A noise reduction structure of an airbag body and a pneumatic system

Abstract

The application relates to a noise reduction structure of an air bag body and a pneumatic system, the noise reduction structure is arranged in the air bag body, the air bag body is configured as an air bag capable of realizing pneumatic adjustment of a seat; an air supply pipeline is arranged in the air bag, airflow is blown into the air bag through a gas supply assembly and the air supply pipeline; the noise reduction structure is configured as a variable airflow dispersing part, the variable airflow dispersing part is arranged in communication at one end of the air supply pipeline away from the gas supply assembly; when the air bag is inflated, high-speed sprayed airflow is blown to the variable airflow dispersing part through the gas supply assembly and the air supply pipeline, the variable airflow dispersing part gradually presents an expansion state under the blowing action of the airflow, and the airflow is dispersed and blown into the air bag; when the air bag is exhausted, the variable airflow dispersing part gradually presents or has already presented a folding state, and the airflow in the air bag relatively slowly enters the air supply pipeline, and is finally exhausted from the air bag.

Description

Technical Field

[0001] This application relates to the field of pneumatic noise reduction technology, and in particular to a noise reduction structure and pneumatic system for an airbag. Background Technology

[0002] With the continuous development of technology in the field of vehicle transportation, people have higher and higher requirements for vehicle riding comfort. As a result, seat massage devices have emerged, effectively solving the problem of fatigue during long-term driving.

[0003] Most of the massage devices that come with vehicles on the market today use a pneumatic structure. The pneumatic structure uses an air pump as a power source to blow air through a control valve into the support airbag located at the back of the foam pad. By inflating and deflating the support airbag, the seat surface can be partially raised or flattened, thereby achieving a support and massage effect on the human body.

[0004] However, when air is blown into the top support airbag, the rapidly ejected air will produce a loud airflow sound, and these impacts and noises will affect the comfort of the massage. Summary of the Invention

[0005] In order to solve some or all of the above-mentioned technical problems, this application provides a noise reduction structure and pneumatic system for an airbag.

[0006] According to a first aspect of the present invention, a noise reduction structure for an airbag is provided, the noise reduction structure being disposed within the airbag, the airbag being configured as an airbag capable of achieving pneumatic adjustment of a seat; a ventilation tube is inserted into the airbag, and air is blown into the airbag via the air supply assembly and the ventilation tube; the noise reduction structure is configured as a variable airflow dispersion section, the variable airflow dispersion section being connected to the end of the ventilation tube away from the air supply assembly; when the airbag is inflated, high-speed ejected air is blown towards the variable airflow dispersion section via the air supply assembly and the ventilation tube, the variable airflow dispersion section gradually expands under the airflow dispersion effect, and the airflow is dispersed and blown into the airbag; when the airbag deflates, the variable airflow dispersion section gradually becomes or has already become contracted, and the airflow in the airbag enters the ventilation tube relatively slowly, and is eventually discharged from the airbag.

[0007] Furthermore, the variable airflow dispersion section is configured as a tubular fluid disperser, which includes N tubular flaps (N≥2) arranged around the port of the ventilation pipe. The N tubular flaps are allowed to move in a manner of mutual convergence or dispersion relative to the ventilation pipe. It should also be noted that the tubular fluid disperser is always connected to the ventilation pipe, whether the air bag is in an inflated or deflated state. When the air bag is inflated, the airflow blows through the ventilation pipe toward the tubular fluid disperser, and the N tubular flaps disperse and open under the action of the airflow, and the airflow is dispersed and blown into the air bag. When the air bag is deflating, the N tubular flaps retract, the airflow velocity decreases and enters the ventilation pipe relatively slowly, and finally exits the air bag.

[0008] Furthermore, the N tracheal valves can be configured as multi-valve tracheal bodies formed by cutting along the diameter of the ventilation tubing, that is, the N tracheal valves and the ventilation tubing are considered as an integrally formed structure.

[0009] Furthermore, the N tracheal valves can be configured such that each tracheal valve is movably connected to the ventilation tubing, that is, the N tracheal valves and the ventilation tubing are considered to be a detachable connection structure.

[0010] Furthermore, the length of the N tracheal valves can be configured such that their length is greater than 1.5 times the outer diameter of the ventilation tubing.

[0011] Furthermore, the lengths of the N tracheal valves can be configured to be all equal or not all equal.

[0012] Furthermore, several ventilation holes can be added to the N tracheal valves to expand the airflow range.

[0013] Furthermore, a pipe silencer can be added to the ventilation pipe. The pipe silencer is located between the air supply component and the noise reduction structure. The pipe silencer is a porous structure composed of densely packed pores. When the air bag is inflated, the airflow first blows towards the pipe silencer through the ventilation pipe and preferentially disperses from the end of the pipe silencer. At this time, the airflow velocity is partially weakened, and some of the airflow obstructed by the porous structure will disperse from the outer periphery of the porous structure, further weakening the airflow velocity, thereby reducing the air burst noise generated when the airflow is ejected, and achieving primary noise reduction.

[0014] Furthermore, the pipeline silencer can be made of metallic materials, including but not limited to copper, aluminum, or stainless steel; or it can be made of non-metallic materials, including but not limited to plastic or ceramic.

[0015] According to a second aspect of the present invention, a pneumatic system is provided, comprising the noise reduction structure described in the first aspect above, the pneumatic system comprising:

[0016] An airbag body configured to enable pneumatic adjustment of the seat;

[0017] An air supply assembly configured to deliver flowing gas into the airbag;

[0018] A control component configured to control the flow of gas into or out of the airbag;

[0019] A ventilation pipe is placed between the air supply component and the airbag body, and the noise reduction structure is located at the end of the ventilation pipe away from the air supply component.

[0020] As can be seen from the above technical solutions, in the noise reduction structure described in the first aspect and the pneumatic system described in the second aspect of the present invention, when the air bag is inflated, the high-speed ejected air is blown towards the variable airflow dispersion part through the air supply component and the ventilation pipe. Under the effect of airflow dispersion, the variable airflow dispersion part gradually becomes an expanded state, and the airflow is dispersed and blown into the air bag, reducing the airflow velocity. This weakens the air burst noise generated when the airflow blows into the air bag, achieving noise reduction and thus providing the occupant with a better massage comfort. When the air bag is expelling air, the variable airflow dispersion part gradually becomes or has already become a contracted state, reducing the airflow velocity. The airflow in the air bag will enter the ventilation pipe relatively slowly and eventually be discharged from the air bag.

[0021] In addition, the noise reduction structure of the present invention has the advantages of simple structure, easy assembly, and safe and reliable use, which facilitates implementation and promotion. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0023] Figure 1 This is a schematic diagram showing the structure of a tracheal fluid disperser (4 tracheal flaps);

[0024] Figure 2 It is a display Figure 1 A schematic diagram of the state time shift of the noise reduction structure from the contracted state to the expanded state and back to the contracted state.

[0025] Figure 3 When displaying the initial state Figure 1A schematic diagram showing the state of the noise reduction structure and the air bag;

[0026] Figure 4 When displaying the extended state Figure 1 A schematic diagram showing the state of the noise reduction structure and the air bag;

[0027] Figure 5 It displays when the state is close to full. Figure 1 A schematic diagram showing the state of the noise reduction structure and the air bag;

[0028] Figure 6 When displaying a full state Figure 1 A schematic diagram showing the state of the noise reduction structure and the air bag;

[0029] Figure 7 When displaying the holding pressure state Figure 1 A schematic diagram showing the state of the noise reduction structure and the air bag;

[0030] Figure 8 When displaying the deflated state Figure 1 A schematic diagram showing the state of the noise reduction structure and the air bag;

[0031] Figure 9 It indicates that the gas bag is about to be emptied. Figure 1 A schematic diagram showing the state of the noise reduction structure and the air bag;

[0032] Figure 10 This is a schematic diagram showing the structure of a tracheal fluid disperser (6 tracheal valves);

[0033] Figure 11 It is a display Figure 10 A schematic diagram of the state time shift of the noise reduction structure from the contracted state to the expanded state and back to the contracted state.

[0034] Figure 12 When displaying a full state Figure 10 A schematic diagram showing the state of the noise reduction structure and the air bag;

[0035] Figure 13 This is a schematic diagram showing the detachable connection between the ventilation duct and the noise reduction structure.

[0036] Figure 14 It is a display Figure 13 Other detachable structural diagrams;

[0037] Figure 15 When it shows unequal tracheal valve length Figure 10 A schematic diagram of the noise reduction structure;

[0038] Figure 16 When displaying different shapes of the tracheal valve Figure 10 A schematic diagram of the noise reduction structure.

[0039] Explanation of reference numerals in the attached drawings: 1. Noise reduction structure; 11. Variable airflow dispersion section; 12. Tracheal fluid disperser; 13. Tracheal valve; 14. Multi-valve tracheal body; 18. Ventilation port; 19. Airflow gap; 2. Airbag body; 21. Air bag; 3. Ventilation pipeline; 4. Air supply assembly; 5. Pipeline silencer; 51. Porous structure; 6. Pneumatic system; 7. Control assembly. Detailed Implementation

[0040] The following is in conjunction with the appendix Figures 1-16 This application will be described in further detail. Example 1

[0041] As mentioned in the background section, in view of the problems in the prior art, this application proposes a noise reduction structure for an airbag, wherein the noise reduction structure is disposed in the airbag, wherein:

[0042] The airbag 2 is configured as an air bag 21 capable of pneumatic adjustment of the seat; an air passage 3 is inserted into the air bag 21, and airflow is blown into the air bag 21 through the air supply component 4 and the air passage 3;

[0043] The noise reduction structure 1 is configured as a variable airflow dispersion section 11, which is connected to the end of the ventilation pipe 3 away from the air supply component 4.

[0044] When the air bag 21 is inflated, the high-speed airflow is blown through the air supply component 4 and the air pipe 3 to the variable airflow dispersion part 11. Under the effect of airflow dispersion, the variable airflow dispersion part 11 gradually expands and the airflow is dispersed and blown into the air bag 21. The airflow velocity is reduced, thereby reducing the air explosion sound generated when the airflow blows into the air bag 21, achieving noise reduction, and thus bringing a better massage comfort to the occupants.

[0045] When the air bag 21 exhausts gas, the variable airflow dispersion section 11 gradually becomes or has already become converging, the airflow velocity decreases, the gas is slowly released, and the airflow in the air bag 21 will enter the ventilation pipe 3 relatively slowly and finally be discharged from the air bag 21.

[0046] In a preferred embodiment, the noise reduction structure 1 and the ventilation pipe 3 can have a one-to-one correspondence, that is, one set of ventilation pipes 3 corresponds to one set of noise reduction structures 1; alternatively, a branch pipe can be set at the front end of the ventilation pipe 3, and the noise reduction structure 1 can be configured at the front end of the branch pipe. As for the air bag 21, the ventilation pipe 3 and the noise reduction structure 1 can be set in any level air bag 21, or the ventilation pipe 3 and the noise reduction structure 1 can be set in a designated level air bag 21. The specific setting needs to be set according to the actual situation.

[0047] In a preferred embodiment, the variable airflow dispersion section 11 is configured as a tubular fluid disperser 12, which is formed by a flexible pipeline. The tubular fluid disperser 12 includes N tubular flaps 13 (N≥2) arranged around the port of the ventilation pipeline 3. The N tubular flaps 13 form airflow gaps 19 between each other. The N tubular flaps 13 are allowed to move relative to the ventilation pipeline 3 in a manner that allows them to converge or disperse (the accompanying drawings mainly show schematic diagrams of 4 tubular flaps 13 and 6 tubular flaps 13). The N tubular flaps 13 are completely inserted into the air bag 21 to ensure that the N tubular flaps 13 can move in the manner described above. It should also be noted that the tubular fluid disperser 12 always remains connected to the ventilation pipeline 3, regardless of whether the air bag 21 is in an inflated or deflated state.

[0048] When the air bag 21 is inflated, the airflow is blown through the ventilation pipe 3 toward the air tube fluid disperser 12. The N air tube flaps 13 are dispersed and opened under the action of the airflow, and the airflow is dispersed and blown into the air bag 21. Since the airflow range at the port is relatively larger, the airflow velocity is weakened, which ultimately reduces the air pop noise generated when the airflow blows into the air bag 21, thus achieving noise reduction.

[0049] When the air bag 21 vents air outward, the N air valves 13 retract and shrink, the airflow velocity decreases, the gas is released slowly, and the airflow in the air bag 21 will enter the ventilation pipe 3 relatively slowly and eventually be discharged from the air bag 21.

[0050] In a preferred embodiment, the N tracheal flaps 13 can be configured as multi-flap tracheal bodies 14 formed by cutting along the diameter of the ventilation pipe 3. That is, the N tracheal flaps 13 and the ventilation pipe 3 are regarded as an integral structure. The advantage of this arrangement is that no additional parts need to be added. Noise reduction can be achieved by relying solely on the improvement of the ventilation pipe 3 itself. The design concept is ingenious and the noise reduction effect is also good.

[0051] In a preferred embodiment, the N tracheal flaps 13 can be configured such that each tracheal flap 13 is movably connected to the ventilation tube 3, that is, the N tracheal flaps 13 and the ventilation tube 3 are considered to be a detachable connection structure. The detachable connection method includes, but is not limited to, plugging or snapping. The advantage of this arrangement is that the noise reduction structure 1 can be regarded as a separate component and installed at the end of the ventilation tube 3 in some way, which greatly increases the flexibility of use.

[0052] In a preferred embodiment, the length of the N tracheal flaps 13 can be configured such that its length is greater than 1.5 times the outer diameter of the ventilation tube 3. The advantage of this configuration is that when the air bag 21 is inflated, the N tracheal flaps 13 can have a better opening angle, the airflow range is larger, and the noise reduction effect is better.

[0053] In a preferred embodiment, the lengths of the N tracheal valves 13 can be configured to be all of equal length or not all of equal length, that is, the lengths of the tracheal valves 13 can be flexibly configured.

[0054] In a preferred embodiment, the shape of the N tracheal valves 13 can be flexibly configured, such as rectangular, triangular or trapezoidal, but is not limited thereto.

[0055] In a preferred embodiment, several ventilation holes 18 may be added to the N tracheal valves 13. When the air bag 21 is inflated, part of the airflow flowing through the tracheal fluid diffuser 12 can be dispersed outward along the ventilation holes 18 and blown into the air bag 21 to expand the airflow range and further reduce the air pop sound.

[0056] Here, the principle of noise reduction is explained further:

[0057] Assuming the air pressure output from the air supply component 4 is P, the air pressure entering the ventilation pipe 3 is P1, and the air pressure flowing into the air bag 21 through the ventilation pipe 3 is P2, since the area of ​​the ventilation pipe 3 is smaller than the area of ​​the air bag 21, P2 is much smaller than P1. According to the Bernoulli effect, when fluid flows from a high-pressure area to a low-pressure area, the increase in flow velocity will lead to a decrease in local pressure. This pressure difference can generate airflow.

[0058] When the airflow passes through the narrow section of the ventilation pipe 3, the flow velocity increases, and the pressure recovers at the outlet or downstream area. This pressure will produce a popping sound, so the pressure difference is one of the main factors causing the popping sound. When the airflow flows into the air bag 21 through the ventilation pipe 3, under the action of the noise reduction structure 1, the ventilation range when the airflow enters the air bag 21 will be gradually expanded, so that the pressure P1 slowly becomes P2, the airflow velocity decreases, and thus the popping sound is reduced.

[0059] In a preferred embodiment, a pipe silencer 5 may be added to the ventilation pipe 3. The pipe silencer 5 is a porous structure 51 formed by the aggregation of dense pores. The pipe silencer 5 may be made of metal materials, including but not limited to copper, aluminum or stainless steel; or it may be made of non-metallic materials, including but not limited to plastic or ceramic.

[0060] When the air bag 21 is inflated, the airflow first blows through the ventilation pipe 3 to the pipe silencer 5, and preferentially disperses from the end of the pipe silencer 5. At this time, the airflow velocity is partially weakened, and some of the airflow obstructed by the porous structure 51 will disperse from the outer periphery of the porous structure 51, further weakening the airflow velocity, thereby reducing the air explosion noise generated when the airflow is ejected, achieving primary noise reduction. The airflow after primary noise reduction then undergoes secondary noise reduction through the noise reduction structure 1 at the end of the ventilation pipe 3, further weakening the air explosion noise when the airflow is ejected. Example 2

[0061] Based on the foregoing embodiments, this application proposes a pneumatic system comprising the noise reduction structure 1 described in the above embodiments. The noise reduction device can be installed in a pneumatic system 6 such as a lumbar support, leg support, back massager, or shoulder massager, but is not limited thereto. The pneumatic system 6 includes:

[0062] Airbag 2, wherein the gas assembly is configured to achieve pneumatic adjustment of the seat;

[0063] Gas supply assembly 4, which is configured to supply flowing gas into the airbag body 2;

[0064] Control component 7, the control component 7 being configured to control the flow of gas into or out of the airbag 2;

[0065] Ventilation pipe 3 is placed between the air supply component 4 and the airbag body 2, and the noise reduction structure 1 is located at the end of the ventilation pipe 3 away from the air supply component 4.

[0066] When the airbag 2 is inflated, the air supply component 4 provides the flowing gas, and the control component 7 conducts the flowing gas to the airbag 2 through the ventilation pipe 3, and reduces the air pop noise when air is blown into the airbag 2 through the noise reduction structure 1 at the end of the ventilation pipe 3, so as to achieve noise reduction.

[0067] In the description of this application, it should be understood that the terms "vertical," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 the present invention.

[0068] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0069] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A noise reduction structure of an airbag body, characterized in that, the noise reduction structure (1) is arranged in the airbag body (2), and the airbag body (2) is configured as an air bag (21) capable of realizing seat pneumatic adjustment; an air supply pipeline (3) is arranged in the air bag (21); and air flow is blown into the air bag (21) through a gas supply assembly (4) of the seat and the air supply pipeline (3); the noise reduction structure (1) is configured as a variable air flow dispersion part (11), and the variable air flow dispersion part (11) is arranged in communication at one end of the air supply pipeline (3) away from the gas supply assembly (4); when the air bag (21) is inflated, high-speed air flow is blown to the variable air flow dispersion part (11) through the gas supply assembly (4) and the air supply pipeline (3); the variable air flow dispersion part (11) gradually presents an expanded state under the air flow dispersion effect, and the air flow is dispersed and blown into the air bag (21); when the air bag (21) is exhausted, the variable air flow dispersion part (11) gradually presents or has already presented a folding state, and the air flow in the air bag (21) relatively slowly enters the air supply pipeline (3) and is finally exhausted from the air bag (21).

2. The noise reduction structure according to claim 1, characterized in that, the variable air flow dispersion part (11) is configured as a tubular fluid disperser (12), the tubular fluid disperser (12) comprises N tubular petals (13) arranged in a closed manner at the port of the air supply pipeline (3), N≥2, and the N tubular petals (13) are allowed to move in a manner of mutual folding or dispersion opening relative to the air supply pipeline (3); the tubular fluid disperser (12) always communicates with the air supply pipeline (3) regardless of whether the air bag (21) is in an inflated state or a deflated state; when the air bag (21) is inflated, air flow is blown to the tubular fluid disperser (12) through the air supply pipeline (3); the N tubular petals (13) are dispersed and opened under the action of the air flow, and the air flow is dispersed and blown into the air bag (21); when the air bag (21) is exhausted, the N tubular petals (13) are folded and retracted, the air flow rate decreases and relatively slowly enters the air supply pipeline (3), and is finally exhausted from the air bag (21).

3. The noise reduction structure according to claim 2, characterized in that, the N tubular petals (13) are configured as a multi-petal tubular body (14) formed by cutting along the tube diameter direction of the air supply pipeline (3), that is, the N tubular petals (13) and the air supply pipeline (3) are considered as an integral molding structure.

4. The noise reduction structure according to claim 2, characterized in that, the N tubular petals (13) are configured to be movably connected with the air supply pipeline (3), that is, the N tubular petals (13) and the air supply pipeline (3) are considered as a detachable connection structure.

5. The noise reduction structure according to claim 3 or 4, characterized in that, The length of the N tracheal flaps (13) is configured to be greater than 1.5 times the outer diameter of the ventilation pipeline (3).

6. The noise reduction structure according to claim 3 or 4, characterized in that: The length of the N tracheal flaps (13) is configured to be all equal or not all equal.

7. The noise reduction structure according to claim 3 or 4, characterized in that: A plurality of ventilation holes (18) for expanding the airflow circulation range are additionally provided on the N tracheal flaps (13).

8. The noise reduction structure according to claim 1, characterized in that: A pipeline silencer (5) is additionally provided in the ventilation pipeline (3), the pipeline silencer (5) is arranged between the air supply assembly (4) and the noise reduction structure (1), the pipeline silencer (5) is a porous structure (51) formed by densely packed pores, When the air bag (21) is inflated, the airflow first blows to the pipeline silencer (5) through the ventilation pipeline (3) and preferentially disperses from the end of the pipeline silencer (5), at this time the airflow velocity is partially weakened, and the airflow partially hindered by the porous structure (51) disperses from the periphery of the porous structure (51), the airflow velocity is further weakened, thereby weakening the air blast sound generated when the airflow is ejected, achieving primary noise reduction.

9. The noise reduction structure according to claim 8, characterized in that: The pipeline silencer (5) is configured to be made of metal materials, including copper, aluminum or stainless steel; or configured to be made of non-metallic materials, including plastic or ceramic.

10. A pneumatic system characterized by: The pneumatic system comprises the noise reduction structure according to any one of claims 1-9, and the pneumatic system comprises: An air bag body (2) configured to achieve pneumatic adjustment of a seat; An air supply assembly (4) configured to deliver flowing gas into the air bag body (2); A control assembly (7) configured to control the flowing gas to enter or exit the air bag body (2); a ventilation pipeline (3) arranged between the air supply assembly (4) and the air bag body (2), and the noise reduction structure (1) is arranged at one end of the ventilation pipeline (3) away from the air supply assembly (4).

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