WO2022006985A1 - 扬声器 - Google Patents

扬声器 Download PDF

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Publication number
WO2022006985A1
WO2022006985A1 PCT/CN2020/102727 CN2020102727W WO2022006985A1 WO 2022006985 A1 WO2022006985 A1 WO 2022006985A1 CN 2020102727 W CN2020102727 W CN 2020102727W WO 2022006985 A1 WO2022006985 A1 WO 2022006985A1
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WO
WIPO (PCT)
Prior art keywords
circuit board
flexible circuit
voice coil
folded ring
diaphragm
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/CN2020/102727
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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
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 Technologies Pte Ltd filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2022006985A1 publication Critical patent/WO2022006985A1/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
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • 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 loudspeaker.
  • the conventional SLS upper diaphragm ( Figure 1) 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 is working, and the stiffness becomes smaller. The stiffness of the FPC on the other side is basically unchanged, and this stiffness asymmetry during work will cause rocking, as shown in Figure 2.
  • Swing will cause inconsistent amplitude of the diaphragm on the pad side and non-pad side, resulting in problems such as high order and pure tone, which will affect the normal use of the product.
  • the purpose of the present application is to provide a loudspeaker to solve the problem of rocking caused by asymmetric stiffness of the current loudspeaker's FPC when it is energized.
  • a loudspeaker includes a basin frame, a vibration system and a magnetic circuit system supported and fixed on the basin frame, the vibration system includes a vibrating membrane fixed on the basin frame, a voice coil fixed on the vibrating membrane, and a a flexible circuit board for introducing an external electrical signal to the voice coil;
  • the flexible circuit board includes a first flexible circuit board symmetrically arranged on opposite sides of the voice coil along a first direction A circuit board and a second flexible circuit board, the first direction is perpendicular to the vibration direction of the diaphragm, the voice coil introduces an external electrical signal through the first flexible circuit board, wherein the diaphragm includes a dome and a fold ring arranged around the dome, the fold ring comprising a first fold ring segment and a second fold ring segment arranged on opposite sides of the dome along the first direction, the first flexible circuit
  • the plate and the first folded ring segment are arranged opposite to each other along the vibration direction of the diaphragm, the second flexible circuit board and the second folded
  • the folded ring includes a third folded ring segment disposed on opposite sides of the dome along the second direction and connected to the adjacent first and second folded ring segments.
  • the two directions are perpendicular to the first direction and the vibration direction of the diaphragm.
  • the first folded ring segment is formed with a first folded area
  • the second folded ring segment is formed with a second folded area
  • the folded density of the first folded area is greater than that of the second folded area
  • the first folded ring segment includes a first connecting portion and a first corner portion located at both ends of the first connecting portion and connected to the third folded ring segment, and the first folded area is formed in the The first corner portion
  • the second loop segment includes a second connecting portion and a second corner portion located at both ends of the second connecting portion and connected with the third loop segment, the second pleated area formed on the second corner.
  • the speaker further includes a support frame, the support frame is erected between the voice coil and the diaphragm, and the support frame includes a body sandwiched between the diaphragm and the voice coil and extending from the body portion away from the diaphragm along the outer circumference of the voice coil to form a connection portion connected to the first flexible circuit board and the second flexible circuit board.
  • the vibration system further includes two centering support pieces arranged symmetrically along the first direction, and the two centering support pieces are fixed on the first flexible circuit board and the second flexible circuit board The side away from the vibrating membrane is in one-to-one correspondence with the first flexible circuit board and the second flexible circuit board.
  • the peripheral edge of the dome is formed with a step connected with the folded ring.
  • the folded ring includes a first fixing portion fixed on the step, a folded ring portion bent and extended from the first fixing portion away from the dome, and a folded ring portion extended from the folded ring portion and fixed on the
  • the second fixing part of the basin frame; the folded ring part includes the first folded ring segment and the second folded ring segment arranged on opposite sides of the dome along the first direction.
  • 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 spaced from the main magnetic steel to form a magnetic gap, the audio The ring is at least partially inserted in the magnetic gap; the auxiliary magnetic steel at least includes a first auxiliary magnetic steel disposed opposite to both ends of the main magnetic steel along the first direction, and the centering support piece penetrates through to form a a hole, and the first auxiliary magnetic steel is at least partially accommodated in the through hole.
  • the magnetic circuit system further includes a main pole core stacked on the main magnet steel and a splint fixed on the basin frame and covering at least the secondary magnet steel, the splint comprising a splint fixed on the basin frame
  • the fixing piece and the secondary pole core extending from the fixing piece to the secondary magnetic steel and stacked on the secondary magnetic steel.
  • the diaphragm of the above-mentioned loudspeaker adopts the first folded ring segment and the second folded ring segment with different stiffnesses, and the first folded ring segment with greater rigidity is arranged opposite to the first flexible circuit board for introducing external electrical signals for the voice coil, so that the It compensates for the sway caused by the reduction in stiffness of the first flexible circuit board, which becomes soft due to the heat generated by the alternating current, so as to improve the high-order, pure sound and other problems of the speaker.
  • Fig. 1 is the structure diagram of the existing loudspeaker diaphragm
  • Figure 2 is the amplitude test curve of the five points (1, 2, 3, 4 and C) in Figure 1;
  • FIG. 3 is a schematic structural diagram of a loudspeaker of the application.
  • Fig. 4 is A-A sectional view in Fig. 3;
  • Figure 5 is an exploded view of the loudspeaker shown in Figure 3;
  • FIG. 6 is a schematic diagram of a partial assembly structure of the speaker of the application.
  • Fig. 8 is a sectional view taken along the direction B-B in Fig. 7;
  • FIG. 9 is an enlarged structural schematic diagram of part C in FIG. 8 .
  • the embodiment of the present application discloses a speaker 10, including a basin frame 300, a vibration system 100 and a magnetic circuit system 200 supported and fixed on the basin frame 300, and the vibration system 100 includes a base fixed on the basin frame 300.
  • the flexible circuit board includes a flexible circuit board along the first direction
  • the first direction is perpendicular to the vibration direction of the diaphragm 110 .
  • the voice coil 120 is formed by winding a wire, and an external electrical signal is introduced through 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 stiffness asymmetry during operation may cause swaying, as shown in FIG. 2 . Swing will cause problems such as high order and pure tone, which will affect the normal use of the speaker 10 .
  • the diaphragm 110 includes a dome 112 and a fold ring 111 arranged around the dome 112
  • the fold ring 111 includes a first fold ring segment 1111 and a second fold ring segment arranged on opposite sides of the dome 112 along the first direction 1112
  • the first flexible circuit board 400 and the first ring segment 1111 are disposed opposite to each other along the vibration direction of the diaphragm 110 . That is, the first ring segment 1111 is close to one side of the first flexible circuit board 400 and is disposed opposite to the first flexible circuit board 400 along the vibration direction of the diaphragm 110 .
  • the second flexible circuit board 500 and the second ring segment 1112 are disposed opposite to each other along the vibration direction of the diaphragm 110 . That is, the second loop segment 1112 is close to the side of the second flexible circuit board 500 .
  • the stiffness of the first shroud segment 1111 is greater than the stiffness of the second shroud segment 1112 .
  • the fold ring 111 protrudes away from the first flexible circuit board 400 and the second flexible circuit board 500 , but it can be understood that in other embodiments, the fold ring 111 may also protrude toward the first flexible circuit board 400 and the second flexible circuit board 500 .
  • the flexible circuit board 500 is raised.
  • the above-mentioned diaphragm 110 adopts the first folded ring segment 1111 and the second folded ring segment 1112 with different stiffnesses, and the first folded ring segment 1111 with greater stiffness and the first flexible circuit board 400 for introducing external electrical signals for the voice coil 120
  • the relative arrangement can compensate for the sway caused by the reduction of the stiffness of the first flexible circuit board 400 which becomes soft due to the heat generated by the alternating current, thereby improving the high-order, pure tone and other problems of the speaker 10 .
  • the folding ring 111 includes a third folding ring segment 1113 disposed on opposite sides of the dome 112 along the second direction and connecting the adjacent first folding ring segment 1111 and the second folding ring segment 1112, and the second direction is perpendicular to the first folding ring segment 1113.
  • one direction and the vibration direction of the diaphragm 110 are parallel to the direction indicated by arrow X in FIG. 3
  • the second direction is parallel to the direction indicated by arrow Y in FIG. 3
  • the vibration direction of the diaphragm 110 is parallel to the direction indicated by arrow Z in FIG. 3 .
  • the first folded ring segment 1111 is formed with a first wrinkle area 11111
  • the second folded ring segment 1112 is formed with a second wrinkled area 11121
  • the wrinkle density of the first wrinkle area 11111 is greater than that of the second wrinkle area 11121 .
  • the folds can be used to adjust the stiffness of the folding ring 111, and the denser the folds, that is, the higher the density of the folds, the greater the stiffness.
  • the protruding direction of the pleats is the same as the protruding direction of the folding ring 111 . It can be understood that in other embodiments, the protruding direction of the pleats is opposite to the protruding direction of the folding ring 111 .
  • a groove is formed thereon; or in other implementations, the direction of part of the pleats is the same as the direction of the bulging ring 111 , and the direction of the other part of the wrinkle is opposite to the direction of the bulging ring 111 .
  • the first folded ring segment 1111 includes a first connection portion 11112 and a first corner portion 11113 located at both ends of the first connection portion 11112 and connected to the third folded ring segment 1113, and the first folded region 11111 is formed at the first corner part 11113
  • the second folded ring segment 1112 includes a second connection part 11122 and a second corner part 11123 located at both ends of the second connection part 11122 and connected with the third folded ring segment 1113
  • the second pleated area 11121 is formed at the second corner Section 11123.
  • the wrinkles are only formed on the first corner portion 11113 and the second corner portion 11123.
  • the wrinkles can also be formed on the first connecting portion 11112 and the second connecting portion 11122, which are located at the first connecting portion 11112 and the second connecting portion 11122.
  • the wrinkle density on the connecting portion 11112 is greater than the wrinkling density on the second connecting portion 11122 .
  • the folding ring 111 is in the shape of a rectangle with rounded corners, and the two first corners 11113 and the two second corners 11123 are located at four corners of the folding ring 111 , respectively. It can be understood that in other embodiments, the folding ring 111 may also be in other shapes, for example, a circle or an ellipse.
  • FIG. 6 is a partial assembly structure of the speaker 10 after the diaphragm 110 and the clamping plate 270 are removed.
  • the speaker 10 further includes a support frame 700 , the support frame 700 is erected between the voice coil 120 and the diaphragm 110 , and the support frame 700 includes a body portion 710 sandwiched between the diaphragm 110 and the voice coil 120 , and a body portion 710 along the sound path.
  • the outer circumference of the ring 120 extends away from the diaphragm 110 to form a connecting portion 720 that is connected to the first flexible circuit board 400 and the second flexible circuit board 500 .
  • the voice coil 120 is connected to the diaphragm 110 and the first flexible circuit board 400 and the second flexible circuit board 500 through the voice coil bobbin 700 , and the lateral swing of the voice coil 120 is realized through the first flexible circuit board 400 and the second flexible circuit board 500
  • the effective suppression of the speaker 10 improves the reliability and stability of the speaker 10.
  • the vibration system 100 further includes two centering support pieces 600 symmetrically arranged along the first direction, and the two centering support pieces 600 are fixed on the first flexible circuit board 400 and the second flexible circuit board 500 away from the diaphragm 110 .
  • One side corresponds to the first flexible circuit board 400 and the second flexible circuit board 500 one-to-one.
  • the folding ring 111 and the dome 112 are separate structures, and a step 1121 connected to the folding ring 111 is formed on the periphery of the dome 112 .
  • the folded ring 111 includes a first fixing portion 1114 fixed on the step 1121 , a folded ring portion 1115 bent and extended from the first fixing portion 1114 away from the dome 112 , and a folded ring portion 1115 extending from the folded ring portion and fixed to the basin frame 300 .
  • the second fixing portion 1116 ; the folded ring portion 1115 includes a first folded ring segment 1111 and a second folded ring segment 1112 disposed on opposite sides of the dome 112 along the first direction.
  • the folding ring 111 and the dome 112 may also be integral structures.
  • the dome 112 is a flat plate-like structure, but it can be understood that in other embodiments, the dome 112 can also be an arched structure with a circular arc-shaped cross-section that is convex upward or concave downward.
  • 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 arranged around the main magnetic steel 230 and spaced from the main magnetic steel 230 to form a magnetic gap 210.
  • the voice coil 120 is at least A part is inserted into the magnetic gap 210 to drive the diaphragm 110 to vibrate.
  • the voice coil 120 is rectangular.
  • the secondary magnets include first secondary magnets 240 disposed opposite to both ends of the main magnet 230 along the first direction and second secondary magnets 250 located on both sides of the primary magnet 230 along the second direction, that is, the magnetic circuit system. 200 is a five-magnet magnetic circuit.
  • the magnetic circuit system 200 further includes a main pole core 260 stacked on the main magnetic steel 230 and a splint 270 fixed to the basin frame 300 and covering at least the secondary magnetic steel.
  • the splint 270 includes a fixing member 271 fixed to the basin frame 300 and
  • the secondary pole core 272 extends from the fixing member 271 to the secondary magnetic steel and is stacked on the secondary magnetic steel.
  • the main magnetic steel 230 and the main pole core 260 are located in the center of the magnetic bowl 220 . 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 centering support piece 600 penetrates through to form a through hole 610, and the first auxiliary magnetic steel 240 is at least partially accommodated in the through hole 610, so as to ensure that the vibration of the centering support piece 600 is not hindered by the first auxiliary magnetic steel 240, and at the same time, the first auxiliary magnetic steel 240 is further increased.
  • the volume of the secondary magnet 240 enhances the performance of the magnetic circuit system.
  • the diaphragm of the present application adopts the first folded ring segment and the second folded ring segment with different stiffnesses, and the first folded ring segment with higher stiffness is opposed to the first flexible circuit board for introducing external electrical signals for the voice coil.
  • the arrangement can make up for the sway caused by the reduction of the stiffness of the first flexible circuit board, which becomes soft due to the heat generated by the alternating current, thereby improving the high-order and pure sound of the speaker.

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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

本申请提供了一种扬声器。该扬声器包括盆架以及支撑固定于盆架的振动系统和磁路系统，该振动系统包括固定于盆架的振膜、固定于振膜的音圈以及固定于盆架远离振膜一侧并为音圈引入外部电信号的柔性电路板。该柔性电路板包括沿第一方向对称设置于音圈相对两侧的第一柔性电路板和第二柔性电路板。音圈通过第一柔性电路板引入外部电信号。上述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与为音圈引入外部电信号的第一柔性电路板相对设置，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而导致的摇摆，从而改善扬声器的高次、纯音等问题。

Description

扬声器 技术领域
本申请涉及电声转换领域，尤其涉及一种扬声器。
 背景技术
常规SLS上振膜(图1)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，如图2所示。
 技术问题
摇摆会引发振膜在焊盘侧和非焊盘侧的振幅不一致，导致高次、纯音等问题，从而影响产品正常使用。
因此，有必要提供一种扬声器来克服上述问题。
 技术解决方案
本申请的目的在于提供一种扬声器，以解决目前扬声器的FPC通电时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为：
一种扬声器，包括盆架以及支撑固定于所述盆架的振动系统和磁路系统，所述振动系统包括固定于所述盆架的振膜、固定于所述振膜的音圈以及固定于所述盆架远离所述振膜一侧并为所述音圈引入外部电信号的柔性电路板；所述柔性电路板包括沿第一方向对称设置于所述音圈相对两侧的第一柔性电路板和第二柔性电路板，所述第一方向垂直于所述振膜的振动方向，所述音圈通过所述第一柔性电路板引入外部电信号，其中，所述振膜包括球顶以及环绕所述球顶设置的折环，所述折环包括沿所述第一方向设置于所述球顶相对两侧的第一折环段和第二折环段，所述第一柔性电路板和所述第一折环段沿所述振膜的振动方向相对设置，所述第二柔性电路板和所述第二折环段沿所述振膜的振动方向相对设置，所述第一折环段的刚度大于所述第二折环段的刚度。
优选地，所述折环包括沿第二方向设置于所述球顶相对两侧且连接相邻所述第一折环段和所述第二折环段的第三折环段，所述第二方向垂直于所述第一方向和所述振膜的振动方向。
优选地，所述第一折环段形成有第一褶皱区，所述第二折环段形成有第二褶皱区，所述第一褶皱区的褶皱密度大于所述第二褶皱区的褶皱密度。
优选地，所述第一折环段包括第一连接部和位于所述第一连接部两端并与所述第三折环段连接的第一拐角部，所述第一褶皱区形成于所述第一拐角部，所述第二折环段包括第二连接部和位于所述第二连接部两端并与所述第三折环段连接的第二拐角部，所述第二褶皱区形成于所述第二拐角部。
优选地，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振膜之间，所述支撑骨架包括夹设于所述振膜与所述音圈之间的本体部以及自所述本体部沿所述音圈外周向远离所述振膜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。
优选地，所述振动系统还包括沿所述第一方向对称设置的两个定心支片，两个所述定心支片固定在所述第一柔性电路板和所述第二柔性电路板远离所述振膜的一侧并与所述第一柔性电路板和所述第二柔性电路板一一对应。
优选地，所述球顶周缘形成有与所述折环连接的台阶。
优选地，所述折环包括固定于所述台阶的第一固定部、自所述第一固定部向远离所述球顶弯折延伸的折环部以及自所述折环部延伸并固定于所述盆架的第二固定部；所述折环部包括沿所述第一方向设置于所述球顶相对两侧的所述第一折环段和所述第二折环段。
优选地，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并与所述主磁钢间隔形成磁间隙的副磁钢，所述音圈至少部分插设于所述磁间隙内；所述副磁钢至少包括沿所述第一方向相对所述主磁钢两端设置的第一副磁钢，所述定心支片贯穿形成通孔，所述第一副磁钢至少部分收容于所述通孔内。
优选地，所述磁路系统还包括叠设于所述主磁钢的主极芯以及固定于所述盆架并至少覆盖所述副磁钢的夹板，所述夹板包括固定于所述盆架的固定件和自所述固定件向所述副磁钢延伸并叠设于所述副磁钢的副极芯。
 有益效果
本申请的有益效果在于：
上述扬声器的振膜，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与为音圈引入外部电信号的第一柔性电路板相对设置，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而导致的摇摆，从而改善扬声器的高次、纯音等问题。
 附图说明
图1为现有扬声器振膜的结构图；
图2为图1中五点（1、2、3、4和C）振幅测试曲线；
图3为本申请的扬声器的结构示意图；
图4为图3中A-A向剖视图；
图5为图3所示扬声器爆炸图；
图6为本申请扬声器的部分组装结构示意图；
图7为本申请的振膜的结构示意图；
图8为图7中B-B向剖视图；
图9为图8中C部分放大结构示意图。
 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3至图9，本申请的实施例公开了一种扬声器10，包括盆架300以及支撑固定于盆架300的振动系统100和磁路系统200，振动系统100包括固定于盆架300的振膜110、固定于振膜110的音圈120以及固定于盆架300远离振膜110一侧并为音圈120引入外部电信号的柔性电路板，柔性电路板包括沿第一方向对称设置于音圈120相对两侧的第一柔性电路板400和第二柔性电路板500，第一方向垂直于振膜110的振动方向。进一步地，音圈120由导线绕设而成，并通过第一柔性电路板400引入外部电信号。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，如图2所示。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，振膜110包括球顶112以及环绕球顶112设置的折环111，折环111包括沿第一方向设置于球顶112相对两侧的第一折环段1111和第二折环段1112，第一柔性电路板400和第一折环段1111沿振膜110的振动方向相对设置。即第一折环段1111靠近第一柔性电路板400的一侧且与第一柔性电路板400沿振膜110的振动方向相对设置。第二柔性电路板500和第二折环段1112沿振膜110的振动方向相对设置。即第二折环段1112靠近第二柔性电路板500一侧。第一折环段1111的刚度大于第二折环段1112的刚度。
本实施例中，折环111向远离第一柔性电路板400和第二柔性电路板500凸起，可以理解为在其他实施例中，折环111还可以向第一柔性电路板400和第二柔性电路板500凸起。上述振膜110，采用刚度不同的第一折环段1111和第二折环段1112，将刚度较大的第一折环段1111与为音圈120引入外部电信号的第一柔性电路板400相对设置，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的刚度减小而导致的摇摆，从而改善扬声器10的高次、纯音等问题。
进一步地，折环111包括沿第二方向设置于球顶112相对两侧且连接相邻第一折环段1111和第二折环段1112的第三折环段1113，第二方向垂直于第一方向和振膜110的振动方向。第一方向平行于图3中箭头X所指方向，第二方向平行于图3中箭头Y所指方向，振膜110的振动方向平行于图3中箭头Z所指方向。进一步地，第一折环段1111形成有第一褶皱区11111，第二折环段1112形成有第二褶皱区11121，第一褶皱区11111的褶皱密度大于第二褶皱区11121的褶皱密度。褶皱可以用于调整折环111的刚度，褶皱越密，即褶皱的密度越大，刚度越大。本实施例中，褶皱凸起的方向与折环111凸起的方向相同，可以理解为在其他实施例中，褶皱凸起的方向与折环111凸起的方向相反，即褶皱在折环111上形成凹槽；或在其他实施中，部分褶皱凸起的方向与折环111凸起的方向相同，另一部分褶皱凸起的方向与折环111凸起的方向相反。
进一步地，第一折环段1111包括第一连接部11112和位于第一连接部11112两端并与第三折环段1113连接的第一拐角部11113，第一褶皱区11111形成于第一拐角部11113，第二折环段1112包括第二连接部11122和位于第二连接部11122两端并与第三折环段1113连接的第二拐角部11123，第二褶皱区11121形成于第二拐角部11123。本实施例中，褶皱只形成于第一拐角部11113和第二拐角部11123，可以理解为在其他实施例中，褶皱还可以形成于第一连接部11112和第二连接部11122，位于第一连接部11112上的褶皱密度大于位于第二连接部11122上的褶皱密度。本实施例中，折环111呈圆角矩形状，两个第一拐角部11113和两个第二拐角部11123分别位于折环111的四个角部。可以理解为在其他实施例中，折环111还可以为其他形状，例如，圆形或椭圆形。
请一并结合图4至图9，其中，图6为去掉振膜110和夹板270后的扬声器10的部分组装结构。扬声器10还包括支撑骨架700，支撑骨架700架设于音圈120与振膜110之间，支撑骨架700包括夹设于振膜110与音圈120之间的本体部710以及自本体部710沿音圈120外周向远离振膜110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720。音圈120通过音圈骨架700与振膜110和第一柔性电路板400和第二柔性电路板500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。
进一步地，振动系统100还包括沿第一方向对称设置的两个定心支片600，两个定心支片600固定在第一柔性电路板400和第二柔性电路板500远离振膜110的一侧并与第一柔性电路板400和第二柔性电路板500一一对应。
进一步地，本实施例中，折环111与球顶112为分体结构，球顶112周缘形成有与折环111连接的台阶1121。进一步地，折环111包括固定于台阶1121的第一固定部1114、自第一固定部1114向远离球顶112弯折延伸的折环部1115以及自折环部延伸并固定于盆架300的第二固定部1116；折环部1115包括沿第一方向设置于球顶112相对两侧的第一折环段1111和第二折环段1112。可以理解为在其他实施例中，折环111与球顶112也可以为一体结构。进一步地，本实施例中，球顶112为平板状结构，可以理解为在其他实施例中，球顶112也可以是向上凸起或向下凹陷的截面呈圆弧形的拱形结构。
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并与主磁钢230间隔形成磁间隙210的副磁钢，音圈120至少部分插设于磁间隙210内，以驱动振膜110振动。本实施例中，音圈120呈矩形。进一步地，副磁钢包括沿第一方向相对主磁钢230两端设置的第一副磁钢240和沿第二方向位于主磁钢230两侧的第二副磁钢250，即磁路系统200为五磁钢磁路。进一步地，磁路系统200还包括叠设于主磁钢230的主极芯260以及固定于盆架300并至少覆盖副磁钢的夹板270，夹板270包括固定于盆架300的固定件271和自固定件271向副磁钢延伸并叠设于副磁钢的副极芯272。具体地，主磁钢230和主极芯260位于磁碗220的中心。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。定心支片600贯穿形成通孔610，第一副磁钢240至少部分收容于通孔610内，保证定心支片600振动不受第一副磁钢240阻碍，同时进一步增大了第一副磁钢240的体积，增强磁路系统的性能。
综上，本申请的振膜，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与为音圈引入外部电信号的第一柔性电路板相对设置，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而导致的摇摆，从而改善扬声器的高次、纯音等问题。
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 (10)

  1. 一种扬声器，包括盆架以及支撑固定于所述盆架的振动系统和磁路系统，所述振动系统包括固定于所述盆架的振膜、固定于所述振膜的音圈以及固定于所述盆架远离所述振膜一侧并为所述音圈引入外部电信号的柔性电路板；所述柔性电路板包括沿第一方向对称设置于所述音圈相对两侧的第一柔性电路板和第二柔性电路板，所述第一方向垂直于所述振膜的振动方向，所述音圈通过所述第一柔性电路板引入外部电信号，其特征在于，所述振膜包括球顶以及环绕所述球顶设置的折环，所述折环包括沿所述第一方向设置于所述球顶相对两侧的第一折环段和第二折环段，所述第一柔性电路板和所述第一折环段沿所述振膜的振动方向相对设置，所述第二柔性电路板和所述第二折环段沿所述振膜的振动方向相对设置，所述第一折环段的刚度大于所述第二折环段的刚度。
  2. 根据权利要求1所述的扬声器，其特征在于：所述折环包括沿第二方向设置于所述球顶相对两侧且连接相邻所述第一折环段和所述第二折环段的第三折环段，所述第二方向垂直于所述第一方向和所述振膜的振动方向。
  3. 根据权利要求2所述的扬声器，其特征在于：所述第一折环段形成有第一褶皱区，所述第二折环段形成有第二褶皱区，所述第一褶皱区的褶皱密度大于所述第二褶皱区的褶皱密度。
  4. 根据权利要求3所述的扬声器，其特征在于：所述第一折环段包括第一连接部和位于所述第一连接部两端并与所述第三折环段连接的第一拐角部，所述第一褶皱区形成于所述第一拐角部，所述第二折环段包括第二连接部和位于所述第二连接部两端并与所述第三折环段连接的第二拐角部，所述第二褶皱区形成于所述第二拐角部。
  5. 根据权利要求1~4任一权利要求所述的扬声器，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振膜之间，所述支撑骨架包括夹设于所述振膜与所述音圈之间的本体部以及自所述本体部沿所述音圈外周向远离所述振膜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。
  6. 根据权利要求5所述的扬声器，其特征在于：所述振动系统还包括沿所述第一方向对称设置的两个定心支片，两个所述定心支片固定在所述第一柔性电路板和所述第二柔性电路板远离所述振膜的一侧并与所述第一柔性电路板和所述第二柔性电路板一一对应。
  7. 根据权利要求6所述的扬声器，其特征在于：所述球顶周缘形成有与所述折环连接的台阶。
  8. 根据权利要求7所述的扬声器，其特征在于：所述折环包括固定于所述台阶的第一固定部、自所述第一固定部向远离所述球顶弯折延伸的折环部以及自所述折环部延伸并固定于所述盆架的第二固定部；所述折环部包括沿所述第一方向设置于所述球顶相对两侧的所述第一折环段和所述第二折环段。
  9. 根据权利要求6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并与所述主磁钢间隔形成磁间隙的副磁钢，所述音圈至少部分插设于所述磁间隙内；
    所述副磁钢至少包括沿所述第一方向相对所述主磁钢两端设置的第一副磁钢，所述定心支片贯穿形成通孔，所述第一副磁钢至少部分收容于所述通孔内。
  10. 根据权利要求9所述的扬声器，其特征在于，所述磁路系统还包括叠设于所述主磁钢的主极芯以及固定于所述盆架并至少覆盖所述副磁钢的夹板，所述夹板包括固定于所述盆架的固定件和自所述固定件向所述副磁钢延伸并叠设于所述副磁钢的副极芯。
PCT/CN2020/102727 2020-07-09 2020-07-17 扬声器 Ceased WO2022006985A1 (zh)

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