JP3529559B2 - Electromechanical sound transducer and portable terminal device using the same - Google Patents
Electromechanical sound transducer and portable terminal device using the sameInfo
- Publication number
- JP3529559B2 JP3529559B2 JP21379496A JP21379496A JP3529559B2 JP 3529559 B2 JP3529559 B2 JP 3529559B2 JP 21379496 A JP21379496 A JP 21379496A JP 21379496 A JP21379496 A JP 21379496A JP 3529559 B2 JP3529559 B2 JP 3529559B2
- Authority
- JP
- Japan
- Prior art keywords
- electromechanical
- mechanical
- converter
- acoustic transducer
- transducer
- 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 - Fee Related
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は携帯電話などの携帯
端末装置に取り付けて、振動あるいは音によって着信を
知らせる電気機械音響変換器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromechanical acoustic converter mounted on a mobile terminal device such as a mobile phone to notify an incoming call by vibration or sound.
【０００２】[0002]
【従来の技術】図１５は従来例の電気機械音響変換器の
断面図を示している。図において、筐体１の内部に、ヨ
ーク５、環状マグネット３及び環状ヨークプレート４に
よって磁気回路が構成されている。環状ヨークプレート
４はダンパ６を介して筐体１に取り付けられている。筺
体１の開口部には、ボイスコイル９が巻かれたボビン８
を有する筺体２が設けられており、ボイスコイル９が磁
気回路の磁気ギャップに入るように位置決めされてい
る。上記の構成において、ボイスコイル９に電気信号が
入力されるとボイスコイル９に駆動力が発生する。同時
に、前記駆動力の反力が発生し、磁気回路のヨーク５を
振動させる。ヨーク５の振動はダンパ６を介して筐体１
に伝わり、筐体１を振動させる。2. Description of the Related Art FIG. 15 shows a sectional view of a conventional electromechanical acoustic transducer. In the drawing, a magnetic circuit is configured inside the housing 1 by the yoke 5, the annular magnet 3 and the annular yoke plate 4. The annular yoke plate 4 is attached to the housing 1 via a damper 6. A bobbin 8 around which a voice coil 9 is wound is provided in the opening of the housing 1.
Is provided and the voice coil 9 is positioned so as to enter the magnetic gap of the magnetic circuit. In the above configuration, when an electric signal is input to the voice coil 9, driving force is generated in the voice coil 9. At the same time, a reaction force of the driving force is generated and vibrates the yoke 5 of the magnetic circuit. The vibration of the yoke 5 is transmitted via the damper 6 to the housing 1
And vibrates the housing 1.
【０００３】このような従来の電気機械音響変換器にお
いて筐体１の振動レベル（振幅）を大きくするために
は、入力される電気信号のレベルを上げるか磁気回路の
質量を大きくする必要がある。In order to increase the vibration level (amplitude) of the casing 1 in such a conventional electromechanical acoustic transducer, it is necessary to increase the level of the input electric signal or increase the mass of the magnetic circuit. .
【０００４】[0004]
【発明が解決しようとする課題】携帯電話をはじめとし
た携帯端末装置においては小型化、軽量化が要求されて
いる。従って携帯端末装置に内蔵される電気機械音響変
換器においても同様に小型化、軽量化が要求されてい
る。前記の従来の電気機械音響変換器では、磁気回路の
質量を大きくするか又は大きな電池を用いて入力される
電気信号のレベルを上げる必要があるため、装置が大型
になり軽量化が困難であった。There is a demand for downsizing and weight saving of mobile terminal devices such as mobile phones. Therefore, the electromechanical sound converter incorporated in the mobile terminal device is similarly required to be smaller and lighter. In the above-mentioned conventional electromechanical acoustic transducer, it is necessary to increase the mass of the magnetic circuit or increase the level of the electric signal input by using a large battery, which makes the device large and difficult to reduce the weight. It was
【０００５】[0005]
【課題を解決するための手段】本発明による電気機械音
響変換器は、機械変成器を用いることによって電気機械
音響変換器の実質的な質量を増大させることなく小型か
つ軽量で大きな振動レベルを得ることができる。The electromechanical-acoustic transducer according to the present invention uses a mechanical transformer to obtain a large vibration level in a small size and a light weight without increasing the substantial mass of the electromechanical-acoustic transducer. be able to.
【０００６】[0006]
【発明の実施の形態】本発明の電気機械音響変換器は、
一次側からみた二次側の機械インピーダンスが二次側の
機械インピーダンスと作用点部間の距離と作用点部支点
部間の距離で構成される機械変成比により変換される、
少なくとも１つの機械変成器を有し、この機械変成器の
支点部に基板部を結合し、電気信号を機械振動に変換す
る電気機械変換器を機械変成器の一次側に結合するとと
もに基板部に少なくとも１つ以上の支持系で結合してい
る。BEST MODE FOR CARRYING OUT THE INVENTION The electromechanical acoustic transducer of the present invention comprises:
The mechanical impedance of the secondary side viewed from the primary side is converted by the mechanical transformation ratio composed of the mechanical impedance of the secondary side, the distance between the action point parts and the distance between the action point part fulcrums,
At least one mechanical transformer is provided, the substrate portion is coupled to the fulcrum portion of the mechanical transformer, and the electromechanical converter for converting an electric signal into mechanical vibration is coupled to the primary side of the mechanical transformer and at the same time to the substrate portion. It is attached by at least one or more support systems.
【０００７】また、電気機械変成器に結合し、機械振動
による信号を音響信号に変換して、振動と音を単独また
は同時に出力する機械音響変換器を備えている。前記電
気機械変換器は動電型変換器の磁気回路部であり、前記
磁気回路部の磁気ギャップ中に挿入された励振コイルの
一端を基板部に結合している。前記電気機械変換器は動
電型変換器の磁気回路部を有し、前記磁気回路部の磁気
ギャップ中に挿入された励振コイルの一端に機械音響変
換器である振動板を結合している。Further, there is provided a mechanical-acoustic converter which is coupled to the electromechanical transformer, converts a signal due to mechanical vibration into an acoustic signal, and outputs vibration and sound individually or simultaneously. The electromechanical converter is a magnetic circuit unit of an electrodynamic converter, and one end of an exciting coil inserted in a magnetic gap of the magnetic circuit unit is coupled to a substrate unit. The electromechanical converter has a magnetic circuit part of an electrodynamic converter, and a vibration plate which is a mechanical acoustic converter is coupled to one end of an exciting coil inserted in a magnetic gap of the magnetic circuit part.
【０００８】前記電気機械変換器は電磁型変換器の磁気
回路部を有し、前記磁気回路部と空隙を設けて対向配置
した強磁性体の振動板の少なくとも一部を基板部に結合
している。前記電気機械変換器は電磁型変換器の磁気回
路部を有し、前記磁気回路部と空隙を設けて対向配置し
た強磁性体の振動板の少なくとも一部を基板部に結合
し、また少なくとも一部を機械音響変換器である振動板
として機能させる。二次側の機械インピーダンスは、機
械変成器の一部に結合した負荷部材の質量である。The electromechanical converter has a magnetic circuit section of an electromagnetic converter, and at least a part of a ferromagnetic diaphragm disposed opposite to the magnetic circuit section with a gap is coupled to the substrate section. There is. The electromechanical converter has a magnetic circuit section of an electromagnetic converter, and at least a part of a ferromagnetic diaphragm disposed facing the magnetic circuit section with a gap is coupled to the substrate section, and at least one The part functions as a diaphragm that is a mechanical acoustic transducer. The secondary side mechanical impedance is the mass of the load member coupled to a portion of the mechanical transformer.
【０００９】基板部の中央部において、電気機械変換器
を支持している。基板部の周辺部において電気機械変換
器を支持している。機械変成器はサスペンションを介し
て基板部に結合している。サスペンションの形状を機械
変成器の振動方向に垂直な面に対して対称な形状として
いる。機械変成器および支持系を、それぞれ中心部に対
し相対する位置に１組以上配し、電気機械変換器と結合
している。The electromechanical converter is supported in the central portion of the substrate portion. The electromechanical converter is supported in the peripheral part of the substrate part. The mechanical transformer is coupled to the substrate portion via the suspension. The suspension shape is symmetrical with respect to the plane perpendicular to the vibration direction of the mechanical transformer. One or more sets of the mechanical transformer and the support system are arranged at positions facing each other with respect to the central portion, and are connected to the electromechanical converter.
【００１０】機械変成器と支持系を中心部に対し相対す
る位置に１組以上配し、電気機械変換器と結合してい
る。支持系の剛性と電気機械変換器の質量による共振系
の共振周波数より、機械変成器の剛性と電気機械変成器
の質量による共振系の共振周波数が低くなされている。
所定の周波数帯域幅を持つ信号を発生する電気信号発生
装置を有する。本発明の電気機械音響変換器を内蔵する
携帯端末装置は、電気信号が入力されると筺体が振動す
る。電気機械音響変換器を内蔵する携帯端末装置は、電
気信号が入力されると筺体が振動または発音あるいは振
動かつ発音する。One or more sets of the mechanical transformer and the support system are arranged at positions facing each other with respect to the central portion, and are connected to the electromechanical converter. The resonance frequency of the resonance system due to the rigidity of the mechanical transformer and the mass of the electromechanical transformer is lower than the resonance frequency of the resonance system due to the rigidity of the support system and the mass of the electromechanical converter.
It has an electric signal generator for generating a signal having a predetermined frequency bandwidth. In the mobile terminal device incorporating the electromechanical acoustic converter of the present invention, the housing vibrates when an electric signal is input. In a mobile terminal device having a built-in electromechanical acoustic converter, the housing vibrates or sounds or vibrates and sounds when an electric signal is input.
【００１１】［実施例］以下、本発明の実施例につい
て、図１から図１０を用いて説明する。[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 10.
【００１２】《実施例１》図１は本発明の実施例１の電
気機械音響変換器の斜視図であり、図２は図１のII−II
断面図である。図１および図２において、マグネット１
０、ヨーク１１および１２によって磁気回路が形成され
ている。以後、マグネット１０、ヨーク１１および１２
を磁気回路体１０Ａと呼ぶ。ヨーク１２は、てこ１７の
作用点１９においててこ１７に結合されている。作用点
１９には基板１５に固定されたボイスコイル１３との相
互作用によって上下方向の駆動力を生じる磁気回路体１
０Ａの上下方向駆動力が作用体１７Ａにより伝えられ
る。ヨーク１２にはさらに支柱１４に結合された板バネ
１８が結合させている。支柱の下端は基板１５に結合さ
れている。基板１５にはボイスコイル１３が設けられ磁
気回路内に挿入されている。てこ１７の一端にはそれぞ
れ円弧状の負荷質量体１６が設けられている。またてこ
１７の作用点１９と支柱１４間には円弧状のサスペンシ
ョン２１が設けられている。サスペンション２１と支柱
１４との結合部は基板１５に固定されていて不動の点で
あり、支点としての作用をする。したがってこの部分を
支点２０と呼ぶ。てこ１７と板バネ１８の剛性は、てこ
１７の剛性と磁気回路体１０Ａの質量による共振系の共
振周波数が板バネ１８の剛性と磁気回路体１０Ａの質量
による共振系の共振周波数より、低くなるように、なさ
れている。以上のように構成された動電型の電気機械音
響変換器について、以下に動作を説明する。ボイスコイ
ル１３に交流の電気信号が入力されると、ボイスコイル
１３に駆動力が発生し、基板１５を振動させる。また、
上記の駆動力の反力が発生し、磁気回路体１０Ａを振動
させる。負荷質量体１６の重心１６Ａと支点２０間の距
離をＬ１、作用点１９と支点２０間の距離をＬ２とする
と負荷質量体１６の機械変成比はＬ１／Ｌ２で表され
る。機械変成器であるてこ１７は、作用点１９における
みかけの質量を、負荷質量体１６の変成比（Ｌ１／Ｌ
２）の２乗の値を乗算した値に増大させる。ボイスコイ
ル１３に発生する駆動力の反力による磁気回路体１０Ａ
が振動する。この振動によって、支柱１４および基板１
５は、前記の見かけの質量と磁気回路体１０Ａの質量と
板バネ１８のスティフネス（剛性）とで決まる最低共振
周波数で振動する。上記のようにてこ１７を使用するこ
とによって見かけの質量が、実質の質量に対し増大して
いるため、質量に比例する振動レベルはてこ１７を使用
しない場合と比較し、増大する。<< Embodiment 1 >> FIG. 1 is a perspective view of an electromechanical acoustic transducer according to Embodiment 1 of the present invention, and FIG. 2 is a line II-II in FIG.
FIG. 1 and 2, the magnet 1
0, the yokes 11 and 12 form a magnetic circuit. After that, the magnet 10, the yokes 11 and 12
Is called a magnetic circuit body 10A. The yoke 12 is connected to the lever 17 at an action point 19 of the lever 17. At the point of action 19, the magnetic circuit body 1 that generates a vertical driving force by interaction with the voice coil 13 fixed to the substrate 15
The vertical driving force of 0 A is transmitted by the acting body 17A. A leaf spring 18 connected to the column 14 is further connected to the yoke 12. The lower ends of the pillars are joined to the substrate 15. A voice coil 13 is provided on the substrate 15 and is inserted in the magnetic circuit. An arcuate load mass body 16 is provided at one end of each lever 17. An arcuate suspension 21 is provided between the action point 19 of the lever 17 and the column 14. The connecting portion between the suspension 21 and the support 14 is a fixed point that is fixed to the substrate 15 and acts as a fulcrum. Therefore, this portion is called a fulcrum 20. Regarding the rigidity of the lever 17 and the leaf spring 18, the resonance frequency of the resonance system due to the rigidity of the lever 17 and the mass of the magnetic circuit body 10A is lower than the resonance frequency of the resonance system due to the rigidity of the leaf spring 18 and the mass of the magnetic circuit body 10A. So, it is done. The operation of the electrodynamic electromechanical sound transducer configured as described above will be described below. When an alternating electric signal is input to the voice coil 13, a driving force is generated in the voice coil 13 to vibrate the substrate 15. Also,
A reaction force of the above driving force is generated and vibrates the magnetic circuit body 10A. When the distance between the center of gravity 16A of the load mass 16 and the fulcrum 20 is L1, and the distance between the action point 19 and the fulcrum 20 is L2, the mechanical transformation ratio of the load mass 16 is represented by L1 / L2. The lever 17, which is a mechanical transformer, converts the apparent mass at the point of action 19 into the transformation ratio (L1 / L) of the load mass body 16.
Increase to the value obtained by multiplying the squared value of 2). Magnetic circuit body 10A by reaction force of driving force generated in voice coil 13
Vibrates. Due to this vibration, the pillar 14 and the substrate 1
No. 5 vibrates at the lowest resonance frequency determined by the apparent mass, the mass of the magnetic circuit body 10A, and the stiffness of the leaf spring 18. Since the apparent mass is increased with respect to the actual mass by using the lever 17 as described above, the vibration level proportional to the mass is increased as compared with the case where the lever 17 is not used.
【００１３】なお、図１では本発明の電気機械音響変換
器を動電型で実現したが、図３に示すように電磁型で実
現してもよい。図３において、磁気回路体１０Ａに励磁
コイル２２が設けられている。そして基板１５の、磁気
回路体１０Ａに対向する面に鉄片２３が設けられてい
る。その他の構成は図１と同様である。励磁コイル２２
に電気信号が入力されると吸引力が発生し、鉄片２３が
振動するとともに、基板１５が振動する。また磁気回路
体１０Ａ側にも反力が発生して振動する。その他の動作
は図１と同様である。図１の構成では支柱１４に固定さ
れた板バネ１８を用いて磁気回路体１０Ａを支持した
が、図４、５で示すように基板１５の周囲の負荷質量体
１６の存在しない部分に支柱２５を設け、板バネ２６を
用いて磁気回路体１０Ａを支持してよい。また図１ない
し図４ではサスペンション２１は断面形状が半円形のも
のを用いたが、略半円形、楕円形、波形形状のものを用
いてもよい。Although the electromechanical acoustic transducer of the present invention is realized by the electrodynamic type in FIG. 1, it may be realized by the electromagnetic type as shown in FIG. In FIG. 3, an exciting coil 22 is provided in the magnetic circuit body 10A. An iron piece 23 is provided on the surface of the substrate 15 that faces the magnetic circuit body 10A. Other configurations are the same as those in FIG. Excitation coil 22
When an electric signal is input to the, a suction force is generated, the iron piece 23 vibrates, and the substrate 15 vibrates. Also, a reaction force is generated on the magnetic circuit body 10A side and vibrates. Other operations are the same as those in FIG. In the configuration shown in FIG. 1, the magnetic circuit body 10A is supported by using the leaf springs 18 fixed to the support columns 14. However, as shown in FIGS. 4 and 5, the support columns 25 are provided around the substrate 15 where the load mass body 16 does not exist. May be provided and the leaf spring 26 may be used to support the magnetic circuit body 10A. 1 to 4, the suspension 21 has a semicircular cross section, but may have a substantially semicircular, elliptical, or corrugated shape.
【００１４】《実施例２》図６は本発明の実施例２にお
ける電気機械音響変換器の断面図を示している。図６に
おいて、ボイスコイル１３の下端と基板１５間に、外周
部が基板１５に接合され内周部がボイスコイル１３に接
合された振動板３０が設けられている。その他の構成は
図１で示した実施例１と同様である。以上のように構成
された動電型の電気機械音響変換器について、以下、そ
の動作を説明する。ボイスコイル１３に駆動力が発生す
ると、振動板３０を介して基板１５を振動させる。実施
例１と異なるのは、ボイスコイル１３に発生した駆動力
によって振動板３０が振動し、その結果、音を発生させ
ることができる点である。従って実施例２では振動源と
してのみでなく同時に発音源として使用することが可能
である。<Embodiment 2> FIG. 6 is a sectional view of an electromechanical acoustic transducer according to Embodiment 2 of the present invention. In FIG. 6, a diaphragm 30 having an outer peripheral portion bonded to the substrate 15 and an inner peripheral portion bonded to the voice coil 13 is provided between the lower end of the voice coil 13 and the substrate 15. Other configurations are similar to those of the first embodiment shown in FIG. The operation of the electrodynamic electromechanical acoustic transducer configured as described above will be described below. When a driving force is generated in the voice coil 13, the substrate 15 is vibrated via the diaphragm 30. The difference from the first embodiment is that the diaphragm 30 vibrates due to the driving force generated in the voice coil 13, and as a result, sound can be generated. Therefore, the second embodiment can be used not only as a vibration source but also as a sound source at the same time.
【００１５】図６では振動板３０を基板１５の外周部に
固着したが、図７に示すように振動板３１を基板２９の
中央部に固着しても同様の効果が得られる。また図３で
示した電磁型の電気機械音響変換器においても上記のよ
うに構成して発音機能を持たせることができる。図８の
ａおよびｂにそれぞれ、電磁型における発音機能付き電
気機械音響変換器の平面図と断面図を示す。図８におい
て、基板３２は扇形の４個の窓３２Ａを有し、窓３２Ａ
には振動板３３が貼られている。その他の構成は図３と
同様である。Although the vibration plate 30 is fixed to the outer peripheral portion of the substrate 15 in FIG. 6, the same effect can be obtained by fixing the vibration plate 31 to the central portion of the substrate 29 as shown in FIG. The electromagnetic electromechanical sound converter shown in FIG. 3 can also be configured as described above to have a sound producing function. 8A and 8B respectively show a plan view and a cross-sectional view of an electromechanical acoustic transducer with a sound producing function in an electromagnetic type. In FIG. 8, the substrate 32 has four fan-shaped windows 32A.
A diaphragm 33 is attached to the. Other configurations are the same as those in FIG.
【００１６】以下、動作について説明する。励磁コイル
２２に電気信号が入力されると振動板３３に吸引力が発
生し、扇形形状の振動板３３は音を発生する。また、磁
気回路体１０Ａ側にも反力が発生し、磁気回路体１０Ａ
は振動する。その他の動作は図３と同様である。以上の
ように、振動板３３を付加するととともに、基板３２の
形状を変えることにより振動源と発音源の両方を兼ねる
電気機械音響変換器を実現することが可能である。な
お、図６ないし図８の構成では支柱１４に板バネ１８を
用いて磁気回路体１０Ａを支持したが、磁気回路体１０
Ａの周囲に新たに支柱を設け、板バネを用いて磁気回路
を支持しても構わない。（図示省略）
また図６ないし図８の構成ではサスペンション２１は断
面形状が半円形のものを用いたが、略半円形、楕円形、
波形形状のものを用いてもよい。The operation will be described below. When an electric signal is input to the exciting coil 22, an attractive force is generated in the diaphragm 33, and the fan-shaped diaphragm 33 produces a sound. Further, a reaction force is also generated on the magnetic circuit body 10A side, and the magnetic circuit body 10A
Vibrates. Other operations are the same as those in FIG. As described above, by adding the vibration plate 33 and changing the shape of the substrate 32, it is possible to realize an electromechanical acoustic converter that serves as both a vibration source and a sound source. Although the magnetic circuit body 10A is supported by the support springs 14 using the leaf springs 18 in the configurations shown in FIGS.
A column may be newly provided around A and a leaf spring may be used to support the magnetic circuit. (The illustration is omitted.) In the configuration of FIGS. 6 to 8, the suspension 21 has a semicircular cross-section, but a substantially semicircular, elliptical,
A corrugated shape may be used.
【００１７】《実施例３》図９の（ａ）は本発明の実施
例３における電気機械音響変換器の平面図、（ｂ）はｂ
−ｂにおける断面図を示している。図９において、支柱
１４には中心角１２０度で板バネ４２が設けられ、この
板バネ４２によって３カ所で磁気回路体１０Ａが支持さ
れている。さらに支柱１４にはそれぞれのサスペンショ
ン２１を介して３個のてこ４１が中心角１２０度で設け
られている。てこ４１のそれぞれの先端には負荷質量体
１６が設けられている。板バネ４２はてこ４１に対し、
支柱１４を中心として６０度回転した位置にある。その
他の構成は図１で示した実施例１と同じである。以上の
ように構成された動電型の電気機械音響変換器の動作は
実質的に実施例１と同様である。実施例３の特有の効果
は、てこ４１と板バネ４２を放射状にそれぞれ１２０度
間隔で配置したことにより、動作時に、磁気回路体１０
Ａの中心軸と軸１４の中心軸がずれにくくなり、磁気回
路体１０Ａの径方向への変位を防止できる。また基板１
５の変形を抑制することができる。その結果ローリング
（横ゆれ）の起こりにくい変換器を実現することができ
る。なお、図７では動電型を用いたものを示したが、図
２に示した電磁型のものを用いてもよい。<< Embodiment 3 >> FIG. 9A is a plan view of an electromechanical acoustic transducer according to Embodiment 3 of the present invention, and FIG. 9B is b.
The sectional view in -b is shown. In FIG. 9, the support 14 is provided with a leaf spring 42 with a central angle of 120 degrees, and the leaf spring 42 supports the magnetic circuit body 10A at three locations. Further, three levers 41 are provided on the column 14 via respective suspensions 21 at a central angle of 120 degrees. A load mass body 16 is provided at each tip of the lever 41. The leaf spring 42 is
It is in a position rotated by 60 degrees about the column 14. The other structure is the same as that of the first embodiment shown in FIG. The operation of the electrodynamic electromechanical sound transducer configured as described above is substantially the same as that of the first embodiment. The peculiar effect of the third embodiment is that the lever 41 and the leaf springs 42 are radially arranged at intervals of 120 degrees, so that the magnetic circuit body 10 is activated during operation.
The central axis of A and the central axis of the shaft 14 are less likely to be displaced, and the radial displacement of the magnetic circuit body 10A can be prevented. Substrate 1
The deformation of No. 5 can be suppressed. As a result, it is possible to realize a converter in which rolling (lateral shaking) does not easily occur. Although the electrodynamic type is shown in FIG. 7, the electromagnetic type shown in FIG. 2 may be used.
【００１８】《実施例４》図１０は本発明の実施例４に
おける電気機械音響変換器の断面図を示している。図１
０において、てこ５１は一端に負荷質量体１６を有し、
他端は磁気回路体１０Ａに結合されている。てこ５１の
作用点５２支点５３間にはてこ５１を支持する円筒形の
サスペンション５４が設けられている。その他の構成は
図１で示した実施例１と同じである。<< Embodiment 4 >> FIG. 10 is a sectional view of an electromechanical acoustic transducer according to Embodiment 4 of the present invention. Figure 1
At 0, the lever 51 has the load mass 16 at one end,
The other end is coupled to the magnetic circuit body 10A. A cylindrical suspension 54 that supports the lever 51 is provided between the action point 52 and the fulcrum 53 of the lever 51. The other structure is the same as that of the first embodiment shown in FIG.
【００１９】以上のように構成された動電型の電気機械
音響変換器の動作は実質的に実施例１と同様である。実
施例４に特有の効果は、サスペンション５４の形状をて
こ５１の面に対して対称にしたことにより、図１０にお
いて、てこ５１が上下に振動する時のサスペンション５
４の径方向への変形を防ぐことができる。サスペンショ
ン５４の形状が径方向に変化しないので、負荷質量体１
６および磁気回路体１０Ａが径方向に動くことはなく、
ローリングの起こりにくい変換器を実現することができ
る。サスペンション５４の部分のみをこのように変更し
ても、変換器全体の重量増加はほとんどない。なお、図
１０ではサスペンション５４の形状として円筒形のもの
を用いたが、略円筒形、楕円筒形、波形の筒型形状を用
いてもよい（図示省略）。The operation of the electrodynamic electromechanical acoustic transducer configured as described above is substantially the same as that of the first embodiment. The effect peculiar to the fourth embodiment is that the shape of the suspension 54 is symmetrical with respect to the surface of the lever 51, so that the suspension 5 when the lever 51 vibrates vertically in FIG.
4 can be prevented from being deformed in the radial direction. Since the shape of the suspension 54 does not change in the radial direction, the load mass 1
6 and the magnetic circuit body 10A do not move in the radial direction,
It is possible to realize a converter in which rolling does not easily occur. Even if only the suspension 54 is changed in this way, there is almost no increase in the weight of the entire transducer. Although the suspension 54 has a cylindrical shape in FIG. 10, it may have a substantially cylindrical shape, an elliptic cylindrical shape, or a corrugated cylindrical shape (not shown).
【００２０】《実施例５》図１１は本発明のの電気機械
音響変換器の駆動装置のブロック図を示している。図１
１において、電気信号発生装置５６の出力が実施例１な
いし４で示した電気機械音響変換器５７に入力される。
電気機械音響変換器５７を動作させるための電気信号が
電気信号発生装置５６の入力端子５５に入力されると、
電気信号発生装置５６は所定の周波数幅をもって変動す
る交流信号を電気機械音響変換器５７に対して出力す
る。電気機械音響変換器５７は共振が鋭いため固有の共
振周波数において最も効率よく入力信号を振動に変換す
る。入力周波数が共振周波数からずれると、変換効率に
悪い影響をおよぼす。そこで電気信号発生装置５６は、
図１２に示すように中心周波数ｆを中心として所定の周
波数幅Ｆの範囲の周波数が混合された信号を出力するよ
うに構成されている。このようにすると、以下に示す効
果が得られる。<Embodiment 5> FIG. 11 is a block diagram of a driving device for an electromechanical sound converter according to the present invention. Figure 1
1, the output of the electric signal generator 56 is input to the electromechanical acoustic converter 57 shown in the first to fourth embodiments.
When an electric signal for operating the electromechanical sound converter 57 is input to the input terminal 55 of the electric signal generator 56,
The electric signal generator 56 outputs an alternating signal that fluctuates with a predetermined frequency width to the electromechanical acoustic converter 57. Since the electromechanical acoustic converter 57 has a sharp resonance, it most efficiently converts an input signal into vibration at a natural resonance frequency. If the input frequency deviates from the resonance frequency, the conversion efficiency will be adversely affected. Therefore, the electric signal generator 56
As shown in FIG. 12, it is configured to output a signal in which frequencies within a predetermined frequency width F are mixed around the center frequency f. By doing so, the following effects can be obtained.
【００２１】本発明の電気機械音響変換器を大量生産し
た場合に、個々の電気機械音響変換器の共振周波数が多
少ばらつくのは避けられない。この共振周波数のばらつ
きが前記の周波数幅Ｆ内に入るように周波数幅Ｆを設定
しておけば、生産された全ての電気機械音響変換器の共
振周波数が入力信号中に含まれるので、どの電気機械音
響変換器も高い効率で入力信号を振動に変換できる。他
の方法による入力信号の波形を図１３に示す。図１３に
おいて、入力信号の周波数を、中心周波数ｆの高い方と
低い方のそれぞれ所定の周波数の範囲で時間的に変化さ
せる。その結果入力信号の周波数が電気機械音響変換器
の固有の共振周波数に一致したときに電気機械音響変換
器は最も強く振動する。本発明の電気機械音響変換器に
おける振動の周波数は１００Ｈｚ近傍の低周波である。
これに対して実施例２における音の周波数は２５００Ｈ
ｚ近傍の高周波である。このように両周波数は大幅に異
なっているので、入力信号の周波数を低周波とすること
により振動のみを発生させ、高周波とすることにより音
のみを発生させることができる。以上のように、入力信
号の周波数を低周波又は高周波のいずれかに切り換える
ことにより振動又は音のいずれかを選択することができ
る。また低周波と高周波の両信号を同時に入力すれば振
動と音の両方を発生させることができる。従って変換効
率の安定した振動を実現することができるとともに使用
上便利な電気機械音響変換器が実現できる。When the electromechanical sound transducer of the present invention is mass-produced, it is inevitable that the resonance frequencies of the individual electromechanical sound transducers vary to some extent. If the frequency width F is set so that the variation of the resonance frequency falls within the above-mentioned frequency width F, the resonance frequencies of all the electromechanical acoustic transducers produced are included in the input signal, so that The mechanical acoustic transducer can also convert the input signal into vibration with high efficiency. The waveform of the input signal obtained by another method is shown in FIG. In FIG. 13, the frequency of the input signal is temporally changed within a range of a predetermined frequency of high frequency and a frequency of low center frequency f. As a result, the electromechanical sound transducer vibrates most strongly when the frequency of the input signal matches the inherent resonant frequency of the electromechanical sound transducer. The frequency of vibration in the electromechanical acoustic transducer of the present invention is a low frequency near 100 Hz.
On the other hand, the frequency of the sound in the second embodiment is 2500H.
It is a high frequency near z. Since the two frequencies are significantly different from each other as described above, only the vibration can be generated by setting the frequency of the input signal to the low frequency, and only the sound can be generated by setting the frequency to the high frequency. As described above, it is possible to select either vibration or sound by switching the frequency of the input signal to either low frequency or high frequency. Further, if both low frequency and high frequency signals are input at the same time, both vibration and sound can be generated. Therefore, it is possible to realize a vibration with stable conversion efficiency and an electromechanical acoustic converter which is convenient to use.
【００２２】《実施例６》図１４は本発明の電気機械音
響変換器を備えた携帯端末装置の部分破断図を示してい
る。図１４において、例えば携帯電話の筐体６１の内部
に実施例１ないし４で示した電気機械音響変換器６２と
実施例５で示した電気信号発生装置５６（図示省略）が
設けられている。以上のように構成された携帯端末装置
について、以下、その動作を説明する。携帯電話が図示
を省略した回路により呼び出し信号を受信すると電気機
械音響変換器６２に電気信号が入力され、入力信号の周
波数が電気機械音響変換器６２の共振周波数帯域であれ
ば振動し、その振動により筐体６１が振動する。発音機
能を持つ電気機械音響変換器６２であれば振動と同時に
音を発生させることができる。<Embodiment 6> FIG. 14 is a partial cutaway view of a portable terminal device equipped with the electromechanical acoustic transducer of the present invention. In FIG. 14, for example, the electromechanical acoustic converter 62 shown in the first to fourth embodiments and the electric signal generator 56 (not shown) shown in the fifth embodiment are provided inside a housing 61 of a mobile phone. The operation of the mobile terminal device configured as described above will be described below. When the mobile phone receives a call signal by a circuit (not shown), an electric signal is input to the electromechanical sound converter 62, and if the frequency of the input signal is the resonance frequency band of the electromechanical sound converter 62, the vibrator vibrates. This causes the housing 61 to vibrate. The electromechanical sound converter 62 having a sounding function can generate sound at the same time as vibration.
【００２３】上記動作による振動と発音によって、着信
を携帯電話の使用者に伝える。入力信号の周波数を変化
させることで振動のみ、発音のみ、振動と発音の両方の
信号の伝達手段を選択することが可能であるので、従来
は個別の部品によって実現されていた振動と発音の機能
を一体にすることができ携帯電話の小型化、軽量化、低
コスト化が可能となる。なお、図１４では電気機械音響
変換器６２を直接筐体６１に取り付けたが、携帯電話に
内蔵されている図示を省略した基盤に取り付け、基盤を
介して振動を筐体に伝達してもよい。また携帯端末装置
として携帯電話を例に説明したが、その他の携帯端末装
置についても同様に実施可能である。An incoming call is transmitted to the user of the mobile phone by the vibration and sound produced by the above operation. By changing the frequency of the input signal, it is possible to select only vibration, only sound generation, or both vibration and sound signal transmission means, so the vibration and sound functions that were conventionally realized by individual parts It becomes possible to make the mobile phone smaller, lighter, and lower in cost. Although the electromechanical acoustic transducer 62 is directly attached to the housing 61 in FIG. 14, it may be attached to a base (not shown) built in the mobile phone and vibration is transmitted to the housing via the base. . Although the mobile phone has been described as an example of the mobile terminal device, other mobile terminal devices can be similarly implemented.
【００２４】[0024]
【発明の効果】本発明によれば、二次側機械インピーダ
ンスと作用点部間の距離と作用点部支点部との間の距離
で構成される機械変成比によって一次側からみた二次側
の機械インピーダンスが変換される少なくとも１つの機
械変成器の支点部を、基板部に結合する。また、機械変
成器の一次側に結合され且つ基板部に少なくとも１つ以
上の支持系で結合されたところの、電気信号を機械振動
に変換する電気機械変換器を設ける。この構成で、電気
機械音響変換器の総重量を増やすことなく、レベルの大
きい振動を取り出すことが可能である。さらに、電気機
械変成器に結合し、機械信号を音響信号に変換し音とし
て出力する機械音響変換器を設けることで振動と同時に
発音も可能な電気機械音響変換器を実現できる。また、
３個のてこをそれぞれのサスペンションを介して支柱に
結合し、中心角１２０℃で放射状に配置された板ばねに
よって磁気回路体を支持したものでは、ローリングの起
こりにくい電気機械音響変換器を実現できる。本発明の
電気機械音響変換器は小型かつ軽量であるので、これを
内蔵した携帯端末装置の小型化、軽量化が実現される。
また振動と同時に音を発生することもできる電気機械音
響変換器を内蔵した携帯端末装置では、さらなる部品の
追加なしで、振動と音を発生することができる。According to the present invention, the secondary side viewed from the primary side by the mechanical transformation ratio constituted by the mechanical impedance of the secondary side, the distance between the action point portions and the distance between the action point portion fulcrum portion. A fulcrum section of at least one mechanical transformer whose mechanical impedance is transformed is coupled to the substrate section. There is also provided an electromechanical converter coupled to the primary side of the mechanical transformer and coupled to the substrate portion with at least one support system for converting electrical signals into mechanical vibrations. With this configuration, it is possible to take out a high level vibration without increasing the total weight of the electromechanical acoustic transducer. Furthermore, by providing a mechanical-acoustic transducer that is coupled to the electromechanical transformer and converts a mechanical signal into an acoustic signal and outputs it as sound, an electromechanical acoustic converter capable of vibrating and sounding at the same time can be realized. Also,
An electromechanical sound transducer that is less likely to roll can be realized by connecting three levers to the support column via each suspension and supporting the magnetic circuit body by leaf springs radially arranged at a central angle of 120 ° C. . Since the electromechanical acoustic transducer of the present invention is small and lightweight, the portable terminal device incorporating the electromechanical transducer can be made compact and lightweight.
In addition, in a mobile terminal device having a built-in electromechanical acoustic converter that can generate sound at the same time as vibration, vibration and sound can be generated without adding additional parts.
【図１】本発明の実施例１における動電型の電気機械音
響変換器の斜視図FIG. 1 is a perspective view of an electrodynamic electromechanical acoustic transducer according to a first embodiment of the present invention.
【図２】図１のII−II断面図FIG. 2 is a sectional view taken along line II-II of FIG.
【図３】本発明の実施例１における電磁型の電気機械音
響変換器の断面図FIG. 3 is a cross-sectional view of an electromagnetic electromechanical sound transducer according to the first embodiment of the present invention.
【図４】本発明の実施例１における動電型の電気機械音
響変換器の板バネの形状の異なるものの斜視図FIG. 4 is a perspective view of an electrodynamic electromechanical acoustic transducer according to a first embodiment of the present invention having different leaf spring shapes.
【図５】図４のＶ−Ｖ断面図5 is a sectional view taken along line VV of FIG.
【図６】本発明の実施例２における動電型の電気機械音
響変換器の断面図FIG. 6 is a sectional view of an electrodynamic electromechanical transducer according to a second embodiment of the present invention.
【図７】本発明の実施例２における動電型の電気機械音
響変換器の振動板の形状の異なるものの断面図FIG. 7 is a cross-sectional view of an electrodynamic electromechanical acoustic transducer according to a second embodiment of the present invention having different diaphragm shapes.
【図８】（ａ）は本発明の実施例２における電磁型の電
気機械音響変換器の平面図
（ｂ）は（ａ）のｂ−ｂ断面図FIG. 8A is a plan view of an electromagnetic electromechanical transducer according to a second embodiment of the present invention, and FIG. 8B is a sectional view taken along line bb of FIG. 8A.
【図９】（ａ）は本発明の実施例３における電気機械音
響変換器の平面図
（ｂ）は（ａ）のｂ−ｂ断面図9A is a plan view of an electromechanical acoustic transducer according to a third embodiment of the present invention, and FIG. 9B is a sectional view taken along line bb of FIG. 9A.
【図１０】本発明の実施例４における動電型の電気機械
音響変換器の断面図FIG. 10 is a sectional view of an electrodynamic electromechanical transducer according to a fourth embodiment of the present invention.
【図１１】本発明の電気機械音響変換器を駆動する電気
信号発生装置のブロック図FIG. 11 is a block diagram of an electric signal generator for driving the electromechanical acoustic transducer of the present invention.
【図１２】図１１に示す電気信号発生装置の出力信号の
一例を示す図12 is a diagram showing an example of an output signal of the electric signal generator shown in FIG.
【図１３】図１１に示す電気信号発生装置の出力信号の
他の例を示す波形図13 is a waveform chart showing another example of the output signal of the electric signal generator shown in FIG.
【図１４】本発明の電気機械音響変換器を組み込んだ携
帯電話の部分破断図FIG. 14 is a partial cutaway view of a mobile phone incorporating the electromechanical sound transducer of the present invention.
【図１５】従来の電気機械音響変換器の断面図FIG. 15 is a sectional view of a conventional electromechanical acoustic transducer.
１０ マグネット １１ ヨーク １２ ヨーク １３ ボイスコイル １４ 支柱 １５ 基板 １６ 負荷質量体 １７ てこ １８ 板バネ １９ てこの作用点 ２０ てこの支点 ２１ サスペンション ２３ 振動板 ３２ 基板 ３３ 振動板 ４１ てこ ４２ 板バネ ５４ サスペンション 10 magnets 11 York 12 York 13 voice coil 14 props 15 substrates 16 Load mass 17 Lever 18 leaf spring 19 Leverage points 20 Lever fulcrum 21 suspension 23 diaphragm 32 substrates 33 diaphragm 41 Lever 42 leaf spring 54 suspension
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平８−79890（ＪＰ，Ａ) 特開 平５−85192（ＪＰ，Ａ) 特開 平５−48447（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H04M 1/02 H04R 13/02 B06B 1/04 G10K 9/12 G10K 9/13 102 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-79890 (JP, A) JP-A-5-85192 (JP, A) JP-A-5-48447 (JP, A) (58) Field (Int.Cl. 7 , DB name) H04M 1/02 H04R 13/02 B06B 1/04 G10K 9/12 G10K 9/13 102
Claims (17)
部と二次側機械インピーダンスの重心との間の距離の比
で表される機械変成比によって、駆動側である一次側か
らみた前記二次側機械インピーダンスが変換される少な
くとも１つの機械変成器と、 前記機械変成器の支点部に結合した基板部と、 前記機械変成器の一次側に結合され、前記基板部に少な
くとも１つ以上の支持系で結合され、電気信号を機械振
動に変換する前記駆動手段としての電気機械変換器とを
有する電気機械音響変換器。1. A primary side, which is a drive side, based on a mechanical transformation ratio represented by a ratio of a distance between the action point portion and the fulcrum portion and a distance between the fulcrum portion and the center of gravity of the secondary side mechanical impedance. At least one mechanical transformer that converts the secondary side mechanical impedance viewed from above, a substrate portion coupled to a fulcrum portion of the mechanical transformer, a primary side of the mechanical transformer, and at least the substrate portion. An electromechanical acoustic transducer having one or more support systems and an electromechanical transducer as the driving means for converting an electric signal into mechanical vibration.
による信号を音響信号に変換し音として出力する機械音
響変換器を有する請求項１記載の電気機械音響変換器。2. The electromechanical acoustic transducer according to claim 1, further comprising a mechanical acoustic transducer that is coupled to the electromechanical transducer and that converts a signal due to mechanical vibration into an acoustic signal and outputs the acoustic signal as sound.
磁気回路部を有し、前記磁気回路部の磁気ギャップ中に
挿入された励振コイルの一端を前記基板部に結合した請
求項１記載の電気機械音響変換器。3. The electromechanical converter has a magnetic circuit section of an electrokinetic converter, and one end of an exciting coil inserted in a magnetic gap of the magnetic circuit section is coupled to the substrate section. 1. The electromechanical acoustic transducer according to 1.
気回路部を有し、前記磁気回路部の磁気ギャップ中に挿
入された励振コイルの一端に機械音響変換器である振動
板を結合した請求項２記載の電気機械音響変換器。4. The electromechanical converter has a magnetic circuit section of an electrodynamic converter, and a vibration plate which is a mechanical acoustic converter is provided at one end of an exciting coil inserted in a magnetic gap of the magnetic circuit section. An electromechanical acoustic transducer according to claim 2, which is coupled.
気回路部を有し、前記磁気回路部と空隙を設けて対向配
置した強磁性体の振動板の少なくとも一部を基板部に結
合した請求項１記載の電気機械音響変換器。5. The electromechanical converter has a magnetic circuit part of an electromagnetic type converter, and at least a part of a ferromagnetic vibrating plate disposed opposite to the magnetic circuit part with a gap is coupled to a substrate part. The electromechanical acoustic transducer according to claim 1.
気回路部を有し、前記磁気回路部と空隙を設けて対向配
置した強磁性体の振動板の少なくとも一部を基板部に結
合し、また少なくとも一部を機械音響変換器である振動
板として機能させる請求項２記載の電気機械音響変換
器。6. The electromechanical converter has a magnetic circuit unit of an electromagnetic converter, and at least a part of a ferromagnetic diaphragm disposed opposite to the magnetic circuit unit with a gap is coupled to a substrate unit. The electromechanical acoustic transducer according to claim 2, wherein at least a part of the electromechanical acoustic transducer functions as a diaphragm that is a mechanical acoustic transducer.
ダンスが、前記機械変成器の一部に結合した負荷質量で
ある請求項３、４、５、６のいずれかに記載の電気機械
音響変換器。7. The electromechanical sound according to claim 3, wherein the mechanical impedance on the secondary side of the mechanical transformer is a load mass coupled to a part of the mechanical transformer. converter.
を支持した請求項３、４、５、６のいずれかに記載の電
気機械音響変換器。8. The electromechanical acoustic transducer according to claim 3, wherein the electromechanical transducer is supported at a central portion of the substrate portion.
を支持した請求項３、４、５、６のいずれかに記載の電
気機械音響変換器。9. The electromechanical acoustic transducer according to claim 3, wherein the electromechanical transducer is supported in the peripheral portion of the substrate portion.
基板部と結合した請求項３、４、５、６のいずれかに記
載の電気機械音響変換器。10. The electromechanical sound transducer according to claim 3, wherein the mechanical transformer is coupled to the substrate portion via a suspension.
振動の方向に垂直な面に対称な形状とした請求項１０記
載の電気機械音響変換器。11. The electromechanical acoustic transducer according to claim 10, wherein the shape of the suspension is symmetrical with respect to a plane perpendicular to the vibration direction of the mechanical transformer.
それぞれ中心部に対し相対する位置に１組以上配し、電
気機械変換器と結合した請求項１または２記載の電気機
械音響変換器。12. A mechanical transformer and support system of the same type,
The electromechanical acoustic transducer according to claim 1 or 2, wherein one or more sets are arranged at positions facing each other with respect to the central portion, and the electromechanical transducers are combined with the electromechanical transducer.
対する位置に１組以上配し、電気機械変換器と結合した
請求項１または２記載の電気機械音響変換器。13. The electromechanical acoustic transducer according to claim 1, wherein one or more sets of the mechanical transformer and the support system are arranged at positions facing each other with respect to the center portion, and the electromechanical transducer is connected to the electromechanical transducer.
による共振系の共振周波数に対し、機械変成器の剛性と
電気機械変換器の質量による共振系の共振周波数が低い
ことを特徴とする請求項１または２記載の電気機械音響
変換器。14. The resonance frequency of the resonance system due to the rigidity of the mechanical transformer and the mass of the electromechanical converter is lower than the resonance frequency of the resonance system due to the rigidity of the support system and the mass of the electromechanical converter. The electromechanical acoustic transducer according to claim 1.
する電気信号発生装置を有する請求項１または２記載の
電気機械音響変換器。15. The electromechanical acoustic transducer according to claim 1, further comprising an electric signal generator that generates a signal having a predetermined frequency bandwidth.
点部と二次側機械インピーダンスの重心との間の距離の
比で表される機械変成比によって、駆動手段である一次
側からみた前記二次側機械インピーダンスが変換される
少なくとも１つの機械変成器と、 前記機械変成器の支点部に結合した基板部と、 前記機械変成器の一次側に結合され、前記基板部に少な
くとも１つ以上の支持系で結合された、電気信号を機械
振動に変換する前記駆動手段としての電気機械変換器と
を有する電気機械音響変換器を内蔵し、電気信号が入力
されると筐体が振動するように構成した携帯端末装置。16. A primary side, which is a driving means, by a mechanical transformation ratio represented by a ratio of a distance between the fulcrum portion and the fulcrum portion and a distance between the fulcrum portion and the center of gravity of the secondary side mechanical impedance. At least one mechanical transformer that converts the secondary side mechanical impedance viewed from above, a substrate portion coupled to a fulcrum portion of the mechanical transformer, a primary side of the mechanical transformer, and at least the substrate portion. An electromechanical sound transducer having an electromechanical transducer, which is coupled with one or more support systems and has the electromechanical transducer as the driving means for converting an electric signal into mechanical vibration, is incorporated, and when the electric signal is input, the housing is A mobile terminal device configured to vibrate.
点部と二次側機械インピーダンスの重心との間の距離の
比で表される機械変成比によって、駆動手段である一次
側からみた前記二次側機械インピーダンスが変換される
少なくとも１つの機械変成器と、 前記機械変成器の支点部に結合した基板部と、 前記機械変成器の一次側に結合され、前記基板部に少な
くとも１つ以上の支持系で結合された、電気信号を機械
振動に変換する前記駆動手段としての電気機械変換器と
を有する電気機械音響変換器に結合し、機械振動による
信号を音響信号に変換し音として出力する機械音響変換
器を有する電気機械音響変換器を内蔵し、電気信号が入
力されると筐体が振動または発音あるいは振動かつ発音
するように構成した携帯端末装置。17. A primary side, which is a driving means, by a mechanical transformation ratio represented by a ratio of a distance between the fulcrum portion and the fulcrum portion and a distance between the fulcrum portion and the center of gravity of the secondary side mechanical impedance. At least one mechanical transformer that converts the secondary side mechanical impedance viewed from above, a substrate portion coupled to a fulcrum portion of the mechanical transformer, a primary side of the mechanical transformer, and at least the substrate portion. Coupled to an electromechanical acoustic transducer having one or more supporting systems and having an electromechanical transducer as the driving means for converting an electrical signal into mechanical vibration, the mechanical vibration signal is converted into an acoustic signal. A mobile terminal device having a built-in electromechanical sound transducer having a mechanical sound transducer that outputs a sound, and configured such that when an electric signal is input, the housing vibrates or sounds or vibrates and sounds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21379496A JP3529559B2 (en) | 1996-08-13 | 1996-08-13 | Electromechanical sound transducer and portable terminal device using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21379496A JP3529559B2 (en) | 1996-08-13 | 1996-08-13 | Electromechanical sound transducer and portable terminal device using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1066194A JPH1066194A (en) | 1998-03-06 |
| JP3529559B2 true JP3529559B2 (en) | 2004-05-24 |
Family
ID=16645167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21379496A Expired - Fee Related JP3529559B2 (en) | 1996-08-13 | 1996-08-13 | Electromechanical sound transducer and portable terminal device using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3529559B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100317743B1 (en) * | 1999-12-10 | 2001-12-24 | 송재인 | producing system of vibration and sound |
| JP3830022B2 (en) * | 2000-12-15 | 2006-10-04 | シチズン電子株式会社 | Multi-functional pronunciation body |
| JP4841744B2 (en) * | 2001-05-16 | 2011-12-21 | シコー株式会社 | Electromagnetic actuator |
| JP2004261684A (en) | 2003-02-28 | 2004-09-24 | Citizen Electronics Co Ltd | Vibrator and its manufacturing method |
| CA2997902A1 (en) | 2015-09-14 | 2017-03-23 | Wing Acoustics Limited | Improvements in or relating to audio transducers |
| WO2018167538A1 (en) | 2017-03-15 | 2018-09-20 | Wing Acoustics Limited | Improvements in or relating to audio systems |
| US11137803B2 (en) | 2017-03-22 | 2021-10-05 | Wing Acoustics Limited | Slim electronic devices and audio transducers incorporated therein |
| US10462574B1 (en) * | 2018-11-30 | 2019-10-29 | Google Llc | Reinforced actuators for distributed mode loudspeakers |
-
1996
- 1996-08-13 JP JP21379496A patent/JP3529559B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1066194A (en) | 1998-03-06 |
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