CN220001144U - Table top workbench - Google Patents

Abstract

The utility model discloses a desktop workbench, which comprises an upper platform, a lower platform and at least one group of lifting arms, wherein the upper platform is provided with a plurality of lifting arms; each group of lifting arms comprises two supporting rods with the middle parts hinged in an X shape: the first support rod and the second support rod are connected with each other in a rotatable manner, and the second end of the second connecting rod is connected with the second support rod in a rotatable manner; the lower platform, the first connecting rod, the second connecting rod and the second supporting rod form a parallelogram structure together; the first end of the elastic element is rotatably connected with the lower platform, and the second end of the elastic element is rotatably connected with the first connecting rod. The tabletop workbench enables the elastic element to provide enough lifting force or assisting force to enable the upper platform to ascend or unfold from the lowest position, and the structure is more compact when the upper platform is at the lowest position.

Description

A desktop workbench

Technical field

This application relates to the technical field of computer carrying equipment, specifically a desktop workbench.

Background technique

With the continuous development of society, flat-panel monitors, tablet computers, etc. are becoming more and more popular in ordinary families, and supporting stands have emerged as the times require. Related technology is a desktop workbench for carrying tablet computers, also known as a lifting workbench, a lifting worktable, or a desktop computer stand, etc. It is generally placed on the desktop or tabletop and can be raised or lowered to adjust the height during use to meet the user's standing requirements. The need for a healthy office style of working or alternating standing and sitting.

The structure of a related art desktop lifting workbench generally includes a lower platform, an upper platform, and an X-shaped lifting arm disposed between the lower platform and the upper platform. The lifting arm includes two X-shaped struts hinged in the middle: the first The upper end of the first support rod is rotatably connected to the upper platform, and the lower end of the first support rod is slidably fitted on the lower platform; the lower end of the second support rod is rotatably connected to the lower platform, and the second support rod is rotatably connected to the lower platform. The upper end of the rod is slidably fitted on the upper platform; the lifting workbench also includes an elastic element, which is generally a gas spring. One end of the gas spring is connected to the upper platform, and the other end of the gas spring is connected to the lifting arm. The gas spring is used to provide The lifting force of the upper platform is used to offset or partially offset the load-bearing force of the upper platform. This related technology lifting workbench controls the action of the gas spring through a gate line and a wrench connected to the upper platform so that the height of the upper platform can be adjusted.

During actual use, the inventor found that the above-mentioned lifting workbench of the related art has the following defects: one end of the elastic element of the related art lifting workbench is connected to the upper platform, and the other end is directly connected to the lifting arm; when the upper platform is deployed, The elastic element provides lift to the upper platform; however, when the upper platform is at its lowest position, the elastic element is in an approximately horizontal state. At this time, the upward lift provided by the elastic element to the upper platform is very weak, so the user needs to apply force to manually lift the upper platform upwards. A certain height, or adding other power-assisting components to provide assistance when the upper platform rises from the lowest position, so the operation is very inconvenient; especially for ultra-thin lifting workbenches, after the upper platform is folded, the height of the upper platform is set very low , the elastic element is in an approximately horizontal state, so when the upper platform rises from the lowest position, the elastic element can hardly drive the lifting arm to rotate, resulting in the upper platform not being able to rise automatically or the rising speed being too slow, so the user experience is poor.

Utility model content

The technical problem to be solved by this application is to overcome the shortcomings of the above related technologies and provide an elastic element that can provide sufficient lift or assistance to make the upper platform rise or expand upward from the lowest position, and the structure is more stable when the upper platform is at the lowest position. Compact desktop workbench.

The technical solution of this application is to provide a desktop workbench with the following structure: it includes

An upper platform, a lower platform, and at least one set of lifting arms connecting the upper platform and the lower platform and used to adjust the height of the upper platform relative to the lower platform; each set of lifting arms includes two X-shaped struts hinged in the middle: One pole and a second pole. The upper end of the first pole is rotatably connected to the upper platform. The lower end of the first pole is slidably fitted on the lower platform. The lower end of the second pole is rotatably connected to the lower platform. The upper ends of the two support rods are slidingly fitted on the upper platform;

A link mechanism is provided between the lifting arm and the lower platform, and the link mechanism includes a first link and a second link, the first link and the second support rod are arranged in parallel, and the first link The first end of the connecting rod is rotatably connected to the lower platform, the second end of the first connecting rod is rotatably connected to the first end of the second connecting rod, and the second end of the second connecting rod is rotatably connected to the second support rod. Rotating connection; the lower platform, the first connecting rod, the second connecting rod and the second support rod together form a parallelogram structure;

The first end of the elastic element is rotatably connected to the lower platform, and the second end is rotatably connected to the first connecting rod; and when the upper platform is in the lowest position, the axis or the extension line of the axis of the elastic element is connected to the first connecting rod. The connecting lines of the rotational connection points at both ends of a connecting rod are not parallel or do not overlap.

In some embodiments, the rotation connection point between the second support rod and the lower platform is set as the first rotation connection point, the rotation connection point between the first connecting rod and the lower platform is set as the second rotation connection point, and the first connecting rod The rotation connection point with the second connecting rod is set as the third rotation connection point, and the rotation connection point with the second connecting rod and the second support rod is set as the fourth rotation connection point; the first rotation connection point, the second rotation connection point The horizontal projections of the connection point, the third rotation connection point and the fourth rotation connection point on the vertical plane are sequentially surrounded to form a parallelogram.

In some embodiments, the distance from the rotation connection point of the elastic element to the first link to the third rotation connection point is smaller than the distance from the rotation connection point of the elastic element to the first link to the second rotation connection point.

In some embodiments, the height of the rotation connection point between the elastic element and the lower platform is lower than the height of the second rotation connection point, and the height of the second rotation connection point is lower than the height of the first rotation connection point.

In some embodiments, the vertical projection of the elastic element is located between the vertical projection of the second strut and the vertical projection of the first link and does not overlap.

In some embodiments, the height of the rotation connection point of the second link and the second support rod to the lower platform is higher than the height of the rotation connection point of the second support rod and the first support rod to the lower platform.

In some embodiments, a support base is connected to a side of the lower platform close to the second support rod. The support base is provided with a first connection hole and a second connection hole in sequence from top to bottom. The first connecting rod The first end of the elastic element is hinged with the first connection hole, and the first end of the elastic element is hinged with the second connection hole.

In some embodiments, there are two groups of lifting arms, and the two groups of lifting arms are respectively provided on both sides of the bottom of the upper platform. There are two link mechanisms, and they correspond to the two groups of lifting arms respectively. set up.

In some embodiments, the table lift workbench further includes a locking mechanism for locking the upper platform at different heights of its travel.

To sum up, compared with related technologies, the desktop workbench of this application has the following advantages:

The desktop workbench is provided with a linkage mechanism between the lifting arm and the lower platform. The rotation of the first linkage of the linkage mechanism can be synchronously rotated and unfolded or folded through the second linkage of the second linkage linkage of the lifting arm, thereby allowing the upper platform to rotate. Ascending or descending; the first link and the second link of the link mechanism, the lower platform and the second strut of the lifting arm together form a rotatable parallelogram structure; when the first link rotates and the second strut is synchronized During the rotation process, the first connecting rod and the second support rod always remain parallel, and they do not interfere with each other. Since the force of the elastic element acts on the first connecting rod and not directly on the second support rod, the third connecting rod The rotation, folding or unfolding of the two struts is not restricted by the installation position of the elastic element, so that the upper platform can be folded closer to the lower platform, so that the lifting workbench can be in contact with the lower platform in the folded state or when the upper platform is at its lowest position. The structure is more compact, which can reduce the packaging volume and save packaging costs.

In addition, when the upper platform is at its lowest position, the axis or extension of the axis of the elastic element is not parallel or coincident with the connecting line of the rotation connection points at both ends of the first link. That is, when the upper platform is at its lowest position, the elastic element There is an included angle between the axis or the extension line of the axis and the connecting line of the rotation connection points at both ends of the first link. Therefore, when the upper platform rises upward from the lowest position, most of the force of the elastic element is converted into the first link. The torque of the rod rotation causes the first link to provide sufficient lifting force to the lift arm through the second link to cause the lift arm to rotate and expand. Therefore, the desktop workbench enables the elastic element to provide sufficient lifting force or assist force to make the upper platform rise or unfold upward from the lowest position.

Description of the drawings

Figure 1 is a schematic structural diagram of a desktop workbench according to some embodiments of the present application.

Figure 2 is a schematic diagram of a desktop workbench from another angle according to some embodiments of the present application.

Figure 3 is a schematic side structural view of a desktop workbench according to some embodiments of the present application.

Figure 4 is a schematic diagram of the connection structure of a linkage mechanism of a desktop workbench according to some embodiments of the present application.

Figure 5 is a schematic structural diagram of a linkage mechanism of a desktop workbench from another angle according to some embodiments of the present application.

Figure 6 is a schematic side structural view of a linkage mechanism of a desktop workbench according to some embodiments of the present application.

Figure 7 is a partial structural schematic diagram of an upper platform of a desktop workbench according to some embodiments of the present application.

Figure 8 is a partial structural schematic diagram of a locking mechanism of a desktop workbench according to some embodiments of the present application.

Explanation of reference symbols:

1. Upper platform, 100. Frame, 101. Arc groove, 2. Lower platform, 3. Lifting arm, 300. First support rod, 301. Second support rod, 302. Lock plate, 303. Lock slot, 4 , Link mechanism, 400. First connecting rod, 401. Second connecting rod, 402. Support seat, 403. First rotating connection point, 404. Second rotating connection point, 405. Third rotating connection point, 406. The fourth rotating connection point, 5. Elastic element, 6. Wrench, 600. Rotating rod, 7. Rotating plate, 700. Lock pin, 701. Driving column, 8. Driving frame, 800. Driving arm, 801. Oblique long Hole, 802, hook.

Detailed ways

First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the embodiments of the present application and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments as needed to adapt to specific application situations.

In the description of the embodiments of this application, it should be noted that, unless otherwise clearly stated and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Or integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood in specific situations.

In the embodiments of this application, unless otherwise expressly provided and limited, the first feature "on" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in intermediate contact. Indirect media contact. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

The present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Figures 1 to 8, the embodiment of the present application discloses a desktop workbench, which is also called a desktop lifting workbench, a desktop lifting table, etc. Its structure includes an upper platform 1, a lower platform 2 and a connecting upper platform 1 and the lower platform 2 and at least one set of X-shaped lifting arms 3 used to adjust the height of the upper platform 1 relative to the lower platform 2; wherein the upper platform 1 is also called a table board, and a frame 100 is connected to the bottom of the table board. The platform 2 is also called the base; each set of lifting arms 3 includes two X-shaped struts hinged in the middle: the first strut 300 and the second strut 301. The upper end of the first strut 300 and the bracket at the bottom of the upper platform 1 The lower end of the first strut 300 is rotatably connected to the lower platform 2. The lower end of the second strut 301 is rotatably connected to the lower platform 2. The upper end of the second strut 301 is slidably fitted to the bracket at the bottom of the upper platform 1. ; When the upper platform 1 rises or falls relative to the lower platform 2, the lifting arm 3 can keep the upper platform 1 in a horizontal state.

In this embodiment, as shown in Figure 2, the lifting arms 3 are divided into two groups, and are distributed along the length direction of the upper platform 1 and located on both sides of the bottom of the upper platform 1; there are two connected to both sides of the bottom frame 100 of the upper platform 1 The upper slide rails are arranged in parallel, and the lower platform 2 is connected to two lower rails arranged in parallel; the two upper slide rails are connected to upper hinge seats, and the two lower rails are connected to lower hinge seats; two sets of lifting arms The upper ends of the second struts 301 of 3 are respectively hinged with the two upper hinge seats; the lower ends of the first struts 300 of the two sets of lifting arms 3 are respectively hinged with the two lower hinge seats; in this embodiment, the upper slide rail and The lower rail is a two-section slide rail or a three-section slide rail; when the upper platform 1 rises or falls relative to the lower platform 2, the first strut 300 and the second strut 301 of the two sets of lifting arms 3 make a scissor-like telescopic movement.

The new desktop workbench in this embodiment also includes a keyboard tray, which is connected to the side of the upper platform 1 close to the user through a mounting base.

Referring to Figure 1, as shown in Figures 3 to 6, the desktop workbench of this embodiment also includes an elastic element 5 connected to the lower platform 2 and a linkage 4 arranged between the lifting arm 3 and the lower platform 2, and the connecting rod mechanism 4 is The lever mechanism 4 includes a first link 400 and a second link 401. The first link 400 is arranged parallel to the second support rod 301, and the first end of the first link 400 and the lower platform 2 are rotatable. connection, the second end of the first connecting rod 400 is rotatably connected to the first end of the second connecting rod 401, and the second end of the second connecting rod 401 is rotatably connected to the second support rod 301; the lower platform 2. The first connecting rod 400, the second connecting rod 401 and the second support rod 301 together form a parallelogram structure; the first end of the elastic element 5 is rotatably connected to the lower platform 2, and the second end is connected to the first connecting rod 400 It can be rotated and connected; and when the upper platform 1 is in the lowest position, the axis or the extension line of the elastic element 5 is not parallel to or does not coincide with the connection line of the rotation connection points at both ends of the first link 400 . The elastic element 5 in this embodiment is a gas spring that can output a constant elastic force. The elastic element 5 outputs a linear thrust, and the direction of the thrust coincides with the axis direction of the elastic element 5 . In this embodiment, the rotational connection between various components, such as the rotational connection between the two ends of the first link 400 and the lower platform 2 and the second link 401 respectively, or the rotation between the second link 401 and the second support rod 301 The connection, or the rotational connection at both ends of the elastic element 5, is a rotational connection or hinged connection through a rotating shaft or a hinge pin.

In other embodiments, the elastic element 5 can also be an electric push rod or a linear motor.

In this embodiment, two link mechanisms 4 are provided, and they are respectively provided corresponding to the two sets of lifting arms 3 . Moreover, two elastic elements 5 are also provided, which are installed correspondingly to the two link mechanisms 4 respectively. This makes the upper platform 1 rise more smoothly, and when the upper platform 1 is at its lowest position and rises upwards, the two elastic elements 5 can provide enough lift to make the upper platform 1 rise automatically.

In this embodiment, as shown in Figures 3 to 7, the desktop workbench is provided with a linkage mechanism 4 between the lifting arm 3 and the lower platform 2. The first linkage 400 of the linkage mechanism 4 can rotate through the second linkage mechanism. The connecting rod 401 links the second rod 301 of the lifting arm 3 to rotate and unfold or fold synchronously, so that the upper platform 1 rises or falls; the first link 400 and the second link 401 of the link mechanism 4 are connected with the lower platform 2 and The second struts 301 of the lifting arm 3 together form a rotatable parallelogram structure; when the first link 400 rotates and the second strut 301 rotates synchronously, the first link 400 and the second strut 301 always maintain In the parallel state, the two do not interfere with each other. Since the force of the elastic element 5 acts on the first link 400 rather than directly on the second strut 301, the rotation, folding or unfolding of the second strut 301 is not affected by the elastic element. 5. The installation position is limited, so that the upper platform 1 can be folded closer to the lower platform 2, so that the structure between the lifting workbench in the folded state or when the upper platform 1 is at the lowest position and the lower platform 2 is more compact. It can reduce the packaging volume and save packaging costs.

Furthermore, in this embodiment, when the upper platform 1 is in the lowest position, the axis or the extension line of the elastic element 5 and the connection line of the rotation connection points at both ends of the first link 400 are not parallel or coincident, that is, When the upper platform 1 is in the lowest position, the axis or the extension of the axis of the elastic element 5 and the connecting line of the rotation connection points at both ends of the first link 400 are inclined to form an included angle. Therefore, when the upper platform 1 moves upward from the lowest position, When rising, most of the force of the elastic element 5 is converted into the rotational moment of the first link 400, so that the first link 400 provides sufficient lifting force to the lifting arm 3 through the second link 401 to rotate and expand the lifting arm 3. Therefore, the desktop workbench enables the elastic element 5 to provide sufficient lifting force or assist force to make the upper platform 1 rise upward or unfold from the lowest position.

In this embodiment, as shown in Figures 3 and 6, the rotation connection point between the second support rod 301 and the lower platform 2 is set as the first rotation connection point 403, and the rotation connection point between the first connecting rod 400 and the lower platform 2 is The point is set as the second rotation connection point 404, the rotation connection point of the first link 400 and the second link 401 is set as the third rotation connection point 405, and the rotation connection point of the second link 401 and the second support rod 301 Set as a fourth rotary connection point 406; the horizontal projections of the first rotary connection point 403, the second rotary connection point 404, the third rotary connection point 405 and the fourth rotary connection point 406 on the vertical plane are formed in sequence. Parallelogram. As shown in Figure 6, the XOY plane is set as a vertical plane, the horizontal projection of the first rotation connection point 403 on the vertical plane is marked as point A, and the horizontal projection of the second rotation connection point 404 on the vertical plane is marked as B. point, the horizontal projection of the third rotation connection point 405 on the vertical plane is marked as point C, the horizontal projection of the fourth rotation connection point 406 on the vertical plane is marked as point D, point A, point B, point C and point D The points are connected in turn to form a parallelogram, and point A, point B, point C and point D are the four vertices of the parallelogram. The first link 400, the second link 401, the lower platform 2 and the second support rod 301 together form a rotatable parallelogram structure. When the elastic element 5 drives the first link 400 to rotate, it can link the second part of the lifting arm 3. The support rods 301 rotate synchronously.

In some embodiments, as shown in FIG. 3 , the distance from the rotation connection point of the elastic element 5 and the first link 400 to the third rotation connection point 405 is smaller than the distance from the rotation connection point of the elastic element 5 and the first link 400 to the third rotation connection point. 2. The distance of the rotation connection point 404. This arrangement not only ensures that when the upper platform 1 is at the lowest position, there is an inclined angle between the axis of the elastic element 5 and the axis of the first link 400, but also ensures that when the upper platform 1 rises upward from the lowest position, the elastic element 5 Most of the force is converted into the rotational moment of the first link 400; and when the upper platform 1 is at the lowest position, the elastic element 5 can also rotate to a horizontal state or a nearly horizontal state to reduce the folding volume of the workbench.

In some embodiments, the height of the rotation connection point between the elastic element 5 and the lower platform 2 is lower than the height of the second rotation connection point 404 , and the height of the second rotation connection point 404 is lower than the height of the first rotation connection point 403 . Specifically, a support base 402 is connected to the side of the lower platform 2 close to the second support rod 301. The support base 402 is provided with first connection holes and second connection holes in sequence from top to bottom. The first connecting rod 400 The first end of the elastic element 5 is hinged with the first connection hole, and the first end of the elastic element 5 is hinged with the second connection hole. As shown in Figure 3, this arrangement allows the first end of the elastic element 5 to be located closer to the lower platform 2. When the upper platform 1 is at the lowest position, the first link 400, the lower platform 2 and the elastic element 5 form a triangle. The structure also ensures that when the upper platform 1 rises upward from the lowest position, most of the force of the elastic element 5 is converted into the rotation moment of the first link 400, so that the upper platform 1 can automatically rise upward from the lowest position.

In some embodiments, as shown in FIG. 5 , the vertical projection of the elastic element 5 is located between the vertical projection of the second support rod 301 and the vertical projection of the first link 400 and does not overlap. This arrangement ensures that the elastic element 5 is located between the second strut 301 and the first link 400. When the upper platform 1 is raised or folded, the elastic element 5 will not rotate the second strut 301 and the first link 400. Causes interference, and when the workbench is in the folded state, the distance between the upper platform 1 and the lower platform 2 is further reduced, making the folding more compact. The height of the rotation connection point of the second connecting rod 401 and the second support rod 301 to the lower platform 2 is higher than the height of the rotation connection point of the second support rod 301 and the first support rod 300 to the lower platform 2 .

In some embodiments, as shown in Figure 3, the height of the rotation connection point of the second link 401 and the second support rod 301 to the lower platform 2 is higher than the rotation connection point of the second support rod 301 and the first support rod 300. to the height of lower platform 2. In this way, the rotation connection point of the second link 401 and the second support rod 301 is set above the rotation connection point of the second support rod 301 and the first support rod 300, so that the rotation of the second link 401 avoids impact on the second support rod 300. The rotation of the second strut 301 and the first strut 300 causes interference.

Referring again to Figures 7 and 8, the new lifting workbench of this embodiment also includes a locking mechanism, which is used to lock the upper platform 1 at different heights of its stroke. The locking mechanism can have a variety of structures, such as setting an elastic locking rod on the lower platform 2 or the upper platform 1, and using a handle and a gate line to control the elastic locking rod to insert or detach from the lower end of the first strut 300 or the upper end of the second strut 301. , to lock or unlock the lower end of the first strut 300 or the upper end of the second strut 301; and in this embodiment, the locking mechanism is connected to the upper platform 1, and the locking mechanism includes a wrench 6 connected to the upper platform 1 and a locking mechanism. assembly, the wrench 6 is drivingly connected to the locking assembly, and is used to drive the locking assembly to unlock the upper platform 1 so that the height of the upper platform 1 can be adjusted. Further, the locking assembly includes a rotating plate 7 rotatably connected to the upper platform 1, and the rotating plate 7 is connected with a lock pin 700 that can rotate synchronously with the rotating plate 7; the upper end of the second support rod 301 is connected with a rotatable locking pin 700. The lock plate 302 slides synchronously with the upper end of the second support rod 301, and the lock plate 302 is provided with a plurality of lock slots 303 along the length direction; the lock pin 700 is engaged with any of the lock slots 303, and the rotation An elastic member is connected to the rotating shaft of the plate 7, and the elastic member enables the lock pin 700 to always have a movement tendency to engage with the lock groove 303; the wrench 6 is drivingly connected to the rotating plate 7, and is used to drive the rotating plate. 7. Rotate to disengage the lock pin 700 from the lock groove 303. Turn the wrench 6, and the wrench 6 drives the rotating plate 7 of the locking assembly to rotate, so that the lock pin 700 on the rotating plate 7 is separated from the lock groove 303 of the lock plate 302 at the upper end of the second support rod 301. At this time, the upper end of the second support rod 301 It is slidable, and the height of the upper platform 1 is adjustable; loosen the wrench 6, and the rotating plate 7 is reset under the elastic force of the elastic member such as a torsion spring, so that the lock pin 700 snaps into the lock groove 303 of the lock plate 302 at the upper end of the second support rod 301. , the upper end of the second support rod 301 is locked, thereby fixing the position of the upper platform 1 relative to the lower platform 2 . Therefore, the locking mechanism has a simple structure and is easy to operate.

In this embodiment, there are two locking mechanisms, which are respectively arranged on both sides of the bottom of the upper platform 1 and corresponding to the upper ends of the two second struts 301 of the two sets of lifting arms 3; the lifting workbench is on the upper platform 1 A rotating rod 600 is rotatably connected to the bottom, and the wrench 6 is connected to the rotating rod 600. The rotation of the wrench 6 can drive the rotating rod 600 to rotate; the rotating rod 600 is connected with two driving frames 8 that rotate synchronously with the rotating rod 600. The driving frame 8 is drivingly connected to the corresponding rotating plate 7 for driving the rotating plate 7 to rotate. In this embodiment, the frame 100 at the bottom of the upper platform 1 is provided with an arc-shaped groove 101 centered on the rotation axis of the rotating plate 7. A driving column 701 is clearance-fitted in the arc-shaped groove 101, and the driving column 701 is connected with the rotation axis. The plate 7 is fixedly connected; the driving arm 800 is provided on the driving frame 8, and the driving arm 800 is provided with an oblique long hole 801, and the driving column 701 is clearance fit in the oblique long hole 801, and the wrench 6 is rotated to drive the rotation When the rod 600 and the driving frame 8 rotate synchronously, the inner wall of the oblique long hole 801 drives the driving column 701 to slide in the arc groove 101, thereby driving the rotating plate 7 to rotate, so that the lock pin 700 is separated from the lock groove 303; it is not difficult to understand that, The rotating part of the rotating plate 7 is located in the middle of the rotating plate 7, and the driving column 701 and the locking pin 700 are located on both sides of the rotating part of the rotating plate 7. Pressing the driving column 701 can cause the locking pin 700 to tilt. In addition, the arrangement of the rotating lever 600 can enable the two locking mechanisms to be unlocked or locked at the same time.

In some embodiments, as shown in Figure 8, the drive frame 8 is connected to a hook 802 extending downward, and the lifting arm 3 or the lower platform 2 is provided with a hanging column matched with the hook 802. On the upper platform 1 is in the lowest position, the hook 802 is connected with the hanging column. The hook 802 on the drive frame 8 can keep the upper platform 1 locked with the lower platform 2 when it is in the lowest position, thus preventing the upper platform 1 from accidentally opening. In addition, the hook 802 is arranged on the driving frame 8 so that the unlocking of the hook 802 is synchronized with the unlocking of the locking mechanism, thereby making it more convenient for the user to operate.

In the description of the embodiments of the present application, it should be noted that in the description of the present application, the terms "inside", "outside" and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is merely for convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be construed as a limitation of the present application.

In the description of this application, references to the terms "one embodiment," "some embodiments," "in this embodiment," "specific examples," or "some examples" are intended to be in conjunction with the description of the embodiment or example. The specific features, mechanisms, materials, or characteristics described are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, mechanisms, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application. All are covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (9)

1. A desktop workstation, characterized in that: it comprises

The lifting arm comprises an upper platform, a lower platform and at least one group of lifting arms, wherein the lifting arms are connected with the upper platform and the lower platform and are used for adjusting the height of the upper platform relative to the lower platform; each group of lifting arms comprises two supporting rods with the middle parts hinged in an X shape: the upper end of the first supporting rod is rotatably connected with the upper platform, and the lower end of the first supporting rod is in sliding fit on the lower platform; the lower end of the second supporting rod is rotatably connected with the lower platform, and the upper end of the second supporting rod is in sliding fit with the upper platform;

the connecting rod mechanism is arranged between the lifting arm and the lower platform and comprises a first connecting rod and a second connecting rod, the first connecting rod is arranged in parallel with the second supporting rod, the first end of the first connecting rod is rotatably connected with the lower platform, the second end of the first connecting rod is rotatably connected with the first end of the second connecting rod, and the second end of the second connecting rod is rotatably connected with the second supporting rod; the lower platform, the first connecting rod, the second connecting rod and the second supporting rod jointly form a parallelogram structure;

the first end of the elastic element is rotatably connected with the lower platform, and the second end of the elastic element is rotatably connected with the first connecting rod; and when the upper platform is at the lowest position, the axis of the elastic element or the extension line of the axis is not parallel or not coincident with the connecting line of the rotating connecting points at the two ends of the first connecting rod.

2. A tabletop workbench according to claim 1, wherein: the rotating connection point of the second supporting rod and the lower platform is set to be a first rotating connection point, the rotating connection point of the first connecting rod and the lower platform is set to be a second rotating connection point, the rotating connection point of the first connecting rod and the second connecting rod is set to be a third rotating connection point, and the rotating connection point of the second connecting rod and the second supporting rod is set to be a fourth rotating connection point; horizontal projections of the first rotating connecting point, the second rotating connecting point, the third rotating connecting point and the fourth rotating connecting point on a vertical plane are sequentially arranged in a surrounding mode to form a parallelogram.

3. A tabletop workbench according to claim 2, wherein: the distance from the rotating connecting point of the elastic element and the first connecting rod to the third rotating connecting point is smaller than the distance from the rotating connecting point of the elastic element and the first connecting rod to the second rotating connecting point.

4. A tabletop workbench according to claim 2, wherein: the height of the rotating connecting point of the elastic element and the lower platform is lower than that of the second rotating connecting point, and the height of the second rotating connecting point is lower than that of the first rotating connecting point.

5. A tabletop workbench according to claim 2, wherein: the perpendicular projection of the elastic element is positioned between the perpendicular projection of the second supporting rod and the perpendicular projection of the first connecting rod and is not overlapped.

6. A tabletop workbench according to claim 1, wherein: the height from the rotation connection point of the second connecting rod and the second supporting rod to the lower platform is higher than the height from the rotation connection point of the second supporting rod and the first supporting rod to the lower platform.

7. A tabletop workbench according to claim 1, wherein: one side of the lower platform, which is close to the second supporting rod, is connected with a supporting seat, a first connecting hole and a second connecting hole are sequentially formed in the supporting seat from top to bottom, the first end of the first connecting rod is hinged to the first connecting hole, and the first end of the elastic element is hinged to the second connecting hole.

8. A tabletop workbench according to claim 1, wherein: the lifting arms are two groups, the two groups of lifting arms are respectively arranged on two sides of the bottom of the upper platform, and the two connecting rod mechanisms are respectively arranged corresponding to the two groups of lifting arms.

9. A tabletop workbench according to claim 1, wherein: the table top lift table also includes a locking mechanism for locking the upper platform at different heights of its travel.