WO2022110457A1

WO2022110457A1 - Sound production device

Info

Publication number: WO2022110457A1
Application number: PCT/CN2020/140066
Authority: WO
Inventors: 张龙; 杨虎虎
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: 2020-11-30
Filing date: 2020-12-28
Publication date: 2022-06-02
Also published as: CN213661921U

Abstract

The present invention provides a sound production device. The sound production device comprises a basket, a vibration system and a magnetic circuit system having a magnetic gap, the vibration system and the magnetic circuit system being separately fixed to the basket. The vibration system comprises a vibrating diaphragm fixed to the basket and a voice coil inserted in the magnetic gap and for driving the vibrating diaphragm to vibrate, thereby producing a sound. The vibrating diaphragm protrudes towards the magnetic circuit system to form a voice coil fixing part, and the voice coil is fixed to the side of the voice coil fixing part facing the magnetic circuit system. The sound production device provided by the present invention not only eliminates the risk of poor bonding between the frame and the vibrating diaphragm, but also reduces assembling processes.

Description

sound device

technical field

The invention relates to the field of electro-acoustic conversion, in particular to a sound-generating device.

Background technique

In order to adapt to the miniaturization and multi-function development of various audio equipment and information communication equipment, it is required that the sound-emitting devices used in such equipment tend to be more miniaturized, so that the cooperation between the sound-emitting device and other surrounding components is more compact. In particular, with the development of thin and light mobile phones, the quality requirements for the sound-emitting devices used in them are getting higher and higher.

In the related art, the sound-generating device includes a basin frame, a vibration system respectively fixed to the basin frame and a magnetic circuit system with a magnetic gap. The coil and the skeleton connecting the diaphragm and the voice coil. However, this sounding device is prone to the problem that the skeleton and the diaphragm are not firmly bonded.

Therefore, it is necessary to provide a new sounding device to solve the above problems.

technical problem

The purpose of the present invention is to provide a sounding device, which not only eliminates the risk of poor bonding between the skeleton and the diaphragm, but also reduces the assembly process.

technical solutions

The sound-generating device provided by the present invention includes a basin frame, a vibration system respectively fixed to the basin frame and a magnetic circuit system having a magnetic gap, and the vibration system includes a diaphragm fixed to the basin frame and a magnetic circuit system inserted into the basin frame. A voice coil with a gap to drive the diaphragm to vibrate and produce sound, characterized in that: the diaphragm protrudes toward the magnetic circuit system to form a voice coil fixing part, and the voice coil is fixed on the voice coil fixing part and faces the direction of the voice coil fixing part. the side of the magnetic circuit system.

Preferably, the voice coil includes a voice coil body inserted into the magnetic gap and fixed to the voice coil fixing part and a lead wire extending from the voice coil body, and the voice coil fixing part is formed with a Gap for lead traces.

Preferably, the voice coil fixing part includes a first voice coil fixing part and a second voice coil fixing part, and along the vibration direction of the diaphragm, the first voice coil fixing part is opposite to the second voice coil fixing part closer to the magnetic circuit system, the voice coil is fixed on the side of the first voice coil fixing part facing the magnetic circuit system, and the first voice coil fixing part and the second voice coil fixing part The gap is formed by enclosing.

Preferably, the diaphragm includes a diaphragm body and a dome, the outer periphery of the diaphragm body is fixed to the basin frame, the dome is fixed to the diaphragm body, and the voice coil fixing part is fixed from the dome The protrusion is formed in the direction of the magnetic circuit system.

Preferably, the membrane body has a cut hole covered by the dome, the voice coil fixing part divides the dome into an edge part and a center part spaced from the edge part, and the edge part is fixed on the inner periphery of the membrane body.

Preferably, the dome is a metal plate, and the voice coil fixing portion is stamped and formed by the dome.

Preferably, the vibrating membrane includes a membrane body and a dome, the outer periphery of the membrane body is fixed to the basin frame, the dome is fixed to the membrane body, and the voice coil fixing portion is fixed from the membrane body The protrusion is formed in the direction of the magnetic circuit system.

Preferably, the voice coil fixing portion is stamped and formed by the membrane body.

Preferably, the magnetic circuit system includes a magnetic yoke fixed on the basin frame, a main magnetic steel fixed on the magnetic yoke, and a secondary magnetic steel arranged spaced apart from the main magnetic steel to form the magnetic gap, The secondary magnetic steel includes two first secondary magnetic steels and two second secondary magnetic steels, and the two first secondary magnetic steels are respectively arranged on opposite sides of the long axis direction of the main magnetic steel. The second secondary magnets are respectively disposed on opposite sides of the main magnet in the short axis direction.

Preferably, an elastic support member is arranged between the first auxiliary magnet steel and the second auxiliary magnet steel, one end of the elastic support member is fixed to the basin frame, and the other end of the elastic support member is fixed to the voice coil away from the one side of the diaphragm.

Preferably, the elastic support member includes a flexible circuit board and an auxiliary diaphragm, the flexible circuit board includes a holding portion fixed to the basin frame, a fixing portion fixed to the side of the voice coil away from the diaphragm, and The elastic arm connecting the holding part and the fixing part, the auxiliary diaphragm includes a first part fixed on the side of the holding part away from the basin frame, a first part fixed on the fixing part away from the voice coil A second part of the side and a folded ring connecting the first part and the second part, the folded ring protruding in a direction away from the flexible circuit board.

beneficial effect

Compared with the related art, the sound-generating device provided by the present invention forms a voice coil fixing part by protruding the vibrating film toward the magnetic circuit system, and the voice coil is fixed on the side of the voice coil fixing part facing the magnetic circuit system, so that the The voice coil is directly connected to the diaphragm, thereby eliminating the risk of poor bonding between the skeleton and the diaphragm, and reducing the assembly process of the sound-emitting device.

Description of drawings

FIG. 1 is an exploded view of the sound-emitting device provided by the present invention.

FIG. 2 is a perspective view of the dome of the sounding device shown in FIG. 1 .

FIG. 3 is a schematic structural diagram of the partially assembled structure of the sound-emitting device shown in FIG. 1 .

FIG. 4 is a perspective view of the sounding device shown in FIG. 1 after being assembled.

FIG. 5 is a cross-sectional view of the sound-emitting device shown in FIG. 4 along the line A-A.

FIG. 6 is a cross-sectional view of the sound-emitting device shown in FIG. 4 taken along line B-B.

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. . Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIG. 1 to FIG. 6 , the sound-generating device includes a basin frame 1 , a vibration system 3 respectively fixed to the basin frame 1 , and a magnetic circuit system 5 having a magnetic gap 5A. The magnetic circuit system 5 is used for driving The vibration system 3 vibrates and emits sound.

The vibrating system 3 includes a vibrating membrane 31 and a voice coil 33 fixed to the vibrating membrane 31 and inserted into the magnetic gap 5A to drive the vibrating membrane 31 to vibrate and produce sound. The vibrating membrane 31 is fixed to the basin frame 1 So that the vibration system 3 is fixed to the basin frame 1 . The voice coil 33 is electrically connected to an external circuit. After the voice coil 33 is energized, the voice coil 33 vibrates under the action of the magnetic field of the magnetic circuit system 5. At the same time, the voice coil 33 drives the The diaphragm 31 vibrates to produce sound.

The diaphragm 31 includes a diaphragm body 35 and a dome 37 . The outer periphery of the diaphragm body 35 is fixed to the basin frame 1 , and the dome 37 is fixed to the diaphragm body 35 . A voice coil fixing portion 39 is formed protruding in the direction of the magnetic circuit system 5 , and the voice coil 33 is fixed on the side of the voice coil fixing portion 39 facing the magnetic circuit system 5 .

Wherein, the dome 37 and the voice coil fixing portion 39 thereon can be made of polymers, ceramics, metals and other materials through a molding process. When the dome 37 is a metal material, the dome 37 The voice coil fixing portion 39 on it can also be stamped and formed from a metal plate. In this embodiment, preferably, the dome 37 is a metal plate, and the voice coil fixing portion 39 is stamped and formed by the dome 37 . By stamping and forming, the influence of the original skeleton on the quality of the diaphragm can be reduced.

In this embodiment, the membrane body 35 has a cut hole 351 covered by the dome 37 , and the voice coil fixing portion 39 divides the dome 37 into an edge portion 371 and is spaced from the edge portion 371 The central portion 373 is provided, and the edge portion 371 is fixed to the inner periphery of the membrane body 35 .

In this embodiment, the edge portion 371 is located on the side of the membrane body 35 facing the magnetic circuit system 5 . Setting the edge portion 371 to be fixed on the side of the membrane body 35 facing the magnetic circuit system 5 is beneficial to reduce the height of the sound-emitting device along the vibration direction.

It can be understood that, in other embodiments, the edge portion 371 may also be set to be fixed on the side of the membrane body 35 away from the magnetic circuit system 5 , or the membrane body 35 may not be provided with any Correspondingly, the dome is fixed to the side of the membrane body facing the magnetic circuit system 5 , so that the voice coil fixing part can be fixed to the voice coil.

It can also be understood that, in other embodiments, the membrane body is not provided with a cut hole, the dome is fixed on the side of the membrane body away from the magnetic circuit system, and the voice coil fixing part is The film body is formed to protrude toward the direction of the magnetic circuit system. Further, the voice coil fixing portion may be configured to be stamped and formed by the membrane body.

The voice coil 33 includes a voice coil body 331 inserted into the magnetic gap 5A and fixed to the voice coil fixing portion 39 , and a lead wire 333 extending from the voice coil body 331 , and the voice coil fixing portion 39 is formed on the voice coil body 331 . There are notches 39A for the leads 333 to be routed. The setting of the notch 39A enables the voice coil 33 to be fixed to the voice coil fixing portion 39 , there is a channel for the lead wire 333 between the voice coil body 331 and the voice coil fixing portion 39 , so The voice coil 33 is electrically connected to an external circuit through the lead wire 333 . This arrangement eliminates the risk of reducing the strength of the skeleton caused by the hole for the lead wire in the related art, and at the same time, the gap 39A is also beneficial to balance the air pressure in the sound-emitting device.

In this embodiment, the voice coil fixing portion 39 has an annular structure.

The voice coil fixing part 39 includes a first voice coil fixing part 391 and a second voice coil fixing part 393. Along the vibration direction of the diaphragm 1, the first voice coil fixing part 391 is opposite to the second voice coil The fixing part 393 is closer to the magnetic circuit system 5 , the voice coil 3 is fixed on the side of the first voice coil fixing part 391 facing the magnetic circuit system 5 , and the first voice coil fixing part 391 is connected to the magnetic circuit system 5 . The second voice coil fixing portion 393 encloses the opening 39A.

It can be understood that, in other embodiments, the voice coil fixing portion can also be configured to be formed only by the first voice coil fixing portion, and correspondingly, the notch is formed by the first voice coil fixing portion and the dome enclosure. Alternatively, the voice coil fixing part is configured to include a plurality of voice coil fixing part islands arranged at intervals, and the plurality of the voice coil fixing part islands are distributed in a ring structure, wherein two adjacent separation islands and a dome The gap is formed by enclosing.

The magnetic circuit system 5 includes a magnetic yoke 51 , a main magnetic steel 53 , a secondary magnetic steel 55 , a main pole core 57 and a secondary pole core 58 , and the main magnetic steel 53 and the auxiliary magnetic steel 55 are fixed to the magnetic yoke 51 , and the main magnetic steel 53 and the secondary magnetic steel 55 are spaced apart to form the magnetic gap 5A, and the main pole core 57 is stacked on a side of the main magnetic steel 53 away from the yoke 51 . side, the secondary pole core 58 is stacked on the side of the secondary magnetic steel 55 away from the yoke 51 , and the main pole core 57 is located in the through hole of the secondary pole core 58 and is connected to the main pole core 58 . The pole core 57 is located on the same horizontal plane, and the magnetic yoke 51 and the secondary pole core 58 are fixed on the basin frame 1 to realize that the magnetic circuit system 5 is fixed on the basin frame 1 .

Wherein, the main pole core 57 and the secondary pole core 58 are made of magnetically conductive material, so that the magnetic flux in the magnetic gap 5A can be enhanced.

The main magnetic steel 53 has a rectangular structure, the auxiliary magnetic steel 55 includes two first auxiliary magnetic steels 551 and two second auxiliary magnetic steels 553 , and the two first auxiliary magnetic steels 551 are respectively arranged in the On opposite sides of the main magnetic steel 53 in the long axis direction, the two second auxiliary magnetic steels 553 are respectively disposed on opposite sides in the short axis direction of the main magnetic steel 53 .

Between the first secondary magnetic steel 551 and the second secondary magnetic steel 553 there are elastic supports 7 (that is, there are four elastic supports 7), and one end of the elastic supports 7 is fixed to the The other end of the basin frame 1 is fixed to the side of the voice coil 33 away from the diaphragm 31 . Wherein, the supporting effect of the elastic support member 7 on the voice coil 33 can limit the swing of the voice coil 33 along the direction of its long axis, and improve the pure sound effect of the sounding device.

The elastic support 7 includes a flexible circuit board 71 and an auxiliary diaphragm 73 .

The flexible circuit board 71 includes a holding part 711 fixed to the basin frame 1 , a fixed part 713 fixed to the side of the voice coil 33 away from the diaphragm 1 , and connecting the holding part 711 and the fixed part Spring arm 715 of 713. On the one hand, the flexible circuit board 71 plays the role of supporting and fixing the voice coil 33; shown), the elastic arm 715 is provided with a conductive path to electrically connect the holding portion 711 and the pads on the fixing portion 713, wherein the pads on the fixing portion 713 and the voice coil 33 The lead 333 is connected to electrically connect the voice coil 33, and the pad on the holding portion 711 is connected to an external circuit, so that the voice coil 33 is electrically connected to the external circuit through the flexible circuit board 71. When the sound generating device is connected, the electrical signal of the external circuit is transmitted to the voice coil 33 through the flexible circuit board 71 .

The auxiliary diaphragm 73 includes a first portion 731 fixed on the side of the holding portion 711 away from the basin frame 1 , a second portion 733 fixed on the side of the fixing portion 713 away from the voice coil 33 , and a connecting portion 733 . The folded rings 735 of the first part 731 and the second part 733 protrude in a direction away from the flexible circuit board 71 .

In the sound-generating device provided by the present invention, a voice coil fixing part is formed by protruding the diaphragm toward the magnetic circuit system, and the voice coil is fixed on the side of the voice coil fixing part facing the magnetic circuit system, so that the voice coil is directly connected to the vibration coil. The membrane is connected, thereby eliminating the risk of poor bonding between the frame and the diaphragm, and reducing the assembly process of the sound-emitting device.

The above are only the embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these belong to the present invention. scope of protection.

Claims

A sounding device includes a basin frame, a vibration system and a magnetic circuit system with a magnetic gap respectively fixed to the basin frame, the vibration system comprising a vibrating membrane fixed to the basin frame and inserted into the magnetic gap to The voice coil for driving the diaphragm to vibrate and produce sound is characterized in that: the diaphragm protrudes toward the magnetic circuit system to form a voice coil fixing part, and the voice coil is fixed on the voice coil fixing part and faces the magnetic side of the road system.
The sound-generating device according to claim 1, wherein the voice coil comprises a voice coil body inserted into the magnetic gap and fixed to the voice coil fixing part and a lead wire extending from the voice coil body, so A notch for the lead wire is formed on the voice coil fixing part.
The sound-generating device according to claim 2, wherein the voice coil fixing part comprises a first voice coil fixing part and a second voice coil fixing part, and along the vibration direction of the diaphragm, the first voice coil The fixing part is closer to the magnetic circuit system than the second voice coil fixing part, the voice coil is fixed on the side of the first voice coil fixing part facing the magnetic circuit system, and the first voice coil The fixing part and the second voice coil fixing part are enclosed to form the notch.
The sound-generating device according to any one of claims 1-3, wherein the vibrating membrane comprises a membrane body and a dome, the outer periphery of the membrane body is fixed to the basin frame, and the dome is fixed In the membrane body, the voice coil fixing portion is formed protruding from the dome toward the magnetic circuit system.
The sound-generating device according to claim 4, wherein the membrane body has a cut hole covered by the dome, and the voice coil fixing portion divides the dome into an edge portion and a connection with the edge portion. The center portion is arranged at intervals, and the edge portion is fixed to the inner peripheral edge of the film body.
The sound-emitting device according to claim 4, wherein the dome is a metal plate, and the voice coil fixing portion is stamped and formed by the dome.
The sound-generating device according to any one of claims 1-3, wherein the vibrating membrane comprises a membrane body and a dome, the outer periphery of the membrane body is fixed to the basin frame, and the dome is fixed In the membrane body, the voice coil fixing portion is formed protruding from the membrane body in the direction of the magnetic circuit system.
The sound-generating device according to claim 7, wherein the voice coil fixing portion is stamped and formed by the membrane body.
The sound-generating device according to claim 1, wherein the magnetic circuit system comprises a magnetic yoke fixed on the basin frame, a main magnetic steel fixed on the magnetic yoke and spaced from the main magnetic steel To form the secondary magnetic steel of the magnetic gap, the secondary magnetic steel includes two first secondary magnetic steels and two second secondary magnetic steels, and the two first secondary magnetic steels are respectively arranged on the main magnetic steel On the opposite sides of the long axis direction of the main magnetic steel, the two second auxiliary magnetic steels are respectively arranged on the opposite sides of the short axis direction of the main magnetic steel.
The sound-generating device according to claim 9, wherein an elastic support is provided between the first auxiliary magnet and the second auxiliary magnet, and one end of the elastic support is fixed to the basin frame , the other end of which is fixed on the side of the voice coil away from the diaphragm.
The sound-generating device according to claim 10, wherein the elastic support member comprises a flexible circuit board and an auxiliary diaphragm, and the flexible circuit board comprises a holding part fixed to the basin frame and fixed to the voice coil The fixing part on the side away from the diaphragm and the elastic arm connecting the holding part and the fixing part, the auxiliary diaphragm includes a first part fixed on the side of the holding part away from the basin frame, a fixed part A second part on the side of the fixing part away from the voice coil and a fold ring connecting the first part and the second part, the fold ring protrudes in a direction away from the flexible circuit board.