WO2022007020A1 - Haut-parleur - Google Patents

Haut-parleur Download PDF

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Publication number
WO2022007020A1
WO2022007020A1 PCT/CN2020/104495 CN2020104495W WO2022007020A1 WO 2022007020 A1 WO2022007020 A1 WO 2022007020A1 CN 2020104495 W CN2020104495 W CN 2020104495W WO 2022007020 A1 WO2022007020 A1 WO 2022007020A1
Authority
WO
WIPO (PCT)
Prior art keywords
diaphragm
fixed
voice coil
auxiliary
magnetic
Prior art date
Application number
PCT/CN2020/104495
Other languages
English (en)
Chinese (zh)
Inventor
肖波
令狐荣林
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)有限公司
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 瑞声声学科技(深圳)有限公司, 瑞声科技(新加坡)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2022007020A1 publication Critical patent/WO2022007020A1/fr

Links

Classifications

    • 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
    • H04R9/02—Details
    • 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

Definitions

  • the present invention relates to the field of acoustics and electricity, in particular to a loudspeaker used in portable electronic products.
  • the speaker in the related art includes a basin frame, a vibration system and a magnetic circuit system.
  • the vibration system includes a vibrating membrane fixed on the basin frame, a voice coil that drives the vibrating membrane to vibrate and sound, and an elastic support member.
  • One end of the elastic support member is fixed relative to the basin frame. The other end is connected with the vibrating membrane through the skeleton.
  • the elastic support member includes an auxiliary vibrating membrane.
  • the auxiliary vibrating membrane includes a holding portion fixed relative to the basin frame, and a ring portion and a joint portion formed by extending inward from the holding portion.
  • the magnetic circuit system has a The magnetic yoke is fixed on the basin frame, and the folded ring part is an arc-shaped structure that protrudes and extends toward the magnetic yoke.
  • this kind of speaker is prone to the problem that the magnetic circuit system is dented due to the deformation of the magnetic yoke when it is dropped.
  • the purpose of the present invention is to provide a loudspeaker, which can effectively prevent the problem of the magnetic circuit system being dented due to the deformation of the magnetic yoke during a fall.
  • the present invention provides a loudspeaker, including a basin frame, a vibration system accommodated in the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and emit sound and has a magnetic gap
  • the vibration system includes a retaining The diaphragm of the basin frame, the voice coil assembly fixed to the diaphragm, and the auxiliary diaphragm arranged at intervals from the diaphragm, one end of the auxiliary diaphragm is fixed to the basin frame, and the other end of the auxiliary diaphragm is fixed
  • the magnetic circuit system includes a magnetic yoke fixed on the basin frame, and the side of the magnetic yoke close to the auxiliary diaphragm is away from the auxiliary diaphragm.
  • the diaphragm is recessed to form a groove, and the orthographic projection of the auxiliary diaphragm on the magnetic yoke along the vibration direction of the diaphragm is at least partially located in the groove, a reinforcing rib is arranged in the groove, and the auxiliary diaphragm is located in the groove.
  • a side of the diaphragm close to the magnetic yoke is collapsed in a direction away from the magnetic yoke to form a stepped portion for avoiding the reinforcing rib, and the stepped portion corresponds to the reinforcing rib along the vibration direction of the diaphragm and interval setting.
  • the auxiliary diaphragm includes a holding part fixed to the basin frame, a ring part and a joint part extending from the holding part into the speaker in sequence, and the joint part is fixed to the voice coil
  • the side of the assembly away from the diaphragm; the folded ring part is an arc-shaped structure that protrudes and extends toward the yoke, and the side of the folded ring part close to the magnetic yoke faces away from the magnetic yoke
  • the directional collapse forms the stepped portion.
  • the step portion includes two, and the two step portions are symmetrically arranged on opposite sides of the voice coil assembly.
  • the voice coil assembly includes a voice coil inserted in the magnetic gap and a voice coil skeleton fixed on the diaphragm and connecting the diaphragm and the voice coil, and the joint portion is fixed on the diaphragm.
  • the voice coil skeleton is disposed at a distance from the voice coil on a side away from the diaphragm.
  • the magnetic circuit system further includes a main magnetic steel fixed on the yoke and a secondary magnetic steel arranged around the main magnetic steel and in the magnetic gap with the main magnetic steel, the secondary magnetic steel
  • the steel includes first auxiliary magnets disposed on opposite sides of the main magnet and second auxiliary magnets disposed on the other opposite sides of the main magnet
  • the voice coil skeleton includes surrounding the main magnet and all the main body part provided with the first auxiliary magnetic steel, the extension part bent and extended from the main body part to the vibrating membrane, and the fixing part fixed on the vibrating membrane, the voice coil is fixed on the main body part
  • the main body portion is provided with a through hole passing through the main body portion at a position corresponding to the second secondary magnetic steel, and the second secondary magnetic steel passes through the main body portion through the through hole.
  • the diaphragm has a cut hole
  • the main magnetic steel is exposed in the cut hole
  • the speaker further includes a cover plate covered on the main magnetic steel, and the diaphragm is close to the main magnetic steel The inner peripheral edge of the cover plate is fixed between the cover plate and the auxiliary magnetic steel.
  • the vibrating membrane includes a first membrane body disposed around the main magnet and enclosing the cut hole, and a second membrane around the first membrane body and spaced from the first membrane body body and a spherical top connecting the first membrane body and the second membrane body, the first membrane body is fixed between the cover plate and the secondary magnet near the inner periphery of the main magnet, The outer peripheral edge of the second membrane body away from the main magnet steel is fixed to the basin frame, and the fixing part is fixed to the dome.
  • the vibration system further includes a flexible circuit board
  • the flexible circuit board includes a first fixing portion fixed to the basin frame, fixed to a side of the voice coil frame away from the vibrating membrane, and connected to the The voice coil is provided with a second fixing part at intervals and a deformation part connecting the first fixing part and the second fixing part.
  • a first pad electrically connected to an external circuit is formed on the first fixing portion
  • a second pad electrically connected to the voice coil is formed on the second fixing portion
  • the voice coil assembly A window for exposing the second pad is opened thereon.
  • the two flexible circuit boards are symmetrically arranged on opposite sides of the voice coil assembly.
  • the speaker of the present invention is provided with a reinforcing rib in the groove to enhance the strength of the magnetic yoke, so that the problem of the magnetic circuit system depression caused by the deformation of the magnetic yoke can be effectively prevented during a fall;
  • the step portion is formed by the side of the auxiliary diaphragm close to the magnetic yoke collapsed in the direction away from the magnetic yoke to avoid the reinforcing rib, so as to prevent the auxiliary diaphragm from interacting with the reinforcing rib during the vibration process. Collision problem.
  • FIG. 1 is an exploded view of a preferred embodiment of the speaker of the present invention.
  • FIG. 2 is a schematic structural diagram of the auxiliary diaphragm in the loudspeaker shown in FIG. 1 .
  • FIG. 3 is a schematic structural diagram of the voice coil assembly in the loudspeaker shown in FIG. 1 .
  • FIG. 4 is a schematic structural diagram of the assembled magnetic circuit system in the speaker shown in FIG. 1 .
  • FIG. 5 is a schematic structural diagram of the partially assembled structure of the speaker shown in FIG. 1 .
  • FIG. 6 is a perspective view of the speaker shown in FIG. 1 after being assembled.
  • FIG. 7 is a cross-sectional view of the speaker shown in FIG. 6 along the direction A-A.
  • FIG. 8 is a cross-sectional view of the speaker shown in FIG. 6 along the B-B direction.
  • FIG. 9 is a cross-sectional view of the speaker shown in FIG. 6 along the C-C direction.
  • the speaker includes a basin frame 1 , a vibration system 3 accommodated in the basin frame 1 , and a magnetic circuit system 5 that drives the vibration system 3 to vibrate and emit sound and has a magnetic gap 5A.
  • the magnetic circuit system 5 includes a magnetic yoke 51 fixed on the basin frame 1 , a main magnetic steel 53 fixed on the magnetic yoke 51 , and a main magnetic steel 53 arranged around the main magnetic steel 53 and connected with the main magnetic steel 53 .
  • the plurality of secondary magnets 55 forming the magnetic gap 5A are spaced apart from each other.
  • the main magnet 53 includes a first magnet 531 and a second magnet 533 spaced along the vibration direction X of the diaphragm 31 to be described later, and a first magnet 531 and a second magnet 533 sandwiched between the first magnet 531 and the main pole core 535 of the second magnet 533 .
  • the secondary magnets 55 include first secondary magnets 55A disposed on opposite sides of the main magnet 53 and second secondary magnets 55B disposed on the other opposite sides of the main magnet 53 .
  • the two first auxiliary magnetic steels 55A are arranged at intervals along the short-axis side of the main magnetic steel 53 (ie, the short-axis side of the speaker), and the two second auxiliary magnetic steels
  • the magnetic steels 55B are arranged at intervals along the long-axis side of the main magnetic steel 53 (ie, the long-axis side of the speaker).
  • the first secondary magnetic steel 55A and the second secondary magnetic steel 55B each include a third magnet 551 and a fourth magnet 553 spaced along the vibration direction X of the diaphragm 31 and sandwiched between the third magnet 551 and the secondary pole core 555 between the fourth magnet 553 .
  • the secondary pole core 555 and the main pole core 535 are located on the same horizontal plane.
  • the magnetic yoke 51 , the main pole core 535 and the secondary pole core 555 are made of magnetically conductive material. Through the magnetic permeability of the magnetic yoke 51 , the main pole core 535 and the secondary pole core 555 , the magnetic flux in the magnetic gap 5A can be effectively increased, thereby improving the sensitivity of the speaker.
  • the first magnet 531 , the second magnet 533 , the third magnet 551 and the fourth magnet 553 are all made of magnetic materials.
  • the structures of the main magnetic steel 53 and the secondary magnetic steel 55 are not limited to this.
  • the secondary magnetic steel 55 may be configured to include only one of the first secondary magnetic steel and the second secondary magnetic steel, or the main magnetic steel 53 and the first secondary magnetic steel 55A
  • the second auxiliary magnetic steel 55B can also be composed of a single magnetic steel as a whole.
  • the vibration system 3 includes a diaphragm 31 fixed on the basin frame 1 , a voice coil assembly 33 fixed on the diaphragm 31 , and an auxiliary diaphragm 35 spaced from the diaphragm 31 .
  • One end of 35 is fixed to the basin frame 1 , and the other end is fixed to the side of the voice coil assembly 33 away from the diaphragm 31 .
  • the voice coil assembly 33 When the voice coil assembly 33 is powered on, the voice coil assembly 33 will vibrate under the action of the magnetic field of the magnetic circuit system 5 , and at the same time, the voice coil assembly 33 will drive the diaphragm 31 to vibrate together.
  • auxiliary diaphragms 35 There are two auxiliary diaphragms 35 , and the two auxiliary diaphragms 35 are symmetrically arranged on opposite sides of the voice coil assembly 33 . Specifically, the two auxiliary diaphragms 35 are arranged at intervals along the longitudinal direction of the speaker. By arranging the auxiliary diaphragm 35 not only the sound-producing performance of the speaker can be improved, but also the swing of the voice coil assembly 33 along the long axis direction can be restricted, and the pure sound effect of the speaker can be improved, especially for a speaker with super large amplitude. more obvious.
  • the diaphragm 31 has a cut hole 31A, and the main magnetic steel 53 is exposed through the cut hole 31A.
  • the speaker further includes a cover plate 7 covered on the main magnet 53, and the diaphragm 31 is close to the center.
  • the inner periphery of the main magnetic steel 53 is fixed between the cover plate 7 and the secondary magnetic steel 55 .
  • the cover plate 7 is covered on the first magnet 531 of the main magnetic steel 53
  • the diaphragm 31 is fixed on the cover plate 7 and the main magnetic steel 53 near the inner periphery of the main magnetic steel 53 . between the third magnets 551 of the secondary magnetic steel 55 .
  • BL value mechanical-electric coupling coefficient
  • connection between the magnetic circuit system 5 and the vibrating membrane 31 can also be configured such that the cover plate is fixed between the inner periphery of the vibrating membrane and the secondary magnetic steel , the main magnet is fixed with the cover plate.
  • the cover plate 31B is made of a magnetic conductive material.
  • the magnetic flux in the magnetic gap 5A can be effectively increased by the magnetic permeability of the cover plate 31B, so that the sensitivity of the speaker can be improved.
  • the vibrating membrane 31 includes a first membrane body 311 arranged around the main magnet 53 and enclosing the incised hole 31A, and a first membrane body 311 around the first membrane body 311 and spaced from the first membrane body 311 .
  • the second membrane body 313 and the dome 315 connecting the first membrane body 311 and the second membrane body 313 , the first membrane body 311 is fixed on the cover plate near the inner periphery of the main magnet 53 7 and the secondary magnetic steel 55 , the outer peripheral edge of the second membrane body 313 away from the main magnetic steel 53 is fixed on the basin frame 1 .
  • the voice coil assembly 33 includes a voice coil 331 inserted in the magnetic gap 5A and a voice coil bobbin 333 fixed to the diaphragm 31 and connected to the diaphragm 31 and the voice coil 331 .
  • the auxiliary One end of the diaphragm 35 is fixed to the side of the voice coil skeleton 333 away from the diaphragm 31 and is spaced from the voice coil 331 .
  • the voice coil bobbin 333 includes a main body portion 335 arranged around the main magnet 53 and the first auxiliary magnetic steel 55A, an extension portion 336 bent and extended from the main body portion 335 toward the diaphragm 31 , and The fixed part 337 of the diaphragm 31 is fixed, the voice coil 331 is fixed to the main body part 335 , and the main body part 335 is provided with a hole passing through the main body part 335 at the position corresponding to the second secondary magnetic steel 55B. Through holes 338 , the second secondary magnetic steel 55B passes through the main body portion 335 through the through holes 338 .
  • the through hole 338 can avoid the second auxiliary magnetic steel 55B, and the vibration system 3 can be restricted due to the restricting effect of the second auxiliary magnetic steel 55B on the main body 335 . Swing along the long and short axis sides of the speaker.
  • the side of the yoke 51 close to the auxiliary diaphragm 35 is away from the
  • the auxiliary diaphragm 35 is recessed to form a groove 511 that avoids the auxiliary diaphragm 35.
  • the orthographic projection of the auxiliary diaphragm 35 on the yoke 51 along the vibration direction of the diaphragm 31 is at least partially located in the groove Inside 511.
  • a reinforcing rib 513 is arranged in the groove 511 , and the side of the auxiliary diaphragm 35 close to the magnetic yoke 51 is collapsed in the direction away from the magnetic yoke 51 to avoid the reinforcing rib
  • the stepped portion 35A of the 513, the stepped portion 35A and the reinforcing rib 513 are arranged along the vibration direction of the diaphragm 31 corresponding to and spaced apart.
  • the stepped portions 35A include two, and the stepped portions 35A of the two auxiliary diaphragms 35 are symmetrically disposed on opposite sides of the voice coil assembly 33 .
  • the auxiliary diaphragm 35 includes a holding portion 351 fixed to the basin frame 1 , a ring portion 353 and a joint portion 355 extending from the holding portion 351 into the speaker in sequence.
  • the joint portion 355 is fixed to the side of the voice coil assembly 33 away from the diaphragm 31 .
  • the coupling portion 355 is fixed to a side of the voice coil bobbin 333 away from the diaphragm 31 and is spaced from the voice coil 331 .
  • the coupling portion 355 is fixed to the side of the main body portion 335 away from the fixing portion 337 .
  • the folded ring portion 353 is an arc-shaped structure that protrudes and extends toward the magnetic yoke 51 .
  • the side of the ring portion 353 close to the magnetic yoke 51 is collapsed in a direction away from the magnetic yoke 51 to form the stepped portion 35A.
  • the vibration system further includes flexible circuit boards 37 , two flexible circuit boards 37 are provided, and the two flexible circuit boards 37 are symmetrically arranged on opposite sides of the voice coil assembly 33 .
  • the flexible circuit board 37 includes a first fixing portion 371 fixed to the basin frame 1 , a second fixing portion 373 fixed to the side of the voice coil assembly 33 away from the diaphragm 51 , and connecting the first fixing portion 373 .
  • the second fixing part is arranged at intervals from the voice coil.
  • both the first fixing part 371 and the holding part 351 are fixed to the surface of the clamping plate 8 facing the yoke 51 (that is, the first fixing part 371 and the holding part 351 )
  • the second fixing part 373 is directly fixed on the main body part 335
  • the connecting part 355 is fixed on the second fixing part 373 away from the main body part 335 . (that is, the coupling portion 355 is fixed on the main body portion 335 through the second fixing portion 373 ).
  • the splint 8 is provided with an escape port 81 for avoiding the deformation part 375 ; between the second fixing part 373 and the main body part 335 and between the connecting part 355 and the second fixing part 373 are usually adopted Fixed by gluing.
  • a first pad 37A electrically connected to an external circuit is formed on the first fixing portion 371
  • a second pad 37B that is electrically connected to the voice coil 331 is formed on the second fixing portion 373 .
  • the first pad 37A is located on the side of the first fixing portion 371 away from the clamping plate 8 , so as to facilitate the electrical connection between the first pad 37A and the external circuit;
  • the two bonding pads 37B are located on the side of the second fixing portion 373 facing the main body portion 335 .
  • the main body portion 335 is provided with a window 339 for exposing the second pad 37B (that is, the voice coil assembly 33 is provided with a window 339 to expose all the the exposed window 339 of the second pad 37B).
  • only one of the flexible circuit boards 37 is electrically connected to the voice coil 331 . This can reduce the welding and sealing process. Further preferably, when only one of the flexible circuit boards 37 is electrically connected to the voice coil 331, the other flexible circuit board can also be replaced by the base material of the flexible circuit board or made of other materials. A non-conductive board is formed, which can reduce the cost of using the circuit board.
  • the orthographic projection of the second fixing portion 373 and the deforming portion 375 on the magnetic yoke 51 is located in the groove 511 . This can effectively avoid the risk of the second fixing portion 373 and the deforming portion 375 colliding with the magnetic yoke 51 during the vibration of the speaker.
  • the reinforcement rib 513 is arranged in the groove 511 to enhance the strength of the magnetic yoke 51, so that the magnetic circuit system caused by the deformation of the magnetic yoke can be effectively prevented from appearing in the fall.
  • the step portion 35A is formed by the side of the auxiliary diaphragm 35 close to the magnetic yoke 51 being collapsed in the direction away from the magnetic yoke 51 to avoid the reinforcing rib 513 , so that the auxiliary diaphragm 35 can be avoided.

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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)

Abstract

La présente invention concerne un haut-parleur, comprenant un panier, un système de vibration et un système de circuit magnétique. Le système de vibration comprend une membrane fixée au panier, un ensemble de bobine acoustique fixé à la membrane, et une membrane auxiliaire espacée de la membrane ; une extrémité de la membrane auxiliaire est fixée au panier, et son autre extrémité est fixée à un côté de l'ensemble de bobine acoustique distant de la membrane ; le système de circuit magnétique comprend une culasse fixée au panier ; un côté de la culasse proche de la membrane auxiliaire est évidé vers un côté distant de la membrane auxiliaire pour former un évidement ; une projection orthographique de la membrane auxiliaire sur la culasse le long d'une direction de vibration de la membrane est au moins partiellement située dans l'évidement ; des nervures de renforcement sont prévues dans l'évidement ; un côté de la membrane auxiliaire proche de la culasse s'affaisse vers une direction opposée à la culasse pour former des parties de gradin destinées à recevoir les nervures de renforcement ; les parties de gradin et les nervures de renforcement correspondent les unes aux autres le long de la direction de vibration de la membrane et sont disposées à intervalles. Le haut-parleur de la présente invention peut résoudre efficacement le problème de dépression du système de circuit magnétique causé par la déformation de l'étrier pendant une chute.
PCT/CN2020/104495 2020-07-10 2020-07-24 Haut-parleur WO2022007020A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202021362303.5U CN212588508U (zh) 2020-07-10 2020-07-10 扬声器
CN202021362303.5 2020-07-10

Publications (1)

Publication Number Publication Date
WO2022007020A1 true WO2022007020A1 (fr) 2022-01-13

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Application Number Title Priority Date Filing Date
PCT/CN2020/104495 WO2022007020A1 (fr) 2020-07-10 2020-07-24 Haut-parleur

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CN (1) CN212588508U (fr)
WO (1) WO2022007020A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114679674A (zh) * 2022-03-29 2022-06-28 维沃移动通信有限公司 扬声器及电子设备
CN115334418A (zh) * 2022-08-12 2022-11-11 江西融贤声学科技有限公司 低失真折环扬声器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN217721471U (zh) 2022-07-01 2022-11-01 瑞声光电科技(常州)有限公司 扬声器单体

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6526151B1 (en) * 2000-06-29 2003-02-25 Meiloon Industrial Co., Ltd. High stability loudspeaker
CN109889963A (zh) * 2018-12-27 2019-06-14 瑞声科技(新加坡)有限公司 发声器件
CN110166902A (zh) * 2019-05-09 2019-08-23 瑞声光电科技(常州)有限公司 发声器件
CN209897255U (zh) * 2019-04-04 2020-01-03 瑞声科技(新加坡)有限公司 电声器件

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6526151B1 (en) * 2000-06-29 2003-02-25 Meiloon Industrial Co., Ltd. High stability loudspeaker
CN109889963A (zh) * 2018-12-27 2019-06-14 瑞声科技(新加坡)有限公司 发声器件
CN209897255U (zh) * 2019-04-04 2020-01-03 瑞声科技(新加坡)有限公司 电声器件
CN110166902A (zh) * 2019-05-09 2019-08-23 瑞声光电科技(常州)有限公司 发声器件

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114679674A (zh) * 2022-03-29 2022-06-28 维沃移动通信有限公司 扬声器及电子设备
CN115334418A (zh) * 2022-08-12 2022-11-11 江西融贤声学科技有限公司 低失真折环扬声器

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