Moving coil microphone core structure

Abstract

The utility model relates to the field of microphone cores, and discloses a moving coil microphone core structure which comprises a rear cavity shell, a middle shell is fixedly arranged on the rear cavity shell, and damping paper and tuning paper are fixedly arranged on the middle shell. A magnetic circuit is fixedly arranged in the middle shell, a voice diaphragm is fixed on the magnetic circuit, the voice diaphragm comprises a voice coil, a diaphragm is fixedly arranged on the voice coil, one end of the middle shell is fixedly connected with the rear cavity shell, an upper cover body is fixed at the other end of the middle shell, the upper cover body comprises a circular plate, an annular block is arranged on one side of the circular plate, and a ball top structure corresponding to the ball top of the voice diaphragm is arranged in the annular block. According to the utility model, the magnetic circuit, the base station on which the voice coil is adhered on the diaphragm and the ball top part at the annular block of the upper cover sink at least 0.3 mm more than that of a common normal structure. The sound quality is clear, full, loud, fine and smooth, the whole sound quality is free of noise, the sound quality restoration is fidelity, the sound quality is rich in elasticity, and the sound quality is suitable for karaoke, network live broadcast monitoring, network live broadcast, vehicle-mounted microphone cores, Bluetooth sound boxes, karaoke compartments and entertainment singing.

Description

Technical Field

[0001] The utility model relates to the technical field of microphone cores, in particular to a dynamic microphone core structure. Background Art

[0002] The microphone core is an important part of the microphone, which is used to receive sound. In actual use, the sound quality of the microphone core is easily affected.

[0003] In the prior art, the application number is CN202221250154.2, which discloses a tunable dynamic microphone core and a microphone, which includes a middle sleeve, one end of which is provided with a sound membrane vibration cavity; a magnetic field component installed in the cavity; and a sound chamber installed at the other end of the middle sleeve.

[0004] However, the dynamic microphone core mentioned in the prior art lacks the positioning and fixation of the sound membrane in the vibration cavity of the sound membrane during the actual sound pickup process, which easily causes the sound membrane to shift and vibrate, resulting in poor sound pickup effect of the sound membrane and noise in the recorded sound. Therefore, it is necessary to design a dynamic microphone core structure. Utility Model Content

[0005] The utility model aims to provide a dynamic microphone core structure to solve the problems in the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A dynamic microphone core structure, the microphone core structure comprising a rear cavity shell, a middle shell is fixedly arranged on the rear cavity shell, and damping paper and tuning paper are fixedly arranged in the middle shell;

[0008] A magnetic circuit is fixed in the middle shell body, a sound membrane is fixed on the magnetic circuit, the sound membrane includes a voice coil, a diaphragm is fixed on the voice coil, one end of the middle shell body is fixedly connected to the rear cavity shell body, and the other end is fixed with an upper cover body for fixing the sound membrane, the upper cover body includes a circular plate, and an annular block is arranged on one side of the circular plate.

[0009] Furthermore, the tuning paper is arranged in a ring shape in the middle shell body, the tuning paper is located on the outside of the damping paper, and the cover cotton is fixedly installed on the upper cover body.

[0010] Furthermore, a microphone core base is fixedly provided on the outer side of the rear cavity shell for fixing the dynamic microphone core structure, and a wiring board is fixedly provided below the microphone core base, and bolts are fixed on the wiring board.

[0011] Furthermore, a threaded hole is provided at one end of the rear cavity shell, and a mounting groove for mounting the middle shell is provided at the other end, and a bolt passes through the wiring board and is connected to the threaded hole.

[0012] Furthermore, a fixing groove is provided at one end of the middle shell, an opening groove is provided on the middle shell, and a PCB board is fixedly provided in the opening groove.

[0013] Furthermore, an annular groove is provided at one end of the magnetic circuit, and a connecting ring is fixedly provided on one side of the voice coil, and the connecting ring is connected to the annular groove.

[0014] Furthermore, the diaphragm is an annular arc surface structure, the edge height of the voice coil is lower than the height of the diaphragm, and a groove is provided in the voice coil.

[0015] Furthermore, the secondary outer diameter of the diaphragm is not greater than 22 mm, and the thickness of the diaphragm is 12-13 mm.

[0016] Furthermore, a ball top is fixedly provided on the circular plate, an annular plate is fixedly provided on the side of the circular plate, tuning holes distributed in an array are provided on the circular plate, an arc groove is provided on one side of the ball top, and the annular block cooperates with the groove.

[0017] Beneficial effects of the utility model:

[0018] 1. The dynamic microphone core structure of the utility model has a dynamic sound diaphragm structure designed inside the microphone, the magnetic circuit sinks at least 0.3mm, the sticky voice coil base on the diaphragm sinks at least 0.3mm, the secondary outer diameter of the diaphragm is not greater than 22mm, and the thickness of the diaphragm is 12-13mm, the annular block sinks at least 0.3mm, the sound diaphragm has a diaphragm and a voice coil whose height is lower than the diaphragm. During actual installation, the upper cover body with a convex annular block is used to fix the diaphragm and the voice coil, so that the dynamic sound diaphragm is fixed and stable, and the working stability of the dynamic sound diaphragm is maintained;

[0019] 2. The dynamic microphone core structure of the utility model is simple. The rear cavity shell is positioned and assembled on the microphone core base. The microphone is fixed through the wiring board to protect the microphone core. At the same time, it can keep the microphone core stable when working, the bass part is clear; the mid-range part is full and loud; the treble part is clear and delicate, without overall noise, the tone is restored, fidelity, and flexible. It is suitable for online live broadcasts, car microphone cores, Bluetooth speakers, karaoke rooms and entertainment singing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the explosion of the microphone core structure of the utility model;

[0022] Figure 2 It is a cross-sectional view of the microphone core structure of the utility model;

[0023] Figure 3 It is a partial structural schematic diagram of the microphone core structure of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the sound membrane of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the upper cover body of the utility model;

[0026] Figure 6 It is a cross-sectional view of the upper cover body of the utility model. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] A dynamic microphone core structure, the microphone core structure is arranged inside the microphone, such as Figure 1-6 As shown, the microphone core structure includes a rear cavity shell 1, a middle shell 2 is fixed on the rear cavity shell 1, a damping paper 3 is fixed in the middle shell 2, a ring-shaped tuning paper 4 is fixed in the middle shell 2, and the tuning paper 4 is located on the outside of the damping paper 3.

[0029] A magnetic circuit 5 is fixedly provided inside the middle shell body 2. The magnetic circuit 5 is at least 0.3 mm lower than that in the prior art. A sound diaphragm 6 is fixedly installed on the magnetic circuit 5. One end of the middle shell body 2 is fixedly connected to the rear cavity shell body 1, and an upper cover body 7 is fixedly installed on the other end. The upper cover body 7 fixes the sound diaphragm 6. A cover cotton 8 is fixedly installed on the upper cover body 7 to block foreign matter.

[0030] A microphone core base 9 is fixedly provided inside the microphone, and a rear cavity shell 1 is fixedly installed on the microphone core base 9. The microphone core base 9 is sleeved on the rear cavity shell 1 to fix the microphone core structure. A terminal block 10 is fixedly provided below the microphone core base 9, and a bolt 11 is installed on the terminal block 10. A threaded hole 12 is provided at one end of the rear cavity shell 1, and a mounting groove 13 is provided at the other end. The middle shell 2 is fixed in the mounting groove 13, and the bolt 11 passes through the terminal block 10 and is fixedly connected to the threaded hole 12.

[0031] The wiring board 10 is fixed on the rear cavity housing 1 , and the circuits connected on the rear cavity housing 1 are all fixedly connected to the wiring board 10 .

[0032] A fixing groove 21 is provided at one end of the middle shell 2 for mounting internal components of the microphone. An opening groove 22 is provided on the middle shell 2, in which a PCB board 23 is fixedly mounted. An annular groove 51 is provided at one end of the magnetic circuit 5. The sound membrane 6 includes a voice coil 62, on which a diaphragm 63 is fixedly mounted. A connecting ring 61 is fixedly mounted on one side of the voice coil 62, and the connecting ring 61 is fixedly mounted in the annular groove 51.

[0033] In this embodiment, the diaphragm 63 is a curved raised ring structure, the inner diameter of the voice coil 62 is 11.7-12.7 mm, and the edge height of the voice coil 62 is 0.1-0.3 mm lower than the height of the diaphragm 63. In this embodiment, the voice coil base on the diaphragm 63 is sunken by 0.3 mm, and a groove is provided in the voice coil 62, and the depth of the groove is 0.15-0.3 mm.

[0034] In this embodiment, the secondary outer diameter of the diaphragm 63 is not greater than 22 mm, and the thickness of the diaphragm 63 is 12-13 mm.

[0035] The upper cover body 7 includes a circular plate 71, on which a spherical top portion 72 is fixedly provided, and a ring plate 76 is fixedly provided on the side of the circular plate 71. The ring plate 76 is fixedly connected to the end of the middle shell body 2, and an array of tuning holes 75 are opened on the ring plate 76. The tuning holes 75 are located on the outside of the spherical top portion 72.

[0036] An arc groove 73 is provided on one side of the ball top 72, and the central protrusion of the diaphragm 63 is installed in the arc groove 73. An annular block 74 is provided on one side of the circular plate 71. The annular block 74 cooperates with the groove to fix the sound diaphragm 6 of the dynamic coil. The annular block 74 is located at the edge of the ball top 72 and is a sunken structure. The distance between the bottom of the annular block 74 and the circular plate 71 is at least 0.3 mm, that is, the ball top 72 of the upper cover body also needs to sink at least 0.3 mm.

[0037] Here’s how it works:

[0038] The edge of the voice coil 62 sinks lower than the diaphragm 63, and the connection between the diaphragm 63 and the magnetic circuit 5 sinks. In actual use, the dynamic microphone is fixed with the upper cover 7, the vibration and position offset of the voice coil 62 are small, and the voice coil 62 has a good sound reception effect. The bass part of the voice coil 62 is clear; the mid-range part is full and loud; the treble part is clear and delicate, without any noise as a whole, with restored tone, fidelity and flexibility. It is suitable for online live broadcast, car microphone core, Bluetooth speaker, karaoke room and entertainment singing.

[0039] During actual assembly, the planar protrusion of the upper cover 7 forms an annular block 74 to position and fix the voice coil 62, maintain the position of the voice coil 62, and cooperate with the structure of the voice coil 62 to form a high-quality microphone structure.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A dynamic microphone core structure, characterized in that: The microphone core structure comprises a rear cavity shell (1), a middle shell (2) is fixedly arranged on the rear cavity shell (1), and damping paper (3) and tuning paper (4) are fixedly arranged inside the middle shell (2); A magnetic circuit (5) is fixedly provided inside the middle shell (2), a sound membrane (6) is fixed on the magnetic circuit (5), the sound membrane (6) includes a voice coil (62), a diaphragm (63) is fixedly provided on the voice coil (62), one end of the middle shell (2) is fixedly connected to the rear cavity shell (1), and the other end is fixedly provided with an upper cover (7) for fixing the sound membrane (6), the upper cover (7) includes a circular plate (71), and a ring block (74) is provided on one side of the circular plate (71).

2. A dynamic microphone core structure according to claim 1, characterized in that: The tuning paper (4) is arranged in a ring shape in the middle shell (2), the tuning paper (4) is located outside the damping paper (3), and a cover cotton (8) is fixedly installed on the upper cover body (7).

3. A dynamic microphone core structure according to claim 1, characterized in that: A microphone core base (9) is fixedly provided on the outer side of the rear cavity housing (1) for fixing the dynamic microphone core structure, and a wiring board (10) is fixedly provided below the microphone core base (9), and bolts (11) are fixed on the wiring board (10).

4. A dynamic microphone core structure according to claim 3, characterized in that: One end of the rear cavity housing (1) is provided with a threaded hole (12), and the other end is provided with a mounting groove (13) for mounting the middle housing (2); a bolt (11) passes through the wiring board (10) and is connected to the threaded hole (12).

5. The dynamic microphone core structure according to claim 1, characterized in that: A fixing groove (21) is provided at one end of the middle shell (2), an opening groove (22) is provided on the middle shell (2), and a PCB board (23) is fixedly provided in the opening groove (22).

6. The dynamic microphone core structure according to claim 1, characterized in that: An annular groove (51) is provided at one end of the magnetic circuit (5), and a connecting ring (61) is fixedly provided on one side of the voice coil (62), wherein the connecting ring (61) is connected to the annular groove (51).

7. A dynamic microphone core structure according to claim 6, characterized in that: The diaphragm (63) is an annular arc surface structure, the edge height of the voice coil (62) is lower than the height of the diaphragm (63), and a groove is provided in the voice coil (62).

8. A dynamic microphone core structure according to claim 7, characterized in that: The secondary outer diameter of the diaphragm (63) is no greater than 22 mm, and the thickness of the diaphragm (63) is 12-13 mm.

9. The dynamic microphone core structure according to claim 7, characterized in that: A spherical top portion (72) is fixedly provided on the circular plate (71), an annular plate (76) is fixedly provided on the side of the circular plate (71), tuning holes (75) distributed in an array are provided on the circular plate (71), an arc groove (73) is provided on one side of the spherical top portion (72), and an annular block (74) cooperates with the groove.

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