JP2014146949A

JP2014146949A - Earphone

Info

Publication number: JP2014146949A
Application number: JP2013013917A
Authority: JP
Inventors: Satoru Iwasaki; 悟岩崎
Original assignee: Kyocera Corp
Current assignee: Kyocera Corp
Priority date: 2013-01-29
Filing date: 2013-01-29
Publication date: 2014-08-14

Abstract

PROBLEM TO BE SOLVED: To provide an earphone capable of enabling listening to both external sound and sound from an earphone and facilitating the emission of bass.SOLUTION: An earphone 1 includes: a cylindrical body 2; an ear pad 3 arranged at one end of the cylindrical body 2 and to be inserted to an external canal; and a transmission member 5 arranged in the side part of the cylindrical body 2 and mounting a piezoelectric element 4 for generating an acoustic vibration in response to an electric signal. The ear pad 3 includes: a vibration part 6 arranged at a place to be overlapped with a center part within an area enclosed by the cylindrical body 2 when viewed from one end side of the cylindrical body 2 toward the other end side of the cylindrical body 2, so as to be vibrated by receiving an acoustic vibration to be generated by the piezoelectric element 4; and multiple through-holes H arranged at places to be overlapped with a peripheral part enclosing the center part within the area enclosed by the cylindrical body 2, so as to communicate with a space inside the cylindrical body 2.

Description

本発明は、外界音、いわゆる外部の音を聞くことが可能なイヤホンに関する。 The present invention relates to an earphone capable of listening to external sounds, so-called external sounds.

従来から、イヤホンの一種として、音が頭蓋骨に振動して入り、蝸牛等の内耳を刺激し、蝸牛にて振動を電気信号に変換し脳に伝える骨伝導式のイヤホンが提案されている（下記、特許文献１，２参照）。なお、特許文献１，２には、筒状の貫通部の外側部に振動素子を設けたイヤホンが示されており、外部の音とイヤホンからの音を両方聞くことが可能な技術が提案されている。 Conventionally, as one type of earphone, a bone conduction type earphone has been proposed in which sound vibrates into the skull, stimulates the inner ear of the cochlea, etc., converts the vibration into an electrical signal in the cochlea and transmits it to the brain (see below) Patent Documents 1 and 2). Note that Patent Documents 1 and 2 show an earphone in which a vibration element is provided on the outer side of a cylindrical penetrating portion, and a technique that can hear both external sound and sound from the earphone is proposed. ing.

特開２００４−２０８２２０号公報JP 2004-208220 A 特開２００７−１０３９８９号公報JP 2007-103989 A

ところが、特許文献１，２の技術は、イヤホンを人体の外耳道に嵌める構造であるが、外耳道内の空間が貫通部を介して大気中に露出された構造となる。そのため、１ｋＨｚ以下の低音を聞こうとしても、外耳道内で音がこもりにくく、低音を出すことが難しい。 However, the techniques of Patent Documents 1 and 2 are structures in which the earphone is fitted into the external auditory canal of the human body, but the structure in which the space in the external auditory canal is exposed to the atmosphere through the penetration portion. For this reason, even when trying to listen to a low frequency of 1 kHz or less, it is difficult for the sound to remain in the ear canal and it is difficult to produce a low frequency.

本発明は、外部の音とイヤホンからの音を両方聞くことが可能であって、低音を出しやすくすることが可能なイヤホンを提供することを目的とする。 An object of the present invention is to provide an earphone that can hear both an external sound and a sound from an earphone and can easily produce a low sound.

上記課題を解決するために、本発明の一実施形態に係るイヤホンは、筒体と、前記筒体の一端に設けられた、外耳道に挿入するイヤーパッドと、前記筒体の側部に設けられた、電気信号に応じて音響振動を発生する圧電素子が実装された伝達部材と、を備え、前記イヤーパッドは、前記筒体の一端側から他端側に向かって見たときに、前記筒体で囲まれる領域のうち中央部分と重なる箇所に、前記圧電素子が発生する音響振動を受けて振動する振動部分と、前記筒体で囲まれる領域のうち前記中央部分を取り囲む周辺部分と重なる箇所に、前記筒体内の空間とつながる複数の貫通孔と、を備えたことを特徴とする。 In order to solve the above-described problem, an earphone according to an embodiment of the present invention is provided at a cylindrical body, an ear pad provided at one end of the cylindrical body, and inserted into an ear canal, and at a side portion of the cylindrical body. A transmission member mounted with a piezoelectric element that generates acoustic vibrations in response to an electrical signal, and the ear pad is formed by the cylindrical body when viewed from one end side to the other end side of the cylindrical body. In a portion that overlaps the central portion of the surrounded region, a vibration portion that vibrates in response to the acoustic vibration generated by the piezoelectric element, and a portion that overlaps a peripheral portion surrounding the central portion of the region surrounded by the cylindrical body, And a plurality of through holes connected to the space in the cylindrical body.

本発明によれば、外部の音とイヤホンからの音を両方聞くことが可能であって、低音を出しやすくすることが可能なイヤホンを提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the earphone which can hear both the external sound and the sound from an earphone and can make a low-pitched sound easily can be provided.

本実施形態に係るイヤホンを左の耳に装着した状態を示した概観図である。It is the general-view figure which showed the state with which the earphone which concerns on this embodiment was mounted | worn with the left ear | edge. 本実施形態に係るイヤホンの概観図である。1 is an overview diagram of an earphone according to an embodiment. 本実施形態に係るイヤホンの平面図であって、イヤーパッド側から筒体側を見た状態を示している。It is a top view of the earphone which concerns on this embodiment, Comprising: The state which looked at the cylinder side from the ear pad side is shown. 図２のＸ−Ｘに沿った、イヤホンの断面図である。FIG. 3 is a cross-sectional view of the earphone along XX in FIG. 2. 図４の筒体および伝達部材を示した断面図である。It is sectional drawing which showed the cylinder and the transmission member of FIG. 図４のイヤーパッドの取付部在を示した断面図である。It is sectional drawing which showed the attachment part presence of the ear pad of FIG. 図４のイヤーパッドの弾性変形部材を示した断面図である。It is sectional drawing which showed the elastic deformation member of the ear pad of FIG. 図４の伝達部材および圧電素子を示した断面図である。It is sectional drawing which showed the transmission member and piezoelectric element of FIG. 第一変形例に係るイヤホンを左の耳に装着した状態を示した概観図である。It is the general-view figure which showed the state with which the earphone which concerns on a 1st modification was mounted | worn with the left ear. 第一変形例に係るイヤホンの断面図であって、図４に相当する。It is sectional drawing of the earphone which concerns on a 1st modification, Comprising: It corresponds to FIG. 図１０のイヤーパッドの取付部在を示した断面図である。It is sectional drawing which showed the attachment part presence of the ear pad of FIG. 第二変形例に係るイヤホンの断面図であって、図４に相当する。It is sectional drawing of the earphone which concerns on a 2nd modification, Comprising: It corresponds to FIG. 図１２のイヤーパッドの取付部在および弾性変形部材を示した断面図である。It is sectional drawing which showed the attachment part presence and elastic deformation member of the ear pad of FIG.

以下に添付図面を参照して、本発明にかかるイヤホンの実施形態を説明する。なお、本発明は以下の実施形態に限定されないものとする。図１は、本実施形態に係るイヤホンを人の左耳に装着した状態を示している。図２は、本実施形態に係るイヤホンであって、筒体、イヤーパッドおよび伝達部材を示した概観斜視図である。図３は、本実施形態に係るイヤホンの平面図であって、イヤーパッド側から筒体側を見た状態を示している。図４は、図２のＸ−Ｘに沿ったイヤホンの断面図を示しており、筒体、イヤーパッドおよび伝達部材の断面を示している。図５は、図４の断面図において筒体および伝達部材を示している。図６は、図４の断面図においてイヤーパッドの取付部在を示している。図７は、図４の断面図においてイヤーパッドの弾性変形部材を示している。図８は、図４の断面図に相当した伝達部材および圧電素子を示している。 Embodiments of an earphone according to the present invention will be described below with reference to the accompanying drawings. In addition, this invention shall not be limited to the following embodiment. FIG. 1 shows a state in which the earphone according to the present embodiment is worn on the left ear of a person. FIG. 2 is an overview perspective view showing the cylindrical body, the ear pad, and the transmission member of the earphone according to the present embodiment. FIG. 3 is a plan view of the earphone according to the present embodiment, showing a state in which the cylindrical body side is viewed from the ear pad side. FIG. 4 shows a cross-sectional view of the earphone along the line XX in FIG. 2, and shows cross-sections of the cylindrical body, the ear pad, and the transmission member. FIG. 5 shows the cylinder and the transmission member in the cross-sectional view of FIG. FIG. 6 shows the location of the ear pad attachment in the cross-sectional view of FIG. FIG. 7 shows an elastic deformation member of the ear pad in the cross-sectional view of FIG. FIG. 8 shows a transmission member and a piezoelectric element corresponding to the cross-sectional view of FIG.

＜イヤホンの構成＞
本実施形態に係るイヤホン１は、例えば、スマートフォン、ポータブルオーディオプレーヤーまたはポータブルメディアプレーヤー等の携帯音楽端末や、ラジオ等の無線通信端末に用いるものであって、耳に装着して使用する。 <Configuration of earphone>
The earphone 1 according to the present embodiment is used for a portable music terminal such as a smartphone, a portable audio player or a portable media player, or a wireless communication terminal such as a radio, and is used by being worn on the ear.

イヤホン１は、筒体２と、筒体２の一端に設けられた、外耳道に挿入するイヤーパッド３と、筒体２の側部に設けられた、電気信号に応じて音響振動を発生する圧電素子４が実装された伝達部材５と、を備えている。イヤーパッド３は、筒体２の一端側から筒体２の他端側を見たときに、筒体２で囲まれる領域のうち中央部分と重なる箇所に、圧電素子４が発生する音響振動を受けて振動する振動部分６と、筒体２で囲まれる領域のうち中央部分を取り囲む周辺部分と重なる箇所に、筒体２内の空間とつながる複数の貫通孔Ｈと、を備えている。また、イヤーパッド３は、一部が筒体２の一端の外縁に沿って取り付けられる取付部在３１と、取付部在３１の表面をカバーした弾性変形部材３２と、を備えている。 The earphone 1 includes a cylindrical body 2, an ear pad 3 that is provided at one end of the cylindrical body 2, and a piezoelectric element that is provided at a side portion of the cylindrical body 2 and generates acoustic vibration in response to an electrical signal. And a transmission member 5 on which 4 is mounted. The ear pad 3 receives acoustic vibration generated by the piezoelectric element 4 at a position overlapping the central portion of the region surrounded by the cylindrical body 2 when the other end side of the cylindrical body 2 is viewed from one end side of the cylindrical body 2. And a plurality of through-holes H connected to the space in the cylindrical body 2 are provided at locations overlapping the peripheral portion surrounding the central portion of the region surrounded by the cylindrical body 2. In addition, the ear pad 3 includes an attachment portion 31 that is partially attached along the outer edge of one end of the cylindrical body 2, and an elastic deformation member 32 that covers the surface of the attachment portion 31.

筒体２は、円筒状であって、一端にイヤーパッド３を設けて、イヤーパッド３側を外耳道にはめて用いるものである。筒体２は、空洞Ｔが設けられている。そして、筒体２を外耳道にはめたときには、空洞Ｔによって外耳道内と外耳道外との空間がつながっている。なお、筒体２は、本実施形態では円筒状としたが、内側に空洞Ｔがあって人の耳に挿入可能であれば、形状は円筒状に限定されない。 The cylindrical body 2 has a cylindrical shape, and is provided with an ear pad 3 at one end, and the ear pad 3 side is fitted to the ear canal. The cylindrical body 2 is provided with a cavity T. When the tubular body 2 is fitted to the ear canal, the space between the inside of the ear canal and the outside of the ear canal is connected by the cavity T. In addition, although the cylindrical body 2 was made into the cylindrical shape in this embodiment, if the cavity T exists inside and can be inserted in a human ear, a shape is not limited to a cylindrical shape.

また、筒体２は、人体と触れても無害な材料から構成されており、例えば、ポリエチレン、ポリプロピレン、ポリスチレンまたはＡＢＳ樹脂等からなる。筒体２は、円筒状の外径が６ｍｍ以上２０ｍｍ以下であって、内径が５ｍｍ以上１９ｍｍ以下に設定されている。筒体２は、筒体２の一端から筒体２の他端までの長さが４ｍｍ以上２０ｍｍ以下に設定されている。 Moreover, the cylinder 2 is comprised from a harmless material even if it touches a human body, for example, consists of polyethylene, a polypropylene, a polystyrene, or ABS resin. The cylindrical body 2 has a cylindrical outer diameter of 6 mm to 20 mm and an inner diameter of 5 mm to 19 mm. The cylindrical body 2 has a length from one end of the cylindrical body 2 to the other end of the cylindrical body 2 set to 4 mm or more and 20 mm or less.

筒体２は、筒体２の側面から筒体２の円筒状の軸と直交する方向に延在した延在部２ａを有している。延在部２ａは、伝達部材５が設けられている。伝達部材５は、延在部２ａ上に、接合部材７を介して設けられた圧電素子４を備えている。ここで、筒体２の円筒状の軸とは、空洞Ｔの軸方向と同軸である。なお、延在部２ａは、筒体２と一体であっても
別体であっても構わない。かかる場合は、延在部２ａは、筒体２の側面に、例えば、エポキシ樹脂、アクリル樹脂、シリコンまたはウレタンゴム等からなる接着材を介して接続される。 The cylindrical body 2 has an extending portion 2 a that extends from the side surface of the cylindrical body 2 in a direction orthogonal to the cylindrical axis of the cylindrical body 2. The extending part 2 a is provided with a transmission member 5. The transmission member 5 includes a piezoelectric element 4 provided on the extending portion 2 a via a bonding member 7. Here, the cylindrical axis of the cylindrical body 2 is coaxial with the axial direction of the cavity T. In addition, the extension part 2a may be integral with the cylinder 2, or may be a separate body. In such a case, the extending portion 2a is connected to the side surface of the cylindrical body 2 via an adhesive made of, for example, an epoxy resin, an acrylic resin, silicon, urethane rubber, or the like.

延在部２ａは、矩形状の板状である。延在部２ａは、例えば、剛性および弾性が大きい合成樹脂等の材料を好適に用いて形成することができる。そして、圧電素子４の音響振動は、接合部材７を介して延在部２ａに伝わり、伝達部材５全体を振動させることができる。なお、延在部２ａは、例えば、エポキシ樹脂、アクリル樹脂、シリコンまたはウレタンゴム等の絶縁材料から構成されている。また、延在部２ａは、板状であって、例えば一辺の長さが１５ｍｍ以上５０ｍｍ以下であって、幅が３ｍｍ以上１１ｍｍ以下、厚みが１ｍｍ以上１０ｍｍ以下に形成されている。 The extending part 2a has a rectangular plate shape. The extending portion 2a can be formed by suitably using, for example, a material such as a synthetic resin having high rigidity and elasticity. And the acoustic vibration of the piezoelectric element 4 is transmitted to the extending part 2a via the joining member 7, and the whole transmission member 5 can be vibrated. In addition, the extension part 2a is comprised from insulating materials, such as an epoxy resin, an acrylic resin, a silicon | silicone, or urethane rubber, for example. Moreover, the extension part 2a is plate shape, for example, the length of one side is 15 mm or more and 50 mm or less, the width is 3 mm or more and 11 mm or less, and the thickness is 1 mm or more and 10 mm or less.

圧電素子４は、バイモルフ構造を有する圧電体で構成されている。圧電素子４は、分極された複数の圧電体層と複数の電極層とが交互に積層された構造である。そして、圧電素子４は、一方主面および他方主面が屈曲するように屈曲振動することで、音響振動が発生する。また、圧電素子４は、例えば、長さが１０ｍｍ以上４０ｍｍ以下、幅が２ｍｍ以上１０ｍｍ以下、厚みが０．３ｍｍ以上５ｍｍ以下の直方体状の形状に設定されている。なお、圧電素子４を構成する圧電体層は、例えば、ジルコン酸鉛、チタン酸ジルコン酸鉛、Ｂｉ層状化合物またはタングステンブロンズ構造化合物等の非鉛系圧電体材料等から成る。圧電素子４を構成する電極層は、例えば、銀またはパラジウムが含まれた合金や、この合金にセラミック成分やガラス成分を含有させたものから成る。 The piezoelectric element 4 is composed of a piezoelectric body having a bimorph structure. The piezoelectric element 4 has a structure in which a plurality of polarized piezoelectric layers and a plurality of electrode layers are alternately stacked. Then, the piezoelectric element 4 undergoes bending vibration so that the one main surface and the other main surface are bent, thereby generating acoustic vibration. In addition, the piezoelectric element 4 is set in a rectangular parallelepiped shape having a length of 10 mm to 40 mm, a width of 2 mm to 10 mm, and a thickness of 0.3 mm to 5 mm, for example. The piezoelectric layer constituting the piezoelectric element 4 is made of, for example, a lead-free piezoelectric material such as lead zirconate, lead zirconate titanate, Bi layered compound, or tungsten bronze structure compound. The electrode layer constituting the piezoelectric element 4 is made of, for example, an alloy containing silver or palladium, or an alloy containing a ceramic component or glass component in this alloy.

圧電素子４は、例えば次のような方法によって作製することができる。まず、圧電材料の粉末にバインダー、分散剤、可塑剤および溶剤を添加して掻き混ぜて、スラリーを作製し、得られたスラリーをシート状に成形し、グリーンシートを作製する。次に、グリーンシートに導体ペーストを印刷して電極層パターンを形成し、この電極層パターンが形成されたグリーンシートを積層して、積層成形体を作製した後に、脱脂、焼成し、所定寸法にカットすることにより積層体を得る。次に、表面電極を形成するための導体ペーストを印刷し、所定の温度で焼付けた後に、電極層を通じて直流電圧を印加して圧電体層の分極を行う。このようにして、圧電素子４を得ることができる。 The piezoelectric element 4 can be manufactured by the following method, for example. First, a binder, a dispersing agent, a plasticizer, and a solvent are added to the piezoelectric material powder and stirred to prepare a slurry, and the obtained slurry is formed into a sheet shape to prepare a green sheet. Next, a conductive paste is printed on the green sheet to form an electrode layer pattern, and the green sheet on which the electrode layer pattern is formed is laminated to produce a laminated molded body, which is then degreased and fired to a predetermined size. A laminated body is obtained by cutting. Next, a conductive paste for forming a surface electrode is printed and baked at a predetermined temperature, and then a direct current voltage is applied through the electrode layer to polarize the piezoelectric layer. In this way, the piezoelectric element 4 can be obtained.

圧電素子４は、延在部２ａ上に接合部材７を介して設けられている。接合部材７は、フィルム状の形状を有しており、圧電素子４の屈曲振動の振幅よりも大きい厚みを有している。また、接合部材７は、延在部２ａよりも柔らかく変形しやすいもので形成されており、延在部２ａよりもヤング率、剛性率または体積弾性率等の弾性率や剛性が小さい。すなわち、接合部材７は、変形可能であり、延在部２ａよりも変形しやすい。なお、接合部材７は、圧電素子４の全周を取り囲むように設けられている。圧電素子４の全周を取り囲むように接合部材７を設けることで、圧電素子４と延在部２ａとの接続強度を向上させることができ、圧電素子４が延在部２ａから剥離しにくくすることができる。さらに、圧電素子４の振動を延在部２ａに効率よく伝えることができる。 The piezoelectric element 4 is provided on the extending portion 2a via a bonding member 7. The joining member 7 has a film shape and has a thickness larger than the amplitude of bending vibration of the piezoelectric element 4. The joining member 7 is formed of a material that is softer and more easily deformed than the extending portion 2a, and has a smaller elastic modulus and rigidity such as Young's modulus, rigidity, or bulk elastic modulus than the extending portion 2a. That is, the joining member 7 can be deformed and is more easily deformed than the extending portion 2a. The joining member 7 is provided so as to surround the entire circumference of the piezoelectric element 4. By providing the bonding member 7 so as to surround the entire circumference of the piezoelectric element 4, the connection strength between the piezoelectric element 4 and the extending part 2a can be improved, and the piezoelectric element 4 is less likely to peel from the extending part 2a. be able to. Furthermore, the vibration of the piezoelectric element 4 can be efficiently transmitted to the extending portion 2a.

接合部材７は、図８に示すように、２層の粘着層７１ａ，７１ｂと、これらの間に配置された基部層７２とからなる３層構造を有している。そして、延在部２ａの上面に接合部材７の下面（粘着層７１ａ）が全体的に固定されているとともに、圧電素子４の下面に接合部材７の上面（粘着層７１ｂ）が全体的に固定されている。 As shown in FIG. 8, the bonding member 7 has a three-layer structure including two adhesive layers 71 a and 71 b and a base layer 72 disposed therebetween. The lower surface (adhesive layer 71a) of the bonding member 7 is fixed to the upper surface of the extending portion 2a, and the upper surface (adhesive layer 71b) of the bonding member 7 is fixed to the lower surface of the piezoelectric element 4. Has been.

粘着層７１ａ，７１ｂは、粘弾性体で構成されており、その厚みは、例えば１０μｍ以上５０μｍ以下に設定される。粘着層７１ａ，７１ｂを構成する粘弾性体としては、例えばアクリル樹脂、シリコンまたはウレタンゴム等の高分子材料からなる。 The adhesive layers 71a and 71b are made of a viscoelastic body, and the thickness thereof is set to, for example, 10 μm or more and 50 μm or less. The viscoelastic body constituting the adhesive layers 71a and 71b is made of a polymer material such as acrylic resin, silicon or urethane rubber.

基部層７２は、粘着層７１ａ，７１ｂよりも高い剛性を有しており、その厚みは、例えば５０μｍ以上２００μｍ以下に設定される。基部層７２は、ポリエステル等の樹脂を好適に用いて構成することができるが、例えば、粘着層７１ａ，７１ｂを構成する粘弾性体および不織布によって基部層７２を構成することが望ましい。 The base layer 72 has higher rigidity than the adhesive layers 71a and 71b, and the thickness thereof is set to, for example, 50 μm or more and 200 μm or less. The base layer 72 can be configured by suitably using a resin such as polyester. For example, it is desirable that the base layer 72 is configured by a viscoelastic body and a nonwoven fabric that form the adhesive layers 71a and 71b.

また、基部層７２は、不織布と粘着材とで構成されたもの、より詳細には、不織布に粘着材が含浸されたものであることが望ましい。そして、基部層７２の厚み方向（２層の粘着層７１ａ，７１ｂの一方から他方へ向かう方向）の全体に渡って、少なくとも一部が粘弾性体で構成されていることが望ましい。これにより、延在部２ａと圧電素子４の間に働く熱応力を緩和する効果と、圧電素子４の振動を延在部２ａへ伝達する効果の両方を高めることができる。 The base layer 72 is preferably composed of a nonwoven fabric and an adhesive material, more specifically, the nonwoven fabric is impregnated with an adhesive material. It is desirable that at least a part of the base layer 72 is formed of a viscoelastic body over the entire thickness direction (direction from one of the two adhesive layers 71a and 71b to the other). Thereby, both the effect of relaxing the thermal stress acting between the extending part 2a and the piezoelectric element 4 and the effect of transmitting the vibration of the piezoelectric element 4 to the extending part 2a can be enhanced.

伝達部材５は、圧電素子４から音響振動が発生させる。音響振動は、筒体２を介してイヤーパッド３に伝わる。また、伝達部材５は、耳にあてると軟骨を介して内耳に音を良好に伝達することができる。具体的には、圧電素子４が電気信号を受けて音響振動を発生し、その音響振動が筒体２に伝わり、イヤーパッド３の振動部分６を振動させる。また、筒体２を外耳道に嵌めた状態で、一部が耳珠近傍に当接し、耳珠近傍の軟骨および皮膚に音響振動を伝達することもできる。 The transmission member 5 generates acoustic vibration from the piezoelectric element 4. The acoustic vibration is transmitted to the ear pad 3 through the cylindrical body 2. Further, when the transmission member 5 is applied to the ear, the transmission member 5 can satisfactorily transmit sound to the inner ear via the cartilage. Specifically, the piezoelectric element 4 receives an electric signal to generate acoustic vibration, and the acoustic vibration is transmitted to the cylindrical body 2 to vibrate the vibrating portion 6 of the ear pad 3. Further, in a state where the cylindrical body 2 is fitted in the external auditory canal, a part of the cylindrical body 2 abuts on the vicinity of the tragus, and acoustic vibration can be transmitted to the cartilage and skin near the tragus.

伝達部材５は、筒体２の側面に設けられ、延在部２ａに設けられている。なお、伝達部材５は、エポキシ樹脂、アクリル樹脂、シリコンまたはウレタンゴム等の樹脂でコーティングされても良い。さらに、使用者に耳の形状に合わせて、伝達部材５の位置を調整して位置決めされている。 The transmission member 5 is provided on the side surface of the cylindrical body 2 and is provided in the extending portion 2a. The transmission member 5 may be coated with a resin such as an epoxy resin, an acrylic resin, silicon, or urethane rubber. Furthermore, the position of the transmission member 5 is adjusted by the user according to the shape of the ear.

伝達部材５は、圧電素子４を制御する信号が伝わる電気配線８が接続されている。そして、電気配線８の一端が、圧電素子４と接続されている。また、電気配線８の他端が、圧電素子４を制御する電気回路や圧電素子４に電源を供給する電源と電気的に接続されている。 The transmission member 5 is connected to an electrical wiring 8 through which a signal for controlling the piezoelectric element 4 is transmitted. One end of the electrical wiring 8 is connected to the piezoelectric element 4. The other end of the electrical wiring 8 is electrically connected to an electrical circuit that controls the piezoelectric element 4 and a power source that supplies power to the piezoelectric element 4.

イヤーパッド３は、人の耳介内に挿入した状態では、伝達部材５からの音響振動を気導音に変換して人に伝えることができ、さらに外部からの音を人に伝えるものである。イヤーパッド３は、図１に示すように、筒体２で囲まれる領域の中央部分と重なる箇所に、伝達部材５からの音響振動を受けて振動する振動部分６と、中央部分を取り囲む周辺部分と重なる箇所に、筒体２内の空洞Ｔとつながる複数の貫通孔Ｈ（Ｈ１，Ｈ２）とを備えている。また、イヤーパッド３は、具体的には、取付部在３１と、取付部在３１に取り付けられた弾性変形部材３２とを備えている。取付部在３１は、一部が筒体２の一端の外縁に沿って取り付けられている。弾性変形部材３２は、取付部在３１の表面をカバーしている。 When the ear pad 3 is inserted into the human auricle, the ear pad 3 can convert the acoustic vibration from the transmission member 5 into air conduction sound and transmit it to the person, and further transmit sound from the outside to the person. As shown in FIG. 1, the ear pad 3 includes a vibrating portion 6 that vibrates in response to acoustic vibration from the transmission member 5, and a peripheral portion that surrounds the central portion, at a position overlapping the central portion of the region surrounded by the cylinder 2. A plurality of through-holes H (H1, H2) connected to the cavity T in the cylindrical body 2 are provided at the overlapping portions. Further, the ear pad 3 specifically includes an attachment portion 31 and an elastic deformation member 32 attached to the attachment portion 31. A part of the attachment portion 31 is attached along the outer edge of one end of the cylindrical body 2. The elastic deformation member 32 covers the surface of the attachment portion 31.

取付部在３１は、イヤーパッド３の一部であって、筒体２の一端に取り付けるものである。取付部在３１は、筒体２の一端側から筒体２の他端側の方向に延在した円筒部３１ａを有しており、イヤーパッド３の振動部分６が円筒部３１ａの延在した基部に設けられている。取付部在３１は、円筒部３１ａの一端側の端部を塞ぐように振動部分６が設けられている。さらに、取付部在３１は、円筒部３１ａの他端側の端部から側方に広がるように、支持部３１ｂが設けられている。支持部３１ｂの外延部は、筒体２の一端の外縁に沿って取り付けられる。取付部在３１は、弾性変形可能であって、例えば、エポキシ樹脂、アクリル樹脂、シリコンまたはウレタンゴム等の樹脂からなる。さらに、取付部在３１の円筒部３１ａの一端側の端部を塞ぐ振動部分６は、例えば、カーボン、液晶ポリマーフィルムまたはカーボンナノチューブ等の振動膜から構成されても良い。 The attachment portion 31 is a part of the ear pad 3 and is attached to one end of the cylindrical body 2. The attachment portion 31 has a cylindrical portion 31a extending from one end side of the cylindrical body 2 toward the other end side of the cylindrical body 2, and the vibrating portion 6 of the ear pad 3 is a base portion where the cylindrical portion 31a extends. Is provided. The attachment portion 31 is provided with a vibrating portion 6 so as to close an end portion on one end side of the cylindrical portion 31a. Furthermore, the attachment portion 31 is provided with a support portion 31b so as to spread laterally from the end portion on the other end side of the cylindrical portion 31a. The outer extension part of the support part 31 b is attached along the outer edge of one end of the cylindrical body 2. The attachment portion 31 is elastically deformable, and is made of, for example, a resin such as epoxy resin, acrylic resin, silicon, or urethane rubber. Furthermore, the vibrating portion 6 that closes the end portion on the one end side of the cylindrical portion 31a of the mounting portion 31 may be made of a vibrating membrane such as carbon, a liquid crystal polymer film, or a carbon nanotube.

筒体２が圧電素子４からの音響振動によって振動し、筒体２に連結された取付部在が振
動し、嵌合に連結された振動部分６が振動する。さらに、振動部分６と外耳道との間で空気が振動して鼓膜を震わせることができる。つまり、イヤーパッド３を外耳道に嵌めると、振動部分６の振動が鼓膜と振動部分６との間の空気を震わせて、気導音が外耳道内の鼓膜を振動させることができる。なお、取付部在３１は、円筒部３１ａの外径が３ｍｍ以上７ｍｍ以下であって、内径が２ｍｍ以上６ｍｍ以下に設定されている。取付部在３１は、一端側から他端側までの長さが、６ｍｍ以上１５ｍｍ以下に設定されている。 The cylindrical body 2 vibrates due to the acoustic vibration from the piezoelectric element 4, the attachment portion connected to the cylindrical body 2 vibrates, and the vibrating portion 6 coupled to the fitting vibrates. Furthermore, air can vibrate and vibrate the eardrum between the vibrating portion 6 and the ear canal. That is, when the ear pad 3 is fitted into the ear canal, the vibration of the vibration part 6 vibrates the air between the eardrum and the vibration part 6, and the air conduction sound can vibrate the eardrum in the ear canal. In addition, as for the attachment part location 31, the outer diameter of the cylindrical part 31a is 3 mm or more and 7 mm or less, and an internal diameter is set to 2 mm or more and 6 mm or less. The length of the attachment portion 31 from one end side to the other end side is set to 6 mm or more and 15 mm or less.

また、支持部３１ｂには、複数の貫通孔Ｈ１が設けられている。貫通孔Ｈ１は、筒体２の一端側から筒体２の他端側をみたときに、円筒部３ａｙを中心として放射状に配置されている。貫通孔Ｈ１の大きさは、筒体２の一端側から筒体２の他端側を見たときに、矩形状に形成されており、一辺の長さが０．２ｍｍ以上４ｍｍ以下に設定されている。貫通孔Ｈ１の深さは、周囲の部材の厚みに相当し、例えば０．５ｍｍ以上３ｍｍ以下に設定されている。なお、本実施形態では、貫通孔Ｈ１の一方から見た形状を矩形状としたが、例えば、円状や楕円状等であってもよい。 Further, the support portion 31b is provided with a plurality of through holes H1. The through holes H1 are arranged radially around the cylindrical portion 3ay when the other end side of the cylindrical body 2 is viewed from one end side of the cylindrical body 2. The size of the through hole H1 is formed in a rectangular shape when the other end side of the cylindrical body 2 is viewed from one end side of the cylindrical body 2, and the length of one side is set to 0.2 mm or more and 4 mm or less. ing. The depth of the through hole H1 corresponds to the thickness of the surrounding member, and is set to, for example, 0.5 mm or more and 3 mm or less. In the present embodiment, the shape viewed from one of the through holes H1 is a rectangular shape, but may be, for example, a circular shape or an elliptical shape.

弾性変形部材３２は、外耳道にはめて、外耳道の皮膚表面と直接接するものである。弾性変形部材３２は、取付部在３１の表面の多くをカバーするものである。弾性変形部材３２は、変形可能な弾性体から構成されていることで、人の力で簡単に変形させて外耳道内に嵌めることができる。また、弾性変形部材３２の一端は、図７に示すように、外耳道に嵌めやすいように湾曲して、外耳道の内面が傷つかないように調整されている。また、弾性変形部材３２の他端には、端面が開口している空洞部３２ｈが設けられている。 The elastic deformation member 32 is attached to the ear canal and directly contacts the skin surface of the ear canal. The elastic deformation member 32 covers most of the surface of the attachment portion 31. Since the elastic deformation member 32 is made of a deformable elastic body, the elastic deformation member 32 can be easily deformed by human force and fitted into the ear canal. Further, as shown in FIG. 7, one end of the elastic deformation member 32 is curved so as to be easily fitted into the ear canal, and is adjusted so that the inner surface of the ear canal is not damaged. Further, the other end of the elastic deformation member 32 is provided with a hollow portion 32h having an open end surface.

また、弾性変形部材３２の他端は、図４に示すように、弾性変形部材３２の他端側は、取付部在３１と間を空けて設けられている。弾性変形部材３２は、空洞部３２ｈと貫通孔Ｈ２とつながっており、弾性変形部材３２において弾性変形部材３２の一端側の空間と弾性変形部材３２の他端側の空間とはつながっている。イヤーパッド３を外耳道に嵌めた状態では、空洞部３２ｈは外界とつながっており、外部の音が空洞部３２ｈから貫通孔Ｈ２を通って鼓膜に伝わる。 Further, as shown in FIG. 4, the other end of the elastic deformation member 32 is provided at a distance from the attachment portion 31 at the other end of the elastic deformation member 32. The elastic deformation member 32 is connected to the hollow portion 32 h and the through hole H <b> 2, and in the elastic deformation member 32, the space on one end side of the elastic deformation member 32 and the space on the other end side of the elastic deformation member 32 are connected. In a state where the ear pad 3 is fitted in the ear canal, the cavity 32h is connected to the outside world, and external sound is transmitted from the cavity 32h to the eardrum through the through hole H2.

弾性変形部材３２は、図７に示すように、取付部在３１の円筒部３１ａを嵌めることが可能な中央孔Ｃが設けられている。弾性変形部材３２の中央孔Ｃに取付部在３１の円筒部３１ａを嵌めた状態で、弾性変形部材３２の一端側に振動部分６が位置する。また、弾性変形部材３２は、筒体２の一端側から筒体２の他端側をみたときに、筒体２で囲まれる領域である中央部分を取り囲む周辺部分と重なる箇所に、筒体２内の空洞Ｔとつながった複数の貫通孔Ｈ２が設けられている。そして、取付部在３１の貫通穴Ｈ１と弾性変形部材３２の貫通穴Ｈ２の間には空間としての空洞部３２ｈがあり、貫通孔Ｈ２と貫通孔Ｈ１の位置がずれても、空間的につながっているので、外部の音を鼓膜に伝えることができる。 As shown in FIG. 7, the elastic deformation member 32 is provided with a central hole C into which the cylindrical portion 31 a of the attachment portion 31 can be fitted. The vibration portion 6 is located on one end side of the elastic deformation member 32 in a state where the cylindrical portion 31 a of the attachment portion 31 is fitted in the central hole C of the elastic deformation member 32. In addition, the elastic deformation member 32 is located at a location overlapping the peripheral portion surrounding the central portion that is the region surrounded by the cylindrical body 2 when the other end side of the cylindrical body 2 is viewed from one end side of the cylindrical body 2. A plurality of through holes H2 connected to the inner cavity T are provided. There is a hollow portion 32h as a space between the through hole H1 of the attachment portion 31 and the through hole H2 of the elastic deformation member 32, and even if the positions of the through hole H2 and the through hole H1 are shifted, they are spatially connected. Because, it can convey external sound to the eardrum.

貫通孔Ｈ２は、貫通孔Ｈ１と繋がっており、弾性変形部材３２の中央孔Ｃを中心として放射状に配置されている。貫通孔Ｈ２の大きさは、筒体２の一端側から筒体２の他端側を見たときに、矩形状に形成されており、一辺の長さが０．２ｍｍ以上４ｍｍ以下に設定されている。貫通孔Ｈ２の深さは、周囲の部材の厚みに相当し、例えば０．５ｍｍ以上１０ｍｍ以下に設定されている。なお、本実施形態では、貫通孔Ｈ２の一方から見た形状を矩形状としたが、例えば、円状や楕円状等であってもよい。 The through holes H <b> 2 are connected to the through holes H <b> 1, and are arranged radially about the central hole C of the elastic deformation member 32. The size of the through hole H2 is formed in a rectangular shape when the other end side of the cylindrical body 2 is viewed from one end side of the cylindrical body 2, and the length of one side is set to 0.2 mm or more and 4 mm or less. ing. The depth of the through hole H2 corresponds to the thickness of the surrounding member, and is set to, for example, 0.5 mm or more and 10 mm or less. In the present embodiment, the shape viewed from one of the through holes H2 is rectangular, but may be, for example, circular or elliptical.

弾性変形部材３の一端は、弾性変形部材３の他端に比べて外径が小さくなるように形成されている。弾性変形部材３の一端を小さくすることで、弾性変形部材３の一端を外耳道内に嵌めやすくすることができる。さらに、弾性変形部材３の一端と弾性変形部材３の他端との間には、外径が弾性変形部材３の他端よりも小さくなっている箇所を形成されていても構わない。弾性変形部材３の一端と弾性変形部材３の他端との間に、弾性変形部材３
の他端の外径よりも小さくなっている箇所を設けることで、外耳道の形状は複雑にカーブするように鼓膜につながっているが、外耳道の複雑な形状に対応するように嵌まりやすくすることができる。 One end of the elastic deformation member 3 is formed to have a smaller outer diameter than the other end of the elastic deformation member 3. By making one end of the elastic deformation member 3 small, one end of the elastic deformation member 3 can be easily fitted into the ear canal. Further, a portion where the outer diameter is smaller than the other end of the elastic deformation member 3 may be formed between one end of the elastic deformation member 3 and the other end of the elastic deformation member 3. Between the one end of the elastic deformation member 3 and the other end of the elastic deformation member 3, the elastic deformation member 3
By providing a portion that is smaller than the outer diameter of the other end of the earpiece, the shape of the ear canal is connected to the eardrum so as to curve in a complicated manner, but it should be easy to fit so as to correspond to the complicated shape of the ear canal Can do.

また、弾性変形部材３は、弾性変形可能であって、例えば、エポキシ樹脂、アクリル樹脂、シリコンまたはウレタンゴム等の樹脂からなる。弾性変形部材３は、円筒状の外径が８ｍｍ以上１５ｍｍ以下であって、内径が３ｍｍ以上７ｍｍ以下に設定されている。弾性変形部材３は、弾性変形部材３の一端から他端までの長さが６ｍｍ以上１５ｍｍ以下に設定されている。 The elastic deformation member 3 can be elastically deformed, and is made of, for example, a resin such as an epoxy resin, an acrylic resin, silicon, or urethane rubber. The elastic deformation member 3 has a cylindrical outer diameter of 8 mm to 15 mm and an inner diameter of 3 mm to 7 mm. The elastic deformation member 3 has a length from one end of the elastic deformation member 3 to the other end of 6 mm to 15 mm.

本実施形態に係るイヤホン１は、外耳道にイヤーパッド３を嵌めた状態で、伝達部材５で発生させた音響振動を筒体２を介してイヤーパッド３の振動部分６に伝え、振動部分６を振動させる。そして、振動部分６にて気導音を発生させて、外耳道内の鼓膜に気導音を伝えることができる。さらに、筒体２内の空間としての空洞Ｔとつながったイヤーパッド３の貫通孔Ｈ２、Ｈ１を通って、外界音を鼓膜に伝えることができる。その結果、イヤホン１を使用した場合は、音響振動による気導音と外部の外界音の両方を鼓膜に伝えて、人に音を伝えることができる。そして、イヤーパッド３を外耳道に嵌めた状態では、鼓膜と振動部分６との間に僅かな隙間を設けて、その隙間で音を鼓膜と振動部分６との間でこもらせて共振させやすくすることができ、低音を発生させることができる。そこで、本実施形態に係るイヤホン１によれば、鼓膜を塞ぐように振動部分６を設けて、鼓膜と振動部分６との間に僅かな隙間をつくり出すことで、１ｋＨｚ以下の低音を共振させやすくすることができる。 The earphone 1 according to the present embodiment transmits the acoustic vibration generated by the transmission member 5 to the vibrating portion 6 of the ear pad 3 through the cylindrical body 2 in a state where the ear pad 3 is fitted in the ear canal, and vibrates the vibrating portion 6. . Then, the air conduction sound can be generated in the vibrating portion 6 to transmit the air conduction sound to the eardrum in the ear canal. Furthermore, external sounds can be transmitted to the eardrum through the through holes H2 and H1 of the ear pad 3 connected to the cavity T as a space in the cylindrical body 2. As a result, when the earphone 1 is used, the sound can be transmitted to a person by transmitting both the air conduction sound due to the acoustic vibration and the external external sound to the eardrum. When the ear pad 3 is fitted in the ear canal, a slight gap is provided between the eardrum and the vibration part 6, and the sound is confined between the eardrum and the vibration part 6 through the gap to facilitate resonance. Can generate bass. Therefore, according to the earphone 1 according to the present embodiment, the vibration part 6 is provided so as to block the eardrum, and a slight gap is created between the eardrum and the vibration part 6 so that a bass sound of 1 kHz or less can be easily resonated. can do.

また、イヤホン１を外耳道内に嵌めた状態で、振動部分６を取付部在３１の一端に設けて、鼓膜と振動部分６との間の距離を短くなるようにすることができる。そして、振動部分６と鼓膜との間の僅かな隙間をより小さくすることができ、その僅かな隙間内で音をよりこもりやすくすることができ、良質な低音を発生させやすくすることができる。 In addition, with the earphone 1 fitted in the ear canal, the vibration portion 6 can be provided at one end of the attachment portion 31 so that the distance between the eardrum and the vibration portion 6 can be shortened. The slight gap between the vibrating portion 6 and the eardrum can be further reduced, and the sound can be more easily stored in the slight gap, so that high-quality bass can be easily generated.

本実施形態に係るイヤホン１は、複数の貫通孔Ｈは、図１に示すように、筒体２の空洞Ｔの中央部分を中心として放射状に配置したことで、外界音が鼓膜に伝わるまでの音について偏りを発生させにくくすることができる。貫通孔Ｈがイヤーパッド３に偏って配置されていた場合は、鼓膜に偏った方向から音が伝わろうとするため、音をきれいに聞き取りにくくなる。そこで、イヤーパッド３に偏りが発生しないように、複数の貫通孔Ｈを設けることで、複数の貫通孔Ｈを介して音がスムーズに鼓膜まで伝わることができ、外界音を聞き取りやすくすることが出来る。また、複数の貫通孔Ｈは、取付部在３１および弾性変形部材３２の両方を貫通して設けられていることで、外界音がスムーズに貫通孔Ｈを介して鼓膜に伝えることができる。 In the earphone 1 according to the present embodiment, as shown in FIG. 1, the plurality of through-holes H are arranged radially with the central portion of the cavity T of the cylindrical body 2 as a center until the external sound is transmitted to the eardrum. It is possible to make it difficult for the sound to be biased. When the through-hole H is arranged in the ear pad 3, the sound tends to be transmitted from the direction deviated from the eardrum, so that it is difficult to hear the sound neatly. Therefore, by providing a plurality of through holes H so that the ear pad 3 is not biased, the sound can be smoothly transmitted to the eardrum through the plurality of through holes H, and it is possible to easily hear external sounds. . Further, since the plurality of through holes H are provided so as to penetrate both the attachment portion 31 and the elastically deformable member 32, external sound can be smoothly transmitted to the eardrum through the through hole H.

本実施形態に係るイヤホン１は、イヤーパッド３を外耳道に嵌めて使用した状態で、外耳道外に位置する伝達部材５の一部が耳珠に当接するとさらによい。伝達部材の振動が耳珠を振動させ、耳の軟骨を経由して蝸牛に伝わり、音に変換される。また、伝達部材５の振動が筒体２に伝達し、筒体２が振動することで取付部在３１が振動すると、弾性変形部材３２を介して耳の外耳道を振動させ、伝達された振動が耳の外耳道の表面を振動させ、外耳道表面で気導音が発生し、鼓膜まで到達する。さらに、弾性変形部材３２を介して外耳道を振動させることで、伝達された振動が軟骨を経由して蝸牛に伝わり、音に変換される。 The earphone 1 according to the present embodiment is further preferable when a part of the transmission member 5 located outside the ear canal is in contact with the tragus in a state where the ear pad 3 is fitted to the ear canal and used. The vibration of the transmission member vibrates the tragus and is transmitted to the cochlea via the ear cartilage and converted into sound. Further, when the vibration of the transmission member 5 is transmitted to the cylinder 2 and the mounting portion 31 is vibrated by the vibration of the cylinder 2, the ear canal is vibrated via the elastic deformation member 32, and the transmitted vibration is transmitted. The surface of the ear canal is vibrated, air conduction sound is generated on the surface of the ear canal and reaches the eardrum. Furthermore, by vibrating the ear canal through the elastic deformation member 32, the transmitted vibration is transmitted to the cochlea via the cartilage and converted into sound.

イヤーパッド３は、外耳道に嵌まることで、人の上下運動の動作によっても外れにくく、良好に耳介に固定し続けることができる。また、仮にイヤーパッド３そのものが大きく振動する構造と比較して、イヤーパッド３そのものが大きく振動することがなく、外耳道
の表面とこすれて徐々に外れ落ちるような虞を低減することができる。さらに、耳珠に接触する伝達部材５に圧電素子４を設けて、伝達部材５そのものを振動させて、イヤーパッド３や筒体２が振動しにくい構造を実現することができる。 By fitting the ear pad 3 into the external auditory canal, it is difficult to come off even by the movement of a person's up and down movement, and can be satisfactorily fixed to the auricle. In addition, as compared with a structure in which the ear pad 3 itself vibrates greatly, the ear pad 3 itself does not vibrate greatly, and the possibility that the ear pad 3 rubs against the surface of the ear canal and gradually falls off can be reduced. Furthermore, the piezoelectric element 4 is provided in the transmission member 5 that contacts the tragus, and the transmission member 5 itself is vibrated, thereby realizing a structure in which the ear pad 3 and the cylindrical body 2 are less likely to vibrate.

また、圧電素子４を用いた場合は、骨伝導スピーカーと異なり、圧電素子にて発生される音響振動が小さくてすむ。そのため、耳珠近傍に圧電素子４を配置しても、使用者の顔が振動しすぎることがなく、頭蓋骨を振動させにくくすることができる。その結果、使用者が長時間使用しても頭痛が発生するような虞が少なく、長時間快適に使用することができる。 Further, when the piezoelectric element 4 is used, unlike the bone conduction speaker, the acoustic vibration generated by the piezoelectric element can be reduced. Therefore, even if the piezoelectric element 4 is disposed in the vicinity of the tragus, the user's face does not vibrate excessively, and the skull can be made difficult to vibrate. As a result, even if the user uses it for a long time, there is little possibility that a headache will occur, and it can be used comfortably for a long time.

なお、本発明は上述の形態に限定されるものではなく、本発明の要旨を逸脱しない範囲において種々の変更、改良等が可能である。以下、本発明の実施形態の変形例について説明する。なお、本発明の実施形態の変形例に係るイヤホンのうち、本発明の実施形態に係るイヤホンと同様な部分については、同一の符号を付して適宜説明を省略する。なお、イヤーパッドは、ポリウレタン等のスポンジであってもよい。 In addition, this invention is not limited to the above-mentioned form, A various change, improvement, etc. are possible in the range which does not deviate from the summary of this invention. Hereinafter, modifications of the embodiment of the present invention will be described. Note that, among the earphones according to the modified example of the embodiment of the present invention, the same parts as those of the earphone according to the embodiment of the present invention are denoted by the same reference numerals, and description thereof will be omitted as appropriate. The ear pad may be a sponge such as polyurethane.

＜第一変形例＞
図９、図１０および図１１は、第一変形例に係るイヤホン１ｘに関する。図９は、第一変形例に係るイヤホン１ｘを人の左耳に装着した状態であって、図１に相当する。図１０は、第一変形例に係るイヤホン１ｘであって、図４に相当する。図１１は、第一変形例に係るイヤホン１ｘの取付部在３１ｘであって、図６に相当する。 <First modification>
9, FIG. 10 and FIG. 11 relate to the earphone 1x according to the first modification. FIG. 9 shows a state in which the earphone 1x according to the first modification is worn on the left ear of a person, and corresponds to FIG. FIG. 10 shows the earphone 1x according to the first modification, which corresponds to FIG. FIG. 11 shows the attachment portion 31x of the earphone 1x according to the first modification, which corresponds to FIG.

上述した実施形態では、イヤーパッド３の弾性変形部材３２にのみ、貫通孔Ｈ２を設けた構造であったが、これに限られない。第一変形例に係るイヤホン１ｘは、取付部在３１ｘの振動部分６の保持部３１ａｘにも貫通孔Ｈ２が設けられても良い。 In the embodiment described above, the through hole H2 is provided only in the elastically deformable member 32 of the ear pad 3, but this is not a limitation. In the earphone 1x according to the first modification, the through hole H2 may be provided also in the holding portion 31ax of the vibration portion 6 of the attachment portion 31x.

第一変形例に係るイヤホン１ｘは、イヤーパッド１ｘを筒体２の一端側から筒体２の他端側をみたときに、筒体２で囲まれる領域の中央部分を取り囲む周辺部分と重なる箇所に、筒体２内の空間とつながる複数の貫通孔Ｈを有している。イヤーパッド１ｘの取付部在３１ｘは、円筒部３１ａｘから支持部３１ｂｘにかけて設けられた貫通孔Ｈ１１と、支持部３１ｂｘに設けられた貫通孔Ｈ１２とを有している。 In the earphone 1x according to the first modification, when the ear pad 1x is viewed from the one end side of the cylindrical body 2 to the other end side of the cylindrical body 2, the earphone 1x overlaps with a peripheral portion surrounding the central portion of the region surrounded by the cylindrical body 2. A plurality of through holes H connected to the space in the cylindrical body 2 are provided. The attachment portion 31x of the ear pad 1x has a through hole H11 provided from the cylindrical portion 31ax to the support portion 31bx and a through hole H12 provided in the support portion 31bx.

貫通孔Ｈ１１，Ｈ１２は、筒体２の空洞Ｔとつながっている。そして、外部の音が、筒体２の空洞Ｔをとおって、さらに貫通孔Ｈ１１をとおって鼓膜に伝わる。貫通孔Ｈ１１をとおる音は、イヤーパッド３ｘの弾性変形部材３２ｘに邪魔されずに、スムーズに鼓膜にまで伝わるため、外部の音をより聞きやすくすることができる。 The through holes H11 and H12 are connected to the cavity T of the cylindrical body 2. And an external sound is transmitted to the eardrum through the hollow T of the cylinder 2, and further through the through-hole H11. Since the sound passing through the through hole H11 is smoothly transmitted to the eardrum without being interrupted by the elastic deformation member 32x of the ear pad 3x, it is possible to make the external sound easier to hear.

＜第二変形例＞
図１２および図１３は、第二変形例に係るイヤホン１ｙに関する。図１２は、第二変形例に係るイヤホン１ｙの断面図であって、図４に相当する。図１３は、第二変形例に係るイヤホン１ｙの断面図であって、図１２のイヤーパッド３ｙである。 <Second modification>
12 and 13 relate to the earphone 1y according to the second modification. FIG. 12 is a cross-sectional view of the earphone 1y according to the second modification, and corresponds to FIG. FIG. 13 is a cross-sectional view of the earphone 1y according to the second modification, and is the ear pad 3y of FIG.

上述した実施形態および第一変形例では、イヤーパッド３、３ｘに空洞部３２ｈ、３２ｈｘが設けられていたが、これに限られない。第二変形例に係るイヤホン１ｙは、イヤーパッド３ｙの弾性変形部材３２ｙに空洞部が存在しなくても良い。 In the embodiment and the first modification described above, the cavity portions 32h and 32hx are provided in the ear pads 3 and 3x, but the present invention is not limited thereto. In the earphone 1y according to the second modified example, the elastic deformation member 32y of the ear pad 3y may not have a hollow portion.

第二変形例に係るイヤホン１ｙは、弾性変形部材３２ｙの端部が取付部在３２ｙの支持部３１ｂｙと接続しているとともに、取付部在３２ｙの貫通孔Ｈ１ｙと弾性変形部材３２ｙの貫通孔Ｈ２ｙとが一致している構造である。弾性変形部材３２ｙの端部の端面に空洞部を設けないことで、上述した実施形態のように、空洞部３２ｈを介して外界と貫通孔Ｈ
２とをつなげないことができる。空洞部をなくしたことで、イヤーパッド３ｙを外耳道に嵌めた状態で、鼓膜と振動部分６との間から音が空洞部を介して漏れでにくくすることができる。その結果、鼓膜と振動部分６との間で発生させた低音が外部に漏れでにくく、良質な低音を発生させやすくすることができる。 In the earphone 1y according to the second modified example, the end portion of the elastic deformation member 32y is connected to the support portion 31by of the attachment portion 32y, and the through hole H1y of the attachment portion 32y and the through hole H2y of the elastic deformation member 32y. Is a structure that matches. By not providing the cavity portion on the end face of the end portion of the elastic deformation member 32y, the outside world and the through hole H are interposed via the cavity portion 32h as in the above-described embodiment.
2 can not be connected. By eliminating the hollow portion, it is possible to make it difficult for sound to leak from between the eardrum and the vibrating portion 6 through the hollow portion with the ear pad 3y fitted in the ear canal. As a result, the bass generated between the eardrum and the vibrating portion 6 is not easily leaked to the outside, and a good bass can be easily generated.

１イヤホン
２筒体
２ａ延在部
３イヤーパッド
３１取付部在
３１ａ円筒部
３１ｂ支持部
３２弾性変形部材
３２ｈ空洞部
４圧電素子
５伝達部材
６振動部分
７接合部材
８電気配線
Ｈ貫通孔
Ｔ空洞
Ｃ中央孔
DESCRIPTION OF SYMBOLS 1 Earphone 2 Cylindrical body 2a Extension part 3 Ear pad 31 Attachment part location 31a Cylindrical part 31b Support part 32 Elastic deformation member 32h Cavity part 4 Piezoelectric element 5 Transmission member 6 Vibration part 7 Joining member 8 Electrical wiring H Through-hole T Cavity C Center Hole

Claims

A cylinder,
Ear pads provided at one end of the cylindrical body and inserted into the ear canal,
A transmission member provided on a side portion of the cylindrical body and mounted with a piezoelectric element that generates acoustic vibration in response to an electrical signal;
The ear pad vibrates in response to acoustic vibration generated by the piezoelectric element at a position overlapping with a central portion of a region surrounded by the cylindrical body when viewed from one end side to the other end side of the cylindrical body. An earphone comprising: a vibrating portion that includes a plurality of through holes connected to a space in the cylindrical body at a portion that overlaps a peripheral portion surrounding the central portion of a region surrounded by the cylindrical body.

The earphone according to claim 1,
The earphones are characterized in that the plurality of through holes are arranged radially around the central portion when the ear pad is viewed from one end side to the other end side of the cylindrical body.

The earphone according to claim 1 or 2,
The earphone includes an attachment member that is partly attached along an outer edge of one end of the cylindrical body, and an elastic deformation member attached to the attachment member.

The earphone according to claim 3,
The attachment member has a cylindrical portion extending in a direction from one end side to the other end side of the cylindrical body, and the vibration portion is provided on a base portion where the cylindrical portion extends. A featured earphone.

The earphone according to any one of claims 1 to 4,
The earphone characterized in that a part of the transmission member contacts the tragus in a state where the ear pad is inserted into the ear canal.