Automatic flip telescopic table frame and table

Abstract

The invention discloses an automatic flipping and retractable table frame and a table, belonging to the field of tables. The table frame in the invention comprises a crossbeam and mounting side panels arranged at both ends of the crossbeam. A telescopic push rod and a flip frame are also provided on the table frame. The rear end of the flip frame is hinged to the telescopic end of the telescopic push rod. The telescopic push rod is provided with a flipping power system that moves with the extension and retraction of the telescopic push rod. The flipping power system comprises a driving member that provides power for the flip frame and a transmission mechanism fixed on the telescopic push rod. The front end of the flip frame is hinged to the transmission mechanism, and the flip frame is driven to flip through the transmission mechanism. The integrated design of the table frame can realize dual adjustment of length and angle. Users can find the most comfortable state according to their needs. The table frame is more beneficial to health, has strong functionality, and has a wide range of applications.

Description

[Technical field]

[0001] The invention relates to the technical field of tables, and in particular to an automatically flipping and retractable table frame and a table. [Background technology]

[0002] Tables are one of the most widely used pieces of furniture in our daily life. They are often used for study, work, dining and placing items. The tabletop of a traditional table is fixed horizontally. When studying and working on such a table, one needs to bend down. Long-term use can easily cause diseases of the spine, waist and back, and can also cause myopia. In addition, the size of the tabletop is fixed and the use is single. When the use area needs to be expanded or reduced, the entire table must be replaced, which increases costs and wastes materials. In response to the problems of traditional tables, some tables with adjustable length or angle have appeared on the market, such as dining tables that can be adjusted in length according to the number of diners, or drawing tables with adjustable angles. However, the adjustment of these angles or lengths is either done by manually adjusting and fastening a mechanical structure, which has a limited number of adjustable levels, increasing the fixed length, and poor firmness; or it is done by semi-automatic adjustment based on hydraulic or pneumatic devices, in which the adjusted angle or length is discontinuous, the adjustment cannot be in place at one time, the accuracy is low, and it cannot be adjusted at will according to the needs of the user to stay at the appropriate length and position. In addition, long-term use will cause many unsafe factors such as hydraulic cylinder leakage or cylinder explosion. At the same time, the current adjustable table can only adjust the length or height separately, and the length and height cannot be adjusted at the same time on the same table, and the functionality is single. [Summary of the invention]

[0003] The technical problem to be solved by the invention is to overcome the deficiencies in the prior art and to design an integrated table frame which can realize automatic adjustment of angle and length at the same time.

[0004] To solve the above technical problems, the invention adopts the following technical solutions:

[0005] The invention discloses an automatic flipping and retractable table frame, which comprises a crossbeam and mounting side panels arranged at both ends of the crossbeam. The table frame is also provided with a telescopic push rod and a flip frame. The rear end of the flip frame is hinged to the telescopic end of the telescopic push rod. The telescopic push rod is provided with a flipping power system that moves as the telescopic push rod is extended or retracted. The flipping power system comprises a driving member that provides power for the flip frame and a transmission mechanism fixed on the telescopic push rod. The front end of the flip frame is hinged to the transmission mechanism, and the flip frame is driven to flip via the transmission mechanism.

[0006] Beneficial effects of the invention:

[0007] 1. The table frame in this scheme is installed under the desktop when in use. The length of the table frame is adjusted by extending and retracting the telescopic push rod. The flip frame is flipped at a certain angle under the drive of the transmission mechanism, thereby driving the flip of the desktop fixed thereon. Through the above-mentioned integrated design, dual adjustment of length and angle can be achieved on a table frame. Users can find the most comfortable standing or sitting position according to their own conditions and needs, which is more conducive to health and improves learning and office efficiency.

[0008] 2. There are two drive systems for driving the telescopic push rod to extend and retract and for driving the flip frame to flip. One of them can be driven separately to achieve length adjustment or angle adjustment separately, or it can be driven synchronously to achieve synchronous adjustment of length and angle, which can change more forms, has stronger functionality and a wide range of applications.

[0009] 3. The flip table top is fixed on the flip frame. If only the length of the table frame is adjusted without adjusting the angle of the flip frame, the flip power system will not work. The front end of the flip frame is hinged to the transmission part of the flip power system, and the rear end of the flip frame is hinged to the telescopic end of the telescopic push rod. The flip power system moves synchronously with the extension and retraction of the telescopic push rod. Therefore, the front and rear ends of the flip frame are relatively still and the distance between them remains unchanged, which will not cause the flip frame to be squeezed or bent and deformed, thereby ensuring the stability of the flip frame, thereby ensuring the connection firmness of the desktop on the table frame and the stability during movement.

[0010] 4. The rear end of the flip frame flips with the desktop, providing better rear resistance and lower support for the lower end of the flipped desktop, ensuring the stability of the desktop during use.

[0011] 5. The front and rear ends of the flip frame are both hinged so that during the flipping process, when the flipping part changes position and angle with the desktop, the relative rotation is more flexible.

[0012] Preferably, telescopic push rods are fixedly provided on the mounting side plates at both ends, and the telescopic push rods at both ends are symmetrically arranged and driven synchronously, and transmission mechanisms are fixed on the telescopic push rods at both ends, and the transmission mechanisms at both ends are symmetrically arranged and driven synchronously.

[0013] The telescopic push rods at both ends are symmetrically arranged and driven synchronously, so that the two ends of the table frame can be telescoped synchronously and the two sides of the flip frame can move synchronously, ensuring the stability of the table frame. The transmission mechanisms at both ends are symmetrically arranged and driven synchronously, providing sufficient flipping driving force for the flip frame, ensuring that the flipping action is completed smoothly, and making the force on both sides of the flip frame uniform, ensuring that both ends of the flip frame flip at the same time, preventing torsion and distortion on the flip frame. This design has a reliable structure and high load.

[0014] Preferably, the telescopic push rod includes a sleeved outer tube and an inner tube, the outer tube is fixed on the mounting side plate, a long through groove is formed on the inner side wall of the outer tube, the transmission mechanism is fixedly connected to the side wall of the inner tube and moves with the extension and contraction of the inner tube. The above structure enables the transmission mechanism to move with the extension and contraction of the inner tube, and the installation position of the fixed frame and the length of the long through groove are determined by the required extension and movement stroke.

[0015] Preferably, the transmission mechanism includes a first screw rod that rotates under the drive of a driving member, a first screw rod nut that is sleeved on the first screw rod and moves as the first screw rod rotates, and a supporting connecting member that connects the first screw rod nut and the front end of the flip frame, and the front end of the flip frame is hinged to the supporting connecting member.

[0016] When the desktop needs to be flipped upward, the driving member rotates forward, driving the first screw rod to rotate, so that the first screw rod nut on it moves forward, shortening the horizontal distance with the front end of the flip frame, but the length of the hard support connecting member connected between the two remains unchanged, so one end of the support connecting member drives the front end of the flip frame to rise, and the vertical position of the rear end of the flip frame changes slightly. In order to adapt to the inclination of the flip frame, the flip frame rotates relative to the frame, so that the desktop and the frame form a certain flip angle; when the flipped desktop needs to be restored to its original position, the driving member reverses, and the operation process is opposite to the above process. Flipping and angle adjustment are achieved through the cooperation of the screw rod and the first screw rod nut, with high adjustment accuracy, and can be stopped at the required position immediately, and any angle can be adjusted within the allowable range.

[0017] Preferably, a guide column for guiding the first screw nut is provided on one side of the first screw, and the first screw nut is sleeved on the guide column and slides relative to the guide column to prevent the first screw nut from rotating with the thread during sliding, causing the supporting connecting part and the flip frame to tilt, thereby affecting the stability of the table during the flipping process.

[0018] Preferably, the transmission mechanism also includes a mounting frame, the side wall of the mounting frame is fixedly connected to the side wall of the inner tube, the first screw rod is arranged in the mounting frame, and mounting blocks for mounting the first screw rod and the guide column are provided at both ends of the first screw rod, and the mounting blocks ensure the stability of the first screw rod and the guide column, thereby ensuring the stability of the entire transmission mechanism.

[0019] Preferably, the mounting frame is provided with a support member supported on the bottom side of the support connector, which supports the support connector obliquely upward to prevent the support connector from breaking during the squeezing of the desktop and the screw nut when the flip frame drives the desktop to flip.

[0020] Preferably, the telescopic push rods at both ends include an outer tube and an inner tube that are connected together. A second screw and a second screw nut that is connected to the second screw and moves with the rotation of the second screw are provided in the telescopic push rods at both ends. The second screw nut is connected to the inner tube and drives the inner tube to extend and retract. A reduction gear box that drives the second screw rod to rotate is also provided in the telescopic push rod. A motor is provided in the middle of the table frame. The output shafts on both sides of the motor are respectively connected to the reduction gear boxes at both ends and synchronously drive the reduction gear boxes at both ends. The single motor synchronously drives the telescopic push rods at both ends to extend and retract through the reduction gear box. The structure is compact and the installation is convenient.

[0021] Preferably, a lifting column is provided under the table frame, and the top end of the lifting column is fixedly connected to the bottom end of the table frame. The height of the table frame can be adjusted by the lifting column, further increasing the adjustment function of the table frame.

[0022] The invention adopts another technical solution:

[0023] A table comprises a table top, under which is arranged a table frame as described in any of the above technical solutions, wherein the table top comprises a flip table top arranged on a flip frame, and the flip table top is moved and / or flipped by the movement and / or flipping of the flip frame, thereby adjusting the angle and / or position of the table top.

[0024] These features and advantages of the invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0025] The invention will be further described below in conjunction with the accompanying drawings:

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the table of the present invention.

[0027] Figure 2 It is a schematic diagram of the three-dimensional structure of the table frame of the present invention.

[0028] Figure 3 It is a schematic diagram of the table frame of the present invention.

[0029] Figure 4 This is a schematic diagram of the three-dimensional structure of the telescopic structure of the table frame of the second embodiment of the present invention after removing the side panel and the outer tube on one side.

[0030] Figure 5 It is a partial perspective view of the table frame flip frame of the present invention when it is not flipped.

[0031] Figure 6 It is a partial perspective view of the table frame flip frame of the present invention after flipping.

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of the table frame flip frame of the present invention. [Specific implementation method]

[0033] The following is an explanation and description of the technical scheme of the embodiment of the invention in conjunction with the drawings of the embodiment of the invention, but the following embodiment is only a preferred embodiment of the invention, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without making creative work are all within the scope of protection of the invention.

[0034] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as a limitation of the invention.

[0035] Embodiment 1:

[0036] like Figures 1 to 7 As shown, an automatic flip table frame includes a frame 002, the frame 002 includes a crossbeam 1 and a longitudinal beam 20 arranged at both ends of the crossbeam 1, a flip frame 4 is provided on the frame 002, the flip frame 4 and the longitudinal beam 20 are hinged through a four-link hinge 9, the four-link hinge 9 includes a front swing arm 901 and a rear swing arm 902, the rear end of the flip frame 4 is hinged to the lower end of the front swing arm 901 and the lower end of the rear swing arm 902, and the front end of the longitudinal beam 20 is hinged to the upper end of the front swing arm 901 and the upper end of the rear swing arm 902.

[0037] The table frame in this scheme is placed under the table top 001 when in use, and the table top 001 is flipped by flipping the flip frame 4. After flipping, the rear end of the flip frame 4 supports the bottom end of the table top 001. The rear end of the flip frame 4 is hinged to the front end of the longitudinal beam 20 through a four-link hinge 9. The front swing arm 901 and the rear swing arm 902 are hinged to the longitudinal beam 20 in the above-mentioned manner. Figure 5 As shown, before flipping, the front swing arm 901 and the rear swing arm 902 are symmetrical with respect to the vertical center axis. During the flipping process of the flip frame 4 driven by the driving force, the longitudinal beam 20 is fixed, so the front swing arm 901 rotates with its upper end as the rotation center, and the rear swing arm 902 rotates with its upper end as the rotation center. The front swing arm 901 and the rear swing arm 902 have different initial positions and different rotation centers, so that the movement trajectories of the lower ends of the front swing arm 901 and the rear swing arm 902 are different, as shown in FIG. Figure 6As shown, after the rotation, an angle difference is formed, so that the flip frame 4 can be flipped smoothly. The rear end of the flip frame 4 and the front end of the longitudinal beam 20 adopt a four-link hinge 9, two front and rear connecting arms, and four hinge points. The connection structure is more solid, not easy to damage, long service life, high support stability, no up and down shaking, and more flexible rotation. The flip limit angle is larger. Tests show that the limit angle can reach 50°. The rotation center of the front swing arm 901 and the rear swing arm 902 is at the upper end, and the hinge with the rear end of the flip frame 4 is at the lower end. Therefore, when the lower end of the front swing arm 901 and the lower end of the rear swing arm 902 rotate, the rear end of the flip frame 4 will be driven to move upward, thereby driving the bottom end of the desktop 001 to lift upward. Tests show that the bottom end of the desktop 001 can be raised by 15mm, leaving enough space for the drawer at the bottom of the table frame to be pulled out, which is more convenient to use.

[0038] In order to prevent the overturning frame 4 from being damaged by continuing to overturn after it has turned to the maximum overturning angle, Figure 6 As shown, a flip limit portion 902a is provided at the upper end of the rear swing arm 902. When the flip frame 4 flips to the maximum angle, the flip limit portion 902a abuts against the front swing arm 901. The limit prevents the flip frame 4 from continuing to flip after it flips to the maximum flip angle and damaging the flip frame 4, and further improves the stability of the flip frame 4 at the maximum flip angle. This limiting structure is a swing arm that bears force itself, and the limiting is more reliable. There is no need to install an additional limiting device, which simplifies the installation structure, saves time and effort, and saves materials.

[0039] In order to drive the active flipping of the flip frame 4, a flipping power system 5 is also provided on the frame 002. The flipping power system 5 includes a first driving member that provides power for the flip frame 4 and a transmission mechanism 502 that is fixed on the inner side of the longitudinal beams 20 at both ends and symmetrically arranged. The transmission mechanisms 502 at both ends are driven synchronously, and the front end of the flip frame 4 is hinged on the transmission mechanism 502. The flip frame 4 is driven to flip through the transmission mechanism 502. The first driving member provides power for the flipping of the flip frame 4. The transmission mechanism 502 transmits the power to the front end of the flip frame 4 and drives the flip frame 4 to flip. The transmission mechanism 502 is symmetrically arranged on the inner side of the longitudinal beams 20 at both ends and is driven synchronously, which provides sufficient flipping driving force for the flip frame 4 to ensure that the flipping action is completed smoothly. The forces at both ends are even, which ensures that both sides of the flip frame 4 flip at the same time, and prevents the flip frame 4 from twisting and deformation due to torsion in the horizontal direction. This design structure is reliable and has a high load.

[0040] In order to improve the accuracy of flipping, Figure 3As shown, the transmission mechanism 502 includes a mounting frame 502d fixedly connected to the longitudinal beam 20, a first screw rod 502a that rotates when driven by a first driving member, a screw nut 502b that is sleeved on the first screw rod 502a and moves as the first screw rod 502a rotates, and a supporting connecting member 502c that connects the screw nut 502b and the front end of the flip frame 4. The front end of the flip frame 4 is hinged to the supporting connecting member 502c, and the first screw rod 502a is arranged in the mounting frame 502d.

[0041] When the desktop 001 needs to be flipped upward, the first driving member rotates forward, driving the first screw rod 502a to rotate, so that the screw nut 502b on it moves forward, shortening the horizontal distance with the front end of the flip frame 4, but the length of the hard supporting connecting member 502c connected between the two remains unchanged, so one end of the supporting connecting member 502c drives the front end of the flip frame 4 to rise, and the vertical position of the rear end of the flip frame 4 changes slightly. In order to adapt to the inclination of the flip frame 4, the flip frame 4 rotates relative to the frame 002, so that the desktop 001 and the frame 002 form a certain flip angle; when the flipped desktop 001 needs to be restored to its original position, the first driving member reverses, and the operation process is opposite to the above process. The flipping and angle adjustment are achieved through the cooperation of the screw rod and the screw nut 502b, with high adjustment accuracy, and can be stopped at the required position immediately, and any angle adjustment can be performed within the allowable range.

[0042] In order to prevent the screw nut 502b from rotating along with the thread during the sliding process, causing the supporting connecting piece 502c and the flip frame 4 to tilt, a guide column 502f is provided on one side of the first screw 502a to guide the screw nut 502b. The screw nut 502b is sleeved on the guide column 502f and slides relative to the guide column 502f, thereby ensuring the stability of the table during the flipping process.

[0043] The first driving member in this embodiment is the first motor 501. In order to ensure the stability of the first screw rod 502a and the guide column 502f, and thus ensure the stability of the entire transmission mechanism 502, mounting blocks 502e for mounting the first screw rod 502a and the guide column 502f are provided at both ends of the first screw rod 502a. The first motor 501 is connected to the first reducer, and the first reducer is mounted on the mounting block 502e. In order to save space, the first motor 501 is arranged parallel to the first screw rod 502a and is installed in the mounting frame 502d. The first reducer is provided with a first turbine, a through hole is provided in the turbine, and a worm is inserted in the through hole. The output shaft of the first motor 501 and the turbine form a first-stage reduction system, and the worm and the end of the screw rod form a second-stage reduction system, thereby realizing a two-stage reduction.

[0044] In order to prevent the support connector 502c from breaking during the process of the desktop 001 and the screw nut 502b being squeezed when the desktop 001 is turned over by the turning frame 4, as shown in FIG. Figure 3As shown, a support member 6 supported on the bottom side of the support connecting member 502c is provided on the mounting frame 502d, and the support member 6 supports the support connecting member 502c obliquely upward.

[0045] The front end of the flip frame 4 is an active end, including an active flip member 401 located at the front end of the flip frame 4 for connecting to the flip desktop 001, and the rear end of the flip frame 4 is a driven end, including a driven flip member 402 located at the rear end of the flip frame 4 for connecting to the flip desktop 001. In this embodiment, the active flip member 401 is connected to the front end of the flip desktop 001, and the driven flip member 402 is connected to the rear end of the flip desktop 001. The active flip member 401 drives the flip desktop 001 to flip, and the flip desktop 001 then drives the driven flip member 402 to flip. It can be understood that Figure 2 , Figure 3 and Figure 7 As shown, a connecting plate 403 may be provided between the active flip member 401 and the driven flip member 402 , and the two members are connected via the connecting plate 403 , so that the active flip member 401 drives the driven flip member 402 to flip.

[0046] In this embodiment, in order to better realize the hinge connection between the active flip member 401 and the driven flip member 402, a connecting ear 401a is provided at the end of the active flip member 401, and the connecting ear 401a is hinged to the end of the support connecting member 502c away from the screw nut 502b. The hinge structure is adopted to make the active flip member 401 more flexible in the rotation during the rising process. The back of the driven flip member 402 is provided with a connecting side plate 402a, and the connecting side plate 402a is respectively hinged to the lower end of the front swing arm 901 and the lower end of the rear swing arm 902. In order to simplify the structure and facilitate rotation, the specific hinge method of the four-link hinge 9 is as follows: Figure 4 As shown, the front end of the longitudinal beam 20 is provided with a first hinge hole 302a and a second hinge hole 302b. The longitudinal beam 20 is hinged to the upper end of the front swing arm 901 through the first hinge hole 302a, and the longitudinal beam 20 is hinged to the upper end of the rear swing arm 902 through the second hinge hole 302b. Figure 7 As shown, a third hinge hole 402aa and a fourth hinge hole 402ab are provided on the connecting side plate 402a. The connecting side plate 402a is hinged to the lower end of the front swing arm 901 through the third hinge hole 402aa, and the connecting side plate 402a is hinged to the lower end of the rear swing arm 902 through the fourth hinge hole 402ab.

[0047] In order to make the flipping of the driven flip member 402 more stable, Figure 4As shown, a mounting groove is provided at the front end of the longitudinal beam 20, and inner connecting side plates 402a1 and outer connecting side plates 402a2 are provided at both ends of the driven flip member 402. The inner connecting side plates 402a1 are hinged to the inner wall of the mounting groove through a four-bar hinge 9, and the outer connecting side plates 402a2 are hinged to the outer wall of the mounting groove through a four-bar hinge 9. With the above-mentioned mounting structure, two sets of four-bar hinges 9 are provided at each end of the driven flip member 402, which have better supporting effect and higher stability.

[0048] In order to further enhance the adjustment function of the table frame 002, a lifting column (not shown in the figure) is provided under the table frame 002, and the top of the lifting column is fixedly connected to the bottom of the table frame 002, so that the height of the table frame 002 can be adjusted through the lifting column.

[0049] Embodiment 2:

[0050] The difference between this embodiment and the first embodiment is that a telescopic push rod 3 is further provided on the frame 002. At this time, the rear end of the flip frame 4, that is, the driven flip member 402 is hinged to the telescopic end of the telescopic push rod 3, and the transmission mechanism 502 in the flip power system 5 is fixed on the telescopic push rod 3 and moves with the extension and retraction of the telescopic push rod 3. The flip power system 5 in this embodiment is fixedly set on the telescopic push rod 3 and moves with the extension and retraction of the telescopic push rod 3.

[0051] The table frame in this embodiment adopts the above structure, and the length of the table frame is adjusted by the extension and retraction of the telescopic push rod 3, and the flip frame 4 is flipped at a certain angle under the drive of the transmission mechanism 502, thereby driving the flipping of the desktop 001 fixed thereon. Through the above integrated design, dual adjustment of length and angle can be achieved on a table frame, and the user can find a most comfortable standing or sitting position according to his own conditions and needs, which is more conducive to health and improves learning and office efficiency. There are two sets of drive systems for driving the telescopic push rod 3 to extend and the flip frame 4 to flip. One of them can be driven separately to achieve length adjustment or angle adjustment separately, or it can be driven synchronously to achieve synchronous adjustment of length and angle, which can change more forms, has stronger functionality, and has a wide range of applications. The flip tabletop 001 is fixed on the flip frame 4. If only the length of the table frame is adjusted without adjusting the angle of the flip frame 4, the flip power system 5 does not work. The front end of the flip frame 4, that is, the active flip member 401 is hinged with the transmission member of the flip power system 5, and the driven flip member 402 is hinged with the telescopic end of the telescopic push rod 3. The flip power system 5 moves synchronously with the telescopic extension of the telescopic push rod 3. Therefore, the active flip member 401 and the rear end are relatively static, and the distance between them remains unchanged, which will not cause the flip frame 4 to be squeezed or bent and deformed, thereby ensuring the stability of the flip frame 4, thereby ensuring the connection firmness of the desktop 001 on the table frame and the stability during movement. While the driven flip member 402 flips with the desktop 001, it provides a better rear side resistance and lower side support for the lower end of the flipped desktop 001, thereby ensuring the stability of the desktop 001 during use. The active flip member 401 and the driven flip member 402 are both hinged, so that when the flip member changes position and angle with the desktop 001 during the flipping process, the relative rotation is more flexible.

[0052] It can be understood that the telescopic push rod 3 can be a single telescopic push rod 3 arranged on the table frame, and in this case, the transmission mechanism 502 also constitutes a set.

[0053] However, in order to better maintain the balance of the table frame and provide sufficient turning driving force for the active turning member 401 to ensure the smooth completion of the turning action, mounting side panels 2 are provided at both ends of the table frame crossbeam 1, and telescopic push rods 3 are fixed on the mounting side panels 2 at both ends. At this time, the telescopic push rods 3 serve as the longitudinal beams 20 of the table frame, and the telescopic push rods 3 at both ends are symmetrically arranged and synchronously driven. Transmission mechanisms 502 are fixed on the telescopic push rods 3 at both ends, and the transmission mechanisms 502 at both ends are symmetrically arranged and synchronously driven. The telescopic push rods 3 at both ends are symmetrically arranged and synchronously driven, so that the two ends of the table frame are synchronously telescoped, and the two sides of the turning frame 4 are also synchronously moved, ensuring the stability of the table frame. The transmission mechanisms 502 at both ends are symmetrically arranged and synchronously driven, providing sufficient turning driving force for the turning frame 4, ensuring the smooth completion of the turning action, and making the two sides of the turning frame 4 evenly stressed, ensuring that the two ends of the turning frame 4 turn over at the same time, and preventing the turning frame 4 from twisting and deforming due to torsion. This design structure is reliable and has a high load.

[0054] The telescopic push rod 3 includes an outer tube 301 and an inner tube 302 which are sleeved together. The specific connection method thereof on the table frame is that the outer tube 301 is fixed on the mounting side plate 2, and a long through groove 301a is formed on the inner side wall of the outer tube 301. The side wall of the mounting frame 502d in the transmission mechanism 502 is fixedly connected to the side wall of the inner tube 302 and moves with the expansion and contraction of the inner tube 302. The above structure enables the transmission mechanism 502 to move with the expansion and contraction of the inner tube 302, and the mounting position of the fixing frame and the length of the long through groove 301a are determined by the required expansion and contraction and movement stroke.

[0055] In order to drive the telescopic push rod 3 more accurately and more smoothly, the telescopic push rods 3 at both ends are provided with a second screw rod, a second screw rod nut 502b sleeved on the second screw rod and moving with the rotation of the second screw rod, and the second screw rod nut 502b is connected to the inner tube 302 and drives the inner tube 302 to extend and retract. Figure 4 As shown, the telescopic push rod 3 is also provided with a second reduction gearbox 7 that drives the second screw rod to rotate. In order to make the two sides of the table frame extend and retract synchronously, a second motor 8 is provided in the middle of the table frame. The output shafts on both sides of the second motor 8 are respectively connected to the second reduction gearboxes 7 at both ends. The single motor drives the telescopic push rods 3 at both ends to extend and retract synchronously through the second reduction gearbox 7. The structure is compact and the installation is convenient.

[0056] It is understandable that, when there is no drawer under the table frame, the hinge between the driven flip member 402 and the telescopic end of the telescopic push rod 3 can also use other hinge methods with a fixed rotation center besides the four-bar hinge 9, such as a pin hinge.

[0057] Embodiment three:

[0058] like Figure 1 As shown, a table includes a desktop 001, under which is disposed a table frame 002 as in the above-mentioned embodiment 1 or embodiment 2. The desktop 001 includes a flip desktop disposed on a flip frame 4. The movement and / or flipping of the flip frame 4 drives the movement and / or flipping of the flip desktop, thereby adjusting the angle and / or position of the flip desktop.

[0059] The above is only a specific embodiment of the invention, but the protection scope of the invention is not limited thereto. Those skilled in the art should understand that the invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the invention will be included in the scope of the claims.

Claims

1. An automatic flip and retractable table frame, the table frame comprising a crossbeam and mounting side panels arranged at both ends of the crossbeam, characterized in that: The table frame is also provided with a telescopic push rod and a flip frame, the rear end of the flip frame is hinged with the telescopic end of the telescopic push rod, the telescopic push rod is provided with a flip power system that moves with the telescopic push rod, the flip power system includes a driving member that provides power for the flip frame and a transmission mechanism fixed on the telescopic push rod, the front end of the flip frame is hinged on the transmission mechanism, and the flip frame is driven to flip through the transmission mechanism; telescopic push rods are fixed on the mounting side plates at both ends, and the telescopic push rods at both ends are symmetrically arranged and driven synchronously, and transmission mechanisms are fixed on the telescopic push rods at both ends, and the transmission mechanisms at both ends are symmetrically arranged and driven synchronously; the flip frame is hinged to the longitudinal beam through a four-link hinge, and the four-link hinge includes a front swing The rear end of the flip frame is hinged to the lower end of the front swing arm and the lower end of the rear swing arm, and the front end of the longitudinal beam is hinged to the upper end of the front swing arm and the upper end of the rear swing arm. Before flipping, the front swing arm and the rear swing arm are symmetrical with respect to the vertical center axis. During the flipping process of the flip frame driven by the driving force, the longitudinal beam is fixed, so the front swing arm rotates with its upper end as the rotation center, and the rear swing arm rotates with its upper end as the rotation center. The front swing arm and the rear swing arm have different initial positions and different rotation centers, so that the movement trajectories of the lower ends of the front swing arm and the rear swing arm are different, and an angle difference is formed after rotation, so that the flip frame can complete the smooth flipping. The rear end of the flip frame and the front end of the longitudinal beam adopt a four-link hinge, two front and rear connecting arms, and four hinge points.

2. The automatic flip and retractable table frame according to claim 1, characterized in that: The telescopic push rod comprises a sleeved outer tube and an inner tube, wherein the outer tube is fixed on the mounting side plate, a long through groove is opened on the inner side wall of the outer tube, and the transmission mechanism is fixedly connected to the inner tube side wall and moves with the extension and contraction of the inner tube.

3. The automatic flip and retractable table frame according to claim 2, characterized in that: The transmission mechanism includes a first screw rod that rotates under the drive of a driving member, a first screw rod nut that is sleeved on the first screw rod and moves with the rotation of the first screw rod, and a supporting connecting member that connects the first screw rod nut and the front end of the flip frame, and the front end of the flip frame is hinged to the supporting connecting member.

4. The automatic flip and retractable table frame according to claim 3, characterized in that: A guide column for guiding the first screw nut is provided on one side of the first screw, and the first screw nut is sleeved on the guide column and slides relative to the guide column.

5. The automatic flip and retractable table frame according to claim 4, characterized in that: The transmission mechanism also includes a mounting frame, the side wall of the mounting frame is fixedly connected to the side wall of the inner tube, the first screw rod is arranged in the mounting frame, and mounting blocks for mounting the first screw rod and the guide column are provided at both ends of the first screw rod.

6. The automatic flip and retractable table frame according to claim 5, characterized in that: The mounting frame is provided with a supporting member supported on the bottom side of the supporting connecting member.

7. The automatic flip and retractable table frame according to claim 1, characterized in that: The telescopic push rods at both ends include an outer tube and an inner tube that are connected in a sleeve. A second screw and a second screw nut that is sleeved on the second screw and moves with the rotation of the second screw are provided in the telescopic push rods at both ends. The second screw nut is connected to the inner tube and drives the inner tube to extend and retract. A reduction gear box that drives the second screw to rotate is also provided in the telescopic push rod. A motor is provided in the middle of the table frame. The output shafts on both sides of the motor are respectively connected to the reduction gear boxes at both ends and synchronously drive the reduction gear boxes at both ends.

8. The automatic flip and retractable table frame according to claim 1, characterized in that: A lifting column is arranged under the table frame, and the top end of the lifting column is fixedly connected to the bottom end of the table frame.

9. A table, comprising a tabletop, characterized in that: A table frame as claimed in any one of claims 1 to 8 is arranged under the table top, and the table top comprises a flip table top arranged on a flip frame.

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