JP6025244B2 - Earpad and earphone using the earpad - Google Patents

Earpad and earphone using the earpad Download PDF

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JP6025244B2
JP6025244B2 JP2012140324A JP2012140324A JP6025244B2 JP 6025244 B2 JP6025244 B2 JP 6025244B2 JP 2012140324 A JP2012140324 A JP 2012140324A JP 2012140324 A JP2012140324 A JP 2012140324A JP 6025244 B2 JP6025244 B2 JP 6025244B2
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ear canal
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JP2014007478A (en
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月 胡
月 胡
晃 原
晃 原
学 笹島
学 笹島
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Foster Electric Co Ltd
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Description

本発明は、インイヤータイプのイヤホンに用いられ、耳道入り口に挿入されるイヤパッドおよびこのイヤパッドを用いたイヤホンに関する。   The present invention relates to an earpad that is used in an in-ear type earphone and is inserted into an ear canal entrance, and an earphone using the earpad.

一般に、インイヤータイプのイヤホンに用いられるイヤパッドは、外周部の断面形状が円形の弾性材料で形成され、自由に変形し得るようになっている。そして、外耳道に挿入されると、外耳道の形状に適合して変形かつ密着することにより、ユーザの耳に対して密着した装着状態を維持する。   In general, an ear pad used in an in-ear type earphone is formed of an elastic material having a circular cross-sectional shape at an outer peripheral portion, and can be freely deformed. Then, when inserted into the ear canal, it is deformed and brought into close contact with the shape of the ear canal, thereby maintaining a tightly attached state to the user's ear.

しかしながら、人の耳道断面形状（イヤパッド接触部）は、通常は楕円形状であり個人差もある。このため、円形のイヤパッドを耳道に挿入すると想定していない場所に皺や隙間が生じ、音声が漏れたり、特に低域の音圧が低下したりする（例えば特許文献１参照）。また、場所により反力差があり、長時間の装着時には特定部位に痛みが生じることがある。さらに、ノイズキャンセル機能付きのイヤホンの場合、隙間からの漏洩によって所望の音圧周波数特性やノイズキャンセル機能が発揮できない場合がある。   However, a person's ear canal cross-sectional shape (ear pad contact portion) is usually an ellipse and has individual differences. For this reason, a wrinkle or a gap is generated in a place where it is not assumed that the circular ear pad is inserted into the ear canal, and sound leaks or particularly low-frequency sound pressure is reduced (see, for example, Patent Document 1). Also, there is a difference in reaction force depending on the location, and pain may occur at a specific site when worn for a long time. Furthermore, in the case of an earphone with a noise canceling function, a desired sound pressure frequency characteristic or a noise canceling function may not be exhibited due to leakage from a gap.

特開２００９−１６５１５５号公報JP 2009-165155 A

上述したように、従来のインイヤータイプのイヤホンに用いられるイヤパッドは、意図していない変形によって装着時の痛みや違和感が生じたり、不快な脱落が起こったりする、という課題があった。   As described above, the earpads used in conventional in-ear type earphones have problems that unintended deformation causes pain or discomfort at the time of wearing or uncomfortable dropout.

また、従来のイヤホンは、意図していない漏洩により、所望の音圧周波数特性やノイズキャンセル性能が発揮できない、という課題があった。   Further, the conventional earphone has a problem that desired sound pressure frequency characteristics and noise canceling performance cannot be exhibited due to unintended leakage.

本発明は上記のことに鑑み提案されたもので、その目的とするところは、装着時の痛みや違和感、不快な脱落を防止することができるイヤパッドを提供することにある。   The present invention has been proposed in view of the above, and an object thereof is to provide an earpad that can prevent pain, discomfort, and uncomfortable falling off during wearing.

また、本発明の他の目的は、漏洩を少なくして、所望の音圧周波数特性やノイズキャンセル性能を実現できるイヤホンを提供することにある。   Another object of the present invention is to provide an earphone capable of realizing desired sound pressure frequency characteristics and noise canceling performance with less leakage.

上記課題を解決するために、請求項１に係る本発明のイヤパッドは、インイヤータイプのイヤホン１に用いられ、耳道入り口に挿入されるイヤパッド２において、フロントハウジング１Ａの前方外周部に装着される筒部２ａと、筒部前端においてハウジング本体側に向かって湾曲して延びるスカート部２ｂとを有し、前記スカート部は、円形の外径断面が耳道挿入時に耳道形状に対応して異なる変形率で弾性変形し耳道１０内壁に接し、前記異なる変形率は、柔軟性の異なる２種類以上の材料を用いることで生成し、楕円長軸方向Ｙに対して楕円短軸方向Ｘに軟らかい材料を使用するか、前記異なる変形率は、前記スカート部２ｂの肉厚が異なることで生成し、楕円長軸方向Ｙのスカート部２ｂの肉厚ｔ ２ に対して楕円短軸方向Ｘの肉厚ｔ １ が薄いか、または、前記異なる変形率は、前記スカート部２ｂと前記筒部２ａとの間に形成される中空部における、スカート部２ｂ付け根の内壁の半径が異なることで生成し、楕円長軸方向Ｙのスカート部２ｂ付け根の内壁の半径ｒ ２ に対して楕円短軸方向Ｘの内壁の半径ｒ １ が小さいことを特徴とする。 In order to solve the above-described problem, the earpad according to the first aspect of the present invention is used in an in-ear type earphone 1 and is attached to the front outer peripheral portion of the front housing 1A in the earpad 2 inserted into the ear canal entrance. A cylindrical portion 2a and a skirt portion 2b that curves and extends toward the housing main body at the front end of the cylindrical portion, and the skirt portion has a circular outer diameter cross-section that corresponds to the shape of the ear canal when the ear canal is inserted. in deformation rate elastically deformed against the auditory canal 10 interior wall, said different deformation ratio, generated by the use of two or more kinds of materials having different flexibility, the ellipse minor axis direction X with respect to the ellipse major axis Y either by using a soft material, the different deformation ratio, the produced in the thickness of the skirt portion 2b have different, ellipse major axis Y of the skirt portion 2b with respect to the thickness t 2 of the ellipse minor axis direction X wall thickness t Or thin, or the different transformation ratio, the hollow portion formed between the cylindrical portion 2a and the skirt portion 2b, generated by a radius of the inner wall of the base skirt portion 2b have different, ellipse major axis The radius r 1 of the inner wall in the elliptical minor axis direction X is smaller than the radius r 2 of the inner wall of the base of the skirt portion 2b in the direction Y.

請求項２に係る発明のイヤホンは、前記請求項１記載のイヤパッド２をフロントハウジング１Ａの放音孔１ａの外周部に装着してなることを特徴とする。 An earphone according to a second aspect of the invention is characterized in that the earpad 2 according to the first aspect is attached to the outer peripheral portion of the sound emitting hole 1a of the front housing 1A .

請求項１に係る本発明のイヤパッドによれば、耳道挿入時に円形の外径断面が耳道形状に対応して異なる変形量で変形するので、人の耳道断面形状に応じた形状にイヤパッドが容易に変形し、装着時の痛みや違和感、不快な脱落を防止することができる。よって、良好な装着感が得られる。   According to the earpad of the present invention according to claim 1, the circular outer diameter cross-section is deformed with different deformation amounts corresponding to the ear canal shape when the ear canal is inserted, so that the ear pad has a shape corresponding to the human ear canal cross-sectional shape. Can be easily deformed to prevent pain, discomfort, and uncomfortable falling off when worn. Therefore, a good wearing feeling can be obtained.

また、異なる変形率は、楕円長軸方向に対して楕円短軸方向に軟らかい材料を使用することで人の耳道断面形状に応じた楕円形にイヤパッドを容易に変形させることができる。 Moreover, the different deformation ratios can easily deform the ear pad into an ellipse according to the cross-sectional shape of the human ear canal by using a soft material in the elliptical minor axis direction with respect to the elliptical major axis direction.

また、楕円長軸方向のスカート部の肉厚に対して楕円短軸方向を薄くすることで、人の耳道断面形状に応じた楕円形にイヤパッドを容易に変形させることができる。 Further , by making the elliptical minor axis direction thinner than the thickness of the skirt portion in the elliptical major axis direction, the earpad can be easily deformed into an elliptical shape corresponding to the human ear canal cross-sectional shape.

また、楕円長軸方向のスカート部付け根の内壁の半径に対して楕円短軸方向を小さくすることで、人の耳道断面形状に応じた楕円形にイヤパッドを容易に変形させることができる。 Further , by reducing the elliptical short axis direction relative to the radius of the inner wall of the base of the skirt portion in the elliptical long axis direction, the earpad can be easily deformed into an elliptical shape corresponding to the cross-sectional shape of the human ear canal.

請求項２に係る本発明のイヤホンでは、耳道挿入時に円形の外径断面が耳道形状に対応して異なる変形率で弾性変形するイヤパッドを用いることで、人の耳道断面形状に応じてイヤパッドが変形して耳道に密着させることができるので、意図していない漏洩を少なくして、所望の音圧周波数特性やノイズキャンセル性能を実現できる。 In the earphone of the present invention according to claim 2 , by using an earpad whose circular outer diameter section is elastically deformed at a different deformation rate corresponding to the ear canal shape when the ear canal is inserted, according to the human ear canal sectional shape. Since the ear pad can be deformed and brought into close contact with the ear canal, unintended leakage can be reduced and desired sound pressure frequency characteristics and noise canceling performance can be realized.

本発明の実施形態に係るイヤホンの断面図およびイヤパッド側から見た正面図である。It is sectional drawing of the earphone which concerns on embodiment of this invention, and the front view seen from the earpad side. 耳道の断面形状の例を示す図である。It is a figure which shows the example of the cross-sectional shape of an ear canal. 本発明の第１実施例に係るイヤパッドの正面図および断面図である。It is the front view and sectional drawing of the ear pad which concern on 1st Example of this invention. 本発明の第２実施例に係るイヤパッドの正面図および断面図である。It is the front view and sectional drawing of an ear pad which concern on 2nd Example of this invention. 本発明の第３実施例に係るイヤパッドの正面図および断面図である。It is the front view and sectional drawing of an ear pad which concern on 3rd Example of this invention. 参考例に係るイヤパッドの正面図および断面図である。It is the front view and sectional drawing of the ear pad which concern on a reference example. 他の参考例に係るイヤパッドの正面図および断面図である。It is the front view and sectional drawing of the ear pad which concerns on another reference example.

以下、本発明の一実施形態を図面に基づいて説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

図１（ａ）は本発明の実施形態に係るイヤホンの断面図、図１（ｂ）はイヤパッド側から見た正面図である。このイヤホン１はインイヤータイプであり、イヤパッド２が耳道入り口に挿入されて使用される。   FIG. 1A is a cross-sectional view of an earphone according to an embodiment of the present invention, and FIG. 1B is a front view seen from the earpad side. The earphone 1 is an in-ear type, and an earpad 2 is inserted into an ear canal entrance for use.

上記イヤホン１は、フロントハウジング１Ａとリアハウジング１Ｂとが接合されて形成され、フロントハウジング１Ａの筒状をなす前方外周部に、外耳道内に挿入されるイヤパッド２が被着されている。このイヤパッド２は例えばシリコーンゴム等の弾性変形する柔軟部材からなり、ハウジング前方外周部に対し嵌合されるほぼ円筒状をなす筒部２ａと、筒部前端においてハウジング本体側に向かって湾曲して延びるスカート部（イヤパッド外面部）２ｂとからなる。   The earphone 1 is formed by joining a front housing 1A and a rear housing 1B, and an ear pad 2 to be inserted into the ear canal is attached to a front outer peripheral portion of the front housing 1A that forms a cylinder. The ear pad 2 is made of an elastically deformable flexible member such as silicone rubber, and is curved toward the housing body at the front end of the cylindrical portion, and a cylindrical portion 2a having a substantially cylindrical shape fitted to the front outer peripheral portion of the housing. The skirt portion (ear pad outer surface portion) 2b extends.

上記イヤパッド２のスカート部２ｂと筒部２ａとの間には中空部が形成され、外耳道に挿入した際、スカート部２ｂが容易に変形自在となっている。このイヤパッド２は、耳道挿入時に円形の外径断面が耳道形状に対応して異なる変形率で弾性変形し、耳道内壁に接するようになっている。すなわち、図２に示すように、楕円形の実線で示す耳道１０の形状に対応するように、楕円長軸方向Ｙに対して楕円短軸方向Ｘの変形量が大きくなっている。   A hollow portion is formed between the skirt portion 2b and the cylindrical portion 2a of the ear pad 2, and the skirt portion 2b can be easily deformed when inserted into the ear canal. The ear pad 2 is configured such that when the ear canal is inserted, a circular outer diameter cross section elastically deforms at different deformation rates corresponding to the shape of the ear canal and comes into contact with the inner wall of the ear canal. That is, as shown in FIG. 2, the deformation amount in the elliptical minor axis direction X is larger than the elliptical major axis direction Y so as to correspond to the shape of the ear canal 10 indicated by the elliptical solid line.

上記フロントハウジング１Ａと上記リアハウジング１Ｂは、樹脂または金属で形成され、シリコーンリングやゴムリング等の気密部材（図示せず）を介在して一体化され、かつ両者が接着剤で接合されることで内部にドライバユニット４の収容空間が形成される。このハウジング内にはインナーハウジング３が収容され、さらにこのインナーハウジング３に音を発生する電気音響変換素子としてのドライバユニット４が収容されている。ドライバユニット４は磁気回路、振動板等を包有してなり、適宜の周知構造のものが用いられる。   The front housing 1A and the rear housing 1B are formed of resin or metal, are integrated with an airtight member (not shown) such as a silicone ring or a rubber ring, and both are joined with an adhesive. Thus, a housing space for the driver unit 4 is formed inside. An inner housing 3 is accommodated in the housing, and a driver unit 4 as an electroacoustic transducer that generates sound in the inner housing 3 is accommodated. The driver unit 4 includes a magnetic circuit, a diaphragm and the like, and has an appropriate known structure.

上記フロントハウジング１Ａにおける上記ドライバユニット４の放音方向側には放音孔１ａが設けられている。これにより上記ドライバユニット４から発生された音は、上記放音孔１ａを介してイヤパッド２の筒部２ａからハウジングの外部に放出される。   A sound emitting hole 1a is provided on the sound emitting direction side of the driver unit 4 in the front housing 1A. Thereby, the sound generated from the driver unit 4 is discharged from the cylindrical portion 2a of the ear pad 2 to the outside of the housing through the sound emitting hole 1a.

上記フロントハウジング１Ａの放音孔１ａの前面には、プロテクタ５が設けられている。そして、このプロテクタ５を挟むように、上記フロントハウジング１Ａの前方外周部にイヤパッド２が被着される。イヤパッド２のフロントハウジング１Ａへの取り付けには、フロントハウジング１Ａの放音孔１ａの外周に設けた溝部１ｂと、イヤパッド２の対応する位置の内周に設けた突起部２ｃとが着脱自在に嵌め込まれる。上記プロテクタ５の外周がイヤパッド２の対応する部分の開口幅よりも大きいことで、上記フロントハウジング１Ａとイヤパッド２でプロテクタ５が挟持されるようになっている。   A protector 5 is provided on the front surface of the sound emitting hole 1a of the front housing 1A. The ear pad 2 is attached to the front outer peripheral portion of the front housing 1A so as to sandwich the protector 5. To attach the ear pad 2 to the front housing 1A, a groove 1b provided on the outer periphery of the sound emitting hole 1a of the front housing 1A and a protrusion 2c provided on the inner periphery of the corresponding position of the ear pad 2 are detachably fitted. It is. Since the outer periphery of the protector 5 is larger than the opening width of the corresponding part of the ear pad 2, the protector 5 is held between the front housing 1 </ b> A and the ear pad 2.

上記プロテクタ５は、例えば中央と周辺に放音用の開孔を有する皿状の金属や樹脂等の硬質材料で形成され、放音孔１ａの前面に外側に向かって突出するように接着剤や両面テープ等で接着されている。このプロテクタ５は、ハウジングの内部に直接水滴が侵入しないようにする保護部材として機能する。   The protector 5 is formed of a hard material such as a dish-like metal or a resin having openings for sound emission at the center and the periphery, for example, and an adhesive agent or the like so as to protrude outward from the front surface of the sound emission hole 1a. Bonded with double-sided tape. The protector 5 functions as a protective member that prevents water droplets from directly entering the inside of the housing.

さらに、上記リアハウジング１Ｂの後方下部には、コード導出部１ｃが設けられており、上記ドライバユニット４に電気的に接続されたコード（イヤホンケーブル）６が、このコード導出部１ｃからハウジングの外部に導出されている。   Further, a cord lead-out portion 1c is provided at the rear lower part of the rear housing 1B, and a cord (earphone cable) 6 electrically connected to the driver unit 4 is connected to the outside of the housing from the cord lead-out portion 1c. Has been derived.

上記のような構成によれば、耳道挿入時に円形の外径断面が耳道形状に対応して異なる変形量で変形するので、人の耳道断面形状に対応する楕円形にイヤパッドが容易に弾性変形し、装着時の痛みや違和感、不快な脱落を防止することができる。よって、良好な装着感が得られる。   According to the above configuration, when the ear canal is inserted, the circular outer diameter cross section is deformed with different deformation amounts corresponding to the ear canal shape, and thus the ear pad can be easily formed into an elliptical shape corresponding to the human ear canal cross section shape. It is elastically deformed and can prevent pain, discomfort, and uncomfortable falling off when worn. Therefore, a good wearing feeling can be obtained.

また、耳道挿入時に円形の外径断面が耳道形状に対応する異なる変形量で変形するイヤパッドを用いることで、人の耳道断面形状に応じてイヤパッドが変形し耳道にフィットさせて密着させることができるので、意図していない漏洩を少なくして、所望の音圧周波数特性やノイズキャンセル性能を実現でき、音質の良好な再生音響の聴取を実現できる。   In addition, by using an earpad that has a circular outer diameter section that deforms with a different deformation amount corresponding to the ear canal shape when the ear canal is inserted, the ear pad deforms according to the human ear canal cross-sectional shape and fits into the ear canal and adheres Therefore, unintended leakage can be reduced, desired sound pressure frequency characteristics and noise cancellation performance can be realized, and reproduction sound with good sound quality can be realized.

図３（ａ）〜（ｃ）はそれぞれ、本発明の第１実施例に係るイヤパッドの正面図および断面図である。（ａ）図は正面図であり、（ｂ）図は（ａ）図のＡ１−Ａ１’線矢示断面図、（ｃ）図は（ａ）図のＢ１−Ｂ１’線矢示断面図である。本第１実施例は、耳道形状に対応する楕円形の変形を、柔軟性（硬度）の異なる２種類以上の材料を用いることで生成するものである。   FIGS. 3A to 3C are a front view and a cross-sectional view, respectively, of the earpad according to the first embodiment of the present invention. (A) is a front view, (b) is a cross-sectional view taken along line A1-A1 'in FIG. (A), and (c) is a cross-sectional view taken along line B1-B1' in FIG. is there. In the first embodiment, an elliptical deformation corresponding to the shape of the auditory canal is generated by using two or more kinds of materials having different flexibility (hardness).

本第１実施例では、楕円長軸方向Ｙに対して楕円短軸方向Ｘに軟らかい材料を使用することで、耳道挿入時に円形の外径断面が耳道形状に対応する楕円形になるようにしている。すなわち、図３（ａ）〜（ｃ）に示すように、イヤパッド２は、シリコーンゴム等からなるハード材部２−１と、このハード材部２−１の両側を挟んで配置され、同じくシリコーンゴム等からなるソフト材部２−２、２−３とで構成されている。   In the first embodiment, by using a soft material in the elliptical minor axis direction X with respect to the elliptical major axis direction Y, the circular outer diameter cross section becomes an elliptical shape corresponding to the auditory canal shape when the auditory canal is inserted. I have to. That is, as shown in FIGS. 3 (a) to 3 (c), the ear pad 2 is arranged with a hard material portion 2-1 made of silicone rubber or the like sandwiched between both sides of the hard material portion 2-1, and the It consists of soft material parts 2-2 and 2-3 made of rubber or the like.

上記ハード材部２−１をソフト材部２−２、２−３で挟んだ構造は、例えばダブルモールド（二色成形）で一体に成形している。一次側となるハード材部２−１を成形してから同一金型内で二次側となるソフト材部２−２、２−３を一次側と一体で成形することで、部分的に柔軟性の異なるイヤパッド２を形成できる。もちろん、硬度の異なる異材料どうしを組み合わせて一体に成形することもできる。   The structure in which the hard material part 2-1 is sandwiched between the soft material parts 2-2 and 2-3 is integrally formed by, for example, a double mold (two-color molding). By forming the hard material part 2-1 on the primary side and then forming the soft material parts 2-2 and 2-3 on the secondary side integrally with the primary side in the same mold, it is partially flexible Ear pads 2 having different properties can be formed. Of course, different materials having different hardnesses can be combined and molded integrally.

上記のような構成のイヤパッド２では、楕円長軸方向Ｙに対して楕円短軸方向Ｘに軟らかい材料を使用することで、上下方向に対して左右方向が変形し易く、人の耳道断面形状に応じた楕円形にイヤパッドを容易に変形させることができる。従って、装着時の痛みや違和感、不快な脱落を防止することができ、良好な装着感が得られる。   In the ear pad 2 configured as described above, by using a soft material in the elliptical minor axis direction X with respect to the elliptical major axis direction Y, the lateral direction is easily deformed in the vertical direction, and the human ear canal cross-sectional shape The ear pad can be easily deformed into an oval shape corresponding to the angle. Therefore, it is possible to prevent pain and discomfort during wearing and unpleasant dropout, and a good wearing feeling can be obtained.

図４（ａ）〜（ｃ）はそれぞれ、本発明の第２実施例に係るイヤパッドの正面図および断面図である。（ａ）図は正面図であり、（ｂ）図は（ａ）図のＡ２−Ａ２’線矢示断面図、（ｃ）図は（ａ）図のＢ２−Ｂ２’線矢示断面図である。本第２実施例は、耳道形状に対応する異なる変形量を、スカート部の肉厚を変えることで生成するものである。   4A to 4C are a front view and a cross-sectional view, respectively, of an earpad according to a second embodiment of the present invention. (A) is a front view, (b) is a cross-sectional view taken along line A2-A2 'in FIG. (A), and (c) is a cross-sectional view taken along line B2-B2' in FIG. is there. In the second embodiment, different deformation amounts corresponding to the ear canal shape are generated by changing the thickness of the skirt portion.

本第２実施例では、楕円短軸方向Ｘに対して楕円長軸方向Ｙのスカート部の内側肉厚を厚くすることで、耳道挿入時に円形の外径断面が耳道形状に対応するようにしている。すなわち、スカート部２ｂにおける上下方向の厚さｔ２に対して、左右方向の厚さｔ１を薄くしている。 In the second embodiment, the inner wall thickness of the skirt portion in the elliptical long axis direction Y with respect to the elliptical short axis direction X is increased so that the circular outer diameter cross section corresponds to the ear canal shape when the ear canal is inserted. I have to. That is, the thickness t 2 of the vertical direction of the skirt portion 2b, and thinned in the horizontal direction thickness t 1.

上記のような構成のイヤパッド２では、楕円長軸方向Ｙに対して楕円短軸方向Ｘのスカート部の内側肉厚を薄くすることで、上下方向より左右方向を変形し易くでき、人の耳道断面形状に応じた楕円形にイヤパッドを容易に変形させることができる。従って、装着時の痛みや違和感、不快な脱落を防止することができ、良好な装着感が得られる。また、第１実施例に比べて形状剛性のコントロールが容易であり、かつ１回でモールド成形できるので製造コストを削減して低コスト化できる。   In the ear pad 2 configured as described above, by reducing the inner thickness of the skirt portion in the elliptical minor axis direction X with respect to the elliptical major axis direction Y, the left and right directions can be more easily deformed than the vertical direction. The ear pad can be easily deformed into an oval shape corresponding to the road cross-sectional shape. Therefore, it is possible to prevent pain and discomfort during wearing and unpleasant dropout, and a good wearing feeling can be obtained. Further, the shape rigidity can be easily controlled as compared with the first embodiment, and the molding can be performed at a time, so that the manufacturing cost can be reduced and the cost can be reduced.

図５（ａ）〜（ｃ）はそれぞれ、本発明の第３実施例に係るイヤパッドの正面図および断面図である。（ａ）図は正面図であり、（ｂ）図は（ａ）図のＡ３−Ａ３’線矢示断面図、（ｃ）図は（ａ）図のＢ３−Ｂ３’線矢示断面図である。本第３実施例は、耳道形状に対応する異なる変形量を、スカート部と筒部との間に形成される中空部における、スカート部付け根の内壁の半径を変えることで生成するものである。   5A to 5C are a front view and a cross-sectional view, respectively, of an earpad according to a third embodiment of the present invention. (A) is a front view, (b) is a cross-sectional view taken along line A3-A3 ′ in FIG. (A), and (c) is a cross-sectional view taken along line B3-B3 ′ in FIG. is there. In the third embodiment, different deformation amounts corresponding to the shape of the ear canal are generated by changing the radius of the inner wall of the base of the skirt portion in the hollow portion formed between the skirt portion and the cylindrical portion. .

本第３実施例では、楕円短軸方向Ｘに対して楕円長軸方向Ｙのスカート部付け根の内側の半径を大きくすることで、耳道挿入時に円形の外径断面が耳道形状に対応するようにしている。すなわち、スカート部２ｂと筒部２ａとの間に形成される中空部における上下方向の中空部内面の半径ｒ２に対して、左右方向の半径ｒ１を小さくすることで変形し易くしている。 In the third embodiment, by increasing the inner radius of the skirt base in the elliptical long axis direction Y with respect to the elliptical short axis direction X, the circular outer diameter cross section corresponds to the auditory canal shape when the ear canal is inserted. I am doing so. In other words, the radius r 1 in the left-right direction is made smaller than the radius r 2 of the inner surface of the hollow portion in the vertical direction in the hollow portion formed between the skirt portion 2 b and the cylindrical portion 2 a to facilitate deformation. .

上記のような構成のイヤパッド２では、楕円長軸方向Ｙに対して楕円短軸方向Ｘのスカート部付け根の内側の半径を小さくすることで、上下方向より左右方向を変形し易くでき、人の耳道断面形状に応じた楕円形にイヤパッドを容易に変形させることができる。従って、装着時の痛みや違和感、不快な脱落を防止することができ、良好な装着感が得られる。また、第１実施例に比べて形状剛性のコントロールが容易であり、かつ１回でモールド成形できるので製造コストを削減して低コスト化できる。   In the ear pad 2 configured as described above, by reducing the inner radius of the skirt root in the elliptical minor axis direction X with respect to the elliptical major axis direction Y, the lateral direction can be more easily deformed than the vertical direction. The ear pad can be easily deformed into an oval shape corresponding to the cross-sectional shape of the ear canal. Therefore, it is possible to prevent pain and discomfort during wearing and unpleasant dropout, and a good wearing feeling can be obtained. Further, the shape rigidity can be easily controlled as compared with the first embodiment, and the molding can be performed at a time, so that the manufacturing cost can be reduced and the cost can be reduced.

図６（ａ）〜（ｄ）はそれぞれ、参考例のイヤパッドの正面図および断面図である。（ａ）図は正面図であり、（ｂ）図は（ａ）図のＡ４−Ａ４’線矢示断面図、（ｃ）図は（ａ）図のＢ４−Ｂ４’線矢示断面図である。また、（ｄ）図は（ｃ）図のＣ１−Ｃ１’線の位置に対応する正面方向から見た断面図である。本第４実施例は、耳道形状に対応する異なる変形量を、イヤパッドのスカート部内面に、複数の溝を形成することで生成するものである。 6A to 6D are a front view and a cross-sectional view, respectively, of an earpad of a reference example . (A) The figure is a front view, (b) The figure is an A4-A4 'line arrow sectional view of (a) figure, (c) The figure is a B4-B4' line arrow sectional view of (a) figure. is there. FIG. 4D is a cross-sectional view seen from the front direction corresponding to the position of the C1-C1 ′ line in FIG. In the fourth embodiment, different deformation amounts corresponding to the ear canal shape are generated by forming a plurality of grooves on the inner surface of the skirt portion of the ear pad.

すなわち、この参考例では、イヤパッド２におけるスカート部２ｂの内面に、楕円短軸方向Ｘに沿って複数の溝７−１〜７−６を形成することで、楕円長軸方向Ｙに対して楕円短軸方向Ｘを変形し易くし、耳道挿入時に円形の外径断面が耳道形状に対応するようにしている。 That is, in this reference example , by forming a plurality of grooves 7-1 to 7-6 along the elliptical short axis direction X on the inner surface of the skirt portion 2b of the earpad 2, the elliptical shape with respect to the elliptical long axis direction Y is formed. The minor axis direction X is easily deformed, and the circular outer diameter section corresponds to the ear canal shape when the ear canal is inserted.

上記のような構成のイヤパッド２では、楕円短軸方向Ｘに複数の溝を形成することで、人の耳道断面形状に応じた楕円形にイヤパッドを容易に変形させることができる。従って、装着時の痛みや違和感、不快な脱落を防止することができ、良好な装着感が得られる。また、第１実施例に比べて形状剛性のコントロールが容易であり、かつ１回でモールド成形できるので製造コストを削減して低コスト化できる。   In the ear pad 2 configured as described above, by forming a plurality of grooves in the minor axis direction X of the ellipse, the ear pad can be easily deformed into an ellipse according to the cross-sectional shape of the human ear canal. Therefore, it is possible to prevent pain and discomfort during wearing and unpleasant dropout, and a good wearing feeling can be obtained. Further, the shape rigidity can be easily controlled as compared with the first embodiment, and the molding can be performed at a time, so that the manufacturing cost can be reduced and the cost can be reduced.

図７（ａ）〜（ｄ）はそれぞれ、他の参考例のイヤパッドの正面図および断面図である。（ａ）図は正面図であり、（ｂ）図は（ａ）図のＡ５−Ａ５’線矢示断面図、（ｃ）図は（ａ）図のＢ５−Ｂ５’線矢示断面図である。また、（ｄ）図は（ｃ）図のＣ２−Ｃ２’線の位置に対応する正面方向から見た断面図である。本第５実施例は、耳道形状に対応する異なる変形量を、イヤパッドのスカート部内面に、複数のリブを形成することで生成するものである。 7A to 7D are a front view and a cross-sectional view, respectively, of an earpad of another reference example . (A) is a front view, (b) is a cross-sectional view taken along line A5-A5 'in FIG. (A), and (c) is a cross-sectional view taken along line B5-B5' in FIG. is there. Further, FIG. (D) is a cross-sectional view seen from the front direction corresponding to the position of line C2-C2 ′ in FIG. In the fifth embodiment, different deformation amounts corresponding to the ear canal shape are generated by forming a plurality of ribs on the inner surface of the skirt portion of the earpad.

すなわち、この参考例では、イヤパッド２におけるスカート部２ｂの内面に、楕円長軸方向Ｙに沿って複数のリブ８−１〜８−６を形成することで、楕円短軸方向Ｘに対して楕円長軸方向Ｙを変形し難くし、耳道挿入時に円形の外径断面が耳道形状に対応するようにしている。 That is, in this reference example , by forming a plurality of ribs 8-1 to 8-6 along the elliptical long axis direction Y on the inner surface of the skirt portion 2b of the earpad 2, an elliptical shape with respect to the elliptical short axis direction X is formed. The major axis direction Y is made difficult to deform, and the circular outer diameter section corresponds to the ear canal shape when the ear canal is inserted.

上記のような構成のイヤパッド２では、楕円長軸方向Ｙに複数のリブを形成することで、人の耳道断面形状に応じた楕円形にイヤパッドを容易に変形させることができる。従って、装着時の痛みや違和感、不快な脱落を防止することができ、良好な装着感が得られる。また、第１実施例に比べて形状剛性のコントロールが容易であり、かつ１回でモールド成形できるので製造コストを削減して低コスト化できる。   In the ear pad 2 configured as described above, by forming a plurality of ribs in the elliptical long axis direction Y, the ear pad can be easily deformed into an oval shape corresponding to the cross-sectional shape of the human ear canal. Therefore, it is possible to prevent pain and discomfort during wearing and unpleasant dropout, and a good wearing feeling can be obtained. Further, the shape rigidity can be easily controlled as compared with the first embodiment, and the molding can be performed at a time, so that the manufacturing cost can be reduced and the cost can be reduced.

なお、上記第１実施例では、硬さの異なるシリコーンゴムを用いる場合を例に取って説明したが、硬い材料と軟らかい材料の間に中間的な硬度の材料を介在させるなどして、三種類以上の材料を用いるようにしても良い。   In the first embodiment, the case where silicone rubbers having different hardnesses are used has been described as an example. However, there are three types by interposing a material having an intermediate hardness between a hard material and a soft material. You may make it use the above material.

また、必要に応じて上記第１乃至第３実施例で説明した構成の二つまたは三つを選択的に組み合わせても良いのはもちろんである。 Of course, two or three of the configurations described in the first to third embodiments may be selectively combined as necessary.

さらに、イヤパッド２の材料としてシリコーンゴムを使用する場合について述べたが、本発明はこれに限らず、例えば、ウレタン系樹脂やアクリル系樹脂等の種々の材料を使用するようにしても良い。   Furthermore, although the case where silicone rubber was used as a material of the ear pad 2 was described, the present invention is not limited to this, and various materials such as urethane resin and acrylic resin may be used.

更にまた、参考実施例では、イヤパッド２におけるスカート部２ｂの左右の内面または上下の内面に溝またはリブを３本ずつ設けたが、これら溝またはリブの本数、深さや高さ、幅などは必要とする特性に応じて設定すれば良い。また、溝またはリブの断面形状は四角形に限らず、三角形や半円形等でも良く、非形成領域に対して変形率を大きくあるいは小さくできれば実質的に同様な作用効果が得られる。更に、複数の溝またはリブが直線状で平行に配置される例を説明したが、放射状に配置しても良いのはもちろんである。 Furthermore, in the reference embodiment, three grooves or ribs are provided on the left and right inner surfaces or upper and lower inner surfaces of the skirt portion 2b of the ear pad 2, but the number, depth, height, width, etc. of these grooves or ribs are necessary. It may be set according to the characteristics. The cross-sectional shape of the groove or rib is not limited to a quadrangle, but may be a triangle or a semicircle. If the deformation rate can be increased or decreased with respect to the non-formation region, substantially the same effect can be obtained. Furthermore, although the example where a plurality of grooves or ribs are linearly arranged in parallel has been described, it goes without saying that they may be arranged radially.

１ イヤホン
１Ａ フロントハウジング
１Ｂ リアハウジング
１ａ 放音孔
１ｂ 溝部
１ｃ コード導出部
２ イヤパッド
２ａ 筒部
２ｂ スカート部（イヤパッド外面部）
２ｃ 突起部
２−１ ハード材部
２−２、２−３ ソフト材部
３ インナーハウジング
４ ドライバユニット
５ プロテクタ
６ コード（イヤホンケーブル）
７−１〜７−６ 溝
８−１〜８−６ リブ
１０ 耳道
Ｘ 楕円短軸方向
Ｙ 楕円長軸方向
ｔ１、ｔ２ 肉厚
ｒ１、ｒ２ 半径 DESCRIPTION OF SYMBOLS 1 Earphone 1A Front housing 1B Rear housing 1a Sound emission hole 1b Groove part 1c Cord extraction part 2 Ear pad 2a Tube part 2b Skirt part (ear pad outer surface part)
2c Protrusion part 2-1 Hard material part 2-2, 2-3 Soft material part 3 Inner housing 4 Driver unit 5 Protector 6 Cord (earphone cable)
7-1 to 7-6 Grooves 8-1 to 8-6 Rib 10 Ear canal X Ellipse minor axis direction Y Ellipse major axis direction t 1 , t 2 Thickness r 1 , r 2 radius

Claims (2)

インイヤータイプのイヤホン（１）に用いられ、耳道入り口に挿入されるイヤパッド（２）において、フロントハウジング（１Ａ）の前方外周部に装着される筒部（２ａ）と、筒部前端においてハウジング本体側に向かって湾曲して延びるスカート部（２ｂ）とを有し、前記スカート部は、円形の外径断面が耳道挿入時に耳道形状に対応して異なる変形率で弾性変形し耳道（１０）内壁に接し、前記異なる変形率は、柔軟性の異なる２種類以上の材料を用いることで生成し、楕円長軸方向（Ｙ）に対して楕円短軸方向（Ｘ）に軟らかい材料を使用するか、前記異なる変形率は、前記スカート部（２ｂ）の肉厚が異なることで生成し、楕円長軸方向（Ｙ）のスカート部（２ｂ）の肉厚（ｔ ２ ）に対して楕円短軸方向（Ｘ）の肉厚（ｔ １ ）が薄いか、または、前記異なる変形率は、前記スカート部（２ｂ）と前記筒部（２ａ）との間に形成される中空部における、スカート部（２ｂ）付け根の内壁の半径が異なることで生成し、楕円長軸方向（Ｙ）のスカート部（２ｂ）付け根の内壁の半径（ｒ ２ ）に対して楕円短軸方向（Ｘ）の内壁の半径（ｒ １ ）が小さいことを特徴とするイヤパッド。 In the ear pad (2) used for the in-ear type earphone (1) and inserted into the ear canal entrance, a cylindrical portion (2a) mounted on the front outer peripheral portion of the front housing (1A), and a housing main body at the front end of the cylindrical portion A skirt portion (2b) that curves and extends toward the side, and the skirt portion has a circular outer diameter section that is elastically deformed at a different deformation rate in accordance with the shape of the ear canal when the ear canal is inserted. 10) against the inner wall, the different deformation rate, generated by using two or more kinds of materials having different flexibility, a soft material to an ellipse minor axis direction (X) relative to the ellipse major axis direction (Y) The different deformation ratios used are generated by the thickness of the skirt portion (2b) being different and are elliptical to the thickness (t 2 ) of the skirt portion (2b) in the elliptical long axis direction (Y). Thin wall thickness (t 1 ) in the minor axis direction (X ) is thin The different deformation rate is generated by the difference in the radius of the inner wall of the base of the skirt (2b) in the hollow portion formed between the skirt (2b) and the tube (2a). An earpad characterized in that the radius (r 1 ) of the inner wall in the elliptical minor axis direction (X ) is smaller than the radius (r 2 ) of the inner wall of the base of the skirt (2b) in the major axis direction (Y) of the ellipse . 前記請求項１記載のイヤパッド（２）をフロントハウジング（１Ａ）の放音孔（１ａ）外周部に装着してなることを特徴とするインイヤータイプのイヤホン。   An in-ear type earphone, wherein the earpad (2) according to claim 1 is mounted on the outer periphery of the sound emitting hole (1a) of the front housing (1A).
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