Pneumatic bag and car seat

Abstract

This application provides a pneumatic airbag and a car seat. The pneumatic airbag includes at least three sub-airbags stacked along a first direction. At least one air vent for exchanging gas with the outside is provided on one of the end sub-airbags. A gas channel connects adjacent sub-airbags. Each sub-airbag has a first side and a second side distributed along the first direction. The gas channel connected to the first side of the same sub-airbag forms a first orthographic projection on a standard plane, and the gas channel connected to the second side forms a second orthographic projection on the standard plane. The overlap area of ​​the first and second orthographic projections is greater than zero and less than the area of ​​the first and / or the area of ​​the second orthographic projection. The first direction is perpendicular to the standard plane. This application employs a discontinuous, continuous airflow structure, avoiding the instantaneous bursting of intermediate airbags and solving the problem of brief abnormal noise during the inflation of the pneumatic airbag.

Description

Technical Field

[0001] This application relates to the field of automotive seat technology, and more particularly to a pneumatic airbag and an automotive seat. Background Technology

[0002] Because the traditional double-layered airbag seat pneumatic massage top pressure stroke was relatively small, it could no longer meet the requirements of passenger comfort. Consequently, pneumatic airbag products with three or more layers of sub-body airbags emerged on the market, providing a better massage comfort experience for vehicle occupants and gaining market acceptance.

[0003] Pneumatic airbags with three or more sub-units on the market are constructed by welding the individual sub-units together to form a multi-layered airbag. A through-hole connects the various sub-units for airflow. The structural features are: the first layer of the airbag has at least one air tube for inflation and deflation under the control of an airflow valve; the first layer is connected to the other layers by a through-hole forming a continuous, equal-diameter airflow path. One advantage of this design is that when welding the connecting holes between the airbag sub-units using a mold, the stacked welding mold is easier to arrange, resulting in a simpler manufacturing process.

[0004] However, in actual vehicle seat massage applications, the aforementioned traditional multi-layered airbags often produce a brief, unusual noise during inflation due to the large airflow, causing discomfort to the seat user. Please refer to [link / reference needed]. Figure 1 and Figure 2 The brief abnormal noise was caused by the following: When sub-gas bag #1 inflated and opened, the airflow passed through the holes between the layers and directly impacted the top surface of sub-gas bag #3, causing it to open and inflate. After sub-gas bags #1 and #3 inflated and opened, sub-gas bag #2 was under negative pressure relative to sub-gas bags #1 and #3 due to compression and had not yet opened. As sub-gas bags #1 and #3 continued to inflate and expand, under stronger injection pressure, airflow began to flow into the area around the vents of sub-gas bag #2, creating an opening. At this point, airflow entered sub-gas bag #2 and it opened. At this moment, the occupant's body squeezes the already inflated airbag through the seat cover. The already inflated bottom layer 1# and 3# sub-airbags together instantly replenish the newly opened 2# sub-airbag (at this time, 1# and 3# sub-airbags will briefly retract). Combined with the airflow from the trachea, the 2# sub-airbag rapidly expands, causing a burst sound as the airbag pops open.

[0005] To address the problem of brief abnormal noises generated during the inflation process of airbags in existing technologies, this application proposes a pneumatic airbag and a car seat. Summary of the Invention

[0006] The purpose of this application is to address the above problems by providing a pneumatic airbag and a car seat.

[0007] In a first aspect, this application provides a pneumatic bladder, comprising at least three sub-bladders stacked along a first direction; one of the sub-bladders located at an end is provided with at least one air port for exchanging gas with the outside; a gas channel is connected between two adjacent sub-bladders; each sub-bladder has a first side and a second side distributed along the first direction; the gas channel connected to the first side of the same sub-bladder forms a first orthographic projection on a standard plane, and the gas channel connected to the second side forms a second orthographic projection on the standard plane; the overlapping area of ​​the first orthographic projection and the second orthographic projection is greater than zero and less than the area of ​​the first orthographic projection and / or the area of ​​the second orthographic projection; the first direction is perpendicular to the standard plane.

[0008] According to the technical solutions provided in certain embodiments of this application, the area of ​​the first orthographic projection is equal to the area of ​​the second orthographic projection; the first orthographic projection and the second orthographic projection partially overlap.

[0009] According to the technical solutions provided in certain embodiments of this application, the area of ​​the first orthographic projection is not equal to the area of ​​the second orthographic projection; the first orthographic projection and the second orthographic projection partially overlap or completely overlap.

[0010] According to the technical solutions provided in certain embodiments of this application, along the first direction and away from the air inlet, the ventilation area of ​​each gas channel gradually decreases or gradually increases.

[0011] According to the technical solutions provided in certain embodiments of this application, the ventilation area of ​​the gas channel connected to one side of the same sub-gas bag body is less than or equal to half of the ventilation area of ​​the gas channel connected to the other side.

[0012] According to the technical solutions provided in certain embodiments of this application, the gas channel includes at least one sub-channel.

[0013] According to the technical solutions provided in certain embodiments of this application, the number of sub-channels included in the gas channels that are connected to both sides of the same sub-gas bag body is the same.

[0014] According to the technical solutions provided in certain embodiments of this application, the number of sub-channels included in the gas channels connected to both sides of the same sub-gas bag body is different, and the ventilation area of ​​each sub-channel is the same.

[0015] According to the technical solutions provided in certain embodiments of this application, the number of sub-channels included in the gas channels connected to both sides of the same sub-gas bag body is different, and the ventilation area of ​​each sub-channel is not exactly the same.

[0016] According to the technical solutions provided in certain embodiments of this application, along the first direction and away from the gas port, the number of sub-channels included in each gas channel decreases sequentially.

[0017] According to the technical solutions provided in certain embodiments of this application, the pneumatic bag body includes at least four sub-airbag bodies stacked along the first direction; along the first direction and away from the air inlet, the number of sub-channels included in each gas channel decreases sequentially in an arithmetic sequence.

[0018] According to the technical solutions provided in certain embodiments of this application, the sub-airbag body includes two elastic surface layers; the edges of the two elastic surface layers are welded together; ventilation holes are opened at corresponding positions on the elastic surface layers of two adjacent sub-airbag bodies that are close to each other; the elastic surface layers around the two ventilation holes at corresponding positions are fused to form the gas channel.

[0019] According to the technical solutions provided in certain embodiments of this application, the elastic surface layer around the gas channel is provided with an uneven structure.

[0020] Secondly, this application provides an automobile seat, including a pneumatic bladder as described in any of the preceding claims, and further including a seat frame, seat foam, seat cover, air hose assembly, air source, and control valve; the pneumatic bladder is disposed between the seat cover and the seat foam, or between the seat foam and the seat frame; the air port of the pneumatic bladder is connected to the air source and the control valve through the air hose assembly.

[0021] Compared with the prior art, the beneficial effects of this application are as follows: The pneumatic bladder provided by this application includes at least three stacked sub-airbags. One of the sub-airbags at the end is connected to an air port, and its projection on a standard plane overlaps with the projection of the gas channels connected to both sides of the same sub-airbag. The overlapping area is less than the area of ​​at least one of the two projections, thus forming a discontinuous and continuous airway structure. By adopting the above-mentioned airway structure, it is avoided that all the gas injected into the bottom airbag directly rushes to the top surface of the top airbag. This also avoids the bottom and top sub-airbags opening first, and the sandwich compression effect formed by the upper and lower sub-airbags on the middle sub-airbag. It also avoids the sudden expansion of the middle airbag when it opens under compression, avoids the air burst noise generated by the rapid inflation of the airbag, reduces noise and abnormal sounds, and helps to provide a better massage comfort experience for vehicle occupants. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a pneumatic bladder in the prior art;

[0023] Figure 2 A schematic diagram of the inflation process of a pneumatic bladder in the prior art;

[0024] Figure 3 This is a schematic diagram of the structure of the pneumatic bladder provided in Embodiment 1 of this application;

[0025] Figure 4 A schematic diagram showing the relationship between the first and second orthographic projections of the pneumatic bladder provided in Embodiment 1 of this application;

[0026] Figure 5 for Figure 3 A magnified view of part A in the middle;

[0027] Figure 6 A schematic diagram showing the relationship between the first and second orthographic projections of the pneumatic bladder provided in Embodiment 2 of this application;

[0028] Figure 7 A schematic diagram showing the relationship between the first and second orthographic projections of the pneumatic bladder provided in Embodiment 3 of this application;

[0029] Figure 8 This is a schematic diagram of the structure of the pneumatic bladder (flattened state) provided in Embodiment 4 of this application;

[0030] Figure 9 This is a schematic diagram showing the relationship between the first and second orthographic projections of the pneumatic bladder provided in Embodiment 4 of this application;

[0031] Figure 10 This is a schematic diagram of the inflation process of the pneumatic bladder provided in Embodiment 4 of this application;

[0032] Figure 11 This is a schematic diagram of the structure of the pneumatic bladder (flattened state) provided in Embodiment 5 of this application;

[0033] Figure 12 This is a schematic diagram of the inflation process of the pneumatic bladder provided in Embodiment 5 of this application;

[0034] Figure 13 This is a schematic diagram of the structure of the pneumatic bladder (flattened state) provided in Embodiment 6 of this application;

[0035] Figure 14 This is a schematic diagram of the inflation process of the pneumatic bladder provided in Embodiment 6 of this application;

[0036] Figure 15 This is a schematic diagram of the structure of the pneumatic bladder (flattened state) provided in Embodiment 7 of this application;

[0037] Figure 16 This is a schematic diagram of the structure of the pneumatic bladder (flattened state) provided in Embodiment 8 of this application;

[0038] Figure 17 This is a structural schematic diagram of the car seat (without a vibrator) provided in Embodiment 9 of this application;

[0039] Figure 18 This is a structural schematic diagram of a car seat (with a vibrator) provided in Embodiment 9 of this application;

[0040] Figure 19 This is a side view of the car seat (without inflated airbag) provided in Embodiment 9 of this application.

[0041] Figure 20 This is a side view of the car seat (inflated state of the pneumatic bladder) provided in Embodiment 9 of this application.

[0042] The text labels in the image represent:

[0043] 1. Pneumatic airbag body; 101. First sub-airbag body; 102. Second sub-airbag body; 103. Third sub-airbag body; 104. Fourth sub-airbag body; 201. First gas channel; 202. Second gas channel; 203. Third gas channel; 204. First orthographic projection; 205. Second orthographic projection; 3. Air inlet; 4. Seat; 401. Seat cushion; 402. Backrest; 5. Vibrator; 6. Seat foam; 7. Control valve; 8. Air source; 9. Wiring harness; 10. Control switch; 11. Air tube assembly; 12. Seat cover. Detailed Implementation

[0044] To enable those skilled in the art to better understand the technical solution of this application, the application will be described in detail below with reference to the accompanying drawings. The description in this section is only exemplary and explanatory, and should not be used to limit the scope of protection of this application.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "clockwise," "counterclockwise," "front end," "rear end," and "side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the disclosed product is in use. They are only for the convenience of describing this disclosure 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 disclosure. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0048] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," "join," and "dock" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0049] Example 1

[0050] Please refer to Figure 3 This embodiment provides a pneumatic bag body, including at least three sub-bag bodies stacked along a first direction; one of the sub-bag bodies located at the end is provided with at least one air port for exchanging gas with the outside; a gas channel is connected between two adjacent sub-bag bodies; each sub-bag body has a first side and a second side distributed along the first direction; the gas channel connected to the first side of the same sub-bag body forms a first orthographic projection on a standard plane, and the gas channel connected to the second side forms a second orthographic projection on the standard plane; the overlapping area of ​​the first orthographic projection and the second orthographic projection is greater than zero and less than the area of ​​the first orthographic projection and / or the area of ​​the second orthographic projection; the first direction is perpendicular to the standard plane.

[0051] Furthermore, the area of ​​the first orthographic projection is not equal to the area of ​​the second orthographic projection; the first orthographic projection and the second orthographic projection completely overlap.

[0052] Specifically, the sub-airbag body includes upper and lower elastic surface layers; the edges of the two elastic surface layers are welded together, and gas channels are formed on the elastic surface layers of adjacent sub-airbag bodies on the side closest to each other; in this embodiment, the pneumatic bag body includes three sub-airbag bodies stacked along a first direction, where the first direction is... Figure 3 In the vertical direction, the three sub-airbags are designated from bottom to top as the first sub-airbag 101, the second sub-airbag 102, and the third sub-airbag 103. The right side of the first sub-airbag 101, located at the bottom, is connected to an air inlet 3, which is used to connect to an air source for inflating and deflating the pneumatic bag. The gas channel connecting the first sub-airbag 101 and the second sub-airbag 102 is designated as the first gas channel 201, and the gas channel connecting the second sub-airbag 102 and the third sub-airbag 103 is designated as the second gas channel 202. In this embodiment, there is one first gas channel 201 and one second gas channel 202, meaning they are the same number. The first side refers to the sub-airbag body. The lower side, the second side refers to the upper side of the sub-airbag body; in this embodiment, the sub-airbag body with gas channels connected to both the upper and lower sides is the second sub-airbag body 102; the standard surface is any plane perpendicular to the first direction, for example, it can be the bottom surface of the flattened first sub-airbag body 101; the projection of the first gas channel 201 on the standard surface is the first orthographic projection 204, and the projection of the second gas channel 202 on the standard surface is the second orthographic projection 205. In this embodiment, the ventilation area of ​​the second gas channel 202 is smaller than the ventilation area of ​​the first gas channel 201, that is, the area of ​​the second orthographic projection 205 is smaller than the area of ​​the first orthographic projection 204; the relationship between the first orthographic projection 204 and the second orthographic projection 205 is shown in the figure below. Figure 4 As shown, the projection circle of the second orthographic projection 205 is inscribed in the projection circle of the first orthographic projection 204. The overlap area of ​​the first orthographic projection 204 and the second orthographic projection 205 is greater than zero. In this embodiment, they completely overlap, that is, the overlap area is equal to the area of ​​the second orthographic projection 205. Figure 4 The shaded area represents the area within the first orthographic projection 204 where the projection of the elastic surface layer of the second gas channel 202 on the standard plane near the third sub-gas bag 103 falls.

[0053] Further, please refer to Figure 5 The elastic surface around the gas channel is provided with an uneven structure; by providing the uneven structure, the upper and lower elastic surfaces of the sub-gas bag body are not completely tightly attached, that is, the upper and lower elastic surfaces are not completely in contact. When the airflow rushes towards the gas bag body, it is easier to push the two contacting elastic surfaces apart.

[0054] During inflation, gas first enters the first sub-air bag 101 through the air inlet 3 to inflate it, opening the first sub-air bag 101. Gas gradually fills the first sub-air bag 101 and flows through the first gas channel 201 towards the upper elastic surface of the second sub-air bag 102 (here, because the ventilation area of ​​the second gas channel 202 is smaller than that of the first gas channel 201, part of the upper elastic surface of the second sub-air bag 102 is aligned with the first gas channel 201). Under the impact of the airflow, the second sub-air bag 102 is opened and injected with air, gradually filling it. Since only a portion of the air pressure in the first gas channel 201 acts on the upper elastic surface of the second sub-air bag 102, the other portion of the airflow impacts the upper elastic surface of the third sub-air bag 103 through the second gas channel 202, opening the third sub-air bag 103 and gradually filling it. This allows the first sub-airbag 101, the second sub-airbag 102, and the third sub-airbag 103 to open and fill sequentially, avoiding the sudden expansion of the intermediate sub-airbag (the second sub-airbag 102) when it is opened under compression, preventing the air burst noise generated by the rapid inflation of the airbag, and reducing noise and abnormal sounds.

[0055] Example 2

[0056] This embodiment provides a pneumatic bladder, which is the same as that in Embodiment 1 and will not be repeated here. The difference is that the first orthographic projection 204 and the second orthographic projection 205 partially overlap.

[0057] For details, please refer to Figure 6 The area of ​​the first orthographic projection 204 is larger than the area of ​​the second orthographic projection 205. In this embodiment, the two partially overlap, meaning that the overlapping area is smaller than both the area of ​​the first orthographic projection 204 and the area of ​​the second orthographic projection 205. Figure 6 The shaded area represents the area within the first orthographic projection 204 where the projection of the elastic surface layer of the second gas channel 202 on the standard plane near the third sub-gas bag 103 falls.

[0058] During inflation, gas first enters the first sub-air bag 101 through the air inlet 3 to inflate it, opening the first sub-air bag 101. Gas gradually fills the first sub-air bag 101 and flows through the first gas channel 201 towards the upper elastic surface of the second sub-air bag 102 (here, because the ventilation area of ​​the second gas channel 202 is smaller than that of the first gas channel 201, part of the upper elastic surface of the second sub-air bag 102 is aligned with the first gas channel 201). Under the impact of the airflow, the second sub-air bag 102 is opened and injected with air, gradually filling it. Since only a portion of the air pressure in the first gas channel 201 acts on the upper elastic surface of the second sub-air bag 102, the other portion of the airflow impacts the upper elastic surface of the third sub-air bag 103 through the second gas channel 202, opening the third sub-air bag 103 and gradually filling it. This allows the first sub-airbag 101, the second sub-airbag 102, and the third sub-airbag 103 to open and fill sequentially, avoiding the sudden expansion of the intermediate sub-airbag (the second sub-airbag 102) when it is opened under compression, preventing the air burst noise generated by the rapid inflation of the airbag, and reducing noise and abnormal sounds.

[0059] Example 3

[0060] This embodiment provides a pneumatic bladder, which is the same as that in Embodiment 1 and will not be repeated here. The difference is that the area of ​​the first orthographic projection 204 is equal to the area of ​​the second orthographic projection 205; the first orthographic projection 204 and the second orthographic projection 205 partially overlap.

[0061] For details, please refer to Figure 7 The area of ​​the first orthographic projection 204 is equal to the area of ​​the second orthographic projection 205. In this embodiment, the two partially overlap, meaning that the overlapping area is smaller than both the area of ​​the first orthographic projection 204 and the area of ​​the second orthographic projection 205. Figure 7 The shaded area represents the area within the first orthographic projection 204 where the projection of the elastic surface layer of the second gas channel 202 on the standard plane near the third sub-gas bag 103 falls.

[0062] During inflation, gas first enters the first sub-air bag 101 through the air inlet 3 to inflate it, opening the first sub-air bag 101. Gas gradually fills the first sub-air bag 101 and flows through the first gas channel 201 towards the upper elastic surface of the second sub-air bag 102 (here, because the ventilation area of ​​the second gas channel 202 is smaller than that of the first gas channel 201, part of the upper elastic surface of the second sub-air bag 102 is aligned with the first gas channel 201). Under the impact of the airflow, the second sub-air bag 102 is opened and injected with air, gradually filling it. Since only a portion of the air pressure in the first gas channel 201 acts on the upper elastic surface of the second sub-air bag 102, the other portion of the airflow impacts the upper elastic surface of the third sub-air bag 103 through the second gas channel 202, opening the third sub-air bag 103 and gradually filling it. This allows the first sub-airbag 101, the second sub-airbag 102, and the third sub-airbag 103 to open and fill sequentially, avoiding the sudden expansion of the intermediate sub-airbag (the second sub-airbag 102) when it is opened under compression, preventing the air burst noise generated by the rapid inflation of the airbag, and reducing noise and abnormal sounds.

[0063] Example 4

[0064] Please refer to Figure 8 This embodiment provides a pneumatic bladder, the similarities with Embodiment 1 will not be repeated, the difference being that: the projection circle of the second orthographic projection 205 and the projection circle of the first orthographic projection 204 are concentric, as shown below. Figure 9 As shown.

[0065] Specifically, in this embodiment, the area of ​​the first orthographic projection 204 is greater than the area of ​​the second orthographic projection 205, that is, the ventilation area of ​​the first gas channel 201 is greater than the ventilation area of ​​the second gas channel 202.

[0066] Preferably, the ventilation area of ​​the second gas channel 202 is equal to 50% of the ventilation area of ​​the first gas channel 201, or the ventilation area of ​​the second gas channel 202 is less than 50% of the ventilation area of ​​the first gas channel 201.

[0067] Furthermore, the gas channel includes at least one sub-channel; the number of sub-channels included in the gas channels connected to both sides of the same sub-gas bag body is the same. In this embodiment, the first gas channel 201 and the second gas channel 202 each include one sub-channel.

[0068] Figure 10This is a schematic diagram of the inflation process of the pneumatic bag in this embodiment. During inflation, gas first enters the first sub-airbag 101 through the air inlet 3 to inflate it, opening the first sub-airbag 101. The gas gradually fills the first sub-airbag 101 and flows through the first gas channel 201 towards the upper elastic surface of the second sub-airbag 102 (here, since the ventilation area of ​​the second gas channel 202 is smaller than that of the first gas channel 201, a portion of the upper elastic surface of the second sub-airbag 102 is aligned with the first gas channel 201). Under the impact of the airflow, the second sub-airbag 102 is opened and injected with air, gradually filling it. Since only a portion of the air pressure in the first gas channel 201 acts on the upper elastic surface of the second sub-airbag 102, the other portion of the airflow impacts the upper elastic surface of the third sub-airbag 103 through the second gas channel 202, opening the third sub-airbag 103 and gradually filling it. This allows the first sub-airbag 101, the second sub-airbag 102, and the third sub-airbag 103 to open and fill sequentially, avoiding the sudden expansion of the intermediate sub-airbag (the second sub-airbag 102) when it is opened under compression, preventing the air burst noise generated by the rapid inflation of the airbag, and reducing noise and abnormal sounds.

[0069] Example 5

[0070] Please refer to Figure 11 This embodiment provides a pneumatic bladder, which is the same as that in embodiment 4 and will not be repeated here. The difference is that the area of ​​the first orthographic projection 204 is smaller than the area of ​​the second orthographic projection 205, that is, the ventilation area of ​​the first gas channel 201 is smaller than the ventilation area of ​​the second gas channel 202.

[0071] Preferably, the ventilation area of ​​the first gas channel 201 is equal to 50% of the ventilation area of ​​the second gas channel 202, or the ventilation area of ​​the first gas channel 201 is less than 50% of the ventilation area of ​​the second gas channel 202.

[0072] Figure 12This is a schematic diagram of the inflation process of the pneumatic bladder in this embodiment. During inflation, gas first enters the first sub-airbag 101 through the air inlet 3 to inflate it. The first sub-airbag 101 is opened, and gas gradually fills the first sub-airbag 101, and then flows through the first gas channel 201 to the upper elastic surface layer of the third sub-airbag 103. (Here, because the ventilation area of ​​the second gas channel 202 is larger than the ventilation area of ​​the first gas channel 201, the upper elastic surface of the third sub-airbag 103 is...) (The first sub-airbag 101 is aligned with the first gas channel 201). Under the impact of the airflow, the third sub-airbag 103 is opened and injected with air, gradually filling it. When the third sub-airbag 103 is relatively full, the airflow bounces downward after impacting the upper elastic surface of the third sub-airbag 103. A portion of the airflow passes through the second gas channel 202 and acts on the portion of the lower elastic surface of the second sub-airbag 102 that extends beyond the upper elastic surface, opening the second sub-airbag 102 and gradually filling it. Thus, the first sub-airbag 101, the third sub-airbag 103, and the second sub-airbag 102 are opened and filled sequentially, avoiding the sudden expansion of the intermediate sub-airbag (second sub-airbag 102) when it is opened under compression, avoiding the air burst noise generated by the rapid inflation of the airbag, and reducing abnormal noise.

[0073] Example 6

[0074] Please refer to Figure 13 This embodiment provides a pneumatic bag, which is an improvement on embodiment 4. The similarities between the two embodiments will not be repeated. The difference is that it includes at least four sub-bags arranged in a stacked manner along the first direction.

[0075] In this embodiment, the pneumatic bladder includes four sub-airbags distributed along a first direction, which are sequentially referred to from bottom to top as the first sub-airbag 101, the second sub-airbag 102, the third sub-airbag 103, and the fourth sub-airbag 104; the gas channel connecting the first sub-airbag 101 and the second sub-airbag 102 is referred to as the first gas channel 201, the gas channel connecting the second sub-airbag 102 and the third sub-airbag 103 is referred to as the second gas channel 202, and the gas channel connecting the third sub-airbag 103 and the fourth sub-airbag 104 is referred to as the third gas channel 203; in this embodiment, the first gas channel 201 includes The first gas channel 201 contains one sub-channel, the second gas channel 202 contains one sub-channel, and the third gas channel 203 contains one sub-channel, meaning that all three contain the same number of sub-channels, and the orthographic projections of the three sub-channels on the standard plane overlap; the ventilation area of ​​the third gas channel 203 is equal to 50% of the ventilation area of ​​the second gas channel 202, or the ventilation area of ​​the third gas channel 203 is less than 50% of the ventilation area of ​​the second gas channel 202; the ventilation area of ​​the second gas channel 202 is equal to 50% of the ventilation area of ​​the first gas channel 201, or the ventilation area of ​​the second gas channel 202 is less than 50% of the ventilation area of ​​the first gas channel 201.

[0076] Figure 14This is a schematic diagram of the inflation process of the pneumatic bladder in this embodiment. During inflation, gas first enters the first sub-airbag 101 through the air inlet 3 to inflate it. The first sub-airbag 101 is opened, and gas gradually fills the first sub-airbag 101. The gas then flows through the first gas channel 201 towards the upper elastic surface layer of the second sub-airbag 102 (here, because the ventilation area of ​​the second gas channel 202 is smaller than that of the first gas channel 201, a portion of the upper elastic surface layer of the second sub-airbag 102 is aligned with the first gas channel 201). Under the impact of the airflow, the second sub-airbag 102 is opened and injected with air. The air gradually fills the third sub-airbag 103. Since only a portion of the air pressure in the first gas channel 201 acts on the upper elastic surface of the second sub-airbag 102, the other portion of the airflow passes through the second gas channel 202 and impacts the upper elastic surface of the third sub-airbag 103, opening the third sub-airbag 103 and gradually filling it. Since only a portion of the air pressure in the second gas channel 202 acts on the upper elastic surface of the third sub-airbag 103, the other portion of the airflow passes through the third gas channel 203 and impacts the upper elastic surface of the fourth sub-airbag 104, opening the fourth sub-airbag 104 and gradually filling it. This allows the first sub-airbag 101, the second sub-airbag 102, the third sub-airbag 103, and the fourth sub-airbag 104 to open and fill sequentially, avoiding the sudden expansion of the intermediate sub-airbags (the second sub-airbag 102 and the third sub-airbag 103) when they open under compression, thus preventing the air burst noise generated by the rapid inflation of the airbags and reducing abnormal noise.

[0077] This embodiment changes the previous air passage structure with the same aperture inside the seat top pressure pneumatic bladder with multiple sub-airbags. By designing an air passage structure with progressively reduced ventilation area between each sub-airbag, the sub-airbags are inflated sequentially during inflation, avoiding the instantaneous bursting of the middle airbag.

[0078] Example 7

[0079] Please refer to Figure 15 This embodiment provides a pneumatic bag, which is an improvement on embodiment 6. The similarities between the two embodiments will not be repeated. The difference is that the number of sub-channels contained in the gas channels connected to both sides of the same sub-bag body is different, and the ventilation area of ​​each sub-channel is not exactly the same.

[0080] In this embodiment, the first gas channel 201 contains one sub-channel, the second gas channel 202 contains three sub-channels, and the third gas channel 203 contains one sub-channel; that is, the number of sub-channels contained in the three channels are not exactly the same. For ease of description, the sub-channel contained in the first gas channel 201 is referred to as the first sub-channel, the sub-channel contained in the second gas channel 202 is referred to as the second sub-channel, and the sub-channel contained in the third gas channel 203 is referred to as the third sub-channel. That is, there is one first sub-channel, three second sub-channels, and one third sub-channel. The ventilation area of ​​the first sub-channel is larger than that of the second sub-channel, the ventilation area of ​​the second sub-channel is equal to that of the third sub-channel, and the orthographic projections of the second and third sub-channels onto the standard plane overlap with the orthographic projection of the first sub-channel onto the standard plane.

[0081] The inflation process of the pneumatic bladder in this embodiment is similar to that in embodiment 6, so it will not be described again here.

[0082] Example 8

[0083] Please refer to Figure 16 This embodiment provides a pneumatic bag, which is an improvement on embodiment 7. The similarities between the two embodiments will not be repeated. The difference is that the number of sub-channels included in the gas channels connected to both sides of the same sub-bag body is different, and the ventilation area of ​​each sub-channel is the same.

[0084] Furthermore, along the first direction and away from the air inlet, the number of sub-channels included in each gas channel decreases sequentially, preferably in an arithmetic sequence.

[0085] In this embodiment, the first gas channel 201 contains six sub-channels, the second gas channel 202 contains four sub-channels, and the third gas channel 203 contains two sub-channels, meaning the number of sub-channels in each channel is completely different. For ease of description, the sub-channels in the first gas channel 201 are referred to as the first sub-channels, the sub-channels in the second gas channel 202 are referred to as the second sub-channels, and the sub-channels in the third gas channel 203 are referred to as the third sub-channels, resulting in a total of six first sub-channels, four second sub-channels, and two third sub-channels. The ventilation areas of the first, second, and third sub-channels are equal, and the orthographic projections of the second and third sub-channels onto the standard plane overlap with the orthographic projection of the first sub-channel onto the standard plane.

[0086] The inflation process of the pneumatic bladder in this embodiment is similar to that in embodiment 7, so it will not be described again here.

[0087] Example 9

[0088] Please refer to Figure 17 This embodiment provides a car seat 4, which includes at least one pneumatic bladder 1 as described in any of Embodiments 1-8. The pneumatic bladder 1 has a one-dimensional opening / expansion / retraction stroke. The car seat 4 also includes a seat frame, seat foam 6, seat cover 12, air tube assembly 11, air source 8, and control valve 7. The pneumatic bladder 1 is disposed between the seat cover 12 and the seat foam 6, or between the seat foam 6 and the seat frame. The air port 3 of the pneumatic bladder 1 is connected to the air source 8 and the control valve 7 through the air tube assembly 11.

[0089] In this embodiment, the pneumatic bladder 1 is disposed between the seat cover 12 and the seat foam 6. The air inlet of the pneumatic bladder 1 is connected to the air source 8 and the control valve 7 through the air pipe assembly 11. The control valve 7 is also connected to the control switch 10 through the wiring harness 9. The pneumatic bladder 1 can achieve a large stroke pressing action in the vertical direction relative to the seat surface of the seat 4.

[0090] In use, control valve 7 controls air source 8 to inflate pneumatic bladder 1. Once the sub-airbags of pneumatic bladder 1 are fully inflated, they will press against the occupant's body in the seat, thus initiating the pressure massage effect. Subsequently, control valve 7 controls air source 8 to deflate pneumatic bladder 1. After the sub-airbags of pneumatic bladder 1 are deflated, they return to a flattened state, waiting for the next inflation and deflation cycle. Several pneumatic bladders 1 are rotated and expanded under the action of control valve 7 and control switch 10, realizing pneumatic massage of the occupant's body in the vehicle seat. Figure 19 This is a diagram showing the airbag inside a car seat back in an uninflated state. Figure 20 This is a diagram showing the inflatable airbag inside a car seat back.

[0091] Preferred, such as Figure 18 As shown, a vibrator 5 can also be installed inside the seat to work in conjunction with the pneumatic bladder 1 to massage the occupant's body.

[0092] It should be noted that the car seat 4 includes a seat cushion 401 and a backrest 402, and the pneumatic bladder 1 can be disposed in the seat cushion 401 or in the backrest 402.

[0093] In addition to being used in seat massage functions, the pneumatic bladder 1 can also be used in airbag structures for seat lumbar support, side wing support, leg support, and head support.

[0094] This invention changes the previous air passage structure of the seat top pressure pneumatic bladder with multiple sub-airbags, which had the same aperture and alignment. It effectively avoids the sudden expansion of the middle airbag when it is compressed, avoids the air burst noise caused by the rapid inflation of the airbag, reduces noise and abnormal sounds, and helps to provide a better massage comfort experience for vehicle occupants.

[0095] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A pneumatic bladder, characterized in that, The device includes at least three sub-airbags stacked along a first direction; one of the sub-airbags at one end has at least one air vent for exchanging gas with the outside; a gas channel connects two adjacent sub-airbags; each sub-airbag has a first side and a second side distributed along the first direction; the gas channel connected to the first side of the same sub-airbag forms a first orthographic projection on a standard plane, and the gas channel connected to the second side forms a second orthographic projection on the standard plane; the overlap area of ​​the first orthographic projection and the second orthographic projection is greater than zero and less than the area of ​​the first orthographic projection and / or the area of ​​the second orthographic projection; the first direction is perpendicular to the standard plane; the ventilation area of ​​the gas channel connected to one side of the same sub-airbag is less than or equal to half the ventilation area of ​​the gas channel connected to the other side.

2. The pneumatic bladder according to claim 1, characterized in that, The sub-airbag body includes two elastic surface layers; ventilation holes are opened at corresponding positions on the elastic surface layers of two adjacent sub-airbag bodies that are close to each other; the elastic surface layers around the two ventilation holes at corresponding positions are fused together to form the gas channel.

3. The pneumatic bladder according to claim 2, characterized in that, The elastic surface layer surrounding the gas channel has an uneven structure.

4. The pneumatic bladder according to claim 1, characterized in that, The gas channel includes at least one sub-channel.

5. The pneumatic bladder according to claim 4, characterized in that, The number of sub-channels contained in the gas channels that connect to both sides of the same sub-gas bag body is the same.

6. The pneumatic bladder according to claim 4, characterized in that, The number of sub-channels contained in the gas channels connected to both sides of the same sub-gas bag body is different, and the ventilation area of ​​each sub-channel is the same.

7. The pneumatic bladder according to claim 4, characterized in that, The number of sub-channels contained in the gas channels connected to both sides of the same sub-gas bag body is different, and the ventilation area of ​​each sub-channel is not exactly the same.

8. The pneumatic bladder according to claim 6, characterized in that, It includes at least four sub-airbags stacked along the first direction; along the first direction and away from the air inlet, the number of sub-channels included in each gas channel decreases sequentially in an arithmetic sequence.

9. A car seat, characterized in that, The device includes at least one pneumatic bladder as described in any one of claims 1-8, and further includes a seat frame, seat foam, seat cover, air tube assembly, air source, and control valve; the pneumatic bladder is disposed between the seat cover and the seat foam, or between the seat foam and the seat frame; the air inlet of the pneumatic bladder is connected to the air source and the control valve through the air tube assembly.

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