Extensible table plate lifting structure

Abstract

The utility model discloses a lifting structure of an extension table board. The lifting structure aims to overcome the defect that the potential safety hazard that hands are clamped exists in the using process of an extension table. The table comprises side table plates installed on the left side and the right side of a table frame and a middle table plate installed in the middle of the table frame, the side table plates are arranged in a transverse moving mode, the middle table plate is arranged in a lifting mode, and a lifting piece is installed between the middle table plate and the table frame and limits the lifting track of the middle table plate; after stretching, the side table plates on the two sides extend out of the left side and the right side of the table frame respectively, and the middle table plate is arranged between the two side table plates; and after being recycled, the side table plates on the two sides and the middle table plate are stacked. According to the extension table board lifting structure, lifting operation of the middle table board is facilitated, and the phenomenon of hand clamping is not prone to occurring in the operation process.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of furniture, more specifically, it relates to a kind of extension table board lifting structure. BACKGROUND

[0002] At present, the length of common table is fixed, if longer table is selected, it occupies large space, if shorter table is selected, it is easy to crowd when the number of users is more. In order to meet various use requirements, there are many stretch tables on the market, by pulling apart two table panels respectively, the middle table is flipped and matched with the table panel, if one side of the table panel is not pulled into place, the middle table is flipped, there is a safety hazard of pinching hand. UTILITY MODEL CONTENT

[0003] In order to overcome the above shortcomings, the utility model provides an extension table board lifting structure, which facilitates the lifting operation of the middle table panel and is not prone to pinching hand during operation.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme: an extension table board lifting structure, including side table panels installed on the left and right sides of a table frame and a middle table panel installed in the middle of the table frame, the side table panels are horizontally movable, the middle table panel is vertically movable, a lifting device is installed between the middle table panel and the table frame, and the lifting device limits the lifting track of the middle table panel; after extension, the side table panels on both sides extend out of the left and right sides of the table frame, and the middle table panel is placed between the two side table panels; after retraction, the side table panels on both sides and the middle table panel are stacked.

[0005] The side table panels are arranged on the left and right sides of the table frame, and the side table panels can move left and right, while the middle table panel can be lifted. During retraction, the middle table panel is lifted and moved to misalign the middle table panel and the side table panels vertically, and then the side table panels on both sides are pushed towards the middle to be close to each other, so that the side table panels and the middle table panel are stacked to reduce the occupied space. During extension, the side table panels on both sides stacked with the middle table panel are pulled to the left and right sides respectively, and after being pulled into place, the middle table panel is lifted and moved so that the left and right sides of the middle table panel are aligned with the edges of the side table panels. In the technical scheme of the present application, the middle table panel is lifted and moved to misalign the middle table panel and the side table panels, and the side table panels are pulled in the misaligned state, which avoids the safety hazard of pinching hand.

[0006] The extension table board lifting structure of the present application facilitates the lifting operation of the middle table panel and is not prone to pinching hand during operation.

[0007] Preferably, sliding grooves are arranged on the front and back sides of the table frame, and the front and back sides of the side table panels are respectively connected with the sliding grooves.

[0008] During sliding of the side table panels, the front and back sides of the side table panels move along the sliding grooves, which is stable and reliable.

[0009] Preferably, at least two slide columns are arranged on the front and back sides of the side table board, and the slide columns are movably inserted into the slide grooves to support the side table board.

[0010] The side table board is connected with the slide grooves through the slide columns, and the slide grooves support the whole side table board. During the pushing and pulling of the side table board, the slide columns slide along the slide grooves stably and reliably.

[0011] Preferably, the side table board and the middle table board each include a frame and a table top plate, and the table top plate is mounted on the frame.

[0012] The side table board and the middle table board have good structural strength and are not easy to deform.

[0013] Preferably, an upwardly extending protruding rib is arranged on the outer edge of the frame, the outer edge of the table top plate is abutted against the sidewall of the protruding rib, a plurality of horizontal ribs and a plurality of vertical ribs are connected in the frame, and the horizontal ribs and the vertical ribs support the table top plate.

[0014] The upward extension of the protruding rib positions the table top plate, and ensures accurate and reliable installation of the table top plate. The horizontal ribs and the vertical ribs support the table top plate, and ensure the reliability of the installation of the table top plate.

[0015] In another scheme, a plurality of support rods are arranged in the frame, the upper surface of the support rod is lower than the upper edge of the frame, and the table top plate is supported on the support rod and is tightly connected with the support rod.

[0016] The support rod supports and fixes the table top plate.

[0017] In scheme one, the lifting member includes a straight-slot sliding block and a fixed pin, the straight-slot sliding block is tightly connected to the front and back sides of the middle table board, an L-shaped slide groove is arranged on the straight-slot sliding block, an upwardly extending positioning groove is arranged at the lower end of the slide groove, the fixed pin and the straight-slot sliding block are correspondingly mounted on the table frame, the fixed pin is inserted into the slide groove in a matched manner, and the fixed pin is positioned in the positioning groove.

[0018] In this scheme, during the upward movement of the middle table board, the straight-slot sliding block moves together with the middle table board, the slide groove and the fixed pin slide relative to each other, the middle table board is first pulled upward, and then is moved horizontally, so that the positioning groove and the fixed pin are tightly connected together. At this time, the middle table board is moved upward to the position, and since the positioning groove is upwardly extended, the middle table board will not shake horizontally. Then, the side table boards on the two sides can be adjusted to the position, so that the edges of the side table boards are aligned with the edges of the middle table board.

[0019] During the downward movement of the intermediate table board, the table board is first moved horizontally to separate the positioning groove from the fixing pin, and when the sliding groove corner is moved to the position of the fixing pin, the intermediate table board is caused to slide downward under the action of gravity. Then the side table boards on the two sides can be pushed toward the middle to achieve recycling.

[0020] In scheme two, the lifting member includes an arc-shaped fixing block and a guide column, the guide column is fastened and connected to the front and rear sides of the intermediate table board, the arc-shaped fixing block is provided with an arc-shaped guide groove, the upper end of the arc-shaped guide groove is provided with a downwardly extending support groove, the arc-shaped fixing block and the guide column are correspondingly installed on the table frame, the guide column is adaptively inserted into the arc-shaped guide groove, and the guide column is positioned at the support groove.

[0021] When the intermediate table board is in the low position, the guide columns on the front and rear sides of the intermediate table board are supported at the lower end of the arc-shaped guide groove, and the side table boards on the two sides are close to each other to achieve recycling. When the intermediate table board is moved upward, the guide columns on the front and rear sides of the intermediate table board are moved upward along the arc-shaped guide groove to the support groove to achieve support and positioning. At this time, the intermediate table board is in the high position, and then the side table boards on the two sides are pushed outward, so that the edges of the side table boards are aligned with the edges of the intermediate table board, and the side table boards are extended for use.

[0022] In scheme three, the lifting member includes a straight groove fixing block and a sliding pin, the sliding pin is fastened and connected to the front and rear sides of the intermediate table board, the straight groove fixing block is provided with an inverted L-shaped guide groove, the upper end of the guide groove is provided with a downwardly extending clamping groove, the straight groove fixing block and the sliding pin are correspondingly installed on the table frame, the sliding pin is adaptively inserted into the guide groove, and the sliding pin is positioned at the clamping groove.

[0023] When the intermediate table board is in the low position, the sliding pins on the front and rear sides of the intermediate table board are supported at the lower end of the guide groove, and the side table boards on the two sides are close to each other to achieve recycling. When the intermediate table board is moved upward, the sliding pin is first moved upward to the corner position of the guide groove, and then the intermediate table board is moved horizontally, so that the sliding pin is clamped to the clamping groove to achieve positioning. At this time, the intermediate table board is in the high position, and then the side table boards on the two sides are pushed outward, so that the edges of the side table boards are aligned with the edges of the intermediate table board, and the side table boards are extended for use.

[0024] In scheme four, the lifting member includes a fixing seat, a lifting seat and a lifting frame, the lifting frame includes two lifting rods which are hingedly connected together in an "X" shape, the fixing seat is fastened and connected to the table frame, the lifting seat is fastened and connected to the intermediate table board, the fixing seat and the lifting seat are both provided with a recess groove, a sliding seat is installed in the recess groove, one lifting rod is hingedly connected to the lifting seat and one sliding seat, and the other lifting rod is hingedly connected to the fixing seat and the other sliding seat.

[0025] The middle table plate moves downward, the lifting seat moves downward along with the middle table plate, the lifting rod rotates, the sliding seat slides in the let-place groove, the middle table plate moves to the low position, and the two side table plates are pushed to the direction of approaching each other, and the stacking recovery is realized. The middle table plate moves upward, the lifting seat moves upward along with the middle table plate, the lifting rod rotates, the sliding seat slides in the let-place groove, the middle table plate moves to the high position, the two side table plates are pushed outward, the edge of the side table plate is aligned with the edge of the middle table plate, and the side table plate is extended for use.

[0026] Compared with the prior art, the beneficial effects of the utility model are that (1) the extension table plate lifting structure is convenient for lifting operation of the middle table plate, and the hand clamping phenomenon is not prone to occur in the operation process; (2) the middle table plate is stably and reliably lifted and moved, and the side table plate is stably and reliably transversely moved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the structural schematic diagram of embodiment 1 and embodiment 4 of the utility model.

[0028] Figure 2 It is the frame connection schematic diagram of embodiment 1 of the utility model.

[0029] Figure 3 It is the frame connection partial view of embodiment 1 of the utility model.

[0030] Figure 4 It is the structure diagram of the straight groove sliding block of the utility model.

[0031] Figure 5 It is the structural schematic diagram of embodiment 2 and embodiment 3 of the utility model.

[0032] Figure 6 It is the frame connection schematic diagram of embodiment 2 of the utility model.

[0033] Figure 7 It is the frame connection partial view of embodiment 2 of the utility model.

[0034] Figure 8 It is the structure diagram of the arc-shaped fixed block of the utility model.

[0035] Figure 9 It is the frame connection partial view of embodiment 3 of the utility model.

[0036] Figure 10 It is the structure diagram of the straight groove fixed block of the utility model.

[0037] Figure 11 It is the frame connection schematic diagram of embodiment 4 of the utility model.

[0038] Figure 12It is a structural diagram of the lifting member of Example 4 of the present utility model.

[0039] In the figure: 1. table frame, 2. side table board, 3. middle table board, 4. supporting foot, 5. sliding groove, 6. sliding column, 7. horizontal slide rail, 8. longitudinal support rod, 9. frame, 10. table top, 11. convex rib, 12. horizontal rib rod, 13. longitudinal rib rod, 14. locking tongue, 15. lock, 16. supporting column, 17. supporting longitudinal beam, 18. straight groove sliding block, 19. fixing pin, 20. sliding groove, 21. positioning groove, 22. supporting rod, 23. connecting hole, 24. snap lock, 25. arc-shaped fixing block, 26. guide column, 27. arc-shaped guide groove, 28. supporting groove, 29. straight groove fixing block, 30. sliding pin, 31. guide groove, 32. card slot, 33. fixing seat, 34. lifting seat, 35. lifting frame, 36. clearance slot, 37. sliding seat. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0041] Example 1: An extension table lifting structure (see attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 ), including side table panels 2 installed on the left and right sides of the table frame 1 and a middle table panel 3 installed in the middle of the table frame 1. Several supporting legs 4 are fastened to the table frame 1. The table frame 1 is a rectangular frame structure, and each corner of the table frame 1 is fastened to a supporting leg 4. The side table panels 2 are arranged to move laterally, and the middle table panel 3 is arranged to move up and down. A lifting member is installed between the middle table panel 3 and the table frame 1, and the lifting member defines the lifting trajectory of the middle table panel 3; after extension, the side table panels 2 on both sides extend out of the left and right sides of the table frame 1 respectively, and the middle table panel 3 is placed between the side table panels 2 on both sides; after retraction, the side table panels 2 on both sides and the middle table panel 3 are stacked.

[0042] The table frame 1 has sliding grooves 5 on both its front and rear sides, and the side panels 2 are slidably connected to the two sliding grooves 5 on their front and rear sides. At least two slide posts 6 are provided on both the front and rear sides of the side panels 2, which are movably inserted into the sliding grooves 5 to support the side panels 2. Transverse rails 7 are provided on both the front and rear sides of the table frame 1, and longitudinal support rods 8 are provided on both the left and right sides of the table frame 1, which are arranged lower than the transverse rails 7. The transverse rails 7 are provided with sliding grooves 5, and two slide posts 6 are provided on both the front and rear sides of the side panels 2.

[0043] The side table panels 2 and the middle table panel 3 both include a frame 9 and a table top panel 10, and the table top panel 10 is mounted on the frame 9. An upwardly extending rib 11 is provided on the outer edge of the frame 9, and the outer edge of the table top panel 10 abuts against the side wall of the rib 11. A plurality of transverse ribs 12 and a plurality of longitudinal ribs 13 are connected inside the frame 9, and the transverse ribs 12 and the longitudinal ribs 13 support the table top panel 10. The upwardly extending ribs 11 play a role in positioning the table top panel 10, ensuring that the table top panel 10 is installed accurately and reliably. The transverse ribs 12 and the longitudinal ribs 13 support the table top panel 10, ensuring the reliability of the installation of the table top panel 10.

[0044] A locking tongue 14 is installed at the bottom of the side panel 2, and a locking catch 15 is installed on the table frame 1. After the side panel 2 is retracted, the locking catch 15 is moved to lock it with the locking tongue 14, thereby securing the side panel 2. Support columns 16 are installed on both sides of the middle panel 3, and supporting beams 17 are provided on the table frame 1 and on both sides of the middle panel 3. When the middle panel 3 is in the upper position, the support columns 16 are supported on the supporting beams 17.

[0045] The lifting parts include a straight groove sliding block 18 and a fixing pin 19. The front and rear sides of the middle table board 3 are fastened with two straight groove sliding blocks 18. An L-shaped sliding groove 20 is provided on the straight groove sliding block 18. The lower end of the sliding groove 20 is provided with a positioning groove 21 extending upward. The fixing pin 19 and the straight groove sliding block 18 are correspondingly installed on the table frame 1. The fixing pin 19 is adapted to be inserted into the sliding groove 20. When the middle table board 3 is in a high position, the fixing pin 19 is placed in the positioning groove 21 to achieve positioning.

[0046] As the middle table panel 3 moves upward, the straight-groove slide block 18 moves with it, and the slide slot 20 slides against the fixing pin 19. First, manually pull the middle table panel 3 upward, then move it horizontally so that the positioning slot 21 and the fixing pin 19 are aligned and engaged. At this point, the middle table panel 3 moves upward into position. Because the positioning slot 21 extends upward, the middle table panel 3 does not wobble laterally. The side panels 2 on either side can then be adjusted into position, aligning their edges with those of the middle panel 3. The side panels 2 and middle panel 3 can then be screwed together.

[0047] During the downward movement of the middle table panel 3, the middle table panel 3 is first moved horizontally until the fixing pin 19 is placed in the corner position of the slide groove 20. At this time, under the action of gravity, the middle table panel 3 moves downward until the middle table panel 3 is placed in the low position, pushing the side table panels 2 towards each other to achieve stacking and recycling.

[0048] Example 2: An extension table lifting structure (see attached Figure 5 , Attachment Figure 6 , Attachment Figure 7 , Attachment Figure 8), including the side table plate 2 installed on the left and right sides of the table frame 1 and the middle table plate 3 installed in the middle of the table frame 1. A plurality of support feet 4 are fastened and connected on the table frame 1, the table frame 1 is in a rectangular frame structure, and one support foot 4 is fastened and connected at each corner position of the table frame 1. The side table plate 2 is transversely movably arranged, and the middle table plate 3 is vertically movably arranged. A lifting piece is installed between the middle table plate 3 and the table frame 1, and the lifting piece defines a lifting track of the middle table plate 3. After extension, the two side table plates 2 extend out of the left and right sides of the table frame 1, and the middle table plate 3 is arranged between the two side table plates 2. After retraction, the two side table plates 2 and the middle table plate 3 are arranged in a stacked manner.

[0049] Sliding grooves 5 are arranged on the front and rear sides of the table frame 1, and the front and rear sides of the side table plate 2 are respectively slidably connected with the two sliding grooves 5. At least two sliding columns 6 are arranged on the front and rear sides of the side table plate 2, and the sliding columns 6 are movably inserted into the sliding grooves 5 to support the side table plate 2. Transverse sliding rails 7 are arranged on the front and rear sides of the table frame 1, and longitudinal support rods 8 are arranged on the left and right sides of the table frame 1, and the longitudinal support rods 8 are arranged lower than the transverse sliding rails 7. The sliding grooves 5 are arranged on the transverse sliding rails 7, and two sliding columns 6 are arranged on the front and rear sides of the side table plate 2.

[0050] The side table plate 2 and the middle table plate 3 each include a frame 9 and a table plate 10, and the table plate 10 is installed on the frame 9. A plurality of support rods 22 are arranged in the frame 9, the upper surfaces of the support rods 22 are lower than the upper edges of the frame 9, and the table plate 10 is supported on the support rods 22 and is fastened and connected with the support rods 22. The support rods 22 are arranged transversely, a plurality of connecting holes 23 are arranged on the support rods 22, connecting screws are connected between the connecting holes 23 and the table plate 10. A snap lock 24 is installed on the table frame 1, and after the side table plate 2 is extended outward or retracted inward to a position, the snap tongue of the snap lock 24 is inserted into the connecting hole 23, which can preferably position the side table plate 2.

[0051] The lifting piece includes an arc-shaped fixed block 25 and a guide column 26, and two guide columns 26 are fastened and connected on the front and rear sides of the middle table plate 3. An arc-shaped guide groove 27 is arranged on the arc-shaped fixed block 25, and a support groove 28 extending downward is arranged at the upper end of the arc-shaped guide groove 27. The arc-shaped fixed block 25 and the guide column 26 are correspondingly installed on the table frame 1, the guide column 26 is inserted into the arc-shaped guide groove 27, and when the middle table plate 3 is in a high position, the guide column 26 is positioned at the support groove 28.

[0052] When the intermediate table board 3 is in the low position, the guide columns 26 on the front and back sides of the intermediate table board 3 are supported at the lower end of the arc-shaped guide groove 27, the intermediate table board 3 and the side table boards 2 are vertically staggered, and the two side table boards 2 are close to each other to achieve recycling. When the intermediate table board 3 moves upward, the guide columns 26 on the front and back sides of the intermediate table board 3 move upward along the arc-shaped guide groove 27 to the support groove 28 to achieve support and positioning. At this time, the intermediate table board 3 is in the high position, the intermediate table board 3 and the side table boards 2 are close in height, and then the two side table boards 2 are adjusted to the position, so that the edges of the side table boards 2 are aligned with the edges of the intermediate table board 3, and the side table boards 2 are extended for use.

[0053] Embodiment 3: an extension table board lifting structure (see attached Figure 5 , attached Figure 9 , attached Figure 10 ), including side table boards 2 installed on the left and right sides of the table frame 1 and an intermediate table board 3 installed in the middle of the table frame 1. A plurality of support feet 4 are fastened and connected on the table frame 1, the table frame 1 is in the shape of a rectangular frame, and one support foot 4 is fastened and connected at each corner position of the table frame 1. The side table boards 2 are horizontally movable, the intermediate table board 3 is vertically movable, a lifting piece is installed between the intermediate table board 3 and the table frame 1, and the lifting piece defines the lifting track of the intermediate table board 3; the two side table boards 2 extend out of the left and right sides of the table frame 1 after extension, and the intermediate table board 3 is positioned between the two side table boards 2; the two side table boards 2 and the intermediate table board 3 are stacked after recycling.

[0054] The table frame 1 is provided with sliding grooves 5 on the front and back sides, and the front and back sides of the side table boards 2 are respectively connected with the two sliding grooves 5. At least two sliding columns 6 are provided on the front and back sides of the side table boards 2, and the sliding columns 6 are movably inserted into the sliding grooves 5 to support the side table boards 2. The table frame 1 is provided with horizontal sliding rails 7 on the front and back sides, and the table frame 1 is provided with vertical support rods 8 on the left and right sides, which are lower than the horizontal sliding rails 7. The horizontal sliding rails 7 are provided with sliding grooves 5, and the front and back sides of the side table boards 2 are provided with two sliding columns 6.

[0055] The side table boards 2 and the intermediate table board 3 each include a frame 9 and a table board 10, and the table board 10 is installed on the frame 9. A plurality of support rods 22 are arranged in the frame 9, the upper surface of the support rod 22 is lower than the upper edge of the frame 9, and the table board 10 is supported on the support rod 22 and is fastened and connected with the support rod 22. The support rods 22 are horizontally arranged, a plurality of connecting holes 23 are arranged on the support rods 22 at intervals, and connecting screws are connected between the connecting holes 23 and the table board 10. The table frame 1 is provided with a snap lock 24, and after the side table boards 2 are extended outward or inward to the position, the snap lock 24 is inserted into the connecting hole 23, which can preferably position the side table boards 2.

[0056] The lifting member comprises a straight slot fixing block 29 and a sliding pin 30, the sliding pin 30 is fixedly connected to the front and rear sides of the middle table plate 3, the straight slot fixing block 29 is provided with a reverse L-shaped guide slot 31, the upper end of the guide slot 31 is provided with a downwardly extending clamping slot 32, the straight slot fixing block 29 and the sliding pin 30 are correspondingly installed on the table frame 1, the sliding pin 30 and the guide slot 31 are adaptively inserted, and when the middle table plate 3 is in the high position, the sliding pin 30 is positioned at the clamping slot 32.

[0057] When the middle table plate 3 is in the low position, the sliding pins 30 on the front and rear sides of the middle table plate 3 are supported at the lower end of the guide slot 31, the middle table plate 3 and the side plate table plate are vertically staggered, and the two side table plates 2 are close to each other to realize recycling. When the middle table plate 3 moves upward, the sliding pin 30 first moves upward to the corner position of the guide slot 31, then moves the middle table plate 3 horizontally, and then the sliding pin 30 is clamped to the clamping slot 32 to realize positioning. At this time, the middle table plate 3 is in the high position, then the two side table plates 2 are adjusted to the position, so that the edges of the side table plates 2 are aligned with the edges of the middle table plate 3, and the side table plates 2 are extended for use.

[0058] Embodiment 4: an extension table plate lifting structure (see attached Figure 1 , attached Figure 11 , attached Figure 12 ), comprising side table plates 2 installed on the left and right sides of the table frame 1 and a middle table plate 3 installed in the middle of the table frame 1. A plurality of support feet 4 are fixedly connected to the table frame 1, the table frame 1 has a rectangular frame structure, and one support foot 4 is fixedly connected to each corner of the table frame 1. The side table plates 2 are horizontally movable, the middle table plate 3 is vertically movable, a lifting member is installed between the middle table plate 3 and the table frame 1, and the lifting member defines the lifting track of the middle table plate 3; the two side table plates 2 are extended to the left and right sides of the table frame 1 after extension, and the middle table plate 3 is arranged between the two side table plates 2; the two side table plates 2 and the middle table plate 3 are stacked after being retracted.

[0059] The table frame 1 is provided with sliding grooves 5 on the front and rear sides, and the side table plates 2 are respectively slidably connected to the sliding grooves 5 on the front and rear sides. At least two slide columns 6 are arranged on the front and rear sides of the side table plates 2, and the slide columns 6 are movably inserted into the sliding grooves 5 to support the side table plates 2. The table frame 1 is provided with horizontal sliding rails 7 on the front and rear sides, and the table frame 1 is provided with longitudinal support rods 8 on the left and right sides, which are arranged lower than the horizontal sliding rails 7. The horizontal sliding rails 7 are provided with sliding grooves 5, and the side table plates 2 are provided with two slide columns 6 on the front and rear sides.

[0060] The side table plate 2 and the middle table plate 3 each comprise a frame 9 and a table top plate 10, and the table top plate 10 is mounted on the frame 9. The frame 9 is provided with upwardly extending ribs 11 at the outer edges, and the outer edges of the table top plate 10 are abutted against the side walls of the ribs 11. A plurality of horizontal bars 12 and a plurality of vertical bars 13 are connected to the frame 9, and the horizontal bars 12 and the vertical bars 13 support the table top plate 10. The upward extension of the ribs 11 serves to position the table top plate 10, thereby ensuring accurate and reliable mounting of the table top plate 10. The horizontal bars 12 and the vertical bars 13 support the table top plate 10, thereby ensuring the reliability of the mounting of the table top plate 10.

[0061] The side table plate 2 is provided with a locking tongue 14 at the bottom, and the table frame 1 is provided with a locking catch 15. When the side table plate 2 is returned to the position, the locking catch 15 is actuated to lock the locking catch 15 and the locking tongue 14 together, thereby positioning the side table plate 2. The middle table plate 3 is provided with support columns 16 at the left and right sides, and the table frame 1 and the two sides of the middle table plate 3 are provided with corresponding support beams 17. When the middle table plate 3 is in the high position, the support columns 16 are supported on the support beams 17.

[0062] The lifting member comprises a fixed seat 33, a lifting seat 34 and a lifting frame 35. The lifting frame 35 comprises two lifting rods which are hinged together in an "X" shape. The fixed seat 33 is fixedly connected to the table frame 1, and the lifting seat 34 is fixedly connected to the middle table plate 3. The fixed seat 33 and the lifting seat 34 are each provided with a clearance slot 36, and a sliding seat 37 is mounted in the clearance slot 36. One lifting rod is hinged to the lifting seat 34 and one sliding seat 37, and the other lifting rod is hinged to the fixed seat 33 and the other sliding seat 37. The sliding seat 37 has a circular structure, and a plurality of protrusions are arranged on the side walls of the clearance slot 36, thereby forming a plurality of clamping positions in the clearance slot 36 which are adapted to the sliding seat 37. When the middle table plate 3 is in the highest position and the lowest position, the sliding seat 37 is clamped in the clamping position, thereby positioning the middle table plate 3.

[0063] When the middle table plate 3 moves downward, the lifting seat 34 moves downward together with the middle table plate 3, the lifting rods rotate, and the sliding seat 37 slides in the clearance slot 36. When the middle table plate 3 moves to the low position, the middle table plate 3 and the side table plate 2 are vertically misaligned, and the two side table plates 2 are pushed toward each other, thereby achieving stacking and recycling. When the middle table plate 3 moves upward, the lifting seat 34 moves upward together with the middle table plate 3, the lifting rods rotate, and the sliding seat 37 slides in the clearance slot 36. When the middle table plate 3 moves to the high position, the two side table plates 2 are adjusted to the position, the edges of the side table plates 2 are aligned with the edges of the middle table plate 3, and the side table plates 2 are extended for use.

[0064] The above-described embodiments are only the preferred embodiments of the present application, and do not limit the present application in any form. Other variants and modifications can be made without departing from the technical solutions recited in the claims.

Claims

1. An extended table top lifting structure, characterized in that: It includes side table panels installed on the left and right sides of the table frame and a middle table panel installed in the middle of the table frame. The side table panels are set to move horizontally, and the middle table panel is set to move up and down. A lifting component is installed between the middle table panel and the table frame, and the lifting component limits the lifting trajectory of the middle table panel; after extension, the side table panels on both sides extend out of the left and right sides of the table frame respectively, and the middle table panel is placed between the side table panels on both sides; after retraction, the side table panels on both sides and the middle table panel are stacked.

2. The extension table top lifting structure according to claim 1, characterized in that: Sliding grooves are arranged on the front and rear sides of the table frame, and the front and rear sides of the side table boards are respectively slidably connected with the two sliding grooves.

3. The extension table top lifting structure according to claim 2, characterized in that: At least two sliding columns are provided on the front and rear sides of the side table board, and the sliding columns are movably inserted in the sliding grooves to support the side table board.

4. The extension table top lifting structure according to claim 1, characterized in that: The side table panels and the middle table panel both include a frame and a table top panel, and the table top panel is mounted on the frame.

5. The extension table top lifting structure according to claim 4, characterized in that: The outer edge of the frame is provided with an upwardly extending rib, the outer edge of the table top is close to the side wall of the rib, and a plurality of transverse ribs and a plurality of longitudinal ribs are connected in the frame, and the transverse ribs and the longitudinal ribs support the table top.

6. The extension table top lifting structure according to claim 4, characterized in that: A plurality of support rods are arranged in the frame, the upper surfaces of the support rods are lower than the upper edges of the frame, and the desktop plate is supported on the support rods and is firmly connected to the support rods.

7. The extension table top lifting structure according to any one of claims 1 to 6, characterized in that: The lifting parts include a straight groove sliding block and a fixing pin. The front and rear sides of the middle table board are fastened with the straight groove sliding blocks. An L-shaped sliding groove is provided on the straight groove sliding block, and an upward extending positioning groove is provided at the lower end of the sliding groove. The fixing pin and the straight groove sliding block are correspondingly installed on the table frame. The fixing pin is adapted to be inserted into the sliding groove, and the fixing pin is placed in the positioning groove to achieve positioning.

8. The extension table top lifting structure according to any one of claims 1 to 6, characterized in that: The lifting parts include an arc-shaped fixing block and a guide column. The front and rear sides of the middle table board are fastened with guide columns. An arc-shaped guide groove is provided on the arc-shaped fixing block. A support groove extending downward is provided at the upper end of the arc-shaped guide groove. The arc-shaped fixing block and the guide column are correspondingly installed on the table frame. The guide column is adapted to be inserted into the arc-shaped guide groove, and the guide column is placed in the support groove to achieve positioning.

9. The extension table top lifting structure according to any one of claims 1 to 6, characterized in that: The lifting parts include a straight groove fixing block and a sliding pin. The front and rear sides of the middle table board are fastened with sliding pins. An inverted L-shaped guide groove is provided on the straight groove fixing block. A downward-extending card slot is provided at the upper end of the guide groove. The straight groove fixing block and the sliding pin are correspondingly installed on the table frame. The sliding pin and the guide groove are adapted for insertion, and the sliding pin is placed in the card slot to achieve positioning.

10. The extension table top lifting structure according to any one of claims 1 to 6, characterized in that: The lifting parts include a fixed seat, a lifting seat and a lifting frame. The lifting frame includes two lifting rods hinged together in an "X" shape. The fixed seat is fastened to the table frame, and the lifting seat is fastened to the middle table board. Both the fixed seat and the lifting seat are provided with a makeshift groove, and a slide is installed in the makeshift groove. One lifting rod is hinged to the lifting seat and a slide respectively, and the other lifting rod is hinged to the fixed seat and the other slide respectively.

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