Seat assembly

Abstract

The utility model discloses a seat assembly, relates to the technical field of automobiles, and aims to solve the problems that a backrest structure is complicated and the buckle structure is inconvenient to maintain and adjust due to the fact that the buckle structure is arranged on the backrest. The seat assembly comprises a backrest, a connecting rod mechanism, a table plate, a button mechanism and a locking mechanism. The connecting rod mechanism is arranged on one side of the backrest, and one end is rotationally connected with the backrest. The button mechanism is arranged on the table board and movably connected with the table board. The locking mechanism is arranged on the table board and connected with the button mechanism. The locking mechanism is used for being clamped with or separated from the connecting rod mechanism under driving of the button mechanism so as to limit rotation of the connecting rod mechanism. The seat assembly is used for a passenger to sit.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and more particularly to a seat assembly. Background Technology

[0002] As people's living standards improve, cars have gradually become the main mode of transportation for the vast majority of families. To facilitate the placement of items, tables can be installed behind the front seats of cars. These tables can be unfolded for placing items.

[0003] Generally, to keep the table folded down, the backrest is equipped with a latching mechanism that engages with the table. This keeps the table folded down and prevents it from accidentally opening during travel.

[0004] However, because the aforementioned buckle structure is located on the backrest, the structural design behind the seat back becomes more complex and inconvenient for maintenance and adjustment. Utility Model Content

[0005] This application provides a seat assembly to solve the problem that the buckle structure, when installed on the backrest, results in a complex backrest structure and makes it inconvenient to repair and adjust the buckle structure.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] This application provides a seat assembly including a backrest, a linkage mechanism, a table, a button mechanism, and a locking mechanism. The linkage mechanism is located on one side of the backrest, with one end rotatably connected to the backrest. The button mechanism is located on the table and movably connected to it. The locking mechanism is located on the table and connected to the button mechanism. The locking mechanism is used to engage or disengage with the linkage mechanism under the action of the button mechanism to restrict the rotation of the linkage mechanism.

[0008] The seat assembly provided in this application embodiment allows the button mechanism to move relative to the tabletop. Since the locking mechanism is located on the tabletop and connected to the button mechanism, the button mechanism can drive the locking mechanism to move. When the locking mechanism engages with the linkage mechanism, the linkage mechanism cannot rotate, thus keeping the tabletop fixed. This allows the tabletop to remain in the retracted state. When the locking mechanism disengages from the linkage mechanism, the linkage mechanism can rotate. This allows the tabletop to unfold under the action of the linkage mechanism for placing items. Furthermore, since the locking mechanism is located on the tabletop, there is no need for a snap-fit ​​structure on the backrest to achieve tabletop folding and fixing, simplifying the backrest structure. Additionally, having the locking mechanism on the tabletop facilitates inspection and maintenance; when maintenance is required, the tabletop can be removed for repair.

[0009] In some embodiments, the tabletop has a placement surface. The linkage mechanism includes two sets of linkage assemblies. The two sets of linkage assemblies are spaced apart along a first direction. The first direction is parallel to the placement surface. The linkage assembly includes a first link and a second link. One end of the first link is rotatably connected to the backrest, and the other end is rotatably connected to the tabletop. One end of the second link is rotatably connected to the backrest, and the other end is rotatably connected to the tabletop. The second link is also used to engage or disengage with a locking mechanism.

[0010] In some embodiments, a limiting hole is provided on the second link. A portion of the locking mechanism is used to pass through the limiting hole and engage with it.

[0011] In some embodiments, the locking mechanism includes a first locking member and two second locking members. Along a second direction, the first locking member is slidably connected to the tabletop and connected to a button mechanism. Two locking holes are formed on the locking member. The locking holes are inclined, and their extending directions intersect the second direction. The second direction is perpendicular to the first direction and parallel to the placement surface. Along the first direction, the two second locking members are slidably connected to the tabletop. One end of one second locking member is slidably connected to a locking hole. The other end of the second locking member is used to pass through a limiting hole.

[0012] In some embodiments, the locking mechanism further includes a first elastic member. Along a second direction, the first elastic member is located on one side of the first locking member, with one end connected to the first locking member and the other end connected to the tabletop. The first elastic member is used to generate a force along the second direction. Specifically, along the direction of force application of the first elastic member, the locking hole gradually approaches the first elastic member along a first direction.

[0013] In some embodiments, the number of first elastic elements is multiple.

[0014] In some embodiments, the end of the first locking member away from the locking hole has a first limiting surface. The first limiting surface is inclined and forms an angle with the placement surface. The button mechanism includes a button. The button is slidably connected to the tabletop in a direction perpendicular to the placement surface. The button has a second limiting surface. The second limiting surface is inclined and abuts against the first limiting surface.

[0015] In some embodiments, the button mechanism further includes a second elastic element. One end of the second elastic element is connected to the tabletop, and the other end is connected to the button, in a direction perpendicular to the placement surface.

[0016] In some embodiments, a mounting base is formed on the tabletop. The mounting base has a peripheral wall with a clearance hole. The peripheral wall forms a receiving cavity with an opening, a portion of which is located within the receiving cavity, and the first locking member passes through the clearance hole. A button cover is disposed at the opening, with a portion located within the receiving cavity.

[0017] In some embodiments, the linkage mechanism further includes a plurality of torsion springs. The plurality of torsion springs are respectively disposed at the ends of the first link and the second link that are connected to the backrest. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a seat assembly provided in an embodiment of this application;

[0019] Figure 2 This is one of the partial structural schematic diagrams of a seat assembly provided in an embodiment of this application;

[0020] Figure 3 for Figure 2 A schematic diagram of the internal structure of the center table;

[0021] Figure 4 This is a second schematic diagram of a partial structure of a seat assembly provided in an embodiment of this application;

[0022] Figure 5 One of the enlarged partial views of a seat assembly provided in an embodiment of this application;

[0023] Figure 6 This is a second enlarged view of a seat assembly provided in an embodiment of this application.

[0024] Figure label:

[0025] 100-Seat assembly; 10-Backrest; 20-Linkage mechanism; 21-First link; 22-Second link; 23-Linkage assembly; 24-Torsion spring; 30-Tabletop; 301-Limiting groove; 31-Mounting base; 40-Button mechanism; 41-Button; 411-Second limiting surface; 412-Limiting post; 42-Second elastic element; 50-Locking mechanism; 51-First locking element; 511-Locking hole; 512-Positioning post; 513-First limiting surface; 52-Second locking element; 521-Main body; 522-Limiting element; 53-First elastic element; 60-Mounting component. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "center", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0028] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0029] In the description of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "multiple" means two or more.

[0030] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0031] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0032] This application provides a vehicle, the specific type of which is not limited. For example, the vehicle can be an electric vehicle or a gasoline-powered vehicle. To achieve the basic functions of the vehicle, the vehicle provided in this application may include basic components such as a body, a drive mechanism, and a transmission mechanism, which will not be further described here.

[0033] like Figure 1 As shown, Figure 1 This is a structural schematic diagram of a seat assembly 100 provided in an embodiment of this application. The vehicle provided in this embodiment may also include the seat assembly 100. The seat assembly 100 provides a seating position for occupants, facilitating their seating. The seat assembly 100 may include an interconnected seat cushion (not shown) and a backrest 10. The backrest 10 allows passengers to lean against it, making the seating more comfortable.

[0034] For convenient placement of items, such as Figure 1 As shown, the seat assembly 100 provided in this embodiment may further include a linkage mechanism 20 and a table 30. The linkage mechanism 20 is disposed on one side of the backrest 10, with one end rotatably connected to the backrest 10. The table 30 is rotatably connected to the other end of the linkage mechanism 20.

[0035] Therefore, when the tabletop 30 is needed to place items, the movement of the linkage mechanism 20 can be used to open the tabletop 30. Conversely, when the tabletop 30 is not needed, the movement of the linkage mechanism 20 can be used to fold the tabletop 30, so that the tabletop 30 fits against one side of the backrest 10.

[0036] In addition, such as Figure 2 and Figure 3 As shown, Figure 2 This is one of the partial structural schematic diagrams of the seat assembly 100 provided in an embodiment of this application. Figure 3 for Figure 2 The diagram shows the internal structure of the center table 30. The seat assembly 100 may also include a button mechanism 40 and a locking mechanism 50. The button mechanism 40 is mounted on the table 30 and movably connected to it. Because the button mechanism 40 is movably connected to the table 30, it can move relative to the table 30. The locking mechanism 50 is mounted on the table 30 and connected to the button mechanism 40. Thus, the button mechanism 40 can drive the locking mechanism 50 to move.

[0037] For example, such as Figure 2 As shown, a portion of the button mechanism 40 can be mounted on the tabletop 30, while a portion is located outside the tabletop 30. This allows the user to conveniently operate the device via the button mechanism 40.

[0038] The locking mechanism 50 can be used to engage with the linkage mechanism 20 under the drive of the button mechanism 40. Figure 1The locking mechanism 50 engages or disengages with the linkage mechanism 20 to restrict its rotation. Thus, when the locking mechanism 50 engages with the linkage mechanism 20, the linkage mechanism 20 cannot rotate, thereby keeping the tabletop 30 fixed. When the tabletop 30 is in the retracted state, the locking mechanism 50 engages with the linkage mechanism 20, and the tabletop 30 remains in the retracted state. When the locking mechanism 50 disengages from the linkage mechanism 20, the linkage mechanism 20 can rotate. In this way, the tabletop 30 can unfold under the action of the linkage mechanism 20 for placing items.

[0039] Meanwhile, since the locking mechanism 50 is located on the tabletop 30, it is not necessary to install it on the backrest 10. Figure 1 A snap-fit ​​structure is provided on the tabletop 30 to achieve folding and fixing, making the structure of the backrest 10 simpler. At the same time, the locking mechanism 50 is located on the tabletop 30, which also facilitates inspection and maintenance. When the locking mechanism 50 needs to be maintained, the tabletop 30 can be removed.

[0040] Understandably, the installation location of the locking mechanism 50 can be designed according to the actual situation. For example, the locking mechanism 50 can be installed inside the tabletop 30. In this way, the tabletop 30 can act as a cover, making it difficult for the user to observe the locking mechanism 50 from the outside.

[0041] Furthermore, it is understandable that, such as Figure 1 As shown, since the linkage mechanism 20 is located outside the tabletop 30, when the locking mechanism 50 ( Figure 3 When the linkage mechanism 20 is installed inside the tabletop 30, a portion of the linkage mechanism 20 can pass through the tabletop 30 so that the locking mechanism 50 can engage with the linkage mechanism 20 to restrict the movement of the linkage mechanism 20.

[0042] In some embodiments, the tabletop 30 has a placement surface. For example... Figure 4 As shown, Figure 4 This is a second partial structural schematic diagram of the seat assembly 100 provided in this application embodiment. The linkage mechanism 20 may include two sets of linkage assemblies 23. The two sets of linkage assemblies 23 are spaced apart along a first direction X. The first direction X is parallel to the placement surface. For example, the first direction X may be the length direction of the tabletop 30.

[0043] Link assembly 23 may include a first link 21 and a second link 22. One end of the first link 21 is connected to the backrest 10 ( Figure 1 One end of the second connecting rod 22 is rotatably connected to the backrest 10, and the other end is rotatably connected to the tabletop 30. The second connecting rod 22 is also used to connect with the locking mechanism 50. Figure 3 The two sets of linkage assemblies 23 can be engaged or disengaged. Thus, the two sets of linkage assemblies 23 can form a four-bar linkage 20, making it easier to open and close the table 30.

[0044] For example, the two ends of the first link 21 and the two ends of the second link 22 can be rotatably connected via shafts, that is, the two ends of the first link 21 and the two ends of the second link 22 are rotatably connected to shafts. Furthermore, the specific shapes of the first link 21 and the second link 22 can be designed according to actual conditions, and are not further limited here.

[0045] In addition, such as Figure 4 As shown, the seat assembly 100 may further include a mounting member 60. The mounting member 60 is rotatably connected to the first link 21 and the second link 22. Simultaneously, the mounting member 60 can be mounted on the backrest 10 (…). Figure 1 The linkage assembly 23 can be mounted on the backrest 10 via the mounting piece 60.

[0046] The second link 22 can be used with the locking mechanism 50. Figure 3 () Engage or disengage. In this way, when the tabletop 30 is in the retracted state, the second link 22 engages with the locking mechanism 50, and the second link 22 cannot rotate, thereby preventing the first link 21 from rotating, so that the tabletop 30 can remain in the retracted state.

[0047] The locking mechanism 50 can be engaged with the second link 22 in different ways. In some embodiments, a limiting hole may be provided on the second link 22. A portion of the locking mechanism 50 may pass through the limiting hole and engage with it.

[0048] Understandably, the limiting hole is located outside the rotation axis of the end where the second connecting rod 22 connects to the table 30. In this way, when the locking mechanism 50 passes through the limiting hole, the second connecting rod 22 cannot rotate as a whole due to the obstruction of the locking mechanism 50, thereby locking the table 30.

[0049] Of course, in some other embodiments, a limit post can also be provided on the second link 22. Simultaneously, the locking mechanism 50 can be designed with a limit hole. In this case, the limit post on the second link 22 can pass through the limit hole. Thus, the second link 22 can remain locked under the action of the limit post and cannot rotate.

[0050] In some embodiments, such as Figure 3As shown, the locking mechanism 50 includes a first locking member 51 and two second locking members 52. Along the second direction Y, the first locking member 51 is slidably connected to the tabletop 30 and connected to the button mechanism 40. Two locking holes 511 are formed on the locking member. The locking holes 511 are inclined, and their extension direction intersects the second direction Y. The second direction Y is perpendicular to the first direction X and parallel to the placement surface. Along the first direction X, the two second locking members 52 are slidably connected to the tabletop 30. One end of one second locking member 52 is slidably connected to a locking hole 511. The other end of the second locking member 52 is used to pass through a limiting hole.

[0051] Therefore, when the button mechanism 40 drives the first locking member 51 to slide along the second direction Y, the relative position between the locking hole 511 and the second locking member 52 will change because the extension direction of the locking hole 511 intersects with the second direction Y. This causes the second locking member 52 to slide along the first direction X, allowing the other end of the second locking member 52 to extend or retract from the limiting hole.

[0052] The shape of the first locking member 51 can be designed according to actual conditions. For example, such as... Figure 3 As shown, the first locking member 51 can be approximately Y-shaped. Furthermore, the inclination direction of the locking hole 511 can also be designed according to actual conditions. For example, as... Figure 3 As shown, the locking hole 511 on the right is inclined downwards and to the right. At this time, when the first locking member 51 moves downwards, the second locking member 52 can engage with the second connecting rod 22 ( Figure 4 Alternatively, the locking hole 511 can be tilted to the upper right. In this case, when the first locking member 51 moves upward, the second locking member 52 can separate from the second connecting rod 22.

[0053] Of course, the locking mechanism 50 can also have other components to achieve engagement or disengagement with the limiting hole in other ways. For example, the locking mechanism 50 can also include only two second locking members 52. The two second locking members 52 are respectively connected to the button mechanism 40. The button mechanism 40 can directly drive the second locking members 52 to slide along the first direction X, thereby achieving disengagement or insertion with the limiting hole.

[0054] In addition, such as Figure 3 As shown, the second locking member 52 may include a main body 521 and a limiting member 522. One end of the main body 521 has a locking portion that passes through a locking hole 511, and the other end is connected to the limiting member 522. The limiting member 522 may be a bolt, which is threadedly connected to the main body 521.

[0055] In some embodiments, such as Figure 3As shown, the locking mechanism 50 also includes a first elastic member 53. Along the second direction Y, the first elastic member 53 is located on one side of the first locking member 51, with one end connected to the first locking member 51 and the other end connected to the tabletop 30. The first elastic member 53 is used to generate a force along the second direction Y. Specifically, along the direction of force application of the first elastic member 53, the locking hole 511 gradually approaches the first elastic member 53 along the first direction X.

[0056] Therefore, the locking mechanism 50 can achieve a reset effect under the action of the first elastic member 53. Because the locking hole 511 gradually approaches the first elastic member 53 along the first direction X, when the user releases the force applied to the button mechanism 40, the first locking member 51 can move under the action of the elastic force, causing the second locking member 52 to be located in the locking hole 511 at one end relatively close to the first elastic member 53 along the first direction X. This allows the other end of the second locking member 52 to move towards the limiting hole, extending into the limiting hole and achieving an automatic locking effect.

[0057] In some embodiments, such as Figure 3 and Figure 5 As shown, Figure 5 This is one of the enlarged partial views of the seat assembly 100 provided in the embodiments of this application. The number of first elastic members 53 is multiple. Therefore, by using multiple first elastic members 53, the first locking member 51 can experience a greater elastic force, thereby allowing the first locking member 51 to move better, and thus allowing the second locking member 52 to move better to a position where it can engage with the limiting hole.

[0058] The first elastic element 53 can be disposed at different positions of the first locking element 51. For example, along the second direction Y, multiple first elastic elements 53 can be disposed at both ends of the first locking element 51. In this way, the first elastic elements 53 can be disposed at different positions, making the placement of the first elastic elements 53 more convenient.

[0059] Furthermore, for example, the first elastic element 53 can be a spring. The first elastic element 53 can be sleeved around the first locking element 51, with one end abutting against the tabletop 30 and the other end abutting against the first locking element 51. Of course, the first elastic element 53 can also be other elastic components, as long as they can apply an elastic force along the second direction Y to the first locking element 51, which will not be further described here.

[0060] In particular, this is to facilitate the setting of the spring. For example... Figure 5 As shown, a positioning post 512 is formed at the end of the first locking member 51. A spring can be sleeved on the positioning post 512. Thus, by providing the positioning post 512, the installation of the spring can be facilitated, making it easier for the spring to connect with the first locking member 51.

[0061] In order to make the button mechanism 40 ( Figure 6 ) can drive the first locking element 51 along the second direction Y ( Figure 3 (to perform movement. In some embodiments, such as...) Figure 6 As shown, Figure 6 This is a second partial enlarged view of the seat assembly 100 provided in the embodiments of this application, showing the first locking member 51 located away from the locking hole 511. Figure 3 One end of the button mechanism 40 has a first limiting surface 513. The first limiting surface 513 is inclined and forms an angle with the placement surface. The button mechanism 40 includes a button 41. The button 41 is slidably connected to the tabletop 30 in a direction perpendicular to the placement surface. The button 41 has a second limiting surface 411. The second limiting surface 411 is inclined and fits against the first limiting surface 513.

[0062] Therefore, when button 41 moves in a direction perpendicular to the placement surface, since the first limiting surface 513 is in contact with the first limiting surface 513, the second limiting surface 411 can apply pressure perpendicular to the first limiting surface 513. At this time, through force decomposition, the force acting on the first limiting surface 513 can be decomposed into a force along the second direction Y ( Figure 3 The force on the first locking member 51 pushes it to move along the second direction Y, thereby enabling the first locking member 51 to drive the second locking member 52. Figure 3 ) to move, so that the second locking member 52 and the second connecting rod 22 ( Figure 1 ( ) to be connected or disconnected.

[0063] In some embodiments, such as Figure 6 As shown, the button mechanism 40 also includes a second elastic element 42. Along a direction perpendicular to the placement surface, one end of the second elastic element 42 is connected to the tabletop 30, and the other end is connected to the button 41. Thus, through the second elastic element 42, when the user releases the force applied to the button 41, the button 41 can return to its initial state under the elastic force of the second elastic element 42, achieving the reset of the button 41.

[0064] For example, such as Figure 6 As shown, the second elastic element 42 can also be a spring. To facilitate the spring's placement, a limiting groove 301 can be formed on the tabletop 30. One end of the spring can be positioned within the limiting groove. Simultaneously, a limiting post 412 can be formed on the button 41, and the other end of the spring can be fitted onto the limiting post 412.

[0065] In some embodiments, such as Figure 3As shown, a mounting base 31 is formed on the tabletop 30. The mounting base 31 has a peripheral wall, and a clearance hole is formed on the peripheral wall. The peripheral wall forms a receiving cavity with an opening, a portion of the first locking member 51 is located in the receiving cavity, and the first locking member 51 passes through the clearance hole. The button 41 is covered at the opening, and a portion of it is located in the receiving cavity.

[0066] Therefore, when the first locking member 51 slides, the peripheral wall of the mounting base 31 can act as a limit, restricting the sliding stroke of the first locking member 51. Simultaneously, since the button 41 is located at the opening and partially within the receiving cavity, the mounting base 31 can also limit the displacement of the button 41.

[0067] In some embodiments, such as Figure 4 As shown, the linkage mechanism 20 also includes multiple torsion springs 24. The multiple torsion springs 24 are respectively disposed in the first link 21 and the second link 22, and are connected to the backrest 10 (…). Figure 1 ) connected to one end. Therefore, when the locking mechanism 50 ( Figure 3 When the first link 21 and the second link 22 are separated, the first link 21 and the second link 22 can rotate under the drive of the torsion spring 24, directly opening the table 30 without the need for manual opening, making the opening of the table 30 more convenient.

[0068] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A seat assembly, characterized in that, include: Backrest; A linkage mechanism is located on one side of the backrest, with one end rotatably connected to the backrest; The tabletop is rotatably connected to the other end of the linkage mechanism; A button mechanism is disposed on the tabletop and movably connected to the tabletop; and, A locking mechanism is provided on the table and connected to the button mechanism; the locking mechanism is used to engage or disengage with the linkage mechanism under the drive of the button mechanism to restrict the rotation of the linkage mechanism.

2. The seat assembly according to claim 1, characterized in that, The tabletop has a placement surface; the linkage mechanism includes two sets of linkage assemblies; Along a first direction, two sets of the connecting rod assemblies are spaced apart; the first direction is parallel to the placement surface; The linkage assembly includes: The first connecting rod has one end rotatably connected to the backrest and the other end rotatably connected to the tabletop; as well as, The second link is rotatably connected at one end to the backrest and at the other end to the tabletop; the second link is also used to engage or disengage with the locking mechanism.

3. The seat assembly according to claim 2, characterized in that, A limiting hole is provided on the second connecting rod; a part of the locking mechanism is used to pass through the limiting hole and engage with the limiting hole.

4. The seat assembly according to claim 3, characterized in that, The locking mechanism includes: A first locking member, along a second direction, is slidably connected to the tabletop and to the button mechanism; the locking member has two locking holes; the locking holes are inclined, and their extending directions intersect the second direction; the second direction is perpendicular to the first direction and parallel to the placement surface; and... Two second locking members are slidably connected to the tabletop along the first direction; one end of one of the second locking members is slidably connected to one of the locking holes; the other end of the second locking member is used to pass through the limiting hole.

5. The seat assembly according to claim 4, characterized in that, The locking mechanism further includes: A first elastic element, along the second direction, is located on one side of the first locking element, with one end connected to the first locking element and the other end connected to the tabletop; the first elastic element is used to generate a force along the second direction. Wherein, along the direction of force application of the first elastic member, the locking hole gradually approaches the first elastic member along the first direction.

6. The seat assembly according to claim 5, characterized in that, The number of the first elastic elements is multiple.

7. The seat assembly according to claim 4, characterized in that, The first locking member has a first limiting surface at the end away from the locking hole; the first limiting surface is inclined and forms an angle with the placement surface. The button mechanism includes: The button is slidably connected to the tabletop along a direction perpendicular to the placement surface; the button has a second limiting surface; the second limiting surface is inclined and fits against the first limiting surface.

8. The seat assembly according to claim 7, characterized in that, The button mechanism further includes: The second elastic element is located in a direction perpendicular to the placement surface. One end of the second elastic element is connected to the tabletop, and the other end is connected to the button.

9. The seat assembly according to claim 8, characterized in that, A mounting base is formed on the tabletop; the mounting base has a peripheral wall; and a clearance hole is provided on the peripheral wall; the peripheral wall surrounds an accommodating cavity with an opening; a portion of the first locking member is located in the accommodating cavity, and the first locking member passes through the clearance hole; the button is covered at the opening, and a portion of it is located in the accommodating cavity.

10. The seat assembly according to claim 2, characterized in that, The linkage mechanism also includes: Multiple torsion springs are respectively disposed at the ends of the first link and the second link that are connected to the backrest.

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