CN203039890U - Annular phase plug of backward radiation type compression drive - Google Patents
Annular phase plug of backward radiation type compression drive Download PDFInfo
- Publication number
- CN203039890U CN203039890U CN 201220714843 CN201220714843U CN203039890U CN 203039890 U CN203039890 U CN 203039890U CN 201220714843 CN201220714843 CN 201220714843 CN 201220714843 U CN201220714843 U CN 201220714843U CN 203039890 U CN203039890 U CN 203039890U
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- phase plug
- plug
- phase
- cavity
- pin
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- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
The utility model relates to an annular phase plug of a backward radiation type compression drive. A loudspeaker casing, a second phase plug and a third phase plug are inverse-fan-shaped cavities. Pin holes are respectively arranged on the fan-shaped cavities. A first phase plug is a cone, wherein the bottom of the cone is a cambered surface. A blind hole is arranged on the surface of the cone. The third phase plug is placed in a cavity of the loudspeaker casing. The second phase plug is placed in a cavity of the third phase plug. The first phase plug is placed in a cavity of the second phase plug. One end of a pin passes through the pin holes of the loudspeaker casing, the second phase plug and the third phase plug in turn to be placed in the blind hole of the first phase plug, wherein the end of the pin tightly fits the blind hole. Gaps are arranged between the loudspeaker casing and the third phase plug, between the third phase plug and the second phase plug, and between the second phase plug and the first phase plug. The annular phase plug of the backward radiation type compression drive is characterized in that modal excitation and noise in a cavity between a diaphragm and the phase plug are avoided; flat intermediate frequency and high sensitivity are acquired; interference effect, resonance and standing waves are eliminated; and high-order and low-order harmonics are suppressed.
Description
Technical field
The utility model relates to a kind of strong sound broadcast system field, particularly a kind of annular phase plug of backward radiation formula compressed drive.
Background technology
The acoustic transmission channel of the phase plug of traditional backward radiation medium-high frequency compressed drive is conical design.Such defective one easily forms standing wave and high low-order harmonic at the incident end of sound wave in the cavity between the transmitting terminal of sound wave.Its two, easily make the cavity between vibrating diaphragm and the phase plug be prone to the mode excitation effect.Its three, easily form resonance at the incident end of sound wave to the cavity between the transmitting terminal of sound wave.
Summary of the invention
In view of the deficiency that prior art exists, the utility model provides a kind of can improve sensitivity, reduce the mode excitation, avoid producing standing wave and resonance, reduce the annular phase plug of the backward radiation formula compressed drive of the acoustical energy losses of sound wave in transmission channel.
The utility model for achieving the above object, the technical scheme that adopts is: a kind of annular phase plug of backward radiation formula compressed drive, comprise speaker housings, it is characterized in that: also comprise first phase plug, second phase plug, third phase position plug, pin, described speaker housings, second phase plug, third phase position plug are down fan-shaped cavity, are respectively equipped with pin-and-hole at fan-shaped cavity; Described first phase plug is the cone that the bottom surface is cambered surface, is provided with blind hole in circular cone dignity; Described third phase position plugs in the cavity of speaker housings, described second phase plug places in the cavity of third phase position plug, described first phase plug places in the cavity of second phase plug, one end of described pin, the pin-and-hole that passes speaker housings, third phase position plug, second phase plug successively places the blind hole tight fit of first phase plug, between speaker housings and the third phase position plug, between third phase position plug and second phase plug, be equipped with the slit between second phase plug and first phase plug.
Characteristics of the present utility model are: according to wave equation three annular input gap positions and area are chosen, can be avoided the excitation of the mode in the cavity and noise appearance between vibrating diaphragm and the phase plug, and then obtain straight intermediate frequency and higher sensitivity.The diversion Design of acoustic transmission channel can make phase place unanimity, elimination interference effect and the resonance of sound wave from each input channel to output.The exponential type form is adopted in the design of acoustic transmission channel area, can eliminate the standing wave in the transmission channel, suppresses high low-order harmonic.The exponential type growth pattern is adopted in the design of acoustic transmission channel area, can obtain better acoustic impedance like this, and then obtain higher acoustic-electric conversion efficiency.
Description of drawings
Fig. 1 is the utility model front view.
Fig. 2 digs view for the utility model.
Fig. 3 is the utility model mansion view.
Embodiment
As shown in Figure 1, 2, 3, a kind of annular phase plug of backward radiation formula compressed drive, comprise speaker housings 4, also comprise first phase plug 1, second phase plug 2, third phase position plug 3, pin 5, speaker housings 4, second phase plug 2, third phase position plug 3 are down fan-shaped cavity, are respectively equipped with pin-and-hole at fan-shaped cavity; First phase plug 1 is provided with blind hole for the bottom surface is the cone of cambered surface in circular cone dignity; Third phase position plug 3 places in the cavity of speaker housings 4, second phase plug 2 places in the cavity of third phase position plug 3, first phase plug 1 places in the cavity of second phase plug 2, one end of pin 5, the pin-and-hole that passes speaker housings 4, third phase position plug 3, second phase plug 2 successively places the blind hole tight fit of first phase plug 1, between speaker housings 4 and the third phase position plug 3, between plug 3 and second phase plug 2 of third phase position, be equipped with slit 6 between second phase plug 2 and first phase plug 1.
The design feature of acoustic transmission channel is that the sound wave input of each transmission channel equates to the distance of sound wave output.Three annular input slits 6 equate that to the distance of aditus laryngis 9 design can make the phase place unanimity at the sound wave arrival aditus laryngis place of different passages, the influence of elimination sound wave interference like this.The area of each transmission channel is that exponential type increases design.
What the transmission channel area of three annular input seam 6 arrival aditus laryngis 9 adopted is the exponential type growth pattern.Design can obtain better acoustic impedance like this, and then obtains higher acoustic-electric conversion efficiency.
The position in three annular input slits 6 and the design of area can be eliminated the excitation of the mode in the cavity between vibrating diaphragm and the phase plug, avoid noise to occur, and then obtain straight intermediate frequency and higher sensitivity.
Claims (1)
1. the annular phase plug of a backward radiation formula compressed drive, comprise speaker housings (4), it is characterized in that: also comprise first phase plug (1), second phase plug (2), third phase position plug (3), pin (5), described speaker housings (4), second phase plug (2), third phase position plug (3) are down fan-shaped cavity, are respectively equipped with pin-and-hole at fan-shaped cavity; Described first phase plug (1) is provided with blind hole for the bottom surface is the cone of cambered surface in circular cone dignity; Described third phase position plug (3) places in the cavity of speaker housings (4), described second phase plug (2) places in the cavity of third phase position plug (3), described first phase plug (1) places in the cavity of second phase plug (2), one end of described pin (5), pass speaker housings (4) successively, third phase position plug (3), the pin-and-hole of second phase plug (2) places the blind hole tight fit of first phase plug (1), between speaker housings (4) and the third phase position plug (3), between third phase position plug (3) and second phase plug (2), be equipped with slit (6) between second phase plug (2) and first phase plug (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220714843 CN203039890U (en) | 2012-12-23 | 2012-12-23 | Annular phase plug of backward radiation type compression drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220714843 CN203039890U (en) | 2012-12-23 | 2012-12-23 | Annular phase plug of backward radiation type compression drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203039890U true CN203039890U (en) | 2013-07-03 |
Family
ID=48691974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220714843 Expired - Fee Related CN203039890U (en) | 2012-12-23 | 2012-12-23 | Annular phase plug of backward radiation type compression drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203039890U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109889960A (en) * | 2017-12-06 | 2019-06-14 | 惠州迪芬尼声学科技股份有限公司 | It combined type phase plug and its applies in compressed drive and loudspeaker |
| CN110856058A (en) * | 2019-11-28 | 2020-02-28 | 歌尔股份有限公司 | Loudspeaker and electronic equipment with same |
-
2012
- 2012-12-23 CN CN 201220714843 patent/CN203039890U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109889960A (en) * | 2017-12-06 | 2019-06-14 | 惠州迪芬尼声学科技股份有限公司 | It combined type phase plug and its applies in compressed drive and loudspeaker |
| CN110856058A (en) * | 2019-11-28 | 2020-02-28 | 歌尔股份有限公司 | Loudspeaker and electronic equipment with same |
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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 |
Granted publication date: 20130703 Termination date: 20151223 |
|
| EXPY | Termination of patent right or utility model |