CN102630066B - Eight-order band-pass speaker box and television - Google Patents
Eight-order band-pass speaker box and television Download PDFInfo
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- CN102630066B CN102630066B CN201210042439.1A CN201210042439A CN102630066B CN 102630066 B CN102630066 B CN 102630066B CN 201210042439 A CN201210042439 A CN 201210042439A CN 102630066 B CN102630066 B CN 102630066B
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Abstract
The invention relates to a speaker box and provides an eight-order band-pass speaker box and a television. The eight-order band-pass speaker box comprises a box possessing a cavity. Three baffles, which can be used to divide the cavity into four chambers, are arranged in the cavity, wherein two baffles are provided with loudspeakers respectively and four chambers are provided with inverted tubes respectively. According to the invention, three baffles are used to divide the cavity into four chambers, one inverted tube is arranged in each chamber and two baffles are provided with loudspeakers respectively. Therefore, two small loudspeakers can be used to achieve an effect of one large loudspeaker. A speaker box appearance can be ultrathin and super-narrow and a low frequency sound effect can be prominent. A problem that the small loudspeaker can not send out a low frequency can be solved. Applying the speaker box in the television can not destroy the overall appearance of the ultrathin flat television and can improve an acoustic characteristic of the television.
Description
Technical field
The present invention relates to audio amplifier, more particularly, relate to a kind of eight rank band-pass speakers and adopt the television set of this audio amplifier.
Background technology
At present, be applied in the built-in speaker of television set, conventional is phase inverting box or closed box.These phase inverting box or closed box are subject to the restriction in space in television set, and its volume is generally less, and along with the extensive use of panel TV set, these phase inverting box or closed box require more and more thinner, and like this, in audio amplifier, loud speaker is subject to thickness effect, stroke diminishes, and low-frequency effect is very poor.
For improving the audio frequency effect of above-mentioned audio amplifier, in prior art, also adopt some eight rank band-pass speakers to substitute.At present eight traditional rank band-pass speakers are generally based on as Fig. 1 and two kinds of structural principles of Fig. 2.These two kinds of structures by casing 100 ', two baffle plates 200 ', a loud speaker 300 ' and three phase-reversing tube 400 ' compositions.Loud speaker 300 ' vibrating diaphragm driven after, produce vibration and by making air vibration with the Air Coupling of casing 100 ' interior, casing 100 ' interior air and phase-reversing tube 400 ' coupling to space radiation sound wave, is positioned at the different sound wave of the phase-reversing tube 400 of diverse location ' send.Like this, rely on three phase-reversing tubes 400 ' acoustic mass and by the acoustic compliance of three chambers of two baffle plates 200 ' be separated to form, form three Helmholtz and reflect tuned frequency, thereby form the logical case of eight rank bands.Referring again to Fig. 3, Fig. 4, it is the acoustics equivalent electric circuit of above-mentioned two kind of eight rank band-pass speaker.Wherein,
Eg-acoustic pressure source;
Rg---signal source internal resistance;
Re---loud speaker direct current resistance;
The acoustic mass of Csp---loudspeaker unit vibrational system (comprising air load);
Rmsp---the acoustic resistance of loudspeaker unit vibrational system loss;
Lsp---the acoustic compliance of loudspeaker unit vibrational system;
C α---phase-reversing tube α equivalent sound quality;
Lv---V chamber equivalent sound is suitable;
C β---phase-reversing tube β equivalent sound quality;
Lu---U chamber equivalent sound is suitable;
C γ---phase-reversing tube γ equivalent sound quality;
Lw---W chamber equivalent sound is suitable;
In above-mentioned equivalent electric circuit, can find out, Lu and C α, Lw and C γ form respectively step low-pass, and C β and Lv, Csp and Lsp form respectively second order high pass, therefore, it is logical that this structure can form eight rank bands, energy is all concentrated in effective bandwidth, greatly improved the phonation efficiency of loud speaker and casing.
Although leading to, the eight rank bands that make based on above-mentioned principle there is certain acoustical quality, but its audio amplifier all adopts a loud speaker, loud speaker takes up room greatly, and it is very thin that audio amplifier can not be done, therefore along with the lightening development of television set, its application also will be subject to further restriction.
Summary of the invention
Technical problem to be solved by this invention is to overcome the defect of prior art, provide a kind of simple in structure, acoustical quality good, and eight rank band-pass speakers of thin thickness and the television set that adopts this eight rank band-pass speakers.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of eight rank band-pass speakers are provided, comprise the casing with cavity, in described cavity, be provided with three and described cavity can be divided into the baffle plate of four chambers, wherein on two baffle plates, be respectively equipped with a loud speaker, in described four chambers, be equipped with a phase-reversing tube.
Particularly, described three baffle plates comprise the first baffle plate, the second baffle be arrangeding in parallel and the 3rd baffle plate intersecting vertically with described the first baffle plate and second baffle, and described two loud speakers are located at respectively on described the first baffle plate and second baffle.
Further, described two loud speakers are located at respectively the first baffle plate position corresponding with second baffle, and adopt serial or parallel connection mode to connect between two loud speakers.
Further, the opening direction of described two loud speakers is relative.
Or the opening direction of described two loud speakers is identical.
Further, described in each, the port wall of phase-reversing tube is all bent to form rib to port outside.
Further, on the baffle plate that described in each, phase-reversing tube is located on the wall box that each chamber is corresponding or each chamber is corresponding.
The present invention also provides a kind of television set, comprises liquid crystal display screen main body, and it also comprises eight above-mentioned rank band-pass speakers.
Particularly, described liquid crystal display screen main body back is provided with a hanger that can be hung on metope, and described eight rank band-pass speakers are built in described hanger.
Or the bottom of described liquid crystal display screen main body is provided with a base, described eight rank band-pass speakers are built in described base.
In the present invention, adopt three baffle plates that the cavity of casing is separated into four chambers, and in each chamber, one phase-reversing tube is set, and in wherein on two baffle plates, a loud speaker being set respectively, like this, with two little loud speakers, can reach the effect of a large loud speaker, not only make audio amplifier outward appearance ultra-thin super narrow, and low frequency audio is outstanding, has solved the problem that little loud speaker can not sent out low frequency; This audio amplifier is applied to television set, not only can not destroys the overall appearance of ultrathin flat television set, and the acoustic characteristic of television set is improved greatly.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of existing eight rank audio amplifiers;
Fig. 2 is the another kind of structural representation of existing eight rank audio amplifiers;
Fig. 3 is the acoustics equivalent circuit diagram of eight rank audio amplifiers shown in Fig. 1;
Fig. 4 is the acoustics equivalent circuit diagram of eight rank audio amplifiers shown in Fig. 2;
Fig. 5 is the first embodiment schematic diagram of eight rank audio amplifiers provided by the invention;
Fig. 6 is the second embodiment schematic diagram of eight rank audio amplifiers provided by the invention;
Fig. 7 is that the audio frequency of eight rank audio amplifiers provided by the invention rings curve chart;
Fig. 8 is the impedance plot of eight rank audio amplifiers provided by the invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
In the present invention, a kind of eight rank band-pass speaker and television sets are provided, described eight rank band-pass speakers adopt three baffle plates that the cavity of casing is separated into four chambers, and in each chamber, one phase-reversing tube is set, and in wherein a loud speaker being set respectively on two baffle plates, like this, with two little loud speakers, can reach the effect of a large loud speaker, not only make audio amplifier outward appearance ultra-thin super narrow, and low frequency audio is outstanding, has solved the problem that little loud speaker can not sent out low frequency; This audio amplifier is applied to television set, not only can not destroys the overall appearance of ultrathin flat television set, and the acoustic characteristic of television set is improved greatly.
It should be noted that, according to utilizing two little loud speakers to substitute a large loud speaker in the present embodiment, reach above-mentioned this thinking of technique effect, when utilizing more multi-loudspeaker also can form eight rank band-pass speakers from different baffle plates, different phase-reversing tube combinations, but from each side such as cost, audio, outward appearances, consider, embodiment provided by the invention is best technical scheme.Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Embodiment mono-
With reference to Fig. 5, be a kind of eight rank band-pass speaker structural representations provided by the invention.Described eight rank audio amplifiers comprise the casing 100 with cavity 110, are provided with three baffle plates that can be divided into four chambers 111 in cavity 110.Wherein, three baffle plates comprise the first baffle plate 120 of be arrangeding in parallel, second baffle 121 and the 3rd baffle plate 123, the first baffle plates 120 that intersect vertically with the first baffle plate 120 and second baffle 121 and second baffle 121 on be respectively equipped with a loud speaker 130.In each chamber 111, be equipped with a phase-reversing tube 140.In the present invention, adopt three baffle plates that the cavity of casing 100 is separated into four chambers 111, and in each chamber 111, a phase-reversing tube is set, and in wherein on two baffle plates, a loud speaker 130 being set respectively, like this, with two little loud speakers 130, can reach the effect of a large loud speaker, not only make audio amplifier outward appearance ultra-thin super narrow, and low frequency audio is outstanding, has solved the problem that little loud speaker can not sent out low frequency.
It should be noted that; in the present invention; the layout that arranges of three baffle plates is not limited to above-mentioned form; as long as three baffle plates are separated into four chambers by cavity; wherein on two baffle plates, loud speaker is all set, and is equipped with a phase-reversing tube in each chamber, all can meet the requirement of above-mentioned eight rank band-pass speakers; all can obtain Ultrathin speaker and good low frequency audio, all within protection range of the present invention.
Further, in the present embodiment, two loud speakers 130 are located at respectively the first baffle plate 120 and the corresponding position of second baffle 121, like this, are beneficial to audio amplifier interior layout; Meanwhile, two-loudspeaker 130 correspondences are positioned at the center of the first baffle plate 120 and second baffle 121, make each baffle plate keep balance, and while avoiding loud speaker 130 work, each baffle plate makes a noise because imbalance produces vibrations.Certainly, loud speaker 130 also can be located at other position of each baffle plate.Between two loud speakers 130, adopt serial or parallel connection mode to connect.No matter adopt serial or parallel connection mode to connect, be all for total impedance and Circuit Matching.Wherein, adopt parallel way, single loud speaker relatively, equivalent volume strengthens two times, and resonance frequency and Q value are almost constant, and two times of improved efficiencies; Adopt series system, equivalent volume and efficiency reduce by half, but equivalent volume is little of being with logical case valuable, and have advantages of push-pull type counteracting even-order harmonic.Therefore, adopting serial or parallel connection mode is according to the parameter of loud speaker, whether to reach cabinet design to require to decide.
In the present embodiment, the opening direction of two loud speakers 130 is relative, is that two loud speaker 130 polarity are with being connected.Loud speaker 130 phase places are identical, amplitude is identical due to two, thereby strengthened radiation effect, and efficiency doubles, and is applicable to full frequency band speaker system.
In the present embodiment, the port wall of each phase-reversing tube 140 is all bent to form rib 141 to port outside, like this, prevents that air-flow sudden change in chamber 111 from causing that wind makes an uproar.
In the present embodiment, phase-reversing tube in each chamber 111 140 setting positions are different, and phase-reversing tube 140 is located on casing 100 sidewalls of each chamber 111 correspondences or on the baffle plate of each chamber 111 correspondences.During practical application, can carry out as required flexible design.
It should be noted that, in the present embodiment, casing 100 adopts the good material seals of shockproof properties such as plasticine or the shockproof cotton of EVA; Each baffle plate requires firm, good seal performance, guarantees that each chamber 111 is air tight, and with the vibration of loud speaker 130, does not resonate; Meanwhile, phase-reversing tube 140 also requires firm solid, and when loud speaker 130 drives, phase-reversing tube 140 also can not produce mechanical oscillation; For connecting the connection wire (not shown) of two-loudspeaker 130, also adopt packing to be fixed in audio amplifier, prevent that resonance from producing noise; The cover plate of casing 100 adopts screw pole to be locked, and prevents cover plate vibration.
With reference to Fig. 5, in the present embodiment, loud speaker 130 is subject to signal source and drives rear generation to vibrate, and pushes four air generation vibrations in chamber 111, thereby makes four air in phase-reversing tube 140 do piston vibration, and outside radiative acoustic wave.Loud speaker 130 forms two high pass circuits and two low pass circuits with chamber 111, phase-reversing tube 140, therefore forms eight rank band-pass responses.
As seen from Figure 7, the logical case frequency response range of eight rank bands is 65-300Hz, and passband inner curve tendency is substantially steady, and ripple is less.As seen from Figure 8, in the impedance curve of the logical case of eight rank bands, there are 4 crests and 3 troughs, embody the cooperation of each chamber 111 and phase-reversing tube 140, thus the acoustical quality that can obtain.
Embodiment bis-
With reference to Fig. 6, it is the second embodiment schematic diagram of eight rank audio amplifiers provided by the invention.The difference of the present embodiment and the first embodiment is only, the opening direction of two loud speakers 130 in the present embodiment is identical, form a kind of push-pull type eight rank band-pass speakers, it is the anti-phase connection of loud speaker 130 polarity, its equivalent parameters changes with the first embodiment and approaches, and because the direction of motion of two loudspeaker of synchronization is contrary, therefore can offset the asymmetry of vibrational system, magnetic circuit, offset the even-order harmonic distortion of loudspeaker, thereby for being with logical case effective.
The present invention also provides a kind of television set (not shown), particularly a kind of liquid crystal TV set, and it comprises liquid crystal display screen main body, also comprises eight above-mentioned rank band-pass speakers.Described liquid crystal display screen main body back is provided with a hanger that can be hung on metope, and eight above-mentioned rank band-pass speakers are built in described hanger.Because eight above-mentioned rank band-pass speakers are thinner, therefore can be arranged in hanger, like this, do not take the inner space of LCD TV, and be not subject to the thickness of liquid crystal display screen own restriction, affect.When eight above-mentioned rank band-pass speakers are applied to television set, by the frequency dividing circuit of TV set circuit part, the frequency range of audio amplifier can be controlled at below 300Hz, eliminate the sound leakage that audio amplifier itself causes because the problems such as sealing are installed, guarantee that the tonequality of low frequency is pure, clear.Like this, effectively improve the problem of liquid crystal TV set low frequency differences.
It should be noted that, when liquid crystal TV set is the base support arranging by liquid crystal display screen bottom part body, eight above-mentioned rank band-pass speakers are built in described base, reach and are placed in acoustical quality equal in hanger, and not taking equally the inner space of liquid crystal display screen.
These are only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a rank band-pass speaker, comprise the casing with cavity, it is characterized in that: in described cavity, be provided with three and described cavity can be divided into the baffle plate of four chambers, wherein on two baffle plates, be respectively equipped with a loud speaker, in described four chambers, be equipped with a phase-reversing tube; Described three baffle plates comprise the first baffle plate, the second baffle be arrangeding in parallel and the 3rd baffle plate intersecting vertically with described the first baffle plate and second baffle, and described two loud speakers are located at respectively on described the first baffle plate and second baffle; Described casing adopts plasticine or the shockproof minuteness envelope of EVA.
2. a kind of eight rank band-pass speakers as claimed in claim 1, is characterized in that: described two loud speakers are located at respectively the first baffle plate position corresponding with second baffle, and adopt serial or parallel connection mode to connect between two loud speakers.
3. a kind of eight rank band-pass speakers as claimed in claim 2, is characterized in that: the opening direction of described two loud speakers is relative.
4. a kind of eight rank band-pass speakers as claimed in claim 1, is characterized in that: the opening direction of described two loud speakers is identical.
5. a kind of eight rank band-pass speakers as described in any one in claim 1 to 4, is characterized in that: described in each, the port wall of phase-reversing tube is all bent to form rib to port outside.
6. a kind of eight rank band-pass speakers as claimed in claim 1, is characterized in that: on the baffle plate that described in each, phase-reversing tube is located on the wall box that each chamber is corresponding or each chamber is corresponding.
7. a television set, comprises liquid crystal display screen main body, it is characterized in that: also comprise eight rank band-pass speakers as described in any one in claim 1 to 6.
8. television set as claimed in claim 7, is characterized in that: described liquid crystal display screen main body back is provided with a hanger that can be hung on metope, and described eight rank band-pass speakers are built in described hanger.
9. television set as claimed in claim 7, is characterized in that: the bottom of described liquid crystal display screen main body is provided with a base, and described eight rank band-pass speakers are built in described base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210042439.1A CN102630066B (en) | 2012-02-23 | 2012-02-23 | Eight-order band-pass speaker box and television |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210042439.1A CN102630066B (en) | 2012-02-23 | 2012-02-23 | Eight-order band-pass speaker box and television |
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| CN102630066A CN102630066A (en) | 2012-08-08 |
| CN102630066B true CN102630066B (en) | 2014-10-08 |
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| CN201210042439.1A Active CN102630066B (en) | 2012-02-23 | 2012-02-23 | Eight-order band-pass speaker box and television |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103945299A (en) * | 2014-03-21 | 2014-07-23 | 山东共达电声股份有限公司 | Miniature loudspeaker system and electronic equipment |
| TWI602441B (en) * | 2016-07-11 | 2017-10-11 | 宏碁股份有限公司 | Speaker with harmonic sound and electronic device using the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5092424A (en) * | 1990-12-03 | 1992-03-03 | Bose Corporation | Electroacoustical transducing with at least three cascaded subchambers |
| CN2590309Y (en) * | 2002-11-06 | 2003-12-03 | 王捷 | Thin-type sound box system for large-screen panel display |
| CN200973167Y (en) * | 2006-10-13 | 2007-11-07 | 周坤养 | Loudspeaker completed with flat TV. |
| CN201365331Y (en) * | 2009-01-19 | 2009-12-16 | 嘉兴天音电子有限公司 | Built-in speaker bass sound box |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11155187A (en) * | 1997-11-21 | 1999-06-08 | Matsushita Electric Ind Co Ltd | Loudspeaker system |
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2012
- 2012-02-23 CN CN201210042439.1A patent/CN102630066B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5092424A (en) * | 1990-12-03 | 1992-03-03 | Bose Corporation | Electroacoustical transducing with at least three cascaded subchambers |
| CN2590309Y (en) * | 2002-11-06 | 2003-12-03 | 王捷 | Thin-type sound box system for large-screen panel display |
| CN200973167Y (en) * | 2006-10-13 | 2007-11-07 | 周坤养 | Loudspeaker completed with flat TV. |
| CN201365331Y (en) * | 2009-01-19 | 2009-12-16 | 嘉兴天音电子有限公司 | Built-in speaker bass sound box |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平11－155187A 1999.06.08 |
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