Lifting table frame and lifting table

Abstract

The utility model discloses a kind of lifting table frame and lifting table, comprising: crossbeam;And, lifting column, lifting column includes sleeve assembly and connecting piece, connecting piece movably connects on crossbeam;Connecting piece is equipped with plugboard, crossbeam is equipped with limiting piece, lifting column has storage position and use position, plugboard is inserted to limiting piece by transverse, to lock lifting column in with crossbeam perpendicular use position;When plugboard and limiting piece transverse break away, two lifting columns are folded to relative crossbeam by rotating to each other direction to close in direction.By rotating and sliding lifting column relative to crossbeam, lifting column in storage position in package can be unfolded into use position, without alignment and locking installation of crossbeam and lifting column, plugboard and connecting piece are inserted transversely in disengaged state, lifting column can be locked in use position, prevent lifting column from rotating freely relative to crossbeam, simple and easy to operate.

Description

Technical Field

[0001] This utility model belongs to the field of furniture, specifically relating to a height-adjustable table frame and a height-adjustable table. Background Technology

[0002] With the development of technology and the improvement of living standards, height-adjustable desks are becoming increasingly popular and widely used. Currently, height-adjustable desks on the market include a tabletop and a frame installed underneath to support it. The frame has a crossbeam, lifting columns installed at both ends of the crossbeam, and feet installed at the bottom of the lifting columns. Because height-adjustable desks are relatively large, the tabletop and frame are usually packaged in multiple parts for easy packaging and transportation.

[0003] While the above packaging method reduces the packaging volume, users need to assemble the crossbeams, lifting columns, bases, and tabletops in sequence after receiving the package. This assembly is difficult and results in a poor user experience. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a height-adjustable table frame to solve the problem of difficult assembly for users after receiving the height-adjustable table.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a height-adjustable table frame, comprising: a crossbeam having a horizontally extending first crossbeam and a second crossbeam, the first crossbeam and the second crossbeam being rotatably connected, the first crossbeam and the second crossbeam switching between a coaxial usage state and a folded state where they are close together by rotation; and two height-adjustable columns, each vertically mounted at both ends of the crossbeam for driving the crossbeam to rise and fall, each height-adjustable column including a retractable sleeve assembly and a connector fixed to the top of the sleeve assembly for rising and falling with the sleeve assembly, the connector being movably connected to the crossbeam so that the connector can rotate or slide relative to the crossbeam; the connector is provided with an insert plate, the crossbeam is provided with a limiting member, the height-adjustable column has a storage position and a usage position, the insert plate is horizontally inserted into the limiting member to lock the height-adjustable column in the usage position perpendicular to the crossbeam; when the insert plate and the limiting member are horizontally disengaged, the two height-adjustable columns fold relative to the crossbeam by rotating towards each other. This technical solution has the following technical effects:

[0006] This invention features a foldable structure for the first and second crossbeams, with two lifting columns movably connected to the ends of the crossbeams via connectors. This allows the crossbeams to be folded during packaging of the lifting table, shortening the packaging length, and the lifting columns can be folded relative to the crossbeams via sliding and rotation, significantly reducing the packaging space required for the lifting table and facilitating transportation. Upon receiving the lifting table, the user simply rotates and slides the lifting columns relative to the crossbeams to unfold them from their storage position into their usable position. No alignment or locking of the crossbeams and lifting columns is required. During the sliding of the lifting columns relative to the crossbeams, the detached insert plate and connector can be horizontally inserted to vertically limit the insertion plate, locking the lifting columns in their usable position and preventing free rotation relative to the crossbeams. The design is simple and easy to operate; users can unpack and install the table themselves without tools, reducing assembly difficulty, increasing efficiency, and enhancing the user experience.

[0007] In the aforementioned type of height-adjustable table frame, the limiting component includes an upper baffle and a lower baffle. When the insert plate is inserted into the limiting component, the upper baffle and the lower baffle are located on the upper and lower sides of the insert plate, respectively, and abut against the insert plate. By setting the limiting component into a structure where the upper and lower baffles cooperate, it is possible to limit the connecting component and ensure the strength of the crossbeam by preventing the connecting component from rotating relative to the crossbeam, without having to open holes or slots on the crossbeam to reduce its strength.

[0008] In the aforementioned type of height-adjustable table frame, the crossbeam has a hollow structure, including a bottom wall and side walls on both sides of the bottom wall. The upper edge of the side walls extends outward to form a flange, and the upper baffle is also a flange. By using the flange of the crossbeam as the upper baffle, the flange can be fixed to the tabletop by screws or other locking devices, and can also serve as an upper baffle to limit the position of the insert plate, simplifying the structure of the crossbeam and reducing the difficulty of manufacturing and processing the crossbeam.

[0009] In the aforementioned type of lifting table frame, the limiting component also includes a stop plate. The stop plate is located at the end of the lower baffle and extends upward. When the insert plate is laterally inserted into the limiting component, the stop plate abuts against the insert plate to prevent the insert plate from moving further. During the lateral insertion process of the insert plate and the limiting component, the stop plate can stop the insert plate. When the insert plate abuts against the stop plate, it indicates that the insert plate has been assembled with the limiting component, preventing the insert plate from moving further laterally and ensuring that the insert plate remains in a stable abutment position against the upper and lower baffles. This prevents the connecting component from rotating freely relative to the crossbeam and also serves as a reminder to the assembly personnel, improving the assembly experience.

[0010] In the aforementioned type of lifting table frame, the upper edge of the side wall of the crossbeam extends outward to form a flange, the upper baffle is a flange, and the stop plate is connected between the lower baffle and the flange, so that the lower baffle and the flange are integrated, reducing the manufacturing difficulty of the limiting component.

[0011] In the aforementioned type of lifting table frame, the upper and lower baffles are staggered horizontally so that their projections on the horizontal plane do not overlap. When the lifting column rotates to be perpendicular to the crossbeam, the insert plate can abut against the upper baffle to prevent the lifting column from continuing to rotate. When the insert plate is inserted into the limiting component, the upper baffle can guide the horizontally moving connecting component. After insertion, the upper part of one end of the insert plate abuts against the upper baffle, and the lower part of the other end of the insert plate abuts against the lower baffle. The upper and lower baffles can then limit the vertical movement of both ends of the insert plate, providing a good limiting effect while improving the assembly experience.

[0012] In the aforementioned type of lifting table frame, the connecting component includes a base plate and side plates located on both sides of the base plate. The two side plates are bent upwards to form support grooves on the connecting component that cooperate with the crossbeam. The upper edge of the side plates extends outwards to form insert plates. By integrating the insert plates and side plates into one piece, the manufacturing difficulty of the insert plates is reduced, while the strength of the insert plates is enhanced, ensuring that the insert plates can be stably inserted into the limiting components to prevent the lifting column from rotating.

[0013] In the aforementioned type of height-adjustable table frame, the side plate has horizontally extending sliding holes, and a pivot is installed on the crossbeam. The pivot is horizontally inserted into the sliding holes, allowing the connector to rotate or slide relative to the crossbeam. When the lifting column is in the retracted position, the pivot is at one end of the sliding hole. When the lifting column rotates to be perpendicular to the crossbeam, the connector with the sliding hole rotates relative to the pivot. When the lifting column moves from the position where the insert plate is disengaged from the limiting member to the position where the insert plate is engaged with the limiting member, the connector with the sliding hole translates relative to the pivot, allowing the pivot to slide to the other end of the sliding hole. Through the cooperation of the pivot and the sliding hole, the rotation and sliding of the connector relative to the crossbeam can be achieved. The structure is simple, reliable, and the connection is stable.

[0014] In the aforementioned type of lifting table frame, the bottom of the crossbeam and the connecting member are respectively provided with a first locking member and a second locking member. The first locking member and the second locking member are locked together to prevent the insert plate from freely disengaging from the limiting member. When the first locking member and the second locking member are locked together, it can prevent the crossbeam and the connecting member from undergoing relative displacement in the horizontal direction, that is, prevent the insert plate from freely disengaging from the limiting member, thereby preventing the lifting column from losing the limiting member's restraint and rotating freely. This makes the installation of the lifting column on the crossbeam more stable and reliable, so that the user can install the fixed lifting table frame onto the bottom of the tabletop.

[0015] This utility model also provides a height-adjustable table, including a tabletop and a height-adjustable table frame installed at the bottom of the tabletop. The height-adjustable table frame is the aforementioned height-adjustable table frame, and a crossbeam is installed at the bottom of the tabletop.

[0016] The features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0018] Figure 1 A 3D view of the lifting table frame when the lifting column is in the use position;

[0019] Figure 2 This is a schematic diagram showing the insertion of the insert plate and the limiting component.

[0020] Figure 3 This is a schematic diagram showing the insertion plate and the limiting component detaching.

[0021] Figure 4 A 3D view of the lift table frame when the lifting column is in the storage position;

[0022] Figure 5 This is a partial schematic diagram of the lifting table frame when the lifting column is in the storage position;

[0023] Figure 6 A three-dimensional view of the connector;

[0024] Figure 7 This is a partial schematic diagram of the crossbeam.

[0025] Figure label:

[0026] 100. Crossbeam; 110. First crossbeam; 120. Second crossbeam; 130. Bottom wall; 140. Side wall; 150. Receiving groove; 160. Flanged edge; 170. Rotating shaft; 181. Fixing block; 182. Snap ring;

[0027] 200. Lifting column; 210. Sleeve assembly;

[0028] 300. Limiting component; 310. Upper baffle; 320. Lower baffle; 330. Stop plate;

[0029] 400. Connector; 410. Base plate; 420. Side plate; 421. Sliding hole; 430. Insert plate; 440. Support groove; 450. Hook. Detailed Implementation

[0030] This utility model proposes a height-adjustable table frame, comprising: a crossbeam having a horizontally extending first crossbeam and a second crossbeam, the first and second crossbeams being rotatably connected, the first and second crossbeams being able to switch between a coaxial usage state and a folded state where they are close together by rotation; and two height-adjustable columns, each vertically positioned at one end of the crossbeam for driving the crossbeam to rise and fall, each height-adjustable column including a retractable sleeve assembly and a connector fixed to the top of the sleeve assembly for rising and falling with the sleeve assembly, the connector being movably connected to the crossbeam so that the connector can rotate or slide relative to the crossbeam; the connector is provided with an insert plate, the crossbeam is provided with a limiting member, the height-adjustable column has a storage position and a usage position, the insert plate being horizontally inserted into the limiting member to lock the height-adjustable column in the usage position perpendicular to the crossbeam; when the insert plate and the limiting member are horizontally disengaged, the two height-adjustable columns fold relative to the crossbeam by rotating towards each other. This invention features a foldable structure for the first and second crossbeams, with two lifting columns movably connected to the ends of the crossbeams via connectors. This allows the crossbeams to be folded during packaging of the lifting table, shortening the packaging length, and the lifting columns can be folded relative to the crossbeams via sliding and rotation, significantly reducing the packaging space required for the lifting table and facilitating transportation. Upon receiving the lifting table, the user simply rotates and slides the lifting columns relative to the crossbeams to unfold them from their storage position into their usable position. No alignment or locking of the crossbeams and lifting columns is required. During the sliding of the lifting columns relative to the crossbeams, the detached insert plate and connector can be horizontally inserted to vertically limit the insertion plate, locking the lifting columns in their usable position and preventing free rotation relative to the crossbeams. The design is simple and easy to operate; users can unpack and install the table themselves without tools, reducing assembly difficulty, increasing efficiency, and enhancing the user experience.

[0031] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] Example 1:

[0037] A type of height-adjustable desk frame, such as Figures 1 to 7As shown, the device includes a crossbeam 100 and two lifting columns 200. The crossbeam 100 includes a horizontally extending first crossbeam 110 and a second crossbeam 120. The adjacent ends of the first crossbeam 110 and the second crossbeam 120 are rotatably connected. By rotating, the first crossbeam 110 and the second crossbeam 120 can switch between a coaxial usage state and a folded state where they are close together. When the crossbeam 100 is in the usage state, the crossbeam 100 is unfolded, and the first crossbeam 110 and the second crossbeam 120 are coaxially arranged. When the crossbeam 100 is in the folded state, the crossbeam 100 is folded, and the free ends of the first crossbeam 110 and the second crossbeam 120 are close together. The first crossbeam 110 and the second crossbeam 120 are arranged parallel to each other. Two lifting columns 200 are vertically installed at both ends of the crossbeam 100 to drive the crossbeam 100 to rise and fall. The lifting column 200 includes a sleeve assembly 210 and a lifting assembly. The lifting assembly is installed inside the sleeve assembly 210 to drive the sleeve assembly 210 to extend and retract. The sleeve assembly 210 drives the crossbeam 100 to rise and fall by extending and retracting. A connecting member 400 that rises and falls with the sleeve assembly 210 is fixed at the top of the sleeve assembly 210. The connecting member 400 is movably connected to the crossbeam 100 so that the connecting member 400 can rotate or slide relative to the crossbeam 100. That is, the top of the lifting column 200 and the crossbeam 100 can rotate or slide relative to each other.

[0038] The connector 400 is provided with a plate 430, the crossbeam 100 is provided with a limiting member 300, and the lifting column 200 has a storage position and a use position. When the lifting column 200 is in the storage position, the two lifting columns 200 are folded relative to the crossbeam 100 in the direction of moving closer to each other, so that the two lifting columns 200 are respectively arranged parallel to each other on the bottom surface of the crossbeam 100. When a user needs to switch the lifting column 200 from the storage position to the use position, first rotate the two lifting columns 200 away from each other relative to the crossbeam 100 until the lifting column 200 is perpendicular to the crossbeam 100. At this time, the insert plate 430 and the limiting member 300 are disengaged. Then, move the lifting column 200 laterally so that the insert plate 430 on the connector 400 is inserted laterally into the limiting member 300. The upper and lower sides of the insert plate 430 abut against the limiting member 300 to limit the insert plate 430 in the vertical direction, thereby preventing the lifting column 200 from rotating freely relative to the crossbeam 100 and locking the lifting column 200 in the use position.

[0039] This invention sets the first crossbeam 110 and the second crossbeam 120 into a foldable structure, and connects the two lifting columns 200 to the ends of the crossbeam 100 via connectors 400. This allows the crossbeam 100 to be folded to shorten the packaging length occupied by the crossbeam 100 when packaging the lifting table frame. The lifting columns 200 can also be folded relative to the crossbeam 100 by sliding and rotating, greatly reducing the packaging space occupied by the lifting table frame and facilitating transportation. After receiving the lifting table frame, users only need to rotate and slide the lifting column 200 relative to the crossbeam 100 to unfold the lifting column 200 from its storage position in the package into its working position. There is no need to align and lock the crossbeam 100 and the lifting column 200. During the sliding of the lifting column 200 relative to the crossbeam 100, the detached insert plate 430 and connector 400 can be inserted horizontally to limit the vertical direction of the insert plate 430, thus locking the lifting column 200 in its working position and preventing it from rotating freely relative to the crossbeam 100. It is simple and easy to operate. After receiving the package, users can unpack and install it themselves without the help of tools, reducing the difficulty of self-assembly, improving assembly efficiency, and enhancing the user experience.

[0040] In this embodiment, the limiting member 300 includes an upper baffle 310 and a lower baffle 320. When the insert plate 430 is inserted into the limiting member 300, the upper baffle 310 is located above the insert plate 430, and the lower baffle 320 is located below the insert plate 430. The upper and lower sides of the insert plate 430 abut against the upper baffle 310 and the lower baffle 320, respectively. By setting the limiting member 300 into a structure in which the upper baffle 310 and the lower baffle 320 cooperate, it is possible to limit the connecting member 400 and ensure the strength of the crossbeam 100 by preventing the connecting member 400 from rotating relative to the crossbeam 100 without opening holes or slots on the crossbeam 100 to reduce the strength of the crossbeam 100.

[0041] In this embodiment, the crossbeam 100 has a hollow structure. The crossbeam 100 includes a bottom wall 130 and side walls 140 on both sides of the bottom wall 130. The side walls 140 on both sides of the bottom wall 130 extend upward to form an upward-opening receiving groove 150 together with the bottom wall 130, which is used to accommodate the controller that drives the lifting assembly to lift. The upper edge of the side wall 140 extends outward to form a flange 160, and the upper baffle 310 is the flange 160. By using the flange 160 of the crossbeam 100 as the upper baffle 310, the flange 160 can be fixed to the tabletop by screws or other locking devices, or it can partially serve as the upper baffle 310 to limit the insertion plate 430, simplifying the structure of the crossbeam 100 and reducing the manufacturing difficulty of the crossbeam 100.

[0042] In this embodiment, the limiting member 300 further includes a stop plate 330, which is disposed at one end of the lower baffle 320. The stop plate 330 extends upward from the end of the lower baffle 320, so that during the lateral insertion of the insert plate 430 and the limiting member 300, the stop plate 330 can stop the insert plate 430. Figure 1 As shown, when the insert plate 430 abuts against the stop plate 330, it indicates that the insert plate 430 has been assembled with the limit member 300, preventing the insert plate 430 from continuing to move laterally and ensuring that the insert plate 430 stays in a stable position abutting against the upper baffle 310 and the lower baffle 320, so as to prevent the connector 400 from rotating freely relative to the crossbeam 100, and at the same time indicating to the assembly personnel that it has been installed in place, thus improving the assembly experience.

[0043] The flange 160, which forms part of the upper baffle 310, is disconnected from the other parts of the flange 160. The stop plate 330 is connected between the lower baffle 320 and the flange 160 adjacent to the upper baffle 310, so that the lower baffle 320 and the flange 160 are integrally formed. That is, the end of the flange 160 adjacent to the upper baffle 310 facing the upper baffle 310 is bent downward to form the stop plate 330 and the lower baffle 320, reducing the manufacturing difficulty of the limiting member 300. Preferably, the upper baffle 310 and the lower baffle 320 are staggered in the horizontal direction, that is, the projections of the upper baffle 310 and the lower baffle 320 on the horizontal plane do not coincide. When the lifting column 200 rotates to be perpendicular to the crossbeam 100, such as Figure 3 As shown, the insert plate 430 abuts against the upper baffle 310 to prevent the lifting column 200 from continuing to rotate. When the insert plate 430 is inserted into the limiting member 300, the upper baffle 310 can guide the horizontally moving connecting member 400. After the insertion is completed, as shown... Figure 2 As shown, the upper part of one end of the insert plate 430 abuts against the upper baffle 310, and the lower part of the other end of the insert plate 430 abuts against the lower baffle 320. The upper baffle 310 and the lower baffle 320 can limit the two ends of the insert plate 430 in the vertical direction, which not only has a good limiting effect, but also improves the assembly experience.

[0044] Both sides of any end of the crossbeam 100 are symmetrically provided with limiting members 300. Each side can have one or more (two or more). In this embodiment, it is preferred that each side is provided with two limiting members 300. On the same side, the lower baffle 320, the stop plate 330 and the upper baffle 310 of the adjacent limiting member 300 are integrally provided.

[0045] In this embodiment, the connector 400 includes a base plate 410 and side plates 420 disposed on both sides of the base plate 410. The two side plates 420 are bent upward to form a support groove 440 on the connector 400 that cooperates with the crossbeam 100. The inner bottom wall 130 of the support groove 440 can abut against the bottom surface of the crossbeam 100 to prompt the user that the lifting column 200 has rotated into place. When the lifting column 200 supports the crossbeam 100, the base plate 410 and the two side plates 420 of the connector 400 simultaneously support and limit the bottom and both sides of the crossbeam 100, increasing the contact area, facilitating assembly, and providing good support. The upper edge of the side plate 420 extends outward to form an insert plate 430. By integrally setting the insert plate 430 and the side plate 420, the manufacturing difficulty of the insert plate 430 is reduced, while the strength of the insert plate 430 is enhanced, ensuring that the insert plate 430 can be stably inserted into the limiting member 300 to prevent the lifting column 200 from rotating.

[0046] like Figure 5 and Figure 6 As shown, a horizontally extending sliding hole 421 is provided on the side plate 420. The sliding hole 421 is an oblong hole. A rotating shaft 170 is installed on the crossbeam 100. The rotating shaft 170 is horizontally inserted into the sliding hole 421, so that relative rotation or sliding can occur between the rotating shaft 170 and the sliding hole 421. Figure 5 As shown, when the lifting column 200 is in the retracted position, the rotating shaft 170 is at one end of the sliding hole 421, as... Figure 3 As shown, when the lifting column 200 rotates to be perpendicular to the crossbeam 100, the connector 400 with the sliding hole 421 rotates relative to the rotating shaft 170, as... Figure 2 As shown, when the lifting column 200 moves from the position where the insert plate 430 is disengaged from the limiting member 300 to the position where the insert plate 430 is inserted into the limiting member 300, the connector 400 with the sliding hole 421 translates relative to the rotating shaft 170, so that the rotating shaft 170 slides to the other end of the sliding hole 421. Through the cooperation of the rotating shaft 170 and the sliding hole 421, the connector 400 can rotate and slide relative to the crossbeam 100, resulting in a simple, reliable, and stable structure. Preferably, the rotating shaft 170 is mounted on the crossbeam 100, and the end of the rotating shaft 170 abuts against the side of the side plate 420 opposite to the crossbeam 100, thereby limiting the side plate 420 along the axial direction of the rotating shaft 170.

[0047] A first locking member and a second locking member are respectively provided at the bottom of the crossbeam 100 and the connector 400. When the first locking member and the second locking member are locked, the crossbeam 100 and the connector 400 can be prevented from undergoing relative displacement in the horizontal direction. That is, the insert plate 430 is prevented from freely disengaging from the limiting member 300, thereby preventing the lifting column 200 from losing the limiting position of the limiting member 300 and rotating freely. This makes the installation of the lifting column 200 on the crossbeam 100 more stable and reliable, so that the user can install the fixed lifting table frame onto the bottom of the table. In this embodiment, the first and second locking components can have various structures, such as a horizontally inserted locking screw and locking nut, or a horizontally inserted pin and socket. Preferably, the first locking component includes a fixing block 181 and a retaining ring 182. The fixing block 181 is fixed to the bottom of the crossbeam 100, and one end of the retaining ring 182 is rotatably connected to the fixing block 181. The second locking component is a hook 450 fixed to the bottom of the connector 400. The retaining ring 182 can be rotated to engage or disengage with the hook 450. When the hook 450 is engaged within the retaining ring 182, the first and second locking components are locked. This structure is simple, easy for users to operate, and reduces the time required to lock the first and second locking components. In this embodiment, clearance grooves are provided at the bottom of both the crossbeam 100 and the connector 400, and the first and second locking components are respectively located in two clearance grooves, which is more aesthetically pleasing.

[0048] Example 2:

[0049] A height-adjustable desk includes a tabletop and a height-adjustable table frame installed at the bottom of the tabletop. The height-adjustable table frame is the same as the one described in the above embodiment. A crossbeam is installed at the bottom of the tabletop and locked to the tabletop with screws.

[0050] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A height-adjustable table frame, characterized in that, include: A crossbeam having a horizontally extending first crossbeam and a second crossbeam, the first crossbeam and the second crossbeam being rotatably connected, the first crossbeam and the second crossbeam being rotatably connected to switch between a coaxial usage state and a folded state in which they are close together; and, The lifting column is provided in two parts, which are respectively vertically installed at both ends of the crossbeam to drive the crossbeam to rise and fall. The lifting column includes a telescopic sleeve assembly and a connector fixed to the top of the sleeve assembly to rise and fall with the sleeve assembly. The connector is movably connected to the crossbeam so that the connector can rotate or slide relative to the crossbeam. The connector is provided with an insert plate, the crossbeam is provided with a limiting member, and the lifting column has a storage position and a use position. The insert plate is inserted laterally into the limiting member to lock the lifting column in the use position perpendicular to the crossbeam. When the insert plate and the limiting member are laterally disengaged, the two lifting columns are rotated toward each other to fold relative to the crossbeam.

2. The height-adjustable table frame according to claim 1, characterized in that: The limiting member includes an upper baffle and a lower baffle. When the insert plate is inserted into the limiting member, the upper baffle and the lower baffle are located on the upper and lower sides of the insert plate respectively and abut against the insert plate.

3. The height-adjustable table frame according to claim 2, characterized in that: The crossbeam is a hollow structure, including a bottom wall and side walls on both sides of the bottom wall. The upper edge of the side wall extends outward to form a flange, and the upper baffle is the flange.

4. A height-adjustable table frame according to claim 2, characterized in that: The limiting member also includes a stop plate, which is located at the end of the lower baffle and extends upward. When the insert plate is inserted laterally into the limiting member, the stop plate abuts against the insert plate to prevent the insert plate from moving further.

5. A height-adjustable table frame according to claim 4, characterized in that: The upper edge of the sidewall of the crossbeam extends outward to form a flange, the upper baffle is the flange, and the stop plate is connected between the lower baffle and the flange so that the lower baffle and the flange are integrally formed.

6. A height-adjustable table frame according to claim 2, characterized in that: The upper baffle and the lower baffle are staggered in the horizontal direction so that the projections of the upper baffle and the lower baffle on the horizontal plane do not coincide.

7. A height-adjustable table frame according to claim 1, characterized in that: The connector includes a base plate and side plates on both sides of the base plate. The two side plates are bent upward to form a support groove on the connector that cooperates with the crossbeam. The upper edge of the side plates extends outward to form the insert plate.

8. A height-adjustable table frame according to claim 7, characterized in that: The side plate is provided with a horizontally extending sliding hole, and a rotating shaft is installed on the crossbeam. The rotating shaft is horizontally inserted into the sliding hole so that the connector can rotate or slide relative to the crossbeam.

9. A height-adjustable table frame according to claim 1, characterized in that: The bottom of the crossbeam and the connector are respectively provided with a first locking member and a second locking member. The first locking member and the second locking member are locked together to prevent the insert plate from freely separating from the limiting member.

10. A height-adjustable desk, comprising a desk panel and a height-adjustable desk frame installed at the bottom of the desk panel, characterized in that: The lifting table frame is the lifting table frame according to any one of claims 1 to 9, and the crossbeam is installed at the bottom of the tabletop.

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