CN220123047U - Magnetic circuit assembly for planar magnetic earphone, planar magnetic transducer and planar magnetic earphone - Google Patents
Magnetic circuit assembly for planar magnetic earphone, planar magnetic transducer and planar magnetic earphone Download PDFInfo
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- CN220123047U CN220123047U CN202320939402.2U CN202320939402U CN220123047U CN 220123047 U CN220123047 U CN 220123047U CN 202320939402 U CN202320939402 U CN 202320939402U CN 220123047 U CN220123047 U CN 220123047U
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- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000000712 assembly Effects 0.000 abstract description 5
- 238000000429 assembly Methods 0.000 abstract description 5
- 230000006698 induction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 230000026683 transduction Effects 0.000 description 1
- 238000010361 transduction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a magnetic circuit assembly for a planar magnetic earphone, a planar magnetic transducer and the planar magnetic earphone, wherein the planar magnetic earphone comprises an earphone shell, the planar magnetic transducer and a waveguide structure, the planar magnetic transducer is arranged in the shell, and the planar magnetic transducer comprises a vibrating diaphragm and magnetic circuit assemblies coaxially arranged on two sides of the vibrating diaphragm; a printed circuit is etched on the vibrating diaphragm; the magnetic circuit assembly is internally provided with a bar magnet which is in a grid shape; the waveguide structure comprises a plurality of semi-cylindrical pieces, and one side of a rectangular plane of each semi-cylindrical piece is consistent with one side of the bar-shaped magnet close to the human ear and is connected or abutted in a one-to-one correspondence mode. By additionally arranging the waveguide structure, the utility model can effectively reduce the negative influence of the grid-shaped magnetic circuit on the sound wave, particularly the influence on the directivity of the sound wave, reduce the diffraction of the sound wave and the interference generated by the diffraction, and finally improve the tone quality performance of the earphone.
Description
Technical Field
The present utility model relates to the field of planar magnetic earphone technologies, and in particular, to a magnetic circuit assembly for a planar magnetic earphone, a planar magnetic transducer, and a planar magnetic earphone.
Background
The planar magnetic transducer generally comprises a vibrating diaphragm and magnetic circuit components positioned at two sides of the vibrating diaphragm, wherein a printed circuit is arranged in the vibrating diaphragm, and magnetic induction wires parallel to the surface of the vibrating diaphragm are formed between the magnetic circuit components at two sides. During operation, analog audio signals are led to the vibrating diaphragm through the printed circuit, the vibrating diaphragm is perpendicular to the printed circuit, and the earphone transduction principle that the vibrating diaphragm vibrates is driven by utilizing the ampere force generated by signal current through the printed circuit in a magnetic field. Compared with the traditional moving-coil earphone, the whole vibrating diaphragm of the planar magnetic earphone is driven by ampere force more uniformly, the vibration of the vibrating diaphragm is generated in a cutting mode, the whole vibrating diaphragm can have better high-frequency response capability, and the nonlinear distortion is lower.
The whole vibrating diaphragm of the planar magnetic earphone can have better high-frequency response capability, and in order to generate a magnetic field that magnetic induction lines are parallel to the vibrating diaphragm, magnets in the magnetic circuit assembly are arranged in a grid shape, and the magnets are usually strip magnets. When the sound wave generated by vibration of the diaphragm passes through the grid-shaped magnet, the directivity of the sound wave is affected due to diffraction and interference of the sound wave, and finally the tone quality performance of the earphone is affected.
Disclosure of Invention
Aiming at the problems, the utility model provides a magnetic circuit assembly for a planar magnetic earphone, a planar magnetic transducer and the planar magnetic earphone, and the negative influence of a grid-shaped magnetic circuit on sound waves, particularly the influence on directivity of the magnetic circuit can be effectively reduced by additionally arranging a waveguide structure, so that sound diffraction and interference generated by the magnetic circuit are reduced, and finally the tone quality performance of the earphone is improved.
The technical scheme of the utility model is as follows:
in a first aspect, the utility model provides a planar magnetic earphone, which comprises an earphone shell, a planar magnetic transducer and a waveguide structure, wherein the planar magnetic transducer is arranged in the shell and comprises a vibrating diaphragm and magnetic circuit components coaxially arranged on two sides of the vibrating diaphragm; a printed circuit is etched on the vibrating diaphragm; the magnetic circuit assembly is internally provided with a bar magnet which is in a grid shape; the waveguide structure comprises a plurality of semi-cylindrical pieces, and one side of a rectangular plane of each semi-cylindrical piece is consistent with one side of the bar-shaped magnet close to the human ear and is connected or abutted in a one-to-one correspondence mode.
In a further aspect, the waveguide structure is connected to the housing.
In a further aspect, the waveguide structure is integrally formed with the housing.
In a further aspect, the waveguide structure is connected to the planar magnetic transducer.
In a further technical scheme, the semi-cylindrical part is an aluminum alloy part.
In a second aspect, the present utility model provides a planar magnetic transducer, including a diaphragm, a waveguide structure, and magnetic circuit assemblies coaxially mounted on both sides of the diaphragm; a printed circuit is etched on the vibrating diaphragm; the magnetic circuit assembly is internally provided with a bar magnet which is in a grid shape; the waveguide structure comprises a plurality of semi-cylindrical pieces, and one side of a rectangular plane of each semi-cylindrical piece is consistent with one side of the bar-shaped magnet close to the human ear and is in butt joint or connection in a one-to-one correspondence.
In a further technical scheme, the planar magnetic transducer further comprises a waveguide sheet, the waveguide structure is mounted on the waveguide sheet, and the waveguide sheet is coaxially mounted between the magnetic circuit assembly and the vibrating diaphragm.
In a third aspect, the present utility model provides a magnetic circuit assembly for a planar magnetic earphone, comprising a mounting plate, a bar magnet and a waveguide structure; the surface of the mounting piece is provided with a through accommodating groove; the plurality of bar magnets are arranged in the accommodating groove in a grid shape, and the polarities of the adjacent bar magnets are opposite; the waveguide structure comprises a plurality of semi-cylindrical pieces, and one side of a rectangular plane of each semi-cylindrical piece is consistent with and in one-to-one correspondence with the outer side face of the bar magnet.
In a further technical scheme, the accommodating groove is square or round.
The beneficial effects of the utility model are as follows:
according to the utility model, the waveguide structure is additionally arranged in the earphone, and the waveguide structure is additionally arranged on one side of the strip-shaped magnet close to the human ear, so that the negative influence of the grid-shaped magnetic circuit on sound waves, especially the influence on the directivity of the grid-shaped magnetic circuit, the sound wave diffraction and the interference generated by the sound wave diffraction are reduced, and finally the tone quality performance of the earphone is improved.
Drawings
FIG. 1 is a schematic diagram of a planar magnetic earphone according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a magnetic circuit assembly for a planar magnetic earphone according to an embodiment of the present utility model;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a plot of the line of magnetic induction between two magnetic circuit assemblies according to an embodiment of the present utility model.
Reference numerals illustrate:
10-magnetic circuit assembly; 11-mounting a sheet; 111-a receiving groove; 12-bar magnets; 13-semi-cylindrical members; 20-vibrating diaphragm; 30-diaphragm ring.
Detailed Description
Embodiments of the present utility model are further described below with reference to the accompanying drawings.
Examples
As shown in fig. 1, in a first aspect, the present utility model provides a planar magnetic earphone, which includes an earphone housing (in fig. 1, the planar magnetic transducer is integrally disposed with the planar magnetic transducer, the outer periphery of the planar magnetic transducer is the earphone housing), a planar magnetic transducer and a waveguide structure, wherein the planar magnetic transducer is disposed in the housing, and the planar magnetic transducer includes a diaphragm 20 and magnetic circuit assemblies 10 coaxially mounted on two sides of the diaphragm 20. Printed circuitry is etched on the diaphragm 20; the magnetic circuit assembly 10 is provided with a bar magnet 12 having a grid shape. The waveguide structure comprises a plurality of semi-cylindrical pieces 13, wherein one side of a rectangular plane of each semi-cylindrical piece 13 is consistent with one side of the bar magnet 12 close to the human ear, and the semi-cylindrical pieces are connected or abutted in a one-to-one correspondence. For example, the rectangular plane of the semi-cylindrical member 13 is connected with the side surface of the bar magnet 12 in a one-to-one correspondence manner, and may be fixedly connected by bonding or the like. For example, abutting may refer to the rectangular plane being in contact with one side of the bar magnet 12. Here, the waveguide structure may be abutted against the bar magnet 12 as a separate component, may be mounted or integrally provided on the earphone housing, and may be mounted on the magnetic circuit assembly as long as it can be connected or abutted against the bar magnet 12, and the present utility model is not limited thereto.
According to the utility model, the waveguide structure is additionally arranged in the earphone, and the waveguide structure is additionally arranged on one side of the strip-shaped magnet 12 close to the human ear, so that the negative influence of the grid-shaped magnetic circuit on sound waves, especially the influence on the directivity of the grid-shaped magnetic circuit, the diffraction of the sound waves and the interference generated by the diffraction of the sound waves can be effectively reduced, and the tone quality performance of the earphone is finally improved.
In a further embodiment, the waveguide structure is connected to the housing.
In further embodiments, the waveguide structure is integrally formed with the housing. The device is simple and convenient to manufacture, and meanwhile, the assembly process is simplified.
In a further embodiment, the waveguide structure is connected with the planar magnetic transducer.
In a further embodiment, the semi-cylindrical member 13 is an aluminum alloy member.
As shown in fig. 1, in a second aspect, the present utility model provides a planar magnetic transducer, which includes a diaphragm 20, a waveguide structure, and magnetic circuit assemblies 10 coaxially installed at both sides of the diaphragm 20; printed circuitry is etched on the diaphragm 20; the magnetic circuit assembly 10 is provided with a bar magnet 12 in a grid shape; the waveguide structure comprises a plurality of semi-cylindrical pieces 13, wherein one side of a rectangular plane of each semi-cylindrical piece 13 is consistent with one side of the bar magnet 12 close to the human ear, and is in butt joint or connection in a one-to-one correspondence. For example, a diaphragm ring 30 may be further disposed between the magnetic circuit assembly 10 and the diaphragm 20, and a PCB circuit board (not shown in the figure, which is a prior art) may be disposed on the diaphragm ring 30, where an output end of the PCB circuit board is electrically connected to a printed circuit on the diaphragm 20 (e.g. contact type electrical connection), and an input end of the PCB circuit board is connected to an audio input interface (e.g. by welding a 3.5 audio socket via a pad, so as to be connected to a detachable earphone cord).
In further embodiments, the planar-magnetic transducer further comprises a waveguide plate on which the waveguide structure is mounted, the waveguide plate being coaxially mounted between the magnetic circuit assembly 10 and the diaphragm 20. Here, that is to say, the waveguide structure is parallel to the bar magnet 12 and on the side facing away from the diaphragm 20. The waveguide sheet with the waveguide structure is used as an independent part for installation, the structure of the original component is not changed, and the cost is low.
As shown in fig. 2 and 3, in a third aspect, the present utility model provides a magnetic circuit assembly for a planar magnetic earphone, comprising a mounting plate 11, a bar magnet 12 and a waveguide structure; the surface of the mounting plate 11 is provided with a through accommodating groove 111; a plurality of the bar magnets 12 are installed in the receiving groove 111 in a grid shape, and polarities between the adjacent bar magnets 12 are opposite (as shown in fig. 4); the waveguide structure comprises a plurality of semi-cylindrical pieces 13, and one side of a rectangular plane of each semi-cylindrical piece 13 is consistent with and connected with the outer side face of each bar magnet 12 in a one-to-one correspondence manner. So set up, need not to carry out the alignment of bar magnet 12 with semicylinder 13, the assembly degree of difficulty is lower.
In other embodiments, the receiving groove 111 is square or circular.
The foregoing examples merely illustrate specific embodiments of the utility model, which are described in greater detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.
Claims (9)
1. The planar magnetic earphone is characterized by comprising an earphone shell, a planar magnetic transducer and a waveguide structure, wherein the planar magnetic transducer is arranged in the shell and comprises a vibrating diaphragm and magnetic circuit components coaxially arranged on two sides of the vibrating diaphragm; a printed circuit is etched on the vibrating diaphragm; the magnetic circuit assembly is internally provided with a bar magnet which is in a grid shape; the waveguide structure comprises a plurality of semi-cylindrical pieces, and one side of a rectangular plane of each semi-cylindrical piece is consistent with one side of the bar-shaped magnet close to the human ear and is connected or abutted in a one-to-one correspondence mode.
2. The planar magnetic earphone of claim 1 wherein the waveguide is coupled to the housing.
3. The planar magnetic earphone of claim 2 wherein the waveguide is integrally formed with the housing.
4. The planar magnetic earphone of claim 1 wherein the waveguide is connected to the planar magnetic transducer.
5. The planar magnetic earphone of any of claims 1-4 wherein the semi-cylindrical member is an aluminum alloy member.
6. The planar magnetic transducer is characterized by comprising a vibrating diaphragm, a waveguide structure and magnetic circuit components coaxially arranged at two sides of the vibrating diaphragm; a printed circuit is etched on the vibrating diaphragm; the magnetic circuit assembly is internally provided with a bar magnet which is in a grid shape; the waveguide structure comprises a plurality of semi-cylindrical pieces, and one side of a rectangular plane of each semi-cylindrical piece is consistent with one side of the bar-shaped magnet close to the human ear and is in butt joint or connection in a one-to-one correspondence.
7. The planar-magnetic transducer of claim 6 further comprising a waveguide mounted to the waveguide coaxially between the magnetic circuit assembly and the diaphragm.
8. A magnetic circuit assembly for a planar magnetic earphone is characterized by comprising a mounting plate, a strip-shaped magnet and a waveguide structure; the surface of the mounting piece is provided with a through accommodating groove; the plurality of bar magnets are arranged in the accommodating groove in a grid shape, and the polarities of the adjacent bar magnets are opposite; the waveguide structure comprises a plurality of semi-cylindrical pieces, and one side of a rectangular plane of each semi-cylindrical piece is consistent with and in one-to-one correspondence with the outer side face of the bar magnet.
9. The magnetic circuit assembly for a planar magnetic earphone of claim 8 wherein the receiving slot is square or circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320939402.2U CN220123047U (en) | 2023-04-24 | 2023-04-24 | Magnetic circuit assembly for planar magnetic earphone, planar magnetic transducer and planar magnetic earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320939402.2U CN220123047U (en) | 2023-04-24 | 2023-04-24 | Magnetic circuit assembly for planar magnetic earphone, planar magnetic transducer and planar magnetic earphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220123047U true CN220123047U (en) | 2023-12-01 |
Family
ID=88915946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320939402.2U Active CN220123047U (en) | 2023-04-24 | 2023-04-24 | Magnetic circuit assembly for planar magnetic earphone, planar magnetic transducer and planar magnetic earphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220123047U (en) |
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2023
- 2023-04-24 CN CN202320939402.2U patent/CN220123047U/en active Active
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