JPH09261917A - Vibrating actuator for pager - Google Patents
Vibrating actuator for pagerInfo
- Publication number
- JPH09261917A JPH09261917A JP8069523A JP6952396A JPH09261917A JP H09261917 A JPH09261917 A JP H09261917A JP 8069523 A JP8069523 A JP 8069523A JP 6952396 A JP6952396 A JP 6952396A JP H09261917 A JPH09261917 A JP H09261917A
- Authority
- JP
- Japan
- Prior art keywords
- vibrating body
- section
- coil
- vibration
- crashed
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、携帯用電話機等に
内装され、信号着信時の呼び出しを音声だけでなく、振
動によっても知らしめるために利用するものであり、特
に小型で軽量にする目的で用いることができる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a portable telephone or the like to notify a call at the time of a signal arrival not only by voice but also by vibration. Can be used.
【０００２】[0002]
【従来の技術】従来のペイジャー用振動アクチュエータ
は、ペイジャー用振動モーターや振動発生アクチュエー
タとも称せられ、小型で薄く、低消費電力で振動を発生
でき、安価であることが必要である。しかし振動発生の
みを目的とするために、当然ながら音声で呼び出しをし
たり、会話音を発することができない。従って、着信情
報や音声発生のために少なくとも２個以上の装置部品が
必要になる。また多く使用されているペイジャー用振動
アクチュエータは、比較的大きい質量を回転させるため
に起動電力消費が大きい。さらに回転させる構成のため
に部品点数が多くなったり、信頼性や精度管理に問題が
ある。直流電流を用いる理由で電流切り替え用の刷子を
持つため、回転に際して動作不良を起こすこともあり、
また小型、扁平化にも限界を有する。2. Description of the Related Art A conventional pager vibration actuator is also called a pager vibration motor or a vibration generation actuator, and needs to be small, thin, capable of generating vibration with low power consumption, and inexpensive. However, since the purpose is to generate only vibration, it is naturally impossible to make a voice call or generate a conversation sound. Therefore, at least two or more device parts are required for incoming information and voice generation. In addition, the vibration actuator for pager, which is often used, consumes a large amount of starting power because it rotates a relatively large mass. Further, the number of parts is increased due to the configuration of rotation, and there are problems in reliability and accuracy control. Because it has a brush for current switching because it uses DC current, it may cause malfunctions during rotation,
Also, there are limits to miniaturization and flattening.
【０００３】図４は従来最も普通に使用されているペイ
ジャー用振動モーターを示すものである。円筒形のコア
レスロータで構成された駆動モータ２２で駆動されるシ
ャフト２３を介してカウンタウェイト２４が回転し、振
れ回り振動を発生させる。当然ながら振動以外の音声を
発生することはできない。駆動モータ２２は曲面形状の
永久磁石、円筒形状のコアレスロータで形成され、また
回転駆動力を得るには複数の磁極を形成する必要があ
り、細い径の駆動モータ２２を実現するためには精度管
理や製作コストで限界がある。またコアレスロータに印
加した駆動電流が外部への振動エネルギーとして有効に
利用することにも限界がある。FIG. 4 shows the most commonly used vibration motor for a pager. The counterweight 24 rotates via a shaft 23 driven by a drive motor 22 composed of a cylindrical coreless rotor, and generates whirling vibration. Of course, it is not possible to generate sounds other than vibration. The drive motor 22 is formed of a curved permanent magnet and a cylindrical coreless rotor, and it is necessary to form a plurality of magnetic poles to obtain a rotational driving force. There are limits in management and production costs. There is also a limit to how effectively the drive current applied to the coreless rotor can be used as vibration energy to the outside.
【０００４】図５は従来の扁平形コアレスロータで構成
されたペイジャー用振動モータ２５の内部を示す斜視図
である。回転軸２８に重心を偏心させた円板状の巻線コ
イル２６を設け、薄板状の永久磁石２７との間で回転駆
動力を発生させる。駆動電流は刷子２９から供給され
る。円筒型のものと異なり、カウンタウェイトのかわり
に、重心を偏心させた巻線コイル２６を利用している。
回転の際に振動が発生する。当然ながら音声を出すこと
はできない。また２０ｍｍ以下の外形で数ｍｍ以下の扁
平な形状にすることは難しい。そして駆動電流を振動エ
ネルギーに有効利用できる限界もある。FIG. 5 is a perspective view showing the inside of a vibration motor 25 for a pager, which is composed of a conventional flat coreless rotor. A disk-shaped winding coil 26 having an eccentric center of gravity is provided on a rotary shaft 28, and a rotary driving force is generated between the rotary coil 28 and a permanent magnet 27 having a thin plate shape. The drive current is supplied from the brush 29. Unlike the cylindrical type, instead of the counter weight, a winding coil 26 having an eccentric center of gravity is used.
Vibration occurs during rotation. Of course, you can't speak. Further, it is difficult to make the outer shape of 20 mm or less and the flat shape of several mm or less. There is also a limit to the effective use of drive current for vibration energy.
【０００５】[0005]
【発明が解決しようとする課題】従来のペイジャー用振
動アクチュエータでは振動を発生させることはできるが
音声を発生させることはできなかった。また起動電力を
必ずしも小さくできず、外形寸法を小さくするにはかな
り無理があり、また回転動作不良も起きやすいものもあ
った。The conventional vibration actuator for a pager can generate vibration but cannot generate sound. In addition, the starting power cannot always be reduced, and it is quite difficult to reduce the external dimensions, and there are some cases where defective rotation operation easily occurs.
【０００６】本発明は振動と音声を発生させることがで
き、駆動電流を有効に振動エネルギーに変換できるペイ
ジャー用振動アクチュエータを得ることを目的とし、作
りやすく、扁平化しやすく、動作不良の少ないペイジャ
ー用振動アクチュエータを提供することを目的としてい
る。An object of the present invention is to obtain a vibration actuator for a pager which can generate vibration and sound and which can effectively convert a driving current into vibrational energy. It is intended to provide a vibration actuator.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、本発明のペイジャー用振動アクチュエータにおいて
は、従来は音声発生に使用されるムービングコイル型の
電気音響変換器の上下に振動する振動体を、近接して固
定した部分に衝突させ外部に振動を発生させる。In order to achieve the above object, in a vibration actuator for a pager according to the present invention, a vibrating body vibrating up and down of a moving coil type electroacoustic transducer conventionally used for sound generation. Is caused to collide with a portion fixed in proximity to generate vibration to the outside.
【０００８】また、電気音響変換装置の振動体に近接し
て、樹脂材料で成形された衝突部を設け電気音響変換器
の外枠に固定する。Further, a collision portion formed of a resin material is provided near the vibrating body of the electroacoustic transducer and is fixed to the outer frame of the electroacoustic transducer.
【０００９】また、衝突部を円環状に形成して、ムービ
ングコイル型のコイルの径とほぼ同じ大きさにし、振動
体の衝突を構造強度の強い部分で分散させる。Further, the collision portion is formed in an annular shape to have a diameter substantially equal to the diameter of the moving coil type coil, and the collision of the vibrating body is dispersed in the portion having high structural strength.
【００１０】また、振動体の中央部をドーム形状にし、
さらにはドーム形状の内壁面に複数のリブを設け構造強
度をあげ、ダンパとの接着部分は円環状の平坦部にす
る。Further, the central portion of the vibrating body is formed into a dome shape,
Furthermore, a plurality of ribs are provided on the inner wall surface of the dome shape to increase the structural strength, and the portion to be bonded to the damper is formed into an annular flat portion.
【００１１】そして、ドーム形状の部分、円環状平坦部
やボビンを樹脂で一体成形で形成する。リブを有する場
合も一体成形で形成する。円環状平坦部の外径をボビン
の径よりも大きい径にする。Then, the dome-shaped portion, the annular flat portion and the bobbin are integrally formed of resin. Even if it has ribs, it is formed by integral molding. The outer diameter of the annular flat portion is larger than the diameter of the bobbin.
【００１２】さらに、ゴム等の弾性材料で円環状に成形
したダンパを振動体周辺の円環状平坦部に接着する。Further, an annular damper made of an elastic material such as rubber is adhered to the annular flat portion around the vibrating body.
【００１３】円環状の衝突部は金属板で成形した凸部を
用いてもよい。この金属板のキャップには複数の孔を設
ける。As the annular collision portion, a convex portion formed of a metal plate may be used. The cap of this metal plate is provided with a plurality of holes.
【００１４】[0014]
【発明の実施の形態】発明の実施の形態を実施例をもと
に図面を参照して説明する。図１は本発明によるペイジ
ャー用振動アクチュエータの実施例を示すもので、音声
を発生するムービングコイル型の電気音響変換器を用い
ている。振動体１はドーム形状に成形し、振動時に屈曲
しにくくし、良い音声を発生できるものにしている。振
動体１の中心位置と上下の位置を支持するため、上下方
向に比較的柔らかく変位できるダンパ７が接着され、支
持枠１１で支持される。また複数回導体細線を巻いた円
筒状のコイル３はボビン９の外周に形成される。ボビン
９は振動体１、円環状平坦部８とともに樹脂の一体成形
で連続した構造体として形成される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples with reference to the drawings. FIG. 1 shows an embodiment of a vibration actuator for a pager according to the present invention, which uses a moving coil type electroacoustic transducer for generating a sound. The vibrating body 1 is formed in a dome shape so that it is difficult to bend when vibrating, and good sound can be generated. In order to support the center position and the upper and lower positions of the vibrating body 1, a damper 7 that can be displaced relatively softly in the vertical direction is bonded and supported by a support frame 11. Further, the cylindrical coil 3 in which the thin conductor wire is wound plural times is formed on the outer circumference of the bobbin 9. The bobbin 9 is formed as a continuous structure by integrally molding a resin together with the vibrating body 1 and the annular flat portion 8.
【００１５】磁気回路は、中央に孔の開いた柱状で厚さ
方向に着磁された永久磁石４の片方の磁極に円板状磁性
体のプレート６を接着し、他方の磁極には成形加工され
た磁性板のヨーク５を接着して構成される。ヨーク５と
プレート６の間にはコイル３やボビン９が上下に動く円
環状のギャップが形成され、磁束密度の大きい空間にな
る。音声の場合は数百ヘルツから３キロヘルツと周波数
が高く、比較的大きい駆動電流がコイル３に入っても振
動体１の変位量が比較的小さく、衝突部２に当たらない
位置にダンパ７で支持する。低周波数で駆動する場合
は、振動体１の変位が大きくなるため衝突部２に衝突す
る。衝突部２に衝突する円環状平坦部８は構造的に丈夫
で平均的に衝突する。衝突で生じた振動は支持梁１２を
伝わり、外周部１０からさらに外部に伝搬していく。振
動体１やダンパ７が低周波数で振動するときの空気の背
圧を上げないために、プレート６には中央の孔１３が、
ヨーク５には複数の孔１４が設けられる。断面構造は図
２で示される。In the magnetic circuit, a disc-shaped magnetic plate 6 is bonded to one magnetic pole of a permanent magnet 4 which is columnar with a hole in the center and is magnetized in the thickness direction, and the other magnetic pole is molded. The yoke 5 of the magnetic plate thus formed is bonded and configured. An annular gap, in which the coil 3 and the bobbin 9 move up and down, is formed between the yoke 5 and the plate 6 to provide a space with a high magnetic flux density. In the case of voice, the frequency is as high as several hundreds of hertz to 3 kilohertz, and the displacement amount of the vibrating body 1 is relatively small even when a relatively large drive current enters the coil 3, and the damper 7 supports it at a position where it does not hit the collision part 2. To do. When driving at a low frequency, the displacement of the vibrating body 1 increases, and the vibrating body 1 collides with the colliding portion 2. The annular flat portion 8 that collides with the colliding portion 2 is structurally strong and collides on average. The vibration generated by the collision propagates through the support beam 12 and further propagates from the outer peripheral portion 10 to the outside. In order to prevent the back pressure of air from increasing when the vibrating body 1 and the damper 7 vibrate at a low frequency, the plate 6 has a central hole 13.
The yoke 5 is provided with a plurality of holes 14. The cross-sectional structure is shown in FIG.
【００１６】信号着信を知らせる音声や相手の会話音を
発生する場合は、振動体１の数百ヘルツから３キロヘル
ツの振動で実現し、着信信号を振動で知らせる場合に
は、数百ヘルツ以下の低周波数で振動体１を駆動し、衝
突部２との衝突振動を外部に伝える。この時の振動方向
は上下方向のみで、効率的に振動エネルギーを外部に取
り出すことができるWhen a voice for notifying a signal incoming or a conversational sound of the other party is generated, it is realized by a vibration of several hundred hertz to 3 kilohertz of the vibrating body 1. The vibrating body 1 is driven at a low frequency, and the collision vibration with the collision unit 2 is transmitted to the outside. The vibration direction at this time is only the vertical direction, and the vibration energy can be efficiently extracted to the outside.
【００１７】構造強度を上げるため、振動体１をドーム
形状にし、さらにはドーム形状の内壁面に複数のリブ１
５を設け、これらも樹脂の一体成形で形成することで、
より強度を上げることができる。In order to increase the structural strength, the vibrating body 1 is formed in a dome shape, and a plurality of ribs 1 are formed on the inner wall surface of the dome shape.
5 is provided and these are also integrally formed of resin,
The strength can be increased.
【００１８】振動体１とボビン９と樹脂の一体成形で形
成された円環状平坦部８の強度を確保するために、肉厚
を振動体１の部分よりも大きいものにする。In order to secure the strength of the annular flat portion 8 formed by integrally molding the vibrating body 1, the bobbin 9 and the resin, the wall thickness is made larger than that of the vibrating body 1.
【００１９】円環状平坦部８の外周の径をボビン９の径
よりも大きくし、ダンパ７との接着を安定した強度の強
いものし、またコイル３を巻く位置決めを容易にする。The diameter of the outer circumference of the annular flat portion 8 is made larger than the diameter of the bobbin 9 so that the adhesion with the damper 7 is stable and strong and the coil 3 is easily positioned for winding.
【００２０】ダンパ７をゴムのように弾性のある材料で
成形することによって、固い樹脂の円環状平坦部８と衝
突部２が衝突する際の緩衝層１６として音の発生を抑
え、また損傷が生じにくいものにする。また円環状平坦
部８に弾性材料を付加しても同じ効果を有する。By molding the damper 7 with an elastic material such as rubber, the cushioning layer 16 when the annular flat portion 8 of the hard resin and the collision portion 2 collide with each other suppresses the generation of sound and damage. Make it difficult to occur. The same effect can be obtained by adding an elastic material to the annular flat portion 8.
【００２１】図１と図２の振動体１の前に設ける衝突部
２、支持梁１２や外周部１０は樹脂成形したものである
が、図３の他の実施例の断面図で示すように、金属キャ
ップ１８で複数の孔１９、２０および２１を設け、さら
には円環状に衝突部の凸部を形成することにより、全体
的に薄く、振動体の保護にすぐれたものができる。The collision part 2, the support beam 12 and the outer peripheral part 10 provided in front of the vibrating body 1 of FIGS. 1 and 2 are made of resin, but as shown in the sectional view of another embodiment of FIG. By providing a plurality of holes 19, 20 and 21 in the metal cap 18, and further forming the convex portion of the collision portion in an annular shape, it is possible to make the overall thin and excellent in the protection of the vibrating body.
【００２３】[0023]
【発明の効果】本発明は、以上説明したように構成され
ているので、以下に記載されるような効果を奏する。Since the present invention is configured as described above, it has the following effects.
【００２４】ムービングコイル型の電気音響変換器を使
用した場合は特に、良質な音声を発生できると同時に、
低い周波数で振動体の変位を大きくとることができる。Particularly when a moving coil type electroacoustic transducer is used, good quality sound can be generated and at the same time,
A large displacement of the vibrating body can be obtained at a low frequency.
【００２５】そして、振動体は上下方向のみに動き衝突
して振動を発生するため、振動エネルギーを有効に取り
だすことができる。また、起動電力も比較的小さいた
め、電力消費を少なくすることができる。Since the vibrating body moves only in the vertical direction and collides with each other to generate vibration, the vibration energy can be effectively taken out. Also, since the starting power is relatively small, power consumption can be reduced.
【００２６】さらに、振動体、ボビンや円環状平坦部を
樹脂の一体成形で連続構造体として形成され、またリブ
や部分肉厚付加など形成が容易にでき、構造強度を上げ
ることができるため、価格、信頼性を確保しやすい。Further, the vibrating body, the bobbin and the annular flat portion are integrally formed of resin to form a continuous structure, and ribs and partial thickness can be easily formed to increase the structural strength. Easy to secure price and reliability.
【００２７】また、磁石、ヨークやプレートは薄いもの
でよいため、５ｍｍほどの薄い外形寸法にすることがで
きる。外周の径は音声の帯域との関係で決めるが、目安
として２５ｍｍほどに小さくできる。Further, since the magnet, the yoke and the plate may be thin, the outer dimension can be as thin as about 5 mm. The outer diameter is determined in relation to the sound band, but can be reduced to about 25 mm as a guide.
【００２８】また、磁石は磁極が曲面形状でなく、コイ
ルも位置決めが容易で、円筒状に同一方向に巻くことで
よく、ヨークやプレートさらには衝突部の金属キャップ
もプレス加工で作られ、組立が簡単で、精度管理も比較
的簡単である。Further, the magnetic pole of the magnet does not have a curved surface shape, and the coil can be easily positioned and can be wound in a cylindrical shape in the same direction. The yoke, the plate and the metal cap of the collision part are also made by press working, and assembled. Is simple and the quality control is relatively easy.
【００２９】さらに、回転する部分がないため、刷子や
軸受け部分がなく、全体の部品数が少なくて済む。また
電気接点の位置によって回転起動しない欠点はない。Furthermore, since there are no rotating parts, there are no brushes or bearings, and the total number of parts is small. In addition, there is no drawback that rotation start does not occur depending on the position of the electrical contact.
【図１】本発明のペイジャー用振動アクチュエータの一
部切り欠け斜視図である。FIG. 1 is a partially cutaway perspective view of a vibration actuator for a pager of the present invention.
【図２】図１の実施例の断面図である。FIG. 2 is a sectional view of the embodiment of FIG.
【図３】他の実施例の断面図である。FIG. 3 is a sectional view of another embodiment.
【図４】従来の円筒形のペイジャー用振動モータの斜視
図である。FIG. 4 is a perspective view of a conventional cylindrical vibration motor for a pager.
【図５】従来の扁平形のペイジャー用振動モータの内部
の斜視図である。FIG. 5 is a perspective view of the inside of a conventional flat type vibration motor for a pager.
１ 振動体 ２、１７ 衝突部 ３ コイル ４ 磁石 ５ ヨーク ６ プレート ７ ダンパ ８ 円環状平坦部 ９ ボビン １０ 外周部 １１ 支持枠 １２ 支持梁 １５ リブ １８ 金属キャップ DESCRIPTION OF SYMBOLS 1 Vibrating body 2, 17 Collision part 3 Coil 4 Magnet 5 Yoke 6 Plate 7 Damper 8 Annular flat part 9 Bobbin 10 Outer peripheral part 11 Support frame 12 Support beam 15 Rib 18 Metal cap
Claims (5)
下に可動な振動体からなる電気音響変換器において、コ
イルを巻くボビンと樹脂で一体成形した前記振動体を低
周波電気信号入力で円環状の衝突部に衝突させることに
より、外部に振動を発生させることを特徴とするペイジ
ャー用振動アクチュエータ。1. An electroacoustic transducer comprising a vibrating body that is movable up and down, forming a magnetic circuit with a permanent magnet and a coil, and the vibrating body integrally molded with a bobbin around which the coil is wound by a low frequency electric signal input. A vibration actuator for a pager, which is configured to generate vibration outside by colliding with an annular collision portion.
周の円環状平坦部にダンパを接着した請求項１記載のペ
イジャー用振動アクチュエータ。2. A vibration actuator for a pager according to claim 1, wherein a central portion of the vibrating body is formed in a dome shape, and a damper is bonded to an outer peripheral annular flat portion.
を形成した請求項２記載のペイジャー用振動アクチュエ
ータ。3. The vibration actuator for a pager according to claim 2, wherein a plurality of ribs are formed on the dome-shaped inner wall surface of the vibrating body.
平坦部を形成した請求項１、２又は３記載のペイジャー
用振動アクチュエータ。4. The vibration actuator for a pager according to claim 1, wherein the annular flat portion of the vibrating body is formed with a diameter larger than that of the bobbin.
平坦部に接着した請求項１、２、３又は４記載のペイジ
ャー用振動アクチュエータ。5. A vibration actuator for a pager according to claim 1, 2, 3 or 4, wherein a damper formed of rubber is bonded to an annular flat portion of the vibrating body.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06952396A JP3458172B2 (en) | 1996-03-26 | 1996-03-26 | Vibration actuator for pager |
| TW86101983A TW405293B (en) | 1996-02-20 | 1997-02-19 | Vibration driving device for a pager |
| TW89113319A TW417348B (en) | 1996-02-20 | 1997-02-19 | Vibration driver of pager |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06952396A JP3458172B2 (en) | 1996-03-26 | 1996-03-26 | Vibration actuator for pager |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09261917A true JPH09261917A (en) | 1997-10-03 |
| JP3458172B2 JP3458172B2 (en) | 2003-10-20 |
Family
ID=13405178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06952396A Expired - Fee Related JP3458172B2 (en) | 1996-02-20 | 1996-03-26 | Vibration actuator for pager |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3458172B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999022882A1 (en) * | 1997-10-30 | 1999-05-14 | Matsushita Electric Industrial Co., Ltd. | Electric-mechanical-acoustic transducer and a method of manufacturing the same |
| WO1999039843A1 (en) * | 1998-02-06 | 1999-08-12 | Namiki Seimitsu Houseki Kabushiki Kaisha | Electromagnetic actuator and structure for mounting the same |
| WO2003057375A1 (en) * | 2001-12-28 | 2003-07-17 | Namiki Seimitsu Houseki Kabushiki Kaisha | Multi-functional vibrating actuator |
| JP2013197867A (en) * | 2012-03-19 | 2013-09-30 | Yamaha Corp | Electroacoustic conversion apparatus |
-
1996
- 1996-03-26 JP JP06952396A patent/JP3458172B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999022882A1 (en) * | 1997-10-30 | 1999-05-14 | Matsushita Electric Industrial Co., Ltd. | Electric-mechanical-acoustic transducer and a method of manufacturing the same |
| US6570993B1 (en) | 1997-10-30 | 2003-05-27 | Matsushita Electric Industrial Co., Ltd. | Electric-mechanical-acoustic converter and method for producing the same |
| US6724908B2 (en) | 1997-10-30 | 2004-04-20 | Matsushita Electric Industrial Co., Ltd. | Method for producing electric-mechanical acoustic converter |
| CN100356444C (en) * | 1997-10-30 | 2007-12-19 | 松下电器产业株式会社 | Electric-mechanical-acoustic transducer and method for mfg. same |
| WO1999039843A1 (en) * | 1998-02-06 | 1999-08-12 | Namiki Seimitsu Houseki Kabushiki Kaisha | Electromagnetic actuator and structure for mounting the same |
| US6873234B2 (en) | 1998-02-06 | 2005-03-29 | Tsuneo Kyouno | Electromagnetic actuator mounting structure |
| US6917270B1 (en) | 1998-02-06 | 2005-07-12 | Namiki Precision Jewel Co., Ltd. | Electromagnetic actuator and structure for mounting the same |
| WO2003057375A1 (en) * | 2001-12-28 | 2003-07-17 | Namiki Seimitsu Houseki Kabushiki Kaisha | Multi-functional vibrating actuator |
| US6847139B2 (en) | 2001-12-28 | 2005-01-25 | Namiki Seimitsu Houseki Kabushiki Kaisha | Multi-functional vibrating actuator |
| JP2013197867A (en) * | 2012-03-19 | 2013-09-30 | Yamaha Corp | Electroacoustic conversion apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3458172B2 (en) | 2003-10-20 |
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