Chair seat assembly method

Abstract

This invention discloses a chair seat assembly method. By simultaneously driving two symmetrically arranged positioning plates to move synchronously from top to bottom and from outside to inside, the bottom shell is clamped and pressed down. The relative position of the bottom shell and the seat frame can be continuously adjusted, as well as the posture of the seat frame on the bottom plate. Adjusting the relative posture of the seat frame and the bottom shell quickly makes the first connecting hole of the chair frame and the second connecting hole of the bottom shell coaxial, resulting in better consistency of chairs produced in batches. Furthermore, during the position adjustment process, the positioning plates do not compact the seat frame, thus not affecting the position, posture, and support effect of the mesh on the seat frame.

Description

Technical Field

[0001] This invention relates to the field of home furnishings, and more particularly to a method for assembling a chair seat. Background Technology

[0002] Since both the seat frame and the base shell of the chair are injection molded, multiple screws need to be screwed into pre-drilled holes on the seat frame and the base shell during assembly to secure them together. However, the seat frame and base shell undergo thermal expansion and contraction during storage, and a support mesh needs to be installed before assembly to support the human body. To ensure sufficient support, the mesh needs to be tightened around the seat frame, causing further deformation.

[0003] When manually assembling the seat frame and the base shell, the threaded holes of the seat frame and the base shell are not aligned. Even experienced workers need to exert a lot of effort to tilt the screws into the base shell and seat frame. This not only results in non-standard seat assembly, but also makes seat assembly difficult, demanding, and inefficient. Summary of the Invention

[0004] In order to solve the problem of difficult chair assembly caused by component deformation in the prior art, the purpose of this invention is to provide a chair assembly method that can make the chair assembly process more standardized, reduce the difficulty of chair assembly, improve the efficiency of chair assembly, and improve the quality of the finished chair.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A chair seat assembly method utilizes a device comprising a base plate, on which multiple limiting components are provided, and two symmetrically arranged positioning plates are mounted above the base plate. A driving assembly is also mounted above the base plate, capable of driving the two positioning plates to swing synchronously. The chair seat comprises a seat frame and a bottom shell. The seat frame is covered with a mesh, and the seat frame includes a seat surface and a first connecting surface, which are arranged opposite to each other. Multiple first connecting posts protrude from the first connecting surface, and each first connecting post has a first connecting hole. The bottom shell includes a second connecting surface and a working surface, which are arranged opposite to each other. The second connecting surface has a recessed first receiving groove, within which multiple second connecting posts protrude, and each second connecting post has a second connecting hole. The multiple first connecting posts and multiple second connecting posts correspond one-to-one. The specific steps for assembling the chair seat are as follows:

[0006] Step 1) Cover the seat frame with a mesh, and then fasten the bottom shell onto the seat frame to complete the rough positioning of the seat frame and the bottom shell; wherein, the seat surface of the seat frame faces down, the working surface of the bottom shell faces up, and the first connecting post on the seat frame is inserted into the first receiving groove of the bottom shell.

[0007] Step 2) Place the seat frame inside multiple limiting members, which hold the seat frame in place; wherein, the symmetrical planes of the two positioning plates coincide with the mid-plane of the seat frame.

[0008] Step 3): The drive assembly drives the two positioning plates to swing from the outside to the inside. One of the positioning plates first abuts against the working surface of the bottom shell, driving the bottom shell to move on the seat frame. When both positioning plates contact the bottom shell at the same time, the two positioning plates clamp the bottom shell, forcing the bottom shell to move downward and deform. When the first connecting post of the seat frame is inserted into the second connecting hole of the bottom shell, the two positioning plates slide relative to the bottom shell, and the two positioning plates press down on the bottom shell, forcing the bottom shell and the seat frame to unfold. When the first connecting hole of the seat frame and the second connecting hole of the bottom shell are coaxial, the two positioning plates stop moving.

[0009] Step 4) Screw the screws one by one into the second connecting hole and the first connecting hole, then move the positioning plate away from the seat and take out the assembled seat.

[0010] Preferably, the base plate is rotatably mounted on the base.

[0011] Preferably, the limiting member includes two first limiting rods and two second limiting rods, the two second limiting rods are located behind the two first limiting rods, and the distance between the two second limiting rods is less than the distance between the two first limiting rods; in step 2) above, the rear end of the chair seat is first inserted between the two first limiting rods, and then extends out from between the two second limiting rods, so that the two limiting groups abut against the left and right sides of the seat frame respectively.

[0012] Preferably, the limiting component includes multiple limiting plates, each with an oblong hole, and screws pass through the oblong holes to secure the limiting plate to the base plate.

[0013] Preferably, the seat frame has flanges protruding around its perimeter, and the mesh covers the seat surface and flanges of the seat frame; in step 4), the second connecting surface of the bottom shell abuts against the mesh covering the flanges.

[0014] Preferably, the middle part of the bottom shell is raised upwards. In step 3), after one positioning plate abuts against the raised part of the bottom shell, it presses down on the bottom shell and pushes the bottom shell inwards. When both positioning plates abut against the bottom shell at the same time, the two positioning plates clamp the raised part of the bottom shell, forcing the bottom shell to deform. When the first connecting column of the seat frame is inserted into the second connecting hole of the bottom shell, the seat frame and the bottom shell are fastened together, and the positioning plates slide relative to the bottom shell. The two positioning plates press down on the left and right sides of the bottom shell at the same time, forcing the bottom shell to press down on the seat frame, so that the bottom shell and the seat frame unfold, and the first connecting hole and the second connecting hole gradually become coaxial.

[0015] Preferably, a flexible pressure block is fixed on the positioning plate, and the positioning plate is connected to the bottom shell through the pressure block.

[0016] Preferably, the drive assembly includes a cylinder capable of driving the two positioning plates to move synchronously.

[0017] Preferably, the drive assembly includes a synchronization plate connected to the extension and retraction end of the cylinder, and two positioning plates are both connected to the synchronization plate.

[0018] Preferably, the middle positions of the left and right sides of the first connecting surface on the seat frame are raised upwards, and the second connecting surface of the bottom shell matches the first connecting surface; in step 1) above, the front and rear ends of the seat frame support the front and rear ends of the bottom shell, and the first connecting post and the second connecting post located in the middle positions of the front and rear sides of the seat correspond to each other.

[0019] The beneficial effects of the technical solution of the present invention are as follows: by quickly coaxializing the first connecting hole of the seat frame and the second connecting hole of the bottom shell, the assembly difficulty of the seat is further reduced, the assembly efficiency of the seat is improved, and the assembly process of the seat is made more standardized; and the seat assembled by the above method is closer to the design drawing, and the quality of the finished chair is further guaranteed; in the above method, by using two symmetrically arranged positioning plates and the synchronous movement posture of the two positioning plates from top to bottom and from outside to inside, the relative position of the bottom shell and the seat frame can be continuously adjusted, and the posture of the seat frame on the bottom plate is also continuously adjusted, and the relative posture of the seat frame and the bottom shell is adjusted, so that the consistency of the mass-produced seats is better; and during the position adjustment process, the positioning plates do not press the seat frame, and therefore will not affect the position, posture and support effect of the mesh on the seat frame. Attached Figure Description

[0020] Figure 1 A schematic diagram showing the connection between the chair seat and the assembly equipment;

[0021] Figure 2 A schematic diagram of the decoupling strands for chair seat assembly equipment;

[0022] Figure 3 A schematic diagram of the connection structure between the lever assembly and the drive assembly;

[0023] Figure 4 This is a schematic diagram of the lever assembly.

[0024] Figure 5 This is a schematic diagram of the second link;

[0025] Figure 6 This is a structural schematic diagram of the seat frame;

[0026] Figure 7 This is a schematic diagram of the bottom shell structure;

[0027] Figure 8 This is a schematic diagram of the chair seat structure;

[0028] Figure 9 This is a schematic diagram of the connection structure between the seat frame and the bottom shell.

[0029] Reference numerals: 11. Base plate; 12. First limiting rod; 121. First crossbeam; 13. Second limiting rod; 131. Second crossbeam; 14. Support plate; 15. Limiting plate; 17. Bearing;

[0030] 21. Mounting base; 22. Cylinder; 221. Telescopic end; 23. Synchronizing plate;

[0031] 31. First connecting rod; 32. Second connecting rod; 321. First connection position; 322. Second connection position; 323. Third connection position; 33. Third connecting rod; 34. Fourth connecting rod; 341. Clearance hole; 35. Fifth connecting rod; 36. Connecting seat; 37. Connecting plate; 38. Positioning plate; 39. Pressure block;

[0032] 4. Seat frame; 41. First connecting surface; 42. First connecting post; 43. First connecting hole; 45. Seat surface; 47. Flange;

[0033] 5. Bottom shell; 51. First receiving groove; 52. Second connecting post; 53. Second connecting hole; 56. Second connecting surface; 57. Functional surface;

[0034] 61. First hinge axis; 62. Second hinge axis; 63. Third hinge axis; 64. Fourth hinge axis; 65. Fifth hinge axis; 66. Sixth hinge axis. Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] Furthermore, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more, unless explicitly defined otherwise.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] The orientation described in the following embodiments is... Figure 1 The directions shown are for reference. Figure 1 In the middle, the position of the base plate is the bottom, the position of the drive plate is the top, the position of the first limit rod is the front, the middle position of the base plate is the inside, and the positions around the base plate are the outside. Example

[0041] A method for assembling a chair seat, using a device such as Figures 1 to 5 As shown, the device includes a base plate 11, on which multiple limiting members are provided. Two symmetrically arranged positioning plates 38 are mounted above the base plate 11. A driving assembly is also mounted above the base plate 11, capable of driving the two positioning plates 38 to swing synchronously. Figures 6 to 9 As shown, the chair seat includes a seat frame 4 and a bottom shell 5. The seat frame 4 is covered with a mesh. The seat frame 4 includes a seat surface 45 and a first connecting surface 41, which are arranged opposite to each other. Multiple first connecting posts 42 protrude from the first connecting surface 41, and each first connecting post 42 has a first connecting hole 43. The bottom shell 5 includes a second connecting surface 56 and a working surface 57, which are arranged opposite to each other. The second connecting surface 56 has a recessed first receiving groove 51, within which multiple second connecting posts 52 protrude, and each second connecting post 52 has a second connecting hole 53. The multiple first connecting posts 42 and the multiple second connecting posts 52 correspond one-to-one. The specific steps for assembling the chair seat are as follows:

[0042] Step 1) Cover the seat frame 4 with a mesh, and then fasten the bottom shell 5 onto the seat frame 4 to complete the rough positioning of the seat frame 4 and the bottom shell 5; wherein, the seat surface 45 of the seat frame 4 faces down, the working surface 57 of the bottom shell 5 faces up, and the first connecting post 42 on the seat frame 4 is inserted into the first receiving groove 51 of the bottom shell 5.

[0043] Step 2): Place the seat frame 4 inside multiple limiting members, which hold the seat frame 4 in place; wherein, the symmetrical planes of the two positioning plates 38 coincide with the midpoint of the seat frame 4.

[0044] Step 3) The drive assembly drives the two positioning plates 38 to swing from the outside to the inside. One of the positioning plates 38 first abuts against the working surface 57 of the bottom shell 5, driving the bottom shell 5 to move on the seat frame 4. When both positioning plates 38 contact the bottom shell 5 at the same time, the two positioning plates 38 clamp the bottom shell 5, forcing the bottom shell 5 to move downward and deform. When the first connecting post 42 of the seat frame 4 is inserted into the second connecting hole 53 of the bottom shell 5, the two positioning plates 38 slide relative to the bottom shell 5, and the two positioning plates 38 press down on the bottom shell 5, forcing the bottom shell 5 and the seat frame 4 to unfold. When the first connecting hole 43 of the seat frame 4 and the second connecting hole 53 of the bottom shell 5 are coaxial, the two positioning plates 38 stop moving.

[0045] Step 4) Use a screwdriver to screw multiple screws one by one into the second connecting hole 53 and the first connecting hole 43 to fix the seat frame 4 and the bottom shell 5 together.

[0046] This configuration, by quickly coaxializing the first connecting hole 43 of the seat frame and the second connecting hole 53 of the base shell 5, further reduces the assembly difficulty of the seat, improves the assembly efficiency, and makes the assembly process more standardized. Furthermore, the seat assembled using this method closely resembles the design drawings, further ensuring the quality of the finished chair. In this method, the symmetrically arranged positioning plates 38, and their synchronized movement from top to bottom and from outside to inside, continuously adjust the relative position of the base shell 5 and the seat frame 4, as well as the posture of the seat frame 4 on the base plate 11, thus improving the consistency of mass-produced seats. Moreover, during the position adjustment process, the positioning plates 38 do not compress the seat frame, thus not affecting the position, posture, and support effect of the mesh on the seat frame 4.

[0047] like Figures 6 to 9 As shown, the seat frame 4 includes four sides connected end to end in sequence. The four sides of the seat frame 4 are all curved, with the middle position of the two sides on the front and rear sides bulging downwards and the middle position of the two sides on the left and right sides bulging upwards. The second connecting surface 56 matches the first connecting surface 41. The second connecting surface 56 of the bottom shell 5 also includes four sides connected end to end. The four sides of the seat frame 4 are all curved, with the two sides on the front and rear sides bulging downwards and the two sides on the left and right sides bulging upwards. In step 1), the first connecting post 42 and the second connecting post 52, which are located at the middle positions of the front and rear ends of the seat, are aligned, and then the seat is placed on the bottom plate 11. During this process, the front and rear ends of the shell are supported by the front and rear ends of the seat frame 4.

[0048] like Figure 1 , Figure 7 , Figure 8 and Figure 9 As shown, the central portion of the working surface 57 on the bottom shell 5 protrudes upwards; in step 3) above, after one positioning plate 38 abuts against the protruding portion of the bottom shell 5, it presses the bottom shell 5 downwards and pushes the bottom shell 5 inwards; when both positioning plates 38 abut against the bottom shell 5 simultaneously, the two positioning plates 38 clamp the protruding portion of the bottom shell 5, forcing the bottom shell 5 to deform; when the first connecting post 42 of the seat frame 4 is inserted into the second connecting hole 53 of the bottom shell 5, the seat frame 4 and the bottom shell 5 are fastened together, and the positioning plates 38 slide relative to the bottom shell 5. The two positioning plates 38 simultaneously press down on the left and right sides of the bottom shell 5, forcing the bottom shell 5 to press down on the seat frame 4, causing the bottom shell 5 and the seat frame 4 to unfold, and gradually making the first connecting hole 43 and the second connecting hole 53 coaxial. With this configuration,

[0049] like Figure 6 and Figure 9As shown, the seat frame 4 has flanges 47 protruding outwards around its perimeter. In step 1), the mesh covers the seat surface 45 and flanges 47 of the seat frame 4. In step 4), after the seat frame 4 and the base shell 5 are fixed, the second connecting surface 56 of the base shell 5 abuts against the mesh covering the flanges 47. This arrangement further improves the stability and safety of the chair seat.

[0050] A chair seat assembly device, applying the above-mentioned chair seat assembly method, such as... Figures 1 to 5 As shown, the chair assembly equipment includes a positioning bracket, a drive assembly, and two sets of identical positioning assemblies. The positioning bracket includes the aforementioned base plate 11 and the aforementioned limiting member. The positioning bracket also includes two symmetrically arranged limiting groups, each including a first limiting rod 12 and a second limiting rod 13. Both the first limiting rod 12 and the second limiting rod 13 are fixed to the base plate 11, and the distance between the two first limiting rods 12 is less than the distance between the two second limiting rods 13. The drive assembly is mounted on the positioning bracket and can drive the two sets of positioning assemblies to move synchronously. The positioning assembly is positioned... Above the base plate 11, the positioning assembly includes a first connecting rod 31, a second connecting rod 32, a third connecting rod 33, and a fourth connecting rod 34. The upper end of the first connecting rod 31 is connected to the drive assembly, the lower end of the first connecting rod 31 is hinged to the upper end of the second connecting rod 32, the middle position of the second connecting rod 32 is hinged to the positioning bracket, and the lower end of the second connecting rod 32 is hinged to the fourth connecting rod 34. The upper end of the third connecting rod 33 is hinged to the positioning bracket, and the lower end of the fourth connecting rod 34 is hinged to the upper end of the fourth connecting rod 34. Two positioning plates 38 are respectively installed at the bottom of the fourth connecting rod 34 in the two positioning assemblies. In step 2) above, as... Figure 1 As shown, the initially positioned chair seat is inserted between the two first limiting rods 12, and the rear end of the chair seat protrudes between the two second limiting rods 13. The two limiting groups abut against the left and right sides of the chair seat respectively. In step 3) above, the drive assembly drives the upper end of the first connecting rod 31 to move downward, the lower end of the first connecting rod 31 pushes the second connecting rod 32, the second connecting rod 32 rotates around its hinge point with the positioning bracket, the lower end of the second connecting rod 32 drives the fourth connecting rod 34 to swing from the outside to the inside, and the third connecting rod 33 pushes the upper end of the fourth connecting rod 34, accelerating the swing of the fourth connecting rod 34. With this configuration, the connecting rods and the positioning bracket form a stable linkage structure and can speed up the assembly efficiency of the chair seat.

[0051] In this embodiment, as Figure 1 and Figure 2As shown, the positioning bracket further includes a first crossbeam 121, a second crossbeam 131, and a support plate 14. The first limiting rod 12 and the second limiting rod 13 are both vertically arranged, with their bottoms fixedly connected to the base plate 11. The two ends of the first crossbeam 121 are fixedly connected to the tops of the two first limiting rods 12, and the two ends of the second crossbeam 131 are connected to the tops of the two second limiting rods 13. The two ends of the support plate 14 are connected to the first crossbeam 121 and the second crossbeam 131, respectively. This arrangement ensures the stability of the limiting structure while also allowing it to act as a support, thus simplifying the equipment structure. More preferably, the limiting component also includes multiple limiting plates 15, each with a slotted hole through which screws pass to fix the limiting plate 15 to the base plate 11. With this configuration, the position and angle of the limiting plate 15 on the base plate 11 can be effectively adjusted through the waist-shaped hole, so that the positioning space formed by the multiple limiting plates 15, the first limiting rod 12 and the second limiting rod 13 is more in line with the chair seat.

[0052] More preferably, the base plate 11 is rotatably mounted on the base via a bearing 17; in step 4) above, rotating the base plate 11 moves the connection hole where the screws are not screwed in to the front. This arrangement further reduces assembly difficulty and improves assembly efficiency. More preferably, the base plate 11 is disc-shaped; this makes the equipment smaller and easier to rotate.

[0053] In this embodiment, as Figure 1 and Figure 2 As shown, the two limiting groups and two positioning components correspond one-to-one, with the positioning components located between the first limiting rod 12 and the second limiting rod 13. More preferably, the symmetry planes of the two limiting groups and the symmetry planes of the two positioning components coincide. This arrangement improves assembly accuracy.

[0054] In this embodiment, as Figure 1 and Figure 2 As shown, the drive assembly includes a mounting base 21 and a cylinder 22. The mounting base 21 is fixed on the support plate 14 of the positioning bracket. The cylinder body of the cylinder 22 is mounted on the mounting base 21. The telescopic end 221 of the cylinder 22 moves up and down. Two positioning components are respectively located on both sides of the cylinder 22, with the cylinder 22 positioned in the middle of the two positioning components. The first connecting rods 31 of both positioning components are connected to the telescopic end 221 of the cylinder 22. This arrangement, by limiting the positions of the positioning components and the cylinder 22, and limiting the two positioning components to share a single power source, improves the synchronization of the movements of the two positioning components, further enhancing the assembly accuracy of the chair seat.

[0055] Further preferably, the drive assembly also includes a synchronization plate 23, which is fixed to the telescopic end 221 of the cylinder 22. The synchronization plate 23 is located above the support plate 14, and its two ends are respectively hinged to the upper ends of the first connecting rods 31 of the two positioning components. This arrangement further improves the synchronization of the two positioning components.

[0056] In this embodiment, as Figures 3 to 5 As shown, the positioning assembly also includes a connecting seat 36. The two connecting seats 36 of the two positioning assemblies are respectively fixedly installed on the left and right sides of the mounting base 21. The first connecting rod 31 is hinged to the synchronous plate 23 via a first hinge shaft 61, the first connecting rod 31 is hinged to the second connecting rod 32 via a second hinge shaft 62, the second connecting rod 32 is hinged to the connecting seat 36 via a third hinge shaft 63, the second connecting rod 32 is hinged to the fourth connecting rod 34 via a fourth hinge shaft 64, the third connecting rod 33 is hinged to the connecting seat 36 via a fifth hinge shaft 65, and the third connecting rod 33 is hinged to the fourth connecting rod 34 via a sixth hinge shaft 66. This configuration reduces the height of the equipment, making it smaller and more compact.

[0057] More preferably, the positioning assembly includes two second links 32, and the connecting seat 36, the first link 31, the third link 33 and the fourth link 34 are all located between the two second links 32.

[0058] In this embodiment, as Figure 4 As shown, the positioning assembly also includes a fifth link 35, which is located below the third link 33. The upper end of the fifth link 35 is hinged to the connecting seat 36 and the second link 32 through the third hinge shaft 63, and the lower end of the fifth link 35 is hinged to the connecting rod and the second link 32 through the fourth hinge shaft 64.

[0059] Further preferred options include Figure 4 As shown, the fourth link 34 has a clearance hole 341, the bottom of the fifth link 35 is inserted into the clearance hole 341, and the fourth hinge shaft 64 passes through the clearance hole 341.

[0060] More preferably, the distance between the sixth hinge shaft 66 and the fourth hinge shaft 64 is greater than the distance between the bottom of the fourth link 34 of the fourth hinge shaft 64. More preferably, the length of the fifth link 35 is greater than the length of the third link 33. This arrangement makes the movement of the positioning plate 38 more stable.

[0061] In this embodiment, as Figures 3 to 5As shown, the second connecting rod 32 is provided with a first connecting position 321, a second connecting position 322, and a third connecting position 323. A second hinge shaft 62 is located at the first connecting position 321, a third hinge shaft 63 is located at the second connecting position 322, and a fourth hinge shaft 64 is located at the third connecting position 323. The second connecting rod 32 is connected to the first connecting rod 31, the positioning bracket, and the fourth connecting rod 34 through the first connecting position 321, the second connecting position 322, and the third connecting position 323, respectively. The first connecting position 321, the second connecting position 322, and the third connecting position 323 are arranged in a triangular pattern. This arrangement makes the transmission path and movement process of the positioning component more stable.

[0062] Further preferably, the distance between the first connecting position 321 and the second connecting position 322 is greater than the distance between the second connecting position 322 and the third connecting position 323. This arrangement, by positioning the internal travel lever structure and linkage structure of the component, not only achieves a force-increasing effect but also stabilizes the transmission.

[0063] In this embodiment, as Figures 1 to 5 As shown, a connecting plate 37 is fixedly installed at the bottom of the fourth connecting rod 34. An adjustment hole, which is oblong in shape, is provided on the connecting plate 37. A screw passes through the oblong hole and is threadedly connected to the positioning plate 38, thereby fixing the positioning plate 38 to the fourth connecting rod 34. This arrangement allows adjustment of the relative position between the positioning plate 38 and the fourth connecting rod 34 via the oblong hole, thereby adjusting the relative position between the positioning plate 38 and the bottom shell 5, as well as the force applied to the bottom shell 5.

[0064] Preferably, a flexible pressure block 39 is mounted on the positioning plate 38. The positioning plate 38 is connected to the bottom shell 5 through the pressure block 39, thereby better protecting the surface of the bottom shell 5 structure. The pressure block 39 is made of rubber, urethane, or the like.

[0065] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A method of assembling a chair seat, characterized by: An application device is provided, the device includes a base plate (11), a plurality of limiting members are provided on the base plate (11), two symmetrically arranged positioning plates (38) are installed on the top of the base plate (11), and a driving component is also installed on the top of the base plate (11), the driving component can drive the two positioning plates (38) to swing synchronously; The chair seat includes a seat frame (4) and a bottom shell (5). The seat frame (4) is covered with a mesh. The seat frame (4) includes a seat surface (45) and a first connecting surface (41). The seat surface (45) and the first connecting surface (41) are arranged opposite to each other. The first connecting surface (41) has a plurality of first connecting posts (42) protruding from it. The first connecting posts (42) have first connecting holes (43) formed on them. The bottom shell (5) includes a second connecting surface (56) and a working surface (57). The second connecting surface (56) and the working surface (57) are arranged opposite to each other. The second connecting surface (56) has a recessed first receiving groove (51). The first receiving groove (51) has a plurality of second connecting posts (52) protruding from it. The second connecting posts (52) have second connecting holes (53) formed on them. The plurality of first connecting posts (42) and the plurality of second connecting posts (52) correspond one-to-one. The specific steps for assembling the chair seat are as follows: Step 1), cover the seat frame (4) with a mesh, and then fasten the bottom shell (5) onto the seat frame (4) to complete the rough positioning of the seat frame (4) and the bottom shell (5); wherein, the seat surface (45) of the seat frame (4) faces down, the working surface (57) of the bottom shell (5) faces up, and the first connecting post (42) on the seat frame (4) is inserted into the first receiving groove (51) of the bottom shell (5); Step 2), place the seat frame (4) inside multiple limiting members, and the multiple limiting members will hold the seat frame (4) in place; wherein, the symmetrical planes of the two positioning plates (38) coincide with the mid-section of the seat frame (4); Step 3), the drive assembly drives the two positioning plates (38) to swing from the outside to the inside. One of the positioning plates (38) first abuts against the working surface (57) of the bottom shell (5), driving the bottom shell (5) to move on the seat frame (4). When the two positioning plates (38) contact the bottom shell (5) at the same time, the two positioning plates (38) clamp the bottom shell (5), forcing the bottom shell (5) to move down and deform. When the first connecting post (42) of the seat frame (4) is inserted into the second connecting hole (53) of the bottom shell (5), the two positioning plates (38) slide relative to the bottom shell (5), and the two positioning plates (38) press down on the bottom shell (5), forcing the bottom shell (5) and the seat frame (4) to unfold. When the first connecting hole (43) of the seat frame (4) and the second connecting hole (53) of the bottom shell (5) are coaxial, the two positioning plates (38) stop moving. Step 4), screw multiple screws into the second connecting hole (53) and the first connecting hole (43) one by one, and then move the positioning plate (38) away from the seat and take out the assembled seat.

2. A method of assembling a seat as claimed in claim 1, wherein: The base plate (11) is rotatably mounted on the base.

3. The chair seat assembly method according to claim 1, characterized in that: It also includes two symmetrically arranged limiting groups, each including a first limiting rod (12) and a second limiting rod (13). The two second limiting rods (13) are located behind the two first limiting rods (12), and the distance between the two second limiting rods (13) is less than the distance between the two first limiting rods (12). In step 2) above, the rear end of the chair seat is first inserted between the two first limiting rods (12), and then extends out from between the two second limiting rods (13), so that the two limiting groups are respectively pressed against the left and right sides of the seat frame (4).

4. The chair seat assembly method according to claim 1, characterized in that: The limiting component includes multiple limiting plates (15), and the limiting plates (15) have waist-shaped holes. Screws pass through the waist-shaped holes to fix the limiting plates (15) onto the base plate (11).

5. A chair seat assembly method according to claim 1, characterized in that: The seat frame (4) has flanges (47) protruding around its perimeter. The mesh covers the seat surface (45) and flanges (47) of the seat frame (4). In step 4), the second connecting surface (56) of the bottom shell (5) abuts against the mesh covering the flanges (47).

6. A chair seat assembly method according to claim 1, characterized in that: The central part of the bottom shell (5) is raised upward. In step 3), after a positioning plate (38) abuts against the raised part of the bottom shell (5), it presses down on the bottom shell (5) and pushes the bottom shell (5) inward. When the two positioning plates (38) abut against the bottom shell (5) at the same time, the two positioning plates (38) clamp the raised part of the bottom shell (5), forcing the bottom shell (5) to deform. When the first connecting post (42) of the seat frame (4) is inserted into the second connecting hole (53) of the bottom shell (5), the seat frame (4) and the bottom shell (5) are fastened together, and the positioning plate (38) slides relative to the bottom shell (5). The two positioning plates (38) press down on the left and right sides of the bottom shell (5) at the same time, forcing the bottom shell (5) to press down on the seat frame (4), so that the bottom shell (5) and the seat frame (4) unfold, and the first connecting hole (43) and the second connecting hole (53) gradually become coaxial.

7. A chair seat assembly method according to claim 1, characterized in that: A flexible pressure block (39) is fixed on the positioning plate (38), and the positioning plate (38) is connected to the bottom shell (5) through the pressure block (39).

8. A chair seat assembly method according to claim 1, characterized in that: The drive assembly includes a cylinder (22) that can drive two positioning plates (38) to move synchronously.

9. A chair seat assembly method according to claim 8, characterized in that: The drive assembly includes a synchronization plate (23), which is connected to the telescopic end of the cylinder (22), and two positioning plates (38) are connected to the synchronization plate (23).

10. A chair seat assembly method according to claim 1, characterized in that: The middle position of the left and right sides of the first connecting surface (41) on the seat frame (4) is raised upward, and the second connecting surface (56) of the bottom shell (5) matches the first connecting surface (41); in the above step 1), the front and rear ends of the seat frame (4) support the front and rear ends of the bottom shell (5), and the first connecting column (42) and the second connecting column (52) located in the middle position of the front and rear sides of the seat correspond to each other.

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