CN220965150U

CN220965150U - Sound generating device and electronic equipment

Info

Publication number: CN220965150U
Application number: CN202322786440.1U
Authority: CN
Inventors: 蒋羽; 郭翔
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2023-10-17
Filing date: 2023-10-17
Publication date: 2024-05-14
Anticipated expiration: 2033-10-17

Abstract

The utility model belongs to the technical field of electroacoustic conversion equipment, and particularly relates to a sound generating device and electronic equipment. The first aspect of the present utility model provides a sound generating device, the sound generating device includes a vibration system and a magnetic circuit, the vibration system includes a voice coil and a centering support assembly connected with the voice coil, the voice coil includes a first side portion provided with a lead wire and a second side portion far away from the first side portion, the centering support assembly includes a first centering support and a second centering support which are disposed opposite to each other, wherein the first centering support is connected with the first side portion, the second centering support is connected with the second side portion, the first centering support is provided with a conductive structure, the conductive structure is electrically connected with the lead wire, the magnetic circuit has a magnetic gap, one side of the voice coil is opposite to the magnetic gap, and the magnetic circuit is configured to make a driving force received by the second side portion greater than a driving force received by the first side portion. According to the sound generating device provided by the utility model, the occurrence of polarization phenomenon can be reduced.

Description

Sound generating device and electronic equipment

Technical Field

The utility model belongs to the technical field of electroacoustic conversion equipment, and particularly relates to a sound generating device and electronic equipment.

Background

The sounder system generally consists of a vibration system, a magnetic circuit system and an auxiliary system, wherein the magnetic circuit system is used for providing a magnetic field; the vibration system comprises a vibrating diaphragm and a voice coil, wherein the voice coil can vibrate under the action of a magnetic field and an electric field, and then the vibrating diaphragm can be driven to vibrate and sound. In order to assist the voice coil to vibrate, a centering support piece is further arranged in the vibration system of part of the product, the centering support piece can be used for supporting the voice coil to vibrate so as to prevent the voice coil from sounding and polarizing, and meanwhile, a lead wire of the voice coil can be connected with an external power supply through a conductive structure on the centering support piece.

Wherein, partial products are in order to reduce the cost, the centering support piece includes the pad side that is connected with the lead wire, and the non-pad side that is not connected with the lead wire in an electrically conductive way. Because the pad side is equipped with conductive structure, its weight is greater than the weight of non-pad side, and the wire winding number of turns of the lead wire side of voice coil loudspeaker voice coil draws forth in addition is more than the wire winding number of turns of non-lead wire side to because of the difference of both sides weight and atress when leading to the voice coil loudspeaker voice coil vibration, and the both sides amplitude asymmetry appears, leads to polarization phenomenon's production, and then influences the sound production effect of sound generator.

Disclosure of utility model

The utility model aims to at least solve the problem of polarization phenomenon caused by asymmetric centering support plate structure. This object is achieved by:

A first aspect of the present utility model proposes a sound emitting device comprising:

the vibration system comprises a voice coil and a centering support piece assembly connected with the voice coil, wherein the voice coil comprises a first side part provided with a lead wire and a second side part far away from the first side part, the centering support piece assembly comprises a first centering support piece and a second centering support piece which are oppositely arranged, the first centering support piece is connected with the first side part, the second centering support piece is connected with the second side part, the first centering support piece is provided with a conductive structure, and the conductive structure is electrically connected with the lead wire;

And a magnetic circuit system having a magnetic gap, one side of the voice coil being opposite to the magnetic gap, the magnetic circuit system being configured such that a driving force received by the second side is greater than a driving force received by the first side.

According to the sound production device, the first centering support piece is provided with the conductive structure, and compared with the second centering support piece, the weight of the first centering support piece is larger, so that when the first side part and the second side part are subjected to the magnetic field force with the same intensity, the vibration amplitude of the first side part and the first centering support piece connected with the first side part is larger than that of the second side part and the second centering support piece connected with the second side part, the magnetic circuit system is arranged, the driving force received by the second side part is larger than that received by the first side part, namely, the magnetic field intensity corresponding to the second side part is adjusted to be larger than that corresponding to the first side part, and the vibration amplitude of the second centering support piece and the second side part is improved, so that the vibration amplitude similar to that of the first side part and the first centering support piece is achieved, and the polarization phenomenon is reduced.

In addition, the sound generating device according to the present utility model may further have the following additional technical features:

In some embodiments of the present utility model, the magnetic circuit system includes a first side magnet and a second side magnet, the first side magnet and the first centering support are disposed on one side of the voice coil together, the second side magnet and the second centering support are disposed on the other side of the voice coil together, and a magnetic energy product of the second side magnet is larger than a magnetic energy product of the first side magnet.

In some embodiments of the utility model, the second side magnet has a volume greater than the volume of the first side magnet.

In some embodiments of the present utility model, the first centering support includes two first connection portions spaced apart along a first direction, the first connection portions are connected to the first side portions, the first side magnet is disposed between the two first connection portions, the second centering support includes two second connection portions spaced apart along the first direction, the second connection portions are connected to the second side portions, the second side magnet is disposed between the two second connection portions, and a length dimension of the second side magnet is greater than a length dimension of the first side magnet along the first direction, and the first direction includes a long axis direction or a short axis direction of the magnetic circuit.

In some embodiments of the utility model, a minimum pitch dimension between two of the second connection portions is greater than a minimum pitch dimension between two of the first connection portions along the first direction.

In some embodiments of the present utility model, the first direction is a short axis direction of the magnetic circuit, and the first centering support and the second centering support are respectively disposed at two sides of the long axis direction of the magnetic circuit.

In some embodiments of the present utility model, the voice coil includes two short sides disposed opposite to each other along a long axis direction of the magnetic circuit, and further includes two long sides disposed opposite to each other along a short axis direction of the magnetic circuit, and the lead wire is led out from one short side and electrically connected to the conductive structure.

In some embodiments of the present utility model, the conductive structure includes a tab provided on a surface of the first stator pole facing the voice coil, and the lead is electrically connected to the tab.

In some embodiments of the present utility model, the magnetic circuit system further includes a center magnet, the first side magnet and the second side magnet are respectively spaced from the center magnet and form the magnetic gap, and an end of the voice coil is inserted into the magnetic gap.

The second aspect of the present utility model also proposes an electronic device having the sound emitting apparatus of any one of the above.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present utility model more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. Wherein:

FIG. 1 is a schematic diagram of a sound generating apparatus according to an embodiment of the present application;

FIG. 2 is a schematic view of the sound emitting device of FIG. 1 with the yoke removed;

FIG. 3 is an exploded view of the sound emitting device of FIG. 1;

FIG. 4 is a schematic view of a cross-section A-A of the sound emitting device of FIG. 1;

FIG. 5 is a schematic structural view of the first centering strut of FIG. 2;

fig. 6 is a schematic structural view of the second centering support in fig. 2.

The reference numerals in the drawings are as follows:

100. A sound producing device;

10. a housing; 11. a housing body; 12. an end cap; 13. a yoke; 14. a dust cover;

20. A vibration system; 21. a voice coil; 211. a lead wire; 221. a first centering support; 2211. a first body portion; 2212. a first connection portion; 2213. a soldering lug; 222. a second centering support; 2221. a second body portion; 2222. a second connecting portion; 23. a vibrating diaphragm; 24. a reinforcing layer;

30. A magnetic circuit system; 31. a center magnet; 32. a first side magnet; 33. a second side magnet; 34. a third side magnet; 35. a fourth magnet; 36. a central magnetically permeable plate.

Detailed Description

Exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, in the context of this specification, when an element is referred to as being "on" another element, it can be directly on the other element or be indirectly on the other element with one or more intervening elements interposed therebetween. Also, in the context of this specification, when an element is referred to as being "connected" or "coupled" or "attached" to another element, it can be directly connected or coupled or attached to the other element or be indirectly connected, coupled or attached to the other element with one or more intervening elements interposed therebetween. In addition, when an element is referred to as being "engaged" with another element, it can be directly engaged or contacted with the other element or be indirectly engaged or contacted with the other element with one or more intervening elements interposed therebetween.

Spatially relative terms, such as "inner," "outer," "lower," "upper," and the like, may also be used herein to describe one element's or feature's relationship to another element's or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Accordingly, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

In order to solve the problem of polarization phenomenon caused by asymmetric centering support sheet structures, the utility model provides a sound generating device and electronic equipment with the sound generating device, wherein the electronic equipment can be a mobile phone, a tablet personal computer, an AR or VR and other intelligent equipment, and the sound generating device can be a loudspeaker of the electronic equipment. The sound generating device and the electronic equipment with the sound generating device can enable the side, provided with the lead wire, of the voice coil and the side, not provided with the lead wire, of the voice coil to achieve the same or approximately the same vibration amplitude, so that sound generation of polarization phenomenon is reduced.

Referring to fig. 1 to 4, in some embodiments of the present utility model, a sound generating apparatus 100 includes a vibration system 20 and a magnetic circuit 30, the vibration system 20 includes a voice coil 21 and a centering pad assembly connected to the voice coil 21, the voice coil 21 includes a first side portion provided with a lead 211 and a second side portion remote from the first side portion, the centering pad assembly includes a first centering pad 221 and a second centering pad 222 disposed opposite to each other, wherein the first centering pad 221 is connected to the first side portion, the second centering pad 222 is connected to the second side portion, and the first centering pad 221 is provided with a conductive structure electrically connected to the lead 211, the magnetic circuit 30 has a magnetic gap, one side of the voice coil 21 is opposite to the magnetic gap, and the magnetic circuit 30 is configured such that a driving force received by the second side portion is greater than a driving force received by the first side portion.

Specifically, the sound generating device 100 includes a housing 10, and the vibration system 20 and the magnetic circuit system 30 are respectively disposed inside the housing 10 and connected to the housing 10. The vibration system 20 comprises a voice coil 21 and a vibrating diaphragm 23, the voice coil 21 is connected with an external power supply through a lead 211, and the voice coil 21 in an electrified state can reciprocate along the axial direction of the voice coil under the action of the magnetic field force of the magnetic circuit system 30 and drive the vibrating diaphragm 23 to vibrate and sound. One end of the voice coil 21 in the axial direction is connected with the diaphragm 23, and the other end of the voice coil 21 in the axial direction is inserted into the magnetic circuit system and receives the magnetic force.

In order to improve stability when the voice coil 21 vibrates, one end of the voice coil 21, which is inserted into the magnetic circuit system, is also connected with a centering support piece assembly, and the centering support piece assembly is used for supporting the voice coil 21 to vibrate along the axial direction of the voice coil. The centering support piece assembly comprises a first centering support piece 221 and a second centering support piece 222 which are oppositely arranged, the first centering support piece 221 is connected with the first side part, and the second centering support piece 222 is connected with the second side part, so that the stress balance of the voice coil 21 is ensured. The first centering support 221 is provided with a conductive structure, and the lead 211 can be connected to an external power source through the conductive structure, thereby supplying power to the voice coil 21.

According to the sound generating device 100 of the present utility model, since the first centering piece 221 is provided with the conductive structure, the weight of the first centering piece 221 is larger than that of the second centering piece 222, so that when the first side portion and the second side portion are subjected to the magnetic field force with the same intensity, the vibration amplitude of the first side portion and the first centering piece 221 connected with the first side portion is larger than that of the second side portion and the second centering piece 222 connected with the second side portion, by providing the magnetic circuit system 30, the magnetic circuit system 30 is configured such that the driving force received by the second side portion is larger than that received by the first side portion, that is, the magnetic field intensity corresponding to the second side portion is adjusted to be larger than that corresponding to the first side portion, thereby improving the vibration amplitude of the second centering piece 222 and the second side portion, achieving the vibration amplitude similar to that of the first side portion and the first centering piece 221, and further reducing the occurrence of polarization phenomenon.

As shown in fig. 1 to 4, in some embodiments of the present utility model, since the first side portion is provided with the lead wire, the number of turns of the voice coil wire of the first side portion is more than half of the number of turns of the voice coil wire of the second side portion, and according to the magnetic field force formula BIL, when the first side portion and the second side portion are subjected to the magnetic field strength of the same strength, the magnetic field force of the first side portion is greater than the magnetic field force of the second side portion, the vibration amplitude of the first side portion and the first centering support 221 connected thereto is greater than the vibration amplitude of the second side portion and the second centering support 222 connected thereto, and the magnetic circuit system 30 is configured such that the driving force of the second side portion is greater than the driving force of the first side portion, that is, the magnetic field strength of the second side portion is adjusted to be greater than the magnetic field strength of the first side portion, thereby increasing the vibration amplitude of the second centering support 222 and the second side portion to the vibration amplitude similar to the first side portion and the first centering support 221, and further reducing the occurrence of polarization phenomenon.

As shown in connection with fig. 1 to 4, in some embodiments of the present utility model, the case 10 includes a case body 11, an end cap 12, and a yoke 13. Wherein, the shell body 11 encloses into the whole frame structure of the shell 10, and the shell body 11 is opened along the axial two ends of the voice coil 21, and the vibrating diaphragm 23 is connected with one end of the shell body 11 and is used for blocking the opening of one end. The end cover 12 is connected with one end of the shell body 11 provided with the vibrating diaphragm 23 and is used for covering the outside of the vibrating diaphragm 23, so that the vibrating diaphragm 23 is prevented from being damaged due to external impact. Meanwhile, the end cap 12 is provided with a plurality of sound emitting holes, and sound generated when the diaphragm 23 vibrates can be transmitted to the outside of the case 10 through the sound emitting holes. Meanwhile, the end cover 12 is further provided with a dust cover 14 for preventing external dust from falling into the shell 10 through the sound outlet, so that the influence of the dust on the vibration of the vibrating diaphragm 23 is reduced. The yoke 13 is connected to the other end of the case body 11 and is used to close the opening at the other end. The magnetic circuit 30 may be fixed to the yoke 13, and the magnetic field strength of the magnetic circuit 30 may be increased by the yoke 13.

In some embodiments of the present utility model, the vibration system 20 further includes a reinforcing layer 24, wherein an opening is provided at the center of the diaphragm 23, and the reinforcing layer 24 is connected to the diaphragm 23 and is used for blocking the opening at the center, and for improving the strength and modulus of the diaphragm 23, so as to meet the sound production requirement of the diaphragm 23.

As shown in fig. 1 to 4, in some embodiments of the present utility model, the magnetic circuit system 30 includes a first side magnet 32 and a second side magnet 33, the first side magnet 32 and the first centering support 221 are disposed on one side of the voice coil 21 together, the second side magnet 33 and the second centering support 222 are disposed on the other side of the voice coil 21 together, and the magnetic energy product of the second side magnet 33 is larger than the magnetic energy product of the side magnet 32.

The magnetic energy product is the product of B and H at any point on the demagnetization curve, namely BH, and is one of important parameters for measuring the energy stored in the magnet. The larger the magnetic energy product, the greater the magnetic field strength that the magnet can provide.

Since the first side magnet 32 and the first centering support 221 are disposed on one side of the voice coil 21, the second side magnet 33 and the second centering support 222 are disposed on the other side of the voice coil 21, that is, the first side magnet 32 is disposed on the side of the first side portion, and the second side magnet 33 is disposed on the side of the second side portion. Therefore, the influence of the magnetic field strength of the first side magnet 32 on the vibration amplitude of the first side portion is larger than the influence of the magnetic field strength of the second side magnet 33 on the vibration amplitude of the first side portion, and the influence of the magnetic field strength of the second side magnet 33 on the vibration amplitude of the second side portion is larger than the influence of the first side magnet 32 on the vibration amplitude of the second side portion. By setting the magnetic energy product of the second side magnet 33 to be larger than that of the first side magnet 32, the vibration amplitude of the second side portion can be increased, so that the second side portion can reach a vibration amplitude similar to that of the first side portion, and the occurrence of polarization can be reduced.

As shown in connection with fig. 1-4, in some embodiments of the present utility model, the volume of the second side magnet 33 is greater than the volume of the first side magnet 32.

Specifically, the magnets of the same material are generally used for the first side magnet 32 and the second side magnet 33, and the larger the volume is, the larger the magnetic energy product can be provided.

As shown in fig. 1 to 4, in some embodiments of the present utility model, the first centering support 221 includes two first connection portions 2212 spaced apart along a first direction, the first connection portions 2212 are connected to the first side portions, the first side magnet 32 is disposed between the two first connection portions 2212, the second centering support 222 includes two second connection portions 2222 spaced apart along the first direction, the second connection portions 2222 are connected to the second side portions, the second side magnet 33 is disposed between the two second connection portions 2222, and a length dimension of the second side magnet 33 is greater than a length dimension of the first side magnet 32 along the first direction, which includes a long axis direction or a short axis direction of the magnetic circuit system 30.

Specifically, the first direction may be a long axis direction or a short axis direction of the magnetic circuit system 30. The size of the magnetic circuit 30 in the long axis direction is larger than the size of the magnetic circuit 30 in the short axis direction. In some embodiments of the present application, the first direction is the short axis direction of the magnetic circuit 30, and the first centering support 221 and the second centering support 222 are respectively disposed on both sides of the long axis direction of the magnetic circuit 30. As shown in fig. 2, the second side magnet 33 has a length dimension L2 along the first direction, and the first side magnet 32 has a length dimension L1 along the first direction, wherein L2 is greater than L1. By providing the second side magnet 33 with a longer length than the first side magnet 32 in the first direction, the magnetic energy product of the second side magnet 33 can be made larger than the magnetic energy product of the first side magnet 32 by providing the second side magnet 33 with a larger volume than the first side magnet 32 when the width of the first side magnet 32 and the width of the second side magnet 33 are identical.

The method of adjusting the magnetic energy product of the first side magnet 32 and the second side magnet 33 is not limited to the volume of the magnets, but may be selected and set according to the actual use requirement by adjusting the magnetizing saturation of the first side magnet 32 and the second side magnet 33, the number of magnets, and the like, and the present utility model is not limited thereto.

As shown in connection with fig. 1 to 4, in some embodiments of the present utility model, a minimum pitch size between two second connection portions 2222 is greater than a minimum pitch size between two first connection portions 2212 in the first direction.

Specifically, as shown in fig. 2, the minimum pitch size between the two second connection portions 2222 is H2, and the minimum pitch size between the two first connection portions 2212 is H1, where H2 is greater than H1. By setting the minimum pitch size between the two second connection portions 2222 to be larger than the minimum pitch size between the two first connection portions 2212, the pitch size between the two second connection portions 2222 is facilitated to be increased, thereby facilitating setting the length size of the second side magnet 33 in the first direction to be larger than the length size of the first side magnet 32 in the first direction.

As shown in fig. 1 to 4, in some embodiments of the present utility model, the voice coil 21 includes two short sides disposed opposite to each other along the long axis direction of the magnetic circuit 30, and the voice coil 21 further includes two long sides disposed opposite to each other along the short axis direction of the magnetic circuit, and the lead wire 211 is led out from one short side and electrically connected to the conductive structure.

Since the first centering support 221 and the second centering support 222 are respectively disposed at two sides of the magnetic circuit 30 in the long axis direction, and the two short sides of the voice coil 21 are respectively disposed opposite to each other along the long axis direction of the magnetic circuit 30, the length of the lead 211 is reduced by leading the lead 211 out from one short side, so that the quality difference between the first side and the second side is reduced, and the length of the second side magnet 33 along the short axis direction of the magnetic circuit 30 is reduced.

As shown in connection with fig. 1 to 5, in some embodiments of the present utility model, the conductive structure includes a tab 2213, the tab 2213 is disposed on a surface of the first positioning support 221 facing the voice coil 21, and the lead 211 is electrically connected to the tab 2213.

Specifically, the side of the first centering support 221 facing the voice coil 21 is used for connecting with the voice coil 21, and the specific connection mode may be adhesive bonding, meanwhile, the side of the first centering support 221 facing the voice coil 21 is further provided with a soldering lug 2213, and the soldering lug 2213 is electrically connected with the lead 211. The first centering clip 221 includes a first body portion 2211 and a first connection portion 2212, and the soldering tab 2213 may completely cover the first body portion 2211 and the first connection portion 2212. Or the tab may cover only a partial structure of the first body portion 2211 or only a partial structure of the first connection portion 2212.

As shown in connection with fig. 1 to 6, in some embodiments of the present utility model, the second centering support 222 includes a second body portion 2221 and a second connection portion 2222, wherein the second body portion 2221 is connected to the housing 10, a side of the second connection portion 2222 facing the voice coil 21 is used for connection to the voice coil 21, and the specific connection manner may be adhesive bonding, and the second body portion 2221 and the second connection portion 2222 have no tab structure, so that the mass of the second centering support 222 is smaller than that of the first centering support 221.

As shown in fig. 1 to 4, in some embodiments of the present utility model, the magnetic circuit system 30 further includes a center magnet 31, and a first side magnet 32 and a second side magnet 33 are respectively spaced apart from the center magnet 31 and form a magnetic gap, and one end of the voice coil 21 is inserted into the magnetic gap.

Specifically, the first side magnet 32 and the second side magnet 33 are provided on both sides of the center magnet 31 in the longitudinal direction of the magnetic circuit 30, respectively, and form magnetic gaps between the center magnets 31, respectively. One end of the voice coil 21, which is far away from the vibrating diaphragm 23, is inserted into the magnetic gap and is connected with the first centering support piece 221 and the second centering support piece 222.

As shown in fig. 1 to 4, in some embodiments of the present utility model, the magnetic circuit system 30 further includes a third side magnet 34 and a fourth side magnet 35, and the third side magnet 34 and the fourth side magnet 35 are respectively disposed on both sides of the center magnet 31 along the short axis direction of the magnetic circuit system 30, and form magnetic gaps between the center magnets 31, respectively, so as to enhance the magnetic field strength of the magnetic circuit system 30. In some embodiments of the present utility model, the magnetic circuit system 30 further includes a central magnetic conductive plate 36, and the central magnetic conductive plate 36 is connected to a surface of the central magnet 31 facing away from the yoke 13, so as to increase the magnetic field strength of the magnetic circuit system 30.

The second aspect of the present utility model also proposes an electronic device (not shown in the drawings) having the sound emitting apparatus 100 of any of the above embodiments. The electronic device may be a mobile phone, a tablet computer, an AR or VR and other intelligent devices, and the sound generating apparatus 100 may be a speaker of the electronic device. By using the electronic device of the present utility model, the same or nearly the same vibration amplitude can be achieved on the side of the voice coil 21 on which the lead 211 is provided and the side on which the lead is not provided, and thus the sound emission of the polarization phenomenon can be reduced.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. A sound emitting device, comprising:

2. The sound generating apparatus according to claim 1, wherein the magnetic circuit system includes a first side magnet and a second side magnet, the first side magnet and the first centering support are disposed on one side of the voice coil together, the second side magnet and the second centering support are disposed on the other side of the voice coil together, and a magnetic energy product of the second side magnet is larger than a magnetic energy product of the first side magnet.

3. The sound emitting apparatus of claim 2 wherein the volume of the second side magnet is greater than the volume of the first side magnet.

4. The sound generating apparatus according to claim 3, wherein the first centering piece includes two first connection portions provided at intervals along a first direction, the first connection portions are connected with the first side portions, the first side magnet is provided between the two first connection portions, the second centering piece includes two second connection portions provided at intervals along the first direction, the second connection portions are connected with the second side portions, the second side magnet is provided between the two second connection portions, and a length dimension of the second side magnet is larger than a length dimension of the first side magnet along the first direction, and the first direction includes a long axis direction or a short axis direction of the magnetic circuit.

5. The sound emitting apparatus of claim 4 wherein the minimum spacing dimension between the two second connection portions is greater than the minimum spacing dimension between the two first connection portions in the first direction.

6. The sound generating apparatus according to claim 4, wherein the first direction is a short axis direction of the magnetic circuit, and the first centering support and the second centering support are provided on both sides of a long axis direction of the magnetic circuit, respectively.

7. The sound generating apparatus of claim 6, wherein the voice coil comprises two short sides disposed opposite to each other along a long axis direction of the magnetic circuit, and further comprising two long sides disposed opposite to each other along a short axis direction of the magnetic circuit, and the lead wire is led out from one short side and electrically connected to the conductive structure.

8. The sound emitting apparatus of claim 4, wherein the conductive structure comprises a tab disposed on a surface of the first stator pole facing the voice coil, and the lead is electrically connected to the tab.

9. The sound generating apparatus according to claim 2, wherein the magnetic circuit system further comprises a center magnet, the first side magnet and the second side magnet are disposed at intervals from the center magnet, respectively, and the magnetic gap is formed, and an end portion of the voice coil is inserted into the magnetic gap.

10. An electronic device characterized by having the sound emitting apparatus according to any one of claims 1 to 9.