A moving coil microphone and a microphone

Abstract

This utility model belongs to the technical field of microphone accessories, and discloses a dynamic microphone core and a microphone. The dynamic microphone core includes a top cover assembly, a diaphragm, a magnetic circuit assembly, a sound chamber, and a base assembly. The diaphragm and the magnetic circuit assembly are sequentially fastened between the top cover assembly and the sound chamber. The magnetic circuit assembly includes an outer sleeve, a U-shaped magnet, and a siphon. The outer sleeve includes a receiving groove with a clearance hole. The siphon and the magnet are both placed inside the U-shaped magnet, with the siphon positioned above the magnet. The siphon passes through the clearance hole and is separated from the diaphragm. The U-shaped magnet is snapped into the receiving groove. The base assembly and the sound chamber are detachably connected. Placing the diaphragm and magnetic circuit assembly between the interlocking top cover assembly and the sound chamber restricts their movement. The U-shaped magnet is snapped into the receiving groove, which is not glued. This improves the assembly efficiency of the U-shaped magnet and allows it to be installed in the ideal position, preventing misalignment after installation, reducing magnetic leakage of the dynamic microphone coil, improving its sensitivity and sound quality, and enhancing the microphone user experience.

Description

Technical Field

[0001] This utility model relates to the field of microphone accessories technology, and in particular to a dynamic microphone core and a microphone. Background Technology

[0002] Microphones are widely used in daily life, work, and entertainment activities, such as speeches, meetings, and singing. In a microphone, the microphone core converts sound signals into electrical signals, which are then transmitted to a speaker connected to the microphone to amplify the sound. The most common type of microphone core is the dynamic microphone core, which utilizes electromagnetic induction to convert sound signals into electrical signals.

[0003] In existing dynamic microphone cores, the U-shaped iron in the internal magnetic circuit assembly is mostly assembled by gluing. This not only results in low assembly efficiency, but also causes the position of the U-shaped iron to deviate significantly from the ideal installation position. As a result, existing dynamic microphone cores suffer from severe magnetic leakage, low sensitivity, and poor sound quality, which affects the user experience of the microphone. Utility Model Content

[0004] The purpose of this invention is to provide a dynamic microphone core and microphone that can solve the problems of existing dynamic microphone cores, where the U-shaped iron in the internal magnetic circuit components is mostly assembled by gluing, resulting in low assembly efficiency and a significant deviation of the U-shaped iron position from the ideal installation position. Existing dynamic microphone cores suffer from serious magnetic leakage, low sensitivity, poor sound quality, and a poor microphone user experience.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] On the one hand, this utility model provides a dynamic microphone core, comprising:

[0007] A dynamic microphone core, comprising:

[0008] The system comprises a top cover assembly, a diaphragm, a magnetic circuit assembly, a sound chamber, and a base assembly. The diaphragm and the magnetic circuit assembly are sequentially fastened between the top cover assembly and the sound chamber. The magnetic circuit assembly includes an outer sleeve, a magnet, a U-shaped iron, and a diaphragm. The outer sleeve includes a receiving groove with a clearance hole. The diaphragm and the magnet are both placed inside the U-shaped iron, with the diaphragm positioned above the magnet. The diaphragm passes through the clearance hole and is spaced apart from the diaphragm. The U-shaped iron is snapped and fixed within the receiving groove. The base assembly is detachably connected to the sound chamber.

[0009] As a preferred technical solution for dynamic microphone cores, the inner cavity of the receiving groove is provided with a plurality of first buckles at intervals, and the outer circumferential surface of the U-shaped iron is provided with a first annular groove, and the plurality of first buckles are fitted into the first annular groove.

[0010] As a preferred technical solution for dynamic microphone cores, the U-shaped iron is provided with a chamfer around one end of the receiving groove.

[0011] As a preferred technical solution for a dynamic microphone core, the sound chamber includes a receiving chamber and an extension column. The upper cover assembly is fastened to the outer wall of the receiving chamber. The upper end face of the receiving chamber is provided with a first protrusion. The side wall of the outer cover is provided with a limiting groove. The first protrusion is placed in the limiting groove. The base assembly is snapped into connection with the extension column.

[0012] As a preferred technical solution for a dynamic microphone core, the dynamic microphone core further includes damping cotton and a rubber ring. The extension column has a hollow structure and is connected to the receiving chamber. The interior of the extension column has a stepped surface. The damping cotton is placed inside the extension column and fits against the stepped surface. The rubber ring is placed inside the receiving chamber and fits against the bottom surface of the U-shaped iron.

[0013] As a preferred technical solution for dynamic microphone cores, the base assembly includes a shock-absorbing pad and a base, wherein the shock-absorbing pad is snapped into the extension post, and the base is snapped into the shock-absorbing pad.

[0014] As a preferred technical solution for dynamic microphone cores, the shock-absorbing pad is made of flexible material. The shock-absorbing pad includes a through hole, the inner wall of which is provided with a second annular groove, and the outer wall of the extension column is provided with a second protrusion, which is fitted into the second annular groove.

[0015] As a preferred technical solution for a dynamic microphone core, the magnetic circuit assembly further includes a magnet holder and a metal pressure plate. The magnet is mounted in the magnet holder, and the U-shaped iron has a central hole. The magnet, the magnet holder, and the metal pressure plate are all placed inside the central hole.

[0016] As a preferred technical solution for a dynamic microphone core, the upper cover assembly includes a cover plate, a sponge, a protective cover, and a protective cover fabric. The protective cover includes a receiving space, and a partition is provided within the receiving space. The partition divides the receiving space into an upper space and a lower space. The partition has multiple openings and a central pillar with a groove. The sponge is laid around the central pillar in the upper space. The cover plate is placed over the groove and pressed against the sponge. The lower space is fastened to the sound chamber. The protective cover fabric covers the outer periphery of the protective cover.

[0017] On the other hand, the present invention provides a microphone, including the aforementioned dynamic microphone core, and the microphone also includes a housing, in which the dynamic microphone core is placed.

[0018] The beneficial effects of this utility model are:

[0019] The dynamic microphone core provided by this utility model restricts the diaphragm and magnetic circuit assembly by placing them between the interlocking upper cover assembly and the sound chamber. Furthermore, by snapping the U-shaped iron into the receiving groove of the outer casing, compared to adhesive connections, it not only allows for faster installation of the U-shaped iron, improving assembly efficiency, but also ensures accurate installation of the U-shaped iron in the ideal position, avoiding significant deviations after installation. This reduces magnetic leakage in the dynamic microphone core, thereby improving its sensitivity and sound quality, and ultimately enhancing the user experience of microphones equipped with dynamic microphone cores. Attached Figure Description

[0020] Figure 1 This is an exploded view of the dynamic microphone core provided by this utility model;

[0021] Figure 2 This is a cross-sectional schematic diagram of the dynamic microphone core provided by this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the dynamic microphone core provided by this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the protective cover provided by this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the outer jacket provided by this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the U-shaped iron provided by this utility model;

[0026] Figure 7 This is a schematic diagram of the acoustic chamber provided by this utility model;

[0027] Figure 8 This is a cross-sectional schematic diagram of the shock-absorbing pad provided by this utility model;

[0028] Figure 9 This is a schematic diagram of the structure of the shock-absorbing pad provided by this utility model;

[0029] Figure 10 This is a structural schematic diagram of the base provided by this utility model.

[0030] In the picture:

[0031] 1. Top cover assembly; 11. Cover plate; 12. Sponge; 13. Protective cover; 131. Partition; 1311. Opening; 1312. Central column; 13121. Groove; 14. Protective cover fabric;

[0032] 2. Diaphragm;

[0033] 3. Magnetic circuit assembly; 31. Outer jacket; 311. Receiving groove; 3111. First buckle; 312. Clearance hole; 313. Limiting groove; 32. Magnet; 33. U-shaped iron; 331. First annular groove; 332. Chamfer; 34. Sweep; 35. Magnet fixing seat; 36. Metal pressure plate; 37. Silk cloth;

[0034] 4. Acoustic chamber; 41. Receiving chamber; 411. First protrusion; 42. Extension column; 421. Stepped surface; 422. Second protrusion;

[0035] 5. Base assembly; 51. Vibration damping pad; 511. Through hole; 5111. Second annular groove; 512. Mounting hole; 52. Base; 521. Second buckle;

[0036] 6. Damping cotton; 7. Rubber ring. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] like Figure 1 , Figure 2 and Figure 5 As shown, this utility model provides a dynamic microphone core, including a top cover assembly 1, a diaphragm 2, a magnetic circuit assembly 3, a sound chamber 4, and a base assembly 5. The diaphragm 2 and the magnetic circuit assembly 3 are sequentially positioned between the interlocking top cover assembly 1 and the sound chamber 4, thereby confining the diaphragm 2 and the magnetic circuit assembly 3. The magnetic circuit assembly 3 includes an outer sleeve 31, a magnet 32, a U-shaped iron 33, and a siphon 34. The outer sleeve 31 includes a receiving groove 311 with a clearance hole 312. The siphon 34 and the magnet 32 ​​are both placed inside the U-shaped iron 33, with the siphon 34 positioned above the magnet 32 ​​and passing through the clearance hole 312, spaced apart from the diaphragm 2. The U-shaped iron 33 is snapped and fixed within the receiving groove 311, and the base assembly 5 is detachably connected to the sound chamber 4. By snapping the U-shaped iron 33 into the receiving groove 311 of the outer casing 31, compared with glue connection, the installation of the U-shaped iron 33 can be completed quickly, improving the assembly efficiency of the U-shaped iron 33. At the same time, the snap-fit ​​assembly method can ensure that the U-shaped iron 33 is accurately installed in the ideal position, avoiding the situation where the U-shaped iron 33 deviates significantly from the ideal position after installation. This reduces the magnetic leakage of the dynamic microphone coil, improves the sensitivity and sound quality of the dynamic microphone core, and thus improves the user experience of the dynamic microphone core.

[0042] The core function of the magnetic circuit assembly 3 is to convert sound waves into electrical signals. The magnetic circuit assembly 3 also includes two side iron plates, which are located on both sides of the U-iron 33. The magnet 32, U-iron 33, Si Hua 34 and the two side iron plates can form a closed magnetic circuit, generating a uniform and stable magnetic field in the magnetic air gap. When the diaphragm 2 vibrates with the sound waves, the diaphragm 2 will cut the magnetic field lines in the magnetic field. The cutting of the magnetic field lines generates an induced current. The frequency and amplitude of the current are consistent with the sound waves, thereby realizing the conversion of sound signals into electrical signals.

[0043] The base assembly 5 and the acoustic chamber 4 are detachable, facilitating the disassembly of the dynamic microphone core. This allows for quick repair of the dynamic microphone core in case of malfunction, reducing the difficulty of repair. Furthermore, the base assembly 5 can be replaced according to the microphone housing specifications, increasing the flexibility of using the dynamic microphone core.

[0044] The magnetic circuit assembly 3 also includes a silk cloth 37, which is placed between the magnet 32 ​​and the diaphragm 2 to prevent dust and metal debris from the external environment from entering the magnetic circuit assembly 3, thus ensuring the stability of the magnetic circuit assembly 3 during long-term use.

[0045] Regarding the snap-fit ​​connection between U-shaped iron 33 and outer jacket 31, for example, as follows: Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, multiple first latches 3111 are spaced apart inside the receiving groove 311, and a first annular groove 331 is provided on the outer periphery of the U-shaped iron 33. The multiple first latches 3111 are engaged within the first annular groove 331. By providing multiple first latches 3111, the outer sleeve 31 can engage with the U-shaped iron 33 from multiple points, ensuring the stability of the U-shaped iron 33 installation and preventing misalignment of the U-shaped iron 33 when the microphone shakes. This allows the dynamic microphone core to maintain high sensitivity and high sound quality, further improving the microphone's user experience. Simultaneously, the spaced arrangement of the multiple first latches 3111 ensures balanced force distribution at all points after the U-shaped iron 33 and outer sleeve 31 are engaged, further improving the stability of the U-shaped iron 33 and reducing the risk of misalignment.

[0046] Furthermore, a chamfer 332 is provided around one end of the U-shaped iron 33 placed in the receiving cavity. By setting the chamfer 332, the U-shaped iron 33 can quickly enter the receiving groove 311 of the outer sleeve 31, further reducing the assembly difficulty of the U-shaped iron 33 and the outer sleeve 31, improving the assembly efficiency of the U-shaped iron 33, and thus improving the assembly efficiency of the moving coil microphone core, making the structural design of the U-shaped iron 33 more reasonable.

[0047] For example, such as Figure 1 , Figure 3 , Figure 5 and Figure 7 As shown, the acoustic chamber 4 includes a receiving chamber 41 and an extension post 42. The upper cover assembly 1 is fastened to the outer wall of the receiving chamber 41. A first protrusion 411 is provided on the upper end face of the receiving chamber 41. A limiting groove 313 is provided on the side wall of the outer jacket 31. The first protrusion 411 is placed in the limiting groove 313. The base assembly 5 is snapped into the extension post 42. This can limit the circumferential movement of the outer jacket 31, further improving the stability of the magnetic field generated by the magnetic circuit assembly 3. The base assembly 5 in the dynamic microphone core is snapped into the microphone shell and is also snapped into the extension post 42. The position of the acoustic chamber 4 is fixed. When the first protrusion 411 in the acoustic chamber 4 is inserted into the receiving groove 311 of the outer jacket 31, the outer jacket 31 can no longer rotate circumferentially. This achieves the circumferential limitation of the outer jacket 31, thereby limiting the internal components of the dynamic microphone core circumferentially.

[0048] Furthermore, such as Figure 1 , Figure 2 and Figure 7As shown, the dynamic microphone core also includes damping cotton 6 and a rubber ring 7. The extension post 42 has a hollow structure and is connected to the receiving chamber 41. The interior of the extension post 42 has a stepped surface 421. The damping cotton 6 is placed inside the extension post 42 and fits against the stepped surface 421. The damping cotton 6 can absorb excess vibrations generated in the sound chamber 4, reduce the mechanical movement of the internal diaphragm 2 of the dynamic microphone core, and reduce cavity resonance caused by it, making the sound transmitted by the microphone purer. At the same time, in noisy environments, the damping cotton 6 can further isolate external vibration interference and improve the directional pickup effect of the dynamic microphone core.

[0049] A rubber ring 7 is placed inside the receiving chamber 41, and the rubber ring 7 is in contact with the bottom surface of the U-iron 33. By placing the rubber ring 7 between the U-iron 33 and the acoustic chamber 4, the rubber ring 7 can absorb the mechanical vibration caused by the user holding the microphone or external noise to the internal parts of the microphone, preventing mechanical vibration from being transmitted into the acoustic chamber 4, reducing noise interference in the process of converting sound signals into electrical signals, and further improving the sensitivity of the dynamic microphone core. The rubber ring 7 can also improve the sealing between the U-iron 33 and the acoustic chamber 4, preventing moisture or dust from entering the magnetic circuit system, protecting the diaphragm 2 and the magnetic circuit assembly 3 from corrosion or physical damage, allowing the dynamic microphone core to be used in complex environments, thereby increasing the microphone's application scenarios. At the same time, the rubber ring 7 can also ensure that the U-iron 33 is tightly fitted to the receiving chamber 41 of the acoustic chamber 4, while avoiding hard contact between the U-iron 33 and the bottom surface of the receiving chamber 41, which would cause deformation of the U-iron 33 structure, further improving the stability of the magnetic field generated by the magnetic circuit assembly 3. Meanwhile, the rubber ring 7 can suppress air leakage in the sound chamber 4, which helps maintain the acoustic characteristics of the sound chamber 4 and makes the conversion of sound signals to electrical signals in the low-frequency range of the dynamic microphone core more stable.

[0050] For example, such as Figure 1 , Figure 7 , Figure 8 and Figure 9 As shown, the base assembly 5 includes a vibration damping pad 51 and a base 52. The vibration damping pad 51 is snapped into the extension post 42, and the base 52 is snapped into the vibration damping pad 51. The vibration damping pad 51 absorbs mechanical vibrations, preventing external impacts from being transmitted to the inside of the dynamic microphone core, thus avoiding low-frequency noise interference caused by vibration. Simultaneously, the vibration damping pad 51 disperses the impact force on the dynamic microphone core, reducing its failure rate and extending its service life. The snap-fit ​​connection between the vibration damping pad 51 and the extension post 42 simplifies the installation structure of the base assembly 5 and the sound chamber 4, facilitating disassembly and installation of both, and making maintenance of the dynamic microphone core easier. The snap-fit ​​connection between the base 52 and the vibration damping pad 51 allows for quick assembly of the base 52 and the vibration damping pad 51, improving the assembly efficiency of the base assembly 5 and consequently, the assembly efficiency of the dynamic microphone core.

[0051] For example, the vibration damping pad 51 is made of a flexible material. The vibration damping pad 51 includes a through hole 511, and a second annular groove 5111 is provided on the inner wall of the through hole 511. A second protrusion 422 is provided on the outer wall of the extension column 42, and the second protrusion 422 is engaged within the second annular groove 5111, so that the vibration damping pad 51 and the extension column 42 are connected in a snap-fit ​​manner to limit the axial movement of the sound chamber 4, thereby limiting the internal components of the dynamic microphone core in the axial direction. During assembly, the extension column 42 of the sound chamber 4 is inserted into the through hole 511. Because the vibration damping pad 51 is made of a flexible material, it deforms, allowing the extension column 42 to be smoothly inserted into the through hole 511. As the extension column 42 continues to be inserted, the second protrusion 422 will engage within the second annular groove 5111, thus completing the assembly of the sound chamber 4 and the vibration damping pad 51. Meanwhile, the first protrusion 411 of the sound chamber 4 and the limiting groove 313 of the outer sleeve 31 can limit the internal components of the moving coil microphone core in the circumferential direction. This can provide double limiting of the internal components of the moving coil microphone core in both the circumferential and axial directions, further improving the vibration resistance of the moving coil microphone core and extending its service life.

[0052] Regarding the snap-fit ​​connection between the base 52 and the shock-absorbing pad 51 in the base assembly 5, exemplarily, as follows: Figure 1 , Figure 2 , Figure 9 and Figure 10 As shown, the shock absorber 51 has multiple mounting holes 512, and the base 52 has multiple second buckles 521 spaced apart at one end facing the shock absorber 51. The multiple second buckles 521 are engaged with the multiple mounting holes 512 to enable the base 52 and the shock absorber 51 to be quickly assembled.

[0053] In this embodiment, as Figure 1 and Figure 2As shown, the magnetic circuit assembly 3 also includes a magnet holder 35 and a metal pressure plate 36. The magnet 32 ​​is fitted into the magnet holder 35. Specifically, the magnet holder 35 includes a central groove, with multiple locking protrusions circumferentially arranged on the inner wall of the central groove. The magnet 32 ​​is cylindrical and engages with the multiple locking protrusions for fixation. The magnet holder 35 positions the magnet 32, preventing it from shifting and making the magnetic field formed by the magnetic circuit assembly 3 more stable. This further improves the sensitivity of the dynamic microphone core in converting sound signals into electrical signals, enhancing the user experience of the dynamic microphone core. The surface of the locking protrusions facing the center of the magnet holder 35 is an arc surface, meaning the surface where the locking protrusions contact the magnet 32 ​​is an arc surface. This allows the multiple locking protrusions to better enclose the magnet 32, securing it more firmly within the central groove. The U-shaped iron 33 includes a central hole, within which the magnet 32, the magnet holder 35, and the metal pressure plate 36 are all placed, creating a magnetic field between the U-shaped iron 33, the magnet 32, the siphon 34, and the metal pressure plate 36. The metal pressure plate 36 is typically made of a high-permeability magnetic material (e.g., soft iron). Its core function is to optimize the magnetic circuit structure, efficiently guiding the magnetic field generated by the magnet 32 ​​to the air gap region where the diaphragm 2 is located. This further enhances the uniformity and intensity of the magnetic field generated by the magnetic circuit assembly 3, improving electromagnetic conversion efficiency. Simultaneously, the metal pressure plate 36 also assists in heat dissipation, dispersing the heat generated by the diaphragm 2 during operation and extending its lifespan. Furthermore, the metal pressure plate 36 suppresses external electromagnetic interference, ensuring the purity of the moving coil microphone signal transmission. Multiple protrusions are arranged around the inner wall of the central hole of the U-shaped iron 33, supporting the metal pressure plate 36.

[0054] In this embodiment, as Figure 1 , Figure 4 and Figure 5As shown, the upper cover assembly 1 includes a cover plate 11, a sponge 12, a protective cover 13, and a protective cover fabric 14. The protective cover 13 includes a receiving space, within which a partition 131 is provided, dividing the receiving space into an upper space and a lower space. The partition 131 has openings 1311 to allow sound to pass through the diaphragm 2. The partition 131 has a central pillar 1312 with a slot 13121. The sponge 12 is laid around the central pillar 1312 in the upper space. The cover plate 11 covers the slot 13121 and presses against the sponge 12. The lower space is fastened to the sound chamber 4. After the cover plate 11 is placed over the slot 13121, it can fix the sponge 12 and prevent the sponge 12 from falling off. By setting the sponge 12, the sponge 12 can effectively absorb the impact of high-frequency airflow (e.g., popping sounds) and can also filter some environmental noise, improving the purity of the recording. On the other hand, the sponge 12 also acts as a physical barrier, preventing saliva droplets, dust, and other foreign objects from entering the interior of the dynamic microphone core, thus avoiding contamination of the diaphragm 2 and the magnetic circuit assembly 3, and further extending the service life of the dynamic microphone core. The protective cover fabric 14 covers the outer periphery of the protective cover 13, protecting it.

[0055] This embodiment provides a microphone, including the aforementioned dynamic microphone core. The microphone also includes a housing, in which the dynamic microphone core is housed, and the housing protects the dynamic microphone core. The microphone of this embodiment has good sound quality and high sensitivity, providing customers with a better user experience.

[0056] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A dynamic microphone core, characterized in that, include: The assembly comprises a top cover (1), a diaphragm (2), a magnetic circuit assembly (3), a sound chamber (4), and a base assembly (5). The diaphragm (2) and the magnetic circuit assembly (3) are sequentially fastened between the top cover assembly (1) and the sound chamber (4). The magnetic circuit assembly (3) includes an outer sleeve (31), a magnet (32), a U-shaped iron (33), and a diaphragm (34). The outer sleeve (31) includes a receiving groove (311) with a clearance hole (312). The diaphragm (34) and the magnet (32) are both placed inside the U-shaped iron (33). The diaphragm (34) is located above the magnet (32). The diaphragm (34) passes through the clearance hole (312) and is spaced apart from the diaphragm (2). The U-shaped iron (33) is snapped and fixed inside the receiving groove (311). The base assembly (5) and the sound chamber (4) are detachably connected.

2. The dynamic microphone core according to claim 1, characterized in that, The receiving groove (311) is provided with a plurality of first buckles (3111) at intervals inside, and the outer peripheral surface of the U-shaped iron (33) is provided with a first annular groove (331), and the plurality of first buckles (3111) are fitted into the first annular groove (331).

3. The dynamic microphone core according to claim 2, characterized in that, The U-shaped iron (33) is placed at one end of the receiving groove (311) and has a chamfer (332).

4. The dynamic microphone core according to claim 1, characterized in that, The acoustic chamber (4) includes a receiving chamber (41) and an extension column (42). The upper cover assembly (1) is fastened to the outer wall of the receiving chamber (41). The upper end face of the receiving chamber (41) is provided with a first protrusion (411). The side wall of the outer sleeve (31) is provided with a limiting groove (313). The first protrusion (411) is placed in the limiting groove (313). The base assembly (5) is snapped into connection with the extension column (42).

5. The dynamic microphone core according to claim 4, characterized in that, The moving coil also includes damping cotton (6) and rubber ring (7). The extension column (42) is a hollow structure. The extension column (42) is connected to the receiving chamber (41). The interior of the extension column (42) is provided with a stepped surface (421). The damping cotton (6) is placed inside the extension column (42) and fits against the stepped surface (421). The rubber ring (7) is placed inside the receiving chamber (41) and fits against the bottom surface of the U-shaped iron (33).

6. The dynamic microphone core according to claim 4, characterized in that, The base assembly (5) includes a shock-absorbing pad (51) and a base (52). The shock-absorbing pad (51) is snapped into the extension column (42), and the base (52) is snapped into the shock-absorbing pad (51).

7. The dynamic microphone core according to claim 6, characterized in that, The shock absorber (51) is made of flexible material. The shock absorber (51) includes a through hole (511). The inner wall of the through hole (511) is provided with a second annular groove (5111). The outer wall of the extension column (42) is provided with a second protrusion (422). The second protrusion (422) is fitted into the second annular groove (5111).

8. The dynamic microphone core according to any one of claims 1-7, characterized in that, The magnetic circuit assembly (3) further includes a magnet holder (35) and a metal pressure plate (36). The magnet (32) is fitted into the magnet holder (35). The U-shaped iron (33) includes a central hole. The magnet (32), the magnet holder (35) and the metal pressure plate (36) are all placed in the central hole.

9. The dynamic microphone core according to any one of claims 1-7, characterized in that, The upper cover assembly (1) includes a cover plate (11), a sponge (12), a protective cover (13), and a protective cover fabric (14). The protective cover (13) includes a receiving space, and a partition (131) is provided in the receiving space. The partition (131) divides the receiving space into an upper space and a lower space. The partition (131) has multiple openings (1311). The partition (131) has a central column (1312). The central column (1312) has a slot (13121). The sponge (12) is laid around the central column (1312) in the upper space. The cover plate (11) covers the slot (13121) and is pressed against the sponge (12). The lower space is fastened to the sound chamber (4). The protective cover fabric (14) covers the outer periphery of the protective cover (13).

10. A microphone, characterized in that, The microphone includes a dynamic microphone core as described in any one of claims 1-9, and further includes a housing in which the dynamic microphone core is disposed.

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