Airbag cushion

Abstract

An airbag cushion is provided. The airbag cushion includes: a plurality of airbags including a first airbag and a plurality of second airbags; the at least one first air passage is arranged between the first air bag and at least one second air bag in the plurality of second air bags and is communicated with the first air bag and at least one second air bag in the plurality of second air bags; each second air channel is arranged between every two adjacent second air bags and is communicated with every two adjacent second air bags, and the cross sectional area of each second air channel is larger than that of each first air channel. According to the air bag cushion, the good inflation effect can be achieved without using an existing one-way air inlet piece, the production cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to an airbag cushion. Background Art

[0002] In order to avoid the problem of low inflation efficiency caused by internal airflow backflow during inflation, previous airbag cushions would be equipped with a one-way air inlet. This one-way air inlet is a thin film structure composed of two sheets bonded together, which is used to connect or block the airflow between the two airbags. In the natural state, the two sheets are attached together, blocking the airflow between the two airbags, but during inflation, the air pressure difference between the two airbags expands to form an air inlet channel. However, this one-way air inlet needs to be pre-manufactured before the airbag cushion is formed, which is costly and has a long production process. In addition, it is very thin and soft, and is prone to curling, deformation, opening and closing fatigue, etc. in the later process and subsequent use, resulting in the inability to smoothly inflate and deflate. Utility Model Content

[0003] According to one aspect of the present invention, an airbag cushion is provided. The airbag cushion comprises: a plurality of airbags, including a first airbag and a plurality of second airbags; at least one first air channel disposed between the first airbag and at least one of the second airbags, and connecting the first airbag with the at least one of the second airbags; and a plurality of second air channels disposed between and connecting two adjacent second airbags, wherein the cross-sectional area of ​​each second air channel is greater than the cross-sectional area of ​​the first air channel.

[0004] The present invention is completed based on the above problem. According to one aspect of the present invention, a good inflation effect can be achieved without using a conventional one-way air inlet member, thereby reducing production costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 It is a schematic top view of the airbag cushion of the present application.

[0006] Figure 2 It is a side cross-sectional schematic diagram of the airbag cushion of the present application.

[0007] Figure 3 It is a three-dimensional schematic diagram of the air valve of the airbag cushion of the present application.

[0008] Figure 4 It is a three-dimensional schematic diagram of the air valve of the airbag cushion of the present application.

[0009] Figure 5 It is an exploded perspective schematic diagram of the air valve of the airbag cushion of the present application.

[0010] Figure 6It is an exploded perspective schematic diagram of the air valve of the airbag cushion of the present application.

[0011] Figure 7 It is a schematic diagram of the gas valve closed state.

[0012] Figure 8 This is a schematic diagram of the valve knob being pressed.

[0013] Figure 9 This is a schematic diagram of the gas valve open state.

[0014] Figure 10 It is a schematic diagram showing the state where the valve cover is closed and the valve is closed.

[0015] Description of Reference Numerals

[0016] 1000: airbag cushion, 100: cushion body, 101: first cushion body, 102: second cushion body, 110: airbag, 111: first airbag, 112: second airbag, 120: airway, 121: first airway, 122: second airway, 200: elastomer, 300: air valve, 310: valve body, 310a: valve port, 310c: insertion hole, 310b: vent, 311: first end portion, 312: second end portion, 320: cover, 330: valve core, 331: knob, 332: diameter reduction portion, 332t: protrusion, 333: anti-leakage air sheet, 340: elastic member. DETAILED DESCRIPTION

[0017] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other unless there is a conflict.

[0018] Figure 1 、 Figure 2 This is a diagram of an airbag cushion 1000 according to the present invention. Figure 1 is a top view of the airbag cushion of the present application, Figure 2 FIG1 is a side cross-sectional view of the airbag cushion of the present application. The airbag cushion 1000 includes a cushion body 100 and an airbag auxiliary component provided on the cushion body 100.

[0019] The cushion body 100 is composed of a first cushion body 101 and a second cushion body 102, which are overlapped and combined in an upper and lower manner. The cushion body 100 includes multiple air channels 120 and multiple air bags 110 connected by the multiple air channels 120. The multiple air channels 120 and the multiple air bags 110 are arranged in a bulging manner. When inflated, the multiple air bags 110 provide support and cushioning for the user. The first cushion body 101 is bulged to form a bulged portion of the multiple air channels 120 and the multiple air bags 110 arranged in a prescribed manner. The second cushion body 102 is bonded to the portion of the first cushion body 101 other than the bulged portion of the multiple air channels 120 and the multiple air bags 110, so that the multiple air channels 120 and the multiple air bags 110 are interconnected, and the interior of the cushion body 100 is airtight and isolated from the outside.

[0020] The plurality of airbags 110 include a first airbag 111 and a plurality of second airbags 112. The shapes and sizes of the first airbag 111 and the second airbag 112 may be the same or different. In some embodiments, the height of the first airbag 11 is not less than that of the second airbag 112.

[0021] When inflated, the first airbag 111 serves as the starting point for gas flow within all airbags 110, with the plurality of second airbags 112 located downstream of the first airbag 111. Furthermore, when deflated, the first airbag 111 serves as the endpoint for gas flow within all airbags 110, with the plurality of second airbags 112 located upstream of the first airbag 111. The plurality of air channels 120 includes at least one first air channel 121 and a plurality of second air channels 122. The cross-sectional area of ​​the first air channel 121 is smaller than the cross-sectional area of ​​the second air channels 122. For example, the height of the first air channel 121 may be smaller than that of the second air channels 122, and / or the width of the first air channel 121 may be smaller than that of the second air channels 122. Furthermore, the length of the first air channel 121 may be greater than or equal to the length of the second air channel 122. At least one first air channel 121 is connected between the first airbag 111 and the at least one second airbag 112 , so that the first airbag 111 and the at least one second airbag 112 are in communication. The plurality of air channels 122 are connected to the plurality of second airbags 112 .

[0022] In this embodiment, the airbags 110 , the first air channel 121 , and the second air channel 122 all bulge toward a side away from the second cushion body 102 . The bulging heights of the first air channel 121 and the second air channel 122 are smaller than the bulging heights of the airbags 110 .

[0023] In addition, the inventors compared the comparative example airbag cushion connected between the first airbag 111 and the second airbag 112 with a second air duct 122 with a smaller cross-sectional area with the embodiment using the airbag cushion 1000 of the present application, and found that: in the inflation test of the airbag cushion 1000 of the embodiment, the air pressure value was 19 kPa at about 1.5 minutes, and continued pressing no longer effectively inflated. After the pressing was completed, the air pressure value was measured to be 17.9 kPa, and the maximum air pressure was 17~20 kPa; in the inflation test of the comparative example airbag cushion, the air pressure value was 6.1 kPa at about 1.5 minutes, and continued pressing no longer effectively inflated. After the pressing was completed, the air pressure value was measured to be 4.6 kPa, and the maximum air pressure was 4~7 kPa.

[0024] By connecting the first air duct 121 with a smaller cross-sectional area between the first airbag 111 and the second airbag 112, the maximum air pressure within the airbag cushion 1000 of the present application is higher (assuming no increase in maximum air pressure) when inflated for the same time and full (compared to a comparative example in which the second air duct 122 is connected between the first airbag 111 and the second airbag 112). According to the pressure formula, gas pressure is proportional to density, and the gas density within the airbag cushion 1000 of the present application is higher. Furthermore, since the gas volume within the airbag cushion 1000 of the present application is approximately the same as that within the comparative example, the total amount of gas within the airbag cushion 1000 of the present application is greater. In other words, by connecting the first air duct 121 between the first airbag 111 and the second airbag 112, the inflation of the airbag cushion 1000 is more efficient. After analysis, according to the pressure formula, it can be seen that pressure is inversely proportional to area. Under the condition of the same pressure, in the airbag cushion 1000 of the present application using the first air channel 121 with a smaller area (cross-sectional area), the pressure of the backflow from the second airbag 112 to the first airbag 111 is greater, so the backflow speed is slow, the amount of gas retained in the multiple second airbags 112 is larger, and the inflation is faster and more efficient.

[0025] According to the airbag cushion 1000 of the present application, the airbag cushion 1000 can be inflated without a one-way air inlet member, thereby achieving a good inflation effect, reducing production costs, and improving production efficiency.

[0026] The airbag auxiliary component is located within the first airbag 111 and is used to control the air intake and exhaust of the multiple airbags 110. It includes an elastomer 200 and an air valve 300. The elastomer 200 is built into the first airbag 111 and sandwiched between the first cushion 101 and the second cushion 102. The elastomer 200 can be made of any elastic material, such as sponge, plastic, spring, rubber, or silicone. The air valve 300 is located on the second cushion 102 of the first airbag 111, connecting the interior and exterior of the airbag cushion 1000.

[0027] As follows, refer to Figures 3 to 10 , explaining the specific structure of the gas valve 300. Figure 3 It is a three-dimensional schematic diagram of the air valve of the airbag cushion of the present application. Figure 4 It is a three-dimensional schematic diagram of the air valve of the airbag cushion of the present application. Figure 5 It is an exploded perspective schematic diagram of the air valve of the airbag cushion of the present application. Figure 6 It is an exploded perspective schematic diagram of the air valve of the airbag cushion of the present application. Figure 7 It is a schematic diagram of the gas valve closed state. Figure 8 This is a schematic diagram of the valve knob being pressed. Figure 9 This is a schematic diagram of the gas valve open state. Figure 10 It is a schematic diagram showing the state where the valve cover is closed and the valve is closed.

[0028] The air valve 300 used in this embodiment includes a valve body 310, a valve core 330, an elastic member 340 and a cover 320. The structure of the air valve 300 can not only realize one-way air intake, but also allow air release.

[0029] The valve body 310 is generally cylindrical in shape, having a first end 311 and a second end 312 spaced apart from each other. It also includes a valve port 310a for communication with the outside. The second end 312 has a non-circular insertion hole 310c formed through its center. The insertion hole 310c is formed around its periphery, with one or more vents 310b formed throughout. These vents 310b allow air to flow between the interior of the airbag cushion 1000 and the outside. The air valve 300 is mounted on the second cushion body 102, with the second end 312 positioned within the first airbag 111 and the first end 311 exposed to the outside of the airbag cushion 1000. A valve core 330 is mounted on the second end 312. By operating the valve core 330, the interior of the first airbag 110 can be connected to or blocked from the outside. A cap 320 is attached to the outer circumference of the valve body 310, sealing the valve port 310a and thereby sealing the air within the airbag cushion 1000.

[0030] The valve core 330 is arranged in the valve body 310, and includes a knob 331, a diameter reduction portion 332 and an air leakage prevention sheet 333. The air leakage prevention sheet 333 is arranged on the inner side of the second end portion 312 facing the first air bag 110, and is used to cover all the vents 310b. Generally, the valve core 330 is flexible, and the other parts of the valve core 330 can be flexible or rigid. The diameter reduction portion 332 is in the shape of an elongated strip, one end of which is connected to the knob 331, and the other end extends toward the second end portion 312, passes through the insertion hole 310c and is connected to the air leakage prevention sheet 333. By operating the knob 331, the entire valve core 330 can be rotated. The diameter reduction portion 332 is smaller than the knob 331, and has a protrusion 332t extending toward the outside of the circumference on the side close to the air leakage prevention sheet 333. Even the size of the portion of the diameter reduction portion 332 including the protrusion 332t is smaller than the air leakage prevention sheet 333. The reduced diameter portion 332 includes a protrusion 332t, so that it is formed into a non-circular shape that matches the shape of the insertion hole 310c. Therefore, when the reduced diameter portion 332 is aligned with the insertion hole 310c, the protrusion 332t enters the insertion hole 310c, and the anti-leakage sheet 333 covers the vent 310b. If rotated by a certain angle, the reduced diameter portion 332 and the insertion hole 310c are misaligned, and the protrusion 332t cannot enter the insertion hole 310c, but extends out of the first airbag 110 and abuts against the second end 312, and the anti-leakage sheet 333 is separated from the vent 310b by a certain distance.

[0031] The elastic member 340 is mounted on the tapered portion 332 of the valve core 330. One end of the elastic member 340 abuts the surface of the knob 331 facing the air leakage prevention sheet 333, and the other end abuts the surface of the second end portion 312 facing the valve port 310a. In this embodiment, the elastic member 340 is a spring. In other embodiments, the elastic member 340 may also be other components, which are not limited here.

[0032] When inflation is required, the cover 320 of the air valve 300 is opened, exposing the valve port 310a. The elastic body 200 supports the first airbag 111 to bulge in a natural state. The interior of the first airbag 111 is filled with gas. There is no pressure difference between the inside and outside of the first airbag 111. The protrusion 332t of the diameter reduction portion 332 is located in the insertion hole 310c. The air leakage prevention sheet 333 covers the vent 310b. Then, when the first airbag 111 is pressed, the air pressure inside the first airbag 111 is greater than the air pressure outside and the second airbag 112. Since the air in the place with high air pressure will flow to the place with low air pressure, the air leakage prevention sheet 333 is tightly attached to the second end portion 312 under the pressure difference and seals all the vents 310b. The first airbag 111 The gas inside the airbag 111 enters the second airbag 112 through the first air passage 121, then releases the first airbag 111. Under the elastic restoring action of the elastic body 200, the elastic body 200 supports the first airbag 111 in its original position. At this point, the air pressure inside the first airbag 111 is lower than that outside. Due to the pressure difference, the gas flows from the outside into the first airbag 111, causing the flexible air leakage prevention sheet 333 to float and deform, preventing it from contacting the second end 312 and sealing all the vents 310b. As a result, the external gas is drawn into the first airbag 111 through the vents 310b. Simultaneously, a small amount of gas that has been inflated into the second airbag 112 flows back toward the first airbag 111 until the first airbag 111 is refilled. In this way, the airbag cushion 1000 can be inflated by repeatedly pressing and releasing the first airbag 111. After the airbag is inflated, closing the cover 320 of the air valve 300 prevents leakage.

[0033] In addition, when it is necessary to deflate, the cover 320 of the air valve 300 is opened to expose the valve port 310a. Then, the knob 331 is pressed toward the inside of the first air bag 111 (i.e., along the F direction), and the elastic member 340 is compressed, so that the valve core 330 moves toward the inside of the first air bag 111, and the protrusion 332t of the diameter-reduced portion 332 moves from the insertion hole 310c to the first air bag 111. Then, the knob 331 is rotated to a specified angle, and the protrusion 332t is misaligned with the insertion hole 310c. The knob 331 is then released, and the protrusion 332t abuts against the surface of the second end portion 312 facing the interior of the first airbag 111. The air leakage prevention sheet 333 is supported by the protrusion 332t and is separated from the second end portion 312 by a certain distance, so that the external gas and the gas in the first airbag 111 can be smoothly connected. Then, the multiple airbags 110 are squeezed, so that the gas in the multiple airbags 110 is discharged to the outside through the vent 310b, thereby achieving the deflation of the airbag cushion 1000.

[0034] In the prior art, because a one-way air inlet member can only intake air in one direction, an outlet valve must be provided separately from the air valve, with the air valve positioned upstream of the one-way air inlet member and the outlet valve positioned downstream of the one-way air inlet member. In contrast, the airbag cushion 1000 of the present application eliminates the need for a one-way air inlet member, allowing for both inflation and deflation using a single air valve 300, further reducing production costs and improving efficiency.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An airbag cushion, characterized in that: include: a plurality of airbags, comprising a first airbag and a plurality of second airbags; at least one first air passage, which is disposed between the first airbag and at least one second airbag among the plurality of second airbags and connects the first airbag and at least one second airbag among the plurality of second airbags; as well as A plurality of second air passages are respectively arranged between two adjacent second air bags and connect the two adjacent second air bags, wherein the cross-sectional area of ​​the second air passage is greater than the cross-sectional area of ​​the first air passage.

2. The airbag cushion according to claim 1, characterized in that: The airbag cushion comprises a first cushion body and a second cushion body bonded together, The first air channel and the second air channel bulge toward a side away from the second pad body.

3. The airbag cushion according to claim 1, characterized in that: The length of the first airway is greater than or equal to the length of the second airway, A width of the first air channel is smaller than a width of the second air channel.

4. The airbag cushion according to claim 1, characterized in that The pressure of the gas flowing to the first gas channel is greater than the pressure of the gas flowing to the second gas channel.

5. The airbag cushion according to claim 2, characterized in that: The multiple airbags, the first air channel, and the second air channel all bulge toward a side away from the second cushion body, and the bulging heights of the first air channel and the second air channel are smaller than the bulging heights of the multiple airbags.

6. The airbag cushion according to claim 1, characterized in that The airbag cushion further includes an elastic body, which is disposed in the first airbag and is used for resetting the first airbag after being pressed.

7. The airbag cushion according to claim 2, characterized in that: The plurality of air bags swell toward a side away from the second cushion body, The height of the first airbag is not lower than that of the second airbag.

8. The airbag cushion according to claim 7, characterized in that: In the first airbag, the second cushion body is formed with an air valve, The air valve has a valve body and a valve core, the valve body has an air vent, the air vent connects the inside and outside of the first airbag, the valve core has an air leakage prevention sheet covering the air vent, and under an air pressure difference, the air leakage prevention sheet can allow external gas to flow into the interior of the first airbag.

9. The airbag cushion according to claim 8, characterized in that: The air valve further comprises an elastic member, which is sleeved in the valve core. One end of the elastic member abuts against the valve core, and the other end is close to the air leakage prevention sheet and abuts against the valve body. The valve core has a non-circular shape matching the vent, When the valve core is aligned with the valve body, the air leakage prevention sheet covers the vent. When the valve core and the valve body are misaligned, the air leakage preventing sheet is spaced apart from the vent.

10. The airbag cushion according to claim 9, characterized in that: The valve core further includes a knob and a diameter reduction portion, wherein the air leakage prevention sheet and the knob are respectively arranged at both ends of the diameter reduction portion, and the diameter reduction portion has a protrusion extending toward the circumferential outside on a side close to the air leakage prevention sheet. The air valve has an insertion hole, and the diameter-reduced part is provided with a protrusion. The insertion hole is for installing the diameter-reduced part. When the valve core and the valve body are aligned, the protrusion enters the insertion hole. When the valve core and the valve body are misaligned, the protrusion abuts against the end of the air valve facing the first airbag.

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