JPS622867Y2 - - Google Patents
Info
- Publication number
- JPS622867Y2 JPS622867Y2 JP13449878U JP13449878U JPS622867Y2 JP S622867 Y2 JPS622867 Y2 JP S622867Y2 JP 13449878 U JP13449878 U JP 13449878U JP 13449878 U JP13449878 U JP 13449878U JP S622867 Y2 JPS622867 Y2 JP S622867Y2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- sound pressure
- flat
- planar
- frequency characteristics
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000005855 radiation Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035936 sexual power Effects 0.000 description 1
Landscapes
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Description
【考案の詳細な説明】
本考案は平面振動板を用いた高音用平面型スピ
ーカの改良に関する。[Detailed Description of the Invention] The present invention relates to an improvement of a high-pitched flat speaker using a flat diaphragm.
従来のこの種平面型スピーカは、平面振動板の
重量が大きいので、所望の感度を得るには磁気回
路を大きくしなければならないがコスト高となる
おそれがあつた。又、平面振動板のボイスコイル
駆動部からみて、内側と外側とに共振が発生する
ので、音圧及び歪特性が劣化する。更に、平面型
スピーカが高音用である場合、使用波長が平面振
動板の寸法に近ずくと、該振動板の近傍で位相干
渉を起して音圧周波数特性を悪化させていた。 In conventional planar speakers of this type, the weight of the planar diaphragm is large, so in order to obtain the desired sensitivity, the magnetic circuit must be made large, which may lead to high costs. Furthermore, since resonance occurs on the inside and outside when viewed from the voice coil driving section of the plane diaphragm, sound pressure and distortion characteristics deteriorate. Furthermore, when a flat speaker is used for high-pitched sounds, when the wavelength used approaches the dimensions of the flat diaphragm, phase interference occurs near the diaphragm, deteriorating the sound pressure frequency characteristics.
そこで、先に本出願人は平面振動板の前面に離
間してホーン形状の放射路を複数個設けた平面型
スピーカを考案し出願して従来例の欠点を解決し
充分な効果を得ることに成功したのである。 Therefore, the present applicant first devised and applied for a planar speaker in which a plurality of horn-shaped radiation paths were provided spaced apart on the front surface of a planar diaphragm, thereby solving the drawbacks of the conventional example and obtaining sufficient effects. It was successful.
しかし、本考案は上記の考案を更に改良して、
平面型スピーカの音圧周波数特性や音圧感度の向
上を目的としたものである。 However, the present invention further improves the above invention,
The purpose is to improve the sound pressure frequency characteristics and sound pressure sensitivity of flat speakers.
以下、本考案を図示の実施例によつて詳記する
と、図において、１はアルミハニカム等の平面振
動板で、２はボイスコイル、３はダンパー、４は
ダンパー台である。５は磁気回路で、マグネツト
６と、ポール７、プレート８により構成されてい
る。 The present invention will be described in detail below with reference to the illustrated embodiments. In the figures, 1 is a flat diaphragm made of aluminum honeycomb or the like, 2 is a voice coil, 3 is a damper, and 4 is a damper stand. Reference numeral 5 denotes a magnetic circuit, which is composed of a magnet 6, a pole 7, and a plate 8.
上記の平面振動板１の前面には、忠実な直方体
であるイコライザ本体９を配在するが、該平面振
動板１とイコライザ本体９との間にはスペーサ１
０を介在して、両者１と９を離間している。そし
て、イコライザ本体９には、平面振動板１側が小
径なホーン形状の放射路１１を複数個設ける。
尚、この際、中央部に配置した放射路１１のテー
パ傾斜面を周囲の放射路のそれよりゆるく形成し
ている。又、イコライザ本体９の中心部には、円
筒形状の貫通穴１２を形成すると共に、該穴１２
にグラスウールや発泡ウレタン等の透気性のある
音響抵抗材１３を充填する。そこで、ボイスコイ
ル２により駆動された平面振動板１からの発生音
は、放射路１１がホーン形状なので、音響放射抵
抗が増大し、マツチングがとれて能率が向上し、
音圧感度が上昇する。又、放射路１１の入口の配
置を適当に選定することによつて、高域限界での
ピークが抑制された音圧周波数特性が平担になる
と共に、貫通路１２及び音響抵抗材１３も同じ効
果を発揮する。更に、平面振動板１とイコライザ
本体９との間隔を適当に選定して平面振動板１に
抵抗を付与することにより、高域共振のＱを低く
することができる。以上のようなことから、第４
図の従来例の平面型スピーカのみによる場合の音
圧周波数特性と比較して、第５図の本考案に係る
平面型スピーカの音圧周波数特性では、特に高域
が平担となり、又、指向性も向上したことが判明
したのである。 The equalizer body 9, which is a faithful rectangular parallelepiped, is disposed on the front surface of the flat diaphragm 1, but a spacer 1 is provided between the flat diaphragm 1 and the equalizer body 9.
Both 1 and 9 are separated by 0. The equalizer main body 9 is provided with a plurality of horn-shaped radiation paths 11 having a small diameter on the plane diaphragm 1 side.
At this time, the tapered slope of the radiation path 11 disposed in the center is formed to be gentler than that of the surrounding radiation paths. Further, a cylindrical through hole 12 is formed in the center of the equalizer body 9, and the hole 12
is filled with an air-permeable acoustic resistance material 13 such as glass wool or urethane foam. Therefore, since the radiation path 11 of the sound generated from the plane diaphragm 1 driven by the voice coil 2 is horn-shaped, the acoustic radiation resistance increases, matching is achieved, and efficiency is improved.
Sound pressure sensitivity increases. In addition, by appropriately selecting the arrangement of the entrance of the radiation path 11, the sound pressure frequency characteristics with suppressed peaks at the high frequency limit can be flattened, and the through path 12 and the acoustic resistance material 13 can also be be effective. Furthermore, by appropriately selecting the distance between the planar diaphragm 1 and the equalizer body 9 to provide resistance to the planar diaphragm 1, the Q of high-frequency resonance can be lowered. From the above, the fourth
Compared to the sound pressure frequency characteristics when using only the conventional planar speaker shown in the figure, the sound pressure frequency characteristics of the planar speaker according to the present invention shown in FIG. It was found that sexual performance also improved.
第１図は本考案に係る平面型スピーカで、第２
図は第１図の−線断面図、第３図は要部の斜
視図、第４図は従来例の、第５図は本考案の夫々
音圧周波数特性を示す。
１……平面振動板、２……ボイスコイル、５…
…磁気回路、９……イコライザ本体、１０……ス
ペーサ、１１……放射路、１２……貫通路、１３
……音響抵抗材。
Figure 1 shows a flat speaker according to the present invention, and the second
The figures are a sectional view taken along the line -- in Fig. 1, Fig. 3 is a perspective view of the main parts, Fig. 4 shows the sound pressure frequency characteristics of the conventional example, and Fig. 5 shows the sound pressure frequency characteristics of the present invention. 1...Plane diaphragm, 2...Voice coil, 5...
... Magnetic circuit, 9 ... Equalizer body, 10 ... Spacer, 11 ... Radiation path, 12 ... Penetration path, 13
...Acoustic resistance material.
Claims (1)
の中心部に円筒形状の貫通穴を設けて、その貫通
穴に音響抵抗材を充填したイコライザを、平面振
動板の前面に離間して配設した平面型スピーカ。 A flat surface having a plurality of horn-shaped radiation paths, a cylindrical through hole in the center, and an equalizer with an acoustic resistance material filled in the through hole, spaced apart from each other in front of a flat diaphragm. model speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13449878U JPS622867Y2 (en) | 1978-09-30 | 1978-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13449878U JPS622867Y2 (en) | 1978-09-30 | 1978-09-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5551544U JPS5551544U (en) | 1980-04-04 |
| JPS622867Y2 true JPS622867Y2 (en) | 1987-01-22 |
Family
ID=29103936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13449878U Expired JPS622867Y2 (en) | 1978-09-30 | 1978-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS622867Y2 (en) |
-
1978
- 1978-09-30 JP JP13449878U patent/JPS622867Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5551544U (en) | 1980-04-04 |
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