A reversible desk and its combination with a desk chair

Abstract

The application discloses a reversible desk and a desk and chair combination thereof, which is provided with a support seat facilitating stable placement, and the inner surface of the support seat is telescopically connected with a support rod, and the inner surface of the support rod is pivotally connected with a fixing seat; the desk side plate is installed on the upper surface end of the fixing seat, the inner surface left side of the support rod is slidingly connected with a moving block, and the outer surface of the moving block is pivotally connected with a push rod. The reversible desk and the desk and chair combination thereof are provided with the support seat, can effectively form the base support of the desk, effectively adjust the fixing seat of the support rod assembly, effectively position and support the desk side plate, and cooperate with the cooperation of the moving block and the push rod assembled on the inner side of the support rod, so that the desk side plate and the desk main plate are simultaneously adjusted in angle, and the desk main plate and the desk side plate can also be mutually adjusted in angle, the desk side plate is convenient for stably supporting the use of flat objects, and the mutual influence between the objects and the desktop is prevented.

Description

Technical Field

[0001] This invention relates to the field of school desks and chairs technology, specifically to a flip-up school desk and its combination with school desks and chairs. Background Technology

[0002] When in use, school desks and chairs can be divided into tables and seats. Depending on the usage requirements and existing technology, the desks can be manufactured to be adjustable in terms of angle and height to accommodate different users. However, there are still some problems with the existing school desks and chairs.

[0003] In the prior art, the patent publication (announcement) number CN108523444A, entitled "A flip-up desk and its combination with a desk and chair", includes desk legs, drawers, and a desktop. The desk legs are connected to both sides of the drawer through a four-bar linkage consisting of a first fixed plate, a first connecting rod, a second connecting rod, and a third connecting rod. The first fixed plate is provided with a first sliding groove, the first connecting rod is provided with a first limiting pin, and the first fixed plate is provided with a limiting block below the third connecting rod. The drawer is fixed to the second connecting rod. When the desktop is tilted, primary and secondary school students can lean back or lie on the desktop to sleep. However, when in use, the entire desktop is flipped, which is inconvenient for placing items that can only be placed flat, and it is easy for objects to fall and be damaged. In addition, it is not convenient to automatically adjust the seat angle, which can easily cause the seat angle to tilt excessively after adjustment.

[0004] In addition, in the existing technology, the "integrated rotatable desk and chair" authorized by CN204071042U consists of a mounting base, a chair support frame, a desk, a drawer, a seat surface, and armrests. The front seat and the back desk are connected by the mounting base, bolts, nuts, elastic ball bearings, base pins, thrust bearings, and chair support frame to form a rotating mechanism; the desk, desk connecting rod, upper and lower pins of the connecting rod, and chair support frame are connected to form a four-bar linkage.

[0005] The publication (announcement) number CN112568614A describes a "flip-up desk" comprising a book tray, a desktop, and a backrest. Table legs are fixed to the side panels, with the upper half of each leg having a "U"-shaped cross-section and being snapped onto the side panels. The table legs are also "I"-shaped. The desktop is fixed to the top of the two side panels. A book tray is positioned between the two table legs. Grooves are rotatably connected to the book tray at both ends. The upper end of each groove is rotatably connected to the bottom front surface of the desktop. A sliding groove is formed along the length of each groove, and a first and second connecting rod are slidably connected within the groove. This desk can adapt to various teaching modes. Due to its flexible flip-up structure, it eliminates the need for a separate discussion room, saving considerable space and time. However, it is inconvenient to adjust the angle according to user requirements during use, and the stability of the desktop may be affected. Summary of the Invention

[0006] The present application aims to provide a reversible desk and its combination with a desk chair to solve the problems of the whole desk board being flipped over during use, the inconvenience of placing only flat objects, the easy damage of objects falling, and the inconvenience of automatic adjustment of the angle of the chair, and the easy over-tilting of the angle of the chair after adjustment.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a reversible desk and its combination with a desk chair, which is provided with a support seat for stable placement, and the inner surface of the support seat is connected with a support rod in an extension mode, and the inner surface of the support rod is connected with a fixing seat in an axial rotation mode;

[0008] It comprises a desk side plate installed on the upper surface end of the fixing seat, the inner surface of the support rod is connected with a moving block in a sliding mode on the left side, the outer surface of the moving block is connected with a push rod in a rotation mode, and the inner surface of the push rod is connected with the lower surface of the desk side plate in a rotation mode on the upper side;

[0009] An auxiliary assembly is connected to the outer surface right side of the support rod in a rotation mode, the inner surface of the auxiliary assembly is connected with a compression spring in a nesting mode, the inner surface of the auxiliary assembly is connected with an auxiliary rod in an extension mode, and the inner surface of the desk side plate is installed with a clamping strip in a clamping mode;

[0010] A nesting strip is installed on the inner surface of the clamping strip and is connected to the outer surface side edge of the desk side plate in a nesting mode, the right side of the inner surface of the desk side plate is connected with a positioning shaft in a rotation mode, and the outer surface of the other side of the positioning shaft is connected with a desk main plate in a rotation mode.

[0011] Preferably, the desk side plate is centrally positioned and rotated by the fixing seat and the support rod, the support rod is connected with the moving block in a limiting movement structure by a threaded rod, the moving block is connected with the desk side plate in a linkage rotation structure by the push rod, and the push rod is symmetrically arranged about the middle segment of the outer surface of the support seat.

[0012] Through the above structure, it is convenient to stably support in a symmetrical manner during use, and the angle adjustment of the desk side plate is controlled by the cooperation of the moving block and the push rod, and the angle of the desk main plate is simultaneously controlled by the desk side plate.

[0013] Preferably, the auxiliary assembly is connected with the support rod in a rotation structure, the auxiliary assembly is connected with the auxiliary rod in an elastic extension structure by the compression spring, and the support rod is connected with the desk side plate in an elastic support arrangement on the right side of the outer surface by the auxiliary assembly and the auxiliary rod.

[0014] Through the above structure, it is convenient to improve the stability of the desk side plate when it is used in parallel with the ground, and prevent the desk side plate and the desk main plate from sinking on the side.

[0015] Preferably, the nested strip and the clamping strip form a limiting clamping structure with the table side plate and the table main plate, and the table main plate and the table side plate form a positioning rotary arrangement through a positioning shaft, and the nested strip and the clamping strip form an integrated structure.

[0016] Through the above structure, the nested strip is effectively matched in use to prevent excessive friction between the table main plate and the table side plate when the table main plate and the table side plate rotate, and to improve the service life of the connection between the two.

[0017] Preferably, the inner surface of the table main plate is nested with a rack one, the inner surface of the table main plate is slidingly connected with a moving seat, the inner surface of the moving seat is rotatably connected with a straight tooth gear one, the straight tooth gear one is engaged with the lower side of the rack one, the outer surface of the moving seat is rotatably connected with a connecting rod, the other side of the connecting rod is rotatably connected with the inner surface of the table side plate, the lower surface of the table side plate is nested with a support block, and the upper surface of the support block is attached with the table main plate.

[0018] Through the above structure, the table side plate and the table main plate can be stably limited and moved to control the angle adjustment, thereby matching the use of the horizontal side of the table with the ground, bearing the horizontally placed objects, and improving the stability of the mutual horizontal use of the two.

[0019] Preferably, the rack one and the table main plate form an integrated structure, the table main plate and the moving seat form a sliding structure, the moving seat and the straight tooth gear one form a rotary structure, the straight tooth gear one and the rack one are engaged, the moving seat and the table side plate form a moving extrusion flip arrangement through the connecting rod, and the table side plate and the table main plate form a limiting support arrangement through the support block.

[0020] Through the above structure, the sliding adjustment of the moving seat is effectively controlled in use to improve the stability of the moving seat in use, thereby controlling the stability of the angle adjustment of the table side plate and the table main plate.

[0021] Preferably, the desk and chair combination comprises: the inner surface of the support seat is rotatably connected with a straight tooth gear two, the outer surface of the straight tooth gear two is engaged with a rack two, the outer surface of the rack two is mounted with a seat base, and the rack two is limited to slide on the inner surface of the support seat.

[0022] The upper surface of the seat base is mounted with a support frame, the upper surface end of the support frame is mounted with a seat plate, the outer surface of the seat plate is mounted with an angle piece, and the upper surface of the seat plate is attached with a sponge pad.

[0023] The outer surface of the right lower side of the seat plate is rotationally connected with an adjusting rod, the outer surface of the adjusting rod is rotationally connected with a connecting rod, the other end of the connecting rod is rotationally connected with a backrest, and the outer surface of the lower side of the backrest is rotationally connected with the inner surface of the angle piece.

[0024] Through the above structure, the table and the chair are stably assembled and the distance can be automatically adjusted, improving the convenience of use.

[0025] Preferably, the second rack is integrally connected with the left side of the outer surface of the seat base through a second spur gear, and the seat base is embeddedly installed on the lower surface of the support frame, and the support frame is integrally connected with the seat plate and the angle piece.

[0026] Through the above structure, stable horizontal movement is realized during use, and the movement stability of the seat plate on the seat base is controlled.

[0027] Preferably, the seat plate is integrally connected with the sponge pad, the seat plate is rotationally connected with the backrest through the angle piece, the sponge pad is located on the upper and lower sides of the outer surface of the backrest, and the seat plate is rotationally connected with the backrest through the adjusting rod and the connecting rod.

[0028] Through the above structure, effective angle swinging is realized during use, thereby controlling the angle of the backrest, and stable support is formed after angle adjustment, preventing excessive angle movement.

[0029] Compared with the prior art, the present application has the following advantages:

[0030] 1. The reversible desk and the combination thereof with the desk and chair are provided with a support seat, which can effectively form the base support of the desk, effectively assemble the fixed seat of the up-down adjusting support rod, effectively position and support the desk side plate, and cooperate with the moving block assembled on the inner side of the support rod and the push rod to synchronously control the simultaneous angle adjustment of the desk side plate and the desk main plate, and the desk main plate and the desk side plate can also be angle-adjusted with respect to each other, so that the desk side plate can stably support the flat object, preventing mutual influence between the object and the desk surface.

[0031] 2. The reversible desk and the combination thereof with the desk and chair are provided with an elastically adjustable auxiliary assembly and an auxiliary rod, which can form auxiliary support during the adjustment of the desk side plate, and the desk side plate is connected with the built-in movable seat of the desk main plate through the assembled connecting rod, effectively controlling the angle adjustment between the desk side plate and the desk main plate, so that the two contact surfaces are clamped with the assembled clamping strip, and the nested strip is used to improve the anti-friction connection stability between the two, and the support block installed on the desk side plate can be positioned and supported when the two are used horizontally.

[0032] 3. The reversible desk and its combination with the desk chair are provided with the second straight-toothed gear and the second rack, which can control the position of the seat base when the seat is used, and position the telescopic adjustment seat plate through the support frame installed on the upper side, effectively support the user through the bonded sponge pad, and adjust the turning angle of the backrest plate according to the user's requirements, which can effectively produce different riding experiences, and the existing headrest can be further embedded in the backrest plate to further improve the use experience. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a schematic diagram of the support seat structure of the application;

[0034] Figure 2 It is a schematic diagram of the support seat structure of the application;

[0035] Figure 3 It is a schematic diagram of the support rod structure of the application;

[0036] Figure 4 It is a schematic diagram of the support rod structure of the application; Figure 3 It is a schematic diagram of the support rod structure of the application;

[0037] Figure 5 It is a schematic diagram of the support rod structure of the application;

[0038] Figure 6 It is a schematic diagram of the support rod structure of the application;

[0039] Figure 7 It is a schematic diagram of the support rod structure of the application;

[0040] In the figure: 1, support seat; 2, support rod; 3, fixed seat; 4, desk side plate; 5, moving block; 6, push rod; 7, auxiliary component; 8, extruded spring; 9, auxiliary rod; 10, clamping strip; 11, nested strip; 12, positioning shaft; 13, desk main plate; 14, rack one; 15, moving seat; 16, straight-toothed gear one; 17, connecting rod; 18, support block; 19, straight-toothed gear two; 20, rack two; 21, seat base; 22, support frame; 23, seat plate; 24, angle piece; 25, sponge pad; 26, adjustment rod; 27, connecting rod; 28, backrest plate. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the application.

[0042] Please refer to Figures 1-7 The application provides a technical solution: a reversible desk and a combination of the desk and a chair, which is provided with a support seat 1 facilitating stable placement, and the inner surface of the support seat 1 is telescopically connected with a support rod 2, and the inner surface of the support rod 2 is pivotally connected with a fixing seat 3;

[0043] The desk includes a desk side plate 4 mounted at the upper surface end of the fixing seat 3, the inner surface of the support rod 2 is slidably connected with a moving block 5, and the outer surface of the moving block 5 is pivotally connected with a push rod 6, and the inner surface of the push rod 6 is pivotally connected with the lower surface of the desk side plate 4 at the upper side;

[0044] An auxiliary assembly 7 is pivotally connected with the outer surface of the right side of the support rod 2, the inner surface of the auxiliary assembly 7 is nestedly connected with an extrusion spring 8, and the inner surface of the auxiliary assembly 7 is telescopically connected with an auxiliary rod 9, and the inner surface of the desk side plate 4 is clampingly mounted with a clamping strip 10.

[0045] The desk side plate 4 is centrally positioned and rotated by the fixing seat 3 and the support rod 2, the support rod 2 is limitingly moved by the screw rod and the moving block 5, the moving block 5 is rotationally connected by the push rod 6 and the desk side plate 4, and the push rod 6 is symmetrically arranged about the middle section of the outer surface of the support seat 1.

[0046] The auxiliary assembly 7 is rotationally connected with the support rod 2, the auxiliary assembly 7 is elastically and telescopically connected by the extrusion spring 8 and the auxiliary rod 9, and the support rod 2 is elastically supported at the right side of the outer surface by the auxiliary assembly 7, the auxiliary rod 9 and the desk side plate 4.

[0047] In use, the height of the fixing seat 3 assembled by the support rod 2 is controlled by the support seat 1, the height of the desk side plate 4 and the desk main plate 13 connected therewith mounted by the fixing seat 3 is controlled, and when the angles of the desk side plate 4 and the desk main plate 13 are synchronously adjusted, the motor nested in the support seat 1 is controlled, the output shaft is driven to control the moving block 5 to move upward in the inner surface of the support rod 2, so that the moving block 5 drives the push rod 6 to rotate, the upper end of the push rod 6 is pivotally connected with the desk side plate 4, the fixing seat 3 assembled by the desk side plate 4 is rotationally positioned with the support rod 2, the angles of the desk side plate 4 and the desk main plate 13 can be effectively and synchronously adjusted, and when the angle of the desk side plate 4 is adjusted, the auxiliary rod 9 pivotally connected with the right lower side of the desk side plate 4 compresses the extrusion spring 8 and stores it in the lower side of the inner surface of the auxiliary assembly 7, and the elastic cooperation of the auxiliary assembly 7 and the auxiliary rod 9 forms right pushing and supporting when the desk side plate 4 is rotationally reset, so that the desk side plate 4 and the desk main plate 13 are prevented from being tilted and falling from the side.

[0048] The nested strip 11 is installed on the inner surface of the clamping strip 10, and the inner surface of the nested strip 11 is nested and connected to the outer surface side of the table side plate 4, and the inner surface right side of the table side plate 4 is rotatably connected with the positioning shaft 12, and the outer surface of the other side of the positioning shaft 12 is rotatably connected with the table main plate 13.

[0049] The nested strip 11 is rotatably connected with the table side plate 4 and the table main plate 13 through the clamping strip 10, and the table main plate 13 is rotatably connected with the table side plate 4 through the positioning shaft 12, and the nested strip 11 and the clamping strip 10 form an integrated structure.

[0050] The inner surface of the table main plate 13 is nested and connected with the rack one 14, and the inner surface of the table main plate 13 is slidably connected with the moving seat 15, and the inner surface of the moving seat 15 is rotatably connected with the straight tooth gear one 16, and the straight tooth gear one 16 is meshingly connected to the lower side of the rack one 14, and the outer surface side of the moving seat 15 is rotatably connected with the connecting rod 17, and the other side of the connecting rod 17 is rotatably connected to the inner surface of the table side plate 4, and the lower surface left side of the table side plate 4 is nested and connected with the supporting block 18, and the upper surface of the supporting block 18 is abuttingly connected with the table main plate 13.

[0051] The rack one 14 and the table main plate 13 form an integrated structure, the table main plate 13 and the moving seat 15 form a sliding structure, the moving seat 15 and the straight tooth gear one 16 form a rotating structure, the straight tooth gear one 16 and the rack one 14 are meshingly arranged, and the moving seat 15 is movably pressed and turned through the connecting rod 17 and the table side plate 4, and the table side plate 4 is limitingly supported through the supporting block 18 and the table main plate 13.

[0052] When the table side plate 4 needs to carry the horizontally placed object, the positioning shaft 12 and the table main plate 13 are rotatably connected, the built-in motor of the table main plate 13 is started, the straight tooth gear one 16 is rotated on the inner surface of the moving seat 15, the straight tooth gear one 16 is meshingly connected with the rack one 14 built-in installed in the table main plate 13, the moving seat 15 is limitingly slid on the inner surface of the table main plate 13, the connecting rod 17 rotatably assembled on the outer side of the moving seat 15 is rotatably connected with the table side plate 4, the table main plate 13 is effectively adjusted to rotate, the nested strip 11 is used in cooperation with the clamping strip 10 rotatably assembled on the table main plate 13 and the table side plate 4, the excessive friction between the table main plate 13 and the table side plate 4 is prevented, and the supporting block 18 nested and installed on the lower surface of the table side plate 4 can support the table main plate 13 and the table side plate 4 when they are used in the same horizontal position, preventing the left side of the table main plate 13 from sinking.

[0053] A desk and chair combination, comprising: a straight gear two 19 is rotatably connected to the inner surface of the lower side of the support seat 1, and the outer surface side of the straight gear two 19 is engaged with a rack two 20, and the outer surface of the rack two 20 is mounted with a seat base 21, and the rack two 20 is limited to slide on the inner surface of the support seat 1;

[0054] The upper surface of the seat base 21 is mounted with a support frame 22, and the upper surface end of the support frame 22 is mounted with a sitting plate 23, and the outer surface side of the sitting plate 23 is mounted with an angle piece 24, and the upper surface of the sitting plate 23 is connected with a sponge pad 25;

[0055] The outer surface of the sitting plate 23 is rotatably connected with an adjusting rod 26 at the lower right side, and the outer surface of the adjusting rod 26 is rotatably connected with a connecting rod 27, and the other end of the connecting rod 27 is rotatably connected with a back plate 28, and the outer surface of the back plate 28 is rotatably connected to the inner surface of the angle piece 24 at the lower side, and the outer surface of the back plate 28 is connected with the sponge pad 25.

[0056] The rack two 20 and the support seat 1 constitute a through meshing sliding structure through the straight gear two 19, and the outer surface right side of the rack two 20 and the outer surface left side of the seat base 21 constitute an integrated structure, and the seat base 21 and the lower surface of the support frame 22 are embeddedly mounted, and the support frame 22, the sitting plate 23 and the angle piece 24 constitute an integrated structure.

[0057] The sitting plate 23 and the sponge pad 25 constitute a pasting structure, and the sitting plate 23 and the back plate 28 constitute a positioning rotating structure through the angle piece 24, and the sponge pad 25 is located on the outer surface of the back plate 28, and the sitting plate 23 and the back plate 28 constitute a linkage rotating adjusting structure through the adjusting rod 26 and the connecting rod 27.

[0058] When the table assembled by the support base 1 needs to control the distance between the table and the chair, the motor installed on the upper side can be started to control the output shaft to drive the spur gear two 19 to rotate inside, which can engage the horizontal linear sliding of the seat base 21 installed by the rack two 20, and through the limiting sliding between the rack two 20 and the support base 1, prevent the seat base 21 from tilting when moving, and cooperate with the support frame 22 installed by the seat base 21, the seat plate 23 and the sponge pad 25 installed by the support frame 22 can support the user's buttocks, and when the backrest 28 is not used, the sponge pad 25 pasted on the upper and lower surfaces of the backrest 28 can be used to support the user's buttocks, and when the backrest 28 is used, the built-in motor of the support frame 22 will be started to control the adjusting rod 26 to rotate clockwise, and the connecting rod 27 will be rotated synchronously to adjust the rotation of the backrest 28, and the backrest 28 will be positioned under the shaft nesting of the angle piece 24 assembled by the seat plate 23 to form positioning use, so that when the connecting rod 27 controls the backrest 28 to form a certain angle, the connecting rod 27 will be horizontal with the adjusting rod 26 and the angle piece 24, then cooperate with the continuous rotation of the adjusting rod 26 to control the continuous positioning rotation of the backrest 28 and the seat plate 23, until the user's angle is stopped and supported, to prevent falling and excessive angle movement.

[0059] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0060] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A reversible desk and its combination with a desk chair, which is provided with a support seat (1) facilitating stable placement, and the inner surface of the support seat (1) is telescopically connected with a support rod (2), and the inner surface of the support rod (2) is pivotally connected with a fixed seat (3); characterized in that It comprises: a desk side plate (4) installed at the upper surface end of the fixed seat (3), and the inner surface of the left side of the support rod (2) is slidingly connected with a moving block (5), and the outer surface of the moving block (5) is pivotally connected with a push rod (6), while the inner surface of the upper side of the push rod (6) is pivotally connected to the lower surface of the desk side plate (4); an auxiliary assembly (7) pivotally connected to the outer surface of the right side of the support rod (2), and the inner surface of the auxiliary assembly (7) is nestedly connected with a compression spring (8), and the inner surface of the auxiliary assembly (7) is telescopically connected with an auxiliary rod (9), while the inner surface of the desk side plate (4) is clampingly installed with a clamping strip (10); a nested strip (11) installed on the inner surface of the clamping strip (10), and the inner surface of the nested strip (11) is nestedly connected to the outer surface side of the desk side plate (4), and the inner surface of the right side of the desk side plate (4) is pivotally connected with a positioning shaft (12), while the outer surface of the other side of the positioning shaft (12) is pivotally connected with a desk main plate (13); the inner surface of the desk main plate (13) is nestedly connected with a rack one (14), and the inner surface of the desk main plate (13) is slidingly connected with a moving seat (15), and the inner surface of the moving seat (15) is pivotally connected with a straight tooth gear one (16), and the straight tooth gear one (16) is meshingly connected to the lower side of the rack one (14), while the outer surface side of the moving seat (15) is pivotally connected with a connecting rod (17), and the other side of the connecting rod (17) is pivotally connected to the inner surface of the desk side plate (4), and the lower surface of the left side of the desk side plate (4) is nestedly connected with a support block (18), while the upper surface of the support block (18) is abuttingly connected with the desk main plate (13); the rack one (14) and the desk main plate (13) constitute an integrated structure, the desk main plate (13) and the moving seat (15) constitute a sliding structure, the moving seat (15) and the straight tooth gear one (16) constitute a rotating structure, the straight tooth gear one (16) and the rack one (14) are arranged in meshing, the moving seat (15) and the desk side plate (4) constitute a moving and extruding flip arrangement through the connecting rod (17), and the desk side plate (4) and the desk main plate (13) constitute a limiting support arrangement through the support block (18).

2. The reversible desk according to claim 1, wherein: the desk side plate (4) and the support rod (2) constitute a central positioning rotation through the fixed seat (3), the support rod (2) and the moving block (5) constitute a limiting movement structure through a threaded rod, the moving block (5) and the desk side plate (4) constitute a linkage rotating structure through the push rod (6), and the push rod (6) is symmetrically arranged about the middle segment of the outer surface of the support seat (1).

3. The reversible desk as claimed in claim 1, wherein: The auxiliary assembly (7) and the support rod (2) constitute a rotating structure, and the auxiliary assembly (7) and the auxiliary rod (9) constitute an elastic telescopic structure through the extrusion spring (8), and the support rod (2) and the table side plate (4) constitute an elastic support arrangement on the right side of the outer surface through the auxiliary assembly (7) and the auxiliary rod (9).

4. The reversible desk according to claim 1, wherein: The nested strip (11) is limitedly clamped with the table side plate (4) and the table main plate (13) through the clamping strip (10), and the table main plate (13) and the table side plate (4) constitute a positioning and rotating arrangement through the positioning shaft (12), and the nested strip (11) and the clamping strip (10) constitute an integrated structure.

5. The reversible desk as claimed in claim 1, wherein, Comprise: The inner surface of the support seat (1) is rotatably connected with a spur gear (19), and the outer surface side of the spur gear (19) is rotatably connected with a rack (20), and the outer surface of the rack (20) is rotatably connected with a seat base (21), and the rack (20) is rotatably connected with the inner surface of the support seat (1); The upper surface of the seat base (21) is rotatably connected with a support frame (22), and the upper surface of the support frame (22) is rotatably connected with a seat plate (23), and the outer surface of the seat plate (23) is rotatably connected with an angle piece (24), and the upper surface of the seat plate (23) is rotatably connected with a sponge pad (25); The outer surface of the seat plate (23) is rotatably connected with an adjusting rod (26), and the outer surface of the adjusting rod (26) is rotatably connected with a connecting rod (27), and the other end of the connecting rod (27) is rotatably connected with a backrest (28), and the outer surface of the backrest (28) is rotatably connected with the inner surface of the angle piece (24), and the outer surface of the backrest (28) is rotatably connected with the sponge pad (25).

6. A reversible desk according to claim 5, in combination with a chair, wherein: The rack (20) is rotatably connected with the support seat (1) through the spur gear (19), and the outer surface of the rack (20) is rotatably connected with the outer surface of the seat base (21), and the seat base (21) and the support frame (22) are rotatably connected with the lower surface of the support frame (22), and the support frame (22) and the seat plate (23) and the angle piece (24) constitute an integrated structure.

7. The reversible desk according to claim 5, wherein: The seat plate (23) and the sponge pad (25) constitute a pasting structure, and the seat plate (23) is rotatably connected with the backrest (28) through the angle piece (24), and the sponge pad (25) is rotatably connected with the outer surface of the backrest (28), and the seat plate (23) is rotatably connected with the backrest (28) through the adjusting rod (26) and the connecting rod (27).

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