Folding table board with multi-degree-of-freedom adjustment function

Abstract

The utility model discloses a folding table board with multiple degree of freedom adjusting function is used to install on the seat armrest, the folding table board of the utility model has multiple degrees of freedom, can rotate and unfold to the front and rear and left and right orientation relative to the user, can flexibly adjust the position of table board according to the actual demand of user, provides diversified demand, in addition, still can be fixed through the setting of limiting knob, can effectively fix the position of table board, prevents accidental shaking in the use process, ensures the stability and security of use. Meanwhile, the connecting piece below the table board is fixedly connected with the seat armrest, makes the whole table board structure stable, can bear greater weight, satisfies the demand of user to place various articles, as a whole, the folding table board of the utility model not only function diversified, and the structure is stable, uses safe and reliable, provides great convenience for the user.

Description

Technical Field

[0001] This utility model relates to the field of seat accessories technology, and in particular to a folding table that is installed on the armrest of a seat and has a multi-degree-of-freedom adjustment function. Background Technology

[0002] Currently, with the ever-accelerating pace of life and work, people often need to perform office work or complete other tasks in a sudden manner. However, sometimes they may not be able to do so at a table due to various reasons such as the lack of a table or the table being cluttered with miscellaneous items. As a result, foldable tabletops installed on chairs have emerged. Under normal circumstances, foldable tabletops are in a folded storage state. When in use, they can be unfolded with a simple operation to serve as a temporary tabletop, making it convenient for users to handle various purposes such as office work, writing, and dining.

[0003] In the prior art, utility model patent number CN206436877U discloses a multifunctional foldable dining table, including a tabletop, a fixed base, a rotating rod, and a central positioning rod. The tabletop is fixed to a chair via the fixed base. The rotating rod and the central positioning rod can fold and open the tabletop. A limiting slot can limit the rotation and form a support point for the tabletop to support the weight of items placed by the user. Although this dining table provides a temporary and convenient tabletop, once opened, it only has a fixed angle and position for use. It cannot adjust the position of the tabletop to accommodate the user's size or other needs, such as moving it closer to or further away from the user. Therefore, a more reasonable folding tabletop is urgently needed to solve the aforementioned technical problems. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned technologies, such as the fixed unfolding angle of the folding table and the inability to make multi-directional rotation adjustments, this utility model provides a folding table with multi-degree-of-freedom adjustment function.

[0005] To achieve the above objectives, this utility model provides a folding table with multi-degree-of-freedom adjustment function for installation on a seat armrest. It includes a first table, a connecting member, a first rotating member, and a second rotating member. Both ends of the first rotating member are rotatably connected to the bottom of the first table and one end of the second rotating member, respectively. The other end of the second rotating member is rotatably connected to one end of the connecting member, and the other end of the connecting member is fixedly connected to the seat armrest. A limiting knob is provided at the end of the first rotating member away from the first table, for restricting the rotation of the first and second rotating members. The first table can rotate relative to the user in the forward / backward and left / right directions via the first and second rotating members.

[0006] As an improvement of this utility model, the cylindrical surface of the first rotating member is provided with a first rotating circular groove, and the bottom surface of the first rotating circular groove is formed with a first through hole. The end of the second rotating member near the first rotating member is formed with a rotating column, and the second rotating member extends into the first rotating circular groove. The rotating column is fitted with the first through hole. The end face of the rotating column is provided with a first threaded hole, and an external bolt is threadedly connected to the first threaded hole to restrict the axial movement of the second rotating member.

[0007] As an improvement of this utility model, the inner wall surface of the first rotating groove is formed with a limiting crescent post, and the two sides of the limiting crescent post are respectively the first limit position and the second limit position. The second rotating member is provided with a crescent-shaped notch that matches the limiting crescent post at one end near the first rotating member. When the first rotating member rotates relative to the second rotating member, the two sides of the crescent-shaped notch abut against the first limit position or the second limit position of the limiting crescent post.

[0008] As an improvement of this utility model, the second rotating member has an assembly gap at one end near the connecting member, and the second rotating member is also provided with a first assembly hole communicating with the assembly gap. The connecting member is provided with a second assembly hole, one end of the connecting member is placed in the assembly gap, and a rivet is inserted into the first assembly hole and the second assembly hole to make the second rotating member and the connecting member rotatably connected.

[0009] As an improvement of this utility model, a connecting post is formed at the bottom of the first rotating member, and a limiting knob is provided on the outer sleeve of the connecting post. The outer cylindrical surface of the connecting post is provided with a threaded structure, and the inner wall surface of the limiting knob is provided with two opposing second rotating posts. The two second rotating posts clamp the connecting post and rotate along the threaded structure. The inner end face of the limiting knob is also provided with a limiting post, the end face of the connecting post is provided with a second through hole, and the cylindrical surface of the second rotating member is provided with a limiting hole. The limiting post passes through the second through hole and engages with the limiting hole. By rotating the limiting knob, the limiting post is moved away from or closer to the limiting hole.

[0010] As an improvement of this utility model, the connector can be fixedly connected to the seat armrest by means of sleeve or threaded connection.

[0011] As an improvement of this utility model, the side wall of the first tabletop is provided with a first storage groove, the first storage groove is provided with a second tabletop, the first storage groove is provided with a first fixing block, the second tabletop is provided with a first sliding groove that fits into the first fixing block, and the second tabletop slides in the first storage groove through the first sliding groove and the first fixing block; the second tabletop is provided with a third storage groove and a support plate, the two opposite walls of the third storage groove are provided with rotating grooves, the two sides of the support plate are provided with third rotating columns that fit into the rotating grooves, and the bottom surface of the third storage groove is also provided with a limiting block.

[0012] As an improvement of this utility model, the first storage slot is provided with wave-shaped limiting grooves on two opposite walls, and the second table is provided with limiting protrusions on both sides that are adapted to the wave-shaped limiting grooves.

[0013] As an improvement of this utility model, the side wall of the first table is provided with a second storage groove, the second storage groove is provided with a sliding plate, the bottom surface of the second storage groove is provided with a second fixing block, the sliding plate is provided with a second sliding groove, the sliding plate is engaged with the second fixing block through the second sliding groove to achieve sliding in the second storage groove, and the sliding plate is provided with a cup holding part for holding cups.

[0014] As an improvement of this utility model, the first tabletop has a second rotating groove on the side opposite to the seat armrest, a rotating cylinder is provided in the second rotating groove, a third through hole is provided on the inner end face of the rotating cylinder, a rotating cavity is provided at the end of the first connector near the first tabletop, a fourth rotating column is provided in the rotating cavity, and a second threaded hole is provided on the end face of the fourth rotating column. The first tabletop and the first connector are embedded into the second rotating groove through the fourth rotating column to achieve rotation, and an external bolt is threaded through the third through hole and threadedly connected to the second threaded hole to fix the first tabletop and the fourth rotating column.

[0015] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model provides a folding table with multi-degree-of-freedom adjustment function, which is used to install on the armrest of a seat. It includes a first table, a connecting member, a first rotating member, and a second rotating member. The two ends of the first rotating member are respectively rotatably connected to the bottom of the first table and one end of the second rotating member. The other end of the second rotating member is flipped and connected to one end of the connecting member. The other end of the connecting member is fixedly connected to the armrest of the seat. A limiting knob is provided at the end of the first rotating member away from the first table. The first table can rotate relative to the user in the front-back and left-right directions through the first and second rotating members. The folding table of this utility model has multiple degrees of freedom and can be rotated and unfolded relative to the user in the front-back and left-right directions. According to the user's actual needs, the position of the table can be flexibly adjusted, providing diverse needs. In addition, the setting of the limiting knob can effectively fix the position of the table, prevent accidental shaking during use, and ensure the stability and safety of use. Meanwhile, the connecting parts under the tabletop are fixedly connected to the armrests of the seats, making the entire tabletop structure stable and able to withstand a large weight, meeting the user's needs for placing various items. Overall, the folding tabletop of this utility model is not only multifunctional but also structurally stable and safe to use, providing great convenience to users. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present utility model;

[0017] Figure 2 This is an exploded view of the present invention;

[0018] Figure 3 This is the first exploded view of the first table panel of this utility model.

[0019] Figure 4 The second exploded view of the first table panel of this utility model

[0020] Figure 5 This is a schematic diagram of the first rotating component of this utility model;

[0021] Figure 6 This is an exploded view of the first rotating component of this utility model;

[0022] Figure 7 This is a first perspective view of the second rotating component of this utility model;

[0023] Figure 8 This is a second perspective view of the second rotating component of this utility model;

[0024] Figure 9 This is a schematic diagram of the first table and the first rotating component of this utility model.

[0025] The symbols for the main components are explained below:

[0026] 1. First tabletop; 2. Connector; 21. Second assembly hole; 3. First rotating component; 31. First rotating groove; 32. First through hole; 33. Limiting crescent-shaped post; 34. Connecting post; 35. Threaded structure; 36. Second through hole; 4. Second rotating component; 41. First rotating post; 42. First threaded hole; 43. Crescent-shaped notch; 44. First assembly hole; 45. Limiting hole; 5. Seat armrest; 6. Second rotating groove; 61. Rotating cylinder; 62. Third through hole; 63. Limiting protrusion; 7. Limiting knob; 71. Second rotating column; 72. Limiting column; 8. First storage slot; 81. First fixing block; 82. Wave-shaped limiting groove; 9. Second tabletop; 91. First sliding groove; 92. Third storage slot; 921. Rotating groove; 922. Limiting block; 93. Support plate; 931. Third rotating column; 94. Limiting protrusion; 10. Second storage slot; 101. Second fixing block; 11. Sliding plate; 111. Second sliding groove; 112. Cup-holding part; 12. Fourth rotating column; 121. Second threaded hole; 13. Limiting protrusion. Detailed Implementation

[0027] To more clearly illustrate this utility model, the following description, in conjunction with the accompanying drawings, will provide a further picture.

[0028] In the following description, specific examples are given to provide a more in-depth understanding of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of them. It should be understood that the specific embodiments described are only used to explain the present invention and are not intended to limit the present invention.

[0029] It should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the said feature, integral, step, operation, element, or component, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, or combinations thereof.

[0030] Please see Figures 1-9This utility model discloses a folding table with multi-degree-of-freedom adjustment function, used for installation on a seat armrest 5. It includes a first table 1, a connecting member 2, a first rotating member 3, and a second rotating member 4. Both ends of the first rotating member 3 are rotatably connected to the bottom of the first table 1 and one end of the second rotating member 4, respectively. The other end of the second rotating member 4 is flipped and connected to one end of the connecting member 2. The other end of the connecting member 2 is fixedly connected to the seat armrest 5. A limiting knob 7 is provided at the end of the first rotating member 3 away from the first table 1 to restrict the rotation of the first rotating member 3 and the second rotating member 4. The first table 1 can be adjusted by the first rotating member 3 and the second rotating member 4. The rotating component 4 rotates relative to the user in the forward and backward, left and right directions. Through the first rotating component 3 and the second rotating component 4, the first tabletop 1 can rotate relative to the user with multiple degrees of freedom. To better illustrate the rotation directions of the first rotating component 3, the second rotating component 4, and the first tabletop 1, this invention uses the user as a reference point. The left-right straight line direction relative to the user is defined as the X-axis, the up-down straight line direction as the Y-axis, and the forward-backward straight line direction as the Z-axis. When the first tabletop 1 uses the first rotating component 3 as the first rotation fulcrum, the first tabletop 1 can rotate in the plane formed by the first rotation fulcrum as the origin and the Y and Z axes. The first tabletop 1 can rotate horizontally in a combination of forward, backward, up, and down directions when the first rotating component 3 uses the second rotating component 4 as the second rotation fulcrum. When the first rotating component 3 uses the second rotating component 4 as the second rotation fulcrum, the first tabletop 1 can rotate horizontally in a combination of forward, backward, left, and right directions in the plane formed by the origin of the second rotation fulcrum and the XY axis. When the second rotating component 4 uses the connecting component 2 as the third rotation fulcrum, the first tabletop 1 can rotate horizontally in the forward, backward, left, and right directions in the plane formed by the XZ axis. When the first tabletop 1 is in its stowed state, it is in a vertical position. Therefore, the first tabletop 1 is rotated first using the first rotating component 3 as the fulcrum, and then rotated using the second rotating component 4 as the third rotation fulcrum. Rotating component 4 acts as a fulcrum to rotate the first rotating component 3, causing the first tabletop 1 to fully unfold and lie flat in front of the user. At this time, the second rotating fulcrum can be locked by the limiting knob 7, preventing the first rotating component 3 from rotating. By rotating the second rotating component 4, the first tabletop 1 can be lowered vertically. The folding tabletop of this utility model has multiple degrees of freedom of rotation, allowing users to flexibly adjust the position of the folding tabletop according to actual conditions and their own body size. When combined with a lifting armrest, and with the limiting knob 7, the horizontal position of the first tabletop 1 can be fixed, further improving the practicality of the folding tabletop and the user experience.

[0031] In this embodiment, the cylindrical surface of the first rotating member 3 is provided with a first rotating circular groove 31, and the bottom surface of the first rotating circular groove 31 is formed with a first through hole 32. The second rotating member 4 has a first rotating post 41 formed at one end near the first rotating member 3. The second rotating member 4 extends into the first rotating circular groove 31, and the first rotating post 41 engages with the first through hole 32. The end face of the first rotating post 41 is provided with a first threaded hole 42, and an external bolt is threadedly connected to the first threaded hole 42 to restrict the axial movement of the second rotating member 4. The first rotating member 3 and the second rotating member 4 can rotate relative to each other, and the axial orientation movement of the second rotating member 4 is limited by the external bolt, so that there is only a rotational relationship between the first rotating member 3 and the second rotating member 4. Further, the first rotating circular groove 31... The inner wall of the groove 31 forms a limiting crescent post 33, with the first limit position and the second limit position on both sides of the limiting crescent post 33. The second rotating member 4 has a crescent-shaped notch 43 that matches the limiting crescent post 33 at one end near the first rotating member 3. When the first rotating member 3 rotates relative to the second rotating member 4, the two sides of the crescent-shaped notch 43 abut against the first limit position or the second limit position of the limiting crescent post 33. The first limit position and the second limit position on both sides of the limiting crescent post 33 are equivalent to limiting and fixing the rotation of the second rotating member 4. It can also be understood that the maximum angle of relative rotation between the first rotating member 3 and the second rotating member 4 is the angle between the first limit position and the second limit position.

[0032] In this embodiment, the second rotating member 4 has an assembly gap at one end near the connecting member 2, and the second rotating member 4 is also provided with a first assembly hole 44 communicating with the assembly gap. The connecting member 2 is provided with a second assembly hole 21. One end of the connecting member 2 is placed in the assembly gap, and a rivet is inserted into the first assembly hole 44 and the second assembly hole 21 to make the second rotating member 4 and the connecting member 2 rotatably connected. The second rotating member 4 and the connecting member 2 are connected by a rivet embedded in the first rotatable hole and the second assembly hole 21, so that the second rotating member 4 and the connecting member 2 can rotate relative to each other.

[0033] In this embodiment, a connecting post 34 is formed at the bottom of the first rotating member 3, and a limiting knob 7 is sleeved on the connecting post 34. The outer cylindrical surface of the connecting post 34 is provided with a threaded structure 35, and the inner wall surface of the limiting knob 7 is provided with two opposing second rotating posts 71. The two second rotating posts 71 clamp the connecting post 34 and rotate along the threaded structure 35. The inner end face of the limiting knob 7 is also provided with a limiting post 72. The end face of the connecting post 34 is provided with a second through hole 36, and the cylindrical surface of the second rotating member 4 is provided with a limiting hole 45. The limiting post 72 passes through the second through hole 36 and is fitted into the limiting hole 45. By rotating the limiting knob 7, the two second rotating posts 71 clamping the connecting post 34 move along the trajectory of the threaded structure 35, causing the limiting knob 7 to move along the axial direction of the connecting post 34, so that the limiting post 72 moves away from or closer to the limiting hole 45. When the limiting knob 7 rotates, the limiting post 72 is embedded in the limiting hole 45 to fix the relative rotation between the first rotating member 3 and the second rotating member 4.

[0034] In this embodiment, the connector 2 can be fixedly connected to the seat armrest 5 by means of a socket or a threaded connection. The folding table is installed on the seat armrest 5 by means of a socket, which greatly enhances the installation stability of the folding table. The folding table is installed on the seat armrest 5 by means of a threaded connection, which makes the folding table easy to disassemble.

[0035] In this embodiment, a first storage groove 8 is provided on the side of the first tabletop 1, and a second tabletop 9 is provided in the first storage groove 8. A first fixing block 81 is provided on the first storage groove 8, and the second tabletop 9 is provided with a first sliding groove 91 that fits into the first fixing block 81. The second tabletop 9 slides in the first storage groove 8 through the first sliding groove 91 and the first fixing block 81. The second tabletop 9 is provided with a third storage groove 92 and a support plate 93. Rotating grooves 921 are provided on the two opposite walls of the third storage groove 92. Third rotating columns 931 that fit into the rotating grooves 921 are provided on both sides of the support plate 93. A limiting block 922 is also provided on the bottom surface of the third storage groove 92. The second tabletop 9 mainly achieves this by interlocking with the first fixing block 81 through the first sliding groove 91. The laptop slides back and forth in the first storage slot 8, extending or retracting into it. Meanwhile, a support plate 93 is installed on the second tabletop 9. The third rotating posts 931 at both ends of the support plate 93 engage with the rotating grooves 921 on the wall of the third storage slot 92, allowing the support plate 93 to flip and unfold, providing support for the user's laptop, books, and other items. The third storage slot 92 also has a limit stop 922 to limit the flipping angle of the support plate 93. When the laptop is placed on the second tabletop 9, the support plate 93 simultaneously abuts against the laptop and the limit stop 922, indirectly supporting the laptop through the limit stop 922. The support plate 93 prevents the laptop from sliding and falling.

[0036] In this embodiment, the first storage slot 8 has wave-shaped limiting grooves 82 on two opposite walls, and the second table 9 has limiting protrusions 94 on both sides that are adapted to the wave-shaped limiting grooves 82. Through the cooperation of the wave-shaped limiting grooves 82 and the limiting protrusions 94, a protrusion is provided between each limiting groove of the wave-shaped limiting groove 82. The protrusion is used to limit the sliding of the limiting protrusions 94, thereby controlling the extension length of the second table 9. According to the customer's needs, the most comfortable extension length can be selected by the customer.

[0037] In this embodiment, a second storage groove 10 is provided on the side wall of the first tabletop 1. A sliding plate 11 is provided in the second storage groove 10. A second fixing block 101 is provided on the bottom surface of the second storage groove 10. A second sliding groove 111 is provided on the sliding plate 11. The sliding plate 11 is engaged with the second fixing block 101 through the second sliding groove 111 to achieve sliding in the second storage groove 10. A cup holding part 112 for holding cups is provided on the sliding plate 11. The sliding plate 11 is also engaged with the second fixing block 101 through the second sliding groove 111 to achieve sliding extension and retraction in the second storage groove 10. The cup holding part 112 provided on the sliding plate 11 is mainly used to hold cylindrical items such as water cups of users, which improves the user experience to a certain extent.

[0038] In this embodiment, the first tabletop 1 has a second rotating groove 6 on the side opposite to the armrest 5. A rotating cylinder 61 is provided in the second rotating groove 6, and a third through hole 62 is provided on the inner end face of the rotating cylinder 61. A rotating cavity is provided at the end of the first connector 2 near the first tabletop 1. A fourth rotating column 12 is provided in the rotating cavity, and a second threaded hole 121 is provided on the end face of the fourth rotating column 12. The first tabletop 1 and the first connector 2 are embedded into the second rotating groove 6 through the fourth rotating column 12 to achieve rotation. An external bolt passes through the third through hole 62 and is threadedly connected to the second threaded hole 121 to fix the first tabletop 1 and the fourth rotating column 12. Furthermore, a limiting protrusion 63 is also provided in the rotating cavity, and a limiting strip 13 corresponding to the limiting protrusion 63 is provided in the second rotating groove 6. Through the cooperation of the limiting strip 13 and the limiting protrusion 63, the rotation angle of the first tabletop 1 can be limited to prevent the user from excessively rotating the first tabletop 1.

[0039] The working principle of this utility model is as follows:

[0040] When the folding table is stowed to the side of the armrest, the first table 1 is in a vertically placed stowed state. At this time, the first table 1 can be rotated and unfolded firstly, so that the first table 1 is away from the user in the front-back straight direction. Then, the first rotating component 3 is used to further unfold the first table 1 in the left-right direction relative to the user, so that the first table 1 is placed flat in front of the user. After the first table 1 is fully unfolded, the orientation of the first table 1 can be changed by rotating the first table 1 or rotating the first rotating component 3. The rotation of the first rotating component 3 can be controlled by the limiting knob 7 set on the first rotating component 3. Limit locking; when a user places a laptop on the first tabletop 1, the second tabletop 9 can be slid out from the side of the first tabletop 1 and the support plate 93 on the second tabletop 9 can be opened. The limit block 922 set on the second tabletop 9 abuts against the support plate 93 to support the laptop. A sliding plate 11 that can also be extended and slid is also set on the side of the first tabletop 1. When the sliding plate 11 is opened, the user can place cylindrical items such as water cups on the cup-holding part 112 on the sliding plate 11. The cup-holding part 112 can hold water cups and other items.

[0041] The advantages of this utility model are:

[0042] The folding table of this invention has multiple degrees of freedom, allowing it to rotate and unfold relative to the user in all directions (front, back, left, and right). The position of the table can be flexibly adjusted according to the user's actual needs, providing a variety of options.

[0043] The above-disclosed embodiments are only a few specific examples of this utility model. However, this utility model is not limited thereto. Any variations that can be conceived by those skilled in the art should fall within the protection scope of this utility model.

Claims

1. A folding table board having a multi-degree of freedom adjustment function for installation on a seat armrest, characterized by, The device includes a first tabletop, a connector, a first rotating component, and a second rotating component. The two ends of the first rotating component are rotatably connected to the bottom of the first tabletop and one end of the second rotating component, respectively. The other end of the second rotating component is rotatably connected to one end of the connector, and the other end of the connector is fixedly connected to the armrest of the seat. A limiting knob is provided at the end of the first rotating component away from the first tabletop to restrict the rotation of both the first and second rotating components. The first tabletop can rotate relative to the user in the forward / backward and left / right directions via the first and second rotating components.

2. The folding table board with multi-degree of freedom adjustment function according to claim 1, characterized in that, The cylindrical surface of the first rotating member is provided with a first rotating groove, and the bottom surface of the first rotating groove is formed with a first through hole. The end of the second rotating member near the first rotating member is provided with a first rotating column, which extends into the first rotating groove and is engaged with the first through hole. The end face of the first rotating column is provided with a first threaded hole, and an external bolt is threadedly connected to the first threaded hole to restrict the axial movement of the second rotating member.

3. The folding table board with multi-degree of freedom adjustment function according to claim 2, characterized in that, The inner wall of the first rotating groove forms a limiting crescent post, and the end of the second rotating member near the first rotating member is provided with a crescent-shaped notch that matches the limiting crescent post. When the first rotating member rotates relative to the second rotating member, the two sides of the crescent-shaped notch abut against the two sides of the limiting crescent post respectively.

4. The folding table board with multi-degree of freedom adjustment function according to claim 1, characterized in that, The second rotating member has an assembly gap at one end near the connecting member, and the second rotating member is also provided with a first assembly hole communicating with the assembly gap. The connecting member is provided with a second assembly hole. One end of the connecting member is placed in the assembly gap, and a rivet is inserted into the first assembly hole and the second assembly hole to make the second rotating member and the connecting member rotatably connected.

5. The folding table board with multi-degree of freedom adjustment function according to claim 1, characterized in that, The bottom of the first rotating component has a connecting post, and a limiting knob is fitted over the connecting post. The outer cylindrical surface of the connecting post has a threaded structure, and the inner wall of the limiting knob has two opposing second rotating posts. The two second rotating posts clamp the connecting post and rotate along the threaded structure. The inner end face of the limiting knob also has a limiting post, and the end face of the connecting post has a second through hole. The cylindrical surface of the second rotating component has a limiting hole, and the limiting post passes through the second through hole and engages with the limiting hole. By rotating the limiting knob, the limiting post can be moved away from or closer to the limiting hole.

6. The folding table board with multi-degree of freedom adjustment function according to claim 1, characterized in that, The connector can be fixedly connected to the seat armrest by means of a sleeve or a threaded connection.

7. The folding table board with multi-degree of freedom adjustment function according to claim 1, characterized in that, The first tabletop has a first storage slot, and a second tabletop is provided in the first storage slot. A first fixing block is provided on the first storage slot. The second tabletop has a first sliding groove that fits into the first fixing block. The second tabletop slides in the first storage slot through the first sliding groove and the first fixing block. The second tabletop has a third storage slot and a support plate. The two opposite walls of the third storage slot have rotating grooves. The two sides of the support plate have third rotating columns that fit into the rotating grooves. The bottom surface of the third storage slot also has a limiting block.

8. The folding table board with multi-degree of freedom adjustment function according to claim 1, characterized in that, The first storage slot has wave-shaped limiting grooves on two opposite walls, and the second table has limiting protrusions on both sides that are adapted to the wave-shaped limiting grooves.

9. The folding table board with multi-degree of freedom adjustment function according to claim 1, characterized in that, The first tabletop has a second storage slot on its side wall, a sliding plate in the second storage slot, a second fixing block on the bottom surface of the second storage slot, a second sliding groove on the sliding plate, and the sliding plate is fitted with the second fixing block through the second sliding groove to slide in the second storage slot. The sliding plate has a cup holding part for holding cups.

10. The folding table board with multi-degree of freedom adjustment function according to claim 1, characterized in that, The first tabletop has a second rotating groove on the side opposite to the armrest of the seat. A rotating cylinder is provided in the second rotating groove. A third through hole is provided on the inner end face of the rotating cylinder. A rotating cavity is provided at the end of the connector 2 near the first tabletop. A fourth rotating column is provided in the rotating cavity. A second threaded hole is provided on the end face of the fourth rotating column. The first tabletop and the connector 2 are embedded into the rotating cylinder through the fourth rotating column to achieve rotation. An external bolt passes through the third through hole and is threadedly connected to the second threaded hole to fix the first tabletop and the fourth rotating column.

Images