CN117880706A

CN117880706A - Sounding monomer and sounding module

Info

Publication number: CN117880706A
Application number: CN202311873145.8A
Authority: CN
Inventors: 蔡晓东; 刘松; 李波波
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2023-12-29
Filing date: 2023-12-29
Publication date: 2024-04-12

Abstract

The invention discloses a sounding monomer and a sounding module, wherein the sounding monomer comprises a magnetic circuit system and a vibration system, two first magnetic circuit parts of the magnetic circuit system are arranged at intervals and are connected with a magnetic conduction yoke, an accommodating space is formed between the two first magnetic circuit parts, a vibrating diaphragm of the vibration system is arranged in the accommodating space, a folded ring part of the vibrating diaphragm protrudes towards one side far away from the magnetic conduction yoke, a centering support piece comprises a spring arm part corresponding to the folded ring part of the vibrating diaphragm, the arrangement direction of the spring arm part is perpendicular to the arrangement direction of the two first magnetic circuit parts, and each first voice coil is arranged corresponding to one magnetic circuit assembly and is connected with the vibrating diaphragm through a framework; wherein, along the vibration direction of vibrating diaphragm, the top surface of vibrating diaphragm is less than the top surface of two first magnetic circuit parts. The sounding monomer provided by the invention realizes thinning, has higher mass productivity, is applied to modules or products, does not need an additional reserved vibration space of the whole machine, and is favorable for further thinning of the whole machine end.

Description

Sounding monomer and sounding module

Technical Field

The invention relates to the technical field of electroacoustic transduction, in particular to a sounding monomer and a sounding module using the sounding monomer.

Background

Sound producing monomers are important electroacoustic transduction components in consumer electronics, which find wide application as speakers, headphones, earphones, and the like. As the performance of electronic products improves, improvements in acoustic performance with respect to sound emitting monomers are also a necessary trend. In order to meet better acoustic performance, the sounding monomer often needs to be provided with a magnetic circuit system with larger size and stronger magnetic field strength.

However, as portable intelligent devices are lighter and thinner, particularly folding products, the requirements of the terminal devices for ultra-thin sounding units are higher and higher. Usually, the sounding monomer needs to reserve the product vibration space and the sounding pipeline, so that when the ultra-thin module design is realized, the thickness of the miniature sounding monomer in the module needs to be further reduced.

In the related art, when the thickness of the product is reduced, in order to maintain the performance of the product under EQ, a larger vibration space is required to be reserved in the product, so that the magnet, the magnetic conduction plate and the magnetic yoke of the sounding monomer can only be thinned. However, too thin magnets have a high chipping rate during transportation, cleaning and magnetizing, resulting in a sharp rise in material costs. Meanwhile, as the magnet, the magnetic conduction plate and the magnetic yoke are thinned to different degrees, the drop reliability yield of finished products is also greatly reduced, and mass production cannot be completed.

Disclosure of Invention

The invention mainly aims to provide a sounding monomer and a sounding module, and aims to provide a thinned sounding monomer, wherein the sounding monomer not only maximally utilizes the thickness space of a product to realize thinning, but also effectively increases the thickness of a first magnet, has higher mass productivity, is applied to the module or the product, does not need an additional reserved vibration space of a whole machine, and is beneficial to further lightening and thinning of the whole machine end.

In order to achieve the above object, the present invention provides a sounding monomer including:

the magnetic circuit system comprises a magnetic conduction yoke and two first magnetic circuit parts, wherein the two first magnetic circuit parts are arranged at intervals and are connected with the magnetic conduction yoke, an accommodating space is formed between the two first magnetic circuit parts, and each first magnetic circuit part comprises a magnetic circuit assembly; and

the vibrating system comprises a vibrating diaphragm, a framework, a centering support piece and two first voice coils, wherein the vibrating diaphragm is arranged in the accommodating space, the vibrating diaphragm comprises a central part, a folded ring part which surrounds the central part and a fixing part which is arranged on the outer side of the folded ring part, the folded ring part protrudes towards one side far away from the magnetic yoke, the centering support piece comprises an elastic arm part which corresponds to the folded ring part of the vibrating diaphragm, the arrangement direction of the elastic arm part is perpendicular to the arrangement direction of the two first magnetic circuit parts, and each first voice coil is arranged corresponding to one magnetic circuit assembly and is connected with the vibrating diaphragm through the framework;

wherein, along the vibration direction of vibrating diaphragm, the top surface of vibrating diaphragm is lower than the top surface of two first magnetic circuit parts.

In an embodiment, the centering support piece comprises an outer fixing portion, an inner fixing portion located at the inner side of the outer fixing portion, and a spring arm portion connected with the outer fixing portion and the inner fixing portion, wherein the outer fixing portion is in an annular arrangement, the outer fixing portion surrounds the two magnetic circuit assemblies, and is partially clamped between the fixing portion and the magnetic conductive yoke, the inner fixing portion is clamped between the central portion and the framework, and the spring arm portion extends along the arrangement direction of the two first magnetic circuit portions.

In an embodiment, the inner fixing portion is in a square ring shape, the inner fixing portion is provided with four corners, each corner is provided with a bonding pad, the frames comprise four frames, each first voice coil is located between two frames, one end of each frame is connected with the bonding pad, the other end of each frame is connected with the first voice coil and is electrically connected with a lead wire of the first voice coil, so that the two first voice coils are connected in series through the centering support piece and the frames;

and/or the outer fixing part, the elastic arm part and the inner fixing part are of an integrated structure;

and/or the outer fixing part, the elastic arm part and the inner fixing part are positioned on the same plane;

And/or the framework comprises a first supporting part, a first connecting part and a second supporting part which are connected, wherein the first supporting part is connected with the inner fixing part, and the second supporting part is connected with the first voice coil and a lead wire of the first voice coil;

and/or the vibrating diaphragm further comprises a bending part which is formed by bending the fixing part towards the magnetic conduction yoke, and the bending part is connected with the magnetic conduction yoke;

and/or the central part is provided with a hollowed-out hole, the vibration system further comprises a ball top cover, and the ball top cover is arranged at the hollowed-out hole.

In an embodiment, the magnetic yoke includes a bottom wall and a side wall disposed at an included angle, and the side wall and the bottom wall enclose to form a cavity;

the magnetic conduction yoke further comprises two side plates positioned in the accommodating cavity, the two side plates are arranged on the bottom wall at intervals, the accommodating space is positioned between the two side plates, one side, facing away from the accommodating space, of each side plate is enclosed with the side wall to form an accommodating space, each magnetic circuit assembly is arranged in one accommodating space and is spaced from the side wall and the side plate to form a first magnetic gap, and one end of the first voice coil is suspended in the first magnetic gap;

Wherein, each the both ends of curb plate still are formed with the intercommunication the gap of dodging of accommodation space and accommodation space, the skeleton is kept away from the one end of vibrating diaphragm passes dodge the gap, and with first voice coil loudspeaker voice coil is connected.

In one embodiment, the bottom wall and the side wall are integrally formed;

and/or the side wall is arranged around the periphery of the bottom wall;

and/or the side wall and the bottom wall are arranged vertically;

and/or the side plate and the bottom wall are of an integrated structure;

and/or the side plates are arranged vertically to the bottom wall;

and/or the magnetic conduction yoke is also provided with a plurality of leakage holes communicated with the accommodating cavity, wherein the leakage holes comprise a plurality of leakage holes, and the plurality of leakage holes are arranged on the side wall at intervals;

and/or the magnetic conduction yoke is provided with two long axis sides and two short axis sides which are connected end to end, and the two first magnetic circuit parts are arranged at intervals along the extending direction of the long axis sides.

In an embodiment, the bottom wall is provided with a through hole adjacent to each side plate, each side plate is formed by bending one side of the bottom wall adjacent to the through hole towards the inside of the containing cavity, and the sounding monomer further comprises a cover plate, and the cover plate covers the through hole.

In an embodiment, the sounding unit comprises a shell, wherein the shell is used for accommodating and fixing the vibration system and the magnetic circuit system, the shell comprises a bottom plate and a side wall plate, and the side wall plate and the bottom plate are enclosed to form an installation space;

the magnetic conduction yoke is fixed on the surface of the bottom plate; or the bottom plate is provided with a through hole, and the magnetic yoke is embedded in the through hole; or, the magnetic yoke and the bottom plate are integrally formed.

In an embodiment, the magnetic circuit system further includes a central magnetic circuit, the central magnetic circuit is disposed in the accommodating space, and is opposite to and spaced from the vibrating diaphragm in the vibrating direction of the vibrating diaphragm, and the top surface of the central magnetic circuit is lower than the top surfaces of the two first magnetic circuit portions;

the vibration system further comprises a central voice coil, the central voice coil is arranged corresponding to the central magnetic circuit, and one end of the central voice coil is connected with the vibrating diaphragm.

In one embodiment, the central magnetic circuit is arranged on the magnetic guide yoke, the central magnetic circuit comprises a central magnet and a central magnetic guide plate which are arranged in a stacked manner, and the central magnet is clamped between the magnetic guide yoke and the central magnetic guide plate; the magnetic yoke and/or the central magnetic conduction plate are/is provided with an opening, the central magnet is provided with a protruding part corresponding to the opening, and the protruding part is limited in the opening;

And/or, the magnetic yoke further comprises a plurality of vertical plates, the vertical plates are arranged in the accommodating space at intervals, the central magnetic circuit is positioned among the vertical plates and is spaced with the vertical plates to form a central magnetic gap in a surrounding manner, and one end of the central voice coil is suspended in the central magnetic gap;

and/or the central part of the vibrating diaphragm is provided with a bulge corresponding to the central voice coil, and the bulge is connected with the central voice coil;

and/or the thickness of the central magnetic circuit is smaller than or equal to 1/2 of the thickness of the magnetic circuit system along the vibration direction of the vibrating diaphragm.

In one embodiment, each of the magnetic circuit assemblies includes:

at least two first magnets, the first magnets are laminated and arranged on the magnetic yoke; and

at least one first magnetic conduction plate, wherein the first magnetic conduction plate is clamped between two adjacent first magnets;

the first magnets magnetize along the vibrating direction of the vibrating diaphragm, and the magnetizing directions of two adjacent first magnets positioned on two sides of the first magnetic conduction plate are opposite.

In an embodiment, each of the first magnetic circuit portions further includes a cover, each of the covers one of the magnetic circuit assemblies and is connected to the magnetic conductive yoke, and a peripheral edge of the cover extends toward one side of the diaphragm to form an extension portion, and the extension portion is connected to the diaphragm.

In an embodiment, an acoustic path is formed between the top surface of the edge of the diaphragm extending in the arrangement direction of the two first magnetic circuit portions and the two first magnetic circuit portions.

The invention also provides a sounding module, which comprises a module shell and the sounding monomer, wherein the sounding monomer is arranged on the module shell.

According to the sounding monomer, the magnetic circuit system is arranged to be the magnetic guide yoke and the two first magnetic circuit parts, so that the two first magnetic circuit parts are arranged at intervals and are connected with the magnetic guide yoke, an accommodating space is formed between the two first magnetic circuit parts, each first magnetic circuit part comprises a magnetic circuit component, and therefore the accommodating space is utilized to provide mounting and vibrating space for the vibrating diaphragm of the vibrating system, projections of the vibrating diaphragm and the two first magnetic circuit parts on the magnetic guide yoke are not overlapped, the vibrating diaphragm has sufficient vibrating space, the thickness of the magnetic circuit component of the first magnetic circuit part in the vibrating direction of the vibrating diaphragm is not influenced, the thickness of the magnetic circuit component of the first magnetic circuit part in the vibrating direction of the vibrating diaphragm is increased, and compared with the arrangement of the vibrating diaphragm and the magnetic circuit part in the traditional sounding monomer in the up-down direction, the thickness of the sounding monomer in the vibrating direction of the vibrating diaphragm is effectively thinned; meanwhile, the two first voice coils are correspondingly arranged with the magnetic circuit assemblies of the two first magnetic circuit parts respectively, and the two first voice coils are connected with the vibrating diaphragm through the framework, so that larger magnetic circuits can be provided for the two first voice coils respectively through the magnetic circuit assemblies of the two first magnetic circuit parts, BL values are improved, and the heat dissipation area can be effectively increased by utilizing the magnetic circuit assemblies of the two first magnetic circuit parts, and heat dissipation is facilitated when the sounding monomer works; further, through setting up the vibrating diaphragm to the central part, encircle the ring portion that turns over of central part setting and locate the fixed part in the ring portion outside, and along the vibration direction of vibrating diaphragm, the top surface of vibrating diaphragm is less than the top surface of two first magnetic circuit parts, so the monolithic slim design of realization sound production, and be applied to in module or the product with the sound production monomer, need not extra reserved vibration space of complete machine, be favorable to the complete machine end further frivolously, and turn over the ring portion towards keeping away from the protruding of one side that the magnetic yoke is located, and set up the centering piece, make the bullet arm of centering piece correspond with the ring portion of vibrating diaphragm, and make the direction of arranging of bullet arm perpendicular with the direction of arranging of two first magnetic circuit parts, thereby utilize centering piece to play the centering effect to the vibration of first voice coil, avoid first voice coil to take place swing or polarization in vibration process, in order to improve single sound production effect and the acoustics performance of sound production.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a sounding monomer according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a sound-producing monomer according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a sound emitting unit according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a sound-producing monomer according to another embodiment of the present invention;

FIG. 5 is an exploded view of a sound emitting unit according to another embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a sound emitting unit according to another embodiment of the present invention;

FIG. 7 is a schematic diagram of another embodiment of the present invention with the sound generating monomers removed from the diaphragm and the two covers;

FIG. 8 is a schematic diagram of a magnetic yoke according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a magnetic yoke according to another embodiment of the present invention;

FIG. 10 is a schematic diagram of a diaphragm according to an embodiment of the present invention;

FIG. 11 is a schematic structural view of a centering support according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of a sound module according to an embodiment of the present invention;

FIG. 13 is a schematic cross-sectional view of a sound module according to an embodiment of the invention;

FIG. 14 is a schematic diagram of a sound module according to another embodiment of the present invention;

FIG. 15 is a schematic cross-sectional view of a sound module according to another embodiment of the present invention;

FIG. 16 is a schematic cross-sectional view of another view of a sound module according to another embodiment of the present invention.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name	Reference numerals	Name of the name
						100	Sounding monomer	1232	Coaming plate	218	Sound producing channel
1	Magnetic circuit system	1233	Concave cavity	22	Skeleton frame
						11	Magnetic conductive yoke	1234	Extension part	221	A first support part
111	Bottom wall	13	First magnetic gap	222	First connecting part
						1111	Limiting groove	14	Central magnetic circuit	223	A second supporting part
1112	Through hole	141	Center magnet	224	Avoidance zone
						1113	Long axis side	1411	A first surface	23	First voice coil
1114	Short axis edge	1412	Projection part	24	Center voice coil
						112	Side wall	142	Central magnetic conductive plate	25	Centering support piece
113	Containing cavity	15	Perforating the hole	251	External fixing part
						114	Side plate	16	Center magnetic gap	252	Spring arm
1141	Accommodating space	2	Vibration system	253	Internal fixing part
						1142	Leakage hole	21	Vibrating diaphragm	256	Corner portion
1143	Avoidance gap	211	Central portion	300	Module shell
						115	Cover plate	2111	Hollow hole	310	Mounting cavity
116	Vertical plate	212	Folded ring part	311	Sounding hole
						117	Accommodation space	213	Fixing part	320	Anterior acoustic chamber
12	A first magnetic circuit part	214	Bending part	330	Rear acoustic cavity
						121	Magnetic circuit assembly	215	Ball top	340	Front face
1211	First magnet	2151	Protrusions	350	Side surface
						1212	First magnetic conductive plate	2152	Edge portion	360	Fixing hole
123	Cover body	216	First side edge	370	Mounting hole
						1231	Top plate	217	Second side edge	400	Sounding module

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Meanwhile, the meaning of "and/or" and/or "appearing throughout the text is to include three schemes, taking" a and/or B "as an example, including a scheme, or B scheme, or a scheme that a and B satisfy simultaneously.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

However, as portable intelligent devices are lighter and thinner, particularly folding products, the requirements of the terminal devices for ultra-thin sounding units are higher and higher. In the related art, the magnetic circuit system in the sounding monomer is generally opposite or opposite to the vibrating diaphragm, that is, the vibrating diaphragm and the magnetic circuit system are arranged up and down in the vibrating direction of the vibrating diaphragm, and when the sounding monomer is applied to the module, the module needs to reserve the upper vibrating space and the sounding pipeline of the vibrating system. Therefore, when the ultra-thin module design is implemented, the thickness of the micro sound generating unit in the module needs to be further reduced.

When the thickness of the product is reduced, in order to maintain the performance of the product EQ, a larger vibration space is reserved in the module, so that the magnet, the magnetic conduction plate and the magnetic yoke of the sounding monomer can only be thinned. However, too thin magnets have a high chipping rate during transportation, cleaning and magnetizing, resulting in a sharp rise in material costs. Meanwhile, as the magnet, the magnetic conduction plate and the magnetic yoke are thinned to different degrees, the drop reliability yield of finished products is also greatly reduced, and mass production cannot be completed.

Based on the above-described ideas and problems, the present invention proposes a sounding cell 100. In this embodiment, the sounding unit 100 is configured by disposing two first magnetic circuit portions 12 at two ends of the sounding unit 100, so that an accommodating space 117 is formed between the two first magnetic circuit portions 12, thereby providing an installation and vibration space for the diaphragm 21 of the vibration system 2 by using the accommodating space 117, and each first voice coil 23 is disposed corresponding to the magnetic circuit assembly 121 of each first magnetic circuit portion 12 and is connected with the diaphragm 21 by the frame 22, so that the magnetic circuit system 1 and the diaphragm 21 are horizontally arranged in the vibration direction of the diaphragm 21, i.e. in the thickness direction of the sounding unit 100, instead of being disposed up and down, reducing the thickness dimension of the sounding unit 100, and simultaneously realizing maximum utilization of the product thickness space.

Meanwhile, since the vibrating diaphragm 21 is arranged in the accommodating space when vibrating, the sounding module 400 does not need to reserve additional vibrating space, which is beneficial to further thinning the sounding module 400 and the whole machine end; and the two first magnetic circuit portions 12 are located at two sides of the diaphragm 21 and are not opposite or opposite to the diaphragm 21, so that the thickness of the first magnets 1211 of the two first magnetic circuit portions 12 is increased more than that of the conventional structure, the mass productivity is higher, and the heat dissipation area can be effectively increased by utilizing the two first magnetic circuit portions 12, which is beneficial to heat dissipation of the sounding monomer 100 during working.

It is to be understood that the sounding unit 100 is applied to the sounding module 400 or an electronic device, and the sounding module 400 or the electronic device may be a smart watch, a mobile phone, a sound device, a computer, an earphone, a television, or the like, which is not limited herein.

Referring to fig. 1 to 11 in combination, in the embodiment of the invention, the sounding unit 100 includes a magnetic circuit system 1 and a vibration system 2, the magnetic circuit system 1 includes a magnetic yoke 11 and two first magnetic circuit portions 12, the two first magnetic circuit portions 12 are disposed at intervals and connected with the magnetic yoke 11, an accommodating space 117 is formed between the two first magnetic circuit portions 12, each first magnetic circuit portion 12 includes a magnetic circuit assembly 121, the vibration system 2 includes a diaphragm 21, a frame 22, a centering support 25 and two first voice coils 23, the diaphragm 21 is disposed in the accommodating space 117, the diaphragm 21 includes a central portion 211, a ring portion 212 disposed around the central portion 211, and a fixing portion 213 disposed outside the ring portion 212, the ring portion 212 protrudes 2151 toward a side far from the magnetic yoke 11, the centering support 25 includes a spring arm 252 corresponding to the ring portion 212 of the diaphragm 21, an arrangement direction of the spring arm 252 is perpendicular to an arrangement direction of the voice coils of the two first magnetic circuit portions 12, each first voice coil 23 is disposed corresponding to the one magnetic circuit assembly 121, and is connected with the diaphragm 21 through the frame 22; wherein the top surface of the diaphragm 21 is lower than the top surfaces of the two first magnetic circuit portions 12 in the vibration direction of the diaphragm 21.

In the present embodiment, the sound generating unit 100 is a micro speaker. Alternatively, the sound emitting unit 100 is provided in a square shape.

As can be appreciated, the magnetic circuit assembly 121 has a first magnetic gap, and the magnetic circuit assembly 121 includes an inner magnetic portion and an outer magnetic portion that are spaced apart and form a first magnetic gap therebetween; or a first magnetic gap is formed between the magnetic circuit assembly 121 and the magnetic conductive yoke 11, the magnetic conductive yoke 11 may have a bending part bending towards the magnetic circuit assembly 121, a first magnetic gap is formed between the bending part and the magnetic circuit assembly 121, and the first voice coil 23 is disposed in the first magnetic gap and connected with the diaphragm 21 through the skeleton 22 so as to drive the diaphragm 21 to vibrate and sound.

It will be appreciated that the direction in which the diaphragm 21 vibrates is defined as a first direction, the direction in which the two first magnetic circuit portions 12 are arranged is defined as a second direction, and the third direction and the first direction and the second direction are disposed perpendicular to each other. In this embodiment, the two first magnetic circuit portions 12 are arranged at intervals along the second direction, that is, the two first magnetic circuit portions 12 and the diaphragm 21 are arranged sequentially along the second direction, the two first voice coils 23 are arranged at intervals along the second direction, and each first voice coil 23 corresponds to the magnetic circuit assembly 121 of one first magnetic circuit portion 12. Alternatively, each of the first voice coils 23 is provided extending in the third direction.

It should be noted that, by arranging the two first magnetic circuit portions 12 on two sides of the diaphragm 21, that is, the two first magnetic circuit portions 12 and the diaphragm 21 are not arranged up and down in the vibration direction of the diaphragm 21, but are arranged left and right, that is, the two first magnetic circuit portions 12 and the diaphragm 21 are sequentially arranged in the direction perpendicular to the vibration direction of the diaphragm 21, so that the first magnetic circuit portions 12 are not opposite to the diaphragm 21, and thus, a sufficient vibration space is provided for the diaphragm 21 by using the accommodating space 117, and the first magnetic circuit portions 12 are not opposite to the diaphragm 21, so that the thickness of the first magnetic circuit portions 12 in the vibration direction of the diaphragm 21 is not reserved for the diaphragm 21, so that the thickness of the first magnetic circuit portions 12 in the vibration direction of the diaphragm 21 is effectively increased compared with that of the magnetic circuit system opposite to the diaphragm 21 in the conventional sounding monomer, and thus the magnetic field performance and strength are effectively improved, and the BL value and the acoustic performance of the sounding monomer 100 are improved.

Alternatively, opposite sides of the diaphragm 21 may be fixedly connected with the two first magnetic circuit portions 12 to achieve mounting fixation.

It can be understood that each first magnetic circuit portion 12 includes a magnetic circuit assembly 121, each first voice coil 23 is disposed corresponding to one magnetic circuit assembly 121 and is connected to the diaphragm 21 through the frame 22, that is, each first voice coil 23 of the two first voice coils 23 corresponds to each magnetic circuit assembly 121 of the two first magnetic circuit portions 12 and is connected to the diaphragm 21 through the frame 22, so that the two first voice coils 23 respectively drive the diaphragm 21 to vibrate and sound under the magnetic field effect of the two first magnetic circuit portions 12, thereby effectively improving the driving force, and further improving the BL value and the acoustic performance of the sound generating unit 100.

In the present embodiment, the magnet yoke 11 may be selected to be an integrally formed structure, so that the consistency of the mounting of the two first magnetic circuit portions 12 on the magnet yoke 11 is ensured, thereby ensuring the synchronism of the vibration of both sides of the diaphragm 21 with the two first voice coils 23. The magnetically conductive yoke 11 is square. Alternatively, the magnetic yoke 11 is rectangular in configuration, i.e., the magnetic yoke 11 has two major and two minor sides 1113, 1114 that are joined end to end. Alternatively, the two first magnetic circuit portions 12 are arranged at intervals along the extending direction of the long axis side 1113, and the diaphragm 21 is located between the two first magnetic circuit portions 12, at which time the two first magnetic circuit portions 12 and the diaphragm 21 are arranged in sequence along the extending direction of the long axis side 1113.

Of course, in other embodiments, the magnetic yoke 11 may be configured as a split structure, that is, the magnetic yoke 11 includes two lower yokes, which respectively correspond to the two first magnetic circuit portions 12, and the accommodating space 117 formed between the two first magnetic circuit portions 12 has a through cavity structure with two open ends, which is not limited herein.

In one embodiment, the top surface of the diaphragm 21 is lower than the top surfaces of the two first magnetic circuit portions 12 in the vibration direction of the diaphragm 21. I.e. the top surface of the diaphragm 21 is lower than the side surface of the first magnetic circuit portion 12 facing away from the magnetic yoke 11. It will be appreciated that such an arrangement is effective to reduce the thickness or height of the sound generating unit 100 in the direction of vibration of the diaphragm 21.

In this embodiment, the two first magnetic circuit portions 12 are located at two sides of the diaphragm 21 and do not overlap with the diaphragm 21 in the vibration direction of the diaphragm 21, at this time, there is no need to correspond to the diaphragm 21, that is, there is no need to reserve space for vibration of the diaphragm 21 in the height direction of the first magnetic circuit portions 12, at this time, the thickness from the surface of the first magnetic circuit portion 12 on the side of the back guide yoke 11 to the bottom wall 111 of the magnetic yoke 11 on the side of the back guide yoke 12 is the thickness or the height of the sounding unit 100 in the vibration direction of the diaphragm 21, so that the sounding unit 100 is effectively thinned; at the same time, the thickness of the first magnetic circuit portion 12 in the vibration direction of the diaphragm 21 can be effectively increased, thereby effectively improving the magnetic field performance of the first magnetic circuit portion 12 and increasing the BL value.

It can be understood that by making the top surface of the diaphragm 21 lower than the surface of the first magnetic circuit portion 12 on the side facing away from the magnetic yoke 11, the thickness or height of the sound generating unit 100 in the vibration direction of the diaphragm 21 can be effectively ensured, and the amplitude of the diaphragm 21 in the vibration direction thereof can be ensured. It should be noted that, when the sounding monomer 100 is applied to a module or an electronic device, the top surface of the diaphragm 21 is lower than the surface of the first magnetic circuit portion 12 on one side opposite to the magnetic yoke 11, so that the housing of the module or the electronic device does not need to reserve the vibration space of the diaphragm 21, and the thickness of the module or the electronic device can be further reduced, thereby realizing thinning.

In this embodiment, by providing the centering support 25, external current can be introduced into the first voice coil 23 by using the centering support 25, and meanwhile, the centering support 25 is used to center the vibration of the first voice coil 23, so as to avoid the first voice coil 23 from swinging or polarizing during the vibration process, thereby improving the sound production effect and the acoustic performance of the sound production unit 100.

According to the sounding unit 100, the magnetic circuit system 1 is arranged as the magnetic guide yoke 11 and the two first magnetic circuit parts 12, so that the two first magnetic circuit parts 12 are arranged at intervals and are connected with the magnetic guide yoke 11, an accommodating space 117 is formed between the two first magnetic circuit parts 12, each first magnetic circuit part 12 comprises a magnetic circuit assembly 121, the accommodating space 117 is used for providing mounting and vibrating space for the vibrating diaphragm 21 of the vibrating system 2, projections of the vibrating diaphragm 21 and the two first magnetic circuit parts 12 on the magnetic guide yoke 11 are not overlapped, the vibrating diaphragm 21 has sufficient vibrating space, the thickness of the magnetic circuit assembly 121 of the first magnetic circuit part 12 in the vibrating direction of the vibrating diaphragm 21 can be increased, the thickness of the magnetic circuit assembly 121 of the first magnetic circuit part 12 in the vibrating direction of the vibrating diaphragm 21 is increased, and compared with the traditional sounding unit in which the vibrating diaphragm and the magnetic circuit parts are arranged in the up-down direction, the thickness of the sounding unit 100 in the vibrating direction of the vibrating diaphragm 21 is effectively thinned; meanwhile, the two first voice coils 23 are respectively arranged corresponding to the magnetic circuit assemblies 121 of the two first magnetic circuit parts 12, and the two first voice coils 23 are connected with the vibrating diaphragm 21 through the framework 22, so that larger magnetic circuits can be respectively provided for the two first voice coils 23 through the magnetic circuit assemblies 121 of the two first magnetic circuit parts 12, BL values are improved, and the heat dissipation area can be effectively increased by utilizing the magnetic circuit assemblies 121 of the two first magnetic circuit parts 12, so that heat dissipation is facilitated when the sounding monomer 100 works; further, along the vibration direction of the diaphragm 21, the top surface of the diaphragm 21 is lower than the top surfaces of the two first magnetic circuit parts 12, so that the thin design of the sounding monomer 100 is realized, the sounding monomer 100 is applied to a module or a product, no additional vibration space is reserved for the whole machine, the whole machine end is further thin and light, the folded ring part 212 is protruded towards one side far away from the magnetic yoke 11, and the centering support piece 25 is arranged, so that the elastic arm part 252 of the centering support piece 25 corresponds to the folded ring part 212 of the diaphragm 21, the arrangement direction of the elastic arm part 252 is perpendicular to the arrangement direction of the two first magnetic circuit parts 12, the centering support piece 25 is utilized to perform a centering effect on the vibration of the first voice coil 23, and the first voice coil 23 is prevented from swinging or polarizing in the vibration process; moreover, the spring arm 252 is spaced from the first magnetic circuit portion 12 and does not interfere with each other, so that the volume of the first magnetic circuit portion 12 can be further increased, and the size of the first voice coil 23 can be further increased to further increase the product driving force factor BL, and the sound producing effect and the acoustic performance of the sound producing unit 100 can be improved.

Alternatively, the diaphragm 21 is square in shape. In this embodiment, the diaphragm 21 has two first sides 216 and two second sides 217 connected end to end, the two first sides 216 are respectively connected to the two first magnetic circuit portions 12, and the two second sides 217 are respectively connected to the magnetic yoke 11. It can be appreciated that the diaphragm 21 is directly connected with the magnetic circuit system 1, and the housing structure is omitted, so that the production cost is reduced, the structure is simplified, and meanwhile, the diaphragm 21, the two first magnetic circuit portions 12 and the magnetic yoke 11 enclose to form a vibration space. In the present embodiment, the first side 216 of the diaphragm 21 extends in the third direction, and the second side 217 of the diaphragm 21 extends in the second direction.

Of course, in other embodiments, the sounding unit 100 further includes a housing or a casing, where the housing or casing is disposed between the diaphragm 21 and the magnetic yoke 11, that is, the two second sides 217 of the diaphragm 21 are respectively connected to the magnetic yoke 11 through the housing or casing, which is not limited herein. Alternatively, the housing or shell and the magnetic yoke 11 may be provided as an integrally formed structure, which is not limited herein.

In one embodiment, the sounding unit 100 includes a housing, where the housing is used to accommodate and fix the vibration system 2 and the magnetic circuit system 1, the housing includes a bottom plate and a side wall plate, and the side wall plate and the bottom plate enclose an installation space; the magnetic yoke 11 is fixed on the surface of the bottom plate; or, the bottom plate is provided with a through hole, and the magnetic yoke 11 is embedded in the through hole; alternatively, the magnetically permeable yoke 11 is integrally formed with the base plate.

It will be appreciated that the housing may alternatively be of square frame construction, i.e. the housing has a cavity construction with two open ends, the magnetically permeable yoke 11 being connected to one side of the housing, the two first magnetic circuit portions 12 and the diaphragm 21 covering the opening in the other side of the housing and being opposite the magnetically permeable yoke 11. Alternatively, the housing and the magnetic yoke 11 may be integrally injection molded; or, the housing and the magnetic yoke 11 are connected by welding or bonding, and the present invention is not limited thereto. Of course, in other embodiments, the sounding unit 100 may not be provided with a housing, and the two first magnetic circuit portions 12 and the diaphragm 21 are directly connected to the magnetic yoke 11, which is not limited herein.

In the present embodiment, the housing is provided as the bottom plate and the side wall plate such that the side wall plate and the bottom plate enclose an installation space, thereby accommodating and fixing the vibration system 2 and the magnetic circuit system 1 by using the installation space. Optionally, the magnetic yoke 11 is fixed to the surface of the base plate, for example, by welding or bonding, which is not limited herein. Of course, the magnetically conductive yoke 11 and the bottom plate may be integrally formed, for example, by integral injection molding, integral stretching, or press molding, and the like, and the present invention is not limited thereto.

Of course, in other embodiments, the through hole is formed in the bottom plate, and the magnetic yoke 11 is embedded in the through hole, so that the magnetic yoke 11 seals the through hole of the bottom plate, and the like, which is not limited herein.

In the present embodiment, the sounding monomer 100 is applied to an electronic device, that is, the sounding monomer 100 can be installed in the electronic device through a housing. It should be noted that, the housing of the sounding unit 100 may be a housing or a box structure independent of the electronic device, and at this time, the components such as the magnetic circuit system 1 and the vibration system 2 of the sounding unit 100 are integrated into a whole structure by using the housing, so as to facilitate disassembly and assembly. Of course, the housing of the sounding unit 100 may be integrally formed with the housing or the case of the electronic device, so as to effectively improve the structural strength and sealing performance.

It can be understood that the housing is configured to accommodate the vibration system 2, the magnetic circuit system 1, and the like, so that the sounding unit 100 can be used as a separate component in an electronic device or a sounding module, which is not limited herein. Of course, in other embodiments, the sound generating unit 100 may be a module structure, and in this case, the vibration system 2, the magnetic circuit system 1, and other structures of the sound generating unit 100 are respectively mounted as a plurality of independent components on the housing of the module structure, which is not limited herein.

In one embodiment, the magnetic yoke 11 includes a bottom wall 111 and a side wall 112 disposed at an angle, and the side wall 112 and the bottom wall 111 enclose a cavity 113.

In the present embodiment, as shown in fig. 2 to 6, 8 and 9, the magnetic yoke 11 is an integral structure, and the bottom wall 111 and the side wall 112 are integrally formed. It will be appreciated that the bottom wall 111 of the yoke 11 may alternatively be a rectangular plate-like structure, with the side walls 112 disposed around the periphery of the bottom wall 111. Optionally, the side wall 112 is disposed perpendicular to the bottom wall 111.

The side wall 112 may be formed by bending or stretching the periphery of the bottom wall 111 toward one side. Of course, in other embodiments, the side wall 112 is in an annular structure, and the side wall 112 and the bottom wall 111 are connected by welding or bonding, which is not limited herein.

It will be appreciated that the two first magnetic circuit portions 12 are spaced apart in the cavity 113 of the magnetic yoke 11, i.e. portions of the two first magnetic circuit portions 12 are connected to the bottom wall 111 of the magnetic yoke 11 such that the two first magnetic circuit portions 12 are spaced apart and form a receiving space 117 open on one side with the bottom wall 111 of the magnetic yoke 11. In the present embodiment, the diaphragm 21 is disposed in the accommodating space 117 and between the two first magnetic circuit portions 12, two first sides 216 of the diaphragm 21 are respectively connected to the two first magnetic circuit portions 12, and two second sides 217 are respectively connected to the side walls 112, so that the diaphragm 21 is spaced from the bottom wall 111.

In an embodiment, the magnetic yoke 11 further includes two side plates 114 located in the accommodating cavity 113, the two side plates 114 are spaced apart from the bottom wall 111, the accommodating space 117 is located between the two side plates 114, a side of each side plate 114 facing away from the accommodating space 117 encloses with the side wall 112 to form an accommodating space 1141, each magnetic circuit assembly 121 is located in the accommodating space 1141 and is spaced apart from the side wall 112 and the side plate 114 to form a first magnetic gap 13, and one end of the first voice coil 23 is suspended in the first magnetic gap 13; wherein, two ends of each side plate 114 are further formed with a avoiding gap 1143 communicating the accommodating space 1141 and the accommodating space 117, and one end of the skeleton 22 away from the diaphragm 21 passes through the avoiding gap 1143 and is connected with the first voice coil 23.

In the present embodiment, as shown in fig. 8 and 9, by providing two side plates 114 on the bottom wall 111 of the magnetic yoke 11, the two side plates 114 are spaced apart in the cavity 113. Optionally, the side plate 114 is disposed perpendicular to the bottom wall 111. An accommodating space 117 is formed between the two side plates 114, that is, the accommodating space 117 is located between the two side plates 114, so that a side of each side plate 114 facing away from the accommodating space 117 encloses with the side wall 112 to form an accommodating space 1141, thereby facilitating the installation and fixation of the magnetic circuit assemblies 121 of the first magnetic circuit portions 12 by using the accommodating spaces 1141, so that the magnetic circuit assemblies 121 of each first magnetic circuit portion 12 are disposed in the accommodating space 1141 and are spaced apart from the side wall 112 and the side plates 114 to enclose the first magnetic gap 13.

It can be understood that the first magnetic gap 13 is formed between each first magnetic circuit portion 12 of the two first magnetic circuit portions 12 and the magnetic conductive yoke 11, so that each first voice coil 23 of the two first voice coils 23 is disposed in one first magnetic gap 13 and is connected with the diaphragm 21 through the skeleton 22, that is, the two first voice coils 23 are respectively connected with two sides of the diaphragm 21 through the skeleton 22, so that the two first voice coils 23 respectively drive the diaphragm 21 to vibrate and sound under the magnetic field effect of the two first magnetic circuit portions 12, thereby effectively improving the driving force, and further improving the BL value and the acoustic performance of the sound generating unit 100.

Alternatively, the two side plates 114 are arranged at intervals along the long axis direction of the magnet yoke 11. In the present embodiment, the two side plates 114 are arranged at intervals along the long axis side 1113 of the yoke 11 such that the two first magnetic circuit portions 12 are arranged at intervals along the extending direction of the long axis side 1113. Alternatively, the side plate 114 and the bottom wall 111 are integrally formed, so that the processing steps of the magnetic yoke 11 can be simplified, and the structural strength of the magnetic yoke 11 can be improved.

In this embodiment, as shown in fig. 8 and 9, two ends of each side plate 114 are further formed with an avoidance gap 1143 communicating the accommodating space 1141 and the accommodating space 117, and one end of the skeleton 22 away from the diaphragm 21 passes through the avoidance gap 1143 and is connected to the first voice coil 23. It will be appreciated that this arrangement facilitates connection of the armature 22 to the voice coil 23 such that the diaphragm 21 is connected to the two voice coils 23 on either side of the diaphragm 21 via the armature 22.

In order to ensure the balance of the air pressure inside and outside the sounding monomer 100 during the vibration of the diaphragm 21, in an embodiment, the magnetic conductive yoke 11 is further provided with a leakage hole 1142 communicating with the cavity 113. It will be appreciated that the leak holes 1142 communicate the internal vibration space of the sound emitting unit 100 with the external air pressure. In the present embodiment, the leakage holes 1142 include a plurality of leakage holes 1142 spaced apart from the sidewall 112.

Optionally, a plurality of leakage holes 1142 are spaced apart from the side wall 112 of the magnetic yoke 11. I.e., a plurality of leakage holes 1142 are spaced apart along the circumferential direction of the side wall 112. Of course, in other embodiments, the leakage hole 1142 may be disposed on the bottom wall 111 of the magnetic yoke 11, which is not limited herein. Alternatively, the leak holes 1142 may be circular holes, oval holes, bar holes, triangular holes, square holes or polygonal, shaped holes, etc., without limitation.

In one embodiment, as shown in fig. 8 and 9, a through hole 1112 is formed adjacent to each side plate 114 on the bottom wall 111, and each side plate 114 is formed by bending or stretching a side of the bottom wall 111 adjacent to the through hole 1112 toward the cavity 113. In this way, the structural strength of the yoke 11 is improved.

In an embodiment, the sounding unit 100 further includes a cover plate 115, and the cover plate 115 covers the through hole 1112. In the present embodiment, the bottom wall 111 is provided with a through hole 1112 adjacent to each side plate 114, and each side plate 114 is formed by bending one side of the bottom wall 111 adjacent to the through hole 1112 towards the inside of the cavity 113, and the sounding unit 100 further includes a cover plate 115, where the cover plate 115 covers the through hole 1112.

In this embodiment, as shown in fig. 2 to 6, 8 and 9, by providing the cover plate 115, the through hole 1112 is covered and sealed by the cover plate 115, so when the sounding unit 100 is installed in the module housing or the housing of the electronic device, in order to reduce the thickness or the height of the module or the electronic device in the vibration direction of the diaphragm 21, the bottom wall 111 of the magnetic yoke 11 of the sounding unit 100 is exposed out of the module housing or the housing of the electronic device, and at this time, the through hole 1112 is sealed by the cover plate 115, so as to ensure the sounding effect of the sounding unit 100, and avoid impurities and the like entering the sounding unit 100 through the through hole 1112, thereby affecting the sounding performance of the sounding unit 100.

Optionally, the bottom wall 111 of the magnetic yoke 11 is provided with a through hole 1112 adjacent to each side plate 114, and the cover plates 115 include two, and each cover plate 115 covers a through hole 1112, which is not limited herein. It will be appreciated that the thickness of the cover plate 115 is less than the thickness of the bottom wall 111 of the magnetic yoke 11. In this embodiment, the cover 115 is connected to the bottom wall 111 of the magnetic yoke 11 at a side facing away from the cavity 113.

Of course, in other embodiments, the cover plate 115 may be configured as an annular integrated structure, and the annular cover plate 115 covers the plurality of through holes 1112 at the same time, which is not limited herein.

In order to further reduce the thickness or height of the sounding body 100 in the vibration direction of the diaphragm 21, the external appearance of the sounding body 100 is improved. In an embodiment, a limiting groove 1111 is further disposed on a side of the bottom wall 111 facing away from the cavity 113, the through hole 1112 penetrates through the bottom wall 111 of the limiting groove 1111, and the cover plate 115 is limited in the limiting groove 1111 and covers the through hole 1112. Optionally, a side of the cover plate 115 facing away from the cavity 113 is disposed flush with a side of the bottom wall 111 facing away from the cavity 113.

In one embodiment, each magnetic circuit assembly 121 includes at least two first magnets 1211 and at least one first magnetic conductive plate 1212, the first magnets 1211 are stacked on the magnetic conductive yoke 11, and the first magnetic conductive plates 1212 are sandwiched between two adjacent first magnets 1211; the first magnets 1211 magnetize along the vibration direction of the diaphragm 21, and the magnetizing directions of two adjacent first magnets 1211 located at two sides of the first magnetic conductive plate 1212 are opposite.

Optionally, each magnetic circuit assembly 121 is disposed in a receiving space 1141 of the magnetic yoke 11. In the present embodiment, as shown in fig. 3, 5 and 6, by stacking the first magnet 1211 and the first magnetic conductive plate 1212 of the magnetic circuit assembly 121 in the accommodating space 1141 of the magnetic conductive yoke 11, the first magnet 1211 and the first magnetic conductive plate 1212 are spaced apart from the side wall 112 and the side plate 114 of the magnetic conductive yoke 11 to form the first magnetic gap 13, so that the first magnetic gap 13 is conveniently used to provide an installation space for the first voice coil 23.

Optionally, the first magnet 1211 includes a plurality, and the first magnetic conductive plate 1212 includes at least one, i.e., when the number of first magnets 1211 is N, the number of first magnetic conductive plates 1212 is N-1. In this embodiment, as shown in fig. 3, 5 and 6, the first magnet 1211 includes two and the first magnetic conductive plate 1212 includes one. Alternatively, the first magnet 1211, the first magnetic conductive plate 1212, and the first magnet 1211 are stacked on the bottom wall 111 of the magnetic yoke 11 along the vibration direction of the diaphragm 21. Alternatively, the two first magnets 1211 are magnetized along the vibration direction of the diaphragm 21, and the magnetizing directions of the two adjacent first magnets 1211 located at two sides of the first magnetic conductive plate 1212 are opposite.

In the present embodiment, the first magnet 1211 and the first magnetic conductive plate 1212 of the magnetic circuit assembly 121 have their peripheral edges spaced from the side wall 112 and the side plate 114 of the magnetic conductive yoke 11 to enclose the first magnetic gap 13. Optionally, the first magnet 1211 and the first magnetic conductive plate 1212 are provided in a plate shape. It will be appreciated that the first magnetic gap 13 may alternatively be square, rectangular or racetrack shaped, and that the shape of the first voice coil 23 is similar to the shape of the first magnetic gap 13. Optionally, the thickness of the first magnet 1211 is greater than the thickness of the first magnetic conductive plate 1212, so that the magnetic field strength of the magnetic circuit assembly 121 can be effectively ensured.

To facilitate connection of the voice coil 23 to the diaphragm 21 through the frame 22, in this embodiment, the side plate 114 extends along the short axis side 1114 of the magnetic yoke 11 and is spaced from the long axis side 1113 of the side wall 112 of the magnetic yoke 11 to form an avoidance gap 1143, that is, the first magnetic gap 13 communicates with the accommodating space 117 through the avoidance gap 1143.

In an embodiment, each first magnetic circuit portion 12 further includes a cover 123, each cover 123 covers a magnetic circuit assembly 121 and is connected to the magnetic conductive yoke 11, the periphery of the cover 123 extends toward one side of the diaphragm 21 to form an extension 1234, and the extension 1234 is connected to the diaphragm 21.

In this embodiment, as shown in fig. 1, 3, 5 and 6, the cover 123 is provided to cover the opening of the accommodating space 1141 and is connected with the magnetic yoke 11 and/or the magnetic circuit assembly 121, so that the cover 123 covers a magnetic circuit assembly 121, and thus the magnetic circuit assembly 121 of the first magnetic circuit portion 12 is fixed to the magnetic yoke 11. It will be appreciated that the first magnetic conductive plate 1212 is sandwiched between two adjacent first magnets 1211.

It is understood that the two first magnets 1211 are respectively connected to the bottom wall 111 and the cover 123 of the magnetic yoke 11. Optionally, the cover 123 is made of a magnetic conductive material. This arrangement effectively homogenizes the magnetism of the first magnet 1211 of the magnetic circuit assembly 121.

In one embodiment, the cover 123 includes a top plate 1231 and a surrounding plate 1232 disposed around the top plate 1231, the surrounding plate 1232 and the top plate 1231 enclose a cavity 1233, at least a portion of the magnetic circuit assembly 121 is accommodated in the cavity 1233 and connected to the top plate 1231, and the surrounding plate 1232 is connected to the magnetic yoke 11.

In this embodiment, as shown in fig. 1, 3, 5 and 6, by providing the cover 123 with a cavity 1233 formed by enclosing the top plate 1231 and the surrounding plate 1232, the mounting, fixing and limiting mounting of the first magnet 1211 and the first magnetic conductive plate 1212 can be achieved, and the side wall 112 and the side plate 114 of the magnetic conductive yoke 11 and the surrounding plate 1232 of the cover 123 can be spaced from the first magnet 1211 and the first magnetic conductive plate 1212 to form the first magnetic gap 13 in cooperation. Of course, the arrangement can also facilitate the installation and fixation of other components, such as the centering support 25, etc., without limitation.

In one embodiment, the periphery of the cover 123 extends toward one side of the diaphragm 21 to form an extension 1234, and the edges of the diaphragm 21 in the arrangement direction of the two first magnetic circuit portions 12 are connected to the extension 1234.

In this embodiment, as shown in fig. 1, 3, 5 and 6, the extension 1234 is formed on the periphery of the first magnetic circuit portion 12, that is, the periphery of the cover 123 extends toward one side of the diaphragm 21 to form the extension 1234, so that the diaphragm 21 is connected to the extension 1234, and thus the extension 1234 is connected and fixed with the diaphragm 21, so as to improve the installation stability of the diaphragm 21. It will be appreciated that the diaphragm 21 is sandwiched between the extension 1234 and the magnetically permeable yoke 11.

It will be appreciated that the extension 1234 is formed by the peripheral edge of the cover 123 extending toward the side of the diaphragm 21, i.e., the extension 1234 is formed by the end of the shroud 1232 of the cover 123 remote from the top plate 1231 extending toward the side facing away from the cavity 1233. Optionally, extension 1234 is disposed around the periphery of shroud 1232, without limitation.

It should be noted that, the distance from the diaphragm 21 to the outer surface of the top plate 1231 of the cover 123 of the first magnetic circuit portion 12 is defined as L, and the maximum amplitude of the diaphragm 21 is defined as Xmax, so that L is equal to or greater than Xmax, so that no additional reserved vibration space is needed at the whole machine end, which is beneficial to further lightening and thinning of the whole machine end.

In an embodiment, the diaphragm 21 includes a central portion 211, a ring portion 212 disposed around the central portion 211, and a fixing portion 213 disposed outside the ring portion 212.

Optionally, the central portion 211, the ring portion 212, and the fixing portion 213 are integrally formed. Optionally, a fixing 213 is connected to side wall 112 and first magnetic circuit portion 12.

In this embodiment, as shown in fig. 1, 3, 5, 6, and 10, the fixing portion 213, the folded ring portion 212, and the central portion 211 of the diaphragm 21 are sequentially connected into an integrally formed structure, thereby ensuring the vibration performance and structural strength of the diaphragm 21. Alternatively, the folded ring portion 212 is an upwardly convex structure protruding toward a side away from the yoke 11.

It will be appreciated that the diaphragm 21 is square in configuration. Such as rectangular or square, etc., without limitation. In the present embodiment, the fixing portion 213 of the diaphragm 21 has two first sides 216 and two second sides 217, and the two first sides 216 of the fixing portion 213 are respectively connected to the covers 123 of the two first magnetic circuit portions 12, that is, the two first sides 216 are respectively connected to the extensions 1234 of the two covers 123 of the two first magnetic circuit portions 12.

Optionally, the extension portion 1234 and the first side 216 of the fixing portion 213 may be connected and fixed by adhesive. In this embodiment, the extension 1234 is connected to a side of the first side 216 of the fixing portion 213 facing away from the accommodating space 117.

In one embodiment, the central portion 211 is provided with a hollow hole 2111, and the vibration system 2 further includes a dome 215, where the dome 215 is covered at the hollow hole 2111. It can be understood that, as shown in fig. 5 and 10, by providing the hollow hole 2111 at the central portion 211 of the diaphragm 21 and providing the dome 215 to cover the hollow hole 2111, the dome 215 can be utilized to improve the structural strength of the diaphragm 21, and the dome 215 can be utilized to seal the hollow hole 2111, so as to prevent impurities and the like from entering the sounding monomer 100 through the hollow hole 2111, and influence the acoustic performance of the sounding monomer 100.

To further increase the structural strength and rigidity of the dome 215, in one embodiment, the center of the dome 215 is provided with a protrusion 2151 or recess. It will be appreciated that the protrusions 2151 of the dome 215 may be raised structures that increase based on the thickness of the dome 215. Of course, in other embodiments, the protrusion 2151 of the dome 215 may be a protrusion structure formed by protruding one side of the dome 215 toward the other side, such that one side of the dome 215 is concave and the other side is convex, which is not limited herein.

In an embodiment, the periphery of the dome 215 extends toward a side away from the diaphragm 21 to form a rim 2152, and a projection of the rim 2152 on the diaphragm 21 coincides with a portion of the ring 212 along the vibration direction of the diaphragm 21. This further increases the effective radiating area of the diaphragm 21.

It will be appreciated that the periphery of the dome 215 is connected to the side of the central portion 211 facing away from the receiving space 117. Of course, in other embodiments, the periphery of the dome 215 may be connected to the side of the central portion 211 facing the accommodating space 117. In the present embodiment, as shown in fig. 1, 3, 5 and 6, the edge 2152 of the dome 215 is located on the side of the diaphragm 21 facing away from the accommodating space 117.

In the present embodiment, by disposing the edge portion 2152 of the dome 215 to extend toward the side away from the diaphragm 21 such that the projection of the edge portion 2152 on the diaphragm 21 coincides with the partial rim portion 212 in the vibration direction of the diaphragm 21, the effective radiation area of the diaphragm 21 can be further enhanced.

In an embodiment, the diaphragm 21 further includes a bending portion 214 formed by bending the fixing portion 213 toward the magnetic yoke 11, and the bending portion 214 is connected to the magnetic yoke 11.

In the present embodiment, as shown in fig. 1, 5 and 10, the bending portion 214 is provided at the periphery of the diaphragm 21, so that the bending portion 214 is connected to the magnetic yoke 11, thereby improving the connection stability of the diaphragm 21. It can be appreciated that the bending portion 214 is connected to a side of the fixing portion 213 away from the ring portion 212 and disposed at an angle with respect to the fixing portion 213, and the bending portion 214 is connected to the side wall 112 of the magnetic yoke 11. Alternatively, the bending portion 214 is disposed perpendicular to the fixing portion 213.

Alternatively, the bending portion 214 is formed by bending a side of the fixing portion 213 away from the bending portion 212 toward the guide yoke 11. This arrangement is advantageous in ensuring structural strength of the fixing portion 213 and the bending portion 214 of the diaphragm 21. In this embodiment, the central portion 211, the ring portion 212, the fixing portion 213, and the bending portion 214 are integrally formed.

In the present embodiment, the bending portion 214 is formed by bending the second side 217 of the fixing portion 213 toward the guide yoke 11. It can be understood that the two second sides 217 of the fixing portion 213 of the diaphragm 21 are respectively connected with the bending portion 214, and no other structure is provided on the two first sides 216 of the fixing portion 213 of the diaphragm 21, so that the connection with the extending portions 1234 of the two cover bodies 123 in the two first magnetic circuit portions 12 can be facilitated, and the vibration performance of the diaphragm 21 is not affected; meanwhile, the smooth flow of the air flow is facilitated.

Alternatively, the bending portion 214 and the side wall 112 of the magnetic conductive yoke 11 may be connected and fixed by gluing. In order to facilitate limiting the diaphragm 21, the diaphragm 21 is prevented from falling due to unstable fixation, in this embodiment, the bending portion 214 is connected to the outer side of the side wall 112 of the magnetic yoke 11, so that the end portion of the side wall 112 of the magnetic yoke 11 is in limiting abutment with the fixing portion 213 of the diaphragm 21, so as to support and fix the diaphragm 21.

In one embodiment, the frame 22 includes a first support portion 221, a first connection portion 222, and a second support portion 223 connected to each other, the first support portion 221 is connected to the inner fixing portion 253, and the second support portion 223 is connected to the first voice coil 23.

In this embodiment, as shown in fig. 3, 5, 6 and 7, the frame 22 has one end connected to the diaphragm 21 and the other end connected to the first voice coil 23 located in the first magnetic gap 13. It can be appreciated that the first supporting portion 221, the first connecting portion 222 and the second supporting portion 223 of the skeleton 22 are integrally formed, so that the structural strength of the skeleton 22 can be ensured.

It can be understood that the framework 22 is used for installing and fixing the first voice coil 23, ensuring that the first voice coil 23 is suspended in the first magnetic gap 13, and transmitting the vibration of the first voice coil 23 to the diaphragm 21, so as to realize vibration transmission and ensure normal sounding of the diaphragm 21. In this embodiment, the first supporting portion 221 of the skeleton 22 is connected to the central portion 211 of the diaphragm 21, and the second supporting portion 223 of the skeleton 22 is connected to the first voice coil 23, that is, the second supporting portion 223 of the skeleton 22 extends into the first magnetic gap 13 through the avoidance gap 1143 and is connected to the first voice coil 23. Alternatively, the second support portion 223 of the bobbin 22 is coupled to the lower end of the first voice coil 23, so that the mounting stability of the bobbin 22 and the first voice coil 23 can be improved.

In this embodiment, the skeleton 22 is located below the diaphragm 21, and in order to avoid the annular portion 212 of the diaphragm 21, the skeleton 22 is provided with an avoidance region 224 corresponding to the annular portion 212. In this embodiment, the skeleton 22 may be selected as a directional frame structure. The shape profile of the second support portion 223 of the bobbin 22 is similar to the end surface shape profile of the first voice coil 23 so as to fix the first voice coil 23 and promote the support stability of the first voice coil 23.

Optionally, the two skeletons 22 are included, and the two skeletons 22 are symmetrically disposed. It can be appreciated that the two skeletons 22 are located at opposite sides of the diaphragm 21 and are symmetrically arranged with respect to the diaphragm 21. In this embodiment, the two skeletons 22 are disposed corresponding to the two first sides 216 of the diaphragm 21.

In the present embodiment, a support stand is provided at an end of the first connection portion 222 adjacent to the second support portion 223. It can be appreciated that the supporting table is disposed on the framework 22, so that the supporting table is used to provide an installation position for the conductive structures such as the centering support piece 25, so that the sounding unit 100 can be conveniently connected and conducted with an external circuit through the lead wire of the first voice coil 23 of the conductive structure such as the centering support piece 25.

It will be appreciated that the first connection portion 222 of the bobbin 22 is provided with two support tables located at both sides of the avoidance space, that is, at both ends of the first voice coil 23. Alternatively, the first voice coil 23 extends along the short axis side 1114 of the yoke 11, and the two support stands are spaced apart along the short axis side 1114 of the yoke 11.

Alternatively, the bobbins 22 include four, one end of each bobbin 22 is connected to the diaphragm 21, and the other end of the bobbin 22 is connected to the first voice coil 23. In the present embodiment, two bobbins 22 of the four bobbins 22 are spaced apart along the short axis side 1114 of the magnetic yoke 11 and located at both ends of the first voice coil 23, that is, two bobbins 22 of the four bobbins 22 are located at both ends of the side plate 114. It will be appreciated that the second support portion 223 of each armature 22 extends into the first magnetic gap 13 through the relief notch 1143 and is coupled to the first voice coil 23.

In one embodiment, the centering support 25 includes an outer fixing portion 251, an inner fixing portion 253 located inside the outer fixing portion 251, and a spring arm portion 252 connecting the outer fixing portion 251 and the inner fixing portion 253, the outer fixing portion 251 is disposed in a ring shape, the outer fixing portion 251 surrounds the two magnetic circuit assemblies 121 and is connected to the magnetic yoke 11, the inner fixing portion 253 is sandwiched between the central portion 211 and the frame 22, and the spring arm portion 252 extends along the arrangement direction of the two first magnetic circuit portions 12.

In this embodiment, as shown in fig. 5, 7 and 11, the outer fixing portion 251 of the centering support 25 has a square annular structure, the inner fixing portion 253 has a square annular structure, at this time, the outer fixing portion 251 of the centering support 25 is disposed between the diaphragm 21 and the magnetic yoke 11, the spring arm portion 252 corresponds to the ring-folded portion 212 of the diaphragm 21, and the inner fixing portion 253 is connected to the central portion 211 of the diaphragm 21. Optionally, the outer fixing portion 251, the spring arm portion 252 and the inner fixing portion 253 are integrally formed.

It should be noted that, by providing the centering support 25 as two nested outer fixing portions 251 and inner fixing portions 253 and connecting the outer fixing portions 251 and the inner fixing portions 253 by the spring arm portions 252, the outer fixing portions 251 can be fixed by mounting the cover 123 of the magnetic yoke 11, the diaphragm 21 and the first magnetic circuit portion 12, so as to fix the centering support 25, and simultaneously, the inner fixing portions 253 are connected to the central portion 211 of the diaphragm 21, thereby ensuring the connection stability of the diaphragm 21 and the centering support 25. In this embodiment, the outer fixing portion 251, the spring arm portion 252 and the inner fixing portion 253 are located on the same plane.

It is understood that the spring arm 252 corresponds to the folded ring portion 212 of the diaphragm 21. In order to avoid interference between the ring-folded portion 212 of the diaphragm 21 and the spring arm portion 252 of the centering support 25 during vibration, the ring-folded portion 212 of the diaphragm 21 is configured as a convex hull structure protruding toward a side away from the magnetic yoke 11.

Further, in the projection along the first direction, the spring arm portions 252 of the centering support 25 correspond to edge positions on both sides of the third direction of the diaphragm 21. In this way, spring arm 252 is spaced apart from and does not interfere with first magnetic circuit portion 12, and the volume of first magnetic circuit portion 12 can be further increased and the size of first voice coil 23 can be further increased to further increase product driving force factor BL.

In this embodiment, as shown in fig. 5 and 7, each first voice coil 23 is disposed in a first magnetic gap 13 and is connected to the inner fixing portion 253 through the frame 22, so that the vibration of the first voice coil 23 can be transmitted to the inner fixing portion 253 of the centering support 25 and the diaphragm 21 through the frame 22, thereby centering the vibration of the first voice coil 23 by the centering support 25, avoiding the first voice coil 23 from swinging or polarizing during the vibration process, and improving the sound producing effect and the acoustic performance of the sound producing unit 100.

Alternatively, the top surface of diaphragm 21 is lower than the side surface of first magnetic path portion 12 facing away from magnetic yoke 11. In the present embodiment, the ring-folded portion 212 of the diaphragm 21 protrudes upward, and at this time, the top surface of the ring-folded portion 212 of the diaphragm 21 is lower than the surface of the first magnetic circuit portion 12 on the side facing away from the magnetic yoke 11.

In this embodiment, as shown in fig. 7 and 11, the outer fixing portion 251 has two first sides and two second sides connected end to end, each first side is sandwiched between the first magnetic circuit portion 12 and the magnetic conductive yoke 11, and at least part of each second side is sandwiched between the fixing portion 213 and the magnetic conductive yoke 11; wherein, the spring arm portions 252 include two spring arm portions 252, one end of each spring arm portion 252 is connected to the second side, and the other end of each spring arm portion 252 is connected to one side of the inner fixing portion 253 corresponding to the second side.

In an embodiment, the inner fixing portion 253 of the centering support 25 is square and annular, the inner fixing portion 253 has four corners 256, each corner 256 is provided with a bonding pad, the frame 22 includes four, each first voice coil 23 is located between two frames 22, one end of each frame 22 is connected to the bonding pad, the other end of the frame 22 is connected to the first voice coil 23 and electrically connected to the leads of the first voice coil 23, so that the two first voice coils 23 are connected in series through the centering support 25 and the frame 22.

In another embodiment, the outer fixing portion 251 of the centering support 25 may be a ring or frame structure, and the centering support 25 includes a plurality of elastic arm portions 252 and a plurality of inner fixing portions 253, wherein one end of each elastic arm portion 252 is connected to the outer fixing portion 251, and the other end is connected to one inner fixing portion 253. Alternatively, the plurality of inner fixing portions 253, the plurality of spring arm portions 252, and the outer fixing portion 251 of the centering support 25 are integrally formed.

Of course, in other embodiments, the centering tabs 25 are one, two, or four. Of course, when the centering support 25 is one, the structure of the centering support 25 is as described above, and the outer fixing portion 251 of the centering support 25 may be a ring or frame structure. When the number of the centering support pieces 25 is two, the two centering support pieces 25 are symmetrically arranged. Alternatively, the two centering tabs 25 may be symmetrically disposed on the two long axis sides 1113 of the magnetic yoke 11; alternatively, the two centering tabs 25 may be symmetrically disposed on the two short axis sides 1114 of the magnetic yoke 11, which is not limited herein. At this time, each positioning stay 25 includes one outer fixing portion 251, two spring arm portions 252, and two inner fixing portions 253. When the number of the centering pieces 25 is four, the four centering pieces 25 are provided at the four corner positions of the yoke 11, respectively, and are not limited herein. At this time, each of the positioning tabs 25 includes an outer fixing portion 251, a spring arm portion 252, and an inner fixing portion 253, which are not limited herein.

Alternatively, the centering tabs 25 may be selected as one. In one embodiment, the outer fixing portion 251 has two first edges and two second edges connected end to end, and a corner 256 is formed at the connection between each first edge and one second edge; the spring arm portions 252 include four, one end of each spring arm portion 252 is connected to the corner portion 256, the other end of each spring arm portion 252 is connected to the inner fixing portion 253, and the inner fixing portion 253 is connected to the bobbin 22 and electrically connected to the leads of the first voice coil 23.

It will be appreciated that two spring arm portions 252 of the four spring arm portions 252 of the centering support 25 are located at both ends of each of the first voice coils 23 in the third direction. In the present embodiment, the first edge of the outer fixing part 251 extends in the third direction, and the second edge extends in the second direction.

In the present embodiment, as shown in fig. 5, 7 and 11, each first side of the centering support 25 is sandwiched between the first magnetic circuit portion 12 and the magnetic yoke 11, and at least part of each second side is sandwiched between the fixing portion 213 and the magnetic yoke 11.

In an embodiment, the outer fixing portion 251 of the centering support 25 may be a directional ring or a frame structure, and the outer fixing portion 251, the elastic arm portions 252 and the inner fixing portions 253 may be integrally formed, so that the structural strength of the centering support 25 can be ensured. Alternatively, the outer fixing portion 251 of the centering support 25 is flush with the plurality of spring arm portions 252 and the plurality of inner fixing portions 253, and the plurality of spring arm portions 252 and the plurality of inner fixing portions 253 are located inside the outer fixing portion 251, so that the centering support 25 can be fixed with the cover 123 of the diaphragm 21 and the first magnetic circuit portion 12 by the yoke 11, elasticity of the spring arm portions 252 of the centering support 25 can be ensured, and the spring arm portions 252 are connected with the bobbin 22 and electrically connected with the first voice coil 23.

It will be appreciated that the outer fixing portion 251 has a square ring shape, the outer fixing portion 251 has four corners 256, and the spring arm portions 252 include four spring arm portions 252, each spring arm portion 252 being disposed corresponding to a corner 256. Alternatively, the four spring arms 252 of the four corners 256 of the centering support 25 are all located outside the diaphragm 21. In this embodiment, the four corners 256 of the outer fixing portion 251 of the centering support 25 are further provided with outer pads for connecting to an external circuit. In this embodiment, the yoke 11 is formed with a space for avoiding the four corners 256 of the yoke 25, that is, the four corners 256 of the yoke 25 are exposed outside the side wall 112 of the yoke 11.

In this embodiment, in order to further protect the four corners 256 of the centering support 25, the extension 1234 of the cover 123 of the first magnetic circuit portion 12 is connected to the side of the corner 256 facing away from the outer pad, so that the four corners 256 of the centering support 25 are prevented from being damaged by collision with foreign objects.

It will be appreciated that, in order to further fix the inner fixing portion 253 of the centering plate 25 to ensure the firmness of the connection of the inner fixing portion 253 with the leads of the first voice coil 23, the bobbin 22 is provided with a support stand adjacent to the first voice coil 23, and the inner fixing portion 253 is connected with the support stand and with the leads of the first voice coil 23. In order to ensure deformability of the centering pin 25, the spring arm 252 has at least one bend.

In one embodiment, the outer fixing portion 251 has a square ring shape, and each first voice coil 23 extends along the short axis direction of the outer fixing portion 251 and is located between two spring arm portions 252, and two ends of each first voice coil 23 are respectively provided with an input lead and an output lead, and the input lead and the output lead are respectively connected with one spring arm portion 252. It will be appreciated that the two first voice coils 23 are connected in series by the centering disc 25.

In an embodiment, the magnetic circuit system 1 further includes a central magnetic circuit 14, where the central magnetic circuit 14 is disposed in the accommodating space 117 and is opposite to and spaced from the diaphragm 21 in the vibration direction of the diaphragm 21, and the top surface of the central magnetic circuit 14 is lower than the top surfaces of the two first magnetic circuit portions 12; the vibration system 2 further includes a center voice coil 24, the center voice coil 24 being disposed corresponding to the center magnetic circuit 14, and one end of the center voice coil 24 being connected to the diaphragm 21.

In the present embodiment, as shown in fig. 5 to 7, by disposing the center magnetic circuit 14 in the accommodation space 117, the center magnetic circuit 14 is located in the vibration space, and is disposed opposite to and spaced from the diaphragm 21. Alternatively, the projection of the center magnetic circuit 14 in the vibration direction of the diaphragm 21 is located within the projection range of the diaphragm 21 in the vibration direction of the diaphragm 21. And set up center voice coil 24 for the one end and the vibrating diaphragm 21 of center voice coil 24 are connected, and center voice coil 24's the other end is hung in center magnetic gap 16, so can further improve the magnetic field strength of sound production monomer 100, increase magnetic field driving force, further improve the BL value, with the acoustics performance that promotes sound production monomer 100.

It can be understood that the thickness of the central magnetic circuit 14 in the vibration direction of the diaphragm 21 is smaller than the thickness of the magnetic circuit 1 in the vibration direction of the diaphragm 21, so that the thickness or the height of the sounding unit 100 in the vibration direction of the diaphragm 21 can be effectively ensured. Compared with the traditional sounding monomer, the sounding monomer 100 of the application not only realizes thin design, but also improves magnetic field performance and effectively improves BL value. Alternatively, the thickness of the central magnetic circuit 14 is less than or equal to 1/2 of the thickness of the first magnetic circuit portion 12 in the vibration direction of the diaphragm 21.

In one embodiment, the magnetic yoke 11 further includes a plurality of vertical plates 116, the plurality of vertical plates 116 are disposed in the accommodating space 117 at intervals, the central magnetic circuit 14 is disposed between the plurality of vertical plates 116 and is spaced from the vertical plates 116 to form the central magnetic gap 16, and one end of the central voice coil 24 is suspended from the central magnetic gap 16.

In the present embodiment, as shown in fig. 5 and 9, a plurality of risers 116 are provided in the accommodating space 117 at intervals, and the center magnetic circuit 14 is located between the plurality of risers 116 and spaced from the risers 116 to enclose the center magnetic gap 16. It will be appreciated that the riser 116 of the magnetic yoke 11 may be an annular structure located within the receiving space 117; alternatively, the plurality of vertical plates 116 of the magnetic yoke 11 may be provided, and the plurality of vertical plates 116 may be formed in an annular structure by being spaced apart from each other in the accommodating space 117.

In the present embodiment, the yoke 11 includes two or four risers 116. When there are two vertical plates 116, the two vertical plates 116 are arranged at intervals along the long axis side 1113 of the magnetic yoke 11; alternatively, two risers 116 are spaced along the short axis side 1114 of the magnetic yoke 11. When the number of the vertical plates 116 is four, two vertical plates 116 of the four vertical plates 116 are arranged at intervals along the long axis side 1113 of the magnetic yoke 11, and the other two vertical plates 116 are arranged at intervals along the short axis side 1114 of the magnetic yoke 11, so that the four vertical plates 116 enclose to form an annular structure, and at this time, the central magnetic circuit 14 is arranged in the annular structure formed by enclosing the four vertical plates 116 and is spaced from the four vertical plates 116 to form the central magnetic gap 16.

It will be appreciated that, in order to facilitate adjusting the height of the center voice coil 24 within the center magnetic gap 16, the center portion 211 of the diaphragm 21 is provided with a boss portion corresponding to the center voice coil 24, and the boss portion is connected to the center voice coil 24. As shown in fig. 6, the diaphragm 21 protrudes toward the yoke 11 to form a convex portion, one end of the center voice coil 24 is connected to the convex portion, and the other end of the center voice coil 24 is suspended in the center magnetic gap 16.

Alternatively, the convex portion is recessed from the central portion 211 of the diaphragm 21 toward the side of the yoke 11 away from the yoke 11, so that the diaphragm 21 forms a convex shape toward the side of the yoke 11. Of course, in other embodiments, the protruding portion may be formed by directly protruding the diaphragm 21 toward one side of the magnetic yoke 11; alternatively, the diaphragm 21 may be bonded to the yoke 11 by bonding or the like.

In an embodiment, the sounding unit 100 includes a magnetic circuit 1 and a vibration system 2, where the magnetic circuit 1 includes a magnetic yoke 11, a central magnetic circuit 14 disposed on the magnetic yoke 11, and two first magnetic circuit portions 12, an accommodating space 117 is formed between the two first magnetic circuit portions 12, the central magnetic circuit 14 is disposed in the accommodating space 117, the vibration system 2 includes a diaphragm 21, a frame 22, a central voice coil 24, and two first voice coils 23, the diaphragm 21 is disposed in the accommodating space 117 and connected to the two first magnetic circuit portions 12, the central voice coil 24 is disposed corresponding to the central magnetic circuit 14 and has one end connected to the diaphragm 21, and each first voice coil 23 is disposed corresponding to one of the first magnetic circuit portions 12 and is connected to the diaphragm 21 through the frame 22.

In the present embodiment, as shown in fig. 9, the central magnetic circuit 14 and the two first magnetic circuit portions 12 of the magnetic circuit system 1 share one magnetic yoke 11, thereby effectively increasing the mounting stability and structural uniformity.

It can be appreciated that the magnetic yoke 11 includes a bottom wall 111 and a side wall 112 disposed at an angle, and the side wall 112 and the bottom wall 111 enclose a cavity 113. The magnetic guiding yoke 11 further includes two side plates 114 and a plurality of vertical plates 116, the two side plates 114 are arranged in the accommodating cavity 113 at intervals, the bottom wall 111 is arranged at intervals, the accommodating space 117 is arranged between the two side plates 114, one side of each side plate 114 facing away from the accommodating space 117 encloses with the side wall 112 to form an accommodating space 1141, each first magnetic circuit portion 12 is arranged in one accommodating space 1141 and is spaced from the side wall 112 and the side plates 114 to form a first magnetic gap 13, the plurality of vertical plates 116 are arranged in the accommodating space 117 at intervals, and the central magnetic circuit 14 is arranged between the plurality of vertical plates 116 and is spaced from the vertical plates 116 to form a central magnetic gap 16.

In the present embodiment, the bottom wall 111, the side walls 112, the two side plates 114 and the plurality of vertical plates 116 of the magnetic yoke 11 are optionally provided as an integrally formed structure, which can effectively improve the structural strength of the magnetic yoke 11. Alternatively, the magnetically permeable yoke 11 is rectangular in configuration. The two multiple plates 116 of the magnetic yoke 11 are located between the two side plates 114. Alternatively, the two side plates 114 of the magnetic yoke 11 are spaced apart along the long axis side 1113 of the magnetic yoke 11 and extend along the short axis side 1114 of the magnetic yoke 11 and are spaced apart from the side walls 112 of the short axis side 1114 of the magnetic yoke 11.

Alternatively, the riser 116 is integrally formed with the bottom wall 111. And the vertical plate 116 is disposed perpendicularly to the bottom wall 111. In this embodiment, the magnetic yoke 11 is provided with a through hole 1112 corresponding to each vertical plate 116, and the vertical plates 116 are optionally bent from a side of the bottom wall 111 adjacent to the through hole 1112 toward the cavity 113.

Of course, in other embodiments, the central magnetic circuit 14 and the two first magnetic circuit portions 12 of the magnetic circuit system 1 may not share one magnetic yoke 11, where the magnetic yoke 11 includes a plurality of split lower yokes, and the central magnetic circuit 14 and the two first magnetic circuit portions 12 are respectively disposed corresponding to one lower yoke, which is not limited herein.

In one embodiment, the central magnetic circuit 14 is disposed on the magnetic conductive yoke 11, the central magnetic circuit 14 includes a central magnet 141 and a central magnetic conductive plate 142 that are stacked, and the central magnet 141 is sandwiched between the magnetic conductive yoke 11 and the central magnetic conductive plate 142; the magnetic yoke 11 and/or the central magnetic conductive plate 142 are provided with an opening 15, and the central magnet 141 is provided with a protrusion 1412 corresponding to the opening 15, and the protrusion 1412 is limited in the opening 15. In this embodiment, the magnetic yoke 11 may be an integrally formed structure and connected to the first magnetic circuit portion 12 and the central magnetic circuit 14, or may be a plurality of separate structures respectively connected to the first magnetic circuit portion 12 and the central magnetic circuit 14.

In the present embodiment, as shown in fig. 5 to 7, by disposing the center magnetic circuit 14 as a center magnet 141 and a center magnetically permeable plate 142 that are stacked, the center magnet 141 is sandwiched between the center magnetically permeable plate 142 and the magnetically permeable yoke 11 such that the peripheral edges of the center magnet 141 and the center magnetically permeable plate 142 are spaced from the riser 116 to cooperatively form the center magnetic gap 16.

Alternatively, the center magnet 141 and the center magnetically permeable plate 142 may be selected to have plate-like structures. Of course, in other embodiments, the central magnet 141 and the central magnetic conductive plate 142 may be provided in a ring structure or a plurality of bar structures, which is not limited herein. The shape of the first magnetic gap 13 may be a square ring shape, a rectangular ring shape, or a racetrack shape. Of course, the shape of the central magnetic gap 16 may be a square ring, a rectangular ring, or a racetrack shape, which is not limited herein.

In this embodiment, as shown in fig. 5 to 7, an opening 15 is provided in the magnetic yoke 11 and/or the central magnetic plate 142, and a protrusion 1412 is provided in the central magnet 141 corresponding to the opening 15, so that the protrusion 1412 is limited in the opening 15. Such an arrangement can allow the central magnet 141 to increase structural strength by providing the protrusion 1412, avoiding the breakage or the like of the central magnet 141 during transportation, cleaning, magnetizing due to the reduced thickness.

It can be appreciated that the center magnet 141 can effectively increase the thickness and structural strength of the center magnet 141 by providing the protrusion 1412, thereby improving mass productivity. In the present embodiment, as shown in fig. 5 to 7, the center magnet 141 has a first surface 1411 and a second surface disposed away from each other, the first surface 1411 being connected to the center magnetically permeable plate 142, and the second surface being connected to the magnetically conductive yoke 11.

It should be noted that, the central magnetic conductive plate 142 is provided with an opening 15, the first surface 1411 is convexly provided with a protrusion 1412, and the protrusion 1412 is limited in the opening 15; or, the magnetic yoke 11 is provided with an opening 15, the second surface is convexly provided with a convex part 1412, and the convex part 1412 is limited in the opening 15; alternatively, the central magnetic conductive plate 142 is provided with an opening 15, the first surface 1411 is provided with a protrusion 1412, the magnetic conductive yoke 11 is provided with an opening 15, the second surface is provided with a protrusion 1412, and each protrusion 1412 is limited in an opening 15, which is not limited herein.

Alternatively, the percentage of the projected area of the protrusion 1412 to the projected area of the center magnet 141 is 10% or more and 75% or less in the vibration direction of the vibration system 2. Therefore, the problem that the center magnet 141 is too thin and is easy to break can be effectively solved, and the effect of improving the magnetic circuit performance can be achieved.

In one embodiment, an acoustic path 218 is formed between the top surface of the edge of the diaphragm 21 extending in the arrangement direction of the two first magnetic path portions 12 and the two first magnetic path portions 12.

In this embodiment, as shown in fig. 1 and 10, the fixing portion 213 of the second side 217 of the diaphragm 21 is located on the same plane as the central portion 215 of the diaphragm 21, and at this time, the fixing portion 213 of the second side 217 of the diaphragm 21 is lower than the top surface of the first magnetic circuit portion 12, so that an acoustic path 218 is formed between the fixing portion 213 of the second side 217 of the diaphragm 21 and the two first magnetic circuit portions 12. When the sounding unit 100 is mounted on the sounding module 400 or the electronic device, the sounding space communicated with the sounding channel 218 does not need to be reserved in the height direction, which is beneficial to the thinning design of the sounding module 400 or the electronic device.

As shown in fig. 12 to 16, the present invention further provides a sound generating module 400, where the sound generating module 400 includes a module housing 300 and the sound generating unit 100, and the sound generating unit 100 is disposed on the module housing 300. The specific structure of the sounding unit 100 refers to the foregoing embodiments, and since the sounding module 400 adopts all the technical solutions of all the foregoing embodiments, at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, and will not be described in detail herein.

In this embodiment, the module housing 300 is provided with a mounting cavity 310 and a sound outlet 311 communicating with the mounting cavity 310, the sound generating unit 100 is disposed in the mounting cavity 310, a front sound cavity 320 is formed between the top surface of the diaphragm 21 and the two first magnetic circuit portions 12, and the front sound cavity 320 communicates with the sound outlet 311.

In an embodiment, the diaphragm 21 of the sounding unit 100 is disposed corresponding to the sounding hole 311, and the sounding module 400 is in a positive sounding structure.

It will be appreciated that the sound module 400 further includes a flexible circuit board, at least one end of which is connected to the sound unit 100 is located in the mounting cavity 310 of the module housing 300. Of course, in other embodiments, the flexible circuit board may be disposed entirely within the mounting cavity 310 of the module housing 300, which is not limited herein.

In another embodiment, the sound outlet 311 is located on the side 350 of the module housing 300, and the sound outlet 218 is formed between the top surface of the edge of the diaphragm 21 extending along the arrangement direction of the two first magnetic circuit portions 12 and the two first magnetic circuit portions 12, and the sound outlet 311 and the front sound chamber 320 are communicated through the sound outlet 218. Further, the module housing 300 is further provided with a sound outlet channel which is communicated with the mounting cavity 310, and the front sound cavity 320 is communicated with the sound outlet hole 311 through the sound outlet channel 218 and the sound outlet channel, so that the sound producing module 400 is in a side sound outlet structure.

In an embodiment, as shown in fig. 14, the sounding module 400 includes a module housing 300 and a sounding unit 100, the module housing 300 is provided with a mounting cavity 310 and a sounding hole 311 communicated with the mounting cavity 310, the sounding unit 100 is disposed in the mounting cavity 310, the module housing 300 encloses a front sound cavity 320 communicated with the sounding hole 311, the sounding unit 100 includes a magnetic circuit system 1 and a vibration system 2, the magnetic circuit system 1 includes a magnetic yoke 11 and two first magnetic circuit portions 12 disposed in the magnetic yoke 11, a receiving space 117 is formed between the two first magnetic circuit portions 12, each first magnetic circuit portion 12 cooperates with the magnetic yoke 11 to form a first magnetic gap 13, the vibration system 2 includes a diaphragm 21, a frame 22 and two first voice coils 23, the diaphragm 21 is disposed in the receiving space 117 and connected with the two first magnetic circuit portions 12, each first voice coil 23 is disposed in the first magnetic gap 13 and connected with the diaphragm 21 through the frame 22, a front sound cavity 320 is formed between the top surface of the diaphragm 21 and the two first magnetic circuit portions 12, and the front sound cavity 320 is communicated with the sounding hole 311.

It will be appreciated that, as shown in fig. 16, the sounding body 100 is disposed in the mounting cavity 310, and the two first magnetic circuit portions 12 of the sounding body 100 and the cavity wall of the mounting cavity 310 enclose a front acoustic cavity 320 opposite to the diaphragm 21, and the front acoustic cavity 320 communicates with the sound outlet channel.

In an embodiment, the module housing 300 is further provided with a fixing hole 360 corresponding to at least one first magnetic circuit portion 12, and at least part of the first magnetic circuit portion 12 is located in the fixing hole 360 to seal the fixing hole 360, so that the two first magnetic circuit portions 12 and the diaphragm 21 enclose the front acoustic cavity 320 with the module housing 300.

It will be appreciated that, as shown in fig. 12, 13 and 15, by providing the fixing hole 360 in the module case 300 such that at least part of the first magnetic circuit portion 12 is located in the fixing hole 360 to seal the fixing hole 360, the thickness or height of the sound emitting module 400 can be effectively reduced. In the present embodiment, the module housing 300 is provided with a fixing hole 360 corresponding to each first magnetic circuit portion 12, and each first magnetic circuit portion 12 is located in the fixing hole 360 to seal the fixing hole 360.

In the present embodiment, the top plate 1231 of the cover 123 of the first magnetic circuit portion 12 is exposed to the fixing hole 360, and the inner wall of the fixing hole 360 is hermetically connected with the outer wall of the enclosure plate 1232 of the cover 123. Optionally, the cover 123 of the first magnetic circuit portion 12 is fixed to the module case 300 by an adhesive.

Alternatively, the side of the first magnetic circuit portion 12 facing away from the magnetic yoke 11 is disposed flush with the outer surface of the module case 300. In the present embodiment, the top plate 1231 of the cover 123 of the first magnetic circuit portion 12 is disposed flush with the outer surface of the module housing 300 on the side facing away from the magnetic yoke 11, so that the thickness or height of the sound module 400 can be effectively ensured to be uniform.

In one embodiment, the module housing 300 is provided with a mounting hole 370 corresponding to the magnetic conductive yoke 11, and at least a portion of the magnetic conductive yoke 11 is located in the mounting hole 370 to seal the mounting hole 370.

It will be appreciated that, as shown in fig. 13 to 16, by providing the mounting hole 370 in the module case 300 such that at least part of the magnetic yoke 11 is positioned in the mounting hole 370 to seal the mounting hole 370, the thickness or height of the sound emitting module 400 can be effectively reduced. Alternatively, the side of the magnetic yoke 11 facing away from the diaphragm 21 is flush with the outer surface of the module housing 300. Such an arrangement can effectively ensure the consistency of the thickness or height of the sounding module 400.

It should be noted that, by arranging the fixing hole 360 and the mounting hole 370 on two opposite sides of the module housing 300, the top plate 1231 of the cover 123 of the first magnetic circuit portion 12 of the sounding unit 100 is exposed to the fixing hole 360 and is flush with the outer surface of the module housing 300, and the magnetic yoke 11 is exposed to the mounting hole 370 and is flush with the outer surface of the module housing 300, so that the height dimension of the sounding module 400 is equivalent to or consistent with the height dimension of the sounding unit 100, and thus the thin design of the sounding module 400 can be effectively realized.

In the present embodiment, the magnetic conductive yoke 11 of the sound generating unit 100 is provided with a leakage hole 1142. It can be appreciated that when the sounding body 100 is disposed in the mounting cavity 310, the leakage hole 1142 of the sounding body 100 communicates with the mounting cavity 310 and the receiving cavity 113. It can be appreciated that a rear sound cavity 330 isolated from the front sound 320 is also formed between the sound generating unit 100 and the module housing, and the leakage hole 1142 of the sound generating unit 100 communicates with the rear sound cavity 330.

In order to further improve the sound emitting effect of the sound emitting module 400, the rear sound cavity 330 of the sound emitting module 400 is filled with sound absorbing particles. In order to avoid sound absorbing particles entering the sound emitting unit 100 through the leakage holes 1142, the sound emitting unit 100 is further affected. It will be appreciated that the sounding module 400 may further include an insulating mesh and a metal mesh disposed in the rear sound chamber 330, such that the insulating mesh and the metal mesh cover the leakage holes 1142 of the sounding cell 100.

In this embodiment, as shown in fig. 14, the module housing 300 is further provided with a damping hole communicated with the rear acoustic cavity 330, and a damping member for blocking the damping hole is disposed at the damping hole, so that the sound absorbing particles can be conveniently filled into the rear acoustic cavity 330 from the damping hole, which is not limited herein.

The invention also provides electronic equipment, which comprises the sounding monomer 100. The specific structure of the sounding unit 100 refers to the foregoing embodiments, and because the electronic device adopts all the technical solutions of all the foregoing embodiments, the electronic device at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which are not described in detail herein.

In this embodiment, the electronic device further includes a device housing and a flexible circuit board, and the sounding unit 100 and the flexible circuit board are both disposed in the device housing. It is understood that the electronic device may be an earphone, a mobile phone, a computer, a tablet computer, a smart wearable device, etc., and is not limited herein.

The invention also provides electronic equipment, which comprises the sounding module 400. The specific structure of the sounding module 400 refers to the foregoing embodiments, and because the electronic device adopts all the technical solutions of all the foregoing embodiments, the sounding module at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which are not described in detail herein.

It is understood that the electronic device may be an earphone, a mobile phone, a computer, a tablet computer, a smart wearable device, etc., and is not limited herein. In this embodiment, the electronic device further includes a device housing, and the sound generating module 400 is disposed in the device housing.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all equivalent structural modifications made by the present description and accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. A sound producing monomer, characterized in that the sound producing monomer comprises:

2. The sounding monomer of claim 1, wherein the centering support comprises an outer fixing portion, an inner fixing portion located inside the outer fixing portion, and a spring arm portion connecting the outer fixing portion and the inner fixing portion, the outer fixing portion is disposed in a ring shape, the outer fixing portion surrounds the two magnetic circuit assemblies and is partially sandwiched between the fixing portion and the magnetic yoke, the inner fixing portion is sandwiched between the central portion and the skeleton, and the spring arm portion extends along an arrangement direction of the two first magnetic circuit portions.

3. The sounding monomer of claim 2, wherein the inner fixing part is square ring-shaped, the inner fixing part has four corners, each corner is provided with a bonding pad, the framework comprises four, each first voice coil is positioned between two frameworks, one end of each framework is connected with the bonding pad, the other end of the framework is connected with the first voice coil and is electrically connected with leads of the first voice coils, so that the two first voice coils are connected in series through the centering support piece and the framework;

4. The sound generating unit according to claim 1, wherein the magnetic yoke comprises a bottom wall and a side wall which are arranged at an included angle, and the side wall and the bottom wall enclose a containing cavity;

5. The sound-producing monomer of claim 4, wherein the bottom wall and the side wall are of an integrally formed structure;

And/or the side wall is arranged around the periphery of the bottom wall;

and/or the side wall and the bottom wall are arranged vertically;

and/or the side plate and the bottom wall are of an integrated structure;

and/or the side plates are arranged vertically to the bottom wall;

6. The sound-producing unit as claimed in claim 4, wherein a through hole is formed in the bottom wall adjacent to each side plate, each side plate is formed by bending a side of the bottom wall adjacent to the through hole toward the inside of the cavity, and the sound-producing unit further comprises a cover plate, and the cover plate covers the through hole.

7. The sound-producing unit as claimed in claim 1, wherein the sound-producing unit comprises a housing for accommodating and fixing the vibration system and the magnetic circuit system, the housing comprising a bottom plate and a side wall plate, the side wall plate and the bottom plate enclosing to form an installation space;

8. The sound generating unit according to claim 1, wherein the magnetic circuit system further comprises a central magnetic circuit, the central magnetic circuit is arranged in the accommodating space, is opposite to the vibrating diaphragm in the vibrating direction of the vibrating diaphragm and is arranged at intervals, and the top surface of the central magnetic circuit is lower than the top surfaces of the two first magnetic circuit parts;

9. The sound-producing cell of claim 8, wherein the central magnetic circuit is provided to the magnetic yoke, the central magnetic circuit includes a central magnet and a central magnetically permeable plate that are stacked, and the central magnet is sandwiched between the magnetic yoke and the central magnetically permeable plate; the magnetic yoke and/or the central magnetic conduction plate are/is provided with an opening, the central magnet is provided with a protruding part corresponding to the opening, and the protruding part is limited in the opening;

10. The sound producing cell of any one of claims 1 to 9, wherein each of the magnetic circuit assemblies comprises:

11. The sound generating unit according to any one of claims 1 to 9, wherein each of the first magnetic circuit portions further comprises a cover body, each of the cover bodies covers one of the magnetic circuit assemblies and is connected to the magnetic conductive yoke, and a peripheral edge of the cover body extends toward one side of the diaphragm to form an extension portion, and the extension portion is connected to the diaphragm.

12. The sound-producing unit according to any one of claims 1 to 9, wherein an acoustic path is formed between a top surface of an edge of the diaphragm extending in an arrangement direction of the two first magnetic circuit portions and the two first magnetic circuit portions.

13. A sound module comprising a module housing and a sound unit according to any one of claims 1 to 12, wherein the sound unit is provided in the module housing.