CN114554367A

CN114554367A - Sound production device and electronic equipment

Info

Publication number: CN114554367A
Application number: CN202111680960.3A
Authority: CN
Inventors: 蔡晓东; 刘松
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2021-04-01
Filing date: 2021-12-30
Publication date: 2022-05-27
Anticipated expiration: 2041-12-30
Also published as: CN216775010U; CN114554368A; CN114554369B; CN114554367B; CN114554368B; WO2022206048A1; CN113099365A; CN114554369A

Abstract

The invention discloses a sound generating device and an electronic device, wherein the sound generating device comprises a shell, a first vibration system, a second vibration system and a magnetic circuit system. The first vibration system comprises a first diaphragm and two first voice coils. The second vibration system comprises a second diaphragm and two second voice coils. The magnetic circuit system includes two first center magnets, two second center magnets, a first yoke plate to which the second center magnets are connected, and a second yoke plate to which the first center magnets are connected. The two first central magnets and the two second central magnets are sequentially and alternately arranged along the circumferential direction. The peripheral side of the first central magnet forms a first magnetic gap for the first voice coil to extend into. The peripheral side of the second central magnet forms a second magnetic gap for the second voice coil to extend into. The first central magnet and the second central magnet are flatly arranged between the first yoke plate and the second yoke plate, and at least one of the first yoke plate and the second yoke plate is connected with the shell. According to the technical scheme, the thickness of the sound generating device can be reduced while double-sided sound generation is realized.

Description

Sound production device and electronic equipment

The present invention claims priority from chinese patent application No. 202110358638.2 entitled "sound emitting device and electronic device" filed on 4/1/2021, the contents of which are incorporated herein by reference.

Technical Field

The present invention relates to the field of acoustic energy conversion technologies, and in particular, to a sound generating device and an electronic apparatus.

Background

In the current double-sided sound production device, a support plate is usually used to support the central magnetic circuit assembly, that is, a central magnet is respectively disposed at two opposite sides of the support plate, a magnetic gap is formed at the periphery of each central magnet, and the voice coils at two sides respectively extend into the two magnetic gaps. However, in such an arrangement, in order to ensure that the depth of each magnetic gap can meet the requirement of the operation of the corresponding voice coil, the thickness of each central magnet needs to be relatively large, that is, in the double-sided sound production device, the thickness of one central magnet is increased, which results in the increase of the thickness of the double-sided sound production device, and is very unfavorable for the miniaturization of the product.

Disclosure of Invention

The invention mainly aims to provide a sound generating device, which aims to reduce the thickness of the sound generating device while realizing double-sided sound generation.

In order to achieve the above object, the present invention provides a sound generating device, including:

a housing;

the first vibration system comprises a first vibrating diaphragm and two first voice coils arranged on the first vibrating diaphragm;

the second vibration system comprises a second vibrating diaphragm and two second voice coils arranged on the second vibrating diaphragm; and the number of the first and second groups,

the magnetic circuit system comprises two first central magnets, two second central magnets, a first yoke plate with magnetic permeability and a second yoke plate, wherein the first yoke plate and the second yoke plate are arranged between the first vibrating diaphragm and the second vibrating diaphragm in parallel; wherein,

the two first central magnets and the two second central magnets are sequentially and alternately arranged along the circumferential direction of the first diaphragm, a first magnetic gap for the first voice coil to extend into is formed on the circumferential side of each first central magnet, one side, away from the first diaphragm, of each first central magnet is connected to the second yoke plate, a second magnetic gap for the second voice coil to extend into is formed on the circumferential side of each second central magnet, and one side, away from the second diaphragm, of each second central magnet is connected to the first yoke plate;

the first and second central magnets are disposed in a flat arrangement between the first and second yoke plates, at least one of the first and second yoke plates being connected to the housing.

Optionally, a first conductive part is arranged between the two first voice coils, so that the two first voice coils are connected in series; and/or the presence of a gas in the gas,

and a second conductive part is arranged between the two second voice coils so as to enable the two second voice coils to be connected in series.

Optionally, the two first voice coils are wound by the same first wire, and the first conductive part is a part of the first wire for connecting the two first voice coils; and/or the presence of a gas in the gas,

the two second voice coils are obtained by winding the same second conducting wire, and the second conducting part is a part of the second conducting wire used for connecting the two second voice coils.

Optionally, the first conductive part is a first flexible circuit board, and two ends of the first flexible circuit board are electrically connected to the two first voice coils respectively; and/or the presence of a gas in the gas,

the second conductive part is a second flexible circuit board, and two ends of the second flexible circuit board are respectively electrically connected with the two second voice coils.

Optionally, the first conductive part is fixedly arranged on the first diaphragm; and/or the second conductive part is fixedly arranged on the second diaphragm;

and/or the first vibration system further comprises a first dome connected with the first diaphragm, and the first conductive part is fixedly arranged on the first dome; and/or the second vibration system further comprises a second dome connected with the second diaphragm, and the second conductive part is fixedly arranged on the second dome.

Optionally, the first diaphragm and/or the second diaphragm is a conductive diaphragm.

Optionally, the magnetic circuit system further comprises a fourth central magnet located between the two first central magnets and between the two second central magnets, the first central magnet and the fourth central magnet forming part of the first magnetic gap therebetween, and the second central magnet and the fourth central magnet forming part of the second magnetic gap therebetween.

Optionally, the first yoke plate includes a first support portion and a first connection portion connected to the first support portion, the first connection portion being connected to the housing, the first support portion extending in an arrangement direction of the two second central magnets, the two second central magnets being connected to the first support portion;

the second yoke plate includes a second support portion extending in an arrangement direction of the two first central magnets, the two first central magnets being connected to the second support portion;

the two first voice coils extend into the first magnetic gap from two opposite sides of the width direction of the first supporting part, and the two second voice coils extend into the second magnetic gap from two opposite sides of the width direction of the second supporting part.

Optionally, the first connection portion is annular, one end of the first support portion is connected to one side of the first connection portion, the other end of the first support portion is connected to the other side of the first connection portion, and two opposite sides of the first support portion in the width direction are spaced from the first connection portion so that the first voice coil can pass through the first support portion; and/or the presence of a gas in the gas,

the second supporting part further comprises a second connecting part, the second connecting part is annular and is connected with the shell, one end of the second supporting part is connected with one side of the second connecting part, the other end of the second supporting part is connected with the other side of the second connecting part, and two opposite sides of the second supporting part in the width direction are spaced from the second connecting part so as to allow the second voice coil to penetrate through.

Optionally, the magnetic circuit system further includes two first side magnets, any one of the first side magnets is disposed at an interval on a side of the first central magnet away from the other first central magnet and connected to the second support portion, the first yoke plate further includes a first side magnetic conductive plate connected to an inner side of the first connection portion and connected to a side of the first side magnet away from the second support portion; and/or the presence of a gas in the gas,

the magnetic circuit system further comprises two second side magnets, any one of the second side magnets is arranged on one side, away from the other second center magnet, of the second center magnet at intervals and is connected with the first supporting portion, the second yoke plate further comprises a second side magnetic conduction plate, and the second side magnetic conduction plate is connected to the inner side of the second connecting portion and is connected to one side, away from the first supporting portion, of the second side magnet.

Optionally, the first vibration system further includes a first stiffener, where the first stiffener includes a first stiffener connecting portion and two third supporting portions, the first stiffener connecting portion is connected to the housing, and each third supporting portion is connected to one of the first voice coils; and/or, the second vibration system still includes the centering piece of second, the centering piece of second includes second piece connecting portion and two fourth supporting parts, second piece connecting portion connect the casing, each the fourth supporting part connects one the second voice coil.

The invention also provides electronic equipment, which comprises the sound generating device; and

the sound-producing device comprises a shell, a sound-producing mechanism and a sound-emitting component, wherein the shell is provided with a mounting cavity and two sound-emitting parts, the sound-producing mechanism divides the mounting cavity into two sound-emitting cavities, a first vibrating diaphragm of the sound-producing mechanism is communicated with one of the sound-emitting parts through one of the sound-emitting cavities, and a second vibrating diaphragm of the sound-producing mechanism is communicated with the other sound-emitting part through the other sound-emitting cavity;

the electronic equipment is provided with a play mode and an earphone mode, in the play mode, a first vibration system and a second vibration system of the sound generating device radiate sound waves with the same phase outwards through the corresponding sound emitting parts, and in the earphone mode, the first vibration system and the second vibration system radiate sound waves with opposite phases outwards through the corresponding sound emitting parts.

In the technical scheme of the invention, the magnetic circuit system comprises a first central magnet, a second central magnet, a first yoke plate and a second yoke plate, wherein the first yoke plate and the second yoke plate are arranged between a first vibrating diaphragm and a second vibrating diaphragm in parallel, a first magnetic gap for a first voice coil to extend into is formed on the peripheral side of the first central magnet, one side of the first central magnet, which is deviated from the first vibrating diaphragm, is connected to the second yoke plate, a second magnetic gap for a second voice coil to extend into is formed on the peripheral side of the second central magnet, and one side of the second central magnet, which is deviated from the second vibrating diaphragm, is connected to the first yoke plate. By connecting at least one of the first yoke plate and the second yoke plate to the housing, the first center magnet and the second center magnet can be fixed in the housing. And through making first central magnet and second central magnet be the tiling setting between first yoke plate and second yoke plate, avoided the condition that first central magnet and second central magnet range upon range of setting, also avoided the condition in the direction of arranging of first vibrating diaphragm and second vibrating diaphragm sharing magnetic gap of first voice coil loudspeaker voice coil and second voice coil loudspeaker voice coil. Compared with the mode that the first central magnet and the second central magnet are stacked, the double-sided sound production device has the advantages that the thickness of the magnetic circuit system can be reduced while double-sided sound production is achieved, and further the thickness of the sound production device can be reduced. In addition, the magnetic circuit system comprises two first central magnets and two second central magnets, the two first central magnets and the two second central magnets are sequentially and alternately arranged along the circumferential direction of the first diaphragm, a first magnetic gap is formed on the circumferential side of each first central magnet, a second magnetic gap is formed on the circumferential side of each second central magnet, a first voice coil is arranged in the first vibration system corresponding to each first magnetic gap, and a second voice coil is arranged in the second vibration system corresponding to each second magnetic gap; the arrangement is that the first vibrating diaphragm of the first vibrating system is driven by the two first voice coils, and the second vibrating diaphragm of the second vibrating system is driven by the two second voice coils, so that the integral electroacoustic conversion efficiency of the sound generating device can be improved, a higher sound pressure level is provided, and the integral sound generating loudness of the sound generating device is favorably improved; and through arranging two first central magnets and two second central magnets in turn along the circumference of first vibrating diaphragm, can make arranging of magnetic circuit comparatively compact, be favorable to reducing sound generating mechanism's length.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a sound generating device according to an embodiment of the present invention;

FIG. 2 is an exploded view of the magnetic circuit system of FIG. 1;

FIG. 3 is a schematic structural view of the first stiffener shown in FIG. 1;

FIG. 4 is a schematic structural view of a second centering branch of FIG. 1;

FIG. 5 is a schematic structural diagram of a first vibration system of a sound generating device according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of another embodiment of the first vibration system of the sound generating apparatus of the present invention;

FIG. 7 is a schematic partial cross-sectional view of a first diaphragm of the first vibration system of FIG. 5;

FIG. 8 is a schematic structural diagram of an embodiment of a first conductive layer on the first diaphragm of FIG. 7;

FIG. 9 is a schematic structural diagram of another embodiment of a first conductive layer on the first diaphragm of FIG. 7;

FIG. 10 is a schematic structural diagram of a first conductive layer on the first diaphragm in FIG. 7 according to yet another embodiment;

FIG. 11 is a schematic structural diagram of a housing of a sound generating device according to an embodiment of the present invention;

FIG. 12 is an exploded view of the housing of FIG. 11;

FIG. 13 is a schematic structural diagram of an electronic device according to an embodiment of the invention;

fig. 14 is an enlarged view at B in fig. 13.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a sound production device, which is used for electronic equipment, wherein the electronic equipment can be a notebook computer or a tablet computer and the like.

In an embodiment of the present invention, please refer to fig. 1 and fig. 2 in combination, the sound generating apparatus includes a housing 10, a first vibration system 30, a second vibration system 40, and a magnetic circuit system 20, wherein the first vibration system 30 includes a first diaphragm 31 and two first voice coils 32 disposed on the first diaphragm 31. The second vibration system 40 includes a second diaphragm 41 and two second voice coils 42 provided to the second diaphragm 41. The magnetic circuit system 20 includes two first central magnets 204, two second central magnets 205, a first yoke plate 21 and a second yoke plate 22 having magnetic permeability, and the first yoke plate 21 and the second yoke plate 22 are disposed in parallel between the first diaphragm 31 and the second diaphragm 41.

The two first central magnets 204 and the two second central magnets 205 are alternately arranged in sequence along the circumferential direction of the first diaphragm 31, a first magnetic gap 201 for the first voice coil 32 to extend into is formed on the circumferential side of each first central magnet 204, one side of each first central magnet 204, which is away from the first diaphragm 31, is connected to the second yoke plate 22, a second magnetic gap 202 for the second voice coil 42 to extend into is formed on the circumferential side of each second central magnet 205, and one side of each second central magnet 205, which is away from the second diaphragm 41, is connected to the first yoke plate 21. The first central magnet 204 and the second central magnet 205 are disposed flatly between the first yoke plate 21 and the second yoke plate 22, and at least one of the first yoke plate 21 and the second yoke plate 22 is connected to the housing 10.

In the present embodiment, the magnetic circuit system 20 is disposed between the first diaphragm 31 and the second diaphragm 41, the first yoke plate 21 faces the first diaphragm 31, the first voice coil 32 extends into the first magnetic gap 201 through the first yoke plate 21, the second yoke plate 22 faces the second diaphragm 41, and the second voice coil 42 extends into the second magnetic gap 202 through the second yoke plate 22. The first central magnet 204 and the second central magnet 205 are disposed flatly between the first yoke plate 21 and the second yoke plate 22, which means that the first central magnet 204 and the second central magnet 205 are disposed non-laminated in the arrangement direction of the first yoke plate 21 and the second yoke plate 22. That is, a projection plane is defined, which is perpendicular to the first yoke plate 21 and the second yoke plate 22, and when the arrangement direction of the first central magnet 204 and the second central magnet 205 is taken as a projection direction, orthographic projections of the first central magnet 204 and the second central magnet 205 on the projection plane at least partially overlap. For example, the first central magnet 204 and the second central magnet 205 may be arranged at intervals in a direction perpendicular to the arrangement direction of the first diaphragm 31 and the second diaphragm 41. Or one of the first central magnet 204 and the second central magnet 205 is annular and is arranged around the outer periphery of the other. The first yoke plate 21 and the second yoke plate 22 are mainly used for fixing the magnetic circuit system 20.

In this embodiment, the first yoke plate 21 and the second yoke plate 22 may be used as the magnetic conductive plates of the magnetic circuit system 20, so that there is no need to additionally provide a magnetic conductive plate in the magnetic circuit system 20, which is beneficial to further reducing the thickness of the sound generating device. The number of magnetic conduction plates of the sound generating device can be reduced, the structure of the sound generating device can be simplified, and the assembly procedures can be reduced.

The first voice coil 32 and the second voice coil 42 are both annular voice coils, which is equivalent to the first central magnet 204 at least partially located inside the first voice coil 32, and the second central magnet 205 at least partially located inside the second voice coil 42. When the first magnetic gap 201 is formed on the circumferential side of the first center magnet 204, an effective magnetic field (which means a magnetic field capable of effectively driving the first voice coil 32) may be formed at each position in the circumferential direction of the first center magnet 204, or an effective magnetic field may be formed at a partial position in the circumferential direction of the first center magnet 204, for example, at two opposite sides of the first center magnet 204. Wherein the first voice coil 32 and the second voice coil 42 may be inputted with electric signals, respectively. The first vibration system 30 and the second vibration system 40 may be vibrated separately or simultaneously.

In the technical solution of the present invention, the magnetic circuit system 20 includes a first central magnet 204, a second central magnet 205, a first yoke plate 21 and a second yoke plate 22, the first yoke plate 21 and the second yoke plate 22 are disposed in parallel between the first diaphragm 31 and the second diaphragm 41, a first magnetic gap 201 for the first voice coil 32 to extend into is formed on the peripheral side of the first central magnet 204, one side of the first central magnet 204 departing from the first diaphragm 31 is connected to the second yoke plate 22, a second magnetic gap 202 for the second voice coil 42 to extend into is formed on the peripheral side of the second central magnet 205, and one side of the second central magnet 205 departing from the second diaphragm 41 is connected to the first yoke plate 21. By connecting at least one of the first yoke plate 21 and the second yoke plate 22 to the housing 10, the first center magnet 204 and the second center magnet 205 can be fixed in the housing 10. In addition, the first central magnet 204 and the second central magnet 205 are flatly disposed between the first yoke plate 21 and the second yoke plate 22, so that the situation that the first central magnet 204 and the second central magnet 205 are stacked is avoided, and the situation that the first voice coil 32 and the second voice coil 42 share a magnetic gap in the arrangement direction of the first diaphragm 31 and the second diaphragm 41 is also avoided. That is, compared with the way of stacking the first central magnet 204 and the second central magnet 205, the thickness of the magnetic circuit system 20 and thus the thickness of the sound generating device can be reduced while realizing double-sided sound generation.

So still make first voice coil 32 can independently be in first magnetic gap 201 to can make the interval of first magnetic gap 201 less, thereby can promote the magnetic field utilization ratio, promote the BL value (the force coefficient, the product of magnetic field intensity B (tesla) and voice coil wire length (meter)) that first voice coil 32 produced in first magnetic gap 201, can wholly promote product performance. And when promoting the magnetic field utilization ratio, can reduce the quality of first voice coil loudspeaker voice coil 32, be favorable to promoting the intermediate frequency loudness of product. Similarly, the second voice coil 42 can be independently located in the second magnetic gap 202, so that the distance between the second magnetic gaps 202 is smaller, thereby increasing the magnetic field utilization rate and increasing the BL value generated by the second voice coil 42 in the second magnetic gap 202. And when promoting the magnetic field utilization ratio, can reduce the quality of second voice coil 42, be favorable to promoting the intermediate frequency loudness of product.

In the present embodiment, the first yoke plate 21 and the second yoke plate 22 are both connected to the housing 10 to ensure the stability of the magnetic circuit system 20. Of course, in other embodiments, only the first yoke plate 21 may be connected to the housing 10, in this case, a connector may be disposed between the first central magnet 204 and the second central magnet 205, and the first central magnet 204 and the second central magnet 205 are both disposed at a distance from the connector, and two opposite sides of the connector are respectively connected to the first yoke plate 21 and the second yoke plate 22, so that when one of the first yoke plate 21 and the second yoke plate 22 is connected to the housing 10, the other one can also be fixed. The connecting piece can be a magnet, or the connecting piece has magnetic permeability, or the connecting piece is a non-magnet and does not have magnetic permeability.

With reference to fig. 1 and fig. 2, in an embodiment, the magnetic circuit system 20 includes two first central magnets 204 and two second central magnets 205, the two first central magnets 204 and the two second central magnets 205 are sequentially and alternately arranged along the circumferential direction of the first diaphragm 31, a first magnetic gap 201 is formed on the circumferential side of each first central magnet 204, a second magnetic gap 202 is formed on the circumferential side of each second central magnet 205, the first vibration system 30 is provided with a first voice coil 32 corresponding to each first magnetic gap 201, and the second vibration system 40 is provided with a second voice coil 42 corresponding to each second magnetic gap 202. So set up for first vibrating diaphragm 31 of first vibration system 30 is driven by two first voice coils 32, and second vibrating diaphragm 41 of second vibration system 40 is driven by two second voice coils 42, so can improve the holistic electroacoustic conversion efficiency of sound generating mechanism, provides higher sound pressure level, does benefit to and improves the whole loudness of making a sound of sound generating mechanism. Moreover, the two first central magnets 204 and the two second central magnets 205 are sequentially and alternately arranged along the circumferential direction of the first diaphragm 31, so that the arrangement of the magnetic circuit system 20 is compact, and the length of the sound generating device is reduced.

Referring to fig. 5 or fig. 6, in an embodiment, a first conductive portion 321 is disposed between the two first voice coils 32, so that the two first voice coils 32 are connected in series; so, compare in the technical scheme of two first voice coil 32 mutual independence (for example parallelly connected), the technical scheme of this embodiment can ensure that the electric current size and the electric current direction of two first voice coil 32 are all unanimous to be favorable to making the produced vibration effect of two first voice coil 32 unanimous, thereby improve the vocal effect of product.

In one embodiment, a second conductive part is disposed between the two second voice coils 42, so that the two second voice coils 42 are connected in series; so, compare in the technical scheme of two second voice coil 42 mutual independence (like parallelly connected), the technical scheme of this embodiment can ensure that two second voice coil 42's current size and current direction are all unanimous to be favorable to making two produced vibration effects of second voice coil 42 unanimous, thereby improve the vocal effect of product.

In an embodiment, referring to fig. 5, the two first voice coils 32 are wound by the same first conductive wire, and the first conductive portion 321 is a portion of the first conductive wire for connecting the two first voice coils 32; thus, compared with the technical solution that the first conductive portion 321 is an independent component with respect to the first voice coil 32, the technical solution of this embodiment does not need to perform connection processing between the first conductive portion 321 and the first voice coil 32, thereby saving processing procedures, improving processing efficiency of the product, and meanwhile, avoiding a phenomenon of poor connection between the first conductive portion 321 and the first voice coil 32, and reducing hidden quality troubles of the product. However, the design is not limited thereto, in other embodiments, referring to fig. 6, the first conductive portion 321 is a first flexible circuit board 322, and two ends of the first flexible circuit board 322 are electrically connected to the two first voice coils 32, respectively, it can be understood that the flexible circuit board can be conveniently manufactured in batch, and the flexible circuit board is formed with a pad which is convenient for the lead connection of the first voice coil 32, which is beneficial to improving the product manufacturing efficiency.

In one embodiment, the two second voice coils 42 are wound by the same second conductive wire, and the second conductive portion is a portion of the second conductive wire for connecting the two second voice coils 42; thus, compared with the technical solution that the second conductive part is an independent part relative to the second voice coil 42, the technical solution of this embodiment does not need to perform connection processing between the second conductive part and the second voice coil 42, thereby saving processing procedures, improving the processing efficiency of the product, and meanwhile, avoiding a bad connection phenomenon between the second conductive part and the second voice coil 42, and reducing the quality hidden trouble of the product. However, the design is not limited thereto, and in other embodiments, the second conductive portion is a second flexible circuit board, and two ends of the second flexible circuit board are electrically connected to the two second voice coils 42, respectively, it can be understood that the flexible circuit board can be conveniently manufactured in batch, and the flexible circuit board is formed with a pad which is convenient for the lead connection of the second voice coils 42, which is beneficial to improving the product manufacturing efficiency.

In an embodiment, referring to fig. 5 or fig. 6, the first conductive portion 321 is fixed to the first diaphragm 31, specifically, the first conductive portion 321 may be, but is not limited to be, fixed to the first diaphragm 31 by bonding; therefore, in the vibration process of the first vibration system, the first conductive part 321 is prevented from unnecessarily shaking, so that the phenomenon that the first conductive part 321 is broken due to shaking is avoided, and the phenomenon that the sound effect of a product is influenced due to intermittent touch of the first vibrating diaphragm 31 due to shaking of the first conductive part 321 is also avoided. However, the design is not limited thereto, and in other embodiments, when the first vibration system 30 further includes the first dome 36 connected to the first diaphragm 31, the first conductive portion 321 may be further fixed to the first dome 36.

In an embodiment, the second conductive portion is fixed to the second diaphragm 41, and specifically, the second conductive portion may be, but is not limited to be, fixed to the second diaphragm 41 by bonding; therefore, in the vibration process of the second vibration system, the second conductive part is prevented from generating unnecessary shaking, so that the phenomenon that the second conductive part is broken due to shaking is avoided, and the phenomenon that the sound effect of a product is influenced due to intermittent touch of the second vibrating diaphragm 41 due to shaking of the second conductive part is also avoided. However, the design is not limited thereto, and in other embodiments, when the second vibration system further includes a second dome connected to the second diaphragm 41, the second conductive portion may be further fixed to the second dome.

Referring to fig. 5 to 8, in an embodiment, the first diaphragm 31 is a conductive diaphragm. Specifically, a first conductive layer 34 is disposed on the first diaphragm 31, a first bonding pad 131 is disposed on the housing 10, and the first conductive layer 34 is electrically connected to the first voice coil and the first bonding pad 131; it can be understood that the first conductive layer 34 and the first diaphragm 31 are connected as a whole, so compared with the technical solution of providing an independent wire to connect the first voice coil and the first bonding pad 131, the technical solution of this embodiment has fewer independent parts, and the inside of the product is simpler, and the influence on the sound effect of the product caused by the independent wire touching the first diaphragm 31 can also be avoided. In this embodiment, similar to the first diaphragm 31, the second diaphragm 41 is also a conductive diaphragm, specifically, a second conductive layer is disposed on the second diaphragm 41, and a second pad is further disposed on the casing 10, where the second conductive layer is electrically connected to the second voice coil 42 and the second pad. It should be noted that, in other embodiments, only one of the first diaphragm 31 and the second diaphragm 41 may be set as a conductive diaphragm.

In an embodiment, referring to fig. 8, the first diaphragm 31 includes a first ring-shaped portion 311 extending along a first annular axis 311a, the first conductive layer 34 includes a first conductive segment 341a disposed on the first ring-shaped portion 311, and the first conductive segment 341a is disposed in an arc shape perpendicular to the first annular axis 311a, so that the length of the first conductive segment 341a is shortest, the required material is least, and the cost is lowest. However, the design is not limited to this, in some other embodiments, referring to fig. 9, the first conductive segment 341a may also be disposed in an arc shape that is not perpendicular to the first annular axis 311a, so that the length of the first conductive segment 341a is longer, and thus when the first diaphragm 31 vibrates to generate sound, the first conductive segment 341a can have more allowance that can follow the deformation of the first bending portion, thereby reducing the probability of the first conductive segment 341a breaking and prolonging the service life of the product. In other embodiments, referring to fig. 10, the first conductive segment 341a may be further disposed in a continuous bending manner, such that the length of the first conductive segment 341a is longer, the deformation margin of the first bending portion is more, and the probability of deformation fracture is lower.

In one embodiment, the second diaphragm 41 includes a second flange portion extending along the second annular axis, the second conductive layer includes a second conductive segment disposed on the second flange portion, and the second conductive segment is disposed in an arc shape perpendicular to the second annular axis. However, the design is not limited to this, in some other embodiments, the second conductive segment may also be disposed in an arc shape that is not perpendicular to the second annular axis, so that the length of the second conductive segment is longer, and thus when the second diaphragm 41 vibrates to generate sound, the second conductive segment can have more allowance that can follow the deformation of the second bending portion, thereby reducing the probability of the second conductive segment breaking, and prolonging the service life of the product. In other embodiments, the second conductive segment may be continuously bent, so that the length of the second conductive segment is longer, the second conductive segment has more deformation allowance following the second bent portion, and the probability of deformation and fracture is lower.

In an embodiment, the first conductive layer 34 is printed or spray-formed on the first diaphragm 31, and both the printing and the spray-coating processes are favorable for batch preparation of the first diaphragm 31, thereby improving the production efficiency thereof. However, the design is not limited thereto, and in other embodiments, the first conductive layer 34 may also be, but not limited to, a conductive film layer adhered to the first diaphragm 31.

In an embodiment, the second conductive layer is printed or spray-formed on the second diaphragm 41, and both the printing and spray-coating processes are favorable for batch preparation of the second diaphragm 41, thereby improving the production efficiency thereof. However, the design is not limited thereto, and in other embodiments, the second conductive layer may also be, but not limited to, a conductive film layer adhered to the second diaphragm 41.

In an embodiment, referring to fig. 7 and 8, the first conductive layer 34 includes a first conductive trace 341 and two first conductive connection portions 342 respectively disposed at two ends of the first conductive trace 341, the two first conductive connection portions 342 are electrically connected to the first voice coil and the first bonding pad 131, and the first diaphragm 31 is further provided with a first insulating layer 35 covering the first conductive trace 341, so that the probability of electric leakage of the product can be reduced. It should be noted that the first conductive segment 341a is a portion of the first conductive trace 341. In this embodiment, the first insulating layer 35 may be, but is not limited to, cover the first conductive traces 341 with an insulating paste or an insulating varnish. And the two first conductive connection portions 342 are generally provided in the shape of pads exposed to the outside so as to facilitate connection with the leads of the first voice coil and the first pads 131. It is understood that the edge of the first diaphragm 31 is generally adhered to the casing 10, and optionally, a first conductive connecting portion 342 is adhered to the first bonding pad 131 by conductive glue, so that effective electrical conduction between the first conductive layer 34 and the first bonding pad 131 can be realized, and the adhesion fixation of the first diaphragm 31 and the casing 10 can be assisted.

In an embodiment, the second conductive layer includes a second conductive trace and two second conductive connection portions respectively disposed at two ends of the second conductive trace, the two second conductive connection portions are electrically connected to the second voice coil 42 and the second bonding pad, respectively, and the second diaphragm 41 is further provided with a second insulating layer covering the second conductive trace, so that the probability of electric leakage of the product can be reduced. It should be noted that the second conductive segment is a part of the second conductive trace. In this embodiment, the second insulating layer may be, but is not limited to, cover the second conductive traces with an insulating paste or an insulating varnish. And the two second conductive connection portions are generally provided in the form of exposed pads to facilitate connection with the leads of the second voice coil 42 and the second pads. It will be appreciated that the edge of the second diaphragm 41 is typically adhered to the housing 10, and optionally a second conductive connection portion is adhered to the second pad by a conductive adhesive, so as to achieve effective electrical communication between the second conductive layer and the second pad and also assist in adhesively securing the second diaphragm 41 to the housing 10.

In an embodiment, referring to fig. 11 and 12, the first pads 131 are fixed to the housing 10 by injection molding, and the injection molding process facilitates mass production of products and improves production efficiency thereof. Without loss of generality, the housing 10 is provided with a first conductive terminal 13 corresponding to the first voice coil, the first pad 131 is one end of the first conductive terminal 13 close to the first diaphragm 31, and another pad is further formed at one end of the first conductive terminal 13 far from the first pad 131, and the another pad is used for power supply electrical connection input. In other embodiments, but not limited to, the housing 10 may further be provided with a first insertion hole for the first pad 131 to be tightly inserted.

In an embodiment, the second pad is fixed to the housing 10 by injection molding, and the injection molding process is beneficial to batch preparation of products and improves production efficiency of the products. Without loss of generality, the housing 10 is provided with a second conductive terminal corresponding to the second voice coil 42, the second pad is one end of the second conductive terminal close to the second diaphragm 41, and another pad is further formed at one end of the second conductive terminal far from the second pad, and the another pad is used for power supply electrical connection input. In other embodiments, but not limited to, a second insertion hole for the second pad to be tightly inserted may also be disposed on the housing 10.

In one embodiment, magnetic circuit system 20 further includes a fourth central magnet 207, where fourth central magnet 207 is located between two first central magnets 204 and between two second central magnets 205, and where first central magnet 204 and fourth central magnet 207 form a portion of first magnetic gap 201 therebetween and second central magnet 205 and fourth central magnet 207 form a portion of second magnetic gap 202 therebetween. That is, two first central magnets 204 and two second central magnets 205 are disposed around the fourth central magnet 207, the first voice coil 32 is partially disposed between the first central magnet 204 and the fourth central magnet 207, and the second voice coil 42 is partially disposed between the second central magnet 205 and the fourth central magnet 207. In this embodiment, the first central magnet 204, the second central magnet 205 and the fourth central magnet 207 are all magnets, so that the space between the two first central magnets 204 and the space between the two second central magnets 205 can be fully utilized, and the fourth central magnet 207 can be utilized by the two first voice coils 32 and the two second voice coils 42, thereby improving the utilization rate of the internal space of the sound generating device and improving the efficiency of the magnetic circuit. Of course, in other embodiments, the first central magnet 204 and the second central magnet 205 may be configured as magnets, and the fourth central magnet 207 has magnetic permeability, so that the magnetic lines of force of the first magnetic gap 201 and the second magnetic gap 202 can be modified by the fourth central magnet 207, and the fourth central magnet 207 can be utilized by the two first voice coils 32 and the two second voice coils 42, so that the utilization ratio of the internal space of the sound generating device can be improved. In addition, the first central magnet 204 and the second central magnet 205 may be provided as members having magnetic permeability, and the fourth central magnet 207 may be provided as a magnet, so that the fourth central magnet 207 can also be utilized by the two first voice coils 32 and the two second voice coils 42, and the utilization ratio of the internal space of the sound generating apparatus can be improved.

In one embodiment, the first yoke plate 21 includes a first support portion 212 and a first connection portion 213 connected to the first support portion 212, the first connection portion 213 is connected to the housing 10, the first support portion 212 extends in the arrangement direction of the two second central magnets 205, and the two second central magnets 205 are connected to the first support portion 212. The second yoke plate 22 includes a second support portion 223, the second support portion 223 extending in the arrangement direction of the two first central magnets 204, and the two first central magnets 204 are coupled to the second support portion 223. The two first voice coils 32 extend into the first magnetic gap 201 from the opposite sides in the width direction of the first support part 212, and the two second voice coils 42 extend into the second magnetic gap 202 from the opposite sides in the width direction of the second support part 223.

Specifically, the first support portion 212 and the second support portion 223 are each elongated, and the longitudinal direction of the first support portion 212 and the longitudinal direction of the second support portion 223 are substantially perpendicular. The distance between the two first central magnets 204 is greater than the width of the first supporting portion 212 to ensure that the two first central magnets 204 can be exposed towards the first diaphragm 31, thereby ensuring that the first voice coil 32 can extend into the first magnetic gap 201. Similarly, the distance between the two second central magnets 205 is greater than the width of the second support portion 223 to ensure that the two second central magnets 205 can be exposed towards the second diaphragm 41, thereby ensuring that the second voice coil 42 can extend into the second magnetic gap 202. With this arrangement, it is possible to secure the fixation of the first center magnet 204 and the second center magnet 205 and prevent the first supporting portion 212 and the second supporting portion 223 from occupying the space in the depth direction of the first magnetic gap 201 and the second magnetic gap 202. Of course, in other embodiments, the first yoke plate 21 may be provided with an escape through hole corresponding to the first voice coil 32, and the second yoke plate 22 may be provided with an escape through hole corresponding to the second voice coil 42.

In the embodiment where the fourth central magnet 207 is provided, the fourth central magnet 207 is located between the first support part 212 and the second support part 223. At this time, opposite sides of the fourth central magnet 207 may be respectively coupled to the first and

second support portions

212 and 223 to fix the first and

second yoke plates

21 and 22 to each other, i.e., the second yoke plate 22 may be fixed to the first yoke plate 21 while the first yoke plate 21 is coupled by the first coupling portion 213, so that the second yoke plate 22 may not be coupled to the housing 10. Of course, to further ensure the stability of the magnetic circuit system 20, the second yoke plate 22 may be connected to the housing 10.

In one embodiment, the first connection portion 213 is annular, one end of the first support portion 212 is connected to one side of the first connection portion 213, the other end of the first support portion 212 is connected to the other side of the first connection portion 213, and two opposite sides of the first support portion 212 in the width direction are spaced from the first connection portion 213 for the first voice coil 32 to pass through. In this way, the first connection portion 213 can be connected to the housing 10 as a whole, so that the reliability of connection between the first yoke plate 21 and the housing 10 can be increased, and the structural strength of the housing 10 can be enhanced by the first connection portion 213. Of course, in other embodiments, the first connecting portion 213 may be an end portion of the first supporting portion 212, i.e., an elongated portion corresponding to the first yoke plate 21.

In one embodiment, the second yoke plate 22 further includes a second connecting portion 224, the second connecting portion 224 is annular and connected to the housing 10, one end of a second supporting portion 223 is connected to one side of the second connecting portion 224, the other end of the second supporting portion 223 is connected to the other side of the second connecting portion 224, and two opposite sides of the second supporting portion 223 in the width direction are spaced from the second connecting portion 224, so that the second voice coil 42 can pass through the second supporting portion 223. In this way, the second connection portion 224 can be connected to the housing 10 as a whole, so that the reliability of connection between the second yoke plate 22 and the housing 10 can be increased, and the structural strength of the housing 10 can be enhanced by the second connection portion 224. Of course, in other embodiments, the second connecting portion 224 may be a portion of the end of the second supporting portion 223, that is, an elongated shape corresponding to the second yoke plate 22.

In one embodiment, the magnetic circuit system 20 further includes two first side magnets 24, and any one of the first side magnets 24 is spaced apart from one of the first central magnets 204 on a side facing away from the other first central magnet 204 and connected to the second support portion 223. That is, the two sides of the first central magnet 204 facing away from each other are spaced apart from the first connecting portion 213, and the first side magnet 24 is located between the first central magnet 204 and the first connecting portion 213. By providing one first edge magnet 24 on the side of each first central magnet 204 facing away from the other first central magnet 204, the magnetic induction of the first magnetic gap 201 can be increased to improve the vibration performance of the first vibration system 30. The first side magnet 24 can be supported by the first support portion 212, and the utilization rate of the first yoke plate 21 can be improved.

Further, in an embodiment, the first yoke plate 21 has magnetic permeability, and the first yoke plate 21 further includes a first side magnetic conducting plate 214, and the first side magnetic conducting plate 214 is connected to an inner side of the first connecting portion 213 and connected to a side of the first side magnet 24 away from the second supporting portion 223. With this arrangement, when the first side magnetic conductive plate 214 is used to correct the magnetic force lines between the first side magnet 24 and the first center magnet 204, the first side magnetic conductive plate 214 can restrict the first side magnet 24 from moving in the direction away from the second support portion 223, thereby improving the stability of the magnetic circuit system 20. Furthermore, when the first side magnetic conductive plate 214, the first connecting portion 213, and the first supporting portion 212 are integrally formed, the connecting process of the three can be reduced.

In one embodiment, the magnetic circuit system 20 further includes two second side magnets 25, and any one of the second side magnets 25 is spaced apart from one of the second central magnets 205 on a side facing away from the other second central magnet 205 and is connected to the first support portion 212. That is, the two sides of the second center magnet 205 facing away from each other are both spaced apart from the second connection portion 224, and the second side magnet 25 is located between the second center magnet 205 and the second connection portion 224. By providing a second side magnet 25 on the side of each second central magnet 205 facing away from another second central magnet 205, the magnetic induction of the second magnetic gap 202 can be increased, so as to improve the vibration performance of the second vibration system 40. The second side magnet 25 can be supported by the second support portion 223, and the utilization rate of the second yoke plate 22 can be improved.

In one embodiment, the second yoke plate 22 has magnetic permeability, and the second yoke plate 22 further includes a second edge magnetic conductive plate 225, where the second edge magnetic conductive plate 225 is connected to an inner side of the second connecting portion 224 and connected to a side of the second edge magnet 25 facing away from the first supporting portion 212. With this arrangement, when the second side magnetic conductive plate 225 is used to correct the magnetic force lines between the second side magnet 25 and the second central magnet 205, the second side magnet 25 can be restricted from moving in the direction away from the first supporting portion 212 by the second side magnetic conductive plate 225, so that the stability of the magnetic circuit system 20 can be improved. When the second side magnetic conductive plate 225, the second connecting portion 224, and the second supporting portion 223 are integrally formed, the number of connecting processes of the three can be reduced.

In one embodiment, the lengths of the two first central magnets 204 along the arrangement direction of the two second central magnets 205 are gradually increased in the direction away from each other, and the lengths of the two second central magnets 205 along the arrangement direction of the two first central magnets 204 are gradually increased in the direction away from each other. Specifically, the shape of the first voice coil 32 is substantially the same as the shape of the first center magnet 204, and the shape of the second voice coil 42 is substantially the same as the shape of the second center magnet 205. Compare when first central magnet 204 and second central magnet 205 all are square setting, so can reduce the clearance between adjacent first central magnet 204 and the second central magnet 205, can improve sound generating mechanism inner space utilization, improve magnetic circuit efficiency.

Referring to fig. 1 and fig. 3, in an embodiment, the first vibration system 30 includes a first supporting piece 33, the first supporting piece 33 includes a first supporting piece connecting portion 331 and two third supporting portions 334, the first supporting piece connecting portion 331 is connected to the casing 10, and each of the third supporting portions 334 is connected to one of the first voice coils 32; the first supporting piece connecting portion 331 may or may not be provided in a ring shape (for example, but not limited to, when the first centering supporting piece 33 is configured as a four-corner centering supporting piece). Specifically, the first support part 331 is provided between the end surface of the casing 10 and the first diaphragm 31, and the third support part 334 is provided inside the first support part 331. With this arrangement, the connection area between the first support piece connecting portion 331 and the housing 10 is large, and the connection stability of the first centering support piece 33 can be increased. And two first voice coils 32 are connected through one first centering branch 33, so that the vibration of the two first voice coils 32 is consistent, and the split vibration can be effectively inhibited. Of course, in other embodiments, there may be a plurality of first yokes 33, and each first yoke 33 is connected to one first voice coil 32.

In one embodiment, the third supporting portion 334 of the first supporting core 33 includes two first supporting arms 335, the two first supporting arms 335 are spaced apart from each other, and each first supporting arm 335 is connected between the first supporting core connecting portion 331 and the first voice coil 32. That is, the two first supporting arms 335 are independent from each other, and are distributed at intervals along the arrangement direction of the two second voice coils 42, and the free ends of the two first supporting arms 335 are respectively arranged at the two ends of the first voice coil 32 in the arrangement direction of the two second voice coils 42. Therefore, the elasticity of each first supporting arm 335 can be ensured to be good, and the resistance of the first centering branch 33 to the first diaphragm 31 can be reduced. Of course, in other embodiments, the free ends of the two first support arms 335 may be connected to each other.

Referring to fig. 1 and 4, in an embodiment, the second vibration system 40 further includes a second centering support 44, the second centering support 44 includes a second support connecting portion 441 and two fourth supporting portions 448, the second support connecting portion 441 is connected to the housing 10, and each fourth supporting portion 448 is connected to one second voice coil 42. The second support piece connecting portion 331 may or may not be provided in a ring shape (for example, but not limited to, when the second centering support piece 33 is configured as a four-corner centering support piece). Specifically, the second support piece connecting portion 441 is disposed between an end surface of the casing 10 facing away from the first diaphragm 31 and the second diaphragm 41, and the fourth supporting portion 448 is located on an inner side of the second support piece connecting portion 441. With this arrangement, the connection area between the second supporting piece connecting portion 441 and the housing 10 is large, and the connection stability of the second centering supporting piece 44 can be increased. And two second voice coils 42 are connected through one second centering branch 44, so that the vibration of the two second voice coils 42 is consistent, and the split vibration can be effectively inhibited. Of course, in other embodiments, there may be a plurality of second spider 44, and each second spider 44 is connected to one second voice coil 42.

In one embodiment, the fourth supporting portion 448 of the second centering flap 44 includes two second supporting arms 449, one end of each second supporting arm 449 is connected to the second flap connecting portion 441, the two second supporting arms 449 are spaced apart from each other, and each second supporting arm 449 is connected between the second flap connecting portion 441 and the second voice coil 42. That is, the two second support arms 449 are independent of each other, and are distributed at intervals along the arrangement direction of the two first voice coils 32, and the free ends of the two second support arms 449 are respectively arranged at the two ends of the second voice coil 42 in the arrangement direction of the two first voice coils 32. Therefore, the elasticity of each second supporting arm 449 can be ensured to be good, and the resistance of the second centering branch piece 44 to the second diaphragm 41 can be reduced. Of course, in other embodiments, the free ends of the two second support arms 449 may be interconnected.

Referring to fig. 2, in an embodiment, the housing 10 includes two connecting shells 11, the two ends of the connecting shells 11 are open, and the open ends of the two connecting shells 11 are connected. That is, the two connecting shells 11 are separately arranged, and during assembly, the open ends of the two connecting shells 11 are connected, so that during assembly, the magnetic circuit system 20 can be partially mounted on the connecting shells 11, and then the two connecting shells 11 are connected, thereby facilitating the assembly of the housing 10 and the magnetic circuit system 20. For example, but not limited to, the first yoke plate 21 may be fixed to one of the coupling cases 11, the second center magnet 205 may be fixed to the first yoke plate 21, the second yoke plate 22 may be fixed to the other coupling case 11, and the two coupling cases 11 may be fixed after the first center magnet 204 is fixed to the second yoke plate 22. In one embodiment, one of the connecting shells 11 is integrally formed with the first yoke plate 21, and the other connecting shell 11 is integrally formed with the second yoke plate 22. Therefore, the structural strength of the shell 10 can be improved through the first yoke plate 21 and the second yoke plate 22, the stability of the shell 10 and the magnetic circuit system 20 can be improved, the number of parts of the sound generating device in the assembling process can be reduced, and the assembling process can be reduced. Of course, in other embodiments, the housing 10 and the yoke plate may be bonded or fixed together by screws or the like. Additionally, in other embodiments, the housing 10 may be a unitary structure.

Referring to fig. 1, in an embodiment, Sd (effective vibration radiation area) of the first vibration system 30 and the second vibration system 40 is substantially equivalent, so that parameters of the first vibration system 30 and the second vibration system 40 are substantially equivalent, so as to reduce vibration of the sound generating device caused by operation of the first vibration system 30 and the second vibration system 40, and achieve a better vibration damping effect. In an embodiment, the BL values of the first vibration system 30 and the second vibration system 40 are substantially equivalent, so that the parameters of the first vibration system 30 and the second vibration system 40 are substantially equivalent, so as to reduce the vibration of the sound generating device caused by the operation of the first vibration system 30 and the second vibration system 40, and achieve a better vibration damping effect. In an embodiment, the Mms (equivalent mass) of the first vibration system 30 and the second vibration system 40 are substantially equivalent, so that the parameters of the first vibration system 30 and the second vibration system 40 are substantially equivalent, so as to reduce the vibration of the sound generating device caused by the operation of the first vibration system 30 and the second vibration system 40, and achieve a better vibration damping effect. In an embodiment, Cms (compliance) of the first vibration system 30 and the second vibration system 40 are substantially equivalent, so that parameters of the first vibration system 30 and the second vibration system 40 are substantially equivalent, so as to reduce vibration of the sound generating device caused by operation of the first vibration system 30 and the second vibration system 40, and achieve a good vibration damping effect.

In an embodiment, Sd (effective vibration radiation area) of the first vibration system 30 and the second vibration system 40 is approximately equivalent, BL value of the first vibration system 30 and the second vibration system 40 is approximately equivalent, Mms (equivalent mass) of the first vibration system 30 and the second vibration system 40 is approximately equivalent, and Cms (compliance) of the first vibration system 30 and the second vibration system 40 is approximately equivalent, so that parameters of the first vibration system 30 and the second vibration system 40 are approximately equivalent, so as to reduce vibration of the sound generating device caused by operation of the first vibration system 30 and the second vibration system 40, and achieve a good vibration damping effect.

In one embodiment, the mass of the first vibration system 30 is substantially equivalent to that of the second vibration system 40, so as to reduce the vibration of the sound generating device caused by the operation of the first vibration system 30 and the second vibration system 40, thereby achieving a better vibration damping effect.

In one embodiment, the two first voice coils 32 of the first vibration system 30 are arranged in a central symmetry manner, so as to improve the balance of the first vibration system 30 and reduce the separation vibration. In one embodiment, the two second voice coils 42 of the second vibration system 40 are arranged in a central symmetry manner, so as to improve the balance of the second vibration system 40 and reduce the separation vibration.

The present invention further provides an electronic device, which includes a housing and a sound generating device, and the specific structure of the sound generating device refers to the above embodiments, and since the electronic device adopts all technical solutions of all the above embodiments, the electronic device at least has all beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein. Wherein, the sound generating device is arranged in the shell. The electronic device can be a mobile phone, a smart watch, a tablet computer or a computer.

In one embodiment, referring to fig. 13 and 14, the housing 5 is provided with a mounting cavity 501 and two sound emitting portions 503, the sound generating device 1 divides the mounting cavity 501 into two sound emitting cavities 502, the first diaphragm 31 of the sound generating device 1 is communicated with one of the sound emitting portions 503 through one of the sound emitting cavities 502, and the second diaphragm 41 of the sound generating device 1 is communicated with the other sound emitting portion 503 through the other sound emitting cavity 502.

In this embodiment, the first diaphragm 31 of the sound generating apparatus 1 is communicated with one of the sound emitting cavities 502, and the second diaphragm 41 of the sound generating apparatus 1 is communicated with the other sound emitting cavity 502, which means that the space on the side where the first diaphragm 31 and the second diaphragm 41 depart from each other is respectively communicated with the two sound emitting cavities 502 in a one-to-one correspondence manner, so that when the diaphragms vibrate and generate sound, the sound can be transmitted from the sound emitting cavities 502 and the sound emitting portions 503 to the outside of the housing. The two sound emitting portions 503 are disposed at an interval on the housing, sound emitting directions of the two sound emitting portions 503 form an included angle or are opposite, and the two sound emitting portions 503 may be located on different sides or other positions of the electronic device, for example, when the electronic device is a smart watch, both the two sound emitting portions 503 may be disposed on the peripheral side of the electronic device.

The electronic device has a play mode in which the first vibration system 30 and the second vibration system 40 of the sound generating apparatus 1 radiate sound waves of the same phase outward through the respective corresponding sound emitting portions 503, and an earphone mode in which the first vibration system 30 and the second vibration system 40 radiate sound waves of opposite phases outward through the respective corresponding sound emitting portions 503. That is, in the play-out mode, the first diaphragm 31 and the second diaphragm 41 are controlled to vibrate simultaneously in opposite directions, so that the first vibration system 30 and the second vibration system 40 both radiate normal-phase sound waves outwards through the corresponding sound emitting portions 503, and the volume can be effectively increased, so that the sound generating device 1 can play a role of playing sound outside a loudspeaker. In the earpiece mode, the first diaphragm 31 and the second diaphragm 41 are controlled to vibrate simultaneously in the same direction, so that when one of the first vibration system 30 and the second vibration system 40 radiates the positive phase sound wave/the reverse phase sound wave outwards through the corresponding sound emitting part 503, the other one radiates the reverse phase sound wave/the positive phase sound wave outwards through the corresponding sound emitting part 503. When the electronic device is used for a call, one of the sound emitting portions 503 is close to the ear of the user, and the other sound emitting portion 503 is far away from the ear of the user relative to the sound emitting portion 503, so that an acoustic dipole effect can be formed for people around the user, specifically, the distance between the two sound emitting portions 503 is negligible, the distances from the two sound emitting portions 503 to the ears of the people around the user are close, and the sound waves with opposite phases of the first vibration system 30 and the second vibration system 40 reach the ears of the people around the user and are mutually cancelled, so that the purpose of reducing the sound leakage is achieved. For the user, the distance between the two sound outlet portions 503 and the ear of the user is relatively different, the condition of the dipole effect is not satisfied, the sound wave cancellation degree is small, and therefore the user can hear the sound with proper loudness.

According to the technical scheme, the mounting cavity 501 in the shell 5 is divided into two sound outlet cavities 502 through the sound generating device 1, the sound outlet parts 503 are arranged on the shell 5 corresponding to each sound outlet cavity 502, the first vibration system 30 and the second vibration system 40 of the sound generating device 1 are respectively in one-to-one correspondence with the two sound outlet cavities 502, and therefore sound can be generated through the two sound outlet parts 503. When a user uses the electronic device to talk, the electronic device can be set in an earphone mode, that is, one of the sound emitting portions 503 can be close to the ear, and the sound wave radiated outwards by the sound emitting portion 503 close to the ear is opposite in phase to the sound wave radiated outwards by the other sound emitting portion 503 by controlling the first vibration system 30 and the second vibration system 40, so that an acoustic dipole effect can be formed, and the sounds emitted by the two sound emitting portions 503 are mutually cancelled at the peripheral position of the user of the electronic device, thereby reducing the risk of sound leakage when the user uses the electronic device to talk, and realizing the privacy protection function when the electronic device talks. Moreover, since the first vibration system 30 and the second vibration system 40 can work independently, parameters such as signals and voltages of the first vibration system 30 and the second vibration system 40 can be adjusted at will, so as to achieve the best conversation and privacy protection effects. In addition, the electronic device may be set in the play mode, that is, the first vibration system 30 and the second vibration system 40 may be controlled to radiate sound waves with the same phase through the two sound emitting portions 503, so that the volume deficiency caused by the size of the sound emitting apparatus 1 may be compensated, the volume may be effectively increased, and the sound emitting portions 503 may be used as speakers to play sound outside.

In the following embodiments, the electronic device is taken as a mobile phone for illustration, but not limited thereto. The housing 5 has a front face 51, a rear face 52 and a top side 53, the front face 51 being provided with the display portion, the rear face 52 being disposed opposite the front face 51, the top side 53 being located between the rear face 52 and the front face 51.

In one embodiment, referring to fig. 14, in one embodiment, one sound emitting portion 503 is disposed at a connection position of the front surface 51 and the top surface 53, and the other sound emitting portion 503 is disposed at a connection position of the back surface 52 and the top surface 53. When one of the sound emitting parts 503 is arranged at the connection position of the front surface 51 and the top surface 53, it can be ensured that the coupling effect of the sound emitting part 503 and the ear part is good when a user communicates, so that the user can clearly listen to the sound emitted from the sound emitting part 503, and the communication listening effect of the user is improved. The occupied space of the sound emitting part 503 on the front surface 51 can be reduced, namely, the space of the front surface 51 occupied by the sound emitting part 503 for arranging the display part is reduced, the size of the display part is increased, and the mobile phone with the full screen is realized. On the other hand, by providing the other sound emitting portion 503 at the joint between the back surface 52 and the top surface 53, when the two sound emitting portions 503 are used as speakers to emit sound, the matching effect of the two sound emitting portions 503 can be improved, and the volume of the emitted sound can be improved. Therefore, the better conversation privacy protection function and the loudspeaker playing function can be achieved. Of course, in other embodiments, the sound emitting portion 503 relatively closer to the front surface 51 may also be disposed on the front surface 51, and the sound emitting portion 503 relatively closer to the back surface 52 may also be disposed on the back surface 52 or the top side 53.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A sound generating device, comprising:

a housing;

2. The sound generating apparatus according to claim 1, wherein a first conductive portion is provided between two of said first voice coils so that the two first voice coils are connected in series; and/or the presence of a gas in the gas,

3. The apparatus according to claim 2, wherein two of said first voice coils are wound by a same first conductive wire, and said first conductive portion is a portion of said first conductive wire for connecting two of said first voice coils; and/or the presence of a gas in the gas,

4. The sound generating apparatus according to claim 2, wherein the first conductive portion is a first flexible circuit board, and two ends of the first flexible circuit board are electrically connected to the two first voice coils, respectively; and/or the presence of a gas in the gas,

5. The sound generating apparatus according to claim 2, wherein the first conductive portion is fixed to the first diaphragm; and/or the second conductive part is fixedly arranged on the second diaphragm;

6. The sound generating apparatus of claim 2, wherein the first diaphragm and/or the second diaphragm is a conductive diaphragm.

7. The sound generating apparatus as claimed in claim 2, wherein said magnetic circuit system further comprises a fourth central magnet, said fourth central magnet being positioned between two of said first central magnets and between two of said second central magnets, said first central magnet and said fourth central magnet forming a portion of said first magnetic gap therebetween, said second central magnet and said fourth central magnet forming a portion of said second magnetic gap therebetween.

8. The sound generating apparatus as claimed in claim 7, wherein said first yoke plate includes a first supporting portion and a first connecting portion connecting said first supporting portion, said first connecting portion being connected to said housing, said first supporting portion extending in a direction in which two of said second central magnets are arranged, said two of said second central magnets being connected to said first supporting portion;

the second yoke plate includes a second support portion extending in the arrangement direction of the two first central magnets, which are connected to the second support portion;

9. The sound generating apparatus according to claim 8, wherein the first connecting portion is annular, one end of the first supporting portion is connected to one side of the first connecting portion, the other end of the first supporting portion is connected to the other side of the first connecting portion, and two opposite sides of the first supporting portion in the width direction are spaced from the first connecting portion for the first voice coil to pass through; and/or the presence of a gas in the atmosphere,

10. The sound generating apparatus as claimed in claim 9, wherein said magnetic circuit system further comprises two first side magnets, any one of said first side magnets being spaced apart from one side of said first central magnet facing away from the other of said first central magnets and being connected to said second support portion, said first yoke plate further comprising a first side magnetic conductive plate connected to an inner side of said first connection portion and to a side of said first side magnet facing away from said second support portion; and/or the presence of a gas in the gas,

11. The sound generating apparatus according to any one of claims 1 to 10, wherein the first vibration system further comprises a first damper, the first damper comprising a first damper connecting portion connected to the housing and two third supporting portions, each of the third supporting portions being connected to one of the first voice coils; and/or, the second vibration system still includes the centering piece of second, the centering piece of second includes second piece connecting portion and two fourth supporting parts, second piece connecting portion connect the casing, each the fourth supporting part connects one the second voice coil.

12. An electronic device, characterized by comprising the sound emitting apparatus according to any one of claims 1 to 11; and