A table frame for a table and a table

Abstract

The present invention discloses a table frame and a table for a table, including two table leg assemblies and a telescopic cross beam connected between the two. The upper parts of the two table leg assemblies have supporting parts for supporting a tabletop. The telescopic cross beam includes a first cross beam and a second cross beam that are sleeved with each other and can relatively telescopically move. A partition groove is arranged on the first cross beam along its telescopic direction for partially partitioning the first cross beam into an upper cross beam and a lower cross beam. When the telescopic cross beam is in the extended state, the sleeved part of the second cross beam is lifted by the lower cross beam so that its upper end face is higher than the supporting part, and the sleeved part of the upper cross beam is lifted by the second cross beam so that its upper end face is higher than the supporting part, for pressing on the tabletop to provide support when the table frame is connected to the tabletop. When the above-mentioned telescopic cross beam is in the extended state, part of the structure of the telescopic cross beam will be lifted and press on the tabletop to increase the support strength of the telescopic cross beam for the tabletop.

Description

Technical Field

[0001] The present invention relates to the technical field of furniture, and particularly to a table frame and a table for a table. Background Art

[0002] Traditional lifting tables generally include a tabletop and a table frame. The table frame includes two table leg assemblies and a telescopic cross beam connected between the two table leg assemblies. The table frame can adapt to tabletops of different lengths through the telescopic action of the telescopic cross beam. However, as the telescopic cross beam extends, the supporting strength of the table frame at the middle position of the tabletop will weaken accordingly, resulting in an increase in the shaking amount of the table. Summary of the Invention

[0003] In order to overcome the deficiency in the prior art that as the telescopic cross beam extends, the supporting strength of the table frame at the middle position of the tabletop will weaken, the present invention provides a table frame for a table. In the extended state of the telescopic cross beam, a part of the structure of the telescopic cross beam will be lifted and pressed against the tabletop to increase the supporting strength of the telescopic cross beam on the tabletop.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A table frame for a table, comprising two table leg assemblies and a telescopic cross beam connected between the two. The upper parts of the two table leg assemblies have supporting parts for supporting the tabletop, and the supporting parts of the two table leg assemblies are on the same horizontal plane. The telescopic cross beam includes a first cross beam and a second cross beam that are sleeved with each other and can relatively telescope, so that the telescopic cross beam can switch between a contracted state and an extended state with a length greater than the contracted state. A partition groove is provided on the first cross beam along its telescopic direction for partially partitioning the first cross beam into an upper cross beam and a lower cross beam. In the contracted state of the telescopic cross beam, the upper cross beam and the upper end surface of the second cross beam are lower than or flush with the supporting part. In the extended state of the telescopic cross beam, the sleeved part of the second cross beam is lifted by the lower cross beam so that its upper end surface is higher than the supporting part, and the sleeved part of the upper cross beam is lifted by the second cross beam so that its upper end surface is higher than the supporting part, for pressing against the tabletop to provide support when the table frame is connected to the tabletop.

[0006] In the above technical solution, when the telescopic crossbeam is in the extended state, the sleeved part of the second crossbeam is lifted by the first crossbeam so that its upper end is higher than the supporting part, and the sleeved part of the upper crossbeam is lifted by the second crossbeam so that its upper end face is higher than the supporting part. The upper end faces of the second crossbeam and the upper crossbeam that are higher than the supporting part will squeeze the lower end face of the tabletop, providing a supporting effect on the tabletop. And the above squeezing force will cause the lower crossbeam to have a small downward deformation, and the deformed lower crossbeam will generate a corresponding reaction force and act on the tabletop, making the supported part of the tabletop and the first crossbeam less likely to further deform, so as to increase the supporting strength of the telescopic crossbeam on the tabletop at the sleeved position of the telescopic crossbeam. In the above technical solution, the upper end faces of the upper crossbeam and the second crossbeam are lifted synchronously, and the upper crossbeam and the second crossbeam support the tabletop on both sides of the tabletop at the same time, so that the telescopic crossbeam can completely support the tabletop in the length direction, and the supporting effect can be increased. When the telescopic crossbeam is in the extended state, the sleeved position of the telescopic crossbeam and the two supporting parts can form four-point support for the tabletop. Compared with the two-point support formed by the original two supporting parts, two more supporting points can be added, so as to increase the supporting strength of the table frame on the tabletop. And the sleeved position of the telescopic crossbeam is arranged in the middle of the two supporting parts, and the supporting effect of the two supporting parts on the tabletop is the weakest at the middle position of the two supporting parts. The sleeved position of the telescopic crossbeam can support and strengthen the tabletop at this position, and can solve the problem of insufficient supporting effect of the middle position of the two supporting parts on the tabletop. The sleeved position of the telescopic crossbeam is closer to the middle position of the tabletop than the two supporting parts. Therefore, the above solution can increase the supporting strength of the middle position of the tabletop. In the above technical solution, as the length of the telescopic crossbeam increases, the supporting strength of the table frame on the middle position of the tabletop also increases, which can solve the problems that in traditional tables, as the telescopic table frame elongates, the supporting strength of the middle position of the table decreases and the amount of shaking increases. And the cost of implementing the above technical solution is relatively low, the structure is relatively simple and stable, and it will not increase the installation difficulty of the table.

[0007] Preferably, one end of the partition groove close to the free end of the first crossbeam is open, and one end of the partition groove away from the free end of the first crossbeam is closed. A sliding shaft that can slide along the partition groove is fixed on the second crossbeam, and the upper side of the partition groove is in contact with the sliding shaft. When the sleeved part of the second crossbeam is lifted by the lower crossbeam, the sliding shaft lifts the upper crossbeam along.

[0008] Preferably, the width of the partition groove decreases from the closed end to the open end of the partition groove, and the upper end face of the lower beam is inclined, and the height of the upper end face of the lower beam increases from one side close to the fixed end of the first beam to the other side, and the sliding shaft contacts the upper end face of the lower beam. When the telescopic beam switches from a contracted state to an extended state, the sliding shaft slides along the partition groove and is lifted by the upper end face of the lower beam, so that the second beam is lifted, and the sliding shaft is lifted while the upper beam is lifted.

[0009] In the above technical solution, when the telescopic beam switches from a contracted state to an extended state, the sliding shaft slides along the partition groove, and while the sliding shaft slides, it is lifted by the upper end surface of the lower beam, and the upper end surface of the second beam is synchronously lifted to support the table top. Since the width of the partition groove decreases from the closed end to the open end of the partition groove, the lifted sliding shaft can lift the upper beam through the lower end surface of the upper beam, so that the upper end surface of the upper beam is higher than the supporting part, which can apply pressure to the table top to provide support. The partition groove has multiple functions: first, the upper end surface of the upper beam (i.e., the lower end surface of the partition groove) has a guiding and supporting function, and when the telescopic beam switches from a contracted state to an extended state, the upper end surface of the second beam can be lifted to squeeze the lower end surface of the table board and strengthen the support for the table board; second, the partition groove divides the first beam into an upper beam and a lower beam, and the lower beam can provide support during the extension and retraction process. The upper beam can deform upward under the action of the sliding shaft to squeeze the table board and provide support. When the telescopic beam is in the extended state, the table board on one side of the first beam can also be supported by the upper beam, thereby increasing the support effect on this side; fourth, during the extension process of the telescopic beam, the telescopic beam can stop at any length position and can be adapted according to the length of the table board; fifth, multiple functions can be realized by providing only one partition groove, and the processing difficulty of the first beam is not greatly increased, so the processing cost can be reduced as much as possible. During the sliding process of the sliding shaft along the partition groove, the longer the extended length of the telescopic beam is, the higher the height at which the second beam and the upper beam are lifted, and the higher the height at which the lifted second beam and the upper beam are above the supporting part, the stronger the supporting strength of the second beam and the upper beam for the table top is. This achieves the purpose of increasing the supporting strength of the table frame for the middle position of the table top as the length of the telescopic beam increases, and can solve the problem that the supporting strength of the middle position of the traditional table weakens and the amount of shaking increases as the retractable table frame extends.

[0010] Preferably, the upper end face of the upper cross beam is a first arc surface, the height of the first arc surface close to the suspended end of the first cross beam is lower than the height of the first arc surface close to the fixed end of the first cross beam, and the upper side surface of the partition groove is a second arc surface adapted to the first arc surface, so that the thickness of the upper cross beam at each position along its length direction is the same.

[0011] In the above technical solution, when the middle position of the upper crossbeam is lifted by the sliding shaft, a simple lever structure is formed between the upper crossbeam and the sliding shaft. The overhanging end of the upper crossbeam will also rise, and the rising height is higher than that of the middle position of the upper crossbeam. The first arc surface can offset the rising height of the overhanging end, avoiding the contact between the overhanging end of the upper crossbeam and the tabletop, enabling the supported position of the upper crossbeam and the positions between the supported position and the upper crossbeam to squeeze the tabletop and form a support for the tabletop, while the tabletop near the overhanging end of the upper crossbeam is supported by the upper end surface of the second crossbeam. The thickness of the upper crossbeam is the same at each position in its length direction. The height of the upper end surface of the upper crossbeam above the support part and the height of the upper end surface of the second crossbeam above the support part are both determined by the inclination amount of the upper end surface of the lower crossbeam. Their protruding heights are the same, which can form similar supporting forces on the tabletop and are not likely to interfere with each other.

[0012] Preferably, a jacking inclined surface is provided on the first crossbeam and is inclined along its length direction, and a contact inclined surface is provided on the second crossbeam and is inclined along its length direction. The contact inclined surface is adapted to and contacts the jacking inclined surface. When the telescopic crossbeam is in the contracted state, the high end of the jacking inclined surface contacts the high end of the contact inclined surface, and the low end of the jacking inclined surface contacts the low end of the contact inclined surface. When the telescopic crossbeam switches from the contracted state to the extended state, the contact inclined surface slides along the jacking inclined surface, so that the low end of the second crossbeam moves towards the high end of the first crossbeam, causing the second crossbeam to be lifted.

[0013] In the above technical solution, when the telescopic crossbeam is in the contracted state, the high end of the first crossbeam contacts the high end of the second crossbeam, and the low end of the first crossbeam contacts the low end of the second crossbeam, which can play an avoidance role to prevent the upper end surface of the second crossbeam from being higher than the support part. In the contracted state, the upper ends of the first crossbeam and the second crossbeam are both in contact with the tabletop and play a supporting role. When the telescopic crossbeam switches from the contracted state to the extended state, the contact inclined surface slides along the jacking inclined surface. The longer the extended length of the telescopic crossbeam, the higher the lifted height of the second crossbeam, and the higher the height of the lifted second crossbeam above the support part. The stronger the supporting strength of the second crossbeam on the tabletop, achieving the purpose that as the length of the telescopic crossbeam increases, the supporting strength of the table frame on the middle position of the tabletop also increases, and it can solve the problem that in traditional tables, as the retractable table frame extends, the supporting strength of the middle position of the table weakens and the shaking amount becomes larger. And during the extension process of the above telescopic crossbeam, when the telescopic crossbeam extends to any length position, the second crossbeam will be lifted to the corresponding height and strengthen the supporting effect on the tabletop. Therefore, within the adaptation range of the table frame, the table frame can be adapted according to the length of the tabletop, and at the same time, ensure the strengthening effect of the table frame on the support of the tabletop.

[0014] Preferably, a jacking inclined surface is provided on the first cross beam and is inclined along its length direction. A contact block is provided at the suspended end of the second cross beam, and the contact block contacts the jacking inclined surface so that when the telescopic cross beam switches from the contracted state to the extended state, the contact block slides along the jacking inclined surface and the second cross beam is lifted.

[0015] In the above technical solution, when the telescopic cross beam is in the contracted state, the upper end surfaces of the first cross beam and the second cross beam both contact the tabletop to play a supporting role. When the telescopic cross beam switches from the contracted state to the extended state, the contact block slides along the jacking inclined surface. The longer the extended length of the telescopic cross beam is, the higher the height of the position where the jacking inclined surface contacts the contact block is, the higher the height that the contact block and the second cross beam are lifted is, and the stronger the supporting strength of the second cross beam on the tabletop is. The purpose that the supporting strength of the table frame on the middle position of the tabletop is also enhanced as the length of the telescopic cross beam elongates is achieved, and the problem that the supporting strength of the middle position of the traditional table weakens and the shaking amount becomes larger as the retractable table frame elongates can be solved. Moreover, during the elongation process of the telescopic cross beam, when the telescopic cross beam elongates to any length position, the second cross beam will be lifted by a corresponding height and the supporting effect on the tabletop will be strengthened. Therefore, within the adaptation range of the table frame, the table frame can be adapted according to the length of the tabletop, and at the same time, the supporting strengthening effect of the table frame on the tabletop is ensured.

[0016] Preferably, a jacking inclined surface is provided on the second cross beam and is inclined along its length direction. A contact block is provided at the suspended end of the first cross beam, and the contact block contacts the jacking inclined surface so that when the telescopic cross beam switches from the contracted state to the extended state, the contact block slides along the jacking inclined surface and the second cross beam is lifted.

[0017] In the above technical solution, when the telescopic cross beam is in the contracted state, the upper end surfaces of the first cross beam and the second cross beam both contact the tabletop to play a supporting role. When the telescopic cross beam switches from the contracted state to the extended state, the contact block slides along the jacking inclined surface. The longer the extended length of the telescopic cross beam is, the lower the height of the position where the jacking inclined surface contacts the contact block is, the higher the height that the second cross beam is lifted is, and the stronger the supporting strength of the second cross beam on the tabletop is. The purpose that the supporting strength of the table frame on the middle position of the tabletop is also enhanced as the length of the telescopic cross beam elongates is achieved, and the problem that the supporting strength of the middle position of the traditional table weakens and the shaking amount becomes larger as the retractable table frame elongates can be solved. Moreover, during the elongation process of the telescopic cross beam, when the telescopic cross beam elongates to any length position, the second cross beam will be lifted by a corresponding height and the supporting effect on the tabletop will be strengthened. Therefore, within the adaptation range of the table frame, the table frame can be adapted according to the length of the tabletop, and at the same time, the supporting strengthening effect of the table frame on the tabletop is ensured.

[0018] Preferably, a plurality of bosses are provided on the first cross beam along its length direction and are distributed in a stepped manner. A contact surface that contacts the upper end surface of the boss and a plurality of avoidance grooves for avoiding the bosses are provided on the second cross beam. When the telescopic cross beam is switched from the contracted state to the extended state, the contact surface is switched from contacting the lower boss to contacting the higher boss, and the second cross beam is lifted. When the telescopic cross beam is in the contracted state, the plurality of bosses are respectively inserted into the plurality of avoidance grooves. When the telescopic cross beam is in the extended state, the contact surface is supported on one of the bosses to lift the second cross beam.

[0019] In the above technical solution, when the telescopic cross beam is in the contracted state, the plurality of bosses are respectively inserted into the plurality of avoidance grooves, and none of the plurality of bosses contacts the contact surface. The upper end surfaces of the first cross beam and the second cross beam both contact the tabletop to play a supporting role. When the telescopic cross beam is switched from the contracted state to a specific extended state, the contact surface is supported on the corresponding boss, and the second cross beam is lifted. The remaining bosses are either located in the avoidance grooves or outside the projection range of the second cross beam and do not interfere with the second cross beam. The longer the extended length of the telescopic cross beam, the higher the height of the upper end surface of the boss that contacts the contact surface, the higher the height that the second cross beam is lifted, and the stronger the supporting strength of the second cross beam on the tabletop. It realizes the purpose that as the length of the telescopic cross beam increases, the supporting strength of the table frame on the middle position of the tabletop also increases, and can solve the problems that the supporting strength of the middle position of the traditional table weakens and the shaking amount becomes larger as the length of the telescopic table frame increases.

[0020] Preferably, a plurality of bosses are provided on the second cross beam along its length direction and are distributed in a stepped manner. A contact surface that contacts the upper end surface of the boss and a plurality of avoidance grooves for avoiding the bosses are provided on the first cross beam. When the telescopic cross beam is switched from the contracted state to the extended state, the contact surface is switched from contacting the lower boss to contacting the higher boss, and the second cross beam is lifted. When the telescopic cross beam is in the contracted state, the plurality of bosses are respectively inserted into the plurality of avoidance grooves. When the telescopic cross beam is in the extended state, one of the bosses is supported on the contact surface to lift the second cross beam.

[0021] In the above technical solution, when the telescopic beam is in a retracted state, the multiple bosses are respectively inserted into the multiple avoidance grooves, and the multiple bosses do not contact the contact surface. The upper end surface of the first beam and the upper end surface of the second beam are in contact with the table top to play a supporting role. When the telescopic beam switches from a retracted state to a specific extended state, the contact surface is supported on the corresponding boss, the second beam is lifted, and the remaining bosses are either located in the avoidance groove or outside the projection range of the first beam, and do not interfere with the first beam. The longer the extended length of the telescopic beam, the lower the height of the lower end surface of the boss in contact with the contact surface, the higher the height of the second beam being lifted, and the stronger the support strength of the second beam to the table top, so as to achieve the purpose of increasing the support strength of the table frame to the middle position of the table top as the length of the telescopic beam is extended, and can solve the problem that the support strength of the middle position of the table is weakened and the shaking amount increases as the telescopic table frame is extended.

[0022] Preferably, the telescopic beams are provided with two beams and are connected side by side between the two leg assemblies, one end of the two first beams are fixed to one of the leg assemblies, and one end of the two second beams are fixed to the other leg assembly; or, one end of the two first beams are respectively fixed to the two leg assemblies, and one end of the two second beams are respectively fixed to the two leg assemblies.

[0023] In the first solution, the two telescopic beams are connected side by side to increase the supporting effect. In the second solution, the second beam can support the table top after being lifted, and the diagonal arrangement of the two second beams can support the table top more evenly, which can avoid the situation where the support strength of one side of the table top not supported by the second beam is insufficient when the two second beams are supported on the same side.

[0024] A table includes a table top and the above-mentioned table frame for the table, wherein the table leg assembly is arranged below the table top, the table leg assembly includes table legs and a support frame fixed to the upper ends of the table legs, the support portion is arranged on the support frame, and the support frame supports the table top through the support portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the table frame in the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the telescopic beam in the present invention. Figure 1 ;

[0027] Figure 3 This is a schematic diagram of the structure of the telescopic beam in the present invention. Figure 2 ;

[0028] Figure 4 It is a structural schematic diagram of the table in the present invention;

[0029] Figure 5 It is a schematic diagram of the partial structure of the telescopic crossbeam in the present invention Figure 1 ;

[0030] Figure 6 It is a schematic diagram of the partial structure of the telescopic crossbeam in the present invention Figure 2 ;

[0031] Figure 7 It is a schematic diagram of the partial structure of the telescopic crossbeam in the present invention Figure 3 ;

[0032] Figure 8 It is a cross-section view of the telescopic crossbeam in the present invention Figure 1 ;

[0033] Figure 9 is Figure 8 a partial enlarged view of the position A in;

[0034] Figure 10 It is a cross-section view of the telescopic crossbeam in the present invention Figure 2 ;

[0035] Figure 11 is Figure 10 a partial enlarged view of the position B in;

[0036] Figure 12 It is a schematic diagram of the structure of the telescopic crossbeam in the present invention Figure 3 ;

[0037] Figure 13 It is a schematic diagram of the partial structure of the telescopic crossbeam in the present invention Figure 4 ;

[0038] Figure 14 It is a schematic diagram of the partial structure of the telescopic crossbeam in the present invention Figure 5 .

[0039] In the figure: the first crossbeam 1, the groove 1.1, the first flanging 1.2, the partition groove 1.3, the upper crossbeam 1.4, the lower crossbeam 1.5, the first arc surface 1.6, the second arc surface 1.7, the second crossbeam 2, the second flanging 2.1, the sliding shaft 2.2, the jacking inclined surface 3, the contact inclined surface 4, the contact block 5, the convex platform 6, the contact surface 7, the avoidance groove 8, the telescopic crossbeam 100, the table leg assembly 200, the table leg 210, the support frame 220, the support part 221, the table board 300. Specific embodiments

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] Embodiment 1:

[0042] As Figures 1 to 4As shown in the figure, a table frame for a table includes two table leg assemblies 200 and a telescopic crossbeam 100 connected between them. The upper parts of the two table leg assemblies 200 have a support portion 221 for supporting the tabletop, and the support portions 221 of the two table leg assemblies 200 are in the same horizontal plane. The telescopic crossbeam 100 includes a first crossbeam 1 and a second crossbeam 2 that are sleeved with each other and can be telescopically relative to each other, so that the telescopic crossbeam 100 can be switched between a contracted state and an extended state with a length greater than the contracted state. The feature is that when the telescopic crossbeam 100 is in the contracted state, the upper end faces of the first crossbeam 1 and the second crossbeam 2 are lower than or flush with the support portion 221. When the telescopic crossbeam 100 is in the extended state, the sleeved portion of the second crossbeam 2 is lifted by the first crossbeam 1 so that the upper end face of the second crossbeam 2 is higher than the support portion 221, for pressing on the tabletop to provide support when the table frame is connected to the tabletop.

[0043] In the above technical solution, one end of the first crossbeam 1 is fixed to one of the table leg assemblies 200, one end of the second crossbeam 2 is fixed to the other table leg assembly 200, and the telescopic crossbeam 100 is relatively close to the middle position of the table board 300. When the telescopic crossbeam 100 is in the extended state, the sleeved part of the second crossbeam 2 is lifted by the first crossbeam 1 so that its upper end is higher than the support part 221, and the upper end surface of the second crossbeam 2 higher than the support part 221 will squeeze the lower end surface of the table board 300, providing support for the table board 300, and the above squeezing force will cause the first crossbeam 1 to produce a slight downward deformation, and the slightly deformed first crossbeam 1 will produce a corresponding reaction force and act on the table board 300, making it less likely for the supported part of the table board 300 and the first crossbeam 1 to undergo further deformation, thereby increasing the support strength of the telescopic crossbeam 100 on the table board 300 at the sleeved position of the telescopic crossbeam 100. When the telescopic crossbeam 100 is in the extended state, the sleeve position of the telescopic crossbeam 100 and the two supporting parts 221 can form a three-point support for the table top 300. Compared with the two-point support formed by the original two supporting parts 221, one supporting point can be added, thereby increasing the support strength of the table frame to the table top 300, and the sleeve position of the telescopic crossbeam 100 is set in the middle of the two supporting parts 221, and the supporting effect of the two supporting parts 221 on the table top 300 is weakest in the middle position of the two supporting parts 221. The sleeve position of the telescopic crossbeam 100 can strengthen the support for the table top 300 at this position, which can solve the problem of insufficient support for the table top in the middle position of the two supporting parts 221. The sleeve position of the telescopic crossbeam 100 is closer to the middle position of the table top 300 than the two supporting parts 221, so the above scheme can increase the support strength of the middle position of the table top 300. In the above technical solution, as the length of the telescopic crossbeam 100 increases, the support strength of the table frame on the middle position of the table board 300 also increases, which can solve the problem that as the telescopic table frame extends, the support strength of the middle position of the table decreases and the shaking increases. In addition, the above technical solution is low in cost, relatively simple and stable in structure, and does not increase the difficulty of installing the table.

[0044] like Figure 12 and Figure 13As shown, a partition groove 1.3 is provided on the first cross beam 1 along its telescopic direction, which is used to partially partition the first cross beam 1 into an upper cross beam 1.4 and a lower cross beam 1.5. One end of the partition groove 1.3 close to the suspended end of the first cross beam 1 is open, and one end of the partition groove 1.3 far from the suspended end of the first cross beam 1 is closed. A sliding shaft 2.2 that can slide along the partition groove 1.3 is fixed on the second cross beam 2. The upper side of the partition groove 1.3 contacts the sliding shaft 2.2. When the sleeved part of the second cross beam 2 is lifted by the lower cross beam 1.5, the sliding shaft 2.2 slides along the partition groove 1.3 and lifts the upper cross beam 1.4, so that the upper end surface of the upper cross beam 1.4 is higher than the support part 221.

[0045] In the above technical solution, when the telescopic cross beam is in the extended state, the sleeved part of the second cross beam is lifted by the first cross beam so that its upper end is higher than the support part, and the sleeved part of the upper cross beam is lifted by the second cross beam so that its upper end surface is higher than the support part. The upper end surfaces of the second cross beam and the upper cross beam that are higher than the support part will squeeze the lower end surface of the table board to provide a supporting effect on the table board. The upper end surfaces of the upper cross beam and the second cross beam are lifted synchronously, and the upper cross beam and the second cross beam support the table board on both sides of the table board at the same time, so that the telescopic cross beam can completely support the table board in the length direction, and the supporting effect can be increased. When the telescopic cross beam is in the extended state, the sleeved position of the telescopic cross beam and the two support parts can form four-point support for the table board. Compared with the two-point support formed by the original two support parts, two support points can be added, thereby increasing the support strength of the table frame for the table board. And the sleeved position of the telescopic cross beam is arranged in the middle of the two support parts, and the supporting effect of the two support parts on the table board is the weakest at the middle position of the two support parts. The sleeved position of the telescopic cross beam can support and strengthen the table board at this position, and the problem of insufficient supporting effect of the middle position of the two support parts on the table board can be solved. The sleeved position of the telescopic cross beam is closer to the middle position of the table board than the two support parts. Therefore, the above solution can increase the support strength of the middle position of the table board.

[0046] Preferably, a groove 1.1 with an open upper part is provided on the first cross beam 1 along its length direction, so that the second cross beam 2 can be placed in the groove 1.1. This structure can make the first cross beam 1 and the second cross beam 2 partially overlap in the height direction, reduce the height dimension of the telescopic cross beam 100, and the second cross beam 2 can be placed in the groove 1.1, which can increase the supporting effect of the first cross beam 1 on the second cross beam 2.

[0047] In one embodiment, the upper end of the first cross beam 1 extends horizontally to form a first flanging 1.2, and the upper end of the second cross beam 2 extends horizontally to form a second flanging 2.1. When the telescopic cross beam 100 is in a contracted state, the upper surfaces of the first flanging 1.2 and the second flanging 2.1 are flush with the support portion 221. When the telescopic cross beam 100 is in an extended state, the second flanging 2.1 is lifted by the first cross beam 1 so that the upper end of the second flanging 2.1 is higher than the first flanging 1.2.

[0048] In the above technical solution, the first flanging 1.2 and the second flanging 2.1 can increase the contact area between the telescopic cross beam 100 and the table board 300, reduce the damage to the lower end surface of the table board 300 caused by the supporting effect, reduce the deformation of the lower end surface of the table board 300, can increase the supporting effect, and the convenient structure can increase the structural strength of the first cross beam 1 and the second cross beam 2, further increasing the supporting effect.

[0049] Preferably, the first flanging 1.2 and the second flanging 2.1 are respectively located on both sides of the telescopic cross beam 100 in the width direction. This structure can increase the stability of the support, and the two flangings are respectively located on both sides of the telescopic cross beam 100 without interfering with each other.

[0050] Preferably, both the first flanging 1.2 and the second flanging 2.1 extend outward from the outer side of the groove 1.1.

[0051] Preferably, scales are provided on the first cross beam 1 and the second cross beam 2, which can make the length dimension of the table frame more intuitive.

[0052] It can be understood that in one embodiment, the telescopic cross beam 100 is connected unilaterally on the same side between the table leg assemblies 200, and the connection between the telescopic cross beam 100 and the table leg assemblies 200 is simple.

[0053] It can be understood that in another embodiment, the telescopic cross beam is connected diagonally unilaterally between the table leg assemblies. Connecting the telescopic cross beam diagonally between the table leg assemblies can make the telescopic cross beam as close as possible to the middle position of the table board, increasing the supporting effect.

[0054] It can be understood that in another embodiment, there are two telescopic cross beams and they are connected side by side between two table leg assemblies. One ends of the two first cross beams are both fixed to one of the table leg assemblies, and one ends of the two second cross beams are both fixed to the other table leg assembly 200. Connecting the two telescopic cross beams side by side can increase the supporting effect.

[0055] It can be understood that in another embodiment, one end of each of the two first crossbeams is fixedly connected to two table leg assemblies respectively, and one end of each of the two second crossbeams is fixedly connected to two table leg assemblies respectively. In the above technical solution, after the second crossbeam is lifted, it can support the tabletop. The diagonal arrangement of the two second crossbeams can support the tabletop more evenly, and can avoid the situation that when the two second crossbeams support on the same side, the supporting strength of one side of the tabletop not supported by the second crossbeam is insufficient.

[0056] It can be understood that in one embodiment, the telescopic crossbeam includes a first crossbeam and a second crossbeam.

[0057] It can be understood that in another embodiment, the telescopic crossbeam includes two first crossbeams and a second crossbeam. The two first crossbeams are respectively connected to two table leg assemblies. The two ends of the second crossbeam are respectively connected to the two first crossbeams.

[0058] Embodiment 2:

[0059] As Figure 12 and Figure 14 shown, on the basis of Embodiment 1, the width of the partition groove 1.3 decreases from the closed end to the open end of the partition groove 1.3, and the upper end surface of the lower crossbeam 1.5 is inclined. The height of the upper end surface of the lower crossbeam 1.5 increases from the side close to the fixed end of the first crossbeam 1 to the other side. The sliding shaft 2.2 contacts the upper end surface of the lower crossbeam 1.5. When the telescopic crossbeam 100 switches from the contracted state to the extended state, the sliding shaft 2.2 slides along the partition groove 1.3 and is lifted by the upper end surface of the lower crossbeam 1.5, so that the second crossbeam 2 is lifted. While the sliding shaft 2.2 is lifted, the upper crossbeam 1.4 is lifted. In this embodiment, the upper side surface of the partition groove 1.3 is equivalent to the upper end surface of the lower crossbeam 1.5.

[0060] In the above technical solution, when the telescopic beam 100 switches from a contracted state to an extended state, the sliding shaft 2.2 slides along the partition groove 1.3, and while the sliding shaft 2.2 slides, it is lifted by the upper end surface of the lower beam 1.5, and the upper end surface of the second beam 2 is synchronously lifted to support the table top 300. Since the width of the partition groove 1.3 decreases from the closed end to the open end of the partition groove 1.3, the lifted sliding shaft 2.2 can lift the upper beam 1.4 through the lower end surface of the upper beam 1.4, so that the upper end surface of the upper beam 1.4 is higher than the supporting portion 221, which can apply pressure to the table top 300 to provide support. The partition groove 1.3 has multiple functions: first, the upper end surface of the upper crossbeam 1.4 (i.e., the lower end surface of the partition groove 1.3) has a guiding and supporting function, and when the telescopic crossbeam 100 switches from a contracted state to an extended state, the upper end surface of the second crossbeam 2 can be lifted to squeeze the lower end surface of the table top 300, thereby strengthening the support for the table top 300; second, the partition groove 1.3 divides the first crossbeam 1 into an upper crossbeam 1.4 and a lower crossbeam 1.5, and the lower crossbeam 1.5 can provide support during the telescopic process, and the upper crossbeam 1.4 can be used in the sliding state. Under the action of the shaft 2.2, the table top 300 is deformed upward to provide support. When the telescopic beam 100 is in the extended state, the table top 300 on one side of the first beam 1 can also be supported by the upper beam 1.4, thereby increasing the supporting effect on this side. Fourth, during the extension process of the telescopic beam 100, the telescopic beam 100 can stop at any length position and can be adapted according to the length of the table top 300. Fifth, multiple functions can be realized by providing only one partition groove 1.3, which does not greatly increase the processing difficulty of the first beam 1 and can reduce the processing cost as much as possible. During the sliding process of the sliding shaft 2.2 along the partition groove 1.3, the longer the extension length of the telescopic beam 100 is, the higher the height of the second beam 2 and the upper beam 1.4 being lifted, and the higher the height of the lifted second beam 2 and the upper beam 1.4 above the support portion 221, the stronger the support strength of the second beam 2 and the upper beam 1.4 on the table top 300 is, so that the support strength of the table frame on the middle position of the table top 300 is enhanced as the length of the telescopic beam 100 is extended, and the problem that the support strength of the middle position of the table is weakened and the shaking amount is increased as the telescopic table frame is extended in the traditional table can be solved. In addition, during the extension process of the telescopic beam 100, when the telescopic beam 100 is extended to any length position, the second beam 2 will be lifted to a corresponding height and strengthen the support for the table top 300. Therefore, within the adaptation range of the table frame, the table frame can be adapted according to the length of the table top 300, and at the same time, the support and strengthening effect of the table frame on the table top 300 is guaranteed.

[0061] Embodiment 3:

[0062] like Figure 13 and Figure 14As shown, based on Embodiment 1 or 2, the upper end surface of the upper crossbeam 1.4 is a first arc surface 1.6. The height of the first arc surface 1.6 on the side close to the suspended end of the first crossbeam 1 is lower than the height of the first arc surface 1.6 on the side close to the fixed end of the first crossbeam 1. The lower end surface of the upper crossbeam 1.4 is a second arc surface 1.7 adapted to the first arc surface 1.6, so that the thickness of the upper crossbeam 1.4 is the same at each position in its length direction. The axes of the first arc surface 1.6 and the second arc surface 1.7 are located below the upper crossbeam 1.4.

[0063] In the above technical solution, when the middle position of the upper crossbeam 1.4 is lifted by the sliding shaft 2.2, a simple lever structure is formed between the upper crossbeam 1.4 and the sliding shaft 2.2. The suspended end of the upper crossbeam 1.4 will also rise, and the rising height is higher than the rising height of the middle position of the upper crossbeam 1.4. The first arc surface 1.6 can offset the rising height of the suspended end, and can prevent the suspended end of the upper crossbeam 1.4 from contacting the tabletop 300, so that the supported position of the upper crossbeam 1.4 and the position between the supported position and the upper crossbeam 1.4 can squeeze the tabletop 300 to form a support for the tabletop 300, while the tabletop 300 near the suspended end of the upper crossbeam 1.4 is supported by the upper end surface of the second crossbeam 2. The thickness of the upper crossbeam is the same at each position in its length direction. The height of the upper end surface of the upper crossbeam being higher than that of the support part and the height of the upper end surface of the second crossbeam being higher than that of the support part are both determined by the inclination amount of the upper end surface of the lower crossbeam. The protruding heights of the two are the same, and they can form similar supporting forces on the tabletop and are not likely to interfere with each other.

[0064] Embodiment 4:

[0065] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, based on Embodiment 1, a jacking inclined surface 3 is provided on the lower crossbeam 1.5 and is inclined along its length direction. A contact inclined surface 4 is provided on the second crossbeam 2 and is inclined along its length direction. The inclination directions of the jacking inclined surface 3 and the contact inclined surface 4 are the same. The jacking inclined surface 3 is located below the contact inclined surface 4. The contact inclined surface 4 is adapted to and contacts the jacking inclined surface 3. When the telescopic crossbeam 100 is in the retracted state, the high end of the jacking inclined surface 3 contacts the high end of the contact inclined surface 4, and the low end of the jacking inclined surface 3 contacts the low end of the contact inclined surface 4. When the telescopic crossbeam 100 is switched from the retracted state to the extended state, the contact inclined surface 4 slides along the jacking inclined surface 3, so that the low end of the second crossbeam 2 moves towards the high end of the first crossbeam 1 and they are mutually squeezed, so that the second crossbeam 2 is lifted.

[0066] In the above technical solution, the lower end of the lifting slope 3 refers to the end of the lifting slope 3 with a relatively low height, the higher end of the lifting slope 3 refers to the end of the lifting slope 3 with a relatively high height, the lower end of the contact slope 4 refers to the end of the contact slope 4 with a relatively low height, and the higher end of the contact slope 4 refers to the end of the contact slope 4 with a relatively high height. When the telescopic beam 100 is in a retracted state, the higher end of the first beam 1 contacts the higher end of the second beam 2, and the lower end of the first beam 1 contacts the lower end of the second beam 2, which can play a role of avoidance and prevent the upper end surface of the second beam 2 from being higher than the support portion 221. In the retracted state, the upper end of the first beam 1 and the upper end surface of the second beam 2 are both in contact with the table top 300 and play a supporting role. When the telescopic beam 100 switches from the contracted state to the extended state, the contact slope 4 slides along the lifting slope 3. The longer the extension length of the telescopic beam 100 is, the higher the height of the second beam 2 being lifted, and the higher the height of the lifted second beam 2 above the support portion 221 is, the stronger the support strength of the second beam 2 on the table board 300 is, so that the support strength of the table frame on the middle position of the table board 300 is enhanced as the length of the telescopic beam 100 is extended, which can solve the problem that the support strength of the middle position of the table is weakened and the shaking amount increases as the telescopic table frame is extended in the traditional table. In addition, during the extension process of the telescopic beam 100, when the telescopic beam 100 is extended to any length position, the second beam 2 will be lifted to a corresponding height and strengthen the support for the table board 300. Therefore, within the adaptation range of the table frame, the table frame can be adapted according to the length of the table board 300, and at the same time, the support and strengthening effect of the table frame on the table board 300 is guaranteed.

[0067] Embodiment 5:

[0068] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, on the basis of Example 1, the lower beam 1.5 is provided with a lifting slope 3 inclined along its length direction, and the suspended end of the second beam 2 is provided with a contact block 5, and the contact block 5 is in contact with the lifting slope 3, so that when the telescopic beam 100 switches from the contracted state to the extended state, the contact block 5 slides along the lifting slope 3 and lifts the second beam 2.

[0069] In the above technical solution, the suspended end of the second beam 2 refers to the end of the second beam 2 that is not fixed to the table leg assembly 200. The contact block 5 is arranged above the jacking slope 3. When the telescopic beam 100 is in the retracted state, the upper end surface of the first beam 1 and the upper end surface of the second beam 2 are in contact with the table board 300 to play a supporting role. When the telescopic beam 100 switches from the retracted state to the extended state, the contact block 5 slides along the jacking slope 3. The longer the extension length of the telescopic beam 100 is, the higher the height of the position where the jacking slope 3 contacts the contact block 5 is, the higher the height of the contact block 5 and the second beam 2 is lifted, and the stronger the support strength of the second beam 2 to the table board 300 is, so as to achieve the purpose of increasing the support strength of the table frame to the middle position of the table board 300 as the length of the telescopic beam 100 is extended, and can solve the problem that the support strength of the middle position of the table is weakened and the shaking amount is increased as the telescopic table frame is extended. During the extension process of the telescopic beam 100 , the telescopic beam 100 can stop at any length position and can be adapted according to the length of the table top 300 .

[0070] Preferably, an avoidance space is provided on the second crossbeam 2 to prevent the structures other than the contact block 5 from interfering with the first crossbeam 1 when the second crossbeam 2 slides relative to the first crossbeam 1 .

[0071] Embodiment 6:

[0072] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, on the basis of Example 1, a lifting slope 3 is provided on the second crossbeam 2 and is inclined along its length direction, and a contact block 5 is provided at the suspended end of the lower crossbeam 1.5, and the contact block 5 is in contact with the lifting slope 3, so that when the telescopic crossbeam 100 switches from a contracted state to an extended state, the contact block 5 slides along the lifting slope 3 and lifts the second crossbeam 2.

[0073] In the above technical solution, the suspended end of the first cross beam 1 refers to the end of the first cross beam 1 that is not fixed to the table leg assembly 200. When the telescopic cross beam 100 is in the contracted state, the upper end surfaces of both the first cross beam 1 and the second cross beam 2 are in contact with the tabletop 300 to play a supporting role. When the telescopic cross beam 100 switches from the contracted state to the extended state, the contact block 5 slides along the lifting inclined surface 3. The longer the extended length of the telescopic cross beam 100, the lower the height of the position where the lifting inclined surface 3 contacts the contact block 5, the higher the height that the second cross beam 2 is lifted, and the stronger the supporting strength of the second cross beam 2 on the tabletop 300. It achieves the purpose that as the length of the telescopic cross beam 100 increases, the supporting strength of the table frame on the middle position of the tabletop 300 also increases, and it can solve the problem that in traditional tables, as the retractable table frame extends, the supporting strength of the middle position of the table weakens and the shaking amount becomes larger. Moreover, during the extension process of the above telescopic cross beam 100, when the telescopic cross beam 100 extends to any length position, the second cross beam 2 will be lifted by a corresponding height and strengthen the supporting effect on the tabletop 300. Therefore, within the adaptation range of the table frame, the table frame can be adapted according to the length of the tabletop 300, and at the same time, ensure the strengthening effect of the table frame on the support of the tabletop 300.

[0074] Preferably, an avoidance space is provided on the first cross beam 1 to avoid interference between the structure other than the contact block 5 and the second cross beam 2 when the first cross beam 1 slides relative to the second cross beam 2.

[0075] Embodiment 7:

[0076] As Figures 1 to 4 、 Figures 8 to 11 shown, on the basis of Embodiment 1, a plurality of bosses 6 distributed in a stepped manner are provided on the lower cross beam 1.5 along its length direction. A contact surface 7 that contacts the upper end surface of the boss 6 and a plurality of avoidance grooves 8 for avoiding the boss 6 are provided on the second cross beam 2, so that when the telescopic cross beam 100 switches from the contracted state to the extended state, the contact surface 7 switches from contacting the lower boss 6 to contacting the higher boss 6, and the second cross beam 2 is lifted. When the telescopic cross beam 100 is in the contracted state, the plurality of bosses 6 are respectively inserted into the corresponding plurality of avoidance grooves 8. When the telescopic cross beam 100 is in the extended state, the contact surface 7 supports on one of the bosses 6 to lift the second cross beam 2.

[0077] In the above technical solution, the suspended end of the first cross beam 1 refers to the end of the first cross beam 1 that is not fixed to the table leg assembly 200. When the telescopic cross beam 100 is in the contracted state, the plurality of bosses 6 are respectively inserted into the plurality of avoidance grooves 8, and none of the plurality of bosses 6 contacts the contact surface 7. The upper end surfaces of the first cross beam 1 and the second cross beam 2 are both in contact with the tabletop 300 to play a supporting role. When the telescopic cross beam 100 switches from the contracted state to a specific extended state, the contact surface 7 supports on the corresponding boss 6, the second cross beam 2 is lifted, and the remaining bosses 6 are either located in the avoidance grooves 8 or outside the projection range of the second cross beam 2, without interfering with the second cross beam 2. The longer the extended length of the telescopic cross beam 100, the higher the height of the upper end surface of the boss 6 in contact with the contact surface 7, the higher the height that the second cross beam 2 is lifted, and the stronger the supporting strength of the second cross beam 2 for the tabletop 300. It realizes the purpose that as the length of the telescopic cross beam 100 increases, the supporting strength of the table frame for the middle position of the tabletop 300 also increases, and can solve the problems that the supporting strength of the middle position of the traditional table weakens and the shaking amount becomes larger as the telescopic table frame extends.

[0078] It can be understood that in one embodiment, the intervals between adjacent bosses 6 are the same, which is convenient for the bosses 6 to enter the respective avoidance grooves 8 for avoidance.

[0079] It can be understood that in another embodiment, the intervals between adjacent bosses 6 are different, but when one of the bosses 6 contacts the contact surface 7, avoidance grooves 8 are provided at the corresponding positions of the second cross beam 2 and the other bosses 6 located below the second cross beam 2 for avoiding the rib.

[0080] It can be understood that in another embodiment, the intervals between adjacent bosses 6 are different, and the avoidance grooves 8 are long grooves arranged along the length direction of the second cross beam 2. When one of the bosses 6 contacts the contact surface 7, the other bosses 6 located below the second cross beam 2 are all arranged in the avoidance grooves 8.

[0081] Embodiment 8:

[0082] On the basis of Embodiment 1, a plurality of bosses are arranged in a stepped manner along the length direction of the second cross beam, a contact surface that contacts the upper end surface of the boss and a plurality of avoidance grooves for avoiding the boss are provided on the lower cross beam, so that when the telescopic cross beam switches from the contracted state to the extended state, the contact surface switches from contacting the lower boss to contacting the higher boss, and the second cross beam is lifted. When the telescopic cross beam is in the contracted state, the plurality of bosses are respectively inserted into the corresponding plurality of avoidance grooves. When the telescopic cross beam is in the extended state, one of the bosses supports on the contact surface to lift the second cross beam.

[0083] In the above technical solution, when the telescopic beam is in a retracted state, the multiple bosses are respectively inserted into the multiple avoidance grooves, and the multiple bosses do not contact the contact surface. The upper end surface of the first beam and the upper end surface of the second beam are in contact with the table top to play a supporting role. When the telescopic beam switches from a retracted state to a specific extended state, the contact surface is supported on the corresponding boss, the second beam is lifted, and the remaining bosses are either located in the avoidance groove or outside the projection range of the first beam, and do not interfere with the first beam. The longer the extended length of the telescopic beam, the lower the height of the lower end surface of the boss in contact with the contact surface, the higher the height of the second beam being lifted, and the stronger the support strength of the second beam to the table top, so as to achieve the purpose of increasing the support strength of the table frame to the middle position of the table top as the length of the telescopic beam is extended, and can solve the problem that the support strength of the middle position of the table is weakened and the shaking amount increases as the telescopic table frame is extended.

[0084] Embodiment 9:

[0085] like Figure 1 and Figure 4 As shown, a table includes a table top 300 and a table frame for the table as described in the above embodiment, wherein the table leg assembly 200 is arranged below the table top 300, and the table leg assembly 200 includes a table leg 210 and a support frame 220 fixed to the upper end of the table leg 210, and the support portion 221 is arranged on the support frame 220, and the support frame 220 supports the table top 300 through the support portion 221.

[0086] The beneficial effects of the present invention are: simple structure and low manufacturing cost; simple disassembly and assembly method and high disassembly and assembly efficiency; no damage to the surface of the spring; and adaptability to the disassembly and assembly of energy storage springs of different sizes.

Claims

1. A table frame for a table, comprising two table leg assemblies and a telescopic cross beam connected between the two. The upper parts of the two table leg assemblies have support parts for supporting a tabletop, and the support parts of the two table leg assemblies are in the same horizontal plane. The telescopic cross beam includes a first cross beam and a second cross beam that are sleeved with each other and can telescopically move relative to each other, so that the telescopic cross beam can be switched between a contracted state and an extended state with a length greater than the contracted state. The upper end of the first cross beam extends horizontally to form a first flange, and the upper end of the second cross beam extends horizontally to form a second flange, characterized in that, A partition groove is provided on the first crossbeam along its telescopic direction, which is used to divide the first crossbeam into an upper crossbeam and a lower crossbeam. When the telescopic crossbeam is in a retracted state, the upper end surfaces of the upper crossbeam and the second crossbeam are lower than or flush with the support portion. When the telescopic crossbeam is in an extended state, the sleeved portion of the second crossbeam is lifted by the lower crossbeam so that its upper end surface is higher than the support portion, and the sleeved portion of the upper crossbeam is lifted by the second crossbeam so that its upper end surface is higher than the support portion, so as to apply pressure to the table top to provide support when the table frame is connected to the table top; The partition groove is open at one end close to the suspended end of the first beam, and closed at one end away from the suspended end of the first beam. A sliding shaft that can slide along the partition groove is fixed on the second beam, and the upper side surface of the partition groove is in contact with the sliding shaft. When the socket part of the second beam is lifted by the lower beam, the sliding shaft lifts the upper beam.

2. The table frame for a table according to claim 1, characterized in that, The width of the partition groove decreases from the closed end to the open end of the partition groove, and the upper end face of the lower beam is inclined. The height of the upper end face of the lower beam increases from one side close to the fixed end of the first beam to the other side. The sliding shaft contacts the upper end face of the lower beam. When the telescopic beam switches from a contracted state to an extended state, the sliding shaft slides along the partition groove and is lifted by the upper end face of the lower beam to lift the second beam. When the sliding shaft is lifted, the upper beam is lifted at the same time.

3. A table frame for a table according to claim 1, characterized in that, The upper end face of the upper crossbeam is a first arc surface, the height of the first arc surface close to the suspended end of the first crossbeam is lower than the height of the first arc surface close to the fixed end of the first crossbeam, and the upper side face of the partition groove is a second arc surface adapted to the first arc surface, so that the thickness of the upper crossbeam at each position in its length direction is the same.

4. A table frame for a table according to claim 1, characterized in that, The first crossbeam is provided with a lifting slope inclined along its length direction, and the second crossbeam is provided with a contact slope inclined along its length direction, the contact slope is adapted to and in contact with the lifting slope, when the telescopic crossbeam is in a retracted state, the high end of the lifting slope contacts the high end of the contact slope, and the low end of the lifting slope contacts the low end of the contact slope, when the telescopic crossbeam switches from a retracted state to an extended state, the contact slope slides along the lifting slope to move the low end of the second crossbeam toward the high end of the first crossbeam, so that the second crossbeam is lifted.

5. A table frame for a table according to claim 1, characterized in that, The first beam is provided with a lifting slope inclined along its length direction, and the suspended end of the second beam is provided with a contact block, which contacts the lifting slope so that when the telescopic beam switches from a contracted state to an extended state, the contact block slides along the lifting slope and lifts the second beam.

6. The table frame for a table according to claim 1, characterized in that, The second beam is provided with a lifting slope inclined along its length direction, and the suspended end of the first beam is provided with a contact block, which contacts the lifting slope so that when the telescopic beam switches from a contracted state to an extended state, the contact block slides along the lifting slope and lifts the second beam.

7. The table frame for a table according to claim 1, characterized in that, A plurality of bosses are arranged on the first cross beam in a stepped distribution along its length direction. A contact surface that contacts the upper end surface of the boss and a plurality of avoidance grooves for avoiding the bosses are arranged on the second cross beam. When the telescopic cross beam is switched from the contracted state to the extended state, the contact surface is switched from contacting the lower boss to contacting the higher boss, and the second cross beam is lifted. When the telescopic cross beam is in the contracted state, the plurality of bosses are respectively inserted into the plurality of avoidance grooves. When the telescopic cross beam is in the extended state, the contact surface supports on one of the bosses to lift the second cross beam.

8. A table frame for a table according to claim 1, characterized in that, A plurality of bosses are arranged on the second cross beam in a stepped distribution along its length direction. A contact surface that contacts the upper end surface of the boss and a plurality of avoidance grooves for avoiding the bosses are arranged on the first cross beam. When the telescopic cross beam is switched from the contracted state to the extended state, the contact surface is switched from contacting the lower boss to contacting the higher boss, and the second cross beam is lifted. When the telescopic cross beam is in the contracted state, the plurality of bosses are respectively inserted into the plurality of avoidance grooves. When the telescopic cross beam is in the extended state, one of the bosses supports on the contact surface to lift the second cross beam.

9. A table, comprising a tabletop, characterized in that, It further includes a table frame for a table according to any one of claims 1 to 8. The table leg assembly is arranged under the tabletop. The table leg assembly includes table legs and a support frame fixed to the upper ends of the table legs. The support part is arranged on the support frame, and the support frame supports the tabletop through the support part.

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