A composite diaphragm type flat-panel earphone

Abstract

The invention relates to a composite vibrating diaphragm type flat headset which is provided with a headband, earflaps arranged at the two ends of the headband, flat plate type transducers arranged in the earflaps, and a headset cable used for providing electric signals for the transducers. Each flat plate type transducer comprises a vibrating diaphragm the periphery of which is fixed on a frame, and a permanent magnet arranged opposite to a voice coil on the vibrating diaphragm, wherein a first subcoil is arranged on the first surface of the vibrating diaphragm, a second subcoil is arranged on the second surface of the vibrating diaphragm, the first subcoil is connected with the second subcoil in series to form the voice coil, the projection of the first subcoil on the plane where the vibrating diaphragm is located and the projection of the second subcoil on the plane where the vibrating diaphragm is located coincide partially at least, and the current directions of the coinciding parts of the first subcoil and the second subcoil are identical. The composite vibrating diaphragm type flat headset has the advantages that multiple coils are connected in series to form the vibrating diaphragm coils of the composite flat plate type transducers, the sound feature of a loudspeaker is controlled by controlling the lengths and areas of the two kinds of coils and the positions and sizes of the coinciding parts of the two kinds of coils, and then the low-frequency response, high-frequency response and transient state are more balanced.

Description

technical field [0001] The invention relates to the technical field of earphones, in particular to a composite diaphragm type planar earphone. 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. Under the action of this force, the diaphragm vibrate...

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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