Seat with table board

Abstract

The utility model discloses a chair with a table board, which comprises a main body structure, an armrest structure, an armrest frame, a table board structure and a table board frame, the main body structure comprises a chair seat component, a chair back component and a base component, and the armrest frame is connected between the armrest structure and the chair seat component or between the armrest structure and the base component or between the armrest structure and the chair back component or between the armrest structure and the table board structure. The table plate frame comprises a lower supporting arm connected with the armrest frame or the main body structure through a connecting device, a connecting support connected with the table plate structure, and an upper supporting arm arranged between the connecting support and the lower supporting arm. And an activity space is formed between the upper side surface of the front part of the chair seat and the lower supporting arm, and legs of a passenger can move into the activity space along the periphery of the chair seat component when the table plate structure is in a use state or a storage state. According to the seat, the table plate structure can be quickly and flexibly switched between the use state and the storage state, the leg movement area around the seat component is expanded through the movement space, the seat can adapt to more sitting postures of a passenger, and the use comfort and experience feeling of the passenger are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of seat, especially a seat with a table board. BACKGROUND

[0002] At present, the seat such as e-sports chair, office chair has been widely used in people's life and work, along with people's life and work quality requirement unceasingly improving, the demand of seat function is also increasingly diversified, especially in some need using the desktop to write, office, dining or placing the article operation scene, the seat with table board is particularly important.

[0003] Prior art discloses a utility model (announcement number: CN2762655Y) with the computer chair structure improvement of collapsible table board, its table board and seat armrest are connected through two-stage single pivot structure, two-stage single pivot structure includes the armrest section fixedly connected through a plurality of screws and seat armrest outside, the trackball arranged in the armrest section end, the table board section fixedly connected with the table board side, the ball shell body arranged in the table board section end, the trackball is accommodated in the ball shell body and can tumble along the ball shell body, the passenger can make the ball shell body tumble relative to the trackball through the table board and make the table board switch between the use state of horizontal arrangement in the seat armrest front side and the storage state of vertical storage in the seat armrest outside by force.

[0004] The seat table board in the above technical scheme switches from the use state to the storage state, the passenger needs to first lift the end of seat table board away from two-stage single pivot structure 90 ° upwards, then again 90 ° backwards, the force direction is very not in line with the human structure, is inconvenient to force, and the experience is poor. SUMMARY

[0005] The utility model provides a seat with a table board in the prior art, solve the technical problem that the table board of existing seat is inconvenient to switch to the storage state.

[0006] The technical scheme adopted by the utility model is:

[0007] A seat with a table board, comprising a main body structure, at least one armrest structure and an armrest frame for supporting the armrest structure, a table board structure and a table board frame for supporting the table board structure, the main body structure comprising a seat member for a rider to sit on, a back member arranged at the back side of the seat member for the rider to lean against, and a base member for supporting the seat member away from a medium surface; the armrest frame is connected between the armrest structure and the seat member or the base member or the back member; the table board frame comprises a lower support arm connected with the armrest frame or the main body structure through a connecting device, a connecting bracket connected with the table board structure, and an upper support arm arranged between the connecting bracket and the lower support arm, the upper support arm comprising an upper arm body and a first connecting piece and a second connecting piece vertically rotatably connected at both ends of the upper arm body respectively, the connecting bracket is connected on the first connecting piece, and the second connecting piece is horizontally rotatably connected on the upper end of the lower support arm; the table board structure can be kept in a use state horizontally arranged above the armrest structure through the table board frame, or kept in a storage state vertically stored outside the armrest structure through the table board frame, and the table board structure can be switched between the use state and the storage state through the deformation of the table board frame when force is applied to the table board structure; the lower end of the lower support arm is arranged spaced apart from the front side of the seat member to form a seat front part arranged in front of the lower end of the lower support arm on the seat member, and a moving space for the legs of the rider to move into the seat member around the seat member when the table board structure is in the use state or the storage state is formed between the upper side of the seat front part and the lower support arm.

[0008] Preferably, an open space for the table board frame to rotate is formed around between the bottom of the armrest structure and the front side of the armrest frame, the lower end of the lower support arm is arranged in the open space and can be horizontally rotated around the first longitudinal axis relative to the connecting device, and the upper end is arranged in front of the armrest structure; when the table board structure is rotated around the first longitudinal axis to the side of the seat member by force, the upper support arm can drive the lower support arm to rotate outward around the first longitudinal axis relative to the connecting device to the outside of the armrest structure with the upper end of the lower support arm arranged.

[0009] Preferably, the lower support arm comprises a first arm arranged along a first longitudinal axis, a second arm arranged along a second longitudinal axis, and a diagonal arm connected between the upper end of the first arm and the lower end of the second arm, the second longitudinal axis is arranged parallel to the first longitudinal axis and on a different axis, the first arm is arranged in the open space and is horizontally pivotally connected to the connecting device along the first longitudinal axis or is horizontally pivotally connected to an intermediate piece positioned on the connecting device along the first longitudinal axis, the second connecting piece is horizontally pivotally connected to the upper end of the second arm along the second longitudinal axis and can rotate with the lower support arm relative to the connecting device around the first longitudinal axis between the front side and the outer side of the armrest structure, when the second connecting piece is arranged on the front side of the armrest structure, part or all of the diagonal arm is arranged above and spaced from the upper side of the front part of the seat to form a first active space for the legs of the occupant to extend into, when the second connecting piece is arranged on the outer side of the armrest structure, a second active space for the legs of the occupant to extend into can be formed between the front side of the lower support arm and the upper side of the front part of the seat.

[0010] Preferably, the connecting bracket comprises a connecting base, a support base pivotally connected to the connecting base along a third longitudinal axis, and a third connecting piece connected between the connecting base and the first connecting piece, the table plate structure is connected to the support base, and when the table plate structure is rotated around the third longitudinal axis, the support base can be driven to rotate around the third longitudinal axis relative to the connecting base to adjust the holding direction of the table plate structure.

[0011] Preferably, the third connecting piece comprises a first pivot end and a second pivot end connected to each other, the first pivot end is pivotally connected to the connecting base along a first transverse axis, and the second pivot end is connected to the first connecting piece, and when the table plate structure is rotated around the first transverse axis, the support base and the connecting base can be driven to rotate around the first transverse axis relative to the third connecting piece to adjust the holding angle of the table plate structure.

[0012] Preferably, the upper side of the armrest structure forms a support surface for supporting the table plate structure, and the table plate structure can be placed on the upper side of the support surface when in use.

[0013] Preferably, the armrest frame comprises a first bracket connected to the seat member or the base member or the backrest member, a second bracket connected to the lower end of the first bracket, and a third bracket connected to the second bracket in a liftable manner, the armrest structure is connected to the upper end of the third bracket and can be driven to rise or fall with the lifting movement of the third bracket, and when the table plate structure is in use, the table plate structure is forced to translate to rise or fall, which can drive the upper arm body of the upper support arm to vertically rotate relative to the first connecting piece and the second connecting piece to adjust the support surface on which the table plate structure is placed at different heights.

[0014] Preferably, the upper arm body comprises a first movable arm and a second movable arm arranged side by side at the lower side of the first movable arm, the first connecting member is hinged to the first movable arm and the second movable arm away from the lower support arm at one end respectively through a first hinge structure and a second hinge structure, the second connecting member is hinged to the first movable arm and the second movable arm close to the lower support arm at one end respectively through a third hinge structure and a fourth hinge structure, the first hinge structure, the second hinge structure, the third hinge structure and the fourth hinge structure form a parallelogram structure, when the table board structure is forced to translate and rise, the parallelogram structure can be deformed upward relative to the second connecting member through the first connecting member to raise the holding height of the table board structure; when the table board structure is forced to translate and fall, the parallelogram structure can be deformed downward relative to the second connecting member through the first connecting member to lower the holding height of the table board structure.

[0015] Preferably, the armrest structure and the armrest frame are correspondingly provided with two groups, are arranged at the two sides of the seat member respectively, the bottom of the table board structure has a middle area and side area arranged at the opposite sides of the middle area, the connecting support is connected with the middle area of the bottom of the table board structure, the two side areas of the bottom of the table board structure can be placed on the upper side of the supporting surface of the two armrest structures respectively when the table board structure is in a use state; and / or, the table board structure is arranged as a foldable structure.

[0016] Preferably, the connecting device is arranged at the side of the seat member and is detachably connected with the armrest frame or the main body structure, the connecting device comprises a mounting base and a mounting assembly, the mounting base comprises a mounting body and a mounting shaft connected with the mounting body, the mounting assembly is connected with the mounting body in a matched mode and can fasten and hold part of the structure of the armrest frame or the main body structure between the mounting body and the mounting assembly, the mounting shaft is arranged to extend upward along the vertical direction, and the lower end of the lower support arm is connected with the mounting shaft.

[0017] The utility model discloses reach the beneficial effects are:

[0018] The seat provided by the utility model, when the table plate structure needs to be stored, the occupant can push the table plate structure to move outward by rotating the arm to drive the second connecting piece of the upper supporting arm to rotate horizontally outward relative to the upper end of the lower supporting arm, and at the same time, the table plate structure is pushed to rotate downward by rotating the arm to drive the upper arm body of the upper supporting arm to swing vertically downward relative to the first connecting piece and the second connecting piece, so that the table plate structure is switched to a storage state of being vertically stored outside the armrest structure, and the table plate structure is kept in the storage state by the deformed table plate frame, the occupant can pull the table plate structure to rotate upward by rotating the arm to drive the upper arm body of the upper supporting arm to swing vertically upward relative to the first connecting piece and the second connecting piece, and at the same time, the table plate structure is pulled to move inward by rotating the arm to drive the second connecting piece of the upper supporting arm to rotate horizontally inward relative to the upper end of the lower supporting arm, so that the table plate structure is switched to a use state of being horizontally arranged above the armrest structure, and the table plate structure is kept in the use state by the deformed table plate frame, the force application direction is more in line with ergonomics, the table plate structure is conveniently and quickly switched between the use state and the storage state, and the experience is improved; and the lower end of the lower supporting arm is arranged in space with the front side of the seat member to form a seat front part arranged in front of the lower end of the lower supporting arm on the seat member, an activity space for the legs of the occupant to move into the seat member around the seat member when the table plate structure is in the use state or the storage state is formed between the upper side of the seat front part and the lower supporting arm, the activity space enlarges the leg activity area around the seat member, more sitting postures of the occupant can be adapted, the comfort of use of the occupant is further improved, and the experience is further improved.

[0019] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings described herein are used to provide further understanding of the utility model, constitute a part of the present application, the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute improper limitation to the utility model.In the drawings,

[0021] Figure 1 Structure diagram of seat of an embodiment of the utility model Figure One .

[0022] Figure 2 Structure diagram of seat of an embodiment of the utility model Figure Two .

[0023] Figure 3 Structure diagram of seat of an embodiment of the utility model Figure Three .

[0024] Figure 4Structure diagram of the seat of one embodiment of the present application Figure Four .

[0025] Figure 5 Structure diagram of the seat of one embodiment of the present application Figure Five .

[0026] Figure 6 Structure diagram of the seat of one embodiment of the present application Figure Six .

[0027] Figure 7 Structure diagram of the desk board structure, desk board frame and connecting device of one embodiment of the present application.

[0028] Figure 8 Exploded structure diagram of the desk board structure, desk board frame and connecting device of one embodiment of the present application.

[0029] Figure 9 Top view of the seat of one embodiment of the present application Figure One .

[0030] Figure 10 Top view of the seat of one embodiment of the present application Figure Two .

[0031] Figure 11 Top view of the seat of one embodiment of the present application Figure Three .

[0032] Figure 12 Structure diagram of the seat of another embodiment of the present application Figure One .

[0033] Figure 13 Structure diagram of the seat of another embodiment of the present application Figure Two . DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort fall within the scope of protection of the present application.

[0035] In the description of the utility model, need understanding is, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0036] In the utility model, unless another definite provision and limitation, the terms "installation", "connection", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the intercommunication of two elements inside.For the ordinary skilled person in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0037] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, also can include that the first and second features are not in direct contact, but are in contact through another feature between them.Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than the second feature.The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than the second feature.

[0038] Unless otherwise defined, the technical terms or scientific terms used herein should be understood as the usual meaning of the person skilled in the art to which the utility model belongs.The "first", "second" and similar words used in the utility model patent application specification and claims do not indicate any order, quantity or importance, but only distinguish different components.Similarly, "one" or "a" and similar words do not indicate quantity limitation, but indicate that there is at least one.

[0039] As Figures 1-11As shown, as an embodiment of the utility model provides a kind of seat with table board, including main body structure 1, armrest structure 2, the armrest frame 3 for supporting armrest structure 2, table board structure 4, and the table board frame 5 for supporting table board structure 4.It is provided that main body structure 1 includes the seat member 11 for being used for the passenger to ride, the chair back member 12 for being used for the passenger to lean in the rear side of seat member 11, and the base member 13 for supporting seat member 11 away from the surface of medium such as ground.The armrest frame 3 is connected between armrest structure 2 and seat member 11.The table board frame 5 includes the lower support arm 51 connected with armrest frame 3 by connecting device 100, the connecting bracket 53 connected with table board structure 4, and the upper support arm 52 arranged between connecting bracket 53 and lower support arm 51.The upper support arm 52 includes upper arm body and first connecting piece 521 and second connecting piece 522 vertically rotatingly connected at both ends of upper arm body respectively, connecting bracket 53 is connected on first connecting piece 521, second connecting piece 522 is horizontally rotatingly connected on the upper end of lower support arm 51, table board structure 4 can be kept in the use state of being horizontally arranged above armrest structure 2 by table board frame 5, or kept in the storage state of being vertically stored outside armrest structure 2 by table board frame 5, when force is applied to table board structure 4, it can be switched between use state and storage state by the deformation of table board frame 5.The lower end of lower support arm 51 is arranged with the front side of seat member 11 to form seat front part 111 arranged in front of the lower end of lower support arm 51 on seat member 11, and the upper side between seat front part 111 and lower support arm 51 forms the activity space for the legs of the passenger to move into it along seat member 11 when table board structure 4 is in use state or storage state.When the table board structure 4 needs to be stored, the occupant can push the table board structure 4 outward to drive the second connecting piece 522 of the upper supporting arm 52 to rotate outward horizontally relative to the upper end of the lower supporting arm 51, and push the table board structure 4 downward to drive the upper arm body of the upper supporting arm 52 to swing downward vertically relative to the first connecting piece 521 and the second connecting piece 522, so as to switch the table board structure 4 to a storage state of being vertically stored outside the armrest structure, and keep the table board structure 4 in the storage state through the deformed table board frame 5. The occupant can pull the table board structure 4 upward to drive the upper arm body of the upper supporting arm 52 to swing upward vertically relative to the first connecting piece 521 and the second connecting piece 522, and pull the table board structure 4 inward to drive the second connecting piece 522 of the upper supporting arm 52 to rotate inward horizontally relative to the upper end of the lower supporting arm 51, so as to switch the table board structure 4 to a use state of being horizontally arranged above the armrest structure 2, and keep the table board structure 4 in the use state through the deformed table board frame 5. The force direction is more ergonomic, and the table board structure 4 can be quickly and flexibly switched between the use state and the storage state, thereby improving the experience. The activity space expands the leg activity area around the seat member, can adapt to more sitting postures of the occupant, further improves the comfort of the occupant in use, and further improves the experience.

[0040] As shown in Figure 3 In some specific embodiments, an open space A for the rotation of the table board frame 5 is formed between the bottom of the armrest structure 2 and the front side of the armrest frame 3. The lower end of the lower supporting arm 51 is arranged in the open space A and can rotate horizontally relative to the connecting device 100 around the first longitudinal axis a1, and the upper end is arranged in front of the armrest structure 2. When the table board structure 4 is rotated relative to the seat member 11 around the first longitudinal axis a1, the lower supporting arm 51 can be driven by the upper supporting arm 52 to rotate outward horizontally relative to the connecting device 100 around the first longitudinal axis a1 to the outside of the armrest structure 2, so as to avoid the upper end of the lower supporting arm 51 and the upper supporting arm 52 from being interfered by the armrest structure 2 when the table board structure 4 is switched between the use state and the storage state, and make the structure arrangement between the table board frame 5, the armrest structure 2, the armrest frame 3 and the seat member 11 compact.

[0041] As shown in Figure 3 , 7In some embodiments, the lower support arm 51 comprises a first arm 511 arranged along a first longitudinal axis a1, a second arm 512 arranged along a second longitudinal axis a2, and a diagonal arm 513 connected between the upper end of the first arm 511 and the lower end of the second arm 512. The second longitudinal axis a2 is arranged parallel to the first longitudinal axis a1 and on a different axis. The first arm 511 is arranged in the open space A and is horizontally rotatably connected to the connecting device 100 along the first longitudinal axis a1. The second connecting piece 512 is horizontally rotatably connected to the upper end of the second arm 512 along the second longitudinal axis a2 and can rotate with the lower support arm 51 relative to the connecting device 100 around the first longitudinal axis a1 between the front side and the outer side of the handrail structure 2, so that the structure of the lower support arm 51 is more adapted to the structure of the handrail frame 3 and the handrail structure 2, and the structure is arranged more compactly. In this embodiment, the first support 31 is arranged spaced apart from the front side of the seat member 11, so that the first arm 511 connected to the first support 31 by the connecting device 100 is arranged spaced apart from the seat front 111. In order to ensure that the depth of the activity space can adapt to more postures of the occupant, the front-to-back width of the seat front 111 can be set to be greater than 10 cm. When the second connecting piece 512 is arranged on the front side of the handrail structure 2, part or all of the structure of the diagonal arm 513 is arranged above and spaced apart from the upper side of the seat front 111 to form a first activity space B for the occupant's legs to extend into when the table board structure 4 is in the use state. When the second connecting piece 512 is arranged on the outer side of the handrail structure 2, a second activity space C can be formed between the front side of the lower support arm 51 and the upper side of the seat front 111 for the occupant's legs to extend into when the table board structure 4 is in the storage state. Both the first activity space B and the second activity space C can expand the leg activity area around the seat member 11, adapt to more sitting postures of the occupant, and further improve the comfort and experience of the occupant.

[0042] As Figure 5 , Figure 7As shown, in some embodiments, the connecting bracket 53 comprises a connecting base 531, a supporting base 532 rotatably connected to the connecting base 531 along the third longitudinal axis a3, and a third connecting piece 533 connected between the connecting base 531 and the first connecting piece 521. The table board structure 4 is connected to the supporting base 532, and when the table board structure 4 is forced to rotate around the third longitudinal axis a3, the supporting base 532 can be driven to rotate around the third longitudinal axis a3 relative to the connecting base 531 to adjust the holding direction of the table board structure 4. For example, in the storage state, the table board structure 4 can be rotated around the third longitudinal axis a3 to be arranged along the height direction of the armrest structure 2, so as to reduce the space occupation of the table board structure 4 to the outside lateral space of the activity space, further expand the leg movement area around the seat member 11, and adapt to more sitting postures of the occupant. Also, the table board structure 4 can be rotated around the third longitudinal axis a3 to be arranged along the front-rear direction of the armrest structure 2, so as to reduce the space occupation of the table board structure 4 to the upper area outside the armrest structure 2, thereby expanding the hand movement area around the armrest structure 2, and adapting to more sitting postures of the occupant. In addition, the front-rear position of the table board structure 4 can be adjusted by the occupant forcing the table board structure 4 to translate forward and backward, so as to drive the supporting base 532 to rotate around the third longitudinal axis a3 relative to the connecting base 531, while the upper supporting arm 52 rotates around the second longitudinal axis a2 relative to the upper end of the lower supporting arm 51, and the lower supporting arm 51 rotates around the first longitudinal axis a1 relative to the connecting base 10. The table board structure 4 is kept in the use state at the position by the deformed table board frame 5, so that the front-rear position of the table board structure 4 can be flexibly adjusted to adapt to the differences in fatness, sitting posture and use habit of different occupants, further improving the comfort and experience of the occupant. Figure 12 , Figure 13 As shown, in some embodiments, the connecting bracket 53 comprises a connecting base 531, a supporting base 532 rotatably connected to the connecting base 531 along the third longitudinal axis a3, and a third connecting piece 533 connected between the connecting base 531 and the first connecting piece 521. The table board structure 4 is connected to the supporting base 532, and when the table board structure 4 is forced to rotate around the third longitudinal axis a3, the supporting base 532 can be driven to rotate around the third longitudinal axis a3 relative to the connecting base 531 to adjust the holding direction of the table board structure 4. For example, in the storage state, the table board structure 4 can be rotated around the third longitudinal axis a3 to be arranged along the height direction of the armrest structure 2, so as to reduce the space occupation of the table board structure 4 to the outside lateral space of the activity space, further expand the leg movement area around the seat member 11, and adapt to more sitting postures of the occupant. Also, the table board structure 4 can be rotated around the third longitudinal axis a3 to be arranged along the front-rear direction of the armrest structure 2, so as to reduce the space occupation of the table board structure 4 to the upper area outside the armrest structure 2, thereby expanding the hand movement area around the armrest structure 2, and adapting to more sitting postures of the occupant. In addition, the front-rear position of the table board structure 4 can be adjusted by the occupant forcing the table board structure 4 to translate forward and backward, so as to drive the supporting base 532 to rotate around the third longitudinal axis a3 relative to the connecting base 531, while the upper supporting arm 52 rotates around the second longitudinal axis a2 relative to the upper end of the lower supporting arm 51, and the lower supporting arm 51 rotates around the first longitudinal axis a1 relative to the connecting base 10. The table board structure 4 is kept in the use state at the position by the deformed table board frame 5, so that the front-rear position of the table board structure 4 can be flexibly adjusted to adapt to the differences in fatness, sitting posture and use habit of different occupants, further improving the comfort and experience of the occupant.

[0043] As shown, in some embodiments, the connecting bracket 53 comprises a connecting base 531, a supporting base 532 rotatably connected to the connecting base 531 along the third longitudinal axis a3, and a third connecting piece 533 connected between the connecting base 531 and the first connecting piece 521. The table board structure 4 is connected to the supporting base 532, and when the table board structure 4 is forced to rotate around the third longitudinal axis a3, the supporting base 532 can be driven to rotate around the third longitudinal axis a3 relative to the connecting base 531 to adjust the holding direction of the table board structure 4. For example, in the storage state, the table board structure 4 can be rotated around the third longitudinal axis a3 to be arranged along the height direction of the armrest structure 2, so as to reduce the space occupation of the table board structure 4 to the outside lateral space of the activity space, further expand the leg movement area around the seat member 11, and adapt to more sitting postures of the occupant. Also, the table board structure 4 can be rotated around the third longitudinal axis a3 to be arranged along the front-rear direction of the armrest structure 2, so as to reduce the space occupation of the table board structure 4 to the upper area outside the armrest structure 2, thereby expanding the hand movement area around the armrest structure 2, and adapting to more sitting postures of the occupant. In addition, the front-rear position of the table board structure 4 can be adjusted by the occupant forcing the table board structure 4 to translate forward and backward, so as to drive the supporting base 532 to rotate around the third longitudinal axis a3 relative to the connecting base 531, while the upper supporting arm 52 rotates around the second longitudinal axis a2 relative to the upper end of the lower supporting arm 51, and the lower supporting arm 51 rotates around the first longitudinal axis a1 relative to the connecting base 10. The table board structure 4 is kept in the use state at the position by the deformed table board frame 5, so that the front-rear position of the table board structure 4 can be flexibly adjusted to adapt to the differences in fatness, sitting posture and use habit of different occupants, further improving the comfort and experience of the occupant. Figure 8As shown, in some specific embodiments, the third connecting piece 533 comprises a first rotating end 5331 and a second rotating end 5332 connected with each other, the first rotating end 5331 is rotationally connected with the lower end of the connecting base 531 along the first horizontal axis b1, and the second rotating end 5332 is connected with the first connecting piece 52. When the force applying table structure 4 rotates around the first horizontal axis b1, the support base 532 and the connecting base 531 can be driven to rotate around the first horizontal axis b1 relative to the third connecting piece 533 to adjust the holding angle of the table structure 4. For example, in the use state, the table structure 4 can be rotated around the first horizontal axis b1 to adjust the pitch angle, adapt to more use postures of the occupant, and can be matched with each rotating connecting structure on the table plate frame 5 to facilitate the occupant to flexibly switch between different use states and storage states, and the use is more flexible and convenient.

[0044] As shown, Figure 4 In some specific embodiments, the handrail structure 2 is formed with a support surface 21 on the upper side for supporting the table structure. When the table structure 4 is in the use state, it can be placed on the upper side of the support surface 21. The support surface 21 of the handrail structure 2 and the support base 532 of the table plate frame 5 jointly support the table structure 4, greatly enhancing the load-bearing capacity of the table structure 4 and preventing it from shaking. The table structure 4 can stably support the occupant's arms and objects such as keyboards and books. The upper side of the table structure 4 and the top surface of the handrail structure 2 jointly support the occupant's arms, increasing the contact area between the table structure 4 or the handrail structure 2 and the occupant's arms, further improving the comfort of the occupant's use and enhancing the experience.

[0045] As shown, Figure 3As shown, in some embodiments, the armrest frame 3 comprises a first support 31 connected with the seat member 11, a second support 32 connected with the first support 31 at the lower end, and a third support 33 connected with the second support 32 in a liftable manner, and the armrest structure 2 is connected with the upper end of the third support 33 and can be driven to ascend or descend with the third support 33. When the table board structure 4 is in the use state, the table board structure 4 is driven to ascend or descend in translation, which can drive the upper arm body of the upper support arm 52 to rotate vertically relative to the first connecting piece 521 and the second connecting piece 522 to adjust the upper side of the support surface 21 on which the table board structure 4 is placed at different height positions, and keep the table board structure 4 at the height in the use state through the deformed table board frame 5, so that the height of the table board structure 4 can be flexibly adjusted to adapt to the height of the support surface 21 of the armrest structure 2. The table board structure 4 can be placed on the upper side of the support surface 21 at different heights, ensuring that the table board structure 4 can be stably supported by the support surface 21 of the armrest structure 2 and the support base 532 of the table board frame 5 at different heights, adapting to the differences in height, fatness, sitting posture and use habits of different passengers, improving the comfort of the passengers and the experience, and enabling the use state and the storage state at different heights to be switched and kept in each state through the deformation of the table board frame 5, which is very flexible and convenient to use. In other embodiments, the armrest frame 3 can also be connected between the armrest structure 2 and the base member 13 or the back member 12, and the first support 31 can be connected between the second support 32 and the base member 13 or the back member 12 at the lower end.

[0046] In some embodiments, the top surface of the armrest structure 2 is provided with an abutting surface 22 for abutting against the arm of the passenger, and the support surface 21 is arranged at the front side of the abutting surface 22 and is smoothly and smoothly connected with the abutting surface 22, which has good flatness. The abutting surface 22 and the support surface 21 can jointly contact the arm of the passenger when the table board structure 4 is in the storage state, without affecting the normal use of the armrest structure. In other embodiments, the support surface 21 can also be arranged to be higher or lower than the abutting surface 22, which can be used to contact and support the table board structure 4 in the use state.

[0047] As Figure 7As shown, in some embodiments, the upper arm body comprises a first movable arm 523 and a second movable arm 524 arranged side by side below the first movable arm 523, the first connecting member 521 is hingedly connected to the first movable arm 523 and the second movable arm 524 away from the lower support arm 51 respectively through the first hinge structure 501 and the second hinge structure 502, the second connecting member 522 is hingedly connected to the first movable arm 523 and the second movable arm 524 close to the lower support arm 51 respectively through the third hinge structure 503 and the fourth hinge structure 504, the first hinge structure 501, the second hinge structure 502, the third hinge structure 503 and the fourth hinge structure 504 form a parallelogram structure, when the force applying table structure 4 is translated upward, the parallelogram structure can be deformed upward relative to the second connecting member 522 through the first connecting member 521 to raise the holding height of the table structure 4; when the force applying table structure 4 is translated downward, the parallelogram structure can be deformed downward relative to the second connecting member 522 through the first connecting member 521 to lower the holding height of the table structure 4. In this embodiment, the second hinge structure 502 is arranged directly below the first hinge structure 501, and the fourth hinge structure 504 is arranged directly below the third hinge structure 503, so that the two sides of the parallelogram are arranged perpendicular to the ground or other installation medium surface, when the force applying table structure 4 is translated upward, the parallelogram structure can be vertically deformed upward relative to the second connecting member 522 through the first connecting member 521 to raise the holding height of the table structure 4; when the force applying table structure 4 is translated downward, the parallelogram structure can be vertically deformed downward relative to the second connecting member 522 through the first connecting member 521 to lower the holding height of the table structure 4, so as to ensure that the table structure 4 can be raised or lowered in a horizontal state. Of course, in other embodiments, the second hinge structure 502 can be arranged obliquely below the first hinge structure 501, and the fourth hinge structure 504 can be arranged obliquely below the third hinge structure 503, so that the table structure 4 can be raised or lowered in an oblique direction.

[0048] As Figure 2As shown, in some specific embodiments, the third support 33 is telescopically sleeved with the second support 32, the first support 31 is horizontally arranged, and one end of the first support 31 is fixedly connected with the lower end of the second support 32, and the other end is detachably connected with the seat member 11 through screws, bolts or other structures, and the third support 33 and the second support 32 are arranged apart from the side of the seat member 11 to form a space above the first support 31 for arranging the connecting device 100 and the lower support arm 51. Specifically, the third support 33 is provided in a sleeve structure, the second support 32 is provided in a plug rod structure, the second support 32 is telescopically sleeved into the third support 33, and the third support 33 can be lifted by telescopic movement relative to the second support 32. In this embodiment, the first support arm 511 is arranged directly above the first support 31 and between the seat member 11 and the second support 32, so that the lower support arm 51 and the space of the seat member 11 and the armrest 3 are arranged more compactly. In other embodiments, the first support arm 511 can also be arranged on the front side of the first support 31. As another embodiment of the present application, the third support 33 can also be provided in a plug rod structure and the second support 32 can be provided in a sleeve structure, and the first support 31 and the seat member 11 can also be welded, integrally formed or connected through horizontal adjustment structure.

[0049] As Figure 8As shown, in some embodiments, the first connecting member 521 comprises a first hinged end 5211 and a first connecting end 5212 connected with each other, the first hinged structure 501 is arranged on the first movable arm 523 between the first hinged end 5211 and an end away from the lower support arm 51 along the second transverse axis b2, the second hinged structure 502 is arranged on the second movable arm 524 between the first hinged end 5211 and an end away from the lower support arm 51 along the third transverse axis b3, the second rotating end 5332 is horizontally rotatably connected with the first connecting end 5212 along the fifth longitudinal axis a5, when the force applying table board structure 4 rotates around the fifth longitudinal axis a5, it can drive the connecting bracket 53 to rotate relative to the first connecting member 521 to adjust the support position of the table board frame 5 to the table board structure 4, further to adapt to the differences in height, fatness, sitting posture and use habits of the operator. The second connecting member 522 comprises a second hinged end 5221 and a second connecting end 5222 connected with each other, the third hinged structure 503 is arranged on the first movable arm 523 between the second hinged end 5221 and an end close to the lower support arm 51 along the fourth transverse axis b4, the fourth hinged structure 504 is arranged on the second movable arm 524 between the second connecting end 5222 and an end close to the lower support arm 51 along the fifth transverse axis b5, the second connecting end 5222 is horizontally rotatably connected with the upper end of the lower support arm 51 along the second longitudinal axis a2, when the force applying table board structure 4 translates upward or downward, it can drive the ends away from the lower support arm 52 of the first movable arm 523 and the second movable arm 524 to rotate around the second transverse axis b2 and the third transverse axis b3 respectively, and the ends close to the lower support arm 52 of the first movable arm 523 and the second movable arm 524 to rotate around the fourth transverse axis b4 and the fifth transverse axis b5 respectively to make the parallelogram structure deform upward or downward, so as to adjust the support height of the table board frame 5 to the table board structure 4.

[0050] In some embodiments, the first hinge structure 501 or the second hinge structure 502 or the third hinge structure 503 or the fourth hinge structure 504 can adopt a hinge structure of shaft and shaft channel interworking, a hinge structure of cylindrical protrusion and cylindrical groove interworking, or other hinge structures. The rotating connection structure between the lower end of the lower support arm 52 and the connecting device 100, or the rotating connection structure between the second connecting piece 522 and the upper end of the lower support arm 52, or the rotating connection structure between the third connecting piece 533 and the first connecting piece 521, or the rotating connection structure between the connecting base 531 and the third connecting piece 533, or the rotating connection structure between the support base 532 and the connecting base 531, or the rotating connection structure between the first hinge structure 501 and the first movable arm 523 and the first connecting piece 521, or the rotating connection structure between the second hinge structure 502 and the second movable arm 524 and the first connecting piece 521, or the rotating connection structure between the third hinge structure 503 and the first movable arm 523 and the second connecting piece 522, or the rotating connection structure between the fourth hinge structure 504 and the second movable arm 524 and the second connecting piece 522 has a pre-tightening structure such as a screw, a bolt, or a damping structure for preventing excessive rotation, or other retaining structures. Each component can be stably retained in the position after rotation through the pre-tightening structure or damping structure or other retaining structures, so that the table board frame 5 can be kept in various deformed states, thereby supporting the table board structure 4 to keep in various use states and storage states.

[0051] As Figures 9-11As shown, in some embodiments, the seat member 11 has a middle region and side regions arranged on both sides of the middle region, and the armrest structure 2 is horizontally rotatably connected to the upper end of the third support 33 along the fourth longitudinal axis a4 and can be horizontally rotated around the fourth longitudinal axis a4 between a first direction D arranged towards the front of the middle region of the seat member 11 and a second direction E arranged towards the outside of the seat member 11 to adjust the direction of the armrest structure 2. When the armrest structure 2 is in the first direction D, the table board structure 4 can be kept in a first use state horizontally placed on the upper side of the armrest structure 2 by the table board frame 5, at this time, the inwardly arranged abutting surface 22 and the upper side of the table board structure 4 together form a first arm placement region for the occupant to place the arms inwardly on the abutting surface 22 and the upper side of the table board structure 4; when the armrest structure 2 is in the second direction E, the table board structure 4 can be kept in a second use state horizontally placed on the upper side of the armrest structure 2 by the table board frame 5, at this time, the outwardly arranged abutting surface 22 and the upper side of the table board structure 4 together form a second arm placement region for the occupant to place the arms outwardly on the abutting surface 22 and the upper side of the table board structure 4; when the armrest structure 2 is between the first direction D and the second direction E, the table board structure 4 can be kept in a third use state horizontally placed on the upper side of the armrest structure 2 by the table board frame 5, at this time, the abutting surface 22 and the upper side of the table board structure 4 together form a third arm placement region for the occupant to place the arms on the abutting surface 22 and the upper side of the table board structure 4, so that the table board structure 4 can be adjusted according to the direction of the armrest structure 2, and the table board structure 4 can be placed on the upper side of the support surface 21 when the armrest structure 2 is at multiple different angles, and the abutting surface 22 and the table board structure 4 together realize the support of the arms of the occupant.

[0052] In some embodiments, the rear part of the table board structure 4 is formed with an abutting part 41 for abutting the occupant, and support parts 42 arranged on both sides of the abutting part 41, when the table board structure 4 is in the first use state, the rear side of the support part 42 is arranged close to the fourth longitudinal axis a4, and when the table board structure 4 is in the second use state, the rear side of the support part 42 is arranged close to the fourth longitudinal axis a4, so that the pressure of the support part 41 on the support surface 21 is arranged close to the connection position of the armrest structure 2 and the third support 33, according to the principle of leverage, so that the support of the support part 41 by the support surface 21 and the connection between the armrest structure 2 and the third support 33 are more stable. The abutting part 41 is arranged as an arc-shaped structure recessed towards the front of the seat member 11, so that a larger seating area is formed by the arc-shaped structure, the support part 42, and the armrest structure 3, and the comfort of the occupant is improved.

[0053] In some specific embodiments, two sets of armrest structures 2 are arranged on the two sides of the seat member 11 respectively. The bottom of the table plate structure 4 has a middle region and side regions arranged on the opposite sides of the middle region. The connecting support 53 is connected to the middle region of the bottom of the table plate structure 4, and the side regions of the bottom of the table plate structure 4 can be placed on the upper sides of the two armrest structures 2 respectively when the table plate structure 4 is in the use state, so that the table plate structure 4 is supported by the table plate support 5 and the two armrest structures 2, and the three supporting positions further enhance the load-bearing capacity of the table plate structure 4. Especially when the table plate structure 4 is translated forward and backward to be arranged in front of or behind the supporting surfaces 21 of the two armrest structures 2, the supporting base 532 and the supporting surfaces 21 of the two armrest structures 2 form a triangular supporting structure, and the table plate structure 4 is less likely to shake in the use state. In the embodiment, the table plate support 5 is connected to the left armrest support 3, and is suitable for being operated by the left hand to switch the table plate structure 4 between different use states and storage states when a user sits on the seat member 11. In other embodiments, the table plate support 5 can be connected to the right armrest support 3, and is suitable for being operated by the right hand to switch the table plate structure 4 between different use states and storage states when a user sits on the seat member 11, so as to adapt to different use habits or scenes.

[0054] As shown in Figure 3 In some specific embodiments, the connecting device 100 is arranged on the side of the seat member 11 and is detachably connected to the first support 31 of the armrest support 3, and can be selectively installed or detached according to the use needs. Of course, in other embodiments, the lower supporting arm 51 can also be connected to the main body structure 1 through the connecting device 100, and the connecting device 100 can be fixedly connected or arranged as an integral structure with the armrest support 3 or the main body structure 1 to make the connection more stable. In the embodiment, the connecting device 100 includes a mounting base 10 and a mounting assembly 20. The mounting base 10 includes a mounting body and a mounting shaft 104 connected to the mounting body. The mounting assembly 20 is connected to the mounting body in a matched mode and can fasten and clamp the first support 31 of the armrest support 3 between the mounting body and the mounting assembly 20. The mounting shaft 104 extends upward along the vertical direction, and the lower end of the lower supporting arm 51 is connected to the mounting shaft 104, which is conducive to increasing the height of the first activity space B and the second activity space C and further expanding the leg activity area around the seat member 11. In other embodiments, the connecting device 100 can be fastened and clamped between the mounting body and the mounting assembly 20 for detachable connection with the second support 32 or the third support 33 or other parts of the armrest support 3, or with other parts of the seat member 11, the seatback member or the base member of the main body structure 1.

[0055] As shown in Figure 7As shown, in some embodiments, the mounting body includes a first plate body 101, a second plate body 102 arranged opposite to the first plate body 101, and a third plate body 103 connected between the first plate body 101 and the second plate body 102. A mounting shaft 104 is connected outside the first plate body 101, and the mounting shaft 104 is used to be connected with the first branch 511 of the lower support arm 51. The first plate body 101, the second plate body 102, and the third plate body 103 surround a receiving groove, and an opening of the receiving groove on a side arranged opposite to the third plate body 103 and two sides arranged adjacent to the third plate body 103 are arranged in communication with each other. The mounting assembly 20 includes an adjusting shaft 201 and a pressing piece 202 connected to the adjusting shaft 201. The pressing piece 202 is arranged in the receiving groove and is arranged in a spaced manner with the first plate body 101 to form a clamping channel for clamping the first support 31. A positioning hole 1021 is provided through the second plate body 102. The adjusting shaft 201 is arranged in the positioning hole 1021 and is threadedly connected with the positioning hole 1021. The adjusting shaft 201 can move along the positioning hole 1021 to adjust the distance between the pressing piece 202 and the first plate body 101. In the embodiment, the first support 31 is arranged in a plate structure in a horizontal direction. Since the mounting base 10 is provided with the mounting shaft 104 outside the first plate body 101 for being connected with the first branch 511, the mounting base 10 and the table plate structure 4 connected with the table plate frame 5 can be installed and removed as a whole relative to the first support 31. When installing, the first support 31 is arranged in the clamping channel by extending along the opening into the receiving groove through the mounting base 10. The adjusting shaft 201 is rotated relative to the positioning hole 1021 to drive the pressing piece 202 to move axially along the positioning hole 1021 towards the first plate body 101, so as to reduce the distance between the pressing piece 202 and the first plate body 101, and the first support 31 is clamped between the pressing piece 202 and the first plate body 101 to realize quick installation of the table plate frame 5. When disassembling, the adjusting shaft 201 is rotated relative to the positioning hole 1021 to drive the pressing piece 202 to move axially along the positioning hole 1021 away from the first plate body 101, so as to increase the distance between the pressing piece 202 and the first plate body 101, and the first support 31 extends out of the clamping channel and the receiving groove along the opening to realize quick disassembly of the table plate frame 5, thereby realizing quick installation and disassembly of the table plate structure 4. The operation is simple and convenient, and the practicability is high. The threaded connection can adapt the clamping of the first support 31 with different thicknesses in the clamping channel, and the application range is wide. The mounting shaft 104 is perpendicularly connected with the outer wall of the first plate body 101, so that the mounting shaft 104 can be arranged along the first longitudinal axis a1 when the connecting device 100 is clamped on the first support 31. In other embodiments, the first support 31 can also be arranged in a flat tube structure or a circular tube structure or other structures. At this time, the inner wall of the first plate body 101 and / or the pressing piece 202 is preferably arranged in an arc structure matched with the first support 31 to improve the stability of the connection.Of course, in other embodiments, the connecting device 100 can also be detachably connected to the second support 32 or the third support 33, and the mounting shaft 104 can also be connected to the outer side of the second plate body 102 or the third plate body 103.

[0056] In some specific embodiments, the width of the first plate body 101, the second plate body 102, and the third plate body 103 is less than 5mm different from the outer diameter of the mounting shaft 104, so that the mounting base 10 can be applied to be installed in a narrow space while ensuring that the mounting shaft 104 and the mounting body can be stably connected, and is convenient to be arranged between the chair seat member 11 side and the second support 32. In the present embodiment, the width of the first plate body 101, the second plate body 102, and the third plate body 103 is the same as the outer diameter of the mounting shaft 104, so that the mounting base 10 occupies a narrower space and is more conducive to being installed in a narrow space.

[0057] As shown in Figure 8 some specific embodiments, a bonding portion 105 is formed between the mounting shaft 104 and the outer wall of the first plate body 101, and the mounting shaft 104 is combined with the outer wall of the first plate body 101 into an integral structure through the bonding portion 105, so that the mounting shaft 104 is stably connected to the first plate body 101 and is not easy to fall off, and the durability of the mounting base 10 is better, prolonging the service life of the mounting base 10. Of course, in other embodiments in which the mounting shaft 104 is connected to the second plate body 102 or the third plate body 103, the bonding portion 105 is formed between the mounting shaft 104 and the outer wall of the second plate body 102 or the third plate body 103, and is combined with the outer wall of the second plate body 102 or the third plate body 103 into an integral structure.

[0058] In some specific embodiments, the bonding portion 105 is arranged between the end face of the mounting shaft 104 and the outer wall of the first plate body 101, so that the mounting shaft 104 is connected to the first plate body 101 perpendicularly, and in other embodiments, the bonding portion 105 can also be arranged between the side face of the mounting shaft 104 and the outer wall of the first plate body 101, or in some embodiments in which the mounting shaft 104 is connected to the second plate body 102 or the third plate body 103, the bonding portion 105 is arranged between the end face of the mounting shaft 104 and the outer wall of the second plate body 102 or the third plate body 103, or the bonding portion 105 is arranged between the side face of the mounting shaft 104 and the outer wall of the second plate body 102 or the third plate body 103.

[0059] As shown in Figure 8 some specific embodiments, the mounting shaft 104 is provided in a cylindrical structure, and the first support arm 511 includes a cylindrical structure 5111 corresponding to the cylindrical structure, and the first support arm 511 is positioned in the cylindrical structure through the cylindrical structure 5111 between the first support arm 511 and the mounting shaft 104, so that the connection is tight and not easy to shake.

[0060] In some specific embodiments, the first supporting arm 511 further comprises a supporting column 5112 connected with the cylindrical structure 5111, the supporting column 5112 is coaxially arranged with the cylindrical structure 5111, and the supporting column 5112 protrudes from the side surface of the cylindrical structure 5111 to form a limiting surface 5110 for abutting against the end surface of the cylindrical structure away from the connecting part 105, so that the cylindrical structure 5111 can abut against the end surface of the cylindrical structure away from the connecting part 105 through the limiting surface 5110 after extending into the cylindrical structure, thereby limiting and supporting the first supporting arm 511 on the end surface of the cylindrical structure away from the connecting part 105, and enabling the first supporting arm 511 to stably rotate around the first longitudinal axis a1 relative to the mounting shaft 104. In other embodiments, the cylindrical structure 5111 can be fixedly connected with the mounting shaft 104 or arranged as an integral structure, and the supporting column 5112 can be arranged as two upper and lower sections that are rotatably connected with each other along the first longitudinal axis a1, or the mounting shaft 104 can be arranged as two upper and lower sections that are rotatably connected with each other along the first longitudinal axis a1, both of which can enable the lower supporting arm 51 to rotate horizontally around the first longitudinal axis a1 relative to the mounting shaft 104.

[0061] In some specific embodiments, the mounting base 10 is made of metal materials such as iron, aluminum, steel, etc., and has a solid and durable structure. The mounting base 10 is arranged as an integral structure, the mounting shaft 104 is fixedly welded with the mounting body, and the connecting part 105 is formed by a welding part. The first plate body 101 and the second plate body 102 are respectively formed by bending the two ends of the third plate body 103, which has a simple structure and is convenient for production and processing.

[0062] As shown in Figure 1 , Figure 3 In some specific embodiments, the chair back member 12 is arranged separately from the armrest structure 2, which facilitates the horizontal rotation of the armrest structure 2 around the fourth longitudinal axis a4 to adjust the direction of the armrest structure 2. The base member 13 comprises a central shaft 131, a chassis 132 connected to the lower end of the central shaft 131, and a plurality of rollers 133 arranged on the chassis 132. The seat member 11 is horizontally rotatably connected to the upper end of the central shaft 131 along the axis of the central shaft 131, and can rotate relative to the central shaft 131 and move through the rollers 133, which has a variety of functions and is flexible to use.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some technical features. These modifications or substitutions do not change the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

[0064] In summary, the above only for the preferred embodiments of the present application, any changes and modifications made in accordance with the present application patent scope, should be the scope of the present application patent cover.

Claims

1. A chair with a table, characterized in that, include: The main structure includes a seat component for a passenger to sit on, a backrest component arranged behind the seat component for a passenger to lean against, and a base component for supporting the seat component away from the surface of the medium. At least one armrest structure and an armrest frame for supporting the armrest structure, the armrest frame being connected between the armrest structure and a seat member, a base member, or a backrest member; The tabletop structure and the tabletop frame for supporting the tabletop structure are provided. The tabletop frame includes a lower support arm connected to the armrest frame or main structure via a connecting device, a connecting bracket connected to the tabletop structure, and an upper support arm arranged between the connecting bracket and the lower support arm. The upper support arm includes an upper arm body and a first connector and a second connector respectively vertically rotatably connected to both ends of the upper arm body. The connecting bracket is connected to the first connector, and the second connector is horizontally rotatably connected to the upper end of the lower support arm. The tabletop structure can be held in a horizontal position above the armrest structure for use, or held in a vertical position retracted outside the armrest structure for storage, by means of the tabletop frame. When force is applied to the tabletop structure, the deformation of the tabletop frame can switch between the use state and the storage state. The lower end of the lower support arm is spaced apart from the front side of the seat component to form a front part of the seat component in front of the lower end of the lower support arm. The upper side of the front part of the seat component and the lower support arm form an activity space for the occupant's legs to move into the seat component around the seat component when the tabletop structure is in use or in storage.

2. The seat according to claim 1, characterized in that: An open space for the table frame to rotate is formed between the bottom of the armrest structure and the front side of the armrest frame. The lower end of the lower support arm is arranged in the open space and can rotate horizontally with a connecting device that can rotate around the first longitudinal axis. The upper end is arranged in front of the armrest structure. When the table structure is rotated around the first longitudinal axis toward the side of the seat component, the upper support arm can drive the lower support arm to rotate horizontally outward around the first longitudinal axis until the upper end of the lower support arm is arranged on the outside of the armrest structure.

3. The seat according to claim 2, characterized in that: The lower support arm includes a first arm arranged along a first longitudinal axis, a second arm arranged along a second longitudinal axis, and an inclined arm connecting the upper end of the first arm and the lower end of the second arm. The second longitudinal axis is parallel to the first longitudinal axis and located on different axes. The first arm is arranged in an open space and is horizontally rotatably connected to a connecting device along the first longitudinal axis or horizontally rotatably connected to an intermediate member positioned on the connecting device along the first longitudinal axis. The second connecting member is horizontally rotatably connected to the upper end of the second arm along the second longitudinal axis and can rotate with the lower support arm relative to the connecting device around the first longitudinal axis between the front and outer sides of the armrest structure. When the second connecting member is rotated to be arranged on the front side of the armrest structure, part or all of the structure of the inclined arm is located above the upper front side of the seat and is spaced apart from the upper front side of the seat to form a first active space for the occupant's legs to extend into. When the second connecting member is rotated to be arranged on the outer side of the armrest structure, a second active space for the occupant's legs to extend into is formed between the front side of the lower support arm and the upper front side of the seat.

4. The seat according to claim 2, characterized in that: The connecting bracket includes a connecting base, a supporting base rotatably connected to the connecting base along a third longitudinal axis, and a third connecting member connected between the connecting base and the first connecting member. The table structure is connected to the supporting base. When the table structure is rotated around the third longitudinal axis, it can drive the supporting base to rotate relative to the connecting base around the third longitudinal axis to adjust the holding direction of the table structure.

5. The seat according to claim 4, characterized in that: The third connector includes a first rotating end and a second rotating end that are connected to each other. The first rotating end is rotatably connected to the connecting base along the first horizontal axis, and the second rotating end is connected to the first connector. When the table structure is rotated around the first horizontal axis, it can drive the supporting base and the connecting base to rotate relative to the third connector around the first horizontal axis to adjust the holding angle of the table structure.

6. The seat according to any one of claims 1-5, characterized in that: The upper side of the armrest structure has a support surface for supporting the table structure, and the table structure can be placed on the upper side of the support surface when it is in use.

7. The seat according to claim 6, characterized in that: The armrest frame includes a first bracket connected to the seat component, base component, or backrest component, a second bracket connected to the first bracket at its lower end, and a third bracket that is vertically connected to the second bracket. The armrest structure is connected to the upper end of the third bracket and can drive the support surface to rise or fall with the lifting and lowering movement of the third bracket. When the table structure is in use, applying force to the table structure to move it horizontally up or down can drive the upper arm body of the upper support arm to rotate vertically relative to the first and second connecting members to adjust the table structure to be placed on the upper side of the support surface at different height positions.

8. The seat according to claim 7, characterized in that: The upper arm body includes a first movable arm and a second movable arm arranged side by side below the first movable arm. The first connecting member is hinged to the ends of the first and second movable arms away from the lower support arm through a first hinge structure and a second hinge structure, respectively. The second connecting member is hinged to the ends of the first and second movable arms near the lower support arm through a third hinge structure and a fourth hinge structure, respectively. The first hinge structure, the second hinge structure, the third hinge structure, and the fourth hinge structure form a parallelogram structure. When the table structure is moved upward by force, the parallelogram structure can be deformed upward relative to the second connecting member through the first connecting member to increase the holding height of the table structure. When the table structure is moved downward by force, the parallelogram structure can be deformed downward relative to the second connecting member through the first connecting member to decrease the holding height of the table structure.

9. The seat according to claim 7, characterized in that: Two sets of armrest structures and armrest frames are respectively arranged on both sides of the seat component. The bottom of the tabletop structure has a central area and side areas arranged on opposite sides of the central area. The connecting bracket is connected to the central area of ​​the bottom of the tabletop structure. When the tabletop structure is in use, the two side areas of the bottom of the tabletop structure can be placed on the upper side of the support surface of the two armrest structures; and / or, The tabletop structure is designed to be foldable.

10. The seat according to claim 7, characterized in that: The connecting device is arranged on the side of the seat component and is detachably connected to the armrest frame or main structure. The connecting device includes a mounting base and a mounting assembly. The mounting base includes a mounting body and a mounting shaft connected to the mounting body. The mounting assembly is connected to the mounting body and can securely clamp a part of the armrest frame or main structure between the mounting body and the mounting assembly. The mounting shaft extends upward in a vertical direction, and the lower end of the lower support arm is connected to the mounting shaft.

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