[go: up one dir, main page]

WO2022056952A1 - Appareil à conduction osseuse - Google Patents

Appareil à conduction osseuse Download PDF

Info

Publication number
WO2022056952A1
WO2022056952A1 PCT/CN2020/117987 CN2020117987W WO2022056952A1 WO 2022056952 A1 WO2022056952 A1 WO 2022056952A1 CN 2020117987 W CN2020117987 W CN 2020117987W WO 2022056952 A1 WO2022056952 A1 WO 2022056952A1
Authority
WO
WIPO (PCT)
Prior art keywords
vibration
bone conduction
magnetic circuit
conduction device
damping
Prior art date
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.)
Ceased
Application number
PCT/CN2020/117987
Other languages
English (en)
Chinese (zh)
Inventor
陈卫敏
惠耀
陈星弛
刘志伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AAC Technologies Holdings Shenzhen Co Ltd
AAC Technologies Pte Ltd
Original Assignee
AAC Acoustic Technologies Shenzhen Co Ltd
AAC Technologies Pte 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 AAC Acoustic Technologies Shenzhen Co Ltd, AAC Technologies Pte Ltd filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2022056952A1 publication Critical patent/WO2022056952A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the present application relates to the technical field of speakers, and in particular, to a bone conduction device.
  • Bone conduction is a method of sound conduction that uses a vibrator to convert sound into vibrations that are transmitted by direct contact with objects. Compared with the air conduction type that generates sound waves through the diaphragm, bone conduction eliminates many steps of sound wave transmission, and can achieve clear sound restoration in a noisy environment, and sound waves will not affect others due to diffusion in the air. However, the devices in the related art that use bone conduction to play sound have different degrees of sound leakage.
  • a device for suppressing sound leakage which includes: a first bone conduction speaker and a second bone conduction speaker; the first bone conduction speaker is used to generate the same frequency as the sound signal and The first mechanical vibration of the amplitude, wherein the first mechanical vibration drives the air to vibrate to form a leaky sound wave propagating in the air; the second bone conduction speaker is used to generate a phase difference from the first mechanical vibration by a preset angle.
  • the second mechanical vibration wherein the second mechanical vibration drives the air to vibrate to form a restrained sound wave propagating in the air, and the sound leakage is restrained by the interference of the restrained sound wave and the sound leakage sound wave.
  • the device for suppressing sound leakage is composed of two bone conduction loudspeakers assembled into an integral structure, which achieves the sound reduction effect by generating a second mechanical vibration that is different in phase from the first bone conduction mechanical vibration by a preset angle, but its overall structural size is relatively small. Large, low space utilization, it is difficult to meet the current market demand for equipment miniaturization.
  • An object of the present application is to provide a bone conduction device having a small size and suppressing sound leakage.
  • the present application provides a bone conduction device, including a basin frame, a vibration system and a magnetic circuit system; the vibration system includes a vibration assembly and a voice coil arranged on one side of the vibration assembly close to the magnetic circuit system;
  • the magnetic circuit system includes a lower splint and a magnetic circuit assembly disposed on the lower splint to form a magnetic gap; the basin frame and the lower splint are arranged in parallel to form a storage space, the voice coil and the magnetic circuit
  • the component is arranged in the storage space, and the voice coil is inserted into the magnetic gap and drives the vibration component to vibrate;
  • the bone conduction device further includes a connection between the pelvic frame and the lower splint, and the vibration A damping member that provides a reaction force in the opposite direction to the vibration direction of the component when it vibrates.
  • the vibration assembly includes a vibration plate and a conduction plate arranged in parallel, and a vibration conduction column connecting the vibration plate and the conduction plate, and the voice coil is arranged on the vibration plate.
  • the bone conduction device further includes a casing with a cavity, and the basin frame, the voice coil and the magnetic circuit system are accommodated in the cavity; a through hole is provided on one side of the casing, and the vibration conduction column passes through the casing.
  • the vibrating sheet and the conducting sheet are connected through the through holes, so that the vibrating sheet and the conducting sheet are respectively located inside and outside the cavity.
  • the damping member is arranged around the lower clamping plate or a partial area around the lower clamping plate.
  • the damping member is composed of a single mass damping material, a polymer composite damping material, or a metal composite damping structure.
  • the damping member has a square, cylindrical or wave-shaped structure.
  • the damping member is fixedly connected to the basin frame and the lower splint by means of gluing, welding or integral molding.
  • the magnetic circuit assembly includes a main magnetic steel and a secondary magnetic steel arranged on the lower clamping plate, and the auxiliary magnetic steel is arranged around the main magnetic steel and forms a magnetic gap with the main magnetic steel.
  • a bone conduction device is provided, the lower splint and the pelvis are connected by a damping member, and the damping member with damping characteristics is used to provide a reaction force in the direction opposite to the vibration direction of the vibration component when the vibration component vibrates, so as to prevent The shell vibration is reduced without additional structural size, and the effect of suppressing sound leakage is realized to meet the needs of miniaturization.
  • FIG. 1 is a schematic diagram of an exploded three-dimensional structure of an embodiment of the bone conduction device of the present application
  • FIG. 2 is a schematic diagram of the assembly structure of an embodiment of the bone conduction device of the present application.
  • FIG. 3 is a schematic diagram of an exploded three-dimensional structure of another embodiment of the bone conduction device of the present application.
  • FIG. 4 is a schematic diagram of the assembly structure of another embodiment of the bone conduction device of the present application.
  • FIG. 5 is a perspective view of another embodiment of the bone conduction device of the present application.
  • FIG. 6 is a cross-sectional view along line A-A of FIG. 5;
  • FIG. 7 is a schematic structural diagram of a vibration component of the bone conduction device of the present application.
  • FIG. 8 is a schematic structural diagram of the damping member of the bone conduction device of the present application.
  • the present application provides a bone conduction device 100 including a pelvic frame 10 , a vibration system, a magnetic circuit system 30 , and a damping member 40 .
  • the vibration system includes a vibration component 20 and a voice coil 50 .
  • the voice coil 50 is disposed on one side of the vibration component 20 , that is, the side of the vibration component 20 close to the magnetic circuit system 30 .
  • the magnetic circuit system 30 includes a lower clamping plate 31 and a magnetic circuit assembly forming a magnetic gap 34 , and the magnetic circuit assembly is provided on the lower clamping plate 31 .
  • the damping member 40 connects the basin frame 10 and the lower clamping plate 31 to provide a reaction force in a direction opposite to the vibration direction of the vibration assembly 20 when the vibration assembly 20 vibrates.
  • the basin frame 10 and the lower clamping plate 31 are arranged in parallel to form a receiving space for receiving the voice coil 50 and the magnetic circuit assembly.
  • the voice coil 50 is inserted into the magnetic gap 34 and drives the vibration component 20 to vibrate.
  • An opening is formed in the middle of the basin frame 10 , a part of the vibration assembly 20 passes through the opening of the basin frame 10 , and the other part is disposed on the side of the basin frame 10 away from the magnetic circuit system 30 .
  • the voice coil 50 is energized, under the action of the magnetic force of the magnetic circuit system 30 , a part of the vibration component 20 vibrates together with the voice coil 50 through the opening of the basin frame 10 .
  • the damping member 40 is composed of high damping materials, such as single-substance damping materials such as damping rubber, foamed foam, etc., such as polymer composite damping materials mixed with particles mixed with fibers and laminated composite materials, Or metal composite damping structures such as high-damping metal, constrained layer damping structure, etc., by configuring appropriately damped damping parts, the resonance frequency of the magnetic circuit system is consistent with the resonance frequency of the original diaphragm system, so as to achieve the best vibration isolation effect.
  • high damping materials such as single-substance damping materials such as damping rubber, foamed foam, etc.
  • polymer composite damping materials mixed with particles mixed with fibers and laminated composite materials or metal composite damping structures such as high-damping metal, constrained layer damping structure, etc.
  • the damping member 40 in order to enable the damping member 40 to be firmly combined with the basin frame 10 and the lower clamping plate 31, the damping member 40 can be bonded to the basin frame by means of gluing, welding or integral molding. 10 and the lower splint 31 are fixedly connected.
  • the damping member 40 is composed of polymer material, which is glued or ultrasonically welded; the damping member 40 is composed of metal material, which is glued or electrothermally welded; the damping member 40 is composed of a specific process structure and is integrally formed.
  • damping members 40 are provided on both sides of the lower clamping plate 31 respectively; or one damping member 40 (not shown in the figure) is provided around the lower clamping plate 31, or the There are a plurality of damping members 40 (not shown in the figure), which are respectively arranged in a part of the area around the lower clamping plate 31; the connection between the damping member 40 and the basin frame 10 and the lower clamping plate 31 is a straight edge or an R angle, which is not made here. specific restrictions.
  • the damping member 40 may adopt a square, cylindrical or wave-shaped structure to meet the requirement of rigid connection with the basin frame 10 and the lower clamping plate 31 .
  • the present application provides a bone conduction device 100 , including a pelvic frame 10 , a vibration system, a magnetic circuit system 30 , and a damping member 40 .
  • the vibration system includes a vibration assembly 20 and a voice coil 50 .
  • the voice coil 50 is disposed on one side of the vibration assembly 20 , that is, the side of the vibration assembly 20 close to the magnetic circuit system 30 .
  • the magnetic circuit system 30 is used to provide a magnetic field for the voice coil 50, so that when the voice coil 50 passes current, the vibration system is driven to vibrate and contact the head of the human body to generate sound; the magnetic circuit system 30 includes the following: The clamping plate 31 , the main magnetic steel 32 arranged on the lower clamping plate 31 and the auxiliary magnetic steel 33 forming a magnetic gap 34 with the main magnetic steel 32 .
  • the damping member 40 connects the basin frame 10 and the lower clamping plate 31 to provide a reaction force in a direction opposite to the vibration direction when the vibration assembly 20 vibrates.
  • the basin frame 10 and the lower clamping plate 31 are arranged in parallel to form a receiving space for receiving the voice coil 50 and the magnetic circuit assembly.
  • the voice coil 50 is inserted into the magnetic gap 34 and drives the vibration component 20 to vibrate.
  • An opening is formed in the middle of the basin frame 10 , a part of the vibration assembly 20 passes through the opening of the basin frame 10 , and the other part is disposed on the side of the basin frame 10 away from the magnetic circuit system 30 .
  • the voice coil 50 is energized, under the action of the magnetic force of the magnetic circuit system 30 , a part of the vibration component 20 vibrates together with the voice coil 50 through the opening of the basin frame 10 .
  • the damping member 40 is composed of high damping materials, such as single-substance damping materials such as damping rubber, foamed foam, etc., such as polymer composite damping materials mixed with particles mixed with fibers and laminated composite materials, Or for metal composite damping structures such as high-damping metals, constrained layer damping structures, etc., by configuring appropriately damped damping elements 40, the resonance frequency of the magnetic circuit system is consistent with the resonance frequency of the original diaphragm system, so as to achieve the best vibration isolation effect.
  • high damping materials such as single-substance damping materials such as damping rubber, foamed foam, etc.
  • polymer composite damping materials mixed with particles mixed with fibers and laminated composite materials Or for metal composite damping structures such as high-damping metals, constrained layer damping structures, etc.
  • the damping member 40 in order to enable the damping member 40 to be firmly combined with the basin frame 10 and the lower clamping plate 31, the damping member 40 can be bonded to the basin frame by means of gluing, welding or integral molding. 10 and the lower splint 31 are fixedly connected.
  • the damping member 40 is composed of polymer material, which is glued or ultrasonically welded; the damping member 40 is composed of metal material, which is glued or electrothermally welded; the damping member 40 is composed of a specific process structure and is integrally formed.
  • damping members 40 are provided on both sides of the lower clamping plate 31 respectively; or one damping member 40 (not shown in the figure) is provided around the lower clamping plate 31, or the There are a plurality of damping members 40 (not shown in the figure), which are respectively arranged in a part of the area around the lower clamping plate 31; the connection between the damping member 40 and the basin frame 10 and the lower clamping plate 31 is a straight edge or an R angle, which is not made here. specific restrictions.
  • the damping member 40 may adopt a square, cylindrical or wave-shaped structure to meet the requirement of rigid connection with the basin frame 10 and the lower clamping plate 31 .
  • the present application provides a bone conduction device 100 , which includes a pelvic frame 10 , a vibration system, a magnetic circuit system 30 , and a damping member 40 .
  • the vibration system includes a vibration assembly 20 and a voice coil 50 .
  • the magnetic circuit system 30 includes a lower clamping plate 31 and a magnetic circuit assembly forming a magnetic gap 34 , and the magnetic circuit assembly is provided on the lower clamping plate 31 .
  • the damping member 40 connects the basin frame 10 and the lower clamping plate 31 to provide a reaction force in the opposite direction to the vibration direction of the vibration assembly 20 when the vibration assembly 20 vibrates.
  • the basin frame 10 and the lower clamping plate 31 are arranged in parallel to form a receiving space for receiving the voice coil 50 and the magnetic circuit assembly.
  • the voice coil 50 is inserted into the magnetic gap 34 and drives the vibration component 20 to vibrate.
  • the vibration assembly 20 includes a vibration plate 21, a conduction plate 22, and a vibration conduction column 23 connecting the vibration plate 21 and the conduction plate 22.
  • the vibration plate 21 and the conduction plate 22 are arranged in parallel, and the voice coil 50 is disposed on the side of the vibrating sheet 21 away from the conducting sheet 22 .
  • An opening is formed in the middle of the basin frame 10 , a part of the vibration assembly 20 passes through the opening of the basin frame 10 , and the other part is disposed on the side of the basin frame 10 away from the magnetic circuit system 30 .
  • the voice coil 50 is energized, under the action of the magnetic force of the magnetic circuit system 30 , a part of the vibration component 20 vibrates together with the voice coil 50 through the opening of the basin frame 10 .
  • the bone conduction device 100 further includes a casing 60 having a cavity, and the basin frame 10 , the voice coil 50 , and the magnetic circuit system 30 are accommodated in the cavity; one side of the casing 60 is provided with Through hole 61, the vibration conduction column 23 is connected to the vibration plate 21 and the conduction plate 22 through the through hole 61, so that the vibration plate 21 and the conduction plate 22 are respectively located inside the cavity and external.
  • annular thin gasket 11 is also stacked on the basin frame 10 , the basin frame 10 is arranged on the casing 60 through the gasket 11 , and the gasket 11 makes the The load is dispersed to avoid the discomfort caused by severe local vibration and uneven vibration to the user.
  • the damping member 40 is composed of high damping materials, such as single-substance damping materials such as damping rubber, foamed foam, etc., such as polymer composite damping materials mixed with particles mixed with fibers and laminated composite materials, Or metal composite damping structures such as high-damping metal, constrained layer damping structure, etc., by configuring appropriately damped damping parts, the resonance frequency of the magnetic circuit system is consistent with the resonance frequency of the original diaphragm system, so as to achieve the best vibration isolation effect.
  • high damping materials such as single-substance damping materials such as damping rubber, foamed foam, etc.
  • polymer composite damping materials mixed with particles mixed with fibers and laminated composite materials or metal composite damping structures such as high-damping metal, constrained layer damping structure, etc.
  • the damping member 40 in order to enable the damping member 40 to be firmly combined with the basin frame 10 and the lower clamping plate 31, the damping member 40 can be bonded to the basin frame by means of gluing, welding or integral molding. 10 and the lower splint 31 are fixedly connected.
  • the damping member 40 is composed of polymer material, which is glued or ultrasonically welded; the damping member 40 is composed of metal material, which is glued or electrothermally welded; the damping member 40 is composed of a specific process structure and is integrally formed.
  • damping members 40 are provided on both sides of the lower clamping plate 31 respectively; or one damping member 40 (not shown in the figure) is provided around the lower clamping plate 31, or the There are a plurality of damping members 40 (not shown in the figure), which are respectively arranged in a part of the area around the lower clamping plate 31; the connection between the damping member 40 and the basin frame 10 and the lower clamping plate 31 is a straight edge or an R angle, which is not made here. specific restrictions.
  • the damping member 40 may adopt a square, cylindrical or wave-shaped structure to meet the requirement of rigid connection with the basin frame 10 and the lower clamping plate 31 .
  • the bone conduction device 100 of the present application connects the lower splint 31 and the pelvic frame 10 through the damping member 40, and provides a reaction force in the opposite direction to the vibration direction when the vibration component 20 vibrates, thereby reducing the vibration to the housing 60.
  • the damping material structure (damping member), which is equivalent to setting up two sets of suspension systems.
  • the magnetic circuit suspension part vibrates in the opposite direction with the original suspension, and by adjusting the magnetic circuit suspension part
  • the rigidity and damping of the structure makes the force of the basin frame close to zero, which reduces the vibration to the shell and thus reduces the sound leakage and greatly improves the user experience; at the same time, the ampere force increases when vibrating inward, and decreases when vibrating outward Small, increasing the power the speaker can withstand.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

Un appareil à conduction osseuse (100) comprend un saladier (10), un système de vibration et un système de circuit magnétique (30). Le système de vibration comprend un ensemble de vibration (20), et une bobine mobile (50) disposée sur le côté de l'ensemble de vibration (20) à proximité du système de circuit magnétique (30). Le système de circuit magnétique (30) comprend une plaque de serrage inférieure (31) et un ensemble circuit magnétique qui forme un entrefer magnétique (34). L'appareil à conduction osseuse (100) comprend également des éléments d'amortissement (40) qui relient le saladier (10) et la plaque de serrage inférieure (31), et fournissent une force de neutralisation le long de la direction opposée à la direction de vibration de l'ensemble de vibration (20) lorsque l'ensemble de vibration (20) vibre. Les éléments d'amortissement (40) relient la plaque de serrage inférieure (31) et le saladier (10), et les éléments d'amortissement (40), qui ont des caractéristiques d'amortissement, sont utilisés pour fournir la force de neutralisation le long de la direction opposée à la direction de vibration de l'ensemble de vibration (20) lorsque l'ensemble de vibration (20) vibre, de telle sorte que l'appareil à conduction osseuse (100) réduit les vibrations du boîtier sans augmenter davantage la taille de structure, met en œuvre un effet de suppression de fuite sonore, et satisfait les exigences de miniaturisation.
PCT/CN2020/117987 2020-09-15 2020-09-27 Appareil à conduction osseuse Ceased WO2022056952A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202022025491.9U CN213073078U (zh) 2020-09-15 2020-09-15 骨传导装置
CN202022025491.9 2020-09-15

Publications (1)

Publication Number Publication Date
WO2022056952A1 true WO2022056952A1 (fr) 2022-03-24

Family

ID=75558913

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/117987 Ceased WO2022056952A1 (fr) 2020-09-15 2020-09-27 Appareil à conduction osseuse

Country Status (2)

Country Link
CN (1) CN213073078U (fr)
WO (1) WO2022056952A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118695177A (zh) * 2023-03-24 2024-09-24 华为技术有限公司 一种发声装置和终端

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104936108A (zh) * 2015-06-11 2015-09-23 胡锦翔 一种骨传导扬声器装置
CN205179349U (zh) * 2015-11-23 2016-04-20 苏州筹策电子科技有限公司 一种微型可分离无漏音的骨传导扬声器
JP2016116177A (ja) * 2014-12-17 2016-06-23 国立大学法人 名古屋工業大学 骨伝導デバイス
CN207995381U (zh) * 2018-03-20 2018-10-19 孔玉亮 骨传导喇叭
CN109462805A (zh) * 2018-12-29 2019-03-12 瑞声科技（南京）有限公司 扬声器
CN111131960A (zh) * 2020-01-19 2020-05-08 深圳市创想听力技术有限公司 耳挂式骨传导装置
CN111163404A (zh) * 2020-01-03 2020-05-15 深圳市陌音科技有限公司 一种骨传导振子喇叭
CN210807644U (zh) * 2019-12-12 2020-06-19 东莞市铭森电子科技有限公司 一种抑制漏音的骨传导扬声器

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016116177A (ja) * 2014-12-17 2016-06-23 国立大学法人 名古屋工業大学 骨伝導デバイス
CN104936108A (zh) * 2015-06-11 2015-09-23 胡锦翔 一种骨传导扬声器装置
CN205179349U (zh) * 2015-11-23 2016-04-20 苏州筹策电子科技有限公司 一种微型可分离无漏音的骨传导扬声器
CN207995381U (zh) * 2018-03-20 2018-10-19 孔玉亮 骨传导喇叭
CN109462805A (zh) * 2018-12-29 2019-03-12 瑞声科技（南京）有限公司 扬声器
CN210807644U (zh) * 2019-12-12 2020-06-19 东莞市铭森电子科技有限公司 一种抑制漏音的骨传导扬声器
CN111163404A (zh) * 2020-01-03 2020-05-15 深圳市陌音科技有限公司 一种骨传导振子喇叭
CN111131960A (zh) * 2020-01-19 2020-05-08 深圳市创想听力技术有限公司 耳挂式骨传导装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118695177A (zh) * 2023-03-24 2024-09-24 华为技术有限公司 一种发声装置和终端

Also Published As

Publication number Publication date
CN213073078U (zh) 2021-04-27

Similar Documents

Publication Publication Date Title
CN205864733U (zh) 微型发声器件
WO2020173395A1 (fr) Haut-parleur, boîtier de haut-parleur et dispositif électronique portable
CN204442665U (zh) 堆叠式微型扬声器
CN214413036U (zh) 扬声器及终端装置
WO2022143027A1 (fr) Haut-parleur et terminal électronique
WO2022007024A1 (fr) Haut-parleur
WO2025044510A1 (fr) Appareil de production sonore et dispositif électronique
WO2021103070A1 (fr) Haut-parleur et dispositif audio
WO2022000847A1 (fr) Dispositif de production de son
CN207475864U (zh) 一种发声装置及电子设备
CN101536542A (zh) 声学装置以及制造声学装置的方法
WO2021223255A1 (fr) Dispositif sonore
CN108566597A (zh) 一种发声装置
WO2022007170A1 (fr) Dispositif de production de son
WO2022056952A1 (fr) Appareil à conduction osseuse
WO2022067986A1 (fr) Dispositif de génération de son
TWI846075B (zh) 發聲裝置
CN206498529U (zh) 扬声器
CN207475865U (zh) 一种发声装置及电子设备
CN207652682U (zh) 一种发声装置
CN217116340U (zh) 一种具有拆分式振子的骨传导耳机
WO2020158173A1 (fr) Transducteur électroacoustique
WO2014146518A1 (fr) Haut-parleur de tablette
CN115955634A (zh) 电声驱动装置及扬声设备
CN106658312A (zh) 扬声器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20953810

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20953810

Country of ref document: EP

Kind code of ref document: A1