WO2024119340A1 - 同轴耳机芯 - Google Patents

同轴耳机芯 Download PDF

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Publication number
WO2024119340A1
WO2024119340A1 PCT/CN2022/136717 CN2022136717W WO2024119340A1 WO 2024119340 A1 WO2024119340 A1 WO 2024119340A1 CN 2022136717 W CN2022136717 W CN 2022136717W WO 2024119340 A1 WO2024119340 A1 WO 2024119340A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm
magnetic
fixed
earphone core
yoke
Prior art date
Application number
PCT/CN2022/136717
Other languages
English (en)
French (fr)
Inventor
任璋
钟志威
Original Assignee
瑞声光电科技(常州)有限公司
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Filing date
Publication date
Application filed by 瑞声光电科技(常州)有限公司 filed Critical 瑞声光电科技(常州)有限公司
Priority to PCT/CN2022/136717 priority Critical patent/WO2024119340A1/zh
Priority to US18/324,183 priority patent/US20240187782A1/en
Publication of WO2024119340A1 publication Critical patent/WO2024119340A1/zh

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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
    • H04R9/06—Loudspeakers
    • 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
    • H04R1/1016—Earpieces of the intra-aural type
    • 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
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/127—Non-planar diaphragms or cones dome-shaped
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • 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
    • H04R9/025—Magnetic circuit
    • 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
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/045—Mounting
    • 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
    • H04R9/063—Loudspeakers using a plurality of acoustic drivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers

Definitions

  • the utility model relates to the field of electroacoustic conversion, in particular to a coaxial earphone core.
  • a magnetic circuit system is generally provided in the earphone core, which is used to provide mid-bass sound effects. If treble sound effects are required at the same time, two coaxial magnetic circuit systems and vibration systems are required. The overlap of the two magnetic circuit systems increases the axial height of the earphone core, making it inconvenient to install, reducing the applicability of the product, and is not conducive to the development trend of lightweight existing earphones.
  • the diaphragm of one vibration system surrounds the outside of the diaphragm of the other vibration system, which reduces the effective vibration area of the diaphragm on the outside, reducing the sound effect of the earphone core to a certain extent.
  • the utility model aims to provide an earphone core with better sound effect.
  • the utility model proposes a coaxial earphone core, which includes a first basin frame, a second basin frame, a magnetic circuit system, and a first sound unit and a second sound unit arranged coaxially, the first basin frame is arranged on the outside of the second basin frame, the first sound unit is arranged on the peripheral side of the second sound unit, the first sound unit includes a first diaphragm and a first voice coil fixed to the first diaphragm, the outside of the first diaphragm is fixed to the first basin frame, the second sound unit includes a second diaphragm and a second voice coil fixed to the second diaphragm, the magnetic circuit system includes a first yoke fixed to the first basin frame, a first magnetic steel fixed to the first yoke, and a spacer ring is arranged on the first magnetic The second magnetic steel is arranged on the outer side of the steel and forms a first magnetic gap, and the first voice coil is inserted in the first magnetic
  • the first diaphragm includes a first inner diaphragm located in a middle position and in a ring shape, a first spherical top surrounding the first inner diaphragm, a first skeleton surrounding the first spherical top, and a first outer diaphragm surrounding the first skeleton, and the second diaphragm is located on a side of the first inner diaphragm close to the magnetic circuit system along the vibration direction.
  • the coaxial earphone core further comprises a front cover arranged above the second diaphragm, and the inner side of the first inner diaphragm is fixed to the front cover.
  • the front cover is provided with a sound outlet penetrating therethrough along the vibration direction, and the sound outlet is arranged opposite to the second diaphragm.
  • the front cover includes an outer edge arranged in a ring around the outside of the second basin frame, an inner edge located above the second diaphragm and surrounding the sound outlet, and a middle part connecting the inner edge and the outer edge, and the outer edge is fixed to the surface of the third magnetic steel away from the second magnetic yoke.
  • the inner side of the first inner diaphragm is fixed to the middle portion.
  • the first voice coil is fixed to a surface of the first skeleton facing the first magnetic gap.
  • the first dome includes a first connecting portion connected to the outer side of the first inner diaphragm, a second connecting portion connected to the first skeleton, and an extending portion connecting the first connecting portion and the second connecting portion, wherein the extending portion extends from the second connecting portion toward the first connecting portion and away from the second diaphragm.
  • the inner edge of the front cover is bent from the middle portion in a direction away from the second diaphragm and extends to the inner side of the first inner diaphragm, and the inner side of the first inner diaphragm surrounds the inner edge.
  • the coaxial earphone core also includes a support member fixed to the magnetic circuit system, the first magnetic yoke is provided with a first through hole penetrating therethrough along the vibration direction, the support member includes a first supporting portion received in the first through hole and fixed to the first magnetic yoke, a second supporting portion extending from the first supporting portion toward the second diaphragm, and a third supporting portion extending from the second supporting portion toward the second diaphragm, the second supporting portion extends into the first magnetic steel, and the third supporting portion extends into the extension wall of the second magnetic yoke.
  • the magnetic circuit system includes a first yoke, a first magnet, a second magnet with a spacer ring arranged on the outside of the first magnet to form a first magnetic gap, a second yoke fixed to the first magnet, and a third magnet fixed to the second yoke and in a ring shape
  • the second yoke includes an extension arm bent and extending to the inside of the third magnet and spaced from the third magnet to form a second magnetic gap
  • the first voice coil is inserted in the first magnetic gap
  • the second voice coil is inserted in the second magnetic gap
  • the first sound unit surrounds the outside of the second sound unit
  • the second diaphragm is located on the side of the first diaphragm close to the magnetic circuit system, which makes full use of the space under the first diaphragm, improves space utilization, effectively reduces the axial height of the coaxial earphone core, and enhances product applicability; and there is no need to sacrifice
  • FIG1 is a perspective view of an earphone core of the present invention.
  • FIG2 is an exploded view of the earphone core of the present invention.
  • Fig. 3 is a cross-sectional view along line A-A in Fig. 1;
  • FIG4 is an enlarged view of portion B in FIG3 ;
  • FIG. 5 is an enlarged view of portion C in FIG. 3 .
  • the utility model provides a coaxial earphone core 100, which includes a first basin frame 1, a second basin frame 2, a magnetic circuit system 3, and a first sound unit 4 and a second sound unit 5 which are coaxially arranged.
  • the first basin frame 1 is arranged on the outside of the second basin frame 2, and the first sound unit 4 is arranged on the surrounding side of the second sound unit 5.
  • the first sound-emitting unit 4 includes a first diaphragm 41 and a first voice coil 42 fixed to the first diaphragm 41, and the outer side of the first diaphragm 41 is fixed to the first basin frame 1; the first voice coil 42 drives the first diaphragm 41 to vibrate and produce sound.
  • the second sound-emitting unit 5 includes a second diaphragm 51 and a second voice coil 52 fixed to the second diaphragm 51; the second voice coil 52 drives the second diaphragm 51 to vibrate and produce sound.
  • the first sound-emitting unit 4 is a mid-bass sound-emitting unit, providing mid-bass sound effects
  • the second sound-emitting unit 5 is a treble sound-emitting unit, providing treble sound effects
  • the coaxial earphone core 100 is a full-band earphone core, which can provide high-quality sound effects in the full band.
  • the magnetic circuit system 3 includes a first magnetic yoke 31 fixed to the first basin frame 1, a first magnetic steel 32 fixed to the first magnetic yoke 31, and a second magnetic steel 34 with a spacer ring arranged outside the first magnetic steel 32 and forming a first magnetic gap 33; wherein the first voice coil 42 is inserted into the first magnetic gap 33.
  • the magnetic circuit system 3 also includes a second magnetic yoke 35 fixed to the surface of the first magnetic steel 32 away from the first magnetic yoke 31 and a third magnetic steel 36 fixed to the second magnetic yoke 35 and in an annular shape, the second basin frame 2 is fixed to the surface of the third magnetic steel 36 away from the second magnetic yoke 35, and the second diaphragm 51 is fixed to the second basin frame 2;
  • the second magnetic yoke 35 includes an annular extension wall 351 that is bent and extended into the third magnetic steel 36, and the extension wall 351 is spaced from the third magnetic steel 36 to form a second magnetic gap 37, the second voice coil 52 is inserted into the second magnetic gap 37, and the second diaphragm 51 is located on the side of the first diaphragm 41 close to the magnetic circuit system 3 along the vibration direction.
  • the first diaphragm 41 includes a first inner diaphragm 411 located in the middle and in an annular shape, a first dome 412 surrounding the first inner diaphragm 411, a first frame 413 surrounding the first dome 412, and a first outer diaphragm 414 surrounding the first frame 413, the second diaphragm 51 is located on a side of the first inner diaphragm 411 close to the magnetic circuit system 3 along the vibration direction, and the first voice coil 42 is fixed to the surface of the first frame 413 facing the first magnetic gap 33.
  • the first dome 412 includes a first connecting portion 4121 connected to the outer side of the first inner diaphragm 411, a second connecting portion 4122 connected to the first frame 413, and an extending portion 4123 connecting the first connecting portion 4121 and the second connecting portion 4122, and the extending portion 4123 extends from the second connecting portion 4122 toward the first connecting portion 4121 and away from the second diaphragm 51. Therefore, the second sound unit 5 is arranged below the first diaphragm 41 of the first sound unit 4, making full use of the space below the first diaphragm 41, improving the space utilization, effectively reducing the axial height of the coaxial earphone core 100, and enhancing the applicability of the product.
  • the second diaphragm 51 is arranged below the first diaphragm 41, there is no need to sacrifice the area of the first diaphragm 41, thereby ensuring that the first diaphragm 41 has a sufficient vibration area, effectively improving the sound effect of the earphone core 100.
  • the coaxial earphone core 100 further includes a front cover 6 covering the second diaphragm 51, and the inner side of the first inner diaphragm 411 is fixed to the front cover 6.
  • the front cover 6 is provided with a sound outlet 61 penetrating therethrough along the vibration direction, and the sound outlet 61 is arranged opposite to the second diaphragm 51, and the sound waves emitted by the second diaphragm 51 are transmitted to the outside through the sound outlet 61.
  • the front cover 6 includes an outer edge 62 arranged around the outer side of the second basin frame 2, an inner edge 63 located above the second diaphragm 51 and surrounding the sound outlet 61, and a middle portion 64 connecting the inner edge 63 and the outer edge 62, the outer edge 62 is fixed to the surface of the third magnetic steel 36 away from the second magnetic yoke 35, and the inner side of the first inner diaphragm 411 is fixed to the middle portion 64. Further, the inner edge 63 of the front cover 6 is bent from the middle portion 64 to extend in a direction away from the second diaphragm 51 to the inner side of the first inner diaphragm 411, and the inner side of the first inner diaphragm 411 surrounds the inner edge 63.
  • the coaxial earphone core 100 also includes a support member 7 fixed to the magnetic circuit system 3, and the first magnetic yoke 31 is provided with a first through hole 311 penetrating therethrough along the vibration direction.
  • the support member 7 includes a first support portion 71 received in the first through hole 311 and fixed to the first magnetic yoke 31, a second support portion 72 extending from the first support portion 71 toward the second diaphragm 51, and a third support portion 73 extending from the second support portion 72 toward the second diaphragm 51, the second support portion 72 extends into the first magnetic steel 32, and the third support portion 73 extends into the extension wall 351 of the second magnetic yoke 35; it can be understood that the third support portion 73 is arranged relative to the second diaphragm 51 along the vibration direction.
  • the earphone core provided by the utility model comprises a magnetic circuit system including a first yoke, a first magnetic steel, a second magnetic steel with a spacer ring arranged on the outside of the first magnetic steel and forming a first magnetic gap, a second magnetic yoke fixed to the first magnetic steel, and a third magnetic steel fixed to the second magnetic yoke and in a ring shape, the second yoke comprising an extension arm bent and extending to the inside of the third magnetic steel and spaced from the third magnetic steel to form a second magnetic gap, the first voice coil is inserted in the first magnetic gap, the second voice coil is inserted in the second magnetic gap, the first sound unit surrounds the outside of the second sound unit, and the second diaphragm is located on the side of the first diaphragm close to the magnetic circuit system, which makes full use of the space under the first diaphragm, improves space utilization, effectively reduces the axial height of the coaxial earphone core, and enhances product

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Headphones And Earphones (AREA)

Abstract

本实用新型提供的同轴耳机芯，其包括第一盆架、第二盆架、磁路系统以及同轴设置的第一发声单元和第二发声单元，所述第一发声单元包括第一振膜，所述第二发声单元包括第二振膜，所述磁路系统包括第一磁轭、第一磁钢、间隔环设于所述第一磁钢外侧并形成第一磁间隙的第二磁钢；所述磁路系统还包括固定于所述第一磁钢的第二磁轭以及固定于所述第二磁轭且呈环形的第三磁钢；所述第二磁轭包括弯折延伸至所述第三磁钢内且呈环形的延伸壁，所述延伸壁与所述第三磁钢间隔形成第二磁间隙，所述第二振膜位于所述第一振膜沿振动方向靠近所述磁路系统的一侧。本实用新型的同轴耳机芯降低了产品轴向高度，提升了第一振膜的振动面积，从而提升了音效。

Description

同轴耳机芯 技术领域
本实用新型涉及电声转换领域，尤其涉及一种同轴耳机芯。
 背景技术
近年来随着移动通信技术的快速发展，消费者越来越多地使用带有语音功能的移动通讯设备，而耳机也成为了人们日常生活及工作中必不可少的通讯设备之一，人们不但要求其外观小巧精细，佩戴方便，更加要求其音质好，有立体感。因此对进一步提高耳机的性能及内部结构的更加合理设计成了当下值得研究的课题。
 技术问题
相关技术中的耳机芯中一般设有一个磁路系统，其用于提供中低音的音效，如需同时提供高音音效，则需设置两个同轴的磁路系统和振动系统，而两个磁路系统的重叠增加了耳机芯在轴向的高度，使其安装不便，降低了产品的适用性，不利于现有耳机轻薄化的发展趋势；此外，现有同轴耳机芯中，其中一个振动系统的振膜环绕在另一个振动系统的振膜的外侧，使得在外侧的振膜有效的振动面积减小，一定程度上降低了耳机芯的音效。
因此，有必要提处一种新的耳机芯来解决上述问题。
 技术解决方案
本实用新型的目的在于提供一种音效更好的耳机芯。
为了达到上述目的，本实用新型提出了一种同轴耳机芯，其包括第一盆架、第二盆架、磁路系统以及同轴设置的第一发声单元和第二发声单元，所述第一盆架环设于所述第二盆架外侧，所述第一发声单元环设于所述第二发声单元的周侧，所述第一发声单元包括第一振膜和固定于所述第一振膜的第一音圈，所述第一振膜的外侧固定于所述第一盆架，所述第二发声单元包括第二振膜和固定于所述第二振膜的第二音圈，所述磁路系统包括固定于所述第一盆架的第一磁轭、固定于所述第一磁轭的第一磁钢、间隔环设于所述第一磁钢外侧并形成第一磁间隙的第二磁钢，所述第一音圈插设于所述第一磁间隙；所述磁路系统还包括固定于所述第一磁钢远离所述第一磁轭的表面的第二磁轭以及固定于所述第二磁轭且呈环形的第三磁钢，所述第二盆架固定于所述第三磁钢远离所述第二磁轭的表面，所述第二振膜固定于所述第二盆架；所述第二磁轭包括弯折延伸至所述第三磁钢内且呈环形的延伸壁，所述延伸壁与所述第三磁钢间隔形成第二磁间隙，所述第二音圈插设于所述第二磁间隙，所述第二振膜位于所述第一振膜沿振动方向靠近所述磁路系统的一侧。
优选的，所述第一振膜包括位于中间位置且呈环形的第一内振膜、环绕所述第一内振膜的第一球顶、环绕所述第一球顶的第一骨架以及环绕所述第一骨架的第一外振膜，所述第二振膜位于所述第一内振膜沿振动方向靠近所述磁路系统的一侧。
优选的，所述同轴耳机芯还包括盖设于所述第二振膜上方的前盖，所述第一内振膜的内侧固定于所述前盖。
优选的，所述前盖上设有沿振动方向贯穿其上的出声口，所述出声口与所述第二振膜相对设置。
优选的，所述前盖包括环设于所述第二盆架外侧的外边缘、位于所述第二振膜上方并围设形成所述出声口的内边缘以及连接所述内边缘和所述外边缘的中间部，所述外边缘固定于所述第三磁钢远离所述第二磁轭的表面。
优选的，所述第一内振膜的内侧固定于所述中间部。
优选的，所述第一音圈固定于所述第一骨架朝向所述第一磁间隙的表面。
优选的，所述第一球顶包括与所述第一内振膜外侧连接的第一连接部、与所述第一骨架连接的第二连接部以及连接所述第一连接部与所述第二连接部的延伸部，所述延伸部自所述第二连接部朝向所述第一连接部且远离所述第二振膜的方向延伸。
优选的，所述前盖的所述内边缘自所述中间部向远离所述第二振膜的方向弯折延伸至所述第一内振膜内侧，所述第一内振膜的内侧环绕所述内边缘。
优选的，所述同轴耳机芯还包括固定于所述磁路系统的支撑件，所述第一磁轭上设有沿振动方向贯穿其上的第一通孔，所述支撑件包括收容于所述第一通孔且固定于所述第一磁轭的第一支撑部、自所述第一支撑部朝向所述第二振膜延伸的第二支撑部、自所述第二支撑部朝向所述第二振膜延伸的第三支撑部，所述第二支撑部延伸至所述第一磁钢内，所述第三支撑部延伸至所述第二磁轭的所述延伸壁内。
 有益效果
与相关技术相比，本实用新型提供的耳机芯中，磁路系统包括第一磁轭、第一磁钢、间隔环设于第一磁钢外侧并形成第一磁间隙的第二磁钢，固定于第一磁钢的第二磁轭以及固定于所述第二磁轭且呈环形的第三磁钢，第二磁轭包括弯折延伸至第三磁钢内侧并与第三磁钢间隔形成第二磁间隙的延伸臂，第一音圈插设于第一磁间隙，第二音圈插设于第二磁间隙，第一发声单元环绕于第二发声单元外侧，且第二振膜位于第一振膜靠近磁路系统的一侧，充分利用了第一振膜下方的空间，提升了空间利用率，有效降低了同轴耳机芯的轴向高度，增强了产品适用性；且无需牺牲第一振膜的面积而使其具有足够的振动面积，有效提升了同轴耳机芯的音效。
 附图说明
为了更清楚地说明本实用新型实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1是本实用新型中耳机芯的立体图；
图2是本实用新型中耳机芯的爆炸图；
图3是图1中沿A-A线的剖视图；
图4是图3中B部分的放大图；
图5是图3中C部分的放大图。
 本发明的最佳实施方式
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述。
如图1-图5所示，本实用新型提供了一种同轴耳机芯100，其包括第一盆架1、第二盆架2、磁路系统3以及同轴设置的第一发声单元4和第二发声单元5，所述第一盆架1环设于所述第二盆架2外侧，所述第一发声单元4环设于所述第二发声单元5的周侧。
所述第一发声单元4包括第一振膜41和固定于所述第一振膜41的第一音圈42，所述第一振膜41的外侧固定于所述第一盆架1；所述第一音圈42驱动所述第一振膜41振动发声。所述第二发声单元5包括第二振膜51和固定于所述第二振膜51的第二音圈52；所述第二音圈52驱动所述第二振膜51振动发声。在本实用新型中，所述第一发声单元4为中低音发声单元，提供中低音音效；所述第二发声单元5为高音发声单元，提供高音音效；由此，所述同轴耳机芯100为全频段耳机芯，可提供全频段的高品质音效。
所述磁路系统3包括固定于所述第一盆架1的第一磁轭31、固定于所述第一磁轭31的第一磁钢32、间隔环设于所述第一磁钢32外侧并形成第一磁间隙33的第二磁钢34；其中，所述第一音圈42插设于所述第一磁间隙33。进一步的，所述磁路系统3还包括固定于所述第一磁钢32远离所述第一磁轭31的表面的第二磁轭35以及固定于所述第二磁轭35且呈环形的第三磁钢36，所述第二盆架2固定于所述第三磁钢36远离所述第二磁轭35的表面，所述第二振膜51固定于所述第二盆架2；所述第二磁轭35包括弯折延伸至所述第三磁钢36内且呈环形的延伸壁351，所述延伸壁351与所述第三磁钢36间隔形成第二磁间隙37，所述第二音圈52插设于所述第二磁间隙37，所述第二振膜51位于所述第一振膜41沿振动方向靠近所述磁路系统3的一侧。
具体的，所述第一振膜41包括位于中间位置且呈环形的第一内振膜411、环绕所述第一内振膜411的第一球顶412、环绕所述第一球顶412的第一骨架413以及环绕所述第一骨架413的第一外振膜414，所述第二振膜51位于所述第一内振膜411沿振动方向靠近所述磁路系统3的一侧，所述第一音圈42固定于所述第一骨架413朝向所述第一磁间隙33的表面。进一步的，所述第一球顶412包括与所述第一内振膜411外侧连接的第一连接部4121、与所述第一骨架413连接的第二连接部4122以及连接所述第一连接部4121与所述第二连接部4122的延伸部4123，所述延伸部4123自所述第二连接部4122朝向所述第一连接部4121且远离所述第二振膜51的方向延伸。由此，所述第二发声单元5设置于所述第一发声单元4的第一振膜41下方，充分利用了所述第一振膜41下方本身的空间，提升了空间利用率，有效降低了所述同轴耳机芯100的轴向高度，增强了产品适用性。此外，由于所述第二振膜51设于所述第一振膜41下方，无需牺牲所述第一振膜41的面积，从而保证所述第一振膜41具有足够的振动面积，有效提升了所述耳机芯100的音效。
所述同轴耳机芯100还包括盖设于所述第二振膜51上方的前盖6，所述第一内振膜411的内侧固定于所述前盖6。可以理解的是，所述前盖6上设有沿振动方向贯穿其上的出声口61，所述出声口61与所述第二振膜51相对设置，所述第二振膜51发出的声波通过所述出声口61传递至外界。
具体的，所述前盖6包括环设于所述第二盆架2外侧的外边缘62、位于所述第二振膜51上方并围设形成所述出声口61的内边缘63以及连接所述内边缘63和所述外边缘62的中间部64，所述外边缘62固定于所述第三磁钢36远离所述第二磁轭35的表面，所述第一内振膜411的内侧固定于所述中间部64。进一步的，所述前盖6的所述内边缘63自所述中间部64向远离所述第二振膜51的方向弯折延伸至所述第一内振膜411内侧，所述第一内振膜411的内侧环绕所述内边缘63。
进一步的，所述同轴耳机芯100还包括固定于所述磁路系统3的支撑件7，所述第一磁轭31上设有沿振动方向贯穿其上的第一通孔311，所述支撑件7包括收容于所述第一通孔311且固定于所述第一磁轭31的第一支撑部71、自所述第一支撑部71朝向所述第二振膜51延伸的第二支撑部72、自所述第二支撑部72朝向所述第二振膜51延伸的第三支撑部73，所述第二支撑部72延伸至所述第一磁钢32内，所述第三支撑部73延伸至所述第二磁轭35的所述延伸壁351内；可以理解的是，所述第三支撑部73沿振动方向与所述第二振膜51相对间隔设置。
与相关技术相比，本实用新型提供的耳机芯与相关技术相比，本实用新型提供的耳机芯中，磁路系统包括第一磁轭、第一磁钢、间隔环设于第一磁钢外侧并形成第一磁间隙的第二磁钢，固定于第一磁钢的第二磁轭以及固定于所述第二磁轭且呈环形的第三磁钢，第二磁轭包括弯折延伸至第三磁钢内侧并与第三磁钢间隔形成第二磁间隙的延伸臂，第一音圈插设于第一磁间隙，第二音圈插设于第二磁间隙，第一发声单元环绕于第二发声单元外侧，且第二振膜位于第一振膜靠近磁路系统的一侧，充分利用了第一振膜下方的空间，提升了空间利用率，有效降低了同轴耳机芯的轴向高度，增强了产品适用性；且无需牺牲第一振膜的面积而使其具有足够的振动面积，有效提升了同轴耳机芯的音效。
以上所述的仅是本实用新型的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本实用新型创造构思的前提下，还可以做出改进，但这些均属于本实用新型的保护范围。

Claims (10)

  1. 一种同轴耳机芯，其包括第一盆架、第二盆架、磁路系统以及同轴设置的第一发声单元和第二发声单元，所述第一盆架环设于所述第二盆架外侧，所述第一发声单元环设于所述第二发声单元的周侧，所述第一发声单元包括第一振膜和固定于所述第一振膜的第一音圈，所述第一振膜的外侧固定于所述第一盆架，所述第二发声单元包括第二振膜和固定于所述第二振膜的第二音圈，其特征在于，所述磁路系统包括固定于所述第一盆架的第一磁轭、固定于所述第一磁轭的第一磁钢、间隔环设于所述第一磁钢外侧并形成第一磁间隙的第二磁钢，所述第一音圈插设于所述第一磁间隙；所述磁路系统还包括固定于所述第一磁钢远离所述第一磁轭的表面的第二磁轭以及固定于所述第二磁轭且呈环形的第三磁钢，所述第二盆架固定于所述第三磁钢远离所述第二磁轭的表面，所述第二振膜固定于所述第二盆架；所述第二磁轭包括弯折延伸至所述第三磁钢内且呈环形的延伸壁，所述延伸壁与所述第三磁钢间隔形成第二磁间隙，所述第二音圈插设于所述第二磁间隙，所述第二振膜位于所述第一振膜沿振动方向靠近所述磁路系统的一侧。
  2. 根据权利要求1所述的同轴耳机芯，其特征在于，所述第一振膜包括位于中间位置且呈环形的第一内振膜、环绕所述第一内振膜的第一球顶、环绕所述第一球顶的第一骨架以及环绕所述第一骨架的第一外振膜，所述第二振膜位于所述第一内振膜沿振动方向靠近所述磁路系统的一侧。
  3. 根据权利要求2所述的同轴耳机芯，其特征在于，所述同轴耳机芯还包括盖设于所述第二振膜上方的前盖，所述第一内振膜的内侧固定于所述前盖。
  4. 根据权利要求3所述的耳机芯，其特征在于，所述前盖上设有沿振动方向贯穿其上的出声口，所述出声口与所述第二振膜相对设置。
  5. 根据权利要求4所述的同轴耳机芯，其特征在于，所述前盖包括环设于所述第二盆架外侧的外边缘、位于所述第二振膜上方并围设形成所述出声口的内边缘以及连接所述内边缘和所述外边缘的中间部，所述外边缘固定于所述第三磁钢远离所述第二磁轭的表面。
  6. 根据权利要求5所述的同轴耳机芯，其特征在于，所述第一内振膜的内侧固定于所述中间部。
  7. 根据权利要求6所述的同轴耳机芯，其特征在于，所述第一音圈固定于所述第一骨架朝向所述第一磁间隙的表面。
  8. 根据权利要求2所述的同轴耳机芯，其特征在于，所述第一球顶包括与所述第一内振膜外侧连接的第一连接部、与所述第一骨架连接的第二连接部以及连接所述第一连接部与所述第二连接部的延伸部，所述延伸部自所述第二连接部朝向所述第一连接部且远离所述第二振膜的方向延伸。
  9. 根据权利要求5所述的耳机芯，其特征在于，所述前盖的所述内边缘自所述中间部向远离所述第二振膜的方向弯折延伸至所述第一内振膜内侧，所述第一内振膜的内侧环绕所述内边缘。
  10. 根据权利要求1所述的同轴耳机芯，其特征在于，所述同轴耳机芯还包括固定于所述磁路系统的支撑件，所述第一磁轭上设有沿振动方向贯穿其上的第一通孔，所述支撑件包括收容于所述第一通孔且固定于所述第一磁轭的第一支撑部、自所述第一支撑部朝向所述第二振膜延伸的第二支撑部、自所述第二支撑部朝向所述第二振膜延伸的第三支撑部，所述第二支撑部延伸至所述第一磁钢内，所述第三支撑部延伸至所述第二磁轭的所述延伸壁内。
PCT/CN2022/136717 2022-12-06 2022-12-06 同轴耳机芯 WO2024119340A1 (zh)

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