Seat back, vehicle seat, and vehicle

Abstract

The application provides a seat backrest, an automobile seat and an automobile. The seat backrest comprises: a ventilation assembly; a plurality of backrest modules, which are combined to form a seat backrest support; wherein the ventilation assembly provides ventilation air flow for at least one backrest module, and at least one backrest module connected with the ventilation assembly has a heat dissipation ventilation structure. In the application, the ventilation assembly and the plurality of backrest modules are combined, the specified area of the seat backrest can be ventilated and cooled, so that better heat dissipation effect can be provided and the air volume loss can be reduced.

Description

Technical Field

[0001] This application relates to the field of seating technology, specifically to a seat back, a car seat, and a car. 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 back. In related technologies, to provide ventilation and heat dissipation, a fan is usually installed inside the seat to dissipate heat from the user's back, ensuring that the user's body is dry and comfortable in contact with the seat.

[0003] However, when the fan supplies air to the entire back of the seat, the pores in the foam of the entire seat back will result in a significant loss of airflow, which is not conducive to reducing the power consumption of the fan while ensuring the ventilation and heat dissipation performance of the seat. Utility Model Content

[0004] This application provides a seat backrest, a car seat, and a car, aiming to solve the above-mentioned technical problems.

[0005] In a first aspect, this application provides a seat back, comprising:

[0006] Ventilation components;

[0007] Multiple backrest modules are installed on the mounting base, and the multiple backrest modules are combined to form a seat backrest support;

[0008] The ventilation component provides ventilation airflow to at least one backrest module, and at least one backrest module connected to the ventilation component has a heat dissipation and ventilation structure.

[0009] In some embodiments, when multiple backrest modules are subjected to force, at least one backrest module adjusts its posture.

[0010] In some embodiments, at least a portion of the ventilation assembly connected to the posture-adjusting backrest module conforms to the posture changes of the backrest module.

[0011] In some embodiments, the ventilation assembly includes at least one fan and at least one duct.

[0012] At least one duct has its first end connected to the fan, and at least one duct has its second end connected to the backrest module;

[0013] At least one of the air ducts elastically deforms to adapt to the posture changes of the backrest module it is connected to.

[0014] In some embodiments, when multiple backrest modules are subjected to force, at least one backrest module rotates about the deflection axis or the deflection center to adjust its posture.

[0015] At least one of the air ducts has its second end connected to the area near the deflection axis or deflection center of the backrest module.

[0016] In some embodiments, at least one backrest module has a first connecting portion, which is configured to connect to a rotating connector;

[0017] At least one air duct has its second end connected to the area near the first connection part of the backrest module.

[0018] In some embodiments, at least one backrest module includes a first support portion and a second support portion;

[0019] The first support extends along the first direction, and the second support extends along the second direction;

[0020] Wherein, the first direction is not parallel to the second direction, and the first connecting part for connecting the rotating connector is located at the junction of the first support part and the second support part.

[0021] In some embodiments, at least one backrest module further has a second connecting portion configured to connect to a resilient connector.

[0022] In some embodiments, the second connecting portion of at least one backrest module is located on the side of the first support portion facing the substrate; or

[0023] At least one backrest module has a second connection portion located on the side of the second support portion facing the substrate.

[0024] In some embodiments, the plurality of backrest modules include a first side wing support module and a second side wing support module, and at least one air duct includes a first air duct and a second air duct;

[0025] The first side wing support module rotates around the first deflection axis to adjust its attitude, and the second side wing support module rotates around the second deflection axis to adjust its attitude.

[0026] The second end of the first air duct is connected to the area near the first deflection axis of the first side wing support module, and the second end of the second air duct is connected to the area near the second deflection axis of the second side wing support module.

[0027] In some embodiments, the first side wing support module and the second side wing support module are located on both sides of the central axis of the seat back;

[0028] Specifically, when the seat back is under stress, the first side wing support module deflects towards the central axis of the seat back, and the second side wing support module deflects towards the central axis of the seat back.

[0029] In some embodiments, the first duct and the second duct are connected to the same fan;

[0030] The first and second air ducts are arranged symmetrically with respect to the central axis of the seat back.

[0031] In some embodiments, the plurality of backrest modules include a first end support module, and at least one air duct also includes a third air duct;

[0032] The first end support module is located at the first end of the seat back along the central axis, and the first side wing support module rotates around the third deflection axis to adjust its posture.

[0033] The second end of the third duct is connected to the area near the third deflection axis of the first end support module.

[0034] In some embodiments, at least one duct also includes a fourth duct;

[0035] The second end of the fourth duct is connected to the area near the third deflection axis of the first end support module.

[0036] In some embodiments, the third and fourth air ducts are connected to the same fan;

[0037] The third and fourth air ducts are arranged symmetrically with respect to the central axis of the seat back.

[0038] In some embodiments, the seat back also includes a base plate, on which multiple back modules are mounted;

[0039] The substrate is at least partially elastic, and at least one backrest module adjusts its posture as the substrate elastically deforms.

[0040] In some embodiments, at least a portion of the substrate may be recessed away from the plurality of backrest modules, and at least one backrest module adjusts its posture as the substrate is recessed.

[0041] In some embodiments, when at least a portion of the substrate is deformed by a recess, at least one backrest module deflects toward the recessed area of ​​the substrate.

[0042] In some embodiments, at least a portion of the substrate near the central axis may be recessed in a direction away from the plurality of backrest modules.

[0043] In some embodiments, the substrate has at least one elastic region and at least one rigid region;

[0044] The elastic modulus of any elastic region is less than that of any rigid region.

[0045] In some embodiments, the ventilation assembly includes at least one fan and at least one duct.

[0046] Each duct is connected to the fan, and at least one backrest module is connected to at least one duct.

[0047] In some embodiments, each duct is connected to the air inlet of the fan.

[0048] In some embodiments, each duct is connected to the air outlet of the fan.

[0049] In some embodiments, each backrest module is connected to at least one duct, and each duct is connected to the same fan.

[0050] In some embodiments, at least one duct is connected to the air inlet of the fan, and at least one duct is connected to the air outlet of the fan.

[0051] In some embodiments, at least one duct includes a first sub-duct, a second sub-duct, and a duct joint;

[0052] The first sub-tube extends at least partially along a first preset direction, and the second sub-tube extends at least partially along a second preset direction;

[0053] The first preset direction is not parallel to the second preset direction, and the pipe joint connects the first sub-pipe and the second sub-pipe.

[0054] In some embodiments, the heat dissipation and ventilation structure includes a through-hole extending through the backrest module; and / or the backrest module includes a foam body, and the heat dissipation and ventilation structure includes pores in the foam body.

[0055] In some embodiments, the plurality of backrest modules include a first side wing support module and a second side wing support module;

[0056] The first side wing support module and the second side wing support module are located on both sides of the central axis of the seat back.

[0057] In some embodiments, the multiple backrest modules include multiple first side wing support modules and multiple second side wing support modules;

[0058] Among them, multiple first side wing support modules and multiple second side wing support modules are located on both sides of the central axis of the seat back.

[0059] In some embodiments, the plurality of backrest modules further include a first end support module;

[0060] The first end support module is located at the first end of the seat back along the central axis.

[0061] In some embodiments, the plurality of backrest modules further include a second end support module;

[0062] The second end support module is located at the second end of the seat back along the central axis.

[0063] In some embodiments, each backrest module includes a backrest support plate.

[0064] In some embodiments, each backrest module includes a backrest support plate and a backrest foam body, the backrest foam body being mounted on the backrest support plate.

[0065] In some embodiments, each backrest module includes a backrest support plate;

[0066] At least two backrest support plates are configured to be mounted on the same backrest foam body.

[0067] In some embodiments, the ventilation components are located inside the backrest module.

[0068] Secondly, this application provides an automobile seat, including a seat back as described in the first aspect.

[0069] Thirdly, this application provides an automobile, including the automobile seat described in the second aspect.

[0070] In this embodiment, since the ventilation component can provide airflow to at least one of the backrest modules, and at least one backrest module connected to the ventilation component has a heat dissipation and ventilation structure, in the first aspect, with the combination of the ventilation component and multiple backrest modules, this application can provide ventilation and heat dissipation to a designated area of ​​the seat back, thereby providing better heat dissipation and reducing airflow loss; in the second aspect, since multiple backrest modules are combined to form a seat back support, when designing a new type of car seat with a new appearance and function, only the shape and layout design of multiple backrest modules need to be changed, which is conducive to improving the development and iteration speed of car seats, thereby adapting to the current needs of rapid car replacement; in the third aspect, when users want to configure the seat according to their personal preferences or perform seat repairs, only multiple backrest modules of different shapes and / or layouts need to be replaced, which not only reduces repair costs and difficulties, but also allows for personalized configuration of the seat back according to different user needs. Attached Figure Description

[0071] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0072] Figure 1 An exploded view of a seat backrest in an embodiment of this application is shown;

[0073] Figure 2 A schematic diagram of a ventilation assembly according to an embodiment of this application is shown;

[0074] Figure 3 Another schematic diagram of the ventilation component in an embodiment of this application is shown;

[0075] Figure 4 Another schematic diagram of the ventilation component in an embodiment of this application is shown;

[0076] Figure 5 Another schematic diagram of the ventilation component in an embodiment of this application is shown;

[0077] Figure 6 Another schematic diagram of the ventilation component in an embodiment of this application is shown;

[0078] Figure 7 Another schematic diagram of the ventilation component in an embodiment of this application is shown;

[0079] Figure 8 This paper shows a schematic diagram of a duct structure in one embodiment of the present application;

[0080] Figure 9 This invention illustrates a layout diagram of multiple backrest modules in an embodiment of the present application.

[0081] Figure 10 A schematic diagram of a backrest module in an embodiment of this application is shown;

[0082] Figure 11 A schematic diagram of another structure of the backrest module in an embodiment of this application is shown;

[0083] Figure 12 A schematic diagram of another structure of the backrest module in an embodiment of this application is shown;

[0084] Figure 13 A schematic diagram of another structure of the backrest module in an embodiment of this application is shown;

[0085] Figure 14 A schematic diagram of another structure of the backrest module in an embodiment of this application is shown;

[0086] Figure 15 A schematic diagram of another structure of the backrest module in an embodiment of this application is shown;

[0087] Figure 16 A schematic diagram of another structure of the backrest module in an embodiment of this application is shown;

[0088] Figure 17 This illustration shows another layout diagram of multiple backrest modules in an embodiment of this application;

[0089] Figure 18 This illustration shows another layout diagram of multiple backrest modules in an embodiment of this application;

[0090] Figure 19 This illustration shows another layout diagram of multiple backrest modules in an embodiment of this application;

[0091] Figure 20 This illustration shows another layout diagram of multiple backrest modules in an embodiment of this application;

[0092] Figure 21 This illustration shows another layout diagram of multiple backrest modules in an embodiment of this application;

[0093] Figure 22 This illustration shows another layout diagram of multiple backrest modules in an embodiment of this application;

[0094] Figure 23 This illustration shows another layout diagram of multiple backrest modules in an embodiment of this application;

[0095] Figure 24 This illustration shows a connection diagram of the heat dissipation component and multiple backrest modules in an embodiment of this application;

[0096] Figure 25 This illustration shows another connection diagram between the heat dissipation component and multiple backrest modules in an embodiment of this application;

[0097] Figure 26 This illustration shows another connection diagram between the heat dissipation component and multiple backrest modules in an embodiment of this application;

[0098] Figure 27 This paper shows a schematic diagram of the back of one of the backrest modules in an embodiment of the present application;

[0099] Figure 28 This paper shows a cross-sectional schematic diagram of the connection between multiple backrest modules and the mounting base in an embodiment of this application;

[0100] Figure 29 This paper shows another cross-sectional view of the connection between multiple backrest modules and the mounting base in an embodiment of this application;

[0101] Figure 30 This paper shows another cross-sectional view of the connection between multiple backrest modules and the mounting base in an embodiment of this application;

[0102] Figure 31 Another exploded view of the seat back in an embodiment of this application is shown;

[0103] Figure 32 A schematic diagram of a substrate in an embodiment of this application is shown;

[0104] Figure 33 Another schematic diagram of the substrate in an embodiment of this application is shown;

[0105] Figure 34 Another schematic diagram of the substrate in an embodiment of this application is shown;

[0106] Figure 35 Another schematic diagram of the substrate in an embodiment of this application is shown;

[0107] Figure 36 Another schematic diagram of the substrate in an embodiment of this application is shown;

[0108] Figure 37 Another schematic diagram of the substrate in an embodiment of this application is shown;

[0109] Figure 38 Another schematic diagram of the substrate in an embodiment of this application is shown;

[0110] Figure 39 Another schematic diagram of the substrate in an embodiment of this application is shown;

[0111] Figure 40 This invention provides a cross-sectional schematic diagram of the connection between multiple backrest modules and the base plate and ventilation components in an embodiment of this application when no force is applied.

[0112] Figure 41 This paper shows a cross-sectional schematic diagram of the connection between multiple backrest modules and the base plate and ventilation components under the condition of applying force F in an embodiment of this application;

[0113] Figure 42 This paper shows a cross-sectional schematic diagram of the connection between multiple backrest modules and the base plate and ventilation components in an embodiment of this application;

[0114] Figure 43 This paper shows another cross-sectional view of the connection between multiple backrest modules and the base plate and ventilation components in an embodiment of this application;

[0115] Figure 44 This paper shows a top-view schematic diagram of the backrest module in an embodiment of this application;

[0116] Figure 45 This paper shows another cross-sectional view of the connection between multiple backrest modules and the base plate and ventilation components in an embodiment of this application;

[0117] Figure 46 This paper shows another cross-sectional view of the connection between multiple backrest modules and the base plate and ventilation components in an embodiment of this application;

[0118] Figure 47 This illustration shows another connection diagram between the fan assembly and multiple backrest modules in an embodiment of this application;

[0119] Figure 48 This illustration shows another connection diagram between the fan assembly and multiple backrest modules in an embodiment of this application;

[0120] Figure 49 This illustration shows another connection diagram between the fan assembly and multiple backrest modules in an embodiment of this application;

[0121] Figure 50 This illustration shows another connection diagram between the fan assembly and multiple backrest modules in an embodiment of this application;

[0122] Figure 51 Another exploded view of the seat back is shown in an embodiment of this application.

[0123] Among them, 10 is a ventilation component, 11 is a fan, 111 is an air inlet, 112 is an air outlet, 12 is an air duct, 121 is a first air duct, 122 is a second air duct, 123 is a third air duct, 124 is a fourth air duct, 1201 is a first sub-pipe, 1202 is a second sub-pipe, and 1203 is a pipe joint.

[0124] 20 Backrest module, 201 First connecting part, 202 Second connecting part, 203 First support part, 204 Second support part, 210 Backrest support plate, 220 Backrest foam body, 21 First side wing support module, 211 First side wing support module, 22 Second side wing support module, 221 Second side wing support module, 23 First end support module, 24 Second end support module;

[0125] 30 Substrate, 301 Elastic region, 302 Rigid region, 31 First through groove, 32 First recess, 33 Second through groove, 34 Elastic element, 40 Backrest frame, 50 Protective shell, 60 Headrest. Detailed Implementation

[0126] 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 some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0127] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0128] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0129] 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 back. In related technologies, to provide ventilation and heat dissipation, a fan assembly is usually installed inside the seat to dissipate heat from the user's back, ensuring that the user's body is dry and comfortable in contact with the seat.

[0130] However, when the fan supplies air to the entire back of the seat, the pores in the foam of the seat back do not direct all the airflow to the back of the person, which will result in a large loss of air volume. This is not conducive to reducing the power consumption of the fan while ensuring the ventilation and heat dissipation performance of the seat.

[0131] Furthermore, with the rapid iteration of new energy vehicles, car seats also need to respond to the rapid replacement needs of car manufacturers. Designing a new car seat requires a long process of research and development, structural strength testing, and product verification. The traditional car seat structure also limits the development and iteration speed of car seat products.

[0132] Furthermore, in today's car seat market, users' demand for seat personalization is growing. More and more users expect to be able to configure seats according to their personal preferences, or change seats with different styles or colors during use, or add or remove certain seat functions (heating, ventilation, massage, etc.). However, the appearance and functional configuration of car seats currently on the market are usually fixed during production, making it difficult to quickly and flexibly change them according to users' personal preferences, thus failing to meet the diverse needs of consumers.

[0133] Therefore, current traditional designs for car seat backrests, including frames, foam bodies, and coverings, suffer from drawbacks such as unsatisfactory user experience, slow development and iteration speed, and inability to meet user personalization needs. To address this, this application provides a seat backrest, a car seat, and a car, which will be described in detail below.

[0134] First, refer to Figure 1 , Figure 1 An exploded view of a seat backrest according to an embodiment of this application is shown, wherein the seat backrest includes a ventilation assembly 10 and a plurality of backrest modules 20.

[0135] Specifically, the ventilation component 10 can provide ventilation airflow to at least one backrest module 20 to dissipate heat from the back of the human body that is in contact with the backrest module 20, thereby ensuring that the user's body is dry and comfortable in contact with the seat surface.

[0136] In some embodiments of this application, the ventilation component 10 can blow air onto at least one backrest module 20, causing the at least one backrest module 20 to dissipate heat by blowing air onto the back of the human body. In some embodiments of this application, the ventilation component 10 can draw air into at least one backrest module 20, causing the at least one backrest module 20 to dissipate heat by drawing air onto the back of the human body.

[0137] In some embodiments of this application, the ventilation component 10 may be disposed inside one or more backrest modules 20. For example, a fan 11 may be disposed inside each backrest module 20, such that each fan 11 provides ventilation airflow to the corresponding backrest module 20. In some embodiments of this application, the ventilation component 10 may be connected to one or more backrest modules 20. For example, a fan 11 may be connected to one or more backrest modules 20 through a duct, such that one fan 11 provides ventilation airflow to one or more backrest modules 20.

[0138] In some embodiments of this application, the ventilation assembly 10 includes at least one fan 11 and at least one duct 12; each duct 12 is connected to the fan 11, and at least one backrest module 20 is connected to at least one duct 12.

[0139] For example, see Figure 1 as well as Figure 2 , Figure 2 The diagram shows a ventilation component 10 in an embodiment of this application. The ventilation component 10 includes a fan 11 and four air ducts 12. Each air duct 12 is connected to the same fan 11. One or more backrest modules 20 can be connected to one or more air ducts 12 so as to provide ventilation airflow to the corresponding backrest module 20 through one or more air ducts 12.

[0140] For example, see Figure 3 , Figure 3 Another schematic diagram of the ventilation component 10 in this application embodiment is shown, wherein the ventilation component 10 includes four fans 11 and four air ducts 12, each air duct 12 is connected to a fan 11, and one or more backrest modules 20 can be connected to one or more air ducts 12 so as to provide ventilation airflow to the corresponding backrest module 20 through one or more air ducts 12.

[0141] For example, see Figure 4 , Figure 4 Another schematic diagram of the ventilation component 10 in this application embodiment is shown, wherein the ventilation component 10 includes two fans 11 and four air ducts 12, each pair of air ducts 12 is connected to one fan 11, and one or more backrest modules 20 can be connected to one or more air ducts 12 so as to provide ventilation airflow to the corresponding backrest module 20 through one or more air ducts 12.

[0142] In some embodiments of this application, such as an embodiment in which the ventilation assembly 10 can draw air from at least one backrest module 20, the ventilation assembly 10 includes at least one fan 11 and at least one duct 12, each duct 12 being connected to the air inlet 111 of the fan 11.

[0143] For example, see Figure 5 , Figure 5 Another schematic diagram of the ventilation assembly 10 in the embodiment of this application is shown, wherein the fan 11 has an air inlet 111 and an air outlet 112. The air inlet 111 may refer to the air inlet pipe 12 of the fan 11 or the corresponding part of the air inlet volute. The air outlet 112 may refer to the air outlet volute of the fan 11 or the corresponding part of the air outlet pipe 12. Since each air pipe 12 is connected to the air inlet 111 of the fan 11, the ventilation assembly 10 can draw air from at least one backrest module 20.

[0144] In some embodiments of this application, such as an embodiment in which the ventilation assembly 10 can blow air to at least one backrest module 20, the ventilation assembly 10 includes at least one fan 11 and at least one duct 12, each duct 12 being connected to the air outlet 112 of the fan 11.

[0145] For example, see Figure 6 , Figure 6 Another schematic diagram of the ventilation assembly 10 in the embodiment of this application is shown, wherein the fan 11 has an air inlet 111 and an air outlet 112. Since each air duct 12 is connected to the air outlet 112 of the fan 11, the ventilation assembly 10 can blow air to at least one backrest module 20, thereby achieving the purpose of heat dissipation of the backrest module 20.

[0146] In some embodiments of this application, the ventilation assembly 10 includes at least one fan 11 and multiple ducts 12, with at least one duct 12 connected to the air inlet 111 of the fan 11 and at least one duct 12 connected to the air outlet 112 of the fan 11.

[0147] For example, see Figure 7 , Figure 7 Another schematic diagram of the ventilation assembly 10 in this application embodiment is shown, wherein the fan 11 has an air inlet 111 and an air outlet 112, two air ducts 12 are connected to the air inlet 111 of the fan 11, and two other air ducts 12 are connected to the air outlet 112 of the fan 11. Therefore, the ventilation assembly 10 can not only blow air to at least one backrest module 20, but also draw air to at least one backrest module 20, thereby realizing the air-drawing heat dissipation and air-blowing heat dissipation process of the seat back.

[0148] In some embodiments of this application, each duct 12 may be connected to the same fan 11. For example, in Figure 5 In this configuration, all four ducts 12 are connected to the air inlet 111 of the same fan 11; for example, in Figure 6 In the middle, all four rods are connected to the air outlet 112 of the same fan 11; for example, in Figure 7 In the middle, two air ducts 12 are connected to the air inlet 111 of the fan 11, and the other two air ducts 12 are connected to the air outlet 112 of the fan 11.

[0149] In some embodiments of this application, the fan 11 may be, but is not limited to, a centrifugal fan, an axial fan, or a mixed-flow fan, etc., a device for driving gas. In some embodiments of this application, the duct 12 may be a flexible pipe, such as a polyethylene pipe, a polyvinyl chloride pipe, a rigid polyvinyl chloride pipe, or a polypropylene pipe, etc., a flexible non-metallic pipe. In some embodiments of this application, the duct 12 may be a flexible or flexible pipe, such as a corrugated pipe, a fluorinated ethylene propylene copolymer pipe, or a spring pipe, etc.

[0150] In some embodiments of this application, such as embodiments where the duct 12 is flexible, at least one duct 12 includes a first sub-duct 1201, a second sub-duct 1202, and a pipe joint 1203; the first sub-duct 1201 extends at least partially along a first preset direction, and the second sub-duct 1202 extends at least partially along a second preset direction; wherein the first preset direction and the second preset direction are not parallel, and the pipe joint 1203 connects the first sub-duct 1201 and the second sub-duct 1202.

[0151] For example, see Figure 8 , Figure 8 A schematic diagram of a duct 12 in an embodiment of this application is shown, wherein the first sub-duct 1201 extends horizontally and the second sub-duct 1202 extends vertically. That is, the first preset direction in which the first sub-duct 1201 extends horizontally is perpendicular to the second preset direction in which the second sub-duct 1202 extends. The pipe joint 1203 connects the first sub-duct 1201 and the second sub-duct 1202, so that the first sub-duct 1201 and the second sub-duct 1202 are connected to form a complete air duct passage. At the same time, it can also form a detachable duct 12 structure, so as to facilitate the installation of the duct 12 inside the seat.

[0152] It is understood that the above-described embodiments of the ventilation component 10 are merely exemplary embodiments of this application. Those skilled in the art can make equivalent modifications to the ventilation component 10 under the guidance of this application. For example, it is understood that in some possible embodiments, the duct 12 may also be a rigid pipe, such as a metal pipe.

[0153] Continue reading Figure 9 , Figure 9 The diagram illustrates a layout of multiple backrest modules 20 in an embodiment of this application. The multiple backrest modules 20 are mounted on corresponding mounting bases (such as the base plate 30 or backrest frame 40 mentioned later). The multiple backrest modules 20 can be combined to form a seat back support, so as to provide back support for at least part of the user's back (such as the left side of the waist, the right side of the waist, the cervical spine, the lumbar spine, the scapula, the ribs, the sacrum and coccyx, the chest and back, etc.) through the multiple backrest modules 20.

[0154] Generally, at least one backrest module 20 connected to the ventilation component 10 has a heat dissipation and ventilation structure. For example, the heat dissipation and ventilation structure may include ventilation structures such as through holes, through slots, and gaps penetrating the backrest module 20. Alternatively, in embodiments where the backrest module 20 includes a foam body and a covering fabric, the heat dissipation and ventilation structure may include pores in the foam body and pores in the covering fabric, allowing the backrest module 20 to further refine the heat dissipation airflow through its heat dissipation and ventilation structure, thereby better accommodating heat dissipation for the user. Simultaneously, each backrest module 20 may have a mounting structure, such as mounting holes, threaded holes, mounting slots, pin holes, threaded posts, mounting posts, pins, or other bolted, threaded, or pin-connected detachable mounting structures, to facilitate the detachable mounting of multiple backrest modules 20 onto corresponding mounting bases (such as the base plate 30 or backrest frame 40 mentioned later).

[0155] It is understood that in some possible embodiments, a gas distribution component can also be provided inside the backrest module 20 to form a heat dissipation and ventilation structure, such as an air distribution bag or a hollow sphere with through holes on its surface, and the air duct 12 can be connected to the gas distribution component to achieve heat dissipation gas distribution; or, in some possible embodiments, multiple backrest modules 20 can also be fixed non-removably to the corresponding mounting base, for example, the connecting structure (e.g., connecting column) of the backrest module 20 can be welded to the backrest frame 40 mentioned later.

[0156] In some embodiments of this application, each backrest module 20 may include a backrest support plate 210.

[0157] For example, see Figure 10 , Figure 10 A schematic diagram of a backrest module 20 in an embodiment of this application is shown. The backrest modules 20 on the left, right, upper and lower sides all include backrest support plates 210. The backrest support plates 210 can be installed on the basic structural components (such as the base plate 30 or the backrest frame 40 mentioned later) through a detachable connection structure, so that multiple backrest support plates 210 form a seat backrest support.

[0158] In some embodiments of this application, each backrest module 20 includes a backrest support plate 210 and a backrest foam body 220, with the backrest foam body 220 mounted on the backrest support plate 210.

[0159] For example, see Figure 11 , Figure 11This illustration shows another structural diagram of the backrest module 20 in an embodiment of this application. Each backrest module 20 includes a backrest support plate 210 and a backrest foam body 220. The backrest foam body 220 is mounted on the backrest support plate 210 and can provide elastic support for the user, thereby providing a good riding experience. The backrest support plate 210 can be provided with detachable connection and installation structures such as mounting holes, threaded holes, mounting grooves, pin holes, threaded posts, mounting posts, and pins for bolt connections, threaded connections, or pin connections, so as to facilitate the installation of the backrest module 20 on the basic structural components (such as the base plate 30 or the backrest frame 40 mentioned later).

[0160] In some embodiments of this application, each backrest module 20 includes a backrest support plate 210; at least two backrest support plates 210 are configured to mount the same backrest foam body 220.

[0161] For example, see Figure 12 , Figure 12 This paper shows another structural schematic diagram of the backrest module 20 in an embodiment of the present application, in which the two backrest support plates 210 on the left and right sides are equipped with the same backrest foam body 220, so that the backrest foam body 220 becomes the main flexible object supporting the back of the human body.

[0162] For example, see Figure 13 , Figure 13 This paper shows another structural schematic diagram of the backrest module 20 in an embodiment of this application, in which the three backrest support plates 210 in the left, right and central regions are equipped with the same backrest foam body 220, so that the backrest foam body 220 becomes the main flexible object supporting the back of the human body.

[0163] For example, see Figure 14 , Figure 14 This illustration shows another structural diagram of the backrest module 20 in an embodiment of this application. The two backrest support plates 210 on the left side are equipped with the same backrest foam body 220, and the two backrest support plates 210 on the right side are equipped with the same backrest foam body 220, so that the two backrest foam bodies 220 become the main flexible objects supporting the left and right sides of the human back.

[0164] It is understood that in the above embodiments, the backrest foam 220 can be a rigid foam plastic (such as polystyrene foam, epoxy resin foam), a soft foam plastic (such as polyurethane sponge, rubber foam), or a semi-rigid foam plastic. Alternatively, the backrest foam 220 can be various types of foam and flexible materials composed of a cover, so as to wrap the backrest foam 220 with the cover.

[0165] In some embodiments of this application, adjacent backrest support plates 210 may also be connected by a movable connector.

[0166] For example, see Figure 15 , Figure 15 This paper shows another structural schematic diagram of the backrest module 20 in an embodiment of this application. The left and right backrest support plates 210 can be connected by springs, so that the left and right backrest support plates 210 generate interaction forces during the posture adjustment process and form a linkage posture adjustment process.

[0167] For example, see Figure 16 , Figure 16 The diagram shows another structural schematic of the backrest module 20 in this embodiment. The two backrest support plates 210 on the left side can be connected by springs, and the two backrest support plates 210 on the right side can be connected by springs, so that the two backrest support plates 210 on the left and right sides generate interaction forces during the posture adjustment process and form a linkage posture adjustment process.

[0168] It should be noted that the above is only an exemplary embodiment of the backrest module 20. Those skilled in the art can make equivalent modifications under the guidance of this application. For example, each backrest support plate 210 can also be equipped with multiple backrest foam bodies. However, it should be emphasized that in this application, whether each backrest support plate 210 is equipped with one or more backrest foam bodies 220, multiple backrest support plates 210 are equipped with the same backrest foam body 220, or multiple backrest foam bodies 220 are directly installed on the substrate, they should all be considered as falling within the scope of "multiple backrest modules" in this application.

[0169] It should be noted that, in the following description, the central axis of the seat back refers to the straight line corresponding to the position of the user's spine after sitting down, so that the shape of the seat back corresponds to the user's back, thereby providing the user with complete back support.

[0170] In some embodiments of this application, the multiple backrest modules 20 include a first side wing support module 21 and a second side wing support module 22; the first side wing support module 21 and the second side wing support module 22 are respectively located on both sides of the central axis of the seat back.

[0171] For example, see Figure 17 , Figure 17 This illustration shows another layout of multiple backrest modules 20 in an embodiment of this application, wherein the first side wing support module 21 and the second side wing support module 22 are located on the left and right sides of the central axis of the seat back, respectively. The first side wing support module 21 can provide support for at least the left side of the user's back, and the second side wing support module 22 can provide support for at least the right side of the user's back.

[0172] In some embodiments of this application, the multiple backrest modules 20 include a first side wing support module 21, a second side wing support module 22, and a first end support module 23; the first side wing support module 21 and the second side wing support module 22 are respectively located on both sides of the central axis of the seat back, and the first end support module 23 is located at the first end of the seat back along the central axis.

[0173] For example, see Figure 18 , Figure 18 This illustration shows another layout of multiple backrest modules 20 in an embodiment of this application. The first side wing support module 21 and the second side wing support module 22 are located on the left and right sides of the central axis of the seat back, respectively. The first end support module 23 is located at the upper end. The first side wing support module 21 can provide support for at least the left side of the user's back, the second side wing support module 22 can provide support for at least the right side of the user's back, and the first end support module 23 can provide support for the user's shoulders and neck, thereby providing the user with a better riding experience.

[0174] In some embodiments of this application, the plurality of backrest modules 20 include a first side wing support module 21, a second side wing support module 22, a first end support module 23, and a second end support module 24; the first side wing support module 21 and the second side wing support module 22 are respectively located on both sides of the central axis of the seat back, the first end support module 23 is located at the first end of the seat back along the central axis, and the second end support module 24 is located at the second end of the seat back along the central axis.

[0175] For example, see Figure 19 , Figure 19 This illustration shows another layout of multiple backrest modules 20 in an embodiment of this application. The first side wing support module 21 and the second side wing support module 22 are located on the left and right sides of the central axis of the seat back, respectively. The first end support module 23 is located at the upper end and the second end support module 24 is located at the lower end. The first side wing support module 21 can provide support for at least the left side of the user's back waist, the second side wing support module 22 can provide support for at least the right side of the user's back waist, the first end support module 23 can provide support for the user's shoulders and neck, and the second end support module 24 can provide support for the user's tailbone, thereby providing the user with a better riding experience.

[0176] In some embodiments of this application, the multiple backrest modules 20 include multiple first side wing support modules 211 and multiple second side wing support modules 221, which are respectively located on both sides of the central axis of the seat back.

[0177] For example, see Figure 20 , Figure 20 This illustration shows another layout of multiple backrest modules 20 in an embodiment of this application, wherein multiple first side wing support modules 211 are located on the left side of the central axis of the seat back, and multiple second side wing support modules 221 are located on the right side of the central axis of the seat back. The multiple second side wing support modules 221 can provide support for at least the left side of the user's back, and the multiple first side wing support modules 211 can provide support for at least the right side of the user's back.

[0178] Those skilled in the art will understand that the above-described layout of the multiple backrest modules 20 is not limited to... Figures 17 to 20 For example, see Figure 21 , Figure 21 This illustration shows another layout diagram of the plurality of backrest modules 20 in an embodiment of this application. In an embodiment where the plurality of backrest modules 20 include a plurality of first side wing support modules 211 and a plurality of second side wing support modules 221, the plurality of backrest modules 20 may further include a first end support module 23, which is located at the first end of the seat back along the central axis direction; for example, see [reference to...]. Figure 22 , Figure 22 This illustration shows another layout diagram of the plurality of backrest modules 20 in an embodiment of this application. In an embodiment where the plurality of backrest modules 20 include a plurality of first side wing support modules 211 and a plurality of second side wing support modules 221, the plurality of backrest modules 20 may further include a second end support module 24, which is located at the second end of the seat back along the central axis direction; for example, see [reference to...]. Figure 23 , Figure 23 This illustration shows another layout of multiple backrest modules 20 in an embodiment of this application. In an embodiment where multiple backrest modules 20 include multiple first side wing support modules 211 and multiple second side wing support modules 221, the multiple first side wing support modules 211 can be arranged in a direction perpendicular to the central axis, and the multiple second side wing support modules 221 can be arranged in a direction perpendicular to the central axis.

[0179] In this embodiment, since the ventilation component 10 can provide ventilation airflow to at least one backrest module 20, and at least one backrest module 20 connected to the ventilation component 10 has a heat dissipation and ventilation structure, the combination of the ventilation component 10 and multiple backrest modules 20 can provide ventilation and heat dissipation to a designated area of ​​the seat back, thereby providing better heat dissipation effect and helping to reduce airflow loss.

[0180] For example, see Figure 24 , Figure 24The diagram shows a connection between the heat dissipation component and multiple backrest modules 20 in an embodiment of this application. The fan 11 provides ventilation airflow to the left and right backrest modules 20 through two air ducts 12, thereby dissipating heat on the left and right sides of the user's back. Since it does not provide ventilation airflow to all areas of the entire seat back, it can reduce airflow loss.

[0181] For example, see Figure 25 , Figure 25 This illustration shows another connection diagram between the heat dissipation component and multiple backrest modules 20 in an embodiment of this application. In this case, the fan 11 provides ventilation airflow to the left and right backrest modules 20 respectively through two air ducts 12, and the fan 11 provides ventilation airflow to the upper backrest module 20 through two air ducts 12, thereby dissipating heat on the left side of the user's back, the right side of the back, and the back and neck. Since it does not provide ventilation airflow to all areas of the entire seat back, it can reduce airflow loss.

[0182] For example, see Figure 26 , Figure 26 This illustration shows another connection diagram between the heat dissipation component and multiple backrest modules 20 in an embodiment of this application. In this case, the fan 11 on the left provides ventilation airflow to the backrest module 20 on the left through the air duct 12, and the fan 11 on the right provides ventilation airflow to the backrest module 20 on the right through the air duct 12. This allows for heat dissipation of the left and right back areas of the user's back. Since ventilation airflow is not provided to all areas of the entire seat back, airflow loss can be reduced.

[0183] As can be seen, in this embodiment, since the ventilation component 10 can provide ventilation airflow to at least one backrest module 20, and at least one backrest module 20 connected to the ventilation component 10 has a heat dissipation and ventilation structure, in the first aspect, with the combination of the ventilation component 10 and multiple backrest modules 20, this application can provide ventilation and heat dissipation to a designated area of ​​the seat back, thereby providing better heat dissipation and reducing airflow loss; in the second aspect, since multiple backrest modules 20 are combined to form a seat back support, when designing a new type of car seat with a new appearance and function, only the shape and layout design of multiple backrest modules 20 need to be changed, which is conducive to improving the development and iteration speed of car seats, thereby adapting to the current needs of rapid car replacement; in the third aspect, when users want to configure the seat according to their personal preferences or perform seat repairs, only multiple backrest modules 20 with different shapes and / or layouts need to be replaced, which not only reduces repair costs and difficulties, but also allows for personalized configuration of the seat back according to different user needs.

[0184] In some embodiments of this application, when multiple backrest modules 20 are subjected to force, at least one backrest module 20 adjusts its posture. That is, the backrest module 20 can adjust its posture to adapt to the curve of the human back, thereby improving the user's experience.

[0185] For example, in Figure 17 In the middle, the first side wing support module 21 and the second side wing support module 22 can adjust their posture after being subjected to force, so that the seat back can adapt to the curves of the left and right sides of the human back.

[0186] For example, in Figure 18 In the middle, the first side wing support module 21, the second side wing support module 22, and the first end support module 23 can adjust their posture so that the seat back can adapt to the curves of the left, right and upper parts of the human back.

[0187] For example, in Figure 19 In the middle, the first side wing support module 21, the second side wing support module 22, the first end support module 23, and the second end support module 24 can adjust their posture after being subjected to force, so that the seat back can adapt to the curves of the left, right, lower and upper parts of the human back.

[0188] For example, in Figure 20 In the middle, multiple first side wing support modules 211 and multiple second side wing support modules 221 can adjust their posture after being subjected to force, so that the seat back can adapt to the curves of the left and right sides of the human back.

[0189] In some embodiments of this application, the posture adjustment of the backrest module 20 can be caused by the movement of the backrest module 20 itself relative to the mounting base (e.g., the backrest frame 40). In some embodiments of this application, the posture adjustment of the backrest module 20 can be caused by the deformation of the mounting base (e.g., the base plate 30) of the backrest module 20.

[0190] In some embodiments of this application, such as embodiments where the backrest module 20 can move relative to the mounting base to achieve posture adjustment, the backrest module 20 can be provided with a connecting part, through which a movable connecting member (e.g., hinge, ball joint, spring, etc.) is connected to achieve posture adjustment.

[0191] For example, see Figure 27 , Figure 27A rear view of a plurality of backrest modules 20 in an embodiment of this application is shown. The left and right backrest modules 20 have two first connecting parts 201 and two second connecting parts 202, respectively. The top backrest module 20 has two first connecting parts 201 and two second connecting parts 202, respectively. The bottom backrest module 20 has two first connecting parts 201 and one second connecting part 202. When the first connecting parts 201 and / or the second connecting parts 202 are connected to the mounting base (e.g., base plate 30 or backrest frame 40) by movable connecting parts such as springs, hinges, or ball joints, the backrest module 20 can adjust its posture relative to the mounting base.

[0192] For example, see Figure 28 , Figure 28 This illustration shows a cross-sectional view of the connection points between multiple backrest modules 20 and the mounting base in an embodiment of this application. The left backrest module 20 is rotatably fixed to the mounting base via a first connecting part 201, and compressibly fixed to the mounting base via a second connecting part 202. In this configuration, the left backrest module 20 can rotate around the rotation point of the first connecting part 201 to adjust its posture. Similarly, the right backrest module 20 is rotatably fixed to the mounting base via the first connecting part 201, and compressibly fixed to the mounting base via the second connecting part 202. In this configuration, the right backrest module 20 can rotate around the rotation point of the first connecting part 201 to adjust its posture. Furthermore, the left and right backrest modules 20 rotate in opposite directions, thus providing a wraparound seating experience for the user.

[0193] For example, see Figure 29 , Figure 29 This illustration shows another cross-sectional view of the connection points between multiple backrest modules 20 and the mounting base in an embodiment of this application. The left backrest module 20 is rotatably fixed to the mounting base via a first connecting part 201, and is also stretchably fixed to the mounting base via a second connecting part 202. The left backrest module 20 can rotate around the rotation point of the first connecting part 201 to adjust its posture. Similarly, the right backrest module 20 is rotatably fixed to the mounting base via the first connecting part 201, and is also stretchably fixed to the mounting base via the second connecting part 202. The right backrest module 20 can rotate around the rotation point of the first connecting part 201 to adjust its posture. Furthermore, the left and right backrest modules 20 rotate in opposite directions, thus providing a wraparound seating experience for the user.

[0194] For example, see Figure 30 , Figure 30This illustration shows another cross-sectional view of the connection between multiple backrest modules 20 and the mounting base in an embodiment of this application. The left backrest module 20 is connected to the mounting base via a spring through a first connecting part 201 and a second connecting part 202. At this time, the left backrest module 20 can adjust its posture by the deformation of the spring. The right backrest module 20 is also connected to the mounting base via a spring through a first connecting part 201 and a second connecting part 202. At this time, the right backrest module 20 can adjust its posture by the deformation of the spring. Furthermore, the left and right backrest modules 20 rotate in opposite directions, thus providing a wraparound seating experience for the user.

[0195] In some embodiments of this application, such as the embodiment where the backrest module 20 adjusts its posture by deforming the mounting base, see [reference needed]. Figure 31 , Figure 31 Another exploded view of the seat back in an embodiment of this application is shown, wherein the seat back also includes a base plate 30, and a plurality of backrest modules 20 are mounted on the base plate 30; the base plate 30 is at least partially elastic, and at least one backrest module 20 adjusts its posture as the base plate 30 elastically deforms.

[0196] Specifically, the base plate 30 can provide a mounting foundation for the backrest module 20, allowing all or part of the connection structures (e.g., the first connection portion 201 and the second connection portion 202) of the backrest module 20 to be connected to the base plate 30, thereby fixing the backrest module 20. Generally, the base plate 30 can have mounting structures for mounting the backrest module 20. For example, the base plate 30 can be provided with mounting holes, threaded holes, mounting grooves, pin holes, threaded posts, mounting posts, pins, and other bolted, threaded, or pin-connected detachable connection mounting structures, so as to detachably mount multiple backrest modules 20 onto the base plate 30.

[0197] The substrate 30 is at least partially elastic; that is, the substrate 30 may be entirely elastic or only partially elastic. It should be noted that "the substrate 30 is elastic" in this application means that the substrate 30 can undergo elastic deformation, i.e., the substrate 30 can deform after a certain force is applied to it, and can recover its deformation after the applied force is removed.

[0198] In some embodiments of this application, such as embodiments where a portion of the substrate 30 is elastic, the substrate 30 has at least one elastic region 301 and at least one rigid region 302. The elastic modulus of any elastic region 301 is less than the elastic modulus of any rigid region 302. Therefore, when the elastic region 301 and / or the rigid region 302 are subjected to a force, the elastic region 301 of the substrate 30 will deform.

[0199] For example, see Figure 32 , Figure 32 The diagram shows a schematic of a substrate 30 in an embodiment of this application. When forces F1 and F2 are applied to the elastic region 301 in the middle of the substrate 30, the elastic region 301 in the middle of the substrate 30 will be deformed by indentation. When forces F3 and F4, with at least some of their opposing forces, are applied to the rigid regions 302 on both sides of the substrate 30, the two sides of the substrate 30 will be compressed, which will also cause the elastic region 301 in the middle of the substrate 30 to be deformed by indentation.

[0200] It should be noted that, in the following description, the central axis of the substrate 30 refers to any straight line passing through the geometric center of the substrate 30. Under normal circumstances, the central axis of the substrate 30 is parallel to the central axis of the seat back, that is, the central axis of the substrate 30 is also a straight line corresponding to the position of the user's spine after sitting.

[0201] In some embodiments of this application, the elastic region 301 of the substrate 30 may be near the central axis of the substrate 30.

[0202] For example, see Figure 33 , Figure 33 The diagram shows another schematic of the substrate 30 in the embodiment of this application. The elastic region 301 is in the middle of the substrate 30, and the rigid region 302 is on both sides of the substrate 30. When a force is applied to the elastic region 301, the middle of the substrate 30 will be deformed by indentation; or, when a compressive force is applied to both sides of the substrate 30, the middle of the substrate 30 will also be deformed by indentation.

[0203] For example, see Figure 34 , Figure 34 This illustration shows another schematic diagram of the substrate 30 in an embodiment of this application. Multiple elastic regions 301 are located in the middle of the substrate 30, and rigid regions 302 are arranged in a ring along the edge of the substrate 30. When a force is applied to the elastic regions 301, the middle of the substrate 30 will be deformed by indentation. Alternatively, when a compressive force is applied to the rigid regions 302 on both sides of the substrate 30, the middle of the substrate 30 will also be deformed by indentation.

[0204] For example, see Figure 35 , Figure 35 Another schematic diagram of the substrate 30 in the embodiment of this application is shown. The elastic region 301 is in the middle of the substrate 30, and the rigid region 302 is arranged in a ring along the edge of the substrate 30. The rigid region 302 at the edge of the substrate 30 surrounds the elastic region 301 in the center of the substrate 30. When a force is applied to the elastic region 301, the middle of the substrate 30 will be deformed by indentation. Alternatively, when a compressive force is applied to the rigid regions 302 on opposite sides of the substrate 30, the middle of the substrate 30 will also be deformed by indentation.

[0205] It is worth noting that the above-described layout of the elastic region 301 and rigid region 302 of the substrate 30 is only an exemplary embodiment of this application. Those skilled in the art can make equivalent modifications under the guidance of this application, for example, in... Figures 32 to 35 The elastic region 301 shown is approximately rectangular in shape. In some possible embodiments, the elastic region 301 may also be circular, triangular, regular pentagonal, or other shapes.

[0206] As an exemplary embodiment of the elastic region 301, see [reference]. Figure 36 , Figure 36 Another schematic diagram of the substrate 30 in the embodiment of this application is shown, wherein the elastic region 301 of the substrate 30 has a plurality of first through grooves 31 penetrating the substrate 30. The first through grooves 31 of the substrate 30 make the region more prone to deformation under the same force. When a force is applied to the elastic region 301, the middle part of the substrate 30 will be deformed; or, when a compressive force is applied to both sides of the substrate 30, the middle part of the substrate 30 will also be deformed.

[0207] As another exemplary embodiment of the flexible region 301, see [reference]. Figure 37 , Figure 37 Another schematic diagram of the substrate 30 in the embodiment of this application is shown, wherein the elastic region 301 of the substrate 30 has a plurality of first grooves 32. The first grooves 32 of the substrate 30 make the region more prone to deformation under the same force. When a force is applied to the elastic region 301, the middle part of the substrate 30 will be concave and deformed; or, when a compressive force is applied to both sides of the substrate 30, the middle part of the substrate 30 will also be concave and deformed.

[0208] As another exemplary embodiment of the elastic region 301, see [reference]. Figure 38 , Figure 38 Another schematic diagram of the substrate 30 in an embodiment of this application is shown, wherein the elastic region 301 of the substrate 30 is provided with a second through groove 33 corresponding to the size of the elastic region 301. A plurality of elastic elements 34 are installed in the second through groove 33. The elastic elements 34 can be, but are not limited to, helical springs, linear springs or rubber parts, etc., structural components that can undergo elastic deformation. The plurality of elastic elements 34 can make the region more prone to deformation under the same force. When a force is applied to the elastic region 301, the middle part of the substrate 30 will be concave and deformed; or, when a compressive force is applied to both sides of the substrate 30, the middle part of the substrate 30 will also be concave and deformed.

[0209] It is worth noting that the above-described embodiment regarding the elastic region 301 of the substrate 30 is merely an exemplary embodiment of this application, and those skilled in the art can make equivalent modifications under the guidance of this application. For example, in Figures 36 to 38 The first through groove 31, the first recess 32, and the elastic element 34 of the elastic region 301 shown extend in a direction parallel to the central axis of the substrate 30, but are not limited thereto. For example, in some possible embodiments, see [reference needed]. Figure 39 , Figure 39 Another schematic diagram of the substrate 30 in an embodiment of this application is shown. The elastic member 34 may also extend in a direction perpendicular to the central axis of the substrate 30.

[0210] In some embodiments of this application, at least a portion of the ventilation assembly 10 connected to the posture-adjusting backrest module 20 conforms to the posture changes of the backrest module 20.

[0211] It should be noted that when multiple backrest modules 20 are subjected to force, if at least one backrest module 20 adjusts its posture to adapt to the user's back curve, since at least part of the structure of the ventilation component 10 connected to the posture-adjusting backrest module 20 conforms to the posture change deformation of the backrest module 20, the posture change of the backrest module 20 is hardly affected by the ventilation component 10. On the one hand, this allows the seat back to better conform to the human back curve, thereby improving the user experience; on the other hand, when a car accident occurs, the backrest module 20 can also produce a large angle deflection and / or position change posture adjustment, thereby effectively buffering the driver or passenger to achieve car collision protection.

[0212] In some embodiments of this application, such as the embodiment of the ventilation assembly 10 including at least one fan 11 and at least one duct 12, the first end of the at least one duct 12 is connected to the fan 11, and the second end of the at least one duct 12 is connected to the backrest module 20, wherein the at least one duct 12 elastically deforms in accordance with the posture changes of the connected backrest module 20.

[0213] For example, see Figure 40 , Figure 40 This illustration shows a cross-sectional view of the connection between multiple backrest modules 20 and the substrate 30 and ventilation assembly 10 in an embodiment of this application when no force is applied. The first connecting portion 201 of the left and right backrest modules 20 is rotatably connected to the rigid region 302 of the substrate 30, and the second connecting portion 202 of the left and right backrest modules 20 is elastically connected to the elastic region 301 of the substrate 30. The left and right backrest modules 20 are not subjected to any force, and the left and right backrest modules 20 do not adjust their posture. At this time, the air duct 12 on the left and the air duct 12 on the right do not deform.

[0214] Continue reading Figure 41 , Figure 41 This illustration shows a cross-sectional view of the connection between multiple backrest modules 20 and the base plate 30 and ventilation assembly 10 under the applied force F in an embodiment of this application. The backrest modules 20 on the left and right sides are both subjected to the force F. The backrest module 20 on the left side undergoes a clockwise deflection movement and adjusts its posture, while the backrest module 20 on the right side undergoes a counterclockwise deflection movement and adjusts its posture. The elastic region 301 of the base plate 30 is deformed by indentation. Under these circumstances, the air duct 12 on the left side undergoes a clockwise elastic deformation, and the air duct 12 on the right side undergoes a counterclockwise elastic deformation. That is, the air duct 12 can elastically deform in accordance with the posture change of the backrest module 20, thereby reducing the influence of the air duct 12 on the posture adjustment of the backrest module 20.

[0215] In some embodiments of this application, at least a portion of the substrate 30 may be recessed away from the plurality of backrest modules 20, and at least one backrest module 20 adjusts its posture as the substrate 30 is recessed.

[0216] For example, in Figure 41 In the process, when the elastic region 301 at the center of the substrate 30 is recessed away from the multiple backrest modules 20, the left backrest module 20 deflects clockwise and adjusts its posture, and the right backrest module 20 deflects counterclockwise and adjusts its posture. At this time, the parts of the left and right backrest modules 20 that are close to the center of the substrate 30 move downward as they are recessed and deformed, while the parts that are away from the center of the substrate 30 tilt upward. Therefore, it can provide users with a wrap-around seating experience. At the same time, the recessed deformation of the substrate 30 and the deflection of the left and right backrest modules 20 can provide a cushioning effect for users in the event of a car accident, thereby improving seat safety.

[0217] In some embodiments of this application, when at least a portion of the substrate 30 is deformed by a recess, at least one backrest module 20 deflects toward the recessed area of ​​the substrate 30.

[0218] For example, in Figure 41 In the process, when the elastic region 301 at the center of the substrate 30 is recessed away from the multiple backrest modules 20, the parts of the backrest modules 20 on the left and right sides that are close to the center of the substrate 30 move downward as they are recessed and deformed, while the parts that are away from the center of the substrate 30 tilt upward. Overall, the backrest modules 20 on the left and right sides are deflected toward the recessed area of ​​the substrate 30.

[0219] In some embodiments of this application, at least a portion of the substrate 30 located near the central axis may be recessed in a direction away from the plurality of backrest modules 20. For example, in Figures 33 to 35 When a force is applied to the elastic region 301, the center of the substrate 30 will be deformed by indentation; or, when a compressive force is applied to both sides of the substrate 30, the center of the substrate 30 will also be deformed by indentation.

[0220] It should be noted that the concave deformation of the substrate 30 can be caused by the force exerted on the substrate 30 by one or more backrest modules 20, or by the force exerted on the substrate 30 by other objects. This application does not impose any specific restrictions.

[0221] In some embodiments of this application, when multiple backrest modules 20 are subjected to force, at least one backrest module 20 rotates around a deflection axis or deflection center to adjust its posture; wherein, the second end of at least one air duct 12 is connected to the area of ​​the backrest module 20 near its deflection axis or deflection center.

[0222] For example, see Figure 42 , Figure 42 This illustration shows a cross-sectional view of the connection points between multiple backrest modules 20 and the substrate 30 and ventilation assembly 10 in an embodiment of this application. The first connecting portions 201 of the left and right backrest modules 20 are rotatably connected to rigid regions 302 on both sides of the substrate 30. The second connecting portions 202 of the left and right backrest modules 20 are elastically connected to the elastic region 301 at the center of the substrate 30. The deflection center of the left backrest module 20 is the rotation center of its first connecting portion 201, and the deflection center of the right backrest module 20 is the rotation center of its first connecting portion 201. The air duct 12 on the left side is connected to... The air duct 12 is connected to the area near the first connecting part 201 of the left backrest module 20, and the air duct 12 of the right backrest module 20 is connected to the area near the first connecting part 201 of the right backrest module 20. When the left and right backrest modules 20 deflect, it is known that the area near the first connecting part 201 of the backrest module 20 has the smallest displacement. Therefore, not only can the air duct 12 of the left and right sides produce a small amount of deformation, but it can also meet the requirement that the left and right backrest modules 20 produce a large deflection angle, so as to effectively buffer the driver or passenger in the event of a car accident and thus achieve car collision protection.

[0223] For example, see Figure 43 , Figure 43This paper shows another cross-sectional view of the connection between multiple backrest modules 20 and the substrate 30 and ventilation assembly 10 in an embodiment of this application. The first connecting portion 201 of the left and right backrest modules 20 is rotatably connected to the rigid regions 302 on both sides of the substrate 30, and the second connecting portion 202 of the left and right backrest modules 20 is elastically connected to the elastic region 301 at the center of the substrate 30. Since the air duct 12 on the left is connected to the region near the first connecting portion 201 of the left backrest module 20, and the air duct 12 on the right is connected to the region near the first connecting portion 201 of the right backrest module 20, not only can the air ducts 12 on the left and right be deformed, but the requirement for the left and right backrest modules 20 to generate a large deflection angle can also be met.

[0224] It should be noted that, in the embodiments of this application, "deflection axis" refers to the rotation axis of the backrest module 20 around its rotational connection when adjusting its posture. Generally, the backrest module 20 only has a "deflection axis" when it deflects through a hinge (e.g., a hinge). At the same time, in the embodiments of this application, "deflection center" refers to the rotation center of the backrest module 20 around its rotational connection when adjusting its posture. Generally, the backrest module 20 only has a "deflection center" when it deflects through a ball joint.

[0225] In some embodiments of this application, such as for an embodiment where at least one backrest module 20 has a first connection portion 201, the first connection portion 201 is configured to connect a rotating connector (e.g., a hinge or ball joint), and the second end of at least one duct 12 is connected to the area of ​​the backrest module 20 near the first connection portion 201.

[0226] For example, in Figure 42 In the middle, the left and right backrest modules 20 can be deflected by the rotating connector near the center of the base plate 30. The air duct 12 on the left is connected to the area near the first connection part 201 of the left backrest module 20, and the air duct 12 on the right is connected to the area near the first connection part 201 of the right backrest module 20, so as to reduce the deformation of the air duct 12 during the deflection movement of the backrest module 20.

[0227] For example, in Figure 43 In the middle, the left and right backrest modules 20 can be deflected by rotating the connector near the edge of the base plate 30. The air duct 12 on the left is connected to the area near the first connection part 201 of the left backrest module 20, and the air duct 12 on the right is connected to the area near the first connection part 201 of the right backrest module 20, so as to reduce the deformation of the air duct 12 during the deflection movement of the backrest module 20.

[0228] In some embodiments of this application, at least one backrest module 20 further has a second connecting portion 202, which is configured to connect to an elastic connector.

[0229] For example, in Figure 42 as well as Figure 43 In the middle, the second connecting part 202 of the backrest module 20 on the left and right sides is elastically connected to the elastic region 301 in the center of the base plate 30 by springs. The elastic force of the springs after being compressed and recovering deformation can restore the backrest module 20 to its normal position when it is no longer under force.

[0230] It is understood that the elastic connector is not limited to a compressed spring; in some possible embodiments, the elastic connector may also be a stretched spring or a rubber elastic element, etc.

[0231] In some embodiments of this application, at least one backrest module 20 includes a first support portion 203 and a second support portion 204; the first support portion 203 extends along a first direction, and the second support portion 204 extends along a second direction; wherein the first direction and the second direction are not parallel, and a first connecting portion 201 for connecting a rotating connector is located at the junction of the first support portion 203 and the second support portion 204.

[0232] For example, see Figure 44 , Figure 44 This diagram illustrates a top view of the backrest module 20 in an embodiment of this application. The second support portion 204 of the left backrest module 20 extends in a second direction perpendicular to the central axis of the substrate 30, while the first support portion 203 extends in a first direction deviating from the central axis of the substrate 30 and deflected at a certain angle. Similarly, the second support portion 204 of the right backrest module 20 extends in a second direction perpendicular to the central axis of the substrate 30, while the first support portion 203 extends in a first direction deviating from the central axis of the substrate 30 and deflected at a certain angle. Simultaneously, the first connecting portion 201 for rotatable connection between the left and right backrest modules 20 is located at the junction of the first support portion 203 and the second support portion 204. Therefore, the left and right backrest modules 20 can undergo greater angle of deflection and posture adjustment via the first connecting portion 201, thereby improving the user's comfort and providing better collision protection.

[0233] In some embodiments of this application, for example, in the embodiment where the first connecting portion 201 of the backrest module 20 for rotatable connection is located at the junction of the first support portion 203 and the second support portion 204, at least one second connecting portion 202 of the backrest module 20 may be located on the side of the second support portion 204 facing the substrate 30.

[0234] For example, see Figure 45 , Figure 45 This illustration shows another cross-sectional view of the connection points between multiple backrest modules 20 and the substrate 30 and ventilation assembly 10 in an embodiment of this application. The second connecting portion 202 of the left backrest module 20 for elastic connection is disposed on its second support portion 204 near the central axis of the substrate 30, and the second connecting portion 202 for elastic connection is located on the side of the second support portion 204 facing the substrate 30. The second connecting portion 202 of the right backrest module 20 for elastic connection is disposed on its second support portion 204 near the central axis of the substrate 30, and the second connecting portion 202 for elastic connection is located on the side of the second support portion 204 facing the substrate 30. This ensures that both the left and right backrest modules 20 have at least one first connecting portion 201 for rotatable connection and at least one second connecting portion 202 for elastic connection. The compression elastic deformation of the connecting spring can combine with the elastic deformation of the substrate 30, enabling multi-level buffering to further improve the vehicle collision protection effect in the event of a collision.

[0235] In some embodiments of this application, for example, in the embodiment where the first connecting portion 201 of the backrest module 20 for rotatable connection is located at the junction of the first support portion 203 and the second support portion 204, at least one second connecting portion 202 of the backrest module 20 is located on the side of the first support portion 203 facing the substrate 30.

[0236] For example, see Figure 46 , Figure 46 This illustration shows another cross-sectional view of the connection points between multiple backrest modules 20 and the substrate 30 and ventilation assembly 10 in an embodiment of this application. The second connecting portion 202 of the left-side backrest module 20 for elastic connection is disposed on its first support portion 203 away from the central axis of the substrate 30, and the second connecting portion 202 for elastic connection is located on the side of the first support portion 203 facing the substrate 30. The second connecting portion 202 of the right-side backrest module 20 for elastic connection is disposed on its first support portion 203 away from the central axis of the substrate 30, and the second connecting portion 202 for elastic connection is located on the side of the first support portion 203 facing the substrate 30. This allows both the left-side and right-side backrest modules 20 to have at least one first connecting portion 201 for rotatable connection and at least one second connecting portion 202 for elastic connection. The elastic deformation of the connecting spring can combine with the elastic deformation of the substrate 30, enabling multi-level buffering to further improve the vehicle collision protection effect in the event of a collision.

[0237] In some embodiments of this application, such as embodiments where multiple backrest modules 20 include a first side wing support module 21 and a second side wing support module 22, at least one air duct 12 includes a first air duct 121 and a second air duct 122; the first side wing support module 21 rotates about a first deflection axis to adjust its posture, and the second side wing support module 22 rotates about a second deflection axis to adjust its posture; wherein, the second end of the first air duct 121 is connected to the region of the first side wing support module 21 near its first deflection axis, and the second end of the second air duct 122 is connected to the region of the second side wing support module 22 near its second deflection axis.

[0238] For example, see Figure 47 , Figure 47 This illustration shows another connection diagram between the fan 11 assembly and multiple backrest modules 20 in an embodiment of this application. The first side wing support module 21 rotates around the first deflection axis to adjust its posture, and the second side wing support module 22 rotates around the second deflection axis to adjust its posture. Since the second end of the first air duct 121 is connected to the area of ​​the first side wing support module 21 near its first deflection axis, and the second end of the second air duct 122 is connected to the area of ​​the second side wing support module 22 near its second deflection axis, the deflection movement of the first side wing support module 21 and the second side wing support module 22 will not cause the first air duct 121 and the second air duct 122 to produce a large amount of deformation.

[0239] In some embodiments of this application, see further reference. Figure 47 The first side wing support module 21 and the second side wing support module 22 are located on both sides of the central axis of the seat back. When the seat back is under force, the first side wing support module 21 deflects towards the central axis of the seat back, and the second side wing support module 22 deflects towards the central axis of the seat back. The deflection directions of the first side wing support module 21 and the second side wing support module 22 are opposite to provide the user with a backrest-wrapped seating experience.

[0240] In some embodiments of this application, see Figure 48 , Figure 48 This paper shows another connection diagram of the fan 11 assembly and multiple backrest modules 20 in an embodiment of this application. The first air duct 121 and the second air duct 122 are connected to the same fan 11. The first air duct 121 and the second air duct 122 are symmetrically arranged with respect to the central axis of the seat back. This not only reduces the number of fans 11, but also ensures the uniformity of force on the ventilation assembly 10 by the symmetrical arrangement of the first air duct 121 and the second air duct 122.

[0241] In some embodiments of this application, such as embodiments where multiple backrest modules 20 also include a first end support module 23, at least one air duct 12 also includes a third air duct 123; the first end support module 23 is located at the first end of the seat back along the central axis direction, and the first end support module 23 rotates around a third deflection axis to adjust its posture; wherein, the second end of the third air duct 123 is connected to the area of ​​the first end support module 23 near its third deflection axis.

[0242] For example, see Figure 49 , Figure 49 This paper shows another connection diagram of the fan 11 assembly and multiple backrest modules 20 in an embodiment of this application. The first side wing support module 21 rotates around the third deflection axis to adjust its posture. Since the third air duct 123 is connected to the area of ​​the first end support module 23 near its third deflection axis, the deflection movement of the third side wing support module will not cause the third air duct 123 to produce a large amount of deformation.

[0243] In some embodiments of this application, see Figure 50 , Figure 50 This illustration shows another connection diagram between the fan 11 assembly and multiple backrest modules 20 in an embodiment of this application. At least one air duct 12 also includes a fourth air duct 124, the second end of which is connected to the area of ​​the first end support module 23 near its third deflection axis. That is, ventilation airflow can be provided to the first end support module 23 through the third air duct 123 and the fourth air duct 124, thereby increasing the air volume of the first end support module 23 and improving the heat dissipation effect on the user's back and neck. At the same time, since the fourth air duct 124 is connected to the area of ​​the first end support module 23 near its third deflection axis, the deflection movement of the third side wing support module will not cause a large deformation of the fourth air duct 124.

[0244] In some embodiments of this application, see further reference. Figure 50 The third air duct 123 and the fourth air duct 124 are connected to the same fan 11; wherein the third air duct 123 and the fourth air duct 124 are symmetrically arranged with respect to the central axis of the seat back, which can not only reduce the number of fans 11, but also ensure the uniformity of the force on the ventilation component 10 by the symmetrically arranged first air duct 121 and second air duct 122.

[0245] It is worth noting that the above description of the seat back is intended to clearly illustrate the verification process of this application. Those skilled in the art can make equivalent modifications or further designs under the guidance of this application. For example, the layout of the multiple backrest modules 20 can be modified in shape and layout according to user experience requirements; another example is that the setting of the elastic region 301 and rigid region 302 on the substrate 30 can be adaptively adjusted according to the shape and layout of the multiple backrest modules 20; yet another example is... (See also...) Figure 51 , Figure 51 Another exploded view of the seat back in the embodiment of this application is shown. The seat back may also include a backrest frame 40, a protective shell 50, and a headrest 60 fixed to the backrest frame 40. The backrest frame 40 is fixed to the base plate 30 to strengthen the overall structural strength of the seat, and the protective shell 50 prevents the backrest frame 40 from being exposed, thus achieving the aesthetics of the seat. The headrest 60 can provide head support for the user and further improve the comfort of the seat.

[0246] Furthermore, to better implement the seat backrest in the embodiments of this application, this application also provides a car seat based on the seat backrest, the car seat including the seat backrest of any of the above embodiments. Since the car seat in the embodiments of this application has all the beneficial effects of the seat backrest described above, it will not be repeated here.

[0247] Furthermore, to better implement the car seat in the embodiments of this application, this application also provides a car, which includes the car seat of the above embodiments. Exemplarily, the car may be, but is not limited to, a gasoline-powered car, a pure electric car, a hybrid electric car, a plug-in hybrid electric car, a range-extended electric car, and a fuel cell car. Since the car seat in the embodiments of this application has all the beneficial effects of the seat backrest described in the above embodiments, these effects will not be repeated here.

[0248] 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 detailed descriptions of other embodiments above, which will not be repeated here.

[0249] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0250] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0251] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the utility model, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0252] The above provides a detailed description of a seat back, a car seat, and a car provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A seat backrest, characterized in that, include: Ventilation components; Multiple backrest modules are mounted on a mounting base, and the multiple backrest modules are combined to form a seat back support; The ventilation component provides ventilation airflow to at least one of the backrest modules, and at least one of the backrest modules connected to the ventilation component has a heat dissipation and ventilation structure.

2. The seat back as described in claim 1, characterized in that, When multiple backrest modules are subjected to force, at least one of the backrest modules adjusts its posture.

3. The seat back as described in claim 2, characterized in that, The ventilation assembly connected to the backrest module, which adjusts its posture, has at least a portion of its structure conforming to the posture changes of the backrest module.

4. The seat back as described in claim 3, characterized in that, The ventilation assembly includes at least one fan and at least one duct. At least one of the air ducts has its first end connected to the fan, and at least one of the air ducts has its second end connected to the backrest module; At least one of the air ducts elastically deforms to adapt to the posture changes of the backrest module to which it is connected.

5. The seat back as described in claim 4, characterized in that, When multiple backrest modules are subjected to force, at least one backrest module rotates about the deflection axis or deflection center to adjust its posture. At least one of the air ducts has its second end connected to the area of ​​the backrest module near its deflection axis or deflection center.

6. The seat back as described in claim 5, characterized in that, At least one of the backrest modules has a first connecting portion, which is configured to connect to a rotating connector; At least one of the air ducts has its second end connected to the area near the first connection part of the backrest module.

7. The seat back as described in claim 6, characterized in that, At least one of the backrest modules includes a first support portion and a second support portion; The first support portion extends along a first direction, and the second support portion extends along a second direction; Wherein, the first direction is not parallel to the second direction, and the first connecting part for connecting the rotating connector is located at the junction of the first support part and the second support part.

8. The seat back as described in claim 7, characterized in that, At least one of the backrest modules further has a second connecting portion configured to connect to an elastic connector.

9. The seat back as described in claim 8, characterized in that, At least one of the second connecting portions of the backrest module is located on the first support portion; or At least one of the backrest modules has its second connecting portion located on the second support portion.

10. The seat back as described in claim 5, characterized in that, The plurality of backrest modules include a first side wing support module and a second side wing support module, and at least one of the air ducts includes a first air duct and a second air duct; The first side wing support module rotates around the first deflection axis to adjust its attitude, and the second side wing support module rotates around the second deflection axis to adjust its attitude. The second end of the first air duct is connected to the area of ​​the first side wing support module near its first deflection axis, and the second end of the second air duct is connected to the area of ​​the second side wing support module near its second deflection axis.

11. The seat back as described in claim 10, characterized in that, The first side wing support module and the second side wing support module are respectively located on both sides of the central axis of the seat back; When the seat back is subjected to force, the first side wing support module deflects towards the central axis of the seat back, and the second side wing support module deflects towards the central axis of the seat back.

12. The seat back as described in claim 10, characterized in that, The first air duct and the second air duct are connected to the same fan. The first air duct and the second air duct are arranged symmetrically with respect to the central axis of the seat back.

13. The seat back as described in claim 5, characterized in that, The plurality of backrest modules include a first end support module, and at least one of the air ducts also includes a third air duct; The first end support module is located at the first end of the seat back along the central axis, and the first end support module rotates around the third deflection axis to adjust its posture. The second end of the third duct is connected to the area of ​​the first end support module near its third deflection axis.

14. The seat back as described in claim 13, characterized in that, At least one of the aforementioned ducts also includes a fourth duct; The second end of the fourth duct is connected to the area of ​​the first end support module near its third deflection axis.

15. The seat back as described in claim 14, characterized in that, The third and fourth air ducts are connected to the same fan. The third and fourth air ducts are arranged symmetrically with respect to the central axis of the seat back.

16. The seat back as described in claim 1, characterized in that, The ventilation assembly includes at least one fan and at least one duct. Each of the air ducts is connected to the fan, and at least one of the backrest modules is connected to at least one of the air ducts.

17. The seat back as described in claim 16, characterized in that, Each of the aforementioned air ducts is connected to the air inlet of the fan.

18. The seat back as described in claim 16, characterized in that, Each of the aforementioned air ducts is connected to the air outlet of the fan.

19. The seat back as described in claim 16, characterized in that, Each of the aforementioned ducts is connected to the same aforementioned fan.

20. The seat back as described in claim 16, characterized in that, At least one of the air ducts is connected to the air inlet of the fan, and at least one of the air ducts is connected to the air outlet of the fan.

21. The seat back as described in any one of claims 16 to 20, characterized in that, At least one of the ducts includes a first sub-duct, a second sub-duct, and a duct joint; The first sub-tube extends at least partially along a first preset direction, and the second sub-tube extends at least partially along a second preset direction; Wherein, the first preset direction is not parallel to the second preset direction, and the pipe joint connects the first sub-pipe and the second sub-pipe.

22. The seat back as described in claim 1, characterized in that, The heat dissipation and ventilation structure includes a through hole penetrating the backrest module; and / or The backrest module includes a backrest foam body, and the heat dissipation and ventilation structure includes the pores of the backrest foam body.

23. The seat back as described in claim 1, characterized in that, The plurality of backrest modules include a first side wing support module and a second side wing support module; The first side wing support module and the second side wing support module are located on both sides of the central axis of the seat back.

24. The seat back as described in claim 1, characterized in that, The plurality of backrest modules include a plurality of first side wing support modules and a plurality of second side wing support modules; The first side wing support modules and the second side wing support modules are respectively located on both sides of the central axis of the seat back.

25. The seat back as described in claim 23 or 24, characterized in that, The plurality of backrest modules also include a first end support module; The first end support module is located at the first end of the seat back along the central axis.

26. The seat back as described in claim 23 or 24, characterized in that, The plurality of backrest modules also include a second end support module; The second end support module is located at the second end of the seat back along the central axis.

27. The seat back as described in claim 1, characterized in that, Each of the backrest modules includes a backrest support plate.

28. The seat back as described in claim 1, characterized in that, Each of the backrest modules includes a backrest support plate and a backrest foam body, the backrest foam body being mounted on the backrest support plate.

29. The seat back as described in claim 1, characterized in that, Each of the backrest modules includes a backrest support plate; At least two of the backrest support plates are configured to be mounted on the same backrest foam body.

30. The seat back as described in claim 1, characterized in that, The ventilation component is located inside the backrest module.

31. A car seat, characterized in that, Includes the seat back as described in any one of claims 1 to 30.

32. A car, characterized in that, Including the car seat as described in claim 31.

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