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JP2024061454A - Open-type earphones - Google Patents

Open-type earphones Download PDF

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Publication number
JP2024061454A
JP2024061454A JP2022169420A JP2022169420A JP2024061454A JP 2024061454 A JP2024061454 A JP 2024061454A JP 2022169420 A JP2022169420 A JP 2022169420A JP 2022169420 A JP2022169420 A JP 2022169420A JP 2024061454 A JP2024061454 A JP 2024061454A
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ear
open
acoustic duct
communication passage
speaker
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JP7320316B1 (en
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明彦 保坂
Akihiko Hosaka
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Move Co Ltd
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Move Co Ltd
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Priority to JP2022169420A priority Critical patent/JP7320316B1/en
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Publication of JP7320316B1 publication Critical patent/JP7320316B1/en
Priority to EP23879892.0A priority patent/EP4593413A4/en
Priority to PCT/JP2023/038031 priority patent/WO2024085250A1/en
Priority to KR1020257013270A priority patent/KR20250064686A/en
Priority to CN202380013577.3A priority patent/CN118104251B/en
Publication of JP2024061454A publication Critical patent/JP2024061454A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1016—Earpieces of the intra-aural type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1058—Manufacture or assembly
    • H04R1/1075—Mountings of transducers in earphones or headphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/105—Earpiece supports, e.g. ear hooks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
    • H04R2201/109—Arrangements to adapt hands free headphones for use on both ears
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/09—Non-occlusive ear tips, i.e. leaving the ear canal open, for both custom and non-custom tips
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/11—Aspects relating to vents, e.g. shape, orientation, acoustic properties in ear tips of hearing devices to prevent occlusion

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Headphones And Earphones (AREA)

Abstract

To provide an open-type earphone that does not press against the ear, makes it easy to hear ambient sounds, and has high sound insulation and no sound leakage.SOLUTION: An open-type earphone 1 includes an earphone body 2 with at least a built-in speaker 5 and an acoustic duct 3 that extends diagonally from the earphone body 2 and is inserted into an ear canal 11 of an ear. The acoustic duct 3 has a first connecting passage 6 that connects the speaker 5 to the ear canal 11 and a second connecting passage 7 that connects the atmosphere to the ear canal 11. The second connecting passage 7 may also be composed of a groove 8 formed in the outer surface of the acoustic duct 3. An ear ring 4 may be attached to the acoustic duct 3, one end of which is in contact with a tragus 12 of the ear and the other end of which is in contact with an inner wall 13 of an ear concha. Furthermore, the ear ring 4 may be composed of two rings 4A, 4B connected and integrated together.SELECTED DRAWING: Figure 6

Description

本発明は、周囲の環境音も取り入れることができるオープン型イヤホンに関する。 The present invention relates to open-type earphones that can also take in surrounding environmental sounds.

通常、空気によって伝達される音の振動は、耳の中にある鼓膜へ伝達され、鼓膜の振動は、鼓膜の中にある３つの耳小骨を介して蝸牛に伝達される。蝸牛にはリンパ液があり、このリンパ液の振動が電気信号に変換されながら聴覚神経へと伝達され、この電気信号を脳が音として認識する。 Normally, sound vibrations transmitted by air are transmitted to the eardrum inside the ear, and the vibrations of the eardrum are transmitted to the cochlea via three ossicles inside the eardrum. The cochlea contains lymphatic fluid, and the vibrations of this lymphatic fluid are converted into electrical signals and transmitted to the auditory nerve, which the brain recognizes as sound.

ところで、ユーザーの耳に装着されるイヤホンは、耳に近接配置されたスピーカーに音声信号を印加することによって音声を再生するものがあるが、このイヤホンには、大別してインナーイヤー型とカナル（耳栓）型との２タイプがある。 Incidentally, some earphones are worn in the user's ears and play sound by applying an audio signal to a speaker placed close to the ear. These earphones can be broadly divided into two types: inner-ear type and in-ear (earplug) type.

インナーイヤー型イヤホン（例えば、特許文献１参照）は、耳の入口にある耳甲介と称される部分に引っ掛けて使用され、圧迫感がなく、周囲の環境音を聞き取り易いというメリットを有している。これに対して、カナル型イヤホン（例えば、特許文献２参照）は、耳栓型のイヤーピースを耳の中に入れて使用されるため、高い遮音性が得られ、音漏れしないというメリットを有している。 Inner-ear earphones (see, for example, Patent Document 1) are used by hooking onto a part of the ear called the concha at the entrance to the ear, and have the advantage that they do not feel oppressive and make it easy to hear surrounding environmental sounds. In contrast, canal-type earphones (see, for example, Patent Document 2) are used by inserting earplug-type earpieces inside the ear, and have the advantage that they provide high sound insulation and do not leak sound.

特開２００６－２２２４９２号公報JP 2006-222492 A 特開２０１９－１４５９６２号公報JP 2019-145962 A

しかしながら、インナーイヤー型イヤホンは、遮音性が低く音漏れし易いというデメリットを有している。これに対して、カナル型イヤホンは、イヤーピースを耳の奥に入れ込むため、耳への圧迫感が強く、周囲の環境音を聞き取りにくいというデメリットを有している。 However, inner-ear earphones have the disadvantage of low sound insulation and a tendency for sound to leak. In contrast, canal-type earphones have the disadvantage that the earpieces are inserted deep inside the ear, which puts a lot of pressure on the ear and makes it difficult to hear ambient sounds.

本発明は、上記問題に鑑みてなされたもので、その目的は、耳への圧迫感がなく、周囲の環境音を聞き取り易く、且つ、遮音性が高くて音漏れしないオープン型イヤホンを提供することにある。 The present invention was made in consideration of the above problems, and its purpose is to provide open-type earphones that do not feel oppressive to the ears, make it easy to hear surrounding environmental sounds, and have high sound insulation and no sound leakage.

上記目的を達成するための本発明は、少なくともスピーカーを内蔵したイヤホン本体と、該イヤホン本体から斜めに延びて耳の外耳道に挿入される音響ダクトを備えたオープン型イヤホンであって、前記音響ダクトに、前記スピーカーと耳の外耳道とを連通させる第１連通路と、大気と耳の外耳道とを連通させる第２連通路とを形成したことを特徴とする。 The present invention, which aims to achieve the above object, is an open-type earphone that includes an earphone body with at least a built-in speaker and an acoustic duct that extends obliquely from the earphone body and is inserted into the ear canal of the ear, and is characterized in that the acoustic duct is formed with a first communication passage that connects the speaker to the ear canal of the ear, and a second communication passage that connects the atmosphere to the ear canal of the ear.

本発明によれば、音響ダクトには、スピーカーと耳の外耳道とを連通させる第１連通路と、大気と耳の外耳道とを連通させる第２連通路とが形成されているため、周囲の環境音が第２連通路を通ってユーザーの耳の外耳道へと導入される。したがって、ユーザーは、第１連通路を通って外耳道へと導入されるスピーカー音と共に第２連通路を通って外耳道へと導入される周囲の環境音も同時に聞くことができる。そして、スピーカー音は、第１連通路を通過してさらに第２連通路を通って大気中に抜けるため、その経路が長くなり、該スピーカー音の外部への漏れ（音漏れ）が防がれる。さらに、環境音が大きな場所でもスピーカー音をはっきりと聞くことができるとともに、タッチノイズやユーザー自身の声が響くことがない。 According to the present invention, the acoustic duct is formed with a first communication passage that connects the speaker to the ear canal of the ear, and a second communication passage that connects the atmosphere to the ear canal of the ear, so that ambient environmental sound is introduced into the ear canal of the user's ear through the second communication passage. Therefore, the user can simultaneously hear the speaker sound that is introduced into the ear canal through the first communication passage and the ambient environmental sound that is introduced into the ear canal through the second communication passage. The speaker sound passes through the first communication passage and then through the second communication passage to escape into the atmosphere, so the path is longer and the speaker sound is prevented from leaking to the outside (sound leakage). Furthermore, the speaker sound can be clearly heard even in places with loud ambient noise, and there is no touch noise or the user's own voice reverberating.

また、オープン型イヤホンは、音響ダクトをユーザーの耳の外耳道に挿入することによって装着されるため、音響ダクトが耳を圧迫することがなく、ユーザーに快適な装着感を与えることができる。 In addition, open-type earphones are worn by inserting the acoustic duct into the ear canal of the user's ear, so the acoustic duct does not put pressure on the ear, providing the user with a comfortable fit.

したがって、本発明に係るオープン型イヤホンによれば、インナーイヤー型イヤホンとカナル型イヤホンの各デメリットを解消しつつ、両イヤホンのメリットのみを享受することができる。 Therefore, the open-type earphones of the present invention allow users to enjoy the advantages of both inner-ear type earphones and in-ear type earphones while eliminating the disadvantages of each.

本発明に係るオープン型イヤホンを斜め上方から見た斜視図である。1 is a perspective view of an open-type earphone according to the present invention, seen obliquely from above. 本発明に係るオープン型イヤホンを斜め下方から見た斜視図である。1 is a perspective view of an open-type earphone according to the present invention, seen obliquely from below. 本発明に係るオープン型イヤホンの側面図である。1 is a side view of an open-type earphone according to the present invention. 本発明に係るオープン型イヤホンの破断側面図である。FIG. 1 is a cutaway side view of an open-type earphone according to the present invention. 本発明に係るオープン型イヤホンの分解斜視図である。1 is an exploded perspective view of an open-type earphone according to the present invention; 本発明に係るオープン型イヤホンの使用状態を示すユーザーの耳部分の破断面図である。1 is a cross-sectional view of a user's ear showing how the open-type earphone according to the present invention is used; FIG. 本発明の別形態に係るオープン型イヤホンを斜め下方から見た斜視図である。11 is a perspective view of an open-type earphone according to another embodiment of the present invention, seen obliquely from below.

以下に本発明の実施の形態を添付図面に基づいて説明する。なお、以下の説明においては、図１及び図３に示す矢印方向をそれぞれ「前後」方向、「上下」方向とする。 The following describes an embodiment of the present invention with reference to the accompanying drawings. In the following description, the arrow directions shown in Figures 1 and 3 are the "front-back" and "up-down" directions, respectively.

本実施形態に係るオープン型イヤホン１は、平面視長円状のイヤホン本体２と、該イヤホン本体２から斜め下方に延びる円筒状の音響ダクト３と、該音響ダクト３から前方（図１～図６の左方）に向かって延びるイヤーリング４を備えている。 The open-type earphone 1 according to this embodiment includes an earphone body 2 that is elliptical in plan view, a cylindrical acoustic duct 3 that extends diagonally downward from the earphone body 2, and an ear ring 4 that extends forward (to the left in Figs. 1 to 6) from the acoustic duct 3.

上記イヤホン本体２は、上ケース２Ａと下ケース２Ｂとを接合一体化して構成されるケース体であって、下ケース２Ｂの前端部からは音響ダクト３の一部を構成する上ダクト片３Ａが下方に向かって斜め後方に所定角度θ（図３参照）だけ傾斜するように一体に延びている。ここで、音響ダクト３は、上下に２分割されており、下ケース２Ｂに一体に形成された前記上ダクト片３Ａと、該上ダクト片３Ａに着脱可能な円筒状の下ダクト片３Ｂとで構成されている。以下、上ダクト片３Ａと下ダクト片３Ｂの着脱構造について説明する。 The earphone main body 2 is a case body formed by joining an upper case 2A and a lower case 2B together, and an upper duct piece 3A that constitutes part of the acoustic duct 3 extends integrally from the front end of the lower case 2B so as to be inclined diagonally downward and backward at a predetermined angle θ (see FIG. 3). Here, the acoustic duct 3 is divided into two parts, an upper part and an lower part, and is composed of the upper duct piece 3A that is formed integrally with the lower case 2B, and a cylindrical lower duct piece 3B that can be attached and detached to the upper duct piece 3A. The detachable structure of the upper duct piece 3A and the lower duct piece 3B will be explained below.

すなわち、図４及び図５に示すように、上ダクト片３Ａの下端外周には嵌合溝３ａが全周に亘って形成されており、上ダクト片３Ａの嵌合溝３ａの下方（下端部）には円環状の嵌合凸部３ｂが形成されている。また、下ダクト片３Ｂの上端部内周には嵌合溝３ｃが全周に亘って形成されており、下ダクト片３Ｂの上端内周には円環状の嵌合凸部３ｄが形成されている。したがって、下ダクト片３Ｂの上端部内周に上ダクト片３Ａの下端部外周を上方から嵌め込み、図４に示すように、上ダクト片３Ａの嵌合凸部３ｂを下ダクト片３Ｂの嵌合溝３ｃに嵌め込むとともに、下ダクト片３Ｂの嵌合凸部３ｄを上ダクト片３Ａの嵌合溝３ａに嵌め込むことによって、上ダクト片３Ａと下ダクト片３Ｂとが連結一体化される。 That is, as shown in Figs. 4 and 5, a fitting groove 3a is formed around the entire circumference of the outer periphery of the lower end of the upper duct piece 3A, and a ring-shaped fitting protrusion 3b is formed below the fitting groove 3a (lower end) of the upper duct piece 3A. Also, a fitting groove 3c is formed around the entire circumference of the inner periphery of the upper end of the lower duct piece 3B, and a ring-shaped fitting protrusion 3d is formed on the inner periphery of the upper end of the lower duct piece 3B. Therefore, the outer periphery of the lower end of the upper duct piece 3A is fitted from above into the inner periphery of the upper end of the lower duct piece 3B, and as shown in Fig. 4, the fitting protrusion 3b of the upper duct piece 3A is fitted into the fitting groove 3c of the lower duct piece 3B, and the fitting protrusion 3d of the lower duct piece 3B is fitted into the fitting groove 3a of the upper duct piece 3A, thereby connecting and integrating the upper duct piece 3A and the lower duct piece 3B.

ここで、本実施形態では、音響ダクト３のイヤホン本体２に対する傾斜角θは、θ＝６０°に設定されているが、この傾斜角θは、６０°±１０°（５０°～７０°）に設定されるべきである。また、本実施形態では、イヤホン本体２（上ケース２Ａと下ケース２Ｂ）と音響ダクト３は、剛性の高いＡＢＳ樹脂などの硬質樹脂で構成されている。 In this embodiment, the inclination angle θ of the acoustic duct 3 relative to the earphone main body 2 is set to θ = 60°, but this inclination angle θ should be set to 60° ± 10° (50° to 70°). Also, in this embodiment, the earphone main body 2 (upper case 2A and lower case 2B) and the acoustic duct 3 are made of a hard resin such as ABS resin, which has high rigidity.

ところで、イヤホン本体２には、スピーカー５の他、各種電子部品を実装した基板などが収容されているが、スピーカー５は、図４に示すように、イヤホン本体２内の音響ダクト３の直上のユーザーの耳に接触しない位置に配置されている。このような位置にスピーカー５を配置することによって、該スピーカー５の音質を良くするために該スピーカー５の口径を十分大きくしても、このスピーカー５が耳の邪魔になることがない。なお、本実施形態では、スピーカー５をイヤホン本体２内に水平に収容したが、このスピーカー５を垂直に配置して収容するようにしてもよい。 The earphone body 2 contains the speaker 5 as well as a board on which various electronic components are mounted. As shown in FIG. 4, the speaker 5 is located directly above the acoustic duct 3 inside the earphone body 2 in a position that does not contact the user's ear. By locating the speaker 5 in such a position, the speaker 5 does not get in the way of the ear, even if the aperture of the speaker 5 is made sufficiently large to improve the sound quality of the speaker 5. Note that in this embodiment, the speaker 5 is housed horizontally inside the earphone body 2, but the speaker 5 may also be housed vertically.

そして、音響ダクト３の下ダクト片３Ｂの前面からは、前記イヤーリング４が略水平に前方に向かって延びているが、このイヤーリング４は、円形リング状の２つのリング４Ａ，４Ｂを連結一体化して構成されており、音響ダクト３の下ダクト片３Ｂと共にイヤホン本体２に着脱可能に取り付けられている。なお、イヤーリング４は、弾性変形可能な柔軟なシリコンまたはエラスマーによって構成されている。 The ear ring 4 extends forward almost horizontally from the front surface of the lower duct piece 3B of the acoustic duct 3. This ear ring 4 is made by connecting and integrating two circular rings 4A and 4B, and is detachably attached to the earphone body 2 together with the lower duct piece 3B of the acoustic duct 3. The ear ring 4 is made of flexible silicone or elastomer that can be elastically deformed.

而して、本実施形態に係るオープン型イヤホン１においては、図４及び図６に示すように、音響ダクト３の軸中心部には、当該オープン型イヤホン１をユーザーが耳に装着した状態において、イヤホン本体２に内蔵されたスピーカー５と耳の外耳道１１（図６参照）とを連通させる円孔状の第１連通路６が形成されている。すなわち、第１連通路６の上端は、イヤホン本体２内に開口しており、第１連通路６の下端は、耳の外耳道１１に開口している。また、音響ダクト３の下ダクト片３Ｂの前面側（図４の左側）には、大気と耳の外耳道１１とを連通させる第２連通路７が形成されている。この第２連通路７は、図２及び図５に示すように、その上端が下ダクト片３Ｂの上端部に形成された円孔７ａを介して大気に開口しており、下端が下ダクト片３Ｂの底面に形成された円孔７ｂを介して耳の外耳道１１に開口している。 In the open-type earphone 1 according to this embodiment, as shown in FIG. 4 and FIG. 6, a circular hole-shaped first communication passage 6 is formed in the axial center of the acoustic duct 3, which connects the speaker 5 built into the earphone body 2 with the ear canal 11 (see FIG. 6) when the open-type earphone 1 is worn by the user. That is, the upper end of the first communication passage 6 opens into the earphone body 2, and the lower end of the first communication passage 6 opens into the ear canal 11. In addition, a second communication passage 7 is formed on the front side (left side of FIG. 4) of the lower duct piece 3B of the acoustic duct 3, which connects the atmosphere with the ear canal 11. As shown in FIG. 2 and FIG. 5, the upper end of this second communication passage 7 opens into the atmosphere through a circular hole 7a formed in the upper end of the lower duct piece 3B, and the lower end opens into the ear canal 11 through a circular hole 7b formed in the bottom surface of the lower duct piece 3B.

なお、以上はユーザーの一方（左または右）の耳に装着されるオープン型イヤホン１の構成について説明したが、他方（右または左）の耳に装着されるオープン型イヤホン１の構成は一方のそれと全く同じであるため、これについての図示及び説明は省略する。 The above describes the configuration of the open-type earphone 1 that is worn on one ear (left or right) of the user, but the configuration of the open-type earphone 1 that is worn on the other ear (left or right) is exactly the same as that of the other, so illustrations and descriptions of it will be omitted.

ここで、本実施形態に係るオープン型イヤホン１がユーザーの耳に装着されている状態を図６に示すが、当該オープン型イヤホン１は、イヤーリング４（リング４Ａ）の端面が耳のトラガス（耳珠）１２に当接する向きに装着される。すなわち、音響ダクト３が耳の外耳道１１に挿入されることによって、当該オープン型イヤホン１がユーザーの耳に装着されるが、このとき、イヤーリング４が耳のトラガス１２に当接する。すると、イヤーリング４がトラガス１２によって押圧されるため、該イヤーリング４が耳甲介の内壁１３に押し当てられ、リング４Ｂが弾性変形して円弧状に撓む。このため、イヤーリング４と音響ダクト３が耳のトラガス１２と耳甲介の内壁１３との間で挟持され、当該オープン型イヤホン１がユーザーの耳にフィットした状態で確実に装着される。 Here, FIG. 6 shows the state in which the open-type earphone 1 according to this embodiment is worn on the user's ear, and the open-type earphone 1 is worn in a direction in which the end face of the ear ring 4 (ring 4A) abuts on the tragus (tragus) 12 of the ear. That is, the open-type earphone 1 is worn on the user's ear by inserting the acoustic duct 3 into the ear canal 11 of the ear, and at this time, the ear ring 4 abuts on the tragus 12 of the ear. Then, the ear ring 4 is pressed by the tragus 12, so that the ear ring 4 is pressed against the inner wall 13 of the concha, and the ring 4B is elastically deformed and bent into an arc shape. Therefore, the ear ring 4 and the acoustic duct 3 are sandwiched between the tragus 12 of the ear and the inner wall 13 of the concha, and the open-type earphone 1 is securely worn in a state where it fits the user's ear.

以上のように、オープン型イヤホン１がユーザーの左右の耳にフィットして装着されると、スピーカー５から発せられる音声（スピーカー音）は、図６に矢印ａにて示すように、音響ダクト３の中心部に形成された第１連通路６を通って鼓膜を経て蝸牛へと伝わり、蝸牛のリンパ液の振動が電気信号に変換されながら聴覚神経へと伝達され、この電気信号を脳が音として認識する。また、周囲の環境音は、図６に矢印ｂにて示すように、音響ダクト３に形成された第２連通路７を通って鼓膜を経て蝸牛へと伝わり、蝸牛のリンパ液の振動が電気信号に変換されながら聴覚神経へと伝達され、この電気信号を脳が音として認識する。 As described above, when the open-type earphones 1 are fitted and worn in the left and right ears of the user, the sound (speaker sound) emitted from the speaker 5 is transmitted through the first communication passage 6 formed in the center of the acoustic duct 3 to the eardrum and then to the cochlea, as shown by the arrow a in FIG. 6, where the vibrations of the lymph fluid in the cochlea are converted into electrical signals and then transmitted to the auditory nerve, which the brain recognizes as sound. In addition, the surrounding environmental sounds are transmitted through the second communication passage 7 formed in the acoustic duct 3 to the eardrum and then to the cochlea, as shown by the arrow b in FIG. 6, where the vibrations of the lymph fluid in the cochlea are converted into electrical signals and then transmitted to the auditory nerve, which the brain recognizes as sound.

上述のように、本実施形態に係るオープン型イヤホン１においてば、音響ダクト３には、スピーカー５と耳の外耳道１１とを連通させる第１連通路６と、大気と耳の外耳道１１とを連通させる第２連通路７とが形成されているため、周囲の環境音が第２連通路７を通ってユーザーの耳の外耳道１１へと導入される。したがって、ユーザーは、第１連通路６を通って外耳道へと導入されるスピーカー音と共に第２連通路７を通って外耳道１１へと導入される周囲の環境音も同時に聞くことができる。そして、スピーカー音は、第１連通路６を通過してさらに第２連通路７を通って大気中に抜けるため、その経路が長くなり、該スピーカー音の外部への漏れ（音漏れ）が防がれる。さらに、環境音が大きな場所でもスピーカー音をはっきりと聞くことができるとともに、タッチノイズやユーザー自身の声が響くことがない。 As described above, in the open-type earphone 1 according to this embodiment, the acoustic duct 3 is formed with the first communication passage 6 that connects the speaker 5 to the ear canal 11 of the ear, and the second communication passage 7 that connects the atmosphere to the ear canal 11 of the ear, so that the surrounding environmental sound is introduced into the ear canal 11 of the user's ear through the second communication passage 7. Therefore, the user can simultaneously hear the speaker sound that is introduced into the ear canal through the first communication passage 6 and the surrounding environmental sound that is introduced into the ear canal 11 through the second communication passage 7. The speaker sound passes through the first communication passage 6 and then through the second communication passage 7 to escape into the atmosphere, so the path is long and the speaker sound is prevented from leaking to the outside (sound leakage). Furthermore, the speaker sound can be clearly heard even in places where the environmental sound is loud, and touch noise and the user's own voice do not resonate.

また、本実施形態に係るオープン型イヤホン１は、音響ダクト３をユーザーの耳の外耳道に挿入することによって装着され、イヤーリング４によってユーザーの耳に確実に装着されるため、音響ダクト３が耳を圧迫することがなく、ユーザーに快適な装着感を与えることができる。そして、本実施形態では、音響ダクト３の下ダクト片３Ｂとイヤーリング４とを一体に形成し、これらを上ダクト片３Ａ（イヤホン本体２）に対して着脱可能に構成したため、イヤーリング４をユーザーの耳甲介や外耳道１１の大きさや形状に適合するものに簡単に交換することができる。なお、イヤーリング４を単体で構成し、単体のイヤーリング４を音響ダクト３に対して着脱可能に取り付けるようにしてもよい。 The open-type earphone 1 according to this embodiment is attached by inserting the acoustic duct 3 into the ear canal of the user's ear, and is securely attached to the user's ear by the ear ring 4, so that the acoustic duct 3 does not press on the ear, providing the user with a comfortable fit. In this embodiment, the lower duct piece 3B of the acoustic duct 3 and the ear ring 4 are integrally formed and configured to be detachable from the upper duct piece 3A (earphone body 2), so that the ear ring 4 can be easily replaced with one that fits the size and shape of the user's concha and ear canal 11. The ear ring 4 may be configured as a single unit, and the single ear ring 4 may be attached detachably to the acoustic duct 3.

以上の結果、本実施形態に係るオープン型イヤホン１によれば、インナーイヤー型イヤホンとカナル型イヤホンの各デメリットを解消しつつ、両イヤホンのメリットのみを享受することができる。 As a result of the above, the open-type earphone 1 according to this embodiment allows users to enjoy the advantages of both inner-ear type earphones and canal type earphones while eliminating the disadvantages of each.

ところで、以上の実施形態では、第２連通路７を音響ダクト３（下ダクト片３Ｂ）の側壁の内部に形成したが、図７に示すように、音響ダクト３の外周の一部に縦方向に沿って形成された直線状の溝８によって第２通路を構成してもよい。 In the above embodiment, the second communication passage 7 is formed inside the side wall of the acoustic duct 3 (lower duct piece 3B), but as shown in FIG. 7, the second passage may be formed by a linear groove 8 formed vertically on part of the outer periphery of the acoustic duct 3.

なお、本発明は、以上説明した実施の形態に適用が限定されるものではなく、特許請求の範囲及び明細書と図面に記載された技術的思想の範囲内で種々の変形が可能であることは勿論である。 The present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the claims and the technical ideas described in the specification and drawings.

１：オープン型イヤホン、２：イヤホン本体、２Ａ：上ケース、２Ｂ：下ケース、
３：音響ダクト、３Ａ：音響ダクトの上ダクト片、３Ｂ：音響ダクトの下ダクト片、
３ａ：上ダクト片の嵌合溝、３ｂ：上ダクト片の嵌合凸部、
３ｃ：下ダクト片の嵌合溝、３ｄ：下ダクト片の嵌合凸部、４：イヤーリング、
４Ａ，４Ｂ：リング、５：スピーカー、６：第１連通路、７：第２連通路、
７ａ，７ｂ：第２連通路の円孔、８：溝（第２連通路）、１１：外耳道、
１２：トラガス、１３：耳甲介の内壁 1: Open type earphone, 2: Earphone body, 2A: Upper case, 2B: Lower case,
3: Acoustic duct, 3A: Upper duct piece of acoustic duct, 3B: Lower duct piece of acoustic duct,
3a: fitting groove of upper duct piece, 3b: fitting protrusion of upper duct piece,
3c: fitting groove of lower duct piece, 3d: fitting protrusion of lower duct piece, 4: ear ring,
4A, 4B: ring, 5: speaker, 6: first communication passage, 7: second communication passage,
7a, 7b: circular hole of second communication passage, 8: groove (second communication passage), 11: external auditory canal,
12: tragus, 13: inner wall of the concha

本発明は、上記問題に鑑みてなされたもので、その目的は、ユーザーの耳にフィットした状態で圧迫感なく確実に装着されるとともに、周囲の環境音を聞き取り易く、且つ、遮音性が高くて音漏れしないオープン型イヤホンを提供することにある。 The present invention has been made in consideration of the above problems, and its purpose is to provide open-type earphones that fit securely in the user's ears without feeling any pressure, make it easy to hear surrounding environmental sounds, and have high sound insulation properties and no sound leakage.

上記目的を達成するための本発明は、少なくともスピーカーを内蔵したイヤホン本体と、該イヤホン本体から斜めに延びて耳の外耳道の少なくともトラガスよりも奥に挿入される音響ダクトを備えたオープン型イヤホンであって、前記音響ダクトに、一端が耳のトラガスに当接し、他端が耳甲介の内壁に当接するイヤーリングを取り付けるとともに、前記音響ダクトに、前記スピーカーと耳の外耳道とを連通させる第１連通路と、大気と耳の外耳道とを連通させる第２連通路とを形成したことを特徴とする。 In order to achieve the above object, the present invention provides an open-type earphone comprising an earphone main body having at least a built-in speaker, and an acoustic duct extending obliquely from the earphone main body and inserted into the ear canal at least deeper than the tragus , wherein an ear ring is attached to the acoustic duct, one end of which abuts against the tragus of the ear and the other end of which abuts against the inner wall of the concha, and the acoustic duct is formed with a first communication passage that connects the speaker to the ear canal, and a second communication passage that connects the atmosphere to the ear canal.

また、オープン型イヤホンは、音響ダクトをユーザーの耳の外耳道の少なくとのトラガスよりも奥に挿入するとともに、音響ダクトに、一端が耳のトラガスに当接し、他端が耳甲介の内壁に当接するイヤーリングを取り付けたため、該イヤーリングと音響ダクトが耳のトラガスと耳甲介の間で挟持され、当該オープン型イヤホンがユーザーの耳にフィットした状態で圧迫感なく確実に装着される。 Furthermore, in open-type earphones, an acoustic duct is inserted into the ear canal of the user's ear at least deeper than the tragus , and an ear ring is attached to the acoustic duct, one end of which abuts against the tragus of the ear and the other end of which abuts against the inner wall of the concha. As a result, the ear ring and acoustic duct are held between the tragus and concha of the ear, and the open-type earphones can be securely worn without a feeling of pressure when fitted to the user's ear.

したがって、本発明に係るオープン型イヤホンによれば、ユーザーの耳にフィットした状態で圧迫感なく確実に装着することができるとともに、インナーイヤー型イヤホンとカナル型イヤホンの各デメリットを解消しつつ、両イヤホンのメリットのみを享受することができる。 Therefore, the open-type earphones of the present invention can be securely worn without feeling any pressure while fitting snugly against the user's ears, and allow the user to enjoy only the advantages of both inner-ear type earphones and canal type earphones while eliminating the disadvantages of each.

上述のように、本実施形態に係るオープン型イヤホン１においては、音響ダクト３には、スピーカー５と耳の外耳道１１とを連通させる第１連通路６と、大気と耳の外耳道１１とを連通させる第２連通路７とが形成されているため、周囲の環境音が第２連通路７を通ってユーザーの耳の外耳道１１へと導入される。したがって、ユーザーは、第１連通路６を通って外耳道へと導入されるスピーカー音と共に第２連通路７を通って外耳道１１へと導入される周囲の環境音も同時に聞くことができる。そして、スピーカー音は、第１連通路６を通過してさらに第２連通路７を通って大気中に抜けるため、その経路が長くなり、該スピーカー音の外部への漏れ（音漏れ）が防がれる。さらに、環境音が大きな場所でもスピーカー音をはっきりと聞くことができるとともに、タッチノイズやユーザー自身の声が響くことがない。
 As described above, in the open-type earphone 1 according to the present embodiment, the acoustic duct 3 is formed with the first communication passage 6 that connects the speaker 5 to the ear canal 11 of the ear, and the second communication passage 7 that connects the atmosphere to the ear canal 11 of the ear, so that the surrounding environmental sound is introduced into the ear canal 11 of the user's ear through the second communication passage 7. Therefore, the user can simultaneously hear the speaker sound introduced into the ear canal through the first communication passage 6 and the surrounding environmental sound introduced into the ear canal 11 through the second communication passage 7. The speaker sound passes through the first communication passage 6 and then through the second communication passage 7 to escape into the atmosphere, so that the path is long and the speaker sound is prevented from leaking to the outside (sound leakage). Furthermore, the speaker sound can be clearly heard even in places where the environmental sound is loud, and touch noise and the user's own voice do not resonate.

Claims (5)

少なくともスピーカーを内蔵したイヤホン本体と、該イヤホン本体から斜めに延びて耳の外耳道に挿入される音響ダクトを備えたオープン型イヤホンであって、
前記音響ダクトに、前記スピーカーと耳の外耳道とを連通させる第１連通路と、大気と耳の外耳道とを連通させる第２連通路とを形成したことを特徴とするオープン型イヤホン。 An open-type earphone having an earphone body with at least a built-in speaker and an acoustic duct extending obliquely from the earphone body and inserted into an ear canal,
An open-type earphone, characterized in that the acoustic duct is formed with a first communication passage that connects the speaker to the ear canal of the ear, and a second communication passage that connects the atmosphere to the ear canal of the ear. 前記第２連通路は、前記音響ダクトの外周面に形成された溝によって構成されることを特徴とする請求項１に記載のオープン型イヤホン。 The open-type earphone according to claim 1, characterized in that the second communication passage is formed by a groove formed on the outer circumferential surface of the acoustic duct. 前記音響ダクトに、一端が耳のトラガスが当接し、他端が耳甲介の内壁に当接するイヤーリングを取り付けたことを特徴とする請求項１または２に記載のオープン型イヤホン。 The open-type earphone according to claim 1 or 2, characterized in that an ear ring is attached to the acoustic duct, one end of which contacts the tragus of the ear and the other end of which contacts the inner wall of the concha. 前記イヤーリングは、２つのリングを連結一体化して構成されていることを特徴とする請求項３に記載のオープン型イヤホン。 The open-type earphone according to claim 3, characterized in that the earring is constructed by connecting two rings together. 前記音響ダクトの前記イヤホン本体に対する傾斜角は、６０°±１０°に設定されていることを特徴とする請求項１または２に記載のオープン型イヤホン。 The open-type earphone according to claim 1 or 2, characterized in that the inclination angle of the acoustic duct with respect to the earphone body is set to 60°±10°.
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