JP2012525721A - Bone conduction headphones - Google Patents

Bone conduction headphones Download PDF

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Publication number
JP2012525721A
JP2012525721A JP2012507154A JP2012507154A JP2012525721A JP 2012525721 A JP2012525721 A JP 2012525721A JP 2012507154 A JP2012507154 A JP 2012507154A JP 2012507154 A JP2012507154 A JP 2012507154A JP 2012525721 A JP2012525721 A JP 2012525721A
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JP
Japan
Prior art keywords
main
vibration
bone conduction
headphone
housing
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Legal status (The legal status 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 status listed.)
Withdrawn
Application number
JP2012507154A
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Japanese (ja)
Inventor
ウイボン パク
Original Assignee
パク ウイボンPACK, Eui−Bong
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
Priority to KR1020090036459A priority Critical patent/KR100937159B1/en
Priority to KR10-2009-0036459 priority
Application filed by パク ウイボンPACK, Eui−Bong filed Critical パク ウイボンPACK, Eui−Bong
Priority to PCT/KR2010/002517 priority patent/WO2010126251A2/en
Publication of JP2012525721A publication Critical patent/JP2012525721A/en
Withdrawn legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00Stereophonic arrangements
    • H04R5/033Headphones for stereophonic communication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00Details of connection covered by H04R, not provided for in its groups
    • H04R2420/07Applications of wireless loudspeakers or wireless microphones
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00Details 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
    • H04R2460/13Hearing devices using bone conduction transducers

Abstract

The present invention embodies a new headphone configuration that includes a main vibration housing 14 that is in contact with the temple and an auxiliary vibration earring 15 that is inserted directly into the ear, so that vibrations that are washed away by the main vibration housing are contained in the ear. The sound of bone conduction is sufficiently transmitted to improve hearing ability, and the auxiliary vibration earring provided in the main vibration housing is used to close the ear hole. There is provided a bone conduction headphone 11 that can effectively reduce the external noise that enters, and can further improve the hearing ability by reducing the external noise in this way.
[Selection] Figure 1

Description

  The present invention relates to a Bluetooth bone conduction headphone capable of wireless data communication, and more particularly, bone conduction with an auxiliary vibration earring capable of reducing the rate of vibration loss transmitted to the skull and reducing external stuttering. Related to headphones.
  In general, the vibration of sound transmitted by air is transmitted by the eardrum in the ear, and the vibration of the eardrum is transmitted to the screw-shaped cochlea through three bones (ear ossicles) located in the eardrum. The
  The cochlea has a liquid called lymph, and the vibration of this liquid is converted into an electrical signal and transmitted to the auditory nerve, and the human brain recognizes the sound.
  Bone conduction headphones eliminate the process of vibration passing through the tympanic membrane and ear ossicles through the sound recognition mechanism, and send sound vibrations directly to the cochlea through the skull, so that even hearing-impaired people with abnormalities in the tympanic membrane and ear ossicles can conduct It is a device that makes it possible to hear sound clearly.
  Various types and forms of such bone conduction headphones have been developed. Most bone-conduction headphones are attached to each other by a wearing part for wearing, an outer frame, a voice coil that is installed inside the frame and forms a magnetic field when an electrical signal is applied thereto, and a magnetic field of the voice coil. It comprises a configuration including at least a pair of magnets that act and vibrate at a predetermined frequency, and a vibrating body that transmits the vibrations of the magnets to the human body.
  As a result, when an electrical signal is applied to the voice coil, a magnetic field proportional to the strength of the electrical signal is formed in the voice coil, and the magnetic field interacts with the magnet to cause the magnet to move up and down in a predetermined direction. When it comes to vibrate at a frequency and such vibration is output through the vibrating body and transmitted to the human body, the human body recognizes a predetermined acoustic signal.
  Conventional bone conduction headphones have a form in which sound can be heard only by vibration transmitted from a main vibration housing that is in contact with the temple portion. However, in this case, not all vibrations generated in the main vibration housing can be transmitted to the skull, and some vibrations are washed away to reduce sound.
  In particular, since headphones are worn with the inside of the ear open to the outside, there is a problem that external stuttering is heard by the ear and obstructs the transmission of sound by bone conduction.
  Accordingly, the present invention has been devised in view of such problems, and embodies a new headphone configuration including a main vibration housing that comes into contact with the temple and an auxiliary vibration earring that is directly inserted into the ear. Therefore, it is possible to induce vibrations that are washed away in the main vibration housing into the ear, thereby sufficiently transmitting sound by bone conduction and providing a bone conduction headphone that can improve hearing ability. The purpose is to do.
  In addition, the present invention can effectively reduce the external noise entering the ear by using the auxiliary vibration earring provided in the main vibration housing, thereby effectively reducing the external noise entering the ear. It is another object of the present invention to provide a bone conduction headphone that can further improve listening ability.
  To achieve the above object, the bone conduction headphones provided in the present invention form a magnetic field when an electric signal is applied to a headphone main body provided with a mounting portion for wearing, and attached to the headphone main body. A main vibration housing including a voice coil, a magnet that interacts with a magnetic field and vibrates at a predetermined frequency, and a main vibration plate that transmits vibrations to the body, and a shape that extends a predetermined length from the vibration plate of the main vibration housing The auxiliary vibration earrings that can be inserted into the ear and generated by the main vibration housing and transmitted to the skull to improve the listening ability are generated. All vibrations are transmitted to the skull without loss, while at the same time reducing external stuttering Characterized in that to improve the force.
  Here, in order to improve the feeling of wearing and to improve the listening ability, it is preferable that the auxiliary vibration earring is configured in a canal type or a circular shape.
  Since the bone conduction headphones provided in the present invention can transmit most of the vibration generated in the main vibration housing to the skull using the auxiliary vibration earrings inserted into the ear, the listening ability is improved. There is an advantage that you can.
  In addition, the auxiliary vibrating earrings can block the ear holes to reduce the transmission of external noise to the ears, so that the listening power can be further doubled.
  In addition, since the inner surface of the Bluetooth main body and the front surface of the main diaphragm are inclined at a predetermined angle, for example, 5 to 15 ° with respect to the vertical line, the wearing feeling is improved and it is inconvenient when wearing glasses or the like. There is an advantage that the feeling can be reduced.
  In addition, since the main vibration housing and the headphone body are connected by a ball structure that allows rolling motion, even if one side of the main diaphragm comes into contact with the body (the temple), other parts naturally come into contact with the ball through free movement. There is an advantage that it is possible to provide a comfortable wearing feeling to the user.
1 is a perspective view showing a bone conduction headphone according to an embodiment of the present invention. It is a front view which shows the bone conduction headphones by one Embodiment of this invention. It is a top view which shows the bone conduction headphones by one Embodiment of this invention. 1 is an enlarged view showing a bone conduction headphone according to an embodiment of the present invention. FIG. FIG. 3 is an enlarged view showing a connection relationship between a headphone main body and a main vibration housing in a bone conduction headphone according to an embodiment of the present invention. It is a side view which shows the wearing condition of the bone conduction headphones by one Embodiment of this invention. It is a perspective view which shows the bone conduction headphones by other embodiment of this invention.
  Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
  1 to 3 are a perspective view, a front view, and a plan view, respectively, showing a bone conduction earphone according to an embodiment of the present invention.
  As shown in FIGS. 1 to 3, the bone conduction headphones include an auxiliary vibration earring that is formed to extend from a main vibration housing that is in contact with a body temple or the like and is inserted into the ear. The main vibration housing can generate enough vibration to guide the vibrations that are washed away into the ear and transmit the sound due to bone conduction, and at the same time, the auxiliary vibration earring blocks the ear hole and It is configured to improve the user's listening ability, such as reducing stuttering.
  For this purpose, the bone conduction headphones include a headphone main body 11 provided with a mounting portion 10 that can be worn on the upper part of the user's head or worn on the back part of the neck. That is, the basic form of the bone conduction headphones has a form in which both the headphone main bodies 11 are connected by the curved mounting portion 10.
  A Bluetooth main body 12 to which a Bluetooth module capable of wireless data communication belongs is installed inside the headphone main body 11.
  Here, the method of using the Bluetooth function provided in the headphone body 11 is the same as the method of using the Bluetooth function provided in a normal bone conduction headphone.
  The bone conduction headphones also include a main vibration housing 14 that is means for transmitting vibrations directly to the skull when listening to wear.
  The main vibration housing 14 is installed on the inner side surface of the lower end portion of the headphone main body 11, and the main vibration housing 14 installed in this way is in a facing configuration.
  In the case of the main vibration housing 14, when an electrical signal is applied inside the housing, a voice coil (not shown) that forms a magnetic field and a magnet that interacts with the magnetic field of the voice coil and vibrates at a predetermined frequency ( (Not shown), and includes a main diaphragm 13 for transmitting the vibration of the magnet to the body.
  As a result, an electric signal is applied to the voice coil in the main vibration housing 14 to form a magnetic field. At this time, the magnetic field interacts with the magnet and the magnet is vibrated at a predetermined frequency in the vertical direction. A series of operation processes output through the diaphragm 13 are included.
  In particular, the bone conduction headphones include an auxiliary vibration earring 15 which is a means for guiding all vibrations generated in the main vibration housing 14 to be transmitted to the skull.
  The auxiliary vibration earring 15 is in contact with the main vibration plate 13 side of the main vibration housing 14 and plays a role of inducing vibration transmitted through the main vibration plate 13 and transmitting it to the skull through the ear.
  For this purpose, the auxiliary vibration earring 15 includes an insertion portion 15a that is directly inserted into the ear and a connection portion 15b that is connected to the main vibration housing 14 on the main diaphragm 13 side. An opening 15c is formed in the main body portion connected from the connecting portion 15b to the insertion portion 15a, so that vibration can be transmitted more effectively. At this time, the connecting portion 15b may be integrally manufactured and connected to the main vibration housing 14, but may be detachably connected to the periphery of the main vibration housing 14 so that the user can selectively use it. it can.
  Such an auxiliary vibration earring 15 can be formed in various shapes depending on its wearing form and function. For example, the insertion portion 15a may be a canal type (FIG. 1) formed in a substantially “U” shape, or a circular shape (FIG. 7) where the insertion portion 15a is formed in a substantially circular shape. . As a result, the user can arbitrarily select and use according to his / her preference.
  Therefore, in the case of the auxiliary vibration earring 15, by inserting it into the ear, the effect of extending the vibration source so as to be close to the skull can be obtained. Since the earrings at this time transmit vibration directly to the skull in the ear, the listening band can be expanded more than before, and the listening power can be increased after all.
  In the case of the auxiliary vibration earring 15, the auxiliary vibration earring 15 is inserted into the ear and plays a role of transmitting vibration, and is inserted into the ear to close the hole of the ear, so that external stuttering is transmitted to the ear. This provides the advantage that the listening ability can be further increased.
  Moreover, it is preferable that the insertion part 15a of the auxiliary | assistant vibration earring 15 inserted directly in an ear includes the cover of the silicone material which improves a feeling of wear and does not give inconvenience even if it uses for a long time.
  On the other hand, as shown in FIG. 4, the bone conduction headphones have a form for improving the feeling of wearing, for example, the inner surface of the Bluetooth main body 12 and the front surface of the main diaphragm 13 in the main vibration housing 14 are 5 perpendicular to the vertical line. Including a form inclined at an angle of ˜15 °.
  As described above, when the inner surface of the Bluetooth main body 12 and the front surface of the main diaphragm 13 are given a predetermined angle with respect to the vertical line, the eyeglasses 100 or the like can pass through the space formed by the angle at this time. Even the wearer of glasses can wear headphones without inconvenience.
  In addition, as shown in FIG. 5, the bone conduction headphones are configured to improve contactability when worn, for example, the headphone main body 11 and the main vibration housing 14 are connected by a ball 16 and a spherical surface 17 to roll. Including forms that can be easily adjusted through movement. That is, the headphone body 11 is provided with a spherical surface 17 on which the ball 16 can be sandwiched and allowed to move. The main vibration housing 14 is formed with the ball 16 protruding, and the rear surface portion of the main vibration housing 14 is the headphone body 11. When the ball 16 is assembled while being seated on the seating surface 18, the angle of the main vibration housing 14 can be freely adjusted through the rolling motion of the ball. it can.
  As described above, the main vibration housing 14 and the headphone body 11 are coupled to each other in a ball structure so that the main vibration housing 14 can roll, so that even if any one surface of the main vibration plate 13 is in contact with the body (the temple), the ball can freely move. The other part can be naturally contacted through a simple movement, and the whole contact surface can be completely contacted with the body.
  Accordingly, the usage state of the bone conduction headphones configured as described above will be described as follows.
  FIG. 6 is a side view showing a wearing state of the bone conduction headphones according to the embodiment of the present invention.
  As shown in FIG. 6, the bone conduction headphones can be worn and used in the form of being hung on the rear portion of the neck using the mounting portion 10 having a generally “U” shape.
  At this time, the main vibration plate 13 of the main vibration housing 14 is brought into contact with the temple portion of the body, and at the same time, the auxiliary vibration earring 15 extended from the main vibration housing 14 is inserted into the ear.
  Accordingly, vibration generated in the main vibration housing 14 can be transmitted to the skull through the temple portion through the main vibration plate 13, and at the same time, some vibrations are guided to the auxiliary vibration earrings 15 and then into the ear. Can be transmitted to the skull through.
  As described above, most of the vibration generated in the main vibration housing 14 is transmitted to the skull through the main diaphragm 13, and particularly located in the inside of the ear so that vibration can be directly transmitted to the skull. Can be increased.
  For example, when an electrical signal related to sound is applied to a voice coil, a magnetic field is formed inside and outside the voice coil in proportion to the strength of the applied electrical signal.
  Such a magnetic field interacts with the magnet, which causes the magnet to vibrate at a predetermined frequency in the vertical direction.
  Such vibration of the magnet is transmitted to the main diaphragm 13, and the vibration of the main diaphragm 13 at this time may be directly applied through the temple portion. It is transmitted directly to the skull through the inside, and the human body eventually recognizes a predetermined acoustic signal.
  As described above, the bone conduction headphones of the present invention can reduce the vibration loss rate transmitted to the skull through the auxiliary vibration earrings, and can effectively reduce the external noise, thereby increasing the listening ability. At the same time, it is possible to further improve the wear feeling and contact through the inclined structure and the ball structure.
DESCRIPTION OF SYMBOLS 10: Mounting part 11: Headphone main body 12: Bluetooth main body 13: Main vibration board 14: Main vibration housing 15: Auxiliary vibration earring 15a: Insertion part 15b: Connection part 15c: Opening part 16: Ball 17: Spherical surface 18: Seating surface

Claims (8)

  1. A headphone body (11) provided with a mounting portion (10) for wearing;
    When an electrical signal is applied to the headphone body (11), a voice coil that forms a magnetic field, a magnet that interacts with the magnetic field and vibrates at a predetermined frequency, and a main diaphragm that transmits vibration to the human body (13) A main vibration housing (14) comprising:
    A connecting portion (15b) connected along the periphery of the main vibration housing (14) corresponding to the installation position of the main diaphragm (13), and a predetermined length extending from the connecting portion (15b) And an insertion portion (15a) to be inserted into
    Listening power can be improved by inserting the insertion part 15a into the ear, receiving the vibration generated in the main vibration housing 14 through the connection part 15b, and transmitting it to the skull. A bone conduction headphone comprising an auxiliary vibration earring (15).
  2.   The bone conduction headphone according to claim 1, wherein the auxiliary vibration earring (15) is formed in a canal type or a circular shape.
  3.   The bone conduction headphone according to claim 1 or 2, further comprising a Bluetooth main body (12) installed in the headphone main body (11) and capable of wireless data communication.
  4.   The inner surface of the Bluetooth main body (12) and the front surface of the main diaphragm (13) in the main vibration housing (14) are inclined at a predetermined angle with respect to a vertical line. Bone conduction headphones.
  5.   The inner surface of the Bluetooth main body (12) and the front surface of the main diaphragm (13) in the main vibration housing (14) are inclined at an angle of 5 to 15 degrees with respect to a vertical line. Item 5. The bone conduction headphones according to Item 4.
  6.   The bone according to claim 1 or 2, characterized in that the headphone body (11) and the main vibration housing (14) are coupled by a ball (16) and a spherical surface (17) capable of adjusting the angle through a rolling motion. Conductive headphones.
  7.   The bone conduction headphones according to claim 1, wherein the insertion portion (15a) of the auxiliary vibration earring (15) is made of a silicone material in order to improve the wearing feeling.
  8.   The bone conduction headphone according to claim 1, wherein the auxiliary vibration earring (15) is detachably connected to the main vibration housing (14).
JP2012507154A 2009-04-27 2010-04-23 Bone conduction headphones Withdrawn JP2012525721A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020090036459A KR100937159B1 (en) 2009-04-27 2009-04-27 Bone conductive headphone
KR10-2009-0036459 2009-04-27
PCT/KR2010/002517 WO2010126251A2 (en) 2009-04-27 2010-04-23 Bone conduction headphones

Publications (1)

Publication Number Publication Date
JP2012525721A true JP2012525721A (en) 2012-10-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012507154A Withdrawn JP2012525721A (en) 2009-04-27 2010-04-23 Bone conduction headphones

Country Status (4)

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JP (1) JP2012525721A (en)
KR (1) KR100937159B1 (en)
CN (1) CN102428712A (en)
WO (1) WO2010126251A2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011130334A (en) * 2009-12-21 2011-06-30 Akiko Nakatani Bone conduction speaker and bone conduction headphone device
JP2016077422A (en) * 2014-10-14 2016-05-16 学校法人関西医科大学 Electronic stethoscope and electronic stethoscope system
KR101773357B1 (en) 2016-02-24 2017-08-31 주식회사 아미스 Walkie-talkie of headphone using for bone conduction speaker
CN109996140A (en) * 2019-04-26 2019-07-09 深圳市普尔特科技有限公司 A kind of instant audio transmission device of wear-type osteoacusis suitable under noisy environment

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KR101377418B1 (en) * 2012-05-08 2014-04-17 메아리소닉코리아 주식회사 bone conduction headphone
CN105072538B (en) * 2015-08-28 2017-03-22 深圳市冠旭电子股份有限公司 Stereo play system and stereo play method
CN106358131A (en) * 2016-08-29 2017-01-25 苏州倍声声学技术有限公司 Bone conduction hearing aids
KR20180054274A (en) * 2016-11-15 2018-05-24 엘지전자 주식회사 Portable sound equipment
KR101876666B1 (en) * 2017-02-15 2018-07-09 서강대학교산학협력단 Bone conduction earset capable of blood stimulation
KR101895154B1 (en) * 2017-02-15 2018-09-04 서강대학교산학협력단 Wireless bone conduction earset capable of blood stimulation
KR101934229B1 (en) * 2018-01-10 2018-12-31 허진숙 Headset for bone conduction
KR102115270B1 (en) * 2019-03-28 2020-05-26 허진숙 bone conduction headse
CN110225430A (en) * 2019-06-12 2019-09-10 付金龙 A kind of noise reduction osteoacusis headset and its noise-reduction method
CN110418235B (en) * 2019-08-02 2020-11-20 温慎洁 Sound producing device
KR102163194B1 (en) * 2019-08-23 2020-10-08 (주)웰튠 Bone Conduction Earphone with Assist Device for Improving Audibility
KR102195936B1 (en) * 2019-11-19 2020-12-29 주식회사 엠아이제이 Bone Conduction Headset for Stimulating the Mastoid and the Auricle

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3882211B2 (en) * 1995-08-23 2007-02-14 ソニー株式会社 Earphone device
JP3532537B2 (en) * 2001-07-05 2004-05-31 株式会社テムコジャパン Bone conduction headset
KR200269539Y1 (en) * 2001-12-28 2002-03-22 김양재 Four ways headphone
KR200346763Y1 (en) * 2004-01-14 2004-04-01 주식회사 소디프 이앤티 Earphone
US7302071B2 (en) * 2004-09-15 2007-11-27 Schumaier Daniel R Bone conduction hearing assistance device
KR20060043937A (en) * 2004-11-11 2006-05-16 주성대학산학협력단 Ear-phone
KR20070049319A (en) * 2005-11-08 2007-05-11 김지호 An earphone
JP4816043B2 (en) * 2005-12-07 2011-11-16 コスモギア株式会社 Headphone device
KR100755239B1 (en) * 2006-07-28 2007-09-04 김성호 Bone conduction headset
JP5055530B2 (en) * 2007-09-10 2012-10-24 コスモギア株式会社 Tip cell with bone conduction speaker and eyeglass frame

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011130334A (en) * 2009-12-21 2011-06-30 Akiko Nakatani Bone conduction speaker and bone conduction headphone device
JP2016077422A (en) * 2014-10-14 2016-05-16 学校法人関西医科大学 Electronic stethoscope and electronic stethoscope system
KR101773357B1 (en) 2016-02-24 2017-08-31 주식회사 아미스 Walkie-talkie of headphone using for bone conduction speaker
CN109996140A (en) * 2019-04-26 2019-07-09 深圳市普尔特科技有限公司 A kind of instant audio transmission device of wear-type osteoacusis suitable under noisy environment
CN109996140B (en) * 2019-04-26 2020-12-04 深圳市普尔特科技有限公司 Head-wearing bone conduction instant audio transmission device suitable for noise environment

Also Published As

Publication number Publication date
CN102428712A (en) 2012-04-25
KR100937159B1 (en) 2010-01-15
WO2010126251A3 (en) 2010-12-29
WO2010126251A2 (en) 2010-11-04

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