Sound leakage suppression mask

Abstract

To provide a sound leakage suppression mask which can suitably suppress sound leakage to the outside.SOLUTION: A sound leakage suppression mask includes a mask body for covering a wearer's mouth. The mask body has a base part 15. A first space 23 opened toward a user's mouth is formed in the base part 15. A first sound absorption material 61 is provided in the first space 23. The first sound absorption material 61 is arranged in a state in which the material is pushed into a bottom 23a of the first space 23.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a sound leakage suppression mask that suppresses the sound emitted by a user from leaking to the outside. [Background technology]

[0002] Patent Document 1 discloses a mask having a sound leakage suppression function that suppresses the sound emitted by the user from leaking to the outside. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-3968 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the mask of Patent Document 1, it is difficult to effectively suppress sound leakage to the outside.

[0005] The present invention has been made in view of the above circumstances, and has as its main object to provide a sound leakage suppression mask that can suitably suppress sound leakage to the outside. [Means for solving the problem]

[0006] In order to achieve the above object, the sound leakage suppression mask of the present invention comprises: A sound leakage suppression mask that suppresses the sound emitted by a user from leaking to the outside, a mask body that covers the user's mouth; The mask body has a recessed internal space that opens toward the user's mouth, A first sound absorbing material is provided in the internal space. [Effects of the Invention]

[0007] According to the present invention, an internal space that opens toward the user's mouth is formed in the mask body, and a first sound-absorbing material is provided in the internal space, so that the first sound-absorbing material can absorb the user's voice that enters the internal space, thereby effectively suppressing sound leakage to the outside. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a front view of the sound leakage suppression mask. [Figure 2] FIG. 2 is a perspective view of the mask body as seen from the front. [Figure 3] FIG. 2 is a perspective view of the mask body as seen from the rear. [Figure 4] FIG. 2 is a perspective view of the base portion as seen from the rear. [Figure 5] 1A and 1B are perspective views showing a state in which a lid portion is attached to a base portion, where FIG. 1A is a view from diagonally above, and FIG. 1B is a view from diagonally below. [Figure 6] 1(a) is a perspective view of the face rest portion seen from behind, and FIG. 1(b) is a perspective view of the face rest portion seen from the front. [Figure 7] FIG. 2 is a front view showing the sound leakage suppression mask in a worn state. [Figure 8] 4 is an exploded perspective view showing the base portion, the passage forming member, and the first sound absorbing material. FIG. [Figure 9] 10 is a front view showing a state in which a passage forming member and a first sound absorbing material are provided in a first space of the base portion. FIG. [Figure 10] FIG. 2 is an exploded perspective view showing the face rest and the second sound-absorbing material. [Figure 11] FIG. 10 is a perspective view showing a state in which a second sound-absorbing material is provided inside the annular portion of the face rest, and also shows the first sound-absorbing material. [Figure 12] FIG. 10 is a cross-sectional view taken along line AA in FIG. 9. [Figure 13] FIG. 10 is a cross-sectional view taken along line BB in FIG. 9. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sound leakage suppression mask according to one embodiment of the present invention will now be described with reference to the drawings.

[0010] 1, the sound leakage suppression mask 10 includes a mask body 11 that covers the user's mouth, a band 12 for attaching the mask body 11 to the user's face, and a pair of wired earphones 13 that are attached to the user's ears. The mask body 11 has a horizontally elongated shape that extends in the left-right direction, and covers only the user's mouth but not the nose (see also FIG. 7).

[0011] The bands 12 are string-like or belt-like and are attached to both left and right ends of the mask body 11. The bands 12 are hung around the user's ears or the back of the head, thereby attaching the mask body 11 to the user's face. The bands 12 may be hung around both the user's ears and the back of the head. In the following description, the front-rear direction, left-right direction, and up-down direction are defined based on the state in which the mask body 11 is worn on the user's face.

[0012] 1 to 3, the mask body 11 has a base portion 15 that forms the front surface of the mask body 11, and a face support portion 16 that is provided behind the base portion 15 and comes into close contact with the user's face. The base portion 15 is made of a resin material. As shown in FIG. 4, the base portion 15 has a front plate portion 17 that forms the front surface of the mask body 11, and a ring-shaped surrounding wall portion 18 that extends rearward from the peripheral edge of the front plate portion 17.

[0013] The front plate 17 is formed in the shape of an oval plate extending in the left-right direction. More specifically, both left-right ends of the front plate 17 are slightly curved rearward. The periphery of the front plate 17 extends outward beyond the surrounding wall 18, and this extending portion forms an annular flange 19. The surrounding wall 18 is also formed in the shape of an oval ring extending in the left-right direction.

[0014] The base portion 15 is provided with a plurality of spaces 23 to 25 that are open to the rear. These spaces 23 to 25 include a first space 23 provided in the center of the base portion 15 in the left-right direction, a pair of second spaces 24 provided on both sides of the first space 23 in the left-right direction, and a third space 25 provided below the first space 23. Although not shown, each of the second spaces 24 and third spaces 25 is provided with electrical components such as a circuit board and a battery.

[0015] The first space 23 is divided on all four sides by walls 34. The walls 34 extend rearward from the front plate 17 of the base 15. The walls 34 include a wall 34a provided on the upper side of the first space 23, a wall 34b provided on the lower side of the first space 23, and a pair of walls 34c provided on both the left and right sides of the first space 23. The wall 34a is made up of a part of the surrounding wall 18. The wall 34b divides the first space 23 from the third space 25, and the wall 34c divides the first space 23 from the second space 24.

[0016] As shown in FIGS. 5(a) and 5(b), the base portion 15 is provided with two lid portions 31 that respectively cover the openings of the second spaces 24, and a lid portion 32 that covers the opening of the third space 25. In contrast, no such lid portion is provided for the first space 23. Therefore, of the spaces 23 to 25 in the base portion 15, only the first space 23 is a space that opens toward the rear. Furthermore, the first space 23 is a concave space that opens toward the rear, and has a rectangular shape when viewed from behind. The first space 23 corresponds to the "internal space." Furthermore, the base portion 15 is provided with a plurality of protrusions 35 that protrude toward the rear and extend along the peripheral wall portion 18.

[0017] Next, we will explain the face support portion 16. As shown in Figures 6(a) and (b), the face support portion 16 has an annular portion 41 formed in an annular shape and a wall portion 42 provided on the inside surrounded by the annular portion 41. The face support portion 16 is made of a rubber material, for example, silicone rubber.

[0018] The annular portion 41 is formed in an oval ring shape that is long in the left-right direction. The annular portion 41 is the portion that fits tightly against the user's face around the user's mouth. Therefore, the user's mouth is accommodated inside the area surrounded by the annular portion 41. The annular portion 41 also has a groove-like annular space 44 that is open to the front (in other words, toward the base portion 15). The annular space 44 is formed in a ring shape that follows the annular portion 41.

[0019] A plurality of slit grooves 47 that open forward are formed on the outer periphery of the annular portion 41. The protrusions 35 of the base portion 15 are fitted into these slit grooves 47. This allows the face rest 16 to be detachably attached to the base portion 15 (see FIGS. 2 and 3). The annular portion 41 also has a plate-shaped extension 51 that extends forward from its upper edge. The extension 51 is attached to the upper surface of the peripheral wall 18 (specifically, wall 34a) of the base portion 15 (see FIGS. 2 and 3). More specifically, a plurality of protrusions 53 are provided on the lower surface of the extension 51, and these protrusions 53 are fitted into a plurality of holes 54 (see FIGS. 4 and 5(a)) formed in the peripheral wall 18.

[0020] The wall portion 42 is provided to close the inner area surrounded by the annular portion 41, and is disposed at the front end of the annular portion 41. A plurality of slit holes 45 are formed in the wall portion 42, penetrating the wall portion 42 in the thickness direction. The first space 23 of the base portion 15 opens rearward through these slit holes 45 (and thus the inside surrounded by the annular portion 41). This allows the sound uttered by the user to enter the first space 23 of the base portion 15 through the slit holes 45.

[0021] When a user wears the sound leakage reduction mask 10 on their face and converses with others, the conversation is carried out using, for example, a smartphone. In this case, the voice emitted by the user is detected by a microphone (not shown) provided on the base unit 15. The detected voice is wirelessly transmitted to the user's smartphone, and the voice is then transmitted from the user's smartphone to the other person's smartphone. Furthermore, when the other person's voice is transmitted from the other person's smartphone to the user's smartphone, the voice is wirelessly transmitted from the user's smartphone to the mask body 11. The transmitted voice is then output from the earphone 13. This allows the user to hear the other person's voice.

[0022] Here, a sound absorbing structure that absorbs the sound emitted by the user is provided on the mask body 11. Hereinafter, such a sound absorbing structure will be described.

[0023] As shown in FIGS. 4, 5(a), and 5(b), the base portion 15 of the mask body 11 has an uneven region 56 formed in an uneven shape on the bottom 23a of the first space 23. The uneven region 56 is made of a gypton structure and is formed over most of the bottom 23a. The user's voice entering the first space 23 is absorbed in the uneven region 56. The uneven region 56 is provided on both left and right sides of the bottom 23a of the first space 23. Specifically, the bottom 23a of the first space 23 has a pair of uneven regions 56 on the left and right, and a non-uneven region 57 formed between the uneven regions 56. The non-uneven region 57 is an area without any unevenness and is located in the center of the first space 23 in the left-right direction. The non-uneven region 57 is also an elongated region extending in the up-down direction.

[0024] As shown in FIGS. 8 and 9, a first sound-absorbing material 61 is provided in the first space 23. The first sound-absorbing material 61 is made of a material having sound-absorbing properties, such as polyurethane foam. The first sound-absorbing material 61 is formed to have approximately the same size as the first space 23 and has elasticity. The first sound-absorbing material 61 is arranged in a state where it is pressed into the bottom 23a of the first space 23 (see also FIGS. 12 and 13). In this case, the first sound-absorbing material 61 is arranged so as to fill the first space 23. The user's voice entering the first space 23 is absorbed by the first sound-absorbing material 61.

[0025] As shown in Figures 10 and 11, a second sound-absorbing material 62 is provided in the annular space 44 of the annular portion 41 of the face support portion 16. The second sound-absorbing material 62 is made of a material having sound-absorbing properties, such as polyurethane foam. The second sound-absorbing material 62 has an annular shape extending in the circumferential direction of the annular portion 41 and is arranged to fill the annular space 44. As a result, the sound emitted by the user is absorbed not only by the first sound-absorbing material 61 but also by the second sound-absorbing material 62. The second sound-absorbing material 62 is arranged behind the first sound-absorbing material 61. The first sound-absorbing material 61 and the second sound-absorbing material 62 are arranged side by side in the front-to-rear direction and are in contact with each other.

[0026] The mask body 11 is provided with a structure for guiding the user's exhaled breath that enters the first space 23 to the outside of the mask body 11. This structure will be described below.

[0027] As shown in Figures 4, 5(a) and 5(b), and 12, the base portion 15 is formed with an outlet path 63 that guides the user's exhaled breath that has entered the first space 23 to the outside of the mask body 11. The outlet path 63 is provided below the first space 23, and connects the first space 23 to the outside of the mask body 11. The outlet path 63 extends downward from the first space 23 and opens to the outside of the mask body 11 on the underside of the base portion 15. This allows the user's exhaled breath to be guided below the mask body 11 through the outlet path 63. The outlet path 63 is located at the same position in the left-right direction as the center of the first space 23.

[0028] The first space 23 is surrounded by the walls 34, and the walls 34 form a peripheral surface 23b of the first space 23. The outlet path 63 opens into the first space 23 at the lower peripheral surface 23b. More specifically, the outlet path 63 opens at the boundary between the lower peripheral surface 23b and the bottom 23a.

[0029] As shown in Figures 8, 9, 12, and 13, a passage forming member 65 is provided on the bottom 23a of the first space 23. The passage forming member 65 is made of a resin material. The passage forming member 65 has a groove shape that opens toward the bottom 23a, and more specifically, is formed in a semicircular tubular shape (half-split tubular shape). The passage forming member 65 is disposed so as to extend in the vertical direction along the bottom 23a.

[0030] The passage forming member 65 is disposed in the center of the bottom 23a in the left-right direction. The passage forming member 65 is disposed in the non-convexo-concave region 57 of the bottom 23a, and extends over the entire vertical area of ​​the non-concave region 57 (and therefore the entire vertical area of ​​the bottom 23a). The passage forming member 65 is also located at the same position as the outlet path 63 in the left-right direction. In this case, the passage forming member 65 extends in the vertical direction toward the outlet path 63.

[0031] The passageway forming member 65 is interposed between the bottom 23a of the first space 23 and the first sound-absorbing material 61. The passageway forming member 65 is provided so as to protrude from the bottom 23a toward the first sound-absorbing material 61 (in other words, rearward). As a result, the first sound-absorbing material 61 is compressed rearward by the passageway forming member 65, and as a result, the first sound-absorbing material 61 is partially separated from the bottom 23a. This separation forms a passage space 66 between the bottom 23a and the first sound-absorbing material 61. The passageway forming member 65 corresponds to the "protruding portion," and the passage space 66 corresponds to the "predetermined space portion."

[0032] The passage space 66 is formed inside the passage forming member 65. The passage space 66 is the space between the passage forming member 65 and the bottom 23a, and extends in the vertical direction. The passage space 66 communicates with the outlet path 63 at its lower end. In other words, the passage space 66 is continuous with the outlet path 63.

[0033] A notch 69 is formed in a wall 67 surrounding the passage space 66 of the passage forming member 65. The notch 69 is formed at the upper end of the wall 67, in other words, at the end of the wall 67 opposite to the side of the outlet path 63. The notch 69 is formed in a semicircular shape that is open upward. The inside and outside of the passage space 66 are connected by this notch 69. The notch 69 corresponds to the "connecting portion."

[0034] According to the above configuration, the user's exhaled air entering the first space 23 passes through the first sound-absorbing material 61 and then enters the passage space 66 through the cutout portion 69 of the passage forming member 65 (see FIG. 12). The exhaled air then flows through the passage space 66 to the outlet path 63 and is discharged from the outlet path 63 to the outside of the mask body 11.

[0035] According to the configuration of this embodiment described above in detail, the following excellent effects can be obtained.

[0036] (1) The mask body 11 is formed with a first space 23 that opens toward the user's mouth, and the first sound-absorbing material 61 is provided in the first space 23. This allows the first sound-absorbing material 61 to absorb the user's voice that enters the first space 23. This effectively prevents sound from leaking to the outside.

[0037] (2) The mask body 11 has a base portion 15 in which the first space 23 is formed, and an annular portion 41 that is provided behind the base portion 15 and fits closely to the user's face around the user's mouth. In addition to a first sound-absorbing material 61 provided in the first space 23 of the base portion 15, an annular second sound-absorbing material 62 is provided inside the annular portion 41. In this case, since the sound-absorbing material is provided not only in front of the user's mouth but also around the user's mouth, these sound-absorbing materials 61, 62 can effectively absorb the user's voice. This further reduces sound leakage to the outside.

[0038] (3) The first sound-absorbing material 61 and the second sound-absorbing material 62 are formed separately and are provided in contact with each other. This enhances the sound-absorbing effect of each sound-absorbing material 61, 62 and further reduces sound leakage to the outside.

[0039] (4) The mask body 11 is formed with an outlet path 63 that guides the user's exhaled breath that enters the first space 23 to the outside of the mask body 11. This makes it possible to prevent moisture contained in the user's exhaled breath from accumulating in the first space 23.

[0040] Furthermore, a passage space 66 is formed between the bottom 23a of the first space 23 and the first sound-absorbing material 61. The outlet path 63 connects the passage space 66 to the outside of the mask body 11. With this configuration, when the user's voice leaks to the outside through the outlet path 63, the voice that has passed through the first sound-absorbing material 61, i.e., the voice that has been absorbed by the first sound-absorbing material 61, leaks to the outside. Therefore, it is possible to suppress moisture accumulation in the first space 23 while suppressing sound leakage to the outside.

[0041] (5) The first sound-absorbing material 61 is arranged in a state where it is pushed into the first space 23 up to the bottom 23a. In this case, the first sound-absorbing material 61 can be arranged throughout the first space 23, thereby enhancing the sound-absorbing effect of the first sound-absorbing material 61.

[0042] Furthermore, the passage forming member 65 is provided so as to protrude from the bottom 23a of the first space 23 toward the first sound absorbing material 61, thereby partially separating the first sound absorbing material 61 from the bottom 23a, thereby forming a passage space 66. In this case, the first sound absorbing material 61 is configured to be pressed into the bottom 23a of the first space 23, thereby reliably forming the passage space 66. This makes it possible to reliably prevent moisture from accumulating in the first space 23 while enhancing the sound absorbing effect of the first sound absorbing material 61.

[0043] (6) The outlet path 63 opens at the peripheral surface 23b of the first space 23. The passage forming member 65 extends along the bottom 23a of the first space 23 toward the outlet path 63 and has a groove shape that opens toward the bottom 23a. A passage space 66 that communicates with the outlet path 63 is formed inside the passage forming member 65. A notch 69 that communicates between the inside and outside of the passage space 66 is formed in a wall portion 67 of the passage forming member 65 that surrounds the passage space 66, on the side opposite to the side of the outlet path 63.

[0044] In the above configuration, the user's exhaled air entering the first space 23 flows into the passage space 66 through the cutout portion 69. Then, the exhaled air is guided to the outlet path 63 through the entire passage space 66 and is guided to the outside of the mask body 11 from the outlet path 63. In this configuration, when the user's voice leaks to the outside of the mask body 11 through the outlet path 63, the voice leaks through the entire passage space 66. Therefore, it is possible to further suppress sound leakage to the outside.

[0045] (7) The passage forming member 65 extends in the vertical direction along the bottom 23a of the first space 23. The notch 69 is disposed on the upper side of the wall 67 of the passage forming member 65. The outlet path 63 is disposed below the passage forming member 65 and guides the user's exhaled breath below the mask body 11. This configuration can further reduce sound leakage to the outside while preventing the user's exhaled breath from hitting the user's face.

[0046] (8) The passage forming member 65 is formed separately from the base portion 15 of the mask body 11. This allows the passage forming member 65 to be removed from the base portion 15 (first space 23) and washed.

[0047] (9) Note that, in order to obtain the above-mentioned effects (4) to (8), it is not necessarily required to provide the second sound-absorbing material 62. In other words, even if the second sound-absorbing material 62 is not provided, it is possible to obtain the above-mentioned effects (4) to (8).

[0048] The present invention is not limited to the above-described embodiment, and may be implemented, for example, as follows.

[0049] In the above embodiment, the first sound-absorbing material 61 and the second sound-absorbing material 62 are formed separately from each other, but the first sound-absorbing material 61 and the second sound-absorbing material 62 may be formed integrally. In this case, too, it is possible to enhance the sound-absorbing effect of each sound-absorbing material 61, 62.

[0050] In the above embodiment, the passage forming member 65 is formed in a groove shape extending along the bottom portion 23a, but this may be modified so that the passage forming member is formed in a tubular shape extending along the bottom portion 23a. In this case, a passage space that communicates with the outlet path 63 is formed inside the passage forming member. Also in this case, a notch (corresponding to a communication portion) that communicates between the inside and outside of the passage space can be formed in the wall portion of the passage forming member that surrounds the passage space. If the notch is provided on the upper side of the wall portion, it is possible to further suppress sound leakage to the outside.

[0051] In the above embodiment, the passage forming member 65 is formed separately from the base portion 15, but the passage forming member 65 may be formed integrally with the base portion 15.

[0052] In the above embodiment, the notch 69 is provided in the wall portion 67 of the passage forming member 65, but a hole may be provided instead of the notch 69. In this case, the hole corresponds to the "communication portion."

[0053] In the above embodiment, the outlet path 63 is disposed below the first space 23 so that the user's exhaled breath is guided downward through the outlet path 63 to the mask body 11. However, for example, the outlet path may be disposed laterally with respect to the first space 23 so that the user's exhaled breath is guided laterally through the outlet path to the mask body 11. In this case, the outlet path is formed to open on the peripheral surface 23b on the left or right side of the first space 23. The passage forming member is disposed to extend in the left-right direction toward the outlet path.

[0054] In the above embodiment, a groove-shaped passage forming member 65 is provided as a protrusion that protrudes from the bottom 23a toward the first sound-absorbing material 61, but the configuration of the protrusion is not necessarily limited to this. For example, a flat plate-like member that protrudes from the bottom 23a toward the first sound-absorbing material 61 may be provided as the protrusion. In this case, too, by using the plate-like member to partially separate the first sound-absorbing material 61 from the bottom 23a, a predetermined space can be formed between the bottom 23a and the first sound-absorbing material 61.

[0055] For example, the first sound-absorbing material 61 may be provided in the first space 23 at a distance from the bottom 23a. In this case, a space extending across the entire bottom 23a is formed between the bottom 23a and the first sound-absorbing material 61. This space is then connected to the outside of the mask body 11 via the outlet path 63. In this configuration, the first sound-absorbing material 61 is held at a distance from the bottom 23a by being pressed into the first space 23. This eliminates the need for a protrusion protruding from the bottom 23a toward the first sound-absorbing material 61, thereby simplifying the configuration. [Explanation of symbols]

[0056] 10...sound leakage suppression mask, 11...mask main body, 15...base portion, 41...annular portion, 23...first space as internal space, 23a...bottom portion, 23b...circumferential surface portion, 61...first sound-absorbing material, 62...second sound-absorbing material, 63...outlet path, 65...passage-forming member as protrusion, 66...passage space as space portion, 67...wall portion, 69...notch portion as communicating portion.

Claims

1. A sound leakage suppression mask that suppresses the sound emitted by a user from leaking to the outside, a mask body that covers the user's mouth; The mask body has a recessed internal space that opens toward the user's mouth, A sound leakage suppression mask, wherein a first sound absorbing material is provided in the internal space.

2. The mask body includes: a base portion in which the internal space is formed; a ring-shaped portion provided at the rear of the base portion and adapted to fit closely to the user's face around the user's mouth, The internal space is open through an inside surrounded by the annular portion, The sound leakage suppression mask according to claim 1 , wherein an annular second sound absorbing material is provided inside the annular portion.

3. 3. The sound leakage suppression mask according to claim 2, wherein the first sound-absorbing material and the second sound-absorbing material are formed separately and in contact with each other, or are formed integrally.

4. The mask body has an outlet path formed therein for guiding the user's exhaled air entering the internal space to the outside of the mask body, a predetermined space is formed between the bottom of the internal space and the first sound-absorbing material, The sound leakage suppression mask according to claim 1 , wherein the outlet path connects the space with the outside of the mask body.

5. The first sound-absorbing material is disposed in the internal space in a state where it is pushed up to the bottom, 5. The sound leakage suppression mask according to claim 4, further comprising a protrusion that protrudes from the bottom toward the first sound-absorbing material, thereby partially separating the first sound-absorbing material from the bottom, thereby forming the space.

6. The outlet path opens at a peripheral surface of the internal space, the protrusion extends along the bottom toward the outlet path and has a tubular shape or a groove shape that is open toward the bottom, A passage space communicating with the outlet path is formed as the space portion inside the protrusion, 6. The sound leakage suppression mask according to claim 5, wherein a communication portion that communicates the inside and outside of the passage space is formed on a wall portion of the protrusion that surrounds the passage space, on a side opposite to the side of the outlet path.

7. The protrusion extends in the up-down direction along the bottom portion, the communication portion is disposed on an upper side of the wall portion, The sound leakage suppression mask according to claim 6 , wherein the outlet path is disposed below the protrusion and guides the user's exhaled air downwards in the mask body.

Images