A table frame and table

Abstract

The application discloses a table frame and a table, which comprises two table leg assemblies and a telescopic cross beam connected between the two table leg assemblies. The upper part of the two table leg assemblies is provided with a supporting part for supporting a table board. The telescopic cross beam comprises a first cross beam and a second cross beam which are sleeved with each other and can be telescopically extended 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 that of the contracted state. In the contracted state, the upper end surface of the first cross beam and the second cross beam is lower than or flush with the supporting part. In the extended state, the sleeved part of the second cross beam is lifted by the first cross beam, so that the upper end surface of the second cross beam is higher than the supporting part, and the telescopic cross beam can provide support by pressing the table board when the table frame is connected with the table board. The above technical scheme can solve the problem that in the conventional table, the supporting strength of the middle position of the table is weakened and the shaking amount is increased with the extension of the telescopic table frame.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of furniture, in particular to a table frame for a table and the table. BACKGROUND

[0002] A conventional lifting table generally comprises a table board and a table frame, the table frame comprising two table leg assemblies and a telescopic cross beam connected between the two table leg assemblies, the table frame being able to adapt to table boards of different lengths through the telescopic action of the telescopic cross beam. However, as the telescopic cross beam is lengthened, the support strength of the table frame at the middle position of the table board will be weakened, resulting in that the shaking amount of the table will also be increased. SUMMARY

[0003] In order to overcome the deficiency in the prior art that the support strength of the table frame at the middle position of the table board will be weakened as the telescopic cross beam is lengthened, the present application provides a table frame for a table, in the extended state of the telescopic cross beam, the sleeving position of the telescopic cross beam is lifted and presses the table board, so as to increase the support strength of the telescopic cross beam to the table board.

[0004] In order to achieve the above-mentioned purpose, the present application 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 table leg assemblies, the upper part of the two table leg assemblies having a support part for supporting a table board, and the support parts of the two table leg assemblies being in the same horizontal plane, the telescopic cross beam comprising a first cross beam and a second cross beam that are sleeved with each other and can be telescopically extended 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 that of the contracted state, in the contracted state of the telescopic cross beam, the upper end surface of the first cross beam and the second cross beam is lower than or flush with the support part, in the extended state of the telescopic cross beam, the sleeving position of the second cross beam is lifted by the first cross beam so that the upper end surface thereof is higher than the support part, for pressing the table board and providing support when the table frame is connected to the table board.

[0006] In the technical scheme, when the telescopic cross beam is in the stretched state, the sleeving position of the telescopic cross beam and the two supporting portions can form three-point support for the table board, and compared with the two-point support formed by the original two supporting portions, one supporting point is added, thereby increasing the supporting strength of the table frame for the table board. In the table frame structure in which the two supporting portions support the table board, the middle position of the two supporting portions is far away from the two supporting portions, and therefore, the supporting effect of the table frame for the table board at the middle position of the two supporting portions is the weakest. In the present scheme, the sleeving position of the telescopic cross beam is the middle position of the two supporting portions, and the upper end surface of the second cross beam is higher than the supporting portions, thereby strengthening the support for the table board at the middle position. The problem of insufficient support for the table board at the middle position of the two supporting portions can be solved. The sleeving position of the telescopic cross beam is closer to the middle position of the table board relative to the two supporting portions, and therefore, the supporting strength of the middle position of the table board can be increased by the above scheme. In the technical scheme, as the length of the telescopic cross beam is increased, the supporting strength of the middle position of the table board by the table frame is also increased, and the problem of weakened supporting strength of the middle position of the table board and increased shaking of the table as the length of the telescopic table frame is increased in the traditional table can be solved. The technical scheme has low implementation cost, relatively simple and stable structure, and does not increase the installation difficulty of the table.

[0007] Preferably, the first cross beam is provided with a jacking inclined surface arranged along the length direction of the first cross beam, the second cross beam is provided with a contact inclined surface arranged along the length direction of the second cross beam, the contact inclined surface is matched with and contacts the jacking inclined surface, when the telescopic cross beam 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 cross beam is switched from the contracted state to the stretched state, the contact inclined surface slides along the jacking inclined surface, so that the low end of the second cross beam moves to the high end of the first cross beam, and the second cross beam is lifted.

[0008] In the technical scheme, when the telescopic cross beam is in the contracted state, the high end of the first cross beam is in contact with the high end of the second cross beam, and the low end of the first cross beam is in contact with the low end of the second cross beam, so that the avoidance effect can be achieved, and the upper end surface of the second cross beam is prevented from being higher than the support part, and in the contracted state, the upper end of the first cross beam and the upper end surface of the second cross beam are in contact with the table board and play a supporting role. When the telescopic cross beam is switched from the contracted state to the stretched state, the contact inclined surface slides along the jacking inclined surface, the telescopic cross beam has a longer extension length, the second cross beam is lifted to a higher height, the second cross beam is higher than the height of the support part, and the supporting strength of the second cross beam to the table board is stronger, so that the purpose that the supporting strength of the table frame to the middle position of the table board is increased with the extension of the telescopic cross beam is achieved, and the problem that the supporting strength of the middle position of the table is weakened and the shaking amount is increased with the extension of the telescopic table frame in the traditional table is solved.

[0009] In the existing table fixing structure, the longer the length of the table board is, the weaker the supporting strength of the table frame to the middle position of the table board is, and therefore, the greater the supporting strength that the telescopic cross beam needs to increase is. In the present application, the longer the length of the table board is, the longer the extension length of the corresponding telescopic cross beam is, the higher the height of the upper end surface of the second cross beam above the support part is, and the greater the pressure of the sleeving part on the table board is, and the greater the supporting force of the sleeving part to the table board is. When the length of the table board is small, the extension length of the telescopic cross beam is small, and the installation of the table board and the table frame is not affected too much; when the length of the table board is large, the extension length of the telescopic cross beam is large, the height of the upper end surface of the second cross beam above the support part is high, and the supporting force generated is large, so that the table board can be provided with appropriate supporting and strengthening effect. Within the adaptive range of the table frame, the table frame can be adapted according to the length of the table board, and the supporting and strengthening effect of the table frame to the table board is ensured at the same time.

[0010] Preferably, the first cross beam is provided with a jacking inclined surface inclined along the length direction thereof, the overhanging end of the second cross beam is provided with a contact block, the contact block is in contact with the jacking inclined surface, so that when the telescopic cross beam is switched from the contracted state to the stretched state, the contact block slides along the jacking inclined surface, and the second cross beam is lifted.

[0011] In the technical scheme, when the telescopic cross beam is in the contracted state, the upper end surface of the first cross beam and the upper end surface of the second cross beam are in contact with the table board to play a supporting role. When the telescopic cross beam is switched from the contracted state to the stretched state, the contact block slides along the jacking slope, the longer the extension length of the telescopic cross beam is, the higher the height of the position where the jacking slope is in contact with the contact block is, the higher the contact block and the second cross beam are lifted, and the stronger the supporting strength of the second cross beam to the table board is, so that the supporting strength of the table frame to the middle position of the table board is also enhanced along with the extension of the telescopic cross beam, and the problem that the supporting strength of the middle position of the table is weakened and the shaking amount is increased along with the extension of the telescopic table frame of the traditional table is solved. In the extension process of the telescopic cross beam, when the telescopic cross beam is extended to any length position, the second cross beam is lifted by a corresponding height and the supporting role to the table board is strengthened, so that the table frame can be adapted to the length of the table board within the adaptation range of the table frame, and the supporting strengthening role of the table frame to the table board is ensured.

[0012] Preferably, the second cross beam is provided with a jacking slope obliquely arranged along the length direction thereof, and the overhanging end of the first cross beam is provided with a contact block in contact with the jacking slope, so that when the telescopic cross beam is switched from the contracted state to the stretched state, the contact block slides along the jacking slope and lifts the second cross beam.

[0013] In the technical scheme, when the telescopic cross beam is in the contracted state, the upper end surface of the first cross beam and the upper end surface of the second cross beam are in contact with the table board to play a supporting role. When the telescopic cross beam is switched from the contracted state to the stretched state, the contact block slides along the jacking slope, the longer the extension length of the telescopic cross beam is, the lower the height of the position where the jacking slope is in contact with the contact block is, the higher the contact block and the second cross beam are lifted, and the stronger the supporting strength of the second cross beam to the table board is, so that the supporting strength of the table frame to the middle position of the table board is also enhanced along with the extension of the telescopic cross beam, and the problem that the supporting strength of the middle position of the traditional table is weakened and the shaking amount is increased along with the extension of the telescopic table frame is solved. In the extension process of the telescopic cross beam, when the telescopic cross beam is extended to any length position, the second cross beam is lifted by a corresponding height and the supporting role to the table board is strengthened, so that the table frame can be adapted to the length of the table board within the adaptation range of the table frame, and the supporting strengthening role of the table frame to the table board is ensured.

[0014] As preferred, the first cross beam is provided with a plurality of steps distributed in a stepped manner along the length direction thereof, and the second cross beam is provided with a plurality of contact surfaces in contact with the upper end surfaces of the steps and a plurality of avoiding grooves for avoiding the steps, so that when the telescopic cross beam is switched from the contracted state to the expanded state, the contact surfaces are switched from being in contact with the lower steps to being in contact with the higher steps, and the second cross beam is lifted, the plurality of steps are respectively inserted into the plurality of avoiding grooves when the telescopic cross beam is in the contracted state, and one of the steps is supported on the contact surface to lift the second cross beam when the telescopic cross beam is in the expanded state.

[0015] In the above technical solution, when the telescopic cross beam is in the contracted state, the plurality of steps are respectively inserted into the plurality of avoiding grooves, and none of the steps is in contact with the contact surface, and the upper end surface of the first cross beam and the upper end surface of the second cross beam are both in contact with the table board to play a supporting role. When the telescopic cross beam is switched from the contracted state to a specific expanded state, the contact surface is supported on the corresponding step, and the second cross beam is lifted, and the remaining steps are either located in the avoiding grooves or located outside the projection range of the second cross beam, and do not interfere with the second cross beam. The longer the telescopic cross beam is extended, the higher the upper end surface of the step in contact with the contact surface is, the higher the second cross beam is lifted, and the stronger the supporting strength of the second cross beam to the table board is, thereby achieving the purpose that as the length of the telescopic cross beam is extended, the supporting strength of the table frame to the middle position of the table board is also enhanced, and the problem that the supporting strength of the middle position of the traditional table is weakened and the shaking amount is increased as the telescopic cross beam is extended can be solved.

[0016] As preferred, the first cross beam is provided with a plurality of steps distributed in a stepped manner along the length direction thereof, and the second cross beam is provided with a plurality of contact surfaces in contact with the upper end surfaces of the steps and a plurality of avoiding grooves for avoiding the steps, so that when the telescopic cross beam is switched from the contracted state to the expanded state, the contact surfaces are switched from being in contact with the lower steps to being in contact with the higher steps, and the second cross beam is lifted, the plurality of steps are respectively inserted into the plurality of avoiding grooves when the telescopic cross beam is in the contracted state, and one of the steps is supported on the contact surface to lift the second cross beam when the telescopic cross beam is in the expanded state.

[0017] In the technical scheme, when the telescopic cross beam is in the contracted state, the plurality of bosses are respectively inserted into the plurality of avoiding grooves, none of the plurality of bosses is in contact with the contact surface, and the upper end surfaces of the first cross beam and the second cross beam are in contact with the table board 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, the second cross beam is lifted, and the remaining bosses are either located in the avoiding grooves or are located outside the projection range of the first cross beam and do not interfere with the first cross beam. The longer the extension length of the telescopic cross beam is, the lower the lower end surface height of the boss in contact with the contact surface is, the higher the lifting height of the second cross beam is lifted, and the stronger the supporting strength of the second cross beam to the table board is, thereby achieving the purpose that as the length of the telescopic cross beam is extended, the supporting strength of the table frame to the middle position of the table board is also enhanced, and the problem that the supporting strength of the middle position of the traditional table is weakened and the shaking amount is increased as the telescopic table frame is extended can be solved.

[0018] Preferably, a groove is arranged on the first cross beam in the length direction of the first cross beam and is open upward, so that the second cross beam can be placed in the groove. The structure can make the first cross beam and the second cross beam partially overlap in the height direction, reduce the height dimension of the telescopic cross beam, and the second cross beam can be placed in the groove, so that the supporting effect of the first cross beam on the second cross beam can be increased.

[0019] Preferably, the upper end of the first cross beam extends transversely to form a first flange, the upper end of the second cross beam extends transversely to form a second flange, the upper surfaces of the first flange and the second flange are flush with the support portion in the contracted state of the telescopic cross beam, and the second flange is lifted by the first cross beam in the extended state of the telescopic cross beam, so that the upper end of the second flange is higher than the first flange.

[0020] In the technical scheme, the first flange and the second flange can increase the contact area between the telescopic cross beam and the table board, reduce the damage of the supporting effect to the lower end surface of the table board, reduce the deformation of the lower end surface of the table board, increase the supporting effect, and the structure can increase the structural strength of the first cross beam and the second cross beam, and further increase the supporting effect.

[0021] Preferably, the first flange and the second flange are respectively located on the two sides of the width direction of the telescopic cross beam. The structure can increase the stability of the support, and the two flanges are respectively located on the two sides of the telescopic cross beam and do not interfere with each other.

[0022] Preferably, the telescopic cross beam is connected between the table leg assemblies on the same side of a single side; or the telescopic cross beam is connected between the table leg assemblies on the diagonal side of a single side.

[0023] In the first scheme, the telescopic cross beam is simple to connect with the table leg assembly. In the second scheme, the telescopic cross beam is diagonally connected between the table leg assemblies, which can make the telescopic cross beam as close as possible to the middle position of the table top, thereby increasing the supporting effect.

[0024] As a preferred embodiment, the telescopic cross beam has two and is connected side by side between two table leg assemblies, one end of each of the two first cross beams is fixed to one of the table leg assemblies, and one end of each of the two second cross beams is fixed to the other table leg assembly; or, one end of each of the two first cross beams is fixed to one of the table leg assemblies, and one end of each of the two second cross beams is fixed to the other table leg assembly.

[0025] In the first scheme, the two telescopic cross beams are connected side by side, which can increase the supporting effect. In the second scheme, the second cross beam can support the table top after being lifted, and the diagonal arrangement of the two second cross beams can more evenly support the table top, thereby avoiding the situation that the supporting strength of the side of the table top not supported by the second cross beam is insufficient when the two second cross beams are supported on the same side.

[0026] A table includes a table top and a table frame for the table as described above, the table leg assembly is arranged below the table top, the table leg assembly includes a table leg and a support frame fixed to the upper end of the table leg, the support part is arranged on the support frame, and the support frame supports the table top through the support part. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic diagram of the table frame in the present application;

[0028] Figure 2 is a structural schematic diagram of the telescopic cross beam in the present application Figure 1 ;

[0029] Figure 3 is a structural schematic diagram of the telescopic cross beam in the present application Figure 2 ;

[0030] Figure 4 is a structural schematic diagram of the table in the present application;

[0031] Figure 5 is a structural schematic diagram of the telescopic cross beam in the present application Figure 1 ;

[0032] Figure 6 is a structural schematic diagram of the telescopic cross beam in the present application Figure 2 ;

[0033] Figure 7 is a structural schematic diagram of the telescopic cross beam in the present application Figure 3 ;

[0034] Figure 8is a sectional view of the telescopic cross beam in the application Figure 1 ;

[0035] Figure 9 is Figure 8 a partial enlarged view at A in the application

[0036] Figure 10 is a sectional view of the telescopic cross beam in the application Figure 2 ;

[0037] Figure 11 is Figure 10 a partial enlarged view at B in the application

[0038] Figure 12 is a structural schematic of the telescopic cross beam in the application Figure 3 ;

[0039] Figure 13 is a partial structural schematic of the telescopic cross beam in the application Figure 4 ;

[0040] Figure 14 is a partial structural schematic of the telescopic cross beam in the application Figure 5 .

[0041] In the figure: first cross beam 1, groove 1.1, first flange 1.2, partition groove 1.3, upper cross beam 1.4, lower cross beam 1.5, first circular arc surface 1.6, second circular arc surface 1.7, second cross beam 2, second flange 2.1, sliding shaft 2.2, jacking slope 3, contact slope 4, contact block 5, boss 6, contact surface 7, avoiding groove 8, telescopic cross beam 100, table leg assembly 200, table leg 210, support frame 220, support part 221, table board 300. DETAILED DESCRIPTION

[0042] The application will be further described below in combination with the drawings and specific embodiments.

[0043] Embodiment 1:

[0044] As Figures 1 to 4As shown, a table frame for a table comprises two table leg assemblies 200 and a telescopic crossbeam 100 connected between the two table leg assemblies 200, the upper part of the two table leg assemblies 200 has a support part 221 for supporting a table top, and the support parts 221 of the two table leg assemblies 200 are at the same horizontal level, the telescopic crossbeam 100 comprises a first crossbeam 1 and a second crossbeam 2 which are telescopically sleeved with each other and can be telescopically extended 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 that of the contracted state, characterized in that, in the contracted state, the upper end surface of the first crossbeam 1 and the second crossbeam 2 is lower than or flush with the support part 221, and in the extended state, the sleeved part of the second crossbeam 2 is lifted by the first crossbeam 1, so that the upper end surface of the second crossbeam 2 is higher than the support part 221, for applying pressure to the table top when the table frame is connected to the table top to provide support.

[0045] In the above technical solution, one end of the first cross beam 1 is fixed with one of the table leg assemblies 200, one end of the second cross beam 2 is fixed with the other table leg assembly 200, and the telescopic cross beam 100 is relatively close to the middle position of the table top 300. In the extended state of the telescopic cross beam 100, the sleeving position of the second cross beam 2 is lifted by the first cross beam 1, so that the upper end of the second cross beam 2 is higher than the support part 221, and the upper end surface of the second cross beam 2 that is higher than the support part 221 can press the lower end surface of the table top 300 to provide support to the table top 300. The pressing force can cause the first cross beam 1 to be slightly deformed downward, and the first cross beam 1 that is slightly deformed can generate a corresponding reaction force and act on the table top 300, so that the part of the table top 300 that is supported and the first cross beam 1 are less likely to be further deformed, thereby increasing the support strength of the telescopic cross beam 100 to the table top 300 at the sleeving position of the telescopic cross beam 100. In the extended state of the telescopic cross beam 100, the sleeving position of the telescopic cross beam 100 and the two support parts 221 can form three-point support to the table top 300, which can increase a support point relative to the original two-point support formed by the two support parts 221, thereby increasing the support strength of the table frame to the table top 300. In the table frame structure that supports the table top through two support parts, the middle position of the two support parts is far away from the two support parts, so the support of the table frame to the table top at the middle position of the two support parts is the weakest. In the present solution, the sleeving position of the telescopic cross beam is the middle position of the two support parts, and the upper end surface of the second cross beam is higher than the support part, which can exactly support and strengthen the table top at this position, thereby solving the problem of insufficient support of the middle position of the two support parts to the table top. The sleeving position of the telescopic cross beam 100 is closer to the middle position of the table top 300 relative to the two support parts 221, so the above solution 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 cross beam 100 is extended, the support strength of the middle position of the table top 300 to the table frame is also increased, thereby solving the problem that the support strength of the middle position of the table top is weakened and the shaking amount is increased as the telescopic table frame is extended in the traditional table. The above technical solution has low implementation cost, relatively simple and stable structure, and does not increase the installation difficulty of the table.

[0046] Preferably, an upper open groove 1.1 is arranged on the first cross beam 1 along the length direction of the first cross beam 1, so that the second cross beam 2 can be placed in the groove 1.1. The structure can make the first cross beam 1 and the second cross beam 2 partially overlap in the height direction, reduce the height size of the telescopic cross beam 100, and the second cross beam 2 can be placed in the groove 1.1, thereby increasing the support of the first cross beam 1 to the second cross beam 2.

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

[0048] In the above technical solution, the first flange 1.2 and the second flange 2.1 can increase the contact area 7 between the telescopic cross beam 100 and the table top 300, reduce the damage to the lower end surface of the table top 300, reduce the deformation of the lower end surface of the table top 300, increase the support 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 support effect.

[0049] Preferably, the first flange 1.2 and the second flange 2.1 are respectively located on both sides of the width direction of the telescopic cross beam 100. The structure can increase the stability of the support, and the two flanges are respectively located on both sides of the telescopic cross beam 100 and do not interfere with each other.

[0050] Preferably, the first flange 1.2 and the second flange 2.1 extend outwardly from the groove 1.1.

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

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

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

[0054] It can be understood that in another embodiment, the telescopic cross beam has two and is connected between two table leg assemblies side by side, one end of the two first cross beams is fixed to one of the table leg assemblies, and one end of the two second cross beams is fixed to the other table leg assembly 200. The two telescopic cross beams are connected side by side, which can increase the support effect.

[0055] It can be understood that in another embodiment, one end of the two first cross beams is fixed with the two table leg assemblies respectively, and one end of the two second cross beams is fixed with the two table leg assemblies respectively. In the above technical solution, the second cross beam can support the table plate after being lifted, and the diagonal arrangement of the two second cross beams can more evenly support the table plate, so as to avoid the situation that when the two second cross beams are supported on the same side, the support strength of the side of the table plate not supported by the second cross beam is insufficient.

[0056] It can be understood that in one embodiment, the telescopic cross beam comprises a first cross beam and a second cross beam.

[0057] It can be understood that in another embodiment, the telescopic cross beam comprises two first cross beams and a second cross beam, the two first cross beams are connected with the two table leg assemblies respectively, and the second cross beam is connected with the two first cross beams at two ends respectively. The structure can make the second cross beam always be in the middle position of the table plate and support the middle position of the table plate.

[0058] Embodiment 2:

[0059] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 based on embodiment 1, the first cross beam 1 is provided with a jacking inclined surface 3 arranged obliquely along the length direction thereof, the second cross beam 2 is provided with a contact inclined surface 4 arranged obliquely along the length direction thereof, the jacking inclined surface 3 and the contact inclined surface 4 have the same oblique direction, the jacking inclined surface 3 is located below the contact inclined surface 4, the contact inclined surface 4 is adapted to and contacts with the jacking inclined surface 3, when the telescopic cross beam 100 is in the contracted state, the high end of the jacking inclined surface 3 contacts with the high end of the contact inclined surface 4, and the low end of the jacking inclined surface 3 contacts with the low end of the contact inclined surface 4, when the telescopic cross beam 100 is switched from the contracted state to the expanded state, the contact inclined surface 4 slides along the jacking inclined surface 3, so that the low end of the second cross beam 2 moves to the high end of the first cross beam 1 and is pressed against each other, so that the second cross beam 2 is lifted.

[0060] In the above technical solution, the lower end of the lifting slope 3 refers to the end with a relatively lower height, and the higher end of the lifting slope 3 refers to the end with a relatively higher height. Similarly, the lower end of the contact slope 4 refers to the end with a relatively lower height, and the higher end of the contact slope 4 refers to the end with a relatively higher height. When the telescopic crossbeam 100 is in the retracted state, the higher end of the first crossbeam 1 contacts the higher end of the second crossbeam 2, and the lower end of the first crossbeam 1 contacts the lower end of the second crossbeam 2. This provides a clearance function, preventing the upper surface of the second crossbeam 2 from being higher than the support part 221. In the retracted state, the upper ends of the first crossbeam 1 and the upper surfaces of the second crossbeam 2 both contact the tabletop 300 and provide support. When the telescopic beam 100 switches from a retracted state to an extended state, the contact slope 4 slides along the lifting slope 3. The longer the extension length of the telescopic beam 100, the higher the second beam 2 is lifted, and the higher the second beam 2 is above the support part 221. This results in stronger support for the tabletop 300 from the second beam 2. This achieves the goal of increasing the support strength of the table frame for the middle position of the tabletop 300 as the telescopic beam 100 extends, solving the problem in traditional tables where the support strength at the middle position weakens and the swaying increases as the telescopic table frame extends. Furthermore, during the extension process of the telescopic beam 100, the second beam 2 is raised to the corresponding height when the telescopic beam 100 extends to any length, strengthening its support for the tabletop 300. Therefore, within the table frame's adaptability range, the table frame can be adapted to the length of the tabletop 300 while simultaneously ensuring the enhanced support of the table frame for the tabletop 300.

[0061] Example 3:

[0062] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, based on Embodiment 1, the first crossbeam 1 is provided with a lifting inclined surface 3 that is inclined along its length direction, and the suspended end of the second crossbeam 2 is provided with a contact block 5. The contact block 5 contacts the lifting inclined surface 3 so that when the telescopic crossbeam 100 switches from the retracted state to the extended state, the contact block 5 slides along the lifting inclined surface 3 and the second crossbeam 2 is raised.

[0063] In the technical solution, the free end of the second cross beam 2 refers to the end of the second cross beam 2 that is not fixed to the leg assembly 200. The contact block 5 is arranged above the jacking slope 3. When the telescopic cross beam 100 is in the retracted state, the upper end surface of the first cross beam 1 and the upper end surface of the second cross beam 2 are in contact with the table board 300 to provide support. When the telescopic cross beam 100 is switched 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 cross beam 100, the higher the position of the jacking slope 3 in contact with the contact block 5, and the higher the lifting height of the contact block 5 and the second cross beam 2. The support strength of the second cross beam 2 on the table board 300 is stronger, achieving the purpose of increasing the support strength of the table frame on the middle position of the table board 300 as the length of the telescopic cross beam 100 is extended. The problem of weakening of the support strength of the middle position of the table and increasing of the shaking amount of the traditional table as the telescopic table frame is extended can be solved. During the extension of the telescopic cross beam 100, when the telescopic cross beam 100 is extended to any length position, the second cross beam 2 is lifted to a corresponding height to strengthen the support on the table board 300. Therefore, within the adaptation range of the table frame, the table frame can be adapted to the length of the table board 300 while ensuring the support of the table frame on the table board 300.

[0064] Preferably, the second cross beam 2 is provided with a clearance to avoid interference between structures other than the contact block 5 and the first cross beam 1 when the second cross beam 2 slides relative to the first cross beam 1.

[0065] Embodiment 4:

[0066] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 based on embodiment 1, the second cross beam 2 is provided with a jacking slope 3 arranged obliquely along the length direction thereof. The free end of the first cross beam 1 is provided with a contact block 5. The contact block 5 is in contact with the jacking slope 3 to make the contact block 5 slide along the jacking slope 3 and lift the second cross beam 2 when the telescopic cross beam 100 is switched from the retracted state to the extended state.

[0067] In the technical solution, the overhanging end of the first cross beam 1 refers to the end of the first cross beam 1 that is not fixed to the leg assembly 200. When the telescopic cross beam 100 is in the retracted state, the upper end surface of the first cross beam 1 and the upper end surface of the second cross beam 2 are in contact with the table board 300 to provide support. When the telescopic cross beam 100 is switched 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 cross beam 100, the lower the height of the position where the jacking slope 3 contacts the contact block 5, the higher the second cross beam 2 is lifted, and the stronger the support strength of the second cross beam 2 on the table board 300. The purpose of increasing the support strength of the table frame on the middle position of the table board 300 with the extension of the telescopic cross beam 100 is achieved, which solves the problem of the traditional table that the support strength of the middle position of the table decreases and the shaking increases with the extension of the telescopic table frame. During the extension of the telescopic cross beam 100, the second cross beam 2 is lifted to a corresponding height and the support on the table board 300 is strengthened when the telescopic cross beam 100 is extended to any length position. Therefore, within the adaptation range of the table frame, the table frame can be adapted to the length of the table board 300 while ensuring the support of the table frame on the table board 300.

[0068] Preferably, the first cross beam 1 is provided with a clearance to avoid interference between structures 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.

[0069] Embodiment 5:

[0070] As shown in Figures 1 to 4 , Figures 8 to 11 On the basis of embodiment 1, the first cross beam 1 is provided with a plurality of stepped protrusions 6 along the length direction, the second cross beam 2 is provided with a contact surface 7 in contact with the upper end surface of the protrusion 6 and a plurality of clearance grooves 8 for avoiding the protrusion 6, so that when the telescopic cross beam 100 is switched from the retracted state to the extended state, the contact surface 7 is switched from contact with the low protrusion 6 to contact with the high protrusion 6, and the second cross beam 2 is lifted. When the telescopic cross beam 100 is in the retracted state, the plurality of protrusions 6 are inserted into the corresponding plurality of clearance grooves 8. When the telescopic cross beam 100 is in the extended state, the contact surface 7 supports one of the protrusions 6 to lift the second cross beam 2.

[0071] In the above technical solution, the overhanging end of the first cross beam 1 refers to the end of the first cross beam 1 that is not fixed with the leg assembly 200. When the telescopic cross beam 100 is in the retracted state, the plurality of bosses 6 are respectively inserted into the plurality of avoidance grooves 8, and none of the plurality of bosses 6 is in contact with the contact surface 7. The upper end surface of the first cross beam 1 and the upper end surface of the second cross beam 2 are both in contact with the table board 300 to play a supporting role. When the telescopic cross beam 100 is switched from the retracted state to a specific extended state, the contact surface 7 is supported on the corresponding boss 6, and the second cross beam 2 is lifted. The remaining bosses 6 are either located in the avoidance groove 8 or outside the projection range of the second cross beam 2, and do not interfere with the second cross beam 2. The longer the extension 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 second cross beam 2 is lifted, and the stronger the support strength of the second cross beam 2 to the table board 300. The purpose of increasing the support strength of the table frame to the middle position of the table board 300 with the lengthening of the telescopic cross beam 100 is achieved. The problem that the support strength of the traditional table to the middle position of the table decreases and the shaking amount increases with the lengthening of the telescopic table frame can be solved.

[0072] It can be understood that, in an embodiment, the intervals between the adjacent two bosses 6 are the same, facilitating the bosses 6 to enter the respective avoidance grooves 8 for avoidance.

[0073] It can be understood that, in another embodiment, the intervals between the adjacent two bosses 6 are different, but when one of the bosses 6 is in contact with the contact surface 7, the second cross beam 2 is provided with avoidance grooves 8 at corresponding positions of the other bosses 6 located below the second cross beam 2 for avoiding the bosses.

[0074] It can be understood that, in another embodiment, the intervals between the adjacent two 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 is in contact with the contact surface 7, the other bosses 6 located below the second cross beam 2 are all arranged in the avoidance grooves 8.

[0075] Embodiment 6:

[0076] On the basis of embodiment 1, a plurality of bosses are arranged on the second cross beam in a stepped distribution along the length direction of the second cross beam. A contact surface in contact with the upper end surface of the boss and a plurality of avoidance grooves for avoiding the boss are arranged on the first cross beam. When the telescopic cross beam is switched from the retracted state to the extended state, the contact surface is switched from being in contact with the low boss to being in contact with the high boss, and the second cross beam is lifted. When the telescopic cross beam is in the retracted 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 the contact surface to lift the second cross beam.

[0077] 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 avoiding grooves, none of the plurality of bosses is in contact with the contact surface, and the upper end surface of the first cross beam and the upper end surface of the second cross beam are both in contact with the table board 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, the second cross beam is lifted, and the remaining bosses are either located in the avoiding grooves or are located outside the projection range of the first cross beam and do not interfere with the first cross beam. The longer the extension length of the telescopic cross beam is, the lower the lower end surface height of the boss in contact with the contact surface is, the higher the lifting height of the second cross beam is lifted, and the stronger the supporting strength of the second cross beam to the table board is. The purpose of strengthening the supporting strength of the table frame to the middle position of the table board with the lengthening of the telescopic cross beam is achieved, and the problem of weakening of the supporting strength of the middle position of the table and the increase of the shaking amount of the traditional table with the lengthening of the telescopic table frame is solved.

[0078] Embodiment 7:

[0079] As shown in Figure 12 and Figure 13 on the basis of any one of embodiments 2 to 6, a partition groove 1.3 is arranged on the first cross beam 1 along the telescopic direction of the first cross beam 1, for partitioning the first cross beam 1 into an upper cross beam 1.4 and a lower cross beam 1.5, the partition groove 1.3 is arranged with an open end close to the free end of the first cross beam 1, and the partition groove 1.3 is closed at an end away from the free end of the first cross beam 1, the second cross beam 2 is fixed with a sliding shaft 2.2 which can slide along the partition groove 1.3, the upper side surface of the partition groove 1.3 is in contact with the sliding shaft 2.2, and when the sleeve joint 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 supporting part 221.

[0080] In the technical scheme, in the stretched state of the telescopic cross beam, the sleeving position of the second cross beam is lifted by the first cross beam so that the upper end of the second cross beam is higher than the support part, and the sleeving position of the upper cross beam is lifted by the second cross beam so that the upper end surface of the upper cross beam is higher than the support part, the upper end surface of the second cross beam and the upper end surface of the upper cross beam that are higher than the support part can press the lower end surface of the table board to provide support to the table board, the upper end surface of the upper cross beam and the upper end surface of the second cross beam are synchronously lifted, and the upper cross beam and the second cross beam simultaneously support the table board on both sides of the table board, so that the telescopic cross beam can completely support the table board in the length direction, and the support effect can be increased. In the stretched state of the telescopic cross beam, the sleeving position of the telescopic cross beam and the two support parts can form four-point support to the table board, and compared with the original two-point support formed by the two support parts, two support points are increased, so that the support strength of the table frame to the table board is increased, and the sleeving position of the telescopic cross beam is arranged at the middle of the two support parts, the support effect of the two support parts to the table board is weakest at the middle of the two support parts, the sleeving position of the telescopic cross beam can support and strengthen the table board at the position, and the problem of insufficient support effect of the two support parts to the table board at the middle of the two support parts can be solved. The sleeving position of the telescopic cross beam is closer to the middle of the table board relative to the two support parts, and therefore, the above scheme can increase the support strength of the middle of the table board.

[0081] Embodiment 8:

[0082] As shown in FIGS. 1 to 3, the first cross beam 1 and the second cross beam 2 are arranged on the same horizontal plane, and the upper cross beam 1.4 and the lower cross beam 1.5 are arranged on the same horizontal plane. Figure 12 and Figure 14 As shown in FIGS. 1 to 3, the first cross beam 1 and the second cross beam 2 are arranged on the same horizontal plane, and the upper cross beam 1.4 and the lower cross beam 1.5 are arranged on the same horizontal plane.

[0083] In the above technical solution, when the telescopic cross beam 100 switches from the contracted state to the stretched state, the sliding shaft 2.2 slides along the partition groove 1.3, the sliding shaft 2.2 is lifted by the upper end surface of the lower cross beam 1.5 at the same time, the upper end surface of the second cross beam 2 is synchronously lifted and supports the table board 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 also lift the upper end surface of the upper cross beam 1.4 through the lower end surface of 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, and the table board 300 can be pressed to provide support. The partition groove 1.3 has the following functions: first, the upper end surface of the upper cross beam 1.4 (i.e. the lower end surface of the partition groove 1.3) has a guiding and supporting effect, which can lift the upper end surface of the second cross beam 2 when the telescopic cross beam 100 switches from the contracted state to the stretched state, so that it presses the lower end surface of the table board 300 and strengthens the support of the table board 300; second, the partition groove 1.3 divides the first cross beam 1 into the upper cross beam 1.4 and the lower cross beam 1.5, the lower cross beam 1.5 can provide support during the telescopic process, the upper cross beam 1.4 can be deformed upward to press the table board 300 under the action of the sliding shaft 2.2 to provide support, and the table board 300 on one side of the first cross beam 1 can also be supported by the upper cross beam 1.4 when the telescopic cross beam 100 is in the stretched state, thereby increasing the support effect on that side; fourth, during the stretching process of the telescopic cross beam 100, the telescopic cross beam 100 can stop at any length position, and can be adapted to the length of the table board 300; fifth, only one partition groove 1.3 is provided to realize multiple functions, and the processing difficulty of the first cross beam 1 is not greatly increased, so that the processing cost can be reduced 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 cross beam 100, the higher the lifting height of the second cross beam 2 and the upper cross beam 1.4, the higher the height of the lifted second cross beam 2 and the upper cross beam 1.4 than the support part 221, and the stronger the support strength of the second cross beam 2 and the upper cross beam 1.4 to the table board 300, thereby achieving the purpose that as the length of the telescopic cross beam 100 is extended, the support strength of the table frame to the middle position of the table board 300 is also increased, and the problem that the support strength of the traditional table to the middle position of the table is weakened and the shaking amount is increased as the telescopic table frame is extended can be solved. Moreover, during the extension process of the telescopic cross beam 100, when the telescopic cross beam 100 is extended to any length position, the second cross beam 2 is lifted by a corresponding height and the support effect on the table board 300 is strengthened, so that within the adaptation range of the table frame, the table frame can be adapted to the length of the table board 300, and the support of the table frame to the table board 300 is also strengthened.

[0084] Example 9:

[0085] As Figure 13 and Figure 14As shown in the drawings, on the basis of Embodiment 7 or 8, the upper end surface of the upper cross beam 1.4 is a first arc surface 1.6, the height of the first arc surface 1.6 near the free end side of the first cross beam 1 is lower than the height of the first arc surface 1.6 near the fixed end side of the first cross beam 1, and the lower end surface of the upper cross beam 1.4 is a second arc surface 1.7 matched with the first arc surface 1.6, so that the thickness of the upper cross beam 1.4 at each position in the length direction thereof is the same. The axis of the first arc surface 1.6 and the second arc surface 1.7 is located below the upper cross beam 1.4.

[0086] In the above technical solution, when the middle position of the upper cross beam 1.4 is lifted by the sliding shaft 2.2, the upper cross beam 1.4 and the sliding shaft 2.2 form a simple lever structure, the free end of the upper cross beam 1.4 also rises, and the rising height of the free end is higher than the rising height of the middle position of the upper cross beam 1.4, the first arc surface 1.6 can offset the rising height of the free end, so that the free end of the upper cross beam 1.4 is prevented from contacting the table board 300, the position of the upper cross beam 1.4 supported by the table board 300 and the position between the supported position and the upper cross beam 1.4 can press the table board 300 to form support for the table board 300, and the table board 300 near the free end of the upper cross beam 1.4 is supported by the upper end surface of the second cross beam 2. The thickness of the upper cross beam at each position in the length direction thereof is the same, the upper end surface of the upper cross beam is higher than the height of the support part, and the upper end surface of the second cross beam is higher than the support part, which are determined by the inclination of the upper end surface of the lower cross beam, the protruding heights of the two are the same, and the table board can be supported by close support force without mutual interference.

[0087] Embodiment 10:

[0088] As shown in the drawings, Figure 1 and Figure 4 A table includes a table board 300 and a table frame for the table, the table leg assembly 200 is arranged below the table board 300, 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, the support part 221 is arranged in the support frame 220, and the support frame 220 supports the table board 300 through the support part 221.

[0089] The present application has the advantages of simple structure, low manufacturing cost, simple disassembly and assembly method, high disassembly and assembly efficiency, no damage to the outer surface of the spring, and adaptability to 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 crossbeam connecting the two, wherein the upper portions of the two table leg assemblies have support portions for supporting a tabletop, and the support portions of the two table leg assemblies are on the same horizontal plane, and the telescopic crossbeam comprises a first crossbeam and a second crossbeam that are nested together and retractable relative to each other, such that the telescopic crossbeam can switch between a retracted state and an extended state with a length greater than the retracted state, characterized in that, The telescopic crossbeam is in the contracted state, the upper end surface of the first crossbeam and the second crossbeam is lower than or flush with the support part, and the telescopic crossbeam is in the expanded state, the sleeve joint part of the second crossbeam is lifted by the first crossbeam, so that the upper end surface thereof is higher than the support part, for applying pressure to the table board when the table frame is connected to the table board, thereby providing support.

2. A table frame for a table according to claim 1, characterized in that The first crossbeam is provided with a lifting inclined surface arranged along the length direction thereof, the second crossbeam is provided with a contact inclined surface arranged along the length direction thereof, the contact inclined surface is adapted to and contacts with the lifting inclined surface, when the telescopic crossbeam is in the contracted state, the high end of the lifting inclined surface contacts with the high end of the contact inclined surface, and the low end of the lifting inclined surface contacts with the low end of the contact inclined surface, when the telescopic crossbeam is switched from the contracted state to the expanded state, the contact inclined surface slides along the lifting inclined surface, so that the low end of the second crossbeam moves to the high end of the first crossbeam, thereby lifting the second crossbeam.

3. The table frame of claim 1, wherein The first crossbeam is provided with a lifting inclined surface arranged along the length direction thereof, the free end of the second crossbeam is provided with a contact block, the contact block contacts with the lifting inclined surface, so that when the telescopic crossbeam is switched from the contracted state to the expanded state, the contact block slides along the lifting inclined surface, thereby lifting the second crossbeam.

4. The table frame of claim 1, wherein The second crossbeam is provided with a lifting inclined surface arranged along the length direction thereof, the free end of the first crossbeam is provided with a contact block, the contact block contacts with the lifting inclined surface, so that when the telescopic crossbeam is switched from the contracted state to the expanded state, the contact block slides along the lifting inclined surface, thereby lifting the second crossbeam.

5. The table frame of claim 1, wherein, The first crossbeam is provided with a plurality of stepped distributed bosses along the length direction thereof, the second crossbeam is provided with a contact surface contacting with the upper end surface of the boss and a plurality of avoiding grooves for avoiding the boss, so that when the telescopic crossbeam is switched from the contracted state to the expanded state, the contact surface is switched from contacting with the low boss to contacting with the high boss, thereby lifting the second crossbeam, when the telescopic crossbeam is in the contracted state, the plurality of bosses are respectively inserted into the plurality of avoiding grooves, when the telescopic crossbeam is in the expanded state, one of the bosses is supported on the contact surface to lift the second crossbeam.

6. The table frame of claim 1, wherein The second crossbeam is provided with a plurality of stepped distributed bosses along the length direction thereof, the first crossbeam is provided with a contact surface contacting with the upper end surface of the boss and a plurality of avoiding grooves for avoiding the boss, so that when the telescopic crossbeam is switched from the contracted state to the expanded state, the contact surface is switched from contacting with the low boss to contacting with the high boss, thereby lifting the second crossbeam, when the telescopic crossbeam is in the contracted state, the plurality of bosses are respectively inserted into the plurality of avoiding grooves, when the telescopic crossbeam is in the expanded state, one of the bosses is supported on the contact surface to lift the second crossbeam.

7. A table frame for a table according to any one of claims 1 to 6, characterized in that The first crossbeam is provided with an upper open groove along the length direction thereof, so that the second crossbeam can be placed in the groove.

8. A table frame for a table according to claim 7, characterised in that The upper end of the first cross beam extends transversely to form a first flange, the upper end of the second cross beam extends transversely to form a second flange, in the contracted state, the upper surface of the first flange and the upper surface of the second flange are flush with the support part, in the expanded state, the second flange is lifted by the first cross beam so that the upper end of the second flange is higher than the first flange.

9. A table frame for a table according to claim 8, characterised in that The first flange and the second flange are respectively located on both sides of the width direction of the telescopic cross beam.

10. A table frame for a table according to any one of claims 1 to 6, characterized in that The telescopic cross beam is connected between the table leg assemblies on the same side; or, the telescopic cross beam is connected between the table leg assemblies on the diagonal side.

11. A table frame for a table according to any one of claims 1 to 6, characterized in that The telescopic cross beam has two and is connected between two table leg assemblies side by side, one end of the two first cross beams is fixed with one of the table leg assemblies, and one end of the two second cross beams is fixed with the other table leg assembly; or, one end of the two first cross beams is fixed with two table leg assemblies respectively, and one end of the two second cross beams is fixed with two table leg assemblies respectively.

12. A table comprising a table top, characterised in that Also including the table frame for a table according to any one of claims 1 to 11, the table leg assembly is arranged below the table board, the table leg assembly comprises a table leg and a support frame fixed on the upper end of the table leg, the support part is arranged in the support frame, and the support frame supports the table board through the support part.

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