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Loudspeaker with double-diaphragm structure and driving method

A loudspeaker and double-diaphragm technology, which is applied in the field of loudspeakers, can solve the problems of large diaphragm stiffness, insufficient low-frequency bandwidth, and high resonance frequency, and achieve the effects of reducing resonance frequency, enhancing bass effect, and increasing vibration quality

Active Publication Date: 2018-08-31
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 with double-diaphragm structure and driving method
  • Loudspeaker with double-diaphragm structure and driving method
  • Loudspeaker with double-diaphragm 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 speaker with a dual diaphragm structure, such as Figure 1 to Figure 3 As shown, the moving magnet and piezoelectric composite broadband speaker with a dual diaphragm structure includes a housing and a first vibration element and a second vibration element arranged in the housing, and also includes a moving magnet 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 include polyethylene naphthalate fiber (PEN), polyether ketone fiber (PEEK) and other internal polymer materials, or FR...

Embodiment 2

[0070] This embodiment provides a moving magnet and piezoelectric composite broadband speaker with a dual diaphragm structure, and its structure is basically the same as the first embodiment, such as Figure 4 As shown, it includes a housing and a first diaphragm 3 and a second diaphragm 6 arranged in the housing. It also includes a moving magnet drive assembly and a piezoelectric drive assembly. The moving magnet drive assembly is used to drive the first diaphragm 3 to vibrate and press The electric drive component is used to drive the second diaphragm 6 to vibrate. The moving magnet drive assembly includes a voice coil 5, a ring-shaped magnetic conductive plate 7 and a columnar first magnet 9 which are all attached to the inner surface of the first diaphragm 3 in order from the outer circumference to the center. A vibrating plate 4 is attached to the side surface. The piezoelectric drive assembly includes a piezoelectric ceramic 10 attached to the outer surface of the second ...

no. 3 example

[0080] This embodiment provides a method for driving a wide-band speaker. The method includes providing a first vibrating part. The first vibrating part includes a first vibrating element and a moving magnet drive assembly. The moving magnet drive assembly drives the first The vibration unit vibrates;

[0081] Providing a second vibrating part, the second vibrating part comprising a second vibrating element and a piezoelectric driving assembly, the piezoelectric driving assembly driving the second vibrating unit to vibrate;

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

[0083] The moving magnet drive assembly of the speaker provided by the present invention is mainly used for reproducing low and midrange, and the piezoelectric drive assembly is mainly used for replaying midrange and high frequencies; the two frequency response curves complement each other and can achieve better audio effects.

[0084] Preferably, the m...

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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, and in particular to a moving magnet and piezoelectric composite wide-band loudspeaker with a double diaphragm structure. Background technique [0002] The loudspeaker is an electric-power-sound transducer, which is an important component in audio equipment. Speakers are widely used in people's daily life, bringing a lot of convenience. In the fields of electronic products such as automobiles, radio, TV, speakers, mobile phones, MP4, and computers, the application of speakers can be seen almost everywhere. There are many types of speakers. According to their energy conversion principles, they 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 frequency range It can be divided into woofer, midrange speaker and tweeter, among which moving magnet speakers are the most widely us...

Claims

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Application Information

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