A sofa cushion structure

Abstract

The application relates to a sofa cushion structure, which comprises a cushion framework and a flexible wrapping layer wrapped outside the cushion framework, the cushion framework comprises a framework frame, at least one transverse connecting rod fixed in the framework frame, and at least one longitudinal connecting rod fixed in the framework frame, and the transverse connecting rod and the longitudinal connecting rod are arranged in a cross mode; at least one set of connecting components is fixed on the cushion framework, and the connecting component comprises a fixing part fixed on the cushion framework and a mounting part used for being connected to a sofa framework and being detachably connected to the fixing part. The application can improve the ability of the flexible layer to maintain a suitable shape and improve the overall shape stability of the cushion.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of furniture, in particular to a sofa cushion structure. BACKGROUND

[0002] Currently, there are mainly two kinds of sofa cushions. The first kind is a detachable cushion independent of the sofa body, which is convenient to clean. The second kind is a cushion fixed on the sofa frame, which is stable in connection with the sofa frame and is not easy to slip off.

[0003] For the second kind of cushion, the conventional structure currently includes a seat frame, a flexible layer attached to the seat frame, and a cover wrapped outside the seat frame and the flexible layer. The seat frame is fixed to the sofa frame by bolts or other structures. This kind of cushion has the following problems: after a long time, the glue between the flexible layer and the seat frame is prone to failure, resulting in insufficient connection between the two, so that the flexible layer cannot maintain a proper shape in the cover, affecting the user's experience. For example, when the user's hips press the cushion and move backward, the flexible layer may be pushed to a corner of the cover, causing the cushion to deform severely. SUMMARY

[0004] In order to improve the ability of the flexible layer to maintain a proper shape, the present application provides a sofa cushion structure.

[0005] The sofa cushion structure provided by the present application adopts the following technical solution:

[0006] A sofa cushion structure includes a cushion skeleton and a flexible wrapping layer wrapped outside the cushion skeleton. The cushion skeleton includes a skeleton frame, at least one horizontal connecting rod fixed in the skeleton frame, and at least one vertical connecting rod fixed in the skeleton frame. The horizontal connecting rod and the vertical connecting rod are arranged in a cross shape. The cushion skeleton is fixed with at least one set of connecting components. The connecting components include a fixed part fixed to the cushion skeleton and a mounting part connected to the sofa frame and detachably connected to the fixed part.

[0007] By adopting the above technical solution, the flexible wrapping layer can be selected as a foaming layer. The cushion skeleton can be placed in a mold, and foaming material can be poured. After subsequent conventional steps such as creaming and post-ripening, a combination of the flexible wrapping layer tightly wrapped outside the cushion skeleton is finally produced. Since the cushion skeleton is provided with horizontal and vertical connecting rods, it can be tightly combined with the flexible wrapping layer, thereby greatly reducing the probability of separation between the flexible wrapping layer and the cushion skeleton, and enabling the cushion to maintain a basic shape. In addition, the cushion skeleton can be detachably connected to the sofa frame by the connecting components, so that the cushion can be easily cleaned.

[0008] Preferably, the cushion skeleton is arranged in a high position area, a low position area and a transition area, the distance between the cushion skeleton and the upper surface of the flexible wrapping layer in the high position area is a, the distance between the cushion skeleton and the upper surface of the flexible wrapping layer in the low position area is b, a<b, and the distance between the cushion skeleton and the upper surface of the flexible wrapping layer in the transition area is between a and b.

[0009] By adopting the technical scheme, the different heights of the cushion skeleton in the flexible wrapping layer can further reduce the probability of slippage and falling of the flexible wrapping layer relative to the cushion skeleton in the horizontal direction.

[0010] Preferably, the low position area is closer to the rear side of the cushion skeleton than the high position area, and the transition area is located between the high position area and the low position area.

[0011] By adopting the technical scheme, the user's normal sitting habit is met, and when the user leans against the backrest and moves the hips forward to push, that is, a forward frictional force is applied to the cushion, since the high position area is just located on the path of the low position area, the probability of slippage and falling of the flexible wrapping layer relative to the cushion skeleton in the horizontal backward direction can be effectively reduced.

[0012] Preferably, the flexible wrapping layer is provided with a plurality of sets of buffer assemblies, each buffer assembly comprising an upper abutting piece, a lower abutting piece, and an elastic piece arranged between the upper abutting piece and the lower abutting piece, wherein the lower end of the elastic piece is fixed to the lower abutting piece, and the upper end of the elastic piece is spaced apart from the upper abutting piece.

[0013] By adopting the technical scheme, when the user sits on the cushion, the process can be roughly divided into two stages, the first stage is that the upper abutting piece does not contact the elastic piece, and the user's sitting resistance is small and the softness is high, and the second stage is that the upper abutting piece starts to abut against the elastic piece, and the user's sitting resistance is large, which can provide effective support for users with large mass. In addition, after the cushion is used for a long time, the flexible wrapping layer will age and shrink, and the upper abutting piece will descend and contact the elastic piece. At this time, the elastic piece prevents the flexible wrapping layer from shrinking too much, thereby prolonging the service life of the cushion.

[0014] Preferably, the plurality of sets of buffer assemblies are arranged in a U shape, and the U-shaped opening faces the front side of the cushion skeleton.

[0015] By adopting the technical scheme, the contact range of human sitting can be met, that is, the buffer assembly can provide key support for the user's two thighs and hips, thereby reducing the probability of excessive compression of the flexible wrapping layer during normal use, and helping to prolong the service life of the flexible wrapping layer.

[0016] Preferably, the longitudinal connecting rods are arranged along the front-rear direction of the cushion framework, and the longitudinal connecting rod located at the middle of the width direction of the cushion framework is a middle connecting rod, and the part of the middle connecting rod close to the back side of the cushion framework is a concave section, and the concave section is arranged in a downward concave manner.

[0017] By adopting the above technical scheme, a high-flexibility area is intentionally formed, because the concave arrangement of the cushion framework at this position can increase the thickness of the flexible wrapping layer located above the cushion framework, so as to improve the softness of this area, which is suitable for small children with small sitting area and small weight.

[0018] Preferably, the longitudinal connecting rods located on both sides of the middle connecting rod are side connecting rods, and the part of the side connecting rod close to the back side of the cushion framework is a flat section, and the flat section is higher than the concave section.

[0019] By adopting the above technical scheme, a high-flexibility area is intentionally formed, because the concave arrangement of the cushion framework at this position can increase the thickness of the flexible wrapping layer located above the cushion framework, so as to improve the softness of this area, which is suitable for small children with small sitting area and small weight.

[0020] Preferably, the fixing member comprises a shell and an elastic limiting member, the shell is fixed on the cushion framework, and the elastic limiting member is formed with a limiting opening with variable spacing; the mounting member comprises a head portion with an outer diameter larger than the inner diameter of the limiting opening and a neck portion with an outer diameter smaller than the inner diameter of the limiting opening.

[0021] By adopting the above technical scheme, in the actual installation process, the head portion can be inserted into the limiting opening, and the limiting opening will be stretched until the head portion passes through the limiting opening and the neck portion is located in the limiting opening, thereby completing the connection between the mounting member and the fixing member.

[0022] Preferably, the fixing member comprises a shell and an elastic limiting member, the shell is fixed on the cushion framework, and the elastic limiting member is formed with a limiting opening with variable spacing; the mounting member comprises a head portion with an outer diameter larger than the inner diameter of the limiting opening and a neck portion with an outer diameter smaller than the inner diameter of the limiting opening.

[0023] By adopting the above technical scheme, in the actual installation process, the head portion can be inserted into the limiting opening, and the limiting opening will be stretched until the head portion passes through the limiting opening and the neck portion is located in the limiting opening, thereby completing the connection between the mounting member and the fixing member.

[0024] Preferably, the fixing member comprises a U-shaped connecting portion, and the U-shaped connecting portion is formed with a clamping gap; the mounting member comprises a shell and two oppositely arranged limiting members elastically connected in the shell, and the connecting gap is formed between the two limiting members.

[0025] By adopting the above technical scheme, in the actual installation process, the U-shaped connecting portion can be inserted into the shell and pass through the connecting gap, and at this time, the two limiting members are located in the clamping gap, thereby realizing the connection between the U-shaped connecting member and the mounting member.

[0026] In summary, the sofa cushion structure of the present application has at least one of the following beneficial technical effects: since the flexible wrapping layer is wrapped outside the cushion framework, and the longitudinal and transverse intersecting connecting rods are arranged in the cushion framework, the flexible wrapping layer can be closely combined with the cushion framework, greatly reducing the probability of separation of the flexible wrapping layer and the cushion framework, so that the cushion can maintain a basic form and improve the overall form stability of the cushion. In addition, the cushion framework can be detachably connected to the sofa frame by the connecting assembly, so that the cushion can be conveniently cleaned. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic diagram of embodiment 1 of the present application;

[0028] Figure 2 is a schematic diagram of the cushion framework in embodiment 1 of the present application;

[0029] Figure 3 is a top view of the cushion framework in embodiment 1 of the present application, showing the positional relationship between the cushion framework and the buffer assembly; Figure 1

[0030] Figure 4 is a sectional connection relationship schematic diagram of the buffer assembly and the flexible wrapping layer in embodiment 1 of the present application; Figure 2

[0031] Figure 5 is an exploded structure schematic diagram of the connecting assembly in embodiment 1 of the present application; Figure 1

[0032] Figure 6 is a structural schematic diagram of the cushion framework in embodiment 2 of the present application;

[0033] Figure 7 is a sectional connection relationship schematic diagram of the connecting assembly in embodiment 2 of the present application. Figure 5

[0034] BRIEF DESCRIPTION OF DRAWINGS: 1, cushion framework; 11, high position area; 12, transition area; 13, low position area; 14, framework frame; 15, transverse connecting rod; 16, intermediate connecting rod; 161, lower concave section; 17, side connecting rod; 171, flat section; 18, additional connecting rod; 19, hook piece; 2, flexible wrapping layer; 3, connecting assembly; 4, fixing piece; 41, shell; 411, flange; 412, insertion window; 413, round hole; 414, waist-shaped hole; 42, elastic limiting piece; 421, limiting port; 43, U-shaped connecting part; 44, extension rod; 5, mounting piece; 51, head; 52, neck; 53, body; 54, casing; 55, limiting piece; 56, connecting gap; 6, buffer assembly; 61, upper abutting piece; 62, lower abutting piece; 63, elastic piece; 64, cloth cover. DETAILED DESCRIPTION

[0035] The following will be described in detail with reference to the accompanying drawings. Figures 1-7 ​​​​The application is further described in detail.

[0036] The application discloses a sofa cushion structure.

[0037] Embodiment 1

[0038] Reference Figure 1 And Figure 2 The sofa cushion structure comprises a cushion framework 1 and a flexible wrapping layer 2 wrapped outside the cushion framework 1. The flexible wrapping layer 2 can be foamed material. The cushion framework 1 can be placed in a mold, and foamed material is poured. After subsequent steps such as milky white and post-ripening, the final combination of the flexible wrapping layer 2 tightly wrapped outside the cushion framework 1 is obtained. Therefore, the flexible wrapping layer 2 in the scheme can be closely connected outside the cushion framework 1, reducing the probability of separation of the flexible wrapping layer 2 and the cushion framework 1, so that the cushion can maintain the basic form for a longer service life. Two groups of connecting components 3 are fixed on the cushion framework 1. The connecting components 3 are used to realize detachable connection of the cushion to the sofa frame. The connecting components 3 comprise a fixing part 4 fixed to the cushion framework 1 and a mounting part 5 used to be connected to the sofa frame and detachably connected to the fixing part 4. The fixing part 4 cannot be completely wrapped by the flexible wrapping layer 2.

[0039] The cushion framework 1 is not in the same plane, but has a certain height difference. The cushion framework 1 is divided into a high-position area 11, a low-position area 13 and a transition area 12 according to regions. The distance between the cushion framework 1 in the high-position area 11 and the upper surface of the flexible wrapping layer 2 is a, the distance between the cushion framework 1 in the low-position area 13 and the upper surface of the flexible wrapping layer 2 is b, a < b, that is, the cushion framework 1 in the high-position area 11 is higher than the cushion framework 1 in the low-position area 13, so the cushion elasticity at the high-position area 11 is better than that at the low-position area 13. The distance between the cushion framework 1 in the transition area 12 and the upper surface of the flexible wrapping layer 2 is between a and b, and the cushion framework 1 in the transition area 12 is arranged in an inclined manner. The high-position area 11, the transition area 12 and the low-position area 13 are arranged in sequence along the front-rear direction of the cushion framework 1, and the high-position area 11 is located at the most front side of the cushion framework 1.

[0040] Therefore, through the above setting, the probability of slippage and falling of the flexible wrapping layer 2 relative to the cushion framework 1 in the horizontal direction can be further reduced. In addition, each position area can provide users with different softness and hardness of the riding area to meet the needs of different customers.

[0041] The cushion framework 1 comprises a framework frame 14, a transverse connecting rod 15 fixed in the framework frame 14, and five longitudinal connecting rods fixed in the framework frame 14. The transverse connecting rod 15 and the longitudinal connecting rods are arranged in a cross manner. The longitudinal connecting rods are arranged along the front-rear direction of the cushion framework 1. The longitudinal connecting rod located in the middle of the width direction of the cushion framework 1 is an intermediate connecting rod 16. The longitudinal connecting rods located on the left and right sides of the intermediate connecting rod 16 are side connecting rods 17. The longitudinal connecting rods located on the outer sides of the side connecting rods 17 are additional connecting rods 18.

[0042] The two ends of the intermediate connecting rod 16 are welded to the front side and the rear side of the framework frame 14, and the intermediate connecting rod 16 crosses the transverse connecting rod 15 and does not abut against the transverse connecting rod 15. The part of the intermediate connecting rod 16 close to the rear side of the cushion framework 1 is a concave section 161. The concave section 161 is located in the low position area 13 and is arranged in a downwardly concave manner to form a small-range high-flexibility area suitable for small children with small sitting area and small weight.

[0043] The two ends of the side connecting rod 17 are welded to the front side of the framework frame 14 and the transverse connecting rod 15. The part of the side connecting rod 17 close to the rear side of the cushion framework 1 is a flat section 171. The flat section 171 is located in the low position area 13 and is flush with the framework frame 14 in the low position area 13 but higher than the concave section 161. Therefore, a region with slightly poor flexibility and strong support is formed around the high-flexibility area above the concave section 161. This region is suitable for adults with larger sitting area and larger weight.

[0044] The two ends of the additional connecting rod 18 are welded to the front side of the framework frame 14 and the transverse connecting rod 15. The additional connecting rod 18 is used to further improve the shape stability of the cushion.

[0045] The left and right ends of the front side of the framework frame 14 are provided with upwardly curved hook members 19. The upper ends of the hook members 19 can be selected to pass through the flexible wrapping layer 2 and are used to be hung on the sofa frame to realize the connection of the cushion and the sofa frame together with the connecting assembly 3.

[0046] Referring to Figure 3 and Figure 4 , the flexible wrapping layer 2 is provided with a plurality of sets of buffer assemblies 6. The buffer assembly 6 comprises an upper abutting member 61, a lower abutting member 62, and an elastic member 63 arranged between the upper abutting member 61 and the lower abutting member 62. The elastic member 63 can be a spring and is wrapped with a cloth cover 64 to prevent the foaming layer from entering the spring gap during extrusion. The lower end of the elastic member 63 is fixed on the lower abutting member 62, and the upper end of the elastic member 63 is kept with a gap from the upper abutting member 61.

[0047] It is worth mentioning that when the user sits on the cushion, it can be roughly divided into two stages, the first stage is that the upper abutting piece 61 does not contact the elastic piece 63, so the resistance of the user sitting down is small and the softness is high, and the second stage is that the upper abutting piece 61 begins to abut against the elastic piece 63, so the resistance of the user sitting down is large, which can provide effective support for users with large mass, so the above setting can provide segmented support; in addition, when the cushion is used for a long time, the flexible wrapping layer 2 will age and shrink, so the upper abutting piece 61 will descend and contact the elastic piece 63, at this time the function of the elastic piece 63 is to resist the upper abutting piece 61, prevent the flexible wrapping layer 2 from over-shrinking, so that the cushion can maintain a long service life;

[0048] The plurality of buffer assemblies 6 are arranged in a U shape, and the U-shaped opening faces the front side of the cushion framework 1, so as to exactly match the contact range of human sitting, that is, the buffer assembly 6 can play a key supporting role on the user's two thighs and hips, thereby reducing the probability of the flexible wrapping layer 2 being excessively pressed during normal use, which helps to prolong the service life of the flexible wrapping layer 2; it should be noted that the arrangement mode of the buffer assembly 6 is not limited to the U shape, and can also be a rectangular shape or the like.

[0049] Reference Figure 5 The fixing piece 4 includes a shell 41 and an elastic limiting piece 42, the shell 41 is fixed on the cushion framework 1 (see Figure 1 The shell 41 is a plate-shaped metal sheet, four corners thereof are provided with four downwardly bent flanges 411, and a through window 412 is formed in the middle portion thereof, two opposite flanges 411 are symmetrically provided with a through hole group, the through hole group includes a circular hole 413 and a waist-shaped hole 414; the elastic limiting piece 42 is a steel wire strip, which is bent into a "J" shape, one end of the steel wire strip sequentially passes through the two waist-shaped holes 414, and the other end only passes through the first circular hole 413, and finally a spacing variable limiting opening 421 is formed between the two sections of the elastic limiting piece 42, and the through window 412 is located above the limiting opening 421;

[0050] The mounting piece 5 is a metal sheet, which sequentially includes a head portion 51, a neck portion 52 and a body portion 53, the outer diameter of the head portion 51 is greater than the inner diameter of the limiting opening 421, the outer diameter of the neck portion 52 is less than the inner diameter of the limiting opening 421, and the outer diameter of the body portion 53 is greater than the inner diameter of the limiting opening 421, wherein the body portion 53 is used to be fixed on the sofa frame; the head portion 51 can pass through the through window 412 and the limiting opening 421 from top to bottom, and the neck portion 52 is clamped at the limiting opening 421, wherein when the head portion 51 passes through the limiting opening 421, the inner diameter of the limiting opening 421 is expanded, that is, one section of the steel wire strip is bent outward, and when the head portion 51 completely passes through the limiting opening 421, the inner diameter of the limiting opening 421 returns to the original state;

[0051] The mounting mode of the cushion and the sofa frame is that the cushion with the fixing piece 4 is mounted on the mounting piece 5 of the sofa frame from bottom to top.

[0052] The implementation principle of the embodiment 1 is that in the scheme, the flexible wrapping layer 2 can be selected as a foaming layer and wrapped outside the cushion framework 1, and because the longitudinal and transverse intersecting connecting rods are arranged in the cushion framework 1, the flexible wrapping layer 2 can be tightly combined with the flexible wrapping layer 2, so that the probability of separation of the flexible wrapping layer 2 from the cushion framework 1 is greatly reduced, and the cushion can maintain a basic form; in addition, the cushion framework 1 can be detachably connected to the sofa frame by the connecting assembly 3, so that the cushion can be conveniently cleaned.

[0053] Embodiment 2

[0054] The difference between the embodiment and the embodiment 1 is that the structures of the fixing member 4 and the mounting member 5 are exchanged, that is, the shell 41 is used for being fixed to the sofa frame, and the body 53 is used for being welded to the cushion framework 1.

[0055] Embodiment 3

[0056] Reference Figure 6 and Figure 7 The difference between the embodiment and the embodiment 1 is that the connecting assembly 3 is different, specifically, the fixing member 4 includes a U-shaped connecting portion 43 and extension rods 44 fixed at two ends of the U-shaped connecting portion 43, the extension rods 44 are welded to the cushion framework 1, the U-shaped connecting portion 43 cooperates with the mounting member 5, and a clamping gap is formed in the U-shaped connecting portion 43.

[0057] The mounting member 5 includes a casing 54 and two oppositely arranged limiting members 55 elastically connected in the casing 54, and a connecting gap 56 is formed between the two limiting members 55; the U-shaped connecting portion 43 can be inserted into the casing 54 from top to bottom and pass through the connecting gap 56 until the limiting members 55 are located in the clamping gap, at this time, the limiting members 55 have an anti-extraction effect on the U-shaped connecting portion 43, so that the connection between the mounting member 5 and the fixing member 4 is realized; when the user pulls the U-shaped connecting portion 43 outward, the U-shaped connecting portion 43 can be pulled out of the limiting members 55.

[0058] The mounting manner of the cushion and the sofa frame is that the cushion with the fixing member 4 is mounted to the mounting member 5 of the sofa frame from top to bottom.

[0059] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made on the basis of the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A sofa cushion structure, characterized in that: It includes a seat cushion skeleton (1) and a flexible wrapping layer (2) wrapped outside the seat cushion skeleton (1). The seat cushion skeleton (1) includes a skeleton frame (14), at least one transverse connecting rod (15) fixed inside the skeleton frame (14), and at least one longitudinal connecting rod fixed inside the skeleton frame (14). The transverse connecting rod (15) and the longitudinal connecting rod are arranged in a cross pattern; at least one set of connecting components (3) is fixed on the seat cushion skeleton (1). The connecting components (3) are used to detachably connect the seat cushion to the sofa frame. The connecting components (3) include a fixing part (4) fixed on the seat cushion skeleton (1) and a mounting part (5) for connecting to the sofa frame and detachably connecting to the fixing part (4).

2. The sofa cushion structure according to claim 1, characterized in that: It includes a high position area (11), a low position area (13) and a transition area (12). The distance between the seat cushion skeleton (1) in the high position area (11) and the upper surface of the flexible wrapping layer (2) is a, and the distance between the seat cushion skeleton (1) in the low position area (13) and the upper surface of the flexible wrapping layer (2) is b. a < b, and the distance between the seat cushion skeleton (1) in the transition area (12) and the upper surface of the flexible wrapping layer (2) is between a and b.

3. The sofa cushion structure according to claim 2, characterized in that: The low position area (13) is closer to the rear side of the seat cushion skeleton (1) than the high position area (11), and the transition area (12) is located between the high position area (11) and the low position area (13).

4. The sofa cushion structure according to claim 1, characterized in that: Multiple sets of buffer components (6) are provided inside the flexible wrapping layer (2). The buffer components (6) include an upper abutting part (61), a lower abutting part (62), and an elastic part (63) provided between the upper abutting part (61) and the lower abutting part (62). The lower end of the elastic part (63) is fixed on the lower abutting part (62), and there is a gap between the upper end of the elastic part (63) and the upper abutting part (61).

5. A sofa cushion structure according to claim 4, characterized in that: Multiple sets of the buffer components (6) are arranged in a U shape, and the U-shaped opening faces the front side of the seat cushion skeleton (1).

6. The sofa cushion structure according to claim 1, characterized in that: The longitudinal connecting rod is arranged along the front-back direction of the seat cushion skeleton (1). The longitudinal connecting rod located in the middle of the width direction of the seat cushion skeleton (1) is the middle connecting rod (16). The part of the middle connecting rod (16) close to the rear side of the seat cushion skeleton (1) is a concave section (161), and the concave section (161) is arranged to be concave downward.

7. A sofa cushion structure according to claim 6, characterized in that: The longitudinal connecting rods on both sides of the middle connecting rod (l6) are side connecting rods (17). The part of the side connecting rod (17) close to the rear side of the seat cushion skeleton (1) is a flat section (171), and the flat section (171) is higher than the concave section (161).

8. The sofa cushion structure according to claim 1, characterized in that: The fixing part (4) includes a shell (41) and an elastic limiting part (42). The shell (41) is fixed on the seat cushion skeleton (1). A limit opening (421) with deformable spacing is formed inside the elastic limiting part (42); the mounting part (5) includes a head (51) with an outer diameter larger than the inner diameter of the limit opening (421) and a neck (52) with an outer diameter smaller than the inner diameter of the limit opening (421).

9. A sofa cushion structure according to claim 8, characterized in that: The housing (41) has a through window (412). The mounting component (5) includes a head (51), a neck (52), and a body (53). The outer diameter of the head (51) is larger than the inner diameter of the limiting port (421), the outer diameter of the neck (52) is smaller than the inner diameter of the limiting port (421), and the outer diameter of the body (53) is larger than the inner diameter of the limiting port (421). The body (53) is used to fix it to the sofa frame. The head (51) is configured to pass through the insertion window (412) and the limiting port (421) from top to bottom until the neck (52) is engaged at the limiting port (421); the fastener (4) and the mounting member (5) are configured such that when the head (51) passes through the limiting port (421), the inner diameter of the limiting port (421) is expanded, and when the head (51) has completely passed through the limiting port (421), the inner diameter of the limiting port (421) is restored.

10. A sofa cushion structure according to claim 1, characterized in that: The fastener (4) includes a U-shaped connecting part (43) with a snap-fit ​​gap formed inside the U-shaped connecting part (43); the mounting part (5) includes a housing (54) and two opposing limiting parts (55) elastically connected inside the housing (54) with a connecting gap (56) formed between the two limiting parts (55).

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