JP3497320B2 - Bone-conducted voice transmission device - Google Patents
Bone-conducted voice transmission deviceInfo
- Publication number
- JP3497320B2 JP3497320B2 JP07182496A JP7182496A JP3497320B2 JP 3497320 B2 JP3497320 B2 JP 3497320B2 JP 07182496 A JP07182496 A JP 07182496A JP 7182496 A JP7182496 A JP 7182496A JP 3497320 B2 JP3497320 B2 JP 3497320B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetostrictive element
- bone
- transmission device
- voice transmission
- conduction
- 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
Links
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、難聴者用の補聴器
として用いられる音声伝達装置に関するものであり、詳
しくは音声を変換した電気信号を難聴者が聞き取り可能
な頭蓋骨等に加わる機械信号に変換する電気機械変換素
子に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice transmission device used as a hearing aid for a hearing-impaired person, and more particularly to converting an electrical signal converted from a voice into a mechanical signal applied to a skull or the like which can be heard by a hearing-impaired person. The present invention relates to an electromechanical conversion element that operates.
【０００２】[0002]
【従来の技術】通常、人間の音声は空気振動によって鼓
膜が動き、鼓膜の振動によって発生する電気パルスを信
号として脳に伝達し音声を認識している。一般に難聴者
は、前記鼓膜が正常に機能しないため、音声が聞き取り
にくくなっている。2. Description of the Related Art Normally, in human voice, the eardrum is moved by air vibration, and the electric pulse generated by the vibration of the eardrum is transmitted to the brain as a signal to recognize the voice. Generally, the hearing-impaired person cannot hear the sound because the eardrum does not function normally.
【０００３】しかし、難聴者には、鼓膜は正常に機能し
ないが、頭蓋骨等に機械的な振動を加えることによって
音声を認識できる者が多い。そこで、音声を変換した電
気信号を機械信号に変換し難聴者の頭蓋骨等に振動を加
えることによって音声を認識させる骨導式音声伝達装置
が補聴器として使われている。However, many people with deafness can recognize voice by applying mechanical vibration to the skull or the like, although the eardrum does not function normally. Therefore, a bone-conduction type voice transmission device is used as a hearing aid to convert an electrical signal obtained by converting a voice into a mechanical signal and recognize the voice by applying vibration to a skull or the like of a hearing-impaired person.
【０００４】電気信号を機械信号に変換する方法を大別
すると共振を利用する共振型と共振を利用しない非共振
型に分けることができる。The methods of converting an electrical signal into a mechanical signal can be roughly classified into a resonance type that uses resonance and a non-resonance type that does not use resonance.
【０００５】しかし、共振を利用しない非共振型は比較
的平坦な周波数特性を持っているが、電気機械変換効率
が悪く一般にはあまり使われていない。However, although the non-resonant type which does not utilize resonance has a relatively flat frequency characteristic, it has a poor electromechanical conversion efficiency and is not generally used.
【０００６】そこで、従来補聴器として使われている骨
導式音声伝達装置は共振型が主流となっている。[0006] Therefore, the resonance type is the mainstream of the bone-conduction type voice transmission device which has been used as a hearing aid.
【０００７】共振型の骨導式音声伝達装置における電気
機械変換素子は、一般に動電型といわれている方式で、
電気信号を入力するコイル部に頭蓋骨等を振動させる可
動部を固定し、該コイル部の中心に磁石を設置すること
により電気信号を機械信号に変換している。The electromechanical conversion element in the resonance-type bone-conduction-type voice transmission device is of a system generally called electrokinetic type.
A movable part for vibrating a skull or the like is fixed to a coil part for inputting an electric signal, and a magnet is installed at the center of the coil part to convert the electric signal into a mechanical signal.
【０００８】前記共振型の骨導式音声伝達装置における
電気機械変換素子は、可動部等の質量に起因するある特
定の周波数、即ち共振周波数において小さな電気信号で
あっても頭蓋骨等に力強い振動を加えることができる
が、共振周波数から外れた周波数帯にあっては、頭蓋骨
等に微弱な振動しか加えることができないため、使用者
にとってこの周波数帯域にある音声は非常に聞き取りに
くく、最悪の場合は聞くことができなくなってしまう。The electromechanical conversion element in the resonance-type bone-conduction-type voice transmission device vibrates the skull or the like powerfully even if a small electric signal is generated at a certain frequency due to the mass of the movable part, that is, the resonance frequency. Although it can be added, in the frequency band outside the resonance frequency, only weak vibration can be applied to the skull, etc., so it is very difficult for the user to hear voice in this frequency band, and in the worst case, I can't hear.
【０００９】頭蓋骨等に力強い振動を加えるためには可
動部の持つ運動エネルギーを高くすればよいので、加速
度を増加するか、可動部等の質量を大きくすれば運動エ
ネルギーが増し頭蓋骨等に力強い振動を加えることがで
きることとなる。In order to apply strong vibration to the skull or the like, it is sufficient to increase the kinetic energy of the movable part. Therefore, if acceleration is increased or the mass of the movable part or the like is increased, the kinetic energy is increased and the skull or the like is vibrated strongly. Will be added.
【００１０】しかし、動電型の電気機械変換素子は大き
な加速度を得ることは困難であり、質量を大きくすると
慣性による可動部の立ち上がり特性が悪化し、その結果
主として高域部での変換劣化が悪化してしまうという問
題がある。However, it is difficult for the electrokinetic electromechanical conversion element to obtain a large acceleration, and when the mass is increased, the rising characteristics of the movable part due to inertia deteriorate, and as a result, conversion deterioration mainly occurs in the high frequency range. There is a problem that it gets worse.
【００１１】[0011]
【発明が解決しようとする課題】このような問題を解決
するため図５に示す構造の電気機械変換素子が提案され
ている。In order to solve such a problem, an electromechanical conversion element having a structure shown in FIG. 5 has been proposed.
【００１２】ボビン４６に巻線されたコイル４５をもつ
第１のコイル部４１ａと同様な構造の第２のコイル部４
１ｂを直列に接続し、信号入力端子４２より音声信号を
変換した電気信号を前記第１および第２のコイル部４１
ａ，４１ｂへ入力できる構造となっている。The second coil portion 4 having the same structure as the first coil portion 41a having the coil 45 wound around the bobbin 46.
1b is connected in series, and an electric signal obtained by converting an audio signal from a signal input terminal 42 is converted into an electric signal by the first and second coil portions 41.
It has a structure that allows input to a and 41b.
【００１３】さらに、磁石４３は前記第１および第２の
コイル部４１ａ，４１ｂが互いに並列な磁気回路を構成
できるよう配置された第１の磁性体４４と第２の磁性体
４７により狭持されている。Further, the magnet 43 is sandwiched by a first magnetic body 44 and a second magnetic body 47 which are arranged so that the first and second coil portions 41a and 41b can form a magnetic circuit in parallel with each other. ing.
【００１４】また、第１のコイル部４１ａと第２のコイ
ル部４１ｂはそれぞれ第１の可動辺４８ａおよび第２の
可動辺４８ｂに接続され前記可動辺はそれぞれケース５
０にビス４９によって固定されている。The first coil portion 41a and the second coil portion 41b are connected to the first movable side 48a and the second movable side 48b, respectively, and the movable sides are respectively case 5.
It is fixed to 0 with a screw 49.
【００１５】したがって、コイル部および可動片を２つ
に分けケース５０を振動させるため結果的に２つの可動
辺のもつ運動エネルギーにより１つのケースを振動さ
せ、それによって頭蓋骨等に振動を加えることとなるの
で、比較的小さな質量であっても大きな運動エネルギー
を得ることが可能となる。Therefore, in order to vibrate the case 50 by dividing the coil portion and the movable piece into two, one case is vibrated by the kinetic energy of the two movable sides, and vibration is applied to the skull or the like. Therefore, it is possible to obtain large kinetic energy even with a relatively small mass.
【００１６】しかし、コイル駆動部が２個必要であるた
め形状が大きく、また重量も重くなり軽敏さに欠けるた
め、骨導式音声伝達装置として用いられる電気機械変換
素子としては使いづらいものとなる。However, since two coil driving parts are required, the shape is large, and the weight is heavy and lacks in dignity, so that it is difficult to use as an electromechanical conversion element used as a bone conduction type voice transmission device. Become.
【００１７】そこで、本発明は小型軽量であって広帯域
にわたり変換効率の高い電気機械変換素子を用いた骨導
式音声伝達装置の提供を目的とする。Therefore, an object of the present invention is to provide a bone-conduction type voice transmission device which is small and lightweight and which uses an electromechanical conversion element having a high conversion efficiency over a wide band.
【００１８】[0018]
【課題を解決するための手段】上記目的を達成するため
請求項１記載の発明は、棒状の磁歪素子と、該磁歪素子
を中心として巻線されている駆動コイルと、該駆動コイ
ルと前記磁歪素子の周囲に配置された環状磁石と、２枚
の円板状磁性体と弾性部材とケース部材と磁性部材とを
備えた骨導式音声伝達装置において、前記環状磁石は上
下を２枚の円板状磁性体で挟まれていて、その一方の円
板の中心部には前記磁歪素子に当接する磁性部材が通る
穴を具備し、前記ケース部材と磁性部材との間に弾性部
材を介すことによって前記磁歪素子に一定の圧力が加え
られている電気機械変換素子を用いた骨導式音声伝達装
置を提供する。To achieve the above object, the invention according to claim 1 is a rod-shaped magnetostrictive element, a drive coil wound around the magnetostrictive element, the drive coil and the magnetostrictive element. In a bone-conduction-type voice transmission device including an annular magnet arranged around an element, two disk-shaped magnetic bodies, an elastic member, a case member, and a magnetic member, the annular magnet has two upper and lower circles. It is sandwiched by plate-shaped magnetic bodies, and a hole through which a magnetic member that contacts the magnetostrictive element passes is provided at the center of one of the discs, and an elastic member is interposed between the case member and the magnetic member. Thus, there is provided a bone-conduction type voice transmission device using an electromechanical conversion element in which a constant pressure is applied to the magnetostrictive element.
【００１９】ここで、前記磁性部材にフランジを設け、
該フランジ部とケース部材の間に弾性部材を挿入すれば
前記磁歪素子に対し、容易に弾性部材による圧力を加え
ることができる。Here, a flange is provided on the magnetic member,
By inserting an elastic member between the flange portion and the case member, it is possible to easily apply pressure by the elastic member to the magnetostrictive element.
【００２０】さらに、請求項２に記載の発明は、前記ケ
ース部材に設けられた雌ねじ部に雄ねじを設けた底板を
螺合させることにより前記磁歪素子に一定の圧力が加え
られている請求項１記載の骨導式音声伝達装置を提供す
る。Further, in the invention according to claim 2, a constant pressure is applied to the magnetostrictive element by screwing a bottom plate provided with a male screw with a female screw portion provided on the case member. A bone-conducting voice transmission device as described is provided.
【００２１】また、請求項３に記載の発明は、磁歪素子
としてＴｂ0.3Ｄｙ0.7Ｆｅ2.0結晶をもつ骨導式音声伝
達装置であって、前記磁歪素子に加えられる一定の圧力
が３５乃至４５ｋｇ／ｃｍ2である請求項１及び２記載
の骨導式音声伝達装置を提供する。The invention according to claim 3 is the bone-conduction type voice transmission device having a Tb 0.3 Dy 0.7 Fe 2.0 crystal as a magnetostrictive element, wherein a constant pressure applied to the magnetostrictive element is 35 to 45 kg / A bone-conducting sound transmitting device according to claim 1 or 2, wherein the bone-conducting sound transmitting device is cm 2 .
【００２２】[0022]
【発明の実施の形態】電気信号を機械信号に変換する方
法の一つに磁歪素子を用いる方法があげられる。BEST MODE FOR CARRYING OUT THE INVENTION One of the methods for converting an electric signal into a mechanical signal is a method using a magnetostrictive element.
【００２３】磁性体に外部磁界を作用させると磁性体に
は伸びあるいは縮みが発生する。これを磁歪と称する。
磁歪は、従来より変異制御用あるいは駆動用アクチュエ
ータ、各種センサ等に応用されている。磁歪は磁歪量が
非常に小さいものであるが、磁歪により発生する駆動
力、即ち運動エネルギーは非常に強いことが特徴となっ
ている。When an external magnetic field is applied to the magnetic material, the magnetic material expands or contracts. This is called magnetostriction.
Magnetostriction has been conventionally applied to mutation control or drive actuators, various sensors, and the like. Magnetostriction has a very small amount of magnetostriction, but is characterized in that the driving force generated by magnetostriction, that is, the kinetic energy is very strong.
【００２４】磁歪素子は磁歪量が大きいことが基本的に
要求されるが、低磁界強度での磁歪量を向上させた磁歪
素子としてＴｂ0.3Ｄｙ0.7Ｆｅ2.0結晶をもつ磁歪素子
が実用性が高く多用されている。The magnetostrictive element is basically required to have a large magnetostriction amount, but a magnetostrictive element having a Tb 0.3 Dy 0.7 Fe 2.0 crystal is highly practical as a magnetostrictive element having an improved magnetostriction amount at a low magnetic field strength. It is used a lot.
【００２５】磁歪素子は一般に静加重を加えると磁歪量
に変化が現れることが知られているが、この磁歪素子に
磁歪量が最も大きくなるような一定の圧力を加え、その
周囲に駆動コイルを設置し、永久磁石等によって直流磁
界を印加する。その後、駆動コイルへ音声を変換した電
気信号を加え、該磁歪素子を駆動する。It is known that the magnetostrictive element generally changes in magnetostriction when static load is applied. However, a constant pressure that maximizes the magnetostriction is applied to the magnetostrictive element, and a driving coil is provided around the magnetostrictive element. Install and apply a DC magnetic field with a permanent magnet or the like. After that, an electric signal obtained by converting the voice is applied to the drive coil to drive the magnetostrictive element.
【００２６】前述したように、磁歪素子の磁歪量は小さ
いながら駆動力は非常に強いものであるので、頭蓋骨等
に力強い振動を与えることができる。As described above, since the magnetostrictive element has a small magnetostriction and the driving force is very strong, it is possible to give strong vibration to the skull or the like.
【００２７】[0027]
【実施例】次に、図面を用いさらに詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a more detailed description will be given with reference to the drawings.
【００２８】図１（ａ）に本発明にかかる磁歪素子を用
いた骨導式音声伝達装置における電気機械変換素子の断
面図を示す。FIG. 1A shows a sectional view of an electromechanical conversion element in a bone-conduction type voice transmission device using a magnetostrictive element according to the present invention.
【００２９】磁歪素子１を中心としてボビン３に巻線さ
れた駆動コイル４を配置し、さらにその外側に感状磁石
を配置する。該環状磁石はその上下を中心に穴を設けた
第１の円板状磁性体２と前記磁歪素子１にも接している
第１の円板状磁性体２に狭持される。A drive coil 4 wound around a bobbin 3 around the magnetostrictive element 1 is arranged, and a sensitive magnet is arranged outside the drive coil 4. The ring-shaped magnet is sandwiched between a first disc-shaped magnetic body 2 having a hole centered above and below and a first disc-shaped magnetic body 2 in contact with the magnetostrictive element 1.
【００３０】また、第１の円板状磁性体２に設けられた
穴を通して磁性部材９が差し込まれ、前記磁歪素子に当
接している。さらに、これら全体をケース６に入れ電気
機械変換素子を構成する。A magnetic member 9 is inserted through a hole provided in the first disk-shaped magnetic body 2 and is in contact with the magnetostrictive element. Further, the whole of them is put in a case 6 to form an electromechanical conversion element.
【００３１】ここで、ケース６と磁性部材９との間に
は、前記磁歪素子１に適切な静加重が加わるよう弾性部
材８を挿入している。An elastic member 8 is inserted between the case 6 and the magnetic member 9 so that an appropriate static load is applied to the magnetostrictive element 1.
【００３２】磁歪素子１には、環状磁石７と第１の円板
状磁性体２と第１の円板状磁性体２、および磁性部材９
によって構成される磁気回路により直流偏磁が加えられ
る。The magnetostrictive element 1 includes an annular magnet 7, a first disk-shaped magnetic body 2, a first disk-shaped magnetic body 2, and a magnetic member 9.
DC bias is applied by a magnetic circuit constituted by
【００３３】このように構成された磁歪素子１の磁歪量
と磁力の関係は、図２に示すようなヒステリシスカーブ
となる。The relationship between the amount of magnetostriction and the magnetic force of the magnetostrictive element 1 thus constructed has a hysteresis curve as shown in FIG.
【００３４】前述したように、磁歪素子１には環状磁石
により直流偏磁が加えられているため、動作点が例えば
Ｂ点に移動し、磁歪が線形に動作する点で磁歪素子１を
駆動することができることとなる。As described above, since DC bias is applied to the magnetostrictive element 1 by the annular magnet, the operating point moves to, for example, point B, and the magnetostrictive element 1 is driven at the point where the magnetostriction operates linearly. It will be possible.
【００３５】前述した、従来の動電型電気機械変換素子
を用いたイヤホーン型骨導式音声伝達装置（従来例２）
および、この改良型であるコイル駆動部が２個必要な動
電型電気機械変換素子を用いた骨導式音声伝達装置（従
来例１）と、本発明にかかる電気機械変換素子を用いた
骨導式音声伝達装置の周波数特性を図３に示す。An earphone type bone conduction voice transmitting device using the conventional electrokinetic electromechanical conversion element described above (conventional example 2).
A bone-conducting voice transmitting device (conventional example 1) using an electrodynamic electromechanical conversion element that requires two coil driving units, which is an improved version of the invention, and a bone using the electromechanical conversion element according to the present invention. The frequency characteristics of the conductive voice transmission device are shown in FIG.
【００３６】なお、本図において示されている加速度の
測定は、レーザー光によって磁歪素子の最大変移量を測
定し、該変移量は駆動コイルにかかる信号に比例して変
移していることから、変移量を２階微分することにより
算出した。In the measurement of acceleration shown in this figure, the maximum amount of displacement of the magnetostrictive element is measured by laser light, and the amount of displacement is proportional to the signal applied to the drive coil. It was calculated by second-order differentiating the shift amount.
【００３７】本図より、従来の動電型電気機械変換素子
を用いた骨導式音声伝達装置は共振点においては力強く
振動するが共振点から外れると微弱な振動となり、この
周波数帯域の音声は聞くことが非常に困難であることが
わかる。As shown in the figure, the conventional bone-conduction-type voice transmission device using the electrokinetic electromechanical conversion element vibrates strongly at the resonance point, but becomes weak when it deviates from the resonance point. I find it very difficult to hear.
【００３８】これに対して、本発明にかかる電気機械変
換素子を用いた骨導式音声伝達装置は共振点を持たず、
加えて低周波領域から安定して大きな加速度を得ること
ができるため、低周波領域から高周波領域にわたって安
定した音声を聞くことができる。On the other hand, the bone-conduction type voice transmission device using the electromechanical conversion element according to the present invention has no resonance point,
In addition, since a large acceleration can be stably obtained from the low frequency region, stable voice can be heard from the low frequency region to the high frequency region.
【００３９】図１（ｂ）は本発明にかかる磁歪素子を用
いた骨導式音声伝達装置における電気機械変換素子の、
他の実施例を示す断面図である。FIG. 1 (b) shows an electromechanical conversion element in a bone conduction type voice transmission device using a magnetostrictive element according to the present invention.
It is sectional drawing which shows another Example.
【００４０】磁歪素子を中心として駆動コイル４や環状
磁石７を配置し、二つの円板状磁性体と磁性部材１０で
前記磁歪素子に直流偏磁を加え、駆動コイルに加わる電
気信号で磁歪素子を駆動することは図１（ａ）の実施例
と同等であるが、それら全体を挿入するケース１２に雌
ねじ部を設け、雄ねじ部を設けた底板１３を螺合させて
いる。底板１３に具備される調整用つまみ１３を回転さ
せることにより磁歪素子に適切な加重を加えることがで
きる。The drive coil 4 and the annular magnet 7 are arranged around the magnetostrictive element, and the two disk-shaped magnetic bodies and the magnetic member 10 apply DC bias to the magnetostrictive element, and the magnetostrictive element is applied by an electric signal applied to the drive coil. 1 is driven in the same manner as in the embodiment of FIG. 1A, but a case 12 into which all of them are inserted is provided with a female screw portion, and a bottom plate 13 provided with a male screw portion is screwed. By rotating the adjusting knob 13 provided on the bottom plate 13, an appropriate weight can be applied to the magnetostrictive element.
【００４１】図４に、Ｔｂ0.3Ｄｙ0.7Ｆｅ2.0結晶をも
つ磁歪素子を用いた場合の静加重と磁歪の相関図を示
す。FIG. 4 shows a correlation diagram between static load and magnetostriction when a magnetostrictive element having a Tb 0.3 Dy 0.7 Fe 2.0 crystal is used.
【００４２】本図より、前記磁歪素子に静加重として３
５乃至４５ｋｇ／ｃｍ2を加えたとき最も大きな磁歪を
示すことがわかり、骨導式音声伝達装置の電気機械変換
素子に用いられる磁歪素子の静加重としては最適である
ことがわかる。From this figure, a static load of 3 is applied to the magnetostrictive element.
It is found that the largest magnetostriction is exhibited when 5 to 45 kg / cm 2 is applied, and it is found that it is optimum as the static load of the magnetostrictive element used for the electromechanical conversion element of the bone conduction type voice transmission device.
【００４３】ここで、本実施例では磁歪素子としてＴｂ
0.3Ｄｙ0.7Ｆｅ2.0結晶をもつ磁歪素子を用いたが、駆
動コイルにより力強い振動を加えることができるならば
他の磁歪素子を用いても良い。In this embodiment, Tb is used as the magnetostrictive element.
Although the magnetostrictive element having the 0.3 Dy 0.7 Fe 2.0 crystal was used, another magnetostrictive element may be used as long as strong vibration can be applied by the driving coil.
【００４４】[0044]
【発明の効果】本発明により、小型軽量であって広帯域
にわたり変換効率の高い電気機械変換素子を提供するこ
とが可能となるので、非常に聞き易い音声を認識できる
骨導式音声伝達装置を提供することができる。As described above, according to the present invention, it is possible to provide an electromechanical conversion element which is small and lightweight and has a high conversion efficiency over a wide band. Therefore, a bone-conduction type voice transmission device capable of recognizing a voice that is very easy to hear is provided. can do.
【図１】本発明にかかる磁歪素子を用いた骨導式音声伝
達装置における電気機械変換素子の断面図FIG. 1 is a cross-sectional view of an electromechanical conversion element in a bone-conduction type sound transmission device using a magnetostrictive element according to the present invention.
【図２】磁歪素子の磁歪量と磁力の関係図FIG. 2 is a diagram showing the relationship between the amount of magnetostriction of a magnetostrictive element and the magnetic force.
【図３】磁歪素子の周波数特性FIG. 3 Frequency characteristics of magnetostrictive element
【図４】Ｔｂ0.3Ｄｙ0.7Ｆｅ2.0結晶の磁歪素子を用い
た静加重と磁歪量の相関図FIG. 4 is a correlation diagram between static load and magnetostriction amount using a magnetostrictive element of Tb 0.3 Dy 0.7 Fe 2.0 crystal.
【図５】従来の電気機械変換素子の概念図FIG. 5 is a conceptual diagram of a conventional electromechanical conversion element.
１ 磁歪素子 ２ 第１の円板状磁性体 ４ 駆動コイル ５ 第２の円板状磁性体 ６ ケース ７ 環状磁石 ８ 弾性部材 ９ 磁性部材 １１ 雄ねじ部を設けた底板 １２ 雌ねじ部を設けたケース ４１ 第１、第２のコイル部 ４３ 磁石 ４４ 第１の磁性体 ４７ 第２の磁性体 ４８ 第１、第２の可動片 ５０ ケース 1 Magnetostrictive element 2 First disk-shaped magnetic body 4 drive coil 5 Second disk-shaped magnetic body 6 cases 7 Ring magnet 8 elastic members 9 Magnetic member 11 Bottom plate with external threads 12 Case with internal thread 41 First and second coil parts 43 Magnet 44 First magnetic material 47 Second magnetic body 48 First and second movable pieces 50 cases
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−273100（ＪＰ，Ａ) 特表 平９−504663（ＪＰ，Ａ) 米国特許5338287（ＵＳ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H04R 25/00 B06B 1/08 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-273100 (JP, A) JP-A-9-504663 (JP, A) US Pat. No. 5338287 (US, A) (58) Fields investigated (Int .Cl. 7 , DB name) H04R 25/00 B06B 1/08
Claims (3)
て巻線されている駆動コイルと、該駆動コイルと前記磁
歪素子の周囲に配置された環状磁石と、２枚の円板状磁
性体と弾性部材とケース部材と磁性部材とを備えた骨導
式音声伝達装置において、前記環状磁石は上下を２枚の
円板状磁性体で挟まれていて、その一方の円板の中心部
には前記磁歪素子に当接する磁性部材が通る穴を具備
し、前記ケース部材と磁性部材との間に弾性部材を介す
ことによって前記磁歪素子に一定の圧力が加えられてい
ることを特徴とする骨導式音声伝達装置。1. A rod-shaped magnetostrictive element, a drive coil wound around the magnetostrictive element, an annular magnet disposed around the drive coil and the magnetostrictive element, and two disc-shaped magnetic elements. In a bone-conduction-type sound transmitting device including a body, an elastic member, a case member, and a magnetic member, the annular magnet is sandwiched between two disc-shaped magnetic bodies at the top and bottom, and the central portion of one of the discs. A hole through which a magnetic member that abuts the magnetostrictive element passes, and a constant pressure is applied to the magnetostrictive element by interposing an elastic member between the case member and the magnetic member. Bone conduction voice transmission device.
ねじを設けた底板を螺合させることにより前記磁歪素子
に一定の圧力が加えられていることを特徴とする請求項
１記載の骨導式音声伝達装置。2. The bone conduction device according to claim 1, wherein a constant pressure is applied to the magnetostrictive element by screwing a bottom plate provided with a male screw onto a female screw portion provided on the case member. Voice transmission device.
晶をもつ骨導式音声伝達装置であって、前記磁歪素子に
加えられる一定の圧力が３５乃至４５ｋｇ／ｃｍ2であ
ることを特徴とする請求項１及び２記載の骨導式音声伝
達装置。3. A bone-conducting voice transmission device having a Tb 0.3 Dy 0.7 Fe 2.0 crystal as a magnetostrictive element, wherein the constant pressure applied to the magnetostrictive element is 35 to 45 kg / cm 2. The bone-conduction-type voice transmission device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07182496A JP3497320B2 (en) | 1996-03-27 | 1996-03-27 | Bone-conducted voice transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07182496A JP3497320B2 (en) | 1996-03-27 | 1996-03-27 | Bone-conducted voice transmission device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09261797A JPH09261797A (en) | 1997-10-03 |
| JP3497320B2 true JP3497320B2 (en) | 2004-02-16 |
Family
ID=13471699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07182496A Expired - Fee Related JP3497320B2 (en) | 1996-03-27 | 1996-03-27 | Bone-conducted voice transmission device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3497320B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7657049B2 (en) * | 2003-06-11 | 2010-02-02 | Able Planet, Incorporated | Telephone handset |
| US7978867B2 (en) | 2003-06-11 | 2011-07-12 | Able Planet, Incorporated | Audio signal system |
| JP2007081838A (en) * | 2005-09-14 | 2007-03-29 | Opt Kk | Sounding implement using super-magnetostrictive actuator |
| WO2007072610A1 (en) * | 2005-12-22 | 2007-06-28 | Frey Co., Ltd. | Magnetostrictive device |
| KR100799427B1 (en) * | 2006-06-23 | 2008-01-29 | 박의봉 | Bone conductive speaker |
| EP2119308A4 (en) | 2007-02-09 | 2015-04-08 | Able Planet Inc | Method and apparatus for modifying an audio signal |
| GB2490822B (en) * | 2008-07-11 | 2013-02-27 | Brain Basket Llc | Magnetostrictive auditory system |
| JP5219037B2 (en) | 2008-09-25 | 2013-06-26 | 国立大学法人電気通信大学 | Implantable bone conduction hearing aid |
| KR102061885B1 (en) * | 2018-12-31 | 2020-02-11 | 아날로그플러스 주식회사 | A Support Structure for Vibrator Speaker Unit |
-
1996
- 1996-03-27 JP JP07182496A patent/JP3497320B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09261797A (en) | 1997-10-03 |
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