CN114866910A

CN114866910A - Sound production device, sound production module and electronic equipment

Info

Publication number: CN114866910A
Application number: CN202210344618.4A
Authority: CN
Inventors: 蔡晓东; 刘松; 郎贤忠; 张成飞; 刘春发
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-08-05

Abstract

The invention discloses a sounding device, a sounding module and electronic equipment. The first sound generating unit comprises a first vibrating diaphragm and a first voice coil, the second sound generating unit comprises a second vibrating diaphragm and a second voice coil, the first vibrating diaphragm and the second vibrating diaphragm are respectively arranged on two sides of the sound generating device, which are back to back, and the first voice coil and the second voice coil are electrically connected with the control circuit board; the control circuit board is arranged on one side of the first sound generating unit or the second sound generating unit. The first diaphragm comprises a first diaphragm main body and a first conductive circuit integrated with the first diaphragm main body, one end of the first conductive circuit is electrically connected with a lead of the first voice coil, and the other end of the first conductive circuit is electrically connected with the control circuit board; the second diaphragm comprises a second diaphragm main body and a second conductive circuit integrated with the second diaphragm main body, one end of the second conductive circuit is electrically connected with a lead of the second voice coil, and the other end of the second conductive circuit is electrically connected with the control circuit board. The technical scheme of the invention can bring convenience to assembly of the device and simultaneously ensure that the magnetic circuit system has stronger magnetic force performance.

Description

Sound production device, sound production module and electronic equipment

Technical Field

The invention relates to the technical field of electroacoustic transduction, in particular to a sounding device, a sounding module applying the sounding device and electronic equipment applying the sounding device or the sounding module.

Background

At present, in order to enable an electronic device in the related art to have a good stereo effect when the electronic device is in a speaker play mode and a good privacy protection effect when the electronic device is in an earpiece phone mode. Generally, a double-sided sounding unit is directly used in an audio system of an electronic product, so that two sound waves with the same phase are emitted to perform superposition enhancement to achieve a stereo effect when a loudspeaker is in a play mode, or two sound waves with opposite phases are emitted to perform offset attenuation based on an acoustic dipole effect to achieve a privacy protection effect when an earphone conversation mode is improved.

However, in the above solution, if the voice coil in the vibration system still uses a conventional conductive spider to electrically connect the voice coil and the control circuit board, the conductive spider needs to further electrically conduct the voice coil in order to realize the centering and supporting function of the voice coil, so that the conductive spider needs to be provided with a conductive body inside. In addition, in order to avoid the internal conductor from being broken during the movement of the yoke following the voice coil, the volume of the yoke needs to be set very large. In this case, the bulky centering clip increases the occupation of the installation space, and makes it very difficult to install the centering clip in a limited space. Particularly, in the scheme, two sets of system vibration systems in the double-sided sounding unit are respectively provided with a large-size centering support, so that the assembly difficulty of the double-sided sounding unit is multiplied. Simultaneously, bulky centering support piece also can make the magnetic circuit of sound production module set very big dodge the space of seting up that needs correspond, leads to weakening magnetic circuit's magnetic force performance to a great extent.

Disclosure of Invention

The invention mainly aims to provide a sounding device, which aims to reduce the whole volume of the sounding device, improve the convenience of subsequent installation and simultaneously ensure that a magnetic circuit system of the sounding device has stronger magnetic force performance.

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

a first utterance and a second utterance;

the first sound generating unit comprises a first vibrating diaphragm and a first voice coil, the second sound generating unit comprises a second vibrating diaphragm and a second voice coil, the first vibrating diaphragm and the second vibrating diaphragm are respectively positioned on two opposite sides of the sound generating device, and the first voice coil and the second voice coil are respectively electrically connected with the same control circuit board; the control circuit board is arranged on one side of the first sound generating unit, or the control circuit board is arranged on one side of the second sound generating unit;

the first diaphragm comprises a first diaphragm main body and a first conducting circuit integrally formed with the first diaphragm main body, one end of the first conducting circuit is electrically connected with a lead of the first voice coil, and the other end of the first conducting circuit is electrically connected with the control circuit board;

the second diaphragm comprises a second diaphragm main body and a second conducting circuit integrally formed with the second diaphragm main body, one end of the second conducting circuit is electrically connected with a lead of the second voice coil, and the other end of the second conducting circuit is electrically connected with the control circuit board;

the control circuit board is arranged on one side of the first sounding unit, or the control circuit board is arranged on one side of the second sounding unit.

Optionally, the control circuit board is led out from one side position of the sounding device;

the control circuit is led out from the long shaft side of the sounding device, or the control circuit is led out from the short shaft side of the sounding device.

Optionally, the first voice coil has two first leads, the first conductive trace includes a first trace portion and a second trace portion that are electrically insulated, and the first trace portion and the second trace portion are both bonded to a surface of the first film body facing the first voice coil;

one ends of the first circuit part and the second circuit part are respectively and electrically connected with the two first leads, and the other ends of the first circuit part and the second circuit part are respectively and electrically connected with the control circuit board.

Optionally, the two first leads are respectively led out from one side of the first voice coil corresponding to the control circuit board and one side far away from the control circuit board;

one end of the first circuit part is electrically connected with one first lead, and the other end of the first circuit part is electrically connected with the control circuit board;

one end of the second circuit part is electrically connected with the other first lead, and the other end of the second circuit part extends to the edge of the first film main body, is led out to one side of the control circuit board from the edge of the first film main body and is electrically connected with the control circuit board.

Optionally, after the end of the second circuit portion, which is far away from the first lead, extends to the edge of the side of the first film main body, which is far away from the control circuit board, the end of the second circuit portion extends to the side of the first film main body, which is provided with the control circuit board, along the edge track of the first film main body on the first film main body.

Optionally, one side of the first film main body, which is close to the control circuit board, is provided with an extension portion, the extension portion is provided with two mutually insulated first circuit portions and second circuit portions, and the control circuit board is electrically connected with the first circuit portions and the second circuit portions on the extension portion.

Optionally, the second voice coil has two second leads, the second conductive trace includes a third trace portion and a fourth trace portion electrically insulated from each other, and the third trace portion and the fourth trace portion are bonded to a surface of the second film main body facing the second voice coil

One ends of the third circuit part and the fourth circuit part are respectively and electrically connected with the two second leads, and the other ends of the third circuit part and the fourth circuit part are respectively and electrically connected with the control circuit board.

Optionally, two second leads are led out from two corner portions of one side of the second voice coil corresponding to the control circuit board;

one ends of the third circuit portion and the fourth circuit portion are electrically connected to the two second leads, respectively, and the other ends of the third circuit portion and the fourth circuit portion extend to the two corner regions of the second film main body, respectively, and are electrically connected to the control circuit board.

Optionally, the control circuit board is disposed on a long axis side or a short axis side of the sound generating device, and the second lead is led out from the two opposite short axes or long axes, extends to an edge of the second film main body, extends to one side of the control circuit board from the edge of the second film main body, and is electrically connected to the control circuit board.

Optionally, the second sound generating unit further comprises a second frame body, the second frame body is fixedly combined with the second film main body, a supporting portion is arranged at a corner of the second frame body, and the supporting portion extends to one side of the first sound generating unit;

the supporting part of the second frame body is embedded with two conductive inserts, one ends of the two conductive inserts are respectively and electrically connected with the third circuit part and the fourth circuit part, and the other ends of the two conductive inserts are electrically connected with the control circuit board.

Optionally, each conductive insert includes a connecting portion, and a first pad and a second pad disposed at two opposite ends of the connecting portion;

two first pads in the two conductive inserts are respectively and electrically connected to the third circuit portion and the fourth circuit portion, and two second pads are both electrically connected to the control circuit board.

Optionally, the control circuit board is disposed on one of the stub shafts of the sound generating device, and the control circuit board is a flexible circuit board.

Optionally, a projection plane parallel to the first sound generating unit and the second sound generating unit is defined, an orthographic projection area of the first sound generating unit is smaller than an orthographic projection area of the second sound generating unit, and the control circuit board is disposed on one side of the first sound generating unit.

Optionally, the lead of the first voice coil and the first conductive circuit, and the lead of the second voice coil and the second conductive circuit are electrically connected through conductive adhesive;

the first conductive circuit and the second conductive circuit are electrically connected with the control circuit board through conductive adhesive.

Optionally, the sound production device further comprises a magnetic circuit system, wherein the magnetic circuit system is arranged between the first sound production unit and the second sound production unit;

the first sound generating unit and the magnetic circuit system are enclosed to form a first rear cavity, the second sound generating unit and the magnetic circuit system are enclosed to form a second rear cavity, and the second rear cavity is isolated from the first rear cavity.

The invention also provides a sounding module, which comprises the sounding device and a fixed shell, wherein the sounding device is arranged in the fixed shell, and the fixed shell and the sounding device enclose to form an expansion cavity;

the first rear cavity of the sounding device and the expansion cavity are arranged in an isolated mode and communicated with the external space of the sounding module, and the second rear cavity is communicated with the expansion cavity.

The invention also proposes an electronic device comprising:

the device comprises a machine shell, a first connecting piece and a second connecting piece, wherein a mounting cavity is formed in the machine shell; and

the sound production device or the sound production module as described above, wherein the first rear cavity of the sound production device is communicated with the mounting cavity of the housing.

According to the sound production device, the first sound production unit and the second sound production unit are arranged, so that two sound waves can be produced by the first sound production unit and the second sound production unit. At this time, the two sound waves can be superposed to play a role in enhancing when the phases of the two sound waves are the same, so that the stereo effect of the sound production device in the sound external mode can be improved. And when the phase place of two kinds of sound waves is opposite, based on sound dipole effect principle, this two kinds of opposite sound waves of phase place can offset and play the attenuation to can improve the privacy protection effect of vocal device when earphone conversation mode.

In addition, the first diaphragm in the first sound generating unit of the sound generating device in the scheme comprises a first diaphragm main body and a first conductive circuit integrally formed with the first diaphragm main body, and the second diaphragm in the second sound generating unit comprises a second diaphragm main body and a second conductive circuit integrally formed with the second diaphragm main body. Therefore, the first voice coil in the first sound production unit can be electrically connected with the control circuit board through the first conducting circuit on the first vibrating diaphragm, and similarly, the second voice coil in the second sound production unit can be electrically connected with the control circuit board through the second conducting circuit on the second vibrating diaphragm. That is to say, first vibrating diaphragm and the second vibrating diaphragm of sound production device in this scheme all have electric conductive property and can directly be used for electric conductive property first voice coil loudspeaker voice coil and control circuit board to and second voice coil loudspeaker voice coil and control circuit board. So compare in the adoption electrically conductive centering disk of traditional sound production device and realize voice coil loudspeaker voice coil and control circuit board's electric connection, sound production device in this scheme need not to set up the inside structure that has the electric conductor and make its volume very huge electrically conductive centering disk that needs set up, and direct first vibrating diaphragm and the second vibrating diaphragm that is less through the volume can realize that each voice coil loudspeaker voice coil and control circuit board's electricity is connected now can. The structure of the sounding device can be simplified, the whole volume of the sounding device can be reduced, and the convenience of the subsequent sounding device in the limited space can be improved. Meanwhile, the arrangement also enables the magnetic circuit system of the sound production device in the scheme to be free from the avoidance space which is required to be arranged on the large-size conductive centering piece like the magnetic circuit system of the sound production device in the traditional scheme, and avoids the magnetic performance which influences the magnetic circuit system due to the overlarge avoidance space, so that the magnetic circuit system of the sound production device is ensured to have stronger magnetic performance.

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 view of a sound module according to an embodiment of the present invention;

FIG. 2 is another schematic view of the sound module shown in FIG. 1;

FIG. 3 is a cross-sectional view of the speaker module of FIG. 1;

FIG. 4 is a schematic structural diagram of the sound device according to an embodiment of the present invention;

FIG. 5 is an exploded view of the sounder device of FIG. 4;

FIG. 6 is a schematic view of the first sound generating unit shown in FIG. 5;

FIG. 7 is a schematic view of the first sound generating unit of FIG. 5 from another perspective;

FIG. 8 is an exploded view of the sounder device of FIG. 5;

fig. 9 is a schematic view of the second sound unit in fig. 8;

FIG. 10 is a schematic view of another perspective of the second sound generating unit of FIG. 8;

fig. 11 is a partial schematic view of the sound producing device of fig. 5.

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 all the directional indications in the embodiments of the present invention are only used to explain the relative position relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are 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, 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.

Referring to fig. 1 to 5, the present invention provides a sound generating device 10. In an embodiment of the present invention, the sound generating device 10 includes a first sound generating unit 11 and a second sound generating unit 13; the first sound generating unit 11 includes a first diaphragm 111 and a first voice coil 118, the second sound generating unit 13 includes a second diaphragm 131 and a second voice coil 136, the first diaphragm 111 and the second diaphragm 131 are respectively located on two opposite sides of the sound generating device 10, and the first voice coil 118 and the second voice coil 136 are respectively electrically connected to the same control circuit board 15; the control circuit board 15 is provided on one side of the first sound emitting unit 11, or the control circuit board 15 is provided on one side of the second sound emitting unit 13; the first diaphragm 111 includes a first diaphragm main body 112 and a first conductive trace 115 integrally formed with the first diaphragm main body 112, one end of the first conductive trace 115 is electrically connected to a lead of the first voice coil 118, and the other end is electrically connected to the control circuit board 15; the second diaphragm 131 includes a second film body 132 and a second conductive trace 133 integrally formed with the second film body 132, and one end of the second conductive trace 133 is electrically connected to a lead of the second voice coil 136 and the other end is electrically connected to the control circuit board 15.

The sound production device 10 comprises an upper surface provided with a first vibrating diaphragm 111 and a lower surface provided with a second vibrating diaphragm 131, and the control circuit board 15 is arranged on one side of the first sound production unit 11, namely on the upper surface of the sound production device 10; alternatively, the control circuit board 15 is disposed on one side of the second sound generating unit, i.e., on the lower surface of the sound generating device 10.

In an embodiment of the present invention, both the first sound generating unit 11 and the second sound generating unit 13 can be used for generating sound, specifically: the sound emitting device 10 may further include a magnetic circuit 17 disposed between the first sound emitting unit 11 and the second sound emitting unit 13, the magnetic circuit 17 being formed with a first magnetic gap 171 and a second magnetic gap 172 on a side facing the first sound emitting unit 11 and a first side facing the second sound emitting unit 13, respectively. At this time, the first sound generating unit 11 and the second sound generating unit 13 may share one magnetic circuit system 17, so that the number of the magnetic circuit systems 17 is reduced to facilitate simplification of the structure of the sound generating device 10, thereby facilitating improvement of convenience of molding. Meanwhile, the thickness of the sound production device 10 can be greatly reduced because one magnetic circuit is shared. Of course, it should be noted that the present application is not limited thereto, and the sound generating device 10 may also be configured by providing two independent magnetic systems 17 to form the first magnetic gap 171 and the second magnetic gap 172, respectively. Further, the first voice coil 118 of the first sound emitting unit 11 may be inserted into the first magnetic gap 171 at an end away from the first diaphragm 111. Thus, a fixed magnetic field can be provided for the first voice coil 118 through the first magnetic gap 171, and the first voice coil 118 of the first sound generating unit 11 is acted by an ampere force in the fixed magnetic field at the first magnetic gap 171 after being energized, so as to drive the first voice coil 118 to vibrate along the axial direction thereof. The first voice coil 118 is fixed on the first diaphragm 111, so that the first diaphragm 111 vibrates along with the first voice coil 118 to realize the vibration sound production of the first sound-producing unit 11. Likewise, the second voice coil 136 of the second sound emitting unit 13 may be inserted into the second magnetic gap 172 at an end away from the second diaphragm 131. Thus, a fixed magnetic field can be provided for the second voice coil 136 through the second magnetic gap 172, and then the second voice coil 136 of the second sound generating unit 13 is acted by an ampere force in the fixed magnetic field at the second magnetic gap 172 after being energized, so as to drive the second voice coil 136 to vibrate along the axial direction thereof. The second voice coil 136 is fixed on the second diaphragm 131, so that the second diaphragm 131 can vibrate along with the second voice coil 136 to realize the vibration sound generation of the second sound generating unit 13. Further, in an embodiment of the present invention, the first sound generating unit 11 and the magnetic circuit system 17 may enclose and form a first rear cavity 123, the second sound generating unit 13 and the magnetic circuit system 17 enclose and form a second rear cavity 141, and the second rear cavity 141 is isolated from the first rear cavity 123. At this moment, when the first sound generating unit 11 and the second sound generating unit 13 work, the airflows in the first rear cavity 123 and the second rear cavity 141 cannot interfere with each other in the flowing process, so that the first sound generating unit 11 and the second sound generating unit 13 can work normally and stably respectively, and the possibility of a series of problems such as nonlinear distortion rising and swinging vibration abnormal sound caused by the influence on the respective vibration states of the first sound generating unit 11 and the second sound generating unit 13 can be avoided, thereby ensuring the sound generating effect of the electronic device. The first sound emitting unit 11 may further include a first frame 120 on the basis of the first diaphragm 111 and the first voice coil 118. At this time, the first film main body 112 of the first diaphragm 111 can be conveniently fixed to the first frame 120, and encloses with the first frame 120 and the side of the magnetic circuit system 17 where the first magnetic gap 171 is formed to form the first back cavity 123. Similarly, the second sound generating unit 13 may further include a second frame 138 on the basis of the second diaphragm 131 and the second voice coil 136. At this time, the second film main body 132 of the second diaphragm 131 can be conveniently fixed to the second frame 138, and encloses with the second frame 138 and the side of the magnetic circuit system 17 where the second magnetic gap 172 is formed to form the second back cavity 141. In addition, the first film body 112 of the first diaphragm 111 may serve as a body structure of the diaphragm, and the first conductive trace 115 integrally formed with the first film body 112 may be used for performing a conductive function to electrically connect the first voice coil 118 connected to the first diaphragm 111 and the control circuit board 15. It should be noted that, the first conductive traces 115 and the first film main body are integrally formed, that is, the first conductive traces 115 and the first film main body are integrally formed, and the specific forming manner may be that the first conductive traces 115 are disposed on the surface of the first film main body 112 or disposed inside the first film main body 112. The first conductive traces 115 are made of a conductive material, and are ensured to be a conductive layer on the first film body 112. Similarly, the second conductive traces 133 and the second film main body 132 are integrally formed, that is, the second conductive traces 133 and the second film main body 132 are integrally formed, and the specific forming manner may be that the second conductive traces 133 are disposed on the surface of the second film main body 132 or disposed inside the first film main body 112. The second conductive traces 133 are made of a conductive material, and are ensured to be a conductive layer on the second film main body 132. In addition, the first voice coil 118 of the first sound generating unit 11 and the voice coil of the second sound generating unit 13 are electrically connected to the same control circuit board 15 through the first diaphragm 111 and the second diaphragm 131, respectively, so that the number of the control circuit boards 15 can be simplified, thereby being beneficial to further simplifying the structure of the sound generating device 10.

According to the sound production device 10, the first sound production unit 11 and the second sound production unit 13 are arranged, so that two sound waves emitted by the first sound production unit 11 and the second sound production unit 13 can be utilized. At this time, when the two sound waves have the same phase, they may be superimposed to perform a reinforcing function, so that the stereo effect of the sound generating device 10 in the sound play mode can be improved. When the two sound waves have opposite phases, the two sound waves with opposite phases can be offset to play a role in attenuation based on the principle of the acoustic dipole effect, so that the privacy protection effect of the sound production device 10 in the earphone conversation mode can be improved.

Also, the first diaphragm 111 in the first sound emitting unit 11 of the sound emitting device 10 in this embodiment includes a first diaphragm main body 112 and a first conductive trace 115 integrally formed with the first diaphragm main body 112, and the second diaphragm 131 in the second sound emitting unit 13 includes a second diaphragm main body 132 and a second conductive trace 133 integrally formed with the second diaphragm main body 132. In this way, the first voice coil 118 in the first sound generating unit 11 can be electrically connected to the control circuit board 15 through the first conductive trace 115 on the first diaphragm 111, and similarly, the second voice coil 136 in the second sound generating unit 13 can be electrically connected to the control board through the second conductive trace 133 on the second diaphragm 131. That is to say, the first diaphragm 111 and the second diaphragm 131 of the sound generating device 10 in this embodiment have conductive properties and can be directly used to electrically connect the first voice coil 118 and the control circuit board 15, and the second voice coil 136 and the control circuit board 15. Compared with the conventional sound device 10 in which a conductive centering pad is used to electrically connect the voice coil and the control circuit board 15, the sound device 10 in this embodiment does not need to have a structure in which a conductive body is disposed inside the sound device to make the volume of the sound device larger than that of the conductive centering pad, and can directly electrically connect each voice coil and the control circuit board 15 through the first vibrating diaphragm 111 and the second vibrating diaphragm 131 having smaller volumes. The structure of the sound device 10 can be simplified to reduce the overall volume of the sound device 10, thereby facilitating the convenience of installing the subsequent sound device 10 in a limited space. Meanwhile, due to the arrangement, the magnetic circuit system 17 of the sound generating device 10 in the scheme does not need to be provided with an avoidance space for the bulky conductive centering piece like the magnetic circuit system 17 of the traditional sound generating device 10, and the magnetic performance of the magnetic circuit system 17 is avoided being influenced due to the arrangement of the overlarge avoidance space, so that the magnetic circuit system 17 of the sound generating device 10 is ensured to have stronger magnetic performance.

Referring to fig. 1, 2, 4 and 5, in an embodiment of the present invention, the control circuit board 15 is led out from a side position of the sound generating device 10; the control circuit is led out from the long axis side of the sound generating device 10, or the control circuit is led out from the short axis side of the sound generating device 10.

It can be understood that, the control circuit board 15 is led out from a side edge of the sound generating device 10, so that the control circuit board 15 and the first diaphragm 111 of the first sound generating unit 11 and the second diaphragm 131 of the second sound generating unit 13 are relatively close to each other, thereby being beneficial to improving the convenience of electrical connection between the first diaphragm 111 of the first sound generating unit 11 and the control circuit board 15, and between the second diaphragm 131 of the second sound generating unit 13 and the control circuit board 15. Moreover, since the first sound generating unit 11 and the second sound generating unit 13 are also back-to-back, the control circuit board 15 is disposed at the side position of the sound generating device 10, so that the sound generating positions of the first sound generating unit 11 and the second sound generating unit 13 can be better avoided. The control circuit is led out from the long axis side of the sound generating device 10, or from the short axis side of the sound generating device 10.

Referring to fig. 5 to 7, in an embodiment of the invention, the first voice coil 118 has two first leads 119, the first conductive trace 115 includes a first trace portion 116 and a second trace portion 117 that are electrically insulated, and the first trace portion 116 and the second trace portion 117 are both combined on a surface of the first film main body 112 facing the first voice coil 118; one ends of the first and

second circuit portions

116 and 117 are electrically connected to the two first leads 119, respectively, and the other ends are electrically connected to the control circuit board 15, respectively.

It is understood that, since the first voice coil 118 has two first leads 119, the first conductive traces 115 are correspondingly disposed as two electrically insulated first trace portions 116 and second trace portions 117, so that the first conductive traces 115 can be in electrical connection with the two first leads 119 of the first voice coil 118 by the first trace portions 116 and the second trace portions 117, respectively.

Referring to fig. 6 and fig. 7, in an embodiment of the present invention, two first leads 119 are respectively led out from a side of the first voice coil 118 corresponding to the control circuit board 15 and a side away from the control circuit board 15; one end of the first circuit portion 116 is electrically connected to one first lead 119, and the other end is electrically connected to the control circuit board 15; one end of the second line portion 117 is electrically connected to the other first lead 119, and the other end extends to the edge of the first film main body 112, and then is led out from the edge of the first film main body 112 to one side of the control circuit board 15, and is electrically connected to the control circuit board 15.

It can be understood that two first leads 119 are respectively led out from one side of first voice coil 118 near control circuit board 15 and one side of keeping away from control circuit board 15 for first voice coil 118 can be close to one side of control circuit board 15 and the both sides of keeping away from one side of circuit board distribute comparatively evenly, thereby be favorable to improving this first voice coil 118's dynamic balance, and then guarantee the effect that first membrane main part 112 vibrated the sound thereupon. Further, the first circuit portion 116 extends along a side facing the control circuit board 15, and the second circuit portion 117 extends to an edge of the first body, and then is led out to a side of the control circuit board 15 to be electrically connected to the control circuit board 15. Thus, the first diaphragm 111 is electrically connected to the control circuit board 15 on one side, and the first circuit portion 116 and the second circuit portion 117 of the first diaphragm 111 are distributed compactly at the electrical connection position with the control circuit board 15, so that the control circuit board 15 is conveniently electrically connected to the first diaphragm 111, and the volume that can be set is relatively small, so as to further reduce the overall volume of the sound generating device 10. Further, referring to fig. 7, after the end of the second circuit portion 117 away from the first lead 119 extends to the edge of the side of the first film main body 112 away from the control circuit board 15, the end extends to the side of the first film main body 112 where the control circuit board 15 is disposed along the edge track of the first film main body 112 on the first film main body 112. At this time, the second line portions 117 are arranged along the edge track of the first film main body 112, and the lines can be made regular respectively, which is advantageous for improving the convenience of disposing the second line portions 117 on the second film main body 132. Furthermore, the first sound emitting unit 11 generally further includes a first frame 120, and an edge of the first membrane main body 112 of the first diaphragm 111 may be fixed to the first frame 120. This makes it possible for the second line portion 117 to be distributed in the joint area of the first film main body 112 and the first frame body 120, so as to reduce the influence on the vibration area of the first film main body. Of course, the present application is not limited thereto, and in other embodiments, when the volume of the control circuit board 15 is relatively large and surrounds the opposite sides of the first film body 112, the first circuit portion 116 and the second circuit portion 117 may be electrically connected to the two first leads 119 on the opposite sides of the first voice coil 118 and then respectively extend to the opposite sides of the first film body 112.

Referring to fig. 6 and 7, in an embodiment of the invention, an extending portion 113 is disposed on a side of the first film main body 112 close to the control circuit board 15, the extending portion 113 is disposed with a first circuit portion 116 and a second circuit portion 117 that are insulated from each other, and the control circuit board 15 is electrically connected to the first circuit portion 116 and the second circuit portion 117 on the extending portion 113.

It can be understood that the first film main body 112 can provide a connection position for the control circuit board 15 through the extension portion 113 protruding from one side of the first film main body, so that when the control circuit board 15 is electrically connected to the first diaphragm 111, the control circuit board 15 does not interfere with other structures of the first sound emitting unit 11 (for example, the first frame 120 of the first sound emitting unit 11, in this case, the extension portion 113 can extend to the outside of the first frame 120 through the first frame 120) to affect the connection therebetween. Further, the extension portion 113 may have a gap 114 between the first line portion 116 and the second line portion 117, so that when the conductive adhesive is applied, the applied area may be better isolated by the gap 114 to avoid short circuit.

Referring to fig. 8 to 10, in an embodiment of the present invention, the second voice coil 136 has two second leads 137, the second conductive trace 133 includes a third trace portion 134 and a fourth trace portion 135 that are electrically insulated, and the third trace portion 134 and the fourth trace portion 135 are both combined on the surface of the second film main body 132 facing the second voice coil 136, and one ends of the third trace portion 134 and the fourth trace portion 135 are electrically connected to the two second leads 137, respectively, and the other ends are electrically connected to the control circuit board 15, respectively.

It is understood that, since the second voice coil 136 has two second leads 137, the second conductive traces 133 are correspondingly disposed as two electrically isolated third trace portions 134 and fourth trace portions 135, so that the second conductive traces 133 can be electrically connected with the two second leads 137 of the second voice coil 136 in a fitting manner through the third trace portions 134 and the fourth trace portions 135, respectively.

Referring to fig. 9 and 10, in an embodiment of the present invention, two second leads 137 are led out from two corner portions of one side of the second voice coil 136 corresponding to the control circuit board 15; one ends of the third and

fourth circuit portions

134 and 135 are electrically connected to the two second leads 137, respectively, and the other ends extend to the two corner regions of the second film main body 132, respectively, and are electrically connected to the control circuit board 15.

It is understood that the ends of the third and

fourth circuit portions

134 and 135, which are away from the second voice coil 136, are electrically connected to extend to two corner regions of the second film main body 132, respectively, so that the third and

fourth circuit portions

134 and 135 have a certain distance from two electrical connection ends of the control circuit board 15. At this time, the two electrical connection sites on the control circuit board 15 corresponding to the third line portion 134 and the fourth line portion 135 also have a certain pitch so that two electrical connection sites for electrically connecting the first line portion 116 and the second line portion 117 are provided between the two electrical connection sites for electrically connecting the third line portion 134 and the fourth line portion 135. Meanwhile, the third circuit portion 134 and the fourth circuit portion 135 are extended at two corner portions corresponding to the second voice coil 136 and the second diaphragm 131, so that the wiring paths required by the third circuit portion 134 and the fourth circuit portion 135 are short, and the manufacturing cost is reduced. It should be understood that, the present application is not limited thereto, and in other embodiments, when the control circuit board 15 is disposed on the long axis side or the short axis side of the sound generating device 10, the second leads 137 are led out from the two opposite short axes or long axes, respectively, and extend to the edge of the second film main body 132, and then extend from the edge of the second film main body 132 to one side of the control circuit board 15, and are electrically connected to the control circuit board 15. That is, when the control circuit board 15 is disposed on the long axis of the sound generating device 10, the second leads 137 may be led out from the two short axes correspondingly, and extend to the edge of the second film main body 132, and then extend from the edge of the second film main body 132 to one side of the control circuit board 15, and are electrically connected to the control circuit board 15. When the control circuit board 15 is disposed on the short axis of the sound generating device 10, the second leads 137 are led out from the two opposite long axes, extend to the edge of the second film main body 132, extend from the edge of the second film main body 132 to one side of the control circuit board 15, and are electrically connected to the control circuit board 15.

Referring to fig. 5 and 8, in an embodiment of the invention, the second sound generating unit 13 further includes a second frame 138, the second frame 138 is fixedly combined with the second film main body 132, a corner of the second frame 138 is provided with a supporting portion 139, and the supporting portion 139 extends to one side of the first sound generating unit 11; two conductive inserts 140 are embedded in the supporting portion 139 of the second frame 138, one end of each of the two conductive inserts 140 is electrically connected to the third circuit portion 134 and the fourth circuit portion 135, and the other end is electrically connected to the control circuit board 15.

It can be understood that, the conductive insert 140 is disposed on the supporting portion 139 of the second frame 138, and the second conductive trace 133 and the control circuit board 15 are respectively electrically connected through two opposite ends of the conductive insert 140, so that the second conductive trace 133 can be guided to one side of the first sound emitting unit 11, so that the second conductive trace 133 and the first conductive trace 115 can be conveniently electrically connected to the same control circuit board 15, thereby facilitating the improvement of the convenience of the control circuit electrically connected to the first conductive trace 115 and the second conductive trace 133. The first conductive traces 115 can be electrically connected to one surface of the control circuit board 15, and an end of the conductive insert 140 away from the second conductive traces 133 can be electrically connected to the other surface of the control circuit board 15 opposite to the first conductive trace, so as to further improve the compactness of the distribution.

In one embodiment of the present invention, each of the conductive inserts 140 includes a connecting portion and first and second pads disposed at opposite ends of the connecting portion; two first pads of the two conductive inserts 140 are electrically connected to the third and

fourth circuit portions

134 and 135, respectively, and two second pads are electrically connected to the control circuit board 15.

It will be appreciated that the conductive insert 140 may preferably provide a connection location through the first bonding pad to facilitate electrical connection between the conductive insert 140 and the second conductive trace 133. Similarly, a connection site may also be preferably provided by the second pad to facilitate electrical connection of the conductive insert 140 to the control circuit board 15.

In an embodiment of the present invention, the control circuit board 15 is disposed on one of the short axis sides of the sound generating device 10, and the control circuit board 15 is a flexible circuit board.

It can be understood that the control circuit board 15 is disposed on one of the short axis sides of the sound generating device 10, so that the space on the short axis of the sound generating device 10 can be utilized more, thereby avoiding the over-length of the sound generating device 10 and the over-volume thereof. And the control circuit board 15 is a flexible circuit board, so that the control circuit board 15 can be bent and mounted adaptively due to certain flexibility, thereby being beneficial to further improving the convenience of electrical connection between the control circuit board 15 and the first and

second diaphragms

111 and 131.

Referring to fig. 3, in an embodiment of the present invention, a projection plane parallel to the first sound unit 11 and the second sound unit 13 is defined, an orthographic projection area of the first sound unit 11 is smaller than an orthographic projection area of the second sound unit 13, and the control circuit board 15 is disposed on one side of the first sound unit 11.

It can be understood that the orthographic projection area of the first sound emitting unit 11 is smaller than the orthographic projection area of the second sound emitting unit 13, so that the first sound emitting unit 11 can emit relatively small sound because the projection area of the first sound emitting unit 11 is relatively small, and further, the first sound emitting unit 11 has higher privacy protection performance in the working mode of carrying out the earphone conversation. The control circuit board 15 is disposed on one side of the first sound emitting unit 11, so that the space on one side of the first sound emitting unit 11 can be more fully facilitated, the distribution compactness of the control circuit, the first sound emitting unit 11 and the second sound emitting unit 13 can be improved, and the whole volume of the sound emitting device 10 can be relatively small.

In an embodiment of the present invention, the lead of the first voice coil 118 and the first conductive trace 115, and the lead of the second voice coil 136 and the second conductive trace 133 are electrically connected through a conductive adhesive; the first conductive trace 115 and the second conductive trace 133 are electrically connected to the control circuit board 15 through conductive adhesive.

It can be understood that the lead of the first voice coil 118 and the first conductive trace 115, and the lead of the second voice coil 136 and the second conductive trace 133 are all electrically connected through conductive glue, and the electrical connection process is simple, and the electrical connection can be completed by directly bonding the conductive glue. Meanwhile, the arrangement does not damage the structure of the lead wire of the first voice coil 118 and the first conductive trace 115, and the lead wire of the second voice coil 136 and the second conductive trace 133 due to the arrangement of the electrical connection structure. Similarly, the first conductive trace 115 and the second conductive trace 133 may be electrically connected to the control circuit board 15 by conductive adhesive, so as to simplify the electrical connection process and avoid damage to the structure of the electrical connection object itself. Of course, the present application is not limited thereto, and in other embodiments, the leads of the first voice coil 118 and the first conductive traces 115, and the leads of the second voice coil 136 and the second conductive traces 133 may be electrically connected by soldering, and the leads of the first conductive traces 115 and the second conductive traces 133 and the control circuit board 15 may be electrically connected by soldering.

Referring to fig. 1 to 4, the present invention further provides a sound module 100, where the sound module 100 includes a sound device 10 and a fixed housing 30, and the specific structure of the sound device 10 refers to the above embodiments, and since the sound module 100 adopts all technical solutions of all the above embodiments, the sound module at least has all the beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein. The sounding device 10 is arranged in the fixed shell 30, and the fixed shell 30 and the sounding device 10 enclose to form an expansion cavity 31; the first rear cavity 123 of the sound generating device 10 is isolated from the expansion cavity 31 and is communicated with the external space of the sound generating module 100, and the second rear cavity 141 is communicated with the expansion cavity 31.

It can be understood that the expansion cavity 31 is formed by enclosing the fixed casing 30 and the sound generating device 10, so that the expansion cavity 31 can be used for expanding the second rear cavity 141, it is ensured that the air pressure change in the second rear cavity 141 can be adjusted through the expansion cavity 31, the influence on the amplitude of the second diaphragm 131 caused by the overlarge air pressure in the second rear cavity 141 is avoided, and the influence on the sound sensitivity of the second sound generating unit 13 is avoided. That is, the resistance of the second diaphragm 131 of the second sound generating unit 13 during vibration is greatly reduced by the arrangement of the expansion cavity 31, and the smoothness of the vibration of the second diaphragm 131 is improved, so that the acoustic performance of the second sound generating unit 13 can be ensured. Similarly, the first rear cavity 123 of the first sound generating unit 11 is communicated with the external space of the sound generating module 100, so that the first rear cavity 123 can be communicated with the external air pressure, and it is ensured that the air pressure change in the first rear cavity 123 can also be adjusted through the external space of the sound generating module 100, thereby avoiding the influence on the amplitude of the first diaphragm 111 due to the excessive air pressure in the first rear cavity 123. That is, the communication with the external space of the sound module 100 can prevent the first diaphragm 111 of the first sound emitting unit 11 from receiving too much resistance in the vibration process, thereby being beneficial to improving the smoothness of the vibration of the first diaphragm 111 and ensuring the acoustic performance of the first sound emitting unit 11. Moreover, since the second rear cavity 141 of the second sound generating unit 13 is communicated with the expansion cavity 31 of the sound generating module 100 itself, and the first rear cavity 123 of the first sound generating unit 11 is communicated with the external space of the sound generating module 100, after the sound generating module 100 is installed in the installation cavity of the housing of the electronic device, the second rear cavity 141 of the second sound generating unit 13 is also only communicated with the expansion cavity 31, and only the first rear cavity 123 of the first sound generating unit 11 can be communicated with the installation cavity of the housing of the electronic device because of being communicated with the external space of the sound generating module 100. At this moment, when the first sound generating unit 11 and the second sound generating unit 13 are working, the airflow driven by the second sound generating unit 13 cannot transmit the airflow vibration to the installation cavity of the housing, and only flows into the expansion cavity 31 formed in the sound generating module 100 itself, and only the airflow driven by the first sound generating unit 11 can cause collision in the installation cavity of the housing of the electronic device. At this time, because the orthographic projection size of the first sound emitting unit 11 is relatively small, the amplitude of the airflow vibration driven by the first sound emitting unit 11 is relatively small, and further when the airflow vibration driven by the first sound emitting unit 11 is transmitted into the installation cavity of the housing, the impact amplitude on the housing is also very small, so that the possibility that the use experience is influenced due to the vibration generated by the housing of the electronic device is avoided.

The first frame 120 of the first sound generating unit 11 may extend to the outside through the fixed housing 30, and is provided with a first through hole 121 that is laterally communicated, so as to communicate the first rear cavity 123 with the external space of the sound generating module 100 through the first through hole 121. Further, the understanding of the isolation of the first rear chamber 123 from the flash chamber 31 is explained as follows: the first rear cavity 123 and the expansion cavity 31 separated by a high distance in the present application mean that there is no communicating structure directly communicating the first rear cavity 123 and the expansion cavity 31 in the structure of the sound module 100 itself. Generally, the expansion chamber 31 can be provided with a pressure relief hole (or a pressure equalizing hole, or a leakage hole) for equalizing pressure, the pressure relief hole can lead part of the airflow in the expansion chamber 31 into the external/electronic device, and the airflow of the first rear chamber 123 can also be directly led into the external/electronic device, but the pressure relief hole at this moment is not communicated with the communicating structure of the first rear chamber 123 and the expansion chamber 31 for the following reasons: 1. the technical problem to be solved by the application is that when two sets of vibration systems are both communicated with the rear cavity, the problem of air flow interference is caused, and the scheme of communicating through the pressure relief hole obviously has no problem of air flow interference, does not belong to the scheme that two sets of vibration systems are both communicated with the rear cavity, but belongs to the scheme that the first rear cavity 123 is isolated from the expansion cavity 31 after the improvement of the application; 2. the back cavity pressure relief holes are used for pressure equalization and are used for realizing micro communication between air pressure in the expansion cavity 31 and external air pressure, and in order not to influence the listening sensitivity, damping mesh cloth needs to be bonded at the pressure equalization holes to provide certain acoustic resistance; in this embodiment, the first communicating hole 121 of the first frame body 120 needs to realize smooth communication between the first rear cavity 123 and the external air flow, and does not need to be provided with damping mesh cloth; it can be seen that the pressure equalizing holes and the first communication holes 121 of the present application function differently from each other.

Further, referring to fig. 3, 5 and 11 in combination, a communicating structure for communicating the second back cavity 141 of the second sound generating unit 13 with the expansion cavity 31 may be provided on the magnetic circuit system 17. Specifically, the magnetic circuit system 17 may include a magnetic conductive assembly 173 and a magnet assembly 176, where the magnetic conductive assembly 173 includes a first magnetic conductive plate 174 and a second magnetic conductive plate 175, and the first magnetic conductive plate 174 and the second magnetic conductive plate 175 are disposed at an opposite interval; the magnet assembly 176 is disposed between the first magnetic conductive plate 174 and the second magnetic conductive plate 175, the magnet assembly 176 includes an inner magnet 177, a middle magnet 178 and an outer magnet 179, the middle magnet 178 surrounds the outer side of the inner magnet 177 and is spaced apart from the inner magnet 177 to form a first magnetic gap 171, the outer magnet 179 surrounds the outer side of the middle magnet 178 and is spaced apart from the middle magnet 178 to form a second magnetic gap 172; the external magnet 179 may be provided with a second communication hole 179a that is laterally communicated, and the second communication hole 179a communicates the second magnetic gap 172 with the expansion chamber 31 so that the expansion chamber 31 communicates with the second back chamber 141 through the second magnetic gap 172. At this time, the expansion cavity 31 is communicated with the second back cavity 141 through the second magnetic gap 172, and the second magnetic gap 172 is disposed opposite to the second diaphragm 131 of the second sound generating unit 13, so that the airflow in the second back cavity 141 can be in the same vibration direction of the second diaphragm 131 when the airflow is driven by the second diaphragm 131 to flow. Specifically, when being compressed by the second diaphragm 131, the airflow in the second back cavity 141 can smoothly enter the second magnetic gap 172 along the vibration direction of the second diaphragm 131, and finally smoothly enter the expansion cavity 31. When the airflow in the second back cavity 141 is expanded by the second diaphragm 131, the airflow in the expansion cavity 31 firstly enters the second magnetic gap 172 toward the second diaphragm 131, and then can enter the second back cavity 141 more smoothly along the vibration direction of the second diaphragm 131. That is, the expansion cavity 31 is communicated with the second back cavity 141 through the second magnetic gap 172, which is beneficial to improving the smoothness of the airflow flowing between the second back cavity 141 and the expansion cavity 31, and further ensures the vibration performance of the second diaphragm 131. Further, the first magnetic conductive plate 174 may further have a third communication hole 174a at a position corresponding to the second communication hole 179a, so that the second communication hole 179a and the expansion chamber 31 are communicated through the third communication hole 174a, thereby improving the pressure equalizing effect of the expansion chamber 31 on the air pressure in the second rear chamber 141. It should be noted that, the present application is not limited thereto, and in other embodiments, the second frame 138 may be provided with an opening for laterally communicating the second rear cavity 141 and the expansion cavity 31.

It should be further noted that the inner magnet 177 of the magnetic circuit 17 may be square, circular, or track-shaped, so that the shape is relatively regular and easy to machine. Of course, other shapes are possible. That is, the present application does not limit the specific shape of the inner magnet 177, and the specific shape may be adaptively set according to the shape of the first voice coil 118 of the first sound emitting unit 11, so as to better accommodate the first voice coil 118. The middle magnet 178 may have a closed ring structure to directly block the first and second

magnetic gaps

171 and 172. In addition, the middle magnet 178 is an integral component, which facilitates the installation in one step and improves the convenience of installation. Of course, the present application is not limited thereto, and in other embodiments, the middle magnet 178 may also be a plurality of magnetic strips arranged at intervals, and in this case, a filler is arranged between the two adjacent magnetic strips to ensure that the first magnetic gap 171 and the second magnetic gap 172 can be separated. Since the external magnet 179 does not need to provide a function of isolating the first magnetic gap 171 and the second magnetic gap 172, the external magnet 179 may have a closed ring structure, and then the second communication hole 179a that is laterally conducted may be opened. Certainly, the magnetic strips can be arranged at intervals, and at this time, the second communication hole 179a can be formed by enclosing two adjacent magnetic strips, so that the structure of each external magnet 179 is simple and is convenient for processing and molding, and the second communication hole 179a can be formed by enclosing after being installed in place without opening holes.

Referring to fig. 3, the first magnetic plate 174 and the second magnetic plate 175 of the magnetic conductive assembly 173 can be used to clamp the fixed magnet assembly 176, so that the inner magnet 177, the middle magnet 178 and the outer magnet 179 can be easily assembled together. Meanwhile, the magnetic performance can be enhanced by the first magnetic conductive plate 174 and the second magnetic conductive plate 175, so that the driving performance of the magnetic circuit system 17 for the first sound generating end and the second sound generating unit 13 can be improved, and the acoustic performance of the first sound generating unit 11 and the second sound generating unit 13 can be ensured. The first magnetic conductive plate 174 may be stacked on the surfaces of the inner magnet 177, the middle magnet 178, and the outer magnet 179 facing the first sound emitting unit 11. Moreover, the first magnetic conductive plate 174 may include a first inner magnetic conductive plate stacked on the inner magnet 177 and a first outer magnetic conductive plate stacked on the middle magnet 178 and the outer magnet 179, and the first voice coil 118 of the first sound emitting unit 11 may be inserted into the first magnetic gap 171 through a space between the first inner magnetic conductive plate and the first outer magnetic conductive plate. Therefore, the first magnetic-conductive plate 174 may be composed of two independent parts, i.e., a first inner magnetic-conductive plate and a first outer magnetic-conductive plate, so that the first inner magnetic-conductive plate and the first outer magnetic-conductive plate have a higher degree of freedom in manufacturing. That is, the first inner magnetic conductive plate and the first outer magnetic conductive plate can be separately and independently manufactured, and can be independently selected in material selection and processing technology. And the second magnetic conductive plate 175 may be stacked on the surfaces of the inner magnet 177, the middle magnet 178, and the outer magnet 179 facing the second sound emitting unit 13. Also, the second magnetic conductive plate 175 may include a second inner magnetic conductive plate stacked on the inner magnet 177 and the middle magnet 178 and a second outer magnetic conductive plate stacked on the outer magnet 179, and the second voice coil 136 of the second sound emitting unit 13 may be inserted into the second magnetic gap 172 through a space between the second inner magnetic conductive plate and the second outer magnetic conductive plate. Therefore, the second magnetic conductive plate 175 may be composed of two independent parts, i.e., a second inner magnetic conductive plate and a second outer magnetic conductive plate, so that the second inner magnetic conductive plate and the second outer magnetic conductive plate have a higher degree of freedom in manufacturing. That is, the second inner magnetic conductive plate and the second outer magnetic conductive plate can be separately and independently manufactured, and can be independently selected in material selection and processing technology. In addition, it should be further noted that the first frame body 120 and the first magnetic conductive plate 174 may be an integral structure, or may be two separate components that are independently disposed.

The present invention further provides an electronic device, which includes a casing and a sound generating device 10, and the specific structure of the sound generating device 10 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, a mounting cavity is formed in the casing, the sound generating device 10 is arranged in the mounting cavity, and the first rear cavity 123 of the sound generating device 10 is communicated with the mounting cavity of the casing.

The present invention further provides an electronic device, which includes a housing and a sound generating module 100, and the specific structure of the sound generating module 100 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, a mounting cavity is formed in the casing, the sound generating device 10 of the sound generating module 100 is arranged in the mounting cavity, and the first rear cavity 123 of the sound generating device 10 is communicated with the mounting cavity of the casing.

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. The sounding device is characterized by comprising a first sounding unit and a second sounding unit;

the first sounding unit comprises a first vibrating diaphragm and a first voice coil, the second sounding unit comprises a second vibrating diaphragm and a second voice coil, the first vibrating diaphragm and the second vibrating diaphragm are respectively positioned on two sides of the sounding device, which are back to back, and the first voice coil and the second voice coil are respectively electrically connected with the same control circuit board; the first diaphragm comprises a first diaphragm main body and a first conducting circuit integrally formed with the first diaphragm main body, one end of the first conducting circuit is electrically connected with a lead of the first voice coil, and the other end of the first conducting circuit is electrically connected with the control circuit board;

the control circuit board is arranged on one side of the first sound generating unit, or the control circuit board is arranged on one side of the second sound generating unit.

2. The sound device of claim 1, wherein the control circuit board leads from a lateral position of the sound device;

3. The sound device of claim 1, wherein the first voice coil has two first leads, the first conductive trace includes electrically isolated first and second trace portions, both of the first and second trace portions being bonded to a surface of the first diaphragm body facing the first voice coil;

4. The sound production device of claim 3, wherein two first leads respectively lead out from a side of the first voice coil corresponding to the control circuit board and a side far away from the control circuit board;

5. The sound production device of claim 4, wherein an end of the second circuit portion remote from the first lead extends, after extending to an edge of the first membrane body on a side remote from the control circuit board, along an edge track of the first membrane body on the first membrane body to a side of the first membrane body on which the control circuit board is disposed.

6. The sound production device as claimed in claim 4, wherein the first membrane body is provided with an extension portion on a side thereof adjacent to the control circuit board, the extension portion is provided with two mutually insulated first and second circuit portions, and the control circuit board is electrically connected to the first and second circuit portions on the extension portion.

7. The sound device of claim 1, wherein the second voice coil has two second leads, the second conductive trace includes electrically insulated third and fourth trace portions, both of which are bonded to a surface of the second diaphragm body facing the second voice coil

8. The sound production device of claim 7, wherein two of the second leads are led out from two corner portions of one side of the second voice coil corresponding to the control circuit board;

9. The sound device as claimed in claim 7, wherein the control circuit board is disposed on the long axis side or the short axis side of the sound device, and the second leads are led out from the two opposite short or long axes, respectively, and extend to the edge of the second membrane main body, and then extend from the edge of the second membrane main body to one side of the control circuit board, and are electrically connected to the control circuit board.

10. The sound production device of claim 7, wherein the second sound production unit further comprises a second frame body fixedly combined with the second membrane main body, and a corner of the second frame body is provided with a support part extending to one side of the first sound production unit;

11. The acoustic module of claim 10 wherein each of said conductive inserts includes a connecting portion and first and second pads disposed on opposite ends of said connecting portion;

12. The sound device of any one of claims 1-11, wherein the control circuit board is disposed on one of the stub axle sides of the sound device, and the control circuit board is a flexible circuit board.

13. The sound production device of claim 12, wherein a projection plane is defined parallel to the first sound production unit and the second sound production unit, the first sound production unit has an orthographic projection area smaller than that of the second sound production unit, and the control circuit board is disposed on a side of the first sound production unit.

14. The sound device of claim 12, wherein the lead of the first voice coil and the first conductive trace, and the lead of the second voice coil and the second conductive trace are electrically connected by conductive glue;

15. The sounder device according to any one of claims 1 to 11, further comprising a magnetic circuit system provided between the first sound emitting unit and the second sound emitting unit;

16. A sound generating module, comprising the sound generating device as claimed in any one of claims 1 to 15 and a fixed housing, wherein the sound generating device is disposed in the fixed housing, and the fixed housing and the sound generating device enclose to form an expansion cavity;

17. An electronic device, comprising:

the sound device as claimed in any one of claims 1 to 15, or the sound module as claimed in claim 16, wherein the first rear cavity of the sound device is in communication with the mounting cavity of the housing.