WO2007076677A1 - A separate support structure for loudspeaker diaphragm - Google Patents

A separate support structure for loudspeaker diaphragm Download PDF

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Publication number
WO2007076677A1
WO2007076677A1 PCT/CN2006/003047 CN2006003047W WO2007076677A1 WO 2007076677 A1 WO2007076677 A1 WO 2007076677A1 CN 2006003047 W CN2006003047 W CN 2006003047W WO 2007076677 A1 WO2007076677 A1 WO 2007076677A1
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WIPO (PCT)
Prior art keywords
diaphragm
elastic body
speaker
support structure
curved
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PCT/CN2006/003047
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English (en)
French (fr)
Inventor
Yi Ding
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Individual
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Individual
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Priority to US12/159,347 priority Critical patent/US8094863B2/en
Priority to DK06805232.3T priority patent/DK1976331T3/da
Priority to EP06805232.3A priority patent/EP1976331B1/en
Publication of WO2007076677A1 publication Critical patent/WO2007076677A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/204—Material aspects of the outer suspension of loudspeaker diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/207—Shape aspects of the outer suspension of loudspeaker diaphragms

Definitions

  • the present invention relates to the field of electroacoustic technology, and in particular to a support structure for supporting positioning of a speaker diaphragm and maintaining vibration of a diaphragm of a speaker, and more particularly to a split diaphragm support technique.
  • Background technique
  • the diaphragms of cone-shaped speakers and dome-top speakers commonly used in the market use folding ring (some also include centering pieces) support technology, and the folding ring supports the diaphragm to vibrate the diaphragm under the action of electric sound to output sound.
  • the folding ring and the diaphragm form an integral structure.
  • Some folding rings and diaphragms are made of the same material, and the two are in a monolithic structure; some diaphragms and folding rings are made of two materials, and the two are combined by techniques such as gluing. Integral structure.
  • an aluminum belt diaphragm having a thickness of about 0.006 to 0.02 mm is usually used, and the belt diaphragm is formed into a corrugated shape to support and maintain vibration of the diaphragm.
  • this kind of speaker is a very excellent tweeter, the wrinkled aluminum diaphragm has a long-term effect of electromagnetic force and other strong external forces, the wrinkles are easily relaxed, and the diaphragm becomes long and deviated. In the central area of the gap, distortion occurs during operation, so its reliability and service life problems are difficult to solve for a long time.
  • the diaphragm is a plastic-aluminum foil composite film made of polyester or polyesterimide film as a substrate, and is made by a flexible circuit board process.
  • the planar diaphragm relies on the elasticity of the plastic film between the fixed ring around the flat film and the flexible circuit to support its vibration.
  • the elastic support ring of the planar diaphragm must have a certain width, which results in a large total area of the flat diaphragm speaker diaphragm.
  • flat-film loudspeakers on the market have been used as planar diaphragm loudspeakers with polyimide as the substrate.
  • a split type support structure for a speaker diaphragm for supporting a speaker diaphragm to position and maintain speaker diaphragm vibration
  • the support structure includes: a first elastic body, the first An elastic body having a first matching surface of a curved shape; and a second elastic body having a second opposing surface, the curved surface shape of the second opposing surface being complementary to the curved surface shape of the first opposing surface Matching; the first mating surface of the first elastic body and the second mating surface of the second elastic body sandwiching the supported portion from opposite sides of the supported portion of the speaker diaphragm.
  • the elastic body is held and supported by the supported portion sandwiching the supported portion of the diaphragm, and no other connecting means such as an adhesive is provided between the elastic body and the diaphragm.
  • a supported support structure is formed between the supported portion of the diaphragm and the curved elastic body.
  • the speaker diaphragm may be a flexible diaphragm or a rigid diaphragm.
  • the split support structure proposed by the present invention removes the fold ring to reduce the vibration quality, which is particularly important for reproducing high frequency signals. Further, when the support structure of the present invention is applied to a band speaker or a flat film speaker, it is possible to compensate for the insufficiency of the elastic deformation of the diaphragm material itself.
  • FIG. 1 is an exploded perspective view showing a support structure of a speaker diaphragm according to a first embodiment of the present invention.
  • Figure 2 is a cross-sectional view showing a support structure of a speaker diaphragm according to the present invention.
  • Figure 3 is a cross-sectional view showing a support structure of a speaker diaphragm according to a second embodiment of the present invention.
  • Figure 4 is a cross-sectional view showing a support structure of a speaker diaphragm in accordance with a third embodiment of the present invention.
  • Figure 5 shows the overall graphical structure of various support structures.
  • Figure 6 is an exemplary view of the application of the split support structure on a conical speaker.
  • Figure 7 is a schematic view of the application of the split support structure on the dome tweeter.
  • Figure 8 is a schematic diagram of the application of the split support structure on the ultra-long belt speaker (diaphragm part).
  • Figure 9 is a schematic diagram of the application of the split support structure on the flat film speaker (diaphragm part). Label description
  • Fig. 1 shows a split type speaker diaphragm support structure for supporting the positioning of a speaker diaphragm and maintaining vibration of a speaker diaphragm in accordance with a first embodiment of the present invention.
  • This supporting structure includes a first curved elastic body 1, a second curved elastic body 2, and a supported portion 3-1 of the speaker diaphragm.
  • the first curved elastic body 1 has a first curved surface 12 having a convex curved shape
  • the second curved elastic body 2 has a concave curved shape complementary to the curved shape of the first curved elastic body.
  • the second facing face 13 The second facing face 13 .
  • the first mating face 12 of the first elastic body 1 and the second facing face 13 of the second elastic body 2 are oppositely opposed from both sides of the supported portion 3-1 of the speaker diaphragm 7, thereby sandwiching the supported portion 3-1. It should be noted that there is no connection means such as an adhesive between the first facing surface, the second opposing surface and the diaphragm, which is particularly advantageous for improving the performance of the speaker.
  • the diaphragm of the speaker is a flexible diaphragm 7.
  • the supported portion 3-1 of the flexible diaphragm 7 of the speaker is interposed between the two opposing faces of the two curved elastic bodies 1 and 2.
  • the flexible diaphragm 7 may be a belt diaphragm in the band speaker.
  • a flat diaphragm of a flat diaphragm speaker denotes a first fixing member that connects the curved elastic body, and the first curved elastic body 1 is fixed to the first fixing member 4 by an embedding method.
  • Reference numeral 5 in the figure denotes a second fixing member that connects the curved elastic body, and in the drawing, the second curved elastic body 2 is fixed to the second fixing member 5 by the adhesive layer 6. It should be noted that the connection between the fixing member and the elastic body can be selected according to the use environment and the manufacturing process, and is not uniquely determined.
  • the first and second curved elastic bodies 1, 2 may be made of a polymer elastic material such as various rubbers, polyurethane rubber or the like.
  • a polymer elastic material such as various rubbers, polyurethane rubber or the like.
  • the elastic body can be preferably made of a high temperature resistant polymer elastic material. , such as fluoro rubber, silicone rubber, etc.
  • the support structure shown in Fig. 2 is a combination of a curved elastic body and a flexible supported portion in a speaker having a flexible diaphragm such as a band speaker or a flat film speaker.
  • the flexible diaphragm has a fixed section or a fixed area for fixedly connecting the diaphragm to the speaker body to fix the diaphragm; and the split supporting structure composed of the curved elastic body functions to support the flexible diaphragm to be tensioned, Position the diaphragm in the diaphragm center area.
  • the two curved surfaces The elastomer is facing or closed or closed, the diaphragm is either extended or tightened, and the split support structure supports and maintains the diaphragm to vibrate within a certain amplitude while ensuring that the diaphragm does not exceed the elastic limit.
  • the positions of the curved elastic bodies 1, 2 are generally disposed inside the belt-shaped diaphragm fixing section 11, and the elastic body may be disposed at one or both ends of the belt-shaped diaphragm.
  • the elastic body may be disposed at one or both ends of the belt-shaped diaphragm.
  • FIG. 8 a schematic diagram of the super long belt speaker diaphragm and the curved elastic body supporting structure, in the illustrated ultra long strip speaker, such as a strip diaphragm up to 300 mm or more in the diaphragm
  • One or more pairs of curved elastomers can be placed in the middle to further support and stabilize the flexible diaphragm.
  • the position of the split supporting structure including the curved elastic bodies 1 and 2 is usually between the flexible conductive line 27 and the diaphragm fixing ring.
  • the minimum curvature radius of the curved shape of the first elastic body 1 and the second elastic body 2 is greater than or equal to the minimum allowable bending radius of the flexible diaphragm 7.
  • the difference between the line length of the cross-sectional curve of the first and second elastic bodies and the linear length of the cross-section is greater than or equal to the difference between the line length of the diaphragm at the maximum amplitude of the flexible diaphragm and the length of the diaphragm line at the minimum amplitude of the diaphragm.
  • Fig. 3 shows a support structure of a speaker diaphragm according to a second embodiment of the present invention. Also shown in Figure 3 is a split speaker diaphragm support structure. Unlike the structure shown in Fig. 2, the speaker diaphragm of Fig. 3 is a rigid diaphragm 8, which has a rigid supported portion 3-2.
  • the first curved elastic body 9 and the second curved elastic body 10 are both hollow elastic blocks, and the elastic blocks are made of a polymer material elastic material.
  • the supported portion 3-2 of the rigid diaphragm 8 of the speaker is interposed between the first mating surface of the first curved elastic body 9 and the second opposing surface of the second curved elastic body 10, thereby The purpose of supporting and holding the diaphragm of the speaker is achieved.
  • the first hollow curved surface elastic body 9 has a convex curved surface shape
  • the second hollow curved surface elastic body 10 has a concave curved surface shape
  • the curved surfaces of the two elastic bodies 9 and 10 are mutually compatible, and the rigid vibration is obtained.
  • the supported portion 3-2 of the film is interposed between two complementary curved surfaces, and the supported portion 3-2 of the rigid diaphragm has a shape matching the curved surface of the curved elastic bodies 9, 10.
  • the hollow curved elastic body can be made into a drum structure.
  • the supported portion 3-2 of the rigid diaphragm and the first and second elastic bodies 9, 10 are formed in a split configuration, that is, there is no longer a fixed connection between them, such as an adhesive. means.
  • the first curved elastic body 9 can be fixed in the first fixing member 4 by an embedding method, and the second curved elastic body 10 can be fixed in the second fixing member 5 by an adhesive.
  • the connection between the fixing member and the elastic body can be selected according to the use environment and manufacturing process, and is not uniquely limited.
  • the split support structure shown in Figure 3 is a combination of a rigid diaphragm support 3-2 and curved elastomers 9, 10 that can withstand vibration and maintain its curved shape.
  • the body support structure allows the rigid diaphragm to vibrate under the action of the vertical axis (perpendicular to the plane of the diaphragm), and the curved elastomer support structure can stabilize the radial position of the rigid diaphragm.
  • the minimum elasticity of the curved elastomer should be greater than or equal to the maximum amplitude of the diaphragm of the loudspeaker.
  • Fig. 4 shows a foil-like diaphragm supporting structure according to a third embodiment of the present invention.
  • the support structure includes a first metal curved surface elastic body 16 of a first opposing surface and a second metallic curved surface elastic body 17 of a second opposing surface, the opposing surfaces of the two metallic curved elastic bodies 16 and 17
  • the S-shaped matching curved surface can be sandwiched between the two opposing faces and complementarily matched together. It is to be noted that the supported portion and the first and second elastic bodies 16 and 17 are formed in a split structure, that is, they no longer have a fixing means such as an adhesive therebetween.
  • the first and second metal curved elastic bodies respectively have elastomer fixing sections 14 and 15, which are fixed to the speaker body by means of welding, fasteners, or insertion slots.
  • a flexible diaphragm 7 is interposed between the metallic curved elastomer.
  • a metallic curved elastomer can also be used to support and maintain the positioning of the rigid diaphragm 8 and the vibration of the rigid diaphragm.
  • the metal curved body can be made of materials such as phosphor bronze and beryllium copper.
  • the curved shape of the elastic body in the support structure can be of various types, such as a wave shape, a sinusoidal waveform,
  • the split type support structure of the present invention can be used for a speaker of a flexible diaphragm, such as a belt speaker, a flat film speaker, and a partial dome tweeter; meanwhile, the support structure can also be used for a rigid diaphragm.
  • Speakers such as the cone speaker shown in Figure 6, and the dome tweeter shown in Figure 7.
  • the first curved surface elastic body 1 and the second curved surface elastic body 2 sandwich and fix the tapered diaphragm 23 in the tapered elongated body; in FIG. 7, the first curved surface elastic body 1 and the second curved surface elastic body The body 2 holds the dome diaphragm 25 to which the dome tweeter is fixed.
  • Fig. 5 shows a part of the pattern, in which 18 and 19 are strip-shaped curved elastic bodies, 20 is a circular curved elastic body, and 21 is a square curved elastic body with rounded corners, and 22 The curved body is shown as a "concave" shape.
  • the ellipse is also an integral shape that can be used.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Description

扬声器振膜的分体式支承结构 技术领域
本发明涉及电声技术领域， 具体涉及支持扬声器振膜的定位和保持扬声器 振膜振动的支承结构， 尤其涉及一种分体式的振膜支承技术。 背景技术
目前市场上常见的锥型扬声器和球顶扬声器的振膜采用折环 (有的还包括 定心支片)支承技术， 折环支持振膜在电声策动力作用下使振膜振动而输出声 音， 折环与振膜成整体结构。 有的折环与振膜釆用同一种材料制成， 两者成整 体式结构； 有的振膜和折环分别釆用两种材料制成， 两者用胶合等技术手段结 合在一起， 也成整体式结构。
业界对振膜、 折环和材料、 工艺进行了大量的探索， 以求得扬声器的更佳 性能。 然而， 以整体式支承结构为特征的扬声器成熟产品， 特别在高音、 超高 音领域， 固守现有技术已难以在技术性能上取得大的突破。
在常规的带式扬声器方面， 通常采用 0.006-0.02mm左右厚度的铝带振膜， 带状振膜做成皱折形状以支持和保持振膜振动。 尽管这种扬声器是十分优秀的 高音单元， 但是皱折状的铝带振膜， 当受到电磁力的长期作用和其它较强外力 影响时， 皱折很容易松驰， 振膜变长并脱离磁隙中心区， 工作时产生失真， 因 此， 其可靠性和使用寿命问题长期难以解决。
近年来， 已经有聚酰亚胺与铝箔的复合振膜应用在带式扬声器上， 并在带 状振膜头部以类似波浪形的金属弹簧作为支承结构件的过渡段作为整体式支 承结构， 这在一定程度上提高了带状振膜的可靠性和使用寿命， 然而， 带状复 合振膜与波浪形支承结构件交界处应力集中问题还是难以解决， 在技术上还不 够完善。
在平膜扬声器上，振膜是由聚酯、聚酯亚胺类薄膜作为基材的塑-铝箔复合 膜， 用柔性线路板工艺制成。 平面振膜依靠平膜四周固定圈与柔性电路之间的 塑料薄膜的弹性支承其振动。 为保证足够的弹性支承振膜的振动， 平面振膜的 弹性支承圈必须有一定的宽度， 这造成平膜扬声器振膜总面积较大。 近年来， 市场上的平膜扬声器， 有用聚酰亚胺做基材的平面振膜扬声器产品。 对这种产 品输入信号以后再进行解析， 结果发现， 振膜局部或振膜整体出现永久变形。 这说明该振膜的弹性支承圈的弹性无法完全满足振膜振动的要求。 这种永久变 形的结果使振膜偏离正常工作区， 并引起失真。
上述三例支承扬声器振膜的支承结构， 有一个共同的特点是支承结构与振 膜构成为一个整体， 这种结构在技术上存在一定的局限性。 发明内容
本发明的目的在于克服上述现有技术中的缺陷， 提高扬声器的技术性能。 为此， 根据本发明的一种扬声器振膜的分体式支承结构， 该支承结构用于 支持扬声器振膜定位和保持扬声器振膜振动， 其中， 所述支承结构包括： 第一 弹性体， 该第一弹性体具有一曲面形状的第一对合面； 以及， 具有第二对合面 的第二弹性体， 所述第二对合面的曲面形状与所述第一对合面的曲面形状互补 匹配； 所述第一弹性体的第一对合面和所述第二弹性体的第二对合面从所述扬 声器振膜的被支承部的两侧相对对合夹住被支承部。 - 本发明的振膜支承结构， 弹性体通过对合面夹住振膜的被支承部而进行保 持支承， 弹性体与振膜之间不另设如粘合剂之类的其它连接手段， 因此， 振膜 的被支承部与曲面弹性体之间构成一种分体式的支承结构。 这样， 曲面弹性体 将通过被支承部将振膜支承定位在振膜工作中心区域， 在工作状态时保持振膜 随音频信号以相应的振幅振动。
在本发明的分体式支承结构中， 扬声器振膜可以为柔性振膜也可以为刚性 振膜。
此外， 与整体式支承结构比较， 在锥形扬声器、 球顶扬声器上， 由于本发 明提出的分体式支承结构去除了折环减小了振动质量， 这对于重放高频信号尤 为重要。 此外， 当本发明的支承结构应用于带式扬声器、 平膜扬声器中， 可以 弥补振膜材料本身的弹性形变不足的缺陷。 附图说明
图 1为根据本发明第一实施例的扬声器振膜的支承结构的分解立体图。 图 2为根据本发明的扬声器振膜的支承结构的剖面图。
图 3为根据本发明第二实施例的扬声器振膜的支承结构的剖面图。
图 4为根据本发明第三实施例的扬声器振膜的支承结构的剖面图。
图 5示出了多种支承结构的整体图形结构。 图 6为分体式支承结构在锥形扬声器上应用示范图。
图 7为分体式支承结构在球顶高音扬声器上应用示意图。
图 8为分体式支承结构在超长带式扬声器 （振膜部分） 上应用示意图。 图 9为分体式支承结构在平膜扬声器 （振膜部分） 上应用示意图。 标号说明
1 第一曲面弹性体
2 第二曲面弹性体
3-1 柔性被支承部
3-2 刚性被支承部
4 曲面弹性体的第一固定件
5 曲面弹性体的第二固定件
6 粘胶层
7 柔性振膜
8 刚性振膜
9 空心构造的高分子第一曲面弹性体
10 空心构造的高分子第二曲面弹性体
11 柔性振膜固定段
12 第一曲面弹性体的对合面
13 第二曲面弹性体的对合面
14 第一金属曲面弹性体固定段
15 第二金属曲面弹性体固定段
16 第一金属曲面弹性体
17 第二金属曲面弹性体
18 条形的第一曲面弹性体
19 条形的第二曲面弹性体
20 圆形第二曲面弹性体
21 方型 (带圆角)的第二曲面弹性体
22 "凹"字型的第二曲面弹性体
23锥形振膜
24音圈 （线圈）
25球顶振膜 26平膜扬声器振膜导电线路接点
27平膜扬声器振膜导电线路 具体实施方式
以下， 结合附图对本发明的具体实施方式作详细描述。
图 1 示出了根据本发明的第一实施例的一种分体式的扬声器振膜支承结 构， 这种支承结构用于支持扬声器振膜的定位和保持扬声器振膜振动。 这种支 承结构包括一第一曲面弹性体 1、 一第二曲面弹性体 2以及扬声器振膜的被支 承部 3-1。 在本实施例中， 第一曲面弹性体 1具有凸出的曲面形状的第一对合 面 12，第二曲面弹性体 2具有与第一曲面弹性体的曲面形状互补配合的凹进的 曲面形状的第二对合面 13。 第一弹性体 1的第一对合面 12和第二弹性体 2的 第二对合面 13从扬声器振膜 7的被支承部 3-1的两侧相对对合，从而夹住被支 承部 3-1。 需说明的是， 第一对合面、 第二对合面与振膜之间不具有如粘合剂 之类的连接手段， 这对于提高扬声器的性能是尤为有利的。
如图 2所示， 在本发明的第一实施例中，扬声器的振膜为一种柔性振膜 7。 两个曲面弹性体 1和 2的两个对合面之间夹设着扬声器的柔性振膜 7的被支承 部 3-1， 例如， 柔性振膜 7可以为带式扬声器中的带式振膜或平膜扬声器的平 面振膜。 图 2中的标号 4表示连接曲面弹性体的第一固定件， 第一曲面弹性体 1通过嵌入法固定在第一固定件 4上。 图中的标号 5表示连接曲面弹性体的第 二固定件，在图示中，第二曲面弹性体 2通过粘胶层 6固定在第二固定件 5上。 需说明的是， 固定件与弹性体之间的连接方式可以根据使用环境和制造工艺进 行选择， 并不是唯一确定的。
第一和第二曲面弹性体 1、 2均可由高分子弹性材料制成， 如各种橡胶、 聚氨橡胶等。 例如在带式扬声器和平膜扬声器中， 由于振膜中的导电线路通过 电流， 在最大功率状态时温度可达摄氏 100度以上， 因此， 弹性体可以最好由 耐高温的高分子弹性材料制成， 如氟橡胶、 硅橡胶等。
再次说明， 图 2所示的支承结构为在带式扬声器、 平膜扬声器等具有柔性 振膜的扬声器中的曲面弹性体及柔性被支承部的组合。 常规情况下， 柔性振膜 具有将振膜固定连接到扬声器本体上的固定段或固定区域， 以便将振膜固定； 而由曲面弹性体构成的分体式支承结构作用在于支承柔性振膜张紧， 并使振膜 定位在振膜工作中心区域。在振膜-被支承部受音频信号策动力作用时，两曲面 弹性体对合面或开启或闭合， 振膜得以或伸展或收紧， 分体式支承结构支承和 保持振膜在一定的振幅内振动， 同时保证振膜不超过弹性极限。 在带式扬声器 中， 曲面弹性体 1、 2的位置一般设置在带状振膜固定段 11的内侧， 并且弹性 体可以设置在带状振膜的一头或二头。 此外， 如图 8超长带式扬声器振膜及曲 面弹性体支承结构的示意图， 在图示的在超长型带式扬声器上， 如带状振膜达 300毫米以上长度时， 在振膜的中部可以安置一对或多对曲面弹性体， 以进一 步支撑和稳定柔性振膜。 如图 9所示： 在平膜扬声器中， 包括曲面弹性体 1和 2的分体式支承结构的位置通常在柔性导电线路 27与振膜固定圈之间。
此外， 在扬声器振膜为柔性振膜的情况下， 第一弹性体 1和第二弹性体 2 的曲面形状的最小曲率半径大于或等于柔性振膜 7的最小允许折弯半径。同时， 第一和第二弹性体的剖面曲线的线长度与剖面的直线长度之差大于或等于柔 性振膜在最大振幅时振膜的线长度与振膜在最小振幅时振膜线长度之差。
图 3示出了根据本发明的第二实施例的扬声器振膜的支承结构。 图 3所示 的同样是一种分体式的扬声器振膜支承结构。 与图 2所示结构不同的是， 图 3 中的扬声器振膜为刚性振膜 8， 其具有一个刚性的被支承部 3-2。而其中的第一 曲面弹性体 9和第二曲面弹性体 10均为中空的弹性块， 该弹性块由高分子材 料弹性材料制成。 同样地， 扬声器的刚性振膜 8的被支承部 3-2被夹设在第一 曲面弹性体 9的第一对合面和第二曲面弹性体 10的第二对合面的之间， 从而 达到支承和保持扬声器振膜的目的。 如图所示， 第一空心曲面弹性体 9具有凸 出的曲面形状， 第二空心曲面弹性体 10 具有凹进的曲面形状， 两个弹性体 9 和 10的曲面是能够相互配合的，刚性振膜的被支承部 3-2被夹设在两个互补的 曲面之间， 并且刚性振膜的被支承部 3-2具有与曲面弹性体 9、 10的曲面相匹 配的形状。 同时， 为使空心曲面弹牲体被压缩时保持径向稳定性， 空心曲面弹 性体可制成鼓形结构。同样地，刚性振膜的被支承部 3-2和第一、第二弹性体 9、 10之间构成为分体式的结构， 即， 它们之间不再具有例如粘合剂之类的固定连 接手段。
第一曲面弹性体 9可以通过嵌入法固定在第一固定件 4中， 而第二曲面弹 性体 10可以通过粘胶剂固定在第二固定件 5中。 固定件与弹性体之间的连接 方式可以根据使用环境和制造工艺进行选择， 并不是唯一限定的。
再次说明， 图 3所示的分体式支承结构是刚性的振膜支承部 3-2与曲面弹 性体 9、 10的组合， 这种支承结构可承受振动而且保持其曲面形状。 曲面弹性 体支承结构允许刚性振膜在垂直轴 (与振膜平面垂直)方向的策动力作用下振 动， 曲面弹性体支承结构又能稳定刚性振膜的径向位置。
当扬声器振膜为刚性振膜时， 曲面弹性体的最小弹性应当大于或等于扬声 器振膜的最大振幅。
图 4示出了根据本发明第三实施例的一种金属薄片式的振膜支承结构。这 种支承结构包括一第一对合面的第一金属曲面弹性体 16和一第二对合面的第 二金属曲面弹性体 17，这两个金属曲面弹性体 16和 17的对合面均具有 S形的 配合曲面，这两个对合面之间能夹设一振膜并互补地配合在一起。需说明的是， 被支承部和第一、 第二弹性体 16、 17之间构成为分体式的结构， 即， 它们之 间不再具有例如粘合剂之类的固定连接手段。
第一和第二金属曲面弹性体分别具有弹性体固定段 14和 15， 以便采用焊 接、 紧固件、 或嵌入插槽等方式连接的方式固定到扬声器本体上。 在图示的实 施例中， 金属曲面弹性体夹设着一柔性振膜 7。 同样地， 这种金属曲面弹性体 同样也可以用于支持并保持刚性振膜 8的定位和刚性振膜的振动。 金属曲面弹 性体可选用磷青铜、 铍铜等材料来制造。
支承结构中弹性体的曲面形状可以为多种类型， 例如波浪形、 正弦波形、
S、 V、 U、 C、 M、 W等多种样式。 ，
根据上述实施例可知， 本发明的分体式支承结构可以用于柔性振膜的扬声 器， 例如带式扬声器、 平膜扬声器以及部分球顶高音扬声器； 同时， 这种支承 结构也可以用于刚性振膜扬声器， 例如图 6所示的锥形扬声器以及如图 7所示 的球顶高音扬声器。 在图 6中， 第一曲面弹性体 1和第二曲面弹性体 2夹持固 定着锥形扬器中的锥形振膜 23 ; 在图 7中， 第一曲面弹性体 1和第二曲面弹性 体 2夹持固定着球顶高音扬声器的的球顶振膜 25。
根据扬声器类型以及振膜构造的不同， 弹性体整体构造可以有多种选择。 图 5示出了其中部分的样式， 其中 18和 19所示为条形的曲面弹性体， 20所示 为圆形曲面弹性体， 21所示为带圆角的方型曲面弹性体， 而 22所示为 "凹" 形的曲面弹性体， 此外， 椭圆形也是可釆用的整体形状。
以上说明是示范性的。 在不脱离本发明的主旨和精神的前提下， 本领域的 技术人员可以作出改变， 例如， 将中空的曲面弹性体与与柔性振膜相结合或者 将实心的曲面弹性体与刚性振膜结合。 本发明的保护范围将由所附权利要求书 确定。

Claims

权利要求
1. 一种扬声器振膜的分体式支承结构， 所述支承结构用于在一扬声器内 支承扬声器振膜的定位和保持扬声器振膜的振动， 其特征在于， 所述分体式支 承结构包括：
第一弹性体， 所述第一弹性体具有一曲面形状的第一对合面；
具有第二对合面的第二弹性体， 所述第二对合面的曲面形状与所述第一对 合面的曲面形状互补匹配； 以及，
扬声器振膜的被支承部；
所述第一弹性体的第一对合面和所述第二弹性体的第二对合面从扬声器 振膜的被支承部的两侧相对对合夹住被支承部。
2. 如权利要求 1 所述的支承结构， 其特征在于， 所述第一弹性体与第二 弹性体之间对合面为曲面， 曲面弹性体的对合面形状为以下形状之一：波浪形、 正弦形、 S形、 U形、 V形、 C形、 W形和 M形；
3. 如权利要求 1 所述的支承结构， 其特征在于， 所述扬声器振膜为柔性 振膜， 所述第一弹性体的第一对合面和所述第二弹性体的第二对合面从所述柔 性振膜的两侧相对对合夹住柔性振膜的被支承部。
4. 如权利要求 3所述的支承结构， 其特征在于， 所述柔性振膜具有将振 膜固定连接到扬声器本体上的固定段， 所述的弹性体的位置设置在所述固定段 的内侧， 并且曲面弹性体设置在柔性振膜的一头或二头。
5. 如权利要求 4所述的支承结构， 其特征在于， 所述扬声器为带式扬声 器上，所述振膜的长度不小于 300毫米，在振膜的中部还包括至少一对弹性体， 所述弹性体具有曲面形状的互补对合面并从两侧夹住所述振膜。
6. 如权利要求 1 所述的支承结构， 其特征在于， 所述扬声器为平膜扬声 器中， 曲面弹性体支承结构的位置在柔性导电线路与振膜固定圈之间。
7. 如权利要求 1 所述的支承结构， 其特征在于， 所述扬声器振膜为刚性 振膜， 所述第一弹性体的第一对合面和所述第二弹性体的第二对合面从所述刚 性振膜的两侧相对对合夹住刚性振膜的被支承部。
8. 如权利要求 1 所述的支承结构， 其特征在于， 所述第一弹性体和所述 第二弹性体的所述曲面形状的最小曲率半径大于或等于所述柔性振膜的最小 允许折弯半径。
9. 如权利要求 1 所述的支承结构， 其特征在于， 所述第一、 第二弹性体 的剖面曲线的线长度与剖面的直线长度之差大于或等于柔性振膜在最大振幅 时柔性振膜的线长度与柔性振膜在最小振幅时柔性振膜的线长度之差。
10. 如权利要求 7所述的支承结构， 其特征在于， 曲面弹性体的最小弹性 应大于或等于扬声器振膜的最大振幅。
PCT/CN2006/003047 2005-12-30 2006-11-13 A separate support structure for loudspeaker diaphragm Ceased WO2007076677A1 (en)

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CN1390431A (zh) * 1999-07-23 2003-01-08 数字声能公司 平板式扬声器
JP2003153378A (ja) * 2001-11-15 2003-05-23 Sony Corp スピーカ装置

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EP1976331B1 (en) 2013-12-11
US8094863B2 (en) 2012-01-10
CN1992996B (zh) 2012-02-29
CN1992996A (zh) 2007-07-04
EP1976331A1 (en) 2008-10-01
EP1976331A4 (en) 2010-03-03
US20090010480A1 (en) 2009-01-08
DK1976331T3 (da) 2014-01-20

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