CN113099363B

CN113099363B - Sound producing device

Info

Publication number: CN113099363B
Application number: CN202110353563.9A
Authority: CN
Inventors: 蔡晓东; 李波波; 刘松
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2022-11-22
Anticipated expiration: 2041-03-31
Also published as: CN113099363A; WO2022206046A1

Abstract

The invention discloses a sound production device which comprises a shell, a magnetic circuit system, a first vibration system and a second vibration system, wherein the magnetic circuit system comprises a central magnetic circuit structure and a side magnetic circuit structure fixed on the shell, the central magnetic circuit structure comprises a central magnet and two central magnetic conduction plates, each central magnetic conduction plate comprises a first magnetic conduction part corresponding to the central magnet, at least one central magnetic conduction plate comprises a connecting part connected to the edge of the first magnetic conduction part, the connecting part is connected with the shell or the side magnetic circuit structure, and a magnetic gap is formed between the central magnet and the central magnetic conduction plate as well as between the side magnet and the side magnetic conduction plate. The first vibration system comprises a first vibrating diaphragm and an annular voice coil arranged on the first vibrating diaphragm. The second vibration system comprises a second vibrating diaphragm and a flat voice coil arranged on the second vibrating diaphragm, the second vibrating diaphragm is located on one side, away from the first vibrating diaphragm, of the magnetic circuit system, and the flat voice coil and the connecting portion are distributed at the circumferential interval of the central magnet. According to the technical scheme, the double-sided sound production can be realized, and meanwhile, the vibration space of the voice coil in the magnetic gap is enlarged.

Description

Sound producing device

Technical Field

The invention relates to the technical field of sound-electricity conversion, in particular to a sound production device.

Background

In the conventional dual-sided sound generating device, a central magnetic conductive plate is usually used to support the central magnetic circuit assembly, that is, a central magnet is respectively disposed at two opposite sides of the central magnetic conductive plate, a magnetic gap is formed at the periphery of each central magnet, and the voice coils at two sides respectively extend into the two magnetic gaps. However, when the central magnetic conductive plate is arranged in this way, the central magnetic conductive plate can occupy the size (thickness) of the sound generating device in the depth direction of the magnetic gap, and when the thickness of the sound generating device needs to be reduced, the thickness of the central magnet can be reduced, so that the depth of the magnetic gap is reduced, the vibration space of the voice coil is reduced, and the acoustic performance is seriously influenced.

Disclosure of Invention

The invention mainly aims to provide a sound production device, which aims to increase the vibration space of a voice coil in a magnetic gap while realizing double-sided sound production.

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

a housing;

the magnetic circuit system comprises a central magnetic circuit structure and an edge magnetic circuit structure, the central magnetic circuit structure comprises a central magnet and two central magnetic conduction plates which are respectively arranged at the upper side and the lower side of the central magnet, each central magnetic conduction plate comprises a first magnetic conduction part corresponding to the central magnet, at least one central magnetic conduction plate comprises a connecting part which extends outwards from the edge of the first magnetic conduction part, and the connecting part is connected with the shell or the edge magnetic circuit structure; the side magnetic circuit structure is fixed on the shell and comprises a plurality of side magnets arranged around the central magnet and side magnetic conductive plates arranged on the upper side and the lower side of each side magnet; magnetic gaps are formed between the central magnet and the central magnetic conduction plate and between the side magnets and the side magnetic conduction plates;

the first vibration system comprises a first vibrating diaphragm and an annular voice coil arranged on the first vibrating diaphragm, the first vibrating diaphragm is arranged on the shell, and the annular voice coil extends into the magnetic gap; and the number of the first and second groups,

and the second vibration system comprises a second vibrating diaphragm and a flat voice coil, the second vibrating diaphragm is arranged in the shell and is positioned on one side of the magnetic circuit deviating from the first vibrating diaphragm, the flat voice coil is arranged on one side of the second vibrating diaphragm facing the first vibrating diaphragm and extends into the magnetic gap, and the flat voice coil and the connecting part are distributed at intervals in the circumferential direction of the central magnet.

Optionally, the two central magnetic conductive plates include a first central magnetic conductive plate and a second central magnetic conductive plate, and the first central magnetic conductive plate includes two connecting portions respectively disposed on two opposite sides of the first magnetic conductive portion of the first central magnetic conductive plate.

Optionally, the first central magnetic conductive plate is located on one side of the central magnet close to the second diaphragm; the side magnetic conduction plates comprise a first side magnetic conduction plate corresponding to the first central magnetic conduction plate and a second side magnetic conduction plate corresponding to the second central magnetic conduction plate; the two connecting parts are connected with the corresponding first side magnetic conduction plates.

Optionally, the first central magnetic conductive plate is disposed on one side of the central magnet close to the first vibrating diaphragm, and each of the two connecting portions includes a first connecting section and a second connecting section, the first connecting section is connected to an edge of the first magnetic conductive portion and extends toward the second vibrating diaphragm, and the second connecting section is connected to one side of the first connecting section away from the first magnetic conductive portion and extends toward a lateral side of the central magnet; the side magnet corresponding to the two connecting parts comprises an upper part and a lower part, and the two connecting parts are positioned between the upper part and the lower part; the part of the annular voice coil extending into the magnetic gap is positioned on one side of the first connecting section, which is far away from the other central magnet.

Optionally, the magnetic gap includes two first gaps and two second gaps, the two first gaps and the two second gaps are sequentially and alternately distributed along the circumferential direction of the central magnet, the flat voice coil extends into the first gaps, and the connecting portion is disposed at the junction of the first gaps and the second gaps.

Optionally, each of the two central magnetic conductive plates includes the first magnetic conductive portion and the connecting portion, the central magnet is disposed between the two first magnetic conductive portions, and each connecting portion is disposed at a junction of the first gap and the second gap; two the connecting portion of center magnetic conduction board sets up relatively, and two the connecting portion of center magnetic conduction board are the form of buckling towards each other to interconnect.

Optionally, the edge magnetic conduction plate includes an annular connection portion and an edge magnetic conduction portion, the annular connection portion is connected to the housing, the edge magnetic conduction portion is connected to the inner side of the annular connection portion, and the edge magnet faces the surfaces of the first diaphragm and the second diaphragm and is provided with the edge magnetic conduction portion.

Optionally, the second vibration system further includes a connection bracket, and the connection bracket connects the second diaphragm and the flat voice coil.

Optionally, the connecting bracket includes a first fixing portion and two second fixing portions partially disposed at two ends of the first fixing portion, the first fixing portion is connected to the second diaphragm, and the second fixing portion extends in a direction away from the second diaphragm; the second vibration system comprises two connecting brackets and two flat voice coils; one end of one of the flat voice coils is connected with one second fixing part of one of the connecting supports, and the other end of the flat voice coil is connected with one second fixing part of the other connecting support; and two ends of the other flat voice coil are respectively connected with the other second fixing parts of the two connecting brackets.

Optionally, the first vibration system further includes a first stiffener, and the first stiffener elastically connects the annular voice coil and the housing; and/or, the second vibration system further comprises a second centering disk, and the second centering disk is elastically connected with the flat voice coil and the shell.

According to the technical scheme, the first vibration system and the second vibration system are respectively arranged on two sides of the magnetic circuit system, the annular voice coil of the first vibration system and the flat voice coil of the second vibration system can extend into the magnetic gap of the magnetic circuit system, and after the annular voice coil of the first vibration system and the flat voice coil of the second vibration system are electrified, the first vibration system and the second vibration system can vibrate and sound, so that the double-sided sound production of the sound production device is realized. Meanwhile, in the magnetic circuit system, the central magnet is arranged on the first magnetic conduction part of the central magnetic conduction plate, and the connecting part of the central magnetic conduction plate extends outwards from the edge of the central magnet, so that the connecting part is connected with the side magnetic circuit structure or the connecting shell, and then the flat voice coils and the connecting part are distributed at intervals in the circumferential direction of the central magnet. So can realize the fixed of central magnet through connecting portion and casing or with being connected of limit magnetic structure, when also having avoided having connecting portion between flat voice coil loudspeaker voice coil and the annular voice coil loudspeaker voice coil, connecting portion occupy the condition in the space of degree of depth direction (vibration direction promptly) in the magnetic gap to at least, can increase the size that flat voice coil loudspeaker voice coil stretched into the magnetic gap, and then increase the vibration space of flat voice coil loudspeaker voice coil on the magnetic gap degree of depth direction, can promote sound generating mechanism's acoustic performance.

Drawings

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

FIG. 1 is an exploded view of an embodiment of the sound generator of the present invention;

FIG. 2 is a sectional view of the assembled sound generator of FIG. 1;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is an exploded view of the magnetic circuit system of FIG. 1;

FIG. 5 is a schematic structural view of the central magnetic conductive plate of FIG. 4;

FIG. 6 is an exploded view of another embodiment of the sound generator of the present invention;

FIG. 7 is an exploded view of the magnetic circuit system of FIG. 6;

figure 8 is an exploded view of a further embodiment of the sound generating device of the present invention;

fig. 9 is an exploded view of the magnetic circuit system of fig. 8;

fig. 10 is a cross-sectional view of the magnetic circuit system in fig. 8;

fig. 11 is a schematic structural diagram of a side flux plate of the magnetic circuit system in fig. 8;

FIG. 12 is a schematic view of the housing of FIG. 1;

FIG. 13 is a schematic view of the flat voice coil, the connecting bracket and the second spider of FIG. 1;

fig. 14 is a schematic structural view of the connecting bracket of fig. 13.

The reference numbers illustrate:

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

Detailed Description

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

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

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

The invention provides a sound production device which is used for electronic equipment, wherein the electronic equipment can be a mobile phone, a tablet personal computer, a computer or wearable equipment such as a watch.

In an embodiment of the present invention, please refer to fig. 1 to 5 in combination, or refer to fig. 6 and 7 in combination, or refer to fig. 8 and 9 in combination, the sound generating device includes a housing 10, a magnetic circuit system 20, a first vibration system 30, and a second vibration system 40, where the magnetic circuit system 20 includes a central magnetic circuit structure and a side magnetic circuit structure, and the central magnetic circuit structure includes a central magnet 22 and two central magnetic conductive plates 24 respectively disposed on upper and lower sides of the central magnet 22. Each central magnetic conductive plate 24 includes a first magnetic conductive portion 241 corresponding to the central magnet 22, and at least one central magnetic conductive plate 24 includes a connecting portion 243 extending from an edge of the first magnetic conductive portion 241 to the outside, and the connecting portion 243 is connected to the housing 10 or the side magnetic circuit structure. The side magnetic circuit structure is fixed on the shell 10 and comprises a plurality of side magnets 23 arranged around the central magnet 22 and side magnetic conductive plates 26 arranged on the upper side and the lower side of the side magnets 23; magnetic gap 21 is formed between center magnet 22 and center plate 24 and edge magnet 23 and edge plate 26.

The first vibration system 30 includes a first diaphragm 31 and an annular voice coil 32 disposed on the first diaphragm 31, the first diaphragm 31 is mounted on the housing 10, and the annular voice coil 32 extends into the magnetic gap 21. The second vibration system 40 includes a second diaphragm 41 and a flat voice coil 42, the second diaphragm 41 is mounted on the casing 10 and located on a side of the magnetic circuit system 20 away from the first diaphragm 31, the flat voice coil 42 is disposed on a side of the second diaphragm 41 facing the first diaphragm 31 and extends into the magnetic gap 21, and the flat voice coil 42 and the connecting portion 243 are circumferentially spaced apart from each other on the central magnet 22.

In this embodiment, the casing 10 is provided with openings at two ends, the first diaphragm 31 is installed at an opening at one end of the casing 10, the second diaphragm 41 is installed at an opening at the other end of the casing 10, the annular voice coil 32 is installed at one side of the first diaphragm 31 facing the second diaphragm 41, the flat voice coil 42 is installed at one side of the second diaphragm 41 facing the first diaphragm 31, and the arrangement directions of the first diaphragm 31 and the second diaphragm 41 are the vibration directions of the first diaphragm 31 and the second diaphragm 41. The central magnet 22 is disposed between the first diaphragm 31 and the second diaphragm 41, and the annular voice coil 32 at least partially extends into the magnetic gap 21, which corresponds to the central magnet 22 partially disposed inside the annular voice coil 32. Flat voice coil 42 has two wire sections along the direction of arranging of first vibrating diaphragm 31 and second vibrating diaphragm 41 interval distribution, and the wire section that flat voice coil 42 kept away from second vibrating diaphragm 41 stretches into magnetic gap 21, and flat voice coil 42 is close to the wire section of second vibrating diaphragm 41 and is located outside magnetic gap 21. That is, it is equivalent to the flat voice coil 42 and the annular voice coil 32 extending into the magnetic gap 21 from the two opposite sides of the central magnet 22, and the flat voice coil 42 and the annular voice coil 32 are spaced in the depth direction of the magnetic gap 21, and the flat voice coil 42 and the annular voice coil 32 do not interfere with each other when vibrating simultaneously. When the flat voice coil 42 and the connecting portion 243 are spaced apart in the circumferential direction of the center magnet 22, that is, the orthographic projections of the flat voice coil 42 and the connecting portion 243 on the second diaphragm 41 are spaced apart in the circumferential direction of the diaphragm. The first vibration system 30 and the second vibration system 40 may vibrate independently or simultaneously. Electrical signals may be input to the flat voice coil 42 and the annular voice coil 32, respectively.

According to the technical scheme of the invention, the first vibration system 30 and the second vibration system 40 are respectively arranged on two sides of the magnetic circuit system 20, the annular voice coil 32 of the first vibration system 30 and the flat voice coil 42 of the second vibration system 40 can extend into the magnetic gap 21 of the magnetic circuit system 20, and after the annular voice coil 32 of the first vibration system 30 and the flat voice coil 42 of the second vibration system 40 are electrified, the first vibration system 30 and the second vibration system 40 can vibrate and sound, so that the double-sided sound production of the sound production device is realized. Meanwhile, in the magnetic circuit system 20, the central magnet 22 is disposed on the first magnetic conductive portion 241 of the central magnetic conductive plate 24, and the connecting portion 243 of the central magnetic conductive plate 24 extends outward from the edge of the central magnet 22, so that the connecting portion 243 is connected to the side magnetic circuit structure or the housing 10, and the flat voice coil 42 and the connecting portion 243 are spaced apart from each other in the circumferential direction of the central magnet 22. Thus, the center magnet 22 can be fixed by the connection between the connection portion 243 and the casing 10 or the side magnetic circuit structure, and the situation that the connection portion 243 occupies the space of the magnetic gap 21 in the depth direction (i.e., the vibration direction) when the connection portion 243 exists between the flat voice coil 42 and the annular voice coil 32 is also avoided, i.e., the situation that the connection portion 243 and the flat voice coil 42 share the space in the depth direction of the magnetic gap 21 is avoided, so that the vibration space of the flat voice coil 42 in the magnetic gap 21 can be increased, the vibration effect of the vibration system is improved, and the acoustic performance of the sound generating device can be improved.

In an embodiment, the second vibration system 40 includes two flat voice coils 42, the two flat voice coils 42 are respectively disposed on two opposite sides of the central magnet 22, and the two flat voice coils 42 are both disposed on the second diaphragm 41 and both can extend into the magnetic gap 21, so that it can be ensured that the second diaphragm 41 is uniformly stressed during vibration, the possibility of polarization of the second vibration system 40 is reduced, and the sound-producing performance of the second vibration system 40 is improved. Of course, in other embodiments, the second vibration system 40 may include only one flat voice coil 42 or three, four or more flat voice coils 42.

Referring to fig. 1 and 4, or fig. 6 and 7, in an embodiment, the two central magnetic conductive plates 24 include a first central magnetic conductive plate 240 and a second central magnetic conductive plate 242, and the first central magnetic conductive plate 240 includes two connecting portions 243 respectively disposed on two opposite sides of the first magnetic conductive portion 241 of the first central magnetic conductive plate 240. That is, the two central flux plates 24 are a first central flux plate 240 and a second central flux plate 242, respectively, and the central magnet 22 is disposed between the first central flux plate 240 and the second central flux plate 242. First center magnetic conduction plate 240 can be connected with casing 10 (limit magnetic structure) through connecting portion 243 of the double-phase offside of first magnetic conduction portion 241, has both increased the connection area of first center magnetic conduction plate 240 with casing 10 (limit magnetic structure), also makes the double-phase offside atress of first magnetic conduction portion 241 even to can promote the stability of first center magnetic conduction plate 240, guarantee that whole magnetic circuit 20 remains stable in the vibration process. In this embodiment, the first central magnetic conductive plate 240 may be disposed on a side of the central magnet 22 facing the second diaphragm 41, or on a side of the central magnet 22 facing the first diaphragm 31. Of course, in other embodiments, the connection portion 243 may be only connected to one side of the first magnetic conduction portion 241.

Referring to fig. 6 and fig. 7, in an embodiment, the first central magnetic conductive plate 240 is located on a side of the central magnet 22 close to the second diaphragm 41, the side magnetic conductive plate 26 includes a first side magnetic conductive plate 260 corresponding to the first central magnetic conductive plate 240 and a second side magnetic conductive plate 263 corresponding to the second central magnetic conductive plate 242, and the two connecting portions 243 are connected to the corresponding first side magnetic conductive plate 260. That is, the edge magnetic conductive plates 26 on the upper and lower sides of the edge magnet 23 are the first edge magnetic conductive plate 260 and the second edge magnetic conductive plate 263, respectively, the first edge magnetic conductive plate 260 is disposed corresponding to the first center magnetic conductive plate 240, and the second edge magnetic conductive plate 263 is disposed corresponding to the second center magnetic conductive plate 242. By connecting the two connecting portions 243 to the corresponding first side magnetic conductive plates 240, the first side magnetic conductive plate 260 and the first central magnetic conductive plate 240 can be connected as a whole, that is, when the first side magnetic conductive plate 260 is fixed to the casing 10, the first central magnetic conductive plate 240 can be fixed to the casing 10 through the first side magnetic conductive plate 260. Therefore, when the magnetic circuit system 20 is installed, the first central magnetic conduction plate 240 does not need to be additionally connected with the shell 10, which is beneficial to simplifying the installation process and improving the production efficiency.

The first central magnetic-conductive plate 240 is disposed on a side of the central magnet 22 close to the second diaphragm 41, so that the connecting portion 243 may also be disposed on a side of the central magnet 22 close to the second diaphragm 41, for example, the first central magnetic-conductive plate 240 is in a flat plate shape. In this way, the connection portion 243 is located outside the central magnet 22, so that the situation that the connection portion 243 occupies the space of the magnetic gap 21 in the vibration direction is avoided, the space of the magnetic gap 21 in the vibration direction can be fully utilized by the annular voice coil 32 and the flat voice coil 42, the vibration space of the annular voice coil 32 and the flat voice coil 42 in the depth direction of the magnetic gap 21 can be increased under the condition that the thickness of the central magnet 22 is not increased, and the acoustic performance of the sound generating device is improved. In addition, the connecting portion 243 can be prevented from occupying the space in the width direction of the magnetic gap 21, which is advantageous for reducing the width or length of the sound generating device.

The first magnetic conductive portion 241, the connecting portion 243, and the first side magnetic conductive plate 260 may be integrally formed, so that the first center magnetic conductive plate 240 and the first side magnetic conductive plate 260 are conveniently manufactured and formed, and the connecting processes of the first center magnetic conductive plate 240 and the first side magnetic conductive plate 260 are reduced. Of course, the first magnetic conductive portion 241 and the connecting portion 143, and the connecting portion 243 and the first side magnetic conductive plate 260 may be welded to each other.

In addition, unlike the embodiment in which the first central magnetic conductive plate 240 is disposed on the side of the central magnet 22 close to the second diaphragm 41, with reference to fig. 1 to 5, in another embodiment, the first central magnetic conductive plate 240 is disposed on the side of the central magnet 22 close to the first diaphragm 31. Each of the two connecting portions 243 includes a first connecting section 244 and a second connecting section 245, and the first connecting section 244 is connected to an edge of the first magnetic conductive portion 241 and extends toward the second diaphragm 41. The second connecting section 245 is connected to a side of the first connecting section 244 away from the first magnetic conductive part 241 and extends towards a lateral direction of the central magnet 22, and the side magnet 23 corresponding to the two connecting parts 243 includes an upper part and a lower part, and the two connecting parts 243 are located between the upper part and the lower part. The portion of the annular voice coil 32 that protrudes into the magnetic gap 21 is located on the side of the first connecting section 244 facing away from the other central magnet 22. I.e. corresponding to the central magnet 22, is arranged between the two first connecting segments 244, while the two second connecting segments 245 extend away from each other and are respectively connected to the housing 10. The contact area between the central magnet 22 and the first central magnetic conduction plate 240 is increased, and the connection stability of the central magnet 22 can be improved. But also can avoid the annular voice coil 32, so as to provide an avoiding space for the annular voice coil 32 to extend into the magnetic gap 21, and the size of the annular voice coil 32 extending into the magnetic gap 21 is larger.

Referring to fig. 8 and 9 in an embodiment, the magnetic gap 21 includes two first gaps 211 and two second gaps 212, the two first gaps 211 and the two second gaps 212 are alternately arranged along the circumferential direction of the central magnet 22, the flat voice coil 42 extends into the first gaps 211, and the connecting portion 243 is disposed at the intersection of the first gaps 211 and the second gaps 212. The sound generating device may be directional or circular, that is, the central magnet 22 may be square or circular, or the central magnet 22 may be three-deformed, pentagonal, hexagonal or octagonal, etc. When the central magnet 22 is substantially square, the magnetic gaps 21 are formed at the corners of the central magnet 22 corresponding to the connecting portions 243, so that the number of the flat voice coils 42 can be conveniently set according to requirements, for example, the flat voice coils 42 can be formed in the two first gaps 211 and the two second gaps 212, so that the number of the flat voice coils 42 can be conveniently increased, and the situation that the connecting portions 243 occupy the space of the magnetic gaps 21 in the depth direction (i.e., the vibration direction) when the connecting portions 243 exist between the flat voice coils 42 and the annular voice coil 32 can be avoided. In this embodiment, the central magnetic conductive plate 24 may be disposed on a side of the central magnet 22 away from the first diaphragm 31, or on a side of the central magnet 22 facing the first diaphragm 31.

In one embodiment, each of the two central magnetic conductive plates 24 includes a first magnetic conductive portion 241 and a connecting portion 243, the central magnet 22 is disposed between the two first magnetic conductive portions 241, and each connecting portion 243 is disposed at the intersection of the first gap 211 and the second gap 212. Specifically, two central magnetic conductive plates 24 are both connected to the housing 10, and thus, two opposite sides of the central magnet 22 are respectively provided with one central magnetic conductive plate 24 for supporting, so as to improve the stability of the magnetic circuit system 20.

Referring to fig. 9 and 10, in an embodiment, the connecting portions 243 of the two central magnetic conductive plates 24 are disposed opposite to each other, and the connecting portions 243 of the two central magnetic conductive plates 24 are bent toward each other and connected to each other. That is, the connecting portion 243 of the center magnetic-conductive plate 24 is bent toward the other center magnetic-conductive plate 24 to connect with the connecting portion 243 of the other center magnetic-conductive plate 24, so as to increase the stability of the center magnet 22 between the two center magnetic-conductive plates 24. Of course, in other embodiments, the connecting portion 243 may also be straight, that is, the connecting portion 243 is not bent.

Referring to fig. 1 and 4 in combination, or referring to fig. 6 and 7 in combination, or referring to fig. 8, 9 and 11 in combination, in an embodiment, the edge magnetic conductive plate 26 includes an annular connecting portion 261 and an edge magnetic conductive portion 262, the annular connecting portion 261 is connected to the casing 10, the edge magnetic conductive portion 262 is connected to an inner side of the annular connecting portion 261, and the surfaces of the edge magnet 23 facing the first diaphragm 31 and the second diaphragm 41 are both provided with the edge magnetic conductive portion 262. That is, a plurality of side magnetic conductive portions 262 may be provided inside the annular connecting portion 261, and the number of side magnetic conductive portions 262 may be set according to the number of side magnets 23, for example, one side magnetic conductive portion 262 may be provided for each side magnet 23. Make annular connecting portion 261 and limit magnetic conduction portion 262 integrated into one piece, compare in the mode that sets up a plurality of independent limit magnetic conduction boards 26, so can make limit magnetic conduction portion 262 and annular connecting portion 261 be connected as an organic wholely, can reduce sound generating mechanism's spare part quantity to be favorable to reducing the assembly process, improve production efficiency. And the outer periphery of the annular connecting part 261 is connected with the shell 10, so that the connection stability of the edge magnetic conduction plate 26 can be improved.

Referring to fig. 12, in an embodiment, the side magnetic conductive plate 26 is integrally injection molded with the casing 10, so that the structural strength of the casing 10 can be improved through the side magnetic conductive plate 26, the connection stability between the casing 10 and the magnetic circuit system 20 can be improved, the number of parts of the sound generating apparatus during the assembly process can be reduced, and the assembly process can be reduced. Of course, in other embodiments, the casing 10 and the edge magnetic plate 26 may be adhered or fixed together by a screw or the like.

Referring to fig. 1, fig. 3 and fig. 12, in an embodiment, the housing 10 includes two connecting shells 11, the two ends of the connecting shells 11 are open, and the open ends of the two connecting shells 11 are connected. That is, the two connecting shells 11 are separately arranged, and during assembly, the open ends of the two connecting shells 11 are connected, so that during assembly, the magnetic circuit system 20 can be partially mounted on the connecting shells 11, and then the two connecting shells 11 are connected, thereby facilitating the assembly of the housing 10 and the magnetic circuit system 20. Of course, in other embodiments, the housing 10 may be a unitary structure.

In an embodiment, the edge magnetic conductive plate 26 (annular connection portion) is integrally formed with the connection shell 11, for example, the edge magnetic conductive plate 26 is integrally injection-molded with the connection shell 11 as an insert, so that the structural strength of the casing 10 can be improved by the central magnetic conductive plate 24, the connection stability between the casing 10 and the central magnetic conductive plate 24 can be improved, the number of parts of the sound generating apparatus in the assembling process can be reduced, and the assembling process can be reduced.

In an embodiment, the central magnetic conductive plate 24 (the connecting portion) and the connecting shell 11 are integrally injection-molded, for example, the central magnetic conductive plate 24 is integrally injection-molded with the connecting shell 11 as an insert, which is beneficial to reducing the number of parts in the assembling process and reducing the assembling procedures. In one embodiment, the central magnetic conductive plate 24 (connecting portion) is sandwiched between the two connecting shells 11.

In one embodiment, the two central magnetic conductive plates 24 (the edge magnetic conductive plates 26) are integrally formed with the two connecting shells 11 in a one-to-one correspondence, or the connecting portions 243 of the two central magnetic conductive plates 24 are sandwiched between the two connecting shells 11. Therefore, the number of parts in the assembling process is reduced, and the assembling procedures are reduced.

In one embodiment, a pressure relief hole 12 is formed at the joint of the two connecting shells 11, and the pressure relief hole 12 is communicated with the inner cavity of the shell 10. Wherein, pressure release hole 12 can locate one of them connecting shell 11, perhaps two connecting shell 11 interconnect's one end all is equipped with the breach, and two breachs form pressure release hole 12. Therefore, the pressure relief hole 12 is formed at the joint of the two connecting shells 11, and the forming is convenient.

Referring to fig. 1, 13 and 14, in an embodiment, the second vibration system 40 further includes a connecting bracket 43, and the connecting bracket 43 connects the second diaphragm 41 and the flat voice coil 42. Specifically, the second diaphragm 41 includes a central portion, a ring-folded portion surrounding an outer edge of the central portion, and an edge portion surrounding an outer edge of the ring-folded portion, wherein the ring-folded portion and the edge portion are both ring-shaped. The connecting bracket 43 is connected to the side of the second diaphragm 41 facing the central magnet 22, that is, the connecting bracket 43 is connected to the side of the central portion facing the central magnet 22, and the flat voice coil 42 is connected to the side of the connecting bracket 43 away from the second diaphragm 41, so that the fixed connection of the flat voice coil 42 can be facilitated, and the stability of the flat voice coil 42 can be improved. Of course, in other embodiments, the wire segments of the flat voice coil 42 can be ensured to extend into the magnetic gap 21 by increasing the size of the flat voice coil 42.

The structure of the connecting support 43 has various structures, for example, in an embodiment, the second vibration system 40 includes two connecting supports 43 and two flat voice coils 42, each connecting support 43 includes a first fixing portion 431 and two second fixing portions 432 respectively disposed at two ends of the first fixing portion 431, the first fixing portion 431 is connected to the second diaphragm 41, and the second fixing portions 432 extend in a direction away from the second diaphragm 41. One end of one of the flat voice coils 42 is connected to one of the second fixing portions 432 of one of the connection brackets 43, and the other end of the flat voice coil 42 is connected to one of the second fixing portions 432 of the other connection bracket 43. The other second fixing portions 432 of the two connection brackets 43 are connected to both ends of the other flat voice coil 42, respectively.

Specifically, the two flat voice coils 42 are disposed opposite to each other, the two connecting brackets 43 are disposed opposite to each other, and the two flat voice coils 42 and the two connecting brackets 43 are sequentially and alternately distributed along the circumferential direction of the second diaphragm 41. Two ends of one of the flat voice coils 42 are respectively connected with one of the second fixing portions 432 of the two connecting brackets 43, and two ends of the other flat voice coil 42 are respectively connected with the other second fixing portion 432 of the two connecting brackets 43, so that the two connecting brackets 43 and the two flat voice coils 42 are connected in a frame shape. With this arrangement, as two connection brackets 43 and two flat voice coils 42 are connected together, the connection stability between the connection brackets 43 and the flat voice coils 42 is increased, and the stability between the two flat voice coils 42 is also increased, so that the possibility of polarization of the flat voice coils 42 when the second vibration system 40 vibrates can be reduced. Of course, in other embodiments, only one connection bracket 43 may be connected to only one flat voice coil 42, or only one connection bracket 43 may be provided, and two flat voice coils 42 may be connected to the connection bracket 43.

In an embodiment, the first vibration system 30 further includes a first centering pad 33, the first centering pad 33 connects the annular voice coil 32 and the casing 10, and the first centering pad 33 elastically connects the annular voice coil 32 and the casing 10, so that the offset motion of the annular voice coil 32 towards the direction perpendicular to the vibration direction can be reduced, thereby effectively reducing the polarization phenomenon of the voice coil and improving the listening yield of the sound generating apparatus. In one embodiment, the first centering support 33 includes a first fixing section, a first elastic section and a first support section, the two ends of the first elastic section are respectively connected to the first fixing section and the first support section, the first fixing section is connected to the casing 10, and the first support section is connected to the annular voice coil 32. In an embodiment, the first fixing section is installed at a notch of the connecting shell 11 for forming the pressure relief hole 12, so that a yielding position can be provided for installing the first centering branch piece 33, the pressure relief hole 12 can be conveniently formed, and a pressure relief function is realized.

In one embodiment, the second vibration system 40 further comprises a second spider 44, the second spider 44 connecting the flat voice coil 42 and the housing 10. Through the arrangement of the second centering disk 44 to elastically connect the flat voice coil 42 and the housing 10, the offset movement of the flat voice coil 42 towards the direction perpendicular to the vibration direction can be reduced, so that the polarization phenomenon of the voice coil is effectively reduced, and the listening yield of the sound generating device is improved. In one embodiment, the second centering branch 44 includes a second fixing section 443, a second elastic section 442 and a second supporting section 441, two ends of the second elastic section 442 are respectively connected to the second fixing section 443 and the second supporting section 441, the second fixing section 443 is connected to the casing 10, and the second supporting section 441 is connected to the flat voice coil 42. The second support section 441 may be directly connected to the flat voice coil 42, may be connected to a portion (the second fixing portion 432) of the connection holder 43 to which the flat voice coil 42 is connected, or may be connected to both the flat voice coil 42 and the portion (the second fixing portion 432) of the connection holder 43 to which the flat voice coil 42 is connected. In an embodiment, the second fixing section 443 is installed at the notch of the connecting shell 11 for forming the pressure relief hole 12, so that the second centering branch 44 can be abducted, the pressure relief hole 12 can be conveniently formed, and the pressure relief function is realized.

In one embodiment, the second fixing portion 432 includes a first connecting plate 433 and a second connecting plate 434, the first connecting plate 433 connects the first fixing portion 431 and extends in a direction away from the second diaphragm 41, the second connecting plate 434 connects a side of the first connecting plate 433 away from the first fixing portion 431 and extends in a direction away from the other second fixing portion 432, that is, the second connecting plates 434 of the two second fixing portions 432 extend in directions away from each other, the flat voice coil 42 is mounted on a surface of the first connecting plate 433 facing the other first connecting plate 433, and the second centering branch 44 (the second supporting section 441) is connected to a surface of the second connecting plate 434 away from the first fixing portion 431 (the second diaphragm 41). With this arrangement, the second fixing portion 432 can fix both the flat voice coil 42 and the second supporting piece 44, and can avoid the interference between the flat voice coil 42 and the second supporting piece 44 (the second supporting section 441), and can also contact the flat voice coil 42 and the second supporting piece 44 (the second supporting section 441), so as to increase the assembling selectivity and facilitate the assembling of the sound generating apparatus.

The present invention further provides an electronic device, which includes a housing and a sound generating device, and the specific structure of the sound generating device refers to the foregoing embodiments. Wherein, the sound generating device is arranged in the shell. The electronic device may be a mobile phone, a tablet computer, a computer, or a wearable device such as a watch.

In one embodiment, the casing has a mounting cavity, the sound generating device is mounted in the mounting cavity and divides the mounting cavity into a first sound cavity and a second sound cavity, the first diaphragm is communicated with the first sound cavity, the second diaphragm is communicated with the second sound cavity, and the casing is provided with two sound holes, one of which is communicated with the first sound cavity, and the other is communicated with the second sound cavity. So set up, when first vibrating diaphragm and second vibrating diaphragm syntropy vibration, can make the sound wave that two phonate holes came out be opposite phase's sound wave to make the sound wave from two phonate holes come out form the sound dipole, thereby can reduce the risk of leaking the sound. When the first diaphragm and the second diaphragm vibrate in opposite directions, the sound volume can be increased. Of course, in other embodiments, only one sound outlet hole may be provided, and the sound outlet hole communicates the first sound cavity and the second sound cavity.

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

Claims

1. A sound generating device, comprising:

a housing;

the magnetic circuit system comprises a central magnetic circuit structure and an edge magnetic circuit structure, the central magnetic circuit structure comprises a central magnet and two central magnetic conduction plates which are respectively arranged on the upper side and the lower side of the central magnet, each central magnetic conduction plate comprises a first magnetic conduction part corresponding to the central magnet, at least one central magnetic conduction plate comprises a connecting part which extends outwards from the edge of the first magnetic conduction part, and the connecting part is connected with the shell or the edge magnetic circuit structure; the side magnetic circuit structure is fixed on the shell and comprises a plurality of side magnets arranged around the central magnet and side magnetic conductive plates arranged on the upper side and the lower side of each side magnet; magnetic gaps are formed between the central magnet and the central magnetic conduction plate and between the side magnets and the side magnetic conduction plates;

2. The apparatus according to claim 1, wherein said two central magnetic plates comprise a first central magnetic plate and a second central magnetic plate, said first central magnetic plate comprising two said connecting portions disposed on opposite sides of a first magnetic conductive portion of said first central magnetic plate.

3. The sound generating apparatus of claim 2, wherein the first central magnetic conductive plate is located on a side of the central magnet near the second diaphragm;

the edge magnetic conduction plates comprise first edge magnetic conduction plates corresponding to the first central magnetic conduction plate and second edge magnetic conduction plates corresponding to the second central magnetic conduction plate;

the two connecting parts are connected with the corresponding first side magnetic conduction plates.

4. The sound production apparatus as claimed in claim 2, wherein the first central magnetic conductive plate is disposed on a side of the central magnet close to the first diaphragm, and each of the connecting portions includes a first connecting section and a second connecting section, the first connecting section is connected to an edge of the first magnetic conductive portion and extends toward the second diaphragm, and the second connecting section is connected to a side of the first connecting section away from the first magnetic conductive portion and extends toward a side of the central magnet;

the side magnet corresponding to the two connecting parts comprises an upper part and a lower part, and the two connecting parts are positioned between the upper part and the lower part;

the part of the annular voice coil extending into the magnetic gap is positioned on one side of the first connecting section, which is far away from the other central magnet.

5. The sound generating apparatus as claimed in claim 1, wherein said magnetic gap comprises two first gaps and two second gaps, the two first gaps and the two second gaps are alternately arranged along the circumferential direction of said central magnet, said flat voice coil extends into said first gaps, and said connecting portion is disposed at the intersection of said first gaps and said second gaps.

6. The sound apparatus as claimed in claim 5, wherein each of said two central magnetic plates comprises said first magnetic conductive portion and said connecting portion, said central magnet being disposed between said two first magnetic conductive portions, each of said connecting portions being disposed at an intersection of said first gap and said second gap;

two the connecting portion of center magnetic conduction board sets up relatively, and two the connecting portion of center magnetic conduction board are the form of buckling towards each other to interconnect.

7. The sound production device according to claim 1, wherein the edge magnetic conductive plate includes an annular connecting portion and an edge magnetic conductive portion, the annular connecting portion is connected to the housing, the edge magnetic conductive portion is connected to an inner side of the annular connecting portion, and the edge magnetic body is provided on a surface facing the first diaphragm and a surface facing the second diaphragm.

8. The sound generating apparatus of any one of claims 1 to 7, wherein the second vibration system further comprises a connection bracket connecting the second diaphragm and the flat voice coil.

9. The sound generating apparatus according to claim 8, wherein the connecting bracket includes a first fixing portion and two second fixing portions partially disposed at two ends of the first fixing portion, the first fixing portion is connected to the second diaphragm, and the second fixing portion extends in a direction away from the second diaphragm;

the second vibration system comprises two connecting brackets and two flat voice coils;

one end of one flat voice coil is connected with one second fixing part of one connecting support, and the other end of the flat voice coil is connected with one second fixing part of the other connecting support;

and two ends of the other flat voice coil are respectively connected with the other second fixing parts of the two connecting brackets.

10. The sound generating apparatus of any one of claims 1 to 7, wherein the first vibration system further comprises a first spider elastically connecting the annular voice coil and the housing; and/or, the second vibration system further comprises a second centering branch sheet, and the second centering branch sheet is elastically connected with the flat voice coil and the shell.