CN102630066A - Eight-order band-pass speaker box and television - Google Patents
Eight-order band-pass speaker box and television Download PDFInfo
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- CN102630066A CN102630066A CN2012100424391A CN201210042439A CN102630066A CN 102630066 A CN102630066 A CN 102630066A CN 2012100424391 A CN2012100424391 A CN 2012100424391A CN 201210042439 A CN201210042439 A CN 201210042439A CN 102630066 A CN102630066 A CN 102630066A
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- 238000010586 diagram Methods 0.000 description 5
- 230000004044 response Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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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 invention relates to a sound box, in particular to an eight-order band-pass sound box and a television adopting the sound box.
Background
At present, the built-in sound box applied to the television is more commonly an inverter box or a closed box. These inverter boxes or enclosures are limited by the space inside the television, are generally small, and with the widespread use of flat-panel televisions, these inverter boxes or enclosures are required to be thinner and thinner, so that the thickness of the speaker inside the cabinet is affected, the stroke becomes smaller, and the low-frequency effect is poor.
In order to improve the audio effect of the sound box, some eight-order band-pass sound boxes are also adopted in the prior art to replace the sound boxes. The conventional eight-step bandpass sound box is generally based on two structural principles as shown in fig. 1 and fig. 2. Both structures are composed of a cabinet 100 ', two baffles 200', a loudspeaker 300 'and three inverter tubes 400'. The diaphragm of the speaker 300 ' is driven to vibrate and vibrate air by coupling with air in the cabinet 100 ', the air in the cabinet 100 ' is coupled with the inverter tube 400 ' and radiates sound waves to the space, and the inverter tube 400 ' located at different positions emits different sound waves. Thus, by virtue of the acoustic mass of the three inverter tubes 400 'and the acoustic compliance of the three chambers formed by the separation of the two baffles 200', three Helmholtz reflection tuning frequencies are formed, thus forming an eighth order bandpass box. Referring to fig. 3 and fig. 4, the acoustic equivalent circuit of the two eight-step band pass speakers is shown. Wherein,
eg-acoustic pressure source;
rg-signal source internal resistance;
re-speaker DC resistance;
csp — the acoustic mass (including air load) of the speaker unit vibration system;
rmsp — acoustic resistance of speaker unit vibration system loss;
lsp-the acoustic compliance of the loudspeaker unit vibration system;
c alpha is the equivalent acoustic mass of the inverter tube alpha;
Lv-V cavity equivalent acoustic compliance;
c beta-inverter tube beta equivalent acoustic mass;
Lu-U cavity equivalent acoustic compliance;
c gamma-phase inverter tube gamma equivalent acoustic mass;
Lw-W cavity equivalent acoustic compliance;
it can be seen from the above equivalent circuit that Lu and ca, Lw and cy form a second-order low-pass respectively, and cbp and Lv, and Csp and Lsp form a second-order high-pass respectively, so that the structure can form an eighth-order band-pass, so that the energy is totally concentrated in the effective bandwidth, and the sound production efficiency of the speaker and the cabinet is greatly improved.
Although the eight-order band-pass manufactured based on the above principle has a certain tone quality effect, the sound boxes of the eight-order band-pass have a loudspeaker, so that the loudspeaker occupies a large space, and the sound boxes cannot be made to be very thin, so that the application of the eight-order band-pass is further limited along with the development of the lightness and thinness of the television.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an eight-order band-pass sound box with simple structure, good tone quality effect and thin thickness and a television adopting the eight-order band-pass sound box.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides an eight-step band-pass speaker, including the box that has the cavity, be provided with three baffle that can divide the cavity into four cavities in the cavity, wherein be equipped with a speaker on two baffles respectively, all be equipped with an inverted tube in four cavities.
Specifically, the three baffles include a first baffle, a second baffle and a third baffle, wherein the first baffle, the second baffle and the third baffle are arranged in parallel, the third baffle is vertically intersected with the first baffle and the second baffle, and the two loudspeakers are respectively arranged on the first baffle and the second baffle.
Furthermore, the two loudspeakers are respectively arranged at the positions corresponding to the first baffle and the second baffle, and the two loudspeakers are connected in series or in parallel.
Further, the opening directions of the two speakers are opposite.
Alternatively, the opening directions of the two speakers are the same.
Furthermore, the port wall of each inverter tube is bent towards the outside of the port to form a flange.
Furthermore, each inverter tube is arranged on the side wall of the box body corresponding to each chamber or on the baffle corresponding to each chamber.
The invention also provides a television, which comprises a liquid crystal display main body and the eight-order band-pass sound box.
Specifically, the liquid crystal display main part back is equipped with one and can hangs it in the stores pylon of wall, place in the eight-step band-pass audio amplifier in the stores pylon.
Or, the bottom of the liquid crystal display main body is provided with a base, and the eight-order band-pass sound box is arranged in the base.
In the invention, the cavity of the box body is divided into four chambers by the three baffles, each chamber is provided with an inverter tube, and two of the baffles are respectively provided with a loudspeaker, so that the effect of one big loudspeaker can be achieved by using two small loudspeakers, the appearance of the sound box is ultrathin and ultra-narrow, the low-frequency sound effect is outstanding, and the problem that the small loudspeakers cannot emit low frequency is solved; the sound box is applied to the television, not only the whole appearance of the ultrathin flat television is not damaged, but also the acoustic characteristic of the television is greatly improved.
Drawings
Fig. 1 is a schematic structural diagram of a conventional eight-step speaker;
FIG. 2 is a schematic view of another structure of an existing eight-step speaker;
FIG. 3 is an acoustic equivalent circuit diagram of the eighth-order speaker shown in FIG. 1;
FIG. 4 is an acoustic equivalent circuit diagram of the eighth-order speaker shown in FIG. 2;
FIG. 5 is a schematic view of a first embodiment of an eighth-order speaker provided in the present invention;
FIG. 6 is a schematic view of a second embodiment of the eighth-order speaker provided in the present invention;
FIG. 7 is a graph of the audio frequency response of the eighth-order speaker of the present invention;
fig. 8 is an impedance curve diagram of the eighth-order speaker provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides an eight-order band-pass sound box and a television, wherein the eight-order band-pass sound box adopts three baffles to divide a cavity of a box body into four chambers, each chamber is provided with an inverter tube, and two baffles are respectively provided with a loudspeaker, so that the effect of one big loudspeaker can be achieved by using two small loudspeakers, the sound box is ultra-thin and ultra-narrow in appearance, the low-frequency sound effect is prominent, and the problem that the small loudspeakers cannot emit low frequency is solved; the sound box is applied to the television, not only the whole appearance of the ultrathin flat television is not damaged, but also the acoustic characteristic of the television is greatly improved.
It should be noted that, according to the idea that two small speakers are used to replace one large speaker to achieve the above technical effects in this embodiment, when more speakers are used in combination with different baffles and different inverter tubes, an eighth-order bandpass sound box can also be formed. The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Example one
Referring to fig. 5, a schematic structural diagram of the eight-order bandpass sound box provided by the present invention is shown. The eight-stage loudspeaker box comprises a box body 100 with a cavity 110, and three baffles which can divide the cavity 110 into four chambers 111 are arranged in the cavity 110. The three baffles include a first baffle 120, a second baffle 121, and a third baffle 123 perpendicularly intersecting the first baffle 120 and the second baffle 121, wherein the first baffle 120 and the second baffle 121 are disposed in parallel, and a speaker 130 is disposed on each of the first baffle 120 and the second baffle 121. An inverter tube 140 is provided in each chamber 111. In the invention, three baffles are adopted to divide the cavity of the box body 100 into four chambers 111, each chamber 111 is provided with an inverter tube, and two baffles are respectively provided with a loudspeaker 130, thus, the effect of one big loudspeaker can be achieved by using two small loudspeakers 130, the appearance of the sound box is ultrathin and ultra-narrow, the low-frequency sound effect is outstanding, and the problem that the small loudspeakers cannot emit low frequency is solved.
It should be noted that, in the present invention, the arrangement layout of the three baffles is not limited to the above form, as long as the three baffles separate the cavity into four chambers, wherein the two baffles are both provided with speakers, and each chamber is provided with an inverter tube, the requirements of the eight-step band-pass speaker can be met, and both the ultra-thin speaker and the good low frequency sound effect can be obtained, which is within the protection scope of the present invention.
Further, in the present embodiment, the two speakers 130 are respectively disposed at the corresponding positions of the first baffle 120 and the second baffle 121, which is favorable for the internal layout of the sound box; meanwhile, the two speakers 130 are correspondingly located at the center positions of the first baffle 120 and the second baffle 121, so that the baffles are balanced, and noise caused by vibration generated by unbalance of the baffles when the speakers 130 work is avoided. Of course, the speaker 130 may be provided at other positions of each baffle. The two speakers 130 are connected in series or in parallel. Whether connected in series or parallel, is for the total impedance to match the circuit. The parallel connection mode is adopted, the equivalent volume is increased by two times compared with a single loudspeaker, the resonance frequency and the Q value are almost unchanged, and the efficiency is improved by two times; the series connection mode is adopted, the equivalent volume and the efficiency are halved, but the equivalent volume is small, so that the band-pass box is valuable, and the push-pull type band-pass box has the advantage of offsetting even harmonics. Therefore, the serial or parallel connection mode is determined according to whether the parameters of the loudspeaker meet the design requirements of the cabinet.
In this embodiment, the openings of the two speakers 130 are in opposite directions, i.e., the two speakers 130 are connected in phase with each other. Because the two loudspeakers 130 have the same phase and the same amplitude, the radiation effect is enhanced, the efficiency is doubled, and the loudspeaker system is suitable for a full-band loudspeaker system.
In this embodiment, the port wall of each inverter tube 140 is bent outward to form a rib 141, so as to prevent wind noise caused by sudden changes in the airflow in the chamber 111.
In this embodiment, the inverter tubes 140 are disposed at different positions in each chamber 111, and the inverter tubes 140 are disposed on the side wall of the box 100 corresponding to each chamber 111 or on the baffle corresponding to each chamber 111. In practical application, the design can be flexibly carried out according to the requirement.
In this embodiment, the box body 100 is sealed by using materials with good shock resistance, such as plasticine or EVA shockproof cotton; each baffle is required to be firm and have good sealing performance, so that each chamber 111 is ensured to be airtight and does not resonate along with the vibration of the loudspeaker 130; meanwhile, the inverter tube 140 is also required to be strong and solid, and the inverter tube 140 cannot generate mechanical vibration when the speaker 130 is driven; connecting wires (not shown) for connecting the two speakers 130 are also fixed in the sound box by adopting shockproof materials to prevent noise caused by resonance; the cover plate of the box body 100 is locked and fixed by screw posts, so that the cover plate is prevented from vibrating.
Referring to fig. 5, in the present embodiment, the speaker 130 is driven by the signal source to vibrate and squeeze the air in the four chambers 111 to vibrate, so that the air in the four inverter tubes 140 piston-vibrates and radiates sound waves outwards. Speaker 130 forms two high-pass circuits and two low-pass circuits with chamber 111 and inverter 140, thus forming an eighth-order bandpass response.
As can be seen from FIG. 7, the frequency response range of the octave bandpass box is 65-300Hz, the curve trend in the passband is basically smooth, and the ripple is small. As can be seen from fig. 8, the impedance curve of the eighth-order bandpass box has 4 peaks and 3 troughs, which shows the coordination between each chamber 111 and the inverter tube 140, so as to obtain good sound quality.
Example two
Referring to fig. 6, a schematic view of a second embodiment of the eighth-order speaker provided in the present invention is shown. The difference between this embodiment and the first embodiment is that the opening directions of the two speakers 130 in this embodiment are the same, and a push-pull type eighth-order bandpass sound box is formed, that is, the speakers 130 are connected in opposite polarity, the equivalent parameter variation is close to that in the first embodiment, and the moving directions of the two speakers are opposite at the same time, so that the asymmetry of the vibration system and the magnetic circuit can be cancelled, the even harmonic distortion of the speakers can be cancelled, and the effect of using the bandpass box is good.
The invention also provides a television (not shown in the figure), in particular to a liquid crystal television, which comprises a liquid crystal display main body and the eight-order band-pass sound box. The liquid crystal display main part back is equipped with one and can hangs its stores pylon in the wall, places in foretell eight-step band-pass speaker in the stores pylon. The eight-order band-pass sound box is thin, so the eight-order band-pass sound box can be arranged in the hanging frame, and therefore the eight-order band-pass sound box does not occupy the internal space of the liquid crystal television and is not limited and influenced by the thickness of the liquid crystal screen. When the eight-order band-pass sound box is applied to a television, the frequency width of the sound box can be controlled below 300Hz through the frequency dividing circuit of the television circuit part, sound leakage caused by problems of installation sealing and the like of the sound box is eliminated, and pure and clear low-frequency tone quality is guaranteed. Therefore, the problem of low frequency difference of the liquid crystal television is effectively solved.
It should be noted that, when the lcd tv is supported by the base disposed at the bottom of the lcd main body, the eight-step band-pass speaker is disposed in the base, so as to achieve the same tone quality effect as that of the rack, and also does not occupy the inner space of the lcd.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an eight steps band-pass audio amplifier, is including the box that has the cavity, its characterized in that: the loudspeaker is characterized in that three baffles capable of dividing the cavity into four chambers are arranged in the cavity, wherein two baffles are respectively provided with a loudspeaker, and phase reversal pipes are arranged in the four chambers.
2. The eighth-order bandpass sound box according to claim 1, wherein: the three baffles comprise a first baffle, a second baffle and a third baffle, wherein the first baffle and the second baffle are arranged in parallel, the third baffle is vertically crossed with the first baffle and the second baffle, and the two loudspeakers are respectively arranged on the first baffle and the second baffle.
3. An eight-order bandpass loudspeaker according to claim 2, wherein: the two loudspeakers are respectively arranged at the corresponding positions of the first baffle and the second baffle and are connected in series or in parallel.
4. An eight-order bandpass loudspeaker according to claim 3, wherein: the opening directions of the two loudspeakers are opposite.
5. An eight-order bandpass loudspeaker according to claim 2, wherein: the opening directions of the two loudspeakers are the same.
6. An eight-order bandpass loudspeaker according to any one of claims 1 to 5, wherein: the port wall of each phase inversion tube is bent towards the outer side of the port to form a flange.
7. The eighth-order bandpass sound box according to claim 1, wherein: each inverter tube is arranged on the side wall of the box body corresponding to each chamber or on the baffle corresponding to each chamber.
8. A television comprises a liquid crystal screen main body and is characterized in that: further comprising an eighth order bandpass enclosure as claimed in any one of claims 1 to 7.
9. The television set of claim 8, wherein: the liquid crystal display main part back is equipped with one and can hangs its stores pylon in the wall, place in the eight-step band-pass speaker in the stores pylon.
10. The television set of claim 8, wherein: the bottom of LCD screen main part is equipped with a base, place in the eight-step band-pass speaker in the base.
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| 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 true CN102630066A (en) | 2012-08-08 |
| CN102630066B 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107613436A (en) * | 2016-07-11 | 2018-01-19 | 宏碁股份有限公司 | Loudspeaker with overtone and electronic device using same |
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|---|---|---|---|---|
| US5092424A (en) * | 1990-12-03 | 1992-03-03 | Bose Corporation | Electroacoustical transducing with at least three cascaded subchambers |
| JPH11155187A (en) * | 1997-11-21 | 1999-06-08 | Matsushita Electric Ind Co Ltd | Loudspeaker system |
| 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 |
-
2012
- 2012-02-23 CN CN201210042439.1A patent/CN102630066B/en active Active
Patent Citations (5)
| 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 |
| JPH11155187A (en) * | 1997-11-21 | 1999-06-08 | Matsushita Electric Ind Co Ltd | Loudspeaker system |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107613436A (en) * | 2016-07-11 | 2018-01-19 | 宏碁股份有限公司 | Loudspeaker with overtone and electronic device using same |
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| Publication number | Publication date |
|---|---|
| CN102630066B (en) | 2014-10-08 |
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