Air bag structure capable of suppressing noise

Abstract

An air bag structure with a noise suppression function comprises a plurality of air bag bodies arranged in a stacked mode and at least one noise suppression surface layer, and each air bag body comprises two elastic thin films connected with each other, two inner surfaces and two outer surfaces. The noise suppression surface layer is arranged on one outer surface of two connected outer surfaces in a plurality of stacked air bag bodies, the noise suppression surface layer is of a non-woven fabric structure, the noise suppression surface layer is integrally fused on the outer surfaces of the air bag bodies in a hot melting mode, the surface layer of the noise suppression surface layer is provided with irregular lines, and the surface layer of the noise suppression surface layer is provided with a noise suppression layer. The noise suppression device is used for suppressing noise generated when the air bag bodies are inflated or deflated.

Description

Technical Field

[0001] The invention relates to an airbag structure, in particular to an airbag structure with noise suppression function. Background Art

[0002] The airbag structure can be used as an adjustable support and is widely used in life. For example, it can be used in the backrest of a seat. By adding an airbag structure inside the backrest, the function of lumbar support or pneumatic massage can be achieved.

[0003] Among them, some seats are equipped with a multi-stage lumbar adjustment structure in the seat back, especially the seats installed in high-end vehicles, which can adjust the support thickness of the lumbar part of the seat back in multiple stages. The existing technology supports the occupant's waist by controlling the inflation or deflation of a number of cushion airbags, which can change the support force for the waist, which not only makes the user comfortable, but also reduces the damage to the lumbar spine caused by sitting for a long time.

[0004] However, the current adjustable lumbar support technology has the following disadvantages when used: 1. Airbags tend to make noise when inflating or deflated: The current technology for adjusting the lumbar support thickness of the seat back in multiple stages mainly utilizes a number of stacked airbags. Generally, three layers of airbags are arranged in the seat back. When one airbag is inflated, it has one lumbar support thickness, when two airbags are inflated, it has another lumbar support thickness, and when three airbags are inflated, it has another lumbar support thickness. The user can adjust the lumbar structure of the seat back for comfort by himself. However, under the compression of gravity, when the airbags are inflated or deflated, the surfaces of the airbags in contact with each other will produce material viscosity, and the two tightly pressed material surfaces are prone to produce sharp noise when sliding against each other. Especially in a quiet car environment, the continuous friction noise is particularly uncomfortable.

[0005] Second, the cost of noise suppression is high: In order to improve the noise generated by the airbags when they are inflated or deflated, some seats have a layer with a smaller friction coefficient between the stacked airbags to block the airbags. However, the layer in the seat is not fixed to the airbags, so the airbags and the layer will slide. Therefore, a dedicated bag must be provided for each airbag in the seat, which makes the seat structure complicated and the cost excessively increased.

[0006] 3. Ductility fixation of airbag: The current airbags are made of rubber and plastic materials, which expand when inflated and flatten when deflated. Therefore, the plastic materials used are elastic rubber and plastic materials. There is no other design on the surface structure of the airbag. Therefore, when the airbag is inflated or deflated, the ductility of the airbag depends on the ductility provided by the material itself and the thickness of the film, and the ductility is fixed.

[0007] Therefore, how to suppress the noise generated by the stacked airbags in the seat when inflating or deflation in the simplest way is a goal that relevant technical personnel urgently need to work hard on. Summary of the invention

[0008] In order to solve the above technical problems, one object of the present invention is to provide an airbag structure with noise suppression.

[0009] The airbag structure with noise suppression includes an airbag body and a noise suppression surface layer; The airbag body comprises two elastic films connected to each other, two inner surfaces provided on each of the elastic films and in contact with each other, and two outer surfaces provided on each of the elastic films and opposite to each of the inner surfaces, and the peripheries of each of the elastic films are welded to each other to form an airbag structure; The noise suppression surface layer is arranged on one of the outer surfaces, and the structure of the noise suppression surface layer is non-woven fabric.

[0010] Another technical means of the present invention is that the above-mentioned airbag structure with noise suppression further includes another noise suppression surface layer, and each of the noise suppression surface layers is separately arranged on each of the outer surfaces.

[0011] Another object of the present invention is to provide an airbag structure with noise suppression.

[0012] The airbag structure with noise suppression function comprises a plurality of stacked airbag bodies and at least one noise suppression surface layer.

[0013] Each airbag body includes two elastic films connected to each other, two inner surfaces provided on each elastic film and in contact with each other, and two outer surfaces provided on each elastic film and opposite to each inner surface. The peripheries of each elastic film are welded to each other to form an airbag structure. Among a plurality of stacked airbag bodies, one outer surface of one airbag body is connected to one outer surface of another airbag body.

[0014] The noise suppression surface layer is arranged on one of the two outer surfaces of the airbag main body which are stacked and connected to each other. The structure of the noise suppression surface layer is non-woven fabric.

[0015] Another technical means of the present invention is that the number of the noise suppression surface layers is several and they are respectively arranged on the several outer surfaces.

[0016] Another technical means of the present invention is that each of the airbag bodies further includes a plurality of shallow lines formed on the inner surface thereof.

[0017] Another technical means of the present invention is that the surface of the noise suppression layer has irregular textures.

[0018] Another technical means of the present invention is that the material of the elastic film is thermoplastic polyurethane (TPU), and the material of the noise suppression surface layer is selected from one of polypropylene (PP), nylon plastic (PA), thermoplastic polyurethane (TPU), polyethylene terephthalate (PET), polyethylene (PE), and a combination thereof.

[0019] Another technical means of the present invention is that the thickness of the elastic film is between 0.1 mm and 1.5 mm, and the thickness of the noise suppression surface layer is between 0.03 mm and 0.5 mm.

[0020] Another technical means of the present invention is that the weight per unit area of ​​the noise suppression surface layer is between 36g / m 2 ~600g / m 2 .

[0021] Another technical means of the present invention is that each of the above-mentioned airbag bodies further includes an air conveying pipe connected to each of the elastic films.

[0022] The beneficial effect of the present invention is that the structure of the noise suppression surface layer is a non-woven fabric structure, the weaving structure of its fibers is irregular and feels rough to the touch, and when two noise suppression surface layers rub against each other, or when one noise suppression surface layer rubs against the surface of another material, the sound generated will be affected by the irregular weaving structure of the non-woven fabric, causing the sound to be interrupted and discontinuous, which not only makes the generated sound smaller, but also the generated sound will be absorbed by the surface structure of the non-woven fabric. Therefore, when one of the two airbags is inflated or deflated, it is not easy to generate annoying sharp friction noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of a preferred embodiment of an airbag structure with noise suppression according to the present invention, illustrating the use of the airbag structure with noise suppression; Figure 2is a front view schematic diagram illustrating a front view of an airbag body provided with a noise suppression surface layer in the preferred embodiment; Figure 3 is a partial cross-sectional schematic diagram illustrating a partial cross-sectional view of the airbag body provided with the noise suppression surface layer in the preferred embodiment; and Figure 4 It is a partial cross-sectional schematic diagram, illustrating a partial cross-sectional view of the airbag structure with noise suppression in the preferred embodiment.

[0024] In the figure: 21 seats 22 Air pressure control module 3 airbags structure to suppress noise 31 Airbag body 311 elastic film 312 inner surface 313 outer surface 314 shallow texture 315 fixed part 316 air delivery pipe fittings 317 airbag welding ring 32 Noise Suppression Surface 411 First Airbag 412 Second Airbag 413Third airbag. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0026] See also Figure 1 , Figure 2 , Figure 3 , which is a preferred embodiment of an airbag structure 3 with noise suppression of the present invention. The airbag structure 3 with noise suppression is arranged in the backrest of a seat 21, and its position is at the waist of the human body. The main purpose is to adjust the thickness of the backrest of the seat 21 to provide different lumbar supports. The airbag structure 3 with noise suppression is connected to an air pressure control module 22, and the air pressure control module 22 is an air pump and a solenoid valve with a control circuit, but is not limited to this. The airbag structure 3 with noise suppression includes a plurality of stacked airbag bodies 31 and at least one noise suppression surface layer 32.

[0027] Each airbag body 31 includes two elastic films 311 connected to each other, two inner surfaces 312 provided on each of the elastic films 311 and in contact with each other, two outer surfaces 313 provided on each of the elastic films 311 and opposite to each of the inner surfaces 312, a plurality of shallow lines 314 formed on each of the inner surfaces 312, at least one fixing portion 315 provided on each of the elastic films 311, and an air conveying pipe 316 connected to each of the elastic films 311.

[0028] The noise suppression surface layer 32 is arranged on one of the outer surfaces 313 of the two outer surfaces 313 of the airbag body 31 which are stacked and connected to each other. Therefore, the noise suppression surface layer 32 is in direct contact with the elastic film 311 of the other airbag body 31. The structure of the noise suppression surface layer 32 is non-woven fabric.

[0029] In actual implementation, the backrest of the seat 21 may also be provided with only one airbag structure 3 for suppressing noise, which includes an airbag body 31 and a noise suppressing surface layer 32. The airbag body 31 includes two elastic films 311 connected to each other, two inner surfaces 312 disposed on each of the elastic films 311 and in contact with each other, and two outer surfaces 313 disposed on each of the elastic films 311 and opposite to each of the inner surfaces 312. The peripheries of each of the elastic films 311 are welded to each other to form an airbag structure. The noise suppressing surface layer 32 is disposed on one of the outer surfaces 312, and the structure of the noise suppressing surface layer 32 is non-woven fabric. In actual implementation, the airbag structure 3 for suppressing noise includes two noise suppressing surface layers, each of which is disposed on each of the outer surfaces, and should not be limited to the example of the preferred embodiment.

[0030] The edges of each elastic film 311 are welded to each other to form an airbag structure. Among the airbag bodies 31 stacked on each other, one outer surface 313 of one airbag body 31 is connected to one outer surface 313 of another airbag body 31 through the noise suppression surface layer 32.

[0031] The noise suppression surface layer 32 is a whole piece that is hot-melted to the outer surface 313 of the airbag body 31. The surface of the noise suppression surface layer 32 has irregular patterns, which is used to suppress the noise generated when the several airbag bodies 31 are inflated or deflated. The air delivery pipe 316 of each airbag body 31 is connected to the air pressure control module 22 to control the inflation and deflation of the several airbag bodies 31 respectively.

[0032] Please refer to Figure 2 , Figure 3 , Figure 4In the preferred embodiment, the number of the plurality of airbag bodies 31 is three, but not limited thereto. The plurality of airbag bodies 31 are respectively a first airbag 411, a second airbag 412, and a third airbag 413, wherein the two outer surfaces 313 of the first airbag 411 and the third airbag 413 are not provided with the noise suppression surface layer 32, and the two outer surfaces 313 of the second airbag 412 are provided with the noise suppression surface layer 32. In actual implementation, the airbag structure 3 with noise suppression can be provided with the noise suppression surface layer 32 for the two outer surfaces 313 of the first airbag 411 and the third airbag 413, and the two outer surfaces 313 of the second airbag 412 are not provided with the noise suppression surface layer 32, or the number of the noise suppression surface layers 32 is several and they are respectively provided on the plurality of outer surfaces 313. For example, the two outer surfaces 313 of the first airbag 411, the second airbag 412, and the third airbag 413 are all provided with the noise suppression surface layer 32, but it should not be limited thereto.

[0033] The air pressure control module 22 inflates the first airbag 411, the second airbag 412, and the third airbag 413 respectively to adjust the thickness of the backrest of the seat 21. For example, the first airbag 411, the second airbag 412, and the third airbag 413 are all in a flat state when not inflated, and the thickness of the backrest of the seat 21 is the thinnest. When the air pressure control module 22 only inflates the first airbag 411, the backrest of the seat 21 can increase the first thickness. When the air pressure control module 22 inflates the first airbag 411 and the second airbag 412, the backrest of the seat 21 can increase the second thickness. When the air pressure control module 22 inflates the first airbag 411, the second airbag 412, and the third airbag 413, the backrest of the seat 21 can increase the third thickness.

[0034] When the plurality of stacked airbag bodies 31 are inflated or deflated respectively, the two outer surfaces 313 of the plurality of airbag bodies 31 will slide, and the noise suppression surface layer 32 will not generate stickiness when in contact with the elastic film 311, and the two noise suppression surface layers 32 will not generate stickiness when in contact with each other. Therefore, the airbag body 31 provided with the noise suppression surface layer 32 will not generate plastic friction noise when inflated or deflated.

[0035] It is worth mentioning that the inventor has tried to use general woven fabric for the noise suppression surface layer 32, but the surface texture of general woven fabric is regular (for example: weaving thread tic-tac-toe weaving, etc.), so when the general woven fabric surfaces slide against each other, the regular textures will produce continuous sound when rubbing against each other, and the continuous sound will increase the noise and fail to effectively improve the noise. On the other hand, the fiber structure of the noise suppression surface layer 32 used in this case belongs to a non-woven fabric structure without weaving rules, and the fiber direction is disordered, so the height of the fiber setting is high and low. When two airbag bodies 31 with noise suppression surface layers rub against each other, or when an airbag body 31 with noise suppression surface layers rubs against other surfaces, the sound generated is discontinuous and interrupted, which effectively improves the noise situation. Especially in a quiet car interior space, the noise generated by the noise suppression airbag structure 3 with noise suppression surface layer 32 when inflating or deflated will be interrupted, the noise will become smaller, and the noise will also be absorbed by the non-woven fabric structure. Even if there is still a slight sound, the sound will appear to be relatively low and not abrupt, and not easy to be annoying.

[0036] Preferably, the elastic film 311 is made of thermoplastic polyurethane (TPU). In actual implementation, the elastic film 311 may be made of other thermoplastic plastic materials, but the present invention is not limited thereto.

[0037] The material of the noise suppression surface layer 32 is selected from fiber materials made of polypropylene (PP), nylon plastic (PA), polyester fiber (Poly), thermoplastic polyurethane (TPU), polyethylene terephthalate (PET), polyethylene (PE), etc., and is used to manufacture the noise suppression surface layer 32 with irregular patterns, but not limited to this. Since the method of making non-woven fabrics is a prior art and is not the focus of this case, it will not be described in detail here.

[0038] Preferably, the thickness of each elastic film 311 is 0.38 mm, and the thickness of each noise suppression surface layer 32 is 0.2 mm to 0.5 mm. In actual implementation, the thickness of the elastic film 311 can be 0.1 mm to 1.5 mm, and the thickness of the noise suppression surface layer 32 can be 0.05 mm to 3 mm, or the thickness of the elastic film 311 can be 0.03 mm to 0.5 mm, and it should not be limited to this. Among them, the specific gravity (density) of the noise suppression surface layer 32 is 1.2. When the thickness of the noise suppression surface layer 32 is set to 0.03 mm to 0.5 mm, the unit area weight of the noise suppression surface layer 32 is 0.03 mm×1 m×1 m=36 g / m 2 ~0.5mm×1m×1m=600g / m 2 In other words, even if the noise suppression surface layer 32 is disposed on the outer surface 313 of the elastic film 311, not only the weight will not increase too much, but also the manufacturing parameters of the subsequent processes do not need to be adjusted.

[0039] The noise suppression surface layer 32 is heat-melted to the outer surface 313 of the airbag body 31 by co-extrusion lamination plastic film manufacturing technology. When the elastic film 311 is in a molten state, the noise suppression surface layer 32 is pressed to the outer surface 313 of the elastic film 311. The co-extrusion lamination pressing mold is provided with a shallow pattern 314, and supports the inner surface 312 of the elastic film 311 so that the inner surface 312 of the elastic film 311 is melted with the shallow pattern 314, which not only allows the noise suppression surface layer 32 to be 2 is more tightly fused to the outer surface 313 of the elastic film 311, and the inner surface 312 with the shallow lines 314 can also make the elastic film 311 more ductile, and when the elastic film 311 elastically extends or shrinks, it will not make noise. Preferably, the pressing mold is a roller, and the surface of the roller is provided with a circle of concave-convex structures, so that the shallow lines 314 are provided with a plurality of parallel concave-convex indentation structures. In actual implementation, the shallow lines 314 can use other indentation structures, and should not be limited to this.

[0040] After the step of fusing the elastic film 311 and the noise suppression surface layer 32 is completed, the inner surfaces 312 of the two elastic films 311 are brought into contact with each other, and the air delivery pipe 316 is set between each of the elastic films 311, and then the outer edges of each elastic film 311 are bonded to form an airbag welding ring 317 by high-frequency technology to make an airbag structure. Since there are many types of welding technologies for polymer materials, this should not be limited to this. According to the actual operation of the inventor, the process conditions of the elastic film 311 with the noise suppression surface layer 32 are the same as the process conditions of the elastic film 311 without the noise suppression surface layer 32. Therefore, the process conditions at the airbag production end at the back of the process do not need to be adjusted, and the process parameters of the processing production line will not be changed. The existing production equipment does not need to adjust the production parameters, which can greatly save the time of mass production of products.

[0041] In the preferred embodiment, the number of the fixing parts 315 is several, and the structure of one of the fixing parts 315 is a recessed portion arranged on the side of the airbag body 31, and the structure of the other fixing parts 315 is a perforated portion arranged on the airbag body 31. The several fixing parts 315 can be provided for the fixing parts (not shown in the drawings) in the seat 21 to fix the position of the noise-suppressing airbag structure 3 in the seat 21, and the several airbag bodies 31 can be stacked together. In actual implementation, the number and structure of the fixing parts 315 should not be limited to the examples of this preferred embodiment.

[0042] From the above description, it can be seen that the airbag structure 3 with noise suppression of the present invention does have the following effects: 1. Improve the noise during inflation and deflation: The plurality of airbag bodies 31 are stacked, and the noise suppression surface layer 32 will not produce a material sticky state regardless of being in contact with another noise suppression surface layer 32 or with other material surfaces. Therefore, when the airbag body 31 provided with the noise suppression surface layer 32 is inflated or deflated, the noise suppression surface layer 32 can slide smoothly with other contact surfaces, effectively improving the noise caused by friction on the material surface, and the structure produced by the plastic fiber of the noise suppression surface layer 32 can also interrupt, absorb, and reduce noise. Therefore, even in a quiet environment inside the vehicle, the airbag structure 3 with noise suppression can effectively suppress the sound during inflation or deflation.

[0043] 2. Maintaining manufacturing production parameters: According to actual tests by the applicant, the process conditions of the airbag with the noise suppression surface layer 32 are the same as those of the airbag without the noise suppression surface layer 32. Therefore, the process conditions of the airbag structure 3 located in the latter stage of the process do not need to be adjusted, and the process parameters of the existing processing production line will not be changed. There is no need to spend extra time and energy to adjust the production parameters between the existing production equipment, which can greatly save the time for mass production of products.

[0044] 3. Reduce process costs: Since the noise suppression surface layer 32 is provided on the plurality of stacked airbag bodies 31, there is no need to arrange additional manpower and material resources to provide an interlayer or bag with a smaller friction coefficient between the plurality of stacked airbag bodies 31, and by means of the fixing portion 315 provided on the airbag body 31, the plurality of airbag bodies 31 can be firmly set in the backrest of the seat 21, thereby effectively reducing the manufacturing cost of the noise-proof seat 21.

[0045] 4. Improve the ductility of the airbag: The noise suppression surface layer 32 disposed on the outer surface 313 of the airbag body 31 is made of a harder material. Although it can improve the noise generated during sliding, the plastic fiber itself does not have good ductility. Therefore, the shallow texture 314 disposed on the inner surface 312 of the airbag body 31 can not only improve the ductility of the airbag body 31, but also suppress the sound generated by the elastic film 311 when it is extended or contracted.

[0046] In summary, the noise suppression surface layer 32 is a non-woven fabric structure composed of plastic fibers, which will not produce stickiness with the surface of the material. When the noise suppression surface layer 32 and the surface of the same material or other materials are squeezed and slid against each other, it is not easy to generate continuous noise, making the noise smaller and lower, and the non-woven fabric structure can also effectively absorb noise. Therefore, the airbag body 31 provided with the noise suppression surface layer 32 and stacked is not easy to make annoying noise when inflating or deflated, and is suitable for being set in a quiet environment, such as in the seat 21 of the vehicle cabin, so the purpose of the present invention can indeed be achieved.

[0047] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. An airbag structure with noise suppression, characterized in that: Include: An airbag body, comprising two elastic films connected to each other, two inner surfaces provided on each of the elastic films and in contact with each other, and two outer surfaces provided on each of the elastic films and opposite to each of the inner surfaces, wherein the peripheries of the elastic films are welded to each other to form an airbag structure; and A noise suppression surface layer is arranged on one of the outer surfaces, and the structure of the noise suppression surface layer is non-woven fabric.

2. The airbag structure with noise suppression as claimed in claim 1, characterized in that: It further comprises another noise suppression surface layer, each of which is disposed on each of the outer surfaces.

3. The airbag structure with noise suppression as claimed in claim 1, characterized in that: Each airbag body further includes a plurality of shallow lines formed on each inner surface.

4. The airbag structure with noise suppression as claimed in claim 1, characterized in that: The surface of the noise suppression surface layer has irregular textures.

5. The airbag structure with noise suppression as claimed in claim 1, characterized in that: The elastic film is made of thermoplastic polyurethane, and the noise suppression surface layer is made of one or a combination of polypropylene, nylon plastic, thermoplastic polyurethane, polyethylene terephthalate, and polyethylene.

6. The airbag structure with noise suppression as claimed in claim 1, characterized in that: The thickness of the elastic film is between 0.1 mm and 1.5 mm, and the thickness of the noise suppression surface layer is between 0.03 mm and 0.5 mm.

7. The airbag structure with noise suppression as claimed in claim 1, characterized in that: The weight per unit area of ​​the noise suppression surface is between 36g / m 2 ~600g / m 2 .

8. The airbag structure with noise suppression as claimed in claim 1, characterized in that: Each airbag body further includes an air delivery pipe connected to each of the elastic films.

9. An airbag structure with noise suppression, characterized in that: Include: A plurality of stacked airbag bodies, each of which comprises two elastic films connected to each other, two inner surfaces provided on each of the elastic films and in contact with each other, and two outer surfaces provided on each of the elastic films and opposite to each of the inner surfaces, the peripheries of each of the elastic films being welded to each other to form an airbag structure, and one outer surface of one of the stacked airbag bodies is connected to one outer surface of another airbag body; and At least one noise suppression surface layer is arranged on one of the two outer surfaces of the airbag body which are stacked and connected to each other, and the structure of the noise suppression surface layer is non-woven fabric.

10. The airbag structure with noise suppression as claimed in claim 9, characterized in that: The number of the noise suppression surface layers is several and they are respectively arranged on the several outer surfaces.

Images