Noise reduction structure of air bag body and pneumatic system

Abstract

The invention 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, and the air bag body is configured to be an air bag capable of achieving pneumatic adjustment of a seat; a ventilation pipeline is inserted into the air bag, and air flow is blown into the air bag through the air supply assembly and the ventilation pipeline; the noise reduction structure is configured to be a variable airflow dispersion part, and the variable airflow dispersion part is arranged at the end, away from the air supply assembly, of the ventilation pipeline in a communicating mode. When the air bag is inflated, air flow sprayed out at a high speed is blown to the variable air flow dispersion part through the air supply assembly and the ventilation pipeline, the variable air flow dispersion part is gradually in an expansion state under the blowing-away action of the air flow, and the air flow is dispersed and blown into the air bag; when the air bag exhausts air outwards, the variable airflow dispersion part is gradually or already in a closed state, and airflow in the air bag can relatively slowly enter the ventilation pipeline and is finally exhausted out of the air bag.

Description

Technical Field

[0001] The present application relates to the technical field of pneumatic noise reduction, and in particular to a noise reduction structure of an airbag and a pneumatic system. Background Art

[0002] With the continuous development of technology in the field of vehicle transportation, people have higher and higher requirements for vehicle riding comfort. Seat massage devices have come into being, effectively solving the problem of fatigue caused by long-term driving.

[0003] Currently, most of the massage devices that come with vehicles on the market adopt a pneumatic structure. The pneumatic structure uses an air pump as the power source, blowing air through the relevant control valve body into the top support airbag placed behind the foam pad. By inflating and deflating the top support airbag body, the seat surface can be partially raised or flattened, thereby achieving a supporting and massaging effect on the human body.

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

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

[0006] According to a first aspect of the present invention, a noise reduction structure of an airbag body is provided, the noise reduction structure is arranged in the airbag body, and the airbag body is configured as an air bag capable of realizing pneumatic adjustment of the seat; a ventilation pipe is inserted in the airbag, and air is blown into the airbag through the air supply component and the ventilation pipe; the noise reduction structure is configured as a variable airflow dispersion part, and the variable airflow dispersion part is connected and arranged at an end of the ventilation pipe away from the air supply component; when the airbag is inflated, the high-speed ejected air is blown toward the variable airflow dispersion part through the air supply component and the ventilation pipe, and the variable airflow dispersion part gradually presents an expanded state under the action of airflow dispersion, and the airflow is dispersed and blown into the airbag; when the airbag is exhausted outward, the variable airflow dispersion part gradually presents or has presented a contracted state, and the airflow in the airbag will enter the ventilation pipe relatively slowly and finally be discharged from the airbag.

[0007] Furthermore, the variable airflow dispersion portion is configured as a tracheal fluid disperser, which includes N tracheal flaps (N≥2) arranged along the port of the ventilation duct, and the N tracheal flaps are allowed to move relative to the ventilation duct in a manner of gathering together or dispersing and opening. It should be noted that the tracheal fluid disperser always remains connected to the ventilation duct regardless of whether the air bag is in an inflated state or a deflated state; when the air bag is inflated, the air flow is blown toward the tracheal fluid disperser through the ventilation duct, and the N tracheal flaps are dispersed and opened under the action of the air flow, and the air flow is dispersed and blown into the air bag; when the air bag is exhausted outward, the N tracheal flaps retract, the air flow velocity is reduced, and it enters the ventilation duct relatively slowly, and is finally discharged from the air bag.

[0008] Furthermore, the N tracheal flaps may be configured as a multi-flap tracheal body formed by cutting the ventilation line along its own diameter direction, that is, the N tracheal flaps and the ventilation line are regarded as an integrally formed structure.

[0009] Furthermore, the N tracheal flaps may be configured such that each of the tracheal flaps is movably connected to the ventilation line, that is, the N tracheal flaps and the ventilation line are regarded as a detachable connection structure.

[0010] Furthermore, the lengths of the N tracheal valves may be configured to be greater than 1.5 times the outer diameter of the ventilation tube.

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

[0012] Furthermore, a number of vents for expanding the airflow range may be additionally provided on the N tracheal valves.

[0013] Furthermore, a pipeline silencer can be added to the ventilation pipeline. The pipeline silencer is arranged between the air supply component and the noise reduction structure. The pipeline silencer is a porous structure formed by densely distributed pores. When the air bag is inflated, the air flow first blows to the pipeline silencer through the ventilation pipeline, and is preferentially dispersed and blown out from the end of the pipeline silencer. At this time, the air flow velocity is partially weakened, and part of the air flow obstructed by the porous structure will be dispersed and blown out from the periphery of the porous structure. The air flow velocity is further weakened, thereby weakening the air explosion sound generated when the air flow is ejected, thereby achieving primary noise reduction.

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

[0015] According to a second aspect of the present invention, there is provided a pneumatic system comprising the noise reduction structure according to the first aspect, the pneumatic system comprising: an airbag body, the airbag body being configured to achieve pneumatic adjustment of the seat; an air supply assembly configured to deliver flowing gas into the airbag; a control component configured to control the flow of gas to enter or exit the air bag; The ventilation pipeline is placed between the air supply component and the airbag body, and the noise reduction structure is arranged at one end of the ventilation pipeline away from the air supply component.

[0016] It can be seen from the above technical solution that in the noise reduction structure described in the first aspect of the present invention and the pneumatic system described in the second aspect, when the air bag is inflated, the high-speed ejected air is blown to the variable airflow dispersion part through the air supply component and the ventilation duct. The variable airflow dispersion part gradually presents an expansion state under the action of airflow dispersion, and the airflow is dispersed and blown into the air bag, and the airflow velocity is reduced, thereby weakening the air explosion sound generated when the airflow blows into the air bag, achieving noise reduction, and then bringing better massage comfort to the occupant; when the air bag is exhausted outward, the variable airflow dispersion part gradually presents or has presented a contraction state, the airflow velocity is reduced, and the airflow in the air bag will enter the ventilation duct relatively slowly and finally be discharged from the air bag.

[0017] In addition, the noise reduction structure of the present invention has the advantages of simple structure, easy assembly, safe and reliable use, and is easy to implement, promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0019] Figure 1 It is a schematic diagram showing the structure of a tracheal fluid disperser (4 tracheal valves); Figure 2 Yes Display Figure 1 Schematic diagram of the time shift of the noise reduction structure from the collapsed state to the expanded state and then to the collapsed state; Figure 3 When the initial state is displayed Figure 1 Schematic diagram of the status of the noise reduction structure and airbag; Figure 4 When the expansion state is displayed Figure 1 Schematic diagram of the status of the noise reduction structure and airbag; Figure 5 It shows that it is close to full state Figure 1 Schematic diagram of the status of the noise reduction structure and airbag; Figure 6 When the display is full Figure 1 Schematic diagram of the status of the noise reduction structure and airbag; Figure 7 When the pressure holding state is displayed Figure 1 Schematic diagram of the status of the noise reduction structure and airbag; Figure 8 When the deflated state is displayed Figure 1 Schematic diagram of the status of the noise reduction structure and airbag; Figure 9 It shows when the air bag gas is about to be exhausted. Figure 1 Schematic diagram of the status of the noise reduction structure and airbag; Figure 10 It is a schematic diagram showing the structure of a tracheal fluid disperser (6 tracheal valves); Figure 11 Yes Display Figure 10 Schematic diagram of the time shift of the noise reduction structure from the collapsed state to the expanded state and then to the collapsed state; Figure 12 When the display is full Figure 10 Schematic diagram of the status of the noise reduction structure and airbag; Figure 13 It is a structural schematic diagram showing the detachable connection between the ventilation pipe and the noise reduction structure; Figure 14 Yes Display Figure 13 Structural diagrams of other detachable forms; Figure 15 Is the time when the tracheal valves are unequal in length Figure 10 Structural diagram of the noise reduction structure; Figure 16 When showing different shapes of tracheal valves Figure 10 Schematic diagram of the noise reduction structure.

[0020] Explanation of the accompanying symbols: 1. Noise reduction structure; 11. Variable air flow dispersion part; 12. Tracheal fluid disperser; 13. Tracheal valve; 14. Multi-valve tracheal body; 18. Vent; 19. Air flow gap; 2. Airbag body; 21. Air bag; 3. Ventilation pipeline; 4. Air supply component; 5. Pipeline silencer; 51. Multi-porous structure; 6. Pneumatic system; 7. Control component. DETAILED DESCRIPTION

[0021] The following is combined with Figures 1-16 This application is described in further detail. Example 1

[0022] As mentioned in the background technology, in order to solve the problems in the prior art, the present application proposes a noise reduction structure of an airbag body, wherein: The airbag body 2 is configured as an air bag 21 capable of realizing pneumatic adjustment of the seat; a ventilation pipe 3 is inserted into the air bag 21, and air is blown into the air bag 21 through the air supply component 4 and the ventilation pipe 3; The noise reduction structure 1 is configured as a variable airflow dispersion portion 11, and the variable airflow dispersion portion 11 is connected to the end of the ventilation pipe 3 away from the air supply component 4; When the airbag 21 is inflated, the high-speed jet of air flows through the air supply assembly 4 and the ventilation pipe 3 and blows toward the variable airflow dispersion portion 11. Under the action of airflow dispersion, the variable airflow dispersion portion 11 gradually expands, and the airflow is dispersed and blown into the airbag 21. The airflow velocity decreases, thereby reducing the air popping sound generated when the airflow blows into the airbag 21, achieving noise reduction, and thus providing the occupant with a better massage comfort. When the air bag 21 is exhausted outward, the variable air flow dispersion portion 11 gradually presents or has already presented a retracted state, the air flow velocity decreases, the gas is slowly released, and the air flow in the air bag 21 will relatively slowly enter the ventilation pipe 3 and finally be discharged from the air bag 21.

[0023] In a preferred embodiment, the noise reduction structure 1 and the ventilation pipe 3 can be in a one-to-one correspondence, that is, a group of the ventilation pipes 3 corresponds to a group of the noise reduction structure 1; or a branch pipe can be set at the front end of the ventilation pipe 3, and the noise reduction structure 1 is synchronously configured at the front end of the branch pipe; for the air bag 21, the ventilation pipe 3 and the noise reduction structure 1 can be set in any level of air bag 21, or the ventilation pipe 3 and the noise reduction structure 1 can be set in a specified level of air bag 21. The specific setting needs to be set according to actual conditions.

[0024] In a preferred embodiment, the variable airflow dispersion portion 11 is configured as an air tube-type fluid disperser 12, which is formed by a flexible pipeline. The air tube-type fluid disperser 12 includes N air tube flaps 13 (N≥2) arranged along the end of the ventilation pipeline 3. The N air tube flaps 13 form an airflow gap 19 between each other. The N air tube flaps 13 are allowed to move relative to the ventilation pipeline 3 in a manner of gathering together or spreading apart (the accompanying drawings mainly provide schematic diagrams of four air tube flaps 13 and six air tube flaps 13), and the N air tube flaps 13 are completely extended into the air bag 21 to ensure that the N air tube flaps 13 can move in the above manner. It should be noted that regardless of whether the air bag 21 is inflated or deflated, the air tube-type fluid disperser 12 always remains in communication with the ventilation pipeline 3. When the air bag 21 is inflated, the air flow is blown toward the tracheal fluid disperser 12 through the ventilation pipe 3. The N tracheal valves 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. Since the air flow blowing range at the port is relatively larger, the air flow velocity will be weakened, and ultimately the air popping sound generated when the air flow is blown into the air bag 21 will be weakened, thereby achieving noise reduction. When the air bag 21 is exhausted outward, the N tracheal valves 13 are retracted, the air flow velocity is reduced, and the gas is slowly released. The air flow in the air bag 21 will relatively slowly enter the ventilation pipe 3 and eventually be discharged from the air bag 21.

[0025] In a preferred embodiment, the N tracheal flaps 13 can be configured as: a multi-flap tracheal body 14 formed by cutting along the diameter direction of the ventilation duct 3, that is, the N tracheal flaps 13 and the ventilation duct 3 are regarded as an integrally formed structure. The advantage of this setting method is that no additional components need to be added, and noise reduction can be achieved only by relying on improvements to the ventilation duct 3 itself. The design concept is very clever and the noise reduction effect is also good.

[0026] In a preferred embodiment, the N tracheal flaps 13 can be configured as follows: each of the tracheal flaps 13 is movably connected to the ventilation duct 3, that is, the N tracheal flaps 13 and the ventilation duct 3 are regarded as detachable connection structures, and the detachable connection methods include but are not limited to plugging or snapping. The advantage of this setting method is that the noise reduction structure 1 can be regarded as a separate component, which can be optionally installed at the end of the ventilation duct 3 in some way, and the flexibility during use is greatly increased.

[0027] In a preferred embodiment, the length of the N tracheal flaps 13 can be configured as follows: their length is greater than 1.5 times the outer diameter of the ventilation duct 3. The advantage of this arrangement is that when the air bag 21 is inflated, the N tracheal flaps 13 can have a better opening angle, a larger airflow range, and a better noise reduction effect.

[0028] In a preferred embodiment, the lengths of the N tracheal flaps 13 can be configured to be all equal in length, or can be configured to be not all equal in length, that is, the lengths of the tracheal flaps 13 can be flexibly configured.

[0029] In a preferred embodiment, the shapes of the N tracheal flaps 13 can be flexibly configured, such as rectangular, triangular or trapezoidal, but not limited thereto.

[0030] In a preferred embodiment, a plurality of vent holes 18 may be further provided on the N tracheal valves 13. When the air bag 21 is inflated, part of the air flow passing through the tracheal fluid disperser 12 may be dispersed outward along the vent holes 18 and blown into the air bag 21, thereby expanding the flow range of the air flow and further reducing the air burst sound.

[0031] Here, the noise reduction principle is further explained: Assume that the airflow pressure output from the air supply assembly 4 is P, the airflow pressure entering the ventilation pipe 3 is P1, and the airflow 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 a fluid flows from a high-pressure area to a low-pressure area, the increase in flow rate will cause the local pressure to decrease. This pressure difference can generate airflow. When the air flow passes through the narrow part of the ventilation pipe 3, the flow rate will increase, and the pressure at the outlet or downstream area will be restored. This pressure will produce air popping sound, so the pressure difference is one of the main factors causing air popping sound; when the air flow flows into the air bag 21 through the ventilation pipe 3, under the action of the noise reduction structure 1, the ventilation range of the air flow when entering the air bag 21 will be slowly expanded, so that the pressure P1 slowly becomes P2, the air flow rate is reduced, and thus the air popping sound is reduced.

[0032] In a preferred embodiment, a pipeline silencer 5 may be further provided in the ventilation pipeline 3. The pipeline silencer 5 is a porous structure 51 formed by densely distributed pores. The pipeline silencer 5 may be made of metal materials, including but not limited to copper, aluminum or stainless steel; or may be made of non-metallic materials, including but not limited to plastic or ceramics. When the air bag 21 is inflated, the air flow first blows toward the pipe silencer 5 through the ventilation pipe 3, and is preferentially dispersed and blown out from the end of the pipe silencer 5. At this time, the air flow velocity is partially weakened, and the air flow partially obstructed by the porous structure 51 will be dispersed and blown out from the periphery of the porous structure 51, and the air flow velocity is further weakened, thereby weakening the air popping sound generated when the air flow is ejected, achieving primary noise reduction. After the primary noise reduction, the air flow passes through the noise reduction structure 1 at the end of the ventilation pipe 3 to achieve secondary noise reduction, further weakening the air popping sound when the air flow is ejected. Example 2

[0033] Based on the above embodiments, the present application proposes a pneumatic system, which includes the noise reduction structure 1 described in the above embodiments. The noise reduction device can be set in a pneumatic system 6 such as a lumbar support, a leg support, a back massage, a shoulder massage, etc., but is not limited thereto. The pneumatic system 6 includes: Airbag 2, the gas component is configured to achieve pneumatic adjustment of the seat; an air supply component 4, the air supply component 4 being configured to deliver flowing gas into the airbag body 2; a control component 7, wherein the control component 7 is configured to control the flow gas to enter or exit the airbag 2; The ventilation pipeline 3 is placed between the air supply component 4 and the airbag body 2, and the noise reduction structure 1 is arranged at one end of the ventilation pipeline 3 away from the air supply component 4.

[0034] When the airbag 2 is inflated, the air supply component 4 provides the flowing gas, and the control component 7 conducts the flowing gas into the airbag 2 through the ventilation pipe 3, and reduces the air popping sound when the air is blown into the airbag 2 through the noise reduction structure 1 at the end of the ventilation pipe 3 to achieve noise reduction.

[0035] In the description of this application, it should be understood that the terms "vertical", "horizontal", etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as a limitation on the present invention.

[0036] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present invention, "plurality" means more than two, unless otherwise specifically defined.

[0037] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A noise reduction structure of an airbag, characterized in that: The noise reduction structure (1) is arranged in the airbag body (2), and the airbag body (2) is configured as an airbag (21) capable of realizing pneumatic adjustment of the seat; a ventilation pipeline (3) is inserted into the airbag (21), and air flows through the air supply component (4) and the ventilation pipeline (3) and blows into the airbag (21); The noise reduction structure (1) is configured as a variable airflow dispersion portion (11), and the variable airflow dispersion portion (11) is arranged in communication with an end of the ventilation pipeline (3) away from the air supply component (4); When the air bag (21) is inflated, the high-speed jetted air flow is blown toward the variable air flow dispersion portion (11) through the air supply component (4) and the ventilation pipeline (3); the variable air flow dispersion portion (11) gradually assumes an expanded state under the action of the air flow dispersion, and the air flow is dispersed and blown into the air bag (21); When the air bag (21) is exhausted outward, the variable air flow dispersion portion (11) gradually assumes or has assumed a retracted state, and the air flow in the air bag (21) relatively slowly enters the ventilation duct (3) and eventually exits the air bag (21).

2. The noise reduction structure according to claim 1, characterized in that: The variable airflow dispersion unit (11) is configured as an air pipe type fluid disperser (12), The tracheal fluid disperser (12) comprises N tracheal flaps (13) (N≥2) arranged along the port of the ventilation pipeline (3), and the N tracheal flaps (13) are allowed to move in a manner of gathering together or spreading apart relative to the ventilation pipeline (3). It should also be noted that no matter whether the air bag (21) is in an inflated state or a deflated state, the tracheal fluid disperser (12) always maintains communication with the ventilation pipeline (3); When the air bag (21) is inflated, the airflow is blown toward the tracheal fluid disperser (12) through the ventilation pipeline (3), and the N tracheal valves (13) are dispersed and opened under the action of the airflow, and the airflow is dispersed and blown into the air bag (21); When the air bag (21) is exhausted outward, the N tracheal valves (13) are retracted, the air flow rate is reduced and relatively slowly enters the ventilation pipeline (3), and finally exits the air bag (21).

3. The noise reduction structure according to claim 2, characterized in that: The N tracheal flaps (13) can be configured as: a multi-flap tracheal body (14) formed by cutting the ventilation pipeline (3) along its own tube diameter direction, that is, the N tracheal flaps (13) and the ventilation pipeline (3) are regarded as an integrally formed structure.

4. The noise reduction structure according to claim 2, characterized in that: The N tracheal flaps (13) can be configured as follows: each of the tracheal flaps (13) is movably connected to the ventilation tube (3), that is, the N tracheal flaps (13) and the ventilation tube (3) are regarded 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 valves (13) can be configured to be greater than 1.5 times the outer diameter of the ventilation tube (3).

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

7. The noise reduction structure according to claim 3 or 4, characterized in that: A plurality of vent holes (18) for expanding the airflow range may also be provided on the N tracheal valves (13).

8. The noise reduction structure according to claim 1, characterized in that: A pipeline silencer (5) may also be added to the ventilation pipeline (3). The pipeline silencer (5) is arranged between the air supply component (4) and the noise reduction structure (1). The pipeline silencer (5) is a porous structure (51) formed by the aggregation of densely distributed pores. When the air bag (21) is inflated, the air flow first blows toward the pipe silencer (5) through the ventilation pipe (3), and is preferentially dispersed and blown out from the end of the pipe silencer (5). At this time, the air flow velocity is partially weakened, and the air flow partially obstructed by the porous structure (51) is dispersed and blown out from the periphery of the porous structure (51), and the air flow velocity is further weakened, thereby weakening the air explosion sound generated when the air flow is ejected, thereby achieving primary noise reduction.

9. The noise reduction structure according to claim 8, characterized in that: The pipeline silencer (5) can be made of metal materials, including but not limited to copper, aluminum or stainless steel; it can also be made of non-metallic materials, including but not limited to plastic or ceramic.

10. A pneumatic system, characterized in that: Comprising the noise reduction structure according to any one of claims 1 to 9, the pneumatic system comprises: An airbag body (2), wherein the airbag body (2) is configured to achieve pneumatic adjustment of the seat; An air supply component (4), the air supply component (4) being configured to deliver flowing gas into the airbag body (2); A control component (7), wherein the control component (7) is configured to control the flow of gas to enter or exit the airbag (2); A ventilation pipeline (3), wherein the ventilation pipeline (3) is disposed between the air supply component (4) and the airbag body (2), and the noise reduction structure (1) is disposed at an end of the ventilation pipeline (3) away from the air supply component (4).

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