Seat back and vehicle seat

Abstract

The application relates to a seat backrest and an automobile seat, and relates to the technical field of seats. The seat backrest comprises a mounting base and a plurality of module cushion bodies. The plurality of module cushion bodies are mounted on the mounting base and are combined to form an overall backrest supporting structure. At least one of the module cushion bodies is provided with a first connecting portion and a second connecting portion. The first connecting portion is connected to the mounting base in a rotatable manner, and the second connecting portion is connected to the mounting base in an elastic manner. The structure enables the module cushion body to swing at a certain angle relative to the mounting base when subjected to external force, and to realize deformation and recovery in a certain direction under the elastic connection. Through the collaborative design of the rotatable connection and the elastic connection, the backrest has a certain degree of self-adaptability and buffering capacity for the pressure on the human back, and the seat backrest can better fit the curves of different human bodies.

Description

Technical Field

[0001] This application relates to the field of seating technology, and more particularly to a seat back and a car seat. Background Technology

[0002] Currently, seat backrests mainly consist of a frame, foam, and covering. The foam is installed on the frame, and the covering wraps around the entire frame and foam to form the seat backrest. However, the fit of a seat backrest to the human back mainly relies on the ergonomic design of the seat backrest and the deformation of the foam, which does not allow the seat backrest to better conform to the curves of different human bodies. Utility Model Content

[0003] This application provides a seat backrest and a car seat, which are intended to at least partially solve the above-mentioned technical problems.

[0004] To achieve the above objectives, in a first aspect, this application provides a seat backrest, comprising:

[0005] Install basic components;

[0006] Multiple modular pads are mounted on the mounting base, and the multiple modular pads are combined to form a backrest support;

[0007] At least one of the module pads has a first connecting portion and a second connecting portion, wherein the first connecting portion is rotatably connected to the mounting base component, and the second connecting portion is elastically connected to the mounting base component.

[0008] Optionally, at least one of the module pads includes a first support portion and a second support portion;

[0009] The first support extends along a first direction, and the second support extends along a second direction, wherein the first direction and the second direction are not parallel.

[0010] Optionally, the first connecting portion is located at the junction of the first supporting portion and the second supporting portion.

[0011] Optionally, the second connecting portion is located on the side of the first support portion facing the mounting base.

[0012] Optionally, the second connecting portion is located on the side of the second support portion facing the mounting base.

[0013] Optionally, the first connecting portion is located at the edge of the first support portion away from the central axis of the mounting base, and the second connecting portion is located at the edge of the second support portion close to the central axis of the mounting base.

[0014] Optionally, the seat back also includes a rotating connector, through which the first connecting part is connected to the mounting base.

[0015] Optionally, the rotating connector includes a first rotating part and a second rotating part, the first rotating part is fixed to the first connecting part, the second rotating part is fixed to the mounting base, and the first rotating part and the second rotating part can rotate relative to each other.

[0016] Optionally, the seat back also includes an elastic connector, through which the second connecting portion is connected to the mounting base.

[0017] Optionally, the elastic connector includes a first pressure plate, a second pressure plate, and an elastic part. The first pressure plate is fixed to the second connecting part, the second pressure plate is fixed to the mounting base, and the elastic part is connected between the first pressure plate and the second pressure plate.

[0018] Optionally, when the second connecting portion is located on the side of the first support portion facing the mounting base, the elastic portion is a tension spring.

[0019] Optionally, when the second connecting portion is located on the side of the second support portion facing the mounting base, the elastic portion is a compression spring.

[0020] Optionally, the mounting base includes a base plate and a frame, the base plate is disposed on the frame, and a plurality of module pads are disposed on at least one of the base plate or the frame.

[0021] Secondly, this application also provides an automobile seat, including the seat back of the first aspect.

[0022] In this embodiment of the seat backrest, multiple modular pads are detachably mounted on the mounting base to form a partitioned backrest support structure, which improves the fit and comfort of the seat back area. Each modular pad has at least one first connecting part and at least one second connecting part, and is connected to the mounting base by rotational connection and elastic connection, respectively. This allows the modular pad to adjust its position under localized force applied by the occupant's back, such as slight rotation, deformation, or movement, thereby achieving dynamic adaptation to different body shapes or postures and exhibiting strong self-adaptive capabilities. Through the modular arrangement, modular pads can be set for key areas of the human body such as the waist, neck, and left and right backs, improving structural fit and localized support performance to a certain extent. The mounting base adopts a modular interface design, which is compatible with different models of modular pads, giving the seat backrest structure greater scalability and versatility. This facilitates rapid adaptation to different vehicle models, reducing initial design and mold development costs, improving seat manufacturing and repair efficiency, and further enhancing the product's market flexibility and production economy.

[0023] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0026] Figure 1 A schematic diagram of the seat back structure in an embodiment of this application is shown;

[0027] Figure 2 An exploded schematic diagram of a portion of the seat backrest in an embodiment of this application is shown.

[0028] Figure 3 A schematic diagram of the seat back structure in an embodiment of this application is shown;

[0029] Figure 4 This illustration shows a structure in which multiple seat backrests are mounted on a base plate in an embodiment of this application. Figure 1 ;

[0030] Figure 5 This illustration shows a structure in which multiple seat backrests are mounted on a base plate in an embodiment of this application. Figure 2 ;

[0031] Figure 6 This illustration shows a structure in which multiple seat backrests are mounted on a base plate in an embodiment of this application. Figure 3 ;

[0032] Figure 7 A schematic diagram of the rotating connector and the elastic connector in an embodiment of this application is shown.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Module pad; 11. First connecting part; 12. Second connecting part; 13. First supporting part; 14. Second supporting part;

[0035] 2. Rotating connector; 21. First rotating part; 22. Second rotating part;

[0036] 3. Elastic connector; 31. First pressure plate; 32. Second pressure plate; 33. Elastic part;

[0037] 4. Installation base components; 41. Base plate; 42. Frame. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0039] This application provides a seat backrest; please refer to [link / reference]. Figures 1 to 4 The seat back includes a mounting base 4 and multiple modular pads 1. The mounting base 4 may specifically include a frame 42 for structural support and a base plate 41 for fixing the modular pads 1; these can be an integral or separate structure. The multiple modular pads 1 are detachably mounted on the mounting base 4, and the multiple modular pads 1 are combined to form a complete backrest support area. Each modular pad 1 has at least one first connecting part 11 and at least one second connecting part 12. The first connecting part 11 is rotatably connected to the mounting base 4, and the second connecting part 12 is elastically connected to the mounting base 4. The rotatable connection can include a pivot connection, hinge connection, ball joint connection, etc., while the elastic connection can be a compression spring, tension spring, or other structure with a certain elastic deformation capability, allowing the modular pad 1 to undergo controllable displacement or deformation relative to the mounting base 4 under external force.

[0040] Understandably, to enhance the adaptability of the seat back to the back contours of users of different body types, the modular pads 1 are arranged according to the principle of zoning. For example, the left modular pad 1 is set in the left area, the right modular pad 1 in the right area, the lumbar modular pad 1 in the lumbar area, and the neck modular pad 1 in the neck area. Each modular pad 1 is designed to fit different parts of the back. The shape, thickness, and material of the modular pad 1 can be customized according to the human body area it is adapted to. For example, the lumbar module can be designed with a raised center and slightly thinner edges to adapt to the natural forward curve of the lumbar spine, while the neck module can be designed with an arc-shaped indentation to adapt to the lower edge curve of the cervical spine.

[0041] Therefore, when a passenger leans against the seat back, the force on different parts of the back will vary. Under the localized force on the back, the modular cushion 1 undergoes a recoverable deformation micro-adjustment movement through the rotational connection between the first connecting part 11 and the mounting base 4, and the elastic connection between the second connecting part 12 and the mounting base 4. This can result in structural responses such as rotation, offset, sinking, or localized lifting, allowing the modular cushion 1 to conform to the back force curve at a microscopic level. Since the modular cushion 1 is a modular structure, each module responds relatively independently and does not interfere with each other, exhibiting good localized conformity performance, which is beneficial to improving riding comfort. It can be understood that the elastic connection between the second connecting part 12 and the mounting base 4 can be set with an elastic buffer, a limiting device, or a return mechanism, allowing the modular cushion 1 to move within a certain range while possessing recovery capability and stability control, preventing structural instability caused by excessive range of motion.

[0042] It is understandable that when a user's back rests against the modular cushion 1, the modular cushion 1 experiences localized pressure due to contact with the human body. If this pressure acts on the first connecting part 11, since this position is a rotating connection area, the modular cushion 1 can undergo angular displacement around the rotating connecting part 2, causing the modular cushion 1 to rotate and deform along the direction of force on the user's back, thereby forming a fit to the contour of the user's back. If the force acts on the second connecting part 12, since the elastic connection area has elastic displacement capability, the modular cushion 1 can undergo linear displacement in this area, forming a translational response of the modular cushion 1 relative to the substrate, thereby adjusting the matching relationship between the surface contour of the cushion and the user's back. Therefore, it is beneficial to enhance the dynamic adaptability of the seat back while keeping the structure simple. The modular cushion 1 provides differentiated feedback to the force response in different directions through two different types of connection structures, so that the seat back not only has the ability to bend and deform, but also the ability to adjust displacement, thereby improving the overall structural response flexibility while meeting the needs of multi-angle fit. In terms of arrangement, the first connecting part 11 and the second connecting part 12 can be respectively set on the opposite side, the upper and lower parts, or one in front and one behind of the module pad body 1 in different positions to adapt to the different characteristics of the curve of the human back and the pressure distribution.

[0043] Furthermore, combined Figure 1 , Figure 2 The mounting base 4 includes a base plate 41 and a frame 42. The base plate 41 is mounted on the frame 42, and the seat back is mounted on at least one of the base plate 41 or the frame 42. The base plate 41 serves as the mounting base for multiple module pads 1, while the frame 42 serves as the supporting base for the base plate 41, thus ensuring the safety and stability of the entire seat back.

[0044] For example, the mounting base 4 can adopt a modular design, featuring connection interfaces compatible with various models of the module pad 1, allowing for replaceable installation of the module pad 1. This design demonstrates excellent compatibility and versatility in the context of rapid iteration and updates to vehicle platforms. Automakers can customize or replace the module pad 1 according to different vehicle models or user needs without completely replacing the structure of the mounting base 4, thereby saving on initial design and development costs for the seat back and accelerating product launch cycles. Simultaneously, the standardized configuration of the module pad 1 also facilitates mass production and warehouse management for manufacturers, reducing the variety of spare parts and inventory pressure, and improving production and service efficiency.

[0045] It should be noted that the substrate 41 and the frame 42 may take the form of a metal frame, an injection-molded base, or a composite material plate, and possess structural strength to support the module pad 1. Combined with Figure 1 , Figure 2 Specifically, the mounting base 4 may consist only of the substrate 41; or, a portion of the mounting base 4 may be the substrate 41 and the other portion may be the frame 42.

[0046] Meanwhile, the arrangement of the first connecting part 11 and the second connecting part 12 is not limited to a symmetrical arrangement. Their arrangement on the module pad 1 can be flexibly set according to the structural form and ergonomic parameters of the mounting base 4. For example, the first connecting part 11 is located at the upper edge of the module pad 1 and forms a movable connection with the crossbeam of the frame 42 of the mounting base 4. The second connecting part 12 is located at the lower edge or side edge of the module pad 1 and is used to connect with the longitudinal support surface of the substrate 41 so that the module pad 1 has a limited degree of rotation freedom in the vertical or horizontal direction, thereby adapting to the dynamic back-fitting requirements.

[0047] In summary, through the above-mentioned seat back structure, multiple modular pads 1 are movably connected to the mounting base 4 via the first connecting part 11 and the second connecting part 12, forming a human body conforming surface that can respond to different areas. It has good local conforming ability, structural adjustability and manufacturing versatility, which improves seat comfort, reduces production costs and enhances product adaptability to a certain extent, reflecting the modular, intelligent and highly adaptable design concept of the seat back structure.

[0048] In some implementations, combined with Figure 3 , Figure 4 The modular cushion 1 includes a first support portion 13 and a second support portion 14. The first support portion 13 extends along a first direction, and the second support portion 14 extends along a second direction. The first and second directions are not parallel; for example, they can be arranged at a certain angle to form a V-shaped cross-sectional profile. This V-shaped structure causes the modular cushion 1 to taper in the thickness direction, and the first support portion 13 and the second support portion 14 form a relatively recessed joint area at their junction. This joint area is provided with a movable connection structure for connecting the base plate 41 or frame 42 of the seat back. This connection at this location helps to create a good rotational response space when the user sits on it.

[0049] It is understandable that when a user's back contacts the seat back, the pressure applied to the modular cushion 1 is distributed across different areas of the user's back to the first support 13 and the second support 14. Because the first support 13 and the second support 14 are distributed in different directions, the modular cushion 1, under pressure, will exhibit a concentrated deformation tendency in the direction of the resultant force at the junction area. This area is precisely where the movable connector is located, and the movable connector allows this junction area to rotate around a rotation axis. Therefore, under pressure, the modular cushion 1 can deflect at the bottom junction of the V-shaped structure, thereby guiding the entire modular cushion 1 to appropriately shift or rotate along the back pressure direction, forming a contact interface that more closely conforms to the contour of the user's back.

[0050] It is worth noting that the angle between the first direction and the second direction is not fixed. It can be designed differently according to the installation position and function of different seat backs. For example, for seat backs arranged on the left and right, the angle of the support part can be set to converge towards the center. When the user lies down, the left and right module pads 1 can generate a synchronous deflection trend through the V-shaped structure, forming a wrap-around shape to fit the two sides of the human back, thereby improving the cooperative fit between the left and right module pads 1.

[0051] In the structural explanation, "first support part 13" and "second support part 14" refer to two parts on the module pad 1 that extend in different directions and respectively constitute the main deformation and load-bearing surfaces of the pad, and are not limited to specific materials or connection methods; "non-parallel" means that there is an angle relationship between the two directions, which can be an acute angle, a right angle, or an obtuse angle structure to form a three-dimensional cross section. "Intersection" is the structural center where the first support part 13 and the second support part 14 meet, and can be designed as an arc surface, a wedge shape, a concave surface, or a smooth transition surface.

[0052] Through the above structural configuration, the modular cushion 1 possesses a V-shaped structural feature, with the bottom of the V-shape serving as the core of the movable connection. This provides rotational space during localized deformation under stress, which is beneficial for adapting to complex curvature changes in the user's back. Simultaneously, it enhances the dynamic coordination between the two modular cushions 1, thereby improving the overall ergonomic adaptability and seating comfort of the backrest system. This design also gives the seat back a high degree of modular adaptability and flexibility, facilitating localized adjustments and optimized combinations on different seating platforms.

[0053] In some implementations, such as Figure 4 , Figure 5 As shown, the first connecting part 11 is disposed on the first support part 13, specifically at the junction of the first support part 13 and the second support part 14. Furthermore, the first connecting part 11 is rotatably connected to the mounting base 4, meaning the first connecting part 11 is configured and fixed to the rotating connector 2 on the mounting base 4, thus forming a rotating connection with a corresponding connection object on the seat structure. In this structure, the first support part 13 and the second support part 14 of the modular cushion 1 form a specific angle, making their junction a region of concentrated force. This junction, as a rotating connection point, facilitates the overall deflection of the modular cushion 1 around the rotating connector 2. Because the first connecting part 11 is disposed at the junction, it can guide the main support structure of the cushion to form a deflection trajectory around this point when the cushion is under overall force, thereby adjusting the surface orientation of the cushion to conform to the user's back in different postures. This configuration improves the adaptability of the modular cushion 1 to complex back curves during use and facilitates coordinated fit between multiple modules through corresponding rotation angles, enhancing support and comfort in different areas of the back. Meanwhile, the "junction area" refers to the naturally formed connection and transition area between the first support part 13 and the second support part 14 in terms of structure. It can be a right-angle turn or a curved surface connection, and is not limited to a specific geometric shape. The "fixed rotating connector 2" refers to a structural connection method that can provide rotational freedom, such as a pivot, hinge, or rotatable joint, with the aim of providing room for movement in a certain angular direction while maintaining a reliable connection. This embodiment achieves local shape adjustment function through structural arrangement, which is beneficial for the seat back to adapt to the usage needs of different users.

[0054] It is understood that the first connecting part 11 is located at the junction of the first support part 13 and the second support part 14, and is connected to the rotating connector 2, which provides the module pad 1 with the freedom to adjust its angle. The elastic connector 3 connected to the second connecting part 12 provides deformation recovery capability, so that the module pad 1 can return to its initial state after being deformed by pressure and the external force is removed.

[0055] Based on this, during use, when a user's back rests against the module pad 1, the module pad 1 will deflect at the rotation point defined by the first connecting part 11. Simultaneously, due to the cooperation between the second connecting part 12 and the elastic connector 3, offset or compression deformation will occur. After the user leaves the module pad 1, the elastic connector 3, based on its material properties, generates a rebound force, causing the second connecting part 12 to move the module pad 1 back to its initial preset posture. This structural configuration allows the module pad 1 to automatically restore its original shape after each use, facilitating repeated use by different users at different times and avoiding the impact of residual deformation on the fit during subsequent uses.

[0056] For example, combined Figure 4 , Figure 5 The second connecting part 12 can be located on the side of the first support part 13 facing the mounting base 4, or it can be located on the side of the second support part 14 facing the mounting base 4. In this application, the mounting base 4 refers to the support panel that constitutes the seat back structure, which can be a rigid plate, a composite material with a certain degree of elasticity, or a composite material combining rigidity and elasticity.

[0057] It is understandable that if the second connecting part 12 is located on the side of the first support part 13 facing the mounting base 4, a tension spring structure can be adopted. One end of the tension spring is connected to the first support part 13, and the other end is connected to the elastic or rigid area of ​​the mounting base 4. When the user's back applies pressure to the module pad 1, causing the module pad 1 to sink or deform locally, the tension spring will undergo tensile deformation at that position, storing deformation potential energy. When the user's back moves away from the module pad 1, the tension spring will contract under its own elastic recovery ability, thereby driving the module pad 1 to return to its initial position.

[0058] For example, when the second connecting part 12 is located on the side of the second support part 14 facing the mounting base 4, a compression spring structure can be used. One end of the compression spring is connected to the second support part 14, and the other end is connected to the mounting base 4. When the user applies pressure, the compression spring is compressed, storing elastic potential energy; when the user leaves, the compression spring extends due to its own elasticity, driving the module cushion 1 to pop out or rebound to its initial shape. This structural design allows the module cushion 1 to return to its initial design shape when not under force, which helps the seat maintain a consistent appearance when not in use, improving the product's visual neatness and functional integrity.

[0059] For example, combined Figure 6 The first connecting part 11 is located at the edge of the first support part 13 away from the central axis of the mounting base 4, and the second connecting part 12 is located at the edge of the second support part 14 close to the central axis of the mounting base 4.

[0060] In some embodiments, such as Figure 4 , Figure 7 As shown, the seat back also includes a rotating connector 2, through which the first connecting part 11 is connected to the mounting base 4. The rotating connector 2 further includes a first rotating part 21 and a second rotating part 22. The first rotating part 21 is fixed to the first connecting part 11, and the second rotating part 22 is fixed to the mounting base 4, and the two can rotate relative to each other. In the above structure, the "mounting base 4" usually refers to the frame 42 or base plate 41 used to support the module pad 1, providing a stable mounting reference surface; while the "rotating connector 2" refers to a structural device that allows relative rotation between two structures around a certain axis. The rotational engagement between the first rotating part 21 and the second rotating part 22 can be constructed using mechanical components such as pins, hinges, or ball joints.

[0061] The structural design of this embodiment allows the modular pad 1 to adjust its angle in a specific direction when in contact with the user's back and subjected to localized pressure, via the rotating connector 2. This angle change can be a rotation around the horizontal direction or an offset around the vertical direction, allowing the surface of the modular foam to adapt to changes in the posture of the back with a certain degree of freedom. Through relative rotation, the modular pad 1 can autonomously adjust its angle without affecting the structure of other components the moment the user leans against it, resulting in a higher degree of foam fit and thus reducing the problem of pressure concentration in different areas of the back to some extent. Furthermore, since each modular pad 1 can adopt a similar structure and be connected to the corresponding mounting base 4, the overall backrest system forms multiple relatively independent but collaborative support units, which is beneficial for providing a more suitable ergonomic support effect in usage scenarios for users of various body types.

[0062] By positioning the rotating connector 2 between the support plate and the mounting base 4, and having it comprise two rotating components respectively fixed to the connector and the base, the module gains a degree of angular adjustability relative to the overall seat structure. This design not only enhances user comfort but also facilitates quick assembly and disassembly during module maintenance and replacement, reducing usage and maintenance costs. Furthermore, the structure offers excellent scalability, allowing it to be combined with other types of connectors or additional adjustment mechanisms to achieve multi-directional adjustment of the backrest system, providing more flexible human-machine interface performance for the seat system.

[0063] In some implementations, such as Figure 4 , Figure 7As shown, the seat back also includes an elastic connector 3, which is used to elastically connect the second connecting part 12 to the mounting base 4. Specifically, the elastic connector 3 includes a first pressure plate 31, a second pressure plate 32, and an elastic part 33. The first pressure plate 31 is fixedly disposed on the second connecting part 12, the second pressure plate 32 is fixedly disposed on the mounting base 4, and the elastic part 33 is disposed between the first pressure plate 31 and the second pressure plate 32. The second connecting part 12 generally refers to the part disposed on the support plate of the module pad 1 and used to assist in the connection structure. It can be located at another position on the module pad 1 relative to the first connecting part 11. The mounting base 4 is generally the main frame or structural support component of the seat back, used to support the installation and force transmission of the entire module pad 1.

[0064] The elastic connector 3, especially the elastic part 33, in this structural design is beneficial for generating elastic displacement in a certain direction when the modular pad 1 is subjected to pressure from the user's back. This allows the foam to maintain a certain supporting force while providing cushioning capability. The elastic part 33 can be made of materials and structures with elastic recovery characteristics, such as compression springs, tension springs, elastic rubber pads, and corrugated sheets, to provide deformation under stress and return to its original position after unloading. This structure allows the modular pad 1 to obtain a certain degree of displacement freedom without the need for complex mechanical structures, thus more gently adapting to the back contour curve.

[0065] Furthermore, by fixing the first pressure plate 31 and the second pressure plate 32 to the second connecting part 12 and the mounting base 4 respectively, the elastic part 33 can be effectively clamped in the middle area, constructing a stable and effective elastic support structure. The first pressure plate 31 and the second pressure plate 32 are typically made of metal or high-strength engineering plastic to meet the requirements of connection strength and structural rigidity. The setting direction of the elastic connector 3 can be arranged along the front-back direction or the vertical direction of the module pad 1, thereby realizing the elastic response function to fit or downward stroke respectively. Compared with the rotating connector 2, the elastic connector 3 focuses on providing displacement buffering and support softening functions when the module cannot rotate, and is especially suitable for use in the backrest area where comfort needs to be improved or pressure-sensitive areas need to be used.

[0066] In summary, the seat backrest, by incorporating an elastic connector 3 between the second connecting part 12 and the mounting base 4, provides the modular cushion 1 with displacement response capability in a specific direction. This helps alleviate the instantaneous pressure experienced by the user when leaning against it, allowing the foam to better conform to the contours of the back, thereby improving seating comfort and user experience to a certain extent. Furthermore, compared to a purely rigid connection structure, this structure is more adaptable to the physiological curves of users of different body types, enhancing the ergonomic fit of the modular cushion 1. This structure also features easy assembly, a compact structure, and high reliability, making it suitable for widespread use in various types of seating platforms.

[0067] For example, when the second connecting portion 12 is located on the side of the first support portion 13 facing the mounting base 4, the elastic portion 33 is a tension spring; the tension spring can be stretched between the second connecting portion 12 and the mounting base 4, thereby providing a rebound force under external force. This structure is suitable for scenarios where the module needs to be displaced in the direction of stretching towards the mounting base 4, that is, the module will be pulled backward while the back is leaning down. During this process, the tension spring provides a buffer for the displacement stroke and drives the module pad 1 to return to the initial position after the pressure is released. The direction of the tension spring is usually consistent with the front-back direction of the module pad 1, which helps to reduce the concentration of back pressure and extend the stress area.

[0068] When the second connecting part 12 is located on the side of the second support part 14 facing the mounting base 4, the elastic part 33 adopts a compression spring. The compression spring is installed between the first pressure plate 31 and the second pressure plate 32 and is in a compressed state, suitable for application scenarios where the module pad 1 is compressed forward or inward after being subjected to force. During the pressing process, the compression spring of the module pad 1 is compressed, energy is stored, and a certain elastic restoring force is provided after the load is removed. This compression-type elastic response helps to enhance the buffering capacity of the module pad 1 against instantaneous impact loads, thereby improving the fatigue resistance and comfort adaptability of the structure to a certain extent.

[0069] The application of tension and compression springs in module pad 1 is configured based on the connection position and the difference in module deformation direction, making the elastic connection structure more in line with ergonomic requirements and structural stress characteristics. By flexibly selecting tension or compression springs for the elastic part 33, not only is the structure's adaptability to different stress modes improved, but also various forms of elastic support mechanisms can be constructed in the overall backrest structure. This elastic support mechanism can work together with the foam structure of the module itself to a certain extent, making the backrest fit the curve of the human back more closely, especially providing a more stable fit under dynamic seating conditions. In addition, the selection and stiffness parameters of tension and compression springs can be customized according to different vehicle models, seat areas, and passenger characteristics, thus providing a structural basis for the modularization and personalization of the seat system.

[0070] This structure features a clear structural composition and a well-defined response mechanism, which facilitates parameter simulation and mechanical optimization in engineering design. It also facilitates the rapid selection and installation of standard parts based on module positions during assembly and production, demonstrating good industrial implementation value and flexible adaptability.

[0071] Secondly, this application also provides an automobile seat, including a seat backrest as described in the first aspect.

[0072] In the description of this application, 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0073] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0074] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0075] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A seat backrest, characterized in that, include: Install the basic components (4); Multiple modular pads (1) are mounted on the mounting base (4), and the multiple modular pads (1) are combined to form a backrest support; At least one of the module pads (1) has a first connecting part (11) and a second connecting part (12), the first connecting part (11) being rotatably connected to the mounting base (4), and the second connecting part (12) being elastically connected to the mounting base (4).

2. The seat backrest according to claim 1, characterized in that, At least one of the module pads (1) includes a first support portion (13) and a second support portion (14); The first support portion (13) extends along a first direction, and the second support portion (14) extends along a second direction, wherein the first direction and the second direction are not parallel.

3. The seat backrest according to claim 2, characterized in that, The first connecting part (11) is located at the junction of the first supporting part (13) and the second supporting part (14).

4. The seat backrest according to claim 3, characterized in that, The second connecting part (12) is located on the side of the first support part (13) facing the mounting base (4).

5. The seat back according to claim 3, characterized in that, The second connecting part (12) is located on the side of the second support part (14) facing the mounting base (4).

6. The seat back according to claim 2, characterized in that, The first connecting part (11) is located at the edge of the first support part (13) away from the central axis of the mounting base (4), and the second connecting part (12) is located at the edge of the second support part (14) close to the central axis of the mounting base (4).

7. The seat backrest according to claim 1, characterized in that, The seat back also includes a rotating connector (2), and the first connecting part (11) is connected to the mounting base (4) through the rotating connector (2).

8. The seat back according to claim 7, characterized in that, The rotating connector (2) includes a first rotating part (21) and a second rotating part (22). The first rotating part (21) is fixed to the first connecting part (11), and the second rotating part (22) is fixed to the mounting base (4). The first rotating part (21) and the second rotating part (22) can rotate relative to each other.

9. The seat backrest according to claim 2, characterized in that, The seat back also includes an elastic connector (3), and the second connecting part (12) is connected to the mounting base (4) through the elastic connector (3).

10. The seat back according to claim 9, characterized in that, The elastic connector (3) includes a first pressure plate (31), a second pressure plate (32) and an elastic part (33). The first pressure plate (31) is fixed to the second connecting part (12), the second pressure plate (32) is fixed to the mounting base (4), and the elastic part (33) is connected between the first pressure plate (31) and the second pressure plate (32).

11. The seat back according to claim 10, characterized in that, When the second connecting part (12) is located on the side of the first support part (13) facing the mounting base (4), the elastic part (33) is a tension spring.

12. The seat backrest according to claim 10, characterized in that, When the second connecting part (12) is located on the side of the second support part (14) facing the mounting base (4), the elastic part (33) is a compression spring.

13. The seat back according to any one of claims 1 to 12, wherein the mounting base (4) comprises a base plate (41) and a frame (42), the base plate (41) being disposed on the frame (42), and a plurality of the module pads (1) being disposed on at least one of the base plate (41) or the frame (42).

14. A car seat, characterized in that, Includes a seat back as described in any one of claims 1 to 13.

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