Mute pneumatic control structure and bedding

Abstract

The utility model discloses a mute air control structure and bedding, belongs to the technical field of air bag inflation and deflation, and solves the problems that structures such as a sound insulation pad and the like are often arranged above an inflation and deflation structure based on an air pump in an ordinary intelligent mattress and an intelligent pillow to absorb sound, so that noise generated by flowing air guided by the air pump is reduced, and the air inflation and deflation effect is poor. In this way, the thickness of bedding such as intelligent mattresses and intelligent pillows is forcibly increased. The air pump is arranged in one end of the mounting base in a suspended mode, the first-stage speed reduction and noise reduction assembly and the second-stage speed reduction and noise reduction assembly are arranged in the mounting base and communicate with the air pump in sequence, and the opening and closing assembly is arranged at the other end of the mounting base. According to the air pump, the first-stage speed reduction and noise reduction assembly and the second-stage speed reduction and noise reduction assembly are used for blocking or disturbing air flow in the air flowing process so as to reduce the air flow speed actuated by the air pump, sound waves generated in the air flowing process are absorbed, and then abnormal sound caused by air flowing in the inflation and deflation process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of airbag inflation and deflation, and in particular to a silent air control structure and bedding. Background Art

[0002] The application of airbags in smart mattresses and smart pillows is to provide customized support and comfort. In smart mattresses, airbags can adjust the hardness and support of the mattress by inflating and deflating to adapt to the body shape and sleeping position of different users. For example, when the system detects that the user turns over or the weight distribution changes, the airbags will automatically adjust to maintain the best sleeping position and reduce pressure points, thereby improving sleep quality. In addition, the airbags of some smart mattresses can also simulate massage effects, providing users with a relaxing experience through periodic inflation and deflation. The airbags in smart pillows are mainly used for neck support and sleeping position adjustment. The airbags can be adaptively adjusted according to the contours of the user's head and neck, providing appropriate support to help relieve neck muscle tension and pressure. For different sleeping positions such as side-lying, supine or prone, smart pillows can adapt through the adjustment of airbags to reduce the burden on the cervical spine. Some smart pillows also have a vibration massage function, and the vibration of the airbag can help users relax and fall asleep faster. Through intelligent control, the airbag can also adjust the height of the pillow when the user snores, encouraging users to change their sleeping positions, thereby reducing the occurrence of snoring. The airbag system in smart mattresses and pillows greatly improves the comfort and health of sleep through precise adjustment and intelligent management.

[0003] The height, hardness and fluctuation frequency of the airbag are all controlled by an air pump-based inflation and deflation structure. The air pressure fed back in the airbag and the pressure under the airbag are used as parameters to adjust the inflation and deflation action and the inflation and deflation volume of the air pump-based inflation and deflation structure. However, in the process of inflation and deflation of the air pump, the air pump guides the outside air to form a fast-flowing airflow in the pipeline. When the airflow flows fast, it will make obvious noise due to various factors. In order to reduce the impression of the noise, ordinary smart mattresses and smart pillows often have sound insulation pads and other structures above the air pump-based inflation and deflation structure to absorb sound, so as to reduce the noise generated by the flowing air guided by the air pump. However, this may cause the thickness of bedding such as smart mattresses and smart pillows to be forced to increase.

[0004] Therefore, a silent air control structure and bedding are proposed to solve or alleviate the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings of the prior art and proposes a silent air control structure and bedding.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A silent air control structure comprises a mounting seat, an air pump suspended in one end of the mounting seat, a primary deceleration and noise reduction component and a secondary deceleration and noise reduction component arranged in the mounting seat and connected with the air pump in sequence, and an opening and closing component arranged at the other end of the mounting seat, one end of the opening and closing component is connected with the secondary deceleration and noise reduction component, and the other end of the opening and closing component is connected with an inlet and outlet air pipe, and the inlet and outlet air pipe is used for inflating and deflating the air bag.

[0008] Optionally, the first-stage deceleration and noise reduction component includes a hollow air shell and a soft block filled in the air shell;

[0009] The air housing is connected to the air pump via connecting air pipe 1;

[0010] The soft block has elastic deformation performance and is in a porous structure.

[0011] Optionally, the soft block may be one or more of a sponge block, cotton wool, and polyurethane foam.

[0012] Optionally, the secondary deceleration and noise reduction assembly includes a small three-layer airbag;

[0013] The small three-layer airbag is connected to the first-level deceleration and noise reduction component through the second connecting air pipe.

[0014] Optionally, the small three-layer airbag includes three airbags that are interconnected, and the cross-sectional area of ​​the connecting portion of the three airbags is less than half of the cross-sectional area of ​​the airbag.

[0015] Optionally, the opening and closing assembly includes a solenoid valve 1 and a solenoid valve 2;

[0016] The solenoid valve 1 is connected to the secondary deceleration and noise reduction component through the connecting air pipe 3, and the solenoid valve 1 is connected to the solenoid valve 2 through the connecting air pipe 4.

[0017] Optionally, the inlet and outlet air pipes include inlet and outlet air pipe 1 and inlet and outlet air pipe 2;

[0018] The inlet and outlet air pipe 1 is connected to the connecting air pipe 4 between the solenoid valve 1 and the solenoid valve 2, and the inlet and outlet air pipe 2 is connected to the solenoid valve 2.

[0019] Optionally, it also includes a controller circuit board disposed in the mounting seat;

[0020] A microcontrol unit and an air pressure sensor coupled to the microcontrol unit are provided on the controller circuit board; the connecting air pipe four located between the solenoid valve one and the inlet and outlet air pipe one is connected to an air pressure pipe, and one end of the air pressure pipe away from the connecting air pipe four is connected to the detection end of the air pressure sensor.

[0021] Optionally, it also includes a housing and an end cap;

[0022] The shell is a hollow structure with at least one opening, the mounting seat is detachably connected to the hollow structure of the shell, and the end cover is detachably connected to the shell to close the opening of the shell, and the inlet and outlet air pipes are arranged through the end cover.

[0023] The utility model provides a bedding, comprising an air bag and any one of the above-mentioned silent air control structures, wherein the air bag is connected to the silent air control structure.

[0024] The utility model has the following beneficial effects:

[0025] This utility model patent designs a silent air control structure, which includes one-stage and two-stage deceleration and noise reduction components, aiming to effectively control the fast airflow in the pipeline guided by the air pump. The function of the first-stage deceleration and noise reduction component is to initially slow down the airflow speed, while the second stage further reduces the airflow speed. Through this graded deceleration method, the noise generated when the airflow flows in the pipeline is significantly reduced. In addition, the one-stage and two-stage deceleration and noise reduction components not only slow down the airflow, but also have sound absorption functions, which can absorb the already reduced noise and further prevent the noise from propagating outward, thereby effectively controlling the spread of noise at the source.

[0026] Due to the slowdown in air flow rate, this structure facilitates precise inflation and deflation control of the airbag, so as to achieve silent and slow inflation and deflation of the airbag. This design avoids the risk of damage to the airbag due to instantaneous filling of excessive air, ensuring the stable operation of the system and the safe use of the airbag. Controlling the inflation of the airbag through this innovative structure not only improves the service life of the airbag, but also provides users with a quieter and more comfortable use environment.

[0027] Overall, the utility model comprehensively regulates the airflow in the air pump system through the designed speed reduction and noise reduction components and silent air control structure, which not only reduces the noise but also improves the safety and reliability of the system. This design not only ensures the efficient operation of the air pump system, but also provides an effective technical solution for reducing noise pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1A schematic diagram of the structure of the silent air control structure provided by the utility model;

[0030] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0031] Figure 3 This is a schematic diagram of the structure of the silent air control structure provided by the utility model after removing the outer shell;

[0032] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0033] Figure 5 for Figure 3 Enlarged view of point C in the middle.

[0034] 10-housing; 101-wire slot; 102-embedded slot; 11-end cover; 12-mounting seat; 121-support arc plate; 1211-hook slot; 122-embedded block; 131-air pump; 132-support seat; 133-connecting hook; 134-buffer ring; 141-spring; 142-connecting ring; 15-connecting air pipe one; 16-air shell; 17-small three-layer air bag; 181-connecting air pipe three; 182-air pressure pipe; 183-connecting air pipe four; 184-inlet and outlet air pipe one; 185-inlet and outlet air pipe two; 191-solenoid valve one; 192-solenoid valve two; 20-controller circuit board. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present utility model, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present utility model.

[0039] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] A silent air-controlled structure and bedding, such as Figure 1 , Figure 3 and Figure 4 As shown, it includes a mounting base 12, an air pump 131 suspended in one end of the mounting base 12, a first-stage deceleration and noise reduction component and a second-stage deceleration and noise reduction component arranged in the mounting base 12 and connected with the air pump 131 in sequence, and an opening and closing component arranged at the other end of the mounting base 12, one end of the opening and closing component is connected with the second-stage deceleration and noise reduction component, and the other end of the opening and closing component is connected with an inlet and outlet air pipe, and the inlet and outlet air pipe is used for inflating and deflation of the airbag.

[0042] The mounting seat 12 is a long strip structure, which mainly serves to carry the air pump 131, the first-stage deceleration and noise reduction component, the second-stage deceleration and noise reduction component, and the opening and closing component. The specific cross-sectional shape is not limited, and it only needs to maintain the above functions. It can also be as Figure 3 As shown, it has a semicircular tubular structure.

[0043] The first-stage deceleration and noise reduction component and the second-stage deceleration and noise reduction component are mainly connected to the air pump 131 to decelerate the high-speed air output by the air pump 131, thereby reducing the noise that may be emitted during the air flow by deceleration, and absorbing and eliminating the sound waves generated by the air flow during the deceleration process, and then further absorbing the weakened sound to prevent the sound waves from being transmitted to the outside.

[0044] The opening and closing component cooperates with the inlet and outlet air pipes to inflate and deflate the airbag. When there are multiple inlet and outlet air pipes, the opening and closing component can control the multiple inlet and outlet air pipes to remain unobstructed or partially unobstructed at the same time.

[0045] Secondly, if Figure 3 and Figure 4 As shown, one end of the mounting seat 12 is integrally formed with an arc-shaped supporting arc plate 121, and both ends of the supporting arc plate 121 are provided with hook grooves 1211 with L-shaped cross-sections. The outer side of the air pump 131 is provided with a supporting seat 132 that supports it, and the end of the support seat 132 is integrally formed with a connecting hook 133. A spring 141 is arranged between the support seat 132 and the supporting arc plate 121, and both ends of the spring 141 are fixedly connected with connecting rings 142, and the connecting rings 142 at both ends are respectively embedded in the hook groove 1211 and the connecting hook 133, and the openings of the hook groove 1211 and the connecting hook 133 can be closed by colloids such as hot melt adhesive to prevent the connecting ring 142 of the spring 141 from detaching therefrom and causing the air pump 131 to fall off.

[0046] Optionally, a buffer ring 134 is sleeved on the outer side of the air pump 131 .

[0047] The buffer ring 134 is an annular structure, and a flexible buffer material such as sponge can be used to prevent the air pump 131 from colliding with the supporting arc plate 121 and other structures. That is, the buffer ring 134 can be any flexible buffer block such as a sponge ring, a rubber ring, a soft foam plastic ring, an air cushion film, a latex block, etc., which is not specifically limited here.

[0048] Optionally, the first-stage deceleration and noise reduction component includes a hollow air shell 16 and a soft block filled in the air shell 16;

[0049] The air housing 16 is connected to the air pump 131 through the connecting air pipe 15;

[0050] The soft block has elastic deformation performance and has a porous structure.

[0051] The air shell 16 accommodates the soft block with a porous structure, and the high-speed air output by the air pump 131 is guided into the air shell 16 through the air pipe 15. Figure 3As shown, it can be cylindrical, and the soft block filled therein is adapted to the same structural shape. When the fast-flowing air enters the air shell 16 through the connecting air pipe 15, since the cross-sectional area of ​​the air shell 16 is much larger than the cross-sectional area of ​​the connecting air pipe 15, the air will be decelerated for a while, and then the air will hit the soft block. The elastic deformation performance of the soft block can carry the mechanical potential energy contained in the fast-flowing air and consume part of the potential energy in the process of deformation and recovery. The air then penetrates through the porous structure of the soft block and then leaves. In this process, the soft block causes obvious obstruction to the circulation of air, and the sound waves emitted during the air circulation process can be transmitted to the soft block, which undergoes elastic deformation and eliminates the sound waves during the elastic deformation process, thereby achieving a more obvious deceleration and noise reduction treatment for the air, reducing the noise problem caused by the air flow rate.

[0052] Optionally, the soft block may be one or more of a sponge block, cotton wool, and polyurethane foam.

[0053] The soft block in this solution provides one or more examples of sponge block, cotton wool, polyurethane foam, but is not limited to the above materials. Other materials that have both air permeability and elastic deformation properties can also achieve the required action and effect of the elastic block, and slow down and reduce the noise of the air trying to penetrate the air shell 16.

[0054] Alternatively, if Figure 3 As shown, the secondary deceleration and noise reduction assembly includes a small three-layer airbag 17;

[0055] The small three-layer airbag 17 is connected to the first-level deceleration and noise reduction component through the connecting air pipe 2.

[0056] The small three-layer airbag 17 is set as a secondary deceleration and noise reduction component. It can provide a space sufficient for buffering the air since the first-level deceleration and noise reduction component, and the space can be increased according to the amount of air. When air flows into it, the air needs to fill the space before leaving. The subsequent new air that enters can collide with the previous air to form a turbulent flow, thereby further reducing the air flow rate.

[0057] Optionally, the small three-layer airbag 17 includes three airbags that are interconnected, and the cross-sectional area of ​​the connecting portion of the three airbags is less than half of the cross-sectional area of ​​the airbag.

[0058] The three interconnected airbags are connected by holes with a cross-sectional area smaller than half of the cross-sectional area of ​​the airbags, and the three airbags are compounded together. When the air enters them, the air will enter the three airbags step by step, and when each airbag is inflated, it can have the effect of disturbing and slowing down the air.

[0059] Alternatively, if Figure 1 and Figure 2 As shown, the opening and closing assembly includes a solenoid valve 191 and a solenoid valve 2 192;

[0060] Solenoid valve one 191 is connected to the secondary deceleration and noise reduction component through connecting air pipe three 181, and solenoid valve one 191 is connected to solenoid valve two 192 through connecting air pipe four 183.

[0061] Optionally, the inlet and outlet pipes include an inlet and outlet pipe 1 184 and an inlet and outlet pipe 2 185;

[0062] The air inlet and outlet pipe 1 184 is connected to the connecting air pipe 4 183 between the solenoid valve 1 191 and the solenoid valve 2 192 , and the air inlet and outlet pipe 2 185 is connected to the solenoid valve 2 192 .

[0063] like Figure 2 and 5 As shown, solenoid valve 1 191 and solenoid valve 2 192 respectively control the on-off of different inlet and outlet air pipes. If only a single inlet and outlet air pipe needs to be turned on during the inflation and deflation process, then solenoid valve 2 192 should be closed, and only solenoid valve 1 191 should be kept unobstructed. If both inlet and outlet air pipe 1 184 and inlet and outlet air pipe 2 185 need to be kept unobstructed, then solenoid valve 1 191 and solenoid valve 2 192 should be opened at the same time, so that the passage connecting air pipe 3 181, solenoid valve 1 191, and air pipe 4 183 can be kept unobstructed. In this way, inlet and outlet air pipe 1 184 and inlet and outlet air pipe 2 185 can also maintain the corresponding unobstructed state to carry out the inflation and deflation of the airbag.

[0064] Optionally, it also includes a controller circuit board 20 disposed in the mounting seat 12;

[0065] A microcontrol unit and an air pressure sensor coupled to the microcontrol unit are provided on the controller circuit board 20. A connecting air pipe 183 located between the solenoid valve 191 and the inlet and outlet air pipe 184 is connected to a pressure pipe 182. An end of the pressure pipe 182 away from the connecting air pipe 183 is connected to a detection end of the pressure sensor. The microcontrol unit is also coupled to the air pump 131.

[0066] The microcontroller unit is MCU. Since MCU integrates processor, memory, input / output interface, etc., it is very suitable for small and simple control systems. Therefore, when it is coupled with the air pressure sensor, it can control the air pump 131 to inflate or exhaust air according to the air pressure signal fed back by the air pressure sensor.

[0067] It should be noted that the MCU controls the air pump 131 according to the air pressure signal fed back by the air pressure sensor, and no technical improvement is made, nor does it involve any program changes to the MCU. This is existing technology and will not be elaborated here.

[0068] Alternatively, if Figure 1 As shown, it also includes a housing 10 and an end cover 11;

[0069] The housing 10 is a hollow structure with at least one opening. The mounting seat 12 is detachably connected to the hollow structure of the housing 10 , and the end cover 11 is detachably connected to the housing 10 to close the opening of the housing 10 . The inlet and outlet air pipes pass through the end cover 11 .

[0070] The housing 10 is a hollow structure having at least one opening. Figure 1 and 2 As shown, it is in the shape of a circular tube and can be adapted to a mounting base 12 in the shape of a semicircular tube. A wire groove 101 connected to the interior of the shell 10 is provided at one end thereof, so that the line connected to the MCU can pass therethrough to leave, thereby facilitating the wiring operation. In addition, an embedding groove 102 is also provided on the outer peripheral wall of the shell 10 at the same end. Matching therewith, an embedding block 122 that can be embedded in the embedding groove 102 is integrally formed at one end of the mounting base 12. When the shell 10 is sleeved on the outside of the mounting base 12 to provide protection for the structure therein, the mounting base 12 can be connected to the shell 10 through the embedding block 122 and the embedding groove 102. After the inlet and outlet pipe 1 184 and the inlet and outlet pipe 2 185 pass through the end cover 11, the end cover 11 is used to close the opening at one end of the shell 10 to protect its internal structure and prevent external debris from entering therein.

[0071] The utility model provides a bedding, comprising an air bag and any one of the above-mentioned silent air control structures, wherein the air bag is connected to the silent air control structure.

[0072] The utility model provides a silent air-controlled structure and bedding, which slow down or hinder or disturb the air flowing rapidly in the pipeline under the guidance of the air pump 131 through a first-stage deceleration and noise reduction component and a second-stage deceleration and noise reduction component, thereby reducing the noise in the air flow process, and the noise emitted and reduced in the process can be absorbed by the first and second-stage deceleration and noise reduction components, further reducing the possibility of noise propagation outward, and the silent air-controlled structure can realize silent and slow inflation and deflation of the airbag, and also avoid the situation where the airbag receives excessive air instantly and is damaged.

[0073] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A silent air control structure, characterized in that: The invention comprises a mounting seat (12), an air pump (131) suspended in one end of the mounting seat (12), a primary deceleration and noise reduction component and a secondary deceleration and noise reduction component which are arranged in the mounting seat (12) and are connected to the air pump (131) in sequence, and an opening and closing component which is arranged at the other end of the mounting seat (12), wherein one end of the opening and closing component is connected to the secondary deceleration and noise reduction component, and the other end of the opening and closing component is connected to an inlet and outlet air pipe, and the inlet and outlet air pipe is used for inflating and deflation of the air bag.

2. A silent air control structure according to claim 1, characterized in that: The first-stage deceleration and noise reduction component comprises a hollow air shell (16) and a soft block filled in the air shell (16); The air housing (16) is connected to the air pump (131) via the connecting air pipe 1 (15); The soft block has elastic deformation performance and is in a porous structure.

3. A silent air control structure according to claim 2, characterized in that: The soft block can be one or more of a sponge block, cotton wool, and polyurethane foam.

4. A silent air control structure according to claim 1, characterized in that: The secondary deceleration and noise reduction component comprises a small three-layer airbag (17); The small three-layer airbag (17) is connected to the first-level deceleration and noise reduction component through the second connecting air pipe.

5. A silent air control structure according to claim 4, characterized in that: The small three-layer airbag (17) comprises three airbags that are interconnected, and the cross-sectional area of ​​the connecting portion of the three airbags is less than half of the cross-sectional area of ​​the airbag.

6. The silent air control structure according to claim 1, characterized in that: The opening and closing assembly comprises a solenoid valve 1 (191) and a solenoid valve 2 (192); The solenoid valve one (191) is connected to the secondary speed reduction and noise reduction component through the connecting air pipe three (181), and the solenoid valve one (191) is connected to the solenoid valve two (192) through the connecting air pipe four (183).

7. A silent air control structure according to claim 6, characterized in that: The inlet and outlet air pipes include an inlet and outlet air pipe 1 (184) and an inlet and outlet air pipe 2 (185); The inlet and outlet air pipe 1 (184) is connected to the connecting air pipe 4 (183) between the electromagnetic valve 1 (191) and the electromagnetic valve 2 (192), and the inlet and outlet air pipe 2 (185) is connected to the electromagnetic valve 2 (192).

8. A silent air control structure according to claim 7, characterized in that: Also included is a controller circuit board (20) disposed in the mounting seat (12); The controller circuit board (20) is provided with a microcontroller unit and an air pressure sensor coupled to the microcontroller unit; the connecting air pipe four (183) located between the solenoid valve one (191) and the air inlet and outlet pipe one (184) is connected to an air pressure pipe (182); and one end of the air pressure pipe (182) away from the connecting air pipe four (183) is connected to a detection end of the air pressure sensor.

9. The silent air control structure according to claim 1, characterized in that: It also includes a housing (10) and an end cover (11); The outer shell (10) is a hollow structure having at least one opening, the mounting seat (12) is detachably connected to the hollow structure of the outer shell (10), and the end cover (11) is detachably connected to the outer shell (10) to close the opening of the outer shell (10), and the air inlet and outlet pipes are arranged to pass through the end cover (11).

10. A bedding, characterized in that: It comprises an airbag and the silent air-controlled structure according to any one of claims 1 to 9, wherein the airbag is connected to the silent air-controlled structure.

Images