WO2015021729A1 - 微型扬声器的悬挂结构 - Google Patents

微型扬声器的悬挂结构 Download PDF

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Publication number
WO2015021729A1
WO2015021729A1 PCT/CN2013/090501 CN2013090501W WO2015021729A1 WO 2015021729 A1 WO2015021729 A1 WO 2015021729A1 CN 2013090501 W CN2013090501 W CN 2013090501W WO 2015021729 A1 WO2015021729 A1 WO 2015021729A1
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WIPO (PCT)
Prior art keywords
flexible board
diaphragm
suspension structure
elastic arm
voice coil
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PCT/CN2013/090501
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English (en)
French (fr)
Inventor
吴逸飞
徐金国
汪珍珍
王凯
Original Assignee
汉得利（常州）电子有限公司
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Application filed by 汉得利（常州）电子有限公司 filed Critical 汉得利（常州）电子有限公司
Publication of WO2015021729A1 publication Critical patent/WO2015021729A1/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
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/006—Interconnection of transducer parts
    • 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
    • H04R9/041—Centering

Definitions

  • the present invention relates to a suspension structure for a microspeaker.
  • the speaker is an electroacoustic transducing device, and the electric energy causes the diaphragm to vibrate by the electromagnetic effect, and the vibrating diaphragm resonates with the surrounding air to emit sound.
  • the magnet For the magnetic circuit portion of the current speaker, if you want to get better bass, the magnet must be as large as possible, but the large magnet needs a large voice coil to match, and the enlarged speaker is for mobile phones, tablets, notebooks, etc.
  • due to mobile phones tablets are getting thinner and thinner, and the size is getting smaller and smaller, leaving less space for assembling speakers. Therefore, due to structural and space constraints, this type of electronic product cannot provide a suitable assembly space for an increased volume of the speaker, and thus the problem of low sound pressure and low power of the speaker has not been solved.
  • the current speaker structure has the following disadvantages:
  • the existing diaphragm has a high compliantness and low elasticity, resulting in a small amplitude during the vibration process, resulting in a low sound pressure of the speaker;
  • the voice coil wire is directly welded to the basin frame. During the vibration process, the voice coil wire is subjected to the vibration pulling force, which easily causes the voice coil wire to break, thereby shortening the service life of the product.
  • a suspension structure of a miniature speaker comprising a basin frame, a magnetic cover, a front cover, a magnetic circuit device, a voice coil and a diaphragm, the magnetic cover being assembled in the basin frame and located at one end of the basin frame, the front cover and the other end of the basin frame Connected, the magnetic circuit device is located in the basin frame, one end of the magnetic circuit device is supported on the magnetic cover, and one end of the voice coil is wrapped around the magnetic circuit Around the other end of the set, the first end surface of the diaphragm is fixedly connected to the other end of the voice coil, and a plucking block is connected to the second end surface of the diaphragm.
  • the plucking block comprises a ring bracket, a plurality of elastic arms and a flexible board, and the ring bracket
  • the end portion and the diaphragm are located and fixed between the basin frame and the front cover, and each elastic arm is distributed between the annular bracket and the flexible plate, and one end of each elastic arm is connected with the inner side wall surface of the annular bracket, and the other end of each elastic arm They are respectively connected to the side wall surfaces of the flexible board, and the wires on the voice coil are welded to the flexible board.
  • a plucking block is connected to the second end surface of the diaphragm, the plucking block comprises a ring bracket, a plurality of elastic arms and a flexible board, and the end of the ring bracket and the diaphragm are located and fixed between the basin frame and the front cover
  • Each of the elastic arms is disposed between the annular bracket and the flexible plate, and one end of each elastic arm is connected to the inner side wall surface of the annular bracket, and the other end of each elastic arm is respectively connected to the side wall surface of the flexible board.
  • the voice coil drives the diaphragm to vibrate. When the diaphragm vibrates, the plucking block is vibrated.
  • the specific vibration of the plucking block is:
  • the flexible plate of the plucking block generates vibration, and the elastic arm of the plucking block is vibrated. The force is deformed.
  • a tensile force is generated on the flexible plate. Therefore, when the plucking block vibrates with the diaphragm, the vibration of the diaphragm is prevented from being unstable.
  • the compliantness of the diaphragm is lowered and the rigidity is increased, so that the amplitude of the diaphragm can be increased upon vibration, and therefore, the power of the speaker is increased. As the diaphragm decreases in compliance, the low frequency distortion of the speaker is reduced.
  • the present invention is composed of a diaphragm and a plucking block to make the vibration device more elastic, thereby increasing the sound pressure.
  • the invention can increase the sound pressure of 3-6dB under the same structure, and the power can be more than doubled. Since the wires on the voice coil are soldered to the flexible board, there is no wire in the middle of the speaker to be pulled and pulled, and the life of the product is guaranteed, and there is no problem of soundless life.
  • the invention is applied to the inside of a mobile phone, a tablet computer and a notebook computer, and solves the problem of high sound pressure, high power and high fidelity bass of electronic products such as mobile phones and tablet computers, so that technical problems existing in the field have been solved for a long time.
  • FIG. 1 is a schematic structural view of a suspension structure of a first type of microspeaker of the present invention
  • Figure 2 is a schematic view showing the assembly of the plucking block and the diaphragm of Figure 1;
  • FIG. 3 is a schematic structural view of a second type of speaker of the present invention.
  • Figure 4 is a schematic view showing the assembly of the plucking block and the diaphragm of Figure 2;
  • Figure 5 shows a comparison of the sound pressure curves of the plucking block after adding the plucking block to the suspension structure of the microspeaker;
  • Figure 6 shows a comparison of the distortion curves of the plucking block after adding the plucking block to the suspension structure of the microspeaker
  • 1 is a basin frame
  • 2 is a magnetic cover
  • 3 is a front cover
  • 5 is a voice coil
  • 6 is a diaphragm
  • 7 is a magnetic steel
  • 8 is a pole piece
  • 10 is a plucking block
  • 11 is a ring bracket
  • 12 It is an elastic arm
  • 13 is a flexible board
  • 14 is a bump.
  • the suspension structure of the microspeaker of the present invention comprises a basin frame 1, a magnetic cover 2, a front cover 3, a magnetic circuit device, a voice coil 5, and a diaphragm 6.
  • the magnetic cover 2 is fitted in the basin frame 1 at one end of the basin frame 1, and the front cover 3 is connected to the other end of the basin frame 1.
  • the magnetic circuit device is located in the basin frame 1, and one end of the magnetic circuit device is supported on the magnetic shield 2, and the magnetic circuit device is composed of a magnetic steel 7 and a pole piece 8 fixed integrally with the magnetic steel 7.
  • One end of the voice coil 5 surrounds the other end of the magnetic circuit device.
  • the first end surface of the diaphragm 6 is fixedly coupled to the other end of the voice coil 5, and a plucking block 10 is attached to the second end surface of the diaphragm 6.
  • the plucking block 10 includes an annular bracket 11, a plurality of elastic arms 12, and a flexible plate 13.
  • the end of the annular bracket 11 and the diaphragm 6 are located and fixed between the basin frame 1 and the front cover 3, and the respective elastic arms 12 are distributed on the annular bracket.
  • 11 and the flexible plate 13 one end of each elastic arm 13 is connected to the inner wall surface of the annular bracket, and the other end of each elastic arm 12 is respectively connected with the side wall surface of the flexible board 13, and the portion of the flexible board that is connected with the elastic arm,
  • the junction structure of the two adjacent side wall faces of the flexible board enables the flexible board to be evenly stressed during vibration and can vibrate smoothly during vibration.
  • the elastic arm 12 is bent to extend to a side wall surface of the flexible board to form a first curved connecting portion, and the other end of the elastic arm is bent to extend to a side wall surface of the flexible board to form a second curved connecting portion.
  • the elastic arm of the structure helps the flexible plate to exert a pulling force on the vibration.
  • the wires on the voice coil 5 are soldered to the flexible board 13.
  • the flexible board 13 includes an inner ring bracket and a middle sticker, and the middle patch is fixed in the middle of the inner ring bracket. Referring to Fig. 2, the inner ring bracket of the flexible board is formed separately from the middle patch.
  • the split molded structure is symmetrically provided with a pair of bumps 14 on the surface of the middle patch.
  • the speaker has a different structure than the flexible board. The rest of the structure is the same, in which the inner ring bracket of the flexible board 13 is integrally formed with the center sticker.
  • the compliantness of the diaphragm is lowered and the rigidity is increased due to the presence of the plucking block, so that the amplitude of the diaphragm can be increased upon vibration, and therefore, the power of the speaker is increased.
  • the diaphragm decreases in compliance, the low frequency distortion of the speaker is reduced.
  • the present invention is composed of a diaphragm and a plucking block to make the vibration device more elastic, thereby increasing the sound pressure.
  • the invention can increase the sound pressure of 3-6dB under the same structure, and the power can be more than doubled. Because the wires on the voice coil are soldered to the flexible board.
  • the sound pressure curve of the structure of the present invention can be improved by 3-6 dB over the entire frequency band of the low frequency, and the low frequency THD is lower than the ordinary design.
  • the sound is clear when playing music, giving people a sense of hearing.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

本发明涉及一种微型扬声器的悬挂结构。在该悬挂结构中，膜片的第一端面与音圈的一端固定连接，膜片的第二端面上连接一个弹拨块，弹拨块包括环形支架、多个弹力臂以及柔性板，环形支架的端部以及膜片固定在盆架与前盖之间，各个弹力臂分布在环形支架与柔性板之间，各个弹力臂的一端与环形支架的内侧壁面连接，各个弹力臂的另一端分别与柔性板的侧壁面连接，所述音圈上的导线与柔性板焊接。本发明的微型扬声器的悬挂结构降低了低频失真，提升了产品功率并且延长了产品寿命。

Description

微型扬声器的悬挂结构
技术领域
本发明涉及一种微型扬声器的悬挂结构。
背景技术
扬声器属于电声换能器件， 电能通过电磁效应使得膜片振动， 振动的膜片 与周围的空气共振而发出声音。 对于目前的扬声器的磁路部分， 如果为获得更 好的低音效果， 磁体必须尽可能的大， 但大磁体需要大音圈进行配合， 增大体 积后的扬声器对于手机、 平板电脑、 笔记本一类的电子产品来说， 由于手机， 平板电脑越做越薄， 尺寸越来越小， 留给装配扬声器的空间也越来越小。 因此， 这一类的电子产品由于结构及空间的限制， 对增大体积的扬声器无法提供一个 合适的装配空间， 从而扬声器声压低、 功率低的问题一直没有得到解决。
另外， 目前的扬声器的结构还存有以下缺点：
第一， 由于膜片是一层很薄的薄膜， 膜片在振动过程中， 由于其自身强度 因素， 出现振动不平衡， 导致低频失真；
第二， 现有的膜片顺性较高， 其弹性低， 导致在振动过程中其振幅小， 造 成扬声器的声压低；
第三， 将音圈线直接焊接在盆架上， 在振动过程中， 音圈线受到振动的拉 力作用， 容易造成音圈线的断裂， 从而缩短了产品的使用寿命。
发明内容
本发明的目的在于， 提供一种降低低频失真， 提升产品声压、 功率以及延 长寿命的微型扬声器的悬挂结构。
解决上述技术问题的技术方案如下：
一种微型扬声器的悬挂结构， 包括盆架、 磁罩、 前盖、 磁路装置、 音圈以 及膜片， 磁罩装配在盆架中并位于盆架的一端， 前盖与盆架的另一端连接， 磁 路装置位于盆架中， 磁路装置的一端支撑在磁罩上， 音圈的一端环绕在磁路装 置的另一端的周围， 膜片的第一端面与音圈的另一端固定连接， 膜片的第二端 面上连接一个弹拨块， 弹拨块包括环形支架、 多个弹力臂以及柔性板， 环形支 架的端部以及膜片位于并固定在盆架与前盖之间， 各个弹力臂分布在环形支架 与柔性板之间， 各个弹力臂的一端与环形支架的内侧壁面连接， 各个弹力臂的 另一端分别与柔性板的侧壁面连接， 所述音圈上的导线与柔性板焊接。
采用了上述方案， 膜片的第二端面上连接一个弹拨块， 弹拨块包括环形支 架、 多个弹力臂以及柔性板， 环形支架的端部以及膜片位于并固定在盆架与前 盖之间， 各个弹力臂分布在环形支架与柔性板之间， 各个弹力臂的一端与环形 支架的内侧壁面连接， 各个弹力臂的另一端分别与柔性板的侧壁面连接。 工作 过程中， 在电磁作用力下， 音圈带动膜片振动， 膜片振动时带动弹拨块随之振 动， 弹拨块的具体振动为： 弹拨块的柔性板产生振动， 弹拨块的弹力臂受振动 作用力发生变形， 当柔性板振动时， 对柔性板产生一个拉力作用， 因此， 弹拨 块随膜片振动时， 避免了膜片振动的不平稳。 而且由于弹拨块的存在， 使得膜 片的顺性降低， 刚性得到增加， 这样， 膜片在振动时其振幅能够增大， 因此， 扬声器的功率得到增加。 膜片在顺性降低的同时， 扬声器的低频失真得到降低。 本发明相对现有的扬声器来说， 由膜片以及弹拨块组成的使振动装置更有弹力， 从而增加声压。 本发明可以在相同的结构下提升 3— 6dB的声压， 且功率可以提 升一倍以上。 由于音圈上的导线与柔性板焊接， 这样， 扬声器中间没有导线悬 空受拉力， 而保障产品的寿命， 不会有无音的寿命问题。
本发明用于到手机、 平板电脑、 笔记本电脑内部后， 解决了手机、 平板电 脑等电子产品高声压高功率以及高保真的低音问题， 使得长期以来存在于本领 域内的技术问题得到解决。 附图说明
图 1为本发明的第一种微型扬声器的悬挂结构的结构示意图；
图 2为图 1中弹拨块与膜片的装配示意图；
图 3为本发明的第二种扬声器的结构示意图；
图 4为图 2中弹拨块与膜片的装配示意图； 图 5 反映了在微型扬声器的悬挂结构上增加弹拨块后与未增加弹拨块的声 压曲线对比图；
图 6 反映了在微型扬声器的悬挂结构上增加弹拨块后与未增加弹拨块的失 真曲线对比图；
附图中， 1为盆架、 2为磁罩、 3为前盖、 5为音圈、 6为膜片、 7为磁钢、 8为极片， 10为弹拨块、 11为环形支架、 12为弹力臂、 13为柔性板、 14为凸 块。 具体实施方式
下面结合附图和具体实施方式对本发明作进一步详细的说明。
参照图 1和图 2， 本发明的微型扬声器的悬挂结构， 包括盆架 1、 磁罩 2、 前盖 3、 磁路装置、 音圈 5以及膜片 6。 磁罩 2装配在盆架 1中并位于盆架 1的 一端， 前盖 3与盆架 1的另一端连接。 磁路装置位于盆架 1中， 磁路装置的一 端支撑在磁罩 2上， 磁路装置由磁钢 7和与该磁钢 7固定为一体的极片 8组成。 音圈 5的一端环绕在磁路装置的另一端的周围。 膜片 6的第一端面与音圈 5的 另一端固定连接， 膜片 6的第二端面上连接一个弹拨块 10。
弹拨块 10包括环形支架 11、 多个弹力臂 12 以及柔性板 13， 环形支架 11 的端部以及膜片 6位于并固定在盆架 1与前盖 3之间， 各个弹力臂 12分布在环 形支架 11与柔性板 13之间，各个弹力臂 13的一端与环形支架的内侧壁面连接， 各个弹力臂 12的另一端分别与柔性板 13的侧壁面连接， 柔性板的与弹力臂相 连接的部位， 为该柔性板上的两个相邻侧壁面的交界处， 这种连接结构， 使柔 性板在振动过程中受力均匀， 振动时能够平稳地振动。 所述弹力臂 12的一端经 过弯曲后向柔性板的侧壁面延伸形成第一弧形连接段， 弹力臂的另一端经过弯 曲后向柔性板的侧壁面延伸形成第二弧形连接段， 这种结构的弹力臂， 有利于 柔性板在振动时对其施以拉力作用。 所述音圈 5上的导线与柔性板 13焊接。 所 述柔性板 13包括内环支架以及中贴， 该中贴固定在内环支架的中部。参照图 2， 柔性板的内环支架与中贴分体成型， 这种分体成型的结构， 在中贴的表面上对 称设置有一对凸块 14。 参照图 3及图 4， 扬声器除了柔性板的结构不同之外， 其余结构均相同， 在该结构中， 柔性板 13的内环支架与中贴一体成型。
基于以上方案， 即在本发明中由于弹拨块的存在， 使得膜片的顺性降低， 刚性得到增加， 这样， 膜片在振动时其振幅能够增大， 因此， 扬声器的功率得 到增加。 膜片在顺性降低的同时， 扬声器的低频失真得到降低。 本发明相对现 有的扬声器来说， 由膜片以及弹拨块组成的使振动装置更有弹力， 从而增加声 压。本发明可以在相同的结构下提升 3— 6dB的声压，且功率可以提升一倍以上。 由于音圈上的导线与柔性板焊接。
参照图 5和图 6， 从曲线上对比可以看出， 采用本发明结构声压曲线可以在 低频整个频段提升 3— 6dB， 并且低频 THD比普通设计低。 在播放音乐时声音清 晰， 给人听觉上增强享受。
虽然以上描述了本发明的具体实施方式， 但是本技术领域内的熟练技术人 员应当理解， 这些仅是举例说明， 可以对这些实施方式做出多种变更或修改， 而不背离本发明的原理和实质。 本发明的范围仅由所附权利要求书限定。

Claims

权 利 要 求 书
1. 一种微型扬声器的悬挂结构， 包括盆架、 磁罩、 前盖、 磁路装置、 音圈 以及膜片， 磁罩装配在盆架中并位于盆架的一端， 前盖与盆架的另一端连接， 磁路装置位于盆架中， 磁路装置的一端支撑在磁罩上， 音圈的一端环绕在磁路 装置的另一端的周围， 膜片的第一端面与音圈的另一端固定连接， 其特征在于: 膜片的第二端面上连接一个弹拨块， 弹拨块包括环形支架、 多个弹力臂以及柔 性板， 环形支架的端部以及膜片位于并固定在盆架与前盖之间， 各个弹力臂分 布在环形支架与柔性板之间， 各个弹力臂的一端与环形支架的内侧壁面连接， 各个弹力臂的另一端分别与柔性板的侧壁面连接， 所述音圈上的导线与柔性板 焊接。
2. 根据权利要求 1所述微型扬声器的悬挂结构， 其特征在于： 所述柔性板 包括内环支架以及中贴， 该中贴固定在内环支架的中部。
3. 根据权利要求 2所述微型扬声器的悬挂结构， 其特征在于： 所述中贴的 表面上对称设置有一对凸块。
4. 根据权利要求 1所述微型扬声器的悬挂结构， 其特征在于： 柔性板的与 弹力臂相连接的部位， 为该柔性板上的两个相邻侧壁面的交界处。
5. 根据权利要求 1所述微型扬声器的悬挂结构， 其特征在于： 所述弹力臂 的一端经过弯曲后向柔性板的侧壁面延伸形成第一弧形连接段， 弹力臂的另一 端经过弯曲后向柔性板的侧壁面延伸形成第二弧形连接段。
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