CN202282857U - Passive radiator loudspeaker box - Google Patents
Passive radiator loudspeaker box Download PDFInfo
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- CN202282857U CN202282857U CN2011203965179U CN201120396517U CN202282857U CN 202282857 U CN202282857 U CN 202282857U CN 2011203965179 U CN2011203965179 U CN 2011203965179U CN 201120396517 U CN201120396517 U CN 201120396517U CN 202282857 U CN202282857 U CN 202282857U
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- radiator
- resonant cavity
- passive
- audio amplifier
- passive radiator
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Abstract
The utility model discloses a passive radiator loudspeaker box, comprising a box body, a loudspeaker mounted on the box body, a radiator and an inverter tube, wherein the radiator comprises at least one passive radiator; the box body comprises a first resonant cavity and a second resonant cavity, the loudspeaker is arranged in the first resonant cavity, the first resonant cavity is separated from the second resonant cavity by the radiator; the second resonant cavity is communicated with an outer part of the box body by a gas tube of the inverter tube. The playback frequency lower limit of the low frequency is reduced, the low frequency quantity sense is increased and the low-frequency transient response of the loudspeaker box is improved.
Description
[technical field]
The utility model relates to audio amplifier, relates in particular to a kind of passive radiator audio amplifier.
[background technology]
The passive radiator audio amplifier is claimed the sky basin audio amplifier that shakes again; As shown in Figure 1; Traditional passive radiant body audio amplifier is made up of a loudspeaker unit 2 and a passive radiation body unit 3, and when loudspeaker unit during with certain frequency, speaker cones promotes the air in the casing 1; 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, and the motion frequency of passive radiator is lower than the motion frequency of loud speaker at this moment, and the oscillating mass of adjustment passive radiator can obtain different LF-responses.The sound wave phase place same section of the radiative acoustic wave of passive radiator and loud speaker superposes, and makes the low frequency of audio amplifier obtain expansion.But the radiator that Traditional passive radiant body audio amplifier has only the one-level passive radiator to form.The playback frequency of low frequency is higher, the sense of low frequency amount, and the low frequency transient response of audio amplifier is relatively poor.
[summary of the invention]
The technical problem that the utility model will solve provides a kind of playback lower-frequency limit that can reduce low frequency, improves the sense of low frequency amount, improves the passive radiator audio amplifier of low frequency transient response.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is, a kind of passive radiator audio amplifier comprises casing, is installed in loud speaker, radiator and phase-reversing tube on the casing, and described radiator comprises at least 1 passive radiator; Described casing comprises first resonant cavity and second resonant cavity, and described loudspeaker arrangement is in first resonant cavity, and described radiator separates first resonant cavity and second resonant cavity; The air flue of phase-reversing tube is communicated with the outside of second resonant cavity and casing.
Above-described passive radiator audio amplifier, described casing comprises dividing plate, described dividing plate is between first resonant cavity and second resonant cavity; Described dividing plate comprises through hole, and described radiator is installed in the bulkhead through-hole position, and first resonant cavity and second resonant cavity are separated.
Above-described passive radiator audio amplifier; Described radiator comprises two described passive radiators and the framework that said passive radiator is installed; Described framework is a hexahedron; Two passive radiators are arranged on two relative faces of framework, and 1 face in addition of framework comprises described opening, remaining face closure.
Above-described passive radiator audio amplifier, two passive radiators of said radiator are arranged on two relative faces of framework symmetrically; Two passive radiators be parallel to each other or angle less than 30 °.
Above-described passive radiator audio amplifier, described radiator are installed in first resonant cavity, and the inner chamber of radiator communicates with second resonant cavity through the through hole of described opening and dividing plate.
Above-described passive radiator audio amplifier, two passive radiators of radiator are of similar shape, area, material, compliance and quality.
Above-described passive radiator audio amplifier, passive radiator be shaped as circle, ellipse, track shape or square.
The utility model can reduce the playback lower-frequency limit of low frequency, improves the sense of low frequency amount, improves the low frequency transient response of audio amplifier.
[description of drawings]
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
Fig. 1 is the cutaway view of prior art passive radiator audio amplifier.
Fig. 2 is the cutaway view of the utility model passive radiator audio amplifier embodiment 1.
Fig. 3 is the cutaway view of the utility model passive radiator audio amplifier embodiment 2.
The front view of Fig. 4 the utility model passive radiator audio amplifier embodiment 1 radiator.
Fig. 5 is that A among Fig. 4 is to cutaway view.
Fig. 6 is the cutaway view of the utility model passive radiator audio amplifier embodiment 3.
[embodiment]
The structure of the utility model embodiment 1 is as shown in Figure 2, comprises casing 1, is installed in loud speaker 2, radiator 4 and phase-reversing tube 5 on the casing 1.Comprise the first resonant cavity V1 and second resonant cavity in the casing 1.Loud speaker 2 is arranged among the first resonant cavity V1, and phase-reversing tube 5 is arranged among the second resonant cavity V2.
Phase-reversing tube 5 is installed among the second resonant cavity V2, and the air flue of phase-reversing tube 5 is communicated with the outside of the second resonant cavity V2 and casing 1.
Present embodiment is when work, and the vibrating diaphragm motion of loud speaker 2 promotes the air in the casing one-level resonant cavity V1, moves back and forth as spring in the air, promotes radiant body 401 motions on the radiator 4 simultaneously.The oscillating mass of adjustment radiator 4 passive radiators 401 just can be adjusted the resonance frequency F1 of first order resonant cavity V1; The resonance frequency of F1 is less than the resonance frequency F of loud speaker; The low frequency of audio amplifier obtains the first order and extends, the anti-phase about frequency plot sudden change 180 degree below this resonance frequency F1.The motion of radiator 4 radiant bodies 401 promotes the air movement of second level resonant cavity V2, and the air of V2 passes through phase-reversing tube again to extraneous air radiation sound wave.For second level resonant cavity V2; Radiant body 401 can see it is an active active sounding body, and this just makes up a traditional phase inverted cabinet in conjunction with phase-reversing tube 5, the sectional area of adjustment phase-reversing tube and the resonance frequency F2 that length just can be adjusted partial resonant cavity V2; The resonance frequency of F2 is less than the resonance frequency F1 of the first order; Much smaller than the resonance frequency F of loudspeaker unit, the low frequency of audio amplifier obtains second level extension and expansion, thereby obtains lower low-frequency minimum.Simultaneously the frequency plot below the first order resonance frequency F1 has been carried out the paraphase about 180 degree; Through the resonance frequency F2 after the paraphase with the phase place of upper frequency almost near the phase place of loud speaker sound wave; And superpose with the sound wave of loud speaker; The whole frequency response of audio amplifier this moment has obtained expansion, thereby obtains lower low-frequency minimum.Be that transfer of air through first order cavity V1 is to radiant body 401 from the loud speaker sounding to the phase-reversing tube sounding; Again through being delivered to the air of second level cavity V2; Be delivered to phase-reversing tube 5 at last again, this just has individual time difference, the time-delay of nearly a few tens of milliseconds; 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 resonance frequency of regulating resonant cavity V1 and V2 simultaneously can obtain different low frequency characteristics, decides according to low frequency characteristics orientation.The frequency of sound wave that radiant body 401, phase-reversing tube 5 and loud speaker 2 are sent superposes just can obtain quite perfectly LF-response.But if adjustment is bad, do not handle phase relation well, paraphase sound wave in the second level will destroy the frequency response of the first order, makes the low frequency deterioration of audio amplifier.
The structure of the utility model embodiment 2 such as Fig. 3 are to shown in Figure 5; As embodiment 1 different be; Radiator 4 comprises two passive radiators 401 and the framework 402 that passive radiator 401 is installed, and framework 402 is a hexahedron, and two passive radiators 401 are arranged on two relative faces of framework 402; 1 face in addition of framework 402 comprises opening, all the other 3 face closures.
Two passive radiators 401 are parallel and be of similar shape, area, material, compliance and quality.The inner chamber of radiator 4 communicates with the second resonant cavity V2 through the through hole of opening, dividing plate 102.
The radiator 4 of present embodiment adopts two identical passive radiator 401 symmetrical expressions that an emitter assemblies of forming is installed; Its effectively vibration area increased by 1 times than the effective vibration area that adopts the single passive radiant body, so the swept area of swept area when adopting single radiant body increased by 1 times, the amount of flow of air also increases and is twice; Oscillation Amplitude is also little than the vibration spoke degree that adopts single radiant body; Thereby reduced distortion, improved transient response, the sense of low frequency amount gets a promotion.Simultaneously; Because the symmetrical expression design is all adopted in the radiation of two-stage; The direction of motion of the radiant body that two oscillating mass are identical is opposite, and the inertia force that is produced is identical, and such two power are cancelled out each other; 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 structure of the utility model embodiment 3 and principle such as Fig. 6, shown in Figure 7, different with embodiment 2 is that radiator 4 has adopted symmetrical non-parallel structure.Two passive radiator 401 symmetries are installed in hexahedron framework 402 upper and lower surfaces non-parallelly, form one 8 ° angle between two passive radiators 401.
When using non-parallel symmetrical passive radiator 401, between two passive radiators 401 shape in an angle, two radiant bodies 401 have angle and when promoting air, can make the speed of air movement faster, the transient response that can improve low frequency.
More than among each embodiment, the shape of passive radiator 401 can be circular, oval, track shape or square.
The radiant body embedding structure has reduced the limitation of external passive radiator cosmetic variation, has improved the flexibility that appearance and modeling changes.
The above embodiment of the utility model has broken the single mode of operation of Traditional passive radiant body audio amplifier; Be delivered to second level phase-reversing tube again through air in the motion promotion cavity of first order radiant body; Principle because of the following phase place anti-phase of first order cavity resonant frequency; Utilizing second level phase-reversing tube that the phase place anti-phase is become positive utilizes again; Low frequency energy obtains utilizing once more, promotes the outside radiative acoustic wave of casing outer air by second level phase-reversing tube again, and superposeing with the sound wave of loud speaker obtains the low frequency lower than first order resonance frequency.But the tuned frequency of two-stage is different; Partial tuned frequency is lower than the first order; To reach lower lower-frequency limit, promote the amount sense of low frequency, improve low frequency transient response ability; And the time-delay of a few tens of milliseconds has been arranged after the radiant body transmission of sound wave through two-stage, improved the richness of low frequency from sense of hearing.
The preferred embodiment that the above is merely the utility model is not limited to the present invention, allly within spirit of the present invention and principle, does fixed any modification, is equal to replacement and improvement etc., all should be included within the utility model protection range.
Claims (7)
1. a passive radiator audio amplifier comprises casing and is installed in the loud speaker on the casing, it is characterized in that, comprise radiator and phase-reversing tube, described radiator comprises at least 1 passive radiator; Described casing comprises first resonant cavity and second resonant cavity, and described loudspeaker arrangement is in first resonant cavity, and described radiator separates first resonant cavity and second resonant cavity; Described phase-reversing tube is arranged in second resonant cavity, and the air flue of phase-reversing tube is communicated with the outside of second resonant cavity and casing.
2. passive radiator audio amplifier according to claim 1 is characterized in that described casing comprises dividing plate, and described dividing plate is between first resonant cavity and second resonant cavity; Described dividing plate comprises through hole, and described radiator is installed in the bulkhead through-hole position, and first resonant cavity and second resonant cavity are separated.
3. passive radiator audio amplifier according to claim 2; It is characterized in that; Described radiator comprises two described passive radiators and the framework that said passive radiator is installed, and described framework is a hexahedron, and two passive radiators are arranged on two relative faces of framework; 1 face in addition of framework comprises described opening, remaining face closure.
4. passive radiator audio amplifier according to claim 3 is characterized in that, two passive radiators of said radiator are arranged on two relative faces of framework symmetrically; Two passive radiators be parallel to each other or angle less than 30 °.
5. passive radiator audio amplifier according to claim 3 is characterized in that, described radiator is installed in first resonant cavity, and the inner chamber of radiator communicates with second resonant cavity through the through hole of described opening and dividing plate.
6. passive radiator audio amplifier according to claim 3 is characterized in that, two passive radiators of radiator are of similar shape, area, material, compliance and quality.
7. passive radiator audio amplifier according to claim 1 is characterized in that, passive radiator be shaped as circle, ellipse, track shape or square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203965179U CN202282857U (en) | 2011-10-18 | 2011-10-18 | Passive radiator loudspeaker box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203965179U CN202282857U (en) | 2011-10-18 | 2011-10-18 | Passive radiator loudspeaker box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202282857U true CN202282857U (en) | 2012-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203965179U Expired - Fee Related CN202282857U (en) | 2011-10-18 | 2011-10-18 | Passive radiator loudspeaker box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202282857U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103841477A (en) * | 2014-01-28 | 2014-06-04 | 李世煌 | Acoustic structure with passive vibrating diaphragm unit |
| CN105142065A (en) * | 2015-08-18 | 2015-12-09 | 无锡杰夫电声有限公司 | Sound box based on oppositely buckled passive radiator |
| CN110830879A (en) * | 2018-08-09 | 2020-02-21 | 广西三诺数字科技有限公司 | Bass enhanced sound box |
| WO2021026786A1 (en) * | 2019-08-13 | 2021-02-18 | 海能达通信股份有限公司 | Acoustic radiation assembly and sound emitting device |
-
2011
- 2011-10-18 CN CN2011203965179U patent/CN202282857U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103841477A (en) * | 2014-01-28 | 2014-06-04 | 李世煌 | Acoustic structure with passive vibrating diaphragm unit |
| CN105142065A (en) * | 2015-08-18 | 2015-12-09 | 无锡杰夫电声有限公司 | Sound box based on oppositely buckled passive radiator |
| CN110830879A (en) * | 2018-08-09 | 2020-02-21 | 广西三诺数字科技有限公司 | Bass enhanced sound box |
| WO2021026786A1 (en) * | 2019-08-13 | 2021-02-18 | 海能达通信股份有限公司 | Acoustic radiation assembly and sound emitting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120620 Termination date: 20161018 |