WO2008004274A1 - Voice transmission device - Google Patents

Voice transmission device Download PDF

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Publication number
WO2008004274A1
WO2008004274A1 PCT/JP2006/313255 JP2006313255W WO2008004274A1 WO 2008004274 A1 WO2008004274 A1 WO 2008004274A1 JP 2006313255 W JP2006313255 W JP 2006313255W WO 2008004274 A1 WO2008004274 A1 WO 2008004274A1
Authority
WO
WIPO (PCT)
Prior art keywords
user
vibration
head
main body
transmission device
Prior art date
Application number
PCT/JP2006/313255
Other languages
French (fr)
Japanese (ja)
Inventor
Motoaki Suzukawa
Original Assignee
Frey Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Frey Co., Ltd. filed Critical Frey Co., Ltd.
Priority to PCT/JP2006/313255 priority Critical patent/WO2008004274A1/en
Priority to JP2008523556A priority patent/JPWO2008004274A1/en
Publication of WO2008004274A1 publication Critical patent/WO2008004274A1/en

Links

Classifications

    • 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
    • H04R1/1066—Constructional aspects of the interconnection between earpiece and earpiece support
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C11/00—Non-optical adjuncts; Attachment thereof
    • G02C11/06—Hearing aids
    • 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
    • H04R2460/13—Hearing devices using bone conduction transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/033—Headphones for stereophonic communication
    • H04R5/0335—Earpiece support, e.g. headbands or neckrests

Definitions

  • the present invention relates to an audio transmission device for transmitting audio to a user.
  • Patent Document 1 Japanese Patent Laid-Open No. 2001-258095
  • an audio transmission device such as a headphone
  • the vibrating part is in close contact with the user's body, the vibration is not transmitted well to the user's bone, and the sound quality is deteriorated.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a technique for improving the feeling of use or transmission efficiency of an audio transmission device.
  • the audio transmission device includes a main body including a vibration unit that converts an electric signal for generating sound into vibration, a mounting unit for mounting the main body on a user's head, the mounting unit, and the main body.
  • a pivotal joint, The joint portion includes an urging mechanism that urges the main body in a direction of pressing the vibrating portion against the user's head when the main body is mounted on the user's head.
  • the main body is pivotally supported with respect to the mounting portion, the contact angle between the vibration portion and the user's head can be appropriately adjusted. Further, since the vibrating portion is pressed against the user's head by the urging mechanism, the adhesion can be improved and an appropriate contact state can be maintained for a long time. Thereby, vibration transmission efficiency can be improved, and sound quality can be improved. Moreover, a user's wearing feeling can be improved.
  • the mounting portion may be an arm biased so as to sandwich the user's head.
  • the arm may have a structure that holds the top of the head, a structure that holds the back of the head, or a structure that holds the face portion like glasses.
  • the arm may include an ear hook for hooking the arm on the user's ear.
  • the surface of the vibration unit that contacts the user's head may be a convex surface having a high center. Thereby, the adhesiveness of a vibration part and a user's head can be improved more.
  • the surface of the vibration unit that comes into contact with the user's head may be provided with a force for attaching a cover or a coating.
  • the cover or coating may have elasticity. As a result, the user's wearing feeling can be further improved.
  • the surface of the cover or coating may be a convex surface having a high center.
  • the vibrating section may include a giant magnetostrictive element.
  • FIG. 1 is a diagram showing a configuration example of a headphone according to an embodiment.
  • FIG. 2 is a diagram showing another configuration example of the headphones according to the embodiment.
  • FIG. 3 is a diagram showing another configuration example of the headphones according to the embodiment.
  • FIG. 4 is a diagram illustrating a configuration example of a vibration unit.
  • the bone conduction type headphone makes a vibration generating device that generates vibration according to an audio signal abut on the vicinity of the user's ear, transmits the vibration to the user's skull, etc., and perceives the user as sound.
  • the transmission efficiency and the feeling of wearing are greatly influenced by the contact state between the vibration transmission surface and the user's head. Since the shape of the head varies from person to person, there is a case where the vibration transmission surface cannot be brought into good contact with the head with the same structure as that of a conventional headphone. If a good contact state cannot be maintained, there is a risk that the sound quality will deteriorate without the vibration being transmitted to the user's skull or the like, or that the user may feel uncomfortable wearing.
  • the present inventor proposes a technique for improving the transmission efficiency of a sound transmission device such as a headphone, in particular, a bone-conduction type headphone, and a user's wearing feeling in the present embodiment that meets such a demand.
  • FIG. 1 shows a configuration example of a headphone as an example of a sound transmission device according to an embodiment.
  • the headphone 50 is an example of a vibration unit 10 that converts an electrical signal for generating sound into vibration, a main body 20 that holds the vibration unit 10, and a mounting unit for mounting the main body 20 on a user's head.
  • An arm 30 and a joint 40 that pivotally supports the arm 30 and the main body 20 are provided.
  • the arm 30 is elastic and biased to pinch the user's head Is done.
  • the joint unit 40 includes a coil panel that is an example of an urging mechanism that urges the main body 20 in a direction in which the vibration unit 10 is pressed against a site near the ear of the user's head.
  • the main body 20 and the vibration part 10 are urged in the direction of the arrow in the figure by the coil panel of the joint part 40.
  • the vibration unit 10 comes into contact with the vicinity of the user's ear.
  • the main body 20 has a circuit for inputting an electric signal to the vibration unit 10.
  • the vibration unit 10 When an electric signal is input from the circuit to the vibration unit 10, the vibration unit 10 generates vibration according to the electric signal.
  • the user perceives the vibration transmitted from the vibration unit 10 as a voice by bone conduction through the skull or the like.
  • the joint portion 40 is not provided, and the arm 30 and the main body 20 are directly connected.
  • the arm 30 is spread out and put on the head, and the arm 30 uses the force to return it to its original shape, and the vibration part 10 of the main body 20 is pressed against the user's ear. .
  • such a structure cannot maintain a good contact state, and there is a possibility that transmission efficiency and a user's wearing feeling may be reduced.
  • the headphone 50 of the present embodiment is provided with a joint portion 40 so that the main body 20 can be rotated in a direction substantially perpendicular to the contact portion of the user's head.
  • a coil panel is built in the joint portion 40 so that the vibrating portion 10 is pressed against the contact portion of the user's head.
  • the vibrating portion 10 can be appropriately pressed against the contact portion of the head by the biasing force of the coil panel that is generated only by the elastic force of the arm 30, so that the vibrating portion 10 can be brought into close contact with the contact portion.
  • a good contact state can be maintained, and vibration transmission efficiency can be improved.
  • the main body 20 is rotatable about the joint portion 40, the contact angle between the contact surface of the vibration portion 10 and the surface of the contact portion of the user's body can be adjusted. Can be improved.
  • the same headphone 50 that is, the headphone 50 having the same length from the joint section 40 to the vibration section 10 is worn in a good contact state regardless of whether it is an adult or a child. You can do what you can.
  • the joint portion 40 may be configured by a hinge, a hinge, a hinge, or the like.
  • the urging mechanism may consist of panel mechanisms such as plate panel, dish panel, coil panel and torsion panel, and elastic bodies such as rubber.
  • the surface of the vibration unit 10 that contacts the user's body may be a curved surface that matches the shape of the contact portion of the user's body.
  • the surface of the vibration unit 10 may be a convex surface that is high near the center and low near the periphery. As a result, when the vibration unit 10 is pressed near the user's ear, the surface of the vibration unit 10 is easily adhered to the skin.
  • the area of the contact surface between the surface of the vibration part 10 and the user's body is increased, so that the vibration of the vibration part 10 can be transmitted efficiently and the sound quality can be improved.
  • the user's feeling of use can be improved, and discomfort can be reduced even when the headphones 50 are worn for a long time.
  • a cover may be affixed to the surface of the vibration unit 10 that contacts the user's body. Further, a film may be provided on the surface of the vibration part 10.
  • the cover or the coating is preferably made of an elastic material. In this way, by providing an elastic cover or film, when the vibrating unit 10 is brought into contact with the user's skin, the cover or film is deformed in accordance with the shape of the part of the user's body to be contacted. To do. As a result, the area of the contact surface between the cover or the coating and the user's body increases, so that the vibration of the vibration unit 10 can be transmitted efficiently and the sound quality can be improved. In addition, the user's feeling of use can be improved.
  • the cover or coating may be made of an elastic material such as rubber or resin, and a bag made of a deformable soft material such as rubber or resin may contain gas, liquid, It may be filled with gel.
  • the cover may be attached to the surface of the vibration part 10 with an adhesive or the like.
  • the coating film may be formed by coating the surface of the vibration part 10 with a resin or the like.
  • the cover or the coating preferably has an elasticity and a thickness that do not hinder the transmission of sound from the surface of the vibration unit 10 to the outside, for example, the user's skin.
  • a giant magnetostrictive element having a large generated stress as the vibration converting element, even if an elastic cover or film is provided, sound can be transmitted efficiently.
  • the cover may be affixed with an adhesive having an adhesive strength that can be easily peeled off, sticky silicone rubber, or the like.
  • the cover or the film may be formed of adhesive silicon rubber or the like.
  • the cover may be replaceable each time the headphones are used.
  • metal allergy may cause direct contact with the skin. Even a user who has a situation that cannot be used can use the headphones 50 by providing a cover or a coating made of silicon rubber or the like on the surface of the vibration unit 10.
  • the vibration unit 10 may be pivotally supported with respect to the main body 20 by a universal joint or the like. As a result, the angle of the vibration unit 10 can be finely adjusted so that better contact with the contact surface of the user's body can be obtained.
  • FIG. 2 shows another configuration example of the headphones according to the embodiment.
  • the headphone 50 shown in FIG. 2 is different in the shape of the arm 30 from the headphone 50 shown in FIG.
  • the arm 30 of the headphone 50 shown in FIG. 2 is provided on the user's head by a curved ear hook 34 for hanging on the user's ear and a holding part 32 biased to hold the user's back head.
  • Wear 20 Also in the headphone 50 in this figure, like the headphone 50 shown in FIG. 1, the main body 20 is pivotally supported at the joint portion 40 with respect to the arm 30 and is supported by the urging mechanism of the joint portion 40.
  • the vibration unit 10 is biased so as to be pressed near the user's ear. As a result, the vibration transmission efficiency and the user's feeling of use can be improved.
  • FIG. 3 shows another configuration example of the headphones according to the embodiment.
  • the headphone 50 shown in FIG. 3 is different in the shape of the arm 30 from the headphone 50 shown in FIG.
  • the arm 30 of the headphone 50 shown in FIG. 3 has a shape similar to that of eyeglasses, and has an ear hook 34 for hanging on the user's ear and a holding member biased to hold the user's face.
  • the main body 20 is attached to the user's head by the unit 32.
  • the main body 20 is pivotally supported at the joint portion 40 with respect to the arm 30 so as to be rotatable with respect to the arm 30, as with the headphone 50 shown in FIG.
  • the vibration unit 10 is biased so as to be pressed near the user's ear. As a result, the vibration transmission efficiency and the user experience can be improved.
  • the arm 30 of the headphone 50 may have a shape such as a hat or a hair band, or may be only an ear hook.
  • the mounting portion may be a clip or the like for attaching the main body 20 to a hat or a helmet.
  • two vibrating parts 10 may be provided to make contact with the vicinity of both ears, and V, near one of the ears. One may be provided to abut.
  • a speaker that transmits sound to the eardrum of the ear via air vibration may be provided in the same manner as a conventional headphone.
  • a speaker of a type that covers the ears it is possible to block ambient noise and give a deeper immersion feeling. The same sound may be given to the speaker and the vibration unit 10, or different sounds may be given.
  • FIG. 4 shows a configuration example of the vibration unit 10.
  • the vibration unit 10 of the present embodiment mainly includes a giant magnetostrictive element 1, a bias magnet 2 (a bias upper magnet 2a and a bias lower magnet 2b), a bobbin 3, a coil 4, lead wires 5a and 5b, a vibration Includes rod 6, housing 8, and elastic member (string striation) 9.
  • the giant magnetostrictive element 1 is used as a vibration converting element for converting a signal obtained by converting sound into vibration, and has a substantially cylindrical outer shape.
  • the upper surface is a bias upper magnet 2a and a bottom surface. Are provided with biasing lower magnets 2b, respectively.
  • the giant magnetostrictive element 1 is housed inside the housing 8 in a state of being sandwiched between the bias upper magnet 2a and the bias lower magnet 2b, and is composed of the bias upper magnet 2a and the bias lower magnet 2b. It is set so that the magnetic field is constantly received as a bias magnetic field (the bias magnetic field constantly penetrates the giant magnetostrictive element 1).
  • the giant magnetostrictive element 1 when the housing 8 is connected to the main body 20 by the screw portion 81, the bottom surface is supported by the protrusions 22 of the main body 20, and the vibration rod 6 is elastic on the upper surface of the elastic member 9. It is set so that the so-called pre-stress is constantly applied by being pressed against the force.
  • the giant magnetostrictive element 1 receives a variable magnetic field from the coil 4 disposed in the surroundings in a state where the bias magnetic field and the pre-stress are constantly applied as described above, and thus, against the input electric signal. Responsive vibration is generated.
  • the coil 4 is formed by winding a conductor wire around a central axis of a bobbin 3 made of a material such as a glass-based polycarbonate, for example.
  • the coil 4 When an electrical signal is input to the conductor wire via the lead wiring, the coil 4 generates a magnetic field correspondingly.
  • the variable magnetic field generated by the four forces of the coil penetrates the giant magnetostrictive element 1, the giant magnetostrictive element 1 expands and contracts according to the strength of the variable magnetic field, and this is output as vibration.
  • One end of the vibrating rod 6 is mechanically connected to the giant magnetostrictive element 1 via the bias upper magnet 2a, and transmits vibration output from the giant magnetostrictive element 1 from the other end to the outside.
  • the vibration rod 6 is provided with a flange portion 61.
  • the flange portion 61 receives a biasing force from the elastic member 9 and is pressed against the biasing upper magnet 2a.
  • the pressing force is applied to the giant magnetostrictive element 1 via the bias upper magnet 2a.
  • the flange 61 and the elastic member 9 prevent the entire vibrating rod 6 from falling out of the housing 8.
  • the winging 8 is configured so that the giant magnetostrictive element 1, the upper biasing magnet 2a, the lower biasing magnet 2b, the bobbin 3, the coil 4, the vibrating rod 6, and the elastic member 9 are in a predetermined state. It is a so-called container (or body) that is housed in an assembled state. It is desirable that the housing 8 has a magnetic force so as not to leak the magnetic field inside the housing 8 and to generate the magnetic field inside the housing more effectively.
  • the nosing 8 has a threaded portion 81 for connecting to the main body 20.
  • the vibration part 10 is attached to the main body 20 by screwing the screw part 81 of the nosing 8 and the screw part 21 of the main body 20 together.
  • the vibration unit 10 and the main body 20 may be coupled by other screw mechanisms, welding, force squeezing, resin hardening, or the like.
  • the surface of the housing 8 on the main body 20 side is open, and when the vibrating section 10 is attached to the main body 20, the biasing lower magnet 2b directly contacts the main body 20. At this time, the protrusion 22 is provided at a position of the main body 20 where the lower biasing magnet 2b abuts.
  • the giant magnetostrictive element 1 is pressed from the protrusion 22 via the lower biasing magnet 2b. Then, a predetermined prestress is applied to the giant magnetostrictive element 1. Thereby, the conversion efficiency between an electric signal and vibration can be improved.
  • the lead wires 5a and 5b are connected to the circuit 29 of the main body 20, and an electric signal input from the circuit 29 is transmitted to the coil 4.
  • the end of the giant magnetostrictive element 1 opposite to the output end that transmits vibration to the user (hereinafter referred to as “fixed end”) is supported and fixed by the main body 20.
  • the vibration on the fixed end side of the giant magnetostrictive element 1 can be suppressed, so that the vibration of the giant magnetostrictive element 1 can be transmitted to the outside efficiently with an output end force. Therefore, good acoustic characteristics can be realized in a wide range of frequencies.
  • the function of supporting the fixed end and the pre-stress on the giant magnetostrictive element Is applied to the main body 20 including a circuit for inputting an electric signal that is not input by the vibration unit 10, so that it is not necessary to provide a member having a large inertial mass in the vibration unit 10 and the giant magnetostriction. Since one of the members that hold the element 1 can be omitted, the vibration unit 10 can be made small-sized and light-weighted, and thus the entire headphone 50 can be downsized and light-weighted. It is desirable that the protrusion 22 has sufficient hardness to suppress vibration on the fixed end side of the giant magnetostrictive element 1.
  • the present invention can be used for a voice transmission device that transmits voice to a user.

Abstract

A headphone (50) has vibration sections (10) for converting an electric signal for generating a voice into vibration, bodies (20) for holding the vibration sections (10), an arm (30) for installing the bodies (20) on the head of the user, and joint sections (40) for rotatably supporting the arm (30) and the bodies (20). The joint sections (40) include urging mechanisms for urging, when the bodies (20) are installed on the user's head, the bodies (20) in the direction where the vibration sections (10) are pressed to the head. The vibration sections (10) are pressed against portions near the user's ears not only by elastic force of the arm (30) but also by the urging mechanisms of the joint sections (40).

Description

明 細 書  Specification
音声伝達装置  Audio transmission device
技術分野  Technical field
[0001] 本発明は、音声をユーザへ伝達するための音声伝達装置に関する。  [0001] The present invention relates to an audio transmission device for transmitting audio to a user.
背景技術  Background art
[0002] ある種の磁性材料は、外部の磁界の変化に応じて歪を生じる。また、このような磁性 材料に応力を加えて変形させると、その応力に応じて磁気特性が変化する。これらの 現象は「磁歪」と呼ばれる。近年、従来知られていた磁歪素子の変位量に比して 50 〜 100倍の変位を示す材料が発見されており、それらは「超磁歪素子」と呼ばれてい る。  [0002] Certain magnetic materials are distorted in response to changes in an external magnetic field. In addition, when such a magnetic material is deformed by applying stress, the magnetic characteristics change according to the stress. These phenomena are called “magnetostriction”. In recent years, materials having a displacement of 50 to 100 times the conventionally known displacement amount of the magnetostrictive element have been discovered, and they are called “super magnetostrictive elements”.
[0003] 磁歪素子に交流磁界を印加すると、その交流磁界の周波数に等しい周波数の振 動を発生させることができる。このような現象を利用して、例えば、超磁歪素子を骨伝 導式ヘッドフォンや聴覚補助器具などに応用することが期待されている (例えば、特 許文献 1参照)。  [0003] When an AC magnetic field is applied to the magnetostrictive element, vibration having a frequency equal to the frequency of the AC magnetic field can be generated. Using such a phenomenon, for example, it is expected that a giant magnetostrictive element is applied to a bone-conduction headphone, a hearing aid, or the like (for example, see Patent Document 1).
特許文献 1：特開 2001— 258095号公報  Patent Document 1: Japanese Patent Laid-Open No. 2001-258095
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0004] ヘッドフォンなどの音声伝達装置においては、振動をユーザの鼓膜や頭蓋骨等に 効率良く伝達させることが重要である。とくに、骨伝導式のヘッドフォンにおいては、 振動する部分がユーザの体に密着するようにしなければ、振動がユーザの骨にうまく 伝わらず、音質が劣化してしまう。 In an audio transmission device such as a headphone, it is important to efficiently transmit vibration to a user's eardrum, skull, or the like. In particular, in a bone conduction type headphone, unless the vibrating part is in close contact with the user's body, the vibration is not transmitted well to the user's bone, and the sound quality is deteriorated.
[0005] 本発明はこうした状況に鑑みてなされたものであり、その目的は、音声伝達装置の 使用感又は伝達効率を向上させる技術を提供することにある。 [0005] The present invention has been made in view of such circumstances, and an object of the present invention is to provide a technique for improving the feeling of use or transmission efficiency of an audio transmission device.
課題を解決するための手段  Means for solving the problem
[0006] 本発明のある態様は、音声伝達装置に関する。この音声伝達装置は、音声を発生 させるための電気信号を振動に変換する振動部を含む本体と、前記本体をユーザの 頭部に装着するための装着部と、前記装着部と前記本体とを軸支する関節部と、を 備え、前記関節部は、前記本体を前記ユーザの頭部に装着したときに、前記振動部 を前記ユーザの頭部へ押し当てる方向へ前記本体を付勢する付勢機構を含むこと を特徴とする。 [0006] One embodiment of the present invention relates to an audio transmission device. The audio transmission device includes a main body including a vibration unit that converts an electric signal for generating sound into vibration, a mounting unit for mounting the main body on a user's head, the mounting unit, and the main body. A pivotal joint, The joint portion includes an urging mechanism that urges the main body in a direction of pressing the vibrating portion against the user's head when the main body is mounted on the user's head. To do.
[0007] 本体が装着部に対して回動可能に軸支されているので、振動部とユーザの頭部と の接触角を適切に調節可能である。また、付勢機構により振動部がユーザの頭部に 押し当てられるので、密着性を向上させることができ、また、適切な接触状態を長時 間維持することができる。これにより、振動の伝達効率を向上させることができ、音質 を向上させることができる。また、ユーザの装着感を向上させることができる。  [0007] Since the main body is pivotally supported with respect to the mounting portion, the contact angle between the vibration portion and the user's head can be appropriately adjusted. Further, since the vibrating portion is pressed against the user's head by the urging mechanism, the adhesion can be improved and an appropriate contact state can be maintained for a long time. Thereby, vibration transmission efficiency can be improved, and sound quality can be improved. Moreover, a user's wearing feeling can be improved.
[0008] 前記装着部は、前記ユーザの頭部を挟持するように付勢されたアームであってもよ い。アームは、頭頂部を挟持する構造であってもよいし、後頭部を挟持する構造であ つてもよいし、眼鏡のように顔面部を挟持する構造であってもよい。前記アームは、当 該アームを前記ユーザの耳に掛けるための耳掛け部を有してもよい。  [0008] The mounting portion may be an arm biased so as to sandwich the user's head. The arm may have a structure that holds the top of the head, a structure that holds the back of the head, or a structure that holds the face portion like glasses. The arm may include an ear hook for hooking the arm on the user's ear.
[0009] 前記振動部の、前記ユーザの頭部に当接する面は、中心付近が高い凸面であつ てもよい。これにより、振動部とユーザの頭部との密着性をより向上させることができる 。前記振動部の、前記ユーザの頭部に当接する面には、カバーが貼付される力、又 は、被膜が設けられてもよい。前記カバー又は被膜は、弾性を有してもよい。これによ り、ユーザの装着感をより向上させることができる。前記カバー又は被膜の表面は、 中心付近が高い凸面であってもよい。  [0009] The surface of the vibration unit that contacts the user's head may be a convex surface having a high center. Thereby, the adhesiveness of a vibration part and a user's head can be improved more. The surface of the vibration unit that comes into contact with the user's head may be provided with a force for attaching a cover or a coating. The cover or coating may have elasticity. As a result, the user's wearing feeling can be further improved. The surface of the cover or coating may be a convex surface having a high center.
[0010] 前記振動部は、超磁歪素子を含んでもよい。 [0010] The vibrating section may include a giant magnetostrictive element.
[0011] なお、以上の構成要素の任意の組合せ、本発明の表現を方法、装置、システム、な どの間で変換したものもまた、本発明の態様として有効である。  [0011] It is to be noted that any combination of the above-described components and a conversion of the expression of the present invention between a method, an apparatus, a system, and the like are also effective as an aspect of the present invention.
発明の効果  The invention's effect
[0012] 本発明によれば、音声伝達装置の使用感又は伝達効率を向上させる技術を提供 することができる。  [0012] According to the present invention, it is possible to provide a technique for improving the feeling of use or transmission efficiency of a sound transmission device.
図面の簡単な説明  Brief Description of Drawings
[0013] [図 1]実施の形態に係るヘッドフォンの構成例を示す図である。  FIG. 1 is a diagram showing a configuration example of a headphone according to an embodiment.
[図 2]実施の形態に係るヘッドフォンの別の構成例を示す図である。  FIG. 2 is a diagram showing another configuration example of the headphones according to the embodiment.
[図 3]実施の形態に係るヘッドフォンの別の構成例を示す図である。 [図 4]振動部の構成例を示す図である。 FIG. 3 is a diagram showing another configuration example of the headphones according to the embodiment. FIG. 4 is a diagram illustrating a configuration example of a vibration unit.
符号の説明  Explanation of symbols
[0014] 1 超磁歪素子、 2 バイアス用磁石、 3 ボビン、 4 コイル、 5 リード配線、 6 振動 ロッド、 8 ハウジング、 9 弾性部材、 10 振動部、 20 本体、 21 ネジ部、 22 突起 、 29 回路、 30 アーム、 32 挟持部、 34 耳掛け部、 40 関節部、 50 ヘッドフォ ン、 81 ネジ部。  [0014] 1 Giant magnetostrictive element, 2 Bias magnet, 3 Bobbin, 4 Coil, 5 Lead wiring, 6 Vibration rod, 8 Housing, 9 Elastic member, 10 Vibration part, 20 Body, 21 Screw part, 22 Projection, 29 Circuit , 30 arms, 32 clamping parts, 34 ear hooks, 40 joints, 50 headphones, 81 threaded parts.
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0015] 骨伝導式のヘッドフォンは、音声信号に応じた振動を発生させる振動発生装置を ユーザの耳付近に当接させ、ユーザの頭蓋骨等に振動を伝達して、ユーザに音声と して知覚させる。このとき、振動の伝達面とユーザの頭部との接触状態により、伝達効 率や装着感が大きく左右される。頭部の形状は人によって様々であるから、従来のへ ッドフォンの構造と同じ構造では、振動の伝達面を頭部にうまく接触させられない場 合がある。良好な接触状態を維持できない場合は、ユーザの頭蓋骨等に振動がうま く伝わらずに音質が低下してしまったり、ユーザに不快な装着感を与えてしまったり する虞がある。また、骨伝導式の音声伝達装置を聴覚補助器などに応用する場合、 聴覚補助器を利用する高齢者や障害者は長時間ヘッドフォンを装着することになる ので、より装着感の良好で負担の小さい形状の装置を用意する必要がある。更に、 飲食店や娯楽施設などで、係員が顧客対応をしつつ、店内の事務連絡をヘッドフォ ンを通して受けるような利用シーンでは、顧客にとって目障りでない形状でありながら 、音声を効率的に伝達することが可能な装置を用意する必要がある。本発明者は、こ のような要請に応えるベぐ本実施の形態において、ヘッドフォン、特に骨伝導式の ヘッドフォンなどの音声伝達装置の伝達効率やユーザの装着感を向上させる技術を 提案する。 [0015] The bone conduction type headphone makes a vibration generating device that generates vibration according to an audio signal abut on the vicinity of the user's ear, transmits the vibration to the user's skull, etc., and perceives the user as sound. Let At this time, the transmission efficiency and the feeling of wearing are greatly influenced by the contact state between the vibration transmission surface and the user's head. Since the shape of the head varies from person to person, there is a case where the vibration transmission surface cannot be brought into good contact with the head with the same structure as that of a conventional headphone. If a good contact state cannot be maintained, there is a risk that the sound quality will deteriorate without the vibration being transmitted to the user's skull or the like, or that the user may feel uncomfortable wearing. In addition, when applying bone conduction type audio transmission devices to hearing aids, etc., elderly people and people with disabilities who use hearing aids wear headphones for a long time. It is necessary to prepare a device having a small shape. Furthermore, in restaurants and recreational facilities where staff members handle customers and receive office contact through the headphones, it is possible to efficiently transmit audio while maintaining a non-obtrusive shape for customers. It is necessary to prepare a device that can do this. The present inventor proposes a technique for improving the transmission efficiency of a sound transmission device such as a headphone, in particular, a bone-conduction type headphone, and a user's wearing feeling in the present embodiment that meets such a demand.
[0016] 図 1は、実施の形態に係る音声伝達装置の一例であるヘッドフォンの構成例を示す 。ヘッドフォン 50は、音声を発生させるための電気信号を振動に変換する振動部 10 と、振動部 10を保持する本体 20と、本体 20をユーザの頭部に装着するための装着 部の一例であるアーム 30と、アーム 30と本体 20とを回動可能に軸支する関節部 40 とを備える。アーム 30は、弾性を有しており、ユーザの頭頂部を挟持するように付勢 される。関節部 40は、振動部 10をユーザの頭部の耳付近の部位へ押し当てる方向 に本体 20を付勢する付勢機構の一例であるコイルパネを有する。本体 20及び振動 部 10は、関節部 40のコイルパネにより、図中矢印の方向へ付勢されている。 FIG. 1 shows a configuration example of a headphone as an example of a sound transmission device according to an embodiment. The headphone 50 is an example of a vibration unit 10 that converts an electrical signal for generating sound into vibration, a main body 20 that holds the vibration unit 10, and a mounting unit for mounting the main body 20 on a user's head. An arm 30 and a joint 40 that pivotally supports the arm 30 and the main body 20 are provided. The arm 30 is elastic and biased to pinch the user's head Is done. The joint unit 40 includes a coil panel that is an example of an urging mechanism that urges the main body 20 in a direction in which the vibration unit 10 is pressed against a site near the ear of the user's head. The main body 20 and the vibration part 10 are urged in the direction of the arrow in the figure by the coil panel of the joint part 40.
[0017] ユーザがヘッドフォン 50を頭部に装着したとき、振動部 10がユーザの耳付近に当 接する。本体 20は、振動部 10へ電気信号を入力する回路を有しており、この回路か ら振動部 10へ電気信号が入力されると、振動部 10が電気信号に応じた振動を発生 する。ユーザは、振動部 10から伝達される振動を頭蓋骨等を介した骨伝導により音 声として知覚する。 [0017] When the user wears the headphone 50 on the head, the vibration unit 10 comes into contact with the vicinity of the user's ear. The main body 20 has a circuit for inputting an electric signal to the vibration unit 10. When an electric signal is input from the circuit to the vibration unit 10, the vibration unit 10 generates vibration according to the electric signal. The user perceives the vibration transmitted from the vibration unit 10 as a voice by bone conduction through the skull or the like.
[0018] 一般的なヘッドフォンでは、関節部 40は設けられず、アーム 30と本体 20は直結さ れている。ヘッドフォンを装着するときには、アーム 30を広げて頭に被り、アーム 30が 元の形状に戻ろうとする力を利用して、本体 20の振動部 10をユーザの耳付近に押し 当てる構造となっている。し力しながら、上述したように、このような構造では良好な接 触状態を維持できず、伝達効率やユーザの装着感の低下を招く虞がある。  [0018] In a general headphone, the joint portion 40 is not provided, and the arm 30 and the main body 20 are directly connected. When wearing headphones, the arm 30 is spread out and put on the head, and the arm 30 uses the force to return it to its original shape, and the vibration part 10 of the main body 20 is pressed against the user's ear. . However, as described above, such a structure cannot maintain a good contact state, and there is a possibility that transmission efficiency and a user's wearing feeling may be reduced.
[0019] このような課題を解決するために、本実施の形態のヘッドフォン 50は、関節部 40を 設けて本体 20をユーザの頭部の当接部位に対して略垂直な方向に回動可能とする とともに、関節部 40にコイルパネを内蔵して、振動部 10をユーザの頭部の当接部位 に押し当てるようにする。これにより、アーム 30の弾性力だけでなぐコイルパネの付 勢力によっても、振動部 10が頭部の当接部位に適切に押し当てられるので、振動部 10を当接部位により密着させることができる。これにより、良好な接触状態を維持する ことができ、振動の伝達効率を向上させることができる。また、本体 20が関節部 40を 軸に回動可能であるから、振動部 10の当接面とユーザの体の当接部位の表面との 接触角を調整することができ、ユーザの装着感を向上させることができる。本発明者 らの実験により、成人であっても子供であっても、同一のヘッドフォン 50、すなわち関 節部 40から振動部 10までの長さが同じヘッドフォン 50を、良好な接触状態にて装着 することができることが分力つて 、る。  In order to solve such a problem, the headphone 50 of the present embodiment is provided with a joint portion 40 so that the main body 20 can be rotated in a direction substantially perpendicular to the contact portion of the user's head. In addition, a coil panel is built in the joint portion 40 so that the vibrating portion 10 is pressed against the contact portion of the user's head. As a result, the vibrating portion 10 can be appropriately pressed against the contact portion of the head by the biasing force of the coil panel that is generated only by the elastic force of the arm 30, so that the vibrating portion 10 can be brought into close contact with the contact portion. As a result, a good contact state can be maintained, and vibration transmission efficiency can be improved. In addition, since the main body 20 is rotatable about the joint portion 40, the contact angle between the contact surface of the vibration portion 10 and the surface of the contact portion of the user's body can be adjusted. Can be improved. According to the experiments of the present inventors, the same headphone 50, that is, the headphone 50 having the same length from the joint section 40 to the vibration section 10 is worn in a good contact state regardless of whether it is an adult or a child. You can do what you can.
[0020] 関節部 40は、蝶番、丁番、ヒンジなどにより構成されてもよい。付勢機構は、板パネ 、皿パネ、コイルパネ、ねじりパネなどのパネ機構、ゴムなどの弾性体などにより構成 されてちょい。 [0021] 振動部 10の、ユーザの体に当接する面を、ユーザの体の当接部位の形状に合わ せて曲面としてもよい。例えば、振動部 10の表面を、中心付近が高く周縁付近が低 い凸面としてもよい。これにより、ユーザの耳付近に振動部 10を押し当てたときに、振 動部 10の表面が皮膚に密着しやすくなる。これにより、振動部 10の表面とユーザの 体との接触面の面積が大きくなるので、振動部 10の振動を効率良く伝達させることが でき、音質を向上させることができる。また、ユーザの使用感を向上させることができ、 長時間ヘッドフォン 50を装着する場合であっても、不快感を軽減することができる。 [0020] The joint portion 40 may be configured by a hinge, a hinge, a hinge, or the like. The urging mechanism may consist of panel mechanisms such as plate panel, dish panel, coil panel and torsion panel, and elastic bodies such as rubber. The surface of the vibration unit 10 that contacts the user's body may be a curved surface that matches the shape of the contact portion of the user's body. For example, the surface of the vibration unit 10 may be a convex surface that is high near the center and low near the periphery. As a result, when the vibration unit 10 is pressed near the user's ear, the surface of the vibration unit 10 is easily adhered to the skin. As a result, the area of the contact surface between the surface of the vibration part 10 and the user's body is increased, so that the vibration of the vibration part 10 can be transmitted efficiently and the sound quality can be improved. In addition, the user's feeling of use can be improved, and discomfort can be reduced even when the headphones 50 are worn for a long time.
[0022] 振動部 10の、ユーザの体に当接する面には、カバーが貼付されてもよい。また、振 動部 10の表面に、被膜が設けられてもよい。カバー又は被膜は、弾性を有する素材 により構成されるのが好ましい。このように、弾性を有するカバー又は被膜を設けるこ とで、振動部 10がユーザの皮膚に当接されたときに、当接されるユーザの体の部位 の形状に合わせてカバー又は被膜が変形する。これにより、カバー又は被膜とユー ザの体との接触面の面積が大きくなるので、振動部 10の振動を効率良く伝達させる ことができ、音質を向上させることができる。また、ユーザの使用感を向上させることが できる。 [0022] A cover may be affixed to the surface of the vibration unit 10 that contacts the user's body. Further, a film may be provided on the surface of the vibration part 10. The cover or the coating is preferably made of an elastic material. In this way, by providing an elastic cover or film, when the vibrating unit 10 is brought into contact with the user's skin, the cover or film is deformed in accordance with the shape of the part of the user's body to be contacted. To do. As a result, the area of the contact surface between the cover or the coating and the user's body increases, so that the vibration of the vibration unit 10 can be transmitted efficiently and the sound quality can be improved. In addition, the user's feeling of use can be improved.
[0023] カバー又は被膜は、ゴムゃ榭脂などの弾性を有する材料カゝら構成されてもょ 、し、 ゴムゃ榭脂などの変形可能な柔らかい素材により構成された袋に気体、液体、ゲル などを満たしたものであってもよい。カバーは、接着剤などにより振動部 10の表面に 貼付されてもよい。被膜は、榭脂などを振動部 10の表面にコーティングすることにより 形成されてもよい。カバー又は被膜は、振動部 10の表面から外部、例えばユーザの 皮膚への音声の伝達が妨げられない程度の弾性、厚みを有することが好ましい。な お、振動変換素子として、発生応力の大きい超磁歪素子を利用することにより、弾性 を有するカバー又は被膜を設けても、効率良く音声を伝達することができる。  [0023] The cover or coating may be made of an elastic material such as rubber or resin, and a bag made of a deformable soft material such as rubber or resin may contain gas, liquid, It may be filled with gel. The cover may be attached to the surface of the vibration part 10 with an adhesive or the like. The coating film may be formed by coating the surface of the vibration part 10 with a resin or the like. The cover or the coating preferably has an elasticity and a thickness that do not hinder the transmission of sound from the surface of the vibration unit 10 to the outside, for example, the user's skin. In addition, by using a giant magnetostrictive element having a large generated stress as the vibration converting element, even if an elastic cover or film is provided, sound can be transmitted efficiently.
[0024] カバーは、容易にはがせる程度の接着力の接着剤や粘着性シリコンゴム等により 貼付されてもよい。また、カバー又は被膜を粘着性シリコンゴム等により形成してもよ い。例えば、音楽 CDの販売店などにおいて視聴用にヘッドフォンを設置するなど、 不特定のユーザがヘッドフォン 50を利用する場合に、利用のたびにカバーを交換可 能としてもよい。また、金属アレルギーなどにより皮膚に直接金属を接触させることが できないなどの事情を有するユーザであっても、シリコンゴムゃ榭脂などにより構成さ れたカバー又は被膜を振動部 10の表面に設けることにより、ヘッドフォン 50を利用す ることが可能となる。 [0024] The cover may be affixed with an adhesive having an adhesive strength that can be easily peeled off, sticky silicone rubber, or the like. Further, the cover or the film may be formed of adhesive silicon rubber or the like. For example, when an unspecified user uses the headphones 50 such as installing headphones for viewing at a music CD store or the like, the cover may be replaceable each time the headphones are used. In addition, metal allergy may cause direct contact with the skin. Even a user who has a situation that cannot be used can use the headphones 50 by providing a cover or a coating made of silicon rubber or the like on the surface of the vibration unit 10.
[0025] 振動部 10は、ユニバーサルジョイントなどにより、本体 20に対して回動可能に軸支 されてもよい。これにより、ユーザの体の当接面に対してより良好な接触が得られるよ うに振動部 10の角度を微調整することができる。  [0025] The vibration unit 10 may be pivotally supported with respect to the main body 20 by a universal joint or the like. As a result, the angle of the vibration unit 10 can be finely adjusted so that better contact with the contact surface of the user's body can be obtained.
[0026] 図 2は、実施の形態に係るヘッドフォンの別の構成例を示す。図 2に示したヘッドフ オン 50は、図 1に示したヘッドフォン 50とはアーム 30の形状が異なる。図 2に示した ヘッドフォン 50のアーム 30は、ユーザの耳に掛けるための湾曲した耳掛け部 34と、 ユーザの後頭部を挟持するように付勢された挟持部 32により、ユーザの頭部に本体 20を装着する。本図のヘッドフォン 50においても、図 1に示したヘッドフォン 50と同 様に、本体 20はアーム 30に対して関節部 40において回動可能に軸支されており、 関節部 40の付勢機構により、振動部 10がユーザの耳付近に押し当てられるように付 勢される。これにより、振動の伝達効率及びユーザの使用感を向上させることができ る。  FIG. 2 shows another configuration example of the headphones according to the embodiment. The headphone 50 shown in FIG. 2 is different in the shape of the arm 30 from the headphone 50 shown in FIG. The arm 30 of the headphone 50 shown in FIG. 2 is provided on the user's head by a curved ear hook 34 for hanging on the user's ear and a holding part 32 biased to hold the user's back head. Wear 20 Also in the headphone 50 in this figure, like the headphone 50 shown in FIG. 1, the main body 20 is pivotally supported at the joint portion 40 with respect to the arm 30 and is supported by the urging mechanism of the joint portion 40. The vibration unit 10 is biased so as to be pressed near the user's ear. As a result, the vibration transmission efficiency and the user's feeling of use can be improved.
[0027] 図 3は、実施の形態に係るヘッドフォンの別の構成例を示す。図 3に示したヘッドフ オン 50は、図 1に示したヘッドフォン 50とはアーム 30の形状が異なる。図 3に示した ヘッドフォン 50のアーム 30は、眼鏡と同様の形状を有しており、ユーザの耳に掛ける ための耳掛け部 34と、ユーザの顔面部を挟持するように付勢された挟持部 32により 、ユーザの頭部に本体 20を装着する。本図のヘッドフォン 50においても、図 1に示し たヘッドフォン 50と同様に、本体 20はアーム 30に対して関節部 40において回動可 能に軸支されており、関節部 40の付勢機構により、振動部 10がユーザの耳付近に 押し当てられるように付勢される。これにより、振動の伝達効率及びユーザの使用感 を向上させることができる。  FIG. 3 shows another configuration example of the headphones according to the embodiment. The headphone 50 shown in FIG. 3 is different in the shape of the arm 30 from the headphone 50 shown in FIG. The arm 30 of the headphone 50 shown in FIG. 3 has a shape similar to that of eyeglasses, and has an ear hook 34 for hanging on the user's ear and a holding member biased to hold the user's face. The main body 20 is attached to the user's head by the unit 32. In the headphone 50 shown in the figure as well, the main body 20 is pivotally supported at the joint portion 40 with respect to the arm 30 so as to be rotatable with respect to the arm 30, as with the headphone 50 shown in FIG. The vibration unit 10 is biased so as to be pressed near the user's ear. As a result, the vibration transmission efficiency and the user experience can be improved.
[0028] ヘッドフォン 50のアーム 30は、帽子やヘアバンドなどの形状を有していてもよいし、 耳掛け部のみであってもよい。また、装着部は、アーム 30以外にも、帽子やヘルメッ トなどに本体 20を取り付けるためのクリップなどであってもよい。また、振動部 10は、 両耳の近傍に当接させるために 2個設けられてもよ 、し、 V、ずれか一方の耳の近傍 に当接させるために 1個設けられてもよ 、。 [0028] The arm 30 of the headphone 50 may have a shape such as a hat or a hair band, or may be only an ear hook. In addition to the arm 30, the mounting portion may be a clip or the like for attaching the main body 20 to a hat or a helmet. In addition, two vibrating parts 10 may be provided to make contact with the vicinity of both ears, and V, near one of the ears. One may be provided to abut.
[0029] 骨伝導により音声を伝達する振動部 10の他に、従来のヘッドフォンと同様、空気振 動を介して耳の鼓膜へ音声を伝達するスピーカが設けられてもよい。この場合、耳を 覆うタイプの形状のスピーカを設けることにより、周囲の騒音を遮断し、より深い没入 感を与えることができる。スピーカと振動部 10には、同じ音声が与えられてもよいし、 異なる音声が与えられもよ 、。  [0029] In addition to the vibration unit 10 that transmits sound by bone conduction, a speaker that transmits sound to the eardrum of the ear via air vibration may be provided in the same manner as a conventional headphone. In this case, by providing a speaker of a type that covers the ears, it is possible to block ambient noise and give a deeper immersion feeling. The same sound may be given to the speaker and the vibration unit 10, or different sounds may be given.
[0030] 図 4は、振動部 10の構成例を示す。本実施の形態の振動部 10は、主に、超磁歪 素子 1、バイアス用磁石 2 (バイアス用上位磁石 2a及びバイアス用下位磁石 2b)、ボ ビン 3、コイル 4、リード配線 5a及び 5b、振動ロッド 6、ハウジング 8、及び弾性部材（弦 卷発条） 9を含む。  FIG. 4 shows a configuration example of the vibration unit 10. The vibration unit 10 of the present embodiment mainly includes a giant magnetostrictive element 1, a bias magnet 2 (a bias upper magnet 2a and a bias lower magnet 2b), a bobbin 3, a coil 4, lead wires 5a and 5b, a vibration Includes rod 6, housing 8, and elastic member (string striation) 9.
[0031] 超磁歪素子 1は、音声を変換してなる信号を振動に変換する振動変換素子として 用いられるもので、概ね円柱状の外形を有し、上面にはバイアス用上位磁石 2a、底 面にはバイアス用下位磁石 2bが、それぞれ配置される。この超磁歪素子 1は、バイァ ス用上位磁石 2aとバイアス用下位磁石 2bとの間に挟持された状態でハウジング 8の 内部に収容されて、バイアス用上位磁石 2aとバイアス用下位磁石 2bとによる磁界を バイアス磁界として恒常的に受ける（バイアス磁界が超磁歪素子 1を恒常的に貫通す る）ように設定されている。またそれと共に、この超磁歪素子 1は、ハウジング 8がネジ 部 81により本体 20に連結されたときに、底面を本体 20の突起 22によって支持され つつ、上面に振動ロッド 6が弾性部材 9の弾性力を受けて押し当てられることで、いわ ゆるプリストレスが恒常的に印加されるように設定されている。この超磁歪素子 1は、 上記のようにしてバイアス磁界とプリストレスとを恒常的に与えられた状態で、周囲に 配置されたコイル 4による可変磁界を受けることによって、入力された電気信号に対 応した振動を発生する。  [0031] The giant magnetostrictive element 1 is used as a vibration converting element for converting a signal obtained by converting sound into vibration, and has a substantially cylindrical outer shape. The upper surface is a bias upper magnet 2a and a bottom surface. Are provided with biasing lower magnets 2b, respectively. The giant magnetostrictive element 1 is housed inside the housing 8 in a state of being sandwiched between the bias upper magnet 2a and the bias lower magnet 2b, and is composed of the bias upper magnet 2a and the bias lower magnet 2b. It is set so that the magnetic field is constantly received as a bias magnetic field (the bias magnetic field constantly penetrates the giant magnetostrictive element 1). At the same time, in the giant magnetostrictive element 1, when the housing 8 is connected to the main body 20 by the screw portion 81, the bottom surface is supported by the protrusions 22 of the main body 20, and the vibration rod 6 is elastic on the upper surface of the elastic member 9. It is set so that the so-called pre-stress is constantly applied by being pressed against the force. The giant magnetostrictive element 1 receives a variable magnetic field from the coil 4 disposed in the surroundings in a state where the bias magnetic field and the pre-stress are constantly applied as described above, and thus, against the input electric signal. Responsive vibration is generated.
[0032] コイル 4は、例えばガラス基材ポリカーボネートのような材質からなるボビン 3の中心 胴を卷回軸心として、その周囲に導体線を卷回してなるものである。リード配線を介し て導体線に電気信号が入力されると、それに対応してコイル 4が磁界を発生する。こ のコイル 4力 発せられる可変磁界が超磁歪素子 1を貫くことで、その可変磁界の強 さに対応して超磁歪素子 1が伸縮し、それが振動として出力される。 [0033] 振動ロッド 6は、一端がバイアス用上位磁石 2aを介して超磁歪素子 1に機械的に接 続され、超磁歪素子 1から出力される振動を他端から外部へ伝達する。この振動ロッ ド 6にはフランジ部 61が設けられており、そのフランジ部 61で弾性部材 9による付勢 力を受けて、バイアス用上位磁石 2aに押し付けられる。その押圧力はバイアス用上 位磁石 2aを介して超磁歪素子 1に印加される。また、そのフランジ部 61及び弾性部 材 9によって、振動ロッド 6全体がハウジング 8の外側へと抜け落ちることを防いでいる [0032] The coil 4 is formed by winding a conductor wire around a central axis of a bobbin 3 made of a material such as a glass-based polycarbonate, for example. When an electrical signal is input to the conductor wire via the lead wiring, the coil 4 generates a magnetic field correspondingly. When the variable magnetic field generated by the four forces of the coil penetrates the giant magnetostrictive element 1, the giant magnetostrictive element 1 expands and contracts according to the strength of the variable magnetic field, and this is output as vibration. [0033] One end of the vibrating rod 6 is mechanically connected to the giant magnetostrictive element 1 via the bias upper magnet 2a, and transmits vibration output from the giant magnetostrictive element 1 from the other end to the outside. The vibration rod 6 is provided with a flange portion 61. The flange portion 61 receives a biasing force from the elastic member 9 and is pressed against the biasing upper magnet 2a. The pressing force is applied to the giant magnetostrictive element 1 via the bias upper magnet 2a. The flange 61 and the elastic member 9 prevent the entire vibrating rod 6 from falling out of the housing 8.
[0034] ノ、ウジング 8は、上記のような超磁歪素子 1、バイアス用上位磁石 2a、バイアス用下 位磁石 2b、ボビン 3、コイル 4、振動ロッド 6、弾性部材 9を、所定の状態に組み立てら れた状態で収容する、いわゆる容器 (又はボディ)である。ハウジング 8は、その内部 の磁界を外側に漏らさな 、ようにするため、及びその内部の磁界をより効果的に発生 させるために、磁性体力もなるものとすることが望ま 、。 [0034] The winging 8 is configured so that the giant magnetostrictive element 1, the upper biasing magnet 2a, the lower biasing magnet 2b, the bobbin 3, the coil 4, the vibrating rod 6, and the elastic member 9 are in a predetermined state. It is a so-called container (or body) that is housed in an assembled state. It is desirable that the housing 8 has a magnetic force so as not to leak the magnetic field inside the housing 8 and to generate the magnetic field inside the housing more effectively.
[0035] ノヽウジング 8は、本体 20と連結させるためのネジ部 81を有している。ノヽウジング 8の ネジ部 81と、本体 20のネジ部 21とを螺合させることにより、振動部 10が本体 20に取 り付けられる。振動部 10と本体 20とは、その他のネジ機構、溶接、力シメ、榭脂硬化 などにより連結されてもよい。ハウジング 8の本体 20側の面は開放されており、振動 部 10が本体 20に取り付けられると、バイアス用下位磁石 2bが直接本体 20に当接す る。このとき、本体 20の、バイアス用下位磁石 2bが当接する位置に突起 22が設けら れており、ネジを締めることにより、超磁歪素子 1がバイアス用下位磁石 2bを介して突 起 22から押圧され、超磁歪素子 1に所定のプリストレスが印加される。これにより、電 気信号と振動との間の変換効率を向上させることができる。また、リード配線 5a及び 5 bが本体 20の回路 29に接続され、回路 29から入力される電気信号がコイル 4へ伝達 される。  The nosing 8 has a threaded portion 81 for connecting to the main body 20. The vibration part 10 is attached to the main body 20 by screwing the screw part 81 of the nosing 8 and the screw part 21 of the main body 20 together. The vibration unit 10 and the main body 20 may be coupled by other screw mechanisms, welding, force squeezing, resin hardening, or the like. The surface of the housing 8 on the main body 20 side is open, and when the vibrating section 10 is attached to the main body 20, the biasing lower magnet 2b directly contacts the main body 20. At this time, the protrusion 22 is provided at a position of the main body 20 where the lower biasing magnet 2b abuts. By tightening the screw, the giant magnetostrictive element 1 is pressed from the protrusion 22 via the lower biasing magnet 2b. Then, a predetermined prestress is applied to the giant magnetostrictive element 1. Thereby, the conversion efficiency between an electric signal and vibration can be improved. In addition, the lead wires 5a and 5b are connected to the circuit 29 of the main body 20, and an electric signal input from the circuit 29 is transmitted to the coil 4.
[0036] 超磁歪素子 1の、ユーザへ振動を伝達する出力端と逆側の端 (以下、「固定端」とい う）は、本体 20により支持され、固定されている。これにより、超磁歪素子 1の固定端 側の振動を抑制することができるので、超磁歪素子 1の振動を出力端力 効率良く外 部へ伝達することができる。したがって、幅広い周波数において良好な音響特性を実 現することができる。また、固定端を支持する機能、及び超磁歪素子 1にプリストレス を印加する機能を、振動部 10ではなぐ電気信号を入力するための回路などの構成 を含む本体 20に担わせるので、大きな慣性質量を有する部材を振動部 10に設ける 必要がなくなるとともに、超磁歪素子 1を挾持する部材の一方を省略することができる ので、振動部 10を小型ィ匕 '軽量ィ匕することができ、ひいては、ヘッドフォン 50全体を 小型化'軽量化することができる。突起 22は、超磁歪素子 1の固定端側の振動を抑 制するために十分な硬度を有して 、ることが望ま 、。 The end of the giant magnetostrictive element 1 opposite to the output end that transmits vibration to the user (hereinafter referred to as “fixed end”) is supported and fixed by the main body 20. As a result, the vibration on the fixed end side of the giant magnetostrictive element 1 can be suppressed, so that the vibration of the giant magnetostrictive element 1 can be transmitted to the outside efficiently with an output end force. Therefore, good acoustic characteristics can be realized in a wide range of frequencies. In addition, the function of supporting the fixed end and the pre-stress on the giant magnetostrictive element Is applied to the main body 20 including a circuit for inputting an electric signal that is not input by the vibration unit 10, so that it is not necessary to provide a member having a large inertial mass in the vibration unit 10 and the giant magnetostriction. Since one of the members that hold the element 1 can be omitted, the vibration unit 10 can be made small-sized and light-weighted, and thus the entire headphone 50 can be downsized and light-weighted. It is desirable that the protrusion 22 has sufficient hardness to suppress vibration on the fixed end side of the giant magnetostrictive element 1.
[0037] 以上、本発明を実施の形態をもとに説明した。この実施の形態は例示であり、それ らの各構成要素や各処理プロセスの組合せに 、ろ 、ろな変形例が可能なこと、また そうした変形例も本発明の範囲にあることは当業者に理解されるところである。 [0037] The present invention has been described based on the embodiments. This embodiment is an exemplification, and it is obvious to those skilled in the art that various modifications can be made to the combination of each component and each treatment process, and such modifications are also within the scope of the present invention. It is understood.
産業上の利用可能性  Industrial applicability
[0038] 本発明は、音声をユーザに伝達する音声伝達装置に利用することができる。 The present invention can be used for a voice transmission device that transmits voice to a user.

Claims

請求の範囲 The scope of the claims
[1] 音声を発生させるための電気信号を振動に変換する振動部を含む本体と、  [1] a main body including a vibration part that converts an electrical signal for generating sound into vibration;
前記本体をユーザの頭部に装着するための装着部と、  A mounting portion for mounting the main body on a user's head;
前記装着部と前記本体とを軸支する関節部と、を備え、  A joint portion that pivotally supports the mounting portion and the main body,
前記関節部は、前記本体を前記ユーザの頭部に装着したときに、前記振動部を前 記ユーザの頭部へ押し当てる方向へ前記本体を付勢する付勢機構を含む  The joint includes a biasing mechanism that biases the main body in a direction in which the vibration unit is pressed against the user's head when the main body is mounted on the user's head.
ことを特徴とする音声伝達装置。  An audio transmission device characterized by that.
[2] 前記装着部は、前記ユーザの頭部を挟持するように付勢されたアームである ことを特徴とする請求項 1に記載の音声伝達装置。  [2] The audio transmission device according to [1], wherein the mounting unit is an arm biased so as to sandwich the head of the user.
[3] 前記アームは、当該アームを前記ユーザの耳に掛けるための耳掛け部を有する ことを特徴とする請求項 2に記載の音声伝達装置。 [3] The audio transmission device according to [2], wherein the arm has an ear hooking portion for hooking the arm on an ear of the user.
[4] 前記振動部の、前記ユーザの頭部に当接する面は、中心付近が高い凸面である ことを特徴とする請求項 1から 3のいずれかに記載の音声伝達装置。 [4] The audio transmission device according to any one of [1] to [3], wherein a surface of the vibration unit that is in contact with the head of the user is a convex surface having a high center.
[5] 前記振動部の、前記ユーザの頭部に当接する面には、カバーが貼付される力、又 は、被膜が設けられる [5] The surface of the vibrating portion that comes into contact with the user's head is provided with a force for attaching a cover or a coating.
ことを特徴とする請求項 1から 4のいずれかに記載の音声伝達装置。  The sound transmission device according to claim 1, wherein
[6] 前記カバー又は被膜は、弾性を有する [6] The cover or coating has elasticity.
ことを特徴とする請求項 5に記載の音声伝達装置。  The audio transmission device according to claim 5, wherein:
[7] 前記カバー又は被膜の表面は、中心付近が高い凸面である [7] The surface of the cover or coating is a convex surface that is high near the center.
ことを特徴とする請求項 5又は 6に記載の音声伝達装置。  The sound transmission device according to claim 5 or 6, wherein
[8] 前記振動部は、超磁歪素子を含む [8] The vibration unit includes a giant magnetostrictive element.
ことを特徴とする請求項 1から 7のいずれかに記載の音声伝達装置。  The voice transmission device according to claim 1, wherein
PCT/JP2006/313255 2006-07-03 2006-07-03 Voice transmission device WO2008004274A1 (en)

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