An acoustic structure for a pickup

Abstract

The application discloses a pickup acoustic structure and relates to the technical field of pickups. The pickup acoustic structure comprises a microphone array, a shell and a first waterproof mesh cloth. The microphone array is arranged on a mounting plate and comprises a plurality of microphones. The mounting plate is provided with sound inlet holes penetrating through the mounting plate corresponding to each microphone. The shell has a side wall, an upper port and a lower port. The side wall encloses a cavity. The upper port is connected to one side surface of the mounting plate. The lower port is communicated with the outside world. The lower port is covered with a mesh cover. The first waterproof mesh cloth covers the lower port of the shell. The mesh cover can block the air flow speed to some extent. The cavity is arranged to increase the air travel distance into the sound inlet hole, so that the wind noise reduction effect is better. The first waterproof mesh cloth forms the first line of defense to prevent water from the outside world into the pickup. The cavity has a certain thickness, which can further increase the water travel distance into the sound inlet hole, so that the pickup has excellent waterproof effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sound pick-up, in particular to a sound pick-up acoustic structure. BACKGROUND

[0002] Sound pick-ups are widely used in various electronic products for collecting live environment sound. Some outdoor cameras are equipped with sound pick-ups, which can collect live environment sound synchronously while acquiring image information, so as to improve security effect.

[0003] Outdoor working environment has the characteristics of strong wind and much rain. The existing sound pick-up is filled with windproof cotton in the shell or provided with a windproof net at the port to improve the windproof effect. However, the windproof effect of the windproof cotton or the windproof net is limited, and the sound pick-up does not have waterproof effect, resulting in short service life of the sound pick-up.

[0004] Therefore, a new technical solution is needed to solve the above technical problems. SUMMARY

[0005] The present application aims to provide a sound pick-up acoustic structure with good windproof effect, good waterproof effect and long service life.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical means:

[0007] A sound pick-up acoustic structure comprises:

[0008] A microphone array is arranged on a mounting plate and comprises a plurality of microphones. The mounting plate is provided with a sound inlet hole penetrating the mounting plate corresponding to each microphone.

[0009] A shell has a side wall, an upper port and a lower port. The side wall encloses a cavity. The upper port is connected to one side of the mounting plate. The lower port is connected to the outside, and the lower port is covered with a mesh cover.

[0010] A first waterproof mesh cloth covers the lower port of the shell.

[0011] Specifically, it further comprises a second waterproof mesh cloth, which is arranged in the cavity and close to the upper port of the shell.

[0012] Specifically, the first mesh cloth and / or the second mesh cloth are of woven structure or film structure.

[0013] Specifically, the shape of the shell is trumpet-shaped.

[0014] Specifically, the shell comprises a fixed part and a bent part arranged at one end of the fixed part. The bent part has a mounting plane, and the second waterproof mesh cloth is laid on the mounting plane.

[0015] Specifically, an elastic gasket is arranged between the bending part and the mounting plate.

[0016] Specifically, the elastic gasket comprises rubber and / or foam.

[0017] Specifically, the mounting plate, the bending part and the second waterproof mesh cloth jointly form a first cavity, and the first cavity is at least partially filled with windproof cotton.

[0018] Specifically, the second waterproof mesh cloth, the side wall of the shell and the mesh cover jointly form a second cavity, and the second cavity is at least partially filled with windproof cotton.

[0019] Specifically, the microphone is an ECM microphone or a MEMS microphone.

[0020] Compared with the prior art, the present application has the following technical effects:

[0021] The acoustic structure of the sound pickup device comprises a shell and a mesh cover covering the lower port of the shell, the shell forms a cavity inside, the mesh cover itself can block the air flow speed to a certain extent, and the cavity is arranged to increase the travel of air entering the sound hole, so that the wind noise reduction effect is better; the first waterproof mesh cloth is arranged at the lower port of the shell to form the first line of defense for preventing water from entering the sound pickup device, and the cavity has a certain thickness, so as to further increase the travel of water entering the sound hole, thereby ensuring that the sound pickup device has excellent waterproof effect. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 FIG. 1 is a perspective view of a microphone array and a shell of a sound pickup device according to the present application;

[0024] Figure 2 FIG. 2 is a perspective view of the shell of the sound pickup device according to the present application;

[0025] Figure 3 FIG. 3 is a sectional view of a sound pickup device according to the present application (the mounting plate is a PCB plate, and the microphone is a MEMS microphone);

[0026] Figure 4 FIG. 4 is an enlarged schematic view of part A of FIG. 3; Figure 3

[0027] ​Figure 5 A cross-sectional view of another acoustic structure of the pickup of the present embodiment (the mounting plate is a fixed structure, and the microphone is an ECM microphone).

[0028] Main element symbol description:

[0029] 10 - microphone array; 11 - mounting plate; 111 - PCB board; 112 - fixed structure; 12 - sound inlet hole; 20 - shell; 21 - cavity; 211 - first chamber; 212 - second chamber; 22 - mesh cover; 23 - fixed part; 24 - bending part; 241 - mounting plane; 30 - first waterproof mesh cloth; 40 - second waterproof mesh cloth; 50 - elastic gasket; 60 - windproof cotton. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described in detail below with reference to examples illustrated in the accompanying drawings, in which the same or similar elements or elements having the same or similar functions are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended only for the purpose of explaining the present application, and should not be understood as limiting the present application.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as limiting the present application.

[0032] In addition, the terms "first", "second" are only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0033] In the present application, unless specifically defined otherwise and limited, the terms "mount", "connect", "connection", "fixed", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In the present application, unless specifically defined otherwise and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact or indirectly contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0035] Please refer to Figures 1 to 5 An embodiment of the present application discloses a pickup acoustic structure, comprising:

[0036] A microphone array 10 is arranged on a mounting plate 11, comprising a plurality of microphones, and the mounting plate 11 is provided with a sound inlet hole 12 penetrating through the mounting plate 11 corresponding to each microphone;

[0037] A shell 20 has a side wall, an upper port and a lower port, the side wall encloses a cavity 21, the upper port is connected to one side of the mounting plate 11, the lower port is communicated with the outside, and the lower port is covered with a mesh cover 22; and

[0038] A first waterproof mesh cloth 30 covers the lower port of the shell 20.

[0039] Specifically, the first waterproof mesh cloth 30 is arranged on the inner wall of the mesh cover 22, and the mesh cover 22 can protect the first waterproof mesh cloth 30 to prevent sharp objects from damaging the first waterproof mesh cloth 30.

[0040] The acoustic structure of the pickup of the present application comprises a shell 20 and a mesh cover 22 covering the lower port of the shell 20, the interior of the shell 20 forms a cavity 21, the mesh cover 22 itself can play a certain effect of blocking the air flow speed, plus the setting of the cavity 21, increasing the travel of air into the sound hole 12, thus being able to achieve better wind noise reduction effect; by setting the first waterproof mesh cloth 30 at the lower port of the shell 20, forming the first line of defense against water entering the pickup from the outside, plus the cavity 21 having a certain thickness, the travel of water into the sound hole 12 can be further increased, thereby ensuring that the pickup has excellent waterproof effect.

[0041] The working principle of the acoustic structure of the pickup is as follows: the sound signal enters the cavity 21 from the outside through the mesh cover 22, the first mesh cloth, and the lower port of the shell 20, and then is transmitted to the microphone array 10 through the sound hole 12.

[0042] In addition, the use state of the acoustic structure of the pickup is that the upper port faces upward and the lower port faces downward, even if water enters the cavity 21, it will flow out from the lower port along the shell 20 under the action of gravity, further improving the waterproof effect.

[0043] In a specific embodiment, the microphone is an ECM (Electret Capacitance Microphone) microphone or a MEMS (Micro-Electro-Mechanical System) microphone.

[0044] The frequency response range of the ECM microphone is relatively narrow, but the sensitivity is high, and it is suitable for language pickup. Compared with the ECM microphone, the performance of the MEMS microphone at different temperatures is very stable, the size is small, and it has a very high power supply rejection ratio, which can effectively suppress the fluctuation of the power supply voltage.

[0045] The mounting plate 11 is a PCB board 111 or a fixed structure 112. Please refer to Figure 5 , the ECM microphone is fixed on the fixed structure 112; please refer to Figure 4 , the MEMS microphone is a patch type back sound MEMS microphone, which is attached to the PCB board 111.

[0046] In a specific embodiment, please refer to Figure 3 and Figure 4 , the acoustic structure of the pickup further comprises a second waterproof mesh cloth 40, which is located in the cavity 21 and is arranged close to the upper port of the shell 20.

[0047] Among them, the first waterproof mesh cloth 30 and the second waterproof mesh cloth 40 cover all the sound holes 12 in terms of area.

[0048] The second waterproof mesh cloth 40 is arranged, so that the water entering the cavity 21 can be limited to flow into the microphone array 10, and the waterproof effect of the sound pickup device is further improved.

[0049] In other embodiments, the second waterproof mesh cloth 40 has multiple connection modes with the shell 20. Specifically, the inner side wall of the shell 20 is provided with multiple buckles distributed parallel to the mounting plate 11 at the position close to the upper port, and the second waterproof mesh cloth 40 is provided with multiple clamping grooves distributed circumferentially along the edge thereof, so that the multiple buckles are clamped in the clamping grooves to achieve the installation of the second waterproof mesh cloth 40. Alternatively, the edge of the second waterproof mesh cloth 40 is pasted to the edge of the upper port of the shell 20, and the waterproof mesh cloth 40 completely covers the sound inlet hole 12. Alternatively, the edge of the second waterproof mesh cloth 40 is pasted to the side wall of the shell 20, and the mesh cloth is in a suspended state after installation.

[0050] In a specific embodiment, the first waterproof mesh cloth 30 and / or the second waterproof mesh cloth 40 is of a woven structure or a film structure.

[0051] Specifically, multiple through holes are formed on the woven structure, which can slow down the flow rate of the air flowing into the cavity 21, reduce the vortex and turbulent flow of the air in the cavity 21, thereby reducing the wind noise and improving the windproof effect. Preferably, a hydrophobic coating can be arranged on the woven structure, so that water cannot pass through the through holes to enter the cavity 21, and the waterproof performance of the sound pickup device is improved. One specific embodiment of the film structure is a waterproof sound-permeable film. The waterproof sound-permeable film is a high-molecular porous waterproof material. The porous waterproof material has the characteristics of blocking water penetration but allowing sound to pass through. For example, a polytetrafluoroethylene (PTFE) porous film is used to improve the waterproof performance of the sound pickup device.

[0052] In a specific embodiment, the shape of the shell 20 is a horn shape. Specifically, the area of the upper port of the shell 20 is smaller than the area of the lower port.

[0053] Of course, in other embodiments, the three-dimensional structure of the shell 20 is a trapezoidal table, a circular table, or a prismatic table.

[0054] Specifically, the cavity 21 includes a first chamber 211 and a second chamber 212. The mounting plate 11, the bent portion 24, and the second waterproof mesh cloth 40 jointly form the first chamber 211, and the second waterproof mesh cloth 40, the side wall of the shell 20, and the mesh cover 22 jointly form the second chamber 212. The shape of the first chamber 211 is defined as a table body by the shell 20, and the shape of the second chamber 212 is defined as a cuboid.

[0055] In other embodiments, the shape of the first chamber 211 is a cylinder or a square, and the shape of the second chamber 212 is a trapezoidal table, a circular table, or a prismatic table.

[0056] In the related art, the pickup acoustic structure only sets one cavity, and the shape of the cavity is not further limited. The sound is easy to produce phase difference during the propagation in the cavity, thereby affecting the sound transmission performance.

[0057] The acoustic structure of the embodiment can maximize the phase difference of the sound signals picked up by the microphones without affecting the phase difference of the sound signals picked up by the microphones, and the sound transmission performance of the microphone is high.

[0058] The acoustic structure of the embodiment can maximize the phase difference of the sound signals picked up by the microphones without affecting the phase difference of the sound signals picked up by the microphones, and the sound transmission performance of the microphone is high.

[0059] In one specific embodiment, the shell 20 includes a fixed part 232 and a bent part 24 bent at one end of the fixed part 232. The bent part 24 has a mounting plane 241, and the second waterproof mesh cloth 40 is arranged on the mounting plane 241. The mounting plane 241 is specifically a step-shaped structure protruding inward from the side wall of the shell.

[0060] The mounting plane 241 is used to provide a mounting position for the second waterproof mesh cloth 40, so that the installation of the second waterproof mesh cloth 40 is more firm and reliable.

[0061] In one specific embodiment, an elastic gasket 50 is arranged between the mounting plane of the bent part 24 and the mounting plate 11. The mounting plane and the mounting plate 11 are parallel to each other.

[0062] The elastic gasket 50 is used to support the bent part 24 and the mounting plate 11, prevent the shell 20 from deforming under external force, increase the service life of the pickup acoustic structure, and seal the gap between the bent part 24 and the mounting plate 11 to prevent water from entering the cavity 21 through the gap, thereby further improving the waterproof performance of the pickup.

[0063] Specifically, the elastic gasket 50 includes rubber and / or foam.

[0064] The rubber has the advantages of high elasticity, wear resistance, and cold resistance. The foam has the advantages of high elasticity, light weight, and fast pressure-sensitive fixation. Both of them have good sealing performance and are suitable for supporting the shell 20.

[0065] In one preferred embodiment, the mounting plate 11, the bent part 24, and the second waterproof mesh cloth 40 form the first cavity 211, and the first cavity 211 is at least partially filled with the windproof cotton 60.

[0066] The windproof cotton 60 can reduce the vortex flow generated in the first chamber 211, especially the vortex flow generated at the abutting position of the elastic gasket 50 and the shell 20, thereby reducing the wind noise.

[0067] In a specific embodiment, the second waterproof mesh 40, the side wall of the shell 20 and the mesh cover 22 form a second chamber 212, and the second chamber 212 is at least partially filled with the windproof cotton 60.

[0068] The windproof cotton 60 can reduce the vortex flow in the second chamber 212, thereby further reducing the wind noise generated in the second chamber 212.

[0069] In the specific embodiment, the windproof cotton 60 is arranged in the first chamber 211 or the second chamber 212, and the first waterproof mesh 30 and the second waterproof mesh 40 are detachably arranged on the shell 20, so that the windproof cotton 60 can be easily put in or taken out, and the windproof cotton 60, the first waterproof mesh 30 and the second waterproof mesh 40 can be selectively configured according to the actual waterproof requirement, thereby achieving flexible and reliable manufacturing.

[0070] Specifically, the detachable connection can be that two clamps are arranged on the shell 20, the first waterproof mesh 30 is clamped on one clamp, and the second waterproof mesh 40 is clamped on the other clamp.

[0071] It should be noted that the pickup mainly applied in outdoor scenarios, and therefore the windproof and waterproof functions need to be considered simultaneously. If only one of the functions is considered, for example, only the windproof function is considered, the pickup may be damaged by rainwater. If only the waterproof function is considered, the pickup may be affected by the wind noise, thereby affecting the pickup effect. The present application designs a new pickup acoustic structure from the overall effect, which can well balance the two functions and achieve good waterproof and windproof effects.

[0072] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0073] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that changes, modifications, substitutions and variations can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A pickup acoustic structure, characterized by, The microphone array is arranged on the mounting plate, and the mounting plate is provided with a sound inlet hole corresponding to each microphone. The shell has a side wall, an upper port and a lower port, the side wall encloses a cavity, the upper port is connected to one side of the mounting plate, the lower port is connected to the outside, and the lower port is covered with a mesh cover, the cavity includes a first chamber and a second chamber, the first chamber and the second chamber are connected in series, and the whole is a trapezoidal structure with a small upper part and a large lower part. The first waterproof mesh cloth covers the lower port of the shell. The second waterproof mesh cloth is located in the cavity and is arranged close to the upper port of the shell.

2. A pickup acoustic structure according to claim 1, characterized in that: The first waterproof mesh cloth and / or the second waterproof mesh cloth are of woven structure or film structure.

3. A phonograph acoustic structure according to claim 2, characterized in that: The shape of the shell is trumpet-shaped.

4. A phonograph acoustic structure according to claim 3, characterized in that: The shell includes a fixed part and a bent part arranged at one end of the fixed part, the bent part has a mounting plane, and the edge of the second waterproof mesh cloth is laid on the mounting plane.

5. A phonograph acoustic structure according to claim 4, characterized in that: An elastic gasket is arranged between the bent part and the mounting plate.

6. A phonograph acoustic structure according to claim 5, characterized in that: The elastic gasket includes rubber and / or foam.

7. A phonograph acoustic structure according to claim 6, characterized in that: The mounting plate, the bent part and the second waterproof mesh cloth enclose the first chamber, and the first chamber is at least partially filled with windproof cotton.

8. The acoustic structure of a pickup according to claim 6, characterized in that: The second waterproof mesh cloth, the side wall of the shell and the mesh cover enclose the second chamber, and the second chamber is at least partially filled with windproof cotton.

9. The acoustic structure of a pickup according to claim 2, characterized in that: The microphone is an ECM microphone or a MEMS microphone.

10. A phonograph acoustic structure according to claim 9, characterized in that: ​

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