CN211959525U

CN211959525U - Miniature acoustic generator

Info

Publication number: CN211959525U
Application number: CN202020649388.9U
Authority: CN
Inventors: 肖波; 令狐荣林
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2020-11-17
Anticipated expiration: 2030-04-24
Also published as: WO2021212539A1

Abstract

The utility model provides a miniature sounder, including vibration system and magnetic circuit, vibration system include vibrating diaphragm, voice coil loudspeaker voice coil and combine in vibrating diaphragm one side is used for connecting the vibrating diaphragm with the skeleton subassembly of voice coil loudspeaker voice coil, by the first plane that voice coil loudspeaker voice coil major axis limit and minor axis limit constitute with vibrating diaphragm place plane mutually perpendicular, the skeleton subassembly includes two edges the skeleton that the relative interval of voice coil loudspeaker voice coil major axis limit direction set up, the skeleton includes the edge that is used for centre gripping that voice coil loudspeaker voice coil major axis limit direction interval set up first joint portion and the second joint portion and the connection on voice coil loudspeaker voice coil minor axis limit first joint portion with the first main part of second joint portion, first main part with being close to of vibrating diaphragm first side wall side is connected. The first magnet assembly and the second magnet assembly of the magnetic circuit system are respectively arranged on two sides of the plane where the voice coil is located. Through the mode, the situation that the voice coil shakes during reciprocating motion can be avoided.

Description

Miniature acoustic generator

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electroacoustic conversion field, concretely relates to miniature vocal ware.

[ background of the invention ]

In the existing miniature acoustic generator, the vibration system comprises a voice coil, a vibrating diaphragm and a framework combined on one side of the vibrating diaphragm and used for connecting the vibrating diaphragm and the voice coil, and the magnetic circuit system comprises two magnet assemblies respectively arranged on two sides of a plane where the voice coil is located. The voice coil loudspeaker voice coil is the platykurtic, skeleton one end relies on the vibrating diaphragm, the other end and platykurtic the voice coil loudspeaker voice coil is connected in order to incite somebody to action the voice coil loudspeaker voice coil suspension is in two between the magnet subassembly. Because the voice coil is heavy, when the voice coil reciprocates between the two magnet assemblies, the voice coil is easy to shake and rub against the magnet assemblies, so that the magnet assemblies or the voice coil are damaged, the tone quality is reduced, and the reliability of a product is reduced.

Therefore, there is a need to provide a new bobbin structure to solve the problem that the voice coil is easy to shake when moving back and forth between the two magnet assemblies.

[ Utility model ] content

An object of the utility model is to provide a miniature vocal ware, skeleton includes the first joint portion and the second joint portion that are used for centre gripping voice coil loudspeaker voice coil minor axis limit that set up along voice coil loudspeaker voice coil major axis limit direction interval among the miniature vocal ware, through setting up the common centre gripping voice coil loudspeaker voice coil minor axis limit of first joint portion and second joint portion to solve the voice coil loudspeaker voice coil two produce the problem of rocking easily during the back and forth movement between the magnet subassembly.

The technical scheme of the utility model as follows: provides a miniature acoustic generator, which comprises a shell with a containing space, a vibration system and a magnetic circuit system contained in the containing space, wherein the shell comprises a first side wall and a second side wall bent and extended from the edge of the first side wall,

the vibration system comprises a vibrating diaphragm, a voice coil and a framework component combined on one side of the vibrating diaphragm and used for connecting the vibrating diaphragm and the voice coil, wherein the outer edge of the vibrating diaphragm is fixedly arranged on the end of the first side wall far away from the second side wall, a first plane formed by a long axis edge and a short axis edge of the voice coil is perpendicular to the plane where the vibrating diaphragm is located, the framework component comprises two frameworks which are arranged at intervals along the long axis edge direction of the voice coil, the frameworks comprise a first joint part and a second joint part which are arranged at intervals along the long axis edge direction of the voice coil and used for clamping the short axis edge of the voice coil, and a first main body part which is connected with the first joint part and the second joint part, and the first main body part is connected with the vibrating diaphragm close to the first side wall,

the magnetic circuit system comprises a first magnet assembly and a second magnet assembly which are arranged at intervals along the direction vertical to the first plane, and the voice coil is arranged between the first magnet assembly and the second magnet assembly.

Preferably, the first engaging portion is connected to an outer peripheral edge of the voice coil, and the second engaging portion is connected to an inner peripheral edge of the voice coil.

Preferably, the first body portion is attached to the voice coil.

Preferably, the frame further includes a third joint portion bent and extended from an edge of the first main body portion, and the third joint portion is fixedly disposed on an inner edge of the diaphragm, the inner edge being close to the first sidewall.

Preferably, a dome is attached to the side, away from the first side wall, of the inner edge of the diaphragm.

Preferably, the miniature sounder further comprises two flexible circuit boards arranged at intervals in the direction of the long axis of the voice coil, each flexible circuit board comprises a second main body part connected with the voice coil, an elastic connecting part connected with one end of the second main body part and a fixing part connected with the elastic connecting part, the fixing parts are fixedly arranged on the first side wall, the other end of the second main body part is located on the same side as the framework, and the other end of the second main body part is close to the first side wall.

Preferably, the magnetic circuit system further includes a first clamping plate and a second clamping plate disposed at intervals along the short axis direction of the voice coil, the first magnet assembly and the second magnet assembly are disposed between the first clamping plate and the second clamping plate, the first clamping plate is fixedly disposed on the first sidewall, a joint ring is sandwiched between the second clamping plate and the diaphragm, and the joint ring is accommodated in the accommodating space and is fixedly disposed on the second sidewall.

Preferably, the first side wall is provided with a first assembling port and second assembling ports symmetrically arranged on two sides of the first assembling port, the first clamping plate is embedded in the first assembling port, and the fixing parts are respectively embedded in the corresponding second assembling ports.

Preferably, the first magnet assembly and the second magnet assembly are composed of five elements with magnetic conduction functions, and the five elements with magnetic conduction functions comprise three pieces of first magnetic steel arranged along the short axis direction of the voice coil at intervals and pole cores arranged between the adjacent first magnetic steels respectively or are arranged between the adjacent second magnetic steels respectively.

The beneficial effects of the utility model reside in that: the utility model discloses an among the miniature sounder, vibration system include vibrating diaphragm, voice coil loudspeaker voice coil and combine in vibrating diaphragm one side is used for connecting the vibrating diaphragm with the skeleton subassembly of voice coil loudspeaker voice coil, the skeleton subassembly includes two edges the skeleton that voice coil loudspeaker voice coil major axis limit direction relative separation set up, the skeleton includes the edge that is used for of voice coil loudspeaker voice coil major axis limit direction interval setting the first joint portion and the second joint portion and the connection on voice coil loudspeaker voice coil minor axis limit first joint portion with the first main part of second joint portion, first main part with being close to of vibrating diaphragm first side wall side is connected. The short shaft side of the voice coil is clamped by the first joint part and the second joint part, so that the voice coil can be prevented from shaking during reciprocating motion, and the motion stability of the vibration system is improved.

[ description of the drawings ]

Fig. 1 is a schematic view of the overall structure of a miniature acoustic generator according to an embodiment of the present invention;

fig. 2 is an exploded schematic view of a miniature acoustic generator according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view taken along the line A-A in FIG. 1;

FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 1;

FIG. 5 is a schematic cross-sectional view taken along the line C-C in FIG. 1;

fig. 6 is a schematic view of a partial structure of a miniature acoustic generator according to an embodiment of the present invention;

reference numerals: a miniature acoustic generator 100; a housing 1; a housing space 10; a first side wall 11; the first fitting opening 111; a second fitting opening 112; a second side wall 12; an engaging ring 13; a vibration system 2; a voice coil 21; a diaphragm 22; an intermediate portion 221; the boss 222; a holding portion 223; a skeleton assembly 23; a skeleton 231; the first engaging portion 231 a; the second engaging portion 231 b; a first body portion 231 c; the third engaging portion 231 d; a dome 24; a magnetic circuit system 3; a first magnet assembly 31; a first magnetic steel 311; pole piece & second magnet 312; a second magnet assembly 32; a first clamping plate 33; a second clamping plate 34; a flexible circuit board 4; a second body portion 41; the elastic connection portion 42; and a fixed portion 43.

[ detailed description ] embodiments

The present invention will be further described with reference to the accompanying drawings and embodiments.

Referring to fig. 1-6, an embodiment of the present invention provides a miniature sound generator 100, which includes a housing 1 having an accommodating space 10, a vibration system 2, and a magnetic circuit system 3 accommodated in the accommodating space 10. The housing 1 includes a first sidewall 11 and a second sidewall 12 extending from the first sidewall 11. The first side wall 11 and the second side wall 12 enclose the accommodating space 10.

Specifically, the vibration system 2 includes a diaphragm 22, a voice coil 21, and a bobbin assembly 23 coupled to one side of the diaphragm 22 for connecting the diaphragm 22 and the voice coil 21. The outer edge of the diaphragm 22 is fixed to the end of the second sidewall 12 away from the first sidewall 11, and a first plane (such as an XY plane shown in fig. 4) formed by the long axis side and the short axis side of the voice coil 21 is perpendicular to the plane of the diaphragm 22. The magnetic circuit system 3 includes a first magnet assembly 31 and a second magnet assembly 32 spaced apart in a direction perpendicular to the first plane, and the voice coil 21 is disposed between the first magnet assembly 31 and the second magnet assembly 32.

Further, the bobbin assembly 23 includes two bobbins 231 disposed at intervals along a long axis side direction (X direction as shown in fig. 4) of the voice coil 21, the bobbins 231 include first and second

engaging portions

231a and 231b disposed at intervals along the long axis side direction of the voice coil 21 for clamping a short axis side of the voice coil 21, and a first body portion 231c connecting the first and second

engaging portions

231a and 231b, and the first body portion 231c is connected to the side of the diaphragm 22 close to the first sidewall 11. The first joint 231a and the second joint 231b clamp the short shaft side of the voice coil 21 together, and the voice coil 21 is suspended between the first magnet assembly 31 and the second magnet assembly 32, so that the voice coil 21 can be prevented from shaking during reciprocating motion, and the motion stability of the vibration system 2 can be improved.

In addition, the miniature sound generator 100 provided by the present embodiment can effectively save the space required in the thickness direction (the Z direction as shown in fig. 3 and 5), so that the volume requirement on the rear cavity of the mobile phone can be effectively reduced under the same low sound output condition. Meanwhile, the miniature acoustic generator 100 provided by the embodiment can also achieve the ultra-large low-frequency amplitude Xmax larger than 1.0mm, improve the driving force (Bli) of the acoustic generator product, and realize the ultra-strong bass performance under the condition of lower power consumption.

Specifically, the first engaging portion 231a is connected to the outer periphery of the voice coil 21, and the second engaging portion 231b is connected to the inner periphery of the voice coil 21, as shown in fig. 4, so that the voice coil 21 can be prevented from wobbling during the reciprocating movement. The length of the second engagement portion 231b is designed according to the length of the short side of the inner circumference of the voice coil 21. The length of the first joint 231a is not limited to that shown in this embodiment, one end of the first joint is connected to the outer periphery of the voice coil 21, and the other end extends to the side of the diaphragm close to the first sidewall 11, and the first joint 231a with other lengths also belongs to the protection scope of the present invention.

Alternatively, the first engaging portion 231a is perpendicular to the first body portion 231c, and the second engaging portion 231b is perpendicular to the first body portion 231 c.

Optionally, the first body portion 231c is attached to the voice coil 21 to provide more support points for the voice coil 21, so as to further improve the motion stability of the voice coil 21.

Optionally, the frame 231 further includes a third joint portion 231d bent and extended from the edge of the first body portion 231c, and the third joint portion 231d is fixedly disposed on the inner edge of the diaphragm 22 near the first sidewall 11 side.

Alternatively, the third engaging portion 231d and the first body portion 231c are perpendicular to each other.

Specifically, a dome 24 is attached to the inner edge of the diaphragm 22 on the side away from the first sidewall 11.

Specifically, the magnetic circuit system 3 further includes a first clamping plate 33 and a second clamping plate 34 that are spaced apart from each other along a short-axis side direction (an X direction shown in fig. 3-5) of the voice coil 21, the first magnet assembly 31 and the second magnet assembly 32 are disposed between the first clamping plate 33 and the second clamping plate 34, the first clamping plate 33 is fixedly disposed on the first sidewall 11, a joint ring 13 is interposed between the second clamping plate 34 and the diaphragm 22, and the joint ring 13 is accommodated in the accommodating space 10 and is fixedly disposed on the second sidewall 12.

Optionally, the diaphragm 22 includes a middle portion 221, a raised portion 222 disposed around an outer edge of the middle portion 221, and a holding portion 223 extending outward from an outer edge of the raised portion 222, where the raised portion 222 is raised in a direction away from the second sidewall 12. The holding portion 223 is fixedly disposed on the end of the second sidewall 12 away from the first sidewall 11, and the side of the engaging ring 13 away from the first sidewall 11 is connected to the holding portion 223. The dome 24 is completely attached to the side of the intermediate portion 221 away from the first side wall 11, and the third engagement portion 231d is completely attached to the side of the intermediate portion 221 close to the first side wall 11.

Specifically, the miniature acoustic generator 100 further includes two flexible circuit boards 4 oppositely disposed at intervals along the long axis side direction of the voice coil 21, and the flexible circuit boards 4 include a second main body portion 41 connected to the voice coil 21, an elastic connection portion 42 connected to one end of the second main body portion 41, and a fixing portion 43 connected to the elastic connection portion 42. The fixing portion 43 is fixed on the first sidewall 11, and the other end of the second main body portion 41 is connected to the end of the frame 231 on the same side close to the first sidewall 11. More specifically, the other end of the second body portion 41 is connected to the end of the first body portion 231c on the same side, which is close to the first sidewall 11.

Optionally, in this embodiment, as shown in fig. 6, a first assembling hole 111 and second assembling holes 112 symmetrically disposed on two sides of the first assembling hole 111 are disposed on the first sidewall 11, the first clamping plate 33 is embedded in the first assembling hole 111, and the fixing portions 43 are respectively embedded in the corresponding second assembling holes 112.

Optionally, in this embodiment, the first magnet assembly 31 is composed of five elements with magnetic conductive function. The five elements with the magnetic conduction function comprise three first magnetic steels 311 arranged at intervals along the short axis side direction of the voice coil 21 and pole cores 312 respectively arranged between the adjacent first magnetic steels 311, or second magnetic steels 312 respectively arranged between the adjacent first magnetic steels 311. It should be noted that in some other embodiments, the first magnet assembly 31 is composed of three elements having magnetic conductive function, and in other embodiments, the first magnet assembly 31 is composed of only one element having magnetic conductive function. It is understood that the above all belong to the protection scope of the present invention.

Optionally, in this embodiment, the structure of the second magnet assembly 32 is the same as that of the second magnet assembly 31.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. A miniature sounder is characterized by comprising a shell with a containing space, a vibration system and a magnetic circuit system contained in the containing space, wherein the shell comprises a first side wall and a second side wall bent and extended from the edge of the first side wall,

2. The miniature acoustical generator of claim 1, wherein the first engagement portion is connected to an outer periphery of the voice coil and the second engagement portion is connected to an inner periphery of the voice coil.

3. The miniature acoustical generator of claim 1, wherein the first body portion is attached to the chime.

4. The miniature sounder according to claim 1, wherein the frame further comprises a third engaging portion extending from an edge of the first body portion, and the third engaging portion is fixedly disposed on an inner edge of the diaphragm on a side close to the first sidewall.

5. The miniature sound generator of claim 1, wherein a dome is affixed to the inner edge of the diaphragm on the side away from the first sidewall.

6. The miniature sound generator according to claim 1, further comprising two flexible circuit boards oppositely disposed along the long axis of the voice coil at intervals, wherein the flexible circuit boards comprise a second main body portion connected to the voice coil, an elastic connecting portion connected to one end of the second main body portion, and a fixing portion connected to the elastic connecting portion, the fixing portion is fixed to the first sidewall, and the other end of the second main body portion is connected to the end of the bobbin on the same side, which is close to the first sidewall.

7. The miniature sound generator of claim 6, wherein the magnetic circuit system further comprises a first clamping plate and a second clamping plate spaced apart from each other along the minor axis of the voice coil, the first magnet assembly and the second magnet assembly are disposed between the first clamping plate and the second clamping plate, the first clamping plate is fixed to the first sidewall, a joint ring is sandwiched between the second clamping plate and the diaphragm, and the joint ring is received in the receiving space and fixed to the second sidewall.

8. The miniature acoustical generator of claim 7, wherein the first sidewall has a first assembling hole and second assembling holes symmetrically disposed on both sides of the first assembling hole, the first clamping plate is embedded in the first assembling hole, and the fixing portions are respectively embedded in the corresponding second assembling holes.

9. The miniature acoustical generator of claim 1, wherein each of said first and second magnet assemblies comprises five pieces of magnetic conductive elements, and each of said five pieces of magnetic conductive elements comprises three pieces of first magnetic steel spaced apart along the short axis of said voice coil and a pole piece disposed between adjacent ones of said first magnetic steels, or a second magnetic steel disposed between adjacent ones of said first magnetic steels.