JPS62115996A - Speaker - Google Patents
SpeakerInfo
- Publication number
- JPS62115996A JPS62115996A JP25473485A JP25473485A JPS62115996A JP S62115996 A JPS62115996 A JP S62115996A JP 25473485 A JP25473485 A JP 25473485A JP 25473485 A JP25473485 A JP 25473485A JP S62115996 A JPS62115996 A JP S62115996A
- Authority
- JP
- Japan
- Prior art keywords
- voice coil
- pitched tone
- low
- pass filter
- oscillator
- 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.)
- Pending
Links
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、薄形平面スピーカに関するものであり、特に
、撮動板または搗動膜などの振動体に、全面一様にボイ
スコイルを配設した薄形平面スピーカに関するものであ
る。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a thin flat speaker, and in particular to a vibrating body such as a moving plate or a percussion membrane, in which a voice coil is uniformly disposed over the entire surface. This invention relates to a thin flat speaker.
従来のスピーカは、いわゆる「ガム−ジン型スビーカ」
とよばれ、特公昭35−10420号公報に記載される
ように、薄膜の振動板に全面一様に分布するボイスコイ
ルを貼りつけ、そのボイスコイルを該ボイスコイルの形
状に応じた磁気回路中に置くことによって、撮動板を全
面一様に駆動するものであった。Conventional speakers are so-called "Gum-Zin type speakers."
As described in Japanese Patent Publication No. 35-10420, a voice coil distributed uniformly over the entire surface is attached to a thin film diaphragm, and the voice coil is inserted into a magnetic circuit according to the shape of the voice coil. By placing the camera on the ground, the imaging plate was driven uniformly over the entire surface.
しかし、再生周波数の下限に応じて一定の搗動板面積が
必要となる一方、全面均一駆動であるが故に、高音域で
は指向性が劣化するという欠点を有していた。However, while a certain area of the percussion plate is required depending on the lower limit of the reproduction frequency, the directivity deteriorates in the high frequency range because the drive is uniform over the entire surface.
本発明は前述の欠点を除去するためになされたものであ
り、その目的は、一枚の振動体において全帯域を再生し
、高音域再生時も指向性の劣化しない、薄型平面スピー
カーを提供することにある。The present invention was made in order to eliminate the above-mentioned drawbacks, and its purpose is to provide a thin flat speaker that reproduces the entire frequency range in a single vibrating body and does not deteriorate its directivity even when reproducing high frequencies. There is a particular thing.
前記の目的を達成するために、本発明は低音に対しては
振動板全体が一様に駆動されるようにし、高音に対して
は振動板の一部小面積のみが駆動されるようにして、高
音再生時の指向性を改善した点に特徴がある。In order to achieve the above object, the present invention is configured such that the entire diaphragm is driven uniformly for low sounds, and only a small area of the diaphragm is driven for high sounds. , is characterized by improved directivity during high-frequency sound reproduction.
以下に、図面を参照して、本発明の詳細な説明する。N
wc1図は本発明の一実施例の断面図である。図におい
て、振動体1はたとえば膜状または板状の樹脂フィルム
からなり、その片面もしくは両面に複数および/または
複層のボイスコイル2が4電薄膜および箔をエツチング
して形成されている。The present invention will be described in detail below with reference to the drawings. N
Figure wc1 is a sectional view of an embodiment of the present invention. In the figure, a vibrating body 1 is made of, for example, a film-like or plate-like resin film, and a plurality of and/or multilayer voice coils 2 are formed on one or both sides of the vibrating body 1 by etching a quadrielectric thin film and foil.
柱状の磁石3は磁気回路を形成するヨークプレート4に
略等間隔にかつ交互に反対極性となるように取付けられ
、各磁石間のヨークプレート4にに音波の放射孔5が形
成されている。フレーム6は上記振動体1の周縁部上下
を挾持する。そして、このフレーム6には、磁石3が同
極性同士対向するように向い合せて、上記ヨークプレー
ト4の周辺部を取付けている。The columnar magnets 3 are attached to a yoke plate 4 forming a magnetic circuit at approximately equal intervals and alternately with opposite polarity, and sound wave radiation holes 5 are formed in the yoke plate 4 between each magnet. The frame 6 holds the upper and lower peripheral edges of the vibrating body 1. The periphery of the yoke plate 4 is attached to the frame 6 with the magnets 3 facing each other with the same polarity.
i2図はボイスコイルとそれに付随する分割ネットワー
クの結線図であり、本実施例はボイスコイル2を低音用
ボイスコイル21と高音用ボイスコイル22とに完全に
独立させ、高音用ボイスコイル22を振動体1の中央付
近にのみ形成したものである。そして、低音用ボイスコ
イル21には分割ネットワーク9のローパスフィルタ1
゜が接続され、高音用ボイスコイル22には分割ネット
ワーク9のバイパスフィルタ11と減衰器12が接続さ
れている。Figure i2 is a wiring diagram of the voice coil and its associated divided network. In this embodiment, the voice coil 2 is completely independent of the bass voice coil 21 and the treble voice coil 22, and the treble voice coil 22 is vibrated. It is formed only near the center of the body 1. The low-pass filter 1 of the dividing network 9 is connected to the bass voice coil 21.
The bypass filter 11 and attenuator 12 of the division network 9 are connected to the treble voice coil 22.
つぎに、動作について説明する。音楽信号が印加された
とき、低音成分はローパスフィルタ10によって低音用
ボイスコイル21を流れる九め伝動体1のほとんど全部
(符号イで示す領域)が音波放射面として動作する。Next, the operation will be explained. When a music signal is applied, the bass component flows through the bass voice coil 21 through the low-pass filter 10, and almost the entirety of the nine-tone transmission body 1 (the region indicated by the symbol A) operates as a sound wave radiation surface.
一方、高音成分はバイパスフィルタ11によって高音用
ボイスコイル22を流れるため、振動体1の中央付近(
符号口で示す領域)のみが音波放射面として動作する。On the other hand, the high-pitched sound component flows through the high-pitched voice coil 22 by the bypass filter 11, so near the center of the vibrating body 1 (
Only the region (indicated by the symbol) acts as a sound wave emitting surface.
したがって、高音信号に対しては実効的振動面積が低音
信号に比べて小となり、全帯域にわたって振動体を均一
に駆動した場合より高音再生時の指向性が改善される。Therefore, the effective vibration area for high frequency signals is smaller than that for low frequency signals, and the directivity during high frequency reproduction is improved compared to when the vibrating body is driven uniformly over the entire band.
第5図はボイスコイルと分割ネットワークの結線図の他
の実施例を示すものであり、本実施例は、復数個のボイ
スコイル23〜26および分割ネットワーク9のローパ
スフィルタ10を順次直列に接続して、そのすべてを低
發用として使用し、そのうちのボイスコイル24.25
に分割ネットワーク9のバイパスフィルタ11と減衰器
12およびインピーダンス調整用抵抗器13を接続して
該ボイスコイル24.25を高音用として使用したもの
である。FIG. 5 shows another embodiment of the connection diagram between the voice coil and the divided network, and in this embodiment, several voice coils 23 to 26 and the low-pass filter 10 of the divided network 9 are connected in series. All of them are used for low power, of which the voice coil 24.25
The bypass filter 11 of the divided network 9, the attenuator 12, and the impedance adjusting resistor 13 are connected to the voice coils 24 and 25 for use in high-pitched sounds.
つぎに本実施例の動作を説明する。音楽信号が印加され
たとき、低音成分はローパスフィルタ10を介して、ボ
イスコイル23.24.25.26のすべてを流れるた
め、振動体1はそのほとんど全面(符号ハで示す領域)
が音波放射面として動作する。Next, the operation of this embodiment will be explained. When a music signal is applied, the bass component flows through all of the voice coils 23, 24, 25, and 26 via the low-pass filter 10, so that the vibrating body 1 is transmitted almost over its entire surface (the area indicated by C).
acts as a sound wave emitting surface.
一方、高音成分はバイパスフィルタ11を介して、ボイ
スコイル24.25のみを流れるため、振動体1はその
中央付近(符号二で示す領域)のみが音波放射面として
動作する。したがって、前記実施例1と同じく高音再生
時の指向性が改善される。On the other hand, since the high-frequency sound component flows only through the voice coils 24 and 25 via the bypass filter 11, only the vicinity of the center of the vibrating body 1 (the area indicated by reference numeral 2) operates as a sound wave radiation surface. Therefore, as in the first embodiment, the directivity during high frequency reproduction is improved.
以上の説明により明らかなように、本発明によれば、低
音に対しては振動体全体が一様に駆動されるようにし、
高音に対しては振動体の−部の小面積のみが駆動される
ように構成したので、一枚の振動体で全帯域を再生でき
、かつ、高音再生時の良好な指向特性を持つ薄形平面ス
ピーカが得られるという効果が達成される。As is clear from the above explanation, according to the present invention, the entire vibrating body is uniformly driven for low frequencies;
For high-pitched sounds, only a small area of the negative part of the vibrating body is driven, so a single vibrating body can reproduce the entire band, and it is a thin structure with good directivity when reproducing high-pitched sounds. The effect of obtaining a planar loudspeaker is achieved.
第1図は本発明の薄形平面スピーカの横断面図、第2図
は本発明の第1実施例を示すボイスコイルおよび分割ネ
ットワークなどの結線図、第5図は本発明の第2実施例
を示す結線図である0
1・・・振動体
2.21〜26・・・ボイスコイル
5・・・柱状磁石 4・・・ヨークプレート5・
・・音波放射孔 6・・・フレーム9・・・分割ネ
ットワーク
10・・・ローパスフィルタ
11・・・バイパスフィルタ
12・・・減衰器
弔1 図
第3記FIG. 1 is a cross-sectional view of a thin flat speaker according to the present invention, FIG. 2 is a connection diagram of a voice coil, a dividing network, etc. showing a first embodiment of the present invention, and FIG. 5 is a second embodiment of the present invention. 1... Vibrating body 2. 21-26... Voice coil 5... Column magnet 4... Yoke plate 5.
...Sound wave radiation hole 6...Frame 9...Division network 10...Low pass filter 11...Bypass filter 12...Attenuator 1 Figure 3
Claims (5)
体と、上記ボイスコイルに交差して直流磁束を作用させ
る磁気回路を具備した薄形平面スピーカにおいて、低音
に対しては上記振動体全体が一様に駆動され高音に対し
ては該振動体の一部分のみが駆動されるように、上記ボ
イスコイルを帯域別に分けて分割ネツトワークを接続し
たことを特徴とする薄形平面スピーカ(1) In a thin flat speaker equipped with a flat vibrating body with voice coils arranged uniformly over the entire surface, and a magnetic circuit that applies DC magnetic flux across the voice coil, the vibration described above for bass sounds A thin flat speaker characterized in that the voice coil is divided into bands and connected to a divided network so that the entire body is driven uniformly and only a part of the vibrating body is driven for high-pitched sounds.
体に設けたことを特徴とする前記特許請求の範囲第(1
)項記載の薄形平面スピーカ。(2) Claim No. 1 (1) characterized in that a low-pitched voice coil and a high-pitched voice coil are provided on a vibrating body.
) Thin planar speaker described in section 2.
として用いることを特徴とする前記特許請求の範囲第(
1)項記載の薄形平面スピーカ。(3) A part of the bass voice coil is used as a treble voice coil.
The thin flat speaker described in item 1).
ることを特徴とする前記特許請求の範囲第(1)項記載
の薄形平面スピーカ。(4) The thin planar speaker according to claim (1), characterized in that only the central portion of the vibrating body is driven for high-pitched sounds.
フイルタとからなることを特徴とする前記特許請求の範
囲第(1)項記載の薄形平面スピーカ。(5) The thin planar speaker as set forth in claim (1), wherein the divided network comprises a low-pass filter and a high-pass filter.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25473485A JPS62115996A (en) | 1985-11-15 | 1985-11-15 | Speaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25473485A JPS62115996A (en) | 1985-11-15 | 1985-11-15 | Speaker |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS62115996A true JPS62115996A (en) | 1987-05-27 |
Family
ID=17269114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP25473485A Pending JPS62115996A (en) | 1985-11-15 | 1985-11-15 | Speaker |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62115996A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000078095A1 (en) * | 1999-06-11 | 2000-12-21 | Fps Inc. | Flat acoustic transducer |
US7020301B2 (en) | 2001-11-05 | 2006-03-28 | Matsushita Electric Industrial Co., Ltd. | Loudspeaker |
JP2008113195A (en) * | 2006-10-30 | 2008-05-15 | Mitsubishi Electric Engineering Co Ltd | Speaker system |
JP2011151599A (en) * | 2010-01-21 | 2011-08-04 | Foster Electric Co Ltd | Low profile multiway speaker |
JP2012100233A (en) * | 2010-10-06 | 2012-05-24 | Toa Corp | Thin double-sided speaker |
-
1985
- 1985-11-15 JP JP25473485A patent/JPS62115996A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000078095A1 (en) * | 1999-06-11 | 2000-12-21 | Fps Inc. | Flat acoustic transducer |
KR100522384B1 (en) * | 1999-06-11 | 2005-10-19 | 에프피에스 인코포레이티드 | Flat acoustic transducer |
US7174024B1 (en) | 1999-06-11 | 2007-02-06 | Fps, Inc. | Flat acoustic conversion device |
US7020301B2 (en) | 2001-11-05 | 2006-03-28 | Matsushita Electric Industrial Co., Ltd. | Loudspeaker |
JP2008113195A (en) * | 2006-10-30 | 2008-05-15 | Mitsubishi Electric Engineering Co Ltd | Speaker system |
JP2011151599A (en) * | 2010-01-21 | 2011-08-04 | Foster Electric Co Ltd | Low profile multiway speaker |
JP2012100233A (en) * | 2010-10-06 | 2012-05-24 | Toa Corp | Thin double-sided speaker |
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