CN202172481U - Two-stage passive radiator sound box - Google Patents

Two-stage passive radiator sound box Download PDF

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Publication number
CN202172481U
CN202172481U CN2011200950843U CN201120095084U CN202172481U CN 202172481 U CN202172481 U CN 202172481U CN 2011200950843 U CN2011200950843 U CN 2011200950843U CN 201120095084 U CN201120095084 U CN 201120095084U CN 202172481 U CN202172481 U CN 202172481U
Authority
CN
China
Prior art keywords
passive radiator
casing
passive
sound box
stage
Prior art date
Application number
CN2011200950843U
Other languages
Chinese (zh)
Inventor
张锋
Original Assignee
张锋
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 张锋 filed Critical 张锋
Priority to CN2011200950843U priority Critical patent/CN202172481U/en
Application granted granted Critical
Publication of CN202172481U publication Critical patent/CN202172481U/en

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Abstract

The utility model discloses a two-stage passive radiator sound box comprising a loudspeaker unit and a passive radiator unit, wherein the passive radiator unit is divided into two stages, vibration qualities of the two stages of the radiators are different totally, but compliances, sizes and materials of the two stages of the radiators can be either the same or different; the number of the passive radiator in the each stage can be one or more; and a first stage passive radiator is arranged inside the sound box, a second stage passive radiator is arranged on a bottom surface, a side surface, a front surface, a back surface or a top surface of the sound box. Therefore, the two-stage passive radiator sound box of the utility model can reduce a lower limit of a low frequency, can raise a quantity feeling of the low frequency, and can improve a transient reaction capacity of the low frequency through a two-stage resonance.

Description

A kind of secondary passive radiator audio amplifier
Technical field
The utility model relates to a kind of audio amplifier, relates to the secondary passive radiator audio amplifier of a kind of playback than the low-frequency sound effect especially.
Technical background
The passive radiator audio amplifier is claimed the sky basin audio amplifier that shakes again, and as shown in Figure 1, Traditional passive radiant body audio amplifier is made up of a loudspeaker unit and a passive radiation body unit; During work; The loudspeaker unit motion promotes the air in the casing, and airborne molecule moves back and forth as spring, promotes the passive radiator motion simultaneously; Passive radiator promotes outside air with certain frequency movement and produces low frequency, makes the low frequency of audio amplifier obtain expansion.
Summary of the invention
The purpose of the utility model provides a kind of playback lower-frequency limit that reduces low frequency, improves the sense of low frequency amount, improves the secondary passive radiator audio amplifier of low frequency transient response.
For realizing above-mentioned purpose, the utility model adopts following technical scheme:
A kind of secondary passive radiator audio amplifier; Comprise casing and be installed in the loud speaker on the casing, it is characterized in that two vibration cavitys are arranged in the casing; Separate by first order passive radiator between described two cavitys, also comprise the second level passive radiator that is installed on the casing.The oscillating mass of this second-order radiation body unit is different fully.The quantity of every grade of radiant body is one or more, and a plurality of passive radiators are of similar shape, area, material, compliance, quality; First order passive radiator is installed in the inside of casing, and to separate two cavitys, second level passive radiator is installed in bottom surface, two sides, front-back or the end face of casing, is shaped as circle, ellipse, track shape or square or need and decide according to box shape.
The beneficial effect of the utility model is; The single mode of operation of the passive radiator audio amplifier that breaks traditions; Be delivered to second level radiant body again through air in the motion promotion cavity of first order radiant body, the motion by second level radiant body promotes the outside radiative acoustic wave of casing outer air again.But the tuned frequency of two-stage is different, and partial tuned frequency will be lower than the first order, to reach lower lower-frequency limit, promotes the amount sense of low frequency, improves low frequency transient response ability.The even number radiant body is parallel to be installed in symmetrically that can to avoid casing in use to produce on the casing mobile if each grade radiant body has.
Description of drawings
Fig. 1 is the mounting structure sketch map of prior art passive radiator audio amplifier;
Fig. 2 is installed in the generalized section of back for the utility model single passive radiant body;
Fig. 3 a is the side schematic view that two passive radiator symmetries of the utility model are installed in two sides;
Fig. 3 b is the generalized section that two passive radiator symmetries of the utility model are installed in two sides;
Fig. 4 is the utility model loud speaker and the superimposed sketch map of passive radiation bulk acoustic wave;
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
As shown in Figure 2, casing is two resonant cavities, is separated by first order passive radiator.During work, the loudspeaker unit motion promotes the air in the casing, and airborne molecule moves back and forth as spring, promotes first order passive radiator S1 motion simultaneously.The oscillating mass of adjustment first order passive radiator just can be adjusted the resonance frequency F1 of first order resonant cavity V1, and the resonance frequency F1 of first order resonant cavity V1 is less than the resonance frequency F of loud speaker at this moment, and the low frequency of audio amplifier obtains the first order and extends.The motion of first order passive radiator promotes the air movement of second level resonant cavity V2 again, and the air of V2 promotes the motion of second level passive radiator S2 again, thereby second level passive radiator links to each other to extraneous radiative acoustic wave with outside air.For second level resonant cavity V2; First order passive radiator S1 can regard an active active sounding body as; Second level passive radiator S2 is passive passive radiant body, and this just makes up a Traditional passive radiant body audio amplifier, and the oscillating mass of adjusting the second level passive radiator S2 this moment just can be adjusted the resonance frequency F2 of second level resonant cavity V2; The resonance frequency F2 of second level resonant cavity V2 is less than the resonance frequency F1 of first order resonant cavity V1 at this moment; Much smaller than the resonance frequency F of loudspeaker unit, the low frequency of audio amplifier obtains second level extension and expansion, rolls off the production line thereby obtain lower low frequency.Simultaneously; From the loud speaker sounding to the second level passive radiator S2 sounding be transfer of air through first order resonant cavity to first order passive radiator S1, be delivered to the air of second level resonant cavity V2 again with first order passive radiator S1, be delivered to second level passive radiator S2 at last again; This just has the individual time difference; S2 has the time-delay of nearly a few tens of milliseconds, and this time-delay loud speaker that is added to just in time can increase the richness of sound, makes low frequency more plentiful, abundant.The oscillating mass of regulating radiant body S1 and S2 simultaneously can obtain different low frequency characteristics, decides according to low frequency characteristics orientation.The frequency of sound wave that radiant body S1, S2 and loud speaker are sent superposes just can obtain quite perfectly LF-response.As shown in Figure 4.If with passive radiator at different levels adopt two be of similar shape, the radiant body of area, material, compliance, quality.Shown in Fig. 3 a, Fig. 3 b; Two identical passive radiator symmetrical expressions of employings at different levels are installed its effective vibration area that effectively vibrates area ratio employing single passive radiant body has increased by 1 times; Therefore the swept area of swept area when adopting single radiant body increased by 1 times; Oscillation Amplitude is also little than the vibration spoke degree that adopts single radiant body, thereby has reduced distortion, has improved transient response.And be that relative twocouese carries out radiation, so the amount sense of low frequency is greatly improved.Simultaneously, owing to be symmetrical design, the direction of motion of two identical radiant bodies is opposite; The inertia force that is produced is identical; Such two power are cancelled out each other, and it is mobile to have avoided the inertia force that motion produced because of radiant body that audio amplifier is in use produced, and has improved practicality greatly.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, within all spirit and principles at the utility model do fixed any modification, be equal to replacement and improvement etc., all should be included within the utility model protection range.

Claims (3)

1. secondary passive radiator audio amplifier; Comprise casing and be installed in the loud speaker on the casing, it is characterized in that two vibration cavitys are arranged in the casing; Separate by first order passive radiator between described two cavitys, also comprise the second level passive radiator that is installed on the casing.
2. secondary passive radiator audio amplifier according to claim 1 is characterized in that the passive radiation body unit that is installed on the casing has secondary, and the oscillating mass of this second-order radiation body unit is different fully.
3. secondary passive radiator audio amplifier according to claim 1 and 2 is characterized in that the quantity of every grade of radiant body is one or more, and a plurality of passive radiators are of similar shape, area, material, compliance, quality; First order passive radiator is installed in the inside of casing, and to separate two cavitys, second level passive radiator is installed in bottom surface, two sides, front-back or the end face of casing, is shaped as circle, ellipse, track shape or square.
CN2011200950843U 2011-04-02 2011-04-02 Two-stage passive radiator sound box CN202172481U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011200950843U CN202172481U (en) 2011-04-02 2011-04-02 Two-stage passive radiator sound box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011200950843U CN202172481U (en) 2011-04-02 2011-04-02 Two-stage passive radiator sound box

Publications (1)

Publication Number Publication Date
CN202172481U true CN202172481U (en) 2012-03-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011200950843U CN202172481U (en) 2011-04-02 2011-04-02 Two-stage passive radiator sound box

Country Status (1)

Country Link
CN (1) CN202172481U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104159179A (en) * 2014-06-30 2014-11-19 歌尔声学股份有限公司 Loudspeaker module group
CN108513229A (en) * 2016-08-31 2018-09-07 广东欧珀移动通信有限公司 A kind of sound cavity apparatus and mobile terminal of mobile terminal
CN109151674A (en) * 2016-05-16 2019-01-04 广东欧珀移动通信有限公司 Speaker system and corresponding mobile terminal
CN109803215A (en) * 2018-12-18 2019-05-24 歌尔股份有限公司 Acoustic apparatus and electronic equipment

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104159179A (en) * 2014-06-30 2014-11-19 歌尔声学股份有限公司 Loudspeaker module group
US10117018B2 (en) 2014-06-30 2018-10-30 Goertek Inc. Speaker module
CN104159179B (en) * 2014-06-30 2018-12-04 歌尔股份有限公司 Loudspeaker mould group
CN109151674B (en) * 2016-05-16 2021-03-02 Oppo广东移动通信有限公司 Loudspeaker system and corresponding mobile terminal
CN109151674A (en) * 2016-05-16 2019-01-04 广东欧珀移动通信有限公司 Speaker system and corresponding mobile terminal
CN108513229A (en) * 2016-08-31 2018-09-07 广东欧珀移动通信有限公司 A kind of sound cavity apparatus and mobile terminal of mobile terminal
CN109803215A (en) * 2018-12-18 2019-05-24 歌尔股份有限公司 Acoustic apparatus and electronic equipment
CN109803215B (en) * 2018-12-18 2021-01-22 歌尔股份有限公司 Acoustic device and electronic apparatus

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Granted publication date: 20120321

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