CN112312285A

CN112312285A - Voice coil, loudspeaker and portable electronic equipment

Info

Publication number: CN112312285A
Application number: CN201910684101.8A
Authority: CN
Inventors: 吴桂敏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2021-02-02

Abstract

The embodiment of the application provides a portable electronic device and a loudspeaker and a voice coil which are applied to the electronic device. The portable electronic device includes a housing and a speaker. The loudspeaker comprises a diaphragm group, a voice coil and a magnetic circuit system. The diaphragm group and the voice coil are arranged with the same central axis, and at least part of the voice coil is positioned in the magnetic circuit system, and under the action of a magnetic field, the vibration of the voice coil provides driving force for the diaphragm group so as to enable the diaphragm group to sound. The voice coil includes outer sub voice coil and interior sub voice coil, and interior sub voice coil laminating sets up in the inner wall of outer sub voice coil. The size of the inner sub voice coil in the direction of the central axis is larger than that of the outer sub voice coil in the direction of the central axis, and the inner sub voice coil is fixedly connected with the vibrating diaphragm group. This application voice coil loudspeaker voice coil can avoid using the voice coil loudspeaker voice coil skeleton at the in-process that uses, and molding process is simple, and the reliability is stronger.

Description

Voice coil, loudspeaker and portable electronic equipment

Technical Field

The application relates to the technical field of speakers, in particular to a voice coil, a speaker and a portable electronic device.

Background

With the development of portable electronic device technology, people have higher and higher requirements for the external sound playing effect of portable electronic devices such as notebook computers. To increase the loudness of a loudspeaker usually requires increasing the amplitude of the loudspeaker. However, after the vibration space of the voice coil is secured, the voice coil is not symmetrical in the magnetic circuit system, thereby causing distortion.

In order to make the voice coil atress balanced, current scheme is to increase the skeleton on the voice coil and bond skeleton and vibrating diaphragm to make more parts of voice coil stretch into magnetic circuit, and then guarantee the atress balance of voice coil. However, the voice coil is deformed during the manufacturing process, so that the voice coil and the framework are poor in adaptability, the bonding process is low in efficiency, and the manufacturing cost is high. In addition, the skeleton may increase the mass of the vibration, i.e., the skeleton participates in the vibration but cannot provide a driving force, thereby affecting the sensitivity of the vibration system.

Disclosure of Invention

An object of the present application is to provide a speaker and a portable electronic device, which can improve the amplitude of the speaker and the sensitivity of a vibration system, and the voice coil is relatively simple in molding process and high in reliability.

The above and other objects are achieved by the features of the independent claims. Further implementations are presented in the dependent claims, the description and the drawings.

In a first aspect, an embodiment of the present application discloses a voice coil, which includes an outer sub voice coil and an inner sub voice coil, where the inner sub voice coil is attached to an inner wall of the outer sub voice coil; the outer sub voice coil and the inner sub voice coil are arranged on the same central axis, and the size of the inner sub voice coil in the direction of the central axis is larger than that of the outer sub voice coil in the direction of the central axis.

The voice coil loudspeaker voice coil that this application embodiment provided can avoid using the voice coil loudspeaker voice coil skeleton at the in-process that uses, and one shot forming makes interior sub-voice coil loudspeaker voice coil when making the voice coil loudspeaker voice coil, simple process, and the suitability is better, and then can improve the reliability of voice coil loudspeaker voice coil.

In one embodiment, for balancing the weight of the voice coil or facilitating the adhesive fixation, the outer sub voice coil and the inner sub voice coil respectively comprise first ends along the direction of the central axis; the first end of the inner sub-voice coil and the first end of the outer sub-voice coil are flush.

In one embodiment, in order to improve the use efficiency of the voice coil, a radial thickness of the inner sub-voice coil in a direction perpendicular to the central axis is smaller than a radial thickness of the outer sub-voice coil in a direction perpendicular to the central axis.

The extending direction of the central axis is taken as a longitudinal direction, and the radial direction refers to the direction perpendicular to each transverse direction of the longitudinal direction.

In a second aspect, an embodiment of the present application discloses a speaker, which includes a diaphragm group, a voice coil, and a magnetic circuit system; the diaphragm group and the voice coil are arranged on the same central axis; the voice coil is at least partially positioned in the magnetic circuit system, and under the action of the magnetic field, the vibration of the voice coil provides driving force for the diaphragm group so as to enable the diaphragm group to sound; the voice coil includes:

an outer sub-voice coil; and

the inner sub voice coil is attached to the inner wall of the outer sub voice coil;

wherein the inner sub voice coil has a dimension in the central axis direction larger than a dimension of the outer sub voice coil in the central axis direction; the inner sub voice coil is fixedly connected with the vibrating diaphragm group.

The speaker that provides in this application embodiment because the voice coil loudspeaker voice coil include outer son voice coil loudspeaker voice coil and laminate in the interior son voice coil loudspeaker voice coil that the inner wall of outer son voice coil loudspeaker voice coil set up, just interior son voice coil loudspeaker voice coil is followed the central axis direction size is greater than outer son voice coil loudspeaker voice coil is followed the size of central axis direction, interior son voice coil loudspeaker voice coil be used for with vibrating diaphragm group fixed mounting, the voice coil loudspeaker voice coil in this application embodiment promptly can avoid using the voice coil loudspeaker voice coil skeleton in the in-process that uses, and because interior son voice coil loudspeaker voice coil is a part of voice coil loudspeaker voice coil, can make interior son voice coil loudspeaker voice coil, simple process in one shot. Furthermore, because the inner sub voice coil and the outer sub voice coil are manufactured at the same time and formed at one time, the adaptability is better, and the problem that the reliability is influenced due to poor adaptability can be avoided.

In one embodiment, the magnetic circuit system comprises an inner magnet, an outer magnet, an inner magnetic conductive plate, an outer magnetic conductive plate and a vibration space; the inner magnetic conductive plate and the inner magnet are sequentially stacked, and the outer magnetic conductive plate and the outer magnet are sequentially stacked; the outer magnetic conduction plate is positioned at the periphery of the inner magnetic conduction plate, and the outer magnetic conduction plate and the inner magnetic conduction plate are spaced by the vibration space; the outer magnets are positioned on the periphery of the inner magnets, and the outer magnets and the inner magnets are spaced through the vibration space; the voice coil is located in the vibration space and surrounds the periphery of the inner magnetic conducting plate and part of the inner magnets. Therefore, the voice coil can generate driving force under the action of the magnetic field after being electrified so as to drive the diaphragm group to vibrate, and magnetic lines of force can be cut in the vibrating process.

In one embodiment, the outer sub voice coil and the inner sub voice coil each include a first end in the direction of the central axis; the first end of the inner sub voice coil and the first end of the outer sub voice coil are flush. Specifically, the first end of the inner sub voice coil and the first end of the outer sub voice coil, which are flush, extend into the vibration space; or the first end of the inner sub voice coil and the first end of the outer sub voice coil which are flush are fixedly connected with the vibrating diaphragm group. Thus, the part of the voice coil extending into the vibration space can be increased, or the contact area of the voice coil and the diaphragm group can be increased.

In one embodiment, in order to make the outer sub voice coil closer to the inner magnet to improve the use efficiency of the voice coil, a radial thickness of the inner sub voice coil perpendicular to the central axis direction is smaller than a radial thickness of the outer sub voice coil perpendicular to the central axis direction. The extending direction of the central axis is taken as a longitudinal direction, and the radial direction refers to the direction perpendicular to each transverse direction of the longitudinal direction.

In one embodiment, the loudspeaker further comprises a frame and a magnetic bowl for supporting the diaphragm group and fixing the magnetic circuit system; the frame comprises a first side surface and a second side surface opposite to the first side surface; the periphery of the diaphragm group is fixed on the first side surface; the magnetic bowls are positioned on the second side surface, and the magnetic conduction plate and the outer magnet are sequentially stacked and clamped between the basin frame and the magnetic bowls; the inner magnet and the inner magnetic conductive plate are sequentially stacked and fixed on the magnetic bowl, and the inner magnetic conductive plate extends into the voice coil and is arranged at an interval with the voice coil. Therefore, all parts of the loudspeaker can be fixed together, and the installation is firmer.

In one embodiment, the diaphragm set comprises a diaphragm sheet and a dome, wherein the diaphragm sheet comprises a corrugated rim and a flat film surrounded by the corrugated rim; the dome is laminated to one side of the flat film; the voice coil is located on one side, away from the dome, of the flat membrane and is fixedly connected with the flat membrane. So, the bonding of the voice coil loudspeaker voice coil of being convenient for, and improved the fixed stability of voice coil loudspeaker voice coil.

In a third aspect, an embodiment of the present application discloses a portable electronic device, which includes a housing and the speaker of the second aspect; the casing includes sound chamber and phonate hole, the speaker accept in the sound chamber and with the sound chamber forms the sound conduction passageway, the phonate hole intercommunication sound conduction passageway and external world.

Drawings

In order to explain the technical solutions in the embodiments or background art of the present application, the drawings used in the embodiments or background art of the present application will be described below.

Fig. 1 is a perspective view of an electronic device in an embodiment of the present application.

Fig. 2 is a perspective view of a speaker according to an embodiment of the present application.

Fig. 3 is an exploded perspective view of an embodiment of the speaker shown in fig. 2.

Fig. 4 is a cross-sectional view of the loudspeaker shown in fig. 2 taken along the angle IV-IV.

Fig. 5 is a cross-sectional view of an embodiment of the voice coil shown in fig. 3.

Fig. 6 is a cross-sectional view of another embodiment of the voice coil shown in fig. 3.

Fig. 7 is a cross-sectional view of a speaker in another embodiment of the present application.

Detailed Description

The application provides a portable electronic equipment, be applied to the speaker that is arranged in playing the volume among the portable electronic equipment and be applied to the voice coil loudspeaker voice coil among the speaker, can improve the amplitude of speaker through this voice coil loudspeaker voice coil is direct to bond with the vibrating diaphragm, and the molding process of this voice coil loudspeaker voice coil is fairly simple, and the reliability is higher. In addition, the sensitivity of the vibration system is improved due to the avoidance of the skeleton. Embodiments of the present application are described below with reference to the accompanying drawings.

Please refer to fig. 1, which is a perspective view of a portable electronic device 200 according to an embodiment of the present application. The portable electronic device 200 may be any portable electronic device such as a smart phone, a tablet computer, a Personal Digital Assistant (PDA), a point of sale (POS), a vehicle-mounted computer, a desktop computer, a notebook computer, and a smart television, which is not limited in this embodiment.

As shown in fig. 1, in the embodiment of the present application, the electronic device 100 is described by taking a notebook computer as an example. The electronic device 200 includes a main body 210, a screen 220, and a keypad 230 and a speaker 100 on the main body 210. The speaker 100 is located at any position on the main body 210 on one side of the keypad 230, and is used for playing volume. In the embodiment of the present application, the speaker 100 is disposed on the upper portion of the keypad 230. It is understood that a circuit board (not shown) electrically connected to the speaker 100 is also provided in the main body 210. The housing of the main body 210 further includes a sound cavity (not shown) and a sound outlet 201, the speaker 100 is accommodated in the sound cavity and forms a sound transmission channel with the sound cavity, and the sound outlet 201 is communicated with the sound transmission channel and the outside. The sound signal generated by the speaker 100 passes through the sound transmission channel and then is transmitted out of the outside through the sound outlet 201.

Referring to fig. 2 and fig. 3, fig. 2 is a perspective view of a speaker 100 according to an embodiment of the present application, and fig. 3 is an exploded perspective view of the speaker 100 in fig. 2. The speaker 100 includes a diaphragm assembly 10, a voice coil 20, and a magnetic circuit system 30. The diaphragm group 10 and the voice coil 20 are arranged along the same central axis O, the voice coil 20 is mounted on the diaphragm group 10, and a magnetic field is formed in the magnetic circuit system 30, wherein the north pole to the south pole of the generated magnetic field extends along the central axis O. The voice coil 20 is at least partially located in the magnetic field generated by the magnetic circuit system 30, and under the action of the magnetic field, the vibration of the voice coil 20 provides a driving force for the diaphragm assembly 10 to make the diaphragm assembly 10 generate sound. Wherein the voice coil 20 includes an outer sub-voice coil 21 and an inner sub-voice coil 22. The inner sub-voice coil 22 is attached to the inner wall of the outer sub-voice coil 21. In this embodiment, the dimension of the inner sub voice coil 22 along the central axis O is larger than the dimension of the outer sub voice coil 21 along the central axis O, and the inner sub voice coil 22 is used to be fixedly mounted on the diaphragm set.

The voice coil 20 in some embodiments of the present embodiment is a rectangular ring body, and the central axis extending direction is a longitudinal direction, and the radial direction thereof refers to a direction perpendicular to each lateral direction of the longitudinal direction.

The speaker 100 that provides in the embodiment of this application, because voice coil 20 includes outer sub voice coil 21 and laminate in the inner sub voice coil 22 that the inner wall of outer sub voice coil 21 set up, just inner sub voice coil 22 is followed central axis O direction size is greater than outer sub voice coil 21 is followed the size of central axis O direction, inner sub voice coil 22 be used for with vibrating diaphragm group fixed mounting, voice coil 20 in this application embodiment promptly can avoid using the voice coil skeleton in the in-process that uses, and because inner sub voice coil 22 is a part of voice coil 20, can once forming when preparation voice coil 20 produce inner sub voice coil 22, simple process. Further, because the inner sub voice coil 22 and the outer sub voice coil 21 are manufactured at the same time and formed at one time, the adaptability is better, and the problem that the reliability is affected due to poor adaptability can be further avoided.

In addition, the force balance and sensitivity of the voice coil 20 in the magnetic circuit system 30 can be improved by adjusting the wire of the inner sub-voice coil 22. For example, the inner sub voice coil 22 and the outer sub voice coil 21 may be made of the same material and have different wire diameters. The wire diameter and the wire length used for winding the inner voice coil 22 and the outer voice coil 21 affect the internal resistances of the inner voice coil 22 and the outer voice coil 21, and further affect the strength of the driving force generated by the voice coil 20. For example, the inner voice coil 22 may be turned off and only the outer voice coil 21 may be turned on to generate a driving force during use, but the inner voice coil 22 and the outer voice coil 21 may be turned on to adjust the internal resistance of each voice coil by the wire diameter and the wire length of the inner voice coil 22 and the outer voice coil 21.

Referring to fig. 4, fig. 4 is a cross-sectional view of the speaker 100 of fig. 2 along the direction IV-IV. In some embodiments, the magnetic circuit system includes an inner magnet 31, an outer magnet 32, an inner magnetic conductive plate 33, and an outer magnetic conductive plate 34. The magnetic lines of force of the inner magnet 31 enter the inner magnetic conductive plate 33 and are distributed around the inner magnetic conductive plate 33, and the distributed magnetic field simultaneously enters the outer magnetic conductive plate 34, enters the outer magnet 32 through the outer magnetic conductive plate 34 and then returns to the inner magnet 31. Therefore, after the voice coil 30 is electrified, a driving force is generated under the action of the magnetic field to drive the diaphragm group 10 to vibrate, and magnetic lines of force can be cut in the vibrating process.

In some embodiments, to provide space for the vibration of the voice coil 20, the magnetic circuit system 30 further includes a vibration space S. The inner magnetic conductive plate 33 and the inner magnet 31 are sequentially stacked, and the outer magnetic conductive plate 34 and the outer magnet 32 are sequentially stacked. The outer magnetic conductive plate 34 is located on the periphery of the inner magnetic conductive plate 33, and the outer magnetic conductive plate 34 and the inner magnetic conductive plate 33 are spaced by the vibration space S. The outer magnet 32 is located on the periphery of the inner magnet 31, and the outer magnet 32 and the inner magnet 31 are spaced by the vibration space S. The voice coil 20 is located in the vibration space S, and the voice coil 20 surrounds the periphery of the inner magnetic conductive plate 33 and part of the inner magnet 31.

Specifically, the inner magnet 31 and the inner magnetic conductive plate 33 are rectangular plate bodies. The outer magnet 32 and the outer magnetic conducting plate 34 are four rectangular strip-shaped plate bodies. In the present embodiment, the four outer magnets 32 are spaced apart from each other, and the four outer magnetic conductive plates 34 are also spaced apart from each other, so as to facilitate the formation of the magnetic circuit.

In order to increase the portion of the voice coil 20 extending into the vibration space, in some embodiments, the outer sub-voice coil 21 and the inner sub-voice coil 22 include a first end and a second end, respectively, in the direction of the central axis O. The first end of the inner sub-voice coil 22 is flush with the first end of the outer sub-voice coil 21, and the first end of the inner sub-voice coil 22 which is flush with the outer sub-voice coil 21 extends into the vibration space S.

Referring to fig. 5 and fig. 6, wherein fig. 5 and fig. 6 are cross-sectional views of a voice coil 20 according to different embodiments, respectively. In a specific embodiment, in order to make the outer sub voice coil 21 closer to the inner magnet 31 to improve the use efficiency of the voice coil 20, the radial thickness H1 of the inner sub voice coil 22 perpendicular to the central axis O is smaller than the radial thickness H2 of the outer sub voice coil 21 perpendicular to the central axis O.

It should be noted that, in each embodiment of the present application, the materials of the wires for winding the outer voice coil 21 and the inner voice coil 22 may be the same or different, for example, the wires such as copper wire, copper-silver alloy wire, and copper-clad aluminum wire may be used to wind the outer voice coil 21 and the inner voice coil 22. In addition, the wire diameter of the wire for winding the outer sub voice coil 21 and the inner sub voice coil 22 is not limited. For example, the outer sub-voice coil 21 and the inner sub-voice coil 22 may be wound with wires of the same material but different wire diameters, so that the magnetic field intensity and the wire length may be balanced.

Referring to fig. 7, fig. 7 is a cross-sectional view of a speaker 100 according to another embodiment of the present application. In another embodiment, in order to increase the contact area between the voice coil 20 and the diaphragm assembly 10, so that the voice coil 20 and the diaphragm assembly 10 are fixedly bonded, the first end of the inner sub-voice coil 22, which is flush with the outer sub-voice coil 21, is fixedly connected to the diaphragm assembly 10, and the second end of the inner sub-voice coil 22 extends into the vibration space S.

Referring to fig. 3 again, in an embodiment of the present application, the diaphragm assembly 10 includes a diaphragm 11 and a dome 12, the diaphragm includes a folded ring 111 and a flat membrane 112 surrounded by the folded ring 111, the dome 12 is laminated on one side (outer side) of the flat membrane 112, and the voice coil 20 is located on one side (inner side) of the flat membrane 112 away from the dome and is fixedly connected to the flat membrane 112. Specifically, the flat film 112 is divided into an inner flat film and an outer flat film by the fold 111. The fold 111 is arranged around the dome 12. The voice coil 20 is fixedly connected to the inner flat membrane periphery. Wherein the dome 12 may be planar. In the present embodiment, the diaphragm 11 is hollow, that is, the diaphragm 11 is a ring-shaped diaphragm. In other embodiments, the diaphragm 11 may be a complete continuous diaphragm, which is not limited herein.

In some embodiments, the loudspeaker 100 further comprises a frame 40 and a magnetic bowl 50 for supporting the diaphragm assembly 10 and fixing the magnetic circuit system 30. The frame 40 includes a first side surface 41 and a second side surface 42 opposite to the first side surface 41, the diaphragm group 10 is fixed at its periphery to the first side surface 41, and the magnetic circuit system 30 and the magnetic bowl 50 are mounted on the second side surface 42. Specifically, the outer flat film of the diaphragm 111 is attached to the first side surface 41, the voice coil 20 extends into the accommodating space 43, and the outer magnetic conductive plate 34 is located on the second side surface 42, surrounds the outside of the voice coil 20, and is fixedly connected to the second side surface 42 of the frame 40. The outer magnet 32 is mounted on the surface of the outer magnetic conductive plate 34 and spaced from the voice coil 20, and the outer magnetic conductive plate 34 and the outer magnet 32 are fixed by adhesion. The inner magnet 31 and the inner magnetic conductive plate 33 are sequentially stacked and fixed on the magnetic bowl 50, and the magnetic bowl 50 is installed from the second side surface 42 of the frame 40 and fixed with the outer magnet 32 in an adhesion manner, so that the inner magnetic conductive plate 33 extends into the voice coil 20 and is arranged at an interval with the voice coil 20. The inner magnet 31 and the inner magnetic conductive plate 33 may be sequentially stacked on the magnetic bowl 50 in an adhesive manner.

It will be appreciated that, in order to electrically connect the speaker 100 to a circuit board in the electronic device 200, the voice coil 20 is provided with leads (not shown) for electrically connecting the voice coil 20 to a power source, such as a power supply system of a computer, for example, a battery. The electrical connection includes direct electrical connection or electrical connection between the lead and the power source through other manners, for example, the lead may be connected to the power source through a circuit board (specific power supply circuit). In some embodiments, the voice coil 20 may have leads respectively disposed on two opposite sides, wherein the two opposite sides may be an outer side or an inner side of the voice coil 20, depending on actual design requirements. In addition, in the embodiment of the present application, since the voice coil 20 includes the outer sub voice coil 21 and the inner sub voice coil 22, the lead may be a lead led out from the outer sub voice coil 21, or a lead led out from the inner sub voice coil 22, of course, one of the leads may be led out from the outer sub voice coil 21, and the other lead may be led out from the inner sub voice coil 22, and the specific lead leading-out manner is not limited herein.

The speaker 100 that provides in the embodiment of this application, because voice coil 20 includes outer sub voice coil 21 and laminate in the inner sub voice coil 22 that the inner wall of outer sub voice coil 21 set up, just inner sub voice coil 22 is followed central axis O direction size is greater than outer sub voice coil 21 is followed the size of central axis O direction, inner sub voice coil 22 be used for with vibrating diaphragm group fixed mounting, promptly inner sub voice coil 22 is equivalent to the effect of skeleton for with vibrating diaphragm group fixed mounting, nevertheless because inner sub voice coil 22 is a part of voice coil 20, can make inner sub voice coil 22, simple process in one shot forming when preparation voice coil 20. Further, because the inner sub voice coil 22 and the outer sub voice coil 21 are manufactured at the same time and formed at one time, the adaptability is better, and the problem that the reliability is affected due to poor adaptability can be further avoided. In addition, the force balance and sensitivity of the voice coil 20 in the magnetic circuit system 30 can be improved by adjusting the wire of the inner sub-voice coil 22.

It should be noted that the application of the voice coil 20 in the embodiment of the present application to the speaker 100 is only an application example, and it is obvious that the voice coil 20 may also be applied to other structures, for example, a camera, an earphone, and other elements including the voice coil, and is not limited to the speaker 100 including the voice coil.

The foregoing is an implementation of the embodiments of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the embodiments of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.

Claims

1. A voice coil, comprising:

an outer sub-voice coil; and

the inner sub voice coil is attached to the inner wall of the outer sub voice coil; the outer sub voice coil and the inner sub voice coil are arranged on the same central axis, the inner sub voice coil is larger than the outer sub voice coil in the direction of the central axis in size, and the inner sub voice coil is fixedly connected with a vibrating diaphragm group of the loudspeaker.

2. The voice coil of claim 1, wherein the outer sub-voice coil and the inner sub-voice coil each include a first end in the direction of the central axis; the first end of the inner sub-voice coil and the first end of the outer sub-voice coil are flush.

3. The voice coil according to claim 1 or 2, wherein a radial thickness of the inner sub-voice coil in a direction perpendicular to the central axis is smaller than a radial thickness of the outer sub-voice coil in a direction perpendicular to the central axis.

4. A loudspeaker is characterized by comprising a diaphragm group, a voice coil and a magnetic circuit system; the diaphragm group and the voice coil are arranged on the same central axis; the voice coil is at least partially positioned in the magnetic circuit system, and under the action of the magnetic field, the vibration of the voice coil provides driving force for the diaphragm group so as to enable the diaphragm group to sound; the voice coil includes:

an outer sub-voice coil; and

5. The loudspeaker of claim 4, wherein the outer sub-voice coil and the inner sub-voice coil each include a first end in the direction of the central axis; the first end of the inner sub voice coil and the first end of the outer sub voice coil are flush.

6. A loudspeaker according to claim 4 or 5, wherein the radial thickness of the inner sub-voice coil perpendicular to the direction of the central axis is smaller than the radial thickness of the outer sub-voice coil perpendicular to the direction of the central axis.

7. The loudspeaker of claim 5, wherein the magnetic circuit system comprises an inner magnet, an outer magnet, an inner magnetic conductive plate, an outer magnetic conductive plate, and a vibration space; the inner magnetic conductive plate and the inner magnet are sequentially stacked, and the outer magnetic conductive plate and the outer magnet are sequentially stacked; the outer magnetic conduction plate is positioned at the periphery of the inner magnetic conduction plate, and the outer magnetic conduction plate and the inner magnetic conduction plate are spaced by the vibration space; the outer magnets are positioned on the periphery of the inner magnets, and the outer magnets and the inner magnets are spaced through the vibration space; the voice coil is located in the vibration space and surrounds the periphery of the inner magnetic conducting plate and part of the inner magnets.

8. The loudspeaker of claim 7 wherein said first end of said inner sub-voice coil and said outer sub-voice coil being flush extends into said vibration space; or the first end of the inner sub voice coil and the first end of the outer sub voice coil which are flush are fixedly connected with the vibrating diaphragm group.

9. The loudspeaker of claim 7, further comprising a frame and a magnetic bowl for supporting the diaphragm group and fixing the magnetic circuit system; the frame comprises a first side surface and a second side surface opposite to the first side surface; the periphery of the diaphragm group is fixed on the first side surface; the magnetic bowls are positioned on the second side surface, and the magnetic conduction plates and the outer magnets are sequentially stacked and positioned between the basin frame and the magnetic bowls; the inner magnet and the inner magnetic conductive plate are sequentially stacked and fixed on the magnetic bowl, and the inner magnetic conductive plate extends into the voice coil and is arranged at an interval with the voice coil.

10. The loudspeaker of claim 4, wherein the diaphragm set comprises a diaphragm sheet and a dome, the diaphragm sheet comprising a corrugated rim and a flat membrane surrounded by the corrugated rim; the dome is laminated to one side of the flat film; the voice coil is located on one side, away from the dome, of the flat membrane and is fixedly connected with the flat membrane.

11. A portable electronic device comprising a housing and a speaker according to any of claims 4-10; the casing includes sound chamber and phonate hole, the speaker accept in the sound chamber and with the sound chamber forms the sound conduction passageway, the phonate hole intercommunication sound conduction passageway and external world.