WO2022006955A1 - 下振膜、模具及扬声器 - Google Patents

下振膜、模具及扬声器 Download PDF

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Publication number
WO2022006955A1
WO2022006955A1 PCT/CN2020/102393 CN2020102393W WO2022006955A1 WO 2022006955 A1 WO2022006955 A1 WO 2022006955A1 CN 2020102393 W CN2020102393 W CN 2020102393W WO 2022006955 A1 WO2022006955 A1 WO 2022006955A1
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WO
WIPO (PCT)
Prior art keywords
circuit board
voice coil
ring segment
magnetic
flexible circuit
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/CN2020/102393
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English (en)
French (fr)
Inventor
曾健
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 Technologies Pte Ltd
Original Assignee
AAC Acoustic Technologies Shenzhen Co Ltd
AAC Technologies Pte Ltd
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Filing date
Publication date
Application filed by AAC Acoustic Technologies Shenzhen Co Ltd, AAC Technologies Pte Ltd filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2022006955A1 publication Critical patent/WO2022006955A1/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
    • 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

Definitions

  • the present application relates to the field of electro-acoustic conversion, and in particular, to a lower diaphragm, a mold and a loudspeaker.
  • the conventional SLS lower diaphragm and FPC are left-right symmetrical structures. Since the inlet and outlet wires of the voice coil are welded to the pads of the FPC on one side, the FPC on the side becomes soft due to the heat generated by the AC current when the speaker ( Figure 1) is working, and the stiffness becomes smaller. The stiffness of the FPC on the other side is basically unchanged, and the asymmetry of the stiffness during work will cause rocking.
  • Swing will cause problems such as high frequency and pure tone, which will affect the normal use of the product.
  • the purpose of the present application is to provide a lower diaphragm, a mold and a loudspeaker, so as to solve the problem of rocking caused by the asymmetric stiffness of the FPC of the current loudspeaker.
  • a lower diaphragm, the lower diaphragm is arranged on a speaker
  • the speaker includes a vibration system and a magnetic circuit system that drives the vibration system to vibrate and sound
  • the magnetic circuit system has a magnetic gap
  • the vibration system includes a sound diaphragm , the voice coil supported on the side of the sound film close to the magnetic circuit system, the circuit board fixed on the voice coil, and the lower diaphragm fixed on the side of the voice coil away from the sound film, so The side of the voice coil away from the sound membrane is inserted into the magnetic gap
  • the circuit board includes a first flexible circuit board and a second flexible circuit symmetrically arranged on opposite sides of the voice coil along a first direction board, the lead wire of the voice coil is welded with the first flexible circuit board
  • the lower diaphragm includes a first fixing part fixed relative to the voice coil, fixed relative to the magnetic circuit system and connected to the A second fixing part arranged at intervals from the first fixing part and a fold ring connected between the first fixing part
  • the first ring segment includes a first connection surface connected to the first fixing portion, a second connection surface connected to the second fixing portion, and a second connection surface connected to the second fixing portion. a third connecting surface between the first connecting surface and the second connecting surface;
  • the second loop segment includes a fourth connection surface connected with the first fixing part, a fifth connection surface connected with the second fixing part, and a fourth connection surface connected with the fifth connection the sixth connecting surface between the surfaces;
  • the curvature of the first connection surface is smaller than the curvature of the fourth connection surface
  • the curvature of the second connection surface is smaller than the curvature of the fifth connection surface
  • the curvature of the third connection surface is smaller than that of the first connection surface.
  • the first ring segment is spaced apart from the second ring segment.
  • the orthographic projections of the first ring segment and the second ring segment on a plane perpendicular to the vibration direction are both U-shaped and the U-shaped openings are opposite;
  • a first folded area is formed at the corner of the first folded ring segment, and a second folded area is formed at the corner of the second folded ring segment.
  • a mold is used for making the above-mentioned lower diaphragm.
  • the mold includes a forming surface formed with a first groove that mates with the first folded ring segment and a groove that mates with the second folded ring segment second groove.
  • the molding surface is further formed with a third groove, and the third groove is annular and is annularly arranged on the outside of the first groove and the second groove .
  • the molding surface has through holes that penetrate the mold.
  • a loudspeaker includes a vibration system, a magnetic circuit system that drives the vibration system to vibrate and sound, and a basin frame that fixes the vibration system and the magnetic circuit system, the magnetic circuit system has a magnetic gap, and the vibration system includes a sound a membrane, a voice coil supported on the side of the voice membrane close to the magnetic circuit system, a circuit board fixed on the voice coil, and the lower diaphragm fixed on the side of the voice coil away from the voice membrane, The side of the voice coil away from the sound membrane is inserted into the magnetic gap; the circuit board includes a first flexible circuit board and a second flexible circuit board symmetrically arranged on opposite sides of the voice coil along a first direction A circuit board, the voice coil is electrically connected to the first flexible circuit board, the first flexible circuit board and the sound membrane are arranged opposite to each other along the vibration direction of the sound membrane and are respectively connected to the basin frame, so The second flexible circuit board and the sound film are disposed opposite to each other along the vibration direction and are respectively connected to the basin frame, and the speaker further
  • the magnetic circuit system includes a magnetic bowl, a main magnetic steel fixed to the magnetic bowl, and a secondary magnetic steel arranged around the main magnetic steel, and the magnetic gap is formed in the between the main magnet and the secondary magnet;
  • the magnetic circuit system further includes a main pole core and a splint, the main pole core is located between the main magnetic steel and the sound film and is stacked on the main magnetic steel, and the splint includes a connection with the basin frame.
  • the loudspeaker further includes a support frame, the support frame is spanned between the voice coil and the sound membrane, and a side of the support frame away from the sound membrane is along the The outer periphery of the voice coil extends to form a connecting portion connected to the first flexible circuit board and the second flexible circuit board.
  • the above-mentioned lower diaphragm adopts the first folded ring segment and the second folded ring segment with different stiffnesses, and the first folded ring segment with greater rigidity faces the first flexible circuit board welded with the lead wire of the voice coil, and the first folded ring
  • the first fixing part and the second fixing part of the ring segment connect the voice coil part on one side of the first flexible circuit board and the magnetic circuit system part, which can make up for the rigidity of the first flexible circuit board which becomes soft due to the heat generated by the alternating current decrease, thereby suppressing the sway.
  • Fig. 1 is the front view on the existing loudspeaker
  • Fig. 2 is the structural representation of the lower diaphragm of the application
  • Fig. 3 is A-A sectional view in Fig. 2;
  • Fig. 4 is the sectional view along B-B in Fig. 2;
  • Fig. 5 is the structural representation of the mold of the application.
  • Fig. 6 is C-C in Fig. 5 in the sectional view
  • FIG. 7 is a schematic structural diagram of a loudspeaker of the application.
  • Fig. 8 is the sectional view along D-D in Fig. 7;
  • FIG. 9 is an exploded view of the loudspeaker shown in FIG. 7;
  • FIG. 10 is a simulation curve of stiffness of the lower diaphragm of the present application.
  • a lower diaphragm 600, the lower diaphragm 600 is disposed on the speaker 10, the speaker 10 includes a vibration system 100 and a magnetic circuit system 200 for driving the vibration system 100 to vibrate and sound, the magnetic circuit system 200 has a magnetic gap 210, and the vibration system 100 includes a sound
  • the circuit board includes a first flexible circuit board 400 and a second flexible circuit board 500 symmetrically disposed on opposite sides of the voice coil 120 along the first direction.
  • the lead wires of the voice coil 120 are welded to the first flexible circuit board 400 .
  • the first flexible circuit board 400 becomes soft due to the heat generated by the alternating current, and the rigidity becomes smaller.
  • the stiffness of the second flexible circuit board 500 is basically unchanged, and the asymmetry of the stiffness during operation may cause swaying. Swing will cause problems such as high order and pure tone, which will affect the normal use of the speaker 10 .
  • the lower diaphragm 600 includes a first fixing portion 630 that is relatively fixed to the voice coil 120 , a second fixing portion 640 that is relatively fixed to the magnetic circuit system 200 and is spaced apart from the first fixing portion 630 , and is connected to the first fixing portion. 630 and the ring between the second fixing part 640 .
  • the folding ring includes a first folding ring segment 610 facing the first flexible circuit board 400 and a second folding ring segment 620 facing the second flexible circuit board 500 . The stiffness of the first flap segment 610 is greater than the stiffness of the second flap segment 620 .
  • the first fixing portion 630 and the second fixing portion 640 of the first folding ring segment 610 are connected to the voice coil 120 and the magnetic circuit system 200 through the first flexible circuit board 400 .
  • the fixing part 630 and the second fixing part 640 are connected to the voice coil 120 and the magnetic circuit system 200 through the second flexible circuit board 500 .
  • the first direction is perpendicular to the vibration direction of the sound membrane 110 .
  • the first direction is parallel to the direction indicated by arrow X in FIG. 2
  • the vibration direction is parallel to the direction indicated by arrow Y in FIG. 2 .
  • the first folding ring segment 610 protrudes away from the first flexible circuit board 400
  • the second folding ring segment 620 protrudes away from the second flexible circuit board 500 .
  • the above-mentioned lower diaphragm 600 adopts the first folded ring segment 610 and the second folded ring segment 620 with different stiffnesses, and the first folded ring segment 610 with higher stiffness faces the first flexible circuit welded to the lead wire of the voice coil 120
  • the board 400, the first fixing part 630 and the second fixing part 640 of the first folding ring segment 610 connect the part of the voice coil 120 on the side of the first flexible circuit board 400 with the part of the magnetic circuit system 200, which can compensate for the damage caused by the alternating current.
  • the rigidity of the first flexible circuit board 400 which is heated and softened, is reduced, thereby suppressing swaying.
  • the first folding ring segment 610 includes a first connection surface 611 connected to the first fixing portion 630 , a second connection surface 612 connected to the second fixing portion 640 , and a first connection surface 612 connected to the first connection surface 612 .
  • the second loop segment 620 includes a fourth connection surface 621 connected to the first fixing portion 630 , a fifth connection surface 622 connected to the second fixing portion 640 , and a connection between the fourth connection surface 621 and the fifth connection surface 622 The sixth connection surface 623.
  • the positions of the first connection surface 611 and the fourth connection surface 621 are symmetrical, the positions of the second connection surface 612 and the fifth connection surface 622 are symmetrical, and the positions of the third connection surface 613 and the sixth connection surface 623 are symmetrical.
  • the curvature of the first connection surface 611 is smaller than that of the fourth connection surface 621
  • the curvature of the second connection surface 612 is smaller than that of the fifth connection surface 622
  • the curvature of the third connection surface 613 is smaller than that of the sixth connection surface 623 .
  • the stiffness of the first and second loop segments 610 and 620 can be adjusted by changing the curvature of each connecting surface.
  • the stiffness of the first folded ring segment 610 is greater than that of the second folded ring segment 620 .
  • the first connection surface 611 , the second connection surface 612 and the third connection surface 613 are all straight surfaces
  • the fourth connection surface 621 , the fifth connection surface 622 and the sixth connection surface 623 are all arcs shape, so that the first folded ring segment 610 has greater stiffness relative to the second folded ring segment 620 .
  • first folding ring segment 610 and the second folding ring segment 620 are arranged at intervals.
  • the orthographic projections of the first folding ring segment 610 and the second folding ring segment 620 on a plane perpendicular to the vibration direction are both U-shaped and the U-shaped openings are opposite to each other. It can be understood that in other embodiments, the orthographic projection may also have other shapes, for example, a semi-circular arc shape, a straight line shape, or a wave shape.
  • a first folded area 614 is formed at the corner of the first folded ring segment 610
  • a second folded area 624 is formed at the corner of the second folded ring segment 620 .
  • the bulging direction of the wrinkles on the first wrinkle area 614 and the second wrinkle area 624 is opposite to the bulging direction of the first folding ring segment 610/the second folding ring segment 620, that is, the wrinkles are in the first folding ring segment
  • a groove is formed on the 610/second folded ring segment 620, and it can be understood that in other embodiments, the direction of the wrinkle protrusion is the same as that of the first folded ring segment 610/the second folded ring segment 620; or in other In implementation, the direction of part of the pleats is the same as the direction of the first folding ring segment 610/the second folding ring segment 620, and the direction of the other part of the pleats is the same as that of the first folding ring segment 610/the second folding ring segment 620.
  • the bulges are in the opposite direction.
  • the embodiment of the present application further discloses a mold 20 , and the mold 20 is used to manufacture the lower diaphragm 600 .
  • the mold 20 includes a molding surface 21 , and the molding surface 21 is formed with a first groove 211 matching the first folded ring segment 610 and a second groove 212 matching with the second folded ring segment 620 .
  • Two different shapes of folded ring segments are provided above, which can not change the original assembly process and save a lot of manpower and material resources.
  • the lower diaphragm 600 can be formed by air pressure blowing.
  • the processing material for making the lower diaphragm 600 is evenly laid on the molding surface 21, and the processing material is subjected to air explosion molding through the air explosion structure.
  • the lower diaphragm 600 is formed.
  • the forming surface 21 is further formed with a third groove 213 , and the third groove 213 is annular and is annularly arranged on the outside of the first groove 211 and the second groove 212 .
  • the third groove 213 can accommodate more processing materials, and the semi-finished product of the lower diaphragm 600 obtained by air explosion molding forms a reinforcing rib at the position corresponding to the third groove 213, which helps to increase the semi-finished product of the lower diaphragm 600 when the film is opened. strength to prevent damage to the semi-finished product of the lower diaphragm 600.
  • the forming surface 21 has through holes 214 , and the through holes 214 penetrate through the mold 20 .
  • the through hole 214 facilitates the introduction of gas, so as to separate the semi-finished product of the diaphragm from the molding surface 21 .
  • some of the through holes 214 are located in the third groove 213 .
  • the embodiment of the present application also discloses a speaker 10, including a vibration system 100, a magnetic circuit system 200 for driving the vibration system 100 to vibrate and sound, and a device for fixing the vibration system 100 and the magnetic circuit system 200.
  • the basin frame 300, the magnetic circuit system 200 has a magnetic gap 210, and the vibration system 100 includes a sound film 110, a voice coil 120 supported on the side of the sound film 110 close to the magnetic circuit system 200, a circuit board fixed to the voice coil 120, and a circuit board fixed to the sound film 110.
  • the lower diaphragm 600 on the side of the coil 120 away from the sound diaphragm 110 .
  • the voice coil 120 is formed by winding a wire, and an incoming and outgoing wire for the conduction of the voice coil 120 is provided on the voice coil 120 .
  • the side of the voice coil 120 away from the sound membrane 110 is inserted into the magnetic gap 210 .
  • an electromagnetic force is generated with the magnetic circuit system 200 to drive the sound membrane 110 to vibrate.
  • the voice coil 120 is rectangular.
  • the circuit board includes a first flexible circuit board 400 and a second flexible circuit board 500 symmetrically disposed on opposite sides of the voice coil 120 along the first direction, and the voice coil 120 is electrically connected to the first flexible circuit board 400 .
  • the first flexible circuit board 400 and the sound film 110 are disposed opposite to each other along the vibration direction and are respectively connected to the basin frame 300 .
  • the sound membrane 110 includes a dome 111 and an upper fold ring 112 arranged around the dome 111 .
  • the outer edge of the upper fold ring 112 is provided with a third fixing portion 1121 for fixing the upper fold ring 112 .
  • the inner edge is provided with a connecting portion 1122 connected with the dome 111 .
  • the upper folding ring 112 is connected to the basin frame 300 through the third fixing portion 1121 .
  • first folding ring segment 610 is arranged on the first flexible circuit board 400 through the first fixing portion 630 and the second fixing portion 640
  • second folding ring segment 620 is arranged on the first fixing portion 630 and the second fixing portion 640 on the first flexible circuit board 400 .
  • the second flexible circuit board 500 The first folding ring segment 610 and the second folding ring segment 620 are respectively disposed opposite to the sound membrane 110 .
  • the first folded ring segment 610 is located on the side of the first flexible circuit board 400 away from the sound membrane 110
  • the second folded ring segment 620 is located on the side of the second flexible circuit board 500 away from the sound membrane 110 .
  • the magnetic circuit system 200 includes a magnetic bowl 220 , a main magnetic steel 230 fixed to the magnetic bowl 220 and a secondary magnetic steel 240 arranged around the main magnetic steel 230 , and a magnetic gap 210 is formed between the main magnetic steel 230 and the secondary magnetic steel 240 between.
  • the number of the secondary magnetic steels 240 is two and is located on both sides of the main magnetic steel 230 , that is, the magnetic circuit system 200 is a three-magnetic steel magnetic circuit.
  • the magnetic circuit system 200 further includes a main pole core 250 and a clamping plate 260 .
  • the main pole core 250 is located between the main magnetic steel 230 and the sound film 110 and is stacked on the main magnetic steel 230 .
  • the splint 260 includes a fixing member 261 connected to the basin frame 300 and a secondary pole core 262 located on the fixing member 261.
  • the fixing member 261 is annular, and the secondary pole core 262 is located between the secondary magnetic steel 240 and the sound film 110 and is stacked on the Secondary magnet 240.
  • the main magnetic steel 230 and the main pole core 250 are located in the center of the magnetic bowl 220 .
  • Magnetic conductive sheets 270 are provided between the main magnetic steel 230 and the auxiliary magnetic steel 240 and the magnetic bowl 220 , between the main magnetic steel 230 and the main pole core 250 , and between the auxiliary magnetic steel 240 and the auxiliary pole core 262 .
  • the above arrangement further improves the performance of the magnetic circuit system 200, so that as many magnetic lines of force of the magnetic circuit system 200 are cut as possible by the voice coil 120 to form a larger driving force.
  • the speaker 10 further includes a support frame 700 , and the support frame 700 is erected between the voice coil 120 and the sound film 110 .
  • a side of the support frame 700 away from the sound membrane 110 extends along the outer circumference of the voice coil 120 to form a connecting portion 701 that is connected to the first flexible circuit board 400 and the second flexible circuit board 500 .
  • the support frame 700 is fixed under the dome 111 , and the support frame 700 is connected with the voice coil 120 to suspend the voice coil 120 below the sound membrane 110 .
  • the support skeleton 700 indirectly connects the voice coil 120 with the first flexible circuit board 400 and the second flexible circuit board 500 .
  • the first flexible circuit board 400 and the second flexible circuit board 500 can effectively suppress the lateral swing of the voice coil 120 , thereby improving the reliability and stability of the speaker 10 .
  • the first folded ring segment 610 and the second folded ring segment 620 with different stiffnesses, the first folded ring segment 610 with higher stiffness is arranged on the first flexible part welded with the lead wire of the voice coil 120 .
  • the circuit board 400 can make up for the decrease in stiffness of the first flexible circuit board 400 which becomes soft due to heat generated by the alternating current, thereby suppressing swinging.

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

Abstract

本申请提供了一种下振膜、模具及扬声器。该下振膜采用刚度不同的第一折环段和第二折环段，将刚度较大的第一折环段正对与音圈的引出线焊接的第一柔性电路板，第一折环段的第一固定部和第二固定部将位于第一柔性电路板一侧的音圈部分和磁路系统部分连接，可以弥补因为交流电流引起发热而变软的第一柔性电路板的刚度减小，从而抑制摇摆。

Description

下振膜、模具及扬声器 技术领域
本申请涉及电声转换领域，尤其涉及一种下振膜、模具及扬声器。
 背景技术
常规SLS下振膜和FPC（柔性电路板）为左右对称结构。由于音圈的进出线与一侧FPC的焊盘焊接，扬声器（图1）工作时该侧FPC由于交流电流引起发热而变软，刚度变小。另一侧FPC刚度则基本不变，这种工作时的刚度不对称会引起摇摆。
 技术问题
摇摆会引发高次、纯音等问题，从而影响产品正常使用。
因此，有必要提供一种下振膜、模具及扬声器。
 技术解决方案
本申请的目的在于提供一种下振膜、模具及扬声器，以解决目前扬声器的FPC刚度不对称而引起的摇摆问题。
为了解决上述技术问题，本申请采用的技术方案一为：
一种下振膜，所述下振膜设置于扬声器，所述扬声器包括振动系统和驱动所述振动系统振动发声的磁路系统，所述磁路系统具有磁间隙，所述振动系统包括音膜、支撑在所述音膜靠近所述磁路系统一侧的音圈、固定于所述音圈的电路板以及固定于所述音圈远离所述音膜一侧的所述下振膜，所述音圈远离所述音膜的一侧插置于所述磁间隙内；所述电路板包括沿第一方向对称设置在所述音圈相对两侧的第一柔性电路板和第二柔性电路板，所述音圈的引出线与所述第一柔性电路板焊接，所述下振膜包括与所述音圈相对固定的第一固定部、与所述磁路系统相对固定并与所述第一固定部间隔设置的第二固定部以及连接在所述第一固定部与所述第二固定部之间的折环，所述折环包括与所述第一柔性电路板正对的第一折环段、以及与所述第二柔性电路板正对的第二折环段，所述第一折环段的刚度大于所述第二折环段的刚度，所述第一方向垂直于所述音膜的振动方向。
在所述下振膜的一些实施例中，所述第一折环段包括与所述第一固定部连接的第一连接面、与所述第二固定部连接的第二连接面以及连接在所述第一连接面和所述第二连接面之间的第三连接面；
所述第二折环段包括与所述第一固定部连接的第四连接面、与所述第二固定部连接的第五连接面以及连接在所述第四连接面和所述第五连接面之间的第六连接面；
其中，所述第一连接面的曲率小于所述第四连接面的曲率，所述第二连接面的曲率小于所述第五连接面的曲率，所述第三连接面的曲率小于所述第六连接面的曲率。
在所述下振膜的一些实施例中，所述第一折环段与所述第二折环段间隔设置。
在所述下振膜的一些实施例中，所述第一折环段和所述第二折环段在垂直于所述振动方向的平面上的正投影均呈U形且U形开口相对；
所述第一折环段的拐角处形成有第一褶皱区，所述第二折环段的拐角处形成有第二褶皱区。
为了解决上述技术问题，本申请采用的技术方案二为：
一种模具，所述模具用于制作如上述所述的下振膜。
在所述模具的一些实施例中，所述模具包括成型面，所述成型面形成有与所述第一折环段相匹配的第一凹槽和与所述第二折环段相匹配的第二凹槽。
在所述模具的一些实施例中，所述成型面还形成有第三凹槽，所述第三凹槽呈环状且环设于所述第一凹槽和所述第二凹槽的外侧。
在所述模具的一些实施例中，所述成型面上具有通孔，所述通孔贯穿所述模具。
为了解决上述技术问题，本申请采用的技术方案三为：
一种扬声器，包括振动系统、驱动所述振动系统振动发声的磁路系统以及固定所述振动系统和所述磁路系统的盆架，所述磁路系统具有磁间隙，所述振动系统包括音膜、支撑在所述音膜靠近所述磁路系统一侧的音圈、固定于所述音圈的电路板以及固定于所述音圈远离所述音膜一侧的所述下振膜，所述音圈远离所述音膜的一侧插置于所述磁间隙内；所述电路板包括沿第一方向对称设置在所述音圈相对两侧的第一柔性电路板和第二柔性电路板，所述音圈与所述第一柔性电路板电连接，所述第一柔性电路板和所述音膜沿所述音膜的振动方向相对设置且分别与所述盆架连接，所述第二柔性电路板和所述音膜沿所述振动方向相对设置且分别与所述盆架连接，所述扬声器还包括如上述所述的下振膜。
在所述扬声器的一些实施例中，所述磁路系统包括磁碗、固定于所述磁碗的主磁钢以及环设于所述主磁钢的副磁钢，所述磁间隙形成于所述主磁钢与所述副磁钢之间；
所述磁路系统还包括主极芯和夹板，所述主极芯位于所述主磁钢与所述音膜之间且叠设于所述主磁钢，所述夹板包括与所述盆架连接的固定件和位于所述固定件上的副极芯，所述副极芯位于所述副磁钢与所述音膜之间且叠设于所述副磁钢。
在所述扬声器的一些实施例中，所述扬声器还包括支撑骨架，所述支撑骨架架设于所述音圈与所述音膜之间，所述支撑骨架远离所述音膜的一侧沿所述音圈外周延伸形成与所述第一柔性电路板和所述第二柔性电路板连接的连接部。
 有益效果
本申请的有益效果在于：
上述下振膜，采用刚度不同的第一折环段和第二折环段，将刚度较大的第一折环段正对与音圈的引出线焊接的第一柔性电路板，第一折环段的第一固定部和第二固定部将位于第一柔性电路板一侧的音圈部分和磁路系统部分连接，可以弥补因为交流电流引起发热而变软的第一柔性电路板的刚度减小，从而抑制摇摆。
 附图说明
图1为现有扬声器上的主视图；
图2为本申请的下振膜的结构示意图；
图3为图2中A-A向剖面图；
图4为图2中B-B向剖面图；
图5为本申请的模具的结构示意图；
图6为图5中C-C向剖视图；
图7为本申请的扬声器的结构示意图；
图8为图7中D-D向剖视图；
图9为图7所示扬声器爆炸图；
图10为本申请的下振膜的刚度仿真曲线。
 本发明的实施方式
下面结合附图和实施方式对本申请作进一步说明。
请一并结合图2至图9，现对本申请提供的下振膜600进行说明。一种下振膜600，该下振膜600设置于扬声器10，扬声器10包括振动系统100和驱动振动系统100振动发声的磁路系统200，磁路系统200具有磁间隙210，振动系统100包括音膜110、支撑在音膜110靠近磁路系统200一侧的音圈120、固定于音圈120的电路板以及固定于音圈120远离音膜110一侧的下振膜600。音圈120远离音膜110的一侧插置于磁间隙210内。电路板包括沿第一方向对称设置在音圈120相对两侧的第一柔性电路板400和第二柔性电路板500。音圈120的引出线与第一柔性电路板400焊接。扬声器10工作时第一柔性电路板400由于交流电流引起发热而变软，刚度变小。第二柔性电路板500刚度则基本不变，这种工作时的刚度不对称会引起摇摆。摇摆会引发高次、纯音等问题，从而影响扬声器10正常使用。
进一步地，下振膜600包括与音圈120相对固定的第一固定部630、与磁路系统200相对固定并与第一固定部630间隔设置的第二固定部640以及连接在第一固定部630与第二固定部640之间的折环。进一步地，折环包括与第一柔性电路板400正对的第一折环段610、以及与第二柔性电路板500正对的第二折环段620。第一折环段610的刚度大于第二折环段620的刚度。本实施例中，第一折环段610的第一固定部630和第二固定部640通过第一柔性电路板400与音圈120和磁路系统200连接，第二折环段620的第一固定部630和第二固定部640通过第二柔性电路板500与音圈120和磁路系统200连接。进一步地，第一方向垂直于音膜110的振动方向。第一方向平行于图2中箭头X所指方向，振动方向平行于图2中箭头Y所指方向。本实施例中，第一折环段610向远离第一柔性电路板400凸起，第二折环段620向远离第二柔性电路板500凸起。
上述下振膜600，采用刚度不同的第一折环段610和第二折环段620，将刚度较大的第一折环段610正对与音圈120的引出线焊接的第一柔性电路板400，第一折环段610的第一固定部630和第二固定部640将位于第一柔性电路板400一侧的音圈120部分和磁路系统200部分连接，可以弥补因为交流电流引起发热而变软的第一柔性电路板400的刚度减小，从而抑制摇摆。
请一并结合图2至图4，第一折环段610包括与第一固定部630连接的第一连接面611、与第二固定部640连接的第二连接面612以及连接在第一连接面611和第二连接面612之间的第三连接面613。第二折环段620包括与第一固定部630连接的第四连接面621、与第二固定部640连接的第五连接面622以及连接在第四连接面621和第五连接面622之间的第六连接面623。即第一连接面611与第四连接面621的位置对称，第二连接面612与第五连接面622的位置对称，第三连接面613与第六连接面623的位置对称。进一步地，第一连接面611的曲率小于第四连接面621的曲率，第二连接面612的曲率小于第五连接面622的曲率，第三连接面613的曲率小于第六连接面623的曲率。通过改变各连接面的曲率可以调整第一折环段610和第二折环段620的刚度。通过限定位置对称的一组连接面的曲率关系，保证了第一折环段610的刚度大于第二折环段620的刚度。进一步地，本实施例中，第一连接面611、第二连接面612和第三连接面613均为平直面，第四连接面621、第五连接面622和第六连接面623均为弧形面，以使得第一折环段610相对于第二折环段620具有更大的刚度。
本实施例中，第一折环段610与第二折环段620间隔设置。第一折环段610和第二折环段620在垂直于振动方向的平面上的正投影均呈U形且U形开口相对。可以理解为在其他实施例中，正投影还可以为其他形状，例如，半圆弧状、直线状或波浪状。进一步地，第一折环段610的拐角处形成有第一褶皱区614，第二折环段620的拐角处形成有第二褶皱区624。进一步地，位于第一褶皱区614和第二褶皱区624上的褶皱的凸起方向与第一折环段610/第二折环段620凸起的方向相反，即褶皱在第一折环段610/第二折环段620上形成凹槽，可以理解为在其他实施例中，褶皱凸起的方向与第一折环段610/第二折环段620凸起的方向相同；或在其他实施中，部分褶皱凸起的方向与第一折环段610/第二折环段620凸起的方向相同，另一部分褶皱凸起的方向与第一折环段610/第二折环段620凸起的方向相反。
请一并结合图5和图6，本申请的实施例还公开了一种模具20，模具20用于制作下振膜600。模具20包括成型面21，成型面21形成有与第一折环段610相匹配的第一凹槽211和与第二折环段620相匹配的第二凹槽212，即在一副模具20上提供两种不同的折环段造型，可以不改变原有的装配工艺，节约了大量的人力和物力。下振膜600可以通过气压吹气成型，在下振膜600的加工过程中，将制作下振膜600的加工材料均匀的敷设于成型面21上，通过气爆结构对加工材料进行气爆成型，形成下振膜600。
进一步地，成型面21还形成有第三凹槽213，第三凹槽213呈环状且环设于第一凹槽211和第二凹槽212的外侧。第三凹槽213能够容纳更多的加工材料，气爆成型得到的下振膜600半成品在对应第三凹槽213的位置形成加强筋，有助于在启膜时增大下振膜600半成品的强度，以防止下振膜600半成品损坏。进一步地，成型面21上具有通孔214，通孔214贯穿模具20。通孔214便于通入气体，以使振膜半成品与成型面21分离。本实施例中，部分通孔214位于第三凹槽213。
请一并结合图2至图9，本申请的实施例还公开了一种扬声器10，包括振动系统100、驱动振动系统100振动发声的磁路系统200以及固定振动系统100和磁路系统200的盆架300，磁路系统200具有磁间隙210，振动系统100包括音膜110、支撑在音膜110靠近磁路系统200一侧的音圈120、固定于音圈120的电路板以及固定于音圈120远离音膜110一侧的下振膜600。音圈120由导线绕设而成，其上设置有用于音圈120导电的进出线。音圈120远离音膜110的一侧插置于磁间隙210内。音圈120通电后与磁路系统200产生电磁力，以驱动音膜110振动。本实施例中，音圈120呈矩形。
进一步地，电路板包括沿第一方向对称设置在音圈120相对两侧的第一柔性电路板400和第二柔性电路板500，音圈120与第一柔性电路板400电连接。
第一柔性电路板400和音膜110沿振动方向相对设置且分别与盆架300连接，第二柔性电路板500和音膜110沿振动方向相对设置且分别与盆架300连接。具体地，音膜110包括球顶111和环设于球顶111的上折环112，上折环112的外沿设置有用于固定上折环112的第三固定部1121，上折环112的内沿设置有与球顶111连接的连接部1122。具体地，上折环112通过第三固定部1121与盆架300连接。进一步地，第一折环段610通过第一固定部630和第二固定部640设置于第一柔性电路板400，第二折环段620通过第一固定部630和第二固定部640设置于第二柔性电路板500。第一折环段610、第二折环段620分别与音膜110相对设置。第一折环段610位于第一柔性电路板400远离音膜110的一侧，第二折环段620位于第二柔性电路板500远离音膜110的一侧。
进一步地，磁路系统200包括磁碗220、固定于磁碗220的主磁钢230以及环设于主磁钢230的副磁钢240，磁间隙210形成于主磁钢230与副磁钢240之间。本实施例中，副磁钢240的数量为两个且包括位于主磁钢230两侧，即磁路系统200为三磁钢磁路。进一步地，磁路系统200还包括主极芯250和夹板260。主极芯250位于主磁钢230与音膜110之间且叠设于主磁钢230。夹板260包括与盆架300连接的固定件261和位于固定件261上的副极芯262，固定件261呈环状，副极芯262位于副磁钢240与音膜110之间且叠设于副磁钢240。具体地，主磁钢230和主极芯250位于磁碗220的中心。主磁钢230和副磁钢240与磁碗220之间，主磁钢230与主极芯250之间以及副磁钢240与副极芯262之间均设有导磁片270。上述设置，进一步提高磁路系统200的性能，使磁路系统200的磁力线尽可能多的被音圈120切割，以形成更大的驱动力。
进一步地，扬声器10还包括支撑骨架700，支撑骨架700架设于音圈120与音膜110之间。支撑骨架700远离音膜110的一侧沿音圈120外周延伸形成与第一柔性电路板400和第二柔性电路板500连接的连接部701。具体地，支撑骨架700固接于球顶111下方，支撑骨架700与音圈120连接以将音圈120悬置于音膜110的下方。支撑骨架700将音圈120与第一柔性电路板400和第二柔性电路板500间接连接。通过第一柔性电路板400和第二柔性电路板500实现对音圈120的横向摆动的有效抑制，提高扬声器10的可靠性和稳定性。如图10所示，通过采用刚度不同的第一折环段610和第二折环段620，将刚度较大的第一折环段610设置于与音圈120的引出线焊接的第一柔性电路板400，可以弥补因为交流电流引起发热而变软的第一柔性电路板400的刚度减小，从而抑制摇摆。
以上所述的仅是本申请的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本申请创造构思的前提下，还可以做出改进，但这些均属于本申请的保护范围。

Claims (11)

  1. 一种下振膜，所述下振膜设置于扬声器，所述扬声器包括振动系统和驱动所述振动系统振动发声的磁路系统，所述磁路系统具有磁间隙，所述振动系统包括音膜、支撑在所述音膜靠近所述磁路系统一侧的音圈、固定于所述音圈的电路板以及固定于所述音圈远离所述音膜一侧的所述下振膜，所述音圈远离所述音膜的一侧插置于所述磁间隙内；所述电路板包括沿第一方向对称设置在所述音圈相对两侧的第一柔性电路板和第二柔性电路板，所述音圈的引出线与所述第一柔性电路板焊接，其特征在于：所述下振膜包括与所述音圈相对固定的第一固定部、与所述磁路系统相对固定并与所述第一固定部间隔设置的第二固定部以及连接在所述第一固定部与所述第二固定部之间的折环，所述折环包括与所述第一柔性电路板正对的第一折环段、以及与所述第二柔性电路板正对的第二折环段，所述第一折环段的刚度大于所述第二折环段的刚度，所述第一方向垂直于所述音膜的振动方向。
  2. 根据权利要求1所述的下振膜，其特征在于：所述第一折环段包括与所述第一固定部连接的第一连接面、与所述第二固定部连接的第二连接面以及连接在所述第一连接面和所述第二连接面之间的第三连接面；
    所述第二折环段包括与所述第一固定部连接的第四连接面、与所述第二固定部连接的第五连接面以及连接在所述第四连接面和所述第五连接面之间的第六连接面；
    其中，所述第一连接面的曲率小于所述第四连接面的曲率，所述第二连接面的曲率小于所述第五连接面的曲率，所述第三连接面的曲率小于所述第六连接面的曲率。
  3. 根据权利要求2所述的下振膜，其特征在于：所述第一折环段与所述第二折环段间隔设置。
  4. 根据权利要求3所述的下振膜，其特征在于：所述第一折环段和所述第二折环段在垂直于所述振动方向的平面上的正投影均呈U形且U形开口相对；
    所述第一折环段的拐角处形成有第一褶皱区，所述第二折环段的拐角处形成有第二褶皱区。
  5. 一种模具，其特征在于：所述模具用于制作如权利要求1~4任一权利要求所述的下振膜。
  6. 根据权利要求5所述的模具，其特征在于：所述模具包括成型面，所述成型面形成有与所述第一折环段相匹配的第一凹槽和与所述第二折环段相匹配的第二凹槽。
  7. 根据权利要求6所述的模具，其特征在于：所述成型面还形成有第三凹槽，所述第三凹槽呈环状且环设于所述第一凹槽和所述第二凹槽的外侧。
  8. 根据权利要求7所述的模具，其特征在于：所述成型面上具有通孔，所述通孔贯穿所述模具。
  9. 一种扬声器，包括振动系统、驱动所述振动系统振动发声的磁路系统以及固定所述振动系统和所述磁路系统的盆架，所述磁路系统具有磁间隙，所述振动系统包括音膜、支撑在所述音膜靠近所述磁路系统一侧的音圈、固定于所述音圈的电路板以及固定于所述音圈远离所述音膜一侧的所述下振膜，所述音圈远离所述音膜的一侧插置于所述磁间隙内；所述电路板包括沿第一方向对称设置在所述音圈相对两侧的第一柔性电路板和第二柔性电路板，所述音圈与所述第一柔性电路板电连接，所述第一柔性电路板和所述音膜沿所述音膜的振动方向相对设置且分别与所述盆架连接，所述第二柔性电路板和所述音膜沿所述振动方向相对设置且分别与所述盆架连接，其特征在于：所述扬声器还包括如权利要求1~4任一权利要求所述的下振膜。
  10. 根据权利要求9所述的扬声器，其特征在于：所述磁路系统包括磁碗、固定于所述磁碗的主磁钢以及环设于所述主磁钢的副磁钢，所述磁间隙形成于所述主磁钢与所述副磁钢之间；
    所述磁路系统还包括主极芯和夹板，所述主极芯位于所述主磁钢与所述音膜之间且叠设于所述主磁钢，所述夹板包括与所述盆架连接的固定件和位于所述固定件上的副极芯，所述副极芯位于所述副磁钢与所述音膜之间且叠设于所述副磁钢。
  11. 根据权利要求9所述的扬声器，其特征在于：所述扬声器还包括支撑骨架，所述支撑骨架架设于所述音圈与所述音膜之间，所述支撑骨架远离所述音膜的一侧沿所述音圈外周延伸形成与所述第一柔性电路板和所述第二柔性电路板连接的连接部。
PCT/CN2020/102393 2020-07-09 2020-07-16 下振膜、模具及扬声器 Ceased WO2022006955A1 (zh)

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