WO2020040498A1 - Écouteur à conduction osseuse et ensemble d'écouteurs à conduction osseuse - Google Patents

Écouteur à conduction osseuse et ensemble d'écouteurs à conduction osseuse Download PDF

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Publication number
WO2020040498A1
WO2020040498A1 PCT/KR2019/010465 KR2019010465W WO2020040498A1 WO 2020040498 A1 WO2020040498 A1 WO 2020040498A1 KR 2019010465 W KR2019010465 W KR 2019010465W WO 2020040498 A1 WO2020040498 A1 WO 2020040498A1
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WO
WIPO (PCT)
Prior art keywords
bone conduction
extension
earphone
earphones
user
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PCT/KR2019/010465
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English (en)
Korean (ko)
Inventor
허주원
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(주) 모비프렌
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Publication of WO2020040498A1 publication Critical patent/WO2020040498A1/fr

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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
    • H04R1/105—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
    • 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
    • H04R1/1041—Mechanical or electronic switches, or control elements
    • 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

Definitions

  • the present invention relates to a bone conduction device, and more particularly to a bone conduction earphone and a bone conduction earphone package comprising the same.
  • the air conduction method is a method in which sound is transmitted to the inner ear through the eardrum.
  • the vibration of the sound transmitted to the air is transmitted to the eardrum in the ear, and vibrates through three bones located in the eardrum. This is delivered to the cochlea.
  • Bone conduction is a method in which sound from the skull (cranial bone) is transmitted to the cochlea and through the auditory nerve to the brain, eliminating the process by which vibrations pass through the three bones in the eardrum and eardrum. .
  • acoustic vibrations applied to the surface of the skin around the ear are transmitted directly to the cochlea through the skull, so that even if the eardrum or the ear bones are abnormal, if the cochlear and auditory nerves are normal, the sound of bone conduction through the skin can be clearly heard. It will be possible.
  • the bone conduction speaker receives the surrounding noise at the same time by using the ears open, the hearing loss prevention is prevented because the bone conduction principle is used using the bone conduction principle without directly affecting the prevention and safety of the eardrum.
  • Figure 1 shows a typical form of the existing bone conduction earphones.
  • bone conduction earphones are manufactured in the form of a neckband hanging behind the ear as shown.
  • the user who wears the glasses has to hang the leg of the glasses behind the ear, and thus there are many problems in using such a neckband-type bone conduction earphone.
  • bone conduction earphones integrally provided with glasses or sunglasses have appeared.
  • the glasses-integrated bone conduction earphones were not noticed by the wearers as well as the general users.
  • the glasses or sunglasses are not used anymore if they do not suit their tastes while using them as a fashion product.
  • the technical problem to be achieved by the present invention is that bone wear can be mounted on the general eyeglasses wearers, non-wearing glasses can be used in the headband or goggle band or a separate device, such as bone conduction improved the use constraints To provide earphones.
  • Bone conduction earphones for solving the above technical problem, bone conduction unit for converting an electrical signal input to a bone conduction signal and outputs; A housing containing the bone conduction unit; A cover provided on the first side of the housing and in contact with the skin of the user in use to transmit the bone conduction signal to the skin of the user; A first extension part extending from the second side of the housing by a predetermined length in a second direction; And a second extension portion extending from an end portion of the first extension portion, at least a portion of which extends in a direction opposite to the second side direction so that a longitudinal instrument crosses between the first extension portion and the second extension portion. And a second extension to be interposed.
  • the second extension may be disposed on an opposite side of the first side with respect to the first extension, such that the cover may contact the skin of the user with at least a portion of the first extension being in contact with the skin of the user.
  • the second extension part may be made of an elastic material.
  • Insertion grooves are formed in the first extension portion and the second extension portion so as to be in contact with each other, and the first extension portion and the second extension portion are formed through the insertion groove from a point in the first extension portion.
  • An elastic body may be inserted that extends to a point within the two extensions.
  • a space in which the mechanism may be interposed may be formed between the first extension part and the second extension part.
  • a locking protrusion may be formed on a surface of the end portion of the first extension portion that faces the second extension portion, such that the interposed mechanism is caught by the locking protrusion.
  • the bone conduction earphones may further include a connector for inputting the electrical signal transmitted through a cable to the bone conduction unit, and separating and connecting the cable and the bone conduction earphones.
  • the bone conduction earphone package according to the present invention for solving the technical problem, the bone conduction earphone according to the present invention described above;
  • it may include a cable for transmitting the electrical signal from the drive unit to the bone conduction earphone.
  • the bone conduction earphones may further include a connector for connecting and disconnecting the cable and the bone conduction earphones.
  • the bone conduction earphone package further includes a speaker earphone that can be worn on a user's ear, and the speaker earphone includes a connector for connecting and disconnecting the cable and the speaker earphone, wherein the bone conduction earphone and the speaker are connected to the connector. Earphones can be selectively connected.
  • the speaker earphone may include a resistor for attenuating the volume.
  • the wearer of the eyeglasses can be used to attach to normal glasses and non-wearing glasses can be used to attach to the headband or goggle band or a separate device, such as bone conduction earphones with improved use restrictions Can provide.
  • Figure 1 shows a typical form of the existing bone conduction earphones.
  • Figure 2 shows the bone conduction earphones integrally provided in the glasses or sunglasses.
  • 3a to 3c show the external appearance of the bone conduction earphone according to an embodiment of the present invention.
  • FIGS. 4A and 4B illustrate an exploded view of a bone conduction earphone according to an embodiment of the present invention.
  • FIG. 5 is a cross-sectional view of a bone conduction earphone according to an embodiment of the present invention.
  • FIG. 6 illustrates a mechanism T1 in a length direction such as a spectacle leg of an eyeglass frame interposed between the first extension part 140 and the second extension part 150 of the bone conduction earphone 100 according to an embodiment of the present invention. Show the appearance.
  • FIG. 7 illustrates a mechanism T2 in a length direction such as a hair band or a goggle band between a first extension part 140 and a second extension part 150 of the bone conduction earphone 100 according to an embodiment of the present invention. It looks like.
  • Figure 8 shows the configuration of the bone conduction earphone package according to an embodiment of the present invention.
  • FIG. 9 illustrates a state in which the speaker earphones 400_1 and 400_2 are mounted to the cables 310_1 and 310_2 instead of the bone conduction earphones 100_1 and 100_2 in the bone conduction earphone package according to the embodiment of the present invention.
  • FIG. 10 is a schematic internal configuration of speaker earphones 400_1 and 400_2 according to an embodiment of the present invention.
  • Figure 11 shows an example of a separate mechanism for mounting the bone conduction earphones 100, which may be additionally provided in the bone conduction earphone package according to an embodiment of the present invention.
  • FIG. 12 is an example of a state of use of the bone conduction earphone package according to an embodiment of the present invention, shows a state of use using the bone conduction earphones 100 mounted on the glasses.
  • Figure 13 shows another example of the use state of the bone conduction earphone package according to an embodiment of the present invention, using the bone conduction earphones 100 attached to the headband.
  • FIG. 14 is another example of the use state of the bone conduction earphone package according to an embodiment of the present invention, the use state using the bone conduction earphones 100 mounted on a separate device 500 shown in FIG. Shows.
  • FIGS. 4A and 4B and 5 are views showing the configuration of the bone conduction earphone according to the embodiment of the present invention.
  • FIGS. 3A to 3B are appearance configurations
  • FIGS. 4A and 4B are exploded views
  • FIG. Represents a cross-sectional view.
  • the bone conduction unit 210, the first housing 110, the second housing 120, the cover 130, the first extension 140, The second extension part 150 may include an elastic body 152 and a connector 220.
  • the bone conduction unit 210 converts an input electrical signal into a bone conduction signal and outputs it.
  • the bone conduction unit 210 typically consists of a frame, voice coil, magnet, diaphragm, or the like.
  • the first housing 110 accommodates the bone conduction unit 210, and the opening 111 is formed in the first side direction on the first side.
  • the first side refers to a side in contact with the side of the face of the user when the bone conduction earphone 100 is used, that is, a side facing the side of the face of the user.
  • the cover 130 is provided on the first side of the first housing 110 and is coupled to the first housing 110 to cover the opening 111.
  • the cover 130 has an inner side in close contact with the diaphragm of the bone conduction unit 210, and in use, the outer side contacts the skin of the side surface of the user's face (preferably the skin in front of the ear) from the bone conduction unit 210. It serves to deliver bone conduction signals to the user's skin.
  • the cover 130 is a portion which is in direct contact with the user's skin, it is preferably made of a soft material such as silicone or urethane.
  • the second housing 120 is coupled to the first housing 110 on the opposite side of the first side, so that the bone conduction unit 210 is accommodated in the coupled first housing 110 and the second housing 120.
  • the first housing 110 and the second housing 120 are separately formed and coupled to each other, but the first housing 110 and the second housing 120 may be integrally formed. Of course.
  • the first extension part 140 extending from the second side of the combined first housing 110 and the second housing 120 by a predetermined length in the second side direction is provided.
  • the first extension part 140 may be formed of a material having a suitable elasticity, such as plastic or metal.
  • the second side is any one side of the side when the first side is used as the front of the housings 110 and 120, and the second side is generally upward along the side of the face of the user when using the bone conduction earphones 100. Direction (see FIGS. 6 and 12).
  • the first extension part 140 may be formed integrally with the second housing 120, but may be formed integrally with the first housing 110 instead of the second housing 120.
  • the first housing 110 and the second housing 120 may be formed separately and combined with the first housing 110 or the second housing 120.
  • An end portion of the first extension portion 140 is provided with a second extension portion 150 extending from the end portion of the first extension portion 140. At least a part of the second extension part 150 extends in a direction opposite to the second side direction (ie, the direction toward the second housing 120), such that the first extension part 140 and the second extension part 150 are provided. In between, a longitudinal instrument (eg, which the user can wear on the head, intersects the spectacle legs of the spectacle frame, hair band, goggle band, etc.) is intersected.
  • a longitudinal instrument eg, which the user can wear on the head, intersects the spectacle legs of the spectacle frame, hair band, goggle band, etc.
  • the second extension part 150 is disposed on the side opposite to the first side (ie, the cover 130 side) with respect to the first extension part 140, so that when the bone conduction earphone 100 is used, the first extension part ( The cover 130 may also be in contact with the user's skin while at least a portion of the 140 is in contact with the user's skin.
  • the second extension 150 extends from the end of the first extension 140 and then the second extension 150 ends toward the second housing 120, so in this embodiment the first extension Part 140 is set to '
  • the second extension part 150 has a '' shape, but alternatively, the first extension part 140 has a ' ⁇ ' shape and the second extension part 150 has a '
  • a space 151 through which the mechanism may be interposed may be formed between the first extension part 140 and the second extension part 150.
  • a locking protrusion 141 is formed on an upper surface of the space 151, that is, a surface facing the second extension part 150 at the end of the first extension part 140, and thus the first extension part 140.
  • the mechanism interposed between the second extension portion 150 and the locking protrusion 141 see FIG. 6) so that the mechanism does not rise to the end of the first extension portion 140, but rather the first extension portion 140. To span the middle of the.
  • the instrument in the longitudinal direction can be smoothly inserted into the space between the first extension portion 140 and the second extension portion 150 from below the end of the second extension portion 150, the space (
  • the second extension part 150 may be made of an elastic material such as silicon so as to intervene or hold the interposed mechanism thicker than the gap of 151.
  • a metal may be disposed over the first extension part 140 and the second extension part 150 so that the mechanism interposed between the first extension part 140 and the second extension part 150 can be more stably fixed.
  • the elastic body 152 may be provided. To this end, insertion grooves 142 and 154 are formed to abut on each of the first extension part 140 and the second extension part 150, and communicated with the insertion groove 142 in the first extension part 140.
  • An insertion space is formed and an insertion space 155 in communication with the insertion groove 154 is also formed in the second extension part 150, so that the first extension part is formed in the first extension part 140 and the second extension part 150.
  • An elastic body 152 extending from one point in the 140 to one point in the second extension part 150 via the insertion grooves 142 and 154 may be inserted.
  • the cross section of the elastic body 152 may have a '-' shape in which a portion of the second extension part 150 is longer than the portion of the first extension part 140.
  • a locking part 153 may be formed at a side of the second extension part 150 facing the first extension part 140 so that the elastic body 152 is not separated.
  • FIG. 6 is a device T1 in a length direction such as a spectacle leg of an eyeglass frame interposed between the first extension part 140 and the second extension part 150 of the bone conduction earphone 100 according to an embodiment of the present invention.
  • the first extension part 140 and the cover 130 are in close contact with the side surface of the user.
  • FIG. 6A illustrates a state in which the device T1 is interposed between the first extension part 140 and the second extension part 150 without the user wearing the device T1.
  • b) is a bone conduction earphone 100 is interposed between the first extension portion 140 and the second extension portion 150 in the state in which the user wearing the instrument (T1) on the face (or head) This deformed state is shown.
  • the instrument T1 transverses about halfway between the first extension portion 140 and the second extension portion 150.
  • the first extension is caused by the force exerted by the instrument T1 toward the user's face and by the elasticity of the relatively thin portion of the first extension portion 140 (the portion at which the instrument T1 is interposed and the portion below it).
  • the part interposed between the part T1 of the part 140 and the upper part thereof is in close contact with applying pressure P1 to the side of the face, and accordingly, the cover 130 below the part T1 is also the side of the face (the front part of the ear). 12, the pressure P2 is in close contact.
  • the bone conduction signal coming out of the cover 130 is delivered to the skin in front of the user's ear to act as a bone conduction earphone.
  • extending the first extension portion 140 by a predetermined length (for example, about 15 to 25 cm) upward from the portion where the mechanism T1 is interposed helps the bone conduction earphone 100 to be in close contact with the side of the face at an appropriate pressure.
  • FIG. 7 illustrates a mechanism T2 in a length direction such as a hair band or a goggle band between a first extension part 140 and a second extension part 150 of the bone conduction earphone 100 according to an embodiment of the present invention.
  • the first extension part 140 and the cover 130 are in close contact with the side surface of the user.
  • FIG. 7A illustrates a state in which the device T2 is interposed between the first extension part 140 and the second extension part 150 without the user wearing the device T2.
  • b) is a bone conduction earphone 100 is interposed between the first extension portion 140 and the second extension portion 150 in the state in which the user wearing the instrument (T2) on the face (or head) This deformed state is shown.
  • the hair band or goggle band may be intersected across a relatively wide area between the first extension 140 and the second extension 150 as shown. Since the hair band or the goggle band also provides a force applied to the face of the user, as shown in FIG. 6, the portion including the mechanism T2 of the first extension part 140 exerts a pressure P1 on the side of the face. In this case, the cover 130 under the apparatus T2 may also be pressed while applying pressure P2 to the side of the face (front part of the ear, see FIG. 13).
  • the bone conduction earphone 100 inputs an electrical signal transmitted through a cable to the bone conduction unit 210 and inputs the cable and the bone conduction earphone 100. It may be provided with a connector 220 for connecting and disconnecting.
  • the connector 220 may be, for example, an MMCX connector.
  • the connector provided in the bone conduction earphone 100 may be an MMCX female connector, and the connector provided in the cable may be an MMCX male connector.
  • Figure 8 shows the configuration of the bone conduction earphone package according to an embodiment of the present invention.
  • Bone conduction earphone package according to an embodiment of the present invention, the left bone conduction earphone 100_1 and the right bone conduction earphone 100_2 corresponding to the bone conduction earphone 100 described above, a mobile terminal such as a smartphone or tablet PC Drive unit for receiving the music data using a Bluetooth, etc. from the bone conduction earphones (100_1, 100_2) for supplying an electrical signal and a neckband type housing 300 therein, bone electrical signal from the drive unit
  • cables 310_1 and 310_2 to be transferred to the earphones 100_1 and 100_2 and user housings 320_1 and 320_2 may be provided in the housing 300 to allow a user to operate the on / off, volume, and the like.
  • the housing 300 incorporating the drive unit may be implemented in various forms such as a neck band form, a form that can be carried around the hand or a neck hanging in a necklace manner.
  • the bone conduction earphones 100_1 and 100_2 have the connectors 220_1 and 220_2 as described above, and the cables 310_1 and 310_2 also include the connectors 311_1 and 311_2, so that the bone conduction earphones 100_1 and 100_2 are connected to the cables.
  • the 310_1 and 310_2 may be separated from each other.
  • the cables 310_1 and 310_2 may be equipped with speaker earphones that can be worn on the user's ears.
  • FIG. 9 illustrates a state in which the speaker earphones 400_1 and 400_2 are mounted to the cables 310_1 and 310_2 instead of the bone conduction earphones 100_1 and 100_2 in the bone conduction earphone package according to the embodiment of the present invention.
  • the speaker earphones 400_1 and 400_2 may also include connectors (eg, MMCX connectors) that connect and disconnect the cables 310_1 and 310_2 and the speaker earphones 400_1 and 400_2.
  • connectors eg, MMCX connectors
  • bone conduction earphone package since bone conduction earphones and speaker earphones can be selectively used, for example, bone conduction earphones are used in outdoor activities such as having to listen to surrounding sounds even while listening to music. If not, there is an advantage that the user can use the bone conduction earphones and speaker earphones as desired depending on the use situation, such as using speaker earphones.
  • bone conduction earphones and speaker earphones generally have different frequency characteristics and sound quality. Therefore, when the bone conduction earphones 100_1 and 100_2 and the speaker earphones 400_1 and 400_2 are selectively used, the earphones being used are the bone conduction earphones in a mobile terminal such as a smartphone or a tablet PC that provides music data to the driving unit. Depending on whether it is a speaker or an earphone, an application that provides music data by applying different tunings may be installed. Alternatively, the drive unit may be provided with means for providing different tunings depending on whether it is a bone conduction earphone or a speaker earphone. This ensures that optimal sound quality is provided regardless of whether you use bone conduction earphones or speaker earphones.
  • bone conduction earphones are generally driven with a relatively large amplification than speaker earphones. Therefore, when the bone conduction earphones and the speaker earphones are used interchangeably, driving the speaker earphones with an amplification matched to the bone conduction earphones may cause a user's hearing to be excessive due to excessive volume when listening to music or talking on the phone.
  • a resistor R may be provided on a signal line connected to the speaker unit 410 of the speaker earphones 400_1 and 400_2, as shown in FIG. 10. The volume of the speaker unit 410 may be attenuated through the resistor R.
  • the size of the resistor R may be determined such that the volume the user feels through the speaker earphone when the volume is maximized is similar to the maximum volume of the bone conduction earphone.
  • Figure 11 shows an example of a separate mechanism for mounting the bone conduction earphones 100, which may be additionally provided in the bone conduction earphone package according to an embodiment of the present invention.
  • the bone conduction earphone 100 may be used by being worn by a user wearing glasses, a hair band, a goggle band, etc., but without wearing glasses, a hair band, a goggle band, and the like.
  • the bone conduction earphone package may provide a separate device 500 that can be worn on the user's head by mounting the bone conduction earphone 100.
  • the separate device 500 is made of an elastic material to be worn on the user's head and has a generally circular shape and is provided at both ends of the head wearing part 510 and both ends of the head wearing part 510. And intervening portions 520_1 and 520_2 formed to intersect between the first extension 140 and the second extension 150 of the left bone conduction earphone 100_1 and the right bone conduction earphone 100_2. can do.
  • FIG. 12 is an example of a state of use of the bone conduction earphone package according to an embodiment of the present invention, shows a state of use using the bone conduction earphones 100 mounted on the glasses.
  • the left bone conduction earphone 100_1 is mounted on the left eyeglasses leg T1 to be in close contact with the skin in front of the left ear
  • the right bone conduction earphones 100_2 are mounted on the right eyeglasses leg although not visible from the other side. Adheres to the skin in front of the right ear.
  • Figure 13 shows another example of the use state of the bone conduction earphone package according to an embodiment of the present invention, using the bone conduction earphones 100 attached to the headband.
  • the left bone conduction earphone 100_1 is mounted to the front part of the left ear of the hair band T2 to be in close contact with the skin in front of the left ear, and the right bone conduction earphone 100_2 is not visible because it is opposite. It is mounted on the front part of the right ear, and is pressed against the skin in front of the right ear.
  • the hair band is taken as an example, but the embodiment of the present invention may be equally applied to other types of bands such as a goggle band.
  • the bone conduction earphone 100 is used to install the separate device 500 shown in FIG. Shows.
  • the user may wear the instrument 500 over the back of the head from the top of the ear.
  • the left bone conduction earphone 100_1 is mounted on the left interposition portion 520_1 of the instrument 500 and is in close contact with the skin in front of the left ear, and the right bone conduction earphone 100_2 is not visible because it is opposite. It is attached to the right interposition portion 520_2 of 500, and is in close contact with the skin in front of the right ear.
  • the present invention can be used in the case of eyeglass wearers can be mounted on the normal glasses and in the case of non-wearing eyewear can be attached to the headband or goggle band or a separate device, it is possible to improve the use restrictions, bone conduction earphones and speaker earphones Has the advantage of providing a bone conduction earphone package that can be selectively used.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Headphones And Earphones (AREA)

Abstract

Un écouteur à conduction osseuse selon la présente invention comprend : une unité de conduction osseuse pour convertir des signaux électriques entrants en signaux de conduction osseuse et les émettre; un boîtier contenant l'unité de conduction osseuse; un couvercle, prévu sur un premier côté du boîtier, pour transmettre les signaux de conduction osseuse à la peau d'un utilisateur en entrant en contact avec elle lors de l'utilisation; une première partie étendue s'étendant sur une distance déterminée à partir d'un deuxième côté du boîtier dans la direction du deuxième côté; et une deuxième partie étendue qui s'étend à partir de l'extrémité de la première partie étendue, et dont au moins une partie s'étend dans la direction opposée à la direction du deuxième côté de manière à permettre l'interposition d'un dispositif longitudinal entre la première partie étendue et la deuxième partie étendue.
PCT/KR2019/010465 2018-08-20 2019-08-19 Écouteur à conduction osseuse et ensemble d'écouteurs à conduction osseuse WO2020040498A1 (fr)

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KR10-2018-0096817 2018-08-20
KR1020180096817A KR102089729B1 (ko) 2018-08-20 2018-08-20 골전도 이어폰 및 골전도 이어폰 패키지

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KR20090036497A (ko) * 2007-10-09 2009-04-14 지디텍 주식회사 방수기능을 갖는 골전도 이어폰장치
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KR20160128086A (ko) * 2015-04-28 2016-11-07 홍순민 무선헤드셋
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CN113766373A (zh) * 2020-06-03 2021-12-07 北京字节跳动网络技术有限公司 可穿戴设备

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