end of the second tie rod is rotatably connected to the first rotation connection point, and the other end of the second tie rod is rotatably connected to the third support rod. The first support rod, the third support rod, the first tie rod, and the second tie rod form a parallelogram rotation structure.

[0012] The lifting worktable also includes a power element connected between the work platform and the base to provide lift for the work platform to rise.

[0013] In some embodiments, the lifting brackets are in two groups and distributed along the length of the working platform, and at least one connecting rod connects the two groups of lifting brackets.

[0014] In some embodiments, the lower ends of the first support rod and the second support rod are rotatably connected to two first hinge points connected to the base; the upper ends of the third support rod and the fourth support rod are rotatably connected to two second hinge points connected to the working platform; the distance between the two first hinge points is equal to the distance between the two second hinge points, and the two first hinge points are respectively opposite to the two second hinge points in the vertical direction.

[0015] In some embodiments, the horizontal projections of the first and second pull rods along the vertical direction are located between the horizontal projections of the first and second support rods along the vertical direction, or the horizontal projections of the first and second pull rods along the vertical direction are located between the horizontal projections of the third and fourth support rods along the vertical direction.

[0016] In some embodiments, the power element is a gas spring, one end of which is rotatably connected to the work platform or base, and the other end is rotatably connected to the lifting assembly; or one end of the power element is connected to the work platform and the other end is connected to the base; or one end of the power element is rotatably connected to the first lifting arm and the other end is rotatably connected to the second lifting arm; or both ends of the power element are rotatably connected to the two support rods of the first lifting arm; or both ends of the power element are rotatably connected to the two support rods of the second lifting arm.

[0017] In some embodiments, the fourth support rod is connected to a downwardly extending swing arm at one end near the working platform, one end of the power element is rotatably connected to the working platform, and the other end is rotatably connected to the lower end of the swing arm.

[0018] In some embodiments, the desktop lifting worktable further includes a locking mechanism, which includes a wrench connected to the work platform and connected to a control switch of the power element via a brake cable.

[0019] In some embodiments, a keyboard tray is connected to the side of the work platform closest to the user, and when the work platform is in its lowest position, the bottom plane of the keyboard tray is at the same horizontal level as the bottom plane of the base.

[0020] Another technical solution of this application is to provide a desktop height-adjustable workbench with the following structure: it includes a work platform;

[0021] A base that can be placed on an existing desktop or tabletop; and

[0022] A lifting assembly connecting the work platform and the base for adjusting the height of the work platform relative to the base, the lifting assembly including at least one set of lifting brackets, each set of lifting brackets including two lifting arms: a first lifting arm and a second lifting arm; wherein...

[0023] The first lifting arm includes two support rods: a first support rod and a second support rod. The first support rod and the second support rod intersect in an X-shape and are not connected to each other. The lower ends of the first support rod and the second support rod are rotatably connected to the base, and the upper ends of the first support rod and the second support rod are respectively formed with a first rotation connection point and a second rotation connection point. The first lifting arm also includes a first pull rod. One end of the first pull rod is rotatably connected to the first rotation connection point, and the other end of the first pull rod is rotatably connected to the second support rod.

[0024] The second lifting arm includes two support rods: a third support rod and a fourth support rod. The third and fourth support rods intersect in an X-shape and are not connected to each other. The upper ends of the third and fourth support rods are rotatably connected to the working platform, and the lower ends of the third and fourth support rods are rotatably connected to a second rotation connection point and a first rotation connection point, respectively. The second lifting arm also includes a second tie rod. One end of the second tie rod is rotatably connected to the second rotation connection point, and the other end of the second tie rod is rotatably connected to the fourth support rod. The second support rod, the fourth support rod, the first tie rod, and the second tie rod form a parallelogram rotation structure.

[0025] The lifting worktable also includes a power element connected between the work platform and the base to provide lift for the work platform to rise.

[0026] In summary, the lifting worktable of this application has the following advantages compared with related technologies: the two support rods of each lifting arm of the desktop lifting worktable are arranged in an X-shape and are not connected to each other. That is, the two support rods of each lifting arm are set independently and are not connected to each other and do not interfere with each other. Compared with the lifting arm in the related technology where the two support rods that are crossed in an X-shape are hinged in the middle, this avoids the assembly between the two support rods, simplifies the assembly process, and its installation structure is simple.

[0027] In addition, the lower ends of the first and second support rods are rotatably connected to the base, and the upper ends of the third and fourth support rods are rotatably connected to the work platform. The first, third, first, and second pull rods form a parallelogram rotating structure, or the second, fourth, first, and second pull rods form a parallelogram rotating structure. This ensures that during the lifting process, the center of gravity of the lifting assembly remains relatively constant with the center of gravity of the work platform load, or that the center of gravity of the lifting assembly always remains on the same vertical line as the center of gravity of the work platform load, or that the center of gravity of the lifting assembly coincides with the center of gravity of the work platform load and does not shift relative to it. Therefore, this desktop lifting worktable effectively avoids the defect of the center of gravity of the lifting assembly gradually deviating from the center of gravity of the work platform load during lifting, resulting in good support stability, preventing tipping, and high safety.

[0028] Furthermore, each lifting bracket of this desktop lifting workbench consists of two lifting arms distributed along the height direction of the desktop lifting workbench. Therefore, the lifting stroke of this desktop lifting workbench is relatively large, meeting the needs of different users. Attached Figure Description

[0029] Figure 1 This is a structural schematic diagram of a height-adjustable workbench according to some embodiments of this application.

[0030] Figure 2 This is another schematic diagram of a height-adjustable workbench according to some embodiments of this application.

[0031] Figure 3 This is a side view of a height-adjustable workbench according to some embodiments of this application.

[0032] Figure 4 This is a structural schematic diagram of a lifting support for a lifting worktable according to some embodiments of this application.

[0033] Figure 5 This is a schematic diagram of a height-adjustable worktable in a folded state according to some embodiments of this application.

[0034] Figure 6 This is a schematic diagram from another angle showing the work platform of a height-adjustable workbench in a folded state, according to some embodiments of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Working platform; 100. Second hinge point; 2. Base; 200. First hinge point; 3. Lifting assembly; 300. First lifting arm; 301. Second lifting arm; 302. First support rod; 303. Second support rod; 304. First pull rod; 305. First rotating connection point; 306. Second rotating connection point; 307. Third support rod; 308. Fourth support rod; 309. Second pull rod; 4. Power element; 400. Swing arm; 5. Wrench; 6. Keyboard tray; 7. Connecting rod. Detailed Implementation

[0037] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0038] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0039] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0041] See Figures 1-6 As shown in the figure, this application discloses a height-adjustable workbench, also known as a desktop worktable or desktop lifting table. Its structure includes a work platform 1, a base 2, a power element 4, and a lifting assembly 3 connecting the work platform 1 and the base 2 for adjusting the height of the work platform 1 relative to the base 2. The power element 4 is connected between the work platform 1 and the base 2 to provide the lifting force for the work platform 1 to rise and to offset or partially offset the load of the work platform 1. The work platform 1 is also known as a tabletop, a storage panel, or an upper platform, and the base 2 is also known as a base frame or a lower platform. The base 2 is placed on a desktop or tabletop in the prior art. In this embodiment, the base 2 has an I-shaped structure, that is, it includes two parallel bottom rods connected by a vertical rod. The I-shaped structure connected to the bottom of the work platform 1 is the same as that of the base 2.

[0042] In some embodiments, such as Figure 1 , Figure 2 and Figure 3As shown, the lifting assembly 3 connecting the work platform 1 and the base 2 for adjusting the height of the work platform 1 relative to the base 2 includes at least one set of lifting brackets. Each set of lifting brackets includes two lifting arms: a first lifting arm 300 and a second lifting arm 301. The first lifting arm 300 and the second lifting arm 301 are distributed from bottom to top along the height direction of the lifting worktable. Specifically, in this embodiment, the first lifting arm 300 includes two support rods: a first support rod 302 and a second support rod 303. The first support rod 302 and the second support rod 303 intersect in an X-shape and are not connected to each other. The lower ends of the first support rod 302 and the second support rod 303 are rotatably connected to the base 2, and the upper ends of the first support rod 302 and the second support rod 303 are respectively formed with a first rotation connection point 305 and a second rotation connection point 306. The first lifting arm 300 also includes a first pull rod 304, one end of which is rotatably connected to a second support rod 306. Point 306 is rotatably connected, and the other end of the first pull rod 304 is rotatably connected to the first support rod 302. Similarly, the second lifting arm 301 includes two support rods: a third support rod 307 and a fourth support rod 308. The third support rod 307 and the fourth support rod 308 intersect in an X-shape and are not connected to each other. The upper ends of the third support rod 307 and the fourth support rod 308 are rotatably connected to the working platform 1, and the lower ends of the third support rod 307 and the fourth support rod 308 are rotatably connected to the second rotation connection point 306 and the first rotation connection point 305, respectively. The second lifting arm 301 also includes a second pull rod 309. One end of the second pull rod 309 is rotatably connected to the first rotation connection point 305, and the other end of the second pull rod 309 is rotatably connected to the third support rod 307. The first support rod 302, the third support rod 307, the first pull rod 304, and the second pull rod 309 form a parallelogram rotation structure.

[0043] In the above embodiments, the first support rod 302 and the third support rod 307 are arranged in parallel, the second support rod 303 and the fourth support rod 308 are arranged in parallel, and the first pull rod 304 and the second pull rod 309 are arranged in parallel.

[0044] In the above embodiment, each lifting bracket of the desktop lifting workbench consists of two lifting arms distributed along the height direction of the desktop lifting workbench. Therefore, the lifting stroke of the desktop lifting workbench is relatively large, meeting the needs of different users. Furthermore, the two support rods of each lifting arm of the desktop lifting workbench are arranged in an X-shape and are not connected to each other. That is, the two support rods of each lifting arm are independently set up and do not interfere with each other. Compared with related technologies where the two X-shaped support rods are hinged in the middle, this avoids the assembly of the two support rods, simplifies the assembly process, and results in a simple installation structure.

[0045] Furthermore, the lower ends of the first support rod 302 and the second support rod 303 are rotatably connected to the base 2, and the upper ends of the third support rod 307 and the fourth support rod 308 are rotatably connected to the work platform 1. The first support rod 302, the third support rod 307, the first pull rod 304, and the second pull rod 309 form a parallelogram rotating structure, or the second support rod 303, the fourth support rod 308, the first pull rod 304, and the second pull rod 309 form a parallelogram rotating structure. This ensures that during the lifting process, the center of gravity of the lifting assembly 3 remains relatively constant with the center of gravity of the load on the work platform 1, or the center of gravity of the lifting assembly 3 always remains on the same vertical line as the center of gravity of the load on the work platform 1, or the center of gravity of the lifting assembly 3 coincides with the center of gravity of the load on the work platform 1 without relative offset. Therefore, during the lifting process, the lifting worktable effectively avoids the defect of the center of gravity of the lifting assembly 3 gradually deviating from the center of gravity of the load on the work platform 1, resulting in good support stability, preventing tipping, and high safety.

[0046] It is easy to understand that in the above embodiments, the first rotating connection point 305 and the second rotating connection point 306 refer to the fact that the upper ends of the first support rod 302 and the second support rod 303 are respectively connected to a rotating shaft or a hinge pin. The rotating shaft or hinge pin forms the first rotating connection point 305 and the second rotating connection point 306, which are used to allow the lower end of the second lifting arm 301 to be rotatably connected.

[0047] Taking the first lifting arm 300 as an example, when the working platform 1 is raised and lowered relative to the base 2, the lower ends of the first support rod 302 and the second support rod 303 rotate synchronously at a certain angle, causing the upper ends of the first support rod 302 and the second support rod 303 to rise and fall. Under the support and linkage of the first pull rod 304, the lifting height of the upper ends of the first support rod 302 and the upper ends of the second support rod 303 remains synchronous. Similarly, the second lifting arm 301 is the same. Under the support and linkage of the second pull rod 309, the lifting height of the lower ends of the third support rod 307 and the lower ends of the fourth support rod 308 remains synchronous. In addition, the first support rod 302, the third support rod 307, the first pull rod 304 and the second pull rod 309 form a parallelogram rotating structure, thus maintaining the synchronicity of the lifting of the first lifting arm 300 and the second lifting arm 301. Furthermore, in the unfolded state of the working platform 1, the mutual support of the first lifting arm 300 and the second lifting arm 301, plus the support of the power element 4, enables the working platform 1 to maintain a stable hovering state, that is, the unfolded state.

[0048] In this embodiment, as Figure 1 and Figure 2As shown, to provide stable support for the work platform 1, there are two sets of lifting supports distributed along the length of the work platform 1, and at least one connecting rod 7 is connected between the two sets of lifting supports. The connecting rod 7 can further enable the two sets of lifting supports to maintain synchronous lifting action, thereby improving the lifting stability of the lifting worktable. Specifically, in this embodiment, two connecting rods 7 are provided. The two ends of the first connecting rod 7 are respectively connected to the second support rod 303 of the two sets of lifting arms, and the two ends of the other connecting rod 7 are respectively connected to the fourth support rod 308 of the two sets of lifting arms; or the two ends of the first connecting rod 7 are respectively connected to the first support rod 302 of the two sets of lifting arms, and the two ends of the other connecting rod 7 are respectively connected to the third support rod 307 of the two sets of lifting arms.

[0049] In this embodiment, as Figure 1 and Figure 3 As shown, the lower ends of the first support rod 302 and the second support rod 303 are rotatably connected to two first hinge points 200 connected to the base 2; the upper ends of the third support rod 307 and the fourth support rod 308 are rotatably connected to two second hinge points 100 connected to the work platform 1; the distance between the two first hinge points 200 is equal to the distance between the two second hinge points 100, and the two first hinge points 200 are vertically opposite to the two second hinge points 100 respectively. This arrangement further improves the stability of the lifting and lowering of the work platform 1, and the work platform 1 remains horizontal throughout the lifting and lowering process. In this embodiment, the two first hinge points 200 and the two second hinge points 100 are both pivots or hinge pins connected to the base 2 and the work platform 1. During the lifting and lowering process of the work platform 1, the horizontal projection of the two first hinge points 200 along the vertical direction remains unchanged relative to the horizontal projection of the two second hinge points 100 along the vertical direction, that is, the lifting and lowering process of the work platform 1 will not deviate from the horizontal direction relative to the base 2.

[0050] To make the structure of each lifting bracket of the lifting assembly 3 more compact and to ensure that the various supports or tie rods in each lifting bracket do not interfere with each other during rotation, such as Figure 4 As shown, the horizontal projections of the first tie rod 304 and the second tie rod 309 along the vertical direction lie between the horizontal projections of the first support rod 302 and the second support rod 303 along the vertical direction, or the horizontal projections of the first tie rod 304 and the second tie rod 309 along the vertical direction lie between the horizontal projections of the third support rod 307 and the fourth support rod 308 along the vertical direction. That is, the connection position of the first tie rod 304 is between the intersecting first support rod 302 and the second support rod 303, and the connection position of the second tie rod 309 is between the intersecting third support rod 307 and the fourth support rod 308, with the first tie rod 304 and the second tie rod 309 on the same plane.

[0051] In some embodiments, the power element 4 is a gas spring capable of outputting a constant thrust. The power element 4 outputs a linear thrust, the direction of which coincides with the axial direction of the power element 4. The power element 4 can be connected in various ways, such as one end of the power element 4 being rotatably connected to the working platform 1 or the base 2, and the other end being rotatably connected to the lifting assembly 3; or one end of the power element 4 being connected to the working platform 1 and the other end to the base 2; or one end of the power element 4 being rotatably connected to the first lifting arm 300 and the other end being rotatably connected to the second lifting arm 301; or both ends of the power element 4 being rotatably connected to the two support rods of the first lifting arm 300; or both ends of the power element 4 being rotatably connected to the two support rods of the second lifting arm 301.

[0052] In other embodiments, the power element 4 may also be an electric actuator, a linear motor, a hydraulic rod, or other linear drive mechanism.

[0053] In this embodiment, specifically, the power element 4 is a controllable gas spring. A downwardly extending swing arm 400 is connected to one end of the fourth support rod 308 near the work platform 1. One end of the power element 4 is rotatably connected to the work platform 1, and the other end is rotatably connected to the lower end of the swing arm 400. This ensures that the power element 4 is always in an inclined state, effectively providing lift for the work platform 1. The power element 4 has a control switch or valve switch. To allow the work platform 1 to be locked to different heights within its travel range, the lifting worktable also includes a locking mechanism. The locking mechanism includes a wrench 5 connected to the work platform 1, which is connected to the control switch of the power element 4 via a brake cable. Pulling the wrench 5 opens the control switch of the power element 4, causing the power element 4 to unfold and drive the lifting assembly 3 to rotate, thus raising the work platform 1 to adjust its height.

[0054] In some embodiments, such as Figure 1 , Figure 3 and Figure 5 As shown, to facilitate keyboard placement, a keyboard tray 6 is connected to the side of the work platform 1 closest to the user. When the work platform 1 is in its lowest position, the bottom plane of the keyboard tray 6 is at the same level as the bottom plane of the base 2. This ensures that when the work platform 1 is in its lowest position, the bottom of the keyboard tray 6 is in contact with the ground or tabletop, thus improving the stability of the height-adjustable desktop worktable.

[0055] Another embodiment of this application discloses a height-adjustable workbench, the structure of which includes a work platform 1; a base 2 placed on an existing desktop or tabletop; and a lifting assembly 3 connecting the work platform 1 and the base 2 for adjusting the height of the work platform 1 relative to the base 2. The lifting assembly 3 includes at least one set of lifting brackets, each set of lifting brackets including two lifting arms: a first lifting arm 300 and a second lifting arm 301; wherein, the first lifting arm 300 includes two support rods: a first support rod 302 and a second support rod 303, the first support rod 302 and the second support rod 303 intersecting in an X shape and not connected to each other, the lower ends of the first support rod 302 and the second support rod 303 are respectively rotatably connected to the base 2, and the upper ends of the first support rod 302 and the second support rod 303 are respectively formed with a first rotating connection point 305 and a second rotating connection point 306; the first lifting arm 300 also includes a first pull rod 304, one end of the first pull rod 304 is rotatably connected to the first rotating connection point 305, and the other end of the first pull rod 304 is rotatably connected to the first rotating connection point 305. One end is rotatably connected to the second support rod 303; the second lifting arm 301 includes two support rods: a third support rod 307 and a fourth support rod 308, which cross in an X-shape and are not connected to each other. The upper ends of the third support rod 307 and the fourth support rod 308 are rotatably connected to the work platform 1, and the lower ends of the third support rod 307 and the fourth support rod 308 are rotatably connected to the second rotation connection point 306 and the first rotation connection point 305, respectively; the second lifting arm 301 also includes a second pull rod 309, one end of which is rotatably connected to the second rotation connection point 306, and the other end of which is rotatably connected to the fourth support rod 308; and the second support rod 303, the fourth support rod 308, the first pull rod 304 and the second pull rod 309 form a parallelogram rotation structure; the lifting worktable also includes a power element 4, which is connected between the work platform 1 and the base 2 to provide lifting force for the work platform 1 to rise. In this embodiment, the difference from the previous embodiment is that the connection position of the first pull rod 304 and the second pull rod 309 is different, while the other structures are the same as in the previous embodiment.

[0056] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0057] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A height-adjustable workbench, characterized in that: It includes Work platform; A base that is placed on an existing desktop or tabletop; as well as A lifting assembly connecting the work platform and the base for adjusting the height of the work platform relative to the base, the lifting assembly including at least one set of lifting brackets, each set of lifting brackets including two lifting arms: a first lifting arm and a second lifting arm; wherein... The first lifting arm includes two support rods: a first support rod and a second support rod. The first support rod and the second support rod intersect in an X-shape and are not connected to each other. The lower ends of the first support rod and the second support rod are rotatably connected to the base, and the upper ends of the first support rod and the second support rod are respectively formed with a first rotation connection point and a second rotation connection point. The first lifting arm also includes a first pull rod. One end of the first pull rod is rotatably connected to the second rotation connection point, and the other end of the first pull rod is rotatably connected to the first support rod. The second lifting arm includes two support rods: a third support rod and a fourth support rod. The third and fourth support rods intersect in an X-shape and are not connected to each other. The upper ends of the third and fourth support rods are rotatably connected to the working platform, and the lower ends of the third and fourth support rods are rotatably connected to a second rotation connection point and a first rotation connection point, respectively. The second lifting arm also includes a second tie rod. One end of the second tie rod is rotatably connected to the first rotation connection point, and the other end of the second tie rod is rotatably connected to the third support rod. The first support rod, the third support rod, the first tie rod, and the second tie rod form a parallelogram rotation structure. The lifting worktable also includes a power element connected between the work platform and the base to provide lift for the work platform to rise.

2. The height-adjustable workbench according to claim 1, characterized in that: The lifting supports are in two groups and are distributed along the length of the working platform, and at least one connecting rod connects the two groups of lifting supports.

3. The height-adjustable workbench according to claim 1, characterized in that: The lower ends of the first and second support rods are rotatably connected to two first hinge points on the base; the upper ends of the third and fourth support rods are rotatably connected to two second hinge points on the working platform; the distance between the two first hinge points is equal to the distance between the two second hinge points, and the two first hinge points are respectively opposite to the two second hinge points in the vertical direction.

4. The height-adjustable workbench according to claim 1, characterized in that: The horizontal projections of the first and second tie rods along the vertical direction are located between the horizontal projections of the first and second support rods along the vertical direction, or the horizontal projections of the first and second tie rods along the vertical direction are located between the horizontal projections of the third and fourth support rods along the vertical direction.

5. The height-adjustable workbench according to claim 1, characterized in that: The power element is a gas spring, one end of which is rotatably connected to the working platform or base, and the other end is rotatably connected to the lifting assembly. Alternatively, one end of the power element may be connected to the working platform and the other end may be connected to the base; Alternatively, one end of the power element may be rotatably connected to the first lifting arm and the other end may be rotatably connected to the second lifting arm; or both ends of the power element may be rotatably connected to the two support rods of the first lifting arm; or both ends of the power element may be rotatably connected to the two support rods of the second lifting arm.

6. The height-adjustable workbench according to claim 5, characterized in that: The fourth support rod is connected to a downwardly extending swing arm at one end near the working platform. One end of the power element is rotatably connected to the working platform, and the other end is rotatably connected to the lower end of the swing arm.

7. The height-adjustable workbench according to claim 6, characterized in that: The desktop height-adjustable workbench also includes a locking mechanism, which includes a wrench connected to the work platform and connected to the control switch of the power element via a brake cable.

8. The height-adjustable workbench according to claim 1, characterized in that: The keyboard tray is connected to the side of the work platform closest to the user. When the work platform is in its lowest position, the bottom plane of the keyboard tray is at the same horizontal level as the bottom plane of the base.

9. A height-adjustable workbench, characterized in that: It includes Work platform; A base that is placed on an existing desktop or tabletop; as well as A lifting assembly connecting the work platform and the base for adjusting the height of the work platform relative to the base, the lifting assembly including at least one set of lifting brackets, each set of lifting brackets including two lifting arms: a first lifting arm and a second lifting arm; wherein... The first lifting arm includes two support rods: a first support rod and a second support rod. The first support rod and the second support rod intersect in an X-shape and are not connected to each other. The lower ends of the first support rod and the second support rod are rotatably connected to the base, and the upper ends of the first support rod and the second support rod are respectively formed with a first rotation connection point and a second rotation connection point. The first lifting arm also includes a first pull rod. One end of the first pull rod is rotatably connected to the first rotation connection point, and the other end of the first pull rod is rotatably connected to the second support rod. The second lifting arm includes two support rods: a third support rod and a fourth support rod. The third support rod and the fourth support rod intersect in an X shape and are not connected to each other. The upper ends of the third support rod and the fourth support rod are rotatably connected to the working platform, and the lower ends of the third support rod and the fourth support rod are rotatably connected to the second rotation connection point and the first rotation connection point, respectively. The second lifting arm also includes a second tie rod, one end of which is rotatably connected to the second rotating connection point, and the other end of which is rotatably connected to the fourth support rod; and the second support rod, the fourth support rod, the first tie rod and the second tie rod form a parallelogram rotating structure; The lifting worktable also includes a power element connected between the work platform and the base to provide lift for the work platform to rise.

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