CN114928794A - Movable coil microphone core and microphone that can tune - Google Patents

Abstract

The invention discloses a movable coil microphone core capable of tuning and a microphone, wherein the movable coil microphone core comprises a middle sleeve, a magnetic field assembly and a sound chamber, the middle sleeve is provided with a through cavity, and one end of the middle sleeve is provided with a sound film vibration cavity; the magnetic field assembly is arranged in the cavity and provided with a first sound cavity communicated with the sound film vibration cavity, and a first tuning layer is arranged between the first sound cavity and the sound film vibration cavity; the sound chamber is installed in the other end of well cover, and the sound chamber is equipped with the second sound chamber of intercommunication first sound chamber, is equipped with the second layer of tuning between second sound chamber and the first sound chamber. The movable coil microphone core has wide tone quality adjustable range and good adjustability, can be suitable for occasions with different tone quality requirements, and has good applicability.

Description

Movable coil miaow core and microphone that can tune

Technical Field

The invention relates to the technical field of microphones, in particular to a movable coil microphone core capable of tuning and a microphone.

Background

Microphones are widely used in daily life, work and entertainment activities, such as speech, meeting, singing, etc., and sound amplification can be realized by converting sound signals into electric signals through a microphone core and transmitting the electric signals to a loudspeaker connected with the microphone. A common microphone core is a moving-coil microphone core, which is a device for converting an audio signal into an electrical signal by using an electromagnetic induction phenomenon. In the correlation technique, the tuning structural design of moving coil miaow core is too simple, and adjustable range is narrow, and tone quality is single, causes sensitivity, pickup distance, tone quality effect etc. when using the microphone poor, is not suitable for the use.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the movable coil microphone core capable of tuning is wide in tone quality adjustable range, good in adjustability, capable of meeting the occasions with different tone quality requirements and good in applicability.

The invention also provides a microphone provided with the moving coil microphone core.

According to a first aspect of the present invention, a toneable moving coil core comprises: the middle sleeve is provided with a through cavity, and one end of the middle sleeve is provided with a sound film vibration cavity; the magnetic field assembly is arranged in the cavity and is provided with a first sound cavity communicated with the sound film vibration cavity, and a first tuning layer is arranged between the first sound cavity and the sound film vibration cavity; the sound chamber is installed at the other end of the middle sleeve and is provided with a second sound cavity communicated with the first sound cavity, and a second tuning layer is arranged between the second sound cavity and the first sound cavity.

The technical scheme at least has the following beneficial effects: through set up the first sound chamber that the intercommunication lies in the sound membrane vibration chamber of well cover one end in the magnetic field subassembly to the other end installation sound chamber of well cover sets up the second sound chamber that communicates first sound chamber, thereby form two back chamber structures, increase the stroke of sound wave air current, sound gets into the sound membrane of earlier process in the sound membrane vibration chamber after, then gets into first sound chamber and second sound chamber in proper order, the sound membrane receives the sound wave to strike and produces the vibration, and produce induced-current in magnetic field, realize the collection of sound. Simultaneously, set up first tuning layer between sound membrane vibration chamber and first sound chamber, set up second tuning layer between first sound chamber and second sound chamber, carry out the tuning to moving coil miaow core simultaneously through first tuning layer and second tuning layer, can tune out the moving coil miaow core of different tone qualities according to different first tuning layer and second tuning layer during the tuning, in order to be applicable to different occasions, thereby the adjustable scope of tone quality has been enlarged, the adjustability is good, and applicability and commonality have been improved.

According to some embodiments of the invention, the magnetic field assembly comprises an iron base, a sizing block and a partition plate, the iron base is provided with an accommodating cavity with an opening facing the sound film vibration cavity, the sizing block is installed in the accommodating cavity, a gap is formed between the outer peripheral wall of the sizing block and the inner wall of the accommodating cavity, the partition plate is installed at one end of the sizing block facing the sound film vibration cavity, the first sound cavity is formed between the partition plate and the bottom wall of the iron base, the partition plate is provided with a first sound hole communicating the sound film vibration cavity and the first sound cavity, and the bottom wall of the iron base is provided with a second sound hole communicating the first sound cavity and the second sound cavity.

According to some embodiments of the invention, the sizing block is provided with a first positioning portion, the partition plate is provided with a positioning hole, and the first positioning portion penetrates through the positioning hole.

According to some embodiments of the invention, a side of the partition plate facing away from the diaphragm vibration chamber is provided with a mounting groove, and the first tuning layer is accommodated in the mounting groove.

According to some embodiments of the invention, the outer periphery of the partition is provided with an annular plate extending in a thickness direction of the partition, the annular plate abutting against an inner wall of the accommodation chamber.

According to some embodiments of the invention, the magnetic field assembly further comprises a magnet, an iron core and an iron ring, the magnet and the iron core are sequentially installed on one side of the partition plate, which is far away from the sizing block, and the iron ring is installed at the opening of the iron seat and abuts against the partition plate.

According to some embodiments of the invention, a positioning groove is provided on a side of the diaphragm facing the diaphragm vibration chamber, and the magnet is partially received in the positioning groove.

According to some embodiments of the invention, the middle sleeve is provided with a second positioning portion located in the cavity, the magnetic field assembly abuts against one side of the second positioning portion, the magnetic field assembly is connected with a tuning board through a fastener, the tuning board is provided with a third sound hole, the tuning board abuts against the other side of the second positioning portion, and the second tuning layer is sandwiched between the magnetic field assembly and the tuning board.

According to some embodiments of the invention, the second tuning layer comprises damping cotton and damping paper, the damping cotton and the damping paper being sequentially stacked between the magnetic field assembly and the tuning plate.

A microphone according to an embodiment of the second aspect of the present invention includes: the tuning moving coil microphone core according to the first embodiment.

The technical scheme at least has the following beneficial effects: the microphone is because the above-mentioned moving coil miaow core of installation, wherein, the moving coil miaow core is through setting up the first sound chamber that the intercommunication lies in the sound membrane vibration chamber of well cover one end in the magnetic field subassembly, and the other end installation sound room of well cover sets up the second sound chamber that communicates first sound chamber, thereby form two back cavity structures, increase the stroke of sound wave air current, sound gets into the sound membrane of earlier in the sound membrane vibration chamber after the back, then gets into first sound chamber and second sound chamber in proper order, the sound membrane receives the sound wave to assault and produces the vibration, and produce induced-current in magnetic field, realize the collection of sound. Simultaneously, set up first tuning layer between sound membrane vibration chamber and first sound chamber, set up second tuning layer between first sound chamber and second sound chamber, carry out the tuning to moving coil miaow core simultaneously through first tuning layer and second tuning layer, can tune out the moving coil miaow core of different tone qualities according to different first tuning layer and second tuning layer during the tuning, in order to be applicable to different occasions, thereby the adjustable scope of tone quality has been enlarged, the adjustability is good, and applicability and commonality have been improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a moving-coil microphone core according to an embodiment of the present invention;

FIG. 2 is a sectional view of a core of a moving coil microphone according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a middle sleeve in an embodiment of the present invention;

FIG. 4 is a schematic top view of a spacer according to an embodiment of the present invention;

FIG. 5 is a schematic bottom structure view of a partition plate according to an embodiment of the present invention;

FIG. 6 is a front cross-sectional view of a separator plate in an embodiment of the invention.

Reference numerals:

a middle sleeve 100; a chamber 110; a diaphragm vibration chamber 120; a second positioning portion 130; a sound transmission hole 140; a filter cotton 150;

a magnetic field assembly 200; an iron seat 210; a bottom wall 211; a second acoustic port 212; a sizing block 220; a first positioning portion 221; a partition 230; a first acoustic port 231; positioning holes 232; a mounting groove 233; an annular plate 234; a positioning groove 235; a magnet 240; a core 250; an iron ring 260; a first acoustic chamber 270; a first tuning layer 280; a tone plate 290; a third tone hole 291; a fastener 292;

a sound chamber 300; a second sound chamber 310; a second tuning layer 320; damping cotton 321; a damping paper 322;

the shock absorbing base 400.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings only for the convenience of description of the present invention and simplification of the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise specifically limited, terms such as set, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention by combining the specific contents of the technical solutions.

Referring to fig. 1 to 6, a first embodiment of the present invention provides a toneable moving coil core applied to a microphone, wherein the moving coil core includes a middle sleeve 100, a magnetic field assembly 200 and a sound chamber 300.

Referring to fig. 1 to 3, it can be understood that the middle sleeve 100 is configured as a rotary structure, specifically, the middle sleeve 100 is configured as a sleeve structure, a central line direction of the middle sleeve 100 is an axial direction of the middle sleeve 100, the middle sleeve 100 is provided with a cavity 110 penetrating along the axial direction, an upper end of the cavity 110 is provided with a sound film vibration cavity 120, and a sound film is arranged in the sound film vibration cavity 120 and can vibrate when being impacted by sound waves. Generally speaking, the peripheral wall of the middle sleeve 100 is provided with a plurality of sound transmission holes 140, and the sound transmission holes 140 are communicated with the sound film vibration cavity 120 to pick up sound. And, the outer wall of the middle cover 100 is provided with a tuning paper covering the sound transmitting holes 140 so as to adjust the sound collecting effect.

Referring to fig. 2, it can be understood that the magnetic field assembly 200 is installed in the cavity 110 and located below the sound diaphragm vibration cavity 120, generally speaking, the sound diaphragm is connected with a coil extending into the magnetic field assembly 200, and the coil can be driven to move in the up-and-down direction when the sound diaphragm vibrates, so that the coil cuts the magnetic induction lines, and then generates a current, and converts the sound waves into the current, thereby realizing sound collection. Specifically, the magnetic field assembly 200 includes an iron base 210, a sizing block 220 and a partition plate 230, the iron base 210 is provided with an accommodating cavity with an upward opening, that is, the opening of the accommodating cavity faces the sound film vibration cavity 120, the longitudinal section of the iron base 210 is U-shaped, the sizing block 220 is installed in the accommodating cavity, a gap is formed between the outer circumferential wall of the sizing block 220 and the inner wall of the accommodating cavity, the partition plate 230 is installed at the upper end of the sizing block 220, the circumferential wall of the partition plate 230 is attached to the inner wall of the accommodating cavity, so that a first sound cavity 270 is formed between the partition plate 230 and the bottom wall 211 of the iron base 210, the partition plate 230 is provided with a plurality of first sound holes 231, the plurality of first sound holes 231 are arranged at equal intervals along the circumferential direction of the partition plate 230, the first sound holes 231 communicate with the sound film vibration cavity 120 and the first sound cavity 270, a first tuning layer 280 is arranged between the first sound cavity 270 and the sound film vibration cavity 120, the first tuning layer 280 may be damping paper, damping cotton or a combination of the two, and by replacing the first tuning layer 280, different tone qualities can be called out.

Referring to fig. 1 and 2, it can be understood that the sound chamber 300 is installed at the lower end of the middle sleeve 100, the sound chamber 300 has a second sound cavity 310 with an upward opening, the second sound cavity 310 is located below the magnetic field assembly 200, the bottom wall 211 of the iron base 210 is provided with a plurality of second sound holes 212, the plurality of second sound holes 212 are arranged at equal intervals along the circumferential direction of the iron base 210, so that the second sound cavity 310 is communicated with the first sound cavity 270, a second tuning layer 320 is arranged between the first sound cavity 270 and the second sound cavity 310, the second tuning layer 320 can be damping paper 322, damping cotton 321 or a combination of the two, and different sound qualities can be tuned by replacing the second tuning layer 320.

Through set up the first sound chamber 270 of the sound membrane vibration chamber 120 of intercommunication upper end in magnetic field assembly 200 to at the lower extreme installation sound chamber 300 of well cover 100 and set up the second sound chamber 310 of the first sound chamber 270 of intercommunication, thereby form two back chamber structures, increase the stroke of sound wave air current, sound gets into the sound membrane in the sound membrane vibration chamber 120 earlier after the back, then gets into first sound chamber 270 and second sound chamber 310 in proper order, the sound membrane receives the sound wave to strike and produces the vibration, and produce induced current in the magnetic field, realize the collection of sound. Meanwhile, the first tuning layer 280 is arranged between the sound film vibration cavity 120 and the first sound cavity 270, the second tuning layer 320 is arranged between the first sound cavity 270 and the second sound cavity 310, the moving coil microphone core is tuned through the first tuning layer 280 and the second tuning layer 320, and the moving coil microphone core with different tone qualities can be tuned according to different first tuning layer 280 and second tuning layer 320 during tuning, so that the tuning range of the tone qualities is expanded, the adjustability is good, and the applicability and the universality are improved.

Referring to fig. 2 and 4, it can be understood that a first positioning portion 221 is convexly disposed at an upper end of the sizing block 220, the first positioning portion 221 is configured as a columnar structure, a positioning hole 232 is disposed at a middle portion of the partition plate 230, a center line of the positioning hole 232 coincides with a center line of the sizing block 220, and the first positioning portion 221 is disposed through the positioning hole 232, so that the partition plate 230 is positioned, and the installation is convenient. Generally, the upper end surface of the back iron 220 is flush with the upper side surface of the spacer 230. Of course, the first positioning portion 221 and the positioning hole 232 of the partition 230 may be in an interference fit, and the connection is stable.

Referring to fig. 2 and 5, it can be understood that the lower side of the partition plate 230 is provided with a mounting groove 233, the mounting groove 233 is in an annular structure, that is, the mounting groove 233 is located on a side of the partition plate 230 away from the sound film vibration cavity 120, the first tuning layer 280 is also in an annular structure, and the first tuning layer 280 is accommodated in the mounting groove 233, so that a mounting space is provided for the first tuning layer 280, and the first tuning layer 280 can be fixed on the partition plate 230 in a glue adhesion manner, so that the connection is stable. Of course, the mounting groove 233 may be provided at the upper side of the partition 230, and in this case, the first tuning layer 280 is mounted at the upper side of the partition 230. The installation position of the mounting groove 233 is not specifically limited, and it is only necessary that the first tuning layer 280 is accommodated in the mounting groove 233, and then the first tuning layer 280 is located between the diaphragm vibration cavity 120 and the first sound cavity 270.

Referring to fig. 2 and 4, it can be understood that the annular plate 234 is disposed on the outer periphery of the partition plate 230, the upper end and the lower end of the annular plate 234 extend along the thickness direction of the partition plate 230, and after the partition plate 230 is mounted on the sizing block 220, the annular plate 234 abuts against the inner wall of the accommodating cavity, so that the partition plate 230 can be mounted more stably, noise generated by the swinging of the combination of the partition plate 230 and the sizing block 220 is avoided, and the sound quality of the moving-coil microphone core is improved.

Referring to fig. 2, it can be understood that the magnetic field assembly 200 further includes a magnet 240, an iron core 250 and an iron ring 260, the magnet 240 is fixedly mounted above the sizing block 220 and abuts against the upper side surface of the spacer 230, so that the spacer 230 is axially fixed relative to the sizing block 220 and the connection is stable; the iron core 250 is fixedly mounted above the magnet 240, the iron ring 260 is fixedly mounted at the upper end of the iron seat 210, and the lower end surface of the iron ring 260 abuts against the annular plate 234 of the partition plate 230, so that the partition plate 230 is axially positioned, and the partition plate 230 is more stably and reliably mounted. Generally, there is a gap between the inner wall of the iron ring 260 and the magnet 240 and the iron core 250, so that the diaphragm vibration cavity 120 is communicated with the first sound cavity 270, and the coil connected to the diaphragm extends into the magnetic field assembly 200. In addition, the upper end surface of the iron ring 260 is flush with the upper end surface of the iron core 250 to provide a sufficient vibration space for the sound diaphragm.

Referring to fig. 2 and 4, it can be understood that the upper side of the partition 230 is provided with a positioning groove 235, that is, the positioning groove 235 is located on one side of the partition 230 facing the diaphragm vibration chamber 120, the positioning groove 235 is configured in a concave structure, and the lower end of the magnet 240 is accommodated in the positioning groove 235, so that the magnet 240 is positioned, and the magnet 240 is conveniently installed.

Referring to fig. 2 and 3, it can be understood that the middle sleeve 100 is provided with a second positioning part 130, the second positioning part 130 is located in the cavity 110, the second positioning part 130 protrudes toward the center line of the middle sleeve 100, meanwhile, the second positioning part 130 does not block the cavity 110, and the cavity 110 is divided into two mounting cavities by the second positioning part 130, wherein the mounting cavity at the upper end is larger, and the mounting cavity at the lower end is smaller. The second positioning portion 130 may be a convex ring or a plurality of protrusions spaced along the circumferential direction of the middle sleeve 100, and the second positioning portion 130 and the middle sleeve 100 are an integrally formed structure, for example, an integrally formed plastic part, which can be directly produced by an injection molding process, and is convenient to process.

Referring to fig. 2, it can be understood that magnetic field assembly 200 is mounted to the mounting chamber on the upper side of second positioning portion 130, and magnetic field assembly 200 abuts against the upper end surface of second positioning portion 130, specifically, the lower end surface of iron base 210 abuts against the upper end surface of second positioning portion 130, and iron base 210 is connected with sound adjusting plate 290 by fastener 292, and sound adjusting plate 290 is mounted to the mounting chamber on the lower side of second positioning portion 130, and sound adjusting plate 290 is provided with a circular plate structure, and the center line of sound adjusting plate 290 coincides with the center line of middle sleeve 100, and sound adjusting plate 290 abuts against the lower end surface of second positioning portion 130, and fastener 292 is provided as a screw, and bottom wall 211 of iron base 210 is provided with a screw hole for fitting the screw, and in general, sound adjusting plate 290 is provided with a through hole for the rod portion of the screw to pass through. Therefore, the fastening member 292 can penetrate through the through hole of the tuning board 290 and then be in threaded connection with the screw hole of the iron base 210, so that the iron base 210 and the tuning board 290 are respectively abutted against two sides of the second positioning portion 130, and under the interaction of the fastening member 292 and the second positioning portion 130, the magnetic field assembly 200 and the tuning board 290 are fastened and connected to the middle sleeve 100, the connection is stable and reliable, and the magnetic field assembly 200 is prevented from loosening.

Referring to fig. 2, it is understood that the tuning plate 290 is provided with a plurality of third tone holes 291, and the plurality of third tone holes 291 are arranged at equal intervals in the circumferential direction of the tuning plate 290 so as to communicate the first tone chamber 300 with the second tone chamber 300. Second tuning layer 320 presss from both sides and locates between the diapire 211 of tuning board 290 and iron stand 210, sticiss second tuning layer 320 through iron stand 210 and tuning board 290, can make second tuning layer 320 connect more firmly, avoids second tuning layer 320 not hard up, makes the production that the moving coil miaow core can normally pick up the sound and noise abatement. Meanwhile, the second tuning layer 320 is fixed by the fastening piece 292 and the iron base 210 in a threaded connection mode, so that the second tuning layer 320 can be conveniently detached, different tone qualities can be obtained by replacing the second tuning layers 320 with different densities, and tuning is achieved.

Referring to fig. 2, it can be understood that the second tuning layer 320 includes damping cotton 321 and damping paper 322, and specifically, includes two damping cotton 321 and one damping paper 322, which are sequentially stacked between the iron base 210 and the tuning board 290 along the axial direction of the middle sleeve 100, wherein the two damping cotton 321 are located at the lower side of the damping paper 322, the damping paper 322 abuts against the iron base 210, and the lowest damping cotton 321 abuts against the tuning board 290. Because the damping cotton 321 has a certain deformation amount, the damping cotton 321 and the damping paper 322 are arranged, so that the whole second tuning layer 320 can be compressed and deformed, the second tuning layer 320 is tightly close to the iron base 210 and the tuning board 290, the installation is stable and reliable, and the second tuning layer 320 is prevented from loosening.

Referring to fig. 1 and 2, it can be understood that, in order to avoid damage to the magnetic field assembly 200, the filter cotton 150 is detachably mounted on the side of the diaphragm vibration chamber 120 facing away from the magnetic field assembly 200. When the moving coil miaow core pickup, the foreign matter in the filter pulp 150 can the filtered air, avoids the foreign matter to get into in the moving coil miaow core and leads to magnetic field assembly 200 trouble, improves the reliability of moving coil miaow core.

Referring to fig. 1 and 2, it can be understood that a shock absorbing base 400 is further disposed on the outer side of the sound chamber 300, and the shock absorbing base 400 is a rubber base, so that the moving coil microphone core can be effectively buffered when being collided, the diaphragm of the moving coil microphone core is prevented from vibrating when being collided, and noise is prevented from being generated.

The embodiment of the second aspect of the present invention provides a microphone, which uses the above-mentioned moving coil core, and the microphone is just because the above-mentioned moving coil core is used, in the moving coil core, the first sound cavity 270 communicated with the sound film vibration cavity 120 at the upper end is arranged in the magnetic field assembly 200, and the sound chamber 300 is installed at the lower end of the middle sleeve 100 and the second sound cavity 310 communicated with the first sound cavity 270 is arranged, so as to form a double back cavity structure, increase the stroke of sound wave airflow, sound enters first through the sound film in the sound film vibration cavity 120, then enters the first sound cavity 270 and the second sound cavity 310 in sequence, the sound film is impacted by sound waves to generate vibration, and induced current is generated in the magnetic field, so as to realize sound collection. Meanwhile, the first tuning layer 280 is arranged between the sound film vibration cavity 120 and the first sound cavity 270, the second tuning layer 320 is arranged between the first sound cavity 270 and the second sound cavity 310, the moving coil microphone core is tuned through the first tuning layer 280 and the second tuning layer 320, and the moving coil microphone core with different tone qualities can be tuned according to different first tuning layer 280 and second tuning layer 320 during tuning, so that the tuning range of the tone qualities is expanded, the adjustability is good, and the applicability and the universality are improved.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A movable coil miaow core that can toned, characterized in that includes:

the middle sleeve is provided with a through cavity, and one end of the middle sleeve is provided with a sound film vibration cavity;

the magnetic field assembly is arranged in the cavity and is provided with a first sound cavity communicated with the sound film vibration cavity, and a first tuning layer is arranged between the first sound cavity and the sound film vibration cavity;

the sound chamber is installed at the other end of the middle sleeve and is provided with a second sound cavity communicated with the first sound cavity, and a second tuning layer is arranged between the second sound cavity and the first sound cavity.

2. The toneable moving coil microphone core according to claim 1, wherein: the magnetic field component comprises an iron seat, a sizing block and a partition plate, wherein the iron seat is provided with an accommodating cavity with an opening facing the sound film vibration cavity, the sizing block is installed in the accommodating cavity, a gap is formed between the outer peripheral wall of the sizing block and the inner wall of the accommodating cavity, the partition plate is installed at one end of the sound film vibration cavity facing the sizing block, the partition plate and the bottom wall of the iron seat form the first sound cavity, the partition plate is provided with a first sound hole communicated with the sound film vibration cavity and the first sound hole, and the bottom wall of the iron seat is provided with a second sound hole communicated with the first sound cavity and the second sound cavity.

3. The toneable moving coil microphone core according to claim 2, wherein: the sizing block is provided with a first positioning portion, the partition plate is provided with a positioning hole, and the first positioning portion penetrates through the positioning hole.

4. The toneable moving coil microphone core according to claim 2, wherein: the baffle deviates from one side in sound membrane vibration chamber is equipped with the mounting groove, first tuning layer hold in the mounting groove.

5. The toneable moving coil microphone core according to claim 2, wherein: the periphery of baffle is equipped with the annular plate, the annular plate is followed the thickness direction of baffle extends, the annular plate butt in the inner wall of holding the chamber.

6. The toneable moving coil microphone core according to claim 2 or 5, wherein: the magnetic field component further comprises a magnet, an iron core and an iron ring, the magnet and the iron core are sequentially installed on one side, deviating from the sizing block, of the partition plate, and the iron ring is installed at the opening of the iron base and abuts against the partition plate.

7. The toneable moving coil microphone core according to claim 6, wherein: one side of the partition board facing the sound film vibration cavity is provided with a positioning groove, and the magnet part is accommodated in the positioning groove.

8. The toneable moving coil microphone core according to claim 1, wherein: the middle sleeve is provided with a second positioning portion located in the cavity, the magnetic field assembly abuts against one side of the second positioning portion, the magnetic field assembly is connected with a tone adjusting plate through a fastener, the tone adjusting plate is provided with a third sound hole, the tone adjusting plate abuts against the other side of the second positioning portion, and the second tone adjusting layer is clamped between the magnetic field assembly and the tone adjusting plate.

9. The toneable moving coil microphone core according to claim 8, wherein: the second tuning layer comprises damping cotton and damping paper, and the damping cotton and the damping paper are sequentially stacked between the magnetic field assembly and the tuning boards.

10. A microphone, characterized by: a toneable moving coil core comprising any one of claims 1 to 9.

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