CN212519411U

CN212519411U - Loudspeaker

Info

Publication number: CN212519411U
Application number: CN202020858260.3U
Authority: CN
Inventors: 肖波; 令狐荣林
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-02-09
Anticipated expiration: 2030-05-20
Also published as: WO2021232473A1

Abstract

The utility model provides a loudspeaker, which comprises a shell, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are contained in the shell, the vibration system comprises a voice coil, a first vibrating diaphragm and a second vibrating diaphragm which are arranged at intervals along the short shaft side direction of the voice coil, a framework component for connecting the voice coil with the first vibrating diaphragm and the second vibrating diaphragm, and a diaphragm which is arranged between the first vibrating diaphragm and the second vibrating diaphragm at intervals; the voice coil is vertically arranged between the two magnet assemblies included in the magnetic circuit system; the first vibrating diaphragm and the second vibrating diaphragm are both fixedly arranged on the shell, the peripheral side of the diaphragm is connected with the shell, and the inner peripheral side of the diaphragm is connected with the framework component; the first diaphragm and the shell are enclosed to form a first diaphragm front cavity, the diaphragm, the shell, the second diaphragm and the framework component are enclosed to form a second diaphragm front cavity, and the first diaphragm front cavity and the second diaphragm front cavity are communicated with the outside through a first sound outlet and a second sound outlet in the shell respectively. The width of the magnetic circuit is reduced and the Z-direction size requirement of the loudspeaker is lowered through the mode.

Description

Loudspeaker

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electroacoustic conversion field, concretely relates to speaker.

[ background of the invention ]

In the magnetic circuit vibration system of current speaker, the voice coil loudspeaker voice coil is all transversely put around main magnet steel, and this mode of setting makes the equal broad of magnetic circuit and voice coil loudspeaker voice coil width, is unfavorable for promoting magnetic circuit electromagnetic conversion factor BL and is unfavorable for using in super large amplitude (Xmax >1.0mm) vibration system, and current just pronunciation monomer needs Z to reserve air guide structure simultaneously, can increase Z to the size height.

Therefore, there is a need to provide a new structure of speaker to solve the above technical problems.

[ Utility model ] content

An object of the utility model is to provide a loudspeaker, in this loudspeaker, the voice coil loudspeaker voice coil erects to be arranged in between two magnet subassemblies that the interval set up, and the side sound production to solve among the current loudspeaker magnetic circuit and the equal broad of voice coil loudspeaker voice coil width and to the problem that Z requires highly to the size.

In order to achieve the above object, the present invention provides a speaker, which comprises a housing having a receiving cavity, a vibration system received in the receiving cavity, and a magnetic circuit system for driving the vibration system to vibrate,

the vibration system comprises a voice coil, a first vibrating diaphragm and a second vibrating diaphragm which are arranged at intervals along the short axis side direction of the voice coil, and a framework component which is arranged between the first vibrating diaphragm and the second vibrating diaphragm and used for connecting the voice coil with the first vibrating diaphragm and the second vibrating diaphragm, the first vibrating diaphragm and the second vibrating diaphragm are fixedly arranged on the shell, the framework component is arranged around the magnetic circuit system, a first plane formed by the long axis side and the short axis side of the voice coil is parallel to the vibration direction of the vibration system, the magnetic circuit system comprises a first magnet component and a second magnet component which are arranged at intervals along the direction vertical to the first plane, and the voice coil is arranged between the first magnet component and the second magnet component,

the vibration system also comprises a diaphragm arranged between the first diaphragm and the second diaphragm at intervals, the diaphragm is annular and arranged around the magnetic circuit system, the peripheral side of the diaphragm is connected with the shell, the inner peripheral side of the diaphragm is connected with the framework component,

the first vibrating diaphragm with the casing encloses to close and forms first vibrating diaphragm ante-chamber, the diaphragm with the casing the second vibrating diaphragm reaches the skeleton subassembly encloses to close and forms second vibrating diaphragm ante-chamber, be equipped with first sound outlet and second sound outlet on the casing, first vibrating diaphragm ante-chamber passes through first sound outlet and external intercommunication, second vibrating diaphragm ante-chamber passes through second sound outlet and external intercommunication.

Preferably, the casing comprises an upper cover, a lower cover and a basin frame positioned between the upper cover and the lower cover, the first vibrating diaphragm is clamped between the upper cover and the basin frame, the second vibrating diaphragm is clamped between the basin frame and the lower cover, the peripheral side of the diaphragm is connected with the basin frame,

the first sound outlet is arranged on the upper cover, the first diaphragm front cavity is formed by the first diaphragm and the upper cover in a surrounding mode, the second sound outlet is arranged on the basin frame, and the second diaphragm front cavity is formed by the diaphragm, the basin frame, the second diaphragm and the framework component in a surrounding mode.

Preferably, the skeleton subassembly is including connecting first vibrating diaphragm with the first skeleton of voice coil loudspeaker voice coil, connection the second vibrating diaphragm with the second skeleton of voice coil loudspeaker voice coil and cover are located outside the first skeleton and press from both sides and locate first vibrating diaphragm with third skeleton between the second skeleton, the interior week side of diaphragm presss from both sides and locates the second skeleton with between the third skeleton.

Preferably, the first frame includes a first frame-shaped main body portion holding the first diaphragm, and a first frame portion extending from the first frame-shaped main body portion and connected to the voice coil,

the second framework comprises a second frame-shaped main body part for fixing the second diaphragm and a second support part extending from the second frame-shaped main body part and used for connecting the voice coil,

the third frame includes a third frame-shaped main body portion that holds the first diaphragm, and the inner peripheral side of the diaphragm is sandwiched between the third frame-shaped main body portion and the second frame-shaped main body portion.

Preferably, an annular cushion edge is sandwiched between the diaphragm and the second frame-shaped main body portion, the third framework further includes a plurality of third support portions extending from the third frame-shaped main body portion toward the second framework, and an outer side wall of each third support portion is abutted to an inner side wall of the cushion edge.

Preferably, the vibration system further includes a flexible circuit board sandwiched between the second diaphragm and the second frame, and the flexible circuit board is electrically connected to the voice coil.

Preferably, the first diaphragm includes a first upper sound film connected with the first skeleton and the third skeleton, and a spacer sleeve is arranged outside the first upper sound film and clamped between the upper cover and a second upper sound film between the basin frames, and a first dome connected with the first upper sound film and the second upper sound film, and the first upper sound film and the second upper sound film include a folded ring portion protruding towards the upper cover.

Preferably, the second diaphragm includes a lower sound film sandwiched between the lower cover and the frame, and a second dome connecting the lower sound film and the second skeleton, and the lower sound film includes a corrugated portion recessed toward the lower cover.

Preferably, the first sound outlet and the second sound outlet are located on the same side of the speaker.

Preferably, the magnetic circuit system further comprises an upper clamp plate and a lower clamp plate which are arranged at intervals along the short axis side direction of the voice coil, the first magnet assembly and the second magnet assembly are arranged between the upper clamp plate and the lower clamp plate, the lower clamp plate is fixed on the lower cover, and the upper clamp plate is clamped between the upper cover and the first magnet assembly and between the upper cover and the second magnet assembly.

Preferably, the first magnet assembly comprises three pieces of first magnetic steel arranged at intervals along the short axis of the voice coil and a pole core arranged between the adjacent first magnetic steel or a second magnetic steel arranged between the adjacent first magnetic steel.

The beneficial effects of the utility model reside in that: the utility model provides a loudspeaker, including having the casing of acceping the chamber and accept in accept vibration system and the magnetic circuit in the intracavity, vibration system includes the voice coil loudspeaker voice coil, the voice coil loudspeaker voice coil erects to be arranged between two magnet subassemblies that the interval set up, and the voice coil loudspeaker voice coil is horizontal around main magnet steel among the prior art in comparison, has reduced the magnetic circuit width, has reduced the voice coil loudspeaker voice coil width, can promote magnetic circuit electromagnetism conversion factor BL and product SPL, and the advantage among the especially super large amplitude (Xmax >1.0mm) vibration system is more obvious. In addition, the vibration system also comprises a first vibrating diaphragm and a second vibrating diaphragm which are arranged at intervals along the short axis side direction of the voice coil, a framework component which is arranged between the first vibrating diaphragm and the second vibrating diaphragm and is used for connecting the voice coil with the first vibrating diaphragm and the second vibrating diaphragm, and a diaphragm which is arranged between the first vibrating diaphragm and the second vibrating diaphragm at intervals, the first vibrating diaphragm and the second vibrating diaphragm are both fixedly arranged on the shell, the peripheral side of the diaphragm is connected with the shell, the inner peripheral side of the diaphragm is connected with the framework component, the first diaphragm and the shell are enclosed to form a first diaphragm front cavity, the diaphragm, the shell, the second diaphragm and the framework component are enclosed to form a second diaphragm front cavity, the first diaphragm front cavity is communicated with the outside through a first sound outlet on the shell, and the second diaphragm front cavity is communicated with the outside through a second sound outlet on the shell. Through set up first sound outlet and second sound outlet in the speaker side, can save the air water conservancy diversion structure of speaker Z to (speaker thickness direction promptly), reduce the loss of monomer air current in air guide structure simultaneously, promote product tone quality performance.

[ description of the drawings ]

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

fig. 2 is a schematic diagram of a partially exploded structure of a speaker according to an embodiment of the present invention;

fig. 3 is a schematic partial exploded view of a speaker according to an embodiment of the present invention;

fig. 4 is a second schematic exploded view of a part of the speaker according to the embodiment of the present invention;

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

FIG. 6 is a schematic cross-sectional view taken along line B-B of FIG. 1;

reference numerals: a speaker 100; a housing 1; an upper cover 11; a cover plate 111; a first outer wall 112; a recessed portion 113; a basin stand 12; a frame body 121; an extension portion 122; a fixed column 123; a lower cover 13; a bottom wall 131; a second outer wall 132; a second through hole 133; a first sound outlet 14; a second sound outlet 15; a vibration system 2; a voice coil 21; a first diaphragm 22; a first upper sound film 221; a second upper sound diaphragm 222; a first dome 223; a skeleton assembly 23; a first skeleton 231; a first frame-shaped body portion 2311; a first bent portion 2311 a; a second bending portion 2311 b; a first frame portion 2312; a second backbone 232; a second frame-shaped body portion 2321; a third bent portion 2321 a; a fourth bent portion 2321 b; a fifth bent part 2321 c; a second bracket portion 2322; a third skeleton 233; a third frame-shaped body portion 2331; a sixth bent portion 2331 a; a seventh bent portion 2331 b; an eighth bent portion 2331 c; a third bracket portion 2332; an opening 2333; a rim 234; a second diaphragm 24; a lower sound film 241; a second ball top 242; a diaphragm 25; a flexible circuit board 26; a first through hole 261; 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; an upper clamp plate 33; a lower jaw 34.

[ 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 speaker 100, which includes a housing 1 having a receiving cavity, a vibration system 2 received in the receiving cavity, and a magnetic circuit system 3 for driving the vibration system 2 to vibrate.

Specifically, the vibration system 2 includes a voice coil 21, and a first plane (i.e., a YZ plane shown in fig. 6) formed by a long axis side and a short axis side of the voice coil 21 is parallel to a vibration direction (i.e., a Z direction shown in fig. 5 to 6) of the vibration system 2. 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. The utility model discloses an above-mentioned mode erects voice coil loudspeaker voice coil 21 between first magnet subassembly 31 and the second magnet subassembly 32 that the interval set up, and the voice coil loudspeaker voice coil is horizontal around main magnet steel among the prior art in comparison, has reduced the magnetic circuit width, has reduced the voice coil loudspeaker voice coil width, can promote magnetic circuit electromagnetic conversion factor BL and product SPL, and the advantage in especially super large amplitude (Xmax >1.0mm) vibration system is more obvious.

Specifically, the vibration system 2 further includes a first diaphragm 22 and a second diaphragm 24 that are disposed along the short axis side direction of the voice coil 21 at intervals, a skeleton assembly 23 that is disposed between the first diaphragm 22 and the second diaphragm 24 and is used for connecting the voice coil 21 with the first diaphragm 22 and the second diaphragm 24, and a diaphragm 25 that is disposed between the first diaphragm 22 and the second diaphragm 24 at intervals. The first diaphragm 22 and the second diaphragm 24 are both fixed on the casing 1, and the skeleton assembly 23 and the diaphragm 25 are both disposed around the magnetic circuit system 3. The diaphragm 25 is annular, and the outer peripheral side of the diaphragm 25 is connected to the housing 1 and the inner peripheral side thereof is connected to the bobbin assembly 23.

Further, the first diaphragm 22 and the housing 1 enclose to form a first diaphragm front cavity, and the diaphragm 25, the housing 1, the second diaphragm 24 and the skeleton component 23 enclose to form a second diaphragm front cavity. The casing 1 is provided with a first sound outlet 14 and a second sound outlet 15, the first diaphragm front cavity is communicated with the outside through the first sound outlet 14, and the second diaphragm front cavity is communicated with the outside through the second sound outlet 15. Except for the first diaphragm front cavity and the second diaphragm front cavity, the rest of the accommodating cavity of the shell 1 is a rear cavity of the loudspeaker 100. By providing the diaphragm 25 to isolate the second diaphragm front cavity from the back cavity, acoustic shorting of the loudspeaker 100 is avoided.

The utility model discloses a set up in vibration system 2 by first vibrating diaphragm 22 with the double-diaphragm vibration sound production structure that second vibrating diaphragm 24 constitutes jointly has effectively improved vibration system 2's vibrating diaphragm effective vibration area (SD), has improved speaker 100's sound production loudness to make speaker 100's acoustic performance excellent. Meanwhile, the first sound outlet 14 communicated with the outside of the front cavity of the first vibrating diaphragm and the second sound outlet 15 communicated with the outside of the front cavity of the second vibrating diaphragm are arranged on the side face of the loudspeaker 100, so that an air flow guiding structure of the loudspeaker in the Z direction (namely the thickness direction of the loudspeaker) can be saved, the loss of single air flow in the air flow guiding structure is reduced, and the product tone quality performance is improved.

Optionally, the first sound outlet 14 and the second sound outlet 15 are located on the same side of the speaker 100.

Specifically, the housing 1 includes an upper cover 11, a lower cover 13, and a basin frame 12 located between the upper cover 11 and the lower cover 13, wherein the upper cover 11, the basin frame 12 and the lower cover 13 enclose to form the accommodating cavity. The first diaphragm 22 is sandwiched between the upper cover 11 and the frame 12, the second diaphragm 24 is sandwiched between the frame 12 and the lower cover 13, and the outer peripheral side of the diaphragm 25 is connected to the frame 12. The first sound outlet 14 is arranged on the upper cover 11, the first diaphragm front cavity is formed by the first diaphragm 22 and the upper cover 11 in a surrounding manner, the second sound outlet 15 is arranged on the basin frame 12, and the second diaphragm front cavity is formed by the diaphragm 25, the basin frame 12, the second diaphragm 24 and the framework component 23 in a surrounding manner.

Specifically, the bobbin assembly 23 includes a first bobbin 231 connecting the first diaphragm 22 and the voice coil 21, a second bobbin 232 connecting the second diaphragm 24 and the voice coil 21, and a third bobbin 233 sleeved outside the first bobbin 231 and sandwiched between the first diaphragm 22 and the second bobbin 232, wherein the inner peripheral side of the diaphragm 25 is sandwiched between the second bobbin 232 and the third bobbin 233. The voice coil 21 is suspended between the first magnet assembly 31 and the second magnet assembly 32 by the supporting action of the first bobbin 231 and the second bobbin 232.

Further, the first bobbin 231 includes a first frame body portion 2311 for holding the first diaphragm 22, and a first frame portion 2312 extending from the first frame body portion 2311 for connecting the voice coil 21. The second bobbin 232 includes a second frame-shaped main body portion 2321 for holding the second diaphragm 24, and a second support portion 2322 extending from the second frame-shaped main body portion 2321 for connecting the voice coil 21. The third frame 233 includes a third frame portion 2331 for holding the first diaphragm 22, and the inner peripheral side of the diaphragm 25 is interposed between the third frame portion 2331 and the second frame portion 2321.

Preferably, an annular rim 234 is interposed between the diaphragm 25 and the second frame-shaped main body portion 2321, and the rim 234 is a frame-shaped combination body, so that the bonding position between the second frame-shaped main body portion 2321 and the third frame-shaped main body portion 2331 can be strengthened and the bonding position can be firmer.

Optionally, the third frame 233 further includes a plurality of third frame portions 2332 extending from the third frame body 2331 toward the second frame 232, and an outer sidewall of the third frame portions 2332 abuts against an inner sidewall of the rim 234.

Optionally, the third frame body 2331 further has a plurality of openings 2333, and the openings 2333 are configured to communicate with the rear chamber of the receiving chamber.

Referring to fig. 3, 5, and 6, in the present embodiment, the first frame-shaped body portion 2311 includes a first bending portion 2311a and a second bending portion 2311b formed by bending a substrate, the first bending portion 2311a is used for holding the first diaphragm 22, and the second bending portion 2311b encloses a hollow cavity. The first bobbin 231 includes two first brackets 2312 extending from the second bent portion 2311b, the two first brackets 2312 are spaced apart from each other in a longitudinal direction (Y direction shown in fig. 6) of the voice coil 21, and the voice coil 21 is connected to the two first brackets 2312 on a side close to the upper cover 11.

With reference to fig. 3, 5 and 6, in the present embodiment, the second frame-shaped body 2321 includes a third bending portion 2321a, a fourth bending portion 2321b and a fifth bending portion 2321c formed by continuously bending a substrate. The rim 234 is interposed between the third bent portion 2321a and the inner peripheral side of the diaphragm 25. The fourth bending portion 2321b encloses a hollow inner cavity, and the fifth bending portion 2321c is used for fixing the second diaphragm 24. The second bobbin 232 includes two second support portions 2322 extending from the fifth bending portion 2321c, the two second support portions 2322 are disposed at intervals along a long axis side direction of the voice coil 21, and a side of the voice coil 21 away from the upper cover 11 is connected to the two second support portions 2322. The voice coil 21 is suspended between the first and

second magnet assemblies

31 and 32 by the supporting action of the two first and

second yoke portions

2312 and 2322.

Optionally, the two second support portions 2322 and the fifth bending portion 2321c are located on the same plane.

Optionally, the third frame portion 2332 may also abut the second frame-shaped body portion 2321, for example, by laser spot welding, to increase the vibration stability of the speaker 100.

As shown in fig. 3, 5 and 6, in the present embodiment, the third frame-shaped body portion 2331 includes a sixth bent portion 2331a, a seventh bent portion 2331b and an eighth bent portion 2331c, which are continuously bent from a substrate. The sixth bent portion 2331a is used to hold the first diaphragm 22. The seventh bending portion 2331b encloses a hollow cavity, the plurality of openings 2333 are disposed on the seventh bending portion 2331b, and the first frame 231 is received in the hollow cavity. The inner peripheral side of the diaphragm 25 is interposed between the eighth bent portion 2331c and the rim 234. The third frame 233 includes 4 third frame portions 2332 extending from the eighth bending portion 2331c toward the second frame 232.

Specifically, the vibration system 2 further includes a flexible circuit board 26 interposed between the second diaphragm 24 and the second framework 232, and the flexible circuit board 26 is electrically connected to the voice coil 21.

Optionally, the first diaphragm 22 may be a complete diaphragm, or a diaphragm and a dome. In this embodiment, the first diaphragm 22 includes a first upper sound film 221 connected to the first framework 231 and the third framework 233, a second upper sound film 222 disposed outside the first upper sound film 221 in a spaced manner and sandwiched between the upper cover 11 and the basin stand 12, and a first dome 223 connected to the first upper sound film 221 and the second upper sound film 222. The first upper sound film 221 is sleeved outside the magnetic circuit system 3, and both the first upper sound film 221 and the second upper sound film 222 include a folded ring portion a protruding toward the upper cover 11.

Optionally, the second diaphragm 24 may be a complete diaphragm, or a diaphragm and a dome. In this embodiment, the first diaphragm 24 includes a lower sound film 241 interposed between the lower cover 13 and the frame 12, and a second dome 242 connecting the lower sound film 241 and the second skeleton 232, the second dome 242 is disposed around the magnetic circuit system 3, and the lower sound film 241 includes a folded ring portion b recessed toward the lower cover 13.

Specifically, the magnetic circuit system 3 further includes an upper plate 33 and a lower plate 34 spaced apart from each other in a short-axis direction (Z direction as shown in fig. 5 to 6) of the voice coil 21, and the first magnet assembly 31 and the second magnet assembly 32 are disposed between the upper plate 33 and the lower plate 34. The lower clamp plate 34 is fixed to the lower cover 13, and the upper clamp plate 33 is interposed between the upper cover 11 and the first magnet assembly 31, and between the upper cover 11 and the second magnet assembly 32. By arranging the

magnet assemblies

31 and 32 between the upper clamping plate 33 and the lower clamping plate 34 to fix the two

magnet assemblies

31 and 32, the magnetic circuit system structure can be effectively protected when the product falls, and the falling resistance of the product is improved.

Specifically, the frame 12 includes a frame 121 and an extension portion 122 extending from the center of the frame 121 toward the magnetic circuit system 3; the upper cover 11 includes a cover plate 111, a first outer wall 112 extending from an edge of the cover plate 111 toward the frame 121; the lower cover 13 includes a bottom wall 131 opposite to the cover plate 111, and a second outer wall 132 extending from an edge of the bottom wall 131 toward the frame 121; the cover plate 111, the first outer wall 112, the frame 121, the second outer wall 132, and the bottom wall 131 enclose a receiving cavity forming the housing 1, the first sound outlet 14 is disposed on the first outer wall 112, and the second sound outlet 15 is disposed on the frame 121.

Optionally, in this embodiment, the cover plate 111 is embedded in the first outer wall 112, a recess 113 is disposed in the center of the cover plate 111, the upper clamp plate 33 is fixed on the recess 113, and the lower clamp plate 34 is fixed on the bottom wall 131.

Alternatively, in the present embodiment, the outer peripheral side of the diaphragm 25 is connected to the extension portion 122, and the diaphragm 25 further includes an intermediate portion c that protrudes toward the first diaphragm 22.

Optionally, the first magnet assembly 31 includes three first magnetic steels 311 arranged along the short axis side direction of the voice coil 21 at intervals and pole cores 312 arranged between the adjacent first magnetic steels 311, or second magnetic steels 312 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 first magnet assembly 31.

Optionally, fixed columns 123 are respectively arranged at four top corners of the bottom of the basin stand 12, first through holes 261 are respectively arranged at corresponding positions of the flexible circuit board 26, second through holes 133 are respectively arranged at corresponding positions of the lower cover 13, and the basin stand 12 and the lower cover 13 are fixed after the fixed columns 123 sequentially penetrate through the first through holes 261 and the second through holes 133.

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 loudspeaker is characterized by comprising a shell with a containing cavity, a vibration system contained in the containing cavity and a magnetic circuit system used for driving the vibration system to vibrate,

2. The loudspeaker of claim 1, wherein the housing includes an upper cover, a lower cover, and a frame between the upper cover and the lower cover, the first diaphragm is sandwiched between the upper cover and the frame, the second diaphragm is sandwiched between the frame and the lower cover, and an outer peripheral side of the diaphragm is connected to the frame,

3. The loudspeaker of claim 2, wherein the bobbin assembly comprises a first bobbin connecting the first diaphragm and the voice coil, a second bobbin connecting the second diaphragm and the voice coil, and a third bobbin sleeved outside the first bobbin and sandwiched between the first diaphragm and the second bobbin, and the inner peripheral side of the diaphragm is sandwiched between the second bobbin and the third bobbin.

4. The speaker of claim 3, wherein the first bobbin includes a first frame-shaped body portion holding the first diaphragm, and a first support portion extending from the first frame-shaped body portion for connecting the voice coil,

5. The speaker of claim 4, wherein an annular rim is interposed between the diaphragm and the second frame-shaped main body portion, the third frame further includes a plurality of third frame portions extending from the third frame-shaped main body portion toward the second frame, and an outer sidewall of the third frame portion abuts against an inner sidewall of the rim.

6. The loudspeaker of claim 3, wherein the vibration system further comprises a flexible circuit board sandwiched between the second diaphragm and the second bobbin, the flexible circuit board being electrically connected to the voice coil.

7. The loudspeaker of claim 3, wherein the first diaphragm comprises a first upper sound film connected with the first framework and the third framework, a second upper sound film arranged outside the first upper sound film in a spaced manner and clamped between the upper cover and the basin frame, and a first dome connecting the first upper sound film and the second upper sound film, and the first upper sound film and the second upper sound film comprise folded ring portions protruding in the direction away from the framework components.

8. The loudspeaker of claim 3, wherein the second diaphragm comprises a lower diaphragm sandwiched between the lower cover and the frame, and a second dome connecting the lower diaphragm and the second frame, the lower diaphragm comprising a folded ring portion that is recessed away from the frame assembly.

9. The speaker of claim 1, wherein the first sound outlet and the second sound outlet are located on the same side of the speaker.

10. The loudspeaker of claim 2, wherein the magnetic circuit further comprises an upper clamp plate and a lower clamp plate spaced apart along a short axis of the voice coil, the first magnet assembly and the second magnet assembly being disposed between the upper clamp plate and the lower clamp plate, the lower clamp plate being fixed to the lower cover, the upper clamp plate being interposed between the upper cover and the first magnet assembly and between the upper cover and the second magnet assembly.

11. The loudspeaker of claim 1, wherein the first magnet assembly comprises three pieces of first magnetic steel arranged at intervals along the short axis direction of the voice coil and pole cores respectively arranged between the adjacent first magnetic steel, or second magnetic steel respectively arranged between the adjacent first magnetic steel.