A mounting plate, a microphone module, a radio device and a terminal

Abstract

This application discloses a mounting plate, a microphone module, a recording device, and a terminal. The mounting plate is used to mount the microphone module, which includes a microphone and a mounting plate. The microphone has a pickup hole, and the mounting plate has a through hole. The mounting plate has a through hole that penetrates the mounting plate along its thickness direction. Along the thickness direction of the mounting plate, the pickup hole, the through hole, and the through hole are sequentially connected, with at least a portion of the through hole offset from the pickup hole. In this application, by setting the through hole of the mounting plate to connect with the pickup hole through the through hole of the mounting plate, and at least a portion of the through hole of the mounting plate offset from the pickup hole, the microphone can have a good frequency response curve, and foreign objects such as high-pressure water flow, dust, or airflow can be prevented from directly entering the pickup hole through the through hole. This prevents foreign objects from entering the microphone's interior through the pickup hole, and prevents signal conversion components, circuit boards, and waterproof and dustproof mesh inside the cavity from malfunctioning or even being damaged by foreign objects.

Description

Technical Field

[0001] This application relates to the field of microphone technology, and in particular to a mounting plate, microphone module, sound receiving device and terminal. Background Technology

[0002] To meet the sound collection needs of terminals in specific scenarios, thereby improving user experience and increasing safety, terminals such as vehicles, drones, and robots are equipped with external microphones. When a microphone is placed on the outside of a vehicle, it can collect ambient sounds while the vehicle is in motion, such as the friction sound of tires hitting the curb or abnormal bearing noise, to alert the user to abnormal vehicle conditions and thus increase driving safety.

[0003] However, with current external microphones, foreign objects can easily enter the pickup holes, leading to a decrease in microphone sound pickup and even damage to the microphone. Utility Model Content

[0004] This application discloses an installation plate, a microphone module, a sound receiving device, and a terminal, which can reduce the risk of foreign objects such as water flow, dust, airflow, or sharp objects impacting the sound pickup hole, thereby ensuring good microphone sound reception and avoiding microphone damage.

[0005] The first aspect of this application provides a mounting plate for mounting a microphone module. The microphone module includes a microphone and a mounting plate. The microphone has a pickup hole, and the mounting plate has a through hole. The mounting plate has a through hole that penetrates the mounting plate along its thickness direction. Along the thickness direction of the mounting plate, the pickup hole, the through hole, and the through hole are sequentially connected, and at least a portion of the through hole is offset from the pickup hole.

[0006] Typically, a microphone has a cavity that connects to a pickup hole. Inside the cavity are components such as a waterproof and dustproof mesh, a sound processor, and a circuit board. External sound enters the microphone cavity through the through-hole, perforation, and pickup hole. The sound waves cause the diaphragm to vibrate. A signal conversion component converts the diaphragm vibration into an electrical signal, which is then transmitted to the circuit board. After processing, the circuit board can transmit the signal to a storage device for storage or playback.

[0007] In this application, the pickup hole and the through hole are connected by a perforation, and at least a portion of the through hole on the mounting plate is offset from the pickup hole. This not only ensures that the microphone has a good frequency response curve, but also prevents foreign objects such as water, dust, airflow, and sharp objects from directly impacting the pickup hole through the through hole. This prevents foreign objects from entering the cavity through the pickup hole, thus preventing signal conversion components, circuit boards, and waterproof and dustproof mesh inside the cavity from malfunctioning or even being damaged by foreign objects.

[0008] In one possible implementation of the first aspect, the mounting plate includes a body portion and a shielding portion, the shielding portion and the body portion being fixedly connected; the through hole includes at least one sub-through hole, and the sub-through hole surrounds the shielding portion; the shielding portion and the pickup hole are opposite to each other.

[0009] By providing at least one sub-through hole, the through hole, perforation, and pickup hole are sequentially connected, allowing external sound to smoothly enter the microphone cavity through these three points. The shielding portion surrounding the sub-through hole protects the pickup hole from direct impact by foreign objects.

[0010] In one possible implementation of the first aspect, both the pickup hole and the perforation can be circular holes, and the pickup hole and the perforation are set coaxially, which can increase the structural compactness of the radio equipment.

[0011] In one possible implementation of the first aspect, the shielding portion is circular, and at least one sub-through hole is arc-shaped.

[0012] When the shielding part is circular and the area of ​​the through hole on the mounting plate is fixed, setting the sub-through hole to be arc-shaped makes a large area of ​​the outer periphery of the shielding part become part of the inner wall of the sub-through hole, thereby increasing the area of ​​the sub-through hole and improving the microphone's sound pickup effect.

[0013] In one possible implementation of the first aspect, the inner wall surface of at least one sub-through hole includes a first arc-shaped wall surface and a second arc-shaped wall surface; the first arc-shaped wall surface of at least one sub-through hole is located on a first circle, and the second arc-shaped wall surface of at least one sub-through hole is located on a second circle, with the first arc-shaped wall surface and the second arc-shaped wall surface facing each other radially along the first circle; the first circle, the second circle, and the circle containing the shielding portion share the same center, the diameter of the first circle is larger than the diameter of the second circle, and the diameter of the second circle is the same as the diameter of the circle containing the shielding portion.

[0014] The pickup hole and perforation share the same center with the first circle, which increases the structural compactness. The sub-through hole and the shielding part share the second arc-shaped wall surface, which can achieve the largest opening area while obtaining the best protection effect, so as to ensure frequency response performance.

[0015] In one possible implementation of the first aspect, the through hole includes a sub-through hole, and the inner wall surface of the sub-through hole further includes a first side wall and a second side wall, which are opposite to each other along the circumference of the first circle; the blocking part is connected to the body part through the connecting part, and the first side wall and the second side wall are located on opposite sides of the connecting part along the circumference of the first circle; the line connecting one end of the first arcuate wall of the sub-through hole to the center of the first circle is L1, and the line connecting the other end of the first arcuate wall of the sub-through hole to the center of the first circle is L2, and the included angle between L1 and L2 is greater than 180 degrees and less than 360 degrees.

[0016] A through-hole consists of only one sub-through-hole. Therefore, the area of ​​this sub-through-hole can be set to be relatively large, which can increase the connection area between the through-hole and the perforation, improve the sound reception effect, and enhance the frequency response performance.

[0017] In one possible implementation of the first aspect, the through hole includes two or more sub-through holes, which are arranged sequentially at intervals along the circumference of the first circle, and a connecting portion is formed between any two adjacent sub-through holes, and the blocking portion is connected to the main body portion through the connecting portion.

[0018] Setting up multiple sub-through holes and multiple connecting parts can not only improve the microphone's sound pickup effect and frequency response performance, but also increase the connection strength between the shielding part and the main body, preventing the shielding part from detaching from the main body and avoiding the shielding part from failing to protect the pickup hole.

[0019] In one possible implementation of the first aspect, two or more sub-vias are arranged at equal intervals along the circumference of the first circle. The sub-vias are all identical in shape and size.

[0020] This allows sound to be transmitted evenly to the pickup hole, improving sound reception and frequency response. Correspondingly, multiple connecting parts are arranged at equal intervals along the circumference of the first circle. These connecting parts are all the same shape and size to ensure balanced force distribution on the shielding part, improving its stability, further reducing the risk of the shielding part detaching from the main body, and enhancing the aesthetics of the mounting plate.

[0021] In one possible implementation of the first aspect, there is a relationship between the vertex A of the right triangle formed by the thickness H2 of the mounting plate and the inner diameter D2 of at least one sub-through hole, and the thickness H2 of the mounting plate. Specifically, H2, D2, and A satisfy the following relationship:

[0022]

[0023] There are related relationships among the following: the vertex A of the right triangle formed by the thickness H2 of the mounting plate and the inner diameter D2 of at least one sub-through hole; the gap D1 between the edge of the pickup hole and the edge of at least one sub-through hole; the inner diameter D2 of at least one sub-through hole; the thickness H1 of the fixing plate; and the thickness H2 of the mounting plate. Specifically, D1, D2, H1, H2, and A satisfy the following relationship (Equation 2):

[0024]

[0025] In relation 2, D2, H1, and H2 are known conditions.

[0026] Based on relation one and relation two, we can obtain the following relation three:

[0027]

[0028] Since D2, H1, and H2 are known conditions, D1 can be calculated according to relation three.

[0029] After calculating D1, the radius R of the first circle can be calculated according to the following formula four, which also allows us to calculate the area of ​​the region on the mounting plate where through holes need to be made, in order to facilitate the machining of the through holes. Formula four:

[0030]

[0031] Where D0 is the diameter of the pickup hole, and D0 is a known condition.

[0032] Furthermore, the radius R1 of the obstructed part, which is also the radius R1 of the second circle, can be calculated according to the following relation five: Relation five:

[0033]

[0034] By designing a reasonable radius for the shielding part, the shielding part can better cover the pickup hole, preventing foreign objects from impacting the pickup hole and preventing foreign objects from entering the microphone cavity and affecting the microphone performance.

[0035] In one possible implementation of the first aspect, a mounting plate is stacked and fixed between the microphone and the mounting plate.

[0036] The second aspect of this application provides a microphone module for use in a sound receiving device, the sound receiving device including a mounting plate; the mounting plate has a through hole that penetrates the mounting plate along its thickness direction; the microphone module includes a microphone and a fixing plate; the microphone has a pickup hole; the fixing plate has a through hole that penetrates the fixing plate along its thickness direction; the fixing plate is stacked and fixed between the microphone and the mounting plate; along the thickness direction of the fixing plate, the pickup hole, the through hole, and the through hole are sequentially connected, and at least a portion of the through hole is offset from the pickup hole.

[0037] In one possible implementation of the second aspect, the diameter of the perforation at the end facing the pickup hole is less than or equal to the diameter of the perforation at the end away from the pickup hole, and the diameter of the perforation at the end away from the pickup hole is greater than the diameter of the pickup hole.

[0038] The diameter of the perforation at the end furthest from the pickup hole is larger than the diameter of the pickup hole. This allows for the placement of the periphery of the through hole and the perforation opposite each other, while the middle of the pickup hole and the perforation are opposite each other. This ensures that the pickup hole and the through hole can be connected through the perforation for sound pickup, while also allowing the pickup hole and the through hole to be staggered to prevent foreign objects from impacting the pickup hole and to prevent foreign objects from entering the cavity and causing abnormalities or damage to the components inside the cavity.

[0039] When the diameter of the perforation facing the pickup hole is equal to the diameter of the perforation away from the pickup hole, the perforation is circular, and its radius remains constant along the thickness direction of the fixing plate, which facilitates processing.

[0040] When the diameter of the perforation facing the pickup hole is smaller than the diameter of the end of the perforation away from the pickup hole, this design reduces the risk of foreign objects entering the pickup hole through the perforation. Furthermore, since the radio equipment needs to collect low-frequency sounds, reducing the size of the perforation increases the resonant frequency of the radio equipment, optimizes the low-frequency response, and improves the frequency response performance of the radio equipment.

[0041] In one possible implementation of the second aspect, the diameter of the perforation facing the pickup hole is less than or equal to the diameter of the pickup hole.

[0042] The smaller size of the perforation increases the resonant frequency of the radio equipment, improving its frequency response performance. Furthermore, it prevents the smaller end of the perforation from facing the pickup hole, thus avoiding impacts from small-diameter foreign objects and enhancing protection.

[0043] In one possible implementation of the second aspect, the inner diameter of the perforation gradually increases along the direction from the microphone to the fixed plate.

[0044] In one possible implementation of the second aspect, the perforation includes a first sub-perforation and a second sub-perforation coaxially connected, with the inner diameter of the first sub-perforation being smaller than the inner diameter of the second sub-perforation along the thickness direction of the fixing plate; the end of the first sub-perforation away from the second sub-perforation faces the microphone, and the first sub-perforation is connected to the pickup hole; the end of the second sub-perforation away from the first sub-perforation faces the mounting plate, and the second sub-perforation is connected to the through hole.

[0045] In one possible implementation of the second aspect, the perforation includes a first sub-perforation and a second sub-perforation coaxially connected, wherein the diameter of the end of the first sub-perforation away from the second sub-perforation is larger than the diameter of the end of the first sub-perforation facing the second sub-perforation; the end of the first sub-perforation away from the second sub-perforation faces the microphone, and the first sub-perforation is connected to the pickup hole; the end of the second sub-perforation away from the first sub-perforation faces the mounting plate, and the second sub-perforation is connected to the through hole.

[0046] Along the thickness direction of the fixing plate, the diameter of the through hole in the middle is smaller than the diameter at both ends. The smaller diameter in the middle of the through hole can trap very small foreign objects, preventing them from impacting the pickup hole. The larger diameter at both ends of the through hole ensures good sound reception.

[0047] In one possible implementation of the second aspect, the diameter of the first sub-perforation gradually decreases along the direction from the microphone to the fixed plate.

[0048] In one possible implementation of the second aspect, the first sub-perforation includes a first stepped hole and a second stepped hole that are coaxially connected, the diameter of the first stepped hole being larger than the diameter of the second stepped hole; the end of the first stepped hole away from the second stepped hole faces the microphone, and the first stepped hole and the pickup hole are connected; the end of the second stepped hole away from the first stepped hole is connected to the second sub-perforation.

[0049] In one possible implementation of the second aspect, the thickness of the fixing plate is less than or equal to 1 mm.

[0050] It can prevent foreign particles with an outer diameter of 1mm or more from entering the pickup hole and affecting the performance of the radio equipment. Furthermore, the thinner the fixing plate, the smaller the perforation volume, which can further improve the frequency response performance of the radio equipment.

[0051] A third aspect of this application provides a recording device, comprising: a mounting plate according to any one of the first aspects of this application and a microphone module according to any one of the second aspects of this application. The beneficial effects of the recording device can be seen in the beneficial effects of the first and second aspects.

[0052] In one possible implementation of the third aspect, the through-hole and the pickup hole are completely offset along the thickness direction of the mounting plate, and a gap exists between the edge of the pickup hole and the edge of the through-hole along a direction perpendicular to the thickness of the mounting plate. More specifically, a gap exists between the edge of the pickup hole and the edge of at least one sub-through hole.

[0053] This gap ensures that no matter what angle a foreign object enters the through hole, it will not pass directly through the hole and into the pickup hole.

[0054] In one possible implementation of the third aspect, a first windproof cotton is provided inside the through hole, and / or a second windproof cotton is provided inside the perforation.

[0055] The first and second windproof cotton layers can further reduce the risk of foreign objects impacting the microphone hole, improve the protective effect, and also reduce wind noise.

[0056] In one possible implementation of the third aspect, the mounting plate and the microphone are integrally formed, or the mounting plate, the mounting plate and the microphone are integrally formed; or the mounting plate and the mounting plate are integrally formed.

[0057] A fourth aspect of this application provides a mounting plate applied to a radio receiving device. The radio receiving device includes a microphone and a mounting plate. The microphone has a pickup hole, and the mounting plate has a through hole. The mounting plate has a perforation, and the pickup hole, the perforation, and the through hole are sequentially connected along the thickness direction of the mounting plate. At least a portion of the through hole is offset from the pickup hole.

[0058] In one possible implementation of the fourth aspect, the microphone, the fixing plate, and the mounting plate are stacked and fixed in sequence, so that the pickup hole, the perforation, and the through hole are connected in sequence.

[0059] In one possible implementation of the fourth aspect, the diameter of the perforation at the end facing the pickup hole is less than or equal to the diameter of the perforation at the end away from the pickup hole, and the diameter of the perforation at the end away from the pickup hole is greater than the diameter of the pickup hole.

[0060] In one possible implementation of the fourth aspect, the diameter of the perforation facing the pickup hole is less than or equal to the diameter of the pickup hole.

[0061] In one possible implementation of the fourth aspect, the inner diameter of the perforation gradually increases along the direction from the microphone to the fixed plate.

[0062] In one possible implementation of the fourth aspect, the perforation includes a first sub-perforation and a second sub-perforation that are coaxially connected. Along the thickness direction of the mounting plate, the inner diameter of the first sub-perforation is smaller than the inner diameter of the second sub-perforation. The end of the first sub-perforation away from the second sub-perforation faces the microphone, and the first sub-perforation is connected to the pickup hole. The end of the second sub-perforation away from the first sub-perforation faces the mounting plate, and the second sub-perforation is connected to the through hole.

[0063] In one possible implementation of the fourth aspect, the perforation includes a first sub-perforation and a second sub-perforation coaxially connected, wherein the diameter of the end of the first sub-perforation away from the second sub-perforation is larger than the diameter of the end of the first sub-perforation facing the second sub-perforation; the end of the first sub-perforation away from the second sub-perforation faces the microphone, and the first sub-perforation is connected to the pickup hole; the end of the second sub-perforation away from the first sub-perforation faces the mounting plate, and the second sub-perforation is connected to the through hole.

[0064] In one possible implementation of the fourth aspect, the diameter of the first sub-perforation gradually decreases along the direction from the microphone to the fixed plate.

[0065] In one possible implementation of the fourth aspect, the first sub-perforation includes a first stepped hole and a second stepped hole that are coaxially connected, the diameter of the first stepped hole being larger than the diameter of the second stepped hole; the end of the first stepped hole away from the second stepped hole faces the microphone, and the first stepped hole and the pickup hole are connected; the end of the second stepped hole away from the first stepped hole is connected to the second sub-perforation.

[0066] In one possible implementation of the fourth aspect, the thickness of the fixing plate is less than or equal to 1 mm.

[0067] For the benefits of the fourth aspect of this application, please refer to the benefits of the second aspect.

[0068] The fifth aspect of this application provides a terminal, which includes: a mounting plate of any one of the first aspects of this application, or a microphone module of any one of the second aspects of this application, or a sound receiving device of the third aspect of this application, or a fixing plate of the fourth aspect of this application.

[0069] In one possible implementation of the fifth aspect, the terminal is a vehicle, drone, or robot.

[0070] In one possible implementation of the fifth aspect, the terminal includes a housing, and the mounting plate is part of the housing.

[0071] In one possible implementation of the fifth aspect, the terminal includes a housing with a mounting hole extending through the housing along its thickness direction; a mounting plate is fixedly embedded in the mounting hole.

[0072] For the benefits of the fifth aspect of this application, please refer to the benefits of the first to fourth aspects of this application. Attached Figure Description

[0073] Figure 1 This is a schematic diagram of the structure of an installation plate provided in an embodiment of this application.

[0074] Figure 2 This is a schematic diagram of the structure of a microphone module provided in an embodiment of this application.

[0075] Figure 3 yes Figure 2 The diagram shows a cross-sectional view of the microphone in the microphone module shown.

[0076] Figure 4 This is a schematic diagram of the structure of a radio receiving device provided in an embodiment of this application.

[0077] Figure 5 yes Figure 4 A schematic diagram of the structure of the radio device shown from another perspective.

[0078] Figure 6 yes Figure 4 The radio device shown is a cross-sectional view.

[0079] Figure 7 This is a partial cross-sectional view of another radio receiving device provided in an embodiment of this application.

[0080] Figure 8 yes Figure 1 A partial structural schematic diagram of the mounting plate shown from another perspective.

[0081] Figure 9 yes Figure 8 Enlarged diagram of point A in the diagram.

[0082] Figure 10 This is a schematic diagram of another mounting plate provided in an embodiment of this application.

[0083] Figure 11 This is a schematic diagram of another mounting plate provided in the embodiments of this application.

[0084] Figure 12 This is a schematic diagram of another mounting plate provided in the embodiments of this application.

[0085] Figure 13 This is a schematic diagram of another mounting plate provided in the embodiments of this application.

[0086] Figure 14 This is a simplified partial structural diagram of a radio device provided in an embodiment of this application.

[0087] Figure 15 This is a partial cross-sectional view of a radio device provided in an embodiment of this application.

[0088] Figure 16 This is a partial cross-sectional view of another radio receiving device provided in the embodiments of this application.

[0089] Figure 17 This is a partial cross-sectional view of another radio receiving device provided in the embodiments of this application.

[0090] Figure 18 This is a partial cross-sectional view of another radio receiving device provided in the embodiments of this application.

[0091] Figure 19 This is a partial cross-sectional view of another radio receiving device provided in the embodiments of this application.

[0092] Figure 20 This is a partial cross-sectional view of another radio receiving device provided in the embodiments of this application.

[0093] Figure 21 This is a schematic diagram of the structure of a terminal provided in an embodiment of this application.

[0094] Figure 22 yes Figure 21 A partial cross-sectional view of the terminal shown.

[0095] Figure 23 yes Figure 21 Another partial cross-sectional view of the terminal shown. Detailed Implementation

[0096] The embodiments of this application are described below with reference to the accompanying drawings.

[0097] The use of prefixes such as "first" and "second" in this scheme is solely for distinguishing different descriptive objects and does not limit the position, order, priority, quantity, or content of the described objects. For example, the number of described objects is not limited by the prefixes and can be one or more; for instance, in "first device," the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the described object is "device," then "first device" and "second device" can be the same device, devices of the same type, or devices of different types. In summary, the use of prefixes to distinguish descriptive objects in this application does not constitute a limitation on the described objects. The description of the described objects is based on the claims or the context of the embodiments, and the use of such prefixes should not constitute unnecessary restrictions.

[0098] To facilitate understanding, the relevant terms that may be involved in the embodiments of this application will be introduced below.

[0099] Two components are molded as one piece: The two components are formed into a single whole through processes such as injection molding and casting. There is no physical gap between the two components. The materials of the two components are bonded at the molecular or atomic level, and the structure is continuous without any breaks.

[0100] The two components are connected by fasteners: the two components are fixed by fasteners such as bolts, nuts, screws, rivets, and adhesives. The two components are locked together by the mechanical force of the fasteners. The materials of the two components are discontinuous and there is an interface.

[0101] The above terms may optionally be used in the embodiments described below.

[0102] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a mounting plate 100 provided in an embodiment of this application. This application provides a mounting plate 100 for mounting a microphone module 200. The structure of the mounting plate 100 is described below: The mounting plate 100 has a through hole 110 that penetrates the mounting plate 100 along its thickness direction. The mounting plate 100 includes a first mounting surface 120 and a second mounting surface 130, which are arranged opposite to each other along the thickness direction of the mounting plate 100. The through hole 110 penetrates both the first mounting surface 120 and the second mounting surface 130. The mounting plate 100 is a thin plate and can be in a regular shape such as circular, square, elliptical, triangular, or parallelogram, or it can be an irregular shape. The mounting plate 100 can be made of materials such as metal or plastic, and this application is not limited to these materials.

[0103] Please refer to Figure 2 , Figure 2This is a schematic diagram of the structure of a microphone module 200 provided in an embodiment of this application. This application also provides a microphone module 200, which includes a microphone 210 and a fixing plate 220.

[0104] The structure of the fixing plate 220 is described below: The fixing plate 220 has a through hole 230 that penetrates the fixing plate 220 along its thickness direction. The fixing plate 220 includes a first fixing surface 221 and a second fixing surface 222, which are arranged opposite to each other along the thickness direction of the fixing plate 220. The through hole 230 penetrates both the first fixing surface 221 and the second fixing surface 222. The fixing plate 220 can be in a regular shape such as circular, square, elliptical, triangular, or parallelogram, or it can be an irregular shape. The shape of the fixing plate 220 can be the same as or different from that of the mounting plate 100. The fixing plate 220 can be made of plastic or metal.

[0105] The structure of microphone 210 is described below: Microphone 210 has a pickup hole 211. Microphone 210 has a pickup surface 212, which is part of the outer surface of microphone 210. The pickup hole 211 penetrates the pickup surface 212, so that external sound can be transmitted into the interior of microphone 210 through the pickup hole 211, facilitating microphone pickup. The number of pickup holes 211 can be one, two, three, or four, etc. The number of through holes 110 is the same as the number of pickup holes 211, and the number of through holes 230 is the same as the number of pickup holes 211.

[0106] Please refer to some possible implementation methods. Figure 3 , Figure 3 yes Figure 2 The diagram shows a cross-sectional view of the microphone 210 in the microphone module 200. The microphone 210 may include an upper cover 213 and a lower cover 214. The upper cover 213 may be a frame-shaped structure with an opening on one side. The upper cover 213 and the lower cover 214 are fixedly connected, with the lower cover 214 closing the opening of the upper cover 213. The upper cover 213 and the lower cover 214 may be fixedly connected by means of snaps, bolts, nuts, screws, welding, or adhesive. The upper cover 213 and the lower cover 214 enclose a cavity 215. A pickup hole 211 is disposed on the lower cover 214, communicating with the cavity 215, and the pickup hole 211 may penetrate the lower cover 214 along its thickness direction. The surface of the upper cover 213 facing away from the lower cover 214 is the pickup surface 212. The microphone 210 may also include components such as a microphone sleeve (not shown) and a damping mesh (not shown).

[0107] The cavity 215 can be equipped with components such as a waterproof and dustproof mesh 216, a sound processor 217, and a circuit board 218. The waterproof and dustproof mesh 216 can prevent water, dust, airflow, and sharp objects from impacting the pickup hole 211. The sound processor 217 may include a diaphragm or a signal conversion component, such as a voice coil or a polarizing power supply.

[0108] When external sound enters the cavity 215 through the pickup hole 211 of the microphone 210, the sound wave will cause the diaphragm to vibrate. The signal conversion component can convert the diaphragm vibration into an electrical signal. The electrical signal can be transmitted to the circuit board 218. After the circuit board 218 processes the electrical signal, it can be transmitted to the storage device for storage or to the playback device for playback, etc.

[0109] Please refer to Figure 4 , Figure 5 and Figure 6 , Figure 4 This is a schematic diagram of the structure of a radio receiving device 300 provided in an embodiment of this application. Figure 5 yes Figure 4 A structural schematic diagram of the radio receiving device 300 shown from another perspective. Figure 6 yes Figure 4 The image shows a cross-sectional view of the audio receiving device 300. This application also provides an audio receiving device 300, which includes a mounting plate 100 provided in any embodiment of this application and a microphone module 200 provided in any embodiment. That is, the microphone module 200 and the mounting plate 100 are assembled to form the audio receiving device 300, and a fixing plate 220 is stacked and fixed between the mounting plate 100 and the microphone 210. The pickup surface 212 is in contact with the first fixing surface 221, and the second fixing surface 222 is in contact with the first mounting surface 120.

[0110] Along the thickness direction of the mounting plate 100, the pickup hole 211, the through hole 230, and the through hole 110 are connected in sequence, and at least a portion of the through hole 110 is offset from the pickup hole 211. Sound from outside the microphone 210 can pass through the through hole 110, the through hole 230, and the pickup hole 211 in sequence and enter the cavity 215 of the microphone 210.

[0111] At least a portion of the through hole 110 is misaligned with the pickup hole 211, including the following two cases:

[0112] The first type: a portion of the through hole 110 is offset from the pickup hole 211, while another portion of the through hole 110 is opposite to the pickup hole 211. That is, along the thickness direction of the mounting plate 100, a portion of the orthogonal projection of the through hole 110 onto the microphone 210 covers the pickup surface 212, and the other portion covers the pickup hole 211.

[0113] The second type: the entire through hole 110 is offset from the perforation 230. That is, along the thickness direction of the mounting plate 100, the orthogonal projection of the through hole 110 on the microphone 210 completely covers the pickup surface 212.

[0114] In the relevant technology, the entire through hole 110 is opposite to the pickup hole 211. Therefore, external high-pressure water flow, dust, airflow and sharp objects will directly impact the pickup hole 211 from the through hole 110. In particular, large particles of foreign matter entering the pickup hole 211 and then entering the cavity 215 from the pickup hole 211 can easily lead to a deterioration in the sound reception of the microphone 210, or even damage to the microphone 210.

[0115] In this embodiment, a fixing plate 220 is provided between the microphone 210 and the mounting plate 100, and a through hole 230 is provided on the fixing plate 220, such that the entire through hole 110 is connected to the through hole 230, and the entire pickup hole 211 is also connected to the through hole 230. That is, along the thickness direction of the fixing plate 220, the orthographic projection of the through hole 110 on the fixing plate 220 completely covers the through hole 230, and the orthographic projection of the pickup hole 211 on the fixing plate 220 also completely covers the through hole 230. This ensures that the sound transmitted to the through hole 110 is transmitted to the pickup hole 211 through the through hole 230 with substantially no loss.

[0116] At least a portion of the through-hole 110 is offset from the pickup hole 211, and the offset portion of the through-hole 110 and the pickup hole 211 is opposite to the pickup surface 212. Therefore, foreign objects entering the through-hole 110 will be blocked by the pickup surface 212, which can prevent foreign objects such as dust, high-pressure water flow, airflow and sharp objects from flowing directly into the pickup hole 211 from the through-hole 110, thereby preventing foreign objects from entering the cavity 215 from the pickup hole 211, preventing foreign objects from affecting the circuit board 218 and sound processor 217 and other devices inside the cavity 215, and preventing foreign objects from impacting the waterproof and dustproof mesh 216 inside the cavity 215, which can prevent the microphone 210 from losing its sound reception effect and prevent the microphone 210 from being damaged.

[0117] Please refer to some possible implementation methods. Figure 6 Both the pickup hole 211 and the through hole 230 can be circular holes, and the pickup hole 211 and the through hole 230 are set to be coaxial, which can increase the structural compactness of the radio equipment 300.

[0118] Please refer to some possible implementation methods. Figure 7 , Figure 7This is a partial cross-sectional view of another sound-receiving device 300 provided in an embodiment of this application. A first windproof cotton 400 is provided inside the through hole 110, and / or a second windproof cotton 410 is provided inside the perforation 230. Specifically, there are three scenarios: First, the first windproof cotton 400 is provided inside the through hole 110. Second, the second windproof cotton 410 is provided inside the perforation 230. Third, the first windproof cotton 400 is provided inside the through hole 110, and the second windproof cotton 410 is provided inside the perforation 230. By providing the first windproof cotton 400 and / or the second windproof cotton 410, foreign objects can be prevented from entering the through hole 110 and / or the perforation 230, thus better protecting the pickup hole 211 and reducing wind noise.

[0119] Please refer to some possible implementation methods. Figure 8 , Figure 8 yes Figure 1 The diagram shows a partial structural view of the mounting plate 100 from another perspective. The mounting plate 100 includes a main body 140 and a shielding portion 150, which are fixedly connected. The through hole 110 includes at least one sub-through hole 111, and the sub-through hole 111 surrounds the shielding portion 150. Please also refer to... Figure 6 The shielding portion 150 and the pickup hole 211 are opposite each other. "The shielding portion 150 and the pickup hole 211 are opposite each other" means that, along the thickness direction of the mounting plate 100, the orthographic projection of the pickup hole 211 onto the mounting plate 100 is entirely located on the shielding portion 150. The area of ​​the shielding portion 150 can be greater than or equal to the area of ​​the orthographic projection of the pickup hole 211.

[0120] By providing at least one sub-through hole 111, the through hole 110, the perforation 230, and the pickup hole 211 are sequentially connected, allowing external sound to smoothly enter the cavity 215 of the microphone 210 through the through hole 110, the perforation 230, and the pickup hole 211. The shielding portion 150 surrounded by the sub-through hole 111 protects the pickup hole 211, preventing foreign objects from directly entering it.

[0121] Please refer to some possible implementation methods. Figure 8The shielding portion 150 is circular, and at least one sub-through hole 111 is arc-shaped. The outer peripheral surface of the shielding portion 150, which connects to the first mounting surface 120 and the second mounting surface 130, is part of the inner wall surface of the sub-through hole 111. With the shielding portion 150 being circular and the area of ​​the through hole 110 on the mounting plate 100 fixed, setting the sub-through hole 111 to be arc-shaped allows a larger area of ​​the outer peripheral surface of the shielding portion 150 to become part of the inner wall surface of the sub-through hole 111, thereby increasing the area of ​​the sub-through hole 111 and improving the sound pickup effect of the microphone 210. In other words, when the sub-through hole 111 is arc-shaped, the maximum opening area can be obtained while achieving optimal protection, ensuring frequency response performance. The radial width of the sub-through hole 111 along the first circle 170 can be 1.5 mm, allowing the mounting plate 100 to protect against foreign particles with an outer diameter of 1.5 mm or more.

[0122] Please refer to some possible implementation methods. Figure 8 The inner wall surface of at least one sub-through hole 111 includes a first arc-shaped wall surface 112 and a second arc-shaped wall surface 113; the first arc-shaped wall surface 112 of at least one sub-through hole 111 is located on a first circle 170, and the second arc-shaped wall surface 113 of at least one sub-through hole 111 is located on a second circle 180, with the first arc-shaped wall surface 112 and the second arc-shaped wall surface 113 facing each other radially along the first circle 170. The blocking portion 150 is circular, and the second arc-shaped wall surface 113 of at least one sub-through hole 111 is also part of the outer peripheral surface of the blocking portion 150. The first circle 170, the second circle 180, and the circle containing the blocking portion 150 share a common center, the diameter of the first circle 170 is larger than the diameter of the second circle 180, and the diameter of the second circle 180 is the same as the diameter of the circle containing the blocking portion 150. That is, at least one sub-through hole 111 and the shielding part 150 are located within an annular region, with the shielding part 150 located at the center of the annular region and at least one sub-through hole 111 located at the periphery of the annular region. The pickup hole 211 and the through hole 230 also share the same center with the first circle 170, which can increase the structural compactness of the radio receiving device 300. That is, the sub-through hole 111 and the shielding part 150 share the second arc-shaped wall surface 113, which can obtain the largest opening area while achieving the best protection effect, so as to ensure frequency response performance. And a circular shielding part 150 is obtained, so that the effective area protected by the shielding part 150 is maximized.

[0123] Please refer to some possible implementation methods. Figure 8The through hole 110 includes two or more sub-through holes 111, which are arranged sequentially at intervals along the circumference of the first circle 170. A connecting portion 160 is formed between any two adjacent sub-through holes 111. The blocking portion 150 is connected to the main body portion 140 through the connecting portion 160. The connecting portion 160 is located at the outer edge of the first circle 170 and connected to the main body portion 140. The connecting portion 160 is located at the inner periphery of the second circle 180 and connected to the blocking portion 150.

[0124] Please refer to Figure 9 , Figure 9 yes Figure 8 The enlarged schematic diagram at point A is shown. The arbitrary sub-through hole 111 also includes a first sidewall 114 and a second sidewall 115, which are opposite each other along the circumference of the first circle 170. The first sidewall 114 and the second sidewall 115 are also the outer surfaces of the connecting portion 160. The fan-shaped space enclosed by the first sidewall 114, the second sidewall 115, the first arc-shaped wall 112, and the second arc-shaped wall 113 is the sub-through hole 111. The following explains the relationship between the outer surface of the connecting portion 160, the first sidewall 114, and the second sidewall 115: Multiple sub-through holes 111 include adjacent first sub-through holes 116 and second sub-through holes 117, and a first connecting portion 161 is formed between the first sub-through holes 116 and the second sub-through holes 117. The first side wall 114 of the first sub-through hole 116 and the second side wall 115 of the second sub-through hole 117 are located on opposite sides of the first connecting part 161 along the circumference of the first circle 170.

[0125] The multiple sub-through holes 111 and multiple connecting parts 160 can improve the sound pickup effect and frequency response performance of the microphone 210, and also increase the connection strength between the shielding part 150 and the main body part 140, preventing the shielding part 150 and the main body part 140 from detaching and avoiding the shielding part 150 from failing to protect the pickup hole 211.

[0126] The through-hole 110 can specifically include two, three, four, five, or six sub-through-holes 111, etc. Several specific implementation methods are listed below:

[0127] First option: Please refer to Figure 8 The through hole 110 includes six sub-through holes 111, which are arranged sequentially at intervals around the circumference of the first circle 170. A connecting portion 160 is formed between any two adjacent sub-through holes 111, forming a total of six connecting portions 160. The shielding portion 150 is connected to the main body portion 140 through the six connecting portions 160, which enhances the connection strength between the shielding portion 150 and the main body portion 140 and reduces the risk of the shielding portion 150 detaching from the main body portion 140.

[0128] The second option: Please refer to... Figure 10 , Figure 10 This is a schematic diagram of another mounting plate 100 provided in this application embodiment. The through hole 110 includes two sub-through holes 111, and two connecting portions 160 are formed between the two sub-through holes 111. The two sub-through holes 111 can increase the communication area between the through hole 110 and the through hole 230, and the two connecting portions 160 can improve the connection strength between the shielding portion 150 and the main body portion 140, and can also increase the aesthetics of the mounting plate 100.

[0129] The third option: Please refer to... Figure 11 , Figure 11 This is a schematic diagram of another mounting plate 100 provided in this application embodiment. The through hole 110 includes four sub-through holes 111, and four connecting portions 160 are formed between the four sub-through holes 111. This can increase the communication area between the through hole 110 and the through hole 230, improve the stability of the shielding portion 150, and also increase the aesthetics of the mounting plate 100.

[0130] The fourth type: Please refer to... Figure 12 , Figure 12 This is a schematic diagram of another mounting plate 100 provided in this application embodiment. The through hole 110 includes three sub-through holes 111, and three connecting portions 160 are formed between the three sub-through holes 111. This can improve the sound reception effect, increase the connection strength between the blocking portion 150 and the main body portion 140, and improve the aesthetics of the mounting plate 100.

[0131] Please refer to some possible implementation methods. Figures 10 to 12 Two or more sub-through holes 111 are arranged at equal intervals along the circumference of the first circle 170, and the shape and size of the multiple sub-through holes 111 are all the same. This allows the sound to be transmitted evenly to the pickup hole 211, improving the sound reception effect. Correspondingly, multiple connecting parts 160 are arranged at equal intervals along the circumference of the first circle 170, and the shape and size of the multiple connecting parts 160 are all the same, so that the force on the shielding part 150 is balanced, improving the stability of the shielding part 150, further reducing the risk of the shielding part 150 detaching from the main body part 140, and improving the aesthetics of the mounting plate 100.

[0132] In other possible implementations, two or more sub-through holes 111 are arranged at unequal intervals along the circumference of the first circle 170. Designers can choose the arrangement of multiple sub-through holes 111 according to actual needs, which improves the applicability of the embodiments of this application.

[0133] For other possible implementations, please refer to [link / reference]. Figure 13 , Figure 13This is a schematic diagram of another mounting plate 100 provided in the embodiments of this application. The through hole 110 includes a sub-through hole 111, and the inner wall surface of the sub-through hole 111 further includes a first side wall surface 114 and a second side wall surface 115. Along the circumference of the first circle 170, the first side wall surface 114 and the second side wall surface 115 are opposite to each other. The shielding part 150 is connected to the body part 140 through the connecting part 160, and the first side wall surface 114 and the second side wall surface 115 are located on opposite sides of the connecting part 160 along the circumference of the first circle 170.

[0134] The line connecting one end of the first arc-shaped wall 112 of a sub-through hole 111 to the center of the first circle 170 is L1, and the line connecting the other end of the first arc-shaped wall 112 of a sub-through hole 111 to the center of the first circle 170 is L2. The included angle between L1 and L2 is greater than 180 degrees and less than 360 degrees. That is, the through hole 110 includes only one sub-through hole 111. Therefore, the area of ​​this sub-through hole 111 can be set to be larger, which can increase the connection area between the through hole 110 and the through hole 230, increase the sound reception effect, and improve the frequency response performance.

[0135] For one possible implementation, please refer to Figure 14 , Figure 14 This is a simplified partial structural diagram of a radio receiving device 300 provided in an embodiment of this application. Along the thickness direction of the mounting plate 100, the through hole 110 and the pickup hole 211 are completely offset, and along the direction perpendicular to the thickness of the mounting plate 100, i.e., along the radial direction of the pickup hole 211, there is a gap between the edge of the pickup hole 211 and the edge of the through hole 110. More specifically, there is a gap between the edge of the pickup hole 211 and the edge of at least one sub-through hole 111. This gap ensures that no matter what angle a foreign object enters the through hole 110, it will not directly pass through the through hole 230 and enter the pickup hole 211. That is, the cavity formed after the mounting plate 100 opens the through hole 110 does not allow any object to directly impact the pickup hole 211 from the outside.

[0136] The following describes how to calculate the width of the gap between the edge of the pickup hole 211 and the edge of at least one sub-through hole 111.

[0137] Please refer to some possible implementation methods. Figure 14 There is a correlation between the vertex A of the right triangle formed by the thickness H2 of the mounting plate 100 and the inner diameter D2 of at least one sub-through hole 111, the inner diameter D2 of at least one sub-through hole 111, and the thickness H2 of the mounting plate 100.

[0138] There is a relationship between the vertex A of the right triangle formed by the thickness H2 of the mounting plate 100 and the inner diameter D2 of at least one sub-through hole 111, the gap D1 between the edge of the pickup hole 211 and the edge of at least one sub-through hole 111, the inner diameter D2 of at least one sub-through hole 111, the thickness H1 of the fixing plate 220 and the thickness H2 of the mounting plate 100.

[0139] In one specific implementation, the vertex A of the right triangle formed by the thickness H2 of the mounting plate 100 and the inner diameter D2 of at least one sub-through hole 111, and the inner diameter D2 of at least one sub-through hole 111, satisfy the following relationship with the thickness H2 of the mounting plate 100:

[0140]

[0141] In relation one, D2 and H2 are known conditions.

[0142] The vertex A of the right triangle formed by the thickness H2 of the mounting plate 100 and the inner diameter D2 of at least one sub-through hole 111, the gap D1 between the outer periphery of the pickup hole 211 and the outer periphery of the shielding part 150, the inner diameter D2 of at least one sub-through hole 111, the thickness H1 of the fixing plate 220 and the thickness H2 of the mounting plate 100 satisfy the following relationship:

[0143]

[0144] In relation 2, D2, H1, and H2 are known conditions.

[0145] Based on relation one and relation two, we can obtain the following relation three:

[0146]

[0147] Since D2, H1, and H2 are known conditions, the gap D1 can be calculated according to relation three.

[0148] After calculating the gap D1, the radius R of the first circle 170 can be calculated according to the following formula four, which also allows us to calculate the area of ​​the region on the mounting plate 100 where the through hole 110 needs to be made, so that the through hole 110 can be machined. Formula four:

[0149]

[0150] Where D0 is the diameter of the pickup hole 211, and D0 is a known condition.

[0151] Furthermore, the radius R1 of the obstruction portion 150, which is also the radius R1 of the second circle 180, can be calculated according to the following relation five: Relation five:

[0152]

[0153] For example, the diameter D0 of the pickup hole 211 is 5mm, the thickness H1 of the fixing plate 220 is 1mm, the thickness H2 of the mounting plate 100 is 3mm, and the inner diameter D2 of the sub-through hole 111 is 2.5mm. Based on these known conditions, the apex angle A can be calculated to be 39.8 degrees, and D1 to be 0.83mm. Therefore, R = 0.83 + 2.5 + 2.5 = 5.83mm. The radius R1 of the blocking part 150 is: R1 = 0.83 + 2.5 = 3.33mm. R1 can be taken as 3.5mm to allow for redundancy.

[0154] In some possible implementations, the thickness H1 of the fixing plate 220 is less than or equal to 1 mm. This can prevent foreign particles with an outer diameter of 1 mm or more from entering the pickup hole 211 and affecting the performance of the radio receiver 300. Furthermore, the smaller the thickness of the fixing plate 220, the smaller the volume of the perforation 230, which can further improve the frequency response performance of the radio receiver 300. In this embodiment, the bandwidth of the radio receiver 300 is less than or equal to 8 kHz, exhibiting good frequency response performance.

[0155] Please refer to some possible implementation methods. Figure 15 , Figure 15 This is a partial cross-sectional view of a radio receiving device 300 provided in an embodiment of this application. The diameter of the end of the perforation 230 away from the pickup hole 211 is larger than the diameter of the pickup hole 211. This allows for the peripherals of the through hole 110 and the perforation 230 to be opposite each other, while the middle portions of the pickup hole 211 and the perforation 230 are opposite each other. This ensures that the pickup hole 211 and the through hole 110 can be connected through the perforation 230 for sound pickup, while also allowing the pickup hole 211 and the through hole 110 to be staggered to prevent foreign objects from impacting the pickup hole 211. The diameter of the end of the perforation 230 facing the pickup hole 211 is equal to the diameter of the end of the perforation 230 away from the pickup hole 211. The perforation 230 is a circular hole, and its radius remains constant along the thickness direction of the fixing plate 220, which facilitates processing.

[0156] For other possible implementations, please refer to [link / reference]. Figure 16 , Figure 16This is a partial cross-sectional view of another type of radio receiving device 300 provided in this application embodiment. The diameter of the end of the perforation 230 away from the pickup hole 211 is larger than the diameter of the pickup hole 211. The diameter of the end of the perforation 230 facing the pickup hole 211 is smaller than the diameter of the end of the perforation 230 away from the pickup hole 211, and the diameter of the end of the perforation 230 facing the pickup hole 211 can be larger than the diameter of the pickup hole 211. This design, on the one hand, can reduce the risk of foreign objects impacting the pickup hole 211 through the perforation 230. On the other hand, the radio receiving device 300 can be used for voice interaction, voice recognition, special vehicle sensing, etc. The sound waves that the radio receiving device 300 needs to collect are usually human voices, tire rolling sounds, special vehicle alarms, etc., which are all low-frequency sounds. Reducing the volume of the perforation 230 can increase the resonant frequency of the radio receiving device 300, so that the resonance of the radio receiving device 300 occurs in the high-frequency range, improving the frequency response performance in the low-frequency range.

[0157] The sensitivity of microphone 210 increases at higher frequencies. This increase in sensitivity is caused by the interaction between the air in the sound inlet and the air in the front chamber of microphone 210. Here, the sound inlet includes the perforation 230, and the front chamber of microphone 210 refers to the portion of the microphone 210 cavity near the pickup port 211. This interaction produces a Helmholtz resonance, similar to the phenomenon of sound produced when air is blown into a bottle. As with a bottle, a smaller air volume produces a higher resonant frequency, while a larger air volume produces a lower resonant frequency. Higher resonant frequencies affect the frequency response performance in the high-frequency range, while lower resonant frequencies affect the frequency response performance in the low-frequency range.

[0158] The effective sound required by the radio receiver 300 is in the low-frequency range, therefore it is desirable for the resonant frequency to be in the high-frequency range to avoid resonance affecting the frequency response performance in the low-frequency range. Increasing the resonant frequency can be achieved by reducing the volume of the sound inlet, that is, by reducing the volume of the perforation 230.

[0159] It can be seen that the radio receiver 300 provided in this application embodiment can obtain effective frequency response characteristics under the premise of effectively preventing foreign objects from entering the interior of the radio receiver 300, that is, under the premise of effective protection.

[0160] Please refer to some possible implementation methods. Figure 17 , Figure 17This is a partial cross-sectional view of another type of radio receiving device 300 provided in this application embodiment. The diameter of the end of the perforation 230 facing the pickup hole 211 is smaller than the diameter of the end of the perforation 230 away from the pickup hole 211, and the diameter of the end of the perforation 230 facing the pickup hole 211 is less than or equal to the diameter of the pickup hole 211. That is, the diameter of one end of the perforation 230 is larger than the diameter of the other end, and the end of the perforation 230 with a larger diameter faces the mounting plate 100 and is connected to the through hole 110 of the mounting plate 100. The end of the perforation 230 with a smaller diameter faces the microphone 210 and is connected to the pickup hole 211 of the microphone 210. The small size of the perforation 230 can increase the resonant frequency of the radio receiving device 300 and improve the frequency response performance of the radio receiving device 300. Furthermore, it can prevent the smaller end of the perforation 230 from facing the pickup hole 211, and can prevent small foreign objects from impacting the pickup hole 211, thus increasing the protective effect.

[0161] The following describes several specific ways to implement the condition that the diameter of the end of the perforation 230 facing the pickup hole 211 is smaller than the diameter of the end of the perforation 230 away from the pickup hole 211:

[0162] For a specific implementation method, please refer to Figure 16 and Figure 17 Along the direction from microphone 210 to fixed plate 220, the inner diameter of perforation 230 gradually increases. That is, the inner diameter of perforation 230 changes continuously, and perforation 230 is roughly horn-shaped. This achieves the desired orientation of perforation 230. At this time, the relationship between the diameter of the end of perforation 230 facing the pickup hole 211 and the diameter of the pickup hole 211 can be as follows:

[0163] The first type, such as Figure 16 As shown, the diameter of the perforation 230 facing the pickup hole 211 is larger than the diameter of the pickup hole 211. This can improve the sound reception effect.

[0164] The second type, such as Figure 17 As shown in (a), the diameter of the end of the perforation 230 facing the pickup hole 211 is equal to the diameter of the pickup hole 211. This can improve the sound reception effect.

[0165] The third type, such as Figure 17 As shown in (b), the diameter of the perforation 230 facing the pickup hole 211 is smaller than the diameter of the pickup hole 211. This ensures good sound reception while reducing the risk of foreign objects impacting the pickup hole 211.

[0166] For another specific implementation method, please refer to Figure 18The perforation 230 includes a first sub-perforation 231 and a second sub-perforation 232 coaxially connected. Along the thickness direction of the fixing plate 220, the inner diameter of the first sub-perforation 231 is smaller than the inner diameter of the second sub-perforation 232. That is, the perforation 230 is a two-stage stepped hole, and along the thickness direction of the fixing plate 220, the inner diameters of both the first sub-perforation 231 and the second sub-perforation 232 remain unchanged. The end of the first sub-perforation 231 away from the second sub-perforation 232 faces the microphone 210, and the first sub-perforation 231 is connected to the pickup hole 211; the end of the second sub-perforation 232 away from the first sub-perforation 231 faces the mounting plate 100, and the second sub-perforation 232 is connected to the through hole 110. At this time, the relationship between the diameter of the end of the perforation 230 facing the pickup hole 211 and the diameter of the pickup hole 211 can be as follows: First, such as... Figure 18 As shown in (a), the diameter of the perforation 230 facing the pickup hole 211 is larger than the diameter of the pickup hole 211. The second type, as shown... Figure 18 In (b), the diameter of the end of the perforation 230 facing the pickup hole 211 is equal to the diameter of the pickup hole 211. The third type, such as... Figure 18 As shown in (c), the diameter of the perforation 230 facing the pickup hole 211 is smaller than the diameter of the pickup hole 211.

[0167] For another specific implementation method, please refer to... Figure 19 , Figure 19 This is a partial cross-sectional view of another radio receiving device 300 provided in this application embodiment. The perforation 230 includes a first sub-perforation 231 and a second sub-perforation 232 coaxially connected. The diameter of the end of the first sub-perforation 231 away from the second sub-perforation 232 is larger than the diameter of the end of the first sub-perforation 231 facing the second sub-perforation 232. That is, the first sub-perforation 231 has a structure that is larger at the top and smaller at the bottom.

[0168] The end of the first sub-perforation 231 furthest from the second sub-perforation 232 faces the microphone 210, and the first sub-perforation 231 is connected to the pickup hole 211; the end of the second sub-perforation 232 furthest from the first sub-perforation 231 faces the mounting plate 100, and the second sub-perforation 232 is connected to the through hole 110. That is, along the thickness direction of the mounting plate 220, the diameter of the middle part of the through hole 110 is smaller than the diameters of its two ends. The smaller diameter of the middle part of the through hole 110 can trap very small foreign objects, preventing them from impacting the pickup hole 211. The larger diameters at both ends of the through hole 110 ensure good sound reception.

[0169] The diameter of the end of the first sub-perforation 231 away from the second sub-perforation 232 is larger than the diameter of the end of the first sub-perforation 231 facing the second sub-perforation 232, specifically including the following situations:

[0170] For the first option, please refer to... Figure 19Along the direction from microphone 210 to fixing plate 220, the diameter of the first sub-perforation 231 gradually decreases. That is, the first sub-perforation 231 is flared. And at this time, as... Figure 19 As shown in (a), the diameter of the first sub-perforation 231 facing the pickup hole 211 can be larger than the diameter of the pickup hole 211, and the diameter of the first sub-perforation 231 away from the pickup hole 211 can be equal to the diameter of the pickup hole 211. Figure 19 As shown in (b), the diameter of the first sub-perforation 231 facing the pickup hole 211 can be equal to the diameter of the pickup hole 211, and the diameter of the first sub-perforation 231 away from the pickup hole 211 can be smaller than the diameter of the pickup hole 211. The first sub-perforation 231 can prevent foreign objects smaller than the diameter of the pickup hole 211 from impacting the pickup hole 211, thereby preventing foreign objects from entering the cavity of the microphone and preventing the microphone from malfunctioning or even being damaged.

[0171] The second option, please refer to Figure 20 The first sub-perforation 231 includes a first stepped hole 233 and a second stepped hole 234 coaxially connected. The diameter of the first stepped hole 233 is larger than the diameter of the second stepped hole 234. The end of the first stepped hole 233 away from the second stepped hole 234 faces the microphone 210, and the first stepped hole 233 is connected to the pickup hole 211. The end of the second stepped hole 234 away from the first stepped hole 233 is connected to the second sub-perforation 232. That is, the first sub-perforation 231 has a two-step shape. And at this time, as... Figure 20 As shown in (a), the diameter of the first sub-perforation 231 facing the pickup hole 211 can be larger than the diameter of the pickup hole 211, and the diameter of the first sub-perforation 231 away from the pickup hole 211 can be equal to the diameter of the pickup hole 211. Figure 20 As shown in (b), the diameter of the first sub-perforation 231 facing the pickup hole 211 can also be equal to the diameter of the pickup hole 211, and the diameter of the first sub-perforation 231 away from the pickup hole 211 can be smaller than the diameter of the pickup hole 211.

[0172] In some possible implementations, the mounting plate 220 and the microphone 210 are integrally formed. That is, when machining the microphone 210, more specifically, when machining the lower cover 214 of the microphone 210, the mounting plate 220 is integrally formed onto the lower cover 214. Optionally, the mounting plate 220 and the microphone 210 can also be connected by fasteners, including adhesives, bolts, nuts, or screws.

[0173] In other possible implementations, the fixing plate 220, mounting plate 100, and microphone 210 are integrally formed. That is, when manufacturing the microphone 210, the fixing plate 220 and mounting plate 100 are both integrally formed on the lower cover 214. Alternatively, the fixing plate 220, mounting plate 100, and microphone 210 can also be connected by fasteners.

[0174] In some other possible implementations, the fixing plate 220 and the mounting plate 100 are integrally formed. That is, when processing the mounting plate 100, the fixing plate 220 is integrally formed onto the fixing plate 220. Optionally, the fixing plate 220 and the mounting plate 100 can also be connected by fasteners.

[0175] Please refer to Figure 21 , Figure 21 This is a structural schematic diagram of a terminal 1000 provided in an embodiment of this application. This application also provides a terminal 1000, which includes: a mounting plate 100 in any embodiment of this application, or a fixing plate 220 in any embodiment of this application, or a microphone module 200 in any embodiment of this application, or a recording device 300 in any embodiment of this application.

[0176] Terminal 1000 can be a vehicle, drone, robot, or other intelligent terminal 1000 or means of transportation. It should be understood that "vehicle" here is a broad concept, encompassing means of transportation (such as commercial vehicles, passenger cars, motorcycles, flying cars, trains, etc.), industrial vehicles (such as forklifts, trailers, tractors, etc.), engineering vehicles (such as excavators, bulldozers, cranes, etc.), agricultural equipment (such as lawnmowers, harvesters, etc.). Similarly, "robot" can refer to automated guided vehicles (AGVs), walking conversational robots, service robots, etc.

[0177] Please refer to some possible implementation methods. Figure 22 , Figure 22 yes Figure 21The diagram shows a partial cross-sectional view of the terminal 1000. The terminal 1000 includes a housing 1100, and a mounting plate 100 is a part of the housing 1100. When the terminal 1000 is used in a vehicle, the housing 1100 can be a protective panel on the vehicle's undercarriage. During the manufacturing of the terminal 1000, through holes 110 are directly machined into the housing 1100 so that a part of the housing 1100 becomes the mounting plate 100. When the radio device 300 is applied to a vehicle, the entire radio device 300 is located outside the vehicle's cabin. The radio device 300 can be used for voice interaction, voice recognition, and special vehicle sensing. The radio device 300 has a good frequency response curve, and its frequency response curve does not significantly deteriorate after installation in a vehicle. That is, the radio device 300 can collect ambient sounds when the vehicle is in motion, such as bearing noise. It can also collect the sound of pedestrians walking or talking outside the vehicle. The audio receiver 300 can interact with the controller inside the vehicle via voice. For example, it allows the driver and passengers inside the vehicle to communicate with people outside the vehicle. The driver can also issue commands such as unlocking or starting the vehicle from outside the vehicle. The audio receiver 300 can send the collected sound to the controller inside the vehicle, and the controller inside the vehicle can execute the corresponding playback command, unlock command, or start command.

[0178] For other possible implementations, please refer to [link / reference]. Figure 23 , Figure 23 yes Figure 21 Another partial cross-sectional view of the terminal 1000 shown. The terminal 1000 includes a housing 1100, which has a mounting hole 1200 extending through the housing 1100 along its thickness direction; a mounting plate 100 is fixedly embedded in the mounting hole 1200. When manufacturing the terminal 1000, the mounting hole 1200 is machined on the housing 1100, and then the mounting plate 100 is fixed in the mounting hole 1200.

[0179] The above are merely some embodiments and implementation methods of this application. The scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A mounting plate for mounting a microphone module, the microphone module comprising a microphone and a mounting plate, the microphone having a pickup hole and the mounting plate having a through hole; characterized in that, The mounting plate is provided with a through hole, which penetrates the mounting plate along its thickness direction; Along the thickness direction of the mounting plate, the pickup hole, the through hole, and the through hole are connected in sequence, and at least a portion of the through hole is offset from the pickup hole.

2. The mounting plate of claim 1, wherein The mounting plate includes a main body and a shielding part, the shielding part and the main body are fixedly connected; the through hole includes at least one sub-through hole, and at least one sub-through hole surrounds the shielding part; the shielding part and the pickup hole are opposite to each other.

3. The mounting plate of claim 2, wherein, The shielding part is circular, and at least one of the sub-through holes is arc-shaped.

4. The mounting plate of claim 3, wherein, The inner wall surface of at least one of the sub-through holes includes a first arc-shaped wall surface and a second arc-shaped wall surface; the first arc-shaped wall surface of at least one of the sub-through holes is located on a first circle, and the second arc-shaped wall surface of at least one of the sub-through holes is located on a second circle, with the first arc-shaped wall surface and the second arc-shaped wall surface being radially opposite to each other along the first circle; The first circle, the second circle, and the circle containing the obstruction share a common center. The diameter of the first circle is larger than the diameter of the second circle, and the diameter of the second circle is the same as the diameter of the circle containing the obstruction.

5. The mounting plate according to claim 4, characterized in that, The through hole includes a sub-through hole, and the inner wall surface of the sub-through hole further includes a first side wall surface and a second side wall surface. Along the circumference of the first circle, the first side wall surface and the second side wall surface are opposite to each other. The shielding part is connected to the main body part through the connecting part, and the first side wall surface and the second side wall surface are located on opposite sides of the connecting part along the circumference of the first circle; The line connecting one end of the first arc-shaped wall of one of the sub-through holes to the center of the first circle is L1, and the line connecting the other end of the first arc-shaped wall of one of the sub-through holes to the center of the first circle is L2. The included angle between L1 and L2 is greater than 180 degrees and less than 360 degrees.

6. The mounting plate according to claim 4, characterized in that, The through hole includes two or more sub-through holes, which are arranged sequentially at intervals along the circumference of the first circle, and a connecting portion is formed between any two adjacent sub-through holes. The blocking portion is connected to the main body portion through the connecting portion.

7. The mounting plate according to claim 6, characterized in that, Two or more of the sub-through holes are arranged at equal intervals along the circumference of the first circle.

8. The mounting plate according to any one of claims 2 to 7, characterized in that, There is a correlation between the vertex angle (A) of the right triangle formed by the thickness (H2) of the mounting plate and the inner diameter (D2) of at least one of the sub-through holes, and the inner diameter (D2) of at least one of the sub-through holes, and the thickness (H2) of the mounting plate. There is a correlation between the vertex angle (A) of the right triangle formed by the thickness (H2) of the mounting plate and the inner diameter (D2) of at least one of the sub-through holes, the gap (D1) between the edge of the pickup hole and the edge of at least one of the sub-through holes, the inner diameter (D2) of at least one of the sub-through holes, the thickness (H1) of the fixing plate, and the thickness (H2) of the mounting plate.

9. The mounting plate according to any one of claims 1 to 7, characterized in that, The fixing plate is stacked and fixed between the microphone and the mounting plate.

10. A microphone module, applied to a sound receiving device, the sound receiving device comprising a mounting plate; the mounting plate having a through hole extending through the mounting plate along its thickness direction; characterized in that, The microphone module includes: a microphone and a mounting plate; The microphone is equipped with a pickup hole; The fixing plate is provided with a through hole, which penetrates the fixing plate along the thickness direction; The fixing plate is stacked and fixed between the microphone and the mounting plate; Along the thickness direction of the fixing plate, the pickup hole, the through hole and the through hole are connected in sequence, and at least a portion of the through hole is offset from the pickup hole.

11. The microphone module according to claim 10, characterized in that, The diameter of the perforation at the end facing the pickup hole is less than or equal to the diameter of the perforation at the end away from the pickup hole, and the diameter of the perforation at the end away from the pickup hole is greater than the diameter of the pickup hole.

12. The microphone module according to claim 11, characterized in that, The diameter of the perforation facing the pickup hole is less than or equal to the diameter of the pickup hole.

13. The microphone module according to claim 11 or 12, characterized in that, The inner diameter of the perforation gradually increases along the direction from the microphone to the fixed plate.

14. The microphone module according to claim 11 or 12, characterized in that, The perforation includes a first sub-perforation and a second sub-perforation that are coaxially connected. Along the thickness direction of the fixing plate, the inner diameter of the first sub-perforation is smaller than the inner diameter of the second sub-perforation. The end of the first sub-perforation away from the second sub-perforation faces the microphone, and the first sub-perforation is connected to the pickup hole; the end of the second sub-perforation away from the first sub-perforation faces the mounting plate, and the second sub-perforation is connected to the through hole.

15. The microphone module according to claim 11 or 12, characterized in that, The perforation includes a first sub-perforation and a second sub-perforation that are coaxially connected, wherein the diameter of the end of the first sub-perforation away from the second sub-perforation is larger than the diameter of the end of the first sub-perforation facing the second sub-perforation. The end of the first sub-perforation away from the second sub-perforation faces the microphone, and the first sub-perforation is connected to the pickup hole; the end of the second sub-perforation away from the first sub-perforation faces the mounting plate, and the second sub-perforation is connected to the through hole.

16. The microphone module according to any one of claims 10 to 12, characterized in that, The thickness of the fixing plate is less than or equal to 1 mm.

17. A radio receiving device, characterized in that, include: The mounting plate according to any one of claims 1 to 9 and the microphone module according to any one of claims 10 to 16.

18. The radio receiving device according to claim 17, characterized in that, Along the thickness direction of the mounting plate, the through hole and the pickup hole are completely offset, and along the direction perpendicular to the thickness of the mounting plate, there is a gap between the edge of the pickup hole and the edge of the through hole.

19. The radio receiving device according to claim 17 or 18, characterized in that, The through hole is provided with a first windproof cotton, and / or the perforation is provided with a second windproof cotton.

20. The radio receiving device according to claim 17 or 18, characterized in that, The fixing plate and the microphone are integrally formed, or the fixing plate, the mounting plate and the microphone are integrally formed; or the fixing plate and the mounting plate are integrally formed.

21. A terminal, characterized in that, The terminal includes: a mounting plate according to any one of claims 1 to 9, or a microphone module according to any one of claims 10 to 16, or a recording device according to claims 17 to 20.

22. The terminal according to claim 21, characterized in that, The terminal can be a vehicle, drone, or robot.

23. The terminal according to claim 21 or 22, characterized in that, The terminal includes a housing, and the mounting plate is part of the housing.

24. The terminal according to claim 21 or 22, characterized in that, The terminal includes a housing with a mounting hole that extends through the housing along its thickness direction; the mounting plate is fixedly embedded in the mounting hole.

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