Foaming backrest for office chair

Abstract

The utility model provides a foaming backrest for an office chair, which comprises a backrest plate, a foaming bushing and a support component, and the foaming bushing is fixedly connected with the surface of the backrest plate. According to the foaming backrest for the office chair, when a user uses the foaming backrest, the back of the user extrudes the foaming lining, then the supporting plate is stressed, the sliding blocks at the two ends of the supporting plate slide in the sliding grooves, the connecting cover is pressed down immediately, the matched spring is extruded, meanwhile, the connecting cover moves downwards, and the foaming lining is pressed down. A matching block on one inner side extrudes a connecting block at one end of a linkage block, the linkage block moves in a matching column, a connecting block at the other end of the linkage block moves along a matching block on the other side of a connecting cover, then the matching column is driven to move in a groove, and a matching spring is synchronously extruded, so that the supporting plate is stressed to move downwards; and a spring is matched for rapid compaction, so that the back of a user is effectively prevented from being subjected to too hard or too soft supporting force, and the comfort of the user is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of office chair technology, and in particular to a foam backrest for office chairs. Background Technology

[0002] Sofas and office chairs all have backrest structures. Current technology generally uses thick solid wood boards or composite solid wood boards for backrest structures. However, these boards are heavy and inconvenient to install and use, and their seating comfort is also limited. At the same time, they also greatly increase the production cost, thus limiting their applicability and practicality.

[0003] For example, the Chinese patent document "A Foam Backrest for an Office Chair" (publication number CN221410833U) discloses a backrest board and a foam liner fixed to the backrest board. The foam liner includes a connecting bottom layer, a foam substrate fixed to the connecting bottom layer, and a surface layer disposed on the foam substrate. A support frame is fixed inside the foam substrate. A snap-fit ​​groove is provided on the upper side of the backrest board. A snap-fit ​​protrusion that mates with the snap-fit ​​groove is fixed on the top of the support frame. The snap-fit ​​protrusion of the support frame is positioned by engaging with the snap-fit ​​groove. The foam substrate is foamed and fixed to the support frame. By setting a foam liner on the backrest board and cooperating with the support frame, the stability of the foam support board can be ensured, and it is not easy to collapse. This helps to reduce processing costs and also reduces the thickness of the backrest board, improving the convenience of installation and use.

[0004] In summary, when using a foam backrest, the support frame ensures the stability of the foam support board and prevents it from collapsing. However, this also reduces the user's comfort during use, as the back support is too firm. Utility Model Content

[0005] Therefore, it is necessary to provide a foam backrest for office chairs to address the technical problems raised in the background section.

[0006] A foam backrest for an office chair includes: a backrest panel, a foam bushing, and a support assembly. The foam bushing is fixedly connected to the surface of the backrest panel. The support assembly is disposed between the foam bushing and the backrest panel. The support assembly includes mating columns and a support plate. The support plate is arc-shaped, and one side of the support plate is in contact with the inner side of the foam bushing. Grooves are formed on both sides of the middle of the upper surface of the backrest panel. A linkage shell is fixedly connected to the periphery of the groove. Two sets of mating columns are provided, each set being disposed in one of the two sets of grooves and slidingly engaging with the grooves. A mating spring is fixedly connected to the top of each mating column. A connecting cover is fixedly connected to one end of each mating spring. The bottom end of the connecting cover is disposed within the linkage shell and slidingly engages with the linkage shell. The top end of the connecting cover is fixedly connected to the inner side of the support plate.

[0007] In one embodiment, the mating column has an inclined groove inside, and mating grooves are formed on both sides of the mating column. The mating grooves are connected to the inclined grooves. A linkage block is slidably connected inside the inclined groove. Connecting blocks are fixedly connected to both ends of the linkage block. The two sets of connecting blocks are set in opposite directions, and the two sets of connecting blocks are adapted to the two sets of mating grooves respectively.

[0008] In one embodiment, mating blocks are fixedly connected to both sides of the inner surface of the connecting cover. The two sets of mating blocks are arranged in opposite directions. The mating blocks are arranged on one side of the connecting block. Both the mating blocks and the connecting block are protrusions with one side inclined. The inclined surface of the mating block is adapted to the inclined surface of the connecting block.

[0009] In one embodiment, the surface of the foamed bushing is provided with flame-retardant fabric.

[0010] In one embodiment, the foamed bushing is provided with a plurality of vent holes.

[0011] In one embodiment, grooves are provided on both sides of the upper surface of the backrest plate. The grooves are located inside the foam bushing. Slider blocks are fixedly connected to both ends of the support plate. The sliders are located in the grooves and slide in cooperation with the grooves.

[0012] In one embodiment, the support plate is an arc-shaped stainless steel sheet with a thickness of 0.3-1.1 mm.

[0013] In one embodiment, a flame-retardant layer and a waterproof layer are provided between the backrest panel and the foamed bushing; the flame-retardant layer and the waterproof layer are flame-retardant adhesive and waterproof adhesive, respectively, which helps to improve the fire-retardant performance and moisture-proof performance of the backrest panel.

[0014] In one embodiment, the spring is made of high-carbon steel.

[0015] In one embodiment, the thickness of the backrest panel is 3-5.5 mm.

[0016] During use, the foam backrest of the aforementioned office chair features a foam liner on the backrest panel. The inner side of the foam liner has a support component. When the user uses the chair, their back presses against the foam liner, causing the support plate to bear force. This causes the sliders at both ends to slide within the grooves, pressing down on the connecting cover and compressing the engaging spring. Simultaneously, the connecting cover moves downwards, causing a mating block on one side of its interior to press against a connecting block at one end of the linkage block. This causes the linkage block to move within the mating column, while the connecting block at the other end moves along the mating block on the other side of the connecting cover. This, in turn, moves the mating column within the groove, simultaneously compressing the engaging spring. This design ensures that the support plate is compressed downwards while the engaging spring is quickly compacted, effectively preventing the user's back from receiving excessively hard or soft support, thus greatly improving user comfort. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the foam backrest for the office chair according to this utility model;

[0018] Figure 2 This is a front view of the foamed backrest structure for office chairs according to this utility model;

[0019] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the middle AA section;

[0020] Figure 4 for Figure 2 Partial schematic diagram of the cross-sectional structure of BB. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model.

[0022] 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 at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] Please refer to the following: Figures 1 to 4This utility model provides a foam backrest for an office chair, comprising: a backrest panel 1, a foamed bushing 2, and a support assembly 3. The foamed bushing 2 is fixedly connected to the surface of the backrest panel 1. The support assembly 3 is disposed between the foamed bushing 2 and the backrest panel 1. The support assembly 3 includes a mating post 31 and a support plate 301. The support plate 301 is arc-shaped, and one side of the support plate 301 is in contact with the inner side of the foamed bushing 2. Grooves 103 are provided on both sides of the middle part of the upper surface of the backrest panel 1. A linkage shell 101 is fixedly connected to the periphery of the support plate 301. Two sets of mating columns 31 are provided, and the two sets of mating columns 31 are respectively set in two sets of grooves 103 and slide in the grooves 103. A mating spring 305 is fixedly connected to the top of the mating column 31. A connecting cover 306 is fixedly connected to one end of the mating spring 305. The bottom end of the connecting cover 306 is set in the linkage shell 101 and slides in the linkage shell 101. The top end of the connecting cover 306 is fixedly connected to the inner side of the support plate 301.

[0027] Preferably, the mating column 31 has an inclined groove inside, and both sides of the mating column 31 have mating grooves 304. The mating grooves 304 are connected to the inclined grooves. A linkage block 303 is slidably connected inside the inclined grooves. Connecting blocks 308 are fixedly connected to both ends of the linkage block 303. The two sets of connecting blocks 308 are set in opposite directions, and the two sets of connecting blocks 308 are respectively adapted to the two sets of mating grooves 304.

[0028] Preferably, mating blocks 307 are fixedly connected to both sides of the inner surface of the connecting cover 306. The two sets of mating blocks 307 are set in opposite directions. The mating blocks 307 are set on one side of the connecting block 308. Both the mating blocks 307 and the connecting block 308 are protrusions with one side inclined. The inclined surface of the mating block 307 is adapted to the inclined surface of the connecting block 308.

[0029] Preferably, the surface of the foamed bushing 2 is provided with flame-retardant cloth 202.

[0030] Preferably, the foamed bushing 2 is provided with a plurality of vent holes 201.

[0031] Preferably, the upper surface of the backrest 1 has grooves 102 on both sides, the grooves 102 are located inside the foam bushing 2, and the two ends of the support plate 301 are fixedly connected to sliders 302, the sliders 302 are located in the grooves 102 and slide in cooperation with the grooves 102.

[0032] Preferably, the support plate 301 is an arc-shaped stainless steel sheet with a thickness of 0.3-1.1 mm.

[0033] Preferably, a flame-retardant layer and a waterproof layer are provided between the backrest panel 1 and the foamed bushing 2; the flame-retardant layer and the waterproof layer are flame-retardant adhesive and waterproof adhesive, respectively, which helps to improve the fire-retardant performance and moisture-proof performance of the backrest panel.

[0034] Preferably, the spring 305 is made of high-carbon steel.

[0035] Preferably, the thickness of the backrest panel 1 is 3-5.5 mm.

[0036] This utility model provides a foam backrest for an office chair. A foamed bushing 2 is provided on the backrest panel 1, and a support component 3 is provided on the inner side of the foamed bushing 2. When the user uses the chair, their back presses against the foamed bushing 2, which in turn forces the support plate 301, causing the sliders 302 at both ends to slide within the groove 102. The support plate 301 then presses down on the connecting cover 306, thereby compressing the engaging spring 305. Simultaneously, the connecting cover 306 moves downward, causing the engaging block 307 on one side of its interior to press against the connecting block 308 at one end of the linkage block 303. This causes the linkage block 303 to move within the engaging post 31. The connecting block 308 at the other end of the linkage block 303 moves along the engaging block 307 on the other side of the connecting cover 306, thereby driving the engaging post 31 to move within the groove 103, simultaneously acting on the engaging spring 305. 5. Extrusion is applied to the support plate 301, causing it to move downwards under pressure, while simultaneously compacting the mating spring 305. This effectively prevents the support force on the user's back from being too hard or too soft, greatly improving the user's comfort. When not in use, the support plate 301 is not under pressure. Under the action of the mating spring 305, the connecting cover 306 moves upwards, causing the mating block 307 on the other side of the connecting cover 306 to press the connecting block 308 at the other end of the linkage block 303. This causes the linkage block 303 to move within the mating column 31. The connecting block 308 at one end of the linkage block 303 moves along the mating block 307 on one side of the connecting cover 306, thereby causing the mating column 31 to move within the groove 103. This allows the mating spring 305 to recover its deformation, thus restoring the support plate 301 to its original support and preventing the foam bushing 2 from collapsing.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A foam backrest for an office chair, characterized in that, include: The backrest panel, foam bushing, and support assembly are provided. The foam bushing is fixedly connected to the surface of the backrest panel. The support assembly is disposed between the foam bushing and the backrest panel. The support assembly includes mating columns and a support plate. The support plate is arc-shaped, and one side of the support plate is in contact with the inner side of the foam bushing. Grooves are formed on both sides of the middle of the upper surface of the backrest panel. A linkage shell is fixedly connected to the periphery of the groove. Two sets of mating columns are provided, each set being disposed in one of the two sets of grooves and slidingly engaging with the grooves. A mating spring is fixedly connected to the top of each mating column. A connecting cover is fixedly connected to one end of each mating spring. The bottom end of the connecting cover is disposed within the linkage shell and slidingly engages with the linkage shell. The top end of the connecting cover is fixedly connected to the inner side of the support plate.

2. The foam backrest for office chairs according to claim 1, characterized in that, The mating column has an inclined groove inside, and mating grooves are formed on both sides of the mating column. The mating grooves are connected to the inclined grooves. A linkage block is slidably connected inside the inclined groove. Connecting blocks are fixedly connected to both ends of the linkage block. The two sets of connecting blocks are set in opposite directions, and the two sets of connecting blocks are adapted to the two sets of mating grooves respectively.

3. The foam backrest for office chairs according to claim 2, characterized in that, Both sides of the inner surface of the connecting cover are fixedly connected with mating blocks. The two sets of mating blocks are set in opposite directions. The mating blocks are set on one side of the connecting block. Both the mating blocks and the connecting block are protrusions with one side inclined. The inclined surface of the mating block is adapted to the inclined surface of the connecting block.

4. The foam backrest for office chairs according to claim 3, characterized in that, The surface of the foamed bushing is covered with flame-retardant fabric.

5. The foam backrest for office chairs according to claim 4, characterized in that, The foamed bushing has several ventilation holes.

6. The foam backrest for office chairs according to claim 5, characterized in that, The upper surface of the backrest plate has grooves on both sides, and the grooves are located inside the foam bushing. Both ends of the support plate are fixedly connected to sliders, which are located in the grooves and slide in cooperation with the grooves.

7. The foam backrest for office chairs according to claim 6, characterized in that, The support plate is an arc-shaped stainless steel sheet with a thickness of 0.3-1.1 mm.

8. The foam backrest for office chairs according to claim 7, characterized in that, A flame-retardant layer and a waterproof layer are provided between the back panel and the foam bushing.

9. The foam backrest for an office chair according to claim 8, characterized in that, The spring is made of high-carbon steel.

10. The foam backrest for an office chair according to claim 9, characterized in that, The thickness of the backrest panel is 3-5.5mm.

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