JPH09252496A - Piezoelectric earphone - Google Patents
Piezoelectric earphoneInfo
- Publication number
- JPH09252496A JPH09252496A JP6091496A JP6091496A JPH09252496A JP H09252496 A JPH09252496 A JP H09252496A JP 6091496 A JP6091496 A JP 6091496A JP 6091496 A JP6091496 A JP 6091496A JP H09252496 A JPH09252496 A JP H09252496A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric
- acoustic body
- piezoelectric acoustic
- insertion tube
- eardrum
- 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.)
- Granted
Links
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
- Headphones And Earphones (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、耳に装着するかま
たは、外耳道に挿入する音響機器に関し、特に圧電体を
利用した圧電式イヤホンの構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acoustic device to be worn on the ear or inserted into the ear canal, and more particularly to a structure of a piezoelectric earphone using a piezoelectric body.
【０００２】[0002]
【従来の技術】従来の圧電音響体を用いるイヤホンにお
いては、図５に示すように、平板型の圧電音響体２が外
耳道に挿入される挿入体６に対して垂直に設けられてい
るので、音響の発生部分である圧電音響体２が外耳道の
外に位置するようになっている。2. Description of the Related Art In a conventional earphone using a piezoelectric acoustic body, as shown in FIG. 5, a flat plate type piezoelectric acoustic body 2 is provided perpendicularly to an insert body 6 inserted into the ear canal. The piezoelectric acoustic body 2 that is a sound generating portion is located outside the ear canal.
【０００３】また、特開昭５８−１５６２３３号公報に
は圧電素子を用いた圧電型イヤホンが記載されており、
第４図に平板型の圧電素子２を有するイヤーマイク２が
示されており、この圧電素子２はイヤピース挿入部１３
内に、挿入部に対して平行に挿入されている。Further, Japanese Patent Application Laid-Open No. 58-156233 discloses a piezoelectric earphone using a piezoelectric element.
FIG. 4 shows an ear microphone 2 having a flat plate type piezoelectric element 2. The piezoelectric element 2 has an earpiece insertion portion 13
It is inserted in parallel with the insertion part.
【０００４】[0004]
【発明が解決しようとする課題】上述の従来の圧電音響
体を利用したイヤホンにおける問題点は、平板型圧電音
響体が、ある程度の大きさを必要とすることとなるた
め、小型化に不向きであると言うことである。特に補聴
器に用いるとき、外耳道の外に音響発生部分を備えて外
耳道に音声を導く構造とするため目立ってしまう。The problem with the earphone using the conventional piezoelectric acoustic body described above is that it is not suitable for miniaturization because the flat plate type piezoelectric acoustic body requires a certain size. That is to say. In particular, when used in a hearing aid, it is conspicuous because of a structure in which a sound generation portion is provided outside the external auditory meatus to guide sound to the external auditory meatus.
【０００５】その理由は、平板型圧電音響体を音声の再
生に必要な共振周波数にするにはある程度の面積を必要
とする為である。平板型圧電音響体は容量性の負荷イン
ピーダンスを持つので、厚さが同じで、圧電体の誘電率
が同等であれば、面積が小さいと静電容量が小さくな
り、共振周波数が高くなり、音声の再生に適す音響出力
に不向きとなる。The reason is that a certain area is required for the flat piezoelectric acoustic body to have a resonance frequency necessary for reproducing sound. Since the flat plate type piezoelectric acoustic body has a capacitive load impedance, if the thickness is the same and the dielectric constants of the piezoelectric bodies are the same, the capacitance will be small if the area is small, and the resonance frequency will be high. Is not suitable for sound output suitable for playback of.
【０００６】[0006]
【課題を解決するための手段】本発明の圧電式イヤホン
は、外耳道に挿入させるのに適した形状を有する挿入チ
ューブに対し、圧電音響体を斜めに設定してある。具体
的には、圧電効果を有し、変移方向が長手方向かつ電界
と垂直方向である圧電板にこれを駆動する適切な形状の
正極と負極電極を相対する二面に貼り合わせた構造の平
板型圧電音響体と、これから引き出される正極と負極に
接続された信号線と、これを包むゴムまたは高分子素材
による外耳道に挿入させるのに適した柔らかさと形状を
有する挿入チューブとを有し、前記平板型圧電音響体が
挿入チューブに対し斜めに設定されている。In the piezoelectric earphone of the present invention, the piezoelectric acoustic body is obliquely set to the insertion tube having a shape suitable for insertion into the ear canal. Specifically, a flat plate having a piezoelectric effect and a positive electrode and a negative electrode having appropriate shapes for driving the piezoelectric plate, which has a longitudinal direction and a direction perpendicular to the electric field, are attached to two opposing surfaces. Type piezoelectric acoustic body, a signal line connected to the positive electrode and the negative electrode drawn therefrom, and an insertion tube having a softness and shape suitable for being inserted into the ear canal made of rubber or a polymer material that wraps the signal line, The flat plate type piezoelectric acoustic body is set obliquely to the insertion tube.
【０００７】また、圧電音響体を挿入チューブ内鼓膜方
向に開くＶ字型にかつ変移方向が鼓膜側に同方向に設定
してもよい。すなわち、圧電効果を有し、変移方向が長
手方向かつ電界と垂直方向である圧電板にこれを駆動す
る適切な形状の正極と負極の電極を相対する二面に貼り
合わせた構造の平板型圧電音響体を２枚有し、これから
引き出される正極と負極に接続された信号線と、これを
包むゴムまたは高分子素材による外耳道に挿入させるの
に適した柔らかさと形状を有する挿入チューブとを有
し、前記平板型圧電音響体が挿入チューブ内鼓膜方向に
開くＶ字型にかつ変移方向が鼓膜側に同方向に設定され
ている。Further, the piezoelectric acoustic body may be set in a V-shape that opens in the eardrum direction in the insertion tube and the displacement direction is the same direction as the eardrum side. That is, a flat plate type piezoelectric device having a piezoelectric effect and a structure in which a positive electrode and a negative electrode having an appropriate shape for driving the piezoelectric plate having a longitudinal direction and a direction perpendicular to an electric field are attached to two opposing surfaces. It has two acoustic bodies, and has a signal line connected to a positive electrode and a negative electrode drawn from this acoustic body, and an insertion tube made of rubber or a polymer material that surrounds the acoustic body and has a softness and shape suitable for insertion into the ear canal. The flat piezoelectric acoustic body is set in a V-shape that opens in the eardrum direction in the insertion tube and the displacement direction is set to the same direction on the eardrum side.
【０００８】さらに、積層型圧電音響体を用いることが
できる。具体的には、圧電効果を有し、変移方向が厚さ
方向かつ電界と同方向である圧電板にこれを駆動する正
極と負極の電極を相対する二面に貼り合わせ更にこれを
数枚重ねた構造の積層型圧電音響体と、積層型圧電音響
体の鼓膜に対し外側に配置される音響の振動を吸収する
重りと、前記積層型圧電音響体から引き出される正極と
負極に接続された信号線と、前記積層型圧電音響体と前
記重りとを包むゴムまたは高分子素材による外耳道に挿
入させるのに適した柔らかさと形状を有する挿入チュー
ブとを有し、前記挿入チューブが圧電音響体より鼓膜方
向にホーン状に開くホーン状開口部を有する。Further, a laminated piezoelectric acoustic body can be used. Specifically, a piezoelectric plate having a piezoelectric effect, the displacement direction of which is the thickness direction and the same direction as the electric field, is bonded to two opposing surfaces of a positive electrode and a negative electrode that drive the same, and several sheets of this are further stacked. A laminated piezoelectric acoustic body having a different structure, a weight for absorbing acoustic vibration arranged outside the eardrum of the laminated piezoelectric acoustic body, and a signal connected to the positive electrode and the negative electrode extracted from the laminated piezoelectric acoustic body. A wire and an insertion tube made of rubber or a polymer material that wraps the laminated piezoelectric acoustic body and the weight and has a softness and shape suitable for insertion into the ear canal. The insertion tube has a tympanic membrane rather than the piezoelectric acoustic body. It has a horn-shaped opening that opens in the direction of a horn.
【０００９】またさらに、円筒型圧電音響体を用いても
よい。すなわち、圧電効果を有し、変移方向が側面円周
方向かつ電界と垂直方向である圧電円筒にこれを駆動す
る正極と負極の電極をそれぞれ内面と外面に貼り合わせ
た構造の円筒型圧電音響体と、円筒型圧電音響体の鼓膜
に対し外側に配置される音響の振動を吸収する重りと、
前記円筒型圧電音響体から引き出される正極と負極に接
続された信号線と、前記円筒型圧電音響体から引き出さ
れる正極と負極に接続された信号線と、前記円筒型圧電
音響体と前記重りとを包むゴムまたは高分子素材による
外耳道に挿入させるのに適した柔らかさと形状を有する
挿入チューブとを有し、前記挿入チューブが円筒型圧電
音響体より鼓膜方向にホーン状に開くホーン開口部を有
する。Furthermore, a cylindrical piezoelectric acoustic body may be used. That is, a cylindrical piezoelectric acoustic body having a piezoelectric effect and a structure in which a positive electrode and a negative electrode for driving the piezoelectric cylinder having a displacement direction in a side surface circumferential direction and a direction perpendicular to an electric field are attached to an inner surface and an outer surface, respectively. And a weight that absorbs vibration of sound arranged outside the eardrum of the cylindrical piezoelectric acoustic body,
Signal lines connected to the positive and negative electrodes drawn from the cylindrical piezoelectric acoustic body, signal lines connected to the positive and negative electrodes drawn from the cylindrical piezoelectric acoustic body, the cylindrical piezoelectric acoustic body, and the weight. An insertion tube having a softness and a shape suitable for being inserted into the ear canal made of rubber or a polymer material that wraps the tube, and the insertion tube has a horn opening that opens like a horn in the eardrum direction from the cylindrical piezoelectric acoustic body. .
【００１０】[0010]
【発明の実施の形態】次に、本発明の圧電式イヤホンの
一実施形態について述べる。平板型圧電音響体は、信号
線を介し加えられた音声信号により電極から平板状の圧
電体に加わる電界の変化に応じて、音響振動を発生す
る。このとき平板型圧電音響体が挿入チューブに対し斜
めに設定されているので、柔軟なゴムまたは高分子素材
による外耳道に挿入させるのに適した形状を有する挿入
チューブ内で、音響振動が増幅され、更に奥の外耳道を
通じ、鼓膜に到達する。平板型圧電音響体は外耳道に対
し斜めに設定されているので、外耳道に対し垂直に設定
される場合よりも相対的に大きな面積を得られ。平板型
圧電音響体の共振周波数を下げられ、音響効率も向上す
る。BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the piezoelectric earphone of the present invention will be described. The flat plate type piezoelectric acoustic body generates acoustic vibration in response to a change in an electric field applied from the electrode to the flat plate type piezoelectric body by an audio signal applied via a signal line. At this time, since the flat plate type piezoelectric acoustic body is set obliquely with respect to the insertion tube, acoustic vibration is amplified in the insertion tube having a shape suitable for insertion into the ear canal made of a flexible rubber or polymer material, Furthermore, it reaches the eardrum through the ear canal in the back. Since the flat plate type piezoelectric acoustic body is set obliquely to the ear canal, a relatively large area can be obtained as compared with the case where it is set perpendicularly to the ear canal. The resonance frequency of the flat plate type piezoelectric acoustic body can be lowered, and the acoustic efficiency is also improved.
【００１１】他の実施形態においては、２枚の平板型圧
電音響体が、信号線を介し音声信号が加えられたとき、
鼓膜方向に開くＶ字型に設定され、互いに、鼓膜方向の
音圧を高め合い、音響チューブから音響振動が放出さ
れ、鼓膜に到達する。本構造においても、平板型圧電音
響体をＶ字型に設定したので、外耳道に対し垂直に設定
される場合よりも相対的に大きな面積を得られ。平板型
圧電音響体の共振周波数を下げられ、音響効率も向上す
る。In another embodiment, when two flat piezoelectric acoustic bodies are applied with an audio signal through a signal line,
It is set to a V-shape that opens in the eardrum direction, mutually enhances the sound pressure in the eardrum direction, and acoustic vibrations are emitted from the acoustic tube and reach the eardrum. Also in this structure, since the flat plate type piezoelectric acoustic body is set in the V shape, a relatively large area can be obtained as compared with the case where it is set perpendicularly to the ear canal. The resonance frequency of the flat plate type piezoelectric acoustic body can be lowered, and the acoustic efficiency is also improved.
【００１２】さらに他の実施形態においては、積層型圧
電音響体は、信号線を介し、圧電効果を有し、変移方向
が厚さ方向かつ電界と同方向である圧電板にこれを駆動
する正極と負極の電極を相対する二面に貼り合わせ更に
これを数枚重ねた構造の積層型圧電音響体の各層の圧電
体に音声信号に対応する、電界が加えられたとき、積層
方向に伸縮し、音響信号を発生する。このとき鼓膜に対
し外側にある音響の振動を吸収する重りにより、音響振
動は鼓膜側に出力され、積層型圧電音響体より鼓膜方向
にホーン状に開いた挿入チューブのホーン状開口部から
音響として出力される。積層型圧電音響体は外耳道内
に、積層し設定されているので、外耳道に対し垂直に設
定される場合よりも積層が数倍大きな面積を得られ。平
板型圧電音響体の共振周波数が下げられ、音響効果も向
上する。In still another embodiment, the laminated piezoelectric acoustic body has a piezoelectric effect via a signal line, and a positive electrode for driving the piezoelectric plate having a piezoelectric effect and a displacement direction in the thickness direction and the same direction as the electric field. The negative electrode and the negative electrode are attached to the opposite two surfaces, and further, several layers of this structure are laminated, and the piezoelectric body of each layer of the laminated piezoelectric acoustic body responds to the audio signal and expands and contracts in the stacking direction when an electric field is applied. , Generate an acoustic signal. At this time, the acoustic vibration is output to the eardrum side by the weight that absorbs the vibration of the sound outside the eardrum, and the sound is output from the horn-shaped opening of the insertion tube opened in the horn shape from the laminated piezoelectric acoustic body as the sound. Is output. Since the laminated piezoelectric acoustic body is set to be stacked in the ear canal, the area obtained by stacking is several times larger than that in the case where it is set perpendicularly to the ear canal. The resonance frequency of the flat plate type piezoelectric acoustic body is lowered, and the acoustic effect is also improved.
【００１３】さらに他の実施形態においては、円筒型圧
電音響体が、信号線を介し、圧電効果を有し、変移方向
が側面円周方向かつ電界と垂直方向である圧電円筒にこ
れを駆動する正極と負極の電極をそれぞれ内面と外面に
貼り合わせた構造の積層型圧電音響体の側面の圧電体に
音声信号に対応する、電界が加えられたとき、側面円周
方向に伸縮し、円筒の内部に音響振動を発生する。この
とき鼓膜に対し外側にある音響の振動を吸収する重りに
より、音響振動は鼓膜側に出力され、円筒型圧電音響体
より鼓膜方向にホーン状に開いた挿入チューブのホーン
状開口部から音響として出力される。円筒型圧電音響体
は外耳道内に、円筒状に設定されているので、外耳道に
対し垂直に設定される場合よりも数倍大きな面積を得ら
れ、圧電音響体の共振周波数を下げられ、音響効率も向
上する。In still another embodiment, a cylindrical piezoelectric acoustic body has a piezoelectric effect via a signal line, and drives the piezoelectric acoustic body to a piezoelectric cylinder having a side surface circumferential direction and a direction perpendicular to an electric field. When the electric field is applied to the piezoelectric body on the side surface of the laminated piezoelectric acoustic body having the structure in which the positive electrode and the negative electrode are attached to the inner surface and the outer surface, respectively, when the electric field is applied, the side surface expands and contracts in the circumferential direction to form a cylindrical shape. Generates acoustic vibration inside. At this time, the acoustic vibration is output to the eardrum side by the weight that absorbs the vibration of the sound outside the eardrum, and as a sound is output from the horn-shaped opening of the insertion tube opened like a horn in the eardrum direction from the cylindrical piezoelectric acoustic body. Is output. Since the cylindrical piezoelectric acoustic body is set in the ear canal in a cylindrical shape, an area several times larger than that of the case where it is set perpendicular to the ear canal can be obtained, the resonance frequency of the piezoelectric acoustic body can be lowered, and the acoustic efficiency can be reduced. Also improves.
【００１４】なお、圧電体の利用形態として、平板型の
圧電音響体及びバイモルフ型圧電アクチュエータ及び積
層型圧電アクチュエータ等が一般的に実用化されてお
り、ＰＺＴ、ロッシェル塩等が多く使われている。As a form of using the piezoelectric body, a flat plate type piezoelectric acoustic body, a bimorph type piezoelectric actuator, a laminated type piezoelectric actuator and the like are generally put into practical use, and PZT, Rochelle salt and the like are often used. .
【００１５】[0015]
【実施例】次に、本発明の実施例について図面を参照し
て詳細に説明する。Next, embodiments of the present invention will be described in detail with reference to the drawings.
【００１６】図１（Ａ）、（Ｂ）を参照すると、本発明
の第一の実施例の圧電式イヤホン１は、圧電効果を有
し、変移方向が長手方向かつ電界と垂直方向である圧電
板３にこれを駆動する適切な形状の正極と負極の電極４
を相対する二面に貼り合わせた構造の平板型圧電音響体
２と、これから引き出される正極と負極に接続された信
号線５と、これを包む柔軟なゴムまたは高分子素材によ
る外耳道に挿入させるのに適した形状を有する挿入チュ
ーブ６とを有し、前記平板型圧電音響体２が挿入チュー
ブ６に対し斜めに設定されており、挿入チューブ６の鼓
膜と反対側は、気圧平衡穴１４を備える外装体１０によ
って保持される。Referring to FIGS. 1A and 1B, the piezoelectric earphone 1 according to the first embodiment of the present invention has a piezoelectric effect, and the displacement direction is the longitudinal direction and the direction perpendicular to the electric field. The plate 3 has a positive electrode 4 and a negative electrode 4 having a proper shape for driving the plate 3.
The plate type piezoelectric acoustic body 2 having a structure in which the two are opposed to each other, the signal lines 5 connected to the positive electrode and the negative electrode, and the flexible rubber or polymer material that surrounds the signal line 5 are inserted into the ear canal. And the flat plate type piezoelectric acoustic body 2 is set obliquely with respect to the insertion tube 6, and the opposite side of the insertion tube 6 from the eardrum is provided with a pressure balance hole 14. It is held by the outer package 10.
【００１７】次に、本発明の実施例について、図１
（Ａ）の断面図および図１（Ｂ）の平板型圧電音響体の
構造図を参照して動作を説明する。平板型圧電音響体２
が、信号線５を介し加えられた音声信号により電極４か
ら圧電板３に加わる電界の変化に応じて、音響振動を発
生する。図１（Ｂ）に示す様に圧電板３の一部に設けら
れた電極が正極と負極と対向して圧電体に厚さ方向に電
界を加える部分だけを長手方向に伸縮（ｄ）させ、他の
部分は変化しない為、圧電板の反りとなり、音響振動
（ｓ）になる動作は、圧電音響部品で一般的である。厚
み方向に張り合わせる電極または電界によって伸縮しな
い構造を有する、バイモルフ型とすることもできる。こ
のとき平板型圧電音響体２が挿入チューブ６に対し斜め
に設定されているので、外耳道に挿入され曲がった、柔
軟なゴムまたは高分子素材による外耳道に挿入させるの
に適した形状を有する挿入チューブ６内で、音響振動が
増幅され、更に奥の外耳道を通じ、鼓膜に到達する。平
板型圧電音響体２は外耳道に対し斜めに設定されている
ので、外耳道に対し垂直に設定される場合よりも相対的
に大きな面積を得られ、平板型圧電音響体２の共振周波
数を下げられ、音響効果率も向上する。挿入チューブ６
の鼓膜と反対側は外装体１０によって保持されるが、気
圧平衡穴１４は、音響特性の調整と、外耳道内の気圧を
イヤホンによって密閉させず外気圧と平衡させる。FIG. 1 shows an embodiment of the present invention.
The operation will be described with reference to the sectional view of FIG. 1A and the structural diagram of the flat plate type piezoelectric acoustic body of FIG. Flat piezoelectric acoustic body 2
However, acoustic vibration is generated in response to a change in the electric field applied from the electrode 4 to the piezoelectric plate 3 by the audio signal applied via the signal line 5. As shown in FIG. 1 (B), the electrode provided on a part of the piezoelectric plate 3 faces the positive electrode and the negative electrode, and only the portion for applying an electric field in the thickness direction to the piezoelectric body is expanded and contracted (d) in the longitudinal direction, Since the other parts do not change, the piezoelectric plate warps and the acoustic vibration (s) is generally generated in the piezoelectric acoustic component. It is also possible to use a bimorph type having a structure that does not expand or contract due to an electrode stuck in the thickness direction or an electric field. At this time, since the flat plate type piezoelectric acoustic body 2 is set obliquely with respect to the insertion tube 6, the insertion tube having a shape suitable for being inserted into the ear canal and made of a flexible, flexible rubber or polymer material which is bent and inserted. The acoustic vibration is amplified in 6 and reaches the eardrum through the ear canal in the back. Since the flat-plate piezoelectric acoustic body 2 is set obliquely with respect to the external auditory meatus, a relatively larger area can be obtained as compared with the case where the flat-plate piezoelectric acoustic body 2 is set vertically, and the resonance frequency of the flat-plate piezoelectric acoustic body 2 can be lowered. , The sound effect rate is also improved. Insertion tube 6
The side opposite to the eardrum is held by the exterior body 10, but the air pressure balance hole 14 adjusts the acoustic characteristics and balances the air pressure in the ear canal with the earphones without sealing the air pressure in the ear canal.
【００１８】次に、第二の実施例について、図２を参照
して説明する。第二の実施例の圧電式イヤホン１は、圧
電効果を有し、変移方向が厚さ方向かつ電界と同方向で
ある圧電板３にこれを駆動する正極と負極の電極４を相
対する二面に貼り合わせ更にこれを数枚重ねた構造の積
層型圧電音響体７と、積層型圧電音響体７の外側に配置
される音響の振動を吸収する重り８と積増型圧電音響体
７から引き出される正極と負極に接続された信号線５
と、積層型圧電音響体７と重り８とを包む柔軟なゴムま
たは高分子素材による外耳道に挿入させるのに適した形
状を有する挿入チューブ６とを有し、挿入チューブ６は
積層型圧電音響体７より鼓膜方向にホーン状に開くホー
ン状開口部９を有す。これの動作を以下に説明する。積
層型圧電音響体７は、信号線５を介し、圧電効果を有
し、変移方向が厚さ方向かつ電界と同方向である圧電板
３にこれを駆動する正極と負極の電極４を相対する二面
に貼り合わせ、更にこれを数枚重ねた構造の積層型圧電
音響体７の各層の圧電体３に音声信号に対応する電界が
加えられたとき、積層方向に伸縮し、音響振動（ｓ）を
発生する。このとき鼓膜に対して外側にある音響の振動
を吸収する重り８により、音響振動は鼓膜側に出力さ
れ、積層型圧電音響体７より鼓膜方向にホーン状に開い
た挿入チューブ６のホーン状開口部９から音響として出
力される。重り８は挿入チューブ６または外装体１０の
一部によって代用されても良い。Next, a second embodiment will be described with reference to FIG. The piezoelectric earphone 1 according to the second embodiment has a piezoelectric effect, and has a positive electrode and a negative electrode 4 for driving the piezoelectric plate 3 which has a displacement direction in the thickness direction and the same direction as the electric field. The laminated piezoelectric acoustic body 7 having a structure in which a plurality of the laminated piezoelectric acoustic bodies 7 are stacked together, a weight 8 arranged outside the laminated piezoelectric acoustic body 7 for absorbing acoustic vibration, and a stacked type piezoelectric acoustic body 7. Signal line 5 connected to the positive and negative electrodes
And an insertion tube 6 having a shape suitable for being inserted into the ear canal made of a flexible rubber or polymer material that wraps the laminated piezoelectric acoustic body 7 and the weight 8. The insertion tube 6 is a laminated piezoelectric acoustic body. It has a horn-shaped opening 9 that opens like a horn in the eardrum direction from 7. The operation of this will be described below. The laminated piezoelectric acoustic body 7 has a piezoelectric effect via a signal line 5, and a positive electrode and a negative electrode 4 for driving the piezoelectric plate 3 facing the piezoelectric plate 3 having a displacement direction in the thickness direction and the same direction as the electric field face each other. When an electric field corresponding to a sound signal is applied to the piezoelectric body 3 of each layer of the laminated piezoelectric acoustic body 7 having a structure in which two or more layers are laminated and further laminated, acoustic vibration (s) ) Occurs. At this time, the acoustic vibration is output to the eardrum side by the weight 8 which is located outside the eardrum and absorbs the acoustic vibration, and the horn-shaped opening of the insertion tube 6 opened in the horn shape from the laminated piezoelectric acoustic body 7 in the eardrum direction. The sound is output from the section 9. The weight 8 may be replaced by the insertion tube 6 or a part of the outer casing 10.
【００１９】その他実施例について、図３および図４を
参照して簡単に説明する。Another embodiment will be briefly described with reference to FIGS. 3 and 4.
【００２０】図３においては、平板型圧電音響体２をＶ
字型に配置したものである。平板型圧電音響体２の動作
は実施例１と同じである。２枚の平板型圧電音響体２が
それぞれ発生した音響振動（ｓ）が互いに強め合う様に
配置される。図４は、円筒型圧電音響体を利用したもの
である。円筒型圧電音響体は信号電圧に応じ、円筒の側
面周囲を伸縮させ、直径を伸縮させ、音響振動（ｓ）を
発生する。In FIG. 3, the flat plate type piezoelectric acoustic body 2 is denoted by V.
It is arranged in a letter shape. The operation of the flat plate type piezoelectric acoustic body 2 is the same as that of the first embodiment. The acoustic vibrations (s) generated by the two flat plate type piezoelectric acoustic bodies 2 are arranged so as to reinforce each other. FIG. 4 uses a cylindrical piezoelectric acoustic body. The cylindrical piezoelectric acoustic body expands and contracts around the side surface of the cylinder and expands and contracts the diameter according to the signal voltage to generate acoustic vibration (s).
【００２１】[0021]
【発明の効果】以上説明したように、本発明の圧電式イ
ヤホンは、圧電音響体を、外耳道内に挿入可能なチュー
ブ状の形状の中で許容される容積内において、より大き
な音響振動の発生面積を確保できる構成とすることによ
り、イヤホンを小型かつ軽量にすることができ、従っ
て、外観が目立たなく、かつ長時間の使用にも疲労感の
少い、外耳道に挿入可能なイヤホンを提供できる。As described above, in the piezoelectric earphone of the present invention, a larger acoustic vibration is generated within the volume allowed in the tubular shape in which the piezoelectric acoustic body can be inserted into the ear canal. Due to the structure that can secure the area, the earphone can be made small and lightweight, and therefore, the earphone that can be inserted into the ear canal can be provided with an inconspicuous appearance and less fatigue even when used for a long time. .
【００２２】更に、音響駆動される圧電音響体が外耳道
内に挿入される構成となっているため、イヤホンにより
外耳道が塞がれ外耳道内の容積が減り、より小さな電力
で圧電音響体の作動が可能になるため、省電力が図られ
イヤホンを使用する携帯機器の消費電力を抑え、電池動
作時間を長くすることができる効果がある。Further, since the piezoelectrically driven acoustically driven body is inserted into the ear canal, the ear canal is blocked by the earphone to reduce the volume in the ear canal, and the piezoelectric acoustic body can be operated with a smaller electric power. Therefore, there is an effect that power saving can be achieved, power consumption of a portable device using an earphone can be suppressed, and battery operation time can be extended.
【００２３】この結果、特に、長時間装着する事が一般
的な、補聴器のイヤホンとして、補聴器を小型かつ軽量
にし、装着感を改善し、疲労感を軽減することができ
る。As a result, in particular, as an earphone for a hearing aid that is generally worn for a long time, the hearing aid can be made small and lightweight, the wearing feeling can be improved, and the feeling of fatigue can be reduced.
【図１】（Ａ）本発明の圧電式イヤホンの一実施例を示
す断面図。 （Ｂ）図１（Ａ）の実施例の平板型圧電音響体の構造を
示す平面投影図。FIG. 1A is a sectional view showing an embodiment of a piezoelectric earphone of the present invention. FIG. 1B is a plan view showing the structure of the flat plate type piezoelectric acoustic body of the embodiment of FIG.
【図２】積層型圧電音響体を用いる圧電式イヤホンの実
施例の断面図。FIG. 2 is a sectional view of an embodiment of a piezoelectric earphone using a laminated piezoelectric acoustic body.
【図３】二枚の平板型圧電音響体を配置した圧電式イヤ
ホンの実施例の断面図。FIG. 3 is a sectional view of an embodiment of a piezoelectric earphone in which two flat plate type piezoelectric acoustic bodies are arranged.
【図４】円筒型圧電音響体を利用した実施例の断面図。FIG. 4 is a sectional view of an example using a cylindrical piezoelectric acoustic body.
【図５】従来の圧電型イヤホンの構造の一例を示す外観
図である。FIG. 5 is an external view showing an example of the structure of a conventional piezoelectric earphone.
１ 圧電式イヤホン ２ 平板型圧電音響体 ３ 圧電板 ４ 電極 ５ 信号線 ６ 挿入チューブ ７ 積層型圧電音響体 ８ 重り ９ ホーン状開口部 １０ 外装体 １１ 円筒型圧電音響体 １３ 圧電円筒 １４ 気圧平衡穴 ｓ 音響振動 ｄ 圧電体の伸縮変移 DESCRIPTION OF SYMBOLS 1 Piezoelectric earphone 2 Flat piezoelectric acoustic body 3 Piezoelectric plate 4 Electrode 5 Signal line 6 Insertion tube 7 Laminated piezoelectric acoustic body 8 Weight 9 Horn-shaped opening 10 Exterior body 11 Cylindrical piezoelectric acoustic body 13 Piezoelectric cylinder 14 Atmospheric pressure balancing hole s Acoustic vibration d Expansion and contraction of piezoelectric body
Claims (4)
つ電界と垂直方向である圧電板にこれを駆動する適切な
形状の正極と負極の電極を相対する二面に貼り合わせた
構造の平板型圧電音響体と、この平板型圧電音響体から
引き出される正極と負極に接続された信号線と、前記平
板型圧電音響体を包むゴムまたは高分子素材からなる外
耳道内に挿入するに適した柔らかさと形状を有する挿入
チューブとを有し、前記平板型圧電音響体が挿入チュー
ブに対し斜めに設定されていることを特徴とする圧電式
イヤホン。1. A structure having a structure in which a positive electrode and a negative electrode having appropriate shapes for driving a piezoelectric plate having a piezoelectric effect and a displacement direction being a longitudinal direction and a direction perpendicular to an electric field are attached to two opposing surfaces. Suitable for inserting into a flat-plate piezoelectric acoustic body, a signal line connected to a positive electrode and a negative electrode drawn from the flat-plate piezoelectric acoustic body, and an ear canal made of rubber or polymer material that surrounds the flat-plate piezoelectric acoustic body. A piezoelectric earphone, comprising: an insertion tube having a softness and a shape, wherein the flat plate type piezoelectric acoustic body is set obliquely with respect to the insertion tube.
つ電界と垂直方向である圧電板に、これを駆動する適切
な形状の正極と負極の電極を相対する二面に貼り合わせ
た構造の平板型圧電音響体を２枚有し、この平板型圧電
音響体から引き出される正極と負極に接続された信号線
と、前記２枚の平板型圧電音響体を包むゴムまたは高分
子素材からなる外耳道内に挿入するに適した柔らかさと
形状を有する挿入チューブとを有し、前記２枚の平板型
圧電音響体が挿入チューブ内において鼓膜の方向に開く
Ｖ字型に、かつその変移方向が鼓膜側に同方向に設定さ
れていることを特徴とする圧電式イヤホン。2. A structure in which a positive electrode and a negative electrode having appropriate shapes for driving the piezoelectric plate having a piezoelectric effect and a displacement direction being a longitudinal direction and a direction perpendicular to an electric field are attached to two opposing surfaces. Of two flat plate type piezoelectric acoustic bodies, the signal line connected to the positive electrode and the negative electrode drawn from the flat plate type piezoelectric acoustic body, and made of rubber or polymer material wrapping the two flat type piezoelectric acoustic bodies. An insertion tube having a softness and a shape suitable for insertion into the ear canal, wherein the two flat plate type piezoelectric acoustic bodies have a V-shape that opens in the insertion tube toward the eardrum, and the transition direction thereof is the eardrum. Piezoelectric earphones that are set in the same direction on the side.
つ電界と同方向である圧電板に、これを駆動する正極と
負極の電極を相対する二面に貼り合わせ、更にこれを数
枚重ねた構造の積層型圧電音響体と、前記積層板型圧電
音響体の鼓膜に対し外側に配置される音響の振動を吸収
する重りと、前記積層型圧電音響体から引き出される正
極と負極に接続された信号線と、前記積層型圧電音響体
と前記重りを包むゴムまたは高分子素材からなる外耳道
内に挿入するに適した柔らかさと形状を有する挿入チュ
ーブとを有し、前記挿入チューブが積層型圧電音響体よ
り鼓膜方向にホーン状に開くホーン状開口部を有するこ
とを特徴とする圧電式イヤホン。3. A piezoelectric plate having a piezoelectric effect, the displacement direction of which is the thickness direction and the same direction as that of an electric field, is bonded to two opposite surfaces of a positive electrode and a negative electrode for driving the piezoelectric plate, which are further numbered. A laminated piezoelectric acoustic body having a stacked structure, a weight for absorbing acoustic vibrations arranged outside the eardrum of the laminated plate type piezoelectric acoustic body, and a positive electrode and a negative electrode drawn from the laminated piezoelectric acoustic body. A signal line connected to the laminated piezoelectric acoustic body, and an insertion tube made of rubber or a polymer material that wraps the weight and having a softness and shape suitable for insertion into the ear canal, and the insertion tube is laminated. A piezoelectric earphone having a horn-shaped opening that opens like a horn in the eardrum direction from the piezoelectric acoustic body.
向かつ電界と垂直方向である圧電円筒にこれを駆動する
正極と負極の電極をそれぞれ内面と外面に貼り合わせた
構造の円筒型圧電音響体と、前記円筒型圧電音響体の鼓
膜に対し外側に配置される音響の振動を吸収する重り
と、前記円筒型圧電音響体から引き出される正極と負極
に接続された信号線と、前記円筒型圧電音響体と前記重
りを包むゴムまたは高分子素材からなる外耳道内に挿入
するに適した柔らかさと形状を有する挿入チューブとを
有し、前記挿入チューブが円筒型圧電音響体より鼓膜方
向にホーン状に開くホーン状開口部を有することを特徴
とする圧電式イヤホン。4. A cylindrical type having a piezoelectric effect and a structure in which a positive electrode and a negative electrode for driving the piezoelectric cylinder having a displacement direction in a side surface circumferential direction and a direction perpendicular to an electric field are bonded to an inner surface and an outer surface, respectively. A piezoelectric acoustic body, a weight for absorbing acoustic vibration arranged outside the eardrum of the cylindrical piezoelectric acoustic body, a signal line connected to a positive electrode and a negative electrode drawn from the cylindrical piezoelectric acoustic body, A cylindrical piezoelectric acoustic body and an insertion tube having a softness and shape suitable for insertion into the ear canal made of rubber or a polymer material that wraps the weight, and the insertion tube is located in the eardrum direction more than the cylindrical piezoelectric acoustic body. A piezoelectric earphone having a horn-shaped opening that opens like a horn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6091496A JP2882346B2 (en) | 1996-03-18 | 1996-03-18 | Piezoelectric earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6091496A JP2882346B2 (en) | 1996-03-18 | 1996-03-18 | Piezoelectric earphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09252496A true JPH09252496A (en) | 1997-09-22 |
| JP2882346B2 JP2882346B2 (en) | 1999-04-12 |
Family
ID=13156135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6091496A Expired - Lifetime JP2882346B2 (en) | 1996-03-18 | 1996-03-18 | Piezoelectric earphone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2882346B2 (en) |
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| JP2009049757A (en) * | 2007-08-21 | 2009-03-05 | Pioneer Electronic Corp | Ear-inserted type earphone |
| JP2009232443A (en) * | 2008-02-29 | 2009-10-08 | Nec Tokin Corp | Receiver |
| WO2009141912A1 (en) * | 2008-05-23 | 2009-11-26 | 日本エムエムアイテクノロジー株式会社 | Earphone apparatus |
| US20090304220A1 (en) * | 2008-06-04 | 2009-12-10 | Takashi Fujikura | Earphone |
| JP2014072864A (en) * | 2012-10-01 | 2014-04-21 | Kyocera Corp | Sound generator, piezoelectric vibration part for sound generator, and sound generating system |
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|---|---|---|---|---|
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| JP2009232443A (en) * | 2008-02-29 | 2009-10-08 | Nec Tokin Corp | Receiver |
| WO2009141912A1 (en) * | 2008-05-23 | 2009-11-26 | 日本エムエムアイテクノロジー株式会社 | Earphone apparatus |
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| US20090304220A1 (en) * | 2008-06-04 | 2009-12-10 | Takashi Fujikura | Earphone |
| JP2014072864A (en) * | 2012-10-01 | 2014-04-21 | Kyocera Corp | Sound generator, piezoelectric vibration part for sound generator, and sound generating system |
| US9712922B2 (en) | 2012-10-01 | 2017-07-18 | Kyocera Corporation | Sound generator, vibration member for the sound generator, and sound generation system |
| US9913047B2 (en) | 2012-10-01 | 2018-03-06 | Kyocera Corporation | Sound generator, vibration member for the sound generator, and sound generation system |
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| WO2014162409A1 (en) * | 2013-04-01 | 2014-10-09 | パイオニア株式会社 | Earphone device |
| US10231059B2 (en) | 2013-10-30 | 2019-03-12 | Kyocera Corporation | Sound generator |
| US10448170B2 (en) | 2013-10-30 | 2019-10-15 | Kyocera Corporation | Sound generator and sound generation system |
| JP2015192220A (en) * | 2014-03-27 | 2015-11-02 | 京セラ株式会社 | sound generator |
| US10335084B2 (en) | 2014-09-08 | 2019-07-02 | Kyocera Corporation | Audio device |
| JP2016055155A (en) * | 2014-09-08 | 2016-04-21 | 京セラ株式会社 | Acoustic equipment |
| JP2017216725A (en) * | 2017-07-26 | 2017-12-07 | 京セラ株式会社 | Sound generator |
| JP2019087790A (en) * | 2017-11-01 | 2019-06-06 | ヤマハ株式会社 | Transducer |
| WO2019088090A1 (en) * | 2017-11-01 | 2019-05-09 | ヤマハ株式会社 | Transducer |
| US11284200B2 (en) | 2017-11-01 | 2022-03-22 | Yamaha Corporation | Transducer |
| JP2020014106A (en) * | 2018-07-18 | 2020-01-23 | ヤマハ株式会社 | Electroacoustic transducer |
| WO2021178069A1 (en) * | 2020-03-05 | 2021-09-10 | Facebook Technologies, Llc | Miniature high performance mems piezoelectric transducer for in-ear applications |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2882346B2 (en) | 1999-04-12 |
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