Loudspeaker having dual-membrane structure and driving method

A loudspeaker and dual-diaphragm technology, applied in the field of loudspeakers, can solve the problems of high rigidity of the diaphragm, high resonant frequency, poor low-frequency playback effect, etc., and achieve the effect of reducing the resonant frequency, increasing the vibration quality, and having a compact and lightweight structure.

Active Publication Date: 2015-09-23
SHENZHEN JINGTUO INNOVATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since piezoelectric ceramics and vibrating plates are much larger than the diaphragm stiffness of moving magnet speakers, the corresponding resonant frequency is obviously higher. Under the same caliber conditions, the low-frequency reproduction effect of the piezoelectric ceramic sounding part is obviously poor. Insufficient low-frequency bandwidth compared to traditional moving magnet speakers
However, due to the size limitation, the sound output of the small and medium-sized speakers in this patent is insufficient, and the low-frequency bandwidth is also insufficient, which may not be enough to make up for the overall low-frequency reproduction effect
Generally speaking, this patent belongs to a simple combined innovation of piezoelectric structure and moving magnetic structure, focusing on making up for the high-frequency sound quality of piezoelectric speakers through moving magnetic speakers, but the low-frequency characteristics and low-frequency bandwidth are not suitable for some high-demand Applications

Method used

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  • Loudspeaker having dual-membrane structure and driving method
  • Loudspeaker having dual-membrane structure and driving method
  • Loudspeaker having dual-membrane structure and driving method

Examples

Experimental program
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Effect test

Embodiment 1

[0060] This embodiment provides a moving magnet and piezoelectric composite broadband loudspeaker with a dual-diaphragm structure, such as Figure 1 to Figure 3 As shown, the moving magnet and piezoelectric composite broadband loudspeaker with double-diaphragm structure includes a casing, a first vibrating element and a second vibrating element arranged in the casing, and a moving magnetic drive assembly and a piezoelectric drive assembly. The magnetic drive assembly is used to drive the first vibration unit to vibrate, and the piezoelectric drive assembly is used to drive the second vibration unit to vibrate. In this embodiment, the first vibration unit is the first diaphragm 3 . The second vibration unit is the second diaphragm 6, and the material of the second diaphragm 6 can be metal materials including nickel-iron alloy, stainless steel, etc., or polyethylene naphthalate fiber (PEN), polyether ketone fiber (PEEK) and other internal polymer materials, or fiber resin compo...

Embodiment 2

[0070] This embodiment provides a dynamic-magnet and piezoelectric composite broadband loudspeaker with a dual-diaphragm structure, the structure of which is basically the same as that of Embodiment 1, as Figure 4 As shown, it includes a casing and a first diaphragm 3 and a second diaphragm 6 arranged in the casing, and also includes a dynamic magnetic drive assembly and a piezoelectric drive assembly. The dynamic magnetic drive assembly is used to drive the first diaphragm 3 to vibrate, and the pressure The electric drive assembly is used to drive the second diaphragm 6 to vibrate. The moving magnetic drive assembly includes a voice coil 5, a ring-shaped magnetic guide plate 7, and a columnar first magnet 9 that are sequentially attached to the inner surface of the first diaphragm 3 from the outer circumference to the center. The outer surface of the first diaphragm 3 A vibrating plate 4 is attached to the side. The piezoelectric drive assembly includes a piezoelectric cera...

no. 3 example

[0080] This embodiment provides a driving method for a broadband speaker, the method includes providing a first vibrating part, the first vibrating part includes a first vibrating element and a moving magnetic driving assembly, and the moving magnetic driving assembly drives the first The vibration unit vibrates;

[0081] providing a second vibration part, the second vibration part includes a second vibration element and a piezoelectric drive assembly, the piezoelectric drive assembly drives the second vibration unit to vibrate;

[0082] The frequency response curves of the first vibration part and the second vibration part are different.

[0083] The moving magnet driving assembly of the loudspeaker provided by the present invention is mainly used for reproducing low and middle tones, and the piezoelectric driving assembly is mainly used for reproducing middle and high tones; the two frequency response curves complement each other to obtain better audio effects.

[0084] Pre...

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PUM

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Abstract

The invention discloses a loudspeaker having a dual-membrane structure, in particular to a moving-magnetic and piezoelectric composite broadband loudspeaker and a driving method of the loudspeaker. The composite loudspeaker comprises a housing and a vibrating element installed in the housing, wherein the vibrating element comprises a first vibrating element and a second vibrating element; the composite loudspeaker further comprises a moving-magnetic driving component used for driving the first vibrating element vibrate and a piezoelectric driving component used for driving the second vibrating element vibrate. The moving-magnetic driving component of the loudspeaker provided by the invention is mainly used for replaying low-mid pitch; the piezoelectric driving component is mainly used for replaying mid-high pitch; the moving-magnetic part and the piezoelectric part have the same aperture, which can ensure a lower resonance frequency and ensure a larger acoustical output; a magnet, a concentrating flux plate and a concentrating flux bowl are directly connected with a vibration unit, thereby increasing the vibration mass, reducing the resonance frequency and further enhancing the bass effect; the composite loudspeaker has the advantages of compact and light structure, wide frequency band and so on.

Description

technical field [0001] The invention relates to the technical field of loudspeakers, in particular to a dynamic-magnet and piezoelectric composite broadband loudspeaker with a double-diaphragm structure. Background technique [0002] The loudspeaker is an electric-force-acoustic transducer, which is an important component in audio equipment. Loudspeakers are widely used in people's daily life and bring a lot of convenience. In the fields of electronic products such as automobiles, radio, TV, speakers, mobile phones, MP4, computers, etc., the applications of loudspeakers can be seen almost everywhere. There are many types of loudspeakers, which can be divided into electric type (ie, moving magnet type), electrostatic type (ie, capacitive type), moving magnet type (ie, reed type), piezoelectric type, etc. according to their energy conversion principles; according to the frequency range It can be divided into woofers, midrange speakers, and tweeters, among which moving magnet ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R17/00
Inventor 张韬闫鑫
Owner SHENZHEN JINGTUO INNOVATION TECH
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