Air bag structure and product with same

Abstract

The utility model discloses an air bag structure and a product with the air bag structure, and relates to the technical field of air bag inflation structures, the air bag structure comprises a bag body, and the bag body comprises an air storage cavity; the air inlet structure is arranged on the bag body, an air path of the air inlet structure is communicated with the air storage cavity, and the air path is linear. An air path of an air inlet structure of an existing air bag structure has a certain corner (such as a 90-degree right angle). Experimental research shows that airflow enters the air bag after passing through the 90-degree turn, when the airflow passes through the turn, the direction and the speed of the airflow can be changed, and air partial pressure difference is caused; when gas rapidly passes through the elbow, pressure waves can be generated, the pressure waves can impact the inner wall of the elbow, and noise is generated. The air path of the air inlet structure is arranged to be linear, so that air can smoothly and directly enter the air storage cavity, collision between airflow and the inner wall of the air path is reduced, vortex caused by sudden change of the airflow direction is also avoided, and the noise generation probability is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of airbag inflation structures, and particularly relates to an airbag structure and a product having the airbag structure. Background Art

[0002] With the improvement of people's living standards, airbag products have become more and more popular. However, when the airbag inflates and deflates during use, the airflow noise will be very loud. Especially in a quiet use scenario, the noise generated instantaneously during inflation and deflation is relatively large, seriously affecting the user experience. To eliminate the airflow noise, currently on the market, mufflers are installed on the external air path of the airbag or sound-absorbing cotton is added inside the air tube. However, the effect is limited, and there is still airflow noise during inflation and deflation. Utility Model Content

[0003] The present application aims to solve one of the above technical problems in the prior art. To this end, an embodiment of the present application provides an airbag structure.

[0004] An embodiment of the present application further provides a product having an airbag structure.

[0005] According to an embodiment of the first aspect of the present application, there is provided an airbag structure, including an airbag body, the airbag body including a gas storage cavity; and an air inlet structure disposed on the airbag body, the air path of the air inlet structure communicating with the gas storage cavity, and the air path of the air inlet structure being linear.

[0006] The above airbag structure has at least the following beneficial effects: The present application sets the air path of the air inlet structure to be linear, which can allow the gas to smoothly enter the gas storage cavity directly, reducing the collision between the airflow and the inner wall of the air path, and also avoiding the sudden change of the airflow direction to generate eddy currents, reducing the probability of noise generation.

[0007] According to the airbag structure described in the embodiment of the first aspect of the present application, the airbag structure further includes a porous material. The end of the air path communicating with the gas storage cavity is set as an air outlet end, and the porous material is disposed in the air path or at the air outlet end.

[0008] According to the airbag structure described in the embodiment of the first aspect of the present application, the airbag structure further includes a buffer cavity, the buffer cavity is disposed in the gas storage cavity, the porous material is disposed in the buffer cavity, the air outlet end communicates with the buffer cavity, and a gas dispersion port is provided on one side wall of the buffer cavity.

[0009] According to the airbag structure described in the embodiment of the first aspect of the present application, the porous material fills the buffer cavity.

[0010] According to the airbag structure described in the first aspect embodiment of the present application, the air outlet end and the air diffusing port are respectively located on both sides of the porous material in the thickness direction, and the projection of the air outlet end along the extending direction of the air path is within the air diffusing port.

[0011] According to the airbag structure described in the first aspect embodiment of the present application, the porous material is PET cotton.

[0012] According to the airbag structure described in the first aspect embodiment of the present application, the airbag body is made of at least one material sheet, and a noise reduction layer is provided on the surface of the material sheet.

[0013] According to the airbag structure described in the first aspect embodiment of the present application, the noise reduction layer is a cotton material.

[0014] According to the airbag structure described in the first aspect embodiment of the present application, the air intake structure is a straight-through air nozzle.

[0015] According to the second aspect embodiment of the present application, a product with an airbag structure is provided, including at least one of the above-mentioned airbag structures; when at least two airbag structures are provided, two adjacent airbag structures are connected through a Y-shaped three-way joint.

[0016] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. Description of the Drawings

[0017] The present application will be further described below in conjunction with the drawings and embodiments;

[0018] Figure 1 It is a schematic diagram of the air intake structure of the existing airbag structure in the embodiment of the present application;

[0019] Figure 2 It is a schematic diagram of the air flow passing through the air intake structure of the existing airbag structure in the embodiment of the present application;

[0020] Figure 3 It is a schematic diagram of the structure of the airbag structure in the embodiment of the present application;

[0021] Figure 4 It is a cross-sectional view of the airbag structure in the embodiment of the present application;

[0022] Figure 5 It is a cross-sectional view of the air intake structure in the embodiment of the present application;

[0023] Figure 6 It is a schematic diagram of the composite structure of the material sheet and the noise reduction layer in the embodiment of the present application;

[0024] Figure 7It is a schematic connection diagram of a product with two airbag structures in an embodiment of the present application;

[0025] Figure 8 It is a schematic connection diagram of a product with multiple airbag structures in an embodiment of the present application.

[0026] Reference numerals: airbag member 100, right-angle elbow 110, first eddy current region 111, second eddy current region 112, bladder 200, air storage cavity 201, first composite sheet 210, second composite sheet 220, air intake structure 230, connecting portion 231, support member 240, air dispersion port 241, porous material 250, noise reduction layer 261, material sheet 262, Y-shaped tee joint 270. Detailed implementation manners

[0027] This part will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it should not be construed as a limitation on the protection scope of the present application.

[0028] In the description of the present application, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application.

[0029] In the description of the present application, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, exceeding, etc. are understood as not including the recited number, and above, below, within, etc. are understood as including the recited number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0030] In the description of the present application, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present application in combination with the specific content of the technical solution.

[0031] Refer to Figure 1, in the prior art, the intake structure 230 of the airbag component 100 selects a right-angle elbow 110. Although the right-angle elbow 110 can reduce the occupied space of the intake structure 230, through the experimental research of this application, it can be known that when the air flow passes through the right-angle elbow 110 quickly, both the air flow direction and speed will change, resulting in gas partial pressure differences. When the gas quickly passes through the elbow corner, pressure waves will be generated, and these pressure waves will impact the inner wall of the elbow to generate noise, which is also one of the sources of airbag inflation noise. Therefore, the design of the intake structure 230 cannot be ignored.

[0032] Specifically, the experimental research obtained the air flow direction schematic diagram of the air flow passing through the right-angle elbow 110 as Figure 2 shown. When the air flow passes through the right-angle corner, due to the impact of the air flow on the pipe wall, a first eddy current area 111 is generated; and due to the inertia of the air flow, the boundary layer detaches from the inner wall, generating a second eddy current area 112. As the air flow continues to flow in, even very small collision noises can be amplified to form relatively obvious noises.

[0033] Currently, the situation that the right-angle elbow 110 will generate noise is not known to other airbag product designers, so it is not clear that the right-angle elbow 110 is also the source of noise generation.

[0034] In response to this situation, this application provides a newly designed airbag structure, as Figure 3 shown. The airbag structure includes a bladder 200, and the bladder 200 includes a gas storage cavity 201.

[0035] The intake structure 230 is arranged on the bladder 200, and the air path of the intake structure 230 is communicated with the gas storage cavity 201, and the air path of the intake structure 230 is in a straight line.

[0036] The air paths of the intake structures of the existing airbag structures are not in a straight line. The common air paths have a certain corner (such as a 90° right angle). Through experimental research, it is known that when the air flow passes through a 90° turn and then enters the airbag, when the air flow passes through the corner, both the air flow direction and speed will change, resulting in gas partial pressure differences; when the gas quickly passes through the elbow, pressure waves will be generated, and these pressure waves will impact the inner wall of the elbow to generate noise. The existing airbag product manufacturers do not know one of the reasons for the noise generated by the air path of the intake structure.

[0037] To solve this problem, according to the experimental research results. This application sets the air path of the intake structure 230 to be in a straight line, which can allow the gas to directly enter the gas storage cavity 201 smoothly, reduce the collision between the air flow and the inner wall of the air path, and also avoid the sudden change of the air flow direction to generate eddy currents, reducing the probability of noise generation.

[0038] As Figure 3As shown, the air intake structure 230 includes a connecting portion 231 which surrounds the air passage. The connecting portion 231 is heat-melted and fixed to the inner wall of the bladder 200. A part of the air intake structure 230 is exposed outside the bladder 200 to facilitate docking with an external air tube to complete the inflation operation. The material of the connecting portion 231 is selected as a plastic material so that it can be fixed by heat-melting.

[0039] In the embodiment of the present application, the air intake structure 230 is a straight-through air nozzle. Of course, in some other embodiments, the air intake structure 230 can also be an air inlet pipe or other standard parts or processed parts with a linear air passage.

[0040] In some embodiments, the airbag structure further includes a porous material 250. The end of the air passage communicating with the air storage cavity 201 is set as an air outlet end, and the porous material 250 is arranged in the air passage or at the air outlet end.

[0041] In some embodiments, the porous material 250 is arranged at the air outlet end of the air passage, that is, the porous material 250 is fixed at the air outlet end and exposed in the air storage cavity 201. The porous material 250 can be made into a sheet shape, a block shape or a spherical shape. When inflating, when the air flow enters the air storage cavity 201 from the air passage, it first passes through the porous material 250 and slowly diverges, so that the flow rate of the air flow is further reduced. While not affecting the inflation speed, the noise caused by the inflation air flow is reduced.

[0042] In some other embodiments, the porous material 250 can also be directly arranged in the air passage to achieve further sound attenuation treatment.

[0043] In some embodiments, the airbag structure further includes a buffer cavity which is arranged in the air storage cavity 201. The air outlet end communicates with the buffer cavity, and a diffusing port 241 is arranged on one side wall of the buffer cavity. The buffer cavity further slows down the flow rate of the air flow, and then the decelerated air flow is guided to the air storage cavity 201 through the diffusing port 241, further reducing the probability of generating noise.

[0044] In some embodiments, the porous material 250 is arranged in the buffer cavity. The buffer cavity and the porous material 250 can further slow down the flow rate of the air flow, and reduce the noise caused by the air flow while not affecting the inflation or deflation speed.

[0045] Furthermore, as Figure 4 and Figure 5 shown, the buffer cavity is filled with the porous material 250.

[0046] By adding the buffer cavity and cooperating with the porous material 250, the flow rate of inflation and deflation can be further stably reduced, thereby significantly reducing the air flow noise and improving the user experience. Filling the air storage cavity 201 with the porous material 250 can avoid large voids in the buffer cavity and reduce the generation of eddy currents at the voids, which affects the air intake flow rate.

[0047] Of course, in some other embodiments, the porous material 250 may not fill up the buffer cavity.

[0048] Specifically, when inflating, the airflow enters the air storage chamber 201 from the air path and first passes through the porous material 250 and slowly diffuses to various places in the buffer chamber. The airflow velocity is further decelerated and then flows out from the air outlet of the buffer chamber, which does not affect the inflation speed and reduces the noise caused by the inflation airflow. When deflated, the gas in the air storage chamber 201 slowly converges into the air path through the buffer chamber, which can effectively slow down the airflow velocity.

[0049] Furthermore, the gas outlet and the diffuser 241 are located on both sides of the porous material 250 in the thickness direction, and the projection of the gas outlet along the extension direction of the gas path is in the diffuser 241. That is, the projection of the gas outlet along the axial direction of the gas path is located within the opening range of the diffuser 241.

[0050] In the embodiment of the present application, the opening area of the air diffusion port 241 is larger than the cross-sectional area of the air outlet end so as not to affect the air intake flow rate.

[0051] Specifically, when there is one air diffusion port 241, the air diffusion port 241 becomes the air outlet of the buffer cavity, the air outlet end is located at one end or one side of the buffer cavity, and the other end or the other side of the buffer cavity is provided with the air diffusion port 241. That is, the air diffusion port 241 is aligned with the air outlet end of the gas path, avoiding the need for the airflow to make a turning motion from the air outlet end to the air diffusion port 241, effectively reducing noise, and also reducing the difficulty of the airflow entering the air storage cavity 201.

[0052] Multiple air diffusion ports 241 can be provided to ensure that one air diffusion port 241 is aligned with the air outlet, and the remaining air diffusion ports 241 can be distributed at intervals on one or more cavity walls of the buffer cavity. Multiple air diffusion ports 241 are conducive to the rapid distribution of airflow.

[0053] In the embodiment of the present application, the basic shape of the buffer cavity is formed by a support member 240 made of a plastic material, and then the edge of the support member 240 is fixed to the inside of the capsule 200 by hot-melt bonding to form the buffer cavity.

[0054] The material of the support member 240 may be TUP. Of course, the support member 240 may also be made of other plastic materials with certain structural rigidity, such as ABS. The thickness of the support member 240 should be as thin as possible.

[0055] In the embodiment of the present application, the porous material 250 is PET cotton. PET cotton is a porous structure that can reduce the flow rate of inflation and deflation, thereby significantly reducing airflow noise and improving the user experience.

[0056] PET cotton is made through a needle punching process. Numerous tiny pores are evenly distributed on the fiber surface of the cotton body. Through these pores, various fluids can be filtered and absorbed, and the airflow noise entering the airbag can be greatly reduced. This PET cotton is usually made of PET plastic particles. It has a compact structure, is soft and fine, has good porosity and filtration efficiency. Since it is made of plastic raw materials, it has good stability and a long service life, and there is basically no need to worry about the problem of aging and shedding. Ordinary sound-absorbing sponges are generally made of polyurethane foam or polyester fiber. It has good absorbency and elasticity, but its filtration efficiency is relatively low, and its service life is short. There is a risk of powdering and chipping after 2-3 years.

[0057] In some embodiments, the bladder 200 is made of at least one material sheet 262. When the bladder 200 is made of one material sheet 262, the size of the material sheet 262 is pre-cut according to the required shape of the bladder 200. After a hole structure for placing the air intake structure 230 is opened at the corresponding position, the air intake structure 230 is heat-melted and fixed to the inner side of the material sheet 262. If a buffer chamber needs to be set, it is also assembled and connected together during this period; when all the sound-absorbing components are installed, the material sheet 262 is folded according to the required shape and then a sealed air storage chamber 201 is formed by heat-melting and fixing. By introducing gas into the air storage chamber 201, the required shape of the bladder 200 can be obtained.

[0058] The commonly used airbag cavities on the market are all made of pure TPU material. A disadvantage of this kind of airbag is that when it is inflated, it is easy to produce a "pop" noise due to volume change, and this sound is relatively loud and clear. In the embodiments of the present application, to solve the problem of the "pop" noise generated by the volume change during inflation, a noise reduction layer 261 is provided on the outer surface of the material sheet 262, and the noise generated by the volume change is reduced through the noise reduction layer 261.

[0059] Specifically, as Figure 6 shown, the material sheet 262 is made of TPU material, and the noise reduction layer 261 is made of cotton material, and the cotton material can specifically be knitted cotton. The material sheet 262 and the noise reduction layer 261 can be made into one body. That is, a noise reduction material is attached to the material sheet 262 made of TPU film by bonding or heat-melting and fixing to form a layer structure with a noise reduction layer 261, and a new type of fabric is obtained by combining the characteristics of the material sheet 262 and the noise reduction layer 261. Through repeated research and practice, setting needle-punched cotton material on the surface of the bladder 200 can effectively reduce the "pop" sound generated by the airbag during inflation, that is, the noise reduction effect of selecting needle-punched cotton for the noise reduction layer 261 is obvious.

[0060] In some embodiments of the present application, the bladder 200 includes two relatively arranged planes, and the bladder 200 with two planes is convenient for stacking and parallel use.

[0061] In an embodiment shown in the present application, as Figure 3 shown, the bladder 200 includes a first composite sheet 210 and a second composite sheet 220. Both the first composite sheet 210 and the second composite sheet 220 are composite materials formed by laminating TPU and needle-punched cotton. When manufacturing the bladder 200, two pieces of the first composite sheet 210 are provided. The two ends of the second composite sheet 220 are heat-sealed to form a ring. The two pieces of the first composite sheet 210 are heat-sealed to the side edges of the ring-shaped second composite sheet 220 by heat fusion to form a closed air storage cavity 201. The air inlet structure 230 is arranged on the second composite sheet 220.

[0062] The straight-through air path, the buffer cavity, the porous material 250 and the noise reduction layer 261 are provided, so that the bladder 200 has a good noise reduction effect and can improve the user experience.

[0063] The embodiment of the present application provides a product having at least one airbag structure.

[0064] In some embodiments, the airbag structure of the product having an airbag structure can be provided with one. For example, the product having an airbag structure can be an inflatable pillow or a pillow, and the product having an airbag structure can also be an inflatable mattress.

[0065] As Figure 7 and Figure 8 shown in some products having an airbag structure, at least two airbag structures are provided, and two adjacent airbag structures are connected through a Y-shaped three-way joint 270. That is, multiple airbag structures are connected in parallel.

[0066] In existing airbag products, multiple airbags are often connected and combined together. Therefore, it is also necessary to solve the problem of high noise when multiple airbags are connected. Since the existing connection between airbags usually uses a 90° right-angle elbow nozzle and a T-shaped nozzle connected together through a trachea, in this connection method, the air flow noise of the airbag will become larger, and the more airbags are connected, the greater the noise superposition.

[0067] The airbag structure of the embodiment of the present application changes the air inlet structure 230 and uniformly changes the air inlet structure 230 to a straight-through nozzle. When assembling and splicing products having multiple airbag structures, an equal-diameter Y-shaped three-way joint 270 is used to connect between the bladders 200, which can effectively reduce the air flow noise during inflation and deflation, and is lower than the noise of a single airbag.

[0068] Specifically, one side of the Y-shaped three-way joint 270 has two shunt interfaces arranged side by side, and the other side has a confluence interface. When two bladders 200 are connected in parallel, the air inlet structures 230 of the two bladders 200 are respectively docked with the two shunt interfaces on the same side, and the confluence interface on the other side is docked with the gas source pipeline.

[0069] When three capsules 200 are connected in parallel, the confluence interface of the first Y-shaped tee joint 270 that has already connected two capsules 200 in parallel is docked with one of the diverging interfaces of the second Y-shaped tee joint 270, and the remaining diverging interface of the second Y-shaped tee joint 270 is docked with the air inlet structure 230 of the third capsule 200 to achieve the parallel connection of the three capsules 200.

[0070] After the three capsules 200 are connected in parallel through two Y-shaped tee joints 270, if there is no need to dock an additional capsule 200, the idle confluence interface is docked with the gas source pipeline; if it is necessary to connect another capsule 200 in parallel, the parallel connection method is the same as that of connecting the third capsule 200 in parallel, that is, the idle confluence interface and the air inlet structure 230 of the fourth capsule 200 are respectively docked with the two diverging interfaces of the third Y-shaped tee joint 270, so that the splicing of multiple capsules 200 can be completed.

[0071] In addition, since PET cotton is provided at the air outlet end of the air inlet structure 230 in each capsule 200, when 2 or N capsules 200 are directly connected to each other, it can well solve the problem of the noise of gas cross-flow generated during the flow of gas in the connecting pipeline after the multi-chamber capsules 200 are interconnected, and achieve the reduction and elimination of the cross-flow noise.

[0072] The embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. An airbag structure, characterized in that: including a bladder, the bladder including an air storage cavity; and an air inlet structure disposed on the bladder, an air path of the air inlet structure communicating with the air storage cavity, and the air path of the air inlet structure being linear.

2. The airbag structure according to claim 1, wherein: The airbag structure further includes a porous material. An end of the air path communicating with the air storage cavity is set as an air outlet end, and the porous material is disposed in the air path or at the air outlet end.

3. The airbag structure according to claim 2, wherein: The airbag structure further includes a buffer cavity. The buffer cavity is disposed in the air storage cavity. The porous material is disposed in the buffer cavity. The air outlet end communicates with the buffer cavity, and a side wall of the buffer cavity is provided with a gas diffusing opening.

4. The airbag structure according to claim 3, wherein: The porous material fills the buffer cavity.

5. The airbag structure according to claim 4, wherein: The air outlet end and the gas diffusing opening are respectively located on two sides of the thickness direction of the porous material, and a projection of the air outlet end along the extending direction of the air path is within the gas diffusing opening.

6. The airbag structure according to claim 2, wherein: The porous material is PET cotton.

7. The airbag structure according to claim 1, characterized in that: The bladder is made of at least one material sheet, and a noise reduction layer is disposed on a surface of the material sheet.

8. The airbag structure according to claim 7, characterized in that: The noise reduction layer is a cotton material.

9. The airbag structure according to any one of claims 1 to 8, characterized in that: The air inlet structure is a straight-through nozzle.

10. A product with an airbag structure, characterized in that: including at least one airbag structure according to any one of claims 1 to 9; when at least two airbag structures are provided, two adjacent airbag structures are communicated through a Y-shaped three-way joint.

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