JPS61139191A - Plane speaker - Google Patents
Plane speakerInfo
- Publication number
- JPS61139191A JPS61139191A JP26237484A JP26237484A JPS61139191A JP S61139191 A JPS61139191 A JP S61139191A JP 26237484 A JP26237484 A JP 26237484A JP 26237484 A JP26237484 A JP 26237484A JP S61139191 A JPS61139191 A JP S61139191A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- plane
- center
- voice coil
- core member
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/041—Centering
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、各種音響機器に利用される平面スピーカに関
するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a flat speaker used in various types of audio equipment.
従来の技術
従来の平面スピーカは、第4図に示すように、センター
ボール(1)を有するプレート(2)にリング状のマグ
ネット(3)と同じくリング状のプレート(4)とを積
層し結合して構成した磁気回路(5)上にフレーム(6
)を結合し、このフレーム(6)の周縁部にガスケット
(7)とともにフリーエツジなどのエツジ(8)を取付
け、このエツジ(8)に平面振動板(9)の周縁部を結
合し、この平面振動板(9)の下面にドライブコーン(
10)を結合し、このドライブコーン(10)の中央部
に前記磁気回路(5)の磁気ギャップ(11)にはまり
込むボイスコイル(12)を結合し。Prior Art As shown in Fig. 4, a conventional flat speaker consists of a plate (2) having a center ball (1), a ring-shaped magnet (3), and a ring-shaped plate (4) stacked together. A frame (6) is placed on the magnetic circuit (5) configured by
), attach an edge (8) such as a free edge together with a gasket (7) to the peripheral edge of this frame (6), connect the peripheral edge of a flat diaphragm (9) to this edge (8), and Drive cone (
10), and a voice coil (12) that fits into the magnetic gap (11) of the magnetic circuit (5) is connected to the center of the drive cone (10).
このボイスコイル(12)をダンパー(13)で保持し
て構成されていた。This voice coil (12) was held by a damper (13).
発明が解決しようとする問題点
このような従来の平面スピーカは、平面振動板(9)の
第1次の共振モードの節の位置を駆動することにより第
2次の共振まで帯域拡大を行なっていたが、平面振動板
(9)の中心部が分割共振等の異常共振を起していたた
め、音圧周波数特性に悪影響を与え、高音域に著しいピ
ーク及びディップを生じさせていた。この従来の平面ス
ピーカの音圧周波数特性を第5図に実線(a)で、また
第2次ひずみを実線(C)で示している。Problems to be Solved by the Invention In such conventional planar speakers, the band is expanded to the second resonance by driving the node position of the first resonance mode of the plane diaphragm (9). However, the center of the flat diaphragm (9) was experiencing abnormal resonance such as split resonance, which adversely affected the sound pressure frequency characteristics and caused significant peaks and dips in the high frequency range. The sound pressure frequency characteristics of this conventional flat speaker are shown in FIG. 5 by a solid line (a), and the second-order distortion is shown by a solid line (C).
平面振動板のスキン材及びドライブコーンとして、内部
損失の高い、比較的柔らかい材質を使用した平面スピー
カの音圧周波数特性を第5@に一点鎖線(b)で示し、
また第2次ひずみを破線(d)で示す。この構成では、
高音域のピークは除去されているものの、高音域全体の
音圧レベルの低下や、第2次ひずみの著しい増加等の問
題があった。The sound pressure frequency characteristics of a flat speaker using a relatively soft material with high internal loss as the skin material and drive cone of the flat diaphragm are shown in No. 5 by the dashed line (b),
Further, the second-order strain is shown by a broken line (d). In this configuration,
Although the peak in the treble range has been removed, there are problems such as a decrease in the sound pressure level of the entire treble range and a significant increase in second-order distortion.
また、平面振動板の中心部を切除し、内部損失の大きい
異質材を充填する構造もあるが、この構成では、外観品
位の低下、平面振動板の製造工程における工数増加によ
るコストアップ、平面振動板の中心部の面剛性低下に基
因する高域再生周波数帯域の低下などの問題があった。There is also a structure in which the central part of the plane diaphragm is cut out and filled with a different material that has a large internal loss, but this structure reduces the appearance quality, increases the cost due to the increase in man-hours in the manufacturing process of the plane diaphragm, and prevents plane vibrations. There were problems such as a decrease in the high frequency reproduction frequency band due to a decrease in surface rigidity at the center of the plate.
本発明は上記問題を解消した平面スピーカを提供するこ
とを目的とする。An object of the present invention is to provide a flat speaker that solves the above problems.
問題を解決するための手段
上記問題を解決するため、本発明の平面スピーカは、中
心部に円形の切断溝を形成したコア材の両面にスキン材
を貼着して成る平面振動板と、磁気@路に結合されたフ
レームと、このフレームの周縁部と前記平面振動板の周
縁部とを結合するエツジと、前記コア材の切断溝が形成
する円と略同一外径を有しかつ前記平面振動板に結合さ
れかつ前記磁気回路の磁気ギャップに嵌合するボイスコ
イルとを備えた構成としたものである。Means for Solving the Problems In order to solve the above problems, the flat speaker of the present invention includes a flat diaphragm made by pasting skin materials on both sides of a core material with a circular cut groove formed in the center, and a magnetic a frame coupled to the groove, an edge connecting the peripheral edge of the frame and the peripheral edge of the planar diaphragm, and an edge having substantially the same outer diameter as a circle formed by the cut groove of the core material and the flat surface; The voice coil is coupled to the diaphragm and fitted into the magnetic gap of the magnetic circuit.
実施例
以下1本発明の一実施例を第1図〜第3図に基づいて説
明する。Embodiment One embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
第2図は本発明の一実施例における平面スピーカの断面
図で、第4図に示す構成要素と同一の構成要素には同一
の符号を付してその説明を省略する。第2plにおいて
、 (14)は平面振動板で、この平面振動板(14)
は、第1[ilに示すように、ハニカム構造のコア材(
14a)の中心部(14b)を抜き型を用いて一度切断
し、その後切断されたコア材(14a)の中心部(14
b)を元の位置にはめ込み、このコア材(14a)にア
ルミスキン材(14e) (14d)を上下に貼着する
ことによって構成されている。また(15)はボイスコ
イルで、平面振動板(14)の中心部(14b)の切断
径と略等しい外径を有しており、平面振動板(9)にウ
レタン系接着剤で貼着されている。FIG. 2 is a cross-sectional view of a flat speaker according to an embodiment of the present invention, and the same components as those shown in FIG. 4 are given the same reference numerals and their explanations will be omitted. In the second pl, (14) is a plane diaphragm, and this plane diaphragm (14)
As shown in the first [il], the honeycomb structure core material (
The center part (14b) of the core material (14a) is cut once using a cutting die, and then the center part (14b) of the cut core material (14a) is cut.
b) is inserted into the original position, and aluminum skin materials (14e) (14d) are attached to the top and bottom of this core material (14a). Further, (15) is a voice coil, which has an outer diameter approximately equal to the cut diameter of the center part (14b) of the flat diaphragm (14), and is attached to the flat diaphragm (9) with urethane adhesive. ing.
平面振動板(14)の中心部(14b)の切断径および
ボイスコイル(15)の外径1°法は、平面振動板(1
4)の外径′または外径寸法に対して15%から35%
の範囲であるとき著しい効果があった。これは平面振動
板(14)の中心部(14b)を切断することによって
。The cutting diameter of the center part (14b) of the plane diaphragm (14) and the outer diameter of the voice coil (15) are 1°.
4) 15% to 35% of the outside diameter' or outside diameter dimension
There was a significant effect when the amount was within the range of . This is done by cutting the center part (14b) of the flat diaphragm (14).
音軸の中心部付近に適度なコンプライアンスが与えられ
ることになり、このコンプライアンスが高音域での中心
部の異常共振を打ち消す逆共振を起こすためである。ま
た中心部に平面振動板(14)の重量とコア材(14a
)の中心部(14b)のみの重量とが存在することにな
り、平面スピーカの平面振動板(14)の振幅に対して
損失を与えており、この部分の分割振動が抑制されるこ
とになる。さらに切断部と略同−径のボイスコイル(I
5)で中心部を駆動することにより、中心部の振動ロス
を小さくし、歪みを抑えることができる。This is because an appropriate amount of compliance is given near the center of the sound axis, and this compliance causes reverse resonance that cancels out the abnormal resonance at the center in the high frequency range. In addition, the weight of the flat diaphragm (14) and the core material (14a) are placed in the center.
), which causes a loss in the amplitude of the flat diaphragm (14) of the flat speaker, and the split vibration of this part is suppressed. . In addition, a voice coil (I) with approximately the same diameter as the cutting part
By driving the center part in step 5), vibration loss in the center part can be reduced and distortion can be suppressed.
この平面スピーカの音圧周波数特性及び第2次歪みを第
3図に示す、第5図に示した従来の平面スピーカと比較
して、高音域のピークは著しくダウンしており、高音域
全体の音圧レベルはダウンしておらず、びずみも少なく
平坦な周波数特性になっている。The sound pressure frequency characteristics and second-order distortion of this flat speaker are shown in Figure 3.Compared to the conventional flat speaker shown in Figure 5, the peak in the treble range is significantly lower, and the overall treble range is The sound pressure level has not decreased, and the frequency response is flat with little distortion.
発明の効果
以上述べたごとく本発明によれば、簡易な構成で、平面
スピーカの再生帯域を落とすことなく、また歪みを増や
すことなく、平面スピーカの高音域のピークを除去する
ことができ、音圧周波数特性を平坦にすることが可能で
あり、また外観品位を劣化させることもなく、その工業
的利用価値は極めて大である。Effects of the Invention As described above, according to the present invention, the high frequency peak of a flat speaker can be removed with a simple configuration without lowering the reproduction band of the flat speaker or increasing distortion, thereby improving the sound quality. It is possible to flatten the pressure frequency characteristics, and the appearance quality does not deteriorate, so its industrial utility value is extremely large.
第1図は本発明の一実施例における平面スピーカの平面
振動板の分解斜視図、第2図は同平面スピーカの断面図
、第3図は同平面スピーカの音圧周波数特性及び第2次
歪みを示す特性説明図、第4図は従来の平面スピーカの
断面図、第5図は従来の平面スピーカの音圧周波数特性
及び第2次歪みを示す特性説明図である。
(5)・・・磁気回路、(6)・・・ フレーム、(8
)・−・エツジ、(11)・・・磁気ギャップ、(14
)・・・平面振動板、(14a)・・・コア材、(14
b)・・・中心部、(14c) (14d)・・・アル
ミスキン材
代理人 森 本 義 弘
第1図
第2図FIG. 1 is an exploded perspective view of a flat diaphragm of a flat speaker according to an embodiment of the present invention, FIG. 2 is a sectional view of the flat speaker, and FIG. 3 is a sound pressure frequency characteristic and second-order distortion of the flat speaker. FIG. 4 is a sectional view of a conventional flat speaker, and FIG. 5 is a characteristic diagram showing sound pressure frequency characteristics and second-order distortion of the conventional flat speaker. (5)... Magnetic circuit, (6)... Frame, (8
)...Edge, (11)...Magnetic gap, (14
)...Plane diaphragm, (14a)...Core material, (14
b)...Central part, (14c) (14d)...Aluminum skin material agent Yoshihiro MorimotoFigure 1Figure 2
Claims (1)
キン材を貼着して成る平面振動板と、磁気回路に結合さ
れたフレームと、このフレームの周縁部と前記平面振動
板の周縁部とを結合するエッジと、前記コア材の切断溝
が形成する円と略同一外径を有しかつ前記平面振動板に
結合されかつ前記磁気回路の磁気ギャップに嵌合するボ
イスコイルとを備えた平面スピーカ。1. A planar diaphragm made of a core material with a circular cut groove formed in the center and skin materials attached to both sides, a frame coupled to a magnetic circuit, and a peripheral portion of this frame and the planar diaphragm. a voice coil that has approximately the same outer diameter as the circle formed by the cut groove of the core material, is coupled to the planar diaphragm, and fits into the magnetic gap of the magnetic circuit; Equipped with a flat speaker.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26237484A JPS61139191A (en) | 1984-12-11 | 1984-12-11 | Plane speaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26237484A JPS61139191A (en) | 1984-12-11 | 1984-12-11 | Plane speaker |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61139191A true JPS61139191A (en) | 1986-06-26 |
Family
ID=17374860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP26237484A Pending JPS61139191A (en) | 1984-12-11 | 1984-12-11 | Plane speaker |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61139191A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015033970A1 (en) * | 2013-09-09 | 2015-03-12 | NAKAISHI Shinichirou | Speaker for supporting hearing-impaired people |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5734775B2 (en) * | 1974-11-18 | 1982-07-24 |
-
1984
- 1984-12-11 JP JP26237484A patent/JPS61139191A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5734775B2 (en) * | 1974-11-18 | 1982-07-24 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015033970A1 (en) * | 2013-09-09 | 2015-03-12 | NAKAISHI Shinichirou | Speaker for supporting hearing-impaired people |
US9532132B2 (en) | 2013-09-09 | 2016-12-27 | Shinichirou NAKAISHI | Hearing-impaired person assistance speaker |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS61139191A (en) | Plane speaker | |
JPS5848872Y2 (en) | speaker | |
JPS58199000A (en) | Dynamic loud speaker | |
JPH0241988Y2 (en) | ||
JPH0129920Y2 (en) | ||
JPS6338637Y2 (en) | ||
JPH0238552Y2 (en) | ||
JPS5850713Y2 (en) | speaker | |
JPS5942794Y2 (en) | dome type speaker | |
JPS5859697A (en) | Plane speaker | |
JPH0252917B2 (en) | ||
JPS6211840B2 (en) | ||
JPS6029278Y2 (en) | flat speaker | |
JPS5834866Y2 (en) | flat speaker | |
JPS58137398A (en) | Dynamic loudspeaker | |
JPH09139997A (en) | Speaker | |
JPS6170899A (en) | Plane speaker | |
JPH048716Y2 (en) | ||
JPS5834864Y2 (en) | speaker | |
JPS5843346Y2 (en) | speaker | |
JPS5892198A (en) | Dynamic speaker | |
JPS60178799A (en) | Wide band reproducing speaker | |
JPS5819915Y2 (en) | speaker | |
JPH0126239B2 (en) | ||
JPS6194499A (en) | Composite plane speaker |