A car seat elastic suspension structure

Abstract

This invention relates to the field of automotive seat accessories, specifically an automotive seat elastic suspension structure. It involves the seat back and seat cushion portions, comprising a reinforced elastic fabric adapted to the seat dimensions and support rods connected to both sides of the fabric. Multiple suspension parts are provided on the inner side of the seat frame to suspend the support rods. During assembly, the reinforced elastic fabric is secured to the seat frame beams via the support rods and suspension parts. Advantages include: simplified appearance, easy assembly, uniform elasticity, enhanced driving comfort, high safety, and convenient maintenance. More importantly, it allows for an optimized balance between strength and lightweight design in the automotive seat frame, making it a promising candidate for application in the automotive industry.

Description

Technical Field

[0001] This invention relates to the field of automotive seat accessories, specifically to an automotive seat elastic suspension structure. Background Technology

[0002] With energy conservation and environmental protection gaining widespread acceptance, lightweighting of automobiles has become an inevitable trend in the automotive industry. The rapid development of new energy vehicles, in particular, has placed higher demands on the lightweighting of automotive parts manufacturing. Furthermore, as living standards improve, people are increasingly seeking greater comfort in their vehicles.

[0003] Currently, the number of automotive seat components is increasing as automotive seat performance improves, leading to more complex assembly processes and increased weight. Therefore, automotive manufacturing particularly needs to utilize components that are simple in structure, easy to assemble, and lightweight.

[0004] Car seats consist of a backrest (1) and a seat cushion (2), and are constructed using a seat frame covered with foam (3). The seat frame mainly comprises a backrest frame (4) and a seat frame frame (5). To make the seat elastic and reduce deformation, one traditional method is to install springs (6) under the outer foam (3), specifically within the backrest frame (4) and seat frame frame (5). Another traditional method is to install steel wires (7) within the backrest frame (4) and seat frame frame (5). While these two methods solve the problem of seat elastic deformation, they still have significant drawbacks: first, the springs are made of steel, resulting in a heavier overall weight; second, the structure and installation are not simple; third, the elastic deformation is not smooth, and the reduction in cushioning force due to bumps and impacts during driving is relatively small, leading to uneven force distribution and significantly reducing passenger comfort; fourth, in the event of a car accident, the springs may break due to compression, potentially causing secondary injuries.

[0005] In the existing technology, there are no technical solutions for reinforced elastic fabrics, which are monofilament fabrics, in this field. Currently, these solutions only involve other fields. For example, Chinese applications CN201710925874.1 and CN107627743A disclose an application of an industrial fabric, relating to the field of printer technology. The industrial fabric described is a mesh woven from monofilament warp and weft yarns, with a double-layered warp structure or texture: the upper layer of warp yarns interweaves with the weft yarns on the upper layer, and the lower layer of warp yarns interweaves with the weft yarns on the lower layer, without the upper and lower warp yarns crossing each other. Another example is Chinese applications CN201710637739.7 and CN107435273A, which disclose a papermaking blanket and its preparation method, relating to the papermaking industry. The papermaking felt comprises: a surface layer, a base fabric layer, and a reverse flocked layer; wherein, the surface layer comprises a fiber web layer and a surface coating layer, the base fabric layer is made of nylon, and forming the base fabric layer comprises: twisting several strands of nylon or nylon monofilaments to form the base fabric layer, wherein the base fabric layer is a single layer, a double layer, or a composite layer, and the fabric structure of the base fabric layer is 1 / 3 or 1 / 5; for example, Chinese applications CN200710190428.7 and CN101440542A disclose a monofilament fabric and its production method, wherein the warp yarns constituting the fabric are monofilaments, the weft yarns constituting the monofilament fabric are monofilaments, the monofilaments are polyester or nylon, the monofilament form is DTY or FDY, and the fineness of the monofilaments is 10D to 50D. The production process includes pre-weaving preparation, weaving, and dyeing and finishing. The pre-weaving preparation includes warping, warping, heddle threading, and reed threading. The dyeing and finishing process includes fabric setting, refining, intermediate setting, weight reduction, dyeing, functional resin finishing, and finishing setting. The fabric is lightweight, ultra-thin, soft, and breathable, making it suitable for various styles of fashion. Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention aims to provide a simple-to-assemble, lightweight, and high-strength seat elastic suspension structure. This structure meets the flame-retardant requirements of the automotive industry, is non-toxic and odorless, and possesses higher strength and more suitable elasticity.

[0007] To achieve this objective, the present invention adopts the following technical solution: an automotive seat elastic suspension structure, involving a seat back and a seat cushion, comprising a reinforcing elastic fabric adapted to the seat size and support rods connected to both sides of the fabric, with multiple suspension parts for suspending the support rods respectively provided on the inner side of the seat frame. During assembly, the reinforcing elastic fabric is fastened to the seat frame beams by the suspension through the cooperation of the support rods and the suspension parts.

[0008] The reinforcing elastic fabric is folded over the support rod on two or four opposite sides, and the folds are sewn or heat-sealed; multiple positioning and mounting holes are left on the inner side of the support rod at the folds, and the mounting holes are fitted onto the suspension part during installation.

[0009] The suspension part is designed in the shape of a hanging ear for suspending and fixing the support rod. It can be installed on the inner side of the vertical frame beams on both sides of the backrest and on the front and rear frame beams of the seat cushion.

[0010] The automotive seat elastic suspension structure is adjusted in the backrest section to a trapezoidal structure or other quadrilateral structure, or other suitable polygonal structure, depending on the shape of the backrest frame.

[0011] The backrest frame or seat frame is also equipped with a tension adjustment device to adjust the tension of the elastic fabric.

[0012] The tension adjustment device includes a bidirectional drive motor, a static torque sensor, a worm gear, and a worm wheel. The bidirectional drive motor is fixedly mounted on the backrest frame or seat frame. One end of the static torque sensor is connected to the drive shaft of the bidirectional drive motor via a coupling, and the other end is connected to the worm gear via a coupling. The worm wheel is connected to a shaped support rod. The shaped support rod is designed with one of two opposing support rods as a shaped support rod that can clamp the folded edge. One end of the shaped support rod is connected to the worm wheel. The rotation of the bidirectional drive motor drives the shaped support rod to rotate, causing the reinforcing elastic fabric portion to be wound onto the shaped support rod, thereby adjusting the tension of the reinforcing elastic fabric.

[0013] The reinforced elastic fabric is a warp-weft interwoven fabric. The warp yarns include pure spun yarns, blended yarns, or blended fibers, and the weft yarns are composed of single filaments or several single filaments arranged in parallel. The fineness of the single filaments is 90D to 3600D. The longitudinal strength of the fabric is above 50N / mm, and the maximum elongation is between 10% and 30%. The transverse strength of the fabric is above 30N / mm, and the maximum elongation is between 50% and 80%, meeting the flame retardant and environmental protection requirements of the automotive industry.

[0014] Therefore, the present invention has the following beneficial effects: simplified appearance, simple assembly, uniform elasticity, strong driving comfort, high safety, convenient maintenance, and reduced maintenance frequency due to the high strength of the materials. More importantly, it can also achieve an optimized configuration between the strength and lightweight of the car seat frame, and has broad application prospects in the automotive industry.

[0015] Of course, this technical solution can still be used to implement fixed seats with similar frame structures for other purposes, such as seats in high-speed trains, airplanes, and ships, because the implementation logic and methods are the same. It is just a specific embodiment of the present invention for practical purposes. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

[0017] The attached diagram is described below:

[0018] Figure 1 This is a schematic diagram of a structure having one embodiment of the present invention, showing the combined installation position of the elastic suspension structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the seat cushion installation structure from below according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the suspension elastic component structure according to an embodiment of the present invention;

[0021] Figure 4 This is an enlarged schematic diagram of a partial structure of the mounting portion according to an embodiment of the present invention;

[0022] Figure 5 This is an enlarged schematic diagram of a portion of the mounting structure in an embodiment of the present invention with adjustable tension;

[0023] Figure 6 This is a schematic diagram of the traditional structure of a seat frame in the prior art.

[0024] In the diagram: 1. Backrest; 2. Seat cushion; 3. Outer foam; 4. Backrest frame; 5. Seat frame; 6. Spring; 7. Steel wire; 11. Reinforcing elastic fabric; 12. Support rod; 120. Irregularly shaped support rod; 13. Folded edge; 14. Positioning mounting hole; 15. Frame beam; 16. Suspension; 17. Tension adjustment device; 18. Bidirectional drive motor; 19. Static torque sensor; 20. Worm gear; 21. Worm wheel; 22. Coupling. Detailed Implementation

[0025] The object of this invention is to provide a flexible suspension structure for an automobile seat. To illustrate this object in detail, accompanying drawings are provided. In the drawings, the same components will be given corresponding reference numerals in various cases. For clarity, components may not have reference numerals in some drawings, although these components are labeled in other drawings.

[0026] Example 1: A car seat elastic suspension structure, involving a seat back part 1 and a seat cushion part 2, has an enhanced elastic fabric 11 adapted to the seat size and support rods 12 connected to both sides of the fabric. Multiple suspension parts 16 are provided on the inner side of the seat frame to suspend the support rods 12. During assembly, the enhanced elastic fabric is suspended and fastened between the seat frame beams 15 through the cooperation of the support rods 12 and the suspension parts 16. The enhanced elastic fabric 11 covers the support rods 12 with folded edges 13 on opposite sides or opposite four sides, and the folded edges 13 are sewn or heat-sealed. Multiple positioning and mounting holes 14 are left on the inner side of the support rods 12 at the folded edges 13. During installation, the mounting holes 14 are sleeved on the suspension parts 16. The suspension parts 16 are set in the shape of hanging ears for suspending and fixing the support rods 12, and can be set on the vertical frame beams 15 on both sides of the backrest frame 4 and the front and rear frame beams 15 of the seat frame 5. The car seat elastic suspension structure is adjusted to a trapezoidal structure or other quadrilateral structure, or other suitable polygonal structure, according to the shape of the backrest frame 4.

[0027] Example 2: Unlike Example 1, a tension adjustment device 17 for adjusting the tension of the reinforcing elastic fabric 11 is also provided on the backrest frame 4 or seat frame 5. The tension adjustment device 17 includes a bidirectional drive motor 18, a static torque sensor 19, a worm gear 20, and a worm wheel 21. The bidirectional drive motor 18 is fixedly installed on the backrest frame 4 or seat frame 5. One end of the static torque sensor 19 is connected to the drive shaft of the bidirectional drive motor 18 via a coupling 22, and the other end is connected to the worm gear 20 via a coupling 22. The worm gear 21 is connected to the irregular support rod 120. The irregular support rod 120 is designed with one of the two opposing support rods 12 as an irregular support rod structure that can clamp the folded edge. One end of the irregular support rod 120 is connected to the worm gear 21. The rotation of the bidirectional drive motor 18 drives the irregular support rod 120 to rotate, so that part of the reinforced elastic fabric 11 is wound onto the irregular support rod 120. The maximum torque control of the static torque sensor 19 is used to adjust the tension of the reinforced elastic fabric 11.

[0028] In the above embodiments, the elastic fabric used is a warp-weft interwoven fabric. The warp yarns include pure spun yarns, blended yarns, or blended fibers, and the weft yarns are composed of monofilaments or several monofilaments arranged in parallel. The fineness of the monofilaments is 90D to 3600D. The longitudinal strength of the fabric is above 50N / mm, and the maximum elongation is between 10% and 30%. The transverse strength of the fabric is above 30N / mm, and the maximum elongation is between 50% and 80%, meeting the flame retardant and environmental protection requirements of the automotive industry.

[0029] Figure 1A schematic diagram of a structure according to an embodiment of the present invention is shown. In an automotive seat elastic suspension structure, the backrest portion 1 reinforced with elastic fabric 11 and support rod 12 forms a vertical suspension, while the seat cushion portion 2 reinforced with elastic fabric 11 and support rod 12 forms a horizontal suspension.

[0030] like Figure 1 In the preferred embodiment shown, a car seat elastic suspension structure is adjusted in the backrest portion 1 to a trapezoidal structure and a quadrilateral structure according to the shape of the backrest frame 4.

[0031] like Figure 1 In the preferred embodiment shown, it can be imagined that the shape of the reinforcing elastic fabric 11 is adjusted to a polygon according to the backrest frame 4.

[0032] Figure 2 This diagram illustrates a bottom view (or projection view) of the seat cushion portion installation according to an embodiment of the present invention. Figures 1-4 As shown, the reinforced elastic fabric 11 is fastened to the seat frame by the support rod 12. Specifically, the support rod 12 supports the reinforced elastic fabric 11 and suspends it between the frame beams 15 of the seat frame.

[0033] Figure 3 This diagram illustrates a suspension elastic component structure according to an embodiment of the present invention. An automotive seat elastic suspension structure includes a reinforcing elastic fabric 11 and a support rod 12.

[0034] Figure 4 This diagram shows a partial enlarged structural view of the mounting portion according to an embodiment of the present invention, illustrating the specific mounting position of the seat spring suspension structure and the cooperation relationship between the support rod and the suspension part. Figures 1-4 As shown, the support rod 12 has hook-shaped ends, and the suspension part 16 is a hook attached to the frame. The reinforcing elastic fabric 11 is fastened to the seat frame by the support rod 12, specifically, the support rod 12 supports and suspends the reinforcing elastic fabric 11 between the frame beams 15 of the seat frame through the hooks.

[0035] Figure 6 This diagram shows a partial enlarged view of the installation location of the tension adjustment device in an embodiment of the present invention, illustrating the structure of the tension adjustment device and its installation position.

[0036] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4A car seat elastic suspension structure includes a reinforcing elastic fabric 11 and a support rod 12. Preferably, the support rod 12 has hook-shaped ends to prevent slippage and provide positioning. The reinforcing elastic fabric 11 has folded edges on opposite sides, with the shape adjusted to be generally rectangular according to the backrest frame 4 or seat frame 5. These edges are formed by sewing or heat sealing to create opposing folded edges 13, which cover the support rod 12. Positioning and mounting holes 14 are provided at the folded edges 13. The number of positioning and mounting holes 14 can be adjusted from 3 to 10 depending on the length of the frame beam.

[0037] Combination Figure 2 , Figure 3 , Figure 4 The lower surface of the frame beam 15 of the seat frame is provided with hanging ears. The number of hanging ears is the same as the number of positioning mounting holes 14, and they correspond one-to-one. They are used to tighten and fix the support rod 12. The lateral side of the reinforcing elastic fabric 11 is fastened and suspended between the frame beam 15 of the seat frame by the support rods 12 on both sides.

[0038] Combination Figure 1 , Figure 5 The seat spring suspension structure may also have a tension adjustment device 17. For example... Figure 1 In the embodiment shown, the tension adjustment device 17 is mounted on the seat frame 5. The tension adjustment device 17 includes a bidirectional drive motor 18, a static torque sensor 19, a worm gear 20, and a worm wheel 21. The bidirectional drive motor 18 is fixedly mounted on the backrest frame 4 or the seat frame 5. One end of the static torque sensor 19 is connected to the drive shaft of the bidirectional drive motor 18 via a coupling 22, and the other end is connected to the worm gear 20 via a coupling 22. The worm wheel 21 is connected to the irregular support rod 120. The irregular support rod 120 is designed with one of the two opposing support rods 12 as an irregular support rod structure that can clamp the folded edge. One end of the irregular support rod 120 is connected to the worm wheel 21. The rotation of the bidirectional drive motor 18 drives the irregular support rod 120 to rotate, so that part of the reinforcing elastic fabric 11 is wound onto the irregular support rod 120. The maximum torque of the static torque sensor 19 controls the degree of adjustment to adjust the tension of the reinforcing elastic fabric 11.

[0039] The present invention also provides a method for preparing a reinforced elastic fabric from a monofilament fabric, and the following describes the embodiments in detail.

[0040] The elastic fabric is a monofilament fabric woven longitudinally and laterally. The longitudinal direction of the monofilament fabric is the warp yarn, which may be pure spun, blended, or mixed fiber. The transverse direction of the monofilament fabric is the weft yarn, which is a single filament. The single filament is composed of one or several parallel filaments arranged to form the weft yarn. The fineness of the single filament is 90D to 3600D (100 to 4000 dtex).

[0041] To overcome the shearing and even impact forces experienced by vehicles during driving, the reinforced elastic fabric must possess high strength, good elastic recovery, and excellent abrasion and fatigue resistance. The longitudinal strength of the monofilament fabric is above 50 N / mm, with a maximum elongation controlled between 10% and 30%; the transverse strength is above 30 N / mm, with a maximum elongation controlled between 50% and 80%, while also meeting the flame-retardant and environmental protection requirements of the automotive industry.

[0042] Preferably, the warp yarn of the reinforced elastic fabric is made of modified polyester fiber ply yarn, for the following reasons: Polyester fiber is currently the most produced polymer, with low cost, high strength and elastic recovery ability, durability, and good shape retention. Verified by the inventors through extensive experimental data, the preferred polyester fiber warp yarn specification is 28tex×2, with a yarn strength of not less than 29cN / tex. Adding a certain proportion of high-shrinkage, high-strength modified polyester fiber during spinning increases elasticity; this proportion is 10-50%. Furthermore, flame retardants and stiffening agents are added during the finishing process after weaving. The resulting reinforced elastic fabric has a maximum longitudinal elongation of 10%-30% and a strength exceeding 80N / mm. The effect is that the reinforced elastic fabric has a high initial modulus in the longitudinal direction. When the overall load is less than 1000N, it is not easy to deform or the deformation is very small. Under this condition, the elastic recovery rate is almost 100%. However, when the deformation reaches 3%, an external force of 2000N needs to be applied, and the elastic recovery rate is 95% to 100%.

[0043] Preferably, the weft yarn of the reinforcing elastic fabric is made of polyethylene / polypropylene composite fiber filament. Preferably, the polyethylene is high-density polyethylene, and the composite fiber filament is a core-sheath composite monofilament arranged in parallel during weaving to form a double filament. The reasons are as follows: High-density polyethylene is non-toxic and odorless, with a density in the range of 0.940 to 0.976 g / cm3, a softening point of 125 to 135℃, and a service temperature of up to 100℃. Its hardness, tensile strength, and creep resistance are superior to low-density polyethylene, and its wear resistance and cold resistance are also good. Polypropylene has a density of 0.91 g / cm3, a heat resistance of up to 120℃, a melting temperature of 170℃, high strength, high hardness, resistance to bending fatigue, easy processing and molding, and low price. This composite fiber, with high-density polyethylene as the sheath and polypropylene as the core, combines the advantages of polyethylene's high abrasion resistance and polypropylene's high strength, while overcoming polypropylene's shortcomings of poor light resistance and easy aging. By combining the two in a specific ratio (30%–70% polyethylene in the sheath and 70%–30% polypropylene in the core), elastic monofilaments with an elongation at break of over 50% and a breaking strength of 4 cN / dtex can be obtained. Crucially, the similar densities and good bonding between the two prevent the sheath and core from separating under external stretching, thus avoiding a decrease in strength. During the finishing process after weaving, due to the low softening point of the polyethylene in the sheath, a lower finishing temperature is used from an energy-saving perspective, allowing for the fusion bonding of the polyethylene sheath to firmly strengthen the longitudinal and transverse yarns of the elastic fabric. Therefore, the price is lower while maintaining the excellent performance of the raw materials. The effect is that the initial modulus of the reinforced elastic fabric in the transverse direction is slightly lower than that in the longitudinal direction. When the overall load is less than 600N, it is not easy to deform or the deformation is very small. Under this condition, the elastic recovery rate is almost 100%. When the deformation reaches 5%, an external force of 1500N needs to be applied. At this time, the elastic recovery rate is 95% to 100%.

[0044] Preferably, after weaving, the aforementioned reinforced elastic fabric should undergo post-setting to obtain ideal flame retardant effect and stiffness, and to ensure good yarn shape retention. The setting temperature is preferably 145℃. During the setting process, a non-toxic organophosphorus flame retardant is added at a concentration of 10% in the padding liquor. The stiffening agent is preferably 10% vinyl acetate homopolymer latex. Test data show that the resulting reinforced elastic fabric has a longitudinal strength of over 80 N / mm and a maximum elongation of 10%–30%; the transverse strength of the fabric is over 30 N / mm and the maximum elongation is 50%–80%.

[0045] The overall effect of the combined longitudinal and lateral load-bearing design is as follows: Under normal use, the outer foam initially bears most of the load, then a small portion is transferred to the reinforcing elastic fabric of the seat's suspension mechanism. The load is evenly distributed longitudinally and laterally. Taking a 30cm length as an example, when the overall load is below 1000N, deformation is minimal or negligible, resulting in an elastic recovery rate of almost 100%. When the deformation reaches 5%, an external force exceeding 3000N is required, at which point the elastic recovery rate is 95%–100%. Therefore, this design ensures a 100% elastic recovery rate under normal use, while also providing good fatigue resistance and meeting the flame-retardant and environmental requirements of the automotive industry.

Claims

1. A car seat elastic suspension structure, relating to the seat back portion and the seat cushion portion, characterized in that, It has a reinforced elastic fabric adapted to the size of the seat and support rods connected to both sides of the fabric. Multiple suspension parts are provided on the inner side of the seat frame to suspend the support rods. During assembly, the reinforced elastic fabric is suspended and fastened between the seat frame beams through the cooperation of the support rods and the suspension parts. The reinforced elastic fabric is a warp-weft interwoven fabric. The warp yarns include pure spun yarns, blended yarns, or blended fibers, and the weft yarns are composed of monofilaments or several monofilaments arranged in parallel. The fineness of the monofilaments is 90D to 3600D. The longitudinal strength of the reinforced elastic fabric is above 50N / mm, and the maximum elongation is 10% to 30%. The transverse strength of the reinforced elastic fabric is above 30N / mm, and the maximum elongation is 50% to 80%, meeting the flame retardant and environmental protection requirements of the automotive industry. The warp yarn is a modified polyester fiber ply yarn, with 10-50% modified polyester fiber added during spinning. The warp yarn has a specification of 28tex×2 and a strength of not less than 29cN / tex. Flame retardants and stiffening agents are added during the finishing process after weaving, resulting in a maximum longitudinal elongation of 20%-30% and a strength exceeding 80N / mm for the reinforced elastic fabric. Based on a length of 30cm, when the longitudinal deformation of the reinforced elastic fabric reaches 3%, an external force of 2000N needs to be applied. At this time, the elastic recovery rate of the reinforced elastic fabric is 95%-100%. The weft yarn has a density of 0.940–0.976 g / cm³. 3 Within the specified range, the softening point is 125–135℃, and the service temperature reaches 100℃. The outer layer is made of polyethylene with a density of 0.91 g / cm³. 3 A core-sheath composite monofilament with a heat resistance of up to 120℃ and a melting temperature of 170℃ is used as the core layer. The polyethylene and polypropylene are composited in a certain ratio, with polyethylene accounting for 30%–70% and polypropylene accounting for 70%–30% of the core-sheath composite monofilament. This results in a core-sheath composite monofilament with an elongation at break of over 50% and a tensile strength of 4 cN / dtex. During the finishing process after weaving, a non-toxic organophosphorus flame retardant is added at a concentration of 10% in the rolling liquor and 10% in the vinyl acetate homopolymer latex. Based on a length of 30cm, when the transverse deformation of the reinforced elastic fabric reaches 5%, an external force of 1500N needs to be applied, at which point the elastic recovery rate is 95%–100%. A tension adjustment device for adjusting the tension of the reinforcing elastic fabric is also provided on the backrest frame or seat frame. The tension adjustment device includes a bidirectional drive motor, a static torque sensor, a worm gear, and a worm wheel. The bidirectional drive motor is fixedly installed on the backrest frame or seat frame. One end of the static torque sensor is connected to the drive shaft of the bidirectional drive motor through a coupling, and the other end is connected to the worm gear through a coupling. The worm wheel is connected to a shaped support rod. The shaped support rod is designed with one of the two opposing support rods as a shaped support rod that can clamp the folded edge. One end of the shaped support rod is connected to the worm wheel. The rotation of the bidirectional drive motor drives the shaped support rod to rotate, so that the reinforcing elastic fabric is wound onto the shaped support rod. The maximum torque of the static torque sensor controls the degree of adjustment to adjust the tension of the reinforcing elastic fabric. The reinforcing elastic fabric covers the support rods on two or four opposite sides with folded edges, and the folded edges are sewn or heat-sealed. Multiple positioning and mounting holes are left on the inner side of the support rods at the folded edges. During installation, the mounting holes are fitted onto the suspension part. The suspension part of the backrest is set on the inner side of the vertical frame beams on both sides of the backrest, and the suspension part of the seat cushion is set on the front and rear frame beams of the seat cushion. The two ends of the support rods are hook-shaped, and the suspension part is a hanging lug that is integrated with the frame. The car seat frame is covered with an outer foam. When the car seat is in use, the outer foam first bears most of the load, and then transfers a small portion of the load to the reinforcing elastic fabric. The load is evenly distributed in both the longitudinal and transverse directions of the reinforcing elastic fabric. Taking a length of 30cm as a unit, the reinforcing elastic fabric is not prone to deformation when the overall load is less than 1000N. When the deformation reaches 5%, an external force load of more than 3000N needs to be applied to the entire reinforcing elastic fabric. At this time, the elastic recovery rate is 95% to 100%.

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