CN114979912A

CN114979912A - Sound production device and electronic equipment

Info

Publication number: CN114979912A
Application number: CN202210902781.8A
Authority: CN
Inventors: 姜龙; 蔡晓东; 郎贤忠; 刘松
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-08-30
Anticipated expiration: 2042-07-29
Also published as: CN114979912B

Abstract

The invention discloses a sound generating device and electronic equipment, and relates to the technical field of electroacoustic conversion. The invention aims to provide a sound production device with high magnetic field utilization rate, which effectively improves the BL value of a product.

Description

Sound production device and electronic equipment

Technical Field

The invention relates to the technical field of electroacoustic conversion, in particular to a sound generating device and electronic equipment using the same.

Background

With the development of the portable consumer electronics market, the miniature sound generator is widely applied, and with the multifunctional and miniaturized design of the portable terminal electronics, higher requirements are put forward on the vibration acoustic performance of the miniature sound generator.

The sounding device generally comprises a magnetic circuit system and a vibration system, wherein the vibration system comprises a vibrating diaphragm and a voice coil combined on one side of the vibrating diaphragm, and the energized voice coil can drive the vibrating diaphragm to vibrate under the action of the magnetic circuit system, so that the sounding of the sounding device is realized. However, the voice coil does not have a high utilization rate of the magnetic field generated by the magnetic circuit system, thereby reducing the BL value of the sound generating device.

Disclosure of Invention

The invention mainly aims to provide a sound generating device and electronic equipment, and aims to provide a sound generating device with high magnetic field utilization rate, which effectively improves the BL value of a product.

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

a housing;

the magnetic circuit system is connected to the shell and provided with a magnetic gap and a position avoiding hole communicated with the magnetic gap; and

the vibration system comprises a vibration diaphragm and a voice coil assembly, the vibration diaphragm is connected to one side, far away from the magnetic circuit system, of the shell and opposite to the magnetic circuit system, the vibration diaphragm is provided with a conductive layer, the voice coil assembly comprises a first voice coil and a second voice coil, one end of the first voice coil is connected with the vibration diaphragm, the other end of the first voice coil is suspended in the magnetic gap, the second voice coil is connected to one end, far away from the vibration diaphragm, of the first voice coil, at least part of the second voice coil is located in the avoiding hole, and the second voice coil is connected with the first voice coil through the conductive layer to form a series circuit.

In one embodiment, the second voice coils include two second voice coils, the two second voice coils are connected with the first voice coil through the conducting layer to form the series circuit, and the first voice coil is provided with two long shaft sides and two short shaft sides which are connected end to end;

the magnetic circuit system is provided with two avoidance holes corresponding to the two long shaft edges, the two second voice coils are respectively connected with the two long shaft edges and are symmetrically arranged, and each second voice coil is positioned in one avoidance hole; or, the magnetic circuit system is provided with two avoiding holes corresponding to the two short shaft edges, the two second voice coils are respectively connected with the two short shaft edges and are symmetrically arranged, and each second voice coil is positioned in one avoiding hole.

In one embodiment, the second voice coil includes two first sub-voice coils and two second sub-voice coils, and the two first sub-voice coils, the two second sub-voice coils and the first voice coil form the series circuit through the conductive layer;

the first voice coil is provided with two long shaft edges and two short shaft edges which are connected end to end, the magnetic circuit system corresponds to the two long shaft edges and the two short shaft edges and is provided with four avoidance holes which are arranged at intervals, the two first sub voice coils are respectively connected with the two long shaft edges and are symmetrically arranged, the two second sub voice coils are respectively connected with the two short shaft edges and are symmetrically arranged, each first sub voice coil is positioned in one avoidance hole, and each second sub voice coil is positioned in one avoidance hole.

In one embodiment, the conductive layer includes:

an input conductive layer electrically connected to an input lead of the first voice coil;

an output conductive layer electrically connected to an output lead of the second voice coil; and

a common conductive layer electrically connected to an output lead of the first voice coil and an input lead of the second voice coil.

In one embodiment, the second voice coil includes a plurality of voice coils, the conductive layer includes a series conductive layer, and the plurality of second voice coils are connected in series through the series conductive layer.

In one embodiment, the diaphragm includes a central portion, a folded ring portion surrounding the central portion, and a fixing portion disposed outside the folded ring portion, and the fixing portion is connected to the housing;

the input conducting layer and the output conducting layer respectively comprise a first conducting part, a connecting part and a second conducting part which are sequentially connected, the second conducting part is arranged on the fixing part, the connecting part is arranged on the folded ring part, and the first conducting part is arranged on the central part and is electrically connected with an input lead of the first voice coil or an output lead of the second voice coil.

In one embodiment, the common conductive layer is disposed in the central portion;

and/or the series conducting layer is arranged at the central part and is positioned at the inner side of the voice coil;

and/or, the central part is equipped with the fretwork hole, vibration system still includes the dome, the dome connect in the central part, and cover the fretwork hole.

In one embodiment, the housing is provided with a conductive insert, the conductive insert is electrically connected with one end of the conductive layer far away from the first voice coil, and the conductive insert is used for being connected with an external circuit;

and/or the conducting layer is coated on one side of the diaphragm, which faces the magnetic circuit system;

and/or the first voice coil and the second voice coil are of an integrally formed structure; or the first voice coil is connected with the second voice coil through adhesive.

In one embodiment, the magnetic circuit system comprises:

a magnetic yoke;

the central magnetic circuit part is arranged on one side of the magnetic conductive yoke facing the vibrating diaphragm; and

the side magnetic circuit part is arranged on one side of the magnetic conductive yoke facing the vibrating diaphragm and positioned outside the central magnetic circuit part, and the side magnetic circuit part is spaced from the central magnetic circuit part to enclose and form the magnetic gap;

the magnetic yoke is provided with the avoiding hole corresponding to the magnetic gap.

In one embodiment, the side magnetic path portions include a plurality of side magnetic path portions, the plurality of side magnetic path portions are arranged around the central magnetic path portion and are spaced from the central magnetic path portion to form the magnetic gap, and two adjacent side magnetic path portions are spaced to form a gap communicated with the magnetic gap;

the vibration system further comprises a centering support piece, one end of the centering support piece is connected with the shell, and the other end of the centering support piece penetrates through the notch and is connected with one side, back to the vibrating diaphragm, of the first voice coil.

In one embodiment, the central magnetic path portion and the side magnetic path portion are both magnetized in a vertical direction, and the magnetizing directions of the central magnetic path portion and the side magnetic path portion are opposite.

The invention also provides electronic equipment which comprises an equipment shell and the sound generating device, wherein the sound generating device is arranged on the equipment shell.

According to the sound generating device, the magnetic circuit system and the vibration system are arranged on the shell, so that the installation stability of the magnetic circuit system and the vibration system is improved, the magnetic circuit system is provided with the avoiding hole communicated with the magnetic gap, the voice coil assembly of the vibration system is arranged into the first voice coil and the second voice coil, one end of the first voice coil is connected with the vibrating diaphragm, the other end of the first voice coil is suspended in the magnetic gap, the second voice coil is connected to one end, far away from the vibrating diaphragm, of the first voice coil, at least part of the second voice coil is located in the avoiding hole, so that on the basis of the first voice coil, the second voice coil is used for further utilizing the magnetic field of the magnetic circuit system at the avoiding hole, the first voice coil and the second voice coil fully utilize the magnetic field generated by the magnetic circuit system, the utilization rate of the magnetic field is improved, and the BL value of the sound generating device can be improved; simultaneously, through being equipped with the conducting layer on the vibrating diaphragm for the second voice coil loudspeaker voice coil passes through the conducting layer and is connected with first voice coil loudspeaker voice coil and form series circuit, so can ensure that first voice coil loudspeaker voice coil and second voice coil loudspeaker voice coil switch on the circular telegram, and effectively avoid the unsettled setting of voice coil loudspeaker voice coil lead wire to appear the broken string risk.

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 a schematic cross-sectional view of a sound generator according to an embodiment of the present invention;

FIG. 3 is an exploded view of the sound generator according to an embodiment of the present invention;

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

FIG. 5 is a schematic structural diagram of a magnetic circuit system and a voice coil assembly according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a yoke and voice coil assembly according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a magnetic yoke according to another embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Sound producing device	3114	Connecting part
1	Outer casing	3115	Second conductive part
				2	Magnetic circuit system	3116	Common conductive layer
21	Magnetic gap	3117	Series-connected conductive layers
				22	Magnetic conductive yoke	312	Center part
221	Avoiding hole	3121	Hollow hole
				23	Central magnetic circuit part	313	Folded ring part
24	Side magnetic circuit part	314	Fixing part
				241	Gap	32	Voice coil assembly
3	Vibration system	321	First voice coil
				31	Vibrating diaphragm	3211	Long axis edge
311	Conductive layer	3212	Short shaft edge
				3111	Input conductive layer	322	Second voice coil
3112	Output conductive layer	33	Centering support plate
				3113	A first conductive part	34	Ball top

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 indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

Also, the meaning of "and/or" and/or "appearing throughout is meant to encompass three scenarios, exemplified by" A and/or B "including scenario A, or scenario B, or scenarios where both A and B are satisfied.

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

Based on the above-mentioned conception and problems, the present invention provides a sound generating device 100. It is understood that the sound generating apparatus 100 is applied to an electronic device, and the electronic device may be a mobile phone, a sound box, a computer, an earphone, a watch, a television, or the like, and is not limited herein.

Referring to fig. 1 to 7, in the embodiment of the present invention, the sound generating device 100 includes a housing 1, a magnetic circuit system 2 and a vibration system 3, wherein, the magnetic circuit system 2 is connected to the housing 1, the magnetic circuit system 2 is provided with a magnetic gap 21 and a clearance hole 221 communicating with the magnetic gap 21, the vibration system 3 comprises a vibrating diaphragm 31 and a voice coil assembly 32, the vibrating diaphragm 31 is connected to one side of the housing 1 far away from the magnetic circuit system 2, and opposite to the magnetic circuit system 2, the diaphragm 31 is provided with a conductive layer 311, the voice coil assembly 32 includes a first voice coil 321 and a second voice coil 322, one end of the first voice coil 321 is connected to the diaphragm 31, the other end of the first voice coil 321 is suspended in the magnetic gap 21, the second voice coil 322 is connected to one end of the first voice coil 321 far away from the diaphragm 31, at least part of the second voice coil 322 is located in the clearance hole 221, and the second voice coil 322 is connected with the first voice coil 321 through the conductive layer 311 to form a series circuit.

In the present embodiment, the housing 1 is used for mounting, fixing, supporting and protecting the components of the vibration system 3, the magnetic circuit system 2, and the like, that is, the housing 1 provides a mounting base for the components of the vibration system 3, the magnetic circuit system 2, and the like. It is understood that the housing 1 may be a mounting shell, a housing, or a box with a mounting cavity, that is, the housing 1 defines a receiving space, which is not limited herein. Optionally, the housing 1 has a rectangular structure, the housing 1 has two opposite long sides and two short sides, two ends of the short sides are respectively connected with the two long sides, and two ends of the long sides are respectively connected with the two short sides, so that the housing 1 defines the accommodating space.

It can be understood that, when the housing 1 is a metal part, the magnetic circuit system 2 and the housing 1 are fixed by bonding or welding. In another embodiment, when the housing 1 is formed by plastic injection molding, the side magnetic conductive plate of the magnetic circuit system 2 is first injection molded in the housing 1 as an insert, or the magnetic circuit system 2 and the housing 1 are fixed by adhesion, and then the other parts are fixed by adhesion, which is not limited herein.

In the present embodiment, the magnetic circuit system 2 is disposed in the housing space and connected to the case 1. The magnetic circuit system 2 is provided with a magnetic gap 21 and a clearance hole 221 communicating with the magnetic gap 21, the vibration system 3 includes a diaphragm 31 and a voice coil assembly 32 connected to the diaphragm 31, one end of a first voice coil 321 in the voice coil assembly 32 is connected to the diaphragm 31, the other end of the first voice coil 321 is suspended in the magnetic gap 21, a second voice coil 322 is connected to one end of the first voice coil 321 away from the diaphragm 31, at least a portion of the second voice coil 322 is located in the clearance hole 221, a conductive layer 311 is provided on a side of the diaphragm 31 facing the magnetic circuit system 2, so that the second voice coil 322 is connected to the first voice coil 321 through the conductive layer 311 to form a series circuit, so that the first voice coil 321 is conducted with an external circuit, the first voice coil 321 and the second voice coil 322 are utilized to transmit electric energy to the magnetic gap 21 and the clearance hole 221 of the magnetic circuit system 2, so that a magnetic field generated by the magnetic circuit system 2 converts the electric energy into mechanical energy, thereby vibrating the first voice coil 321 and the second voice coil 322, and drives the diaphragm 31 to vibrate and sound, further converting mechanical energy into sound energy.

It can be understood that, after receiving the externally varying alternating current signal, the first voice coil 321 disposed in the magnetic gap 21 makes a reciprocating motion of cutting magnetic lines of force under the driving of the magnetic field force of the magnetic circuit system 2, so as to drive the diaphragm 31 of the vibration system 3 to vibrate and generate sound. After the second voice coil 322 receives the alternating current signal transmitted by the first voice coil 321, the magnetic circuit system 2 is fully utilized to perform reciprocating motion of cutting magnetic lines of force under the driving of the magnetic field force at the position of the avoiding hole 221, so that the magnetic field of the magnetic circuit system 2 is fully utilized, the first voice coil 321 and the second voice coil 322 are matched to improve the driving force to the diaphragm 31, and the BL value of the sound generating device 100 is effectively improved.

In the present embodiment, the conductive layer 311 can implement conductivity, so that the first voice coil 321 and the second voice coil 322 implement a series connection circuit through the conductive layer 311. It is understood that the conductive layer 311 may be disposed on the diaphragm 31 by an adhesive method, or may be disposed on the diaphragm 31 by a spraying method. Alternatively, the conductive layer 311 is coated on a side of the diaphragm 31 facing the magnetic circuit system 2, and is cured by, for example, a coating method to form a coating structure, which is not limited herein.

It is understood that the conductive layer 311 is made of a conductive material. Of course, the conductive layer 311 may be formed by doping or mixing or disposing a conductive material in the substrate, and is not limited herein. In this embodiment, the lead of the first voice coil 321 and the lead of the second voice coil 322 may be connected to the conductive layer 311 through conductive paste, and in order to improve the connection effect and achieve insulation from the outside, an insulating external fixing paste is further coated to improve the connection stability and prevent the lead of the first voice coil 321 and the lead of the second voice coil 322 from affecting the vibration effect and the sound generation effect of the diaphragm 31 during the vibration process of the diaphragm 31.

The sound generating apparatus 100 of the present invention improves the mounting stability of the magnetic circuit system 2 and the vibration system 3 by disposing the magnetic circuit system 2 and the vibration system 3 on the casing 1, by providing the magnetic circuit system 2 with the clearance hole 221 communicating with the magnetic gap 21, and providing the voice coil assembly 32 of the vibration system 3 with the first voice coil 321 and the second voice coil 322, so that one end of the first voice coil 321 is connected to the diaphragm 31, and the other end is suspended in the magnetic gap 21, and the second voice coil 322 is connected to one end of the first voice coil 321 far away from the diaphragm 31, at least part of the second voice coil 322 is located in the clearance hole 221, thus, on the basis of the first voice coil 321, the second voice coil 322 further utilizes the magnetic field of the magnetic circuit system 2 at the position avoiding hole 221, therefore, the first voice coil 321 and the second voice coil 322 make full use of the magnetic field generated by the magnetic circuit system 2, and the utilization rate of the magnetic field is improved, so that the BL value of the sound generating device 100 can be improved; meanwhile, the conductive layer 311 is arranged on one side of the diaphragm 31 facing the magnetic circuit system 2, so that the second voice coil 322 is connected with the first voice coil 321 through the conductive layer 311 to form a series circuit, and thus the first voice coil 321 and the second voice coil 322 can be ensured to be conducted and electrified, and the risk of wire breakage caused by suspension arrangement of a lead of the voice coil is effectively avoided.

Alternatively, the first voice coil 321 and the second voice coil 322 are integrally formed, for example, the bobbin of the first voice coil 321 and the bobbin of the second voice coil 322 are integrally formed, and coils are respectively wound on the bobbin of the first voice coil 321 and the bobbin of the second voice coil 322 to form the first voice coil 321 and the second voice coil 322. Of course, in other embodiments, the first voice coil 321 and the second voice coil 322 may be separated from each other, for example, the first voice coil 321 and the second voice coil 322 are connected to each other by an adhesive, which is not limited herein.

In an embodiment, the first voice coil 321 may be a square or racetrack-type ring structure, and the first voice coil 321 has two long axis sides 3211 and two short axis sides 3212 connected end to end, that is, the two short axis sides 3212 of the first voice coil 321 are opposite and spaced apart, and the two long axis sides 3211 are opposite and spaced apart, so that the long axis sides 3211 and the short axis sides 3212 are connected end to form a ring structure.

In an embodiment, the second voice coils 322 include two second voice coils 322, the two second voice coils 322 are connected to the first voice coil 321 through the conductive layer 311 to form a series circuit, the magnetic circuit system 2 is provided with two avoiding holes 221 corresponding to the two long axis sides 3211, the two second voice coils 322 are respectively connected to the two long axis sides 3211 and are symmetrically disposed, and each second voice coil 322 is located in one avoiding hole 221.

In this embodiment, as shown in fig. 3, 4 and 6, after the plurality of second voice coils 322 are connected to the first voice coil 321, and after current is applied to the first voice coil 321 and the second voice coil 322, it is ensured that the first voice coil 321 and the second voice coil 322 realize balanced vibration to ensure the vibration sound effect of the diaphragm 31 by arranging the plurality of second voice coils 322 and arranging the plurality of second voice coils 322 as a symmetrical structure. It is understood that the two second voice coils 322 are respectively connected to the two long shaft sides 3211, and the current directions in the two second voice coils 322 are opposite.

Alternatively, the number of the second voice coils 322 is even, so that the even number of the second voice coils 322 can be symmetrically connected to the first voice coil 321. Meanwhile, the plurality of second voice coils 322 fully utilize the magnetic field of the magnetic circuit system 2 near the bottom of the magnetic gap 21, thereby improving the BL value of the sound generating device 100.

Of course, in other embodiments, the number of the second voice coils 322 may also be odd, for example, the number of the second voice coils 322 is one, three, or the like, and at this time, the balance can be achieved by arranging the counterweight combination on the first voice coil 321, so that the first voice coil 321 is connected to both sides of the second voice coil 322, thereby ensuring the vibration balance of the voice coil assembly 32, which is not limited herein.

In another embodiment, the magnetic circuit system 2 has two avoiding holes 221 corresponding to the two short shaft sides 3212, the two second voice coils 322 are respectively connected to the two short shaft sides 3212 and are symmetrically disposed, and each second voice coil 322 is located in one avoiding hole 221.

It can be understood that the two short shaft sides 3212 of the first voice coil 321 are respectively connected with the same number of second voice coils 322, so as to ensure that the first voice coil 321 and the second voice coil 322 realize balanced vibration, so as to ensure the vibration and sound effect of the diaphragm 31.

Alternatively, a plurality of second voice coils 322 are respectively connected to the two short shaft sides 3212 of the first voice coil 321, and the number of the second voice coils 322 connected to the two short shaft sides 3212 is the same. Of course, the two long axis sides 3211 of the first voice coil 321 are respectively connected to a plurality of second voice coils 322, and the number of the second voice coils 322 connected to the two long axis sides 3211 is the same, which is not limited herein.

In one embodiment, the second voice coil 322 includes a plurality of second voice coils 322, and the plurality of second voice coils 322 includes two first sub voice coils and two second sub voice coils. The two first sub-voice coils, the two second sub-voice coils and the first voice coil 321 form a series circuit through the conductive layer 311.

In this embodiment, as shown in fig. 7, the magnetic circuit system 2 is provided with four avoiding holes 221 disposed at intervals corresponding to two major axis sides 3211 and two minor axis sides 3212 of the first voice coil 321, the two first sub voice coils are respectively connected to the two major axis sides 3211 and symmetrically disposed, the two second sub voice coils are respectively connected to the two minor axis sides 3212 and symmetrically disposed, each first sub voice coil is disposed in one avoiding hole 221, and each second sub voice coil is disposed in one avoiding hole 221.

It is understood that the number of the first sub-voice coils connected to the two long axis sides 3211 is the same, and the number of the second sub-voice coils connected to the two short axis sides 3212 is the same. Of course, in other embodiments, a plurality of first sub-voice coils may be connected to one long-axis side 3211, and a plurality of second sub-voice coils may be connected to one short-axis side 3212, as long as it is ensured that the voice coil assembly 32 can realize stable vibration, and the specific number is not limited.

In one embodiment, the conductive layer 311 includes an input conductive layer 3111, an output conductive layer 3112 and a common conductive layer 3116, wherein the input conductive layer 3111 is electrically connected to an input lead of the first voice coil 321, the output conductive layer 3112 is electrically connected to an output lead of the second voice coil 322, and the common conductive layer 3116 is electrically connected to an output lead of the first voice coil 321 and an input lead of the second voice coil 322.

In this embodiment, as shown in fig. 4, the conductive layer 311 is provided as an input conductive layer 3111, an output conductive layer 3112 and a common conductive layer 3116, so that the input conductive layer 3111 is electrically connected to the input lead of the first voice coil 321 to ensure that the input conductive layer 3111 can introduce an external circuit to the first voice coil 321, and the output conductive layer 3112 is electrically connected to the output lead of the second voice coil 322 to ensure that the output conductive layer 3112 introduces a current, which sequentially passes through the first voice coil 321 and the second voice coil 322, to the external circuit, thereby realizing the current inflow and outflow in the voice coil assembly 32. The current loop is realized by electrically connecting the output lead of the first voice coil 321 and the input lead of the second voice coil 322 to the common conductive layer 3116, thereby ensuring that the first voice coil 321 and the second voice coil 322 are connected in series circuit through the common conductive layer 3116, and ensuring that the current of the external circuit passes through the first voice coil 321 and the second voice coil 322 in sequence and then returns to the external circuit.

In one embodiment, the second voice coil 322 includes a plurality of, the conductive layer 311 includes a series conductive layer 3117, and the plurality of second voice coils 322 are connected in series through the series conductive layer 3117. It is to be understood that, in order to realize the series connection of the plurality of second voice coils 322, the series conductive layer 3117 may be disposed such that the plurality of second voice coils 322 are connected in series through the series conductive layer 3117.

In this embodiment, the second voice coil 322 and the first voice coil 321 form a series circuit, and the magnetic circuit system 2 is provided with the avoiding hole 221, so that the second voice coil 322 can be used to further improve the magnetic field utilization rate, improve the BL value of the sound generating apparatus 100, and optimize the smoothness of the BL.

It can be understood that the conductive layer 311 has excellent compliance and will not affect the compliance of the folded loop of the diaphragm 31. The first voice coil 321 is fixed to the conductive layer 311 through an adhesive process to achieve electrical communication.

In one embodiment, the diaphragm 31 includes a central portion 312, a ring-folded portion 313 surrounding the central portion 312, and a fixing portion 314 disposed outside the ring-folded portion 313, and the fixing portion 314 is connected to the housing 1.

In the present embodiment, as shown in fig. 1 to fig. 4, the central portion 312, the ring-folded portion 313 and the fixing portion 314 of the diaphragm 31 are integrally formed. The folded ring portion 313 is disposed around the central portion 312 and between the central portion 312 and the fixing portion 314, and the folded ring portion 313 may be a convex structure upward or downward. The diaphragm 31 is connected and fixed to the housing 1 of the sound generating apparatus 100 through the fixing portion 314, so as to improve the connection stability and the sealing property between the housing 1 and the diaphragm 31.

It is understood that, in order to increase the effective vibration area of the diaphragm 31, the fixing portion 314 may be formed by extending the outer side of the corrugated portion 313 downward or upward, so that the fixing portion 314 is connected and fixed with the inner side wall or the outer side wall of the housing 1.

In one embodiment, as shown in fig. 4, each of the input conductive layer 3111 and the output conductive layer 3112 includes a first conductive portion 3113, a connecting portion 3114 and a second conductive portion 3115 connected in sequence, the second conductive portion 3115 is disposed on the fixing portion 314, the connecting portion 3114 is disposed on the folded portion 313, and the first conductive portion 3113 is disposed on the central portion 312 and electrically connected to the input lead of the first voice coil 321 or the output lead of the second voice coil 322.

In this embodiment, the input conductive layer 3111 and the output conductive layer 3112 of the conductive layer 311 extend from the central portion 312 of the diaphragm 31 to the fixing portion 314, so that the conductive layer 311 connects and conducts the voice coil assembly 32 to an external circuit.

It is to be understood that the first conductive part 3113 of the input conductive layer 3111 and the output conductive layer 3112 is provided in the central part 312 and electrically connected to the input lead of the first voice coil 321 or the output lead of the second voice coil 322, and the second conductive part 3115 of the input conductive layer 3111 and the output conductive layer 3112 is provided in the fixing part 314 for connecting to an external circuit. The first conductive portion 3113 and the second conductive portion 3115 are electrically connected to each other through a connection portion 3114 provided in the folded-over portion 313.

Alternatively, the diaphragm 31 is disposed in a square shape, and the conductive layer 311 may be disposed at a corner portion of the diaphragm 31, although the conductive layer 311 may also be disposed on a long axis side or a short axis side of the diaphragm 31, and the like, which is not limited herein.

In this embodiment, as shown in fig. 4, the common conductive layer 3116 is provided in the central portion 312. The series conductive layer 3117 is provided in the center portion 312 and located inside the voice coil.

Optionally, the central portion 312 is provided with a hollowed hole 3121, and the vibration system 3 further includes a dome 34, wherein the dome 34 is connected to the central portion 312 and covers the hollowed hole 3121.

In the present embodiment, by providing the hollowed-out hole 3121 in the central portion 312 of the diaphragm 31, the overall weight of the diaphragm 31 can be effectively reduced. Optionally, a hollow hole 3121 is disposed in the center of the central portion 312, and the hollow hole 3121 may be a through hole or a hollow hole or an opening. Optionally, the number of the hollowed-out holes 3121 may be one or more, which is not limited herein.

For the structural strength of reinforcing vibrating diaphragm 31, avoid vibrating diaphragm 31 can take place the shrink deflection aggravation at the vibration in-process, set up dome 34 through central part 312 at vibrating diaphragm 31, dome 34 connects in central part 312, and cover fretwork hole 3121, on the one hand, reinforce vibrating diaphragm 31's structural strength, on the other hand also can avoid outside impurity or dust to pass through the inside that fretwork hole 3121 got into sound generating mechanism 100, avoid vibrating diaphragm 31 can take place the shrink deflection aggravation at the vibration in-process simultaneously, thereby it is higher to reduce sound generating mechanism 100's THD distortion, promote audio effects.

In one embodiment, the housing 1 is provided with a conductive insert, which is electrically connected to an end of the conductive layer 311 away from the first voice coil 321, and is used for connecting with an external circuit.

In the present embodiment, by providing a conductive insert in the housing 1, the external circuit is conductively connected to the second conductive part 3115 of the conductive layer 311 through the conductive insert, so that the voice coil assembly 32 is electrically connected to the external circuit. Alternatively, the conductive insert is injection molded integrally with the housing 1.

It is to be understood that the conductive insert is provided with an inner pad and an outer pad, the outer pad is used for soldering connection with an external circuit, and the inner pad is soldered or bonded to the second conductive portion 3115, which is not limited herein.

In one embodiment, the magnetic circuit system 2 includes a magnetic yoke 22, a central magnetic circuit portion 23, and a side magnetic circuit portion 24, wherein the central magnetic circuit portion 23 is disposed on a side of the magnetic yoke 22 facing the diaphragm 31, the side magnetic circuit portion 24 is disposed on a side of the magnetic yoke 22 facing the diaphragm 31 and located outside the central magnetic circuit portion 23, and the side magnetic circuit portion 24 is spaced from the central magnetic circuit portion 23 to form a magnetic gap 21; the yoke 22 has a clearance hole 221 corresponding to the magnetic gap 21.

In this embodiment, the magnetic yoke 22 may be selected from a magnetic plate or a magnetic basin stand, and is not limited herein. The yoke 22 is used to support and mount the fixed central magnetic path portion 23 and the side magnetic path portions 24. The magnetic circuit system 2 is fixedly connected with the shell 1 through the side magnetic circuit part 24. Alternatively, the magnetic conductive yoke 22 is adhesively connected to the central magnetic path portion 23 and the side magnetic path portion 24, and the side magnetic path portion 24 is adhesively connected to the case 1.

In the present embodiment, the central magnetic circuit portion 23 includes a central magnet and a central washer stacked on each other, the central magnet is disposed between the central washer and the magnetic conductive yoke 22, and the side magnetic circuit portion 24 includes a side magnet and a side washer, the side magnet is disposed between the side washer and the magnetic conductive yoke 22. It will be appreciated that the edge bead of the edge magnetic circuit portion 24 may be adhesively attached to the housing 1. Optionally, the washer and the housing 1 are of an integrally formed structure.

It will be appreciated that the central washer and the side washers may alternatively be of magnetically permeable plate construction. The central magnet and the central washer have the same structural profile, and the central magnet and the central washer can be of a plate structure or a ring structure, which is not limited herein. The edge magnet and the edge washer have the same structural outline, and the edge magnet and the edge washer can be of a plate-shaped structure or an annular structure, which is not limited herein.

In the embodiment, the magnetic yoke 22 is provided with the avoiding hole 221 corresponding to the magnetic gap 21, so that the second voice coil 322 is disposed in the avoiding hole 221, and thus the second voice coil 322 can fully utilize the magnetic field generated by the central magnet and the edge magnet on the magnetic yoke 22, thereby improving the utilization rate of the magnetic field. It will be appreciated that the peripheral magnetic path portion 24 may be an annular structure, with the annular peripheral magnetic path portion 24 surrounding the central magnetic path portion 23 and spaced from the central magnetic path portion 23 to form the annular magnetic gap 21. Alternatively, the side magnetic path portion 24 may have a circular shape, or a polygonal shape such as a quadrangle, a pentagon, a hexagon, and the like.

Of course, the side magnetic path portion 24 includes a plurality of side magnetic path portions 24, and the plurality of side magnetic path portions 24 are spaced and arranged around the central magnetic path portion 23.

In one embodiment, as shown in fig. 3, the side magnetic path portions 24 include a plurality of side magnetic path portions 24, the plurality of side magnetic path portions 24 are disposed around the central magnetic path portion 23 and spaced apart from the central magnetic path portion 23 to form the magnetic gap 21, and two adjacent side magnetic path portions 24 are spaced apart to form a gap 241 communicating with the magnetic gap 21.

In this embodiment, the vibration system 3 further includes a damper 33, one end of the damper 33 is connected to the housing 1, and the other end of the damper 33 passes through the notch 241 and is connected to a side of the first voice coil 321 opposite to the diaphragm 31. It can be understood that, through setting up centering branch piece 33 for the one end of centering branch piece 33 is connected with shell 1, and the other end of centering branch piece 33 is connected with voice coil assembly 32, thereby utilizes centering branch piece 33 balance and stabilizes the vibration that voice coil assembly 32 drove vibrating diaphragm 31 and produce, avoids voice coil assembly 32 to drive vibrating diaphragm 31 and takes place the swing or polarization phenomenon.

Optionally, the centering branch 33 includes four, and four centering branches 33 are disposed corresponding to the four notches 241 of the magnetic circuit system 2. In the present embodiment, the damper 33 includes an outer fixing portion, an inner fixing portion, and an elastic portion connected between the outer fixing portion and the inner fixing portion, the outer fixing portion is connected to the housing 1, and the inner fixing portion is connected to a side of the first voice coil 321 opposite to the diaphragm 31.

In the present embodiment, the centering branch 33 can be made of PI material, which is not limited herein. Of course, in other embodiments, the centering branch piece 33 may be made of FPCB, or a conductive circuit is disposed in the centering branch piece 33, so that one end of the centering branch piece 33 may be electrically connected to the lead of the voice coil assembly 32, and the other end of the centering branch piece 33 is fixed on the housing 1 for being connected to and conducted with an external circuit, so that the external circuit is connected to and conducted with the voice coil assembly 32 by using the centering branch piece 33, thereby effectively avoiding the risk of wire breakage of the lead of the voice coil assembly 32 during the vibration process.

In one embodiment, the central magnetic path portion 23 and the side magnetic path portion 24 are both magnetized in the vertical direction, and the magnetizing directions of the central magnetic path portion 23 and the side magnetic path portion 24 are opposite.

In the present embodiment, the center magnet of the center magnetic path portion 23 and the side magnets of the side magnetic path portion 24 are magnetized in the vertical direction, and the magnetization directions of the center magnet and the side magnets are opposite. It can be appreciated that such an arrangement can achieve an optimized BL nonlinear performance.

The invention further provides an electronic device, which comprises a device shell and the sound generating device 100, wherein the sound generating device 100 is arranged in the device shell. The specific structure of the sound generating device 100 refers to the foregoing embodiments, and since the electronic device adopts all technical solutions of all the foregoing embodiments, at least all beneficial effects brought by the technical solutions of the foregoing embodiments are achieved, and details are not repeated here.

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

Claims

1. A sound generating device, comprising:

a housing;

2. The apparatus according to claim 1, wherein said second voice coil comprises two, two of said second voice coils are connected to said first voice coil through said conductive layer to form said series circuit, said first voice coil has two major axis sides and two minor axis sides connected end to end;

3. The apparatus according to claim 1, wherein said second voice coil comprises two first sub-voice coils and two second sub-voice coils, and said two first sub-voice coils, said two second sub-voice coils and said first voice coil form said series circuit through said conductive layer;

4. The sound generating apparatus of claim 1, wherein the conductive layer comprises:

5. The sound generating apparatus according to claim 4, wherein said second voice coil includes a plurality, said conductive layer includes a series conductive layer, and a plurality of said second voice coils are connected in series through said series conductive layer.

6. The sound production device according to claim 5, wherein the diaphragm comprises a central portion, a folded ring portion surrounding the central portion, and a fixing portion disposed outside the folded ring portion, and the fixing portion is connected to the housing;

7. The sound generating apparatus according to claim 6, wherein said common conductive layer is provided in said central portion;

8. The sound generating apparatus according to any one of claims 1 to 7, wherein the housing is provided with a conductive insert, the conductive insert is electrically connected to an end of the conductive layer away from the first voice coil, and the conductive insert is used for connecting with an external circuit;

9. The sound generating apparatus according to any one of claims 1 to 7, wherein the magnetic circuit system comprises:

a magnetic yoke;

10. The sound generating apparatus as claimed in claim 9, wherein the side magnetic path portions include a plurality of side magnetic path portions, the plurality of side magnetic path portions being disposed around the central magnetic path portion and spaced from the central magnetic path portion to form the magnetic gap, two adjacent side magnetic path portions being spaced to form a gap communicating with the magnetic gap;

11. The sound generating apparatus as claimed in claim 9, wherein the central magnetic circuit portion and the side magnetic circuit portions are both magnetized in a vertical direction, and the central magnetic circuit portion and the side magnetic circuit portions are magnetized in opposite directions.

12. An electronic device comprising a device housing and a sound generating device according to any one of claims 1 to 11, the sound generating device being provided in the device housing.