WO2022166389A1 - 发声单元、发声模组和耳机 - Google Patents

发声单元、发声模组和耳机 Download PDF

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Publication number
WO2022166389A1
WO2022166389A1 PCT/CN2021/136415 CN2021136415W WO2022166389A1 WO 2022166389 A1 WO2022166389 A1 WO 2022166389A1 CN 2021136415 W CN2021136415 W CN 2021136415W WO 2022166389 A1 WO2022166389 A1 WO 2022166389A1
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WO
WIPO (PCT)
Prior art keywords
sound
diaphragm
earphone
generating unit
washer
Prior art date
Application number
PCT/CN2021/136415
Other languages
English (en)
French (fr)
Inventor
王莹
郭晓冬
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歌尔股份有限公司
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Filing date
Publication date
Application filed by 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Publication of WO2022166389A1 publication Critical patent/WO2022166389A1/zh

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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
    • 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
    • H04R7/04—Plane diaphragms
    • 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
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • 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 utility model relates to the technical field of electro-acoustic conversion, in particular to a sound producing unit, a sound producing module and an earphone.
  • a loudspeaker is provided with an elastic diaphragm, and the diaphragm vibrates to produce sound.
  • the diaphragm is generally made of non-metallic materials such as rubber or paper.
  • the diaphragm includes a ball top, a folded ring portion and a fixed portion in sequence from the inside to the outside.
  • the folded ring portion is a convex structure extending from the edge of the ball top.
  • the existing diaphragm material and structure limit the effective frequency bandwidth of the loudspeaker, and cannot meet the increasing hearing requirements of users.
  • the main purpose of the utility model is to provide a sound-generating unit, a sound-generating module and an earphone, which aim to solve the technical problem that the existing diaphragm material and structure limit the effective frequency bandwidth of the speaker.
  • the sound generating unit provided by the present invention includes a magnetic yoke, a vibration system and a magnetic circuit system arranged on the magnetic yoke, and the vibration system includes a magnetic circuit system arranged on the magnetic circuit system away from the magnetic yoke.
  • the diaphragm is a single-layer metal layer.
  • the diaphragm includes a metal layer and a damping layer disposed outside the metal layer.
  • the thickness of the diaphragm is 10-40 ⁇ m.
  • the elastic modulus of the diaphragm is greater than or equal to 30GPa.
  • the magnetic circuit system includes a main magnet, a secondary magnet arranged around the main magnet, a main washer arranged on the main magnet, and a secondary washer arranged on the secondary magnet.
  • the magnetic gap is formed between the main washer and the secondary washer.
  • both the secondary magnetic steel and the secondary washer are annular, and the vibration system further includes a mounting ring arranged on the secondary washer, and the edge of the diaphragm is fixed on the mounting ring. superior.
  • the surface of the secondary washer away from the secondary magnetic steel is recessed to form a first groove and a second groove
  • the mounting ring is arranged outside the first groove
  • the sounding unit further includes a flexible A circuit board, a voice coil lead electrically connecting the flexible circuit board and the voice coil, the voice coil lead is accommodated in the first groove, and one end of the flexible circuit board is accommodated in the second groove Inside.
  • the magnetic yoke includes a bottom plate and a side plate extending from the bottom plate, and two opposite ends of the secondary magnetic steel are recessed to form fixing grooves matched with the side plate.
  • the bottom plate, the main magnet steel and the main washer are all provided with through holes, and a plurality of the through holes are connected in sequence to form an air flow channel, and the diaphragm and the main washer are connected between the diaphragm and the main washer.
  • the gap communicates with the airflow channel.
  • the utility model also provides a sound-generating module, which is characterized by comprising a first sound-generating unit, a second sound-generating unit, a housing with a receiving space, and a spacer set in the housing, the spacer
  • the accommodation space is divided into a first space and a second space, the first sound-emitting unit is arranged in the first space, the second sound-emitting unit is arranged in the second space, and the first sound-emitting unit is as described above sound unit.
  • the first sound generating unit and the second sound generating unit are disposed opposite to each other, and the second sound generating unit is a bass unit.
  • the utility model also provides an earphone, which comprises an earphone casing and the above-mentioned sound-emitting module arranged in the earphone casing.
  • the earphone shell includes a sound outlet pipe, a receiving pipe and an earphone back shell which are connected in sequence, and the sound generating module is arranged in the receiving pipe.
  • the flat metal diaphragm is arranged, so that the sound-emitting unit provided with the diaphragm has a larger frequency bandwidth in the high-frequency part; since the diaphragm is flat, the whole machine where the sound-emitting unit is arranged does not need to be reserved. Avoid the space of the folding ring structure to make the product size smaller; by setting the metal diaphragm, the sound has a metallic texture, providing users with different hearing experiences.
  • FIG. 1 is a schematic three-dimensional structure diagram of an embodiment of a sound-emitting unit of the present invention
  • FIG. 2 is a schematic diagram of a disassembled structure of an embodiment of a sound-emitting unit of the present invention
  • FIG. 3 is a schematic cross-sectional structure diagram of an embodiment of a sound-emitting unit of the present invention.
  • Fig. 4 is the frequency response curve diagram of the sound-emitting unit of the present invention.
  • FIG. 5 is a schematic three-dimensional structure diagram of an embodiment of a sound module of the present invention.
  • FIG. 6 is a schematic diagram of a disassembled structure of an embodiment of a sound module of the present invention.
  • FIG. 7 is a schematic cross-sectional structure diagram of an embodiment of a sound module of the present invention.
  • FIG. 8 is a schematic cross-sectional structure diagram of an embodiment of the earphone of the present invention.
  • the utility model provides a sounding unit 10 .
  • the sound generating unit 10 includes a magnetic yoke 1, a vibration system 3 and a magnetic circuit system 5 arranged on the magnetic yoke 1
  • the vibration system 3 includes a diaphragm arranged on the side of the magnetic circuit system 5 away from the magnetic yoke 1 31 and a voice coil 33 that drives the vibrating diaphragm 31, the voice coil 33 is inserted into the magnetic gap of the magnetic circuit system 5, and the diaphragm 31 is a flat metal diaphragm.
  • FIG. 4 is a frequency response curve diagram of the sounding unit 10 according to an embodiment of the present invention, wherein the curve L1 is the frequency response curve of the sounding unit 10 shown in FIG. 1 , the curve L2 is the frequency response curve of the comparative example,
  • the comparative example is a sounding unit having a diaphragm 31 with a rubber ring structure. It can be seen from FIG. 4 that in the high frequency part, the sound generating unit 10 provided by the present invention has a larger frequency bandwidth.
  • the sound-emitting unit 10 provided with the diaphragm 31 has a larger frequency bandwidth in the high-frequency part;
  • the whole machine does not need to reserve space to avoid the folding ring structure, so that the product size is smaller;
  • the metal diaphragm 31 the sound has a metallic texture, providing users with different hearing experiences.
  • the diaphragm 31 is a single-layer metal layer, and the metal layer is made of an alloy material, preferably a magnesium-aluminum alloy.
  • the diaphragm 31 includes a metal layer and a damping layer disposed outside the metal layer.
  • the metal layer may be one or more of metal materials such as magnesium-lithium alloy, magnesium-aluminum alloy, aluminum film, titanium film, stainless steel, silicon steel, etc., preferably magnesium-aluminum alloy.
  • the damping layer can be an adhesive film layer, PEEK, TPU, TPEE, etc.
  • the damping property of the diaphragm 313 can be adjusted by the damping layer, which is beneficial to the balance of the vibration of the diaphragm 313 and brings a more delicate hearing.
  • the elastic modulus of the diaphragm 31 provided in this embodiment is greater than or equal to 30GPa, and the thickness is 10-40um, which can replace the rubber diaphragm or paper diaphragm in the prior art and provide users with different choices.
  • the diaphragm 31 and the voice coil 33 are coaxially arranged, and those skilled in the art can select the voice coil 33 and the diaphragm 31 with different diameter ratios according to actual needs to obtain different sound quality.
  • the magnetic circuit system 5 includes a main magnet 51 , a secondary magnet 53 arranged around the main magnet 51 , a main washer 55 arranged on the main magnet 51 , and a secondary magnet 53 arranged on the secondary magnet 53 .
  • a magnetic gap is formed between the deputy washer 57, the main washer 55 and the deputy washer 57.
  • the secondary magnetic steel 53 and the secondary washer 57 are both annular, and are respectively arranged around the main magnetic steel 51 and the main washer 55 .
  • there may be multiple secondary magnets 53 and secondary washers 57 and the multiple secondary washers 57 are arranged in sequence to surround the main magnet 51 .
  • the vibration system 3 further includes a mounting ring 35 arranged on the sub-wafer 57 , and the edge of the diaphragm 31 is fixed on the mounting ring 35 .
  • the edge of the diaphragm 31 can be connected to the mounting ring 35, and then the mounting ring 35 can be set on the vice washer 57.
  • the diaphragm 31 can be adjusted. Get different sized vibration spaces.
  • the surface of the secondary washer 57 away from the secondary magnetic steel 53 is recessed to form a first groove 571 and a second groove 573
  • the mounting ring 35 is arranged outside the first groove 571
  • the sounding unit 10 further includes a flexible circuit board 7 .
  • the voice coil lead (not shown) electrically connecting the flexible circuit board and the voice coil 33 , the voice coil lead is glued and fixed in the first groove 571 , and one end of the flexible circuit board 7 is accommodated in the second groove 573 .
  • one end of the first groove 571 communicates with the magnetic gap
  • the other end of the first groove 571 communicates with the second groove 573 .
  • the number of the first grooves 571 is two, and the two first grooves 571 are symmetrically arranged on both sides of the main washer 55 .
  • the second groove 573 is disposed at one end of the annular auxiliary washer 57 .
  • the first end of the flexible circuit board 7 provided with two pads is accommodated in the second groove 573 , and the two pads are respectively electrically connected to the voice coil 33 .
  • the flexible circuit board 7 passes through the gap between the mounting ring 35 and the secondary washer 57 , so that one end of the flexible circuit board 7 is disposed on the outer side of the secondary washer 57 away from the main washer 55 .
  • the magnetic yoke 1 includes a bottom plate 11 and a side plate 13 extending from the bottom plate 11 .
  • the opposite ends of the secondary magnetic steel 53 are recessed to form fixing grooves 531 for matching with the side plate 13 .
  • Fixing the secondary magnetic steel 53 through the side plate 13 is beneficial to increase the size of the secondary magnetic steel 53 , thereby increasing the magnetic flux of the magnetic circuit system 5 .
  • the bottom plate 11 , the main magnetic steel 51 and the main washer 55 are all provided with through holes.
  • the plurality of through holes are connected in sequence to form an air flow channel 52 .
  • the gap between the diaphragm 31 and the main washer 55 is communicated with the air flow channel 52 .
  • the airflow generated by the vibration of the diaphragm 31 can be leaked out through the airflow channel 52 , which is beneficial to the vibration of the diaphragm 31 .
  • the present invention also provides a sound-generating module 200 , which includes a first sound-generating unit 20 , a second sound-generating unit 30 , a housing 40 with a receiving space, and a spacer 50 disposed in the housing 40 .
  • the spacer 50 divides the receiving space into a first space and a second space
  • the first sound-emitting unit 20 is arranged in the first space
  • the second sound-emitting unit 30 is arranged in the second space
  • the first sound-emitting unit 20 emits sound as described above unit 10.
  • the specific structure of the first sound generating unit 20 refers to the above-mentioned embodiments. Since the sound-emitting module 200 adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments. I won't repeat them one by one.
  • the second sound generating unit 30 includes a bass magnetic circuit 301 with a magnetic gap, a bass diaphragm 303, and a bass voice coil 305 connected to the bass diaphragm 303.
  • the bass voice coil 305 is inserted into the magnetic gap.
  • the bass diaphragm 303 includes a main body part, a folding ring part and a fixing part arranged in sequence from the inside to the outside, and the bass diaphragm 303 may be a rubber diaphragm. That is, in the sound-generating module 200 , the first sound-generating unit 20 is used to emit high-pitched parts, and the second sound-generating unit 30 is used to emit low-pitched parts, thereby further increasing the overall bandwidth of the sound-generating module 200 .
  • the present invention further provides an earphone 300 .
  • the earphone 300 includes an earphone housing 310 as described above for the sound-emitting module 200 .
  • the specific structures of the sounding unit 10 and the sounding module 200 refer to the above-mentioned embodiments. Since the earphone adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments. I won't repeat them one by one.
  • the earphone housing 310 includes a sound outlet tube 320, a accommodating tube 330 and an earphone rear shell 340 which are connected in sequence, and the sound-emitting module 200 is arranged in the accommodating tube 330.
  • a rubber plug adapted to the ear canal is further provided on the outside of the sound outlet tube 320 or the receiving tube 330 .
  • the sound module 200 is arranged in the accommodating tube 330 so as to obtain a larger space in the back cavity, and other components can be arranged in the back shell 340 of the earphone.
  • a high-pitched vibration space is formed between the diaphragm 31 and the spacer 50
  • a low-frequency vibration space is formed between the bass diaphragm 303 of the second sound generating unit 30 and the spacer 50
  • the casing 40 is provided with a space for vibration.
  • a sound outlet 401 communicated with the treble vibration space and/or the bass vibration space.

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

Abstract

本申请公开一种发声单元、发声模组和耳机，所述发声单元包括磁轭、振动系统和设于所述磁轭上的磁路系统，所述振动系统包括设于所述磁路系统远离所述磁轭一侧的振膜和驱动所述振膜振动的音圈，所述音圈插入所述磁路系统的磁间隙，所述振膜为平板状的金属振膜。本申请公开的发声单元高频频宽高、音质好。

Description

发声单元、发声模组和耳机 技术领域
本实用新型涉及电声转换技术领域，特别涉及一种发声单元、发声模组和耳机。
背景技术
现有技术中，扬声器内设置具有弹性的振膜，振膜振动发声。振膜一般为橡胶或纸质等非金属材质制成，振膜由内至外依次包括球顶部、折环部和固定部，折环部为自球顶部边沿延伸的凸起结构。而现有的振膜材质和结构限制了扬声器的有效频宽，无法满足用户日益增长的听觉要求。
因此，需要提供一种新型的发声单元，解决上述技术问题。
实用新型内容
本实用新型的主要目的是提供一种发声单元、发声模组和耳机，旨在解决现有现有的振膜材质和结构限制了扬声器有效频宽的技术问题。
为实现上述目的，本实用新型提供的所述发声单元包括磁轭、振动系统和设于所述磁轭上的磁路系统，所述振动系统包括设于所述磁路系统远离所述磁轭一侧的振膜和驱动所述振膜振动的音圈，所述音圈插入所述磁路系统的磁间隙，所述振膜为平板状的金属振膜。
可选地，振膜为单层金属层。
可选地，所述振膜包括金属层和设于所述金属层外侧的阻尼层。
可选地，所述振膜的厚度为10～40μm。
可选地，所述振膜的弹性模量大于或等于30GPa。
可选地，所述磁路系统包括主磁钢、绕所述主磁钢设置的副磁钢、设于所述主磁钢上的主华司和设于所述副磁钢上的副华司，所述主华司和所述副华司之间形成所述磁间隙。
可选地，所述副磁钢和所述副华司均为环形，所述振动系统还包括设于所述副华司上的安装环，所述振膜的边沿固设于所述安装环上。
可选地，所述副华司远离所述副磁钢的表面凹陷形成第一凹槽和第二凹槽，所述安装环设于所述第一凹槽外侧，所述发声单元还包括柔性电路板、电连接所述柔性电路板和所述音圈的音圈引线，所述音圈引线收容于所述第一凹槽内，所述柔性电路板的一端收容于所述第二凹槽内。
可选地，所述磁轭包括底板和自所述底板延伸的侧板，所述副磁钢的相对两端凹陷形成与所述侧板配合的固定槽。
可选地，所述底板、所述主磁钢和所述主华司上均开设有通孔，多个所述通孔依次连通形成气流通道，所述振膜和所述主华司之间的间隙与所述气流通道连通。
本实用新型还提供了一种发声模组，其特征在于，包括第一发声单元、第二发声单元、具有收容空间的外壳和设于所述外壳内的隔架，所述隔架将所述收容空间分割为第一空间和第二空间，所述第一发声单元设于所述第一空间内，所述第二发声单元设于所述第二空间内，所述第一发声单元如上述的发声单元。
可选地，所述第一发声单元和所述第二发声单元相对设置，所述第二发声单元为低音单元。
本实用新型还提供了一种耳机，所述耳机包括耳机壳体和设于所述耳机壳体内如上述的发声模组。
可选地，所述耳机壳体包括依次连接的出音管、收容管和耳机后壳，所述发声模组设于所述收容管内。
本实用新型中通过设置平板状的金属振膜，使得设置该振膜的发声单元在高频部分具有更大的频宽；由于振膜为平板状，使得设置该发声单元的整机不用预留避让折环结构的空间，使得产品尺寸更小；通过设置金属振膜，使得发声具有金属质感，为用户提供不同听觉感受。
附图说明
为了更清楚地说明本实用新型实施例或现有技术中的技术方案，下面将对实施例或现有技术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示出的结构获 得其他的附图。
图1为本实用新型发声单元一实施例的立体结构示意图；
图2为本实用新型发声单元一实施例的拆解结构示意图；
图3为本实用新型发声单元一实施例的剖面结构示意图；
图4为本实用新型发声单元的频响曲线图；
图5为本实用新型发声模组一实施例的立体结构示意图；
图6为本实用新型发声模组一实施例的拆解结构示意图；
图7为本实用新型发声模组一实施例的剖面结构示意图；
图8为本实用新型耳机一实施例的剖面结构示意图。
实施例附图标号说明：
标号 名称 标号 名称
10 发声单元 1 磁轭
11 底板 13 侧板
3 振动系统 31 振膜
33 音圈 35 安装环
5 磁路系统 51 主磁钢
52 气流通道 53 副磁钢
531 固定槽 55 主华司
57 副华司 571 第一凹槽
573 第二凹槽 7 柔性电路板
200 发声模组 20 第一发声单元
30 第二发声单元 301 低音磁路
303 低音振膜 305 低音音圈
40 外壳 401 出音孔
50 隔架 320 出音管
310 耳机壳体 340 耳机后壳
330 收容管 300 耳机
本实用新型目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
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，显然，所描述的实施例仅仅是本实用新型的一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的范围。
需要说明，本实用新型实施例中所有方向性指示(诸如上、下、左、右、前、后……)仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，在本实用新型中涉及“”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本实用新型要求的保护范围之内。
本实用新型提出一种发声单元10。
参照图1至图3，发声单元10包括磁轭1、振动系统3和设于磁轭1上的磁路系统5，振动系统3包括设于磁路系统5远离磁轭1一侧的振膜31和驱动振膜31振动的音圈33，音圈33插入磁路系统5的磁间隙，振膜31为平板状的金属振膜。
音圈33通电时，在磁间隙内的磁场作用下，音圈33振动，以带动振膜31振动发声。请参阅图4，为本实用新型一实施例的发声单元10的频响曲线图，其中，曲线L1为图1所示的发声单元10的频响曲线，曲线L2为对比例的频响曲线，该对比例与图1所示的发声单元10的不同之处在于，对比例为具有橡胶折环结构的振膜31的发声单元。由图4可知，在高频部分，本实用新型提供的发声单元10具有更大的频宽。
本实用新型中，通过设置平板状的金属振膜，使得设置该振膜31的发声单元10在高频部分具有更大的频宽；由于振膜31为平板状，使得设置该发声单元10的整机不用预留避让折环结构的空间，使得产品尺寸更小；通过设置金属振膜31，使得发声具有金属质感，为用户提供不同听觉感受。
在一实施例中，振膜31为单层金属层，该金属层由合金材料制成，优选为镁铝合金。
另一实施例中，振膜31包括金属层和设于金属层外侧的阻尼层。金属层具体可以是镁锂合金、镁铝合金、铝膜、钛膜、不锈钢、硅钢等金属材料中的一种或多种，优选为镁铝合金。阻尼层可以是胶膜层、PEEK、TPU、TPEE等。通过阻尼层可以调节振膜313的阻尼性，有利于振膜313振动的平衡，带来更加细腻的听感。
本实施例中提供的振膜31的弹性模量大于或等于30GPa，厚度为10～40um，可取代现有技术中的橡胶振膜或纸质振膜，为用户提供不同选择。振膜31和音圈33同轴设置，本领域技术人员可以根据实际需要选择不同直径比值的音圈33和振膜31，以获得不同音质。
请参阅图1至图3，磁路系统5包括主磁钢51、绕主磁钢51设置的副磁钢53、设于主磁钢51上的主华司55和设于副磁钢53上的副华司57，主华司55和副华司57之间形成磁间隙。
在本实施例中，副磁钢53和副华司57均为环形，分别绕主磁钢51和主华司55设置。在其他实施例中，副磁钢53和副华司57可以为多个，多个副华司57依次排列环绕主磁钢51。振动系统3还包括设于副华司57上的安装环35，振膜31的边沿固设于安装环35上。装配时，可将振膜31的边沿与安装环35连接，再将安装环35设置于副华司57上，可通过改变安装环35沿音圈33振动方向的高度大小，以使振膜31获得不同大小的振动空间。
可选地，副华司57远离副磁钢53的表面凹陷形成第一凹槽571和第二凹槽573，安装环35设于第一凹槽571外侧，发声单元10还包括柔性电路板7、电连接所述柔性电路板和音圈33的音圈引线(未标示)，音圈引线涂胶固定于第一凹槽571，柔性电路板7的一端收容于第二凹槽573内。在本实施例中，第一凹槽571的一端连通磁间隙，第一凹槽571的另一端与第二凹槽573相连通。第一凹槽571的数量为两个，两个第一凹槽571对称设置于主华 司55的两侧。第二凹槽573设置于环形副华司57的一端，柔性电路板7设有两个焊盘的第一端收容于第二凹槽573内，两个焊盘分别与音圈33电连接，柔性电路板7穿过安装环35和副华司57之间的间隙，以使柔性电路板7的一端设置于副华司57远离主华司55的外侧。
磁轭1包括底板11和自底板11延伸的侧板13，副磁钢53的相对两端凹陷形成与侧板13配合的固定槽531。通过侧板13固定副磁钢53，有利于增加副磁钢53的尺寸，从而增加磁路系统5的磁通量。
底板11、主磁钢51和主华司55上均开设有通孔，多个通孔依次连通形成气流通道52，振膜31和主华司55之间的间隙与气流通道52连通。振膜31振动产生的气流可通过气流通道52外泄，有利于振膜31振动。
请参阅图5至图7，本实用新型还提供了一种发声模组200，包括第一发声单元20、第二发声单元30、具有收容空间的外壳40和设于外壳40内的隔架50，隔架50将收容空间分割为第一空间和第二空间，第一发声单元20设于第一空间内，第二发声单元30设于第二空间内，第一发声单元20如上述的发声单元10。
该第一发声单元20的具体结构参照上述实施例，由于本发声模组200采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。
第二发声单元30包括具有磁间隙的低音磁路301、低音振膜303以及与低音振膜303连接的低音音圈305，低音音圈305插入磁间隙中。低音振膜303包括由内至外依次设置的主体部、折环部和固定部，低音振膜303可以为橡胶振膜。即在发声模组200中，第一发声单元20用于发出高音部分，第二发声单元30用于发出低音部分，从而进一步增加发声模组200整体的频宽。
请结合参阅图8，本实用新型还提供了一种耳机300，耳机300包括耳机壳体310如上述的发声模组200。该发声单元10和发声模组200的具体结构参照上述实施例，由于本耳机采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。
所述耳机壳体310包括依次连接的出音管320、收容管330和耳机后壳 340，所述发声模组200设于所述收容管330内。在一实施例中，在出音管320或收容管330外侧还设置有与耳道适配的胶塞。本实用新型通过将发声模组200设于收容管330中，从而获得更大的后腔空间，可以在耳机后壳340内设置其他零部件。
所述振膜31和所述隔架50之间形成高音振动空间，所述第二发声单元30的低音振膜303和所述隔架50之间形成低音振动空间，所述外壳40上开设有与所述高音振动空间和/或所述低音振动空间连通的出音孔401。
以上仅为本实用新型的优选实施例，并非因此限制本实用新型的专利范围，凡是在本实用新型的实用新型构思下，利用本实用新型说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本实用新型的专利保护范围内。

Claims (14)

  1. 一种发声单元，其特征在于，所述发声单元包括磁轭、振动系统和设于所述磁轭上的磁路系统，所述振动系统包括设于所述磁路系统远离所述磁轭一侧的振膜和驱动所述振膜振动的音圈，所述音圈插入所述磁路系统的磁间隙，所述振膜为平板状的金属振膜。
  2. 如权利要求1所述的发声单元，其特征在于，所述振膜为单层金属层。
  3. 如权利要求1所述的发声单元，其特征在于，所述振膜包括金属层和设于所述金属层外侧的阻尼层。
  4. 如权利要求1所述的发声单元，其特征在于，所述振膜的厚度为10～40μm。
  5. 如权利要求1所述的发声单元，其特征在于，所述振膜的弹性模量大于或等于30GPa。
  6. 如权利要求1至5中任一项所述的发声单元，其特征在于，所述磁路系统包括主磁钢、绕所述主磁钢设置的副磁钢、设于所述主磁钢上的主华司和设于所述副磁钢上的副华司，所述主华司和所述副华司之间形成所述磁间隙。
  7. 如权利要求6所述的发声单元，其特征在于，所述副磁钢和所述副华司均为环形，所述振动系统还包括设于所述副华司上的安装环，所述振膜的边沿固设于所述安装环上。
  8. 如权利要求7所述的发声单元，其特征在于，所述副华司远离所述副磁钢的表面凹陷形成第一凹槽和第二凹槽，所述安装环设于所述第一凹槽外侧，所述发声单元还包括柔性电路板、电连接所述柔性电路板和所述音圈的 音圈引线，所述音圈引线收容于所述第一凹槽内，所述柔性电路板的一端收容于所述第二凹槽内。
  9. 如权利要求6所述的发声单元，其特征在于，所述磁轭包括底板和自所述底板延伸的侧板，所述副磁钢的相对两端凹陷形成与所述侧板配合的固定槽。
  10. 如权利要求9所述的发声单元，其特征在于，所述底板、所述主磁钢和所述主华司上均开设有通孔，多个所述通孔依次连通形成气流通道，所述振膜和所述主华司之间的间隙与所述气流通道连通。
  11. 一种发声模组，其特征在于，包括第一发声单元、第二发声单元、具有收容空间的外壳和设于所述外壳内的隔架，所述隔架将所述收容空间分割为第一空间和第二空间，所述第一发声单元设于所述第一空间内，所述第二发声单元设于所述第二空间内，所述第一发声单元如权利要求1至10中任一项所述的发声单元。
  12. 如权利要求11所述的发声模组，其特征在于，所述第一发声单元和所述第二发声单元相对设置，所述第二发声单元为低音单元。
  13. 一种耳机，其特征在于，所述耳机包括耳机壳体和设于所述耳机壳体内如权利要求11或12所述的发声模组。
  14. 如权利要求13所述的耳机，其特征在于，所述耳机壳体包括依次连接的出音管、收容管和耳机后壳，所述发声模组设于所述收容管内。
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