Desktop hinging structure and folding desk

Abstract

The invention provides a desktop hinge structure and a folding desk, the desktop hinge structure comprises a hinge disc, the side wall of the hinge disc is fixedly provided with a hinge plate, and the side wall of the hinge disc is provided with a limiting groove; the hinging disc is hinged to the hinging piece through the first hinging shaft; a cross rod of the L-shaped swing plate is hinged to the hinge piece through a second hinge shaft, a magnet corresponding to the limiting groove is fixedly arranged on the hinge piece, a vertical rod of the L-shaped swing plate is located between the magnet and the limiting groove, a limiting boss corresponding to the limiting groove is fixedly arranged on the vertical rod, and the upper end face of the limiting boss is an inclined face. The limiting hinge structure has the beneficial effects that compared with a traditional plug-in type limiting hinge structure, when the hinge disc needs to be rotated, the hinge disc only needs to be rotated clockwise by a small angle, then anticlockwise large-angle rotation of the hinge disc can be completed, the limiting boss automatically resets to achieve the limiting effect when the hinge disc is unfolded, and operation is more convenient and faster.

Description

Technical Field

[0001] This invention belongs to the field of educational equipment technology, and in particular relates to a desktop hinge structure and a folding desk. Background Technology

[0002] School desks are essential items for students during class. To facilitate student rest, some desks are designed with foldable desktops. During lunch breaks, students in the front row can rotate the desktop to gain more space to lie down. Current desktop hinge structures mostly use plug-in limit pins to limit the hinge plate in the hinge structure. The operation process is complicated and inconvenient to use. Moreover, after a period of use, the desktop will tilt and become unusable, limiting its lifespan. Repair requires disassembling the desktop adjustment base, which is also complicated. Summary of the Invention

[0003] In view of this, the present invention aims to provide a desktop hinge structure and a folding desk, in order to solve at least one of the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows: The first aspect of the present invention provides a desktop hinge structure, comprising: A hinge plate is fixedly provided on the side wall of the hinge plate, and a limit groove is opened on the side wall of the hinge plate; A hinge shaft, wherein the hinge disk is hinged to the hinge member via a first hinge shaft; The L-shaped swing plate has a horizontal bar that is hinged to a hinge member via a second hinge shaft. A magnet corresponding to a limiting groove is fixed on the hinge member. The vertical bar of the L-shaped swing plate is located between the magnet and the limiting groove. A limiting boss corresponding to the limiting groove is fixed on the vertical bar. The upper end face of the limiting boss is an inclined surface.

[0005] Furthermore, the lower end face of the limiting groove is a plane, the upper end face of the limiting groove is an inclined surface, and the lower end face of the first limiting boss is a plane. The L-shaped swing plate has a second hinge hole at the connection between the horizontal and vertical bars. The second hinge shaft passes through the second hinge hole and the third hinge hole of the hinge member. The L-shaped swing plate is hinged to the hinge member through the second hinge shaft. The hinge plate has a first hinge hole, and the hinge member has a fourth hinge hole corresponding to the first hinge hole. The first hinge shaft passes through the first hinge hole and the fourth hinge hole.

[0006] Furthermore, a mounting plate is fixedly provided on the lower end face of the crossbar away from the vertical bar, and a counterweight is provided on the mounting plate; The upper end of the counterweight is hinged to the mounting plate via a third hinge shaft.

[0007] Furthermore, when the end of the hinge disk away from the magnet rotates downward, the edge of the lower end of the hinge disk away from the magnet drives the L-shaped swing plate to rotate along the second hinge axis.

[0008] A second aspect of the present invention provides a folding desk, comprising: Desktop, wherein the desktop is fixedly connected to the hinge plate of the desktop hinge structure; The base is connected to the hinge structure of the desktop; The desktop hinge structure is the desktop hinge structure described in the first aspect.

[0009] Furthermore, the base includes two T-shaped frames, the vertical portion of which is arranged upwards, and the adjustment tube is movably connected to the inner side of the vertical portion along the height direction; The first hinge shaft is hinged to the adjusting tube. The lower end of the hinge has a rotating hole. The adjusting column is rotatably connected to the inner side of the rotating hole. The adjusting column is arranged parallel to the first hinge shaft. The horizontal adjusting bolt passes through the side wall of the adjusting pipe and is threaded to the adjusting column. The horizontal adjusting bolt is set perpendicular to the adjusting pipe. The regulating tube has a strip-shaped hole along its length, the regulating bolt passes through the strip-shaped hole, and an annular groove is formed at the end of the regulating bolt away from the bolt head. A first limiting ring is provided in the annular groove. The outer diameter of the first limiting ring is larger than the width of the strip hole; The heads of the first limiting ring and the horizontal adjusting bolt are respectively attached to the two end faces of the adjusting tube; The horizontal adjusting bolt has a limit thread hole, and the axis of the limit thread hole is set perpendicular to the axis of the horizontal adjusting bolt. The limit bolt passes through the adjusting pipe thread and is connected to the inside of the limit thread hole.

[0010] Furthermore, an adjusting block is fixedly provided on the inner side of the lower end of the adjusting tube, and a height adjusting bolt passes through the horizontal part of the T-shaped frame and is threadedly connected to the adjusting block; The lower end of the height adjusting bolt has an annular limiting groove, and a second limiting ring is provided inside the annular limiting groove. The second limiting ring and the head of the height adjusting bolt are respectively attached to the two end faces of the horizontal part of the T-shaped frame.

[0011] Furthermore, it also includes: A hinge rod is provided, which is parallel to the desktop. One end of the hinge rod is hinged to the hinge plate via a hinge post. A drive rod is fixed to the end of the hinge rod near the hinge post, which is perpendicular to the hinge rod. The lower end of the drive rod is hinged to one end of a limiting rod, which is horizontally positioned. A limiting plate corresponding to the limiting rod is fixed to the hinge member. A limiting hole corresponding to the limiting rod is opened on the limiting plate, and the limiting rod is located inside the limiting hole.

[0012] Furthermore, a guide plate corresponding to the limiting rod is fixed on the hinge plate, and a strip-shaped guide hole corresponding to the limiting rod is opened on the guide plate. The limiting rod passes through the strip-shaped guide hole and is located inside the limiting hole. The hinge post is a polygonal prism, the hinge rod has a polygonal hole that matches the polygonal prism, the hinge plate has a circular hole that corresponds to the polygonal prism, and the polygonal prism is rotatably connected to the inside of the circular hole through the polygonal hole. The number of desktop hinge structures is two, and each desktop hinge structure has a corresponding hinge rod. A polygonal prism passes through the polygonal hole of the two hinge rods. A compression spring is provided between the end of the hinge rod away from the hinge post and the tabletop.

[0013] Furthermore, there are two regulating tubes, with one regulating tube on the inner side of each vertical section; The outer sides of both ends of the horizontal part of the T-shaped frame are provided with anti-slip rubber sleeves; The vertical parts of the two T-shaped frames are fixedly connected by a first cross brace; The two regulating tubes are fixedly connected by a second cross brace; The upper end of the regulating tube is bent to one side, and a table drawer is fixed at the lower end of the tabletop. The opening direction of the table drawer is the same as the bending direction of the upper end of the regulating tube. A strip-shaped protrusion is fixedly provided on the bottom plate of the drawer near the opening of the drawer, and a reinforcing rib is fixedly provided on the outer wall of the drawer; A U-shaped protrusion is fixed to the upper end of the tabletop away from the opening of the drawer and on the side. A U-shaped frame is fixedly provided on the lower end surface of the desktop, and the vertical part of the U-shaped frame is fixedly connected to the hinge plate.

[0014] Compared with the prior art, the desktop hinge structure and folding desk described in this invention have the following advantages: (1) The desktop hinge structure described in this invention, compared with the traditional plug-in type limiting hinge structure, only requires rotating the hinge plate clockwise by a small angle first when the hinge plate needs to be rotated, and then the hinge plate can be rotated counterclockwise by a large angle. When unfolded, the limiting boss automatically resets to achieve the limiting function, making the operation more convenient.

[0015] (2) The folding desk of the present invention can be folded by first lifting the end of the desk away from the hinge structure and then pressing down on the desk. This is more convenient than the traditional folding process of the plug-in limit pin structure. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a cross-sectional view of the desktop hinge structure described in an embodiment of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the hinged disk according to an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the hinge member according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the L-shaped swing plate according to an embodiment of the present invention; Figure 5 This is a perspective structural diagram of the desktop hinge structure described in an embodiment of the present invention under different states; Figure 6 This is a schematic diagram of the three-dimensional structure of the folding desk according to an embodiment of the present invention; Figure 7 This is a schematic cross-sectional view of the folding desk described in an embodiment of the present invention; Figure 8 As described in the embodiments of the present invention Figure 7 Schematic diagram of the structure at point A in the middle; Figure 9 As described in the embodiments of the present invention Figure 7 Schematic diagram of the structure at point B; Figure 10 As described in the embodiments of the present invention Figure 7 Schematic diagram of the structure at point C.

[0017] Explanation of reference numerals in the attached figures: 1. Desktop; 2. T-shaped frame; 3. Table drawer; 4. Adjusting tube; 5. Hinge rod; 6. Hinge plate; 7. Hinge component; 8. L-shaped swing plate; 9. First hinge shaft; 10. Horizontal adjustment bolt; 11. Height adjustment bolt; 101. U-shaped boss; 201. Anti-slip rubber sleeve; 202. First cross brace; 401. Second cross brace; 402. Strip hole; 403. Adjusting block; 501. Compression spring; 502. Drive rod; 503. Limiting rod; 504. Hinge column; 601. First hinge hole; 602. Circular... Hole; 603, guide plate; 604, strip guide hole; 605, limiting groove; 606, hinge plate; 701, magnet; 702, fourth hinge hole; 703, rotating hole; 704, limiting hole; 705, limiting plate; 706, third hinge hole; 801, counterweight; 802, second hinge shaft; 803, limiting boss; 804, horizontal bar; 805, vertical bar; 806, mounting plate; 1001, first limiting ring; 1002, adjusting column; 1003, limiting bolt; 1101, second limiting ring. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] like Figures 1 to 5As shown, a desktop hinge structure includes: a hinge plate 6, a hinge plate 606 fixed on the side wall of the hinge plate 6, and a limiting groove 605 opened on the side wall of the hinge plate 6; a hinge shaft, the hinge plate 6 is hinged to the hinge member 7 through a first hinge shaft 9; an L-shaped swing plate 8, the horizontal bar 804 of the L-shaped swing plate 8 is hinged to the hinge member 7 through a second hinge shaft 802, a magnet 701 corresponding to the limiting groove 605 is fixed on the hinge member 7, the vertical bar 805 of the L-shaped swing plate 8 is located between the magnet 701 and the limiting groove 605, and a limiting boss 803 corresponding to the limiting groove 605 is fixed on the vertical bar 805, the upper end surface of the limiting boss 803 is an inclined surface. The lower end face of the limiting groove 605 is flat, and the upper end face of the limiting groove 605 is inclined. The lower end face of the first limiting boss 803 is flat. A second hinge hole is opened at the connection between the horizontal bar 804 and the vertical bar 805 of the L-shaped swing plate 8. The second hinge shaft 802 passes through the second hinge hole and the third hinge hole 706 of the hinge member 7. The L-shaped swing plate 8 is hinged to the hinge member 7 through the second hinge shaft 802. A first hinge hole 601 is opened on the hinge plate 6, and a fourth hinge hole 702 corresponding to the first hinge hole 601 is opened on the hinge member 7. The first hinge shaft 9 passes through the first hinge hole 601 and the fourth hinge hole 702.

[0023] In some embodiments, the weight of the crossbar 804 on the side away from the second hinge axis 802 of the vertical bar 805 is greater than the weight on the side of the vertical bar 805. In other embodiments, a mounting plate 806 is fixedly mounted on the lower end face of the crossbar 804 away from the vertical bar 805, and a counterweight 801 is provided on the mounting plate 806; the upper end of the counterweight 801 is hinged to the mounting plate 806 through a third hinge shaft. The weight of the crossbar 804 on the side of the counterweight 801 is greater than the weight on the side of the vertical bar 805.

[0024] When the end of the hinge plate 6 away from the magnet 701 rotates downward, the edge of the lower end of the hinge plate 6 away from the magnet 701 drives the L-shaped swing plate 8 to rotate along the second hinge axis 802.

[0025] Work process: like Figure 5 As shown, the desktop hinge structure operates as follows: State a ( Figure 5 (Figure a) The limiting boss 803 is located inside the limiting groove 605. The lower end plane of the first limiting boss is limited by the lower end plane of the first limiting groove 605. At this time, the end of the hinge plate 606 away from the hinge plate 6 cannot rotate downward. At this time, the weight of the horizontal bar 804 on the side of the counterweight block 801 is greater than the weight on the side of the vertical bar 805, so that the limiting boss 803 can always be inserted into the inner side of the limiting groove 605. State b ( Figure 5(See Figure b) When the hinge plate 6 is rotated clockwise, under the guidance of the inclined surface at the upper end of the limiting groove 605 and the inclined surface of the limiting boss 803, the limiting boss 803 moves towards the magnet 701. The magnet 701 attracts the vertical rod 805 of the L-shaped swing plate 8. At this time, the limiting boss 803 disengages from the limiting groove 605, and the limiting plate can rotate counterclockwise. State c ( Figure 5 (See Figure c) Rotating the hinge plate 6 counterclockwise causes the lower edge of the hinge plate 6 away from the magnet 701 to drive the L-shaped swing plate 8 to rotate along the second hinge axis 802. As the L-shaped swing plate 8 rotates counterclockwise, the vertical rod 805 disengages from the magnet 701, and the weight of the horizontal rod 804 on the side of the counterweight 801 is greater than the weight on the side of the vertical rod 805. As the L-shaped swing plate 8 rotates counterclockwise, the limiting boss 803 inserts into and fits the side wall of the hinge plate 6. Rotating the hinge plate 6 clockwise causes the weight of the horizontal rod 804 on the side of the counterweight 801 to be greater than the weight on the side of the vertical rod 805. When the limiting boss 803 aligns with the limiting groove, the limiting boss 803 inserts into the limiting groove 605 and returns to state a. When the desktop 112 needs to be folded, first lift the end of the desktop 112 away from the hinge structure, and then press down on the desktop 112 to complete the folding process. This is more convenient than the traditional plug-and-play folding mechanism.

[0026] Compared to the traditional plug-in type limiting hinge structure, when the hinge plate 6 needs to be rotated, it is only necessary to first rotate the hinge plate 6 clockwise by a small angle, and then the hinge plate 6 can be rotated counterclockwise by a large angle. The unfolded first limiting boss 803 automatically resets to achieve the limiting function, making the operation more convenient.

[0027] like Figures 6 to 10 As shown, a folding desk includes: a desktop 1, which is fixedly connected to a hinge plate 606 of a desktop hinge structure; a base, which is connected to a hinge member 7 of the desktop hinge structure; the desktop hinge structure is the desktop hinge structure described above.

[0028] The base includes two T-shaped frames 2, with the vertical portion of the T-shaped frame 2 facing upwards. The adjusting tube 4 is movably connected to the inner side of the vertical portion along the height direction. The first hinge shaft 9 is hinged to the adjusting tube 4. The lower end of the hinge 7 has a rotating hole 703. The adjusting column 1002 is rotatably connected to the inner side of the rotating hole 703. The adjusting column 1002 is parallel to the first hinge shaft 9. The horizontal adjusting bolt 10 passes through the side wall of the adjusting tube 4 and is threadedly connected to the adjusting column 1002. The horizontal adjusting bolt 10 is perpendicular to the adjusting tube 4. The adjusting pipe 4 has a strip-shaped hole 402 along its length. An adjusting bolt passes through the strip-shaped hole 402. An annular groove is formed at the end of the adjusting bolt away from the bolt head, and a first limiting ring 1001 is provided within the annular groove. The outer diameter of the first limiting ring 1001 is larger than the width of the strip-shaped hole 402. The heads of the first limiting ring 1001 and the horizontal adjusting bolt 10 are respectively fitted to the two end faces of the adjusting pipe 4. A limiting threaded hole is formed on the horizontal adjusting bolt 10, and the axis of the limiting threaded hole is perpendicular to the axis of the horizontal adjusting bolt 10. A limiting bolt 1003 passes through the adjusting pipe 4 and is threaded into the inner side of the limiting threaded hole. The limiting bolt 1003 limits the horizontal adjusting bolt 10, preventing it from rotating when adjustment is not needed, thus improving stability during use. The horizontal adjusting bolt 10 is rotatably connected to the adjusting tube 4 and cannot move axially. By rotating the horizontal adjusting bolt 10, the adjusting column 1002 can be moved (during this process, the adjusting column 1002 rotates in the mounting hole), which in turn drives the hinge 7 to rotate along the first hinge axis 9. The levelness of the tabletop 1 can be adjusted by rotating the horizontal adjusting bolt 10. The operation is convenient, reduces maintenance costs, and extends the service life of the table.

[0029] An adjusting block 403 is fixedly installed on the inner side of the lower end of the adjusting tube 4. The height adjusting bolt 11 passes through the horizontal part of the T-shaped frame 2 and is threadedly connected to the adjusting block 403. The lower end of the height adjusting bolt 11 has an annular limiting groove 605, and a second limiting ring 1101 is provided inside the annular limiting groove 605. The heads of the second limiting ring 1101 and the height adjusting bolt 11 are respectively attached to the two end faces of the horizontal part of the T-shaped frame 2. The height adjusting bolt 11 is rotatably connected to the horizontal part of the T-shaped frame 2. Its height will not change during the rotation of the height adjusting bolt 11. The adjusting block 403 is threadedly connected to the height adjusting bolt 11. By rotating the height adjusting bolt 11, the height of the tube 4 and the desktop 1 can be adjusted, which is suitable for students of different heights and expands the scope of use.

[0030] A hinge rod 5 is arranged parallel to the desktop 1. One end of the hinge rod 5 is hinged to the hinge plate 6 via a hinge post 504. A drive rod 502 is fixedly provided at the end of the hinge rod 5 near the hinge post 504, which is perpendicular to the hinge rod 5. The lower end of the drive rod 502 is hinged to one end of a limiting rod 503. The limiting rod 503 is arranged horizontally. A limiting plate 705 corresponding to the limiting rod 503 is fixedly provided on the hinge member 7. A limiting hole 704 corresponding to the limiting rod 503 is opened on the limiting plate 705. The limiting rod 503 is located inside the limiting hole 704. When in use, press the end of the hinge rod 5 away from the hinge structure upwards. The hinge rod 5 drives the drive rod 502 to rotate. The drive rod 502 drives the limiting rod 503 to move along the strip guide hole 604. The limiting rod 503 disengages from the limiting hole 704 and releases the limiting of the hinge plate 606. After the hinge rod 5 is released, under the elastic force of the compression spring 501, the hinge rod 5 returns to its original position, and the limiting rod 503 is inserted into the limiting hole 704.

[0031] A guide plate 603 corresponding to the limiting rod 503 is fixed on the hinge plate 6. The guide plate 603 has a strip-shaped guide hole 604 corresponding to the limiting rod 503. The limiting rod 503 passes through the strip-shaped guide hole 604 and is located inside the limiting hole 704. The hinge post 504 is a polygonal prism. The hinge rod 5 has a polygonal hole matching the polygonal prism. The hinge plate 6 has a circular hole 602 corresponding to the polygonal prism. The polygonal prism passes through the polygonal hole and is rotatably connected to the inside of the circular hole 602. There are two desktop hinge structures, each with a corresponding hinge rod 5. The polygonal prism passes through the polygonal holes of both hinge rods 5. A compression spring 501 is provided between the end of the hinge rod 5 away from the hinge post 504 and the desktop 1. The compression spring 501 serves to reset the hinge rod 5. The polygonal prism allows the two hinge rods 5 to rotate synchronously, thereby simultaneously releasing the limiting effect on the hinge plate 606.

[0032] There are two regulating tubes 4, with one regulating tube 4 on the inner side of each vertical part; The outer sides of both ends of the horizontal part of the T-shaped frame 2 are provided with anti-slip rubber sleeves 201; the anti-slip rubber sleeves 201 not only play an anti-slip role, but also prevent the ground from being scratched.

[0033] The vertical parts of the two T-shaped frames 2 are fixedly connected by a first cross brace 202; the first cross brace 202 improves the structural strength between the two T-shaped frames 2.

[0034] The two regulating pipes 4 are fixedly connected by a second cross brace 401; the second cross brace 401 improves the structural strength between the two regulating pipes 4.

[0035] The upper end of the adjusting tube 4 is bent to one side, and a table drawer 3 is fixed at the lower end of the tabletop 1. The opening direction of the table drawer 3 is the same as the bending direction of the upper end of the adjusting tube 4. The bending of the adjusting tube 4 makes the center of the table correspond to the vertical part of the T-shaped frame 2, which improves the stability of the table.

[0036] A strip-shaped protrusion is fixed to the bottom plate of the table drawer 3 near the opening of the table drawer 3. The strip-shaped protrusion serves to prevent items inside the table drawer 3 from rolling out. Reinforcing ribs are fixed to the outer wall of the table drawer 3. The reinforcing ribs serve to strengthen the structural strength of the table drawer 3.

[0037] A U-shaped protrusion 101 is fixed on the upper surface of the tabletop 1, away from the opening of the drawer 3, and on the side. The U-shaped protrusion serves to prevent items from rolling off the tabletop 11.

[0038] A U-shaped frame is fixedly provided on the lower end surface of the desktop 1. The vertical rod 805 of the U-shaped frame is fixedly connected to the hinge plate 606. The U-shaped frame improves the overall structural strength of the desktop 1.

[0039] When you need to fold the desktop 1, first press the end of the hinge rod 5 away from the hinge structure upwards, and the limiting rod 503 will disengage from the limiting hole 704. Then lift the end of the desktop 1 away from the hinge structure upwards, and then press the desktop 1 downwards to complete the folding of the desktop 1. The folding process is more convenient than the traditional structure of inserting and removing the limiting pin.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A desktop hinge structure, characterized in that: include: A hinge plate (6) is fixed on the side wall of the hinge plate (6), and a limit groove (605) is opened on the side wall of the hinge plate (6). The hinge shaft (9) is used to hinge the hinge disc (6) to the hinge member (7). The L-shaped swing plate (8) has a horizontal bar (804) that is hinged to a hinge member (7) via a second hinge shaft (802). A magnet (701) corresponding to a limiting groove (605) is fixed on the hinge member (7). The vertical bar (805) of the L-shaped swing plate (8) is located between the magnet (701) and the limiting groove (605). A limiting boss (803) corresponding to the limiting groove (605) is fixed on the vertical bar (805). The upper end face of the limiting boss (803) is an inclined surface.

2. The desktop hinge structure according to claim 1, characterized in that: The lower end face of the limiting groove (605) is a plane, the upper end face of the limiting groove (605) is an inclined surface, and the lower end face of the first limiting boss (803) is a plane. The L-shaped swing plate (8) has a second hinge hole at the connection between the horizontal bar (804) and the vertical bar (805). The second hinge shaft (802) passes through the second hinge hole and the third hinge hole (706) of the hinge member (7). The L-shaped swing plate (8) is hinged to the hinge member (7) through the second hinge shaft (802). The hinge plate (6) has a first hinge hole (601), and the hinge member (7) has a fourth hinge hole (702) corresponding to the first hinge hole (601). The first hinge shaft (9) passes through the first hinge hole (601) and the fourth hinge hole (702).

3. The desktop hinge structure according to claim 1, characterized in that: A mounting plate (806) is fixedly provided on the lower end face of the horizontal bar (804) away from the vertical bar (805), and a counterweight (801) is provided on the mounting plate (806); The upper end of the counterweight (801) is hinged to the mounting plate (806) via a third hinge shaft.

4. A desktop hinge structure according to claim 1, characterized in that: When the end of the hinge plate (6) away from the magnet (701) rotates downward, the edge of the lower end of the hinge plate (6) away from the magnet (701) drives the L-shaped swing plate (8) to rotate along the second hinge axis (802).

5. A folding desk, characterized in that: include: Desktop (1), wherein the desktop (1) is fixedly connected to the hinge plate (606) of the hinge structure of the desktop (1); The base is connected to the hinge (7) of the hinge structure of the base and the desktop (1); The hinge structure of the desktop (1) is the same as the hinge structure of the desktop (1) according to any one of claims 1-4.

6. A folding desk according to claim 5, characterized in that: The base includes two T-shaped frames (2), the vertical part of the T-shaped frame (2) is set upward, and the adjusting tube (4) is movably connected to the inner side of the vertical part along the height direction; The first hinge shaft (9) is hinged to the adjusting tube (4). The lower end of the hinge (7) has a rotating hole (703). The adjusting column (1002) is rotatably connected to the inner side of the rotating hole (703). The adjusting column (1002) is arranged parallel to the first hinge shaft (9). The horizontal adjusting bolt (10) passes through the side wall of the adjusting pipe (4) and is threadedly connected to the adjusting column (1002). The horizontal adjusting bolt (10) is set perpendicular to the adjusting pipe (4). The regulating tube (4) has a strip hole (402) arranged along the length of the regulating tube (4), the regulating bolt passes through the strip hole (402), and an annular groove is provided at the end of the regulating bolt away from the bolt head. A first limiting ring (1001) is provided in the annular groove. The outer diameter of the first limiting ring (1001) is larger than the width of the strip hole (402); The heads of the first limiting ring (1001) and the horizontal adjusting bolt (10) are respectively attached to the two end faces of the adjusting tube (4); The horizontal adjusting bolt (10) has a limiting thread hole, and the axis of the limiting thread hole is set perpendicular to the axis of the horizontal adjusting bolt (10). The limiting bolt (1003) passes through the adjusting tube (4) and is threaded to the inside of the limiting threaded hole.

7. A folding desk according to claim 6, characterized in that: An adjusting block (403) is fixedly installed on the inner side of the lower end of the adjusting tube (4), and a height adjusting bolt (11) passes through the horizontal part of the T-shaped frame (2) and is threadedly connected to the adjusting block (403); The lower end of the height adjusting bolt (11) has an annular limiting groove (605), and the inner side of the annular limiting groove (605) is provided with a second limiting ring (1101). The heads of the second limiting ring (1101) and the height adjusting bolt (11) are respectively attached to the two end faces of the horizontal part of the T-shaped frame (2).

8. A folding desk according to claim 5, characterized in that, Also includes: A hinge rod (5) is arranged parallel to the desktop (1). One end of the hinge rod (5) is hinged to the hinge plate (6) through a hinge post (504). A drive rod (502) is fixed at one end of the hinge rod (5) near the hinge post (504) and is arranged perpendicular to the hinge rod (5). The lower end of the drive rod (502) is hinged to one end of a limiting rod (503). The limiting rod (503) is arranged horizontally. A limiting plate (705) corresponding to the limiting rod (503) is fixed on the hinge member (7). A limiting hole (704) corresponding to the limiting rod (503) is opened on the limiting plate (705). The limiting rod (503) is located inside the limiting hole (704).

9. A folding desk according to claim 8, characterized in that: The hinge plate (6) is fixed with a guide plate (603) corresponding to the limiting rod (503). The guide plate (603) has a strip-shaped guide hole (604) corresponding to the limiting rod (503). The limiting rod (503) passes through the strip-shaped guide hole (604) and is located inside the limiting hole (704). The hinge post (504) is a polygonal prism, the hinge rod (5) has a polygonal hole that matches the polygonal prism, the hinge plate (6) has a circular hole (602) that corresponds to the polygonal prism, and the polygonal prism is rotatably connected to the inside of the circular hole (602) through the polygonal hole. The number of hinge structures of the desktop (1) is two, and each hinge structure of the desktop (1) is provided with a hinge rod (5), and the polygonal holes of the two hinge rods (5) are penetrated by the polygonal holes of the prisms. A compression spring (501) is provided between the end of the hinge rod (5) away from the hinge post (504) and the tabletop (1).

10. A folding desk according to claim 6, characterized in that: The number of the regulating tubes (4) is two, and each vertical part has an regulating tube (4) on its inner side; The T-shaped frame (2) has anti-slip rubber sleeves (201) on the outer sides of both ends of the horizontal part; The vertical parts of the two T-shaped frames (2) are fixedly connected by a first cross brace (202); The two regulating tubes (4) are fixedly connected by a second cross brace (401); The upper end of the regulating tube (4) is bent to one side, and the lower end of the tabletop (1) is fixed with a table drawer (3). The opening direction of the table drawer (3) is the same as the bending direction of the upper end of the regulating tube (4). The bottom plate of the drawer (3) is provided with a strip-shaped protrusion near the opening of the drawer (3), and a reinforcing rib is provided on the outer side wall of the drawer (3); A U-shaped protrusion (101) is fixedly provided on the upper end of the tabletop (1) away from the opening of the drawer (3) and on the side. A U-shaped frame is fixedly provided on the lower end surface of the desktop (1), and the vertical rod (805) of the U-shaped frame is fixedly connected to the hinge plate (606).

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