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Earphone and ear-worn bone conduction device

外国特許コード F130007635
整理番号 2010-0047US
掲載日 2013年10月2日
出願国 アメリカ合衆国
出願番号 201313765794
公報番号 20130259271
公報番号 9014403
出願日 平成25年2月13日(2013.2.13)
公報発行日 平成25年10月3日(2013.10.3)
公報発行日 平成27年4月21日(2015.4.21)
優先権データ
  • 11JP-0083094 (2011.4.4) 20
  • 12JP-0084293 (2012.4.2) 20
発明の名称 (英語) Earphone and ear-worn bone conduction device
発明の概要(英語) (US9014403)
An earphone comprises: a magnetostrictive element which is composed of a magnetostrictive material and has a column-like shape, the magnetostrictive element expanding and contracting due to magnetostrictive effect; a coil wound around the magnetostrictive element, the coil converting an electrical signal into a change in magnetic field; and an elastic portion which is composed of an elastic body having magnetism, the elastic portion including: a first elastic portion to which one of ends of the magnetostrictive element is joined; a second elastic portion to which the other end of the magnetostrictive element is joined; and a beam portion having a column-like shape and being provided in parallel to the magnetostrictive element between the first elastic portion and the second elastic portion and being integrally formed with the first elastic portion and the second elastic portion.
特許請求の範囲(英語) [claim1]
1. An earphone, comprising: a magnetostrictive element which is composed of a magnetostrictive material and has a column-like shape, the magnetostrictive element expanding and contracting due to magnetostrictive effect;
a coil wound around the magnetostrictive element, the coil converting an electrical signal into a change in magnetic field; and
an elastic portion which is composed of an elastic body having magnetism, the elastic portion including: a first elastic portion to which one of ends of the magnetostrictive element is joined; a second elastic portion to which the other end of the magnetostrictive element is joined; and a beam portion having a column-like shape and being provided in parallel to the magnetostrictive element between the first elastic portion and the second elastic portion and being integrally formed with the first elastic portion and the second elastic portion;
wherein the magnetostrictive element, the beam portion, the first elastic portion, and the second elastic portion are arranged such that expansion and contraction of the magnetostrictive element causes deformation of said elastic portion such that the first and second elastic portions of said elastic portion are flexurally displaced in a direction orthogonal to a longitudinal direction of the magnetostrictive element.
[claim2]
2. An ear-worn bone conduction device, comprising the earphone according to claim 1,
wherein the elastic portion abuts against an ear canal and transmits vibrations between the magnetostrictive element and the ear canal.
[claim3]
3. The earphone according to claim 1, wherein the first elastic portion includes a first magnet configured to apply a bias magnetic field to the magnetostrictive element,
the second elastic portion includes a second magnet configured to apply a bias magnetic field to the magnetostrictive element, and
the first magnet and the second magnet have a same magnetic field orientation, and are located in an orientation in which each of the first magnet and the second magnet generates a magnetic field in a same direction as a longitudinal direction of the magnetostrictive element.
[claim4]
4. The earphone according to claim 1, wherein the elastic portion includes a diaphragm around which the elastic portion abuts against an ear hole.
[claim5]
5. An earphone, comprising: a magnetostrictive element which is composed of a magnetostrictive material and has a column-like shape, the magnetostrictive element expanding and contracting due to magnetostrictive effect;
a coil wound around the magnetostrictive element, the coil converting an electrical signal into a change in magnetic field; and
an elastic portion which is composed of an elastic body having magnetism, the elastic portion including: a first elastic portion to which one of ends of the magnetostrictive element is joined; a second elastic portion to which the other end of the magnetostrictive element is joined; and a beam portion having a column-like shape and being provided in parallel to the magnetostrictive element between the first elastic portion and the second elastic portion and being integrally formed with the first elastic portion and the second elastic portion;
wherein the elastic portion has a circular shape when viewed in a direction in which the elastic portion is located inside the ear hole, and becomes thinner in an area to be located inside the ear hole than in an area to be located at an entrance side of the ear hole.
[claim6]
6. An earphone, comprising: a magnetostrictive element which is composed of a magnetostrictive material and has a column-like shape, the magnetostrictive element expanding and contracting due to magnetostrictive effect;
a coil wound around the magnetostrictive element, the coil converting an electrical signal into a change in magnetic field; and
an elastic portion which is composed of an elastic body having magnetism, the elastic portion including: a first elastic portion to which one of ends of the magnetostrictive element is joined; a second elastic portion to which the other end of the magnetostrictive element is joined; and a beam portion having a column-like shape and being provided in parallel to the magnetostrictive element between the first elastic portion and the second elastic portion and being integrally formed with the first elastic portion and the second elastic portion;
wherein the elastic portion has a circular shape when viewed in a direction in which the elastic portion is located inside the ear hole, and includes a step which makes the elastic portion thinner in an area to be located inside the ear hole than in an area to be located at an entrance side of the ear hole.
[claim7]
7. An ear-worn bone conduction device, comprising the earphone according to claim 3,
wherein the elastic portion abuts against an ear canal and transmits vibrations between the magnetostrictive element and the ear canal.
[claim8]
8. An ear-worn bone conduction device, comprising the earphone according to claim 4,
wherein the elastic portion abuts against an ear canal and transmits vibrations between the magnetostrictive element and the ear canal.
[claim9]
9. An ear-worn bone conduction device, comprising the earphone according to claim 5,
wherein the elastic portion abuts against an ear canal and transmits vibrations between the magnetostrictive element and the ear canal.
[claim10]
10. An ear-worn bone conduction device, comprising the earphone according to claim 6,
wherein the elastic portion abuts against an ear canal and transmits vibrations between the magnetostrictive element and the ear canal.
[claim11]
11. The earphone according to claim 5, wherein the first elastic portion includes a first magnet configured to apply a bias magnetic field to the magnetostrictive element,
the second elastic portion includes a second magnet configured to apply a bias magnetic field to the magnetostrictive element, and
the first magnet and the second magnet have a same magnetic field orientation, and are located in an orientation in which each of the first magnet and the second magnet generates a magnetic field in a same direction as a longitudinal direction of the magnetostrictive element.
[claim12]
12. The earphone according to claim 6, wherein the first elastic portion includes a first magnet configured to apply a bias magnetic field to the magnetostrictive element,
the second elastic portion includes a second magnet configured to apply a bias magnetic field to the magnetostrictive element, and
the first magnet and the second magnet have a same magnetic field orientation, and are located in an orientation in which each of the first magnet and the second magnet generates a magnetic field in a same direction as a longitudinal direction of the magnetostrictive element.
[claim13]
13. The earphone according to claim 5, wherein the elastic portion includes a diaphragm around which the elastic portion abuts against an ear hole.
[claim14]
14. The earphone according to claim 6, wherein the elastic portion includes a diaphragm around which the elastic portion abuts against an ear hole.
  • 発明者/出願人(英語)
  • MIYOSHI MASATO
  • UENO TOSHIYUKI
  • KANAZAWA UNIVERSITY
国際特許分類(IPC)
米国特許分類/主・副
  • 381/190.0
(有)金沢大学ティ・エル・オーは、金沢大学の研究者の出願特許を産業界へ技術移転することを主目的として、金沢大学の教官の出資により設立された技術移転機関です。
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