Method and apparatus for assembling a chair seat

Abstract

The application discloses a kind of assembly method and equipment of chair seat, wherein when chair seat is assembled, cover piece sponge cushion and intermediate plate are sequentially placed into accommodating groove, four side walls of accommodating groove push cover piece, and the edge of the periphery of cover piece is upturned;The left and right sides of intermediate plate are pressed down, and intermediate plate and sponge cushion are deformed under pressure;The edge of cover piece is inserted between the clamping hook along the edge of intermediate plate and intermediate plate;Pull the puller to pull out part of the belt from the cover piece, so that the edge of the cover piece is tightened;The belt is tightened and moved up to the clamping hook;After the belt is tightened and fixed, the chair seat is removed.In this way, the cover piece is tightened at least twice without human power, and the cover piece covering the sponge cushion and the intermediate plate is more regular, which can prevent the edge of the cover piece from moving on the intermediate plate, and also facilitates the disassembly of the chair seat.

Description

Technical Field

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

[0002] In the chair manufacturing process, most furniture manufacturers still use manual nailing. That is, the mesh used to cover the chair is manually flattened and then folded up to wrap around the edge of the seat. During the wrapping process, a nail gun is used to fix the mesh to the seat. This method means that the support of the mesh comes entirely from the workers, and the edges of the mesh are messy and disorganized.

[0003] Patent document CN112471807A discloses a method for installing fabric on a chair and its frame. Step 1: Install steel wire ropes onto the fabric, forming a circle around the edge of the fabric. Step 2: Place the chair frame on a workbench between two clamping components, then initially fix the fabric to the chair frame, ensuring the two ends of the steel wire ropes in the fabric are positioned at the front of the chair frame. Step 3: Use two second cylinders to drive two clamping components to move towards each other, clamping the left and right sides of the chair frame and forcing the chair frame to pre-deform. Step 4: Through... Two first cylinders drive two tensioning components to move towards each other, and then the two ends of the crossed steel wire rope are respectively installed on the two tensioning components. Then, the two first cylinders drive the two tensioning components to return along the original path to stretch the steel wire rope so that the steel wire rope and the fabric are tightly attached to the chair frame and are in a taut state. Step 5: Remove the two ends of the steel wire rope from the tensioning components, and then fix the two ends of the steel wire rope to the chair frame, thereby fixing the fabric to the chair frame. Step 6: Two second cylinders drive two clamping components to return along the original path, and then remove the chair frame from the workbench.

[0004] In existing methods, since the fabric is meant to cover the chair frame, when the two clamping devices move in opposite directions, the clamping devices and the chair frame will clamp the fabric. Consequently, during the pulling of the steel cable, the fabric clamped by the clamping devices and the chair frame is difficult to pull out. Therefore, the supporting force on the fabric only comes from the force that stretches the fabric when the chair frame returns to its shape. Furthermore, since the fabric is wrapped around the chair frame, there is no fixed relationship between the chair frame and the fabric. During chair use, the chair often rubs against the seat or backrest, making the fabric on the seat or backrest more prone to shifting and affecting the fabric's supporting effect. Summary of the Invention

[0005] To address the issues of insufficient support force of the cover components and the ease with which the chair seat can shift during use in existing technologies, the present invention aims to provide a chair seat assembly method and apparatus. The cover components covering the chair seat can obtain greater support force, and the cover components on the chair seat are not fixed to other components by means of nails or screws, and the cover components on the chair seat can also be prevented from shifting.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a chair seat assembly method, applied to a chair seat assembly device, the chair seat assembly device including a worktable, a positioning mold, a pressing component, and a pull-out component; the positioning mold is fixed on the worktable, and a receiving groove is provided on the top of the positioning mold; the pressing component is arched, the pressing component is located above the positioning mold, the pressing component is mounted on the worktable in a liftable manner, and the pressing component is located above the receiving groove; the pull-out component is slidably mounted on the worktable, and the pull-out component is located above the positioning mold; the chair seat includes a sponge cushion, a middle plate, and a covering component, the sponge cushion including a seat surface and a first connecting surface arranged opposite each other; the middle plate includes a first positioning surface and a second positioning surface arranged opposite each other, the second positioning surface is provided with a plurality of hook-shaped hooks, the plurality of hooks being arranged along the edge of the middle plate; a strap is threaded through the edge of the covering component, the two ends of the strap extending from the covering component; The steps for assembling the chair seat are as follows: Step 1), place the covering part in the receiving groove of the positioning mold, install the middle plate on the sponge cushion, press the seat surface of the sponge cushion down on the covering part, and then place the sponge cushion and the middle plate in the receiving groove. The four side walls of the receiving groove push the covering part, so that the edges of the covering part are raised upward. Step 2) The pressing component moves downward and presses down on both sides of the middle plate, causing the middle plate and the sponge cushion to deform under pressure; Step 3) The covering component wraps around the edge of the middle plate and inserts the edge of the covering component between the hook and the second positioning surface; Step 4) The end of the strap is hooked onto the pull-out component, and the pull-out component slides to pull part of the strap out from the covering component, tightening the edge of the covering component. The covering component tightly wraps the sponge cushion and the middle plate at one time; Among them, the pull-out component is located above the positioning mold, so that the strap moves upward during the tightening process. When the strap moves, it can drive the edge of the covering component to move upward and insert the edge of the covering component into the hook; Step 5) After the strap is tightened, the strap is tied and fixed, and then the pressing component moves upward and then the assembled sponge cushion, middle plate and covering component are taken out from the positioning mold.

[0007] Preferably, the pressure member is a frame structure.

[0008] Preferably, the receiving groove includes a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall that are connected sequentially. The first and third sidewalls are arranged front to back, and the second and fourth sidewalls are arranged left to right. The height of the first and third sidewalls is greater than the height of the second and fourth sidewalls.

[0009] Preferably, the receiving groove includes an arched bottom surface.

[0010] Preferably, the pull-out part has a serrated groove, and the buckle is used to hook the strap.

[0011] Preferably, the covering is made of fabric.

[0012] Preferably, the first connecting surface of the sponge cushion is provided with a plurality of grooves, wherein the plurality of grooves are provided along the edge of the first connecting surface.

[0013] Preferably, the sponge seat cushion includes a leg support area and a hip support area, with multiple grooves disposed in the leg support area and the multiple grooves dividing the hip support area into left and right parts.

[0014] A chair seat assembly device, which applies the above-mentioned chair seat assembly method, includes a worktable, a positioning mold, a pressing component, and a pull-out component.

[0015] The beneficial effects of the technical solution of the present invention are as follows: the above method can quickly cover the sponge cushion and the middle plate; the hook on the middle plate facilitates the positioning of the edge of the covering, making the covering of the sponge cushion and the middle plate more regular; on the other hand, when the middle plate is released after the pressing part is released, during the process of the middle plate and the sponge cushion returning to their shape, the hook can hook the edge of the covering, preventing the edge of the covering from moving on the second positioning surface of the middle plate when the sponge cushion and the middle plate support the covering, thus improving the production quality of the chair seat; and during the above assembly process, the covering is tightened twice, so that the assembled chair seat can obtain a better support effect. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of a chair seat assembly device. Figure 1 ; Figure 2 A schematic diagram of the structure of a chair seat assembly device. Figure 1 ; Figure 3 Schematic diagram of the positioning module Figure 1 ; Figure 4 Schematic diagram of the positioning module Figure 2 ; Figure 5 Schematic diagram of the positioning module Figure 3 ; Figure 6 Schematic diagram of the pressure component Figure 1 ; Figure 7 Schematic diagram of the pressure component Figure 2 ; Figure 8 Schematic diagram of the chair seat structure Figure 1 ; Figure 9 Schematic diagram of the chair seat structure Figure 2 ; Figure 10 for Figure 9 Enlarged view of point A in the middle; Figure 11 Schematic diagram of the structure of a sponge seat cushion Figure 1 ; Figure 12 Schematic diagram of the structure of a sponge seat cushion Figure 2 ; Figure 13 Schematic diagram of the intermediate plate Figure 1 ; Figure 14 Schematic diagram of the intermediate plate Figure 2 ; Figure 15 for Figure 14 Enlarged view at point B in the middle; Figure 16 This is a structural diagram of the pallet; Figure 17 This is a schematic diagram of the structure of the covering component.

[0017] Reference numerals: 1. Workbench; 2. Positioning mold; 21. First side wall; 22. Second side wall; 23. Third side wall; 24. Fourth side wall; 25. Receiving groove; 251. Bottom surface; 3. Pressing component; 31. First connecting pipe; 32. Second connecting pipe; 33. Third connecting pipe; 34. Fourth connecting pipe; 35. Fifth connecting pipe; 36. Connecting plate; 37. First cylinder; 38. First bracket; 4. Pull-out component; 41. Second cylinder; 42. Second bracket; 51. Sponge seat cushion; 511. First clearance groove; 512. First connecting hole; 513. Groove; 514. Curtain; 515. Seat surface; 516. First connecting surface; 517. Leg support area; 518. Hip support area; 52. Middle plate; 521. Support part; 522. Connecting part; 523. Positioning part; 5231. Positioning hole; 5232. Locking part; 524. Hook; 525. Second connecting hole; 526. First positioning surface; 527. Second positioning surface; 53. Support plate; 531. Reinforcing rib; 532. Third clearance groove; 533. Connecting seat; 534. Abutment part; 6. Covering part; 7. Strap. Implementation

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] The orientation described in the following embodiments is based on Figure 1 The directions shown are for reference. Figure 1 The position of the first cylinder is above, the position of the second cylinder is to the left, and the position of the worktable is below. Example

[0024] A method for assembling a chair seat, the method being applied to a chair seat assembly device, such as... Figure 1 and Figure 2 As shown, the assembly equipment includes a workbench 1, a positioning mold 2, a pressing component 3, and a pull-out component 4; the positioning mold 2 is fixed on the workbench 1, and a receiving groove 25 is provided on the top of the positioning mold 2; the pressing component 3 is arched, located above the positioning mold 2, and is mounted on the workbench 1 in a liftable manner, located above the receiving groove 25; the pull-out component 4 is slidably mounted on the workbench 1, and is located above the positioning mold 2; like Figures 8 to 14 As shown, the chair seat includes a sponge cushion 51, a middle plate 52, and a covering 6. The sponge cushion 51 includes a seat surface 515 and a first connecting surface 516 arranged opposite to each other. The middle plate 52 includes a first positioning surface 526 and a second positioning surface 527 arranged opposite to each other. A plurality of hook-shaped hooks 524 are provided on the second positioning surface 527. The plurality of hooks 524 are arranged along the edge of the middle plate 52. The projected area of ​​the first positioning surface 526 is smaller than the projected area of ​​the first connecting surface 516. A strap 7 is threaded through the edge of the covering 6. The two ends of the strap 7 extend from the covering 6. The steps for assembling the chair seat are as follows: Step 1), the covering part 6 is laid in the receiving groove 25 of the positioning mold 2, the middle plate 52 is installed on the sponge cushion 51, the seat surface 515 of the sponge cushion 51 is pressed down on the covering part 6, and then the sponge cushion 51 and the middle plate 52 are placed in the receiving groove 25. The four side walls of the receiving groove 25 push the covering part 6, so that the edges of the covering part 6 are raised upwards; wherein, the first positioning surface 526 of the middle plate 52 and the first connecting surface 516 of the sponge cushion 51 are arranged face to face; Step 2), the pressing part 3 moves downward and presses down on the left and right sides of the middle plate 52, causing the middle plate 52 and the sponge cushion 51 to deform under pressure; wherein, after the middle plate 52 is pressed, the left and right ends of the middle plate 52 bend downward and the middle part of the middle plate 52 arches upward; the left and right sides of the sponge cushion 51 become thinner under pressure, and the degree of deformation of the left and right sides of the sponge cushion 51 is greater than the degree of deformation of other parts. Step 3), the covering part 6 covers the edge of the middle plate 52, and the edge of the covering part 6 is inserted between the hook 524 and the second positioning surface 527; Step 4) Hook the end of the strap 7 onto the pull-out piece 4. The pull-out piece 4 slides to pull part of the strap 7 out of the covering piece 6, so that the edge of the covering piece 6 is tightened. The covering piece 6 tightly wraps the sponge cushion 51 and the middle plate 52 at one time. The pull-out piece 4 is located above the positioning mold 2, so that the strap 7 moves upward during the tightening process. When the strap 7 moves, it can drive the edge of the covering piece 6 to move upward and insert the edge of the covering piece 6 into the slot. (Step 5) After the strap 7 is tightened, the strap 7 is tied and fixed. Then the pressure piece 3 moves up, the sponge cushion 51 and the middle plate 52 are reset, and the covering piece 6 wraps the sponge cushion 51 and the middle plate 52 tightly for a second time. Then the assembled sponge cushion 51, middle plate 52 and covering piece 6 are taken out from the positioning mold 2.

[0025] The above method can quickly cover the sponge cushion 51 and the middle plate 52. The hook 524 on the middle plate 52 facilitates the positioning of the edge of the covering part 6, making the covering part 6 covering the sponge cushion 51 and the middle plate 52 more regular. On the other hand, after the pressure piece 3 releases the middle plate 52, during the process of the middle plate 52 and the sponge cushion 51 returning to their shape, the hook 524 can hook the edge of the covering part 6, preventing the edge of the covering part 6 from moving on the second positioning surface 527 of the middle plate 52 when the sponge cushion 51 and the middle plate 52 support the covering part 6, thus improving the production quality of the chair seat. In addition, during the above assembly process, the covering part 6 is tightened twice, so that the assembled chair seat can obtain a better support effect.

[0026] A chair seat, assembled using the above method, such as Figures 8 to 17 As shown, the chair seat includes the aforementioned sponge cushion 51, middle plate 52, covering, and straps; To improve the support effect of the chair seat, in the embodiment, such as Figure 11 As shown, the sponge cushion 51 includes a leg support area 517 for supporting the user's thighs and a hip support area 518 for supporting the hips. The leg support area 517 is located in front of the hip support area 518. A plurality of hemispherical grooves 513 are formed on the first connecting surface 516 of the sponge cushion 51. Some of the grooves 513 are set along the edge of the first connecting surface 516, some of the grooves 513 are set in the leg support area 517, and some of the grooves 513 divide the hip support area 518 into left and right parts.

[0027] With this design, the left, back, and right sides of the seat cushion typically do not contribute to supporting the user's body during use. Since some of the grooves 513 are located along the edge of the seat, when the user uses the seat, the leg support area 517 and the hip support area 518 deform under stress. This deformation pulls on the edge of the sponge cushion 51, causing it to bulge upwards, thus creating a stronger sense of support for the user's legs and hips. Because the leg support area 517 contains… The groove 513 is designed so that the support force of the leg support area 517 is less than that of the buttock support area 518, thus providing better support for the user. The last part of the groove 513 divides the buttock support area 518 into left and right parts. This allows the middle area of ​​the buttock support area 518 to rise upwards when the chair is in use. The chair deforms during use and matches the contour of the user's buttocks better. When the chair is not in use, the top surface of the sponge cushion 51 remains flat and smooth, and the contour of the user's buttocks will not be left on the sponge cushion 51.

[0028] Further preferred, such as Figures 8 to 11 The left and right ends of the sponge cushion 51 are curved upwards, while the middle part is concave downwards, making the sponge cushion 51 an inverted arch shape. This design allows users to obtain a better sense of support and improves the user experience of the chair.

[0029] In a further preferred embodiment, a curtain 514 protrudes from the first connecting surface 516 of the sponge cushion 51. The curtain 514 has a frame structure, and the middle plate 52 is located inside the curtain 514. The curtain 514 can cover the edge of the middle plate 52. This arrangement reduces friction between the covering 6 and the middle plate 52 and also hides the middle plate 52, thus improving the quality of the chair and making it more aesthetically pleasing. Furthermore, the covering 6 can pull the sponge cushion 51 downwards, ensuring that the position of the sponge cushion 51 does not easily shift, while also adjusting the support force of the seat surface 515 on the sponge cushion 51, and also serving to position it on the middle plate.

[0030] More preferably, such as Figure 11 and Figure 12As shown, the sponge cushion 51 has multiple first connecting holes 512, all of which are located in the buttock support area 518. The middle plate 52 has multiple second connecting holes 525. In step 1) above, the middle plate 52 and the sponge cushion 51 are installed as follows: the first positioning surface 526 of the middle plate 52 is pressed onto the first connecting surface 516 of the sponge cushion 51, the first connecting holes 512 of the sponge cushion 51 communicate with the second connecting holes 525 of the middle plate 52, and the pull rope passes through the first connecting holes 512 and the second connecting holes 525 and is then knotted and tied tightly, thereby installing the sponge cushion 51 and the middle plate 52 together. This arrangement further fixes the relative position of the buttock support area 518 and the middle plate 52, giving the buttock support area 518 a more direct support effect. Furthermore, the sponge cushion 51 has a first clearance groove 511, and the first connecting holes 512 are located in the first clearance groove 511, so the pull rope is also located in the first clearance groove 511. This design ensures that the user will not perceive the location of the pull cord during use, and also conceals the pull cord. Furthermore, there are three first connection holes 512, arranged sequentially from left to right.

[0031] In this embodiment, as Figure 8 , Figure 9 , Figure 10 , Figure 13 and Figure 14 As shown, the middle plate 52 includes a support portion 521, which has a frame structure. The inner side of the support portion 521 has a downwardly protruding connecting portion 522. The connecting portion 522 has an upward-opening second clearance groove 526, and a second connecting hole 525 is formed within the second clearance groove 526. The support portion 521 supports the sponge cushion 51, and the pull cord can pull a portion of the sponge located in the buttock support area 518 to abut against the bottom surface of the second clearance groove 526. This design provides greater support in the buttock support area 518 of the sponge cushion 51, while the sponge in other areas remains relatively soft, allowing the user to sit stably on the seat while further enhancing the seat's enveloping feel.

[0032] More preferably, the hook 524 is disposed on the side wall of the connecting part 522.

[0033] More preferably, the shape of the support portion 521 matches that of the first connecting surface 516.

[0034] In this embodiment, as Figure 8 , Figure 9 , Figure 10 and Figure 16As shown, the chair seat also includes a support plate 53, which is mounted on the second positioning surface 527 of the intermediate plate 52. The support plate 53 includes a mounting surface and a second connecting surface that are arranged opposite to each other. To facilitate the installation of the support plate 53, a plurality of positioning holes 5231 are provided on the limiting part of the intermediate plate 52. A plurality of locking parts 5232 protrude from the positioning holes 5231. A plurality of connecting seats 533 corresponding to the positioning holes 5231 protrude from the second connecting surface of the support plate 53. Positioning beads are fixedly installed on the connecting seats 533.

[0035] The installation process of the tray 53 is as follows: the multiple positioning beads and multiple positioning holes 5231 are aligned one by one, and then the positioning beads are moved up. The positioning beads push the locking part 5232, causing the locking part 5232 to tilt upward. The area between the multiple locking parts 5232 in the positioning hole 5231 gradually increases until the positioning pin passes through the multiple locking parts 5232. Then the multiple locking parts 5232 are reset and the positioning beads are locked.

[0036] This design allows for quick installation and removal of the tray 53. Furthermore, since both the middle plate 52 and the tray 53 are made of plastic, they possess a certain degree of toughness, ensuring that the strength of the chair seat is not affected even after multiple disassemblies.

[0037] Further preferred, such as Figure 16 As shown, the second connecting surface of the pallet 53 is provided with interlaced reinforcing ribs 531 to further increase the strength of the pallet 53.

[0038] Further preferred, such as Figures 13 to 16 As shown, the limiting part of the intermediate plate 52 has multiple positioning parts 523 protruding downwards, and multiple positioning holes 5231 correspond one-to-one with the multiple positioning parts 523. The positioning holes 5231 penetrate the positioning parts 523. The reinforcing ribs 531 of the support plate 53 are provided with multiple third clearance grooves 532. The positioning parts 523 are inserted into the third clearance grooves 532, and the reinforcing ribs 531 support the positioning parts 523.

[0039] Furthermore, the edge of the tray 53 is bent upward to form an abutment portion 534. When the tray 53 is installed on the intermediate plate 52, the abutment portion 534 of the tray 53 abuts against the bottom of the support portion 521 of the intermediate plate 52.

[0040] In this embodiment, as Figure 17 As shown, the covering 6 is made of fabric, mesh, etc.

[0041] A chair seat installation device, which installs the chair seat using the above-described installation method, such as... Figures 1 to 7 As shown, the equipment includes a worktable 1, a positioning mold 2, a pressing component 3, and a pull-out component 4.

[0042] In order to drive the pressing member 3 and the pulling member 4, in this embodiment, as follows: Figure 1 and Figure 2 As shown, a first bracket 38 is fixedly installed on the workbench 1, and a vertically arranged first cylinder 37 is installed on the first bracket 38. The pressing component 3 is located below the first cylinder 37, and the telescopic end of the first cylinder 37 is connected to the top of the pressing component 3. A second bracket 42 is also installed on the workbench 1, and a horizontally arranged second cylinder 41 is installed on the second bracket 42. The pull-out component 4 is connected to the telescopic end of the second cylinder 41.

[0043] In this embodiment, as Figures 3 to 5 As shown, the sidewalls of the receiving groove 25 include a first sidewall 21, a second sidewall 22, a third sidewall 23, and a fourth sidewall 24 connected sequentially. The first sidewall 21 and the third sidewall 23 are arranged front to back, while the second sidewall 22 and the fourth sidewall 24 are arranged left to right. The height of the first sidewall 21 and the third sidewall 23 is greater than the height of the second sidewall 22 and the fourth sidewall 24. This arrangement gives the receiving groove 25 a certain depth and effectively prevents the intermediate plate from shifting.

[0044] Further preferred, such as Figures 3 to 5 As shown, the front end of the bottom surface 251 of the accommodating groove 25 on the positioning mold is higher than the rear end, and the pull-out component is located above and in front of the positioning mold 2. With the front end of the sponge cushion 51 and the middle plate 52 installed in the positioning mold higher and the rear end lower, the rear part of the covering component can move forward more easily when the pull-out component is pulled out, thereby improving the covering effect and reducing the covering difficulty.

[0045] In a further preferred embodiment, the center of the bottom surface of the receiving groove 25 is raised upwards, while the left and right sides of the bottom surface of the receiving groove 25 are bent downwards. This design reduces the difficulty of pre-bending the middle plate, and the bending effect of the middle plate, while satisfying the pre-bending effect of the middle plate, also makes it easier for the covering component located between the sponge cushion and the bottom surface 251 to unfold.

[0046] In this embodiment, as Figure 6 and Figure 7 As shown, the pressure component 3 includes a first connecting pipe 31, a second connecting pipe 32, a third connecting pipe 33, and a fourth connecting pipe 34. These pipes are connected end-to-end to form a frame structure. The first and third connecting pipes 31 and 33 have identical structures and are positioned front-to-back. The second and fourth connecting pipes 32 and 34 are positioned left-to-right. The second and fourth connecting pipes 32 and 34 are straight pipes, while the first and third connecting pipes 31 and 33 are curved pipes. The second and fourth connecting pipes 32 and 34 are respectively pressed onto the left and right sides of the intermediate plate.

[0047] Furthermore, such as Figure 6 and Figure 7 As shown, the pressure component 3 also includes a fifth connecting pipe 35, which is arc-shaped. There are two fifth connecting pipes 35, arranged one after the other. The two ends of the fifth connecting pipe 35 are connected to the second connecting pipe 32 and the fourth connecting pipe 34, respectively. This arrangement allows the force from the first cylinder to be directly applied to the left and right sides of the intermediate plate through the fifth connecting pipe 35, the second connecting pipe 32, and the fourth connecting pipe 34.

[0048] Furthermore, such as Figure 6 and Figure 7 As shown, the pressure component 3 also includes a connecting plate 36, which is fixed on two fifth connecting pipes 35 and is connected to the telescopic end of the first cylinder.

[0049] In this embodiment, as Figure 1 and Figure 2 As shown, the pull-out component has serrated grooves. This allows the connection position between the strap and the pull-out component to be adjusted according to the length of the strap. In other embodiments, there are two pull-out components, two second cylinders, and two second brackets, arranged symmetrically on the left and right sides, with each pull-out component pulling one end of the strap.

[0050] 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.

[0051] 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 for assembling a chair seat, characterized in that: A chair assembly device is used, which includes a workbench (1), a positioning mold (2), a pressing component (3), and a pull-out component (4); the positioning mold (2) is fixed on the workbench (1), and a receiving groove (25) is provided on the top of the positioning mold (2); the pressing component (3) is arched, and the pressing component (3) is located above the positioning mold (2). The pressing component (3) is installed on the workbench (1) in a way that allows it to be lifted and lowered, and the pressing component (3) is located above the receiving groove (25); the pull-out component (4) is slidably installed on the workbench (1), and the pull-out component (4) is located above the front side of the positioning mold (2); The chair seat includes a sponge cushion (51), a middle plate (52), and a covering (6). The sponge cushion (51) includes a seat surface (515) and a first connecting surface (516) arranged opposite to each other. The middle plate (52) includes a first positioning surface (526) and a second positioning surface (527) arranged opposite to each other. The second positioning surface (527) is provided with a plurality of hook-shaped hooks (524), which are arranged along the edge of the middle plate (52). The edge of the covering (6) is provided with a strap (7), and the two ends of the strap (7) extend from the covering (6). The steps for assembling the chair seat are as follows: Step 1), place the covering part (6) in the receiving groove (25) of the positioning mold (2), install the middle plate (52) on the sponge cushion (51), press the seat surface (515) of the sponge cushion (51) downward on the covering part (6), and then place the sponge cushion (51) and the middle plate (52) in the receiving groove (25). The four side walls of the receiving groove (25) push the covering part (6) so that the edges of the covering part (6) around the perimeter are raised upward. Step 2), the pressure piece (3) moves downward and presses down on the left and right sides of the middle plate (52), so that the middle plate (52) and the sponge cushion (51) are deformed under pressure; Step 3), the covering (6) covers the edge of the middle plate (52), and the edge of the covering (6) is inserted between the hook (524) and the second positioning surface (527); Step 4), after hooking the end of the strap (7) onto the pull-out piece (4), the pull-out piece (4) moves and pulls out part of the strap (7) located in the cover piece (6). The strap (7) moves up and tightens the edge of the cover piece (6). The strap (7) tightens and drives the edge of the cover piece (6) to move up into the hook (524). Step 5), after the strap (7) is tightened, the strap (7) is tied and fixed, and then the pressure piece (3) moves up to take out the assembled sponge cushion (51), middle plate (52) and covering piece (6) from the positioning mold (2); The first connecting surface (516) of the sponge cushion (51) has a raised curtain (514), and the middle plate (52) is located inside the curtain (514), which can cover the edge of the middle plate (52).

2. The method for assembling a chair seat according to claim 1, characterized in that: The pressure component (3) is a frame structure.

3. The method for assembling a chair seat according to claim 1, characterized in that: The receiving groove (25) includes a first side wall (21), a second side wall (22), a third side wall (23) and a fourth side wall (24) connected end to end in sequence. The first side wall (21) and the third side wall (23) are arranged front to back, and the second side wall (22) and the fourth side wall (24) are arranged left to right. The height of the first side wall (21) and the height of the third side wall (23) are greater than the height of the second side wall (22) and the fourth side wall (24).

4. The method for assembling a chair seat according to claim 1, characterized in that: The receiving groove (25) includes an arched bottom surface (251).

5. The method for assembling a chair seat according to claim 1, characterized in that: The pull-out component (4) has a serrated groove, which is used to hook the strap (7).

6. The method for assembling a chair seat according to claim 1, characterized in that: There are two pull-out pieces (4), which are symmetrically arranged, and each pull-out piece (4) pulls the two ends of the strap (7).

7. The method for assembling a chair seat according to claim 1, characterized in that: The covering (6) is made of fabric.

8. The method for assembling a chair seat according to claim 1, characterized in that: The first connecting surface (516) of the sponge cushion (51) is provided with a plurality of grooves (513), wherein the plurality of grooves (513) are arranged along the edge of the first connecting surface (516).

9. The method for assembling a chair seat according to claim 8, characterized in that: The sponge cushion (51) includes a leg support area (517) and a hip support area (518). Multiple grooves (513) are provided in the leg support area (517), and the multiple grooves (513) divide the hip support area (518) into left and right parts.

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