JP5486714B2

JP5486714B2 - headphone

Info

Publication number: JP5486714B2
Application number: JP2013078848A
Authority: JP
Inventors: 美智仁朝倉; 織彰仁平
Original assignee: Tohoku Pioneer Corp; Pioneer Corp
Current assignee: Tohoku Pioneer Corp; Pioneer Corp
Priority date: 2013-04-04
Filing date: 2013-04-04
Publication date: 2014-05-07
Anticipated expiration: 2028-10-02
Also published as: JP2013158038A

Description

本発明は、例えば、人の頭に掛けて用いられるヘッドホンに関する。 The present invention relates to a headphone that is used, for example, on a person's head.

人の頭に掛けて用いられるヘッドホンとして、従来から種々のヘッドホン（例えば、特許文献１参照）が用いられてきた。この特許文献１に示されたヘッドホンは、音を生じさせるスピーカユニットを収容した一対の放音部と、前記放音部を支持したブリッジ状のハンガと、人の頭に掛けられるヘッドバンドと、前記ハンガをヘッドバンドに対して回転自在に支持する回転支持部と、を備えている。 Conventionally, various headphones (see, for example, Patent Document 1) have been used as headphones used on a person's head. The headphone disclosed in Patent Document 1 includes a pair of sound emitting units that house a speaker unit that generates sound, a bridge-shaped hanger that supports the sound emitting unit, a headband that is hung on a person's head, A rotation support portion that rotatably supports the hanger with respect to the headband.

前述したヘッドホンは、回転支持部が、放音部を任意の向きに位置付けることで、当該放音部を頭に密着させて、スピーカユニットが発生させる再生音を人の耳に導くようにしている。 In the headphone described above, the rotation support portion positions the sound emitting portion in an arbitrary direction so that the sound emitting portion is brought into close contact with the head, and the reproduced sound generated by the speaker unit is guided to the human ear. .

実公昭６３−２０２３３号公報Japanese Utility Model Publication No. 63-20233

前述した特許文献１に示されたヘッドホンは、放音部が回転支持部によりばねなどで付勢されることなく回転自在に設けられているので、放音部のヘッドバンドに対する向きが変化しやすかった。このために、放音部が回転支持部の回転許容範囲を超えやすくなり、不意に、回転支持部やハンガが破損しやすかった。 In the headphone disclosed in Patent Document 1 described above, since the sound emitting part is rotatably provided without being urged by a spring or the like by the rotation support part, the direction of the sound emitting part with respect to the headband is easily changed. It was. For this reason, the sound emission part is likely to exceed the rotation allowable range of the rotation support part, and the rotation support part and the hanger are easily damaged.

本発明は、このような問題点に対処することを課題の一例とするものである。本発明の目的は、例えば、不意な破損を抑止することができるヘッドホンを提供することにある。 This invention makes it an example of a subject to cope with such a problem. An object of the present invention is to provide a headphone that can suppress, for example, unexpected breakage.

前記課題を解決し目的を達成するために、請求項１に記載の本発明のヘッドホンは、
ヘッドバンドと、
音を放射する放音部と、
前記放音部を支持する腕部と、
前記ヘッドバンドに対して前記腕部を第１の軸芯周りに回転させる第１の連結部と、
前記ヘッドバンドに対して前記腕部を前記第１の軸芯に垂直な第２の軸芯周りに回転させる第２の連結部と、
を備え、
前記第１の軸芯周りに前記腕部が回転することによって，前記第２の軸芯および前記第２の連結部が該第１の軸芯周りに回転することを特徴としている。 In order to solve the problems and achieve the object, the headphones of the present invention according to claim 1 are:
A headband,
A sound emitting part that emits sound;
An arm portion that supports the sound emitting portion;
A first connecting portion for rotating the arm portion around a first axis with respect to the headband;
A second connecting portion for rotating the arm portion around a second axis perpendicular to the first axis with respect to the headband;
With
When the arm rotates around the first axis, the second axis and the second connecting part rotate around the first axis.

本発明の一実施例にかかるヘッドホンの斜視図である。It is a perspective view of the headphones concerning one example of the present invention. 図１中のＩＩ部に示された第１及び第２の連結部、維持機構などを裏側からみた斜視図である。It is the perspective view which looked at the 1st and 2nd connection part, maintenance mechanism, etc. which were shown by the II section in FIG. 1 from the back side. 図２に示された第１及び第２の連結部、維持機構などの分解斜視図である。It is a disassembled perspective view of the 1st and 2nd connection part, maintenance mechanism, etc. which were shown by FIG. 図２に示された第１及び第２の連結部、維持機構などの他の分解斜視図である。FIG. 4 is another exploded perspective view of the first and second connecting portions and the maintenance mechanism shown in FIG. 2. 図４に示された維持機構などの分解斜視図である。It is a disassembled perspective view of the maintenance mechanism etc. which were shown by FIG. 図１に示されたヘッドホンの第３の連結部及び第２維持機構などの分解斜視図である。FIG. 4 is an exploded perspective view of a third connection part and a second maintenance mechanism of the headphones shown in FIG. 1. 図６に示された第３の連結部及び第２維持機構の要部を示す分解斜視図である。It is a disassembled perspective view which shows the principal part of the 3rd connection part and 2nd maintenance mechanism which were shown by FIG. 図６に示された第３の連結部及び第２維持機構の要部を示す断面図である。It is sectional drawing which shows the principal part of the 3rd connection part and 2nd maintenance mechanism which were shown by FIG. 図３に示されたねじりコイルばねが腕部を中立位置に位置付けている状態を説明する斜視図である。It is a perspective view explaining the state which the torsion coil spring shown by FIG. 3 has located the arm part in the neutral position. 図３に示されたねじりコイルばねが腕部を中立位置に向かって付勢している状態を説明する斜視図である。It is a perspective view explaining the state which the torsion coil spring shown by FIG. 3 is urging | biasing an arm part toward a neutral position. 図４に示された維持機構などを示す断面図である。It is sectional drawing which shows the maintenance mechanism etc. which were shown by FIG. 図１１に示された放音部が折りたたまれた状態を示す断面図である。It is sectional drawing which shows the state by which the sound emission part shown by FIG. 11 was folded. 図８に示された第３の連結部及び第２維持機構の変形例の要部を示す断面図である。It is sectional drawing which shows the principal part of the modification of the 3rd connection part shown by FIG. 8, and a 2nd maintenance mechanism. 図７に示された第３の連結部及び第２維持機構の変形例の要部を示す分解斜視図である。It is a disassembled perspective view which shows the principal part of the modification of the 3rd connection part shown by FIG. 7, and a 2nd maintenance mechanism. 図１２に示された第１の連結部の接続用穴などを示す斜視図である。It is a perspective view which shows the hole for a connection of the 1st connection part shown by FIG. 図１５に示された第１の連結部の接続用穴などを示す他の斜視図である。FIG. 16 is another perspective view showing a connection hole and the like of the first connecting portion shown in FIG. 15. 図１に示されたヘッドホンの第３の連結部及び第２維持機構などの他の分解斜視図である。FIG. 6 is another exploded perspective view of the third connection part and the second maintenance mechanism of the headphones shown in FIG. 1. 図６に示された第３の連結部及び第２維持機構の要部を示す斜視図である。It is a perspective view which shows the principal part of the 3rd connection part shown by FIG. 6, and a 2nd maintenance mechanism. 図１８に示された第３の連結部及び第２維持機構の要部を断面で示す斜視図である。It is a perspective view which shows the principal part of the 3rd connection part shown by FIG. 18, and a 2nd maintenance mechanism in a cross section. 本発明の一実施例にかかるヘッドホンのイヤパットの斜視図である。It is a perspective view of the ear pad of the headphones concerning one example of the present invention. 図２０中のＸＸＩ部を拡大して示すイヤパットの断面図である。It is sectional drawing of the ear pad which expands and shows the XXI part in FIG.

以下、本発明の一実施形態を説明する。本発明の一実施形態にかかるヘッドホンは、
ヘッドバンドと、音を放射する放音部と、放音部を支持する腕部と、ヘッドバンドに対して腕部を第１の軸芯周りに回転させる第１の連結部と、ヘッドバンドに対して腕部を第１の軸芯に垂直な第２の軸芯周りに回転させる第２の連結部と、を備え、第１の軸芯周りに腕部が回転することによって、第２の軸芯および第２の連結部が第１の軸芯周りに回転することを特徴としている。 Hereinafter, an embodiment of the present invention will be described. The headphones according to one embodiment of the present invention are:
A headband, a sound emitting unit that emits sound, an arm unit that supports the sound emitting unit, a first connecting unit that rotates the arm unit around the first axis with respect to the headband, and a headband And a second connecting portion that rotates the arm portion around a second axis that is perpendicular to the first axis, and the arm portion rotates around the first axis so that the second The shaft core and the second connecting portion rotate around the first shaft core.

また、第２の軸芯は、腕部の幅方向に延びているのが好ましい。 Moreover, it is preferable that the 2nd axial center is extended in the width direction of the arm part.
また、第２の連結部は腕部に備えられているのが好ましい。 Moreover, it is preferable that the 2nd connection part is provided in the arm part.

また、第１の軸芯は、ヘッドバンドの幅方向に垂直な方向に延びているのが好ましい。 Moreover, it is preferable that the first axis extends in a direction perpendicular to the width direction of the headband.
また、第１の軸芯周りに腕部が回転することによって、第２の軸芯は、第１の軸芯と垂直な面に沿って回転するのが好ましい。 In addition, it is preferable that the second axis is rotated along a plane perpendicular to the first axis when the arm is rotated around the first axis.

また、第１の軸芯と第２の軸芯とは、第２の連結部にて交わるのが好ましい。 Moreover, it is preferable that the first axis and the second axis intersect at the second connecting portion.
また、前記第２の連結部は、前記第２の軸芯を中心軸とする円柱形状を含むのが好ましい。 Moreover, it is preferable that the said 2nd connection part contains the column shape which makes the said 2nd axial center a central axis.

また、放音部の使用時に腕部が第１の軸芯周りに回転された際、腕部がヘッドバンドに対して中立位置となるように腕部を付勢する付勢手段を有するのが好ましい。 In addition, when the sound emitting unit is used, the arm unit has a biasing unit that biases the arm unit so that the arm unit is in a neutral position with respect to the headband when the arm unit is rotated around the first axis. preferable.

また、腕部がヘッドバンドに対して中立位置にある場合、第１の軸芯はヘッドバンドから腕部に向かう方向と平行であることが好ましい。 Further, when the arm portion is in a neutral position with respect to the headband, the first axis is preferably parallel to the direction from the headband toward the arm portion.

また、第２の軸芯周りの回転によって、放音部が展開された位置と折りたたまれた位置とに亘って腕部を変位自在とするのが好ましい。 Further, it is preferable that the arm portion be displaceable between a position where the sound emitting portion is developed and a position where the sound emitting portion is folded by rotation around the second axis.

また、放音部の音響放射側の逆側に、第２の軸芯と平行な第３の軸芯周りに腕部を回転させる第３の連結部を備えるのが好ましい。 Moreover, it is preferable to provide the 3rd connection part which rotates an arm part around the 3rd axial center parallel to a 2nd axial center on the opposite side to the acoustic radiation side of a sound emission part.

また、第１の軸芯周りに腕部が回転することによって、第３の軸芯および第３の連結部が第１の軸芯周りに回転するのが好ましい。 In addition, it is preferable that the third axis and the third connecting part rotate around the first axis by rotating the arm around the first axis.
また、第３の連結部は腕部に備えられているのが好ましい。 Moreover, it is preferable that the 3rd connection part is provided in the arm part.

また、腕部のヘッドバンド側の一端には第２の連結部が備えられ、腕部の放音部の音放射側の逆側の一端には第３の連結部が備えられているのが好ましい。 In addition, a second connecting portion is provided at one end of the arm portion on the headband side, and a third connecting portion is provided at one end on the opposite side of the sound emitting side of the sound emitting portion of the arm portion. preferable.

本発明の一実施例を、図１ないし図１２、図１５ないし図１９に基づいて説明する。図１に示すヘッドホン１は、人の頭に掛けられて、音を生じて、この音（音情報ともいう）を前述した人に伝達する。 One embodiment of the present invention will be described with reference to FIGS. 1 to 12 and FIGS. 15 to 19. A headphone 1 shown in FIG. 1 is put on a person's head, generates a sound, and transmits this sound (also referred to as sound information) to the person described above.

ヘッドホン１は、図１に示すように、イヤパッド１１と、ヘッドバンド２と、一対の腕部３と、一対の放音部４と、一対の第１の連結部５と、一対の第２の連結部６と、一対の第３の連結部７とを備えている。 As shown in FIG. 1, the headphone 1 includes an ear pad 11, a headband 2, a pair of arm portions 3, a pair of sound emission portions 4, a pair of first connection portions 5, and a pair of second connections. A connecting portion 6 and a pair of third connecting portions 7 are provided.

ヘッドバンド２は、図１に示すように、本体部８と、この本体部８の両端部それぞれに伸縮自在に取り付けられた一対の伸縮部９とを備えて、Ｃ字状に形成されている。ヘッドバンド２は、本体部８と伸縮部９とに亘って、平面形状がＣ字状となるように、人の頭の外形にそって緩やかに湾曲した帯板状に形成されている。ヘッドバンド２は、人の頭に掛けられる。 As shown in FIG. 1, the headband 2 includes a main body portion 8 and a pair of expansion / contraction portions 9 that are attached to both end portions of the main body portion 8 so as to be extendable and contracted, and is formed in a C shape. . The headband 2 is formed in a band plate shape that is gently curved along the outer shape of the human head so that the planar shape is C-shaped across the main body portion 8 and the stretchable portion 9. The headband 2 is hung on a person's head.

腕部３は、若干湾曲した帯板状に形成されている。腕部３は、図２に示すように、第１の連結部５と第２の連結部６とを介して、その一端部が、伸縮部９即ちヘッドバンド２の両端部に取り付けられている。 The arm 3 is formed in a slightly curved strip shape. As shown in FIG. 2, one end of the arm 3 is attached to the expansion / contraction part 9, that is, both ends of the headband 2, via the first connecting part 5 and the second connecting part 6. .

放音部４は、厚手の円板状に形成されている。放音部４は、硬質な合成樹脂で構成されかつ厚手の円盤状に形成されたスピーカケース１０と、このスピーカケース１０内に収容されたスピーカユニットと、イヤパッド１１とを備えている。ヘッドバンド２が人の頭に掛けられた際に、スピーカケース１０の人の耳に相対する側（以下、音響放射側という）には、スピーカユニットの生じた音が当該耳に伝達するための孔などが設けられている。スピーカユニットは、音声電流が供給されると、この音声電流に応じた音を生じる。イヤパッド１１は、発泡させたポリウレタン樹脂や不織布等の弾性変形自在な材料で構成され、かつ円環状に形成されて、スピーカケース１０の音響放射側と外縁部とに亘って貼り付けられている。放音部４は、第３の連結部７を介して腕部３の他端部に取り付けられている（支持されている）。イヤパッド１１が人の耳を覆うように接触することで、放音部４と人の耳との間に形成される空間を気密にすることができ、音響特性を良好にすることができる。また、外部から音が伝達されること、或いは外部へ音が漏れること等を抑止することができる。 The sound emitting part 4 is formed in a thick disc shape. The sound emitting unit 4 includes a speaker case 10 made of a hard synthetic resin and formed in a thick disk shape, a speaker unit housed in the speaker case 10, and an ear pad 11. When the headband 2 is put on a person's head, the sound produced by the speaker unit is transmitted to the ear of the speaker case 10 facing the person's ear (hereinafter referred to as an acoustic radiation side). A hole or the like is provided. When the audio current is supplied, the speaker unit generates a sound corresponding to the audio current. The ear pad 11 is made of an elastically deformable material such as foamed polyurethane resin or non-woven fabric, is formed in an annular shape, and is affixed across the acoustic radiation side and the outer edge of the speaker case 10. The sound emitting part 4 is attached (supported) to the other end of the arm part 3 via the third connecting part 7. By contacting the ear pad 11 so as to cover the human ear, the space formed between the sound emitting unit 4 and the human ear can be made airtight, and the acoustic characteristics can be improved. In addition, transmission of sound from the outside or leakage of sound to the outside can be suppressed.

第１の連結部５は、図３に示すように、第２の連結部６などを介して腕部３が取り付けられる第１接続用部材１２と、伸縮部９即ちヘッドバンド２に設けられた接続用穴１３と、一対の押さえ部材１４と、ワッシャ１５と、付勢手段としてのねじりコイルばね１６を備えている。 As shown in FIG. 3, the first connecting part 5 is provided on the first connecting member 12 to which the arm part 3 is attached via the second connecting part 6 and the like, and the expansion / contraction part 9, that is, the headband 2. A connecting hole 13, a pair of pressing members 14, a washer 15, and a torsion coil spring 16 as an urging means are provided.

第１接続用部材１２は、図４に示すように、円筒状に形成された本体部１７と、この本体部１７の伸縮部９即ちヘッドバンド２寄りの縁から外周方向に突出したフランジ部１８とを備えている。 As shown in FIG. 4, the first connecting member 12 includes a cylindrical body portion 17, and a flange portion 18 that protrudes in the outer circumferential direction from the expansion / contraction portion 9 of the body portion 17, that is, the edge near the headband 2. And.

接続用穴１３は、伸縮部９の先端面から凹に形成され、その平面形状が丸形に形成されており、第１接続用部材１２のフランジ部１８が、接続用穴１３内で回動可能となるような、相似となる形状にて形成されている。但し、フランジ部１８が接続用穴１３内で回動可能となれば良く、例えばフランジ部１８が円形状に形成され、接続用穴１３が楕円状、又は多角形状にて形成されていても構わなく、逆にフランジ部１８が楕円状、又は多角形状であって、接続用穴１３が円形状であっても良く、特に限定はしない。接続用穴１３の底面の中央には、図３に示すように、当該底面から凸のねじりコイルばね１６を位置決めするための突起１９が設けられている。また、図１５に示すように、接続用穴１３の底面の外縁部には、当該底面に対し凹状の凹部６が周状に設けられている。 The connection hole 13 is formed in a concave shape from the distal end surface of the expansion / contraction part 9, and the planar shape thereof is formed in a round shape, and the flange portion 18 of the first connection member 12 rotates in the connection hole 13. It is formed in a similar shape that is possible. However, it is only necessary that the flange portion 18 is rotatable in the connection hole 13. For example, the flange portion 18 may be formed in a circular shape, and the connection hole 13 may be formed in an elliptical shape or a polygonal shape. On the contrary, the flange portion 18 may be elliptical or polygonal, and the connection hole 13 may be circular, and there is no particular limitation. As shown in FIG. 3, a projection 19 for positioning the convex torsion coil spring 16 from the bottom surface is provided at the center of the bottom surface of the connection hole 13. Further, as shown in FIG. 15, the outer edge portion of the bottom surface of the connection hole 13 is provided with a concave portion 6 that is concave with respect to the bottom surface.

また、第１接続用部材１２のフランジ部１８には、接続用穴１３の凹部６０に挿入される凸状の突起２０が設けられており、接続用穴１３の凹部６０と嵌合することで、第１接続用部材の回転が規制されている。接続用穴１３の凹部６０は、円弧状となるように形成されているが、その形状は特に限定されることなく、第１接続用部材の回転を規制する形状であれば構わなく、楕円状等に形成しても構わない。また、接続用穴１３に突起が形成され、第１接続用部材に凹部６０が形成されても構わなく、適宜変更することができる。 Further, the flange portion 18 of the first connection member 12 is provided with a convex protrusion 20 to be inserted into the recess 60 of the connection hole 13, and is fitted with the recess 60 of the connection hole 13. The rotation of the first connecting member is restricted. The concave portion 60 of the connection hole 13 is formed to have an arc shape. However, the shape is not particularly limited, and may be any shape that restricts the rotation of the first connection member. It may be formed in a similar manner. In addition, a protrusion may be formed in the connection hole 13 and a recess 60 may be formed in the first connection member, which can be changed as appropriate.

また、接続用穴１３は、図１１及び図１２に示すように、内側に第１接続用部材１２の本体部１７のヘッドバンド２寄りの端部とフランジ部１８とを収容する。 Further, as shown in FIGS. 11 and 12, the connection hole 13 accommodates the end portion of the main body portion 17 of the first connection member 12 near the headband 2 and the flange portion 18 inside.

一対の押さえ部材１４は、平面形状がＣ字状の平板状に形成されている。一対の押さえ部材１４は、伸縮部９に取り付けられる。一対の押さえ部材１４は、伸縮部９に取り付けられると、図１１及び図１２に示すように、互いの間に第１接続用部材１２を位置つけるとともに、接続用穴１３の底面との間にフランジ部１８を位置付ける。フランジ部１８が接続用穴１３の底面と押さえ部材との間に位置付けられると、第１接続用部材１２は、ヘッドバンド２に対して後述する第１の軸芯Ｐ１周りに回転自在となる。 The pair of pressing members 14 are formed in a flat plate shape having a C-shaped planar shape. The pair of pressing members 14 are attached to the stretchable part 9. When the pair of pressing members 14 are attached to the telescopic portion 9, as shown in FIGS. 11 and 12, the first connecting member 12 is positioned between them and between the bottom surface of the connecting hole 13. The flange portion 18 is positioned. When the flange portion 18 is positioned between the bottom surface of the connection hole 13 and the pressing member, the first connection member 12 is rotatable around a first axis P1 described later with respect to the headband 2.

ワッシャ１５は、円環状に形成されている。ワッシャ１５は、接続用穴１３内に収容されて、本体部１７のヘッドバンド２寄りの位置に配置される。ワッシャ１５は、ねじりコイルばね１６を位置決めするための突起１９に、ねじりコイルばね１６とともに挿入され、ねじ等で締結され固定される。 The washer 15 is formed in an annular shape. The washer 15 is accommodated in the connection hole 13 and is disposed at a position near the headband 2 of the main body portion 17. The washer 15 is inserted into the projection 19 for positioning the torsion coil spring 16 together with the torsion coil spring 16, and is fastened and fixed with a screw or the like.

第１接続用部材１３のフランジ部１８には、図９及び図１０に示すように、回転規制用の突起２０と、組み付け用溝２１とが設けられている。回転規制用の突起２０は、第１接続用部材１３のフランジ部１８の伸縮部９寄りの表面から凸に設けられている。回転規制用の突起２０は、第１接続用部材１２即ち腕部３が伸縮部９即ちヘッドバンド２に取り付けられて、後述する第１の軸芯Ｐ１周りに回転される際に、接続用穴１３の底面に設けられた凹部６０に接触して、第１接続用部材１２即ち腕部３が回転できる範囲を規制する。組み付け用溝２１は、第１接続用部材１３のフランジ部１８の伸縮部９寄りの表面から凹に形成されている。組み付け用溝２１は、ねじりコイルばね１６の後述する一方の棒状部２３を収容して、当該棒状部２３を固定する。 As shown in FIGS. 9 and 10, the flange portion 18 of the first connecting member 13 is provided with a rotation restricting protrusion 20 and an assembly groove 21. The rotation restricting projection 20 is provided so as to protrude from the surface of the flange portion 18 of the first connecting member 13 near the expandable portion 9. The rotation restricting protrusion 20 is formed when the first connecting member 12, that is, the arm portion 3 is attached to the expansion / contraction portion 9, that is, the headband 2, and is rotated around a first axis P 1 described later. 13, the first connection member 12, that is, the range in which the arm portion 3 can rotate is regulated by contacting the concave portion 60 provided on the bottom surface of 13. The assembling groove 21 is formed in a concave shape from the surface of the flange portion 18 of the first connecting member 13 near the expandable portion 9. The assembling groove 21 accommodates one rod-shaped portion 23 of the torsion coil spring 16 to be described later, and fixes the rod-shaped portion 23.

前述した構成の第１の連結部５は、第１接続用部材１２が伸縮部９即ちヘッドバンド２に取り付けられると、ヘッドバンド２から腕部３に向かう方向と平行な第１の軸芯Ｐ１（図１などに一点鎖線で示す）周りに、ヘッドバンド２に対して第１接続用部材１２が回転自在となる。即ち、第１接続用部材１２が、第２の連結部６を介して腕部３に取り付けられるので、ヘッドバンド２と腕部３とを、第１の軸芯Ｐ１周りに回転自在に連結する。なお、第１の軸芯Ｐ１は、第１接続用部材１２と同軸となっている（第１接続用部材１２の軸芯となっている）。 When the first connecting member 12 is attached to the expansion / contraction part 9, that is, the headband 2, the first connecting part 5 having the above-described configuration has the first axis P 1 parallel to the direction from the headband 2 toward the arm part 3. Around the headband 2 (shown by a one-dot chain line in FIG. 1 and the like), the first connecting member 12 is rotatable. That is, since the first connecting member 12 is attached to the arm portion 3 via the second connecting portion 6, the headband 2 and the arm portion 3 are rotatably connected around the first axis P1. . The first axis P1 is coaxial with the first connection member 12 (the axis of the first connection member 12).

ねじりコイルばね１６は、鉄、リン青銅などの金属からなる線材で構成され、図９及び図１０に示すように、この線材が巻回されて円環状に形成された弾性変形部２２と、棒状に形成されかつ弾性変形部２２から当該弾性変形部２２の外周方向に延在した一対の棒状部２３とを備えている。ねじりコイルばね１６は、第１接続用部材１２内に収容され、内側に接続用穴１３の前述した突起１９が通されて位置決めされる。ねじりコイルばね１６は、一方の棒状部２３が組み付け用溝２１内に収容されて、ワッシャ１５と共に伸縮部９にねじ等を用いて取り付けられる（固定される）。また、ねじりコイルばね１６は、他方の棒状部２３が接続用穴１３の内面即ちヘッドバンド２に取り付けられる（固定される）。 The torsion coil spring 16 is made of a wire made of a metal such as iron or phosphor bronze, and as shown in FIGS. 9 and 10, an elastically deformable portion 22 formed into an annular shape by winding this wire, and a rod-like shape And a pair of rod-shaped portions 23 extending from the elastic deformation portion 22 in the outer peripheral direction of the elastic deformation portion 22. The torsion coil spring 16 is accommodated in the first connecting member 12, and the above-described protrusion 19 of the connecting hole 13 is passed through the inside to be positioned. The torsion coil spring 16 has one rod-like portion 23 accommodated in the assembly groove 21 and is attached (fixed) to the expansion / contraction portion 9 together with the washer 15 using a screw or the like. Further, the other rod-like portion 23 of the torsion coil spring 16 is attached (fixed) to the inner surface of the connection hole 13, that is, the headband 2.

詳細には、図１５、図１６に示されるように、他方の棒状部２３が接続用穴１３の底面部から突出する形状を有する壁部６１の側面に沿うように延在し、壁部６１に固着されている。壁部６１は、一方の棒状部２３の周方向における移動を阻害しないよう、凹部６０に対し、ねじりコイルばね１６を挟んで、対向する側に形成されている。なお、壁部６１は、凹部６０の延在する方向に対し交差する方向に形成されているが、これに限定されず、凹部６０の延在する方向に沿うように形成されても構わなく、所望の弾性復元力を得るべく、適宜変更しても構わない。 Specifically, as shown in FIG. 15 and FIG. 16, the other rod-shaped portion 23 extends along the side surface of the wall portion 61 having a shape protruding from the bottom surface portion of the connection hole 13, and the wall portion 61. It is fixed to. The wall portion 61 is formed on the opposite side of the concave portion 60 with the torsion coil spring 16 interposed therebetween so as not to hinder the movement of the one rod-shaped portion 23 in the circumferential direction. The wall 61 is formed in a direction that intersects the direction in which the recess 60 extends, but is not limited thereto, and may be formed along the direction in which the recess 60 extends. You may change suitably in order to obtain a desired elastic restoring force.

ねじりコイルばね１６は、一方の棒状部２３が第１接続用部材１２（腕部３）に取り付けられ、他方の棒状部２３が接続用穴１３（ヘッドバンド２）に取り付けられているので、第１の連結部５即ち腕部３が第１の軸芯Ｐ１周りに回転されると、図１０に示すように、弾性変形部２２が拡縮（拡大、縮小すること）するように弾性変形して（図１０には拡大する場合を示している）、勿論、弾性変形していない中立状態に復帰するための弾性復元力を生じる。図９では、一方の棒状部２３と他方の棒状部２３とが略垂直となるように、弾性変形部２２から引き出されているが、これに限定されず、例えば１２０度など、所定の角度となるように複数の棒状部２３を引き出しても構わなく、所定の弾性復元力を得られるよう、適宜変更可能である。また、ねじりコイルばね１６の代わりに、一本の弾性部材（例えばゴム等の天然樹脂、スパンボンド等のポリウレタン樹脂などの樹脂材料）を接続用穴１３の突起１９の周囲に巻装させて、弾性復元力を得る構成にしても構わなく、適宜変更可能である。図９に示すねじりコイルばね１６が弾性変形していない中立状態において、伸縮部９即ちヘッドバンド２の表面と腕部３の表面とが互いに略平行となる中立位置（図１に示す）に、前述したヘッドバンドと腕部３とが位置付けられる。こうして、ねじりコイルばね１６は、腕部３が第１の軸芯Ｐ１周りに回転された際に、腕部３とヘッドバンド２とが互いに平行となる中立位置に向かって、前記腕部３を付勢することとなる。なお、本明細書では、腕部３とヘッドバンド２との間に生じる段差が最少となる位置を中立位置といい、本明細書における中立位置とは、ヘッドバンド２の表面と腕部３の表面とが完全に互いに平行であることを示してはいない。言い換えれば、腕部３の表面が延在する方向（放音部４からヘッドバンド２に向かう向き）とヘッドバンド２の表面が延在する方向（腕部３からヘッドバンド２の中央部に向かう向き）とが成す角度が最小となる位置を中立位置といい、本明細書における中立位置とは、ヘッドバンド２の表面と腕部３の表面とが完全に０度であることを示してはいない。 The torsion coil spring 16 has one rod-like portion 23 attached to the first connecting member 12 (arm portion 3) and the other rod-like portion 23 attached to the connecting hole 13 (headband 2). When the one connecting portion 5, that is, the arm portion 3 is rotated around the first axis P 1, as shown in FIG. 10, the elastic deformation portion 22 is elastically deformed so as to expand and contract (enlarge and contract). (FIG. 10 shows a case of enlargement) Of course, an elastic restoring force is generated for returning to a neutral state that is not elastically deformed. In FIG. 9, one rod-like portion 23 and the other rod-like portion 23 are drawn from the elastic deformation portion 22 so as to be substantially vertical. However, the present invention is not limited to this, and for example, a predetermined angle such as 120 degrees and the like The plurality of rod-like portions 23 may be pulled out as described above, and can be appropriately changed so as to obtain a predetermined elastic restoring force. Further, instead of the torsion coil spring 16, a single elastic member (for example, a natural resin such as rubber or a resin material such as polyurethane resin such as spunbond) is wound around the projection 19 of the connection hole 13, The elastic restoring force may be obtained and can be changed as appropriate. In the neutral state in which the torsion coil spring 16 shown in FIG. 9 is not elastically deformed, in the neutral position (shown in FIG. 1) where the surface of the telescopic part 9, that is, the headband 2 and the surface of the arm part 3 are substantially parallel to each other. The above-described headband and arm portion 3 are positioned. Thus, the torsion coil spring 16 moves the arm 3 toward the neutral position where the arm 3 and the headband 2 are parallel to each other when the arm 3 is rotated about the first axis P1. It will be energized. In the present specification, the position where the level difference between the arm 3 and the headband 2 is minimized is referred to as a neutral position. In the present specification, the neutral position refers to the surface of the headband 2 and the arm 3. It does not show that the surfaces are completely parallel to each other. In other words, the direction in which the surface of the arm portion 3 extends (direction from the sound emitting portion 4 toward the headband 2) and the direction in which the surface of the headband 2 extends (from the arm portion 3 toward the center portion of the headband 2). The position where the angle between the headband 2 and the surface of the arm portion 3 is completely 0 degrees is referred to as a neutral position. Not in.

第２の連結部６は、図４に示すように、第２接続用部材２４と、腕部３に設けられた切欠き２５と、腕部３に設けられた通し孔２６と、シャフト２７とを備えている。 As shown in FIG. 4, the second connecting portion 6 includes a second connecting member 24, a notch 25 provided in the arm portion 3, a through hole 26 provided in the arm portion 3, a shaft 27, and the like. It has.

第２接続用部材２４は、円筒状に形成されている。第２接続用部材２４は、その軸芯が第１接続用部材１２の軸芯と交差（図示例では直交）した状態で、当該第１接続用部材１２の端部に連なって、当該第１接続用部材１２と一体に形成されている。即ち、第２接続用部材２４は、第１接続用部材１２と一体に設けられて、接続用部材２８をなしている。このように、ヘッドホン１は、接続用部材２８を備えている。 The second connecting member 24 is formed in a cylindrical shape. The second connecting member 24 is connected to the end of the first connecting member 12 in a state where the axis of the second connecting member 24 intersects the axis of the first connecting member 12 (orthogonal in the illustrated example). It is formed integrally with the connecting member 12. That is, the second connecting member 24 is provided integrally with the first connecting member 12 to form the connecting member 28. As described above, the headphone 1 includes the connection member 28.

切欠き２５は、腕部３の一端部に設けられ、当該一端部の端から腕部３の中央部に向かって、腕部３の一部が切りかかれた格好に形成されている。切欠き２５は、内側に第２接続用部材２４を配置する。通し孔２６は、腕部３の一端部に設けられている。通し孔２６は、その断面形が丸形の孔であり、切欠き２５内に配置された第２接続用部材２４と同軸となる（連通する）位置に設けられている。 The notch 25 is provided at one end of the arm 3, and is formed in a shape in which a part of the arm 3 is cut from the end of the one end toward the center of the arm 3. The notch 25 has the second connecting member 24 disposed inside. The through hole 26 is provided at one end of the arm 3. The through hole 26 is a hole having a round cross-sectional shape, and is provided at a position that is coaxial (communication) with the second connecting member 24 disposed in the notch 25.

シャフト２７は、外径が段階的に変化する円柱状に形成されている。シャフト２７は、通し孔２６と第２接続用部材２４内に通される。シャフト２７は、固定用ボルト２９（図４に示す）により腕部３に固定される。第２接続用部材２４内に通されたシャフト２７が固定用ボルト２９により腕部３に固定されることより、当該第２接続用部材２４は、腕部３に取り付けられる。また、内側にシャフト２７が通されるので、第２接続用部材２４は、勿論、当該シャフト２７を収容する。さらに、第２接続用部材２４内に通されたシャフト２７が固定用ボルト２９により腕部３に固定されると、第２接続用部材２４は、ヘッドバンド２の幅方向と略平行でかつ第１の軸芯Ｐ１に対して直交した第２の軸芯Ｐ２周りに、腕部３に対して回転自在となる。 The shaft 27 is formed in a cylindrical shape whose outer diameter changes stepwise. The shaft 27 is passed through the through hole 26 and the second connecting member 24. The shaft 27 is fixed to the arm 3 by a fixing bolt 29 (shown in FIG. 4). The second connecting member 24 is attached to the arm portion 3 by fixing the shaft 27 passed through the second connecting member 24 to the arm portion 3 by the fixing bolt 29. Further, since the shaft 27 is passed inside, the second connecting member 24 naturally accommodates the shaft 27. Further, when the shaft 27 passed through the second connecting member 24 is fixed to the arm portion 3 by the fixing bolt 29, the second connecting member 24 is substantially parallel to the width direction of the headband 2 and is The arm portion 3 is rotatable around a second axis P2 orthogonal to the first axis P1.

前述した構成の第２の連結部６は、第１の連結部５と腕部３とを、第２の軸芯Ｐ２（図１などに一点鎖線で示す）周りに回転自在に連結する。なお、第２の軸芯Ｐ２は、第２接続用部材２４と同軸となっている（第２接続用部材２４の軸芯となっている）。このように、第２の連結部６は、第１の連結部５即ちヘッドバンド２に対して、腕部３を第２の軸芯Ｐ２周りに回転して、図１１に示す放音部４が展開された位置と、図１２に示す放音部４が折りたたまれた位置とに亘って、腕部３即ち放音部４を変位自在とする。 The second connecting portion 6 having the above-described configuration connects the first connecting portion 5 and the arm portion 3 so as to be rotatable around a second axis P2 (shown by a one-dot chain line in FIG. 1 and the like). The second axis P2 is coaxial with the second connection member 24 (the axis of the second connection member 24). As described above, the second connecting portion 6 rotates the arm portion 3 around the second axis P2 with respect to the first connecting portion 5, that is, the headband 2, so that the sound emitting portion 4 shown in FIG. The arm 3, that is, the sound emission part 4, is displaceable over the position where the sound emission part 4 is folded and the position where the sound emission part 4 shown in FIG. 12 is folded.

また、ヘッドホン１は、図５に示すように、第２維持手段としての維持機構３０を備えている。維持機構３０は、図５に示すように、複数の凹溝３１と、複数の被嵌合部としての丸形凹み３２と、複数の収容孔３３（図１１及び図１２に示す）と、複数の嵌合部材としての突起プレート３４と、複数の第１付勢部材としてのコイルばね３５とを備えている。 In addition, the headphone 1 includes a maintenance mechanism 30 as a second maintenance means, as shown in FIG. As shown in FIG. 5, the maintenance mechanism 30 includes a plurality of concave grooves 31, a plurality of round dents 32 as a plurality of fitted portions, a plurality of receiving holes 33 (shown in FIGS. 11 and 12), a plurality of A projection plate 34 as a fitting member, and a plurality of coil springs 35 as first biasing members.

凹溝３１は、図示例では、二つ設けられている。凹溝３１は、それぞれ、第２接続用部材２４の外周面から凹でかつ当該第２接続用部材２４の周方向に沿って延在している。二つの凹溝３１は、第２接続用部材２４の軸芯即ち第２の軸芯Ｐ２に沿って、互いに間隔をあけて配置されている。凹溝３１は二つに限定されず、三つ、四つなど複数形成されていても構わなく、凹溝３１の数に対応するように、被嵌合部としての丸形凹み３２を複数形成しても構わない。 In the illustrated example, two concave grooves 31 are provided. The concave grooves 31 are concave from the outer peripheral surface of the second connecting member 24 and extend along the circumferential direction of the second connecting member 24. The two concave grooves 31 are arranged at intervals from each other along the axis of the second connecting member 24, that is, the second axis P 2. The number of the concave grooves 31 is not limited to two, and a plurality of the concave grooves 31 may be formed, such as three or four, and a plurality of round dents 32 are formed as the fitted portions so as to correspond to the number of the concave grooves 31. It doesn't matter.

丸形凹み３２は、各凹溝３１上に複数設けられている。丸形凹み３２は、図示例では、各凹溝３１に二つ即ち合計四つ設けられている。丸形凹み３２は、凹溝３１の長手方向即ち第２接続用部材２４の周方向に沿って、互いに間隔をあけて設けられている。丸形凹み３２は、第２接続用部材２４の外周面と凹溝３１の底面から凹に形成されている。丸形凹み３２は、その平面形状が丸形に形成されている。。丸形凹み３２の代わりに、楕円状、多角形状の形状を有する凹みを第２接続用部材２４の外周面に形成しても構わなく、適宜変更可能である。 A plurality of round recesses 32 are provided on each recess 31. In the illustrated example, two round recesses 32 are provided in each recess groove 31, that is, a total of four. The round recesses 32 are provided at intervals from each other along the longitudinal direction of the recessed groove 31, that is, the circumferential direction of the second connecting member 24. The round recess 32 is formed as a recess from the outer peripheral surface of the second connecting member 24 and the bottom surface of the groove 31. The round shape of the round recess 32 is round. . Instead of the round recess 32, a recess having an elliptical or polygonal shape may be formed on the outer peripheral surface of the second connecting member 24, and can be changed as appropriate.

収容孔３３は、図示例では、二つ設けられている。収容孔３３は、腕部３の前述した端部に設けられかつその開口部が第２接続用部材２４に設けられた凹溝３１に相対している。 In the illustrated example, two accommodation holes 33 are provided. The accommodation hole 33 is provided at the above-described end portion of the arm portion 3, and its opening portion is opposed to the concave groove 31 provided in the second connecting member 24.

突起プレート３４は、図示例では、二つ設けられている。突起プレート３４は、半球状の球状部３６と、この球状部３６の平坦な底面に連なった円柱状の柱状部３７とを一体に備えている。球状部３６と柱状部３７とは、互いに同軸に配置されている。球状部３６は、丸形凹み３２の底面に密に接触して、当該丸形凹み３２に嵌合する。また、柱状部３７は、球状部３６よりも小径に形成されている。突起プレート３４は、球状部３６が第２接続用部材２４に相対した格好で収容孔３３内に遊挿されている。突起プレート３４は、収容孔３３内に遊挿されることで、腕部３から第２接続用部材２４に向かって凸没自在に設けられている。また、突起プレート３４は、球状部３６が丸形凹み３２に嵌合するので、勿論、丸形凹み３２に嵌合可能となっている。球状部３６が丸形凹み３２に対応する形状に形成されていれば構わなく、丸形凹み３２の代わりに楕円状、多角形状の凹みが形成されている場合には、球状部３６を楕円状部、又は多角形状部にしても構わなく、適宜変更可能である。 In the illustrated example, two protrusion plates 34 are provided. The protrusion plate 34 is integrally provided with a hemispherical spherical portion 36 and a columnar columnar portion 37 that is continuous with the flat bottom surface of the spherical portion 36. The spherical portion 36 and the columnar portion 37 are arranged coaxially with each other. The spherical portion 36 comes into close contact with the bottom surface of the round recess 32 and fits into the round recess 32. Further, the columnar part 37 is formed with a smaller diameter than the spherical part 36. The protruding plate 34 is loosely inserted into the accommodation hole 33 with the spherical portion 36 facing the second connecting member 24. The protruding plate 34 is provided so as to be able to project and retract from the arm portion 3 toward the second connecting member 24 by being loosely inserted into the accommodation hole 33. Further, since the spherical portion 36 is fitted into the round recess 32, the protruding plate 34 can be fitted into the round recess 32. It suffices if the spherical portion 36 is formed in a shape corresponding to the round recess 32. When the oval or polygonal recess is formed in place of the round recess 32, the spherical portion 36 is formed in an elliptical shape. It may be a part or a polygonal part, and can be changed as appropriate.

コイルばね３５は、図示例では、二つ設けられている。コイルばね３５は、収容孔３３内に収容されて、収容孔３３の底面と突起プレート３４との間に設けられている。コイルばね３５は、収容孔３３の底面と突起プレート３４との間に設けられることで、突起プレート３４を第２接続用部材２４に向かって付勢する。コイルばね３５の代わりに、弾性部材としてゴムから構成される部材や、ポリウレタン樹脂から構成される部材を配置しても構わなく、突起プレート３４を第２接続用部材２４に向かって付勢できれば良く、付勢する力を適宜調整する等の目的にて、コイルばね３５の代わりに公知の弾性部材を適宜選択して使用も構わない。 In the illustrated example, two coil springs 35 are provided. The coil spring 35 is housed in the housing hole 33 and is provided between the bottom surface of the housing hole 33 and the protruding plate 34. The coil spring 35 is provided between the bottom surface of the accommodation hole 33 and the projection plate 34 to urge the projection plate 34 toward the second connecting member 24. Instead of the coil spring 35, a member made of rubber or a member made of polyurethane resin may be arranged as the elastic member, and it is sufficient if the protruding plate 34 can be biased toward the second connecting member 24. Instead of the coil spring 35, a known elastic member may be appropriately selected and used for the purpose of appropriately adjusting the urging force.

前述した構成の維持機構３０は、コイルばね３５が突起プレート３４を第２接続用部材２４に向かって付勢し、突起プレート３４が凹溝３１に相対した収容孔３３内に収容されていることで、突起プレート３４の球状部３６が凹溝３１に密着する。そして、維持機構３０は、突起プレート３４の球状部３６が丸形凹み３２に進入して、この丸形凹み３２に嵌合することで、第２の軸芯Ｐ２周りの第１の連結部５と腕部３との相対的な位置を維持する。 In the maintenance mechanism 30 having the above-described configuration, the coil spring 35 biases the projection plate 34 toward the second connecting member 24, and the projection plate 34 is accommodated in the accommodation hole 33 facing the concave groove 31. Thus, the spherical portion 36 of the projection plate 34 is in close contact with the concave groove 31. Then, the maintaining mechanism 30 is configured such that the spherical portion 36 of the projection plate 34 enters the round recess 32 and is fitted into the round recess 32, whereby the first connecting portion 5 around the second axis P2. And the relative position of the arm 3 are maintained.

第３の連結部７は、図６、図８、図１７〜図１９に示すように、放音部４に取り付けられるケースホルダ３８と、切欠き３９と、腕部３に一体に設けられた収容部４０と、固定用接続シャフト４１と、被収容部材としてのスライド用接続シャフト４２とを備えている。 As shown in FIGS. 6, 8, and 17 to 19, the third connecting portion 7 is provided integrally with the case holder 38 attached to the sound emitting portion 4, the notch 39, and the arm portion 3. The housing part 40, the connection shaft 41 for fixation, and the connection shaft 42 for a slide as a to-be-accepted member are provided.

ケースホルダ３８は、放音部４の音響放射側の裏側（逆側）の中央部に取り付けられる平板状のホルダ本体４３と、このホルダ本体４３上に設けられた筒状部４４と、を一体に備えている。ホルダ本体４３は、放音部４の前述した裏側の中央部に固定される。筒状部４４は、円筒状に形成され、かつその軸芯がホルダ本体４３の表面と略平行に配置されている。 The case holder 38 is formed by integrating a flat holder main body 43 attached to the central portion on the back side (reverse side) of the sound emitting part 4 on the acoustic radiation side and a cylindrical part 44 provided on the holder main body 43. In preparation. The holder main body 43 is fixed to the central portion on the back side of the sound emitting unit 4 described above. The cylindrical portion 44 is formed in a cylindrical shape, and its axis is disposed substantially parallel to the surface of the holder main body 43.

切欠き３９は、腕部３の他端部に設けられ、当該他端部の端から腕部３の中央部に向かって、腕部３の一部が切りかかれた格好に形成されている。切欠き３９は、内側にケースホルダ３８の筒状部４４を配置する。 The notch 39 is provided at the other end portion of the arm portion 3, and is formed so that a part of the arm portion 3 is cut from the end of the other end portion toward the central portion of the arm portion 3. The notch 39 has the cylindrical portion 44 of the case holder 38 disposed inside.

収容部４０は、有底筒状に形成され、かつ腕部３の他端部に一対設けられている。収容部４０は、切欠き３９に開口している。収容部４０は、切欠き３９内に配置されたケースホルダ３８の筒状部４４と同軸となる（連通する）位置に設けられている。 The accommodating part 40 is formed in a bottomed cylindrical shape and is provided in a pair at the other end of the arm part 3. The accommodating portion 40 opens in the notch 39. The accommodating portion 40 is provided at a position that is coaxial (communicate) with the cylindrical portion 44 of the case holder 38 disposed in the notch 39.

固定用接続シャフト４１は、平板状の固定部４５と、この固定部４５から立設した立設部４６と、この立設部４６に一端が連なった円柱状の円筒部４７とを一体に備えている。固定部４５は、放音部４の前述した裏側に重ねられて、当該放音部４に固定される。円筒部４７は、ケースホルダ３８内に収容されるとともに、その先端部が収容部４０内に侵入する。円筒部４７は、収容部４０内に侵入して、当該収容部４０に対して回転自在となる。 The fixing connecting shaft 41 is integrally provided with a flat plate-like fixing portion 45, a standing portion 46 erected from the fixing portion 45, and a columnar cylindrical portion 47 having one end connected to the standing portion 46. ing. The fixing portion 45 is superimposed on the above-described back side of the sound emitting portion 4 and is fixed to the sound emitting portion 4. The cylindrical portion 47 is accommodated in the case holder 38, and a tip portion thereof enters the accommodating portion 40. The cylindrical portion 47 enters the housing portion 40 and is rotatable with respect to the housing portion 40.

スライド用接続シャフト４２は、円柱状に形成されている。スライド用接続シャフト４２は、ケースホルダ３８の筒状部４４内に収容されるとともに、その先端部が収容部４０内に侵入する。スライド用接続シャフト４２は、ケースホルダ３８の筒状部４４内に収容されることで、当該ケースホルダ３８を介して放音部４に設けられている。スライド用接続シャフト４２は、先端部が収容部４０内に侵入することで、当該収容部４０内に第３の軸芯Ｐ３周りにこの収容部４０に対して相対的に回転自在に収容される。スライド用接続シャフト４２は、収容部４０内に侵入して、当該収容部４０に対して回転自在となる。さらに、スライド用接続シャフト４２は、その軸芯に沿って、移動自在に設けられている。 The slide connection shaft 42 is formed in a cylindrical shape. The slide connection shaft 42 is accommodated in the cylindrical portion 44 of the case holder 38, and a tip portion thereof enters the accommodation portion 40. The slide connection shaft 42 is accommodated in the cylindrical portion 44 of the case holder 38, so that the slide connection shaft 42 is provided in the sound emitting portion 4 via the case holder 38. The slide connection shaft 42 is housed in the housing portion 40 so as to be rotatable relative to the housing portion 40 around the third axis P 3 when the distal end portion enters the housing portion 40. . The slide connection shaft 42 enters the housing portion 40 and is rotatable with respect to the housing portion 40. Furthermore, the slide connection shaft 42 is provided so as to be movable along its axis.

前述した構成の第３の連結部７は、固定用接続シャフト４１の円筒部４７とスライド用接続シャフト４２が、収容部４０に対して回転自在であることで、腕部３を、当該腕部３の幅方向に沿う第３の軸芯Ｐ３（図１中に一点鎖線で示す）周りに回転自在に放音部４に連結している。なお、第３の軸芯Ｐ３は、第１の連結部５の第１接続用部材１２が中立位置に位置付けられた状態で、前記第２の軸芯Ｐ２と平行となっている。 In the third connecting portion 7 having the above-described configuration, the cylindrical portion 47 of the fixing connection shaft 41 and the sliding connection shaft 42 are rotatable with respect to the housing portion 40, so that the arm portion 3 is connected to the arm portion. 3 is connected to the sound emitting part 4 so as to be rotatable around a third axis P3 (indicated by a one-dot chain line in FIG. 1) along the width direction 3. The third axis P3 is parallel to the second axis P2 in a state where the first connecting member 12 of the first connecting portion 5 is positioned at the neutral position.

第３の連結部７を構成する、ケースホルダ３８は、スピーカケース１０の中央部付近に形成される開口部５５を筒状部４４が通って、腕部３に向かって突出するように、配置される。ケースホルダ３８に形成される貫通孔部６２に締結部材（ねじ）が挿入され、スピーカケース１０に形成され、内面にねじ切りが形成された凹部６３に挿入されることによって、ケースホルダ３８がスピーカケース１０に固定される。ケースホルダ３８に収容されるスライド用接続シャフト４２と、コイルばね５１を、ケースホルダ３８内で支持すべく、ばね支持部材５４の突起部５７がケースホルダ３８内に挿入される。スピーカケース１０に形成され、内面がねじ切りされる凹部５８には、ばね支持部材５４に形成される貫通孔部５９を通過する締結部材（ねじ）等が挿入されて、ばね支持部材がスピーカケース１０に固定される。 The case holder 38 constituting the third connecting portion 7 is arranged so that the cylindrical portion 44 passes through the opening 55 formed near the center portion of the speaker case 10 and protrudes toward the arm portion 3. Is done. A fastening member (screw) is inserted into a through-hole portion 62 formed in the case holder 38, and is inserted into a recess 63 formed in the speaker case 10 and threaded on the inner surface. 10 is fixed. The protrusion 57 of the spring support member 54 is inserted into the case holder 38 in order to support the slide connection shaft 42 accommodated in the case holder 38 and the coil spring 51 in the case holder 38. A fastening member (screw) or the like that passes through a through-hole portion 59 formed in the spring support member 54 is inserted into the recess 58 formed in the speaker case 10 and whose inner surface is threaded, and the spring support member serves as the speaker case 10. Fixed to.

また、ヘッドホン１は、第３維持手段としての第２維持機構４８を備えている。第２維持機構４８は、図７に示すように、収容部４０とスライド用接続シャフト４２とが係合するように形成される収容部４０の内面としての奥面５２と、スライド用接続シャフト４２の端面５３と、凸部としての直線凸部４９と、凹部としての直線凹部５０と、第２付勢部材としてのコイルばね５１（図８に示す）とを備えている。 In addition, the headphone 1 includes a second maintenance mechanism 48 as third maintenance means. As shown in FIG. 7, the second maintenance mechanism 48 includes a back surface 52 as an inner surface of the housing portion 40 formed so that the housing portion 40 and the slide connection shaft 42 are engaged, and a slide connection shaft 42. End surface 53, a linear convex portion 49 as a convex portion, a linear concave portion 50 as a concave portion, and a coil spring 51 (shown in FIG. 8) as a second urging member.

直線凸部４９は、各第３の連結部７のスライド用接続シャフト４２が侵入する収容部４０の内面のうち当該収容部４０の最も奥に位置する奥面５２から凸に設けられている。なお、奥面５２は、スライド用接続シャフト４２の後述する端面５３と相対する。直線凸部４９は、奥面５２の中心を通りかつ直線状に延在している。 The straight convex portion 49 is provided so as to protrude from the innermost surface of the accommodating portion 40 into which the sliding connection shaft 42 of each third connecting portion 7 enters, from the innermost surface 52 located at the innermost portion of the accommodating portion 40. The back surface 52 is opposed to an end surface 53 (described later) of the slide connection shaft 42. The straight convex portion 49 passes through the center of the back surface 52 and extends linearly.

直線凹部５０は、各第３の連結部７のスライド用接続シャフト４２の収容部４０の最も奥側に位置する端面５３から凹に設けられている。直線凹部５０は、端面５３の中心を通りかつ直線状に延在している。直線凹部５０には、直線凸部４９が侵入可能である。直線凹部５０内に直線凸部４９が侵入すると、前記直線凸部４９の外表面と直線凹部５０の内面とが密に接触し、かつ端面５３と奥面５２とが互いに密に接触する。前記直線凸部４９の外表面と直線凹部５０の内面とが密に接触し、かつ端面５３と奥面５２とが互いに密に接触することで、直線凸部４９と直線凹部５０とが互いに係合する。 The linear recess 50 is provided in a recess from the end surface 53 located on the innermost side of the accommodating portion 40 of the slide connection shaft 42 of each third connecting portion 7. The linear recess 50 extends linearly through the center of the end surface 53. The linear convex portion 49 can enter the linear concave portion 50. When the linear convex portion 49 enters the linear concave portion 50, the outer surface of the linear convex portion 49 and the inner surface of the linear concave portion 50 come into close contact with each other, and the end surface 53 and the back surface 52 come into close contact with each other. The outer surface of the linear convex portion 49 and the inner surface of the linear concave portion 50 are in intimate contact, and the end surface 53 and the inner surface 52 are in intimate contact with each other, whereby the linear convex portion 49 and the linear concave portion 50 are engaged with each other. Match.

コイルばね５１は、各第３の連結部７のスライド用接続シャフト４２と固定用接続シャフト４１との間に設けられて、スライド用接続シャフト４２を収容部４０の奥に向かって、即ち、端面５３を奥面５２に向かって付勢している。また、コイルばね５１は、放音部４に取り付けられるばね支持部材５４（図８に示す）により前記シャフト４１，４２間に配置されている。コイルばね５１の代わりに、弾性部材としてゴムから構成される部材や、ポリウレタン樹脂から構成される部材を配置しても構わなく、スライド用接続シャフト４２を収容部４０の奥に向かって、即ち、端面５３が奥面５２に近づく方向に付勢できれば良く、付勢する力を適宜調整する等の目的にて、コイルばね５１の代わりに公知の弾性部材を適宜選択して使用も構わない。また、直線凸部４９と直線凹部５０とは、互いに係合すればよく、直線状に延在していなくても良い。 The coil spring 51 is provided between the slide connection shaft 42 and the fixed connection shaft 41 of each third connecting portion 7, and the slide connection shaft 42 is moved toward the back of the housing portion 40, that is, the end surface. 53 is urged toward the back surface 52. The coil spring 51 is disposed between the shafts 41 and 42 by a spring support member 54 (shown in FIG. 8) attached to the sound emitting unit 4. Instead of the coil spring 51, a member made of rubber as an elastic member or a member made of polyurethane resin may be arranged, and the slide connection shaft 42 is moved toward the back of the housing portion 40, that is, It is sufficient that the end surface 53 can be biased in a direction approaching the back surface 52, and a known elastic member may be appropriately selected and used instead of the coil spring 51 for the purpose of appropriately adjusting the biasing force. Moreover, the linear convex part 49 and the linear recessed part 50 should just be mutually engaged, and do not need to extend linearly.

前述した構成の第２維持機構４８は、コイルばね５１がスライド用接続シャフト４２を収容部４０の奥に向かって付勢し、直線凸部４９と直線凹部５０とが互いに係合することで、第３の軸芯Ｐ３周りの放音部４と腕部３との相対的な位置を維持する。 In the second maintenance mechanism 48 configured as described above, the coil spring 51 urges the slide connection shaft 42 toward the back of the housing portion 40, and the linear convex portion 49 and the linear concave portion 50 are engaged with each other. The relative positions of the sound emitting part 4 and the arm part 3 around the third axis P3 are maintained.

前述した構成のヘッドホン１は、ヘッドバンド２が人の頭に掛けられ、放音部４のイヤパッド１１が当該人の耳を覆った状態で、音声電流が書く放音部４のスピーカユニットに供給されて、当該音声電流に応じた音を発生して、当該音を人に伝達する。 The headphone 1 having the above-described configuration is supplied to the speaker unit of the sound emitting unit 4 in which the audio current is written in a state where the headband 2 is hung on the person's head and the ear pad 11 of the sound emitting unit 4 covers the ear of the person. Then, a sound corresponding to the sound current is generated and the sound is transmitted to a person.

本実施例によれば、放音部４を支持した腕部３がヘッドバンド２に対して第１の軸芯Ｐ１周りに回転された際に、当該腕部３を中立位置に向かって付勢するねじりコイルばね１６を設けているので、例えば、人の耳に放音部を接触させてスピーカが発する再生音を聞き、外部の音を聞く場合には放音部を人の耳とは反対側に向け、再度、再生音を聞く場合にはねじりコイルばね１６の付勢力によって腕部３が中立位置に復帰する。 According to this embodiment, when the arm portion 3 supporting the sound emitting portion 4 is rotated around the first axis P1 with respect to the headband 2, the arm portion 3 is biased toward the neutral position. Since the torsion coil spring 16 is provided, for example, when the sound emission part is brought into contact with the human ear to hear the reproduction sound emitted from the speaker and the external sound is heard, the sound emission part is opposite to the human ear. When the playback sound is heard again, the arm 3 is returned to the neutral position by the biasing force of the torsion coil spring 16.

このため、放音部４の使用時などでは、腕部３が中立位置に保たれ、放音部４の不使用時には所望の向きに放音部を回転させておくことができる。また、持ち運びの際に、放音部４がヘッドバンド２に対して小刻みに回転することを抑止して、異音を生じることを抑止できる。また、腕部３即ち放音部４が中立位置に位置付けられるので、腕部３が第１の連結部５の回転許容範囲を超えることを確実に抑止でき、不意に、第１の連結部５などが破損することを抑止できる。 For this reason, when the sound emitting unit 4 is used, the arm 3 is kept in the neutral position, and when the sound emitting unit 4 is not used, the sound emitting unit can be rotated in a desired direction. Moreover, when carrying around, it can suppress that the sound emission part 4 rotates with respect to the headband 2 little by little, and can suppress producing an abnormal noise. Further, since the arm portion 3, that is, the sound emitting portion 4 is positioned at the neutral position, it is possible to reliably prevent the arm portion 3 from exceeding the allowable rotation range of the first connecting portion 5, and unexpectedly the first connecting portion 5 Can be prevented from being damaged.

また、ねじりコイルばね１６が、円環状の弾性変形部２２と、一対の棒状の棒状部２３とを備えて、一方の棒状部２３が腕部３に取り付けられ、他方の棒状部２３がヘッドバンド２に取り付けられている。このため、簡便な構造で、ねじりコイルばね１６が腕部３を中立位置に向かって付勢することができる。 Further, the torsion coil spring 16 includes an annular elastic deformation portion 22 and a pair of rod-like rod-like portions 23, one rod-like portion 23 is attached to the arm portion 3, and the other rod-like portion 23 is a headband. 2 is attached. For this reason, the torsion coil spring 16 can urge the arm portion 3 toward the neutral position with a simple structure.

さらに、第１の連結部５に加えて、この第１の連結部５と腕部３とを第１の軸芯Ｐ１に対して直交した第２の軸芯Ｐ２周りに回転自在に連結する第２の連結部６を備えている。このため、放音部４がヘッドバンド２に密着するように、当該放音部４を折りたたむことが可能となる。 Further, in addition to the first connecting portion 5, the first connecting portion 5 and the arm portion 3 are rotatably connected around a second axis P2 orthogonal to the first axis P1. Two connecting portions 6 are provided. For this reason, the sound emission part 4 can be folded so that the sound emission part 4 is in close contact with the headband 2.

また、第１の連結部５を構成する第１接続用部材１２と、第２の連結部６を構成する第２接続用部材２４とを一体に設けた接続用部材２８を備えている。このため、第１の連結部５に加えて第２の連結部６を設けても、部品点数の増加を抑止することができる。 In addition, the first connecting member 12 constituting the first connecting portion 5 and the second connecting member 24 constituting the second connecting portion 6 are integrally provided. For this reason, even if the 2nd connection part 6 is provided in addition to the 1st connection part 5, the increase in a number of parts can be suppressed.

さらに、第１接続用部材１２がねじりコイルばね１６を収容した円筒状に形成され、第２接続用部材２４がシャフト２７を収容した円筒状に形成されている。このため、第１の連結部５に加えて第２の連結部６を設けても、ヘッドホン１の大型化を抑止することができる。 Further, the first connecting member 12 is formed in a cylindrical shape containing the torsion coil spring 16, and the second connecting member 24 is formed in a cylindrical shape containing the shaft 27. For this reason, even if the 2nd connection part 6 is provided in addition to the 1st connection part 5, the enlargement of the headphones 1 can be suppressed.

また、第２の軸芯Ｐ２周りの第１の連結部５と腕部３との相対的な位置を維持する維持機構３０を備えている。このため、第１の連結部５に加えて第２の連結部６を設けても、持ち運びの際に、放音部４がヘッドバンド２に対して小刻みに回転することを抑止でき、異音を生じることを抑止できるとともに、腕部３が第２の連結部６の回転許容範囲を超えることを抑止でき、不意に、第２の連結部６などが破損することを抑止できる。 Moreover, the maintenance mechanism 30 which maintains the relative position of the 1st connection part 5 around the 2nd axis P2 and the arm part 3 is provided. For this reason, even if the second connecting portion 6 is provided in addition to the first connecting portion 5, it is possible to prevent the sound emitting portion 4 from rotating with respect to the headband 2 in the case of carrying. Can be prevented, and the arm portion 3 can be prevented from exceeding the allowable rotation range of the second connecting portion 6, and the second connecting portion 6 and the like can be prevented from being damaged unexpectedly.

また、維持機構３０は、第２接続用部材２４の外周面に周方向に間隔をあけて設けられた丸形凹み３２と、腕部３から凸没自在に設けられかつ丸形凹み３２に嵌合可能な突起プレート３４と、この突起プレート３４を第２接続用部材２４の外周面に向かって付勢するコイルばね３５を備えている。このため、維持機構３０は、確実に、第２の軸芯Ｐ２周りの第１の連結部５と腕部３との相対的な位置を維持することができる。 Further, the maintenance mechanism 30 includes a round recess 32 provided on the outer peripheral surface of the second connecting member 24 at a circumferential interval, and a protrusion that can be protruded and retracted from the arm portion 3 and fitted into the round recess 32. A projecting plate 34 that can be joined, and a coil spring 35 that biases the projecting plate 34 toward the outer peripheral surface of the second connecting member 24 are provided. For this reason, the maintenance mechanism 30 can reliably maintain the relative positions of the first connecting portion 5 and the arm portion 3 around the second axis P2.

腕部３を放音部４の中央部に回転自在に連結した第３の連結部７を備えている。このため、放音部４をより任意の向きに位置付けることができる。 A third connecting portion 7 is provided that rotatably connects the arm portion 3 to the central portion of the sound emitting portion 4. For this reason, the sound emission part 4 can be positioned in more arbitrary directions.

また、第３の軸芯Ｐ３周りの放音部４と腕部３との相対的な位置を維持する第２維持機構４８を備えている。このため、更に、第３の連結部７を設けても、持ち運びの際に、放音部４がヘッドバンド２に対して小刻みに回転することを抑止でき、異音を生じることを抑止できるとともに、腕部３が第３の連結部７の回転許容範囲を超えることを抑止でき、不意に、第３の連結部７などが破損することを抑止できる。 Moreover, the 2nd maintenance mechanism 48 which maintains the relative position of the sound emission part 4 around the 3rd axis P3 and the arm part 3 is provided. For this reason, even if the third connecting portion 7 is provided, it is possible to prevent the sound emitting portion 4 from rotating with respect to the headband 2 when carrying it, and to suppress the generation of abnormal noise. The arm portion 3 can be prevented from exceeding the allowable rotation range of the third connecting portion 7, and the third connecting portion 7 and the like can be prevented from being damaged unexpectedly.

また、第２維持機構４８は、互いに係合する奥面５２と端面５３とこれらが互いに近づく方向に付勢するコイルばね５１とを備えている。更に、奥面５２に直線凸部４９を設け、端面５３に直線凹部５０を設け、これらの直線凸部４９及び直線凹部５０が直線状に延在している。このため、第２維持機構４８は、確実に、第１の軸芯Ｐ１周りの放音部４と腕部３との相対的な位置を維持することができる。 Moreover, the 2nd maintenance mechanism 48 is provided with the back surface 52 and the end surface 53 which mutually engage, and the coil spring 51 which urges | biases in the direction in which these mutually approach. Furthermore, the straight convex part 49 is provided in the back surface 52, the linear recessed part 50 is provided in the end surface 53, and these linear convex part 49 and the linear recessed part 50 are extended linearly. For this reason, the 2nd maintenance mechanism 48 can maintain the relative position of the sound emission part 4 and the arm part 3 around the 1st axial center P1 reliably.

前述の実施例では、各第３の連結部７は、固定用接続シャフト４１とスライド用接続シャフト４２とを備えているが、本発明では、図１３に示すように、第３の連結部７がスライド用接続シャフト４２を一対即ち複数備えて、第２維持機構４８のコイルばね５１がこれら一対即ち複数のスライド用接続シャフト４２間に設けられていても良い。この場合、第２維持機構４８は、より確実に、第３の軸芯Ｐ３周りの放音部４と腕部３との相対的な位置を維持することができる。なお、図１３において、前述した実施例と同一部分には、同一符号を付して説明を省略する。 In the above-described embodiment, each of the third connecting portions 7 includes the fixing connecting shaft 41 and the sliding connecting shaft 42. However, in the present invention, as shown in FIG. May include a pair of sliding connection shafts 42, that is, a plurality of sliding connection shafts 42, and the coil spring 51 of the second maintaining mechanism 48 may be provided between the pair of sliding connection shafts 42. In this case, the second maintaining mechanism 48 can more reliably maintain the relative positions of the sound emitting unit 4 and the arm unit 3 around the third axis P3. In FIG. 13, the same parts as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted.

また、前述した実施例では、直線凸部４９を奥面５２に設け、直線凹部５０を端面５３に設けたが、本発明では、図１４に示すように、直線凸部４９を端面５３に設け、直線凹部５０を奥面５２に設けても良い。なお、図１４において、前述した実施例と同一部分には、同一符号を付して説明を省略する。 Further, in the embodiment described above, the linear convex portion 49 is provided on the back surface 52 and the linear concave portion 50 is provided on the end surface 53. However, in the present invention, the linear convex portion 49 is provided on the end surface 53 as shown in FIG. The linear recess 50 may be provided on the back surface 52. In FIG. 14, the same parts as those in the above-described embodiment are designated by the same reference numerals and the description thereof is omitted.

次に、本発明の一実施例におけるイヤパットに関し、図２０、図２１を用いて説明する。 Next, an earpad according to an embodiment of the present invention will be described with reference to FIGS.

イヤパット１１は、図２０に示すように、クッション部材６４と、クッション部材６４を覆う表皮６５で構成される。 As shown in FIG. 20, the earpad 11 includes a cushion member 64 and a skin 65 that covers the cushion member 64.

クッション部材６４は、例えばポリウレタン樹脂を発泡させたポリウレタンフォーム等の公知の材料で形成されている。 The cushion member 64 is made of a known material such as polyurethane foam obtained by foaming polyurethane resin, for example.

表皮６５は、ポリウレタン樹脂からなるフィルム、又は不織布に接着用の合成樹脂を付与したシート状物（布地）等の、公知の材料から構成されており、前者は比較的小さい通気性を備え、後者は比較的大きい通気性を備えている。特に、放音部４とユーザーの耳との間の密閉性を確保すべく、比較的小さい通気性を備える材料で、表皮６５を形成することが好ましい。 The skin 65 is made of a known material such as a film made of a polyurethane resin or a sheet-like material (fabric) in which a synthetic resin for adhesion is applied to a nonwoven fabric. The former has a relatively small air permeability and the latter. Has a relatively large breathability. In particular, it is preferable to form the skin 65 with a material having a relatively small air permeability so as to ensure a sealing property between the sound emitting unit 4 and the user's ear.

ところで、表皮６５は一枚のシート状の部材を溶着又は縫い合わせにて、クッション部材６４を覆い気密な空間を形成している。溶着又は縫い合わせにて結合される接合部６６（図２１に示す）は、特に厳しい使用環境では、接合部６６における結合力が低下し、剥がれや表皮６５全体に形態変化が生じてしまう場合がある。また、接合部６６の接合力が低下することで、表皮６５内の気密な空間が形成されなくなり、放音部４とユーザーの耳との密閉性が低下する場合がある。特に、接合部６６を縫い合わせにて結合する場合には、溶着にて結合する場合に比べ、表皮６５内の空間の気密性は比較的小さくなる。 By the way, the skin 65 covers the cushion member 64 by welding or stitching together one sheet-like member to form an airtight space. In the joint portion 66 (shown in FIG. 21) joined by welding or stitching, the joint force at the joint portion 66 is reduced in a particularly severe use environment, and peeling or a change in the shape of the entire skin 65 may occur. . Further, since the bonding force of the bonding portion 66 is reduced, an airtight space in the outer skin 65 is not formed, and the sealing performance between the sound emitting portion 4 and the user's ear may be reduced. In particular, when the joint 66 is joined by stitching, the airtightness of the space in the outer skin 65 is relatively smaller than when joining by welding.

そこで、接合部６６の結合力を比較的大きくすべく、本実施例では縫い合わせと溶着とを組み合わせて、結合している。縫い合わせと溶着とを組み合わせることで、例えば接合部６６に当該接合部６６を剥がす方向に外力が作用しても、縫い合わせにて、接合部６６の結合力の低下を抑止することができる。また縫い合わせだけでは不足する気密性を、溶着を行うことで気密性を比較的大きくすることができる。 Therefore, in order to make the coupling force of the joint portion 66 relatively large, in this embodiment, the stitching and the welding are combined to be coupled. By combining stitching and welding, for example, even if an external force acts on the joint portion 66 in the direction in which the joint portion 66 is peeled off, a decrease in the coupling force of the joint portion 66 can be suppressed by stitching. Moreover, the airtightness that is insufficient only by sewing can be made relatively large by performing welding.

なお、前述した実施例は本発明の代表的な形態を示したに過ぎず、本発明は、実施例に限定されるものではない。即ち、本発明の骨子を逸脱しない範囲で種々変形して実施することができる。 In addition, the Example mentioned above only showed the typical form of this invention, and this invention is not limited to an Example. That is, various modifications can be made without departing from the scope of the present invention.

１ヘッドホン
２ヘッドバンド
３腕部
４放音部
５第１の連結部
６第２の連結部
７第３の連結部
１２第１接続用部材
１６ねじりコイルばね（付勢手段）
２２弾性変形部
２３棒状部
２４第２接続用部材
２５切欠き
２７シャフト
２８接続用部材
３０維持機構（第２維持手段）
３２丸形凹み（被嵌合部）
３４突起プレート（嵌合部材）
３５コイルばね（第１付勢部材）
４０収容部
４２スライド用接続シャフト（被収容部材）
４８第２維持機構（第３維持手段）
４９直線凸部（凸部）
５０直線凹部（凹部）
５１コイルばね（第２付勢部材）
５２奥面（内面）
５８端面
Ｐ１第１の軸芯
Ｐ２第２の軸芯
Ｐ３第３の軸芯 DESCRIPTION OF SYMBOLS 1 Headphone 2 Headband 3 Arm part 4 Sound emission part 5 1st connection part 6 2nd connection part 7 3rd connection part 12 1st connection member 16 Torsion coil spring (biasing means)
DESCRIPTION OF SYMBOLS 22 Elastic deformation part 23 Rod-shaped part 24 2nd connection member 25 Notch 27 Shaft 28 Connection member 30 Maintenance mechanism (2nd maintenance means)
32 Round dent (Fitting part)
34 Projection plate (fitting member)
35 Coil spring (first biasing member)
40 accommodating portion 42 connecting shaft for slide (accommodated member)
48 Second maintenance mechanism (third maintenance means)
49 Straight convex part (convex part)
50 Straight recess (recess)
51 Coil spring (second biasing member)
52 Back (inner surface)
58 End face P1 First axis P2 Second axis P3 Third axis

Claims

A headband,
  A sound emitting part that emits sound;
  An arm portion that supports the sound emitting portion;
  A first connecting portion for rotating the arm portion around a first axis with respect to the headband;
  A second connecting portion for rotating the arm portion around a second axis perpendicular to the first axis with respect to the headband;
With
  The headphone according to claim 1, wherein when the arm portion rotates around the first axis, the second axis and the second coupling portion rotate around the first axis.

The headphone according to claim 1, wherein the second shaft core extends in a width direction of the arm portion.

The headphone according to claim 2, wherein the second connecting portion is provided on the arm portion.

The headphone according to claim 2, wherein the first axis extends in a direction perpendicular to a width direction of the headband.

The said 2nd axial center rotates along the surface perpendicular | vertical to the said 1st axial center, when the said arm part rotates around the said 1st axial core. Headphones.

The headphone according to claim 1, wherein the first axis and the second axis intersect at the second connecting portion.

The headphone according to claim 1, wherein the second connecting portion includes a columnar shape having the second axis as a central axis.

A biasing means for biasing the arm portion so that the arm portion is in a neutral position with respect to the headband when the arm portion is rotated around the first axis when the sound emitting portion is used. The headphones according to claim 1, comprising:

The headphone according to claim 8, wherein when the arm portion is in a neutral position with respect to the headband, the first axis is parallel to a direction from the headband toward the arm portion.

The headphone according to claim 1, wherein the arm portion is displaceable between a position where the sound emitting portion is deployed and a position where the sound emitting portion is folded by rotation around the second axis.

The third connecting portion for rotating the arm portion around a third axis parallel to the second axis is provided on the opposite side of the sound emitting portion from the acoustic radiation side. The listed headphones.

12. The third shaft core and the third connecting portion rotate around the first axis when the arm rotates around the first axis. Headphones.

The headphone according to claim 11, wherein the third connecting portion is provided on the arm portion.

One end of the arm portion on the headband side is provided with the second connecting portion, and one end of the arm portion on the opposite side of the sound emitting side of the sound emitting portion is provided with the third connecting portion. The headphone according to claim 13, wherein the headphone is provided.