WO2022068014A1 - 辅助振膜及发声器件 - Google Patents

辅助振膜及发声器件 Download PDF

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Publication number
WO2022068014A1
WO2022068014A1 PCT/CN2020/129792 CN2020129792W WO2022068014A1 WO 2022068014 A1 WO2022068014 A1 WO 2022068014A1 CN 2020129792 W CN2020129792 W CN 2020129792W WO 2022068014 A1 WO2022068014 A1 WO 2022068014A1
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WO
WIPO (PCT)
Prior art keywords
curve
fixing
auxiliary diaphragm
fixed
sound
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2020/129792
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English (en)
French (fr)
Inventor
章超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AAC Technologies Holdings Shenzhen Co Ltd
AAC Microtech Changzhou Co Ltd
Original Assignee
AAC Acoustic Technologies Shenzhen Co Ltd
AAC Microtech Changzhou Co Ltd
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 AAC Acoustic Technologies Shenzhen Co Ltd, AAC Microtech Changzhou Co Ltd filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2022068014A1 publication Critical patent/WO2022068014A1/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
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Definitions

  • the invention relates to the field of electro-acoustic conversion, in particular to an auxiliary diaphragm and a sound-emitting device used in portable electronic products.
  • the sound-generating device of the related art includes a basin frame, a vibration system respectively fixed to the basin frame and a magnetic circuit system with a magnetic gap; the vibration system includes a diaphragm fixed to the basin frame and a vibrating membrane inserted into the The magnetic gap is used to drive the voice coil of the vibrating membrane to vibrate and produce sound, and the elastic support component fixed to the basin frame and connected with the end of the voice coil away from the vibrating membrane.
  • the magnetic circuit system includes a magnetic yoke connected to the basin frame, a main magnetic steel and an auxiliary magnetic steel fixed on the magnetic yoke, the main magnetic steel and the auxiliary magnetic steel are arranged at intervals and form the magnetic steel together. gap.
  • the elastic support assembly includes an elastic piece and an auxiliary diaphragm attached to the elastic piece.
  • the auxiliary diaphragm includes a folded ring portion with an arc-shaped cross-section, and a first fixed portion and a second fixed portion respectively extending from opposite sides of the folded ring portion and used for fixed connection.
  • the fixing part is connected to the basin frame, and the second fixing part is connected to the voice coil.
  • the auxiliary diaphragm in the sound-emitting device in the related art includes a ring portion and two connecting portions respectively extending from opposite sides of the ring portion.
  • the auxiliary diaphragm has two opposite end faces, each of which is perpendicular to the connecting edge of the folded ring portion and the connecting portion.
  • This structure makes the area of the folded ring portion close to the port and at the same time close to the connecting portion. The stress level is high, and the sound is produced.
  • the auxiliary diaphragm in this area is prone to film rupture, thereby causing the risk of failure of the auxiliary diaphragm, thereby causing the sound-emitting device to fail and reduce reliability.
  • the purpose of the present invention is to overcome the above-mentioned technical problems and provide an auxiliary diaphragm and a sound-emitting device with high reliability.
  • the present invention provides an auxiliary diaphragm, which is bent and extended from a starting end to an end, and the auxiliary diaphragm includes a first fixing portion and a second fixing portion arranged opposite to the first fixing portion and spaced apart from the first fixing portion.
  • the folded ring portion connecting the first fixed portion and the second fixed portion in the orthographic projection of the auxiliary diaphragm along its vibration direction, at the starting end and/or the end, the folded ring
  • the part is recessed inward relative to the first fixing part and the second fixing part located at the same end, and a section of the folded ring part connecting the first fixing part is in the shape of a curve and defines the curve as the first curve, A section of the folded ring portion connected to the second fixed portion is in the shape of a curve, and the curve is defined as a second curve.
  • the included angle formed between the ring portion and the connecting surface of the first fixing portion is an acute angle, and the tangent of the second curve at the position where it is connected to the second fixing portion is different from the ring portion and the first fixing portion.
  • the included angle formed between the connecting surfaces of the two fixing parts is an acute angle.
  • the folded ring portion is in the form of a circular arc, a continuous extension of multiple circular arcs, and a connected extension of multiple segments. Either a polyline or a spline.
  • the folded ring portion is made of a single-layer material or a multi-layer material.
  • the auxiliary diaphragm is made of thermoplastic material, PET (polyethylene terephthalate), PEI (etherimide), PEN (polyethylene naphthalate) or PAR ( Polyarylate)), thermoplastic polyurethane material, thermoplastic elastomer material, at least one of rubber material.
  • the present invention also provides a sound-generating device, which includes a basin frame, a vibration system respectively fixed to the basin frame, and a magnetic circuit system for driving the vibration system to vibrate and emit sound.
  • a voice coil that is attached to the vibrating membrane and drives the vibrating membrane to vibrate and sound, and the auxiliary vibrating membrane according to any one of the above, the auxiliary vibrating membrane elastically supports the voice coil, and the first fixing part is fixed to the A basin frame, wherein the second fixing portion is fixed on one end of the voice coil away from the vibrating membrane.
  • the vibration system further includes an elastic member fixed to the basin frame and connected to the end of the voice coil away from the vibrating membrane, the auxiliary vibrating membrane is attached to the end of the elastic member away from the vibrating membrane side;
  • the elastic member includes a first fixed arm fixed to the basin frame, a second fixed arm connected to the voice coil, and two elastic arms connected to the first fixed arm and the second fixed arm;
  • the second fixing portion is attached to the first fixing arm, the first fixing portion is attached to the second fixing arm, and the folding ring portion is opposite to and spaced apart from the two elastic arms.
  • the ring portion is concave and formed in a direction away from the diaphragm.
  • the voice coil is in the shape of a rectangle, and the auxiliary diaphragms include two and are respectively located on opposite sides of the short axis of the voice coil.
  • the folded ring portion of the auxiliary diaphragm is positioned relative to the first fixed portion and the first fixed portion located at the same end.
  • the second fixing portion is recessed inwardly, so that the ring portion and the first fixing portion and the second fixing portion at the same end are not located on the same line; and are arranged on the same end face of the auxiliary diaphragm , the first curve is connected to the tangent of the end face of the first fixing part, and the angle formed between the ring part and the connecting surface of the first fixing part is an acute angle, and the second curve
  • the tangent line connected to the position of the end surface of the second fixing part forms an acute angle with the included angle formed between the ring part and the connecting surface of the second fixing part.
  • This structure effectively reduces the stress level in the area where the folded ring portion of the auxiliary diaphragm is close to the included angle, and when the sound-generating device has a large amplitude, it reduces the occurrence of film rupture of the auxiliary diaphragm in this area, thereby reducing the auxiliary diaphragm. There is a risk of failure of the diaphragm, resulting in good reliability of the sound-emitting device.
  • Fig. 1 is the three-dimensional structure schematic diagram of the auxiliary diaphragm of the present invention
  • FIG. 2 is a schematic three-dimensional structure diagram of another angle of the auxiliary diaphragm of the present invention.
  • Fig. 3 is the partial enlarged schematic diagram shown along part B in Fig. 2;
  • FIG. 4 is a schematic structural diagram of a sound-emitting device of the present invention.
  • Fig. 5 is the partial three-dimensional structure exploded view of the sounding device of the present invention.
  • FIG. 6 is a schematic diagram of the assembly structure of the auxiliary diaphragm and the elastic member of the sound-emitting device of the present invention.
  • the present invention provides an auxiliary diaphragm 100 .
  • the auxiliary diaphragm 100 is bent and extended from the starting end 101 to the end 102 .
  • the auxiliary diaphragm 100 includes a first fixing portion 1 , a ring portion 2 and a second fixing portion 3 .
  • the first fixing part 1 and the second fixing part 3 are arranged at intervals relative to each other. Both the first fixing part 1 and the second fixing part 3 are used for fixed connection, so as to fix the auxiliary diaphragm 100 . The first fixing part 1 and the second fixing part 3 are used to improve the rocking performance of the auxiliary diaphragm 100 .
  • the ring portion 2 is used to improve the vibration strength and amplitude of the auxiliary diaphragm 100 .
  • the folding ring portion 2 is connected to the first fixing portion 1 and the second fixing portion 3 .
  • the ring portion 2 in the orthographic projection of the auxiliary diaphragm 100 along its vibration direction, at the starting end 101 and/or the end 102 , is in the form of a circular arc and a continuous multi-segment circle. Any of arcs, polylines connecting extensions, and splines. That is to say, the orthographic projections of the starting end 101 and the end 102 along the vibration direction of the ring portion 2 are respectively an arc, a continuous arc, a connecting and extending polyline, and a spline curve. any kind.
  • the structure of the folded ring portion 2 is helpful for the designer to select the specific shape of the structure of the folded ring portion 2 to improve the vibration intensity and amplitude according to the performance requirements of the actual sound.
  • the folded ring portion 2 is in the shape of a circular arc, and this structure is beneficial to improve the vibration strength and amplitude of the auxiliary diaphragm 100 , and it is also easy to manufacture and assemble, which is beneficial to improve production efficiency and yield.
  • the starting end 101 and/or the end 102 of the auxiliary diaphragm 100 are set, Specifically, in the orthographic projection of the auxiliary diaphragm 100 along its vibration direction, at the starting end 101 and/or the end 102 , the ring portion 2 is opposite to the first fixing portion 1 located at the same end. and the second fixing portion 3 is recessed inward.
  • the ring portion 2 is recessed inward, so that the ring portion 2 and the first fixing portion 1 and the second fixing portion at the same end are Sections 3 are not located on the same straight line.
  • a section of the folded ring part 2 connected to the first fixed part 1 is in the shape of a curve and the curve is defined as the first curve a;
  • the folded ring part 2 is connected to a section of the second fixed part 3 It is in the shape of a curve and defines the curve as the second curve b.
  • the tangent of the first curve a at the position connected to the first fixing part 1 is an acute angle with the included angle a1 formed between the connecting surface of the folding ring part 2 and the first fixing part 1, so
  • the tangent of the second curve b at the position connected to the second fixing portion 3 is an acute angle with the included angle b1 formed between the connecting surface of the loop portion 2 and the second fixing portion 3 .
  • This structure effectively reduces the stress level in the area of the folded ring portion 2 of the auxiliary diaphragm 100 close to the included angle, and reduces the occurrence of membrane rupture of the auxiliary diaphragm 100 in this area when the sound-generating device has a large amplitude.
  • the risk of failure of the auxiliary diaphragm 100 is reduced, so that the reliability of the sound-emitting device is improved.
  • connection between the ring portion 2 and the first fixing portion 1 forms a curve, and the curve is defined as the first curve a.
  • the connection between the ring portion 2 and the second fixing portion 3 forms a curve, and the curve is defined as the second curve b.
  • the line segment L1 is an extension straight line of the connecting surface of the loop portion 2 and the first fixing portion 1 ; the line segment L2 is the tangent of the first curve a at the position connected to the first fixing portion 1 .
  • the included angle between the line segment L1 and the line segment L2 is the included angle a1, and the included angle a1 is an acute angle.
  • the line segment L3 is the extension straight line of the connecting surface of the loop portion 2 and the second fixing portion 3 ;
  • the line segment L4 is the tangent of the second curve b at the position connected to the second fixing portion 3 .
  • the included angle between the line segment L3 and the line segment L4 is an included angle b1, and the included angle b1 is an acute angle.
  • the folding ring portion 2 is made of a single-layer material or a multi-layer material.
  • the single-layer material or the multi-layer material can increase the toughness of the ring portion 2 .
  • the folding ring portion 2 is made of multi-layer materials, which has better toughness performance, thereby improving the reliability of the auxiliary diaphragm 100 .
  • the folded ring portion 2 is made of a single-layer material, which can ensure the toughness and at the same time be easy to process.
  • the specific material to be used needs to be selected by those skilled in the art according to actual needs.
  • the auxiliary diaphragm 100 of the present invention is made of thermoplastic materials (PEEK (polyetheretherketone), PET (polyethylene terephthalate), PEI (etherimide), PEN (polynaphthalene dicarboxylic acid) Glycol ester) or PAR (polyarylate)), thermoplastic polyurethane materials (polyester polyurethane, polyether polyurethane, polyether ester polyurethane, acrylic resin modified polyurethane, silicone modified polyurethane), thermoplastic elasticity Body materials (polyester thermoplastic elastomers, polyether thermoplastic elastomers, polyamide thermoplastic elastomers, polystyrene thermoplastic elastomers), rubber materials (silicone rubber, triethylene propylene rubber, ethylene acrylate rubber , acrylate rubber, etc.) at least one. Of course, its material is not limited to this, but also includes polymer materials similar to the above structures.
  • the present invention further provides a sound-generating device 200 , the sound-generating device 200 includes a basin frame 4 , a vibration system 5 and a magnetic circuit system 6 .
  • the vibration system 5 is fixed to the basin frame 4 .
  • the vibration system 5 includes the auxiliary diaphragm 100 , the diaphragm 51 , the voice coil 52 and the elastic member 53 .
  • the first fixing portion 1 of the auxiliary diaphragm 100 is fixed to the basin frame 4 , and the second fixing portion 3 is fixed to the end of the voice coil 52 away from the diaphragm 51 . Therefore, the auxiliary diaphragm 100 elastically supports the voice coil 52 .
  • the auxiliary diaphragm 100 is the auxiliary diaphragm 100 of the present invention.
  • the diaphragm 51 is used for vibrating and producing sound.
  • the cross section of the ring portion 2 of the auxiliary diaphragm 100 is in a concave structure.
  • the ring portion 2 is concave and formed in a direction away from the diaphragm 51 .
  • the recess means that the ring portion 2 is formed in a direction away from the diaphragm 51 , that is, the recess means that the ring portion 2 is formed in a direction close to the magnetic circuit system 6 .
  • the voice coil 52 is fixed to the diaphragm 51 and drives the diaphragm 51 to vibrate and produce sound.
  • the voice coil 52 is rectangular, and the auxiliary diaphragms 100 include two and are located on opposite sides of the short axis of the voice coil 52 respectively. This structure is beneficial to the symmetry of the auxiliary diaphragm 100 , thereby effectively improving the acoustic performance of the auxiliary diaphragm 100 and the sound generating device 200 such as pure sound.
  • the elastic member 53 is fixed to the basin frame 4 and is connected to the end of the voice coil 52 away from the diaphragm 51 .
  • the auxiliary diaphragm 100 is attached to the side of the elastic member 53 away from the diaphragm 51 .
  • this structure is used to strengthen the vibration effect of the diaphragm 51 and improve the acoustic performance of the sounding device 200 , and on the other hand, it is used to balance the swing of the vibration system 5 and improve the stability of the sounding device 200 .
  • the elastic member 53 includes a first fixed arm 531 fixed to the basin frame 4 , a second fixed arm 532 connected to the voice coil 52 , and a first fixed arm 531 and a second fixed arm 532 connected to the voice coil 52 .
  • the second fixing portion 3 is attached to the first fixing arm 531
  • the first fixing portion 1 is attached to the second fixing arm 532
  • the folding ring portion 2 and the two elastic arms 533 Opposite and spaced from each other.
  • the magnetic circuit system 6 drives the vibration system 5 to vibrate and sound.
  • the folded ring portion of the auxiliary diaphragm is positioned relative to the first fixed portion and the first fixed portion located at the same end.
  • the second fixing portion is recessed inwardly, so that the ring portion and the first fixing portion and the second fixing portion at the same end are not located on the same line; and are arranged on the same end face of the auxiliary diaphragm , the first curve is connected to the tangent of the end face of the first fixing part, and the angle formed between the ring part and the connecting surface of the first fixing part is an acute angle, and the second curve
  • the tangent line connected to the position of the end surface of the second fixing part forms an acute angle with the included angle formed between the ring part and the connecting surface of the second fixing part.
  • This structure effectively reduces the stress level in the area where the folded ring portion of the auxiliary diaphragm is close to the included angle, and when the sound-generating device has a large amplitude, it reduces the occurrence of film rupture of the auxiliary diaphragm in this area, thereby reducing the auxiliary diaphragm. There is a risk of failure of the diaphragm, resulting in good reliability of the sound-emitting device.

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

Abstract

本发明提供一种辅助振膜，其自起始端弯折延伸至末端，其包括第一固定部、第二固定部及折环部；辅助振膜沿其振动方向的正投影中，在起始端和/或末端，折环部相对于位于同一端的第一固定部和第二固定部向内凹陷，折环部连接第一固定部的一段呈一曲线状并定义为第一曲线，折环部连接第二固定部的一段呈一曲线状并定义为第二曲线，第一曲线在连接至第一固定部位置处的切线，与折环部和第一固定部的连接面之间形成的夹角呈锐角；第二曲线在连接至第二固定部位置处的切线，与折环部和第二固定部的连接面之间形成的夹角呈锐角。本发明还提供一种应用辅助振膜的发声器件，与相关技术相比，本发明的辅助振膜及发声器件的可靠性好。

Description

辅助振膜及发声器件 技术领域
本发明涉及电声转换领域，尤其涉及一种运用于便携式电子产品的辅助振膜及发声器件。
 背景技术
随着移动互联网时代的到来，智能移动设备的数量不断上升。而在众多移动设备之中，手机无疑是最常见、最便携的移动终端设备。目前，手机的功能极其多样，其中之一便是高品质的音乐功能，因此，用于播放声音的发声器件被大量应用到现在的智能移动设备之中。
相关技术的所述发声器件包括盆架和分别固定于所述盆架的振动系统及具有磁间隙的磁路系统；所述振动系统包括固定于所述盆架的振膜以及插设于所述磁间隙以驱动所述振膜振动发声的音圈以及固定于所述盆架并与所述音圈远离所述振膜一端连接的弹性支撑组件。所述磁路系统包括连接于所述盆架的磁轭、固定于所述磁轭的主磁钢和副磁钢，所述主磁钢与所述副磁钢间隔设置并共同形成所述磁间隙。所述弹性支撑组件包括弹性件以及贴设于所述弹性件的辅助振膜。所述辅助振膜包括横截面呈弧形结构的折环部以及由所述折环部的相对两侧分别延伸的且用于固定连接的第一固定部和第二固定部，所述第一固定部连接于所述盆架，所述第二固定部连接于所述音圈。
然而，相关技术中的所述发声器件中的所述辅助振膜包括折环部和由所述折环部的相对两侧分别延伸的两个连接部。所述辅助振膜具有相对两个端面，每一所述端面分别与折环部与连接部的连接边线垂直，该结构使得折环部靠近端口并同时靠近连接部的区域应力水平高，在发声器件大振幅的情况下，该区域的辅助振膜容易出现破膜的情况，从而使得辅助振膜产生失效的风险，从而使得发声器件失效且可靠性降低。
因此，实有必要提供一种新的辅助振膜及发声器件解决上述技术问题。
 技术问题
本发明的目的是克服上述技术问题，提供一种可靠性高的辅助振膜及发声器件。
 技术解决方案
为了实现上述目的，本发明提供一种辅助振膜，其自起始端弯折延伸至末端，所述辅助振膜包括第一固定部、与所述第一固定部相对间隔设置的第二固定部以及连接所述第一固定部和所述第二固定部的折环部，所述辅助振膜沿其振动方向的正投影中，在所述起始端和/或所述末端，所述折环部相对于位于同一端的所述第一固定部和所述第二固定部向内凹陷，所述折环部连接所述第一固定部的一段呈一曲线状并定义该曲线为第一曲线，所述折环部连接所述第二固定部的一段呈一曲线状并定义该曲线为第二曲线，所述第一曲线在连接至所述第一固定部位置处的切线，与所述折环部和所述第一固定部的连接面之间形成的夹角呈锐角，所述第二曲线在连接至所述第二固定部位置处的切线，与所述折环部和所述第二固定部的连接面之间形成的夹角呈锐角。
优选的，所述辅助振膜沿其振动方向的正投影中，在所述起始端和/或所述末端，所述折环部呈一段圆弧、连续延伸的多段圆弧、连接延伸的多段折线以及样条曲线中的任意一种。
优选的，所述折环部为单层材料或者多层材料制成。
优选的，所述辅助振膜由由热塑性塑料类材料、PET(聚对苯二甲酸乙二醇酯)、PEI(醚酰亚胺)、PEN(聚萘二甲酸乙二醇酯)或PAR(聚芳酯)），热塑性聚氨酯类材料，热塑性弹性体类材料，橡胶类材料中的至少一种制成。
本发明还提供一种发声器件，其包括盆架、分别固定于所述盆架的振动系统和驱动所述振动系统振动发声的磁路系统，其特征在于，所述振动系统包括振膜、固定于所述振膜并驱动所述振膜振动发声的音圈以及如上任意一项所述的辅助振膜，所述辅助振膜弹性支撑所述音圈，所述第一固定部固定于所述盆架，所述第二固定部固定于所述音圈远离所述振膜一端。
优选的，所述振动系统还包括固定于所述盆架并与所述音圈远离所述振膜一端连接的弹性件，所述辅助振膜贴合于所述弹性件远离所述振膜一侧；所述弹性件包括固定于所述盆架的第一固定臂、连接于所述音圈的第二固定臂以及连接所述第一固定臂和第二固定臂的两个弹臂；所述第二固定部贴合于所述第一固定臂，所述第一固定部贴合于所述第二固定臂，所述折环部与两个所述弹臂正对且相互间隔。
优选的，所述折环部向远离所述振膜的方向凹陷成型。
优选的，所述音圈呈矩形，所述辅助振膜包括两个且分别位于所述音圈短轴相对两侧。
 有益效果
与现有技术相比，本发明的辅助振膜及运用该辅助振膜的发声器件中，将所述辅助振膜的所述折环部相对于位于同一端的所述第一固定部和所述第二固定部向内凹陷设置，使得所述折环部和与其同端的所述第一固定部及所述第二固定部不位于同一直线上；并在所述辅助振膜的同一端面中设置，所述第一曲线连接至所述第一固定部的端面位置的切线，与所述折环部和所述第一固定部的连接面之间形成的夹角呈锐角，所述第二曲线连接至所述第二固定部的端面位置的切线，与所述折环部和所述第二固定部的连接面之间形成的夹角呈锐角。该结构有效降低所述辅助振膜的折环部靠近所述夹角的区域应力水平，并在发声器件大振幅的情况下，降低辅助振膜在该区域的出现破膜的情况，从而减少辅助振膜产生失效的风险，从而使得发声器件的可靠性好。
 附图说明
为了更清楚地说明本发明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发明的一些实施例，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为本发明辅助振膜的立体结构示意图；
图2为本发明辅助振膜另一角度的立体结构示意图；
图3为沿图2中B部分所示的局部放大示意图；
图4为本发明发声器件的结构示意图；
图5为本发明发声器件的部分立体结构分解图；
图6为本发明发声器件的辅助振膜与弹性件的装配结构示意图。
 本发明的实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
请同时参阅图1-3所示，本发明提供一种辅助振膜100。所述辅助振膜100，自起始端101弯折延伸至末端102，所述辅助振膜100包括第一固定部1、折环部2以及第二固定部3。
所述第一固定部1和所述第二固定部3相对间隔设置。所述第一固定部1和所述第二固定部3均用于固定连接，从而使所述辅助振膜100固定。所述第一固定部1和所述第二固定部3用于改善所述辅助振膜100的摇摆性。
所述折环部2用于提高所述辅助振膜100的振动力度和幅度。具体的，所述折环部2连接所述第一固定部1和所述第二固定部3。
本实施方式中，所述辅助振膜100沿其振动方向的正投影中，在所述起始端101和/或所述末端102，所述折环部2呈一段圆弧、连续延伸的多段圆弧、连接延伸的多段折线以及样条曲线中的任意一种。也就是说，所述起始端101和所述末端102分别沿所述折环部2振动方向的正投影呈一段圆弧、连续延伸的多段圆弧、连接延伸的多段折线以及样条曲线中的任意一种。所述折环部2的结构有利于设计者根据实际发声的性能要求，选择所述折环部2的结构的具体形状提高的振动力度和幅度。本实施方式中，所述折环部2的为呈一段圆弧，该结构有利于提高所述辅助振膜100的振动力度和幅度，还可以易于制造和组装，有利于提高生产效率和良率。
为了降低所述辅助振膜100出现破膜的情况，从而减少所述辅助振膜100产生失效的风险，对所述辅助振膜100的所述起始端101和/或所述末端102进行设置,具体为：所述辅助振膜100沿其振动方向的正投影中，在所述起始端101和/或所述末端102，所述折环部2相对于位于同一端的所述第一固定部1和所述第二固定部3向内凹陷。所述辅助振膜100沿其振动方向的正投影中，所述折环部2呈向内凹陷且使得所述折环部2和与其同端的所述第一固定部1及所述第二固定部3不位于同一直线上。
并同时设置：所述折环部2连接所述第一固定部1的一段呈一曲线状并定义该曲线为第一曲线a，所述折环部2连接所述第二固定部3的一段呈一曲线状并定义该曲线为第二曲线b。所述第一曲线a在连接至所述第一固定部1位置处的切线，与所述折环部2和所述第一固定部1的连接面之间形成的夹角a1呈锐角，所述第二曲线b在连接至所述第二固定部3位置处的切线，与所述折环部2和所述第二固定部3的连接面之间形成的夹角b1呈锐角。该结构有效降低所述辅助振膜100的折环部2靠近所述夹角的区域应力水平，并在发声器件大振幅的情况下，降低辅助振膜100在该区域的出现破膜的情况，从而减少辅助振膜100产生失效的风险，从而使得发声器件的可靠性好。
请参阅图3所示，所述折环部2与所述第一固定部1连接处呈一曲线，并定义该曲线为第一曲线a。所述折环部2与所述第二固定部3连接处呈一曲线，并定义该曲线为第二曲线b。
以所述起始端101为例:
线段L1为所述折环部2和所述第一固定部1的连接面的延伸直线；线段L2为所述第一曲线a在连接至所述第一固定部1位置处的切线。线段L1与线段L2的夹角为夹角a1，夹角a1为锐角。该结构使得所述折环部2在靠近所述起始端101并同时靠近连所述第一固定部1的区域D的应力水平降低。其中，所述区域D为所述折环部2易于出现破膜的区域。
同理，线段L3为所述折环部2和所述第二固定部3的连接面的延伸直线；线段L4为所述第二曲线b在连接至所述第二固定部3位置处的切线。线段L3与线段L4的夹角为夹角b1，夹角b1为锐角。该结构使得所述折环部2在靠近所述起始端101并同时靠近连所述第二固定部3的区域C的应力水平降低。其中，所述区域C为所述折环部2易于出现破膜的区域。
所述折环部2为单层材料或者多层材料制成。为了降低所述辅助振膜100在该区域的出现破膜的情况，所述单层材料或者所述多层材料均能增大所述折环部2的坚韧度。本实施方式中，所述折环部2为多层材料制成的坚韧度性能更好，从而提高了所述辅助振膜100的可靠性。当然，不限于此，所述折环部2采用单层材料制成也可以保证坚韧度的基础上，同时也易于加工。具体采用哪种材料，需要有本领域技术人员根据实际需进行选择。
本发明的所述辅助振膜100由热塑性塑料类材料（PEEK(聚醚醚酮)、PET(聚对苯二甲酸乙二醇酯)、PEI(醚酰亚胺)、PEN(聚萘二甲酸乙二醇酯)或PAR(聚芳酯)），热塑性聚氨酯类材料（聚酯类聚氨酯、聚醚类聚氨酯、聚醚酯类聚氨酯、丙烯酸树脂改性聚氨酯、有机硅改性聚氨酯），热塑性弹性体类材料（聚酯类热塑性弹性体、聚醚类热塑性弹性体、聚酰胺类热塑性弹性体、聚苯乙烯类热塑性弹性体），橡胶类材料(硅橡胶、三乙丙橡胶、乙烯丙烯酸酯橡胶、丙烯酸酯橡胶等)中的至少一种制成。当然，其材料不限于此，还包括与上述结构类似的高分子材料。
请同时参阅图4-6所示，本发明还提供一种发声器件200，所述发声器件200包括盆架4、振动系统5以及磁路系统6。
所述振动系统5固定于所述盆架4。具体的，所述振动系统5包括所述辅助振膜100、所述振膜51、所述音圈52以及弹性件53。
所述辅助振膜100的所述第一固定部1固定于所述盆架4，所述第二固定部3固定于所述音圈52远离所述振膜51一端。从而使得所述辅助振膜100弹性支撑所述音圈52。其中，所述辅助振膜100为本发明所述的辅助振膜100。
所述振膜51用于振动发声。其中，所述辅助振膜100的所述折环部2的横截面呈凹陷结构。具体的，所述折环部2向远离所述振膜51的方向凹陷成型。所述凹陷指所述折环部2向远离所述振膜51的方向形成，也就是说所述凹陷指所述折环部2靠近所述磁路系统6方向形成。
所述音圈52固定于所述振膜51并驱动所述振膜51振动发声。在本实施方式中，所述音圈52呈矩形，所述辅助振膜100包括两个且分别位于所述音圈52短轴相对两侧。该结构有利于所述辅助振膜100的对称性，从而有效提高了所述辅助振膜100及所述发声器件200的纯音等声学性能。
所述弹性件53固定于所述盆架4并与所述音圈52远离所述振膜51一端连接。所述辅助振膜100贴合于所述弹性件53远离所述振膜51一侧。该结构一方面用于加强所述振膜51的振动效果，改善所述发声器件200的声学性能，另一方面用于平衡所述振动系统5的摇摆，提高所述发声器件200的稳定性。
在本实施方式中，所述弹性件53包括固定于所述盆架4的第一固定臂531、连接于所述音圈52的第二固定臂532以及连接所述第一固定臂531和第二固定臂532的两个弹臂533。所述第二固定部3贴合于所述第一固定臂531，所述第一固定部1贴合于所述第二固定臂532，所述折环部2与两个所述弹臂533正对且相互间隔。
所述磁路系统6驱动所述振动系统5振动发声。
与现有技术相比，本发明的辅助振膜及运用该辅助振膜的发声器件中，将所述辅助振膜的所述折环部相对于位于同一端的所述第一固定部和所述第二固定部向内凹陷设置，使得所述折环部和与其同端的所述第一固定部及所述第二固定部不位于同一直线上；并在所述辅助振膜的同一端面中设置，所述第一曲线连接至所述第一固定部的端面位置的切线，与所述折环部和所述第一固定部的连接面之间形成的夹角呈锐角，所述第二曲线连接至所述第二固定部的端面位置的切线，与所述折环部和所述第二固定部的连接面之间形成的夹角呈锐角。该结构有效降低所述辅助振膜的折环部靠近所述夹角的区域应力水平，并在发声器件大振幅的情况下，降低辅助振膜在该区域的出现破膜的情况，从而减少辅助振膜产生失效的风险，从而使得发声器件的可靠性好。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其它相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (8)

  1. 一种辅助振膜，其自起始端弯折延伸至末端，所述辅助振膜包括第一固定部、与所述第一固定部相对间隔设置的第二固定部以及连接所述第一固定部和所述第二固定部的折环部，其特征在于，所述辅助振膜沿其振动方向的正投影中，在所述起始端和/或所述末端，所述折环部相对于位于同一端的所述第一固定部和所述第二固定部向内凹陷，所述折环部连接所述第一固定部的一段呈一曲线状并定义该曲线为第一曲线，所述折环部连接所述第二固定部的一段呈一曲线状并定义该曲线为第二曲线，所述第一曲线在连接至所述第一固定部位置处的切线，与所述折环部和所述第一固定部的连接面之间形成的夹角呈锐角，所述第二曲线在连接至所述第二固定部位置处的切线，与所述折环部和所述第二固定部的连接面之间形成的夹角呈锐角。
  2. 根据权利要求1所述的辅助振膜，其特征在于，所述辅助振膜沿其振动方向的正投影中，在所述起始端和/或所述末端，所述折环部呈一段圆弧、连续延伸的多段圆弧、连接延伸的多段折线以及样条曲线中的任意一种。
  3. 根据权利要求1所述的辅助振膜，其特征在于，所述折环部为单层材料或者多层材料制成。
  4. 根据权利要求1所述的辅助振膜，其特征在于，所述辅助振膜由热塑性塑料类材料、PET(聚对苯二甲酸乙二醇酯)、PEI(醚酰亚胺)、PEN(聚萘二甲酸乙二醇酯)或PAR(聚芳酯)），热塑性聚氨酯类材料，热塑性弹性体类材料，橡胶类材料中的至少一种制成。
  5. 一种发声器件，其包括盆架、分别固定于所述盆架的振动系统和驱动所述振动系统振动发声的磁路系统，其特征在于，所述振动系统包括振膜、固定于所述振膜并驱动所述振膜振动发声的音圈以及如权利要求1-4任意一项所述的辅助振膜，所述辅助振膜弹性支撑所述音圈，第一固定部固定于所述盆架，所述第二固定部固定于所述音圈远离所述振膜一端。
  6. 根据权利要求5所述的发声器件，其特征在于，所述振动系统还包括固定于所述盆架并与所述音圈远离所述振膜一端连接的弹性件，所述辅助振膜贴合于所述弹性件远离所述振膜一侧；所述弹性件包括固定于所述盆架的第一固定臂、连接于所述音圈的第二固定臂以及连接所述第一固定臂和第二固定臂的两个弹臂；所述第二固定部贴合于所述第一固定臂，所述第一固定部贴合于所述第二固定臂，所述折环部与两个所述弹臂正对且相互间隔。
  7. 根据权利要求6所述的发声器件，其特征在于，所述折环部向远离所述振膜的方向凹陷成型。
  8. 根据权利要求5所述的发声器件，其特征在于，所述音圈呈矩形，所述辅助振膜包括两个且分别位于所述音圈短轴相对两侧。
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