Modular seating backrest

Abstract

This application discloses a modular seating backrest, including a back cushion unit and a lumbar cushion unit. The bottom of the back cushion unit has a stepped transition, and the back cushion unit includes a downwardly extending splicing portion, with a splicing groove formed at an inwardly recessed position relative to the splicing portion. The top of the lumbar cushion unit also has a stepped transition, and the lumbar cushion unit includes an upwardly extending mounting portion, with a mounting groove formed at an inwardly recessed position relative to the mounting portion. When the back cushion unit and the lumbar cushion unit are combined, the splicing portion fills the mounting groove, and the mounting portion fills the splicing groove. The splicing portion and the mounting portion are connected front to back, and are detachably connected by a quick-release structure. The modular seating backrest provided by this application, by setting the bottom of the back cushion unit and the top of the lumbar cushion unit as a stepped structure, not only makes the two fit more tightly and has higher connection strength, but also has a simple structure and low processing and manufacturing costs; furthermore, after packaging, the splicing portion and the mounting portion will not protrude outwards, ensuring packaging quality.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to modular seating backrests. Background Technology

[0002] Modular production is a common manufacturing method for seating furniture. Manufacturing the backrest, base, and seat separately not only improves production efficiency but also saves packaging space and reduces transportation costs, as the three parts can be transported separately. However, the backrest occupies more vertical space than the seat and base, requiring longer boxes for packing. Larger packing volumes result in larger space requirements, indicating room for optimization in packaging space.

[0003] To address the aforementioned issues, the inventors aim to provide a modular backrest that consists of two interconnected backrest units and a lumbar support unit. The backrest unit has several connectors at its bottom and several slots on its lumbar support unit. The backrest unit and the lumbar support unit are connected by a plug-in connection, thus combining the back support unit and the lumbar support unit into a complete backrest.

[0004] However, in the spirit of striving for excellence, the inventors have discovered the following problems with the above solution: In order to ensure the stability of the backrest, the connector needs to be configured as a high-strength steel structure. This not only requires more processing and manufacturing costs, but also, in the packaging process, after the back cushion unit and the lumbar cushion unit are stacked, the outward protruding connector rod is easy to scratch and damage the packaging box, which in turn causes the packaging box to collapse. The product inside the box directly bears the pressure of other stacked goods, and the product is prone to damage. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a modular seating backrest. By setting the bottom of the backrest unit and the top of the lumbar support unit as a stepped structure, and filling the splicing part with the mounting groove, and the mounting part with the splicing groove, not only can the backrest unit and the lumbar support unit fit more tightly and have higher connection strength, but the structure of the backrest unit and the lumbar support unit is also simple and the processing and manufacturing cost is lower. Furthermore, after packaging, the splicing part and the mounting part will not protrude outward, thus making it less likely to scratch or damage the packaging box and ensuring packaging quality.

[0006] The effect of this utility model is achieved as follows: This application provides a modular seating backrest, including a back cushion unit and a lumbar cushion unit that are spliced ​​together vertically. The bottom end of the back cushion unit has a stepped transition, and the back cushion unit includes a downwardly extending splicing part, with a splicing groove formed at a position that is recessed inward relative to the splicing part. The top end of the lumbar cushion unit has a stepped transition, and the lumbar cushion unit includes an upwardly extending mounting part, with a mounting groove formed at a position that is recessed inward relative to the mounting part. When the back cushion unit and the lumbar cushion unit are combined, the splicing part fills the mounting groove, and the mounting part fills the splicing groove. The splicing part and the mounting part are connected front to back, and the two are detachably connected by a quick-release structure.

[0007] Furthermore, the quick-assembly structure includes a mounting plate connected to the rear end of the mounting section. The mounting section has several through holes, and the splicing section has corresponding protrusions on the side near the mounting section. These protrusions pass through the through holes and are detachably connected to the mounting plate, thus clamping and fixing the mounting section between the mounting plate and the splicing section. This provides strong connection strength and stability between the mounting section, mounting plate, and splicing section. When the seat back is leaned against, the pressure is borne by the splicing sections on both sides and the mounting plate, protecting the central mounting section and extending the lifespan of the seat back.

[0008] Furthermore, the mounting plate has several positioning protrusions, which are engaged with the mounting part through through holes. This achieves initial positioning, facilitates subsequent installation and fixing operations, and further improves the connection strength and stability between the mounting plate and the mounting part.

[0009] Furthermore, a positioning groove is formed by the recess on the side of the positioning protrusion near the splicing part, and the mounting protrusion is engaged with the positioning protrusion through the positioning groove. This makes the mounting protrusion, positioning protrusion and mounting part fit more tightly in the vertical direction, thereby further improving the connection strength between the three and making the stability of the seat back better.

[0010] Furthermore, the mounting protrusion and the mounting plate are fixed together by screws. The mounting protrusion has a pre-embedded nut embedded within it, and the mounting plate has a connecting hole cut out in the area opposite the mounting protrusion. The screw passes through the connecting hole and engages with the pre-embedded nut in the mounting protrusion; the connecting hole is an oblong shape. This design ensures connection stability while accommodating minor deviations in the size and shape of the mounting protrusion, reducing assembly difficulty.

[0011] Furthermore, the quick-installation structure also includes a cover-like decorative cover, which is located on the rear side of the mounting plate and is configured to conceal the connection marks on the mounting plate. This ensures that no connection marks are exposed on the seat back, resulting in a cleaner appearance and effectively enhancing the aesthetics of the seat back.

[0012] Furthermore, the inner edge of the decorative cover is provided with several buckles, and the side wall of the mounting plate is correspondingly provided with several snap-fit ​​grooves. The buckles and snap-fit ​​grooves engage with each other, allowing the decorative cover to be detachably connected to the mounting plate. This not only provides good connection strength between the decorative cover and the mounting plate, but also makes the installation and removal of the two very convenient.

[0013] Furthermore, the lumbar support unit has a split structure, including a flexible lumbar support at the front and a wooden support plate at the rear. The portion of the support plate extending beyond the lumbar support forms a mounting section, and the recessed portion of the lumbar support relative to the support plate forms a mounting groove. This makes the overall structure of the lumbar support unit relatively simple and reduces manufacturing costs.

[0014] Furthermore, the backrest unit has a split structure, including a flexible backrest at the front and a plastic fixing plate at the rear. The bottom of the fixing plate is recessed forward to form a splicing groove. This makes the overall structure of the backrest unit relatively simple and reduces manufacturing costs.

[0015] Furthermore, the ends of the splicing and mounting parts are curved structures, and the splicing groove and mounting groove are corresponding curved grooves. This not only increases the contact area between the backrest unit and the lumbar support unit, improving the connection strength, but also enriches the visual effect of the seat back, further enhancing its aesthetics.

[0016] The modular seating backrest provided in this application adopts modular production, setting the seating backrest into two separable parts: a backrest unit and a lumbar support unit. During packaging, the backrest and lumbar support units can be disassembled and stacked for packaging, significantly reducing the space occupied by the seating backrest in the length direction, effectively saving packaging space and reducing packaging and transportation costs. Furthermore, by setting the bottom of the backrest unit and the top of the lumbar support unit into a stepped structure, with the splicing part filled with the mounting groove and the mounting part filled with the splicing groove, not only is the fit between the backrest unit and the lumbar support unit tighter and stronger, but the structure of the backrest unit and the lumbar support unit is also simple, resulting in lower processing and manufacturing costs. Moreover, the splicing part is directly formed in the backrest unit, and the mounting part is directly formed in the lumbar support unit. After packing, the splicing part and the mounting part will not protrude outwards, thus reducing the risk of scratching or damaging the packaging box, ensuring packaging quality, and preventing damage to the seating backrest during transportation. Attached Figure Description

[0017] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 A three-dimensional structural diagram of a seat backrest provided in an embodiment of this application; Figure 2 This is a schematic diagram of the back structure of a seat back provided in an embodiment of this application; Figure 3 A schematic diagram of the connection structure between the seat back and the decorative cover provided in an embodiment of this application; Figure 4 A schematic diagram of the connection structure between the back pad unit and the lumbar pad unit provided in an embodiment of this application; Figure 5 This is a schematic diagram of the internal structure of the lumbar support unit provided in an embodiment of this application; Figure 6 This is a schematic diagram of the internal structure of the back pad unit provided in an embodiment of this application; Figure 7 This is a cross-sectional structural diagram of the seat back provided in an embodiment of this application.

[0018] Reference numerals: 1-Backrest unit, 1a-Backrest part, 1b-Fixing plate, 110-Splicing part, 111-Splicing groove, 112-Mounting protrusion, 2-Lumbar cushion unit, 2a-Lumbar rest part, 2b-Support plate, 201-Mounting groove, 210-Mounting part, 211-Through hole, 3-Mounting plate, 301-Connecting hole, 302-Snap groove, 310-Positioning protrusion, 311-Positioning groove, 4-Decorative cover, 410-Undercut. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0020] Please refer to the attached document. Figure 1-7 This application provides a modular seating backrest, including a back cushion unit 1 and a lumbar cushion unit 2 that are spliced ​​together vertically. The bottom end of the back cushion unit 1 has a stepped transition, and the back cushion unit 1 includes a downwardly extending splicing portion 110. A splicing groove 111 is formed at a position that is recessed inward relative to the splicing portion 110. The top end of the lumbar cushion unit 2 has a stepped transition, and the lumbar cushion unit 2 includes an upwardly extending mounting portion 210. A mounting groove 201 is formed at a position that is recessed inward relative to the mounting portion 210. When the back cushion unit 1 and the lumbar cushion unit 2 are combined, the splicing portion 110 fills the mounting groove 201, and the mounting portion 210 fills the splicing groove 111. The splicing portion 110 and the mounting portion 210 are connected front to back, and the two are detachably connected by a quick-release structure.

[0021] In this embodiment, modular production is adopted, and the seat backrest is set into two parts that can be separated from each other: a back cushion unit 1 and a lumbar cushion unit 2. During packaging, the back cushion unit 1 and the lumbar cushion unit 2 can be separated and stacked for packaging, which greatly reduces the space occupied by the seat backrest in the length direction, effectively saving packaging space and reducing packaging and transportation costs. Furthermore, by setting the bottom of the back cushion unit 1 and the top of the lumbar cushion unit 2 into a stepped structure, with the splicing part 110 filling the mounting groove 201 and the mounting part 210 filling the splicing groove 111, not only is the fit between the back cushion unit 1 and the lumbar cushion unit 2 tighter and the connection strength higher, but the structure of the back cushion unit 1 and the lumbar cushion unit 2 is also simple, resulting in lower processing and manufacturing costs. Moreover, the splicing part 110 is directly formed in the back cushion unit 1, and the mounting part 210 is directly formed in the lumbar cushion unit 2. After packing, the splicing part 110 and the mounting part 210 will not protrude outwards, thus making it less likely to scratch or damage the packaging box, ensuring packaging quality, and preventing damage to the seat backrest during transportation.

[0022] Please refer to the attached document. Figure 4-5 In some embodiments of this application, the quick-installation structure includes a mounting plate 3, which is connected to the rear end of the mounting part 210. The mounting part 210 has a plurality of through holes 211 formed therein, and the splicing part 110 has a plurality of mounting protrusions 112 correspondingly protruding on the side near the mounting part 210. The mounting protrusions 112 pass through the through holes 211 and are detachably connected to the mounting plate 3, so that the mounting part 210 is clamped and fixed between the mounting plate 3 and the splicing part 110.

[0023] In this embodiment, the mounting part 210 is made of wood, while the splicing part 110 is made of plastic. Although this saves on processing and manufacturing costs, if the mounting part 210 is directly fixed to the splicing part 110, the connection strength and stability between the two are poor. When the seat back is leaned against, the mounting part 210 and the splicing part 110 are prone to loosening under pressure, resulting in poor stability. Furthermore, the wooden mounting part 210 is prone to cracking due to direct pressure. Therefore, by providing a mounting plate 3 on the rear side of the mounting part 210, the mounting protrusion 112 on the splicing part 110 passes through the mounting part 210 and is directly connected to the mounting plate 3. This clamps and fixes the mounting part 210 between the mounting plate 3 and the splicing part 110, resulting in a strong connection strength and stability among the three components. Under pressure, it is not easy to loosen. When the seat back is leaned against, the pressure is borne by the splicing parts 110 on both sides and the mounting plate 3, which protects the mounting part 210 in the middle and extends the service life of the seat back.

[0024] Preferably, the mounting plate 3 is also made of plastic. The mounting plate 3 is directly fixed to the rear end of the mounting part 210 by self-tapping screws, making the installation operation simple.

[0025] Please refer to the attached document. Figure 4-5In some embodiments of this application, a plurality of positioning protrusions 310 are formed on the mounting plate 3, and the positioning protrusions 310 are engaged with the mounting part 210 through the through hole 211.

[0026] In this embodiment, when the mounting plate 3 is installed onto the mounting part 210, the positioning protrusion 310 is first aligned with the through hole 211 and inserted, so that the mounting plate 3 and the mounting part 210 are relatively fixed in the vertical direction, thus achieving preliminary positioning, which facilitates subsequent installation and fixing operations, and further improves the connection strength and stability between the mounting plate 3 and the mounting part 210.

[0027] Please refer to the attached document. Figure 4-5 In some embodiments of this application, the positioning protrusion 310 has a positioning groove 311 recessed on the side near the splicing part 110, and the mounting protrusion 112 is engaged with the positioning protrusion 310 through the positioning groove 311.

[0028] In this embodiment, by opening a positioning groove 311 on the positioning protrusion 310 to engage the mounting protrusion 112, the mounting protrusion 112, the positioning protrusion 310, and the mounting part 210 are more closely fitted in the vertical direction, thereby further improving the connection strength between the three and making the stability of the seat back better.

[0029] Please refer to the attached document. Figure 7 In some embodiments of this application, the mounting protrusion 112 and the mounting plate 3 are fixed by screw connection. The mounting protrusion 112 is embedded with a pre-embedded nut. The mounting plate 3 has a connecting hole 301 cut out in the part opposite to the mounting protrusion 112. The screw passes through the connecting hole 301 and is threadedly engaged with the pre-embedded nut in the mounting protrusion 112. The connecting hole 301 is an oblong hole.

[0030] In this embodiment, the protrusion 112 and the mounting plate 3 are fixedly installed by screw connection, which makes the installation and disassembly operation more convenient and the connection strength is better. In addition, by setting the connecting hole 301 as an oblong hole, the connection stability is ensured while accommodating small deviations in size and shape of the mounting protrusion 112, reducing the assembly difficulty.

[0031] Please refer to the attached document. Figure 2-3 In some embodiments of this application, the quick-installation structure further includes a cover-shaped decorative cover 4, which is disposed on the rear side of the mounting plate 3. The decorative cover 4 is configured to conceal the connection marks on the mounting plate 3. This ensures that the seat back does not have any exposed connection marks, making it appear cleaner and effectively improving the aesthetics of the seat back.

[0032] Please refer to the attached document. Figure 2-3In some embodiments of this application, the inner edge of the decorative cover 4 is provided with several buckles 410, and the side wall of the mounting plate 3 is correspondingly provided with several buckle grooves 302. The buckles 410 and the buckle grooves 302 engage with each other, so that the decorative cover 4 is detachably connected to the mounting plate 3. This not only provides good connection strength between the decorative cover 4 and the mounting plate 3, but also makes the installation and disassembly operations between the two very convenient.

[0033] Please refer to the attached document. Figure 5 In some embodiments of this application, the lumbar support unit 2 is a split structure, including a lumbar support 2a made of flexible material on the front side and a wooden support plate 2b on the rear side. The portion of the top of the support plate 2b that extends beyond the lumbar support 2a forms a mounting portion 210, and the recessed portion of the lumbar support 2a relative to the support plate 2b forms a mounting groove 201.

[0034] In this embodiment, the flexible lumbar support 2a provides comfortable support for the human waist, and the wooden support plate 2b ensures the strength of the lumbar support unit 2. The mounting part 210 is formed by the portion of the support plate 2b extending beyond the lumbar support 2a, making the overall structure of the lumbar support unit 2 relatively simple and the manufacturing cost low.

[0035] Please refer to the attached document. Figure 6 In some embodiments of this application, the back pad unit 1 is a split structure, including a back support 1a made of flexible material on the front side and a fixing plate 1b made of plastic material on the rear side. The bottom of the fixing plate 1b is recessed forward to form a splicing groove 111.

[0036] In this embodiment, the flexible backrest 1a provides comfortable support for the human back, and the plastic fixing plate 1b ensures the strength of the backrest unit 1. The fixing plate 1b is integrally molded by injection molding, and a recessed splicing groove 111 is directly formed on the fixing plate 1b, making the overall structure of the backrest unit 1 relatively simple and the manufacturing cost low.

[0037] Please refer to the attached document. Figure 4 In some embodiments of this application, the ends of the splicing part 110 and the mounting part 210 are curved structures, and the splicing groove 111 and the mounting groove 201 are corresponding curved grooves.

[0038] In this embodiment, by setting the splicing part of the back cushion unit 1 and the lumbar cushion unit 2 as a curved structure, not only is the contact area between the two enhanced, thereby improving the connection strength, but also the splicing marks on the seat back are corresponding curves, enriching the visual effect of the seat back and further improving its aesthetics.

[0039] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate 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, 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, and therefore should not be construed as a limitation of this utility model. 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 with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means three or more.

[0040] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A modular seating backrest, characterized in that, The device includes a back pad unit (1) and a waist pad unit (2) that are spliced ​​together vertically. The bottom of the back pad unit (1) has a stepped transition at the front and back. The back pad unit (1) includes a splicing part (110) that extends downwards. A splicing groove (111) is formed at a position that is recessed inwards relative to the splicing part (110). The top of the waist pad unit (2) has a stepped transition at the front and back. The waist pad unit (2) includes an mounting part (210) that extends upwards. A mounting groove (201) is formed at a position that is recessed inwards relative to the mounting part (210). When the back pad unit (1) and the waist pad unit (2) are combined, the splicing part (110) fills the mounting groove (201), and the mounting part (210) fills the splicing groove (111). The splicing part (110) and the mounting part (210) are connected front to back, and the two are detachably connected by a quick-release structure.

2. The modular seating backrest according to claim 1, characterized in that, The quick-installation structure includes a mounting plate (3), which is connected to the rear end of the mounting part (210). The mounting part (210) has a plurality of through holes (211) formed on it. The splicing part (110) has a plurality of mounting protrusions (112) protruding on the side near the mounting part (210). The mounting protrusions (112) pass through the through holes (211) and are detachably connected to the mounting plate (3), so that the mounting part (210) is clamped and fixed between the mounting plate (3) and the splicing part (110).

3. The modular seating backrest according to claim 2, characterized in that, The mounting plate (3) has a plurality of positioning protrusions (310), which are engaged with the mounting part (210) through the through hole (211).

4. The modular seating backrest according to claim 3, characterized in that, The positioning protrusion (310) has a positioning groove (311) recessed on the side near the splicing part (110), and the mounting protrusion (112) is engaged with the positioning protrusion (310) through the positioning groove (311).

5. The modular seating backrest according to claim 2, characterized in that, The mounting protrusion (112) and the mounting plate (3) are fixed together by screws. The mounting protrusion (112) is embedded with a pre-embedded nut. The mounting plate (3) has a connecting hole (301) formed in the part opposite to the mounting protrusion (112). The screw passes through the connecting hole (301) and is threadedly engaged with the pre-embedded nut in the mounting protrusion (112). The connecting hole (301) is a waist-shaped hole.

6. The modular seating backrest according to claim 2, characterized in that, The quick-install structure also includes a cover-shaped decorative cover (4), which is placed on the rear side of the mounting plate (3) and is configured to cover the connection marks on the mounting plate (3).

7. The modular seating backrest according to claim 6, characterized in that, The inner edge of the decorative cover (4) is provided with several buckles (410), and the side wall of the mounting plate (3) is provided with several buckle grooves (302). The buckles (410) and the buckle grooves (302) are engaged to make the decorative cover (4) detachably connected to the mounting plate (3).

8. The modular seating backrest according to claim 1, characterized in that, The lumbar support unit (2) is a split structure, including a front lumbar support (2a) and a rear wooden support plate (2b). The portion of the top of the support plate (2b) that extends beyond the lumbar support (2a) forms the mounting portion (210), and the recessed portion of the lumbar support (2a) relative to the support plate (2b) forms the mounting groove (201).

9. The modular seating backrest according to claim 1, characterized in that, The back pad unit (1) is a split structure, including a front backrest (1a) and a rear plastic fixing plate (1b). The bottom of the fixing plate (1b) is recessed forward to form the splicing groove (111).

10. The modular seating backrest according to claim 1, characterized in that, The ends of the splicing part (110) and the mounting part (210) are curved structures, and the splicing groove (111) and the mounting groove (201) are corresponding curved grooves.

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