Automobile seat ventilation system with hardness adjusting function

Abstract

The utility model provides an automobile seat ventilation system with a hardness adjusting function. The automobile seat ventilation system is characterized in that a wind bag body is arranged on seat foam; a first space and a second space which are not communicated with each other are arranged in the wind bag body. The ventilation device is installed on the air bag body and used for driving air in the first space to circulate. The pressure adjusting assembly is used for adjusting the pressure of the air bag body so as to adjust the hardness of the air bag body. Based on the structural design, the ventilation function and the hardness adjusting function of the seat can be achieved, the space in the air bag body is fully utilized, and the space utilization rate of the automobile seat is increased.

Description

Technical Field

[0001] This utility model generally relates to the field of automotive seat technology, and specifically to an automotive seat ventilation system with adjustable firmness. Background Technology

[0002] In recent years, with the rapid development and popularization of the automotive industry, people have increasingly higher requirements for vehicle ride comfort. To improve the comfort of car seats, ventilation bags and adjustable cushions are installed inside the seats.

[0003] Ventilation bags provide airflow to the seats, helping to regulate seat temperature and reduce discomfort from long journeys. They also lower the seat surface temperature in hot weather, improving comfort. The ventilation bags circulate air, making the seat surface temperature more pleasant. Adjustable seat cushions allow drivers and passengers to adjust the firmness or softness of the seat to meet their individual preferences and comfort needs. These cushions can be placed above or below the seat, altering the seat's support structure and affecting the perceived firmness. The purpose of these cushions is to provide a degree of personalization, making the seat more suitable for the user's experience and preferences, thus improving comfort during long drives or journeys.

[0004] With the increasing emphasis on comfort features, the space available for car seat arrangements is becoming increasingly limited. Most of the space is occupied by mechanical structural components, which greatly restricts the arrangement space. How to meet the increased comfort features while improving the space utilization of car seats is a problem that urgently needs to be solved. Utility Model Content

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a car seat ventilation system with adjustable firmness.

[0006] This utility model provides a car seat ventilation system with adjustable firmness, wherein the car seat has a support surface for supporting the human body, including:

[0007] Seat foaming;

[0008] The air bag body is mounted on the seat foam; the air bag body has a first space and a second space that are not connected to each other, and the first space is connected to the external space of the seat foam on the side near the bearing surface.

[0009] A ventilation device is installed on the side of the air bag body away from the bearing surface and is connected to the first space to drive the gas to circulate in the first space.

[0010] A pressure regulating component, which is connected to the second space, is used to regulate the pressure within the second space to adjust the stiffness of the air bag body.

[0011] According to the technical solution provided by this utility model, the air bag body includes:

[0012] An air distribution layer is provided with a plurality of first ventilation holes; the first ventilation holes connect the first space and the space near the bearing surface.

[0013] A sealing layer is provided, which is sealed to the edge of the air distribution layer to form the first space between the air distribution layer and the sealing layer.

[0014] A stiffness adjustment body is disposed inside a first space and has multiple adjustment parts, and the adjustment parts have a second space inside; the second space is connected to the pressure adjustment assembly.

[0015] According to the technical solution provided by this utility model, the air bag body further includes an air guide layer, which is disposed between the softness and hardness adjustment body and the air distribution layer. The air guide layer is used to support the air distribution layer and the softness and hardness adjustment body, and to allow gas to pass through the interior of the air guide layer.

[0016] According to the technical solution provided by this utility model, a support body is also provided in the first space. The support body is provided with a plurality of support protrusions. The support body and the softness and hardness adjustment body are integrally formed, or the support body and the softness and hardness adjustment body are connected by a soft body.

[0017] According to the technical solution provided by this utility model, the air guide layer is provided with a plurality of receiving holes, which are used to accommodate the adjustment part and / or the support protrusion.

[0018] According to the technical solution provided by this utility model, a first connection hole is provided on the sealing layer;

[0019] The stiffness adjustment body or the support body has a second connection hole that is opposite to the first connection hole; the first connection hole and the second connection hole are connected by an annular adapter, and the annular adapter is fixedly connected to the ventilation device.

[0020] According to the technical solution provided by this utility model, the softness and hardness adjustment body has multiple bodies; the multiple softness and hardness adjustment bodies are arranged in at least partial overlap within the first space;

[0021] The air bag body also includes:

[0022] At least one first support plate is disposed between two adjacent stiffness adjustment bodies for supporting the two stiffness adjustment bodies;

[0023] The first support plate is also provided with a third connection hole that communicates with the ventilation device;

[0024] The stiffness adjustment body is also provided with a third ventilation hole that communicates with the first ventilation hole.

[0025] According to the technical solution provided by this utility model, the air bag body is disposed on the side of the seat foam close to the bearing surface, and the seat foam is provided with a breathable substrate.

[0026] The air bag body is disposed between the breathable substrate and the seat foam.

[0027] According to the technical solution provided by this utility model, the air bag body is disposed on the side of the seat foam away from the bearing surface, and a fourth ventilation hole is provided on the seat foam. The fourth ventilation hole is used to connect the first space with the space on the side of the seat foam away from the air bag body.

[0028] According to the technical solution provided by this utility model, the pressure regulating component includes an air circuit controller, the input end of which is connected to an air source, and the output end is connected to the second space through an air pipe.

[0029] The beneficial effects of this utility model are as follows:

[0030] The air bladder body is mounted on the seat foam; the air bladder body has a first space and a second space that are not interconnected. A ventilation device is installed on the air bladder body to facilitate the airflow within the first space. A pressure regulating component is used to adjust the pressure of the air bladder body to adjust its firmness. Based on the above structural design, not only are the ventilation and firmness adjustment functions of the seat satisfied, but the space within the air bladder body is also fully utilized, improving the space utilization rate of the car seat. Attached Figure Description

[0031] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0032] Figure 1 This is a schematic diagram of a car seat ventilation system with adjustable firmness.

[0033] Figure 2 This is a cross-sectional view of a car seat;

[0034] Figure 3 This is a schematic diagram of the wind bag itself;

[0035] Figure 4 A schematic diagram showing the connection relationship between the pressure regulating component and the air bag body;

[0036] Figure 5 This is a front view of the stiffness adjustment body;

[0037] Figure 6 This is a side view of the stiffness adjustment body;

[0038] Figure 7 An exploded view of the air bag body with the first type of air guide layer installed;

[0039] Figure 8 An exploded view of the air bag body with the second type of air guide layer installed;

[0040] Figure 9 An exploded view of the wind bag itself;

[0041] Figure 10 An exploded view of the wind bag itself;

[0042] Figure 11 Another schematic diagram of the wind bag body;

[0043] The components include: 1. Air bag body; 11. First ventilation hole; 12. Sealing layer; 121. First connecting hole; 13. Air distribution layer; 111. Weld; 2. Softness / hardness adjustment body; 21. Adjustment part; 212. Second connecting hole; 22. Support body; 23. Third ventilation hole; 24. Soft body; 221. Support protrusion; 3. Ventilation device; 4. Pressure adjustment component; 41. Air circuit controller; 42. Air source; 5. Annular adapter; 6. Air guide layer; 7. First support plate; 72. Second ventilation hole; 73. Third connecting hole; 8. Seat foam; 9. Breathable substrate; 10. Fourth ventilation hole. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0045] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] Please refer to Figure 1-2 This utility model provides a car seat ventilation system with adjustable firmness, wherein the car seat has a support surface for supporting the human body (generally the upper surface of the seat cover), including:

[0047] Seat foaming 8;

[0048] The air bag body 1 is mounted on the seat foam 8; the air bag body 1 has a first space and a second space that are not connected to each other, and the first space is connected to the external space of the seat foam 8 on the side near the bearing surface.

[0049] Ventilation device 3 is installed on the side of the air bag body 1 away from the bearing surface and is connected to the first space to drive the gas to circulate in the first space.

[0050] Pressure regulating component 4 is connected to the second space and is used to regulate the pressure in the second space to adjust the hardness of the air bag body 1.

[0051] Specifically, the ventilation device 3 mainly includes a fan, and other devices can also be installed according to the actual situation, such as a ventilation pipe connecting the fan and the first connection hole 121.

[0052] Based on the above structural design, the first space and the second space are not connected to each other. Therefore, it can not only meet the ventilation function and firmness adjustment function of the seat, but also make full use of the space inside the air bag body, thus improving the space utilization rate of the car seat.

[0053] Further, refer to Figure 3-6 The air bag body 1 includes:

[0054] An air distribution layer 13 is provided with a plurality of first ventilation holes 11; the first ventilation holes 11 connect the first space and the space near the bearing surface.

[0055] A sealing layer 12 is sealed to the edge of the air distribution layer 13 so that the first space is formed between the air distribution layer 13 and the sealing layer 12;

[0056] The hardness adjustment body 2 is disposed inside the first space and has multiple adjustment parts 21, and the adjustment parts 21 have a second space inside; the second space is connected to the pressure adjustment component 4.

[0057] Specifically, the stiffness adjustment body 2 is a bag with an independent cavity located inside the air bag body. Its internal air pressure can be adjusted by the pressure adjustment component 4. Multiple adjustment parts 21 are provided on the side of the body near the air distribution layer 13. The multiple adjustment parts 21 are arranged in an array, and each adjustment part 21 is a plurality of protrusions provided on the side near the air distribution layer. The shape of the adjustment part 21 can be designed according to actual needs, and its cross-section can be circular, rectangular, or other shapes.

[0058] In use, the pressure adjustment component 4 connected to the second space can be used to increase the air pressure in the second space. The adjustment part 21 will expand and lift up, forming a crisscrossing air duct.

[0059] refer to Figure 5 The softness and hardness adjustment body 2 is provided with a second connecting hole 212 for airflow to pass through. When ventilation is required, the ventilation device 3 can be opened so that the airflow blown out by the ventilation device 3 can pass through the air duct formed by the gap between the adjustment parts 21 and be guided to each of the first ventilation holes 11.

[0060] Under the inflation action of the pressure regulating component 4, the air pressure in the internal second space of the multiple regulating parts 21 on the softness and hardness regulating body 2 changes, thereby changing the overall softness and hardness of the air bag body 1.

[0061] Furthermore, the air bag body 1 also includes an air guide layer 6, which is disposed between the softness and hardness adjustment body 2 and the air distribution layer 13. The air guide layer 6 is used to support the air distribution layer 13 and the softness and hardness adjustment body 2, and to allow gas to pass through the interior of the air guide layer.

[0062] In the first embodiment, refer to Figure 7 The air guide layer 6 uses a material that has a certain degree of support and can guide the airflow. It is usually made of 3D spacer fabric, which has several woven mesh holes and a certain thickness, providing good air permeability and support.

[0063] The air guide layer 6 provides support for the air distribution layer 13 and further improves the uniformity of airflow, so that the ventilation function is not limited by the stiffness adjustment body 2. When the adjustment part 21 is retracted, the air guide layer 6 can also provide stable ventilation.

[0064] Furthermore, a support body 22 is also provided in the first space. The support body 22 is provided with a plurality of support protrusions 221. The support body 22 is integrally formed with the softness and hardness adjustment body 2, or the support body 22 and the softness and hardness adjustment body 2 are connected through a soft body 24.

[0065] The support protrusion 221 has a certain degree of rigidity and can provide a certain degree of support for the air distribution layer 13, so that there is a gap between the support body 22 and the air distribution layer 13, which facilitates airflow and improves the ventilation effect when the adjustment part 21 is contracted. At the same time, it provides deformation space for the adjustment part 21 on the support body 22.

[0066] Of course, the air guide layer 6 can be used alone without the support body 22 to save costs, or it can be used simultaneously with the support body 22 to ensure stable ventilation effect.

[0067] In the second implementation, refer to Figure 8 The air guide layer 6 has multiple receiving holes 61, which are used to accommodate the adjustment part 21 and / or the support protrusion 221. This reduces the overall thickness of the air bag body 1.

[0068] The receiving hole 61 can also avoid the adjustment part 21, which can make the surface of the air bag body 1 smoother and reduce the feeling of foreign objects when passengers ride.

[0069] Secondly, it can also support the adjustment part 21, preventing the adjustment part 21 from being difficult to inflate due to external pressure; it facilitates the control of the air pressure of the adjustment part 21, thereby enabling convenient and precise control of the softness and hardness of the softness and hardness adjustment body 2. When the air guide layer 6 and the support body 22 are used simultaneously, a receiving hole 61 that matches the shape of the support protrusion 221 can also be provided to avoid the support protrusion 221.

[0070] In some embodiments, the stiffness adjustment body 2 and the support body 22 are integrally formed;

[0071] Alternatively, the stiffness adjustment body 2 and the support body 22 are separate components, connected by a flexible body 24.

[0072] Specifically, when an integrated design is adopted, the interior of the support body 22 is connected to the second space inside the hardness adjustment body 2, meaning they form a single bag, which saves one process step. Simultaneously, with a good seal, the support protrusion 221 on the support body 22 can further lift up when the pressure of the hardness adjustment body 2 increases, improving the adjustment effect. Especially at the second connecting hole 212, the hardness adjustment body 2 must be firmly welded or bonded to prevent airflow from the ventilation device 3 from entering the second space and affecting the hardness adjustment function.

[0073] If a split design is adopted, the support body 22 is a sheet structure made of a material with a certain hardness, and the second connecting hole 212 can be set on the support body 22; this can prevent the airflow blown out by the ventilation device 3 from entering the second space, thereby affecting the softness and hardness adjustment function.

[0074] like Figure 6 As shown, the stiffness adjustment body 2 and the support body 22 can be connected by a flexible body 24. The flexible body 24 has a certain degree of adhesion, such as an adhesive film, to prevent relative movement between the stiffness adjustment body 2 and the support body 22. The shape of the adhesive film can be set according to the actual situation. It can match the outer contour of the stiffness adjustment body 2 and the support body 22, or it can be other shapes that can reliably fix the two together. Of course, other methods such as welding can also be used for connection, which are not limited in this application.

[0075] Specifically, the integrated or split structure can be applied to different usage scenarios, and users can choose freely according to their needs.

[0076] In some embodiments, the hardness adjustment body 2 includes a hardness adjustment film, the adjustment part 21 is disposed on the hardness adjustment film, the edge of the hardness adjustment film is sealed to the edge of the sealing layer 12, and a second space is formed between the hardness adjustment film and the sealing layer 12.

[0077] Specifically, the hardness adjustment body 2 has a membrane structure with an adjustment body 21. Its edge is sealed firmly to the edge of the sealing layer 12 by welding or bonding to form a second space, thereby further saving costs. Of course, the hardness adjustment membrane also needs to have a connection hole for connecting the ventilation device 3. Moreover, the hardness adjustment membrane and the sealing layer 12 around the connection hole should also be welded or bonded to prevent the airflow of the ventilation device 3 from blowing into the second space and affecting the hardness adjustment function.

[0078] To complement the seat's ventilation function, this utility model also features the following design:

[0079] Further, refer to Figure 9 The sealing layer 12 has a first connection hole 121.

[0080] The stiffness adjustment body 2 or the support body 22 is provided with a second connection hole 212 that is opposite to the first connection hole 121; the first connection hole 121 and the second connection hole 212 are connected by an annular adapter 5, and the annular adapter 5 is fixedly connected to the ventilation device 3.

[0081] Specifically, the fan allows air from outside the first space to flow through the annular adapter 5 to the side of the softness / hardness adjustment body 2 near the air distribution layer 13, and then be discharged from the first ventilation hole 11 to ventilate the seat surface.

[0082] Further, refer to Figure 10 The hardness adjustment body 2 has multiple components; the multiple hardness adjustment bodies 2 are arranged in a manner that at least partially overlaps within the first space;

[0083] Because of the overlapping soft and hardness adjustment bodies 2, the internal pressure of each soft and hardness adjustment body 2 can be adjusted independently. Passengers can control and adjust the internal pressure of different soft and hardness adjustment bodies 2 according to their own needs, so as to realize the soft and hardness adjustment function of multiple levels.

[0084] Specifically, since multiple stiffness adjustment elements 2 are overlapped, if a supporting structure is not provided between them, they will become misaligned after prolonged use. To reduce this, the air bag body 1 further includes:

[0085] At least one first support plate 7 is disposed between two adjacent softness / hardness adjustment bodies 2 for supporting the two softness / hardness adjustment bodies 2.

[0086] The first support plate 7 is also provided with a third connection hole 73 that communicates with the ventilation device 3;

[0087] The stiffness adjustment body 2 is also provided with a third ventilation hole 23 that communicates with the first ventilation hole 11.

[0088] Furthermore, the first support plate 7 is provided with a plurality of second ventilation holes 72, and the softness and hardness adjustment body 2 is provided with a plurality of third ventilation holes 23; the third ventilation holes 23 are provided in correspondence with the second ventilation holes 72.

[0089] The first support plate 7 is an elastic plate-like structure that can support the two adjacent softness and hardness adjustment bodies 2 without being too hard and causing discomfort to the human body.

[0090] Specifically, within the airbag body 1, multiple softness and hardness adjustment bodies 2 are stacked along its thickness direction. The internal pressure of each softness and hardness adjustment body 2 can be adjusted independently. Passengers can control and adjust the internal pressure of different softness and hardness adjustment bodies 2 according to their own needs to achieve a multi-level softness and hardness adjustment function.

[0091] The first support plate 7 is a rigid support plate set between two adjacent soft and hardness adjustment bags 2. The first support plate 7 can be fixed to the two adjacent soft and hardness adjustment bodies 2 by welding or pasting, etc., and its purpose is to provide support for the soft and hardness adjustment bodies 2 on both sides.

[0092] It should be noted that when multiple stacked stiffness adjustment bodies 2 are provided inside the air bag body 1, the fan can be connected to the first connecting hole 121 only through the annular adapter 5. The second connecting hole 212 on the stiffness adjustment body 2 and the third connecting hole 73 on the first support plate 7 are used only as ventilation holes to prevent the fan from affecting the lifting of the adjustment body 21. Moreover, the airflow blown by the fan can also be blown to one side of the air distribution layer 13 through the third ventilation hole 23 on the stiffness adjustment body 2 and the second ventilation hole 72 on the first support plate 7, making the ventilation effect more uniform.

[0093] In addition, multiple softness and hardness adjustment bodies 2 can be arranged sequentially along the length or width of the air bag body 1 to achieve independent adjustment of different areas of the seat. This application does not impose any special limitations on this.

[0094] Multiple ventilation holes are provided on the adjustable bag body and rigid support plate to ensure that the airflow from the fan can flow evenly to each ventilation hole.

[0095] The above structural design facilitates the flow of air in the first space, allowing the airflow generated by the ventilation device 3 to be blown more evenly to one side of the air distribution layer, thereby improving the ventilation effect and stability.

[0096] The second ventilation hole 72 and the third ventilation hole 23 are provided correspondingly to each other to allow gas to flow. The first support plate 7 has a third connecting hole 73 corresponding to the second connecting hole 212, and the third connecting hole 73 is used to connect with the annular adapter 5.

[0097] To prevent air leakage between the first and second spaces, the following design was also implemented:

[0098] refer to Figure 11 The edges of the air distribution layer 13 and the third ventilation hole 23 are each provided with weld beads 111 for welding to the sealing layer 12 to fix the relative position between the sealing layer 12 and the air distribution layer 13. Gas can then flow through the first support plate 7.

[0099] Specifically, the car seat ventilation system with adjustable firmness can be installed on side A of the seat foam 8, that is, the side of the seat foam 8 closest to the human body.

[0100] In some embodiments, the air bag body 1 is disposed on the side of the seat foam 8 near the bearing surface, and the seat foam 8 is provided with a breathable substrate 9 covering the air bag body 1, the breathable substrate 9 being used to form a seat cover; the air bag body 1 is disposed between the breathable substrate 9 and the seat foam 8.

[0101] In this case, the seat foam 8 needs to be provided with an installation groove to accommodate the ventilation device 3. The ventilation device 3 can be a fan and a ventilation pipe connecting the fan and the first space, so that the airflow blown out from the ventilation device 3 can pass through the air bag body 1 and the breathable substrate 9 in sequence and blow onto the seat surface.

[0102] In other embodiments, the air bag body 1 is disposed on the side of the seat foam 8 away from the bearing surface, and the seat foam 8 is provided with a fourth ventilation hole 10, which is used to connect the first space with the space on the side of the seat foam 8 away from the air bag body 1.

[0103] Specifically, the car seat ventilation system with adjustable firmness provided by this utility model can also be installed on the B side of the seat foam 8, that is, the side of the seat foam 8 away from the human body.

[0104] Furthermore, the seat foam 8 has a plurality of fourth ventilation holes 10, which correspond to the first ventilation holes 11, so that the gas flowing out of the ventilation bag with adjustable softness and hardness flows from the fourth ventilation holes 10 to the surface of the seat foam 8.

[0105] Furthermore, the pressure regulating component 4 includes an air circuit controller 41, the input end of which is connected to an air source 42, and the output end is connected to the second space through an air pipe.

[0106] The gas source 42 drives the gas to move, and the gas is delivered to the second space by the gas circuit controller 41 to complete the adjustment of the softness and hardness.

[0107] The air source 42 is an air pump used to inflate the second space. The air circuit controller 41 can be equipped with control devices such as solenoid valves. There can be multiple solenoid valves to control the internal pressure of multiple softness and hardness adjustment bodies 2. By controlling the amount of gas in the second space through the air circuit controller 41, the functions of inflating, deflating or maintaining pressure of the softness and hardness adjustment body 2 can be realized, thereby adjusting the deformation of the adjustment part 21, so as to realize the adjustment of the softness or hardness of the seat foam 8.

[0108] Specifically, the air bag body 1 can also be set in the backrest position, or in both positions simultaneously.

[0109] Working principle:

[0110] After the ventilation device 3 is started, it drives the gas to move. The gas enters the first space from the external space through the first connecting hole 121 and the second connecting hole 212, and moves to the outside through the first ventilation hole 11, thereby completing the ventilation function.

[0111] The pressure regulating component 4 can regulate the air pressure in the second space of the air bag body 1, thereby adjusting the softness and hardness of the air bag body 1.

[0112] Based on the above structural design, both ventilation and adjustable seat firmness are achieved. During use, the seat firmness and ventilation effect can be adjusted simultaneously, improving the comfort of riding.

[0113] The car seat ventilation system with adjustable firmness provided in this application includes an air bag body 1, which has a first space inside. A plurality of first ventilation holes 11 communicating with the first space are opened on one side of the air bag body 1. The air bag body 1 is also connected to a ventilation device 3, which enables airflow in the first space to flow and be discharged from the first ventilation holes 11, thereby providing ventilation for the seat.

[0114] Since a firmness adjustment body 2 is provided in the first space, the firmness adjustment body 2 has a second space and a plurality of adjustment parts 21. The adjustment parts 21 are connected to the second space. A pressure adjustment component 4 is also connected in the second space of the firmness adjustment body 2. The pressure in the second space can be adjusted by the pressure adjustment component 4, thereby causing the adjustment parts 21 to deform to adjust the firmness or softness of the seat.

[0115] This application integrates ventilation and firmness adjustment functions through an integrated design, avoids mutual interference between functions caused by the stacking of independent structures, makes full use of the first space inside the air bag body 1, improves the space utilization of the seat foam 8, reduces the number of parts and seat thickness, facilitates seat shape design, and saves costs.

[0116] It should be noted that in the above embodiments, the airflow direction during ventilation is described using a blowing fan as an example. In other embodiments, a suction fan can also be used, and its airflow direction is opposite to that of the blowing fan. This application does not make any specific limitation here.

[0117] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this utility model is not limited to the specific combination of the above-described technical features, but should also cover other technical solutions formed by any combination of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this utility model.

Claims

1. A car seat ventilation system with adjustable firmness, wherein the car seat has a support surface for supporting the human body, characterized in that, include: Seat foaming (8); The air bag body (1) is set on the seat foam (8); the air bag body (1) has a first space and a second space that are not connected to each other, and the first space is connected to the external space of the seat foam (8) on the side close to the bearing surface. Ventilation device (3), the ventilation device (3) is installed on the side of the air bag body (1) away from the bearing surface and is connected to the first space, for driving the gas to circulate in the first space; Pressure regulating component (4), which is connected to the second space, is used to regulate the pressure in the second space to adjust the hardness of the air bag body (1).

2. The automotive seat ventilation system with adjustable firmness according to claim 1, characterized in that, The air bag body (1) includes: An air distribution layer (13) is provided with a plurality of first ventilation holes (11); the first ventilation holes (11) connect the first space and the space near the bearing surface. A sealing layer (12) is sealed to the edge of the air distribution layer (13) so that the first space is formed between the air distribution layer (13) and the sealing layer (12); The softness and hardness adjustment body (2) is disposed inside the first space and has multiple adjustment parts (21), and the adjustment parts (21) have a second space inside; the second space is connected to the pressure adjustment component (4).

3. A car seat ventilation system with adjustable firmness according to claim 2, characterized in that, The air bag body (1) also includes an air guide layer (6), which is disposed between the softness and hardness adjustment body (2) and the air distribution layer (13). The air guide layer (6) is used to support the air distribution layer (13) and the softness and hardness adjustment body (2) and to allow gas to pass through the interior of the air guide layer.

4. A car seat ventilation system with adjustable firmness according to claim 3, characterized in that, The first space is also provided with a support body (22), and the support body (22) is provided with a plurality of support protrusions (221). The support body (22) and the softness and hardness adjustment body (2) are integrally formed, or the support body (22) and the softness and hardness adjustment body (2) are connected by a soft body (24).

5. A car seat ventilation system with adjustable firmness according to claim 4, characterized in that, The air guide layer (6) has a plurality of receiving holes (61) for accommodating the adjustment part (21) and / or the support protrusion (221).

6. A car seat ventilation system with adjustable firmness according to claim 4, characterized in that, The sealing layer (12) has a first connection hole (121); The hardness adjustment body (2) or the support body (22) is provided with a second connection hole (212) that is opposite to the first connection hole (121); the first connection hole (121) and the second connection hole (212) are connected by an annular adapter (5), and the annular adapter (5) and the ventilation device (3) are fixedly connected.

7. A car seat ventilation system with adjustable firmness according to claim 2, characterized in that, The hardness adjustment body (2) has multiple parts; the multiple hardness adjustment bodies (2) are arranged in a manner that at least partially overlaps within the first space; The air bag body (1) also includes: At least one first support plate (7) is disposed between two adjacent softness and hardness adjustment bodies (2) for supporting the two softness and hardness adjustment bodies (2). The first support plate (7) is also provided with a third connection hole (73) that communicates with the ventilation device (3); The hardness adjustment body (2) is also provided with a third ventilation hole (23) that communicates with the first ventilation hole (11).

8. A car seat ventilation system with adjustable firmness according to claim 2, characterized in that, The air bag body (1) is disposed on the side of the seat foam (8) near the bearing surface, and the seat foam (8) is provided with a breathable substrate (9). The air bag body (1) is disposed between the breathable substrate (9) and the seat foam (8).

9. A car seat ventilation system with adjustable firmness according to claim 2, characterized in that, The air bag body (1) is located on the side of the seat foam (8) away from the bearing surface. A fourth ventilation hole (10) is provided on the seat foam (8). The fourth ventilation hole (10) is used to connect the first space with the space on the side of the seat foam (8) away from the air bag body (1).

10. A car seat ventilation system with adjustable firmness according to claim 1, characterized in that, The pressure regulating component (4) includes an air circuit controller (41), the input end of which is connected to an air source (42), and the output end is connected to the second space through an air pipe.

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