A muffler and airbag device

Abstract

The utility model discloses a muffler and air bag device, the muffler includes casing and sound attenuation piece, the casing has the chamber and with the air inlet and the air outlet of chamber intercommunication, sound attenuation piece is configured in the chamber to the gas noise reduction of passing through the chamber, the casing includes main part and fixed component, and the main part has the mounting groove, and fixed component is detachably configured in the main part through a connecting structure, wherein, the fixed component is configured as: when the fixed component is separated from the main part, allows the sound attenuation piece to take from the mounting groove and put, when the fixed component is assembled to the main part, the sound attenuation piece is limited in the mounting groove, and the scheme is relative to prior art, and the sound attenuation piece can play the gas noise reduction of passing through the chamber.

Description

Technical Field

[0001] This utility model relates to the field of automation, and in particular to a silencer and air bag device. Background Technology

[0002] Airbag devices are widely used in applications such as lumbar support and massage in seats. They use an air pump to inflate and deflate airbags placed on the seat back or seat to achieve dynamic support and massage effects. However, the air outlet of the airbag device extends directly into the airbag, and the high-speed airflow during inflation generates significant noise, seriously affecting the user experience.

[0003] Therefore, it is necessary to propose a new technical solution to overcome the shortcomings of existing technologies. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a silencer and air bag device that can reduce noise during the inflation and deflation of the air bag.

[0005] This utility model provides a silencer, including a housing and a silencer component. The housing has a chamber and an air inlet and an air outlet communicating with the chamber. The silencer component is disposed within the chamber to reduce noise of the gas passing through the chamber. The housing includes: The main body, which has a mounting slot; and A fixing component, which is detachably disposed on the main body by means of a connecting structure; The fixing component is configured as follows: When the fixing component is separated from the main body, the silencing component is allowed to be removed from the mounting slot; When the fixing component is assembled to the main body, it confines the sound-absorbing component within the mounting groove.

[0006] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0007] Optionally, the opening of the mounting groove is the air outlet or is positioned opposite to the air outlet.

[0008] Optionally, the fixing member has a channel, one end of which is a connection port and the other end is the air outlet; When the fixing component is assembled to the main body, the connection port is connected to the opening of the mounting groove.

[0009] Optionally, the main body has a first mounting surface located on the outer periphery of the opening of the mounting groove; The fixing component has a second mounting surface; When the fixing component is assembled to the main body, the first mounting surface and the second mounting surface are in contact.

[0010] Optionally, the housing further includes a positioning structure, the positioning structure including a positioning block and a positioning groove that cooperates with the positioning block; One of the positioning block and the positioning groove is disposed on the main body, and the other is disposed on the fixing component.

[0011] Optionally, the positioning block is disposed on the first mounting surface; A portion of the channel forms the positioning groove.

[0012] Optionally, the mounting groove has a first limiting surface facing the air outlet, and the fixing member has a second limiting surface facing the mounting groove; The first limiting surface and the second limiting surface cooperate with each other to confine the silencing component within the mounting groove.

[0013] Optionally, the chamber further includes a transition chamber, through which the air inlet communicates with the mounting slot; The effective flow area of ​​the transition chamber is greater than the effective flow area of ​​the air inlet; The effective flow area of ​​the air outlet is greater than the effective flow area of ​​the air inlet.

[0014] Optionally, the connection structure includes a locking block and a slot that engages with the locking block; One of the card block and the card slot is disposed on the main body, and the other is disposed on the fixing component; The fixing component is provided with a connecting ear, and the locking block or the locking slot is disposed on the connecting ear.

[0015] This application also provides an air bag device, including an air bag and a silencer connected to the air bag, wherein the silencer is any of the silencers described above.

[0016] This utility model discloses a silencer and air bag device. The silencer component can reduce noise of gas passing through the chamber. When the fixing component is separated from the main body, the silencer component can be directly removed and placed, facilitating the assembly of the silencer component with the housing and making it convenient for maintenance or replacement of the silencer component. When the fixing component is assembled to the main body, the fixing component and the mounting groove together form a limiting structure, which can constrain the position of the silencer component and prevent the silencer component from shifting due to airflow impact or vibration, ensuring the continuous and stable operation of the noise reduction function. Attached Figure Description

[0017] Figure 1A schematic diagram of the structure of a muffler according to an embodiment of this utility model; Figure 2 for Figure 1 A schematic diagram of another embodiment of the silencer; Figure 3 for Figure 1 A cross-sectional view of the middle silencer; Figure 4 for Figure 1 A cross-sectional view of the middle silencer; Figure 5 for Figure 1 A schematic diagram of the main structure; Figure 6 for Figure 1 A schematic diagram of the structure of the fixed component.

[0018] The annotations in the figure are explained as follows: 100. Silencer; 10. Shell; 11. Chamber; 12. Air outlet; 13. Air inlet; 14. Transition chamber; 20. Main body; 21. Mounting slot; 211. Opening; 22. First mounting surface; 23. First limiting surface; 30. Fixing component; 31. Channel; 311. Connection port; 32. Connecting lug; 33. Second mounting surface; 34. Second limiting surface; 40. Connecting structure; 41. Locking block; 42. Locking slot; 50. Positioning structure; 51. Positioning block; 52. Positioning groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] like Figures 1 to 6 As shown, this application provides a muffler 100, including a housing 10 and a muffler component. The housing 10 has a chamber 11 and an air inlet 13 and an air outlet 12 communicating with the chamber 11. The muffler component is disposed in the chamber 11 to reduce noise of the gas passing through the chamber 11. The housing 10 includes a main body 20 and a fixing member 30. The main body 20 has a mounting groove 21. The fixing member 30 is detachably disposed on the main body 20 by a connecting structure 40. The fixing member 30 is configured such that when the fixing member 30 is separated from the main body 20, the muffler component can be removed from the mounting groove 21; when the fixing member 30 is assembled to the main body 20, the muffler component is confined within the mounting groove 21.

[0023] The silencer can reduce noise of the gas passing through the chamber 11. When the fixing component 30 is separated from the main body 20, the silencer can be directly removed and placed, which facilitates the assembly between the silencer and the housing 10 and makes it convenient for the silencer to be inspected or replaced. When the fixing component 30 is assembled to the main body 20, the fixing component 30 and the mounting groove 21 together form a limiting structure, which can constrain the position of the silencer and prevent the silencer from shifting due to airflow impact or vibration, thus ensuring the continuous and stable performance of the noise reduction function.

[0024] In this embodiment, as Figures 1 to 6 As shown, the structure of the housing 10 is not strictly limited, as long as the housing 10 can form a chamber 11, an air inlet 13, and an air outlet 12. The air inlet 13 and the air outlet 12 are located on opposite sides of the housing 10, and the mounting groove 21 is part of the chamber 11. The air inlet 13 is located in the main body 20; the opening 211 of the mounting groove 21 is the air outlet 12 or is arranged opposite to the air outlet 12.

[0025] In this embodiment, as Figures 1 to 6As shown, the shapes of the air inlet 13, the opening 211 of the mounting groove 21, and the air outlet 12 are not strictly limited; for example, the opening 211 of the mounting groove 21 and the air outlet 12 are both strip-shaped, while the air inlet 13 is circular. The effective flow area of ​​the air outlet 12 is larger than that of the air inlet 13, which reduces the airflow speed when the gas flows from the air inlet 13 to the air outlet 12, thereby further reducing noise generation. The effective flow area of ​​the air inlet 13 is S1, and the effective flow area of ​​the air outlet 12 is S2, satisfying S1:S2=1:(2-30). The effective flow area of ​​the opening 211 of the mounting groove 21 is approximately the same as that of the air outlet 12.

[0026] In this embodiment, as Figures 3 to 4 As shown, the chamber 11 further includes a transition chamber 14, through which the air inlet 13 communicates with the mounting groove 21. This allows the gas entering from the air inlet 13 to first enter the transition chamber 14, and then pass through the silencer in the mounting groove 21. The effective flow area of ​​the transition chamber 14 is larger than that of the air inlet 13, thus reducing the airflow speed as the gas flows from the air inlet 13 to the transition chamber 14, thereby further reducing noise generation. The transition chamber 14 is located in the main body 20; the effective flow area of ​​the transition chamber 14 gradually increases from the air inlet 13 to the air outlet 12. Specifically, the effective flow area of ​​the end of the transition chamber 14 facing the mounting groove 21 is approximately the same as the effective flow area of ​​the opening 211 of the mounting groove 21.

[0027] In this embodiment, as Figures 1 to 6 As shown, the fixing member 30 is generally arranged in a ring shape; the middle area of ​​the fixing member 30 corresponds to the outlet of the mounting groove 21. The fixing member 30 has a channel 31, one end of which is a connection port 311 and the other end is the air outlet 12; when the fixing member 30 is assembled to the main body 20, the connection port 311 is connected to the opening 211 of the mounting groove 21.

[0028] In this embodiment, as Figures 1 to 6 As shown, the main body 20 has a first mounting surface 22, which is located on the outer periphery of the opening 211 of the mounting groove 21; the fixing member 30 has a second mounting surface 33; when the fixing member 30 is assembled to the main body 20, the first mounting surface 22 and the second mounting surface 33 are in contact. After the first mounting surface 22 and the second mounting surface 33 are in contact, the main body 20 and the fixing member 30 form a closed sealing structure on the outer periphery of the opening 211 of the mounting groove 21, effectively preventing the possibility of gas leakage from the joint between the main body 20 and the fixing member 30, avoiding additional noise caused by air leakage, and ensuring that all airflow is filtered by the silencer before being discharged, thus improving noise reduction efficiency.

[0029] In this embodiment, as Figures 1 to 3 as well as Figures 5 to 6 As shown, the first mounting surface 22 is located on the side of the main body 20 facing away from the air inlet 13; there are two first mounting surfaces 22, which are located on both sides of the opening 211 of the mounting groove 21; there are also two corresponding second mounting surfaces 33, which are respectively attached to the corresponding first mounting surfaces 22.

[0030] In this embodiment, as Figures 4 to 6 As shown, the housing 10 also includes a positioning structure 50, which includes a positioning block 51 and a positioning groove 52 that cooperates with the positioning block 51. One of the positioning block 51 and the positioning groove 52 is disposed on the main body 20, and the other is disposed on the fixing member 30. The positioning block 51 and the positioning groove 52 play a guiding role during the assembly of the fixing member 30 and the main body 20, which can quickly guide the fixing member 30 to move along a predetermined path and avoid installation misalignment caused by human operation error.

[0031] In this embodiment, as Figures 4 to 6 As shown, the positioning block 51 is disposed between the two first mounting surfaces 22; a portion of the channel 31 forms the positioning groove 52. Using a portion of the channel 31 of the fixing member 30 to form the positioning groove 52 avoids complicating the structure of the housing 10 and facilitates the miniaturization design of the muffler 100. There are two positioning blocks 51; when the two positioning blocks 51 extend into the channel 31, the first mounting surface 22 and the second mounting surface 33 are located on both sides of the two positioning blocks 51.

[0032] In this embodiment, as Figures 3 to 6 As shown, the mounting groove 21 has a first limiting surface 23 facing the air outlet 12, and the fixing member 30 has a second limiting surface 34 facing the mounting groove 21. The first limiting surface 23 and the second limiting surface 34 cooperate with each other to confine the muffler within the mounting groove 21. When the muffler may be subjected to airflow impact or mechanical vibration within the mounting groove 21, the first limiting surface 23 and the second limiting surface 34 form a bidirectional clamping effect on the muffler through surface contact, which can effectively resist the displacement of the muffler.

[0033] In this embodiment, as Figures 3 to 6 As shown, there are two first limiting surfaces 23, located on opposite sides of the chamber 11 and abutting against the side of the muffler facing the air inlet 13; there are also two second limiting surfaces 34, located on opposite sides of the chamber 11 and abutting against the side of the muffler facing the air outlet 12. The second limiting surfaces 34 are coplanar with the second mounting surfaces 33.

[0034] In this embodiment, as Figures 1 to 6 As shown, the connecting structure 40 includes a locking block 41 and a locking groove 42 that engages with the locking block 41; one of the locking block 41 and the locking groove 42 is disposed on the main body 20, and the other is disposed on the fixing member 30; wherein, the fixing member 30 is provided with a connecting ear 32, and the locking block 41 or the locking groove is disposed on the connecting ear 32. The operator only needs to press the fixing member 30 against the main body 20, and the deformation of the connecting ear 32 will cause the locking block 41 located on the connecting ear 32 to pass over the side wall of the main body 20, or the connecting ear 32 to pass over the locking block 41 on the main body 20, so as to engage the locking block 41 in the locking groove 42.

[0035] In this embodiment, as Figures 1 to 6 As shown, there are two locking blocks 41 and two locking slots 42; the two locking blocks 41 are respectively engaged with the corresponding locking slots 42. The two locking blocks 41 are located on both sides of the main body 20; there are two connecting ears 32, and the two locking slots 42 are respectively opened on the corresponding connecting ears 32. When the fixing component 30 is assembled onto the main body 20, the two connecting ears 32 are located on both sides of the main body 20 and fit against the main body 20.

[0036] In this embodiment, the structure of the silencing component is not strictly limited; for example, the silencing component is sound-absorbing cotton. The silencing component is arranged in a strip shape; the outer walls of the silencing component are all in contact with the inner wall of the mounting groove 21 to prevent gas from flowing out between the silencing component and the inner wall of the mounting groove 21, so as to ensure that the gas passes through the silencing component.

[0037] In this embodiment, the muffler can employ existing technology; for example, the muffler has microporous air channels that allow gas flow, and the muffler is located between the air inlet 13 and the air outlet 12. Gas entering from the air inlet 13 is slowed down by the microporous air channels of the muffler before flowing out from the air outlet 12; or, gas entering from the air outlet 12 is slowed down by the microporous air channels of the muffler before flowing out from the air inlet 13.

[0038] In this embodiment, the microporous airway has an inlet and an outlet that are respectively connected to the inlet 13 and the outlet 12. The middle connecting section between the inlet and outlet of the microporous airway can be an airway structure of any shape, allowing gas flow between the inlet 13 and the outlet 12. The airway structure can be a straight airway or a series of curved connecting airways. There can be multiple airway structures, which can be independent of each other or interconnected.

[0039] like Figures 1 to 6As shown, this embodiment of the invention also provides an air bag device, including an air bag and a silencer 100 connected to the air bag. The silencer 100 is the same as the silencer 100 in the above embodiments. When the air bag is inflated or deflated, the gas passes through the silencer 100, eliminating the noise generated by the airflow.

[0040] The air bag has an inflation space, and the outlet 12 of the silencer 100 is connected to the inflation space. The air bag device also includes an air pipe, which is connected to the inlet 13 of the silencer 100. When the air bag is inflated, the gas flows through the air pipe to the inlet 13 of the silencer 100, and then passes through the microporous air channel on the silencer component in the chamber 11. After being slowed down and silenced by the microporous air channel, the gas is discharged from the outlet 12 of the silencer 100 and enters the inflation space of the air bag, causing the air bag to inflate.

[0041] When the air bag is deflated, the gas in the air bag's inflation space enters the chamber 11 from the air outlet 12 of the silencer 100, flows through the microporous air channel on the silencer, slows down and reduces noise through the microporous air channel, and then flows into the air pipe from the air inlet 13 of the silencer 100 and is then discharged.

[0042] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0043] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A silencer, comprising a housing and a silencer component, the housing having a chamber and an air inlet and an air outlet communicating with the chamber, the silencer component being disposed within the chamber to reduce noise of gas passing through the chamber; characterized in that, The housing includes: The main body, which has a mounting slot; and A fixing component, which is detachably disposed on the main body by means of a connecting structure; The fixing component is configured as follows: When the fixing component is separated from the main body, the silencing component is allowed to be removed from the mounting slot; When the fixing component is assembled to the main body, it confines the sound-absorbing component within the mounting groove.

2. A silencer according to claim 1, characterized in that, The opening of the mounting slot is the air outlet or is positioned opposite to the air outlet.

3. A silencer according to claim 1 or 2, characterized in that, The fixing component has a channel, one end of which is a connection port and the other end is the air outlet; When the fixing component is assembled to the main body, the connection port is connected to the opening of the mounting groove.

4. A silencer according to claim 3, characterized in that, The main body has a first mounting surface, which is located on the outer periphery of the opening of the mounting groove; The fixing component has a second mounting surface; When the fixing component is assembled to the main body, the first mounting surface and the second mounting surface are in contact.

5. A silencer according to claim 4, characterized in that, The housing also includes a positioning structure, which includes a positioning block and a positioning groove that cooperates with the positioning block; One of the positioning block and the positioning groove is disposed on the main body, and the other is disposed on the fixing component.

6. A silencer according to claim 5, characterized in that, The positioning block is disposed on the first mounting surface; A portion of the channel forms the positioning groove.

7. A silencer according to claim 1 or 2, characterized in that, The mounting groove has a first limiting surface facing the air outlet, and the fixing member has a second limiting surface facing the mounting groove; The first limiting surface and the second limiting surface cooperate with each other to confine the silencing component within the mounting groove.

8. A silencer according to claim 1 or 2, characterized in that, The chamber further includes a transition chamber, through which the air inlet communicates with the mounting slot; The effective flow area of ​​the transition chamber is greater than the effective flow area of ​​the air inlet; The effective flow area of ​​the air outlet is greater than the effective flow area of ​​the air inlet.

9. A silencer according to claim 1, characterized in that, The connection structure includes a card block and a card slot that engages with the card block; One of the card block and the card slot is disposed on the main body, and the other is disposed on the fixing component; The fixing component is provided with a connecting ear, and the locking block or the locking slot is disposed on the connecting ear.

10. An airbag device, comprising an airbag and a silencer connected to the airbag, characterized in that, The muffler is the muffler according to any one of claims 1-9.

Images