CN100576948C - Phase inverted cabinet - Google Patents
Phase inverted cabinet Download PDFInfo
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- CN100576948C CN100576948C CN200410012569A CN200410012569A CN100576948C CN 100576948 C CN100576948 C CN 100576948C CN 200410012569 A CN200410012569 A CN 200410012569A CN 200410012569 A CN200410012569 A CN 200410012569A CN 100576948 C CN100576948 C CN 100576948C
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- phase
- reversing tube
- casing
- fixed
- inverted cabinet
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Abstract
The present invention is a kind of phase inverted cabinet.It comprises sound box, is fixed in loud speaker and phase-reversing tube on the casing, has the hole on phase-reversing tube.Further, the two ends of phase-reversing tube are all fixed with horn mouth structure and casing.Perhaps the other end of phase-reversing tube is fixing by cushion pad and casing sealing.The casing internal fixation has that a plurality of two ends and casing are fixed, the phase-reversing tube of perforate on it.Have continuous helicla flute at the phase-reversing tube inwall.On the horn-like exit surface of phase-reversing tube, be stained with the point-like projection that forms by damping glue.Phase inverted cabinet of the present invention is by architecture advances, compares with existing phase inverted cabinet having under the essentially identical effect, simplifies the structure, reduced cost, simplified manufacture craft.Simultaneously, the tonequality of audio amplifier is improved to a certain extent.
Description
Technical field
The present invention relates to audio amplifier, be specially a kind of phase inverted cabinet.
Background technology
Phase inverted cabinet comprises sound box, is fixed in loud speaker and phase-reversing tube on the casing.The sound wave that loud speaker sends to cabinets cavity sends to the casing place after the phase-reversing tube paraphase, and the sound wave of special frequency channel is strengthened.The paraphase frequency is relevant with the length and the sectional dimension of phase-reversing tube.
Phase-reversing tube in the existing phase inverted cabinet all is a cantilever type, and promptly phase-reversing tube has only an end and casing to fix; And phase-reversing tube has only both ends open, and after the length of phase-reversing tube and sectional dimension were determined, it can only carry out paraphase to a certain definite frequency range sound wave; To carry out paraphase to the sound wave of a plurality of frequency ranges, in casing, a plurality of phase-reversing tubes will be set, make loudspeaker box structure complexity, cost up.
Existing phase inverted cabinet produces the casing vibration, influence tonequality for avoiding, and in sound box baroque supporting construction will be set, to avoid or casing when reducing audio amplifier and working vibrates.Supporting construction makes loudspeaker box structure further complicated, and cost further increases.
Audio amplifier is when big acoustic pressure, and the interior wall friction that sound wave air-flow and phase-reversing tube are smooth can produce airflow noise.Carry out airflow noise when avoiding big acoustic pressure, adopt the phase-reversing tube of variable cross-section at interval, the i.e. pipeline section that the compartment of terrain has sectional dimension to increase on the phase-reversing tube in the existing phase inverted cabinet; Pit or radial groove perhaps are set on the horn-like exit surface of phase-reversing tube, eliminate or airflow noise when weakening big acoustic pressure with this.The phase-reversing tube of this interval variable cross-section and pit or radial groove are set on the horn-like exit surface of phase-reversing tube, it is complicated that it adds technology.
Summary of the invention
The present invention is directed to above-mentioned defective and problem that existing phase inverted cabinet structurally exists, a kind of improved phase inverted cabinet is provided.
The present invention adopts following technical scheme to realize: phase inverted cabinet, and comprise sound box, be fixed in loud speaker and phase-reversing tube on the casing, on phase-reversing tube, have the hole.Sound wave respectively from the hole and the phase-reversing tube port enter phase-reversing tube the pipe range difference of phase-reversing tube because the two-way sound wave is flowed through, hole and phase-reversing tube port can carry out paraphase to the sound wave of two different frequency ranges to be selected, promptly phase-reversing tube is realized the sound wave paraphase to two different frequency ranges.Under the situation that does not increase phase-reversing tube, widened the paraphase band limits of phase-reversing tube.Simplify loudspeaker box structure, improved the tonequality of audio amplifier.Hole institute open position difference on the phase-reversing tube, the paraphase frequency range of its selection is difference to some extent.Hole on the phase-reversing tube also can be made into Zhi Guanzhuan, and effect is identical.
The two ends of phase-reversing tube are all fixed with horn mouth structure and casing.The cantilever end that is about to existing cantilever type phase-reversing tube is fixed with fixed structure identical with the other end and casing.The sound wave that hole from phase-reversing tube enters is to the shunting of phase-reversing tube two ends, because the hole is different to the distance at phase-reversing tube two ends, so can be to the sound wave paraphase of two different frequency ranges.The band limits of the determining positions paraphase in hole.This further improvement to the phase-reversing tube structure not only can realize the two-band paraphase, increase the paraphase band limits, and because the phase-reversing tube two ends are all fixed with casing, itself casing be played a supporting role, and can avoid the audio amplifier vibration.
The casing internal fixation has that a plurality of two ends and casing are fixed, the phase-reversing tube of perforate on it.Not only can increase the paraphase band limits more fully, and the support effect in the casing is better, need not to be provided with specially in casing supporting construction again.Make phase-reversing tube have double action.Help simplifying loudspeaker box structure.
Have continuous helicla flute at the phase-reversing tube inwall.Airflow noise when reducing big acoustic pressure with this.Inwall has the easier processing of phase-reversing tube of the more existing interval of spiral fluted phase-reversing tube variable cross-section, but can play the effect that reduces airflow noise equally.
On the horn-like exit surface of phase-reversing tube, be stained with the point-like projection (or continuous, discontinuous strip projected parts) that forms by damping glue.Further reduce the generation of airflow noise with this.Spraying damping glue point-like projection is more existing to be provided with pit or radial groove to add technology simpler on the horn-like exit surface of phase-reversing tube, easier realization is to simplify the manufacture craft of audio amplifier.Described damping glue is existing known products, on the market or specialized factory on sale.
Phase inverted cabinet of the present invention is by architecture advances, compares with existing phase inverted cabinet having under the essentially identical effect, simplifies the structure, reduced cost, simplified manufacture craft.Simultaneously, the tonequality of audio amplifier improves to a certain extent and improves.
Description of drawings
Fig. 1 is the structural representation of phase inverted cabinet of the present invention;
Fig. 2 is second kind of further structural representation of the present invention;
Fig. 3 is the third further structural representation of the present invention;
Fig. 4 is the 4th kind of further structural representation of the present invention;
Fig. 5 is a phase-reversing tube internal structure schematic diagram;
Embodiment
Embodiment 1 (seeing accompanying drawing 1)
Phase inverted cabinet comprises sound box 1, is fixed in loud speaker 2 and phase-reversing tube 3 on the casing, has hole 4 on phase-reversing tube 3.Hole 4 also can be made into Zhi Guanzhuan.
Have continuous helicla flute 5 at the phase-reversing tube inwall.
On the horn-like exit surface of phase-reversing tube, be stained with the point-like projection 6 that forms by damping glue.
Embodiment 2 (seeing accompanying drawing 2)
Phase inverted cabinet comprises sound box 1, is fixed in loud speaker 2 and phase-reversing tube 3 on the casing, has hole 4 on phase-reversing tube 3.The two ends of phase-reversing tube 3 are all fixed with horn mouth structure and casing.
Have continuous helicla flute 5 at the phase-reversing tube inwall.
On the horn-like exit surface of phase-reversing tube, be stained with the point-like projection 6 that forms by damping glue.
Embodiment 3 (seeing accompanying drawing 3)
Phase inverted cabinet comprises sound box 1, is fixed in loud speaker 2 and phase-reversing tube 3 on the casing, has hole 4 on phase-reversing tube 3.The other end of phase-reversing tube 3 is fixing with the casing sealing by cushion pad 7 (as rubber blanket).Cushion pad and casing are fixed (cementation or other fixed form), and the other end of phase-reversing tube is fixed (endoporus on the cushion pad is inserted in cementation or sealing) again with cushion pad.Present embodiment with implement 2 and compare, though lost the effect of dual paraphase frequency range,, be connected and fixed high resilience between phase-reversing tube and casing because an end fixes by cushion pad and casing, more help the vibration damping of casing.Simultaneously, the closed inner chamber of phase-reversing tube one side forms the helmholtz resonance chamber, can absorb or weaken the standing wave in the casing, to improving audio amplifier tonequality certain effect is arranged.
Cementation has buffer gasket 10 (as rubber ring) on the inner wall edge of the phase-reversing tube of sound box outlet, is fixed with locating ring 11, locating ring 11 and buffer gasket 10 fixing (cementation or screw) on the outer wall of the flared end of phase-reversing tube.The flared end of phase-reversing tube can further reduce the vibration of phase-reversing tube and casing by the elastic buffer effect of the fixed structure and the buffer gasket of buffer gasket and locating ring.
Have continuous helicla flute 5 at phase-reversing tube (opposite side) inwall.
On the horn-like exit surface of phase-reversing tube (opposite side), be stained with the point-like projection 6 that forms by damping glue.
Phase inverted cabinet comprises sound box 1, is fixed in loud speaker 2 and phase-reversing tube 3 on the casing, has hole 4 on phase-reversing tube 3.The casing internal fixation has that a plurality of two ends and casing are fixed, the phase-reversing tube of perforate on it (can be that two ends are all fixed with horn mouth structure and casing, also can be the other end passes through cushion pad 7 fixing as rubber blanket and casing sealing).This execution mode can further be strengthened the support effect of box house, increases the paraphase band limits simultaneously more fully.
Each phase-reversing tube inwall has continuous helicla flute 5.
Be stained with the point-like projection 6 that forms by damping glue on the horn-like exit surface of each phase-reversing tube.
Between phase-reversing tube, be provided with the damping block 8 that two ends are connected and fixed by Flexible Connector (as rubber band) and phase-reversing tube.Flexible Connector and damping block are used to absorb or consume the interior standing wave of casing, and it is unbalanced to reduce the interior acoustic pressure of casing, are beneficial to the operate as normal of loud speaker, reduce the vibration of casing simultaneously.
In phase-reversing tube external stability damping sheet 9 is arranged.Produce vibration under the standing wave effect of damping sheet in casing, can absorb or consume the standing wave in the casing further.
The structure of Flexible Connector, damping block and damping sheet also is applicable in the embodiment 1 described execution mode.Promptly in embodiment 1, can be provided with the cantilever phase-reversing tube of a plurality of perforates on it, damping sheet and damping block are set on each phase-reversing tube and between the phase-reversing tube.
Claims (3)
1, a kind of phase inverted cabinet, comprise sound box (1), be fixed in loud speaker (2) and phase-reversing tube (3) on the casing, on phase-reversing tube (3), have hole (4), it is characterized by: the casing internal fixation has that a plurality of two ends and casing are fixed, the phase-reversing tube of perforate on it, between phase-reversing tube, be provided with the damping block (8) that two ends are connected and fixed by Flexible Connector and phase-reversing tube, damping sheet (9) arranged in phase-reversing tube external stability.
2, phase inverted cabinet as claimed in claim 1 is characterized by: have continuous helicla flute (5) at the phase-reversing tube inwall.
3, phase inverted cabinet as claimed in claim 1 is characterized by: be stained with the point-like projection (6) that is formed by damping glue on the horn-like exit surface of phase-reversing tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410012569A CN100576948C (en) | 2004-09-30 | 2004-09-30 | Phase inverted cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410012569A CN100576948C (en) | 2004-09-30 | 2004-09-30 | Phase inverted cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1602115A CN1602115A (en) | 2005-03-30 |
| CN100576948C true CN100576948C (en) | 2009-12-30 |
Family
ID=34662878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200410012569A Expired - Fee Related CN100576948C (en) | 2004-09-30 | 2004-09-30 | Phase inverted cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100576948C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105516838B (en) * | 2016-01-05 | 2018-09-18 | 灵感创作室有限公司 | A kind of disresonance body structure and speaker for electroacoustic device |
| CN110809206A (en) * | 2019-09-27 | 2020-02-18 | 深圳市火乐科技发展有限公司 | Phase inversion type sound box and micro projector |
-
2004
- 2004-09-30 CN CN200410012569A patent/CN100576948C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 倒相音箱理想状态的设计研究. 张维国.青岛大学学报（工程技术版），第11卷第3期. 1996 |
| 倒相音箱理想状态的设计研究. 张维国.青岛大学学报(工程技术版)，第11卷第3期. 1996 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1602115A (en) | 2005-03-30 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: ZHONGSHAN LEETAC ELECTRONICS CO., LTD. Assignor: Taiyuan Normal College Contract record no.: 2010440001212 Denomination of invention: Reflex speaker Granted publication date: 20091230 License type: Exclusive License Open date: 20050330 Record date: 20100819 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091230 Termination date: 20120930 |