Composite diaphragm of flat panel speaker and earphone speaker with same

Abstract

The invention relates to a composite diaphragm of a flat-panel loudspeaker and an earphone speaker with the diaphragm. The first surface of the diaphragm is provided with a first sub-coil formed by regular wiring of first conductors, and the second surface of the diaphragm is provided with a second sub-coil formed of regular wiring of second conductors; the first sub-coil and The second sub-coils are connected in series, the projections of the two sub-coils on the plane where the vibrating membrane is located are at least partially overlapped, and the current directions of the overlapping parts of the first sub-coil and the second sub-coil are the same. The earphone speaker includes the above-mentioned diaphragm and a permanent magnet opposite to the coil on the diaphragm. Its advantages are: a flat-panel speaker composite diaphragm coil with a composite structure is formed by connecting multiple coils in series, one coil is made of gold or platinum with good ductility, and the other coil is made of other conventional metal materials. The length and area of ​​the two coils control the overall quality of the coil, and then control the sound characteristics of the speaker, making the low and high frequency response and transient more balanced.

Description

technical field [0001] The invention relates to the technical field of loudspeakers, in particular to a composite diaphragm of a flat-panel loudspeaker and an earphone speaker with the diaphragm. Background technique [0002] Flat-panel earphones combine the advantages of both dynamic earphones and electrostatic earphones. Compared with electrostatic earphones, they have better performance in low frequency and are stronger than dynamic earphones in high frequency. The structure of the core transducer is usually a plurality of strip permanent magnets arranged side by side on the yoke, and a diaphragm is arranged parallel to the magnetic pole faces of these permanent magnets, and the position on the diaphragm opposite to the permanent magnet Coils are provided. The current flowing inside the coil is perpendicular to the magnetic field generated by the permanent magnet, so that by passing an alternating current in the coil, the coil generates a force that obeys Faraday's law. ...

AI Technical Summary

Problems solved by technology

[0005] First of all, the use of gold as the material of the diaphragm coil mainly uses its good ductility to achieve a very thin thickness, so it is very uneconomical to improve the quality by increasing the thickness of the gold coil

[0006] Secondly, in the research and development process of the earphones, the final tuning style always depends on the actual listening of the human ear, which means that to master the ideal thickness or ideal thickness range of the gold coil, it is necessary to produce a large number of diaphragms with different coil thicknesses. This not only puts forward very high requirements on the manufacturing process of gold coils, but also the research and development costs and research and development cycle are too long, which is difficult for enterprises to afford.

Therefore, it is also very difficult to control the sound characteristics by controlling the thickness of the coil

[0007] Not only that, the speaker of this flat-panel earphone works in a high-order vibration mode state, unlike the diaphragm of a traditional dynamic speaker that basically works in a piston vibration state, if and only when the diaphragm reaches the ideal of irrelevant vibration everywhere In the best state, the performance of the flat-panel loudspeaker can reach the best; in practical applications, the driver instigates the thin plate to perform bending resonance, which only meets the requirements of the theoretical assumption to a certain extent, and the result of bending resonance will cause the sound pressure frequency response curve to fluctuate greatly

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