Acoustic device

Abstract

An acoustic device 10 comprises a partition wall member 30, 40 that partitions a back space 60 into a flow path space 61 and a waterproof space 62. The partition wall member 30, 40 includes: a partition wall body 30 provided with a communication hole 31a; and a mesh sheet 40 that closes the communication hole 31a. A plurality of openings 52a include a plurality of first openings 52a. The mesh sheet 40 is provided in parallel to the direction of a water flow formed in the flow path space 61 by water flowing into the flow path space 61 through the first openings 52a.

Description

Audio device

[0001] The present disclosure relates to an audio device.

[0002] Patent Document 1 discloses an audio device including a speaker and a housing that covers the speaker from the back side.

[0003] Registered Utility Model No. 3202035

[0004] An object of the present disclosure is to realize good acoustic performance while preventing problems caused by water intrusion in an audio device including a speaker and a housing that covers the speaker from the back side.

[0005] The audio device according to the first aspect includes a speaker, a housing that covers the speaker from the back side, forms a back space that is a space on the back side of the speaker inside, and is provided with a plurality of openings connected to the back space, a partition member that partitions the back space into a flow path space connected to the outside of the housing through the plurality of openings and a waterproof space that is a space to be waterproofed. The partition member includes a partition main body provided with a communication hole that communicates the waterproof space and the flow path space, and a mesh sheet that closes the communication hole. The plurality of openings include a plurality of first openings, and the mesh sheet is provided so that water flowing into the flow path space through the first openings is parallel to the direction of the water flow formed in the flow path space.

[0006] In this aspect, the audio device includes a speaker and a housing. The housing covers the speaker from the back side and forms a back space that is a space on the back side of the speaker inside.

[0007] By the way, if the back space inside the housing is blocked, good acoustic performance cannot be realized. Therefore, in this aspect, the housing is provided with a plurality of openings connected to the back space.

[0008] However, if the housing has an opening that connects to the rear space, water may enter the rear space through this opening, potentially causing malfunctions. These malfunctions could include, for example, corrosion of the speaker's magnetic circuit or terminal components. Therefore, in this embodiment, the acoustic device includes a partition member that divides the rear space into a flow channel space connected to the outside of the housing by multiple openings, and a waterproof space that must be waterproofed. The partition member comprises a partition body with communication holes connecting the waterproof space and the flow channel space, and a mesh sheet that seals the communication holes. As a result, air from the rear of the speaker can flow out of the device through the waterproof space, mesh sheet, flow channel space, and multiple openings. Furthermore, since the communication holes are sealed by the mesh sheet, water cannot enter the waterproof space. Therefore, good acoustic performance can be achieved while preventing malfunctions caused by water ingress.

[0009] However, even in acoustic devices with the above configuration, if high water pressure is applied to the mesh sheet, there is a risk that water may seep into the waterproof space through the mesh sheet. Therefore, in this embodiment, the multiple openings include multiple first openings, and the mesh sheet is provided so as to be parallel to the direction of the water flow formed in the flow channel space by the water flowing into the flow channel space through the first openings. As a result, the water pressure of the water flow formed in the flow channel space by the water flowing into the flow channel space through the first openings does not act perpendicularly to the mesh sheet. As a result, it is possible to more reliably prevent malfunctions caused by water intrusion.

[0010] In the embodiments described later, the partition wall body is provided separately from the housing, but the partition wall body in this embodiment is not limited to this. The partition wall body may be formed integrally with the housing.

[0011] Furthermore, the multiple openings in this embodiment may include one or more small openings in addition to the first opening. This is because if the influence of one or more small openings on the water flow is small, water intrusion can be prevented.

[0012] In the second embodiment of the sound device, the plurality of openings does not include any openings other than the plurality of first openings.

[0013] According to this embodiment, it is possible to more reliably prevent malfunctions caused by water ingress.

[0014] In the third embodiment of the acoustic device, in the first or second embodiment, the first opening is configured such that water that passes through the first opening and exits from the outlet on the flow path space side of the first opening does not directly hit the mesh sheet.

[0015] According to this embodiment, it is possible to more reliably prevent malfunctions caused by water ingress.

[0016] In the fourth embodiment of the acoustic device, in any of the first to third embodiments, the partition wall body is provided with a water pressure reducing wall at a position where water flowing into the flow path space through the first opening collides with at least one of the plurality of first openings.

[0017] According to this embodiment, the water pressure of water flowing into the flow path space through at least one of the multiple first openings can be reduced. As a result, the prevention of malfunctions caused by water intrusion can be made even more reliable.

[0018] In the fifth embodiment of the acoustic device, in any of the first to fourth embodiments, the mesh sheet is joined to the surface of the partition body on the side of the flow path space at the edge of the communication hole.

[0019] According to this embodiment, it is possible to prevent water from accumulating inside the communication hole.

[0020] In the sixth embodiment of the acoustic device, in any of the first to fifth embodiments, the communication hole is a hole that penetrates the partition body in the front-to-back direction of the device.

[0021] According to this embodiment, it is easier to form a large communication hole.

[0022] In the embodiment described later, one communication hole is provided that penetrates the device in the front-to-back direction. However, this embodiment is not limited to this, and multiple communication holes that penetrate the device in the front-to-back direction may be provided.

[0023] In the seventh embodiment of the sound device, in the sixth embodiment, a part of the speaker is inserted into the communication hole.

[0024] According to this embodiment, the sound device can be made thinner.

[0025] In the eighth embodiment, the acoustic device, in the sixth or seventh embodiment, includes a plurality of extra-regional openings provided outside the region in which the communication holes are formed, as viewed from the front-to-back direction of the device, which is perpendicular to the mesh sheet.

[0026] According to this embodiment, it is possible to more reliably prevent malfunctions caused by water intrusion. This is because it is easy to direct water flowing into the flow channel space through an opening outside the region along the mesh sheet.

[0027] In the embodiments described later, the external opening is an opening provided in the side wall, but the external opening in this embodiment is not limited to this. The external opening may also be an opening provided in the rear wall.

[0028] In the ninth embodiment of the acoustic device, in the eighth embodiment, the plurality of extra-regional openings include side wall openings formed in the side wall of the housing.

[0029] According to this embodiment, it is possible to more reliably prevent malfunctions caused by water intrusion. This is because it is easy to direct water flowing into the flow channel space through the side wall opening along the mesh sheet.

[0030] In the embodiment described later, the side wall of the housing extends parallel to the axial direction of the speaker. However, the side wall of this embodiment is not limited to this and may extend in a direction inclined with respect to the axial direction of the speaker.

[0031] In the tenth embodiment of the acoustic device, the side wall opening is provided on the front side of the device, relative to the mesh sheet, as in the ninth embodiment.

[0032] According to this embodiment, the overall size of the device can be reduced in the front-to-back direction more easily compared to an embodiment in which the side wall opening is located further rearward than the mesh sheet.

[0033] In the eleventh embodiment of the sound device, in any of the first to tenth embodiments, the housing includes a front cover that holds the front end of the speaker, and the partition body is formed separately from the front cover.

[0034] According to this embodiment, since the partition wall body, which is formed separately from the front cover, has a communication hole, it is easier to form a smaller communication hole compared to an embodiment in which the member that holds the front end of the speaker and the member with the communication hole are integrated.

[0035] In the twelfth embodiment of the sound device, in any of the first to eleventh embodiments, the housing comprises a rear cover having a rear wall positioned behind the speaker, and the partition body is formed separately from the rear cover.

[0036] According to this embodiment, the degree of design freedom for the flow path space is greater compared to the embodiment in which the rear wall and the partition wall body are formed integrally.

[0037] According to this disclosure, in an acoustic device comprising a speaker and a housing that covers the speaker from the rear, it is possible to achieve good acoustic performance while preventing malfunctions caused by water ingress.

[0038] This is a schematic cross-sectional end view showing the acoustic device of this embodiment. This is a schematic cross-sectional end view showing an acoustic device with a rear wall opening added to the structure shown in Figure 1. This is a schematic cross-sectional end view showing a modified acoustic device.

[0039] Figure 1 is a schematic cross-sectional end view showing the acoustic device 10 of this embodiment.

[0040] The sound device 10 is, for example, headphones. Figure 1 shows only a portion of the headphones. The sound device 10 comprises a speaker 12, housings 20, 50, and partition members 30, 40.

[0041] The speaker 12 consists of a diaphragm, a voice coil, a magnetic circuit, and a frame that supports them. The speaker 12 generates sound by vibrating the diaphragm based on an electrical signal. In the following description, the axial direction of the speaker 12 coincides with the front-to-back direction of the acoustic device 10.

[0042] In part, the housings 20 and 50 cover the speaker 12 from the rear, forming a rear space 60 inside which is the space behind the speaker 12.

[0043] The housings 20 and 50 include a front cover 20 and a rear cover 50.

[0044] The front cover 20 covers the speaker 12 from the front side. The front cover 20 holds the front end portion of the speaker 12.

[0045] The front cover 20 includes a front wall 21 and side walls 22.

[0046] The front wall 21 has a plurality of through-holes 21a. The plurality of through-holes 21a are holes through which the sound generated by the speaker 12 passes.

[0047] The side walls 22 extend rearward from the outer edge portion of the front wall 21. The side walls 22 have joint portions 22a joined to the partition members 30 and 40 and the rear cover 50.

[0048] The rear cover 50 includes a rear wall 51 and side walls 52.

[0049] The rear wall 51 is oriented in the device front-rear direction in the thickness direction. The rear wall 51 is, for example, circular when viewed from the rear side. The rear wall 51 has a shape that covers the speaker 12 from the rear side.

[0050] The side walls 52 extend forward from the outer edge portion of the rear wall 51. The side walls 52 are oriented in the device radial direction in the thickness direction. The side walls 52 are, for example, in a cylindrical shape extending forward from the outer edge of the circular rear wall 51.

[0051] The side walls 52 have side wall openings 52a penetrating the side walls 52. The side wall openings 52a communicate the rear space 60 (flow path space 61 described later) with the outside of the device. The direction connecting the outlet on the outside of the device side and the outlet on the rear space side of the side wall opening 52a (the extending direction of the side wall opening 52a) is the device radial direction, which is the same direction as the thickness direction of the side walls 52. The device radial direction means a direction perpendicular to the central axis of the acoustic device 10.

[0052] A plurality of side wall openings 52a are provided. The plurality of side wall openings 52a are provided at intervals in the circumferential direction. The intervals in the circumferential direction at which the plurality of side wall openings 52a are provided are, for example, equal intervals. The number of side wall openings 52a is, for example, 8 or more, and more preferably 16 or more.

[0053] Hereafter, the side wall opening 52a may simply be referred to as the opening 52a.

[0054] The partition members 30 and 40 divide the rear space 60 into a flow channel space 61 and a waterproof space 62. The flow channel space 61 is the space within the rear space 60 that is connected to the outside of the housing through multiple openings 52a. The waterproof space 62 is the space within the rear space 60 that needs to be waterproofed.

[0055] The partition members 30 and 40 comprise a partition body 30 having a communication hole 31a that connects the waterproof space 62 and the flow channel space 61, and a mesh sheet 40 that closes the communication hole 31a.

[0056] The partition wall body 30 has a first wall 31 whose thickness direction is oriented in the front-to-back direction of the device. The first wall 31 has a communication hole 31a that penetrates the first wall 31. In other words, the communication hole 31a is a hole that penetrates the partition wall body 30 in the front-to-back direction of the device. The shape of the communication hole 31a is, for example, circular when viewed from the rear. A part of the speaker 12 (specifically a part of the magnetic circuit) is contained within the communication hole 31a.

[0057] The communication hole 31a is covered with a mesh sheet 40. The mesh sheet 40 is, for example, a mesh sheet that has been treated with a water-repellent coating. The mesh sheet 40 is provided so as to cover the communication hole 31a of the partition wall body 30. The outer edge of the mesh sheet 40 is joined to the rear side of the first wall 31 of the partition wall body 30. The thickness direction of the mesh sheet 40 is oriented in the front-rear direction. The mesh sheet 40 and the first wall 31 form a space between them and the rear wall 51 of the rear cover 50 that extends in a direction perpendicular to the front-rear direction of the device. This space constitutes part of the flow path space 61.

[0058] The partition wall body 30 has a second wall 32. The second wall 32 extends from the outer edge of the first wall 31 toward the front of the device. The second wall 32 is positioned where water entering from the side wall opening 52a of the rear cover 50 collides with it. The second wall 32 is sometimes called a water pressure reducing wall 32. The direction in which water enters the flow path space 61 from the outlet of the side wall opening 52a is radially inward, whereas the direction in which the outer surface of the second wall 32 faces is radially outward. The second wall 32 forms a space (part of the flow path space 61) that extends in the front-rear direction of the device between itself and the side wall 52.

[0059] The partition wall body 30 has a third wall 33. The third wall 33 extends radially outward from the front end of the second wall 32. The rear surface of the third wall 33 coincides with the front end of the side wall opening 52a in the front-rear direction.

[0060] The bulkhead body 30 has a fourth wall 34. The fourth wall 34 functions as a joint that connects to the joint 22a of the front cover 20. Specifically, the fourth wall 34 faces the joint 22a of the side wall 22 of the front cover 20 in the front-rear direction. The fourth wall 34 is also connected to the side wall 52 of the rear cover 50. The fourth wall 34 is located radially inward of the side wall 52 of the rear cover 50.

[0061] The side wall opening 52a is positioned so that water exiting the side wall opening 52a from the outlet on the flow path space 61 side does not directly hit the mesh sheet 40. Specifically, water exiting the side wall opening 52a from the outlet on the flow path space 61 side directly hits the second wall 32 of the partition wall body 30. This water then forms a water flow toward the rear of the device within the flow path space 61, then hits the rear wall 51 of the rear cover 50, flows perpendicular to the front-rear direction of the device, and flows parallel to the mesh sheet 40.

[0062] The portion of the rear cover 50 that overlaps with the communication hole 31a when viewed in the front-to-rear direction of the device prevents high water pressure from being directly applied to the mesh sheet 40. Therefore, as shown in Figure 1, it is preferable that no opening is provided in the region that overlaps with the communication hole 31a when viewed in the front-to-rear direction of the device.

[0063] However, as shown in Figure 2, an opening 51a (an opening provided in the rear wall 51) may be provided in the rear cover 50 in the area that overlaps with the communication hole 31a when viewed in the front-rear direction of the device. Depending on the size of the opening 51a, it is possible to sufficiently suppress water from entering through the mesh sheet 40. In this embodiment, since a side wall opening 52a is provided, acoustic performance can be ensured even if the size of the rear wall opening 51a is small.

[0064] Furthermore, although not shown in the illustration, if a rear wall opening 51a is provided in the rear wall 51, it is more preferable to provide it outside the area that overlaps with the communication hole 31a when viewed from the front-rear direction of the device.

[0065] <Effects> Next, the effects of this embodiment will be described.

[0066] In this embodiment, as shown in Figure 1, the sound device 10 comprises a speaker 12 and housings 20 and 50. The housings 20 and 50 cover the speaker 12 from the rear side, forming a rear space 60 inside which is the space behind the speaker 12.

[0067] However, if the rear space 60 inside the housings 20 and 50 is closed off, good acoustic performance cannot be achieved. Therefore, in this embodiment, the housings 20 and 50 are provided with a plurality of openings 52a that connect to the rear space 60.

[0068] However, if an opening 52a connected to the rear space 60 is provided in the housing, water may enter the rear space 60 through the opening 52a, potentially causing malfunctions. Possible malfunctions include corrosion of the magnetic circuit or terminal members of the speaker 12. Therefore, in this embodiment, the sound device 10 is equipped with partition members 30 and 40 that divide the rear space 60 into a flow channel space 61 connected to the outside of the housing by a plurality of openings 52a, and a waterproof space 62 which is a space to be waterproofed. The partition members 30 and 40 include a partition body 30 with a communication hole 31a that connects the waterproof space 62 and the flow channel space 61, and a mesh sheet 40 that closes the communication hole 31a. As a result, air on the rear side of the speaker 12 can flow out to the outside of the device through the waterproof space 62, the mesh sheet 40, the flow channel space 61, and the plurality of openings 52a. Furthermore, since the communication hole 31a is sealed with the mesh sheet 40, it is possible to prevent water from entering the waterproof space 62. Therefore, good acoustic performance can be achieved while preventing malfunctions caused by water intrusion.

[0069] However, even in the acoustic device 10 having the above configuration, if high water pressure is applied to the mesh sheet 40, there is a risk that water may seep into the waterproof space 62 through the mesh sheet 40. Therefore, in this embodiment, the plurality of openings 52a include a plurality of first openings 52a, and the mesh sheet 40 is provided so as to be parallel to the direction of the water flow formed in the flow channel space 61 by the water flowing into the flow channel space 61 through the first openings 52a. As a result, the water pressure of the water flow formed in the flow channel space 61 by the water flowing into the flow channel space 61 through the first openings 52a does not act perpendicularly to the mesh sheet 40. As a result, it is possible to more reliably prevent malfunctions caused by water intrusion.

[0070] Furthermore, in this embodiment, the multiple openings 52a do not include any openings other than the multiple first openings 52a. Therefore, it is possible to more reliably prevent malfunctions caused by water ingress.

[0071] Furthermore, in this embodiment, the first opening 52a is configured such that water that passes through the first opening 52a and exits from the outlet on the flow path side of the first opening 52a does not directly hit the mesh sheet 40. This makes it even more reliable to prevent malfunctions caused by water intrusion.

[0072] Furthermore, in this embodiment, the partition wall body 30 is provided with a water pressure reducing wall 32 located at a position where water flowing into the flow channel space 61 through the first opening 52a collides with at least one of the multiple first openings 52a. Therefore, the water pressure of the water flowing into the flow channel space 61 through the first opening 52a can be reduced for at least one of the multiple first openings 52a. As a result, the prevention of malfunctions caused by water intrusion can be made even more reliable.

[0073] Furthermore, in this embodiment, the mesh sheet 40 is joined to the surface of the partition wall body 30 on the side of the flow path space 61 at the edge of the communication hole 31a. This prevents water from accumulating inside the communication hole 31a.

[0074] Furthermore, in this embodiment, the communication hole 31a is a hole that penetrates the partition wall body 30 in the front-to-back direction of the device. Therefore, it is easy to make the communication hole 31a large.

[0075] Furthermore, in this embodiment, a portion of the speaker 12 is inserted into the communication hole 31a. This allows the sound device 10 to be made thinner.

[0076] Furthermore, in this embodiment, the multiple first openings 52a include multiple extra-region openings 52a located outside the region that overlaps with the communication holes 31a when viewed from the front-to-back direction of the device, which is perpendicular to the mesh sheet 40. This makes it even more reliable to prevent malfunctions caused by water ingress. This is because it is easy to direct water flowing into the flow path space 61 through the extra-region openings 52a along the mesh sheet.

[0077] Furthermore, in this embodiment, the multiple external openings 52a include side wall openings 52a formed in the side walls 52 of the housings 20 and 50. This makes it even more reliable to prevent malfunctions caused by water ingress. This is because it is easy to direct water flowing into the flow path space 61 through the side wall openings 52a along the mesh sheet 40.

[0078] Furthermore, in this embodiment, the side wall opening 52a is located on the front side of the device relative to the mesh sheet 40. Therefore, compared to an embodiment in which the side wall opening 52a is located on the rear side of the device relative to the mesh sheet 40, it is easier to miniaturize the entire device in the front-to-back direction.

[0079] Furthermore, in this embodiment, the housings 20 and 50 are equipped with a front cover 20 that holds the front end of the speaker 12, and the partition wall body 30 is formed separately from the front cover 20. Therefore, since the partition wall body 30, which is formed separately from the front cover 20, has a communication hole 31a, it is easier to form a smaller communication hole 31a compared to an embodiment in which the member that holds the front end of the speaker 12 and the member with the communication hole 31a are integrated.

[0080] Furthermore, in this embodiment, the housings 20 and 50 include a rear cover 50 having a rear wall 51 positioned behind the speaker 12, and the partition body 30 is formed separately from the rear cover 50. Therefore, compared to an embodiment in which the rear wall 51 and the partition body 30 are formed integrally, there is a greater degree of design freedom for the flow path space 61.

[0081] (Modified Version) Figure 3 is a schematic cross-section end view showing a modified acoustic device 110.

[0082] The sound device 110 comprises a speaker 12, housings 120 and 150, and partition members 130 and 140. The housings 120 and 150 comprise a front cover 120 and a rear cover 150. The partition members 130 and 140 comprise a partition body 130 and a mesh sheet 140. The rear cover 150 comprises a rear wall 151 and a side wall 152.

[0083] The housings 120 and 150 are provided with a number of openings 151a and 152a that connect to the flow path space 61.

[0084] The multiple openings 151a, 152a include multiple rear wall openings 151a. The rear wall openings 151a are provided in the rear wall 151 of the rear cover 150.

[0085] The multiple openings 151a, 152a include multiple side wall openings 152a. The side wall openings 152a are provided in the side wall 152 of the rear cover 150.

[0086] The partition wall body 130 has a first wall 131 whose thickness direction is oriented in the front-rear direction of the device. The first wall 131 covers the speaker 12 from the rear. The first wall 131 forms a space (part of the flow path space 61) between itself and the rear wall 151 that extends in a direction perpendicular to the front-rear direction of the device.

[0087] The partition wall body 130 has a second wall 132. The second wall 132 extends from the outer edge of the first wall 131 toward the front of the device. The second wall 132 has a cylindrical shape with its thickness direction oriented radially. The second wall 132 forms a space (part of the flow path space 61) that extends in the front-rear direction of the device between itself and the side wall 152.

[0088] The second wall 132 is provided with communication holes 132a that penetrate the second wall 132. Multiple communication holes 132a are provided at intervals in the circumferential direction. The number of communication holes 132a is not particularly limited, but for example, there are four or more, preferably eight or more, and more preferably sixteen or more. The mesh sheet 140 is provided so as to block the communication holes 132a. The mesh sheet 140 is joined to the radially outer surface of the second wall 132.

[0089] The bulkhead body 130 has an inclined wall 133. The inclined wall 133 is located in front of the second wall 132. The inclined wall 133 is positioned where water entering from the side wall opening 152a of the rear cover 150 will strike it. The inclined wall 133 is sometimes called a water pressure reducing wall 133. Of the inclined wall 133, the side facing the water entering from the side wall opening 152a of the rear cover 150 will strike it is inclined in a direction that tilts towards the rear as it moves radially inward. This guides the water entering from the side wall opening 152a towards the rear.

[0090] The bulkhead body 130 has a connecting wall 134. The connecting wall 134 extends forward from the inclined wall 133. The connecting wall 134 is joined to the front cover 20. The connecting wall 134 faces the front cover 120 in both the front-rear and radial directions. The connecting wall 134 is also joined to the side wall 152 of the rear cover 150. The connecting wall 134 is located radially inward of the side wall 152 of the rear cover 150.

[0091] The rear wall opening 151a is positioned so that water exiting the rear wall opening 151a from the outlet on the flow path space 61 side does not directly hit the mesh sheet 140. Specifically, water exiting the rear wall opening 151a from the outlet on the flow path space 61 side directly hits the first wall 131 of the partition wall body 130. The water then flows along the first wall 131 in a direction perpendicular to the front-rear direction of the device, then hits the side wall 152 of the rear cover 150, changes direction toward the front of the device, and flows parallel to the mesh sheet 140.

[0092] The side wall opening 152a is positioned so that water exiting the side wall opening 152a from the outlet on the flow path space 61 side does not directly hit the mesh sheet 140. Specifically, water exiting the side wall opening 152a from the outlet on the flow path space 61 side directly hits the inclined wall 133 of the partition wall body 130. This water then forms a water flow toward the rear of the device within the flow path space 61 and flows parallel to the mesh sheet 140 in that portion.

[0093] While preferred embodiments of this disclosure have been described above, this disclosure is not limited to the embodiments described above.

[0094] In the above embodiments and modifications, the flow path space 61 includes a space extending in a direction perpendicular to the front-rear direction of the device and a space extending from the outer edge of said space in the front-rear direction (forward direction) of the device. However, the flow path space of this disclosure is not limited to this and may consist only of a space extending in a direction perpendicular to the front-rear direction of the device.

[0095] 10 Acoustic device 12 Speaker 20, 50 Housing 20 Front cover 30, 40 Partition member 30 Partition body 31 First wall 31a Communication hole 32 Second wall (water pressure reducing wall) 40 Mesh sheet 50 Rear cover 51 Rear wall 51a Rear wall opening 52 Side wall 52a Side wall opening (first opening, outside area opening) 60 Rear space 61 Flow path space 62 Waterproof space 110 Acoustic device 120 Front cover 120, 150 Housing 130, 140 Partition member 130 Partition body 131 First wall 132 Second wall 132a Communication hole 133 Inclined wall (water pressure reducing wall) 140 Mesh sheet 150 Rear cover 151 Rear wall 151a Rear wall opening (first opening) 152 Side wall 152a Side wall opening (first opening)

Claims

1. An acoustic device comprising: a speaker; a housing that covers the speaker from the rear and forms a rear space inside which is the space behind the speaker, and is provided with a plurality of openings connected to the rear space; a partition member that divides the rear space into a flow space connected to the outside of the housing by the plurality of openings and a waterproof space which is a space to be waterproofed; wherein the partition member comprises a partition body provided with a communication hole that connects the waterproof space and the flow space; and a mesh sheet that closes the communication hole; wherein the plurality of openings include a plurality of first openings; and the mesh sheet is provided so as to be parallel to the direction of the water flow formed in the flow space by water flowing into the flow space through the first openings.

2. The acoustic device according to claim 1, wherein the plurality of openings does not include any openings other than the plurality of first openings.

3. The acoustic device according to claim 1, wherein the first opening is configured such that water exiting from the outlet on the flow path space side of the first opening through the first opening does not directly hit the mesh sheet.

4. The acoustic device according to claim 1, wherein the partition wall body is provided with a water pressure reducing wall at a position where water flowing into the flow channel space through the first opening collides with at least one of the plurality of first openings.

5. The acoustic device according to claim 1, wherein the mesh sheet is joined to the surface of the partition wall body on the side of the flow path space at the edge of the communication hole.

6. The acoustic device according to any one of claims 1 to 4, wherein the communication hole is a hole that penetrates the partition wall body in the front-rear direction of the device.

7. The sound device according to claim 6, wherein a part of the speaker is inserted into the communication hole.

8. The acoustic device according to claim 6, wherein the plurality of first openings include a plurality of extra-region openings provided outside the region in which the communication holes are formed, as viewed from the front-to-back direction of the device which is perpendicular to the mesh sheet.

9. The acoustic device according to claim 8, wherein the plurality of external openings include side wall openings formed in the side wall of the housing.

10. The acoustic device according to claim 9, wherein the side wall opening is provided on the front side of the device than the mesh sheet.

11. The acoustic device according to claim 1, wherein the housing comprises a front cover that holds the front end of the speaker, and the partition body is formed separately from the front cover.

12. The acoustic device according to claim 1, wherein the housing comprises a rear cover having a rear wall positioned behind the speaker, and the partition body is formed separately from the rear cover.

Images