Microphone module

Abstract

The invention relates to a microphone module. The microphone module comprises a shell, a microphone, a drainage structure and a waterproof film, the microphone is arranged in the shell. The drainage structure is arranged on the shell. The drainage structure comprises a first channel and a second channel which are communicated with each other. A first sound hole and a drain hole of the first channel are exposed out of the shell, and a second sound hole of the second channel corresponds to the microphone. A first normal of the first sound hole is perpendicular to a second normal of the second sound hole. The waterproof film is arranged on the shell and located between the microphone and the second sound hole.

Description

TECHNICAL FIELD

[0001] The present application relates to a microphone module. BACKGROUND

[0002] A microphone module can be arranged outside an object to receive sound. The microphone module includes a sound hole and a microphone. Sound waves in an external environment pass through the sound hole into the microphone module and are transmitted to the microphone. Water flow and dust in the external environment also pass through the sound hole into the microphone module, affecting the sound receiving effect of the microphone. Specifically, the drainage effect of the microphone module is not good today. When a high-temperature and high-pressure water column enters the microphone module, the water column will impact the microphone, causing the microphone to be damaged, resulting in failure of the microphone module. SUMMARY

[0003] Therefore, the present application provides a microphone module that can protect the microphone.

[0004] The microphone module of the present application includes a housing, a microphone, a drainage structure, and a waterproof film. The microphone is arranged in the housing. The drainage structure is arranged in the housing. The drainage structure includes a first channel and a second channel in communication. A first sound hole and a drainage hole of the first channel are exposed to the housing, and a second sound hole of the second channel corresponds to the microphone. A first normal line of the first sound hole is perpendicular to a second normal line of the second sound hole. The waterproof film is arranged in the housing and located between the microphone and the second sound hole.

[0005] Based on the above, the second sound hole of the second channel of the microphone module of the present application corresponds to the microphone, and is staggered with the first sound hole of the first channel. The microphone module can guide the external water column and dust to leave the drainage hole through the first channel to protect the microphone.

[0006] In one embodiment, the first channel includes a first portion and a second portion connected thereto, the first portion extends along a first extension axis, the second portion extends along a second extension axis, the first portion is in communication with the first sound hole and the second channel, the second portion is in communication with the drainage hole, and the first extension axis and the second extension axis have an included angle therebetween.

[0007] In one embodiment, the first portion intersects the second channel at a first connection end, the first portion intersects the second portion at a second connection end, the first connection end and the second connection end are spaced apart by a distance, and the distance is greater than or equal to 3 mm.

[0008] In one embodiment, the length of the first portion along the first extension axis and the length of the second portion along the second extension axis are less than or equal to 17 mm.

[0009] In one embodiment, the first extension axis coincides with the first normal line.

[0010] In one of the embodiments, the included angle is greater than 90 degrees and less than or equal to 180 degrees.

[0011] In one of the embodiments, the width of the second portion in a direction perpendicular to the second extending axis varies along the second extending axis.

[0012] In one of the embodiments, wherein the second passage extends along a third extending axis, an angle between the third extending axis and the first normal is less than or equal to 90 degrees.

[0013] In one of the embodiments, the second normal is different from the third extending axis, and an included angle between the second normal and the third extending axis is less than 90 degrees.

[0014] In one of the embodiments, the width of the second passage in a direction perpendicular to the third extending axis varies along the third extending axis.

[0015] In one of the embodiments, wherein the housing comprises a first outer surface and a second outer surface connected, the first sound hole is located on the first outer surface, and the drain hole is located on the second outer surface.

[0016] In one of the embodiments, wherein the first sound hole comprises a plurality of first sub-sound holes, each of the first sub-sound holes has a hole diameter between 0.2 mm and 1 mm and a hole depth between 0.5 mm and 1 mm.

[0017] In one of the embodiments, wherein the second sound hole comprises a plurality of second sub-sound holes, each of the second sub-sound holes has a hole diameter between 0.2 mm and 1 mm and a hole depth between 0.5 mm and 1 mm.

[0018] In one of the embodiments, wherein the first passage extends along the first normal, the drain hole is located on the first normal.

[0019] In one of the embodiments, wherein the housing comprises a first outer surface and a third outer surface opposite, the first sound hole is located on the first outer surface, and the drain hole is located on the third outer surface.

[0020] In one of the embodiments, further comprising a circuit board disposed in the housing and located between the waterproof film and the microphone, the circuit board comprises an opening corresponding to the second sound hole, and the microphone is connected to the circuit board and covers the opening.

[0021] In one of the embodiments, further comprising a circuit board disposed in the housing and a wiring assembly at least partially disposed in the housing.

[0022] In one embodiment, the housing includes a first housing and a second housing connected together, the second housing and the first housing forming a cavity, the drainage structure and the waterproof membrane being embedded in the first housing, and the microphone being located in the cavity.

[0023] In one embodiment, the first channel includes a first portion and a plurality of second portions, the second portions intersecting the first portion at a second connection end, and the drain hole includes a plurality of sub-drain holes, the second portions being respectively connected to the sub-drain holes. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a cross-sectional view of a microphone module according to an embodiment of the present invention.

[0026] Figure 2 yes Figure 1 Rear view of the microphone module.

[0027] Figure 3 yes Figure 1 Top view of the microphone module.

[0028] Figure 4 This is a cross-sectional view of a microphone module according to another embodiment of the present invention.

[0029] Figure 5 yes Figure 4 Top view of the microphone module.

[0030] Figure 6 This is a cross-sectional view of a microphone module according to another embodiment of the present invention.

[0031] Figure 7 This is a cross-sectional view of a microphone module according to another embodiment of the present invention.

[0032] Figure 8 This is a cross-sectional view of a microphone module according to another embodiment of the present invention.

[0033] Figure 9 This is a cross-sectional view of a microphone module according to another embodiment of the present invention.

[0034] Figure label:

[0035] A1, A3: Angle

[0036] A2: angle

[0037] C: center

[0038] D1: distance

[0039] D2, D3: length

[0040] H1, H2: hole diameter

[0041] L1: first extension axis

[0042] L2: second extension axis

[0043] L3: third extension axis

[0044] N1: first normal line

[0045] N2: second normal line

[0046] P: cavity

[0047] S1: first outer surface

[0048] S2: second outer surface

[0049] S3: third outer surface

[0050] W1, W2: hole depth

[0051] X-Y-Z: rectangular coordinate

[0052] 100, 100a, 100b, 100c, 100d, 100e: microphone module

[0053] 110, 110d: housing

[0054] 111: first housing

[0055] 112: second housing

[0056] 120: microphone

[0057] 130, 130b, 130c, 130d, 130e: drainage structure

[0058] 131, 131d, 131e: first channel

[0059] 132, 132b, 132c: second channel

[0060] 1321: wall surface

[0061] 133, 133a: first sound hole

[0062] 1331: first sub sound hole

[0063] 134, 134c, 134d, 134e: drain hole

[0064] 1341: sub-drain hole

[0065] 135: first portion

[0066] 136, 136c, 136d, 136e: second portion

[0067] 137: second connecting end

[0068] 138, 138a, 138c: second sound hole

[0069] 1381: second sub-sound hole

[0070] 139: first connecting end

[0071] 140: waterproof film

[0072] 150: circuit board

[0073] 151: opening

[0074] 160: circuit assembly DETAILED DESCRIPTION

[0075] Figure 1 is a cross-sectional view of a microphone module according to an embodiment of the present application. Figure 2 is a rear view of the microphone module of Figure 1 Figure 3 is a top view of the microphone module of Figure 1 is a top view of the microphone module of Figures 1 to 3 , the microphone module 100 includes a housing 110, a microphone 120, a drain structure 130, and a waterproof film 140. The microphone 120 is disposed in the housing 110. The drain structure 130 is disposed in the housing 110 and includes a first passage 131 and a second passage 132 in communication. A first sound hole 133 and a drain hole 134 of the first passage 131 are exposed to the housing 110. A second sound hole 138 of the second passage 132 corresponds to the microphone 120. The waterproof film 140 is disposed in the housing 110 and between the microphone 120 and the second sound hole 138 to protect the microphone 120.

[0076] ​A first normal line N1 of the first sound hole 133 is perpendicular to a second normal line N2 of the second sound hole 138, so that the first sound hole 133 and the second sound hole 138 are staggered with each other. The first normal line N1 is parallel to the Z axis, and the second normal line N2 is parallel to the X axis. The first sound hole 133 and the drain hole 134 are in communication with the external environment. Sound waves in the external environment enter the microphone module 100 from the first sound hole 133 and are transmitted to the second sound hole 138 through the drain structure 130, and then transmitted to the microphone 120. Rain or dust in the external environment can also enter the microphone module 100 through the first sound hole 133. Since the first sound hole 133 and the second sound hole 138 are staggered with each other, when the external water column and dust enter the microphone module 100, the water column and the dust move along the first channel 131 and exit the microphone module 100 from the drain hole 134, without affecting the microphone 120, so that the microphone module 100 maintains good sound quality. Through the drain structure 130, the microphone module 100 of the present embodiment can achieve the highest waterproof and dustproof level IP69K.

[0077] As shown in Figure 1 and Figure 2 The microphone module 100 further includes a circuit board 150 and a wiring assembly 160. The housing 110 includes a first housing 111 and a second housing 112 connected together. The first housing 111 and the second housing 112 can be made of plastic, but are not limited thereto. The second housing 112 cooperates with the first housing 111 to form a cavity P, and the microphone 120 is located in the cavity P. The first housing 111 of the housing 110 includes a first outer surface S1 and a second outer surface S2 connected together. The first sound hole 133 is located on the first outer surface S1, and the drain hole 134 is located on the second outer surface S2, but is not limited thereto. The drain structure 130 and the waterproof film 140 are embedded in the first housing 111. The circuit board 150 is disposed in the cavity P of the housing 110 and located between the waterproof film 140 and the microphone 120. The circuit board 150 includes an opening 151 corresponding to the second sound hole 138, and the microphone 120 is connected to the circuit board 150 and covers the opening 151. The opening 151 has an aperture greater than or equal to 0.6 mm. The wiring assembly 160 is at least partially disposed in the cavity P of the housing 110.

[0078] The first channel 131 of the drainage structure 130 includes a first portion 135 and a second portion 136 connected together. The first portion 135 connects the first sound hole 133 and the second channel 132, and extends along a first extension axis L1. The first portion 135 intersects the second channel 132 at a first connecting end 139, and intersects the second portion 136 at a second connecting end 137. The second portion 136 connects the drain hole 134, and extends along a second extension axis L2. The first sound hole 133 and the second connecting end 137 connect the opposite ends of the first channel 131. The second connecting end 137 and the drain hole 134 connect the opposite ends of the second channel 132. In this embodiment, the first extension axis L1 coincides with the first normal N1 and is parallel to the Z-axis, and the second extension axis L2 is different from the first extension axis L1, but is not limited thereto. There is an included angle A1 between the first extension axis L1 and the second extension axis L2. The included angle A1 is greater than 90 degrees and less than 180 degrees. The included angle A1 is an obtuse angle.

[0079] like Figure 1 As shown, the second channel 132 extends along a third extension axis L3. The third extension axis L3 and the first normal N1 have an angle A2, which can be greater than zero degrees and less than or equal to 90 degrees. The first connecting end 139 and the second tone hole 138 connect the opposite ends of the second channel 132. In this embodiment, the third extension axis L3 coincides with the second normal N2 of the second tone hole 138 and is parallel to the X-axis, but this is not a limitation. That is, the included angle between the second normal N2 and the third extension axis L3 is equal to zero degrees. The angle A2 between the third extension axis L3 (second normal N2) and the first normal N1 is equal to 90 degrees.

[0080] The first connecting end 139 and the second connecting end 137 are spaced apart by a distance D1, which is greater than or equal to 3 mm. Specifically, a center C of the first connecting end 139 is spaced apart from the second connecting end 137 by a distance D1, and the center C is located on the third extension axis L3. That is, the third extension axis L3 is spaced apart from the second connecting end 137 by a distance D1. When an external high-pressure water jet enters the first part 135 from the first sound hole 133 and impacts a wall 1321 of the second part 136, the distance D1 prevents water from flowing back into the second channel 132, thus protecting the microphone 120.

[0081] The combined length D2 of the first portion 135 along the first extension axis L1 and the length D3 of the second portion 136 along the second extension axis L2 are less than or equal to 17 mm to avoid generating a standing wave resonance frequency that could affect the sound reception quality of the microphone module 100. The width of the second channel 132 perpendicular to the third extension axis L3 is between 2 mm and 4 mm to prevent water from splashing into the second channel 132. Figure 2 and Figure 3The first sound hole 133 and the drain hole 134 can have a rectangular shape as shown, but are not limited thereto. The width of the first sound hole 133 is preferably between 0.4 mm and 2 mm to avoid too large dust or stones from entering the microphone module 100 through the first sound hole 133. In an embodiment not shown, the first sound hole 133, the drain hole 134 and the second sound hole 138 can have a circular shape or any polygonal shape.

[0082] Figure 4 is a cross-sectional view of a microphone module according to another embodiment of the present application. Figure 5 is Figure 4 is a top view of the microphone module of Figure 1 , Figure 4 and Figure 5 The microphone module 100a of the present embodiment is similar to the aforementioned embodiments, except that the first sound hole 133a includes a plurality of first sub sound holes 1331 and the second sound hole 138a includes a plurality of second sub sound holes 1381. Each first sub sound hole 1331 has a hole diameter H1 (i.e. the width of the first sub sound hole 1331 along a direction perpendicular to the first normal line N1) between 0.2 mm and 1 mm and a hole depth W1 (i.e. the length of the first sub sound hole 1331 along the first normal line N1) between 0.5 mm and 1 mm. Each second sub sound hole 1381 has a hole diameter H2 (i.e. the width of the second sub sound hole 1381 along a direction perpendicular to the second normal line N2) between 0.2 mm and 1 mm and a hole depth W2 (i.e. the length of the second sub sound hole 1381 along the second normal line N2) between 0.5 mm and 1 mm. Thus, when an external water column passes through the first sound hole 133a and the second sound hole 138a, the impact of the water column can be reduced by the first sub sound holes 1331 and the second sub sound holes 1381 to protect the microphone 120. The microphone module 100a of the present embodiment has the same functions as the aforementioned embodiments, which will not be repeated here.

[0083] Figure 6 is a cross-sectional view of a microphone module according to another embodiment of the present application. Please refer to Figure 1 and Figure 6The microphone module 100b of the present embodiment is similar to the aforementioned embodiments, with the difference being that the second normal line N2 of the second sound hole 138 of the present embodiment is different from the third extension axis L3 of the second passage 132b. The included angle A3 between the second normal line N2 and the third extension axis L3 is greater than zero degrees and less than 90 degrees. The angle A2 between the third extension axis L3 and the first normal line N1 is greater than zero degrees and less than 90 degrees, and the angle A2 is an acute angle. In this way, when an external water column enters the drainage structure 130b, the water column can be further prevented from flowing from the second passage 132b into the second sound hole 138 and damaging the microphone 120. The microphone module 100b of the present embodiment has the same functions as the aforementioned embodiments, and thus further elaboration is omitted here.

[0084] Figure 7 is a cross-sectional view of a microphone module according to another embodiment of the present application. Please refer to Figure 1 and Figure 7 The microphone module 100c of the present embodiment is similar to the aforementioned embodiments, with the difference being that the width of the second portion 136c of the drainage structure 130c in a direction perpendicular to the second extension axis L2 varies along the second extension axis L2. The width of the second passage 132c in a direction perpendicular to the third extension axis L3 varies along the third extension axis L3. Specifically, the width of the second portion 136c gradually expands along the second extension axis L2 from the second connecting end 137 toward the drainage hole 134c, and the width of the second connecting end 137 is less than the width of the drainage hole 134c. The width of the second passage 132c gradually expands along the third extension axis L3 from the first connecting end 139 toward the second sound hole 138c, and the width of the first connecting end 139 is less than the width of the second sound hole 138c. In an embodiment not shown, the width of the second portion 136c can gradually expand along the third extension axis L3 from the second sound hole toward the first connecting end 139, and the width of the second sound hole is less than the width of the first connecting end 139. The microphone module 100c of the present embodiment has the same functions as the aforementioned embodiments, and thus further elaboration is omitted here.

[0085] Figure 8 is a cross-sectional view of a microphone module according to another embodiment of the present application. Please refer to Figure 1 and Figure 8The microphone module 100d of the present embodiment is similar to the aforementioned embodiments, with the difference that the first channel 131d of the drainage structure 130d of the present embodiment extends along the first normal line N1 of the first sound hole 133, and the drainage hole 134d is located on the first normal line N1. In other words, the first normal line N1, the first extension axis L1 and the second extension axis L2 coincide with each other. The included angle between the first extension axis L1 and the second extension axis L2 is equal to 180 degrees. The first housing 111d of the housing 110d further comprises a third outer surface S3, the third outer surface S3 is connected between the first outer surface S1 and the second outer surface S2 relative to the first outer surface S1. The first sound hole 133 is located on the first outer surface S1, and the drainage hole 134d is located on the third outer surface S3. The microphone module 100d of the present embodiment has the same function as the aforementioned embodiments, and will not be described here.

[0086] Figure 9 is a cross-sectional view of a microphone module according to another embodiment of the present application. Please refer to Figure 2 and Figure 9 The microphone module 100e of the present embodiment is similar to the aforementioned embodiments, with the difference that the first channel 131e of the drainage structure 130e of the present embodiment comprises a plurality of second portions 136e. The drainage hole 134e comprises a plurality of sub-drainage holes 1341. These second portions 136e intersect the first portion 135 at the second connection end 137, and are respectively connected to these sub-drainage holes 1341. The number of sub-drainage holes 1341 is, for example, three, and the number of second portions 136e is, for example, three, but is not limited thereto. The length of each second portion 136e and the first portion 135 is 17 mm. The microphone module 100e of the present embodiment has the same function as the aforementioned embodiments, and will not be described here.

[0087] The arrangement of the drainage structure 130, 130b, 130c, 130d, 130e of the microphone module 100, 100a, 100b, 100c, 100d, 100e is not limited to the above embodiments. The structure of the first sound hole 133, 133a, the second sound hole 138, 138a, the second channel 132, 132b, 132c and the second portion 136, 136c, 136d, 136e can be any combination of any of the above embodiments.

[0088] In summary, the second sound hole of the second channel of the microphone module of the present application corresponds to the microphone, and is staggered with the first sound hole of the first channel. The microphone module can guide the external water column and dust away from the drainage hole through the first channel, so as to protect the microphone.

[0089] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as the combination of the technical features does not exist in contradiction, it shall be considered within the scope of the present disclosure.

[0090] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the patent application scope. It shall be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent shall be subject to the appended claims.

Claims

1. A microphone module, characterized by, Comprising: a housing; a microphone disposed in the housing; a drainage structure disposed in the housing, the drainage structure comprising a first passage and a second passage in communication, a first sound hole and a drainage hole of the first passage exposed to the housing, a second sound hole of the second passage corresponding to the microphone, a first normal line of the first sound hole perpendicular to a second normal line of the second sound hole; and a waterproof membrane disposed in the housing and located between the microphone and the second sound hole.

2. The microphone module of claim 1, wherein, Wherein the first passage comprises a first portion and a second portion connected in series, the first portion extends along a first extension axis, the second portion extends along a second extension axis, the first portion is connected to the first sound hole and the second passage, the second portion is connected to the drainage hole, the first extension axis and the second extension axis have an included angle.

3. The microphone module of claim 2, wherein, Wherein the first portion intersects the second passage at a first connection end, the first portion intersects the second portion at a second connection end, the first connection end and the second connection end are spaced apart by a distance, the distance is greater than or equal to 3mm.

4. The microphone module of claim 2, wherein, The length of the first portion along the first extension axis and the length of the second portion along the second extension axis are less than or equal to 17mm.

5. The microphone module of claim 2, wherein, The first extension axis coincides with the first normal line.

6. The microphone module of claim 2, wherein, The included angle is greater than 90 degrees and less than or equal to 180 degrees.

7. The microphone module of claim 2, wherein, The width of the second portion perpendicular to the second extension axis varies along the second extension axis.

8. The microphone module of claim 1, wherein, Wherein the second passage extends along a third extension axis, the third extension axis and the first normal line have an angle, the angle is less than or equal to 90 degrees.

9. The microphone module of claim 8, wherein, The second normal line is different from the third extension axis, and the included angle between the second normal line and the third extension axis is less than 90 degrees.

10. The microphone module of claim 8, wherein, The width of the second passage perpendicular to the third extension axis varies along the third extension axis.

11. The microphone module of claim 1, wherein, Wherein the housing comprises a first outer surface and a second outer surface connected in series, the first sound hole is located on the first outer surface, and the drainage hole is located on the second outer surface.

12. The microphone module of claim 1, wherein, Wherein the first sound hole comprises a plurality of first sub-sound holes, each of the first sub-sound holes has a hole diameter of 0.2mm to 1mm and a hole depth of 0.5mm to 1mm.

13. The microphone module of claim 1, wherein, Wherein the second sound hole comprises a plurality of second sub-sound holes, each of the second sub-sound holes has a hole diameter of 0.2mm to 1mm and a hole depth of 0.5mm to 1mm.

14. The microphone module of claim 1, wherein, Wherein the first passage extends along the first normal line, and the drainage hole is located on the first normal line.

15. The microphone module of claim 1, wherein, Wherein the housing comprises a first outer surface and a third outer surface opposite to each other, the first sound hole is located on the first outer surface, and the drainage hole is located on the third outer surface.

16. The microphone module of claim 1, wherein, Further comprising a circuit board disposed in the housing and located between the waterproof membrane and the microphone, the circuit board comprises an opening corresponding to the second sound hole, and the microphone is connected to the circuit board and covers the opening.

17. The microphone module of claim 1, wherein, Further comprising a circuit board and a wiring assembly, the circuit board is disposed in the housing, and the wiring assembly is at least partially disposed in the housing.

18. The microphone module of claim 1, wherein, The shell comprises a first shell and a second shell connected to each other, the second shell and the first shell jointly form a cavity, the waterproof membrane and the drainage structure are embedded in the first shell, and the microphone is located in the cavity.

19. The microphone module of claim 1, wherein, The first channel comprises a first part and a plurality of second parts, the second parts intersect with the first part at a second connection end, the drainage hole comprises a plurality of sub-drainage holes, and the second parts are respectively connected to the sub-drainage holes.

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