WO2018132996A1 - 一种微型扬声器 - Google Patents

一种微型扬声器 Download PDF

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Publication number
WO2018132996A1
WO2018132996A1 PCT/CN2017/071658 CN2017071658W WO2018132996A1 WO 2018132996 A1 WO2018132996 A1 WO 2018132996A1 CN 2017071658 W CN2017071658 W CN 2017071658W WO 2018132996 A1 WO2018132996 A1 WO 2018132996A1
Authority
WO
WIPO (PCT)
Prior art keywords
diaphragm
voice coil
washer
magnet
annular step
Prior art date
Application number
PCT/CN2017/071658
Other languages
English (en)
French (fr)
Inventor
袁智杰
郑雷
李园园
Original Assignee
声电电子科技(惠州)有限公司
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 声电电子科技(惠州)有限公司 filed Critical 声电电子科技(惠州)有限公司
Priority to PCT/CN2017/071658 priority Critical patent/WO2018132996A1/zh
Priority to US16/046,989 priority patent/US20180376248A1/en
Publication of WO2018132996A1 publication Critical patent/WO2018132996A1/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
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
    • H04R1/2823—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
    • H04R1/2826—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material for loudspeaker transducers
    • 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
    • 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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/023—Screens for 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
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
    • 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
    • H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
    • 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
    • H04R9/046—Construction

Definitions

  • the utility model relates to the technical field of electroacoustic conversion, in particular to a miniature speaker.
  • the current existing speakers cannot achieve symmetrical bimodal high sound pressure output frequency response at 2500 ⁇ 500 Hz and 8000 ⁇ 500 Hz in a specific frequency, and ensure that the total harmonic distortion of the frequency range of 20 Hz to 20 kHz is within 1.5%.
  • the technical problem to be solved by the utility model is to propose a micro-speaker for an in-ear earphone and having a high frequency band characteristic double peak high sound pressure output frequency response and harmonic distortion within 1.5.
  • a miniature speaker comprising a top open bracket, a T-iron, a magnet, a washer, a diaphragm, a voice coil, a cover and a circuit board, the T-iron installation
  • the magnet is annular and nested on the T-iron
  • the washer is attached to the top of the magnet, the magnet and the inner wall of the washer and the center of the T-iron
  • An annular gap is formed between the outer walls of the column for moving the voice coil up and down
  • an annular step is formed on the inner wall of the bracket and above the washer to connect the diaphragm, the annular step and
  • the height difference between the washers is 0.1 mm-0.8 mm, and the bottom edge of the diaphragm is connected to the top surface of the annular step;
  • the cover is fastened over the diaphragm, and a through hole having a diameter of 1 mm to 3 mm is opened at a center of the cover.
  • the diaphragm is composed of a ball top and a folded portion connected in the circumferential direction of the top of the ball, the top of the voice coil is connected to the bottom of the diaphragm, the top portion of the ball and the folded ring
  • the line shape of the section is a multi-section curved shape.
  • top of the voice coil is connected to the bottom of the joint between the top of the ball and the folding ring portion.
  • the diaphragm is composed of a PAR material layer and a PU material layer, and the top surface of the diaphragm is coated with a metal titanium coating.
  • the voice coil is wound by a copper-clad aluminum enameled wire.
  • a vent hole is defined in a bottom of the bracket, and a tuned mesh cloth is disposed on the vent hole.
  • a ring of copper rings is disposed at an edge of the folded portion, and an edge of the cover is crimped onto the copper ring.
  • the micro-speaker of the utility model optimizes the structure and diaphragm design of the micro-speaker to meet the special requirements of the in-ear earphone output frequency response of the micro-speaker, and also has a dual-peak high-sound pressure output frequency response unique to the high frequency band. In addition, its harmonic distortion is within 1.5.
  • FIG. 1 is a schematic structural view of a microspeaker in the present invention
  • FIG. 2 is a schematic structural view of a diaphragm
  • Figure 3 is a graph showing the frequency response of the microspeaker of the present invention.
  • the microspeaker of the present invention includes a top open bracket 1, a T iron 2, a magnet 3, a washer 4, a diaphragm 5, a voice coil 6, a cover 7, and a circuit board 8.
  • the T iron 2 is installed in the bracket 1, the magnet 3 is annular and sleeved on the T iron 2, the washer 4 is connected on the top of the magnet 3, the magnet 3 and the inner wall of the washer 4 and the center pillar of the T iron 2 An annular gap is formed between the outer walls for moving the voice coil 6 up and down.
  • the diaphragm 5 is composed of a ball top 5-1 and a loop portion 5-2 connected in the circumferential direction of the top 5-1 of the ball.
  • a diaphragm of another configuration may be employed.
  • the voice coil 6 is wound with a copper-clad aluminum enameled wire, and the top of the voice coil 6 is connected to the bottom of the diaphragm 5.
  • the line shape of the 5-1 cross section of the ball and the cross section of the folded ring portion 5-2 are all a plurality of arcs.
  • the multi-segment arc is a three-segment arc, and further, a ribbed annular array may be disposed on the diaphragm 5.
  • An annular step 9 for connecting the diaphragm 5 is formed on the inner wall of the bracket 1 above the washer 4, and the height between the annular step 9 and the washer 4 is 0.1 mm to 0.8 mm.
  • the cover 7 is fastened over the diaphragm 5, and the cover 7 is provided with a through hole 10 having a diameter of 1 mm to 3 mm at a center opposite to the top 5-1 of the ball.
  • the bottom of the bracket 1 is provided with a vent hole, and a tuned mesh cloth 11 is arranged on the vent hole.
  • the diaphragm 5 is a composite of a PAR material layer and a PU material layer, and the top surface of the diaphragm 5 is plated with a titanium metal coating.
  • the top of the voice coil 6 is connected to the bottom of the joint between the ball top 5-1 and the loop portion 5-2.
  • a ring of copper rings 12 is provided at the edge of the loop portion 5-2, and the edge of the cover 7 is crimped onto the copper ring 12.
  • the speaker in the present invention realizes the output of the dual-peak high sound pressure in the high frequency band from the test data, and ensures that the harmonic distortion is within 1.5.
  • the present invention is not limited to the above embodiments, and the technical solutions of the above various embodiments of the present invention can be cross-combined with each other to form a new technical solution, and the technical solutions formed by the equivalent replacement are all required by the present invention.
  • the technical solutions formed by the equivalent replacement are all required by the present invention.

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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)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

微型扬声器，包括顶部开口的支架（1）、T铁（2）、磁铁（3）、华司（4）、膜片（5）、音圈（6）、护盖（7）和电路板（8），膜片（5）由球顶部（5-1）和连接在球顶部（5-1）周向上的折环部（5-2）构成，球顶部（5-1）截面和折环部（5-2）截面的线形均为多段弧形；支架（1）的内壁处在华司（4）上方形成一圈用于供膜片（5）连接的环形台阶（9），环形台阶（9）与华司（4）之间的落差高度为0.1mm-0.8mm，折环部（5-2）的边缘处的底部连接在环形台阶（9）的顶面上；护盖（7）罩扣在膜片（5）上方，护盖（7）在与球顶部（5-1）相对的中心处开设有直径为1mm-3mm的通孔（10）。该方案通过优化微型扬声器的结构及膜片（5）设计在满足入耳式耳机对微型扬声器输出频率响应特殊要求的同时，还具有高频段特有的双峰值高声压输出频率响应。另外其谐波失真在1.5以内。

Description

一种微型扬声器
技术领域
本实用新型涉及电声转换技术领域，具体涉及一种微型扬声器。
背景技术
众所周知，扬声器用于发声。
但是目前现有的扬声器在特定频率内2500±500Hz与8000±500Hz无法做到对称性的双峰值高声压输出频率响应，并且保证其20Hz至20KHz频率段总谐波失真1.5%以内。
现通过优化微型扬声器的结构及膜片设计来实现上述目的。
实用新型内容
本实用新型要解决的技术问题是：提出一种用于入耳式耳机且具有高频段特有双峰值高声压输出频率响应和谐波失真在1.5以内的微型扬声器。
本实用新型为解决上述技术问题提出的技术方案是：一种微型扬声器，包括顶部开口的支架、T铁、磁铁、华司、膜片、音圈、护盖和电路板，所述T铁安装在所述支架中，所述磁铁为环形且套置在所述T铁上，所述华司连接在所述磁铁的顶部，所述磁铁和所述华司的内壁与所述T铁的中心柱的外壁之间形成供所述音圈上下运动的环形间隙，所述支架的内壁上且位于所述华司上方形成一圈用于供所述膜片连接的环形台阶，所述环形台阶与所述华司之间的落差高度为0.1mm-0.8mm，所述膜片的边缘底部连接在所述环形台阶的顶面上；
所述护盖罩扣在所述膜片上方，所述护盖的中心处开设有直径为1mm-3mm的通孔。
进一步的，所述膜片由球顶部和连接在所述球顶部周向上的折环部构成，所述音圈的顶部连接到所述膜片的底部，所述球顶部截面和所述折环部截面的线形均为多段弧形。
进一步的，所述音圈的顶部连接在所述球顶部与所述折环部之间的连接处的底部。
进一步的，所述膜片是由PAR材料层和PU材料层复合而成，所述膜片的顶面镀有金属钛涂层。
进一步的，所述音圈采用铜包铝漆包线绕制而成。
进一步的，所述支架的底部开设有通气孔，所述通气孔上蒙设有调音网布。
进一步的，所述折环部的边缘处设有一圈铜环，所述护盖的边缘压接在所述铜环上。
本实用新型的有益效果是：
本实用新型中的微型扬声器通过优化微型扬声器的结构及膜片设计在满足入耳式耳机对微型扬声器输出频率响应特殊要求的同时，还具有高频段特有的双峰值高声压输出频率响应。另外其谐波失真在1.5以内。
附图说明
下面结合附图对本实用新型的微型扬声器作进一步说明。
图1是本实用新型中微型扬声器的结构示意图；
图2是膜片的结构示意图；
图3是本实用新型中微型扬声器的频率响应曲线图；
图4是本实用新型中微型扬声器的谐波失真曲线图。
具体实施方式
实施例
根据图1和图2 所示，本实用新型中的微型扬声器，包括顶部开口的支架1、T铁2、磁铁3、华司4、膜片5、音圈6、护盖7和电路板8。
其中，T铁2安装在支架1中，磁铁3为环形且套置在T铁2上，华司4连接在磁铁3的顶部，磁铁3和华司4的内壁与T铁2的中心柱的外壁之间形成供音圈6上下运动的环形间隙。
膜片5由球顶部5-1和连接在球顶部5-1周向上的折环部5-2构成，当然也可以采用其它结构形式的膜片。
音圈6采用铜包铝漆包线绕制而成，音圈6的顶部连接到膜片5的底部。
球顶部5-1截面和折环部5-2截面的线形均为多段弧形，优选的：多段弧形为三段弧式，进一步地还可以在膜片5上设置加强肋纹环形阵列。
支架1的内壁处在华司4上方形成有一圈用于供膜片5连接的环形台阶9，环形台阶9与华司4之间的落差高度为0.1mm-0.8mm。
在连接时，折环部5-2的边缘处的底部连接在环形台阶9的顶面上。
护盖7罩扣在膜片5上方，护盖7在与球顶部5-1相对的中心处开设有直径为1mm-3mm的通孔10。
支架1的底部开设有通气孔，通气孔上蒙设有调音网布11。
膜片5是由PAR材料层和PU材料层复合而成，膜片5的顶面镀有金属钛涂层。
音圈6的顶部连接在球顶部5-1与折环部5-2之间的连接处的底部。
折环部5-2的边缘处设有一圈铜环12，护盖7的边缘压接在铜环12上。
如图3和图4所示，从测试数据上看，本实用新型中的扬声器实现了高频段的双峰值高声压的输出，同时保证了谐波失真在1.5以内。
本实用新型的不局限于上述实施例，本实用新型的上述各个实施例的技术方案彼此可以交叉组合形成新的技术方案，另外凡采用等同替换形成的技术方案，均落在本实用新型要求的保护范围内。

Claims (7)

  1. 一种微型扬声器，包括顶部开口的支架、T铁、磁铁、华司、膜片、音圈、护盖和电路板，所述T铁安装在所述支架中，所述磁铁为环形且套置在所述T铁上，所述华司连接在所述磁铁的顶部，所述磁铁和所述华司的内壁与所述T铁的中心柱的外壁之间形成供所述音圈上下运动的环形间隙，其特征在于：
    所述支架的内壁上且位于所述华司的上方形成一圈用于供所述膜片连接的环形台阶，所述环形台阶与所述华司之间的落差高度为0.1mm-0.8mm，所述膜片的边缘底部连接在所述环形台阶的顶面上；
    所述护盖罩扣在所述膜片上方，所述护盖的中心处开设有直径为1mm-3mm的通孔。
  2. 根据权利要求1所述微型扬声器，其特征在于：所述膜片由球顶部和连接在所述球顶部周向上的折环部构成，所述音圈的顶部连接到所述膜片的底部，所述球顶部截面和所述折环部截面的线形均为多段弧形。
  3. 根据权利要求2所述微型扬声器，其特征在于：所述音圈的顶部连接在所述球顶部与所述折环部之间连接处的底部。
  4. 根据权利要求1所述微型扬声器，其特征在于：所述膜片是由PAR材料层和PU材料层复合而成，所述膜片的顶面镀有金属钛涂层。
  5. 根据权利要求1所述微型扬声器，其特征在于：所述音圈采用铜包铝漆包线绕制而成。
  6. 根据权利要求1所述微型扬声器，其特征在于：所述支架的底部开设有通气孔，所述通气孔上蒙设有调音网布。
  7. 根据权利要求1所述微型扬声器，其特征在于：所述折环部的边缘处设有一圈铜环，所述护盖的边缘压接在所述铜环上。
PCT/CN2017/071658 2017-01-19 2017-01-19 一种微型扬声器 WO2018132996A1 (zh)

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US16/046,989 US20180376248A1 (en) 2017-01-19 2018-07-26 Micro Loudspeaker

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CN109040925A (zh) * 2018-11-02 2018-12-18 歌尔股份有限公司 球顶、扬声器和耳机
CN110177322A (zh) * 2019-05-15 2019-08-27 瑞声光电科技(常州)有限公司 屏幕发声激励器及电子设备
WO2021128048A1 (zh) * 2019-12-25 2021-07-01 瑞声声学科技(深圳)有限公司 发声器件

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