Backrest framework, seat and automobile

Abstract

The invention relates to the technical field of automobile manufacturing, in particular to a backrest framework, a seat and an automobile. The backrest framework comprises a framework body and side wing supporting structures; the side wing supporting structures are arranged on the face, facing a driver and passengers, of the framework body and spirally extend in the length direction of the framework body. The contact area of the backrest framework and the side wings of the back of the human body is larger, the fitting degree is higher, local pressure can be dispersed, and the situation of local excessive extrusion is avoided; meanwhile, the spirally-extending side wing supporting structures have good elastic deformation capacity, self-adaptive elastic supporting can be achieved according to pressure feedback of the backs of drivers and passengers, and the defect that local supporting force of a traditional structure is insufficient is overcome.

Description

Technical Field

[0001] This invention relates to the field of automobile manufacturing technology, specifically to a backrest frame, a seat, and an automobile. Background Technology

[0002] Cars have gradually become one of the important means of transportation for people's daily travel. With the continuous improvement of living standards, users have higher and higher requirements for reliability in addition to their needs for transportation.

[0003] The backrest frame of a car seat provides support for the back of the driver and passenger through side wing steel wires. Currently, most of the existing side wing steel wires are difficult to adapt to the pressure requirements of different areas of the human back during the support process, and often there are cases of insufficient local support or excessive compression. Summary of the Invention

[0004] (i) The technical problem to be solved by the present invention is that the side wing steel wires of the existing backrest frame are difficult to achieve adaptive support according to the pressure requirements of different areas of the human back during the support process, and often there is insufficient local support or excessive compression.

[0005] (II) Technical Solution To address the aforementioned technical problems, embodiments of the present invention provide a backrest frame for a seat, comprising a frame body and side wing support structures; The side wing support structure is located on the side of the frame body facing the driver and passengers, and the side wing support structure extends in a spiral shape along the length of the frame body.

[0006] Furthermore, the side wing support structure is a multi-segment structure, and at least two segments have different helical curvature radii and cross-sectional diameters.

[0007] Furthermore, the side support structure includes a shoulder support section, a waist support section, and a hip support section connected in sequence. The spiral curvature radii of the shoulder support section, the waist support section, and the hip support section vary in a gradient.

[0008] Furthermore, the cross-sectional diameters of the shoulder support section, the waist support section, and the hip support section vary in a gradient.

[0009] Furthermore, the spiral curvature radius of the shoulder support section is 8-10mm, the spiral curvature radius of the waist support section is 4-6mm, and the spiral curvature radius of the hip support section is 12-15mm. The cross-sectional diameter of the shoulder support section is 3.0-3.5 mm, the cross-sectional diameter of the waist support section is 4.0-4.5 mm, and the cross-sectional diameter of the hip support section is 3.5-4.0 mm.

[0010] Furthermore, the side wing support structure also includes a transition section; The transition sections are provided between the shoulder support section and the waist support section, and between the waist support section and the hip support section.

[0011] Furthermore, the length of the transition section is 15-20mm, and the cross-sectional diameter of the transition section gradually changes linearly along its extension direction.

[0012] Furthermore, the side support structure also includes connecting sections, which are respectively located at the ends of the shoulder support section away from the waist support section and the ends of the hip support section away from the waist support section, and are fixed to the surface of the skeleton body.

[0013] An embodiment of the present invention provides a seat, including the backrest frame described above.

[0014] An embodiment of the present invention provides an automobile including the aforementioned seat.

[0015] The beneficial effects of this invention are: The present invention provides a backrest frame with a side wing support structure that extends in a spiral shape. This structure has a larger contact area and a higher degree of fit with the side wings of the human back, which can disperse local pressure and avoid excessive local compression. At the same time, the spirally extended side wing support structure has good elastic deformation capability and can achieve adaptive elastic support according to the pressure feedback of the driver's back, thus making up for the deficiency of insufficient local support in traditional structures.

[0016] The present invention provides a seat that adopts the aforementioned backrest frame, inheriting all the beneficial effects of the backrest frame. It can provide drivers and passengers with zoned adaptive side wing support that conforms to the physiological structure of the human body, effectively relieving driving fatigue and greatly improving the comfort and support of the seat.

[0017] The present invention provides a car that uses the above-mentioned seat, which inherits all the beneficial effects of the seat and can provide a more comfortable and fitting riding experience for drivers and passengers, effectively improving the driving comfort and product competitiveness of the car. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1This is a schematic diagram of the backrest frame provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure of the side wing support structure of the backrest frame provided in an embodiment of the present invention.

[0020] icon: 100 - Skeleton Body; 200 - Side support structure; 201 - Shoulder support section; 202 - Waist support section; 203 - Hip support section; 204 - Transition section; 205 - Connecting section. Detailed Implementation

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0024] Example 1 like Figures 1 to 2 As shown, the present invention provides a backrest frame for a seat, including a frame body 100 and a side wing support structure 200. The side wing support structure 200 is located on the side of the frame body 100 facing the driver and passengers, and the side wing support structure 200 extends in a spiral shape along the length of the frame body 100.

[0025] In this embodiment, the side wing support structure 200 extends in a spiral shape, which has a larger contact area and a higher degree of fit with the side wing of the human back, which can disperse local pressure and avoid excessive local compression; at the same time, the spirally extended side wing support structure has good elastic deformation capability, which can achieve adaptive elastic support according to the pressure feedback of the driver's back, making up for the deficiency of insufficient local support force in traditional structures.

[0026] The side support structure 200 is fixed to the side of the frame body 100 facing the driver and passenger, directly acting on the side wings of the human back. This provides more direct support force transmission, improving the effectiveness and immediacy of the support. Multiple side support structures 200 can be arranged laterally at intervals along the frame body 100. That is, there must be at least one side support structure 200. When there is only one side support structure 200, it can be directly arranged on the side of the frame body 100 facing the door. If there are two side support structures 200, they can be arranged symmetrically at both ends of the frame body 100. If there are multiple side support structures 200, they can be arranged laterally at intervals along the frame body 100. This allows for targeted zoned support for the left and right sides of the human back, adapting to the physiological structure of the human back and improving driving and riding comfort.

[0027] Preferably, the side wing support structure 200 is made of spring steel, which has both high strength and good elasticity. It is reliably connected to the frame body 100 by welding, ensuring the durability of the backrest frame and meeting the long-term use requirements of car seats.

[0028] The backrest frame includes a frame body 100 and side support structures 200. The frame body 100 adopts a conventional metal stamping structure for automotive seat backrests, made of high-strength cold-rolled steel plate, possessing sufficient structural strength and resistance to deformation, providing basic support for the back of the driver and passenger. Its side facing the driver and passenger is an arc-shaped structure that conforms to the curve of the human back. The side support structure 200 is integrally formed from high-strength spring steel and is fixed to the arc-shaped side of the frame body 100 facing the driver and passenger by welding. The side support structure 200 extends in a continuous spiral along the length direction of the frame body 100 (i.e., the vertical extension direction of the human back), and the direction of the spiral is adapted to the physiological curve of the side wings of the human back. In this embodiment, two side wing support structures 200 are provided. The two side wing support structures 200 are arranged at intervals along the side of the frame body 100 facing the door to the opposite side (i.e., the left and right lateral directions of the frame body 100), respectively corresponding to the left and right side wing positions of the human back. The spiral extension trajectory of the two side wing support structures 200 is symmetrically distributed, which matches the support requirements of the left and right side wings of the human back.

[0029] According to one embodiment provided by the present invention, such as Figure 1 and Figure 2 As shown, the side wing support structure 200 is a multi-segment structure, and at least two segments have different helical curvature radii and cross-sectional diameters.

[0030] In this embodiment, the side support structure 200 is a multi-segment structure, and at least two segments have different helical curvature radii and cross-sectional diameters. The structural parameters of each segment are designed differently according to the pressure requirements of different side regions of the human back, so that the support stiffness and elastic deformation capacity of each segment are different.

[0031] The 200 side support structure adopts a multi-segment design, with differentiated spiral curvature radius and cross-sectional diameter of each segment. It can accurately match the support performance according to the pressure requirements of different side areas of the human back, and achieve zoned adaptive support. This solves the problem that the traditional one-piece side wire support has a single performance and cannot adapt to the needs of different areas of the human body.

[0032] The 200 segments of the side support structure provided in this embodiment utilize a spiral variable-diameter structure to provide differentiated support based on the varying pressure requirements of the shoulders, waist, and hips, effectively alleviating concentrated local pressure. Optimized for human compatibility, the spiral curvature radius of each segment precisely matches the physiological curve of the human body, enhancing the fit to the back and making it suitable for drivers and passengers of different body types with excellent compatibility. Testing showed a 45% improvement in the uniformity of pressure distribution across the back areas of drivers and passengers, and a significant reduction in lower back fatigue after 3 hours of continuous driving. The uniform pressure distribution and the design that conforms to the body's curves prevent poor blood circulation caused by prolonged localized pressure, reducing the risk of sub-health conditions such as lower back pain and muscle stiffness caused by prolonged sitting. This provides proactive health protection, especially for drivers and passengers with lumbar spine problems or those who commute long distances. In addition to regular driving scenarios, the spiral variable-diameter structure can quickly respond to changes in lateral force during dynamic conditions such as rapid acceleration, sudden braking, or turning, providing dynamic support and reducing body sway. This is particularly suitable for high-frequency, long-duration use scenarios such as ride-hailing vehicles and trucks, further ensuring driving safety and stability.

[0033] The dual differentiated design of spiral curvature radius and cross-sectional diameter allows for flexible adjustment of the support stiffness of each segment. The smaller the curvature radius and the larger the cross-sectional diameter, the stronger the support stiffness, providing stronger support for areas of the back under greater pressure. Conversely, the support is softer and adaptable to areas under less pressure, further avoiding insufficient local support or excessive compression.

[0034] According to one embodiment provided by the present invention, such as Figure 1 and Figure 2 As shown, the side support structure 200 includes a shoulder support section 201, a waist support section 202 and a hip support section 203 connected in sequence. The spiral curvature radii of the shoulder support segment 201, waist support segment 202, and hip support segment 203 vary in a gradient manner.

[0035] In this embodiment, the lateral support structure 200 includes a shoulder support segment 201, a waist support segment 202, and a hip support segment 203 connected in sequence. The helical curvature radii of the shoulder support segment 201, waist support segment 202, and hip support segment 203 exhibit a gradient change. The shoulder support segment 201 corresponds to the shoulder lateral region of the human back, the waist support segment 202 corresponds to the waist lateral region of the human back, and the hip support segment 203 corresponds to the upper lateral region of the human buttocks. The three segments are connected sequentially from top to bottom along the length of the skeleton body 100 and transition smoothly. In this embodiment, the helical curvature radius exhibits a gradient change, first decreasing and then increasing, that is, the helical curvature radius of the shoulder support segment 201 is greater than that of the waist support segment 202, and the helical curvature radius of the hip support segment 203 is greater than that of the waist support segment 202, adapting to the physiological characteristics of the human body where the waist lateral region is the main stress area and the shoulder and hip lateral regions are secondary stress areas. The side support structure 200 is segmented according to the physiological regions of the human back, namely the shoulder, waist, and hip sides. This design of the support structure closely matches the physiological structure of the human body, achieving precise zoned support for the sides of the human back and greatly improving the fit and comfort of the support.

[0036] Correspondingly, the spiral curvature radii of the shoulder support section 201, lumbar support section 202, and hip support section 203 exhibit a gradient change. A smaller curvature radius is designed specifically for the lumbar side, which bears the primary force. This makes the spiral structure of the lumbar support section 202 more compact and the elastic support more concentrated, providing stronger lateral support and relief for the lumbar region. This effectively alleviates lumbar fatigue during driving and is tailored to the force requirements of the lumbar region while driving. The shoulder support section 201 and hip support section 203 feature larger spiral curvature radii, making the support structure in these areas more expansive and the elastic deformation gentler. This avoids excessive compression of the shoulder and hip sides while ensuring sufficient space for movement, balancing support and flexibility.

[0037] According to one embodiment provided by the present invention, such as Figure 1 and Figure 2 As shown, the cross-sectional diameters of the shoulder support section 201, the waist support section 202, and the hip support section 203 vary in a gradient.

[0038] In this embodiment, the cross-sectional diameters of the shoulder support segment 201, waist support segment 202, and hip support segment 203 exhibit a gradient change. Specifically, the cross-sectional diameter first increases and then decreases; that is, the cross-sectional diameter of the waist support segment 202 is larger than that of the shoulder support segment 201, and the cross-sectional diameter of the waist support segment 202 is larger than that of the hip support segment 203. This, combined with the gradient change in the helical curvature radius, further enhances the differentiated support performance of each segment. Each segment has a circular cross-section, and a cold-drawing process ensures the accuracy of the cross-sectional dimensions. The cross-sectional diameters of the three segments transition smoothly without obvious steps, avoiding stress concentration.

[0039] The combination of cross-sectional diameter and helical curvature radius achieves a dual gradient change, enabling more precise control of the support stiffness of each segment. This allows the lumbar support segment 202 to possess both a small curvature radius and a large cross-sectional diameter, maximizing support stiffness and providing stronger support and wrapping force for the lumbar flanks. This perfectly matches the main stress requirements of the lumbar region during driving and effectively prevents lumbar tilting. The shoulder support segment 201 and hip support segment 203 use smaller cross-sectional diameters combined with large curvature radii, resulting in a softer support stiffness. While providing basic support, they ensure freedom of movement for the shoulders and hips, avoiding discomfort caused by excessive support. The smooth transition of cross-sectional diameters across each segment ensures the structural continuity of the side support structure 200, avoiding stress concentration points, improving the structure's fatigue resistance and service life, and meeting the requirements of long-term, frequent use of car seats. The circular cross-sectional design ensures uniform elastic deformation capacity of the side support structure 200, with surface contact rather than point contact with the back of the user, further dispersing local pressure and improving contact comfort.

[0040] According to one embodiment provided by the present invention, such as Figure 1 and Figure 2 As shown, the spiral curvature radius of the shoulder support section 201 is 8-10mm, the spiral curvature radius of the waist support section 202 is 4-6mm, and the spiral curvature radius of the hip support section 203 is 12-15mm. The cross-sectional diameter of the shoulder support section 201 is 3.0-3.5mm, the cross-sectional diameter of the waist support section 202 is 4.0-4.5mm, and the cross-sectional diameter of the hip support section 203 is 3.5-4.0mm.

[0041] In this embodiment, preferably, the shoulder support segment 201 has a spiral curvature radius of 9mm and a cross-sectional diameter of 3.2mm; the waist support segment 202 has a spiral curvature radius of 5mm and a cross-sectional diameter of 4.2mm; and the hip support segment 203 has a spiral curvature radius of 13mm and a cross-sectional diameter of 3.8mm. The dimensional parameters of each segment were determined through extensive ergonomic testing and mechanical simulation to suit the back flank dimensions and stress characteristics of most adults.

[0042] In other words, the backrest frame provided in this embodiment provides specific numerical ranges and preferred values ​​for the helical curvature radius and cross-sectional diameter of each segment of the side wing support structure 200. This makes the backrest frame design clearly implementable, facilitating dimensional control and process adjustment in industrial production, and reducing production difficulty and cost. The specific numerical ranges are determined based on ergonomic experiments and mechanical simulations, and can adapt to the physiological characteristics and driving force requirements of most adults, possessing wide applicability and applicable to the front and rear seats of different car models. The preferred values ​​are the optimal matching values ​​for the support performance of each segment, which can ensure support stiffness while maximizing the elastic deformation capacity of the side wing support structure 200, achieving a perfect balance between support and comfort, and significantly improving the driving experience.

[0043] According to one embodiment provided by the present invention, such as Figure 1 and Figure 2 As shown, the wing support structure 200 also includes a transition section 204; A transition section 204 is provided between the shoulder support section 201 and the waist support section 202, and between the waist support section 202 and the hip support section 203.

[0044] In this embodiment, transition sections 204 are provided between the shoulder support section 201 and the waist support section 202, and between the waist support section 202 and the hip support section 203. The transition sections 204 are integrally formed with the adjacent support sections, and their helical curvature radius and cross-sectional diameter are smoothly transitioned along the extension direction. The section connecting the shoulder support section 201 and the waist support section 202 is the first transition section 204, and the section connecting the waist support section 202 and the hip support section 203 is the second transition section 204. The two transition sections 204 are respectively provided on the upper and lower sides of the middle part of the side support structure 200, adapting to the physiological curve transition areas of the human back, shoulders and waist, and waist and hip.

[0045] Transition sections 204 are incorporated between the support segments to smooth the gradient changes in the helical curvature radius and cross-sectional diameter, preventing stress concentration caused by direct connections between support segments. This enhances the overall structural strength and fatigue resistance of the side support structure 200, extending its service life. The transition sections 204 adapt to the curved transition areas of different physiological regions of the human back, resulting in a higher degree of fit between the side support structure 200 and the human back. This prevents support gaps or localized compression at transition points, further improving the continuity and comfort of the support.

[0046] The transition section 204 makes the elastic deformation of the side support structure 200 uniform. When pressure is applied to the back of the human body, the deformation can be evenly transmitted to each support section through the transition section 204, avoiding structural damage caused by excessive local deformation and improving the stability of the support structure.

[0047] According to one embodiment provided by the present invention, such as Figure 1 and Figure 2 As shown, the length of the transition section 204 is 15-20mm, and the cross-sectional diameter of the transition section 204 changes linearly along its extension direction.

[0048] In this embodiment, preferably, the length of the transition segment 204 is 18 mm. The cross-sectional diameter of the first transition segment 204 linearly changes from 3.2 mm at the shoulder support segment 201 to 4.2 mm at the waist support segment 202, and the cross-sectional diameter of the second transition segment 204 linearly changes from 4.2 mm at the waist support segment 202 to 3.8 mm at the hip support segment 203. The helical curvature radius of the transition segment 204 also linearly changes along the extension direction, which, in conjunction with the linear change in the cross-sectional diameter, ensures a linear change in the support stiffness of the transition segment 204.

[0049] The length of the transition section 204 is limited to 15-20mm. This length range has been verified through mechanical testing. It ensures a smooth transition in the radius of curvature and cross-sectional diameter, while preventing the distribution of support force due to excessive length, thus guaranteeing the support effectiveness of each support section. The cross-sectional diameter of the transition section 204 changes linearly along the extension direction. Combined with the linear change in the helical radius of curvature, this results in a linear change in the support stiffness of the transition section 204, achieving a seamless connection in support performance between each support section and avoiding driving discomfort caused by abrupt changes in support stiffness. The linearly gradual structural design makes the stress distribution of the transition section 204 more uniform, significantly reducing the risk of stress concentration and improving the overall deformation resistance and service life of the side wing support structure 200.

[0050] According to one embodiment provided by the present invention, such as Figure 1 and Figure 2 As shown, the side wing support structure 200 also includes a connecting section 205, which is respectively located at the end of the shoulder support section 201 away from the waist support section 202 and the end of the hip support section 203 away from the waist support section 202, and is fixed to the surface of the skeleton body 100.

[0051] In this embodiment, the side wing support structure 200 further includes connecting sections 205. Connecting sections 205 are respectively located at the ends of the shoulder support section 201 and the hip support section 203 opposite to the waist support section 202, and are fixed to the surface of the frame body 100. The connecting sections 205 are made of the same spring steel as the side wing support structure 200 and are integrally formed with each support section. The connecting section 205 is a straight rod structure, and its cross-sectional diameter is larger than that of the adjacent support section, preferably 5mm, to improve the structural strength of the connecting section 205. The connecting section 205 is fixed to the surface of the frame body 100 by spot welding to ensure reliable connection. Furthermore, the contact surface between the connecting section 205 and the frame body 100 is planar, increasing the contact area and further improving the fixing effect. The connecting segment 205 at the top of the shoulder support segment 201 extends along the horizontal direction of the skeleton body 100 and is fixed to the upper region of the skeleton body 100. The connecting segment 205 at the bottom of the hip support segment 203 extends along the horizontal direction of the skeleton body 100 and is fixed to the lower region of the skeleton body 100.

[0052] Connecting sections 205 are provided at the upper and lower ends of the side wing support structure 200, and are fixed to the frame body 100 through the connecting sections 205. Compared with directly fixing the end of the support section to the frame body 100, this increases the contact area and welding area, making the fixation more reliable and preventing the weld joints from falling off due to frequent elastic deformation of the side wing support structure 200, thus improving the structural stability of the backrest frame. The connecting section 205 is designed as a straight rod structure with an increased cross-sectional diameter, which improves the structural strength of the connecting section 205 and can effectively withstand the tensile and torsional forces generated when the side wing support structure 200 deforms, ensuring the deformation resistance of the fixed parts.

[0053] The connecting segment 205 extends horizontally along the frame body 100 and is fixed to the upper and lower sides of the frame body 100. This allows the force of the side wing support structure 200 to be evenly distributed to the overall structure of the frame body 100, preventing excessive local stress that could cause deformation of the frame body 100 and improving the overall structural strength of the backrest frame. The connecting segment 205 and the side wing support structure 200 are integrally molded, eliminating the need for additional connectors, simplifying the manufacturing process, reducing production costs, and ensuring structural integrity while avoiding assembly errors caused by connectors.

[0054] Example 2 The present invention provides a seat, including the backrest frame described above.

[0055] In this embodiment, the seat includes the aforementioned backrest frame. It also includes a seat cushion frame, a foam layer, a surface layer, a headrest structure, and an adjustment mechanism. The foam layer covers the outer sides of the backrest frame and seat cushion frame, the surface layer covers the outer side of the foam layer, the headrest structure is located at the top of the backrest frame, and the adjustment mechanism is connected to the backrest frame and seat cushion frame to allow for backrest angle adjustment. The foam layer is made of polyurethane foam, and the area corresponding to the side wing support structure 200 is thinned to effectively transmit the elastic support force of the side wing support structure 200 to the back of the user. The surface layer is made of leather or fabric to ensure the seat's feel and breathability.

[0056] The seat uses the aforementioned backrest frame, inheriting all the beneficial effects of the backrest frame. It can provide drivers and passengers with zoned adaptive side wing support that conforms to the human physiological structure, effectively relieving driving fatigue and greatly improving the comfort and support of the seat.

[0057] The foam layer is thinned in the area corresponding to the side wing support structure 200 to ensure effective transmission of the elastic support force of the side wing support structure 200. This avoids the support force attenuation caused by an excessively thick foam layer, making the side wing support effect more obvious. The backrest frame adapts well to other structures of the seat, and the adjustment mechanism allows for flexible adjustment of the backrest angle. During adjustment, the side wing support structure 200 always maintains a good fit with the human back, balancing support and adjustment flexibility.

[0058] The overall seat design takes into account comfort, reliability, and practicality. The components work together to ensure the structural strength and service life of the seat, while also improving the user experience for drivers and passengers, thus meeting the needs of car seat use.

[0059] Example 3 The present invention provides an automobile including the aforementioned seat.

[0060] In this embodiment, the vehicle can be of various models, such as a sedan, various types of freight trucks, or various types of buses, including the aforementioned seats. These seats are installed inside the vehicle as the driver's seat, front passenger seat, or rear seat, and the seat's mounting bracket is connected to the vehicle's floor. The seat's installation position conforms to the vehicle's ergonomic design, ensuring ample seating space and ease of operation for the occupants.

[0061] The car uses the aforementioned seats, which inherit all the beneficial effects of seats, providing a more comfortable and supportive riding experience for drivers and passengers, and effectively improving the car's driving comfort and product competitiveness.

[0062] The seat's installation position and adjustment method are compatible with the car body and central control system, offering convenient operation and complementing the overall design style of the vehicle, enhancing the integrity and practicality of the interior. The backrest frame boasts excellent structural strength and durability, capable of withstanding various driving conditions (such as bumps and cornering), providing stable support for passengers and improving ride safety during driving. The seat's design offers broad adaptability, allowing it to be used in different positions within the car without significant design modifications, reducing production and modification costs and improving production efficiency.

[0063] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A backrest frame for a seat, characterized in that, It includes the main skeleton (100) and the side support structure (200); The side wing support structure (200) is located on the side of the frame body (100) facing the driver and passengers, and the side wing support structure (200) extends in a spiral shape along the length direction of the frame body (100).

2. The backrest frame according to claim 1, characterized in that, The side wing support structure (200) is a multi-segment structure, and at least two segments have different helical curvature radii and cross-sectional diameters.

3. The backrest frame according to claim 2, characterized in that, The side support structure (200) includes a shoulder support section (201), a waist support section (202) and a hip support section (203) connected in sequence. The spiral curvature radii of the shoulder support segment (201), the waist support segment (202), and the hip support segment (203) vary in a gradient.

4. The backrest frame according to claim 3, characterized in that, The cross-sectional diameters of the shoulder support section (201), the waist support section (202), and the hip support section (203) vary in a gradient.

5. The backrest frame according to claim 4, characterized in that, The spiral curvature radius of the shoulder support section (201) is 8-10 mm, the spiral curvature radius of the waist support section (202) is 4-6 mm, and the spiral curvature radius of the hip support section (203) is 12-15 mm. The shoulder support section (201) has a cross-sectional diameter of 3.0-3.5 mm, the waist support section (202) has a cross-sectional diameter of 4.0-4.5 mm, and the hip support section (203) has a cross-sectional diameter of 3.5-4.0 mm.

6. The backrest frame according to claim 4, characterized in that, The wing support structure (200) also includes a transition section (204); The transition section (204) is provided between the shoulder support section (201) and the waist support section (202), and between the waist support section (202) and the hip support section (203).

7. The backrest frame according to claim 6, characterized in that, The length of the transition section (204) is 15-20mm, and the cross-sectional diameter of the transition section (204) gradually changes linearly along its extension direction.

8. The backrest frame according to claim 3, characterized in that, The side support structure (200) further includes a connecting section (205), which is respectively located at the end of the shoulder support section (201) away from the waist support section (202) and the end of the hip support section (203) away from the waist support section (202), and is fixed to the surface of the skeleton body (100).

9. A type of seat, characterized in that, Includes the backrest frame as described in any one of claims 1-8.

10. A car, characterized in that, Includes the seat as described in claim 9.

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