Pickup microphone assembly and audio acquisition device

Abstract

The utility model relates to a pickup microphone assembly and audio acquisition equipment. Based on the pickup microphone assembly, the microphone assembly of the pickup microphone assembly can comprise the first directional microphone and the second directional microphone, and the pickup directions of the first directional microphone and the second directional microphone are opposite, so that any sound source in the environment where the pickup microphone assembly is located can be used as a sound source. The pickup distance of the first directional microphone and the pickup distance of the second directional microphone are different, so that the signal quality of the audio signal can be improved by utilizing the audio acquisition results of the first directional microphone and the second directional microphone at the differentiated pickup distances respectively. Moreover, the pickup microphone assembly can be adjustably arranged on the equipment base of the audio acquisition equipment, so that the pose of the pickup microphone assembly relative to the equipment base can be adjusted, and the directional adjustment of the directional microphone can be realized.

Description

Technical Field

[0001] The present application relates to audio acquisition technology, and in particular to a pickup microphone assembly and an audio acquisition device. Background Art

[0002] The sound pickup microphone assembly generally includes a microphone housing and a microphone arranged at a sound-transmitting opening of the microphone housing. Thus, the sound pickup microphone assembly can use the microphone to collect audio signals generated by sound sources in the environment.

[0003] However, the sound pickup microphone assembly usually adopts a single microphone configuration, and the signal quality of the audio signal collected by using only a single microphone is not high.

[0004] Therefore, how to improve the signal quality of the audio signal collected by the sound pickup microphone assembly has become a technical problem to be solved. Summary of the Invention

[0005] The embodiments of the present application provide a sound pickup microphone assembly and an audio acquisition device, which help to improve the signal quality of the audio signal collected by the sound pickup microphone assembly.

[0006] In an embodiment of the present application, a pickup microphone assembly is provided, comprising:

[0007] A microphone housing having a first cavity, wherein the first cavity is in communication with the outside world;

[0008] A microphone assembly includes a first directional microphone and a second directional microphone. The first directional microphone and the second directional microphone are both fixedly installed in the first barrel cavity, and the first directional microphone and the second directional microphone have opposite sound pickup directions.

[0009] In some examples, optionally, the first directional microphone and the second directional microphone are coaxially arranged adjacent to each other in the length direction of the microphone, and the sound pickup directions of the first directional microphone and the second directional microphone are opposite to each other in the length direction of the microphone.

[0010] In some examples, optionally, the first barrel cavity extends to the first barrel end of the microphone shell in the length direction of the microphone, the first barrel cavity has an end opening at the first barrel end, and the first barrel cavity is connected to the outside through the end opening; the first directional microphone and the second directional microphone are both located at the first barrel end, the second directional microphone is located on the side of the first directional microphone facing away from the end opening in the length direction of the microphone, the sound pickup direction of the first directional microphone is toward the end opening in the length direction of the microphone, and the sound pickup direction of the second directional microphone is away from the end opening along the length direction of the microphone.

[0011] In some examples, optionally, the shell wall of the microphone shell has a shell grid hole, and the first shell cavity is also connected to the outside through the shell grid hole.

[0012] In some examples, optionally, the first directional microphone is embedded in a first microphone flexible bushing, and the first microphone flexible bushing is hung on the wall of the microphone shell at the first barrel end, so that the first directional microphone is fixedly installed in the first barrel cavity at the first barrel end;

[0013] The second directional microphone is embedded in the second microphone flexible bushing, and the second microphone flexible bushing is snap-mounted on the microphone rigid bracket. In addition, the microphone rigid bracket is fixedly connected to the tube wall of the microphone shell at the first tube end by using a connecting piece, so that the second directional microphone is fixedly mounted in the first tube cavity at the first tube end.

[0014] In some examples, optionally, the first microphone flexible bushing includes an annular sleeve and at least two hanging ear plates, at least two of the hanging ear plates are distributed on the outside of the annular sleeve in the radial direction, and each of the hanging ear plates is connected to the annular sleeve through a corresponding connecting cantilever; the first directional microphone is embedded in the annular sleeve, and the axial sound pickup end face of the first directional microphone is exposed through the end face opening of the annular sleeve; the cylinder wall of the microphone shell has at least two intra-cavity suspension columns facing the inner side of the first cylinder cavity, at least two of the intra-cavity suspension columns protrude along the length direction of the microphone toward the end opening, and at least two of the hanging ear plates are respectively hung on at least two of the intra-cavity suspension columns, so that the first directional microphone is fixedly installed in the first cylinder cavity at the first cylinder end with its axial sound pickup end face facing the end opening.

[0015] In some examples, optionally, the connecting cantilever connected between each of the hanging ear plates and the annular sleeve includes a pair of ribs that expand from the hanging ear plate to the annular sleeve at a preset angle.

[0016] In some examples, optionally, the opening edge of the end face opening of the annular sleeve further has an end face flange, and the end face flange implements axial limitation on the first directional microphone in the annular sleeve in the axial direction.

[0017] In some examples, optionally, the microphone rigid bracket includes an annular support plate, an arc-shaped enclosure plate and a connecting rib plate, the arc-shaped enclosure plate protrudes from the edge of the annular support plate along the axial direction of the annular support plate, and the connecting rib plate is fixedly connected to at least one of the annular support plate and the arc-shaped enclosure plate; the second directional microphone is fixed to the annular support plate by utilizing the limiting cooperation between the second microphone flexible bushing and the arc-shaped enclosure plate, and the axial sound pickup end face of the second directional microphone is exposed through the end face opening of the second microphone flexible bushing and the annular opening of the annular support plate; the connecting rib plate is fixedly connected to the cylinder wall of the microphone cylinder shell by utilizing the connecting piece, so that the second directional microphone is fixedly installed in the first cylinder cavity at the first cylinder end with the axial sound pickup end face facing away from the end opening.

[0018] In some examples, optionally, the arc-shaped enclosure has an enclosure buckle, and the limiting cooperation between the second microphone flexible bushing and the arc-shaped enclosure includes: the enclosure buckle generates a clamping limit on the second microphone flexible bushing in the axial direction of the annular support plate.

[0019] In some examples, optionally, the inner surface of the arc-shaped enclosure plate in the radial direction of the annular support plate has an enclosure plate rib, and the limiting cooperation between the second microphone flexible bushing and the arc-shaped enclosure plate includes: the enclosure plate rib generates interference limitation on the second microphone flexible bushing in the radial direction of the annular support plate.

[0020] In some examples, optionally, the second directional microphone is located on a side of the annular support plate facing the first directional microphone in the axial direction, and the connecting rib is located on a side of the annular support plate facing away from the first directional microphone in the axial direction.

[0021] In some examples, optionally, the outer surface of the arc-shaped enclosure plate in the radial direction of the annular support plate has enclosure plate ribs, and wire passages are reserved between the enclosure plate ribs. An audio acquisition board is also installed in the first cylinder cavity, and the wire passages are used to deploy signal cables between the first directional microphone, the second directional microphone and the audio acquisition board.

[0022] In another embodiment of the present application, an audio acquisition device is provided, comprising a device base and a sound pickup microphone assembly as described in the aforementioned embodiment, wherein the sound pickup microphone assembly is mounted on the device base, and the position of the sound pickup microphone assembly relative to the device base is adjustable.

[0023] Based on the above-mentioned embodiments of the present application, the microphone assembly of the sound pickup microphone assembly may include a first directional microphone and a second directional microphone, and the sound pickup directions of the first directional microphone and the second directional microphone are opposite. Therefore, for any sound source in the environment where the sound pickup microphone assembly is located, the sound pickup distances of the first directional microphone and the second directional microphone are different. Therefore, the signal quality of the audio signal can be improved by utilizing the audio collection results of the first directional microphone and the second directional microphone with differentiated sound pickup distances. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following drawings are only provided for schematic illustration and explanation of the present application and do not limit the scope of the present application:

[0025] Figure 1 This is a schematic diagram of an exemplary structure of an audio acquisition device in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of the three-dimensional structure of a sound pickup microphone assembly used in an audio acquisition device in an embodiment of the present application;

[0027] Figure 3 A bottom view of a pickup microphone assembly used in an audio acquisition device according to an embodiment of the present application;

[0028] Figure 4 This is a front projection schematic diagram of a first microphone flexible bushing for mounting a first directional microphone in a sound pickup microphone assembly according to an embodiment of the present application;

[0029] Figure 5 A side cross-sectional view of a first microphone flexible bushing for mounting a first directional microphone on a sound pickup microphone assembly according to an embodiment of the present application;

[0030] Figure 6 This is a schematic diagram of a first three-dimensional structure of a microphone rigid bracket for mounting a second directional microphone on a sound pickup microphone assembly in an embodiment of the present application;

[0031] Figure 7 This is a schematic diagram of a second three-dimensional structure of a microphone rigid bracket for mounting a second directional microphone on a sound pickup microphone assembly in an embodiment of the present application;

[0032] Figure 8 This is a schematic diagram of the orthographic structure of a microphone rigid bracket for mounting a second directional microphone on a sound pickup microphone assembly in an embodiment of the present application;

[0033] Figure 9 This is a schematic diagram of the partial assembly structure of the second directional microphone and the microphone rigid bracket of the sound pickup microphone assembly in an embodiment of the present application.

[0034] Reference numerals

[0035] 10 Equipment base

[0036] 20 Connector Assembly

[0037] 21 Connectors

[0038] 22 adapter

[0039] 23 pivot bracket

[0040] 30 Pickup Microphone Assembly

[0041] 31 First Directional Microphone

[0042] 32 Second directional microphone

[0043] 33 First Microphone Flexible Bushing

[0044] 331 annular sleeve

[0045] 332 mounting ear plate

[0046] 333 Connecting cantilever

[0047] 335 end flange

[0048] 34 Second directional microphone cover

[0049] 35 Microphone Rigid Stand

[0050] 351 Ring support plate

[0051] 352 curved panels

[0052] 353 panel buckle

[0053] 354 Coaming ribs

[0054] 355 connecting ribs

[0055] 356 Crossing Channel

[0056] 36 Microphone Shell

[0057] 361 First Cavity

[0058] 362 wall grid holes

[0059] 363 cavity wall opening

[0060] 364 Second Cavity

[0061] 365 Cylinder Cavity Cover

[0062] 366 Intracavity Suspension

[0063] 367 Wall Lamp Hole

[0064] 369 Connecting base plate

[0065] 37 indicator light board

[0066] 39 Adapter Rotating Bracket

[0067] 391 adapter plug

[0068] 392 pivot bracket DETAILED DESCRIPTION

[0069] In order to make the objectives, technical solutions and advantages of this application more clear, the application is further described in detail below with reference to the accompanying drawings and examples.

[0070] Figure 1 This is an exemplary structural diagram of the audio collection device using a pickup microphone assembly in an embodiment of the present application. Figure 1 In an embodiment of the present application, the audio collection device may include a device base 10 and a sound pickup microphone assembly 30 , and the sound pickup microphone assembly 30 may be installed on the device base 10 .

[0071] For example, in an embodiment of the present application, the microphone assembly of the pickup microphone assembly 30 may include a directional microphone such as an electret, and the position of the pickup microphone assembly 30 relative to the device base 10 is adjustable to achieve directivity adjustment of the directional microphone.

[0072] For example, in an embodiment of the present application, the pickup microphone assembly 30 may include a first directional microphone and a second directional microphone with different pickup directions, thereby utilizing the differentiated pickup distances of the first directional microphone and the second directional microphone to improve the signal quality of the audio collection signal, which will be explained later.

[0073] For example, in an embodiment of the present application, the device base 10 can be fixedly equipped with a connector assembly 20, which can be used to realize signal interaction between the device base 10 and the pickup microphone assembly 30, and the pickup microphone assembly 30 can be adjustably mounted on the connector assembly 20, so that the position of the pickup microphone assembly 30 relative to the device base can be adjusted.

[0074] For example, in an embodiment of the present application, the device base 10 may further have a base panel 12. If the audio acquisition device is a table-top device, the carrier substrate 11 of the device base 10 may be used as the top plate of the device base 10 facing away from the table, and the connector assembly 20 may be fixedly mounted on the base panel 12 of the device base 10 used as the top plate.

[0075] Exemplarily, in an embodiment of the present application, the base panel 12 can be used to realize human-computer interaction of the audio acquisition device. For example, the base panel 12 can have at least one of a display screen and operation buttons, and if the carrier substrate 11 is used as the bottom plate of the device base, then the base panel 12 can be located above the carrier substrate 11. In this case, the connector assembly 20 (i.e., the connector assembly 20) can be fixedly mounted on the base panel 12, and the signal transmitted by the connector assembly 20 can include an interactive signal for human-computer interaction.

[0076] For example, in an embodiment of the present application, the pickup microphone assembly 30 can be mounted on the connector assembly 20 using an adapter rotating bracket 39 to achieve adjustable mounting of the pickup microphone assembly 30 on the connector assembly 20. The adapter rotating bracket 39 can include an adapter plug 391 and a pivot bracket 392. The adapter plug 391 can be fixedly inserted into the connector assembly 20, and the pivot bracket 392 can be rotatably connected to the adapter plug 391. Furthermore, the pivot bracket 392 can also be fixedly connected to the pickup microphone assembly 30. Thus, based on the relative rotation of the pivot bracket 392 relative to the adapter plug 391 and the connector assembly 20, the position of the pickup microphone assembly 30 relative to the device base 10 can be adjusted.

[0077] For example, in an embodiment of the present application, the device base 10 may include a carrier substrate 11. For example, if the audio capture device is a tabletop device, the carrier substrate 11 of the device base 10 may serve as the bottom plate for the device base 10 to contact the tabletop. The carrier substrate 11 may be detachably mounted with a battery module, and the signal transmitted via the connector assembly 20 may also include a power signal. Thus, the device base 10 and the pickup microphone assembly 30 plugged into the connector assembly 20 can both be powered by the battery module detachably mounted on the device base 10, thereby enabling plug-and-play operation of the pickup microphone assembly 30 in the device base 10.

[0078] Figure 2 This is a schematic diagram of the three-dimensional structure of the sound pickup microphone assembly used in the audio acquisition device in the embodiment of the present application. Figure 3 This is a bottom view of the pickup microphone assembly used in the audio collection device in the embodiment of this application. Figure 2 and Figure 3 In the embodiment of the present application, the pickup microphone assembly 30 may include a microphone housing 36 .

[0079] For example, in an embodiment of the present application, the microphone housing 36 can be used to mount the pickup microphone assembly 30 on the device base 10 of the audio acquisition device. For example, the microphone housing 36 can be used to fix the aforementioned adapter rotating bracket 39 (i.e., the rotating shaft bracket 392), and the microphone housing 36 can have a connecting base 369 for fixedly connecting to the adapter rotating bracket 39 (i.e., the rotating shaft bracket 392).

[0080] Exemplarily, in an embodiment of the present application, the microphone housing 36 may have a first barrel end pointing toward the sound source when the pickup microphone assembly 30 is in use, and a second barrel end away from the sound source relative to the first barrel end, and the connecting base plate 369 of the microphone housing 36 is used to be fixedly connected to the adapter rotating bracket 39 (i.e., the rotating shaft bracket 392), which may be closer to the second barrel end of the microphone housing 36.

[0081] Exemplarily, in an embodiment of the present application, the microphone shell 36 may have a first barrel cavity 361, which may be close to the microphone shell 36. The first barrel cavity 361 may be used to install a microphone assembly and an audio acquisition board. The microphone assembly may be connected to the audio acquisition board through a signal cable, and the audio acquisition board may generate an audio acquisition signal based on the audio acquisition result of the microphone assembly.

[0082] Exemplarily, in an embodiment of the present application, the first barrel cavity 361 of the microphone barrel shell 36 has a cavity wall opening 363, which can be used for the disassembly and assembly operations of components in the first barrel cavity 361, and the cavity wall opening 363 can be detachably covered with a cover plate not shown in the accompanying drawings.

[0083] For example, in an embodiment of the present application, the first cavity 361 of the microphone shell 36 can be connected to the outside world so that the microphone assembly fixedly installed in the first cavity 361 can receive sound waves generated by the sound source in the environment where the pickup microphone assembly 30 is located.

[0084] For example, in the embodiment of the present application, the first barrel cavity 361 of the microphone barrel housing 36 can extend to the first barrel end of the microphone barrel housing 36 in the length direction of the microphone, and the first barrel cavity 361 can have an end opening at the first barrel end of the microphone barrel housing 36, and the first barrel cavity 361 of the microphone barrel housing 36 can be connected to the outside through the end opening. Figure 1In the diagrammatic representation, the end opening of the first end of the first barrel cavity 361 of the microphone shell 36 is in a covered state, and the cover of the end opening is used to achieve dust-proof protection for the microphone assembly without affecting the normal use of the pickup microphone assembly. For example, the structural member covering the end opening can be a detachable dust cover, that is, the dust cover can be removed when the pickup microphone assembly is in use to ensure that the first barrel cavity 361 of the microphone shell 36 can communicate with the outside world through the end opening during the use of the pickup microphone. Alternatively, the interface member covering the end opening can also be a sound-transparent mesh cover, which can be normally installed on the end opening, and the sound-transparent property of the sound-transparent mesh cover can ensure that the first barrel cavity 361 of the microphone shell 36 can communicate with the outside world through the end opening during the use of the pickup microphone.

[0085] For example, in an embodiment of the present application, the shell wall (e.g., the side wall) of the microphone shell 36 may have a shell grille hole 362, and the first shell cavity 361 may also be connected to the outside world through the shell grille hole 362, and the shell grille hole 362 may be used to achieve sound pressure balance between the inside and outside of the first shell cavity 361 of the microphone shell 36. In this case, the audio acquisition board may be fixedly mounted on the top wall where the microphone shell 36 intersects with the shell wall (e.g., the side wall) where the shell grille hole 362 is located, or on the bottom cover mentioned above, so as to avoid the audio acquisition board blocking the shell grille hole 362, that is, the audio acquisition board is fixedly mounted in the first shell cavity 361 in a position that avoids the shell grille hole 362.

[0086] For example, in the embodiment of the present application, as described above, the directional microphones in the microphone assembly may include a first directional microphone 31 and a second directional microphone 32. The first directional microphone 31 and the second directional microphone 32 are both fixedly mounted in the first barrel cavity 361. In addition, the first directional microphone 31 and the second directional microphone 32 have opposite sound pickup directions. Thus, for any sound source in the environment where the sound pickup microphone assembly 30 is located, the sound pickup distances of the first directional microphone 31 and the second directional microphone 32 are different. Furthermore, by utilizing the audio collection results of the first directional microphone 31 and the second directional microphone 32 at different pickup distances, the signal quality of the audio signal (e.g., the audio signal generated by the audio acquisition board) can be improved.

[0087] For example, in an embodiment of the present application, the first directional microphone 31 and the second directional microphone 32 may be coaxially arranged adjacent to each other in the length direction of the microphone. The "adjacent" mentioned here means that there is no other physical structure between the first directional microphone 31 and the second directional microphone 32, and the sound pickup directions of the first directional microphone 31 and the second directional microphone 32 are opposite to each other in the length direction of the microphone housing 36. In other words, the sound pickup directions of the first directional microphone 31 and the second directional microphone 32 may be opposite to each other and parallel to the length direction of the microphone housing 36, so that the directivity of the first directional microphone 31 and the second directional microphone 32 can be intuitively indicated by the position of the microphone housing 36.

[0088] Exemplarily, in the embodiment of the present application, the first directional microphone 31 and the second directional microphone 32 are both located at the first barrel end of the microphone shell 36, and the second directional microphone 32 can be located on the side of the end opening of the first directional microphone 31 facing away from the first barrel cavity 361 in the microphone length direction of the microphone shell 36. In this case, the sound pickup direction of the first directional microphone 31 is toward the end opening of the first barrel cavity 361 at the first barrel end in the microphone length direction of the microphone shell 36, so that the first directional microphone 31 can pass through the end opening of the first barrel end of the microphone shell 36 of the first barrel cavity 361, and the sound pickup direction of the second directional microphone 32 is toward the end opening of the first barrel cavity 361 along the microphone length direction of the microphone shell 36.

[0089] Exemplarily, in an embodiment of the present application, if the external sound source is located in the direction pointed by the first tube end of the microphone shell 36, then: the first directional microphone 31 can receive sound waves that are directly transmitted from the external sound source to the first tube end of the microphone shell 36, and the sound waves generated by the same sound source received by the second directional microphone 32 need to detour from the side facing away from the first tube end of the microphone shell 36 to reach the second directional microphone 32. Therefore, the propagation distance of the sound waves generated by the same sound source received by the second directional microphone 32 (i.e., the second pickup distance) can be greater than the propagation distance of the sound waves generated by the same sound source received by the first directional microphone 31 (i.e., the first pickup distance), thereby achieving the differentiation of the pickup distances of the first directional microphone 31 and the second directional microphone 32.

[0090] For example, in an embodiment of the present application, if the second directional microphone 32 is located on the side of the first directional microphone 31 facing away from the end opening of the first barrel cavity 361 in the microphone housing 36's microphone length direction, then when the first barrel cavity 361 of the microphone housing 36 is covered, for example, when the cavity wall opening 363 of the first barrel cavity 361 is covered by a cover plate, the second directional microphone 32 is in a hidden state. In this case, if the first directional microphone 31 falls off due to external vibration, maintenance operations can be performed using the end opening of the first barrel cavity 361 at the first barrel end of the microphone housing 36. However, if the second directional microphone 32 falls off due to external vibration, maintenance operations can only be performed by removing the cover plate and opening the first barrel cavity 361 of the microphone housing 36. Therefore, in order to reduce the risk of the second directional microphone 32 falling off, the embodiment of the present application can adopt a reinforced mounting method for the second directional microphone 32 that is more stable than the first directional microphone 32.

[0091] For example, in the embodiment of the present application, the first directional microphone 31 can be embedded in the first microphone flexible bushing 33, and the first microphone flexible bushing 33 is hung on the wall of the microphone shell 36 at the first barrel end. Therefore, based on the flexible constraint of the first microphone flexible bushing 33 between the first directional microphone 31 and the microphone shell 36, the first directional microphone 31 can be fixedly installed in the first barrel cavity 361 at the first barrel end of the microphone shell 36, and the first microphone flexible bushing 33 can also be used to achieve shockproof protection for the first directional microphone 31.

[0092] For example, in an embodiment of the present application, the second directional microphone 32 can be embedded in the second microphone flexible bushing 34, which can be snap-fitted to the microphone rigid bracket 35. Furthermore, the microphone rigid bracket 35 can be fixedly connected to the wall of the microphone shell 36 at the first barrel end of the microphone shell 36 using connectors such as screws. Thus, based on the fixed connection between the microphone rigid bracket 36 and the microphone shell 36 using connectors, and the flexible connection between the second microphone flexible bushing 34 and the second directional microphone 32, the second directional microphone 32 can be fixedly installed in the first barrel cavity 361 at the first barrel end with a stronger mounting strength than the first directional microphone 31. Furthermore, the second microphone flexible bushing 34 can also be used to provide shockproof protection for the second directional microphone 33.

[0093] For example, in the embodiment of the present application, the first microphone flexible bushing 33 and the second microphone flexible bushing 34 may include a rubber material, and the microphone rigid bracket 36 may be made of a plastic material.

[0094] Figure 4This is a front projection schematic diagram of a first microphone flexible bushing for mounting a first directional microphone on a sound pickup microphone assembly in an embodiment of the present application. Figure 5 This is a side cross-sectional view of the first microphone flexible bushing for mounting the first directional microphone in the pickup microphone assembly in the embodiment of the present application. Figure 4 and Figure 5 In an embodiment of the present application, the first microphone flexible bushing 33 may include an annular sleeve 331 and at least two hanging ear plates 332 (the embodiment of the present application is illustrated using four hanging ear plates 332 as an example), at least two hanging ear plates 332 are distributed on the outside of the annular sleeve 331 in the radial direction, and each hanging ear plate 332 is connected to the annular sleeve 331 through a corresponding connecting cantilever 333. For example, the connecting cantilever 333 connected between each hanging ear plate 332 and the annular sleeve 331 may include a pair of ribs expanding from the hanging ear plate 332 to the annular sleeve 331 at a preset angle.

[0095] Exemplarily, in an embodiment of the present application, the first directional microphone 31 is embedded in the annular sleeve 331, the axial sound pickup end face of the first directional microphone 31 is exposed through the open end face of the annular sleeve 331, and the microphone circumference of the first directional microphone 31 is covered by the annular sleeve 331. For example, the microphone circumference of the first directional microphone 31 can be interference fit with the barrel cavity of the annular sleeve 331.

[0096] Exemplarily, in an embodiment of the present application, the wall of the microphone shell 36 has at least two intra-cavity suspension columns 336 on the inner side facing the first cylinder cavity 361. For example, the number of the intra-cavity suspension columns 336 is equal to the number of the hanging ear plates 332. At least two intra-cavity suspension columns 336 protrude along the microphone length direction of the microphone shell 36 toward the end opening of the first cylinder cavity 361 at the first cylinder end, and at least two hanging ear plates 332 are respectively hung on the at least two intra-cavity suspension columns 336, so that the axial direction of the annular sleeve 331 is parallel to the microphone length direction of the microphone shell, and the axial sound pickup end face of the first directional microphone 31 is opened at the end of the first cylinder end toward the first cylinder cavity 361 in the microphone length direction of the microphone shell 36. That is, the first directional microphone 31 is fixedly installed in the first cylinder cavity 361 at the first cylinder end of the microphone shell with the sound pickup end face (that is, the sound pickup direction) facing the end opening of the first cylinder cavity 361 at the first cylinder end.

[0097] Exemplarily, in an embodiment of the present application, the opening edge of the end face opening of the annular sleeve 331 may further have an end face flange 335 , and the end face flange 335 may implement axial limitation on the first directional microphone 31 in the annular sleeve 331 in the axial direction.

[0098] Figure 6This is a schematic diagram of the first three-dimensional structure of a microphone rigid bracket for mounting a second directional microphone on a sound pickup microphone assembly in an embodiment of the present application. Figure 7 This is a second three-dimensional structural schematic diagram of a microphone rigid bracket for mounting a second directional microphone on a sound pickup microphone assembly in an embodiment of the present application. Figure 8 This is a schematic diagram of the orthographic projection structure of a microphone rigid bracket for mounting a second directional microphone on a sound pickup microphone assembly in an embodiment of the present application. Figure 9 This is a schematic diagram of the partial assembly structure of the second directional microphone and the microphone rigid bracket of the pickup microphone assembly in the embodiment of this application. Figures 6 to 9 In an embodiment of the present application, the microphone rigid bracket 35 may include an annular support plate 351, an arc-shaped surrounding plate 352 and a connecting rib 355, wherein the arc-shaped surrounding plate 352 protrudes along the axial direction of the annular support plate 351 at the edge of the annular support plate 351, and the connecting rib 355 is fixedly connected to at least one of the annular support plate 351 and the arc-shaped surrounding plate 352.

[0099] For example, in an embodiment of the present application, the second directional microphone 32 can be fixed to the annular support plate 351 by utilizing the limiting cooperation between the second microphone flexible bushing 34 and the arc-shaped surrounding plate 352 .

[0100] Exemplarily, in an embodiment of the present application, the second directional microphone 32 is embedded in the second microphone flexible bushing 34, the axial sound pickup end face of the second directional microphone 32 is exposed through the open end face of the second microphone flexible bushing 34, and the microphone circumference of the second directional microphone 32 is covered by the second microphone flexible bushing 34. For example, the microphone circumference of the second directional microphone 32 can be interference fit with the barrel cavity of the second microphone flexible bushing 34. The axial directions of the second directional microphone 32 and the second microphone flexible bushing 34 are both parallel to the annular support plate 351. The second directional microphone 32 and the second microphone flexible bushing 34 are stacked with the annular support plate 351 in the axial direction, and the axial sound pickup end face of the second directional microphone 32 faces the annular support plate 351, so that the axial sound pickup end face of the second directional microphone 32 is exposed through the end face opening of the second microphone flexible bushing 34 and the annular opening of the annular support plate 351.

[0101] Exemplarily, in an embodiment of the present application, the arc-shaped enclosure 352 may have an enclosure buckle 353, and the limiting cooperation between the second microphone flexible bushing 34 and the arc-shaped enclosure 352 may include: the enclosure buckle 353 generates a clamping limit on the second microphone flexible bushing 34 in the axial direction of the annular support plate 351.

[0102] Exemplarily, in an embodiment of the present application, the inner surface of the arc-shaped enclosure 352 in the radial direction of the annular support plate 351 may have an enclosure rib 354, and the limiting cooperation between the second microphone flexible bushing 34 and the arc-shaped enclosure 352 may include: the enclosure rib 354 generates interference limiting on the second microphone flexible bushing 34 in the radial direction of the annular support plate 351.

[0103] For example, in an embodiment of the present application, the connecting rib 355 can be fixedly connected to the wall of the microphone shell 36 by means of a connecting piece, so that the second directional microphone 32 is fixedly installed in the first cylinder cavity 361 at the first cylinder end of the microphone shell 36, with the pickup end face (i.e., the pickup direction) facing away from the end opening of the first cylinder cavity 361 at the first cylinder end.

[0104] For example, in an embodiment of the present application, if the axial sound pickup end face of the second directional microphone 32 is exposed through the end face opening of the second microphone flexible bushing 34 and the annular opening of the annular support plate 351, then when the second directional microphone 32 is located on the side of the annular support plate 351 that faces the first directional microphone 31 in the axial direction, its sound pickup end face (i.e., the sound pickup direction) can be fixedly installed in the first barrel cavity 361 with its sound pickup end face facing away from the end opening of the first barrel end of the first barrel cavity 361. In this case, in order to provide operating space for fixing the connecting rib 355 to the barrel wall of the microphone barrel housing 36 using a connecting member, the connecting rib 355 can be located on the side of the annular support plate 351 that faces away from the first directional microphone 31 in the axial direction.

[0105] Exemplarily, in an embodiment of the present application, the outer surface of the arc-shaped enclosure 352 in the radial direction of the annular support plate 351 may have enclosure ribs, and wire passages 356 may be reserved between the enclosure ribs. The wire passages 356 can be used to deploy signal cables between the first directional microphone 31 and the second directional microphone 32 and the audio acquisition board in the first barrel cavity 361.

[0106] For example, in an embodiment of the present application, if the axial sound pickup end face of the second directional microphone 32 is exposed through the end face opening of the second microphone flexible bushing 34 and the annular opening of the annular support plate 351, then when the second directional microphone 32 is located on the side of the annular support plate 351 that faces the first directional microphone 31 in the axial direction, its sound pickup end face (i.e., the sound pickup direction) can be fixedly installed in the first barrel cavity 361 with its sound pickup end face facing away from the end opening of the first barrel end of the first barrel cavity 361. In this case, since the connecting rib 355 needs to be fixed to the barrel wall of the microphone barrel shell 36 by a connecting member, in order to provide sufficient operating space for the connecting member, the connecting rib 355 can be located on the side of the annular support plate 351 that faces away from the first directional microphone 31 in the axial direction.

[0107] Exemplarily, in an embodiment of the present application, the outer surface of the arc-shaped enclosure 352 in the radial direction of the annular support plate 351 may have enclosure ribs, and wire passages 356 may be reserved between the enclosure ribs. The wire passages 356 can be used to deploy signal cables between the first directional microphone 31 and the second directional microphone 32 and the audio acquisition board in the first barrel cavity 361.

[0108] Illustratively, in an embodiment of the present application, an indicator light board 37 may be installed in the first tube cavity 361 of the microphone tube shell 36, and a tube wall lamp hole 367 may be opened in the tube wall of the microphone tube shell 36, and the indicator light board 37 and the tube wall lamp control 367 may be connected to each other through a light-guiding medium, so that the visible light generated by the light-emitting element of the indicator light board 37 is transmitted to the tube wall lamp hole 367 through the light-guiding medium.

[0109] For example, in the embodiment of the present application, the microphone housing 36 may further have a second barrel cavity 364. This second barrel cavity 364 is closer to the second barrel end of the microphone housing 36 than the first barrel cavity 361. This second barrel cavity 364 can be used to place auxiliary components or for cable connection. In addition, this second barrel cavity 364 can be covered with a barrel cavity cover 365. The embodiment of the present application does not make unnecessary restrictions on the use of the second barrel cavity 364.

[0110] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A pickup microphone assembly, characterized in that: include: A microphone housing (36), wherein the microphone housing (36) has a first cavity (361), and the first cavity (361) is in communication with the outside world; A microphone assembly comprises a first directional microphone (31) and a second directional microphone (32), wherein the first directional microphone (31) and the second directional microphone (32) are both fixedly mounted in the first barrel cavity (361), and the sound pickup directions of the first directional microphone (31) and the second directional microphone (32) are opposite.

2. The pickup microphone assembly according to claim 1, characterized in that: The first directional microphone (31) and the second directional microphone (32) are coaxially arranged adjacent to each other in the length direction of the microphone, and the sound pickup directions of the first directional microphone (31) and the second directional microphone (32) are opposite to each other in the length direction of the microphone.

3. The pickup microphone assembly according to claim 2, characterized in that: The first barrel cavity (361) extends to a first barrel end of the microphone barrel shell (36) in the length direction of the microphone, the first barrel cavity (361) has an end opening at the first barrel end, and the first barrel cavity (361) is connected to the outside through the end opening; The first directional microphone (31) and the second directional microphone (32) are both located at the first tube end, the second directional microphone (32) is located on the side of the first directional microphone (31) facing away from the end opening in the length direction of the microphone, the sound pickup direction of the first directional microphone (31) is toward the end opening in the length direction of the microphone, and the sound pickup direction of the second directional microphone (32) is away from the end opening along the length direction of the microphone.

4. The pickup microphone assembly according to claim 1 or 3, characterized in that: The shell wall of the microphone shell (36) has a shell grid hole (362), and the first shell cavity (361) is also connected to the outside through the shell grid hole (362).

5. The pickup microphone assembly according to claim 3, characterized in that: The first directional microphone (31) is embedded in a first microphone flexible bushing (33), and the first microphone flexible bushing (33) is hung on the wall of the microphone shell (36) at the first barrel end, so that the first directional microphone (31) is fixedly installed in the first barrel cavity (361) at the first barrel end; The second directional microphone (32) is embedded in the second microphone flexible bushing (34), and the second microphone flexible bushing (34) is snap-fitted to the microphone rigid bracket (35). In addition, the microphone rigid bracket (35) is fixedly connected to the wall of the microphone shell (36) at the first barrel end by a connecting piece, so that the second directional microphone (32) is fixedly installed in the first barrel cavity (361) at the first barrel end.

6. The pickup microphone assembly according to claim 5, characterized in that: The first microphone flexible bushing (33) comprises an annular sleeve (331) and at least two hanging ear plates (332), wherein the at least two hanging ear plates (332) are distributed on the outside of the annular sleeve (331) in the radial direction, and each of the hanging ear plates (332) is connected to the annular sleeve (331) via a corresponding connecting cantilever (333); The first directional microphone (31) is embedded in the annular sleeve (331), and the axial sound pickup end face of the first directional microphone (31) is exposed through the end face opening of the annular sleeve (331); The wall of the microphone shell (36) has at least two in-cavity suspension columns (336) on the inner side facing the first cylinder cavity (361), and at least two in-cavity suspension columns (336) protrude toward the end opening along the length direction of the microphone, and at least two hanging ear plates (332) are respectively hung on at least two in-cavity suspension columns (336), so that the first directional microphone (31) is fixedly installed in the first cylinder cavity (361) at the first cylinder end with the axial sound pickup end surface facing the end opening.

7. The pickup microphone assembly according to claim 6, characterized in that: The connecting cantilever (333) connected between each of the hanging ear plates (332) and the annular sleeve (331) comprises a pair of ribs extending from the hanging ear plates (332) to the annular sleeve (331) at a preset angle; and / or, The opening edge of the end face opening of the annular sleeve (331) further has an end face flange (335), and the end face flange (335) implements axial limitation on the first directional microphone (31) in the annular sleeve (331) in the axial direction.

8. The pickup microphone assembly according to claim 5, characterized in that: The microphone rigid support (35) comprises an annular support plate (351), an arc-shaped enclosing plate (352), and a connecting rib plate (355), wherein the arc-shaped enclosing plate (352) protrudes from the edge of the annular support plate (351) along the axial direction of the annular support plate (351), and the connecting rib plate (355) is fixedly connected to at least one of the annular support plate (351) and the arc-shaped enclosing plate (352); The second directional microphone (32) is fixed to the annular support plate (351) by means of a limiting fit between the second microphone flexible bushing (34) and the arc-shaped enclosing plate (352), and the axial sound pickup end face of the second directional microphone (32) is exposed through the end face opening of the second microphone flexible bushing (34) and the annular opening of the annular support plate (351); The connecting rib (355) is fixedly connected to the wall of the microphone shell (36) by means of the connecting piece, so that the second directional microphone (32) is fixedly installed in the first cylinder cavity (361) at the first cylinder end with the axial sound pickup end surface facing away from the end opening.

9. The pickup microphone assembly according to claim 8, characterized in that: The arc-shaped enclosure (352) has an enclosure buckle (353), and the limiting cooperation between the second microphone flexible bushing (34) and the arc-shaped enclosure (352) includes: the enclosure buckle (353) generates a clamping limit on the second microphone flexible bushing (34) in the axial direction of the annular support plate (351); and / or, The inner surface of the arc-shaped enclosure (352) in the radial direction of the annular support plate (351) has an enclosure rib (354), and the limiting cooperation between the second microphone flexible bushing (34) and the arc-shaped enclosure (352) includes: the enclosure rib (354) generates interference limiting on the second microphone flexible bushing (34) in the radial direction of the annular support plate (351); and / or, The second directional microphone (32) is located on a side of the annular support plate (351) facing the first directional microphone (31) in the axial direction, and the connecting rib (355) is located on a side of the annular support plate (351) facing away from the first directional microphone (31) in the axial direction; and / or, The arc-shaped enclosure (352) has enclosure ribs on its outer surface in the radial direction of the annular support plate (351), and wire passages are reserved between the enclosure ribs. An audio collection board is also installed in the first cylinder cavity (361), and the wire passages are used to deploy signal cables between the first directional microphone (31), the second directional microphone (32) and the audio collection board.

10. An audio acquisition device, characterized in that: The invention comprises a device base and a sound pickup microphone assembly according to any one of claims 1 to 9, wherein the sound pickup microphone assembly is mounted on the device base, and the posture of the sound pickup microphone assembly relative to the device base is adjustable.

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