WO2020062692A1 - 振膜、振膜组件以及扬声器 - Google Patents

振膜、振膜组件以及扬声器 Download PDF

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Publication number
WO2020062692A1
WO2020062692A1 PCT/CN2018/125340 CN2018125340W WO2020062692A1 WO 2020062692 A1 WO2020062692 A1 WO 2020062692A1 CN 2018125340 W CN2018125340 W CN 2018125340W WO 2020062692 A1 WO2020062692 A1 WO 2020062692A1
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WIPO (PCT)
Prior art keywords
diaphragm
fixing portion
main body
bending connection
highest point
Prior art date
Application number
PCT/CN2018/125340
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English (en)
French (fr)
Inventor
郑泽东
李培俊
穆瑞祥
李柯
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歌尔股份有限公司
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Publication of WO2020062692A1 publication Critical patent/WO2020062692A1/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
    • 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
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • 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
    • H04R2231/00—Details of apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor covered by H04R31/00, not provided for in its subgroups
    • H04R2231/003—Manufacturing aspects of the outer suspension of loudspeaker or microphone diaphragms or of their connecting aspects to said diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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
    • H04R2307/025—Diaphragms comprising polymeric materials
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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

Definitions

  • Loudspeaker is an important acoustic component in portable electronic equipment. It is used to convert sound wave electrical signals into sound signals and is an energy conversion device.
  • the speaker usually includes a vibration system, a magnetic circuit system, and an auxiliary system, and the vibration system and the magnetic circuit system are housed in the auxiliary system.
  • the vibration system generally includes a combined diaphragm, centering support, and voice coil.
  • the diaphragm and the centering support together form a diaphragm assembly.
  • the centering support is used to connect the diaphragm and the voice coil to ensure sound.
  • the circle is vertical without distortion, which effectively prevents the polarization of the diaphragm.
  • the centering support can also affect the rigidity and compliance of the vibration system, thereby affecting the frequency response of the speaker. It is an important part of the speaker.
  • the centering support piece needs to be combined with the diaphragm. Therefore, when the vibration system vibrates, the folding ring portion of the centering support piece and the diaphragm will be deformed, resulting in a small vibration space of the folding ring portion. , Affects acoustic performance.
  • the main purpose of the present invention is to provide a vibrating membrane.
  • the vibrating membrane is applied to a speaker, the problem of the small vibration space of the vibrating membrane in the speaker in the prior art is solved.
  • the diaphragm includes a central portion, a curved folded ring portion provided around the central portion, and a fixed portion provided around the folded ring portion; the folded ring portion corresponding to the first bending connection portion The highest point of the portion is offset toward the inner fixing portion, and the highest point of the portion corresponding to the folded ring portion and the second bending connection portion is offset toward the outer fixing portion.
  • the main body portion is located between one side portion of the inner fixing portion and one side portion of the outer fixing portion, and the main body portion is parallel to the side portion and the side portion of the inner fixing portion.
  • the edge portion of the external fixing portion is located between one side portion of the inner fixing portion and one side portion of the outer fixing portion, and the main body portion is parallel to the side portion and the side portion of the inner fixing portion.
  • a distance from the main body portion to a side portion of the inner fixing portion is equal to a distance from the main body portion to a side portion of the outer fixing portion.
  • a connection line of the highest point of a portion corresponding to the folding ring portion and the main body portion and a highest point of a portion corresponding to the folding ring portion and the first bending connection portion Smooth transition of the connection;
  • the line connecting the highest point of the portion corresponding to the folding ring portion and the main body portion and the line connecting the highest point of the portion corresponding to the folding ring portion and the second bending connection portion smoothly transition.
  • the diaphragm is provided with a structural layer made of a thermoplastic elastomer material or a silicone rubber material.
  • the present invention also discloses a diaphragm assembly.
  • the diaphragm assembly includes:
  • a centering support, the diaphragm is connected to the centering support
  • the centering support piece includes an inner fixing portion, an outer fixing portion, and a connecting arm.
  • the inner fixing portion and the outer fixing portion are disposed alternately.
  • the connecting arm is provided between the inner fixing portion and the outer fixing portion.
  • the connecting arm includes a main body portion and a first bending connection portion provided at one end of the main body portion, and a second bending connection portion provided at the other end of the main body portion. The first bending connection portion Connected to the internal fixing portion, and the second bending connection portion is connected to the external fixing portion;
  • a central portion of the diaphragm is connected to the inner fixing portion, and a fixing portion of the diaphragm is connected to the outer fixing portion.
  • the inner fixing portion and / or the outer fixing portion are annular.
  • the present invention also discloses a loudspeaker.
  • the loudspeaker includes the diaphragm assembly of any of the above embodiments and a voice coil combined with the diaphragm assembly.
  • the highest point of the portion corresponding to the first bending connection portion and the second bending connection portion of the diaphragm is shifted, so that when the diaphragm is vibrating, the diaphragm ring is vibrated.
  • the portion corresponding to the first bending connection portion and the second bending connection portion has sufficient vibration space, thereby satisfying the acoustic performance of the speaker.
  • the vibration space of the folded ring portion of the diaphragm is increased without increasing the volume of the diaphragm, so as to meet the needs of the miniature speaker.
  • FIG. 1 is a schematic structural diagram of a vibration system according to an embodiment of the present invention.
  • FIG. 3 is a front view of a centering branch in an embodiment of the present invention.
  • FIG. 4 is a perspective view of a combination of a diaphragm and a centering support in an embodiment of the present invention (the dotted line shows the line connecting the highest point of the folded ring portion);
  • FIG. 5 is a sectional view taken along A-A in FIG. 4;
  • Fig. 6 is a sectional view taken along the line C-C in Fig. 4.
  • fixed may be a fixed connection, may be a detachable connection, or be integrated into one; It is a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements, unless it is clearly defined otherwise.
  • fixed may be a fixed connection, may be a detachable connection, or be integrated into one; It is a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements, unless it is clearly defined otherwise.
  • the invention provides a diaphragm.
  • the diaphragm 100 is used to be combined with the centering support piece 200.
  • the centering support piece 200 includes an inner fixing portion 210, an outer fixing portion 220, and a connecting arm 230, which are fixed internally.
  • the part 210 and the outer fixing part 220 are arranged alternately.
  • the connecting arm 230 is provided between the inner fixing part 210 and the outer fixing part 220.
  • the connecting arm 230 includes a main body part 233 and a first bending connection part 231 provided at one end of the main body part 233. And a second bending connection portion 232 provided at the other end of the main body portion 233, the first bending connection portion 231 is connected to the internal fixing portion 210, and the second bending connection portion 232 is connected to the external fixing portion 220;
  • the diaphragm 100 includes a central portion 110, a curved folded-back portion 120 provided around the central portion 110, and a fixed portion 130 provided around the folded-back portion 120; a portion of the folded-back portion 120 corresponding to the first bending connection portion 231 The highest point is shifted toward the inner fixing portion 210, and the highest point of the portion of the folded ring portion 120 corresponding to the second bending connection portion 232 is shifted toward the outer fixing portion 220.
  • the diaphragm 100 is used for combination with the centering support piece 200, that is, the combination of the diaphragm 100 and the centering support piece 200 is a conventional technical means for those skilled in the art.
  • the centering support piece 200 includes an inner fixing portion 210, an outer fixing portion 220, and a connecting arm 230.
  • the three can be fixed by glue bonding or prepared by integral molding.
  • the centering support piece 200 may be made of an insulating substrate, and the insulating substrate may be polyimide, or a polymer material other than polyimide may be selected.
  • a conductive layer needs to be provided on the centering support piece 200, and the conductive layer is used to electrically connect the voice coil 300 and the external circuit of the speaker.
  • the conductive layer may be a copper foil, or may be another metal layer or a graphene conductive layer.
  • the conductive layer is bonded to the centering support piece 200.
  • the copper foil can be cut according to the structure of the centering support piece 200, and then bonded with an adhesive, or the conductive layer can be bonded to the centering support by electroplating, printing or weaving. Centering support piece 200.
  • the vibration system is combined by the diaphragm 100, the centering support piece 200, and the voice coil 300.
  • the voice coil 300 is used to extend into the magnetic gap in the magnetic circuit system.
  • the current flowing through the voice coil 300 is vibrated by the ampere force of different magnitudes, thereby driving the centering piece 200 and the diaphragm 100 to vibrate, that is, centering.
  • the support piece 200 and the diaphragm 100 can vibrate simultaneously.
  • the centering support piece 200 includes an inner fixing portion 210, an outer fixing portion 220, and a connecting arm 230 connecting the inner fixing portion 210 and the outer fixing portion 220.
  • the outer fixing portion 220 of the centering support piece 200 is used to connect with the housing.
  • the inner fixing part 210 is used for fixed connection with the edge of the central part 110 of the voice coil 300 and the diaphragm 100. Therefore, when the centering piece 200 vibrates, the inner fixing part 210 drives the connecting arm 230 to vibrate, so that the first folding The space between the bent connection portion 231 and the second bent connection portion 232 and the folded ring portion 120 of the diaphragm changes with the occurrence of vibration.
  • the voice coil 300 vibrates upward
  • the diaphragm 100 and the centering support piece 200 vibrate upward
  • the inner fixing portion 210 drives the connecting arm 230 to vibrate upward.
  • the first bending connection portion 231 corresponds to the folding ring portion 120 Since the portion near the edge, the vibration space of the folded ring portion 120 of the diaphragm 100 with respect to the portion of the first bent connection portion 231 is small.
  • the vibration space of the folded ring portion 120 of the diaphragm 100 relative to the portion of the first bent connection portion 231 is small, the sound generation effect is bound to be affected.
  • the inner fixing portion 210 drives the connecting arm 230 to vibrate downward, that is, the first bending connection portion 231 vibrates downward.
  • the fixing part 220 is fixed.
  • the inner fixing part 210 drives the connecting arm 230 to vibrate downward, the downward bending amplitude of the second bending connection part 232 is small, and because the second bending connection part 232 and the folding ring part The part near the edge of 120 is opposite. Therefore, when the diaphragm 100 vibrates downward, the vibration space of the folded ring portion 120 of the diaphragm 100 relative to the portion of the second bend connection portion 232 is small, and the sound generation effect is affected.
  • the highest point of the portion corresponding to the folded loop portion 120 and the first and second bending connection portions 231 and 232 is offset. That is, when the inner fixing portion 210 drives the connecting arm 230 to vibrate, there is a portion (point) with the largest vertical amplitude between the first bending connection portion 231 and the second bending connection portion 232, and the corresponding portion of the bending ring portion 120 passes through The highest point of the ring is offset, so that the vibration space of the bending ring portion 120 corresponding to the first bending connection portion 231 and the second bending connection portion 232 can be increased, thereby solving the small vibration space of the bending ring portion 120. problem. As shown in FIG.
  • connection line between the highest points of the folded-back portion 120 is shown by a dotted line, that is, by matching the folded-back portion 120 of the diaphragm with the first and second bending connection portions 231 and 231.
  • 232 forms an avoidance structure, so that when the centering support 200 and the diaphragm 100 are vibrated, the vibration space of the diaphragm can be effectively guaranteed.
  • the vibration space between the connecting arm 230 and the folding ring portion 120 can also be increased, but increasing the overall height of the folding ring portion 120 increases the volume of the entire speaker. Large, inconvenient for miniaturization of speakers.
  • the highest point of the bending ring portion 120 corresponding to the first bending connection portion 231 and the second bending connection portion 232 is offset, that is, the folding ring portion 120 of the diaphragm 110 is connected to the connecting arm 230.
  • the first bending connection portion 231 and the second bending connection portion 232 are formed to avoid the problem. Under the condition that the volume is not changed, the vibration space is increased, and the acoustic performance of the speaker is ensured.
  • the folded ring portion 120 is curved, and provides a certain compliance for the vibration of the central portion 110, that is, a certain flexibility, which makes the central portion 110 more prone to vibration.
  • the folded-back portion 120 by arranging the folded-back portion 120 in a curved shape, it is possible to prevent the diaphragm 100 from breaking due to a sudden change in stress during the vibration process, thereby improving the service life of the diaphragm 100.
  • the curved shape of the folded ring portion 120 may be a semi-circular shape or an arc shape with a certain radian, and it may be set according to actual conditions, which is not limited in the embodiment of the present invention.
  • the offset setting of the highest point of the portion of the folded ring portion 120 corresponding to the first and second bending connection portions 231 and 232 may be such that the cross section of the corresponding portion of the folded ring portion 120 is symmetrically curved.
  • the corresponding portions of the folded ring portion 120 are entirely offset, thereby increasing the vibration space.
  • the arrangement of this form will cause the structure of the centering support piece 200 to change, that is, when the portion of the folding ring portion 120 corresponding to the first bending connection portion 231 and the second bending connection portion 232 is entirely displaced.
  • the inner fixing portion 210 and the outer fixing portion 220 on the centering support 200 must also be offset by a certain distance to be combined with the diaphragm 100, which easily causes a problem of polarization. After the localization of the centering piece 200, the structural strength of the centering piece 200 is also unfavorable, and even the problem of vibration fracture may occur. Therefore, as shown in FIG. 4 to FIG. 6, the cross-section of the portion corresponding to the folded-back portion 120 and the first bending connection portion 231 is asymmetrically curved, and the folded-back portion 120 corresponds to the second bending connection portion 232. The cross section of the part is asymmetrically curved.
  • the portion corresponding to the folding ring portion 120 By setting the portion corresponding to the folding ring portion 120 to be asymmetrically curved, at this time, the highest point of the portion corresponding to the folding ring portion 120 is offset at this time, but it is not necessary to correspond to the folding ring portion 120. The entire position is shifted.
  • the above-mentioned shifting of the corresponding portion of the folded ring portion 120 or the cross-section of the folded ring portion 120 is set in an asymmetric curved shape are both prepared by molding when the diaphragm 100 is prepared.
  • the main body portion 233 is located between one side portion of the inner fixing portion 210 and one side portion of the outer fixing portion 220, and the main body portion 233 is parallel to the side portion of the inner fixing portion 210 and A side portion of the outer fixing portion 220.
  • the main body portion 233 is disposed parallel to the side portion of the inner fixing portion 210 and the side portion of the outer fixing portion 220, so that when the main body portion 233 vibrates with the voice coil, it guarantees its The maximum space between them ensures that the portion of the folded ring portion 120 corresponding to the main body portion 233 has the largest vibration space.
  • a distance from the main body portion 233 to a side portion of the inner fixing portion 210 is equal to a distance from the main body portion 233 to a side portion of the outer fixing portion 220.
  • the highest point of the portion corresponding to the folding ring portion 120 and the first bending connection portion 231 is located inside the center line of the main body portion 233, and the folding ring portion 120 and the second bending portion The highest point of the portion corresponding to the connection portion 232 is located outside the center line of the main body portion 233.
  • the space of the corresponding portions of the folded ring portion 120, the first bending connection portion 231, and the second bending connection portion 232 can be maximized, thereby effectively ensuring the vibration space of the folded ring portion 120. .
  • connection line between the highest point of the portion corresponding to the folded portion 120 and the main body portion 233 and the highest point of the portion corresponding to the folded portion 120 and the first bending connection portion 231 Smooth transition of the connection;
  • connection line between the highest point of the portion corresponding to the folded portion 120 and the main body portion 233 and the connection line between the highest point of the portion corresponding to the folded portion 120 and the second bending connection portion 232 smoothly transitions.
  • the portions corresponding to the first bending connection portion 231, the main body portion 233, and the second bending connection portion 232 are smoothly transitioned to prevent the diaphragm 100 from vibrating during the vibration.
  • the stress suddenly appears and breaks the acoustic performance is guaranteed.
  • connection line between the highest point of the folded ring portion 120 and the portion corresponding to the main body portion 233 is inclined from the first bending connection portion 231 to the second bending connection portion 232, and has a center line with the main body portion 233. Angle.
  • the portion corresponding to the folding portion 120 and the main body portion 233 has a center symmetrical shape, so as to ensure that the portion corresponding to the folding portion 120 and the main body portion 233 smoothly transitions to the first bending connection portion 231 and the second bending connection portion.
  • the position corresponding to 232 ensures that the diaphragm 100 is not easily damaged by vibration.
  • the diaphragm 100 is made of a thermoplastic elastomer material or a silicone rubber material.
  • the structural feature of the thermoplastic elastomer is that the resin segment and the rubber segment are composed of different chemical bonds.
  • the resin segment forms a physical cross-linking point by the force between the chains.
  • the rubber segment is a highly elastic segment and contributes elasticity.
  • Thermoplastic elastomer materials include, but are not limited to, thermoplastic polyester elastomer (TPEE), thermoplastic polyurethane elastomer (TPU), and polyamide-based thermoplastic elastomer (TPAE).
  • TPEE thermoplastic polyester elastomer
  • TPU thermoplastic polyurethane elastomer
  • TPAE polyamide-based thermoplastic elastomer
  • the application of thermoplastic elastomers can improve the acoustic performance of speakers (reducing the resonance frequency, widening the product band, etc.).
  • silicone rubber materials can also be used.
  • the main chain of silicon rubber materials is composed of silicon and oxygen atoms. There are usually two organic groups connected to silicon atoms. Silicone rubber materials have the role of thermoplastic elastomers and can improve speakers. Acoustic performance (reducing resonance frequency, widening product band, etc.).
  • the diaphragm 100 is provided with a structural layer made of a thermoplastic elastomer material or a silicone rubber material.
  • the diaphragm 100 is a multilayer structure having a structure layer made of a thermoplastic elastomer material or a silicone rubber material.
  • the diaphragm 100 of this structure includes the technical effects of the previous embodiment. I will not repeat them here.
  • the invention also discloses a diaphragm assembly.
  • the diaphragm assembly includes:
  • Diaphragm 100 and,
  • the centering support 200 is connected to the diaphragm 100.
  • the diaphragm 100 please refer to the foregoing embodiment. Since the diaphragm module adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here.
  • the centering support piece 200 includes an inner fixing portion 210, an outer fixing portion 220, and a connecting arm 230.
  • the inner fixing portion 210 and the outer fixing portion 220 are disposed alternately.
  • the connecting arm 230 is provided between the inner fixing portion 210 and the outer fixing portion 220.
  • the connecting arm 230 includes a main body portion 233 and a first bending connection portion 231 provided at one end of the main body portion 233, and a second bending connection portion 232 provided at the other end of the main body portion 233.
  • the first bending connection portion 231 and the inner portion The fixing portion 210 is connected, and the second bending connection portion 232 is connected to the external fixing portion 220;
  • An edge of the center portion 110 of the diaphragm is connected to the inner fixing portion 210, and a fixing portion 130 of the diaphragm is connected to the outer fixing portion 220.
  • a centering piece 200 in order to ensure that the voice coil 300 does not deflect and prevent polarization of the diaphragm 100 in the vibration system, a centering piece 200 needs to be provided, and the outer fixing part 220 of the centering piece 200 is fixed on the housing.
  • the inner fixing portion 210 is fixed to the edge of the central portion 110 of the diaphragm 100, and the outer fixing portion 220 and the inner fixing portion 210 are connected as a whole through a plurality of connecting arms 230.
  • the inner fixing portion 210 is used to adhere to the edge of the center portion 110 of the diaphragm
  • the outer fixing portion 220 is fixed to the housing after being combined with the fixing portion 130 of the diaphragm
  • the voice coil 300 is fixed to the diaphragm 100 or
  • the centering support piece 200 corresponds to the edge of the central portion 110 or the inner fixing portion 210.
  • the inner fixing portion 210 and / or the outer fixing portion 220 have a ring shape.
  • the ring is rectangular with rounded corners.
  • four connecting arms 230 are provided, and are evenly distributed between the inner fixing portion 210 and the outer fixing portion 220.
  • the invention also discloses a loudspeaker.
  • the loudspeaker includes the above-mentioned diaphragm assembly and a voice coil combined with the diaphragm assembly.
  • the above embodiment for the specific structure of the diaphragm assembly, reference is made to the above embodiment, which has all the technical solutions of the above embodiment, and will not be described repeatedly.

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
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  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

本发明公开一种振膜、振膜组件以及扬声器。其中，定心支片包括内固定部、外固定部以及连接臂，内固定部和外固定部相间设置，连接臂设于内固定部和外固定部之间，连接臂包括主体部和设于主体部一端的第一折弯连接部，以及设于主体部另一端的第二折弯连接部，第一折弯连接部与内固定部连接，第二折弯连接部与外固定部连接；振膜包括中心部、围绕中心部设置的弯曲状的折环部以及围绕折环部设置的固定部；折环部与第一折弯连接部相对应的部位的最高点朝向内固定部偏移，折环部与第二折弯连接部相对应的部位的最高点朝向外固定部偏移。本发明方案通过折环部的避让设计，使得振膜的折环部具有充足的振动空间，从而满足扬声器的声学性能。

Description

振膜、振膜组件以及扬声器 技术领域
本发明涉及扬声器技术领域，特别涉及一种振膜、振膜组件以及扬声器。
背景技术
扬声器是便携式电子设备中一种重要的声学部件，用于将声波电信号转换成声音信号输出，是一种能量转换器件。
扬声器通常包括振动系统、磁路系统和辅助系统，振动系统和磁路系统收容于辅助系统中。振动系统一般包括结合在一起的振膜、定心支片和音圈，其中振膜与定心支片共同构成振膜组件，定心支片用于将振膜与音圈连接为一体，保证音圈垂直而不发生歪斜，有效地防止振膜偏振，同时定心支片还可影响振动系统的刚性及顺性，从而影响扬声器的频率响应，是扬声器的重要部件。
正如上所示，定心支片需要与振膜结合在一起，因此，在振动系统振动时，定心支片和振膜的折环部均会发生变形，造成折环部的振动空间偏小，影响声学性能。
发明内容
本发明的主要目的是提供一种振膜，该振膜应用于扬声器时，解决了现有技术中扬声器中振膜振动空间小的问题。
为实现上述目的，本发明公开了一种振膜，用于与定心支片结合，所述定心支片包括内固定部、外固定部以及连接臂，所述内固定部和外固定部相间设置，所述连接臂设于所述内固定部和所述外固定部之间，所述连接臂包括主体部和设于所述主体部一端的第一折弯连接部，以及设于所述主体部另一端的第二折弯连接部，所述第一折弯连接部与所述内固定部连接，所述第二折弯连接部与所述外固定部连接；
所述振膜包括中心部、围绕所述中心部设置的弯曲状的折环部以及围绕 所述折环部设置的固定部；所述折环部与所述第一折弯连接部相对应的部位的最高点朝向所述内固定部偏移，所述折环部与所述第二折弯连接部相对应的部位的最高点朝向所述外固定部偏移。
在本发明一实施例中，所述折环部与所述第一折弯连接部相对应的部位的截面呈非对称的弯曲状，所述折环部与所述第二折弯连接部相对应的部位的截面呈非对称的弯曲状。
在本发明一实施例中，所述主体部位于内固定部的一个边部和所述外固定部的一个边部之间，且所述主体部平行于所述内固定部的边部和所述外固定部的边部。
在本发明一实施例中，所述主体部至所述内固定部的边部的距离等于所述主体部至所述外固定部的边部的距离。
在本发明一实施例中，所述折环部与所述第一折弯连接部相对应的部位的最高点位于所述主体部的中心线的内侧，所述折环部与所述第二折弯连接部相对应的部位的最高点位于所述主体部的中心线的外侧。
在本发明一实施例中，所述折环部与所述主体部相对应的部位的最高点的连线和所述折环部与所述第一折弯连接部相对应的部位的最高点的连线平滑过渡；
所述折环部与所述主体部相对应的部位的最高点的连线和所述折环部与所述第二折弯连接部相对应的部位的最高点的连线平滑过渡。
在本发明一实施例中，所述折环部与所述主体部相对应的部位的最高点的连线由第一折弯连接部向第二折弯连接部的方向倾斜设置，与所述主体部的中心线具有夹角。
在本发明一实施例中，所述振膜由热塑性弹性体材料或者硅橡胶材料制备而成；
或者，所述振膜设有由热塑性弹性体材料或者硅橡胶材料制备而成的结构层。
本发明还公开了一种振膜组件，在本发明一实施例中，所述振膜组件包括：
如上任一实施例所述的振膜；以及，
定心支片，所述振膜连接于所述定心支片；
其中，所述定心支片包括内固定部、外固定部以及连接臂，所述内固定部和外固定部相间设置，所述连接臂设于所述内固定部和所述外固定部之间，所述连接臂包括主体部和设于所述主体部一端的第一折弯连接部，以及设于所述主体部另一端的第二折弯连接部，所述第一折弯连接部与所述内固定部连接，所述第二折弯连接部与所述外固定部连接；
所述振膜的中心部与所述内固定部连接，所述振膜的固定部与所述外固定部连接。
在一实施例中，所述内固定部和/或所述外固定部呈环状。
本发明还公开了一种扬声器，所述扬声器包括以上任一实施例的振膜组件以及与所述振膜组件结合在一起的音圈。
本发明技术方案通过将振膜的折环部与第一折弯连接部和第二折弯连接部相对应的部位的最高点偏移设置，使得在振膜在振动时，振膜的折环部与第一折弯连接部和第二折弯连接部相对应的部位具有充足的振动空间，从而满足扬声器的声学性能。此外，又由于通过将折环部相应的最高点偏移设置，使得在不增大振膜体积的前提下，增加振膜的折环部的振动空间，以满足微型扬声器的需求。
附图说明
为了更清楚地说明本发明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示出的结构获得其他的附图。
图1为本发明一实施例中振动系统结构示意图；
图2为本发明一实施例中振膜主视图；
图3为本发明一实施例中定心支片主视图；
图4为本发明一实施例中振膜和定心支片结合透视图(虚线所示为折环部最高点的连线)；
图5为图4中A-A剖视图；
图6为图4中C-C剖视图。
附图标号说明：
标号 名称 标号 名称
100 振膜 220 外固定部
110 中心部 230 连接臂
120 折环部 231 第一折弯连接部
130 固定部 232 第二折弯连接部
200 定心支片 233 主体部
210 内固定部 300 音圈
本发明目的的实现、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，都属于本发明保护的范围。
需要说明，本发明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。
在本发明中，除非另有明确的规定和限定，术语“连接”、“固定”等应做广义理解，例如，“固定”可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
另外，在本发明中如涉及“第一”、“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“第一”、“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，也不在本发明要求的保护范围之内。
本发明提出一种振膜。
如图1至图5所示，在一实施例中，振膜100用于与定心支片200结合，定心支片200包括内固定部210、外固定部220以及连接臂230，内固定部210和外固定部220相间设置，连接臂230设于内固定部210和外固定部220之间，连接臂230包括主体部233和设于主体部233一端的第一折弯连接部231，以及设于主体部233另一端的第二折弯连接部232，第一折弯连接部231与内固定部210连接，第二折弯连接部232的与外固定部220连接；
振膜100包括中心部110、围绕中心部110设置的弯曲状的折环部120以及围绕折环部120设置的固定部130；折环部120与第一折弯连接部231相对应的部位的最高点朝向内固定部210偏移，折环部120与第二折弯连接部232相对应的部位的最高点朝向外固定部220偏移。
在一些扬声器中，特别是微型扬声器中，为了保证音圈300不发生歪斜，防止振膜100发生偏振，需要设置一个定心支片200，定心支片200的外固定部220与固定部130连接并固定在外壳上，内固定部210与振膜100的中心部110边缘固定，外固定部220和内固定部210之间通过多条连接臂230连接为一体。在组装扬声器时，需要将振膜100和定心支片200用胶水粘接为一体，再粘接音圈300形成振动系统，然后将振动系统用胶水粘接在外壳上。由此可见，在本实施例中，振膜100用于与定心支片200的结合，也即振膜100和定心支片200的结合对于本领域技术人员来说是常规技术手段。
定心支片200包括内固定部210、外固定部220以及连接臂230，三者之间可以通过胶水粘接固定，或通过一体成型制备。定心支片200可以采用绝缘基材制成，该绝缘基材可以为聚酰亚胺，或者选用除聚酰亚胺之外的其他高分子材料。
一般来说，需要在定心支片200上设置导电层，该导电层用于与音圈300和扬声器的外部电路电连接。该导电层可选用铜箔，还可以是其他的金属层或者石墨烯导电层。该导电层结合于定心支片200上可以先将铜箔按照定心支片200的结构进行裁剪，然后再利用胶黏剂进行结合，或者该导电层通过电镀、印刷或编织的方式结合于定心支片200上。
在本发明实施例中，如上，振动系统是由振膜100、定心支片200和音圈300结合在一起。音圈300用于伸入磁路系统中的磁间隙中，音圈300连通变化的电流受到不同大小的安培力而振动，从而带动定心支片200和振膜100的振动，也即定心支片200和振膜100能同时发生振动。该定心支片200包括内固定部210、外固定部220和连接内固定部210与外固定部220的连接臂230，又由于定心支片200的外固定部220用于与外壳进行连接固定，内固定部210用于与音圈300和振膜100的中心部110边缘固定连接，因此，在定心支片200振动发生时，内固定部210带动连接臂230振动，从而第一折弯连接部231和第二折弯连接部232与振膜的折环部120之间的空间随着振动的发生而变化。
具体地，当音圈300向上振动时，振膜100和定心支片200向上振动，内固定部210带动连接臂230向上振动，此时由于第一折弯连接部231对应着折环部120靠近边缘的部位，因此振膜100的折环部120相对于第一折弯连接部231的部位的振动空间偏小。当振膜100的折环部120相对于第一折弯连接部231的部位的振动空间偏小时，发声效果势必受到影响。
当音圈300向下振动时，振膜100和定心支片200向下振动，内固定部210带动连接臂230向下振动，即第一折弯连接部231向下振动，由于此时外固定部220是固定不动的，内固定部210带动连接臂230向下振动时，第二折弯连接部232向下的振动幅度较小，且由于第二折弯连接部232与折环部120靠近边缘的部位相对，因此当振膜100向下振动时，振膜100的折环部120相对于第二折弯连接部232的部位的振动空间偏小，发声效果受到影响。
因此，本实施例中，通过将折环部120与第一折弯连接部231和第二折弯连接部232相对应的部位的最高点偏移设置。也即，在内固定部210带动连接臂230振动时，第一折弯连接部231和第二折弯连接部232存在一个上下振幅最大的部位(点)，通过折环部120的相对应部位的最高点偏移设置，从而能增大折环部120分别与第一折弯连接部231和第二折弯连接部232相对应部位的振动空间，从而解决折环部120振动空间偏小的问题。如图4所示，折环部120的最高点的连线如虚线所示，也就是说，通过将振膜的折环部120相对应第一折弯连接部231和第二折弯连接部232形成一个避让的结构，从而使得定心支片200和振膜100在振动时，能有效保证振膜的振动空间。
此外，通过增大折环部120的整体高度也能增大连接臂230和折环部120两 者之间的振动空间，但是增大了折环部120的整体高度使得整个扬声器的体积也增大，不便于扬声器的小型化。本实施例中通过折环部120与第一折弯连接部231和第二折弯连接部232相对应的部位的最高点偏移设置，也即振膜110的折环部120对连接臂230的第一折弯连接部231和第二折弯连接部232形成避让，在保证体积不变大的情况下，增大了振动空间，保证了扬声器的声学性能。
折环部120呈弯曲状，为中心部110的振动提供一定的顺性，也就是提供一定的柔性，使得中心部110更容易发生振动。此外，通过将折环部120设置呈弯曲状，能避免振膜100在振动过程中发生应力突变而破裂，提高了振膜100的使用寿命。在保证上述技术效果的前提下，折环部120的弯曲状可以为半圆形，也可以为呈一定弧度的弧形，根据实际情况进行设置即可，本发明实施例中不作限定。
进一步地，折环部120与第一折弯连接部231和第二折弯连接部232相对应的部位的最高点偏移设置可以为，折环部120相对应的部位的截面呈对称弯曲状，该折环部120的相对应的部位整体偏移设置，以此可以增大振动空间。但是，这种形式的设置会造成定心支片200的结构发生改变，也即，当折环部120对应连第一折弯连接部231和第二折弯连接部232的部位整体偏移后，定心支片200上的内固定部210和外固定部220也要相应的偏移一定距离以与振膜100结合，这容易造成偏振的问题。定心支片200发生局部的偏移后，对其结构强度同样不利，甚至可能发生振动断裂的问题。因此，如图4至图6所示，折环部120与第一折弯连接部231相对应的部位的截面呈非对称的弯曲状，折环部120与第二折弯连接部232相对应的部位的截面呈非对称的弯曲状。通过将折环部120相对应的部位设置成非对称的弯曲状，此时，此时折环部120相对应的部位的最高点实现了偏移，但是并不需要将折环部120相对应的部位进行整体偏移。
可以理解的是，上述对折环部120相对应的部位进行偏移或者将折环部120的截面设置呈非对称的弯曲状均为在制备振膜100时成型制备。
在一实施例中，如图3所示，主体部233位于内固定部210的一个边部和外固定部220的一个边部之间，且主体部233平行于内固定部210的边部和外固定部220的边部。在本实施例中，将主体部233设置成平行于内固定部210的边部 和外固定部220的边部，使得主体部233在随音圈振动时，保证了其与折环部120之间的最大空间，确保折环部120与主体部233对应的部位具有最大的振动空间。
进一步地，主体部233至内固定部210的边部的距离等于主体部233至外固定部220的边部的距离。在本实施例中，通过如此设置，保证了其与折环部120之间的最大空间，确保折环部120与主体部233对应的部位具有最大的振动空间。
在一实施例中，如图4所示，折环部120与第一折弯连接部231相对应的部位的最高点位于主体部233的中心线的内侧，折环部120与第二折弯连接部232相对应的部位的最高点位于主体部233的中心线的外侧。在本实施例中，通过如此设置，可以使得折环部120与第一折弯连接部231和第二折弯连接部232对应部位的空间最大化，从而有效保证了折环部120的振动空间。
在一实施例中，如图4所示，折环部120与主体部233相对应的部位的最高点的连线和折环部120与第一折弯连接部231相对应的部位的最高点的连线平滑过渡；
折环部120与主体部233相对应的部位的最高点的连线和折环部120与第二折弯连接部232相对应的部位的最高点的连线平滑过渡。
在本实施例中，通过如上设置，使得折环部120与第一折弯连接部231、主体部233和第二折弯连接部232相对应的部位平滑过渡，防止振膜100在振动过程中出现应力突变而破裂，保证声学性能。
进一步地，折环部120与主体部233相对应的部位的最高点的连线由第一折弯连接部231向第二折弯连接部232的方向倾斜设置，与主体部233的中心线具有夹角。如此，使得折环部120与主体部233对应的部位呈中心对称的形状，确保折环部120与主体部233对应的部位平滑过渡至与第一折弯连接部231和第二折弯连接部232对应的部位，确保振膜100的不容易发生振动损坏。
在一实施例中，振膜100由热塑性弹性体材料或硅橡胶材料制备而成。
在本实施例中，热塑性弹性体的结构特点是由化学键组成不同的树脂段和橡胶段，树脂段凭借链间作用力形成物理交联点，橡胶段是高弹性链段，贡献弹性。热塑性弹性体材料包括但不限于热塑性聚酯弹性体(TPEE)、热塑性聚氨酯弹性体(TPU)、聚酰胺类热塑性弹性体(TPAE)。通过热塑性弹性 体的应用，能提高扬声器的声学性能(降低谐振频率、拓宽产品频带等)。
当然，也可以使用硅橡胶材料，硅橡胶材料的主链由硅和氧原子交替构成，硅原子上通常连有两个有机基团，硅橡胶材料具有与热塑性弹性体类型的作用，能提高扬声器的声学性能(降低谐振频率、拓宽产品频带等)。
在另一实施例中，振膜100设有由热塑性弹性体材料或者硅橡胶材料制备而成的结构层。在本实施例中，振膜100为多层的结构体，其中具有由热塑性弹性体材料或者硅橡胶材料制备而成的结构层，这种结构的振膜100包含上一实施例的技术效果，不再重复赘述。
本发明还公开了一种振膜组件，在一实施例中，振膜组件包括：
振膜100；以及，
定心支片200，振膜100连接于定心支片200。
振膜100请参照上述实施例，由于振膜组件采用了上述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。
其中，定心支片200包括内固定部210、外固定部220以及连接臂230，内固定部210和外固定部220相间设置，连接臂230设于内固定部210和外固定部220之间，连接臂230包括主体部233和设于主体部233一端的第一折弯连接部231，以及设于主体部233另一端的第二折弯连接部232，第一折弯连接部231与内固定部210连接，第二折弯连接部232的与外固定部220连接；
振膜的中心部110的边缘与内固定部210连接，振膜的固定部130与外固定部220连接。
在本实施例中，振动系统中，为了保证音圈300不发生歪斜，防止振膜100发生偏振，需要设置一个定心支片200，定心支片200的外固定部220固定在外壳上，内固定部210与振膜100的中心部110边缘固定，其外固定部220和内固定部210之间通过多条连接臂230连接为一体。在组装扬声器时，需要将振膜100和定心支片200用胶水粘接为一体，再粘接音圈300形成振动系统，然后将振动系统用胶水粘接在外壳上。
在本实施例中，内固定部210用于与振膜的中心部110边缘粘合，外固定部220与振膜的固定部130结合后固定于外壳上，音圈300固定于振膜100或定心支片200上，与中心部110的边缘或内固定部210相对应。在音圈300受安培 力发生振动时，带动振膜100和定心支片200的振动，从而输出声音。
进一步地，如图2所示，内固定部210和/或外固定部220呈环状。环状为圆角矩形状。具体地，连接臂230设置为四条，均匀分布于内固定部210和外固定部220之间。
本发明还公开了一种扬声器，在一实施例中，扬声器包括上述振膜组件以及与振膜组件结合在一起的音圈。在本实施例中，振膜组件的具体结构参照以上实施例，具有以上实施例的全部技术方案，不再重复赘述。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明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发明的专利保护范围内。

Claims (11)

  1. 一种振膜，用于与定心支片结合，所述定心支片包括内固定部、外固定部以及连接臂，所述内固定部和外固定部相间设置，所述连接臂设于所述内固定部和所述外固定部之间，所述连接臂包括主体部和设于所述主体部一端的第一折弯连接部，以及设于所述主体部另一端的第二折弯连接部，所述第一折弯连接部与所述内固定部连接，所述第二折弯连接部与所述外固定部连接；
    其特征在于，所述振膜包括中心部、围绕所述中心部设置的弯曲状的折环部以及围绕所述折环部设置的固定部；所述折环部与所述第一折弯连接部相对应的部位的最高点朝向所述内固定部偏移，所述折环部与所述第二折弯连接部相对应的部位的最高点朝向所述外固定部偏移。
  2. 如权利要求1所述的振膜，其特征在于，所述折环部与所述第一折弯连接部相对应的部位的截面呈非对称的弯曲状，所述折环部与所述第二折弯连接部相对应的部位的截面呈非对称的弯曲状。
  3. 如权利要求1所述的振膜，其特征在于，所述主体部位于内固定部的一个边部和所述外固定部的一个边部之间，且所述主体部平行于所述内固定部的边部和所述外固定部的边部。
  4. 如权利要求3所述的振膜，其特征在于，所述主体部至所述内固定部的边部的距离等于所述主体部至所述外固定部的边部的距离。
  5. 如权利要求3或4所述的振膜，其特征在于，所述折环部与所述第一折弯连接部相对应的部位的最高点位于所述主体部的中心线的内侧，所述折环部与所述第二折弯连接部相对应的部位的最高点位于所述主体部的中心线的外侧。
  6. 如权利要求1至4任一权利要求所述的振膜，其特征在于，所述折环 部与所述主体部相对应的部位的最高点的连线和所述折环部与所述第一折弯连接部相对应的部位的最高点的连线平滑过渡；
    所述折环部与所述主体部相对应的部位的最高点的连线和所述折环部与所述第二折弯连接部相对应的部位的最高点的连线平滑过渡。
  7. 如权利要求6所述的振膜，其特征在于，所述折环部与所述主体部相对应的部位的最高点的连线由第一折弯连接部向第二折弯连接部的方向倾斜设置，与所述主体部的中心线具有夹角。
  8. 如权利要求1所述的振膜，其特征在于，所述振膜由热塑性弹性体材料或者硅橡胶材料制备而成；
    或者，所述振膜设有由热塑性弹性体材料或者硅橡胶材料制备而成的结构层。
  9. 一种振膜组件，其特征在于，所述振膜组件包括：
    权利要求1至8中任一项所述的振膜；以及，
    定心支片，所述振膜连接于所述定心支片；
    其中，所述定心支片包括内固定部、外固定部以及连接臂，所述内固定部和外固定部相间设置，所述连接臂设于所述内固定部和所述外固定部之间，所述连接臂包括主体部和设于所述主体部一端的第一折弯连接部，以及设于所述主体部另一端的第二折弯连接部，所述第一折弯连接部与所述内固定部连接，所述第二折弯连接部与所述外固定部连接；
    所述振膜的中心部与所述内固定部连接，所述振膜的固定部与所述外固定部连接。
  10. 如权利要求9所述的振膜组件，其特征在于，所述内固定部和/或所述外固定部呈环状。
  11. 一种扬声器，其特征在于，所述扬声器包括权利要求9或10所述的振膜组件以及与所述振膜组件结合在一起的音圈。
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