Sound production device

Abstract

The invention provides a sound production device, which comprises a basin frame, a vibration system and a magnetic circuit system. The vibration system comprises an upper vibrating diaphragm, the upper vibrating diaphragm being fixed on the basin frame and defines an accommodating space together with the basin frame, and one side, far away from the magnetic circuit system, of the upper vibrating diaphragm being communicated with the outside and serving as an upper front cavity for the upper vibrating diaphragm to produce sound; an annular lower vibrating diaphragm, wherein the outer peripheralside of the lower vibrating diaphragm is fixed on the basin frame; an upper framework, connected with the voice coil and the upper vibrating diaphragm, and the lower framework being connected with the lower vibrating diaphragm. The outer peripheral side of the isolation vibrating diaphragm is connected with the basin frame, the inner peripheral side of the isolation vibrating diaphragm is connected with the upper framework and the lower framework, and the lower vibrating diaphragm, the lower framework, the isolation vibrating diaphragm and the basin stand jointly divide the accommodating space into a lower front cavity used for sounding of the lower vibrating diaphragm and a rear cavity used for sharing of the lower vibrating diaphragm and the upper vibrating diaphragm. The basin frame isprovided with a sounding hole which enables the lower front cavity to be communicated with the outside. Compared with the prior art, the sound production device is higher in acoustic loudness and better in acoustic performance.

Description

【Technical field】 [0001] The invention relates to the field of electroacoustic conversion, in particular to a sound generating device used in electronic sound box products. 【Background technique】 [0002] The sound-generating device in the related art includes a pot frame, a vibration system fixed to the pot frame, and a magnetic circuit system with a magnetic gap. The magnetic circuit system drives the vibration system to vibrate and produce sound. The vibration system includes a The frame is used to vibrate and sound the diaphragm, the dome attached to the diaphragm is close to the skeleton on the side of the magnetic circuit system, and the sound is inserted in the magnetic gap and connected with the skeleton to drive the diaphragm to vibrate. lock up. [0003] However, in the sound-generating device of the related art, the vibration system and the magnetic circuit system are stacked up and down, and the structure of the magnetic circuit system is limited in the sound-ge...

AI Technical Summary

Problems solved by technology

[0003] However, in the sound-generating device of the related art, the vibration system and the magnetic circuit system are stacked up and down, and the structure of the magnetic circuit system is limited in the sound-generating device of the same height, thereby limiting the BL value of its magnetic field; in addition , the sound-generating device has only one diaphragm structure, and the effective vibration area (SD) of the diaphragm is small, thereby limiting the loudness of the sound-generating device

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