Silencer, seal plate, and fender liner

Abstract

To develop a novel demanded silencer.SOLUTION: An aspect of the invention pertains to a silencer including: a housing including a large room and a plurality of small rooms in a state connected with a plurality of ventilation passages extending from the large room, and openings that open in the same direction, formed in respective one surfaces of the large room and the plurality of small rooms; and a plurality of vibration membrane parts fixed to opening edges of the respective openings to close the openings. In the housing, inflow and outflow of gas inside / outside the housing is restricted, and sound is reduced by vibrations of the plurality of vibration membrane parts.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a muffler, a seal plate having the same, and a fender liner.

Background Art

[0002] Conventionally, various mufflers have been proposed (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

[0027] to

[0040] , FIGS. 1 to 5, etc.)

Summary of the Invention

Problems to be Solved by the Invention

[0004] Development of a new muffler is required.

Means for Solving the Problems

[0005] One aspect of the invention includes a housing having a large room and a plurality of small rooms connected by a plurality of ventilation paths extending from the large room, and openings facing the same direction are formed on each one surface of the large room and the plurality of small rooms, and a plurality of diaphragm portions fixed to the opening edges of the respective openings to close the openings. In the housing, the inflow and outflow of gas inside and outside the housing are restricted, and it is a muffler that reduces sound by the vibration of the plurality of diaphragm portions.

Brief Description of the Drawings

[0006]

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[0007] [First Embodiment] As shown in FIGS. 1 and 2, the muffler 10 of the present embodiment includes a housing 11 having a plurality of chambers 20, and an opening 12 for opening these chambers 20 is formed in the housing 11. In the example of the present embodiment, as these chambers 20, a large chamber 20A and a plurality of small chambers 20B are provided, and the opening 12 opens on each of their one surfaces in the same direction. Hereinafter, the side where the opening 12 of the muffler 10 opens will be appropriately referred to as the front side, and the opposite side as the back side. For example, the large chamber 20A and each small chamber 20B form a concave structure that opens to a common outer surface (front surface), such as a flat surface of the housing 11. For example, the muffler 10 has a flat plate shape and is rectangular in shape when viewed from the thickness direction (see FIG. 3).

[0008] As shown in FIGS. 2 and 4, a plurality of small chambers 20B are provided around the large chamber 20A with respect to one large chamber 20A, and in the example of the present embodiment, two small chambers 20B are provided. Specifically, in the muffler 10 of the present embodiment, one large chamber 20A is formed in the housing 11, and two small chambers 20B are arranged so as to sandwich the large chamber 20A, and they are arranged side by side in the longitudinal direction of the muffler 10 (for example, arranged linearly).

[0009] The opening area of the opening 12 of the large room 20A is larger than the opening area of the opening 12 of the small rooms 20B, but it is preferably the same as the total opening area which is the sum of the opening areas of all the small rooms 20B. Also, the opening areas of the small rooms 20B are preferably the same, and the heights (depths) of the small rooms 20B are preferably the same (the volumes are preferably the same). In the example of this embodiment, the opening area of the opening 12 of the large room 20A is twice the opening area of the opening 12 of the small rooms 20B, and the volumes and shapes of the small rooms 20B are the same. Also, in the example of this embodiment, the heights (depths) of the large room 20A and the small rooms 20B are the same, and the total volume of the small rooms 20B is the same as the volume of the large room 20A. In the example of this embodiment, the large room 20A and the small rooms 20B are circular when viewed from the front side. Note that in this disclosure, when a plurality of quantities (for example, length, area, volume, etc.) are the same (uniform), it of course includes the case where they are exactly the same. For example, it also includes the meaning that the difference between one quantity and the other quantity is within the range of ±5%.

[0010] The housing 11 is provided with a ventilation passage 21 that extends from the large room 20A and communicates with each small room 20B. In the example of the present embodiment, the distance between the large room 20A and each small room 20B is the same, and the ventilation passages 21 have a uniform length. When the large room 20A and the small rooms 20B are circular as in the present embodiment, the length of the ventilation passage 21 is preferably shorter than the diameter difference between the large room 20A and the small rooms 20B. The width of the ventilation passage 21 is preferably set to be narrower than the radius of the small room 20B. The ventilation passages 21 preferably have the same cross-sectional area. In the example of the present embodiment, the ventilation passage 21 extends linearly and is arranged so as to be the shortest path connecting the rooms 20 (arranged on the line segment connecting the centers of the large room 20A and the small rooms 20B). In the example of the present embodiment, the height (depth) of the ventilation passage 21 is the same as that of the rooms 20 (the large room 20A and the small rooms 20B), and the bottom surfaces of the ventilation passage 21 and the rooms 20 are continuous without a step, but the height (depth) of the ventilation passage 21 can also be made lower (shallower) or higher (deeper) than the rooms 20. Further, in the example of the present embodiment, the ventilation passage 21 opens to the front side of the housing 11 (forms a concave structure that opens to the common front surface of the large room 20A and the small rooms 20B). Note that in the present disclosure, the uniform length includes not only the case where it is strictly the same as described above, but also the meaning that the difference in length is within the range of ±5%.

[0011] As shown in FIG. 2, in the example of the present embodiment, the housing 11 includes a base plate 13 and a surrounding wall portion 14 that protrudes from the base plate 13 to the front side. The base plate 13 has a flat plate shape. The surrounding wall portion 14 has a ring portion 15 that forms each room 20 inside and a pair of opposing walls 16 that form the ventilation passage 21 therebetween and are continuous with the ring portion 15. The ring portion 15 that forms each room 20 has a shape in which the opposing portions with the adjacent rooms 20 are open, and the open portions are communicated with each other by the ventilation passage 21. Then, the opening edge of the opening 12 is formed by the protruding front end surface of the ring portion 15.

[0012] As shown in Fig. 1, diaphragm parts 31 for closing the respective openings 12 are fixed to the opening edges of the respective openings 12 in the housing 11. As the diaphragm parts 31, a first diaphragm part 31A for closing the opening 12 of the large room 20A and a pair of second diaphragm parts 31B for closing the openings 12 of the respective small rooms 20B are provided.

[0013] In the example of the present embodiment, the first diaphragm part 31A and the second diaphragm part 31B are formed by a film body 30 (see Fig. 2) that is fixed so as to overlap the outer surface (front side surface) of the housing 11 and closes all the openings 12. Each diaphragm part 31 is capable of vibrating by sound, and in the silencer 10, the sound can be reduced by the vibration of the diaphragm part 31.

[0014] In the housing 11 of the present embodiment, the film body 30 closes not only the openings 12 but also the ventilation passage 21 that opens to the front side. As a result, the large room 20A, the small rooms 20B, and the ventilation passage 21 are closed, and the inflow and outflow of gas inside and outside the housing 11 are restricted. On the other hand, the ventilation passage 21 allows the inflow and outflow of gas between the large room 20A and the respective small rooms 20B.

[0015] In the example of the present embodiment, the silencer 10 is provided with a cover 19. The cover 19 sandwiches the film body 30 (diaphragm part 31) between the housing 11 (specifically, the opening edge of the opening 12). Cover openings 18 through which air can pass are formed in the cover 19 at positions corresponding to the respective openings 12 of the large room 20A and the small rooms 20B (for example, concentric positions). For example, the cover opening 18 has a size corresponding to the opening 12 of the housing 11 (for example, the shape and size are the same as those of the opening 12). For example, the cover 19 is placed on and fixed to the housing 11 (see Fig. 1). In the silencer 10 of the present embodiment, the cover 19 is provided so that only the first diaphragm part 31A and the second diaphragm part 31B are exposed in the film body 30.

[0016] As shown in FIG. 5, the muffler 10 may be provided with a protective fence 17 that covers the diaphragm portion 31 from the outside. For example, the protective fence 17 may be provided at the cover opening 18 in the cover 19. In this case, the protective fence 17 is preferably arranged at a position away from the vibrating diaphragm portion 31 so as not to come into contact with it.

[0017] In addition, as the material of the film body 30 (diaphragm portion 31), an elastic body is preferable. For example, EPDM (ethylene propylene rubber), TPU (thermoplastic polyurethane), TPO (olefin-based thermoplastic elastomer), etc. can be mentioned, but it is not limited thereto. Also, the thickness of the film body 30 (diaphragm portion 31) is not particularly limited as long as the film body 30 can vibrate due to sound (especially noise).

[0018] In addition, as the materials of the housing 11 and the cover 19, for example, thermoplastic resins such as polypropylene, polyethylene, ABS (acrylonitrile-butadiene-styrene copolymer), polycarbonate, etc. can be mentioned. The material of the housing 11 may be a thermosetting resin. For example, the housing 11 and the cover 19 may be made of resin (for example, a resin molded product such as an injection molded product), or may be made of metal.

[0019] The silencer 10 may be used in a vehicle such as an automobile or in a building. FIGS. 6 and 7 show an example in which the silencer 10 is used in a vehicle 90. In this example, the silencer 10 is provided on a seal plate 81. The seal plate 81 is disposed behind the front tire 82 of the vehicle 90 and is disposed opposite to the front fender liner 83 from the rear. Specifically, the seal plate 81 is sandwiched between and fixed to the front fender 84 and the front pillar 85 of the vehicle 90. And, for example, the silencer 10 is provided on the front surface 81M (the surface facing the front tire 82) of the seal plate 81. The diaphragm portion 31 is exposed on the front surface 81M of the seal plate 81. Since the seal plate 81 has a vertically long shape, it is preferable that the diaphragm portions 31 are arranged side by side in the longitudinal direction of the seal plate 81 (for example, the seal plate 81 is arranged such that the longitudinal direction is the vertical direction). Further, the seal plate 81 may be a resin molded product in which a seal plate body 81H is integrally molded with the housing 11 of the silencer 10. With this configuration, it becomes possible to facilitate the manufacture of the seal plate 81 with the silencer 10.

[0020] FIG. 8 shows another example in which the silencer 10 is used in a vehicle 90. In this example, the silencer 10 is provided on a fender liner 83 (for example, for the rear, see FIG. 6). In this fender liner 83, the silencer 10 is provided on the outer surface (for example, the position on the rear side of the rear or front tire 82) opposite to the surface (inner surface) facing the tire 82. The diaphragm portion 31 is exposed on the outer surface opposite to the surface (inner surface) facing the tire 82. Further, the fender liner 83 may be a resin molded product in which a fender liner body 83H is integrally molded with the housing 11 of the silencer 10. With this configuration, it becomes possible to facilitate the manufacture of the fender liner 83 with the silencer 10. Note that the silencer 10 may be provided on the inner surface of the fender liner 83 that faces the tire 82.

[0021] Further, for example, the muffler 10 may be attached to a body panel or an interior material (e.g., a roof liner, etc.) of the vehicle 90. Note that examples of the vehicle 90 include an electric vehicle, a plug-in hybrid vehicle, a hybrid vehicle, a fuel cell vehicle, etc. The muffler 10 may be attached to a wall, floor, ceiling, etc. of a building.

[0022] Next, the operation and effect of the muffler 10 of the present embodiment will be described. As shown in FIG. 9A, when sound S is input to the muffler 10 from the front side, for example, the sound S is input to the first diaphragm portion 31A (large room 20A). At this time, the first diaphragm portion 31A vibrates at a frequency corresponding to the frequency of the sound S. Here, as described above, the large room 20A, the small room 20B, and the ventilation passage 21 are closed by the housing 11 and the film body 30, and the inflow and outflow of gas inside and outside the housing 11 are restricted. On the other hand, the ventilation passage 21 allows the inflow and outflow of gas between the large room 20A and each small room 20B. Therefore, the sound S input to the large room 20A is transmitted to each small room 20B through the ventilation passage 21. As a result, the second diaphragm portion 31B that closes each small room 20B can be vibrated following the vibration of the first diaphragm portion 31A. At this time, as shown in FIG. 9A, when the first diaphragm portion 31A bulges toward the large room 20A side (inside) in response to the input of the sound S, conversely, the first diaphragm portion 31A bulges outward. That is, the second diaphragm portion 31B can vibrate at the same frequency as the first diaphragm portion 31A and in an opposite phase, and can output a sound S' of the same frequency as the sound S input to the first diaphragm portion 31A (large room 20A) and in an opposite phase. Thereby, the muffler 10 can cancel out the sound S and achieve sound attenuation. In particular, as in the example of the present embodiment, it is preferable that the opening area of the opening 12 of the large room 20A is the same as the total opening area (total opening area) of the openings 12 of the small rooms 20B, and it is more preferable that the volume of the large room 20A is the same as the total volume of the small rooms 20B. By doing so, it is possible to enhance the sound attenuation effect.

[0023] Also, when sound S is input to the muffler 10 from the front side, for example, as shown in FIG. 9B, the sound S may be input to each second diaphragm portion 31B (each small chamber 20B). In this case, the second diaphragm portion 31B vibrates at a frequency corresponding to the frequency of the sound S. Then, the sound S input to the small chamber 20B is transmitted to the large chamber 20A through the ventilation passage 21. As a result, the first diaphragm portion 31A that closes the large chamber 20A can be vibrated following the vibration of the second diaphragm portion 31B. And, it becomes possible to output a sound S' with the same frequency as the sound S and with an opposite phase from the first diaphragm portion 31A, and it becomes possible to cancel out the sound S and achieve sound attenuation.

[0024] Note that in the muffler 10, for the large chamber 20A and the small chamber 20B, by adjusting the opening area and volume of the opening 12, or by adjusting the thickness and material of the diaphragm portion 31, it is possible to achieve sound attenuation in a desired frequency band.

[0025] [Second Embodiment] FIGS. 10 and 11 show the muffler 10 of the second embodiment. In the muffler 10 of the present embodiment, the configuration of the housing 11 is different from that of the first embodiment. In the housing 11 of the present embodiment, the large chamber 20A, the small chamber 20B, and the ventilation passage 21 are constituted by recesses formed on the front side surface (for example, a flat surface) of the plate-shaped housing 11. Specifically, the housing 11 includes a plate member 41 and a closing member 42 that overlaps and is fixed to the back surface thereof. As shown in FIG. 11, the plate member 41 includes the large chamber 20A, each small chamber 20B, and the ventilation passage 21 with openings on both the front and back surfaces. And, the openings on the front side of the plate member 41 (the openings of the opening 12 and the ventilation passage 21) are closed by the film body 30. Also, the closing member 42 closes the openings on the back side of the large chamber 20A, the small chamber 20B, and the ventilation passage 21 in the plate member 41. Note that the housing 11 of the present embodiment may be one in which the plate member 41 and the closing member 42 are integrally formed (for example, a resin molded product such as an injection molded product).

[0026] Other aspects of the muffler 10 of this embodiment are the same as those of the muffler 10 of the first embodiment. The muffler 10 of this embodiment can also achieve the same effects as those of the first embodiment.

[0027] [Other Embodiments] In the above embodiment, the muffler 10 is in a flat plate shape, but the muffler 10 is not limited to this, and for example, it may be in a curved plate shape. In this case, the plurality of openings 12 may open facing the same side (front side). In this way, if the muffler 10 is in a curved plate shape, it becomes possible to easily provide the muffler 10 on a curved surface such as the fender liner 83.

[0028] In the above embodiment, the opening 12 of the room 20 of the housing 11 is circular, but the opening 12 is not limited to this, and it may be elliptical or polygonal (for example, regular polygonal).

[0029] As shown in FIGS. 12 and 13, the muffler 10 may be provided with three or more small rooms 20B connected to one large room 20A via the air passages 21. In the example shown in the figure, a plurality of air passages 21 extend radially from the circular large room 20A, and a plurality of small rooms 20B are arranged around the large room 20A. Even in the case where there are three or more small rooms 20B like this, it is preferable that the total opening area of the openings 12 of the small rooms 20B is the same as the opening area of the large room 20A. Furthermore, it is preferable that the total volume of the small rooms 20B is the same as the volume of the large room 20A. Also, it is preferable that the sizes and shapes of the small rooms 20B are the same. Even in these cases, the small rooms 20B are preferably arranged at equal intervals in the circumferential direction of the large room 20A and are preferably rotationally symmetric.

[0030] In the muffler 10 of the above-described embodiment, an orifice that allows a very small amount of gas to flow in and out inside and outside the housing 11 and relaxes the pressure difference between the inside and outside of the housing 11 may be provided. Further, in the above-described embodiment, the housing 11 may be formed of a porous body having air permeability that allows a very small amount of gas to flow in and out inside and outside the housing 11 and can relax the pressure difference between the inside and outside of the housing 11. Examples of such a porous body include foams, and examples of the foam include those made of polyurethane resin and those made of polyolefin-based resins (such as polypropylene resin and polyethylene resin).

[0031] In the above-described embodiment, each diaphragm portion 31 was provided on the common film body 30, but may be provided on separate film bodies.

Example

[0032] Hereinafter, the above-described embodiment will be described in more detail with reference to Examples and Comparative Examples, but the muffler of the present disclosure is not limited to the following Examples. The muffling effects of the mufflers of the Examples and Comparative Examples were evaluated.

[0033] (1) Mufflers of Examples and Comparative Examples <Examples 1 and 2> The mufflers of Examples 1 and 2 are the muffler 10 of the first embodiment shown in FIGS. 1 to 9, and include one large room 20A and two small rooms 20B, which are circular when viewed from the front side. The diameter of the large room 20A (opening 12) is 41 mm, the diameter of each small room 20B (opening 12) is 29 mm, and the height (depth) of these rooms 20 is 10 mm. The large room 20A and the small rooms 20B are arranged such that their centers are aligned in a straight line at equal intervals. Regarding the ventilation path 21, the width is 5 mm, the length is 10 mm, and the height (depth) is 10 mm. The cover opening 18 of the cover 19 is also circular, and the diameter of the cover opening 18 corresponding to the large room 20A is 41 mm, and the diameter of the cover opening 18 corresponding to the small room 20B is 29 mm. The film body 30 is made of EPDM with a thickness of 0.3 mm.

[0034] In Example 1, the muffler 10 was provided on the front surface of the seal plate 81 in the front right of the vehicle 90 (electric vehicle) (the surface facing the right front tire 82).

[0035] In Example 2, the muffler 10 was provided on the rear side portion of the right rear tire 82 of the outer surface of the rear fender liner 83 in the rear right of the vehicle 90 (electric vehicle).

[0036] <Comparative Example 1> In Comparative Example 1, the muffler 10 was not provided in the vehicle 90 (electric vehicle).

[0037] (2) Evaluation method For Example 1, 2 and Comparative Example 1, the noise level (sound pressure level) was evaluated. Specifically, with the vehicle 90 (electric vehicle) traveling forward at 50 km / h on a rough road surface, the noise level (dB(A)) inside the vehicle was measured with a microphone installed at position P near the driver's ear (see Fig. 14).

[0038] (3) Evaluation results As shown in Figs. 15 and 16, in Examples 1 and 2 where the muffler 10 was provided in the vehicle 90, compared with Comparative Example 1 where the muffler 10 was not provided, in the frequency range of 50 to 500 Hz, which is the frequency range of the sound that is particularly concerning to the passengers, it was confirmed that the noise level (dB(A)) inside the vehicle was significantly reduced.

[0039] <Supplementary Note> Hereinafter, the feature groups extracted from the above-described embodiments and examples will be described while showing effects etc. as necessary. In the following, for ease of understanding, the corresponding configurations in the above-described embodiments are appropriately shown in parentheses etc., but these feature groups are not limited to the specific configurations shown in these parentheses etc.

[0040] For example, the following feature groups relate to a muffler, a seal plate, and a fender liner having the same. Regarding the background art of "Conventionally, various mufflers have been proposed (see, for example, JP-A-2012-047168 (paragraphs

[0027] to

[0040] , FIGS. 1 to 5, etc.)), it can be considered that they were conceived with the problem of "There is a need to develop a new muffler." Also, conventionally, there has been a need to develop components having a new muffler, such as a seal plate and a fender liner.

[0041] [Feature 1] A housing provided with a large room and a plurality of small rooms connected by a plurality of ventilation passages extending from the large room, and openings facing the same direction are formed on one surface of each of the large room and the plurality of small rooms, A plurality of diaphragm portions fixed to the opening edges of the respective openings and closing the openings, In the housing, the inflow and outflow of gas inside and outside the housing are regulated, and a muffler that reduces sound by the vibration of the plurality of diaphragm portions.

[0042] According to the above features, a new muffler can be provided. Also, compared with the above conventional configuration, it is possible to achieve a compact size.

[0043] [Feature 2] The muffler according to Feature 1, wherein the opening area of the opening of the large room is the same as the total opening area of the openings of the plurality of small rooms.

[0044] [Feature 3] The muffler according to Feature 1 or 2, wherein the plurality of ventilation passages have a uniform length.

[0045] [Feature 4] The muffler according to any one of Features 1 to 3, wherein the large room, the plurality of small rooms, and the plurality of ventilation passages form a concave structure opening to a common flat outer surface of the housing, and the opening on the outer surface is closed by a film body fixed by overlapping on the outer surface of the housing, and the plurality of diaphragm portions are formed.

[0046] [Feature 5] The muffler according to any one of Features 1 to 4, comprising an orifice that allows the inflow and outflow of gas with an extremely small flow rate inside and outside the housing to relieve the air pressure difference between the inside and outside of the housing.

[0047] [Feature 6] The muffler according to any one of Features 1 to 5, comprising a protective fence that covers the plurality of diaphragm portions from the outside.

[0048] [Feature 7] The muffler according to any one of Features 1 to 6, wherein the number of the small rooms is two, and they are arranged so as to sandwich the large room therebetween.

[0049] [Feature 8] The muffler according to any one of Features 1 to 7, wherein the large room is circular, the plurality of ventilation passages extend radially from the large room, and the plurality of small rooms are arranged around the large room.

[0050] [Feature 9] The muffler according to any one of Features 1 to 8, wherein the plurality of small rooms are arranged rotationally symmetrically with respect to the large room.

[0051] [Feature 10] The muffler according to any one of Features 1 to 10, wherein the housing is an injection-molded product.

[0052] [Feature 11] The housing includes a plate member having openings for the large room, the plurality of small rooms, and the plurality of ventilation passages on both the front and back surfaces, and the opening on the front surface is closed by the film body, and a closing member that is fixed so as to overlap the back surface of the plate member and closes the opening on the back surface of the plate member. The muffler according to Feature 4.

[0053] [Feature 12] A seal plate that is disposed behind the front tire of a vehicle, fixed to a pillar (front pillar 85), and faces the fender liner from the rear, A seal plate comprising a seal plate body having a silencer according to any one of features 1 to 5 on the front surface, and the housing of the silencer being an integrally molded resin product.

[0054] [Feature 13] A fender liner of a vehicle, A fender liner having a silencer according to any one of features 1 to 5 on the back surface with respect to the surface facing the tire, and the housing of the silencer being an integrally molded resin product and comprising a fender liner body.

[0055] Note that although specific examples of the technology included in the claims are disclosed in this specification and the drawings, the technology described in the claims is not limited to these specific examples, but also includes those obtained by various modifications and changes of the specific examples, and those obtained by taking out a part from the specific examples alone.

Explanation of Reference Numerals

[0056] 10 Silencer 11 Housing 12 Opening 13 Base Plate 14 Enclosing Wall Portion 15 Ring Portion 16 Opposing Wall 17 Protective Fence 18 Cover Opening 19 Cover 20 Room 20A Large Room 20B Small Room 21 Ventilation Passage 30 Film Body 31 Diaphragm Portion 31A First Diaphragm Portion 31B Second Diaphragm Portion 41 Plate Member 42 Closing Member 81 Seal Plate 81H Seal Plate Body 81M Front 82 Tire 83 Fender Liner 83H Fender Liner Body 84 Front Fender 85 Front Pillar 90 Vehicle

Claims

1. A housing having a large room and a plurality of small rooms connected by a plurality of ventilation passages extending from the large room, and openings facing in the same direction being formed on one surface of each of the large room and the plurality of small rooms; a plurality of diaphragm portions fixed to the opening edges of the respective openings to close the openings; a muffler disposed within the housing, in which the inflow and outflow of gas inside and outside the housing are restricted, and sound is reduced by the vibration of the plurality of diaphragm portions.

2. The muffler according to claim 1, wherein an opening area of the opening of the large room is the same as a total opening area of the openings of the plurality of small rooms.

3. The muffler according to claim 1, wherein the plurality of ventilation passages have a uniform length.

4. The large room, the plurality of small rooms, and the plurality of ventilation passages form a concave structure opening to a common flat outer surface of the housing, and an opening on the outer surface is closed by a film body fixed by overlapping on the outer surface of the housing, and the plurality of diaphragm portions are formed. The muffler according to claim 1.

5. The muffler according to claim 1, further comprising a protective fence covering the plurality of diaphragm portions from the outside.

6. A seal plate disposed behind the front tire of a vehicle, fixed to a pillar, and facing a fender liner from the rear, comprising a seal plate body having the muffler according to any one of claims 1 to 5 on the front surface, and the housing of the muffler being an integrally molded resin product.

7. A vehicle fender liner, having the muffler according to any one of claims 1 to 5 on an outer surface opposite to a surface facing the tire, and comprising a fender liner body in which the housing of the muffler is an integrally molded resin product.

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