CN115022779A

CN115022779A - Kernel, loudspeaker module and electronic equipment

Info

Publication number: CN115022779A
Application number: CN202111335578.9A
Authority: CN
Inventors: 刘金华
Original assignee: Beijing Honor Device Co Ltd
Current assignee: Beijing Honor Device Co Ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-09-06

Abstract

The application provides a kernel, a loudspeaker module and an electronic device. The core includes a magnetic circuit system. The magnetic circuit system comprises a central magnet, a side magnet, a first central magnetic conductive yoke and a second central magnetic conductive yoke; the side magnets are arranged around the periphery of the central magnet; the central magnet is provided with a first surface and a second surface which are opposite in the thickness direction of the central magnet, the first central magnetic guide yoke is arranged on the first surface in a stacking mode, a first groove is formed in the middle of the first central magnetic guide yoke facing to the first surface, the second central magnetic guide yoke is arranged on the second surface in a stacking mode, and a second groove is formed in the middle of the second central magnetic guide yoke facing to the second surface; the first surface is provided with a first protruding part, the second surface is provided with a second protruding part, the first protruding part is matched in the first groove, and the second protruding part is matched in the second groove. According to the inner core of the loudspeaker module, the magnetic flux of the magnetic circuit system can be improved, the driving force of the magnetic circuit system to the voice coil is improved, and the loudspeaker module has larger amplitude.

Description

Kernel, loudspeaker module and electronic equipment

Technical Field

The application relates to the technical field of electronic equipment, in particular to a kernel, a loudspeaker module and electronic equipment.

Background

At present, electronic devices such as Personal Computers (PCs), tablet computers, mobile phones, etc. need to be designed to be thinner and thinner due to consumer demands. Meanwhile, with the increase of consumption demand, these electronic devices are also required to achieve better sound effect experience. The loudspeaker module among the prior art, the audio is poor, still can not satisfy user's user demand.

Disclosure of Invention

The application provides a kernel, speaker module and electronic equipment, and this electronic equipment can improve the audio frequency effect.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, the present application provides a core comprising a magnetic circuit system. The magnetic circuit system comprises a central magnet, a side magnet, a first central magnetic conductive yoke and a second central magnetic conductive yoke; the side magnets are arranged around the periphery of the central magnet, the magnetizing direction of the side magnets is opposite to that of the central magnet, and a magnetic gap is formed between the side magnets and the central magnet; the central magnet is provided with a first surface and a second surface which are opposite to each other along the thickness direction of the central magnet, the first central magnetic guide yoke is arranged on the first surface in a laminated mode, a first groove is formed in the middle of the first central magnetic guide yoke facing to the first surface, the second central magnetic guide yoke is arranged on the second surface in a laminated mode, and a second groove is formed in the middle of the second central magnetic guide yoke facing to the second surface; the first surface is provided with a first protruding part, the second surface is provided with a second protruding part, the first protruding part is matched in the first groove, and the second protruding part is matched in the second groove.

According to the kernel of this application embodiment, through set up first recess on first center magnet yoke, set up the second recess on second center magnet yoke, and set up respectively on central magnet with the first bulge of first recess adaptation and with the second bulge of second recess adaptation, thereby be favorable to under the prerequisite of the thickness that does not change magnetic circuit, make central magnet, the whole thickness of first bulge and second bulge increases, and then improve magnetic circuit's magnetic flux, improve magnetic circuit's drive power to the voice coil loudspeaker voice coil, make the speaker module have bigger amplitude, and make the audio frequency performance of speaker module obtain the optimization. In addition, still be favorable to reducing the thickness of first center magnetic yoke and second center magnetic yoke middle part department to be favorable to solving the magnetic conduction ability surplus problem in the middle part of first center magnetic yoke and second center magnetic yoke at least to a certain extent, improve the magnetic conduction efficiency in first center magnetic yoke and second center magnetic yoke middle part.

In an embodiment of the first aspect of the present application, the shape of the second projection is the same as the shape and size of the first projection. Specifically, the second protrusion and the first protrusion are symmetrically arranged with respect to the center magnet. Set up like this, simple structure is favorable to improving the whole thickness of second bulge, first bulge and central magnet moreover, improves the magnetic flux.

In some embodiments of the first aspect of the present application, a distance between the wall surface of the first groove and the first surface gradually decreases in a direction from a center of the first center yoke to an outer periphery of the first center yoke. Therefore, the uniformity of the magnetic saturation degree on the first central magnetic conductive yoke can be further improved, so that more magnetic lines of force are transmitted between the voice coil and the magnet, and the magnetic induction intensity of the magnetic circuit system is further improved.

In some embodiments of the first aspect of the present application, the wall surface of the first groove is a spherical crown surface or a conical surface.

In some embodiments of the first aspect of the present application, the thickness of the first center magnetic yoke at the first groove is less than the thickness of the first magnetic yoke at other locations. Thereby can solve the surplus problem of magnetic conduction ability in the middle part of first center magnetic conduction yoke, improve the magnetic conduction efficiency in first center magnetic conduction yoke middle part and the magnetic saturation degree that first center magnetic conduction yoke corresponds to first recess department.

In some embodiments of the first aspect of the present application, a distance between the wall surface of the second groove and the second surface gradually decreases in a direction from a center of the second center yoke to an outer periphery of the second center yoke. Therefore, the uniformity of the magnetic saturation degree on the second central magnetic conducting yoke can be further improved, so that more magnetic lines of force can be transmitted between the voice coil and the magnet, and the magnetic induction intensity of the magnetic circuit system is further improved.

In some embodiments of the first aspect of the present application, a thickness of the second center magnetic yoke at the second groove is less than a thickness of the second magnetic yoke at other locations. Therefore, the problem that the magnetic conductivity of the middle part of the second central magnetic conduction yoke is excessive can be solved, and the magnetic conductivity efficiency of the middle part of the second central magnetic conduction yoke and the magnetic saturation degree of the second central magnetic conduction yoke corresponding to the second groove are improved.

In some embodiments of the first aspect of the present application, the magnetic circuit system further comprises a first edge yoke; the first edge magnetic guide yoke is stacked on the surface of the side magnet, which faces the same direction as the first surface, is positioned on the periphery of the first center magnetic guide yoke and is separated from the first center magnetic guide yoke; the surface of the first edge magnetic guiding yoke facing the edge magnet is provided with a first matching area, the first matching area comprises a first area and a second area, the second area is positioned on one side of the first area far away from the first center magnetic guiding yoke and extends to one side edge of the first edge magnetic guiding yoke far away from the first center magnetic guiding yoke, and the distance between the second area and the plane where the center magnet is positioned is larger than the distance between the first area and the plane where the center magnet is positioned; the surface of the side magnet facing the first edge magnetic guide yoke is provided with a first adaptation area, the first adaptation area comprises a first sub adaptation area and a second sub adaptation area, the second sub adaptation area is positioned on one side, away from the central magnet, of the first sub adaptation area, the distance between the second sub adaptation area and the plane where the central magnet is positioned is larger than the distance between the first sub adaptation area and the plane where the central magnet is positioned, the second sub adaptation area adapts to the second area, and the first sub adaptation area adapts to the first area.

In the embodiment of the application, the second area is arranged on the surface, facing the side magnet, of the first edge magnetic guiding yoke, and the distance between the second area and the plane where the central magnet is located is larger than the distance between the first area and the plane where the central magnet is located. Like this, the second region can dodge the sub-adaptation region of second to the sub-adaptation region's of second setting on the limit magnet of being convenient for, thereby increase the thickness that the limit magnet corresponds in the sub-adaptation region department of second, and then do benefit to the drive that more magnetic lines of force that correspond to the sub-adaptation region department of second on the limit magnet can participate in the voice coil, improve magnetic circuit's magnetic induction, improve magnetic circuit's drive power to the voice coil.

In some embodiments of the first aspect of the present application, the first edge magnetic yoke has a thickness at the first region that is greater than a thickness of the first edge magnetic yoke, and the edge magnet has a thickness at the second sub-accommodation region that is greater than a thickness of the edge magnet at the first sub-accommodation region. A thickness at the second region. Can realize like this under the prerequisite that does not change magnetic circuit's overall dimension, through the thickness that reduces the regional department of second on the first edge magnetic yoke, improve first edge magnetic yoke's magnetic conduction efficiency, reach the purpose of the thickness of increase limit magnet in the regional department of second adaptation simultaneously, do benefit to on the limit magnet more magnetic lines of force that correspond to the regional department of second adaptation and can participate in the drive of voice coil loudspeaker voice coil, improve magnetic circuit's magnetic induction, improve magnetic circuit's the drive power to the voice coil loudspeaker voice coil.

In some embodiments of the first aspect of the present application, the first region has a width dimension d, the first edge yoke has a thickness dimension h corresponding to the first region, and d and h satisfy d ≧ 0.5 h. In this way, the width dimension of the first region and the thickness dimension of the first region at the position of the first edge magnetic yoke can be combined to optimize the structure of the first edge magnetic yoke and improve the magnetic permeability efficiency of the first edge magnetic yoke.

In some embodiments of the first aspect of the present application, the second region extends obliquely from the first region toward a direction away from a plane in which the central magnet lies, in a direction from a center of the first center yoke to an outer periphery of the first center yoke. Therefore, the change of the shape of the side magnet is facilitated, more magnetic lines of force corresponding to the second sub-adaptation area on the side magnet participate in the driving of the voice coil, the magnetic induction intensity of the magnetic circuit system is improved, and the driving force of the magnetic circuit system on the voice coil is improved.

In some embodiments of the first aspect of the present application, the side magnets comprise first, second, third and fourth side magnets that are spaced apart; the first side magnet and the second side magnet are respectively arranged at two opposite sides of the central magnet, the third side magnet and the fourth side magnet are respectively arranged at the other two opposite sides of the central magnet, and the arrangement direction of the third side magnet and the fourth side magnet is vertical to the arrangement direction of the first side magnet and the second side magnet; the first edge yoke includes: the first sub-edge magnetic yoke, the second sub-edge magnetic yoke, the third sub-edge magnetic yoke and the fourth sub-edge magnetic yoke are spaced apart, the first sub-edge magnetic yoke is adapted to the first edge magnet, the second sub-edge magnetic yoke is adapted to the second edge magnet, the third sub-edge magnetic yoke is adapted to the third edge magnet, the fourth sub-edge magnetic yoke is adapted to the fourth edge magnet, and first matching areas are formed on the first sub-edge magnetic yoke and the second sub-edge magnetic yoke respectively.

In some embodiments of the first aspect of the present application, the core further comprises a frame, a voice coil, and an electrical connection; the magnetic circuit system is fixed on the surface of the frame, which faces the same direction as the second surface, the voice coil is positioned in the frame, and part of the voice coil extends into the magnetic gap; the basin frame is the rectangle frame form, and the basin frame is including relative first short limit portion and the second short limit portion that sets up, and the extending direction of first short limit portion and second short limit portion is unanimous with the range direction of third edge magnet, fourth side magnet, and electric connection piece electricity is connected the voice coil loudspeaker voice coil to be fixed in between first short limit portion and the voice coil loudspeaker voice coil.

In some embodiments of the first aspect of the present application, the voice coil is in a rectangular frame shape, and the extending directions of two adjacent sides of the voice coil are respectively consistent with the length direction and the width direction of the basin frame; the electric connecting piece is provided with two first end parts, and the two first end parts of the electric connecting piece are respectively connected with two corner positions of the voice coil, which are adjacent to the first short side part.

In some embodiments of the first aspect of the present application, the electrical connector has two second end portions, the two second end portions of the electrical connector are respectively disposed at two ends of the first short side portion, and the two second end portions are respectively electrically connected to the two first end portions in a one-to-one correspondence.

In some embodiments of the first aspect of the present application, the electrical connector includes two electrical connection units, the two electrical connection units are spaced apart in an extending direction of the first short side portion, each electrical connection unit has a first end portion and a second end portion, and the first end portion and the second end portion of each electrical connection unit are electrically connected; the first short side portion is opposed to the first sub-edge yoke, and a portion of the first sub-edge yoke located between the two electrical connection units is fixed to a surface of the first short side portion facing the same direction as the second surface. By enabling the electric connector to comprise two spaced electric connection units, on one hand, the positive pole and the negative pole of the core can be completely spaced, and the reliability of electric connection between the core and the electric connection structure is improved; on the other hand, the part of the first sub-edge magnetic conducting yoke between the two electric connection units can be conveniently fixed to the bottom surface of the first short side part, so that the reliability of connection of the basin stand and the magnetic circuit system is improved.

In some embodiments of the first aspect of the present application, two ends of the first sub-edge magnetic yoke along the extending direction of the first short-side portion are respectively formed with an avoidance notch, the avoidance notch extends to one side edge of the first sub-edge magnetic yoke, which is far away from the second sub-edge magnetic yoke, at least two parts of the surface of the first edge magnet, which faces the first sub-edge magnetic yoke, which are right opposite to the avoidance notches are respectively formed with an avoidance region, each avoidance notch and the avoidance region at the corresponding position define an avoidance space, and the avoidance space is used for avoiding the electrical connection unit at the corresponding position. In the embodiment of the application, the avoidance space is arranged on the magnetic circuit system, so that the avoidance space is utilized to avoid the electric connection unit, on one hand, the size of the electric connection unit is favorably increased, and the deformation capacity of the electric connection unit is improved; on the other hand, the magnetic circuit system can be prevented from interfering with the movement of the electric connection unit.

In some embodiments of the first aspect of the present application, the first mating region of the first sub-edge yoke is located between the two relief notches along the extension of the first short side portion.

In some embodiments of the first aspect of the present application, the first sub-edge magnetic conductive yoke includes a first portion, a second portion, and a third portion, the first portion, the second portion, and the third portion are sequentially arranged and connected along an extending direction of the first short side portion, a surface of the second portion facing the side magnet is formed as a first fitting region, and an end of the second portion away from the first center magnetic conductive yoke respectively exceeds the first portion and the third portion in a direction away from the first center magnetic conductive yoke to respectively define two avoiding gaps with the first portion and the third portion.

In some embodiments of the first aspect of the present application, the edge-facing magnet surface of the third portion, the edge-facing magnet surface of the first portion, and the first region on the second portion are coplanar.

In some embodiments of the first aspect of the present application, the third and fourth sub-edge yokes each have a first mating region formed thereon.

In some embodiments of the first aspect of the present application, a side surface of the first edge magnetic yoke facing away from the edge magnet and a side surface of the first center magnetic yoke facing away from the center magnet are coplanar. The arrangement is favorable for improving the structural compactness of the magnetic circuit system, the structural layout of the magnetic circuit system is more reasonable, and the driving force of the magnetic circuit system on the voice coil is favorably improved.

In some embodiments of the first aspect of the present application, the magnetic circuit system further comprises: the second edge magnetic guide yoke is arranged on the surface of the side magnet, which is in the same direction as the second surface, and is positioned on the periphery of the second center magnetic guide yoke; a second matching area is formed on the surface, facing the side magnet, of the second edge magnetic yoke, and comprises a third area and a fourth area which are connected, the third area extends to the edge of one side, close to the first center magnetic yoke, of the second edge magnetic yoke, the fourth area is located on one side, far away from the second center magnetic yoke, of the third area, and the distance between the fourth area and the plane where the center magnet is located is larger than the distance between the third area and the plane where the center magnet is located; the surface of the side magnet facing the second edge magnetic guiding yoke is provided with a second adaptive area, the second adaptive area comprises a third sub adaptive area and a fourth sub adaptive area, the fourth sub adaptive area is positioned on one side of the third sub adaptive area far away from the central magnet, the distance between the fourth sub adaptive area and the plane where the central magnet is positioned is larger than the distance between the third sub adaptive area and the plane where the central magnet is positioned, the fourth sub adaptive area is adaptive to the fourth area, and the third sub adaptive area is adaptive to the third area. Like this, the fourth region can dodge the sub-adaptation region of fourth to in the regional setting of sub-adaptation on the limit magnet, thereby increase the thickness that the limit magnet corresponds in the regional department of sub-adaptation of fourth, and then do benefit to more magnetic lines of force that correspond to the regional department of sub-adaptation of fourth on the limit magnet and can participate in the drive of voice coil loudspeaker voice coil, improve magnetic circuit's magnetic induction intensity, improve magnetic circuit's the drive power to the voice coil loudspeaker voice coil.

In some embodiments of the first aspect of the present application, the third region has a width dimension m, the first edge magnetic yoke has a thickness dimension n corresponding to the first region, and m and n satisfy m ≧ 0.5 n. In this way, the width dimension of the first region and the thickness dimension of the first region at the position of the first edge magnetic yoke can be combined to optimize the structure of the first edge magnetic yoke and improve the magnetic permeability efficiency of the first edge magnetic yoke.

In some embodiments of the first aspect of the present application, the fourth region extends obliquely from the third region toward a direction away from a plane in which the central magnet lies, in a direction from a center of the second center yoke to an outer periphery of the second center yoke. Therefore, the change of the shape of the side magnet is favorably utilized, more magnetic lines of force of the side magnet participate in the driving of the voice coil, the magnetic induction intensity of the magnetic circuit system is improved, and the driving force of the magnetic circuit system to the voice coil is improved.

In some embodiments of the first aspect of the present application, the side magnets comprise first and second spaced-apart side magnets; the first side magnet and the second side magnet are respectively arranged at two opposite sides of the central magnet; at least the parts of the second edge magnetic yoke respectively opposite to the first side magnet and the second side magnet are respectively provided with a second matching area.

In some embodiments of the first aspect of the present application, the side magnets comprise spaced-apart third and fourth side magnets; the third edge magnet and the fourth edge magnet are respectively arranged at the other opposite two sides of the central magnet, the arrangement direction of the third edge magnet and the fourth edge magnet is vertical to the arrangement direction of the first edge magnet and the second edge magnet, and at least the parts of the second edge magnetic guide yoke, which are respectively opposite to the third edge magnet and the fourth edge magnet, are respectively provided with a second matching area.

In some embodiments of the first aspect of the present application, the second edge yoke is rectangular ring shaped, and an entire surface of the second edge yoke facing the side magnet is formed with the second mating region.

In some embodiments of the first aspect of the present application, the second edge yoke is connected to the second center yoke by a connecting yoke portion, wherein the connecting yoke portion is directly opposite the magnetic gap.

In some embodiments of the first aspect of the present application, a thickness of the connecting yoke portion, a thickness of the second edge magnetic yoke at the third region, and a thickness of a portion of the second center magnetic yoke where the second groove is not provided are equal. Therefore, the magnetic current strength can be further increased, and the magnetic conduction effect of the second magnetic conduction yoke is improved.

In some embodiments of the first aspect of the present application, a side surface of the second edge magnet yoke facing away from the edge magnet and a side surface of the second center magnet yoke facing away from the center magnet are coplanar.

In a second aspect, the present application also provides another kernel, including: the magnetic circuit system comprises a central magnet, a side magnet and a first central magnetic conductive yoke; the side magnets are arranged around the periphery of the central magnet, the magnetizing direction of the side magnets is opposite to that of the central magnet, and a magnetic gap is formed between the side magnets and the central magnet; the center magnet has a first surface along one side of its own thickness direction, and a first center magnetic yoke is laminated and arranged on the first surface, and a first convex portion is formed at an edge of a surface of the first center magnetic yoke, which is away from the center magnet, and extends in the entire circumferential direction of the first center magnetic yoke. Can increase the thickness in the edge of first center yoke like this to can increase the magnetic saturation limit in the edge of first center yoke, can utilize first center yoke like this to lead the voice coil loudspeaker voice coil with more magnetic lines of force, improve magnetic circuit's magnetic flux, thereby improve magnetic circuit's the drive power to the voice coil loudspeaker voice coil, make the speaker module have more amplitude, and make the audio performance of speaker module obtain optimizing.

In some embodiments of the second aspect of the present application, the magnetic circuit system includes a first edge yoke laminated on a same-facing surface of the side magnet as the first surface, the first edge yoke being located at an outer periphery of the first center yoke and spaced apart from the first center yoke; a portion of a surface of the first edge yoke facing away from the side magnet adjacent to the second center yoke is formed with a second protrusion.

In some embodiments of the second aspect of the present application, the magnetic circuit system further comprises a second central magnetic yoke; the center magnet has a second surface opposite to the first surface, the second center magnetic yoke is laminated on the second surface, and a third convex part is formed at an edge of the surface of the second center magnetic yoke facing away from the center magnet, and extends in the entire circumferential direction of the second center magnetic yoke. Can increase the thickness in the edge of second center yoke like this to can increase the magnetic saturation limit in the edge of second center yoke, can utilize second center yoke like this to lead the voice coil loudspeaker voice coil with more magnetic lines of force, improve magnetic circuit's magnetic flux, thereby improve magnetic circuit's drive power to the voice coil loudspeaker voice coil, make the speaker module have more amplitude, and make the audio performance of speaker module obtain optimizing.

In some embodiments of the second aspect of the present application, the magnetic circuit system further comprises a second edge yoke disposed on a same facing surface of the side magnet as the second surface and located at an outer periphery of the second center yoke; a portion of the surface of the second edge yoke facing away from the edge magnets adjacent to the second center yoke is formed with a fourth convex portion. Can increase the thickness of second edge yoke in neighbouring voice coil loudspeaker voice coil position department like this to can increase the magnetic saturation limit in the edge of second edge yoke, can utilize second edge yoke like this with more magnetic lines of force direction voice coil loudspeaker voice coil, improve magnetic circuit's magnetic flux, thereby improve magnetic circuit to the drive power of voice coil loudspeaker voice coil, make the speaker module have more amplitude, and make the audio performance of speaker module obtain optimizing.

The third aspect, this application provides a speaker module, including casing and above-mentioned arbitrary technical scheme's kernel, the kernel sets up in the casing, and the casing is separated for ante-chamber and back cavity by the vibrating diaphragm component of kernel, and the voice coil loudspeaker voice coil and the magnetic circuit of kernel all are located the back cavity, are equipped with out the sound passageway on the casing, ante-chamber and play sound passageway intercommunication.

Because the loudspeaker module that this application embodiment provided includes the kernel of any above-mentioned embodiment, so the two can solve the same technical problem to reach the same effect.

In a fourth aspect, the present application provides an electronic device, which includes a housing, a motherboard, and the speaker module described above, wherein the motherboard and the speaker module are disposed in the housing, and the speaker module is electrically connected to the motherboard, and the housing is provided with a sound hole, and the sound channel is communicated with the sound hole.

Because the electronic equipment provided by some embodiments of the present application includes the speaker module set described above, the electronic equipment provided by the embodiments of the present application includes the speaker module set described above, so that the two can solve the same technical problem and achieve the same effect.

Drawings

Fig. 1 is a schematic structural diagram of an electronic device according to some embodiments of the present application;

FIG. 2 is an exploded schematic view of the electronic device shown in FIG. 1;

FIG. 3 is a schematic diagram of a speaker module according to the electronic device shown in FIG. 2;

fig. 4 is a schematic cross-sectional view taken along line a-a of the speaker module shown in fig. 3;

FIG. 5 is a perspective view of a core provided by some embodiments of the present application;

FIG. 6 is an exploded view of the core shown in FIG. 5;

FIG. 7 is a perspective view of the basin stand shown in FIGS. 5-6;

FIG. 8 is a schematic cross-sectional structure view taken along the line B-B and matching the diaphragm group with the frame shown in FIG. 5;

FIG. 9 is a schematic view of the diaphragm assembly, the voice coil and the frame shown in FIG. 5;

FIG. 10 is a schematic cross-sectional view of the inner core shown in FIG. 5 taken along line B-B;

fig. 11 is an exploded view of the magnetic circuit system according to fig. 5;

FIG. 12 is a schematic view of magnetic flux emission from the inner core shown in FIGS. 5-6;

FIG. 13 is a schematic diagram illustrating a magnetic circuit system according to another embodiment of the present application;

fig. 14 is a schematic cross-sectional exploded view of the magnetic circuit system shown in fig. 13 at the C-C line;

fig. 15 is a schematic cross-sectional mating structure of the magnetic circuit system shown in fig. 13 at the C-C line;

FIG. 16 is a schematic view of the first edge yoke shown in FIG. 13;

FIG. 17 is a schematic view of the edge magnet according to FIG. 13;

FIG. 18 is a schematic view of the engagement of the edge magnet and the first edge guide yoke according to FIG. 13;

fig. 19 is a schematic structural view of a second magnetic yoke in the magnetic circuit system shown in fig. 13;

FIG. 20 is a schematic diagram illustrating the engagement of the second magnetic yoke, the side magnet and the first edge magnetic yoke in the magnetic circuit system of FIG. 13;

FIG. 21 is a schematic diagram of the magnetic circuit system, the frame, the voice coil, the electrical connector, and the counterweight balancing unit of FIG. 13;

FIG. 22 is a schematic view of the magnetic circuit system, voice coil, electrical connector and counterweight balance unit according to FIG. 13;

fig. 23 is a schematic view of magnetic flux emission according to the magnetic circuit system shown in fig. 13;

fig. 24 is a schematic cross-sectional view of a magnetic circuit system according to still another embodiment of the present application;

fig. 25 is a cross-sectional view of a magnetic circuit system according to still other embodiments of the present application;

fig. 26 is a cross-sectional view of a magnetic circuit system according to some other embodiments of the present application;

fig. 27 is a schematic cross-sectional view of a magnetic circuit system according to still other embodiments of the present application;

fig. 28 is a schematic cross-sectional view of a magnetic circuit system according to another embodiment of the present application.

Detailed Description

In the embodiments of the present application, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include one or more of the features.

In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and mean that, for example, "connected" may or may not be detachably connected; may be directly connected or may be indirectly connected through an intermediate. The term "fixedly connected" means that they are connected to each other and their relative positions do not change after the connection. "rotationally coupled" means coupled to each other and capable of relative rotation after being coupled. "slidably connected" means connected to each other and capable of relative sliding movement after being connected.

The directional terms used in the embodiments of the present application, such as "inner", "outer", etc., are used solely in reference to the orientation of the figures, and thus, are used for better and clearer illustration and understanding of the embodiments of the present application, rather than to indicate or imply that the device or element so referred to must be in a particular orientation, constructed and operated in a particular orientation, and therefore should not be considered limiting of the embodiments of the present application. In addition, the term "plurality" as used herein means two or more unless otherwise specified in the present application.

In the description of the embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element identified by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

In the embodiment of the present application, "and/or" is only one kind of association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

The application provides an electronic device, which is a type of electronic device with a loudspeaker module. Specifically, the electronic device includes, but is not limited to, a mobile phone, a tablet personal computer (tablet personal computer), a laptop computer (laptop computer), a Personal Digital Assistant (PDA), a personal computer, a notebook computer, a vehicle-mounted device, a wearable device, a walkman, a radio, a television, a sound box, and the like. Wherein, wearable devices include but are not limited to smart bracelet, smart watch, smart head-mounted display, smart glasses, etc.

Referring to fig. 1-2, fig. 1 is a schematic structural diagram of an electronic device 100 according to some embodiments of the present disclosure, and fig. 2 is an exploded schematic diagram of the electronic device 100 shown in fig. 1. In an embodiment of the application, the electronic device 100 is a mobile phone. Specifically, the electronic device 100 may include a housing 10, a screen 20, a main control board 30, an interface board 40, a connection structure 50, a battery 60, and a speaker module 80.

It should be noted that fig. 1 and fig. 2 and the related drawings below only schematically show some components included in the electronic device 100, and the actual shape, the actual size, the actual position and the actual configuration of the components are not limited by fig. 1 and fig. 2 and the drawings below. In addition, when the electronic device 100 is an electronic device of some other form, the electronic device 100 may not include the interface main board 40, the connection structure 50, the screen 20, and the battery 60.

In the embodiment shown in fig. 1 and 2, the electronic device 100 has a rectangular flat plate shape. For convenience of the following description of the embodiments, an XYZ coordinate system is established. Specifically, the width direction of the electronic device 100 is defined as the X-axis direction, the length direction of the electronic device 100 is defined as the Y-axis direction, the thickness direction of the electronic device 100 is defined as the Z-axis direction, and the X-axis, the Y-axis and the Z-axis are perpendicular to each other. It is understood that the coordinate system setting of the electronic device 100 can be flexibly set according to actual needs, and is not particularly limited herein. In other embodiments, the shape of the electronic device 100 may also be a square flat plate, a diamond flat plate, a circular flat plate, an oval flat plate, an oblong flat plate, a triangular flat plate, a special flat plate, or the like.

The screen 20 is used to display images, video, and the like. Referring to fig. 2, the screen 20 includes a transparent cover 21 and a display 22 (also called a display panel). The light-transmitting cover 21 is stacked on the display screen 22. Specifically, the transparent cover 21 and the display 22 may be fixedly connected by gluing or the like. The light-transmitting cover plate 21 is mainly used for protecting and dust-proof the display screen 22. The material of the transparent cover plate 21 includes, but is not limited to, glass, ceramic, and plastic.

The display 22 may be a flexible display or a rigid display. For example, the display screen 22 may be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini-organic light-emitting diode (mini-OLED) display screen, a micro-light-emitting diode (micro-OLED) display screen, a micro-OLED display screen, a quantum dot light-emitting diode (QLED) display screen, or a liquid crystal display (liquid crystal display, LCD), etc.

The housing 10 is used to protect the internal electronics of the electronic device 100. With continued reference to fig. 1-2, housing 10 includes a back cover 12 and a bezel 11. The back cover 12 is located on one side of the display screen 22 away from the transparent cover plate 21, and the back cover 12 is stacked with the transparent cover plate 21 and the display screen 22. The frame 11 is located between the back cover 12 and the transparent cover plate 21, and the frame 11 is fixed on the back cover 12. For example, the frame 11 may be fixedly connected to the back cover 12 by gluing, clamping, welding, or screwing. The frame 11 and the back cover 12 may also be an integrally formed structure, that is, the frame 11 and the back cover 12 are an integral structure, so that the connection strength between the frame 11 and the back cover 12 is high. The material of the back cover 12 includes, but is not limited to, metal, ceramic, plastic, and glass. In order to achieve the lightness and thinness of the electronic device 100 while ensuring the structural strength of the back cover 12, the material of the back cover 12 may be selected as metal. The material of the frame 11 includes, but is not limited to, metal, ceramic, plastic, and glass. The material of the frame 11 may be the same as that of the back cover 12, but may be different.

In some embodiments, the light-transmissive cover 21 is secured to the bezel 11. Specifically, the light-transmitting cover 21 may be fixed to the bezel 11 by gluing. The transparent cover plate 21, the back cover 12 and the frame 11 enclose an inner accommodating space of the electronic device 100. The internal receiving space receives the display screen 22, the main control board 30, the interface board 40, the connection structure 50, the battery 60, and the speaker module 80 therein.

The main control board 30 is used for integrating a main control chip. The main control board 30 may be fixed to the surface of the display screen 22 near the back cover 12. Illustratively, the main control board 30 may be fixed to the surface of the display screen 22 near the back cover 12 by screwing, clipping, gluing, or welding. In other embodiments, referring to fig. 2, the housing 10 further includes a middle plate 13. The middle plate 13 is fixed to the inner peripheral surface of the frame 11. The middle plate 13 may be fixed to the frame 11 by welding, screwing, clipping, or gluing, for example. The middle plate 13 may be integrally formed with the frame 11. The material of the middle plate 13 includes, but is not limited to, metal, ceramic, plastic and glass. The material of the middle plate 13 may be the same as that of the back cover 12, or may be different from that of the back cover. The middle plate 13 serves as a structural "skeleton" of the electronic device 100, and the main control motherboard 30 may be fixed on a side surface of the middle plate 13 facing the back cover 12 by means of screwing, clipping, welding, and the like.

The main control chip may be, for example, an Application Processor (AP), a double data rate synchronous dynamic random access memory (DDR), a universal flash memory (UFS), and the like. In some embodiments, the main control board 30 is electrically connected to the screen 20, and the main control board 30 is configured to control the screen 20 to display an image or a video.

The main control motherboard 30 may be a hard circuit board, a flexible circuit board, or a rigid-flexible circuit board. The main control board 30 may be an FR-4 dielectric board, a Rogers (Rogers) dielectric board, a hybrid FR-4 and Rogers dielectric board, or the like. Here, FR-4 is a code for a grade of flame-resistant material, and the Rogers dielectric plate is a high-frequency plate.

The interface board 40 is fixed in the internal receiving space of the electronic device 100. The interface main board 40 and the main control main board 30 are arranged in the Y-axis direction. The interface main board 40 may be fixed to a surface of the middle plate 13 facing the back cover 12. Specifically, the interface main board 40 may be fixed on the surface of the middle board 13 facing the back cover 12 by screwing, clipping, gluing or welding. In other embodiments, when the housing 10 does not include the middle plate 13, the interface board 40 may be fixed to a surface of the display screen 22 facing the back cover 12. Specifically, the interface main board 40 may be fixed on a side surface of the display screen 22 facing the back cover 12 by screwing, clipping, gluing, or welding.

The interface main board 40 may be a hard circuit board, a flexible circuit board, or a hard-soft combined circuit board. The interface board 40 may be an FR-4 dielectric board, a Rogers (Rogers) dielectric board, a hybrid FR-4 and Rogers dielectric board, or the like.

The interface main board 40 is electrically connected to the main control main board 30 through the connection structure 50, so as to realize data and signal transmission between the interface main board 40 and the main control main board 30. The connection structure 50 may be a Flexible Printed Circuit (FPC). In other embodiments, the connecting structure 50 may also be a wire or a lacquered wire.

A serial bus (USB) device is integrated on the interface motherboard 40. The USB device 70 may be a USB type-C interface device, a USB type-A interface device, a USB type Micro-B interface device, or a USB type-B interface device. A socket 11b is provided on the frame 11 corresponding to the USB device 70, and accessories such as a charger, an earphone, and a data line can be electrically connected to the USB device 70 through the socket 11b, so as to transmit power, signals, and data.

The battery 60 is fixed in the internal receiving space of the electronic device 100. The battery 60 is located between the main control board 30 and the interface board 40. The battery 60 is used for providing power for the main control board 30, the interface board 40, the screen 20, the speaker module 80, and the like. In some embodiments, referring to fig. 2, the surface of the middle plate 13 facing the back cover 12 is provided with a mounting groove 13a, and the battery 60 is mounted in the mounting groove 13 a. In other embodiments, when the enclosure 10 does not include the middle plate 13, the mounting groove 13a may be further defined by the main control board 30, the interface board 40, and a surface of the display screen 22 facing the back cover 12.

The speaker module 80 is used for restoring audio electrical signals such as music and voice into sound, so that the electronic device 100 can support audio playing. In some embodiments, the speaker module 80 is electrically connected to at least one of the main control board 30 and the interface board 40. In some embodiments, the speaker module 80 is electrically connected to the interface board 40. At this time, the voice electrical signal sent by the main control board 30 is transmitted to the speaker module 80 via the interface board 40, and is further converted into a sound signal by the speaker module 80 to be output. Specifically, referring to fig. 2, the speaker module 80 has a sound outlet channel 80 a. The sound signal output from the speaker module 80 is output from the sound output channel 80 a. The frame 11 is provided with sound holes 11 a. The sound outlet hole 11a communicates with the sound outlet passage 80 a. The sound signal output from the sound outlet channel 80a is further output from the sound outlet hole 11a to the outside of the electronic device 100. In other embodiments, the speaker module 80 may also be directly electrically connected to the main control board 30 through an FPC, a wire, an enamel wire, or the like.

The speaker module 80 is fixed in the internal receiving space of the electronic device 100. With reference to fig. 2, the speaker module 80 is disposed on a side of the battery 60 away from the main control board 30. The speaker module 80 and the interface main board 40 are arranged side by side in the XY plane, and a part of the speaker module 80 and the interface main board 40 are arranged in the X axis direction. Another part of the speaker module 80 is arranged in the Y-axis direction with the interface board 40.

In this embodiment, the speaker module 80 can be used as a low frequency speaker, a mid-frequency or high frequency speaker, or both low and high frequency speakers.

Referring to fig. 3 and 4, fig. 3 is a schematic structural diagram of the speaker module 80 of the electronic device 100 shown in fig. 2, and fig. 4 is a schematic structural diagram of a cross-section of the speaker module 80 shown in fig. 3 along the line a-a. It should be noted that "at line a-a" means at the plane where the arrows at the two ends of line a-a and line a-a are located, and the description of the similar drawings shall be understood in the following, and the description thereof shall not be repeated. In this embodiment, speaker module 80 includes a housing 81, a core 82, and an electrical connection structure 83.

It should be noted that fig. 3-4 only schematically illustrate some components included in the speaker module 80, and the actual shape, the actual size, the actual position and the actual configuration of these components are not limited by fig. 3-4. The coordinate system in fig. 3 is represented by the same coordinate system as the coordinate system in fig. 1. That is, the orientation relationship of each component in the speaker module 80 in fig. 3 in the coordinate system shown in fig. 3 is the same as the orientation relationship of each component in the speaker module 80 in the coordinate system shown in fig. 1 when the speaker module 80 is applied in the electronic device 100 shown in fig. 1.

The shell 81 is used for supporting and fixing the inner core 82, and the shell 81 and the inner core 82 cooperate to enclose a front cavity C1 and a rear cavity C2 of the speaker module 80. The sound outlet passage 80a is formed in the housing 81 and communicates with the front chamber C1.

The material of the housing 81 includes, but is not limited to, metal, plastic, or a combination of metal and plastic. In some embodiments, the housing 81 is made of plastic, which is low in cost and easy to mold, and is beneficial to reducing the processing cost of the speaker module 80.

The housing 81 may be a unitary structure or may be formed by assembling a plurality of parts. With such an arrangement, the forming difficulty and the assembling difficulty of the housing 81 can be reduced.

The inner core 82 is located within the shell 81. A wire hole (not shown) may be formed in the housing 81, one end of the electrical connection structure 83 extends into the housing 81 through the wire hole to be electrically connected to the core 82, and one end of the electrical connection structure 83 located outside the housing 81 is electrically connected to at least one of the main control motherboard 30 and the interface motherboard 40.

The electrical connection structure 83 includes, but is not limited to, a Flexible Printed Circuit (FPC), a conductive wire, an enamel wire, and a structure formed by connecting a plurality of conductive wires through a flexible structure. In the embodiment shown in fig. 3-4, the electrical connection structure 83 is a flexible circuit board.

The inner core 82, when electrically operated, may push air in the front chamber C1 to vibrate to form sound, thereby converting the audio electrical signal into a sound signal, which may be transmitted to the outside of the housing 81 through the sound outlet passage 80 a. The core 82 is a core component for generating sound in the speaker module 80, and the thickness and audio performance of the core 82 directly affect the thickness and audio performance of the speaker module 80, so the following description mainly describes the structure of the core 82.

Referring to fig. 5 and 6, fig. 5 is a perspective view of a core 82 according to some embodiments of the present application, and fig. 6 is an exploded view of the core 82 according to fig. 5. In this embodiment, the inner core 82 includes a frame 821, a diaphragm group 822, a voice coil 823, and a magnetic circuit 824.

It should be noted that fig. 5-6 only schematically illustrate some components included in the core 82, and the actual shape, actual size, actual position, and actual configuration of these components are not limited by fig. 5-6. The coordinate system in fig. 5 is represented by the same coordinate system as the coordinate system in fig. 3. That is, the orientation relationship of each component in the kernel 82 in fig. 5 in the coordinate system shown in fig. 5 is the same as the orientation relationship of each component in the kernel 82 in the coordinate system shown in fig. 3 when the kernel 82 is applied to the speaker module 80 shown in fig. 3.

The frame 821 serves as a "support backbone" for the inner core 82, supporting the diaphragm assembly 822, the voice coil 823, and securing the magnetic circuit 824. The material of the basin frame 821 includes, but is not limited to, metal, plastic, and a combination thereof.

Referring to fig. 7, fig. 7 is a perspective view of the tub 821 according to fig. 5 to 6. The tub 821 is in a rectangular frame shape. The frame 821 includes first and second opposing

short sides

821a, 821b, and first and second opposing

long sides

821c, 821 d. The first and second

long sides

821c, 821d extend in parallel to the X axis, and the first and second

long sides

821c, 821d are spaced apart from each other in the Y axis direction. The first and second

short sides

821a, 821b extend in parallel to the Y axis, and the first and second

short sides

821a, 821b are arranged at intervals in the X axis direction. The lengths of the first and second

long sides

821c, 821d are greater than the lengths of the first and second

short sides

821a, 821 b. The frame 821 is formed by sequentially connecting and enclosing a first short side portion 821a, a first long side portion 821c, a second short side portion 821b, and a second long side portion 821 d. It is understood that the shape of the frame 821 is not limited to the rectangular frame shape, and the frame 821 may be formed in other shapes, for example, the frame 821 may have a circular frame shape, an oblong frame shape, or an elliptical frame shape.

With continued reference to FIG. 7, the basin stand 821 has opposing top and

bottom surfaces

821e, 821 f. The top surface 821e of the frame 821 refers to a portion that is close to the front chamber C1 when the core 82 is applied to the speaker module 80, and the bottom surface 821f of the frame 821 refers to a portion that is far from the front chamber C1 when the core 82 is applied to the speaker module 80. The top surface 821e and the bottom surface 821f of the bowl frame 821 are both annular surfaces disposed around the circumference of the bowl frame 821.

The frame 821 may be a structural member, which may be integral, and thus, may facilitate increasing the structural strength of the frame 821. Of course, the present application is not limited thereto, and the tub 821 may be assembled by a plurality of parts. Thus, the processing difficulty and the forming difficulty of the basin frame 821 can be reduced. The portions of the frame 821 may be assembled by gluing, snapping, threading, etc.

The diaphragm group 822 is a main body for pushing air in the front cavity C1 of the speaker module 80 to move. When the core 82 shown in fig. 5-6 is applied to the speaker module 80 shown in fig. 3-4, the core 82 separates a rear cavity C2 from a front cavity C1 in the housing 81 of the speaker module 80 by the diaphragm set 822, and the voice coil 8223 and the magnetic circuit system 8224 are both located in the rear cavity C2.

Referring to fig. 8, fig. 8 is a schematic cross-sectional view of the diaphragm set 822 and the frame 821 taken along the line B-B shown in fig. 5. The diaphragm set 822 includes a fixing portion 8221, a corrugated ring 8222 and a dome 8223.

The fixing portion 8221 is formed in a rectangular ring shape. The fixing portion 8221 is laminated and fixed to the top surface 821e of the bowl frame 821. The attachment of the securing portion 8221 to the top surface 821e of the basin frame 821 includes, but is not limited to, gluing, snapping, welding, or screwing.

An outer peripheral edge of the corrugated rim 8222 is connected to an inner peripheral edge of the fixing portion 8221. The cross section of the corrugated ring 8222 is arc-shaped or approximately arc-shaped, and the extending track of the corrugated ring 8222 is in a round corner rectangle shape. The long side extending direction of the extending track of the folded ring 8222 is parallel to the X axis, and the short side extending direction of the extending track of the folded ring 8222 is parallel to the Y axis. The bent ring 8222 is provided to protrude in a direction from the bottom surface 821f of the bowl frame 821 to the top surface 821e of the bowl frame 821, that is, the bent ring 8222 protrudes toward the side toward which the top surface 821e of the bowl frame 821 faces. In this way, the space below the diaphragm group 822 is released, allowing the magnetic circuit 824 located below the diaphragm group 822 to be set to a larger height dimension, thereby increasing the magnetic induction of the core 82 and improving the sensitivity of the core 82. Of course, it is understood that in other embodiments, the corrugated rim 8222 may also be convexly disposed in a direction from the top surface 821e of the tub 821 to the bottom surface 821f of the tub 821, i.e., the corrugated rim 8222 is convexly disposed toward a side toward which the bottom surface 821f of the tub 821 faces. Thereby enabling the inner core 82 to conserve its upper space and thus saving the front chamber C1 space.

The dome 8223 is surrounded by a fold ring 8222. And the dome 8223 has a rectangular flat plate shape. The length direction of the dome 8223 is parallel to the X-axis, the width direction of the dome 8223 is parallel to the Y-axis, and the thickness direction of the dome 8223 is parallel to the Z-axis.

It is understood that the shape of the diaphragm set 822 is not limited thereto, and the shape of the diaphragm set 822 may be adaptively adjusted when the shape of the frame 821 is changed.

In some examples, diaphragm set 822 is an integrally formed piece. That is, the fixing portion 8221, the corrugated portion 8222 and the dome 8223 are an integral structure. By the arrangement, the structural strength of the diaphragm set 822 is improved, the structural stability of the diaphragm set 822 is improved, and the processing technology of the diaphragm set 822 can be simplified. Of course, the application is not limited to this, the fixing portion 8221, the folded ring 8222 and the dome 8223 may also be separate molded pieces, the fixing portion 8221 and the folded ring 8222 may be connected by gluing, and the folded ring 8222 and the dome 8223 may be connected by gluing. The material of the diaphragm set 822 includes, but is not limited to, metal, plastic, plant fiber, and animal fiber.

Referring to fig. 9, fig. 9 is a schematic diagram illustrating the assembly of the diaphragm set 822, the voice coil 823 and the basin frame 821 shown in fig. 5. A voice coil 823 is located in the tub 821, and one end of the voice coil 823 is connected to a surface of the dome 8223 facing the inside of the tub 821. The connection between voice coil 823 and dome 8223 includes, but is not limited to, gluing, snapping, welding, or screwing. The voice coil 823 has a substantially rectangular frame shape. The long side of the voice coil 823 extends in a direction parallel to the X axis, and the short side of the voice coil 823 extends in a direction parallel to the Y axis. The voice coil 823 is used for cooperating with the magnetic circuit 824 to synchronously drive the diaphragm set 822 to vibrate, so as to push the air in the front cavity C1 of the speaker module 80 to move to generate sound. Specifically, the voice coil 823 may be connected to an electric circuit outside the speaker module 80 through the electric connection structure 83, an induced magnetic field may be generated after the voice coil 823 is powered on, the magnetic circuit 824 may respond to the induced magnetic field and apply a driving force to the voice coil 823, and the voice coil 823 is displaced by a magnetic driving action of the magnetic circuit 824, so that the diaphragm group 822 is driven to generate vibration to drive air in the front cavity C1 to vibrate to form sound, and the sound is output by the sound outlet channel 80 a.

Referring to fig. 10 and 11, fig. 10 is a schematic cross-sectional view of the core 82 shown in fig. 5 taken along line B-B; fig. 11 is an exploded view of the magnetic circuit 824 shown in fig. 5. The magnetic circuit 824 is fixed to the bottom surface of the frame 821. The magnetic circuit 824 has an annular magnetic gap 824a, and a portion of the voice coil 823 remote from the diaphragm assembly 822 may extend into the magnetic gap 824a, so that the magnetic circuit 824 and the voice coil 823 cooperate to drive the diaphragm assembly 822 to vibrate synchronously. It is understood that in other embodiments, when the voice coil 823 is a planar voice coil, the voice coil 823 may not extend into the magnetic gap 824 a. The planar voice coil can be manufactured by winding or by printing a circuit.

With continued reference to fig. 10 and 11, the magnetic circuit 824 includes a center magnet 8241, an edge magnet 8242, a first magnetic conductive yoke, and a second magnetic conductive yoke 8245.

The center magnet 8241 is formed in a rectangular flat plate-like structure. Also, the thickness of the central magnet 8241 is equal at each position. The length direction of the central magnet 8241 is parallel to the X-axis, the width direction of the central magnet 8241 is parallel to the Y-axis, and the thickness direction of the central magnet 8241 is parallel to the Z-axis. The central magnet 8241 may be a magnet or a magnetic steel. The center magnet 8241 has a first surface 8241a and a second surface 8241b which are oppositely disposed in a thickness direction thereof. The first surface 8241a faces the diaphragm group 822, and the second surface 8241b faces away from the diaphragm group 822, that is, the second surface 8241b faces the same direction as the bottom surface 821f of the basin stand 821.

The edge magnets 8242 are disposed around a perimeter of the center magnet 8241. The edge magnets 8242 and the center magnet 8241 define therebetween the magnetic gap 824a described above. The edge magnet 8242 may be a magnet or magnetic steel. The side magnets 8242 have a magnetization direction (direction from south pole to north pole, i.e., direction from S pole to N pole) opposite to that of the center magnet 8241. For example, referring to fig. 10, one end of the central magnet 8241 close to the diaphragm group 822 is a south pole (S), one end of the side magnet 8242 far from the diaphragm group 822 is a north pole (N), and one end of the side magnet 8242 close to the diaphragm group 822 is a south pole (S). In this way, a magnetic circuit may be formed between the center magnet 8241 and the side magnet 8242. When the voice coil 823 is energized, the voice coil 823 vibrates the drive diaphragm group 822 by the magnetic field in the magnetic gap 824 a.

Side magnets 8242 include spaced apart first side magnet 8242a, second side magnet 8242b, third side magnet 8242c and fourth side magnet 8242 d. The first side magnet 8242a and the second side magnet 8242b are disposed at opposite sides of the center magnet 8241 in the longitudinal direction, respectively, and the first side magnet 8242a and the second side magnet 8242b are disposed symmetrically with respect to the center magnet 8241. The third and

fourth side magnets

8242c and 8242d are disposed at opposite sides of the center magnet 8241 in the width direction, respectively, and the third and

fourth side magnets

8242c and 8242d are disposed symmetrically with respect to the center magnet 8241. Of course, in other examples, the first side magnet 8242a and the second side magnet 8242b may be disposed at opposite sides of the center magnet 8241 in the width direction, and the third side magnet 8242c and the fourth side magnet 8242d may be disposed at opposite sides of the center magnet 8241 in the length direction, as long as the arrangement direction of the third side magnet 8242c and the fourth side magnet 8242d is perpendicular to the arrangement direction of the first side magnet 8242a and the second side magnet 8242 b. It is understood that the configuration of the side magnets 8242 is not limited thereto, and in other embodiments, the side magnets 8242 may be in a closed loop shape, for example, the side magnets 8242 may be in a rectangular frame shape.

The thickness of the side magnets 8242 is equal everywhere, that is, the thicknesses of the first side magnet 8242a, the second side magnet 8242b, the third side magnet 8242c, and the fourth side magnet 8242d are equal. And the thickness of the side magnet 8242 is equal to that of the center magnet 8241. This arrangement facilitates manufacturing of the magnet assembly, while also facilitating assembly of the magnetic circuit 824.

With continued reference to fig. 10 and 11, the first magnetic permeable yoke includes a first center magnetic permeable yoke 8243 and a first edge magnetic permeable yoke 8244 that are spaced apart.

A first central magnetic yoke 8243 is disposed on the first surface 8241a and is stacked with the central magnet 8241. Specifically, the first central magnetic yoke 8243 may be disposed on the first surface 8241a by gluing, clamping, screwing, or the like. By arranging the first central magnetic yoke 8243 on the first surface 8241a to restrain magnetic lines of force, the magnetic flux strength in the magnetic gap 824a can be increased, and the driving strength of the diaphragm set 822 can be improved.

The first center magnetic yoke 8243 is formed in a rectangular flat plate-like structure. The length direction of the first center magnetic yoke 8243 is parallel to the X axis, the width direction of the first center magnetic yoke 8243 is parallel to the Y axis, and the thickness direction of the first center magnetic yoke 8243 is parallel to the Z axis. In this way, it is possible to facilitate the circumferential extension shape of the first center magnetic yoke 8243 to coincide with the circumferential extension shape of the center magnet 8241, and the circumferential extension size of the first center magnetic yoke 8243 to coincide with the circumferential extension size of the center magnet 8241. The first central magnetic guiding yoke 8243 can be made of laminated silicon steel sheets. The thickness of the first center magnetic conductive yoke 8243 is equal everywhere.

The first edge magnetic yoke 8244 is disposed on the same surface of the side magnet 8242 as the first surface 8241a and is stacked with the side magnet 8242, that is, the first edge magnetic yoke 8244 is stacked on the surface of the side magnet 8242 facing the diaphragm group 822. Specifically, the first edge guide yoke 8244 may be disposed on the surface of the side magnet 8242 facing the diaphragm group 822 by means of gluing, clamping, screwing, or the like.

In the embodiment of the application, magnetic lines of force may be constrained by the first edge magnetic yoke 8244, so as to increase the magnetic flux strength in the magnetic gap 824a, and improve the driving strength for the diaphragm set 822.

The surface of the first edge magnetic yoke 8244 facing away from the edge magnet 8242 is fixedly attached to the bottom surface 821f of the basin stand 821. Specifically, the first edge magnetic yoke 8244 can be attached to the bottom surface 821f of the basin frame 821 by gluing, clamping, screwing, or the like.

First edge yoke 8244 is positioned at the outer periphery of first center yoke 8243 and is spaced from first center yoke 8243, which forms an insertion opening for voice coil 823 to be inserted into magnetic gap 824 a. The first edge magnetic yoke 8244 can be made of silicon steel sheets.

The shape of the first edge magnetic yoke 8244 can be adapted to the shape of the edge magnet 8242. Specifically, the first edge magnetic yoke 8244 comprises a first sub-edge magnetic yoke 8244a, a second sub-edge magnetic yoke 8244b, a third sub-edge magnetic yoke 8244c and a fourth sub-edge magnetic yoke 8244 d. First sub-edge magnetic yoke 8244a is compatible with first side magnet 8242a, second sub-edge magnetic yoke 8244b is compatible with second side magnet 8242b, third sub-edge magnetic yoke 8244c is compatible with third side magnet 8242c, and fourth sub-edge magnetic yoke 8244d is compatible with fourth side magnet 8242 d. In other examples, when the edge magnet 8242 is formed in a closed ring shape, the first edge magnetic yoke 8244 may also be formed in a closed ring shape that fits the edge magnet 8242.

With continued reference to fig. 10, the thickness of the first edge magnetic yoke 8244 is equal everywhere, and the thickness of the first edge magnetic yoke 8244 is equal to the thickness of the first center magnetic yoke 8243.

With continued reference to fig. 10 and 11, the second magnetic conductive yoke 8245 includes a second center magnetic conductive yoke 82452 and a second edge magnetic conductive yoke 82451.

A second central magnetic yoke 82452 is disposed on the second surface 8241b and is stacked with the central magnet 8241. Specifically, the second central magnetic conductive yoke 82452 may be disposed on the second surface 8241b by gluing, clamping, screwing, or the like. By arranging the second central magnetic yoke 82452, magnetic lines of force can be constrained by the second central magnetic yoke 82452, so that the magnetic flow strength is increased, and the driving strength of the diaphragm set 822 is improved.

The second center magnetic conductive yoke 82452 is formed in a rectangular flat plate-like structure, a length direction of the second center magnetic conductive yoke 82452 is parallel to the X axis, a width direction of the second center magnetic conductive yoke 82452 is parallel to the Y axis, and a thickness direction of the second center magnetic conductive yoke 82452 is parallel to the Z axis, so that a circumferentially extending shape of the second center magnetic conductive yoke 82452 coincides with a circumferentially extending shape of the center magnet 8241, and a circumferentially extending size of the second center magnetic conductive yoke 82452 coincides with a circumferentially extending size of the center magnet 8241. The second central magnetic guiding yoke 82452 can be made of laminated silicon steel sheets. The thickness of the second central magnetic conductive yoke 82452 is equal everywhere.

A second edge magnetic conductive yoke 82451 is provided on the same side surface of the side magnet 8242 as the second surface 8241b, that is, the second edge magnetic conductive yoke 82451 is provided on the surface of the side magnet 8242 facing away from the diaphragm group 822. The second edge magnetic yoke 82451 may be disposed on the surface of the side magnet 8242 facing away from the diaphragm assembly 822 by gluing, clamping, screwing, or the like. By restricting the magnetic lines of force by the second edge magnetic yoke 82451, the magnetic flux strength in the magnetic gap 824a can be increased, and the driving strength for the diaphragm group 822 can be improved.

The second edge magnetic yoke 82451 may be formed in a rectangular ring shape. The second edge magnetic yoke 82451 is located at the outer periphery of the second center magnetic yoke 82452. The second edge magnetic guiding yoke 82451 may be made of stacked silicon steel sheets. The thickness of the second edge magnetic yoke 82451 is equal everywhere.

Specifically, to further increase the magnetic flux strength, the second magnetic yoke 8245 may further include a connecting yoke portion 82453, the connecting yoke portion 82453 is connected between the outer circumference of the second center yoke 82452 and the inner circumference of the second edge yoke 82451, and the connecting yoke portion 82453 is opposite to the magnetic gap 824 a. In this way, the end of the magnetic gap 824a remote from the diaphragm group 822 can be closed by the coupling yoke portion 82453. The material of the connecting yoke portion 82453 may be a yoke made of stacked silicon steel sheets. Of course, in other embodiments, the second magnetic conductive yoke 8245 may not include the connecting yoke portion 82453.

In order to improve the structural strength of the second magnetic conductive yoke 8245 and simplify the processing technology of the second magnetic conductive yoke 8245, the second edge magnetic conductive yoke 82451, the connecting yoke portion 82453 and the second center magnetic conductive yoke 82452 are integrally formed, that is, the second magnetic conductive yoke 8245 is integrally formed. Of course, the present application is not limited thereto, and in other embodiments, the connection between the second edge magnetic yoke 82451 and the connecting yoke portion 82453 and the connection between the connecting yoke portion 82453 and the second center magnetic yoke 82452 include, but are not limited to, snap-fit, adhesive, or screw connection.

With continued reference to fig. 10, the second magnetic conductive yoke 8245 has an equal thickness everywhere, that is, the connecting yoke portion 82453, the second center magnetic conductive yoke 82452 and the second edge magnetic conductive yoke 82451 have an equal thickness.

Magnetic lines of force emitted due to the N-pole of the center magnet 8241 and the N-pole of the side magnet 8242 are mainly transmitted between the voice coil 823 and the magnets (i.e., the center magnet 8241 and the side magnet 8242) via the magnetic yokes (i.e., the first and second magnetic yokes 8245). Referring to fig. 12, fig. 12 is a schematic diagram illustrating magnetic flux emission from the inner core 82 shown in fig. 5-6. As shown in fig. 12, when the first center magnetic yoke 8243 having a uniform thickness and the second center magnetic yoke 82452 having a uniform thickness are used for magnetic conduction, the number of magnetic lines of force transmitted from the first center magnetic yoke 8243 and the second center magnetic yoke 82452 to be involved in driving of the voice coil 823 is larger at a position closer to the voice coil 823, and the number of magnetic lines of force transmitted from the first center magnetic yoke 8243 and the second center magnetic yoke 82452 to be involved in driving of the voice coil 823 is smaller at a position farther from the voice coil 823. Therefore, in the above embodiment, the magnetic saturation levels of the central portions of the first and second center

magnetic yokes

8243 and 82452 are lower than those of the portions thereof near the voice coil 823, the magnetic permeability of the central portions of the first and second center

magnetic yokes

8243 and 82452 is excessive, and the magnetic permeability efficiency of the first and second center

magnetic yokes

8243 and 82452 as a whole is low. Furthermore, the first center magnetic yoke 8243 and the second center magnetic yoke 82452 having equal thickness are not beneficial to further increase the thickness of the center magnet 8241 without changing the external dimension of the magnetic circuit 824. The unreasonable design of the conventional magnetic circuit 824 is not favorable for increasing the driving force of the magnetic circuit 824 without increasing the overall size of the magnetic circuit 824.

In addition, since the magnetic lines of force follow the principle of forming the shortest magnetic circuit, the outer peripheral end portion of the side magnet 8242 away from the center magnet 8241 inevitably emits some magnetic lines of force that do not participate in the driving of the voice coil 823. Although the first edge magnetic yoke 8244 and the second edge magnetic yoke 82451 are provided on both sides of the side magnet 8242 in the thickness direction, as shown in fig. 12, these ineffective magnetic lines of force are not conducted to the voice coil 823 by the first edge magnetic yoke 8244 and the second edge magnetic yoke 82451, that is, the outer peripheral end portion of the first edge magnetic yoke 8244 and the outer peripheral end portion of the second edge magnetic yoke 82451 are failure regions in which the transmission of the magnetic lines of force is disabled, which not only reduces the overall magnetic conductive efficiency of the first edge magnetic yoke 8244 and the second edge magnetic yoke 82451. Moreover, the design of the first edge magnetic yoke 8244 and the second edge magnetic yoke 82451 with equal thickness is not beneficial to designing the thickness of the edge magnet 8242 to be larger on the premise of not changing the external dimension of the edge magnetic circuit 824, and the design of the magnetic circuit 824 is not reasonable, so that the driving force of the magnetic circuit 824 is not beneficial to be improved on the premise of not increasing the external dimension of the magnetic circuit 824.

In short, the unreasonable design of the magnetic circuit 824 in the above embodiments is not favorable for increasing the driving force of the magnetic circuit 824 without increasing the external dimension of the magnetic circuit 824.

In order to solve the above technical problem, structures of the magnetic circuit 824 in different examples are given below, so that the structure of the magnetic circuit 824 can be designed more reasonably without changing the overall dimension of the magnetic circuit 824, and the magnetic induction intensity of the magnetic circuit 824 can be improved, and then the driving force of the magnetic circuit 824 to the voice coil 823 can be improved, so that it is beneficial to ensuring that the speaker module 80 has both the thinning and the audio effect, and further ensuring that the electronic device 100 has both the thinning and the audio effect.

Example one

Referring to fig. 13, 14 and 15, fig. 13 is a schematic structural diagram of a magnetic circuit 824 according to another embodiment of the present application; FIG. 14 is a schematic cross-sectional exploded view of the magnetic circuit 824 of FIG. 13 taken along line C-C; fig. 15 is a cross-sectional mating structure diagram of the magnetic circuit 824 shown in fig. 13 at the C-C line. The present embodiment differs from the magnetic circuit 824 shown in fig. 5-6 described above in that:

a first recess 82431 is formed in a middle portion of the first center magnetic yoke 8243 facing the first surface 8241a, a first protrusion 8241a1 is provided on the first surface 8241a, and the first protrusion 8241a1 is fitted in the first recess 82431. Therefore, the first groove 82431 is formed in the middle of the first center magnetic conducting yoke 8243 facing the first surface 8241a, so that the thickness of the first center magnetic conducting yoke 8243 in the first groove 82431 is reduced, the problem of surplus magnetic permeability in the middle of the first center magnetic conducting yoke 8243 is solved at least to a certain extent, and the magnetic permeability in the middle of the first center magnetic conducting yoke 8243 and the magnetic saturation of the first center magnetic conducting yoke 8243 corresponding to the first groove 82431 are improved. In addition, the arrangement of the first groove 82431 also provides an avoidance space for the arrangement of the first protrusion 8241a1, so that the overall thickness of the first protrusion 8241a1 and the central magnet 8241 is increased, and thus the magnetic flux of the magnetic circuit 824 is increased on the premise of not changing the overall dimension of the magnetic circuit 824, the driving force of the magnetic circuit 824 on the voice coil 823 is increased, the loudspeaker module 80 can have larger amplitude, and the low-frequency performance and the external radiation performance of the loudspeaker module 80 are optimized.

A side surface of the first center magnetic yoke 8243 facing away from the first surface 8241a is a plane parallel to the first surface 8241 a. In this way, the thickness of the first central magnetic conductive yoke 8243 at the first groove 82431 is smaller than the thickness of the first central magnetic conductive yoke 8243 at the position where the first groove 82431 is not formed, so that the problem of surplus magnetic conductive capability in the middle of the first central magnetic conductive yoke 8243 can be solved, and the magnetic conductive efficiency in the middle of the first central magnetic conductive yoke 8243 and the magnetic saturation degree of the first central magnetic conductive yoke 8243 corresponding to the first groove 82431 are improved. Of course, the present application is not limited thereto, and in other embodiments, the thickness of the first center magnetic conductive yoke 8243 is equal everywhere as long as the first recess 82431 is provided on the surface of the first center magnetic conductive yoke 8243 facing the first surface 8241 a.

In order to further improve the uniformity of the magnetic saturation level on the first center magnetic yoke 8243, so as to facilitate more magnetic lines of force to be transmitted between the voice coil 823 and the magnet, and thus improve the magnetic induction strength of the magnetic circuit system 824, the distance between the wall surface of the first recess 82431 and the first surface 8241a is gradually reduced in the direction from the center of the first center magnetic yoke 8243 to the outer periphery of the first center magnetic yoke 8243. Specifically, a distance between a wall surface of the first recess 82431 and the first surface 8241a may be non-linearly tapered in a direction from a center of the first center magnetic yoke 8243 to an outer circumference of the first center magnetic yoke 8243. Illustratively, the wall surface of the first recess 82431 is a spherical crown surface, and the first protrusion 8241a1 is a spherical segment. Also illustratively, the wall surface of the first recess 82431 is an ellipsoid, and the surface of the first protrusion 8241a1 is an ellipsoid. Specifically, a distance between a wall surface of the first recess 82431 and the first surface 8241a may be linearly tapered in a direction from a center of the first center magnetic yoke 8243 to an outer circumference of the first center magnetic yoke 8243. Further illustratively, the wall surface of the first recess 82431 has a tapered surface, and the first protrusion 8241a1 has a tapered shape. Of course, the present application is not limited thereto, and in other embodiments, the shape of the wall surface of the first recess 82431 may also be stepped.

In order to improve the coupling strength of the first protrusion 8241a1 and the central magnet 8241, the first protrusion 8241a1 and the central magnet 8241 may be an integrally formed member. Of course, the present application is not limited thereto, and the first protrusion 8241a1 and the central magnet 8241 may be connected by gluing, clipping, or screwing.

With reference to fig. 14 and 15, a second notch 824521 is formed in a middle portion of the second central magnetic yoke 82452 facing the second surface 8241b, a second protrusion 8241b1 is disposed on the second surface 8241b, and the second protrusion 8241b1 is fitted in the second notch 824521. Therefore, the second groove 824521 is formed in the middle of the second center magnetic yoke 82452 facing the second surface 8241b, which is beneficial to reducing the thickness of the second center magnetic yoke 82452 at the second groove 824521, so that the problem of surplus magnetic permeability in the middle of the second center magnetic yoke 82452 is solved at least to a certain extent, and the magnetic permeability in the middle of the second center magnetic yoke 82452 and the magnetic saturation of the second center magnetic yoke 82452 corresponding to the second groove 824521 are improved. Moreover, the arrangement of the second groove 824521 also provides an avoidance space for the arrangement of the second protrusion 8241b1, so that the overall thickness of the first protrusion 8241a1, the second protrusion 8241b1 and the central magnet 8241 is further increased, and on the premise that the overall size of the magnetic circuit 824 is not changed, the magnetic flux of the magnetic circuit 824 is increased, the driving force of the magnetic circuit 824 on the voice coil 823 is increased, and further the speaker module 80 has larger amplitude, and the low-frequency performance and the external radiation performance of the speaker module 80 are optimized.

According to the inner core 82 of the embodiment of the present application, by providing the first recess 82431 on the first center magnetic yoke 8243, providing the second recess 824521 on the second center magnetic yoke 82452, and providing the first protrusion 8241a1 adapted to the first recess 82431 and the second protrusion 8241b1 adapted to the second recess 824521 on the center magnet 8241, respectively, it is beneficial to increase the overall thickness of the center magnet 8241, the first protrusion 8241a1 and the second protrusion 8241b1 without changing the thickness of the magnetic circuit 824, thereby increasing the magnetic flux of the magnetic circuit 824, increasing the driving force of the magnetic circuit 824 to the voice coil 823, making the speaker module 80 have a larger amplitude, and optimizing the audio performance of the speaker module 80. In addition, still be favorable to reducing the thickness of first center magnetic yoke 8243 and second center magnetic yoke 82452 middle part department to be favorable to solving the surplus problem of magnetic permeability in the middle part of first center magnetic yoke 8243 and second center magnetic yoke 82452 to a certain extent at least, improve the magnetic permeability efficiency in the middle part of first center magnetic yoke 8243 and second center magnetic yoke 82452.

Of course, the present application is not limited thereto, and in other examples, the first recess 82431 may be disposed on the first center magnet yoke 8243 and the first protrusion 8241a1 may be disposed on the first surface 8241a of the center magnet 8241, while the second recess 824521 may not be disposed on the second center magnet yoke 82452 and the second protrusion 8241b1 may not be disposed on the second surface 8241b of the center magnet 8241. Alternatively, the first recess 82431 is not provided on the first center magnet 8243 and the first protrusion 8241a1 is not provided on the first surface 8241a of the center magnet 8241, the second recess 824521 is provided on the second center magnet 82452 and the second protrusion 8241b1 is provided on the second surface 8241b of the center magnet 8241.

A side surface of the second center magnetic yoke 82452 facing away from the second surface 8241b is a plane parallel to the second surface 8241 b. In this way, the thickness of the second center magnetic yoke 82452 at the second groove 824521 is smaller than the thickness of the second center magnetic yoke 82452 without the second groove 824521, so that the problem of excessive magnetic permeability in the middle of the second center magnetic yoke 82452 can be solved, and the magnetic permeability in the middle of the second center magnetic yoke 82452 and the magnetic saturation degree of the second center magnetic yoke 82452 corresponding to the second groove 824521 are improved. Of course, the present application is not limited thereto, and in other embodiments, the thickness of the second center magnetic yoke 82452 is equal everywhere as long as the second groove 824521 is ensured on the surface of the second center magnetic yoke 82452 facing the second surface 8241 b.

In order to further improve the uniformity of the degree of magnetic saturation in the second center magnetic yoke 82452 so that more magnetic lines of force are transmitted between the voice coil 823 and the magnet, the distance between the wall surface of the second recess 824521 and the second surface 8241b is gradually reduced in the direction from the center of the second center magnetic yoke 82452 to the outer periphery of the second center magnetic yoke 82452. Specifically, the distance between the wall surface of the second groove 824521 and the second surface 8241b decreases in a non-linear manner in the direction from the center of the second center yoke 82452 to the outer periphery of the second center yoke 82452. Illustratively, the wall surface of the second groove 824521 is a spherical crown surface, and the second protrusion 8241b1 is a spherical segment. As another example, the wall surface of the second groove 824521 is an ellipsoid, and the surface of the second protrusion 8241b1 is an ellipsoid. Specifically, the distance between the wall surface of the second recess 824521 and the second surface 8241b is linearly tapered in a direction from the center of the second center yoke 82452 to the outer periphery of the second center yoke 82452. Also illustratively, the wall surface of the second groove 824521 is a tapered surface, and the second protrusion 8241b1 is a tapered surface. Of course, the application is not limited thereto, and in other embodiments, the shape of the wall surface of the second groove 824521 may also be stepped.

In order to improve the coupling strength of the second protrusion 8241b1 and the center magnet 8241, the second protrusion 8241b1 and the center magnet 8241 may be an integrally formed member. Of course, the present application is not limited thereto, and the second protrusion 8241b1 and the central magnet 8241 may be connected by gluing, clipping, or screwing.

The shape of the second protrusion 8241b1 is the same as the shape and size of the first protrusion 8241a 1. Illustratively, the second protrusion 8241b1 is symmetrically disposed with respect to the central magnet 8241 with respect to the first protrusion 8241a 1.

In addition to the above embodiments, with continued reference to fig. 14 and 15, a surface of the first edge magnetic yoke 8244 facing the edge magnet 8242 is formed with a first mating region H. The first fitting region H includes a first region H1 and a second region H2. An end of the first region H1 proximate the first center magnetic conductive yoke 8243 extends to a side edge of the first edge magnetic conductive yoke 8244 proximate the first center magnetic conductive yoke 8243. The second region H2 is located on a side of the first region H1 that is remote from the first center magnetic yoke 8243. And the second region H2 extends to a side edge of the first edge yoke 8244 that is distal from the first center yoke 8243. The distance between the second region H2 and the plane of central magnet 8241 is greater than the distance between the first region H1 and the plane X of central magnet 8241, i.e. the second region H2 is further away from the plane X of central magnet 8241 than the first region H1.

A surface of the edge magnet 8242 facing the first edge magnetic yoke 8244 is formed with a first accommodation region G. The first adaptation region G includes a first sub adaptation region G1 and a second sub adaptation region G2. The second sub-accommodation region G2 is located on a side of the first sub-accommodation region G1 away from the central magnet 8241. The distance between the second sub-accommodation region G2 and the plane of the central magnet 8241 is greater than the distance between the first sub-accommodation region G1 and the plane of the central magnet 8241. In this way, the second sub-accommodating section G2 may be adapted to the second section H2 and the first sub-accommodating section G1 may be adapted to the first section H1 to facilitate the adaptation of the first adapted section G to the first mating section H to facilitate the adaptation of the side surface of the edge magnet 8242 facing the first edge magnetic yoke 8244 to the surface of the first edge magnetic yoke 8244 facing the edge magnet 8242.

In the embodiment of the present application, by providing the second region H2 on the surface of the first edge magnetic yoke 8244 facing the edge magnet 8242, the distance between the second region H2 and the plane in which the center magnet 8241 is located is larger than the distance between the first region H1 and the plane in which the center magnet 8241 is located. In this way, the second region H2 can avoid the second sub adaptation region G2, so as to facilitate the arrangement of the second sub adaptation region G2 on the side magnet 8242, thereby increasing the thickness of the side magnet 8242 corresponding to the second sub adaptation region G2, further facilitating more magnetic lines of force on the side magnet 8242 corresponding to the second adaptation region K to participate in the driving of the voice coil 823, improving the magnetic induction intensity of the magnetic circuit 824, and improving the driving force of the magnetic circuit 824 on the voice coil 823.

Here, it is understood that the plane X in which the central magnet 8241 is located means that the plane X is parallel to both the first surface 8241a and the second surface 8241b, and the plane X passes through the center of the central magnet 8241.

Specifically, the surface of the first edge magnet yoke 8244 on the side facing away from the edge magnet 8242 is parallel to the plane in which the center magnet 8241 lies. As such, the thickness of the first edge magnetic yoke 8244 at the first region H1 is greater than the thickness of the first edge magnetic yoke 8244 at the second region H2. Therefore, on the premise of not changing the external dimension of the magnetic circuit 824, the thickness of the failure region on the first edge magnetic yoke 8244 is reduced, so that the magnetic conduction efficiency of the first edge magnetic yoke 8244 is improved, meanwhile, the purpose of increasing the thickness of the edge magnet 8242 at the second sub-adaptation region K2 is achieved, more magnetic lines of force corresponding to the second sub-adaptation region K2 on the edge magnet 8242 can participate in the driving of the voice coil 823, the magnetic induction intensity of the magnetic circuit 824 is improved, and the driving force of the magnetic circuit 824 on the voice coil 823 is improved. Of course, the present application is not limited thereto, and in other embodiments, the thickness of the first edge magnetic yoke 8244 may also be the same as long as the first mating region H is ensured to be provided on the first edge magnetic yoke 8244.

Specifically, a surface of the first edge magnetic yoke 8244 facing away from the edge magnets 8242 is coplanar with a surface of the first center magnetic yoke 8243 facing away from the center magnet 8241. By the arrangement, the structure compactness of the magnetic circuit 824 is improved, the structural layout of the magnetic circuit 824 is more reasonable, and the driving force of the magnetic circuit 824 to the voice coil 823 is improved.

Specifically, with continued reference to FIGS. 14 and 15, in the arrangement direction of the first region H1 and the second region H2, the width dimension of the first region is d, the thickness dimension of the first edge magnetic yoke 8244 corresponding to the first region H1 is H, and d and H satisfy that d is greater than or equal to 0.5H. Illustratively, d can be 0.8h, 1h, 1.2h, 1.5h, 1.7h, 1.9h, 2h, 2.3h, 2.5h, 2.8h, 3h, 3.2h, 3.5h, 3.7h, 4h, 4.2h, 4.5h, or 5 h. In this way, the width of the first region H1 and the thickness of the first region H1 of the first edge magnetic yoke 8244 are combined to optimize the structure of the first edge magnetic yoke 8244 and improve the magnetic permeability of the first edge magnetic yoke 8244. Specifically, the width of the first sub-adaptation region G1 is equal to the width of the first region H1.

Specifically, with continued reference to fig. 14 and 15, the second region H2 extends obliquely from the first region H1 in a direction away from the plane X in which the center magnet 8241 lies, in a direction from the center of the first center magnetic yoke 8243 to the outer periphery of the first center magnetic yoke 8243. With such an arrangement, the second sub adaptation region G2 can extend obliquely from the first sub adaptation region G1 toward the direction away from the plane where the center magnet 8241 is located, which is beneficial to utilizing the change of the shape of the side magnet 8242, so that more magnetic lines of force on the side magnet 8242 corresponding to the second sub adaptation region K2 participate in the driving of the voice coil 823, the magnetic induction intensity of the magnetic circuit 824 is increased, and the driving force of the magnetic circuit 824 on the voice coil 823 is increased. Specifically, the second region H2 may be an inclined plane or a curved surface, wherein the curved surface includes, but is not limited to, an elliptical arc surface or a circular arc surface. Of course, the present application is not limited thereto, and in other examples, the second region H2 may also be formed as a stepped surface; alternatively, the second region H2 is parallel to the plane X in which the central magnet 8241 lies, so that the second region H2 can form a step with the first region H1.

Specifically, the first region H1 is a plane parallel to the plane X in which the center magnet 8241 is located. Of course, the present application is not limited thereto, and in other examples, the first region H1 may also be a slope inclined with respect to the plane X in which the center magnet 8241 is located. As long as the thickness of the first edge magnetic yoke 8244 at the position of the first region H1 is ensured to be larger than the thickness of the second region H2 at the position of the first edge magnetic yoke 8244.

Referring to fig. 16, fig. 16 is a schematic structural diagram of the first edge magnetic yoke 8244 shown in fig. 13. The first sub-edge yoke 8244a of the first edge yoke 8244 has a first mating region H formed thereon. Specifically, an avoiding notch 8244aa is formed at each end of the first sub-edge magnetic yoke 8244a in the Y-axis direction, and the avoiding notch 8244aa extends to a side edge of the first sub-edge magnetic yoke 8244a away from the second sub-edge magnetic yoke 8244 b. The relief notch 8244aa is used to relieve the electrical connector described in detail below. Along the Y-axis direction, the first mating region H on the first sub-edge yoke 8244a is located between two relief notches 8244 aa.

Specifically, the first sub-edge magnetic yoke 8244a includes a first portion 8244a1, a second portion 8244a2 and a third portion 8244a 3. The first portion 8244a1, the second portion 8244a2 and the third portion 8244a3 are arranged in this order along the Y-axis direction and connected, and the surface of the second portion 8244a2 facing the edge magnet 8242 is formed as a first fitting region H. An end of the second portion 8244a2 distal from the first center magnetic yoke 8243 extends beyond the first portion 8244a1 in a direction distal from the first center magnetic yoke 8243 to define an escape notch 8244aa with the first portion 8244a 1. An end of the second portion 8244a2 distal from the first center magnetic yoke 8243 extends beyond the third portion 8244a3 in a direction distal from the first center magnetic yoke 8243 to define another relief notch 8244aa with the third portion 8244a 3. A side surface of the third portion 8244a3 facing the first side magnet 8242a, a side surface of the first portion 8244a1 facing the first side magnet 8242a are coplanar with the first region H1 on the second portion 8244a 2.

Thus, the structure of the first sub-edge magnetic yoke 8244a can be simplified, the processing efficiency of the first sub-edge magnetic yoke 8244a can be improved, the manufacturing cost of the first sub-edge magnetic yoke 8244a can be reduced, and the manufacturing cost of the magnetic circuit system 824 can be reduced.

Of course, the present application is not limited thereto, and in other examples, to further simplify the structure of the first sub-edge magnetic yoke 8244a, the first sub-edge magnetic yoke 8244a may not include the first portion 8244a1 and the third portion 8244a 3.

With continued reference to fig. 16, the second sub-edge magnetic yoke 8244b has a first mating region H formed thereon. Specifically, the second sub-edge magnetic yoke 8244b and the first sub-edge magnetic yoke 8244a have the same structure, and thus, the detailed description thereof is omitted. Since the second sub-edge magnetic yoke 8244b and the first sub-edge magnetic yoke 8244a are respectively located at two opposite sides of the first center magnetic yoke 8243, the magnetic circuit 824 can be arranged to be symmetrical with respect to the voice coil 823 by arranging the first fitting region H on the second sub-edge magnetic yoke 8244b, so that the same driving force is applied to two ends of the voice coil 823 in the X-axis direction, and the rolling vibration problem of the diaphragm group 822 can be prevented.

With continued reference to fig. 16, the entire surface of the third sub-edge magnetic yoke 8244c facing the third side magnet 8242c is formed as a first mating region H. The fourth sub-edge magnetic yoke 8244c has the same structure as the third sub-edge magnetic yoke 8244 c. Because the third sub-edge magnetic yoke 8244c and the fourth sub-edge magnetic yoke 8244d are respectively located at the other two opposite sides of the first center magnetic yoke 8243, the magnetic circuit 824 can be set to be symmetrical with respect to the voice coil 823 by setting the first matching regions H on the fourth sub-edge magnetic yoke 8244d and the third sub-edge magnetic yoke 8244c, so that the same driving force is applied to the two ends of the voice coil 823 in the Y-axis direction, and the problem of rolling vibration of the diaphragm group 822 is prevented. Of course, the present application is not limited thereto, and in other embodiments, the first fitting region H may be provided only on a partial surface of the third sub-edge magnetic yoke 8244c facing the third side magnet 8242c and a partial surface of the fourth sub-edge magnetic yoke 8244d facing the fourth side magnet 8242 d.

In other embodiments of the present application, the first mating region H may be disposed only on the first sub-edge magnetic yoke 8244a and the second sub-edge magnetic yoke 8244b, and not disposed on the third sub-edge magnetic yoke 8244c and the fourth sub-edge magnetic yoke 8244 d; alternatively, the first mating region H is provided in the third sub-edge magnetic yoke 8244c and the fourth sub-edge magnetic yoke 8244d, and the first mating region H is not provided in the first sub-edge magnetic yoke 8244a and the second sub-edge magnetic yoke 8244 b.

Referring to fig. 17 and 18, fig. 17 is a schematic view of a structure of the edge magnet 8242 shown in fig. 13, and fig. 18 is a schematic view of the edge magnet 8242 and the first edge magnetic yoke 8244 shown in fig. 13 in cooperation. Escape regions 8242aa are formed at both ends of the surface of the first side magnet 8242a facing the first sub-edge magnetic yoke 8244a in the Y axis direction. The escape region 8242aa penetrates the first side magnet 8242a in the X-axis direction. Along the Y-axis direction, the first compliant region G on the first side magnet 8242a is located between two avoidance regions 8242 aa.

Specifically, the first side magnet 8242a includes a first magnet portion 8242a1, a second magnet portion 8242a2, and a third magnet portion 8242a 3. The first magnet portion 8242a1, the second magnet portion 8242a2 and the third magnet portion 8242a3 are arranged in this order along the Y-axis direction and connected. The surface of the second magnet portion 8242a2 facing the edge magnet 8242 is formed with a first accommodation region G. A side surface of third magnet portion 8242a3 facing first sub-edge magnetic permeable yoke 8244a and a side surface of first magnet portion 8242a1 facing first sub-edge magnetic permeable yoke 8244a are each formed as an offset region 8242 aa. The bypass region 8242aa is coplanar with the first sub-accommodation region G1 on the second magnet portion 8242a2 to facilitate the first side magnet 8242a to fit within the first sub-edge magnetic yoke 8244 aa.

With continued reference to fig. 18, the first portion 8244a1 cooperates with the first magnet portion 8242a1, and the first portion 8244a1 covers a portion of the bypass region 8242aa of the first magnet portion 8242a1, and the remaining portion of the bypass region 8242aa of the first magnet portion 8242a1 and the corresponding bypass notch 8244aa can form a bypass space M. The third portion 8244a3 cooperates with the third magnet portion 8242a3, and the third portion 8244a3 covers a portion of the bypass region 8242aa on the third magnet portion 8242a3, and the remaining portion of the bypass region 8242aa on the third magnet portion 8242a3 and the corresponding bypass notch 8244aa may form another bypass space M. The avoidance space M is used to avoid an electric connector 825 mentioned later. The structure of the second side magnet 8242b is the same as that of the first side magnet 8242a, and thus, the description thereof is omitted.

With reference to fig. 17, a first adaptive region G is formed on a surface of the third side magnet 8242c facing the third sub-edge magnetic yoke 8244c, and the first adaptive region G extends to two ends of the third side magnet 8242c along the X-axis direction so as to be adapted to the first matching region H on the third sub-edge magnetic yoke 8244 c. The fourth side magnet 8242d has the same structure as the third side magnet 8242c, and thus, description thereof is omitted.

On the basis of the above embodiment, referring back to fig. 14 and 15, the surface of the second edge magnetic yoke 82451 facing the edge magnet 8242 is formed with the second fitting region J including the third region J1 and the fourth region J2. An end of the third region J1 near the second center yoke 82452 extends to a side edge of the second edge yoke 82451 near the second center yoke 82452. The fourth region J2 is located on a side of the third region J1 away from the second central magnetic yoke 82452. And the fourth region J2 extends to a side edge of the second edge magnetic yoke 82451 that is distal from the second center magnetic yoke 82452. The distance between the fourth region J2 and the plane X on which the central magnet 8241 is located is greater than the distance between the third region J1 and the plane X on which the central magnet 8241 is located, that is, the fourth region J2 is farther from the plane X on which the central magnet 8241 is located than the third region J1.

A surface of the side magnet 8242 facing the second edge magnetic yoke 82451 is formed with a second accommodation region K. The second adaptation region K includes a third sub adaptation region K1 and a fourth sub adaptation region K2. The fourth sub accommodation region K2 is located on the side of the third sub accommodation region K1 away from the central magnet 8241. The distance between the fourth sub-accommodation region K2 and the plane X in which the central magnet 8241 is located is greater than the distance between the third sub-accommodation region K1 and the plane X in which the central magnet 8241 is located. In this way, the fourth sub accommodation region K2 may be adapted to the fourth region J2, and the third sub accommodation region K1 may be adapted to the third region J1, thereby facilitating the second accommodation region K to be adapted to the second fitting region J, so as to facilitate the side surface of the side magnet 8242 facing the second edge guide yoke 82451 to be adapted to the surface of the second edge guide yoke 82451 facing the side magnet 8242.

In the embodiment of the present application, by providing the fourth region J2 on the surface of the second edge magnetic yoke 82451 facing the side magnet 8242, the distance between the fourth region J2 and the plane X on which the center magnet 8241 is located is larger than the distance between the third region J1 and the plane X on which the center magnet 8241 is located. In this way, the fourth region J2 can avoid the fourth sub adaptation region K2, so as to facilitate the arrangement of the fourth sub adaptation region K2 on the side magnet 8242, thereby increasing the thickness of the side magnet 8242 corresponding to the fourth sub adaptation region K2, and further facilitating more magnetic lines of force on the side magnet 8242 corresponding to the fourth sub adaptation region K2 to participate in the driving of the voice coil 823, thereby improving the magnetic induction intensity of the magnetic circuit 824 and improving the driving force of the magnetic circuit 824 on the voice coil 823.

Specifically, the surface of the second edge magnet yoke 82451 facing away from the edge magnet 8242 is parallel to the plane in which the center magnet 8241 lies. Thus, the thickness of the second edge magnetic yoke 82451 at the third region J1 is greater than the thickness of the second edge magnetic yoke 82451 at the fourth region J2. Therefore, on the premise of not changing the overall dimension of the magnetic circuit system 824, the magnetic conduction efficiency of the second edge magnetic yoke 82451 is improved by reducing the thickness of the failure region on the second edge magnetic yoke 82451, and meanwhile, the purpose of increasing the thickness of the edge magnet 8242 at the fourth sub-adaptation region K2 is achieved, more magnetic lines of force corresponding to the fourth sub-adaptation region K2 on the edge magnet 8242 can participate in the driving of the voice coil 823, the magnetic induction strength of the magnetic circuit system 824 is improved, and the driving force of the magnetic circuit system 824 on the voice coil 823 is improved. Of course, the present application is not limited thereto, and in other embodiments, the thickness of the second edge magnetic yoke 82451 may also be the same as long as the second fitting region J is ensured to be provided on the second edge magnetic yoke 82451.

Specifically, a side surface of the second edge magnet yoke 82451 facing away from the edge magnets 8242 is coplanar with a side surface of the second center magnet yoke 82452 facing away from the center magnet 8241. With such an arrangement, the magnetic circuit 824 is more compact in structure, and the magnetic circuit 824 is more reasonable in structural layout, which is beneficial to improving the driving force of the magnetic circuit 824 to the voice coil 823.

Specifically, with continued reference to fig. 14 and 15, in the arrangement direction of the third region J1 and the fourth region J2, the width dimension of the third region is m, the thickness dimension of the second edge magnetic yoke 82451 corresponding to the third region J1 is n, and m and n satisfy that m ≧ 0.5 n. Illustratively, m can be 0.8n, 1n, 1.2n, 1.5n, 1.7n, 1.9n, 2n, 2.3n, 2.5n, 2.8n, 3n, 3.2n, 3.5n, 3.7n, 4n, 4.2n, 4.5n, or 5 n. In this way, the width of the third region J1 and the thickness of the second edge magnetic yoke 82451 at the position of the third region J1 can be combined to optimize the structure of the second edge magnetic yoke 82452, thereby improving the magnetic permeability of the second edge magnetic yoke 82452. Specifically, the width of the third sub adaptation region K1 is equal to the width of the third region J1.

Specifically, with continued reference to fig. 14 and 15, the fourth section J2 extends obliquely from the third section J1 in a direction from the center of the second center magnetic yoke 82452 to the outer periphery of the second center magnetic yoke 82452, in a direction away from the plane X in which the center magnet 8241 is located. With such an arrangement, the fourth sub adaptation region K2 can obliquely extend from the third sub adaptation region K1 toward the direction away from the plane X where the central magnet 8241 is located, which is beneficial to utilizing the change of the shape of the side magnet 8242, so that more magnetic lines of force on the side magnet 8242 corresponding to the fourth sub adaptation region K2 participate in the driving of the voice coil 823, thereby improving the magnetic induction intensity of the magnetic circuit 824 and the driving force of the magnetic circuit 824 on the voice coil 823. Specifically, the fourth area J2 can be an inclined plane or a curved surface, wherein the curved surface includes, but is not limited to, an elliptical curved surface or a circular arc surface. Of course, the present application is not limited thereto, and in other examples, the fourth area J2 may also be formed as a stepped surface; alternatively, the fourth region J2 is parallel to the plane X in which the central magnet 8241 lies, so that the third region J1 can form a step with the fourth region J2.

Specifically, the third region J1 is a plane parallel to the plane X in which the center magnet 8241 is located. Of course, the present application is not limited thereto, and in other examples, the third region J1 may also be a slope inclined with respect to the plane X in which the center magnet 8241 is located. As long as the thickness of the second edge magnetic yoke 82451 at the position of the third region J1 is ensured to be larger than the thickness of the second edge magnetic yoke 82451 at the position of the fourth region J2.

Referring to fig. 19, fig. 19 is a schematic structural diagram of a second magnetic conductive yoke 8245 in the magnetic circuit system 824 shown in fig. 13. At least portions of the second edge magnetic yoke 82451 facing the first, second, third, and

fourth side magnets

8242a, 8242b, 8242c, and 8242d are formed with second coupling regions J, respectively. In some examples, as shown in fig. 19, the entire surface of the second edge magnet yoke 82451 facing the edge magnet 8242 is formed as the second mating region J. Therefore, the structure of the second magnetic conductive yoke 8245 can be simplified, and the second magnetic conductive yoke 8245 can be processed and manufactured conveniently.

Specifically, referring to fig. 19, the surface of the second edge magnetic yoke 82451 facing the side magnet 8242 has a first magnetic permeable region 824511 and a second magnetic permeable region 824512 located on both sides in the length direction of the second center magnetic yoke 82452, and the surface of the second edge magnetic yoke 82451 facing the side magnet 8242 has a third magnetic permeable region 824513 and a fourth magnetic permeable region 824514 located on both sides in the width direction of the second center magnetic yoke 82452. First, second, third and fourth magnetically

permeable regions

824511, 824512, 824513 and 824514 are connected in series. First, second, third and fourth magnetically

permeable regions

824511, 824512, 824513 and 824514 are formed as second mating regions J, respectively.

Referring to fig. 20, fig. 20 is a schematic diagram illustrating a second magnetic conductive yoke 8245, a side magnet 8242 and a first edge magnetic conductive yoke 8243 in the magnetic circuit 824 shown in fig. 13. The first side magnet 8242a covers a middle region of the first magnetically permeable region 824511 in the Y-axis direction, and the second accommodation region K of the surface of the first side magnet 8242a facing the first magnetically permeable region 824511 extends to both ends of the first side magnet 8242a in the Y-axis direction. A third side magnet 8242c overlies the central region of the third magnetically permeable region 824513 in the X-axis direction and a second compliant region K of the surface of the third side magnet 8242c facing the third magnetically permeable region 824513 extends in the X-axis direction to both ends of the third side magnet 8242 c. Since second side magnet 8242b has the same structure as first side magnet 8242a and fourth side magnet 8242d has the same structure as third side magnet 8242c, the structures of fourth side magnet 8242d and second side magnet 8242b will not be described in detail.

Of course, the present application is not limited thereto, and in other embodiments, the second mating region J may be provided on the second edge magnetic yoke 82451 only in a region covered by the edge magnet 8242.

To further increase the magnetic flux strength and improve the magnetic permeability of the second magnetic permeable yoke 8245, the second edge magnetic permeable yoke 82451 is connected to the second center magnetic permeable yoke 82452 by the connecting yoke portion 82453. Also, the thickness of the coupling yoke portion 82453, the thickness of the second edge magnetic yoke 82451 at the third region J1, and the thickness of the portion of the second center magnetic yoke 82452 where the second groove 824521 is not provided are equal.

On the basis of the above embodiment, please refer to fig. 21 and 22 for the electrical connection between the core 82 and the electrical connection structure 83, fig. 21 is a schematic diagram illustrating the magnetic circuit 824, the frame 821, the voice coil 823, the electrical connection member 825 and the counterweight balancing unit 826 shown in fig. 13; fig. 22 is a schematic diagram of the magnetic circuit 824, the voice coil 823, the electrical connector 825 and the weight balancing unit 826 according to fig. 13. The core 82 includes electrical connections 825. The electric connector 825 is connected between the first short side portion 821a of the frame 821 and the voice coil 823. Thus, electrical connector 825 has a shorter connection path and can be made smaller in size, which is advantageous in reducing the cost of core 82. The connection of electrical connector 825 to basin frame 821 includes, but is not limited to, gluing, snapping, screwing, or welding. The electrical connector 825 may be attached to the voice coil 823 by means including, but not limited to, gluing, snapping, screwing, or welding.

The electrical connector 825 has two first ends D1 and two second ends D2, and the two first ends D1 and the two second ends D2 are electrically connected in a one-to-one correspondence. Two first end portions D1 of the electrical connector 825 are respectively connected to two corner positions of the voice coil 823 adjacent to the first short side portion 821a, and are respectively electrically connected to positive and negative leads of the voice coil 823 at the two corner positions. Two second ends D2 are provided at both ends of the first short side 821a, respectively. Specifically, the second end portions D2 of the two electrical connection units 8251 are provided at both ends of the region of the bottom surface 821f of the bowl frame 821 on the first short side portion 821a, respectively. In this way, the electrical input end of the voice coil 823 is led out to both ends of the first short side portion 821a, and the two second end portions D2 form two external terminals of the core 82, which are used for electrical connection with the electrical connection structure 83 in fig. 3 to 4, so as to further introduce the audio electrical signal into the voice coil 823.

On the basis, with continued reference to fig. 21 and 22, the electrical connection member 825 includes two electrical connection units 8251. Two electrical connection units 8251 are disposed spaced apart along the Y-axis direction. Each of the electrical connection units 8251 has a first end D1 and a second end D2. And a portion of one of the electrical connection units 8251 is located between the first side magnet 8242a and the third side magnet 8242c, and another portion of the one of the electrical connection units 8251 is located in the escape space M at the corresponding position. A portion of another electrical connection unit 8251 is located between the first side magnet 8242a and the fourth side magnet 8242d, and another portion of the another electrical connection unit 8251 is located in the avoidance space M at the corresponding position. A portion of the first sub-edge magnetic yoke 8244a between the two electrical connection units 8251 may be fixed to a middle region of the bottom surface 821f of the tub 821 at the first short side portion 821 a.

In the embodiment of the present application, by making the electrical connection member 825 include two spaced apart electrical connection units 8251, it is possible to completely space apart the positive and negative electrodes of the core 82 on the one hand, and to improve the reliability of the electrical connection of the core 82 with the electrical connection structure 83; on the other hand, the fixing of the portion of the first sub-edge yoke 8244a located between the two electrical connection units 8251 to the bottom surface of the first short side portion 821a can be facilitated, thereby improving the reliability of the connection of the tub 821 and the magnetic circuit 824.

Of course, the present application is not limited thereto, and in other embodiments, the electrical connector 825 may also be a single piece. The first sub-edge yoke 8244a can be secured to the bottom surface 821f of the basin frame 821 via electrical connection 825.

To avoid the electrical connection unit 8251 from impeding the motion of the voice coil 823, in some embodiments, the electrical connection unit 8251 is a flexible electrical connection structure including, but not limited to, FPCs and structures formed by multiple wires connected through a flexible structure. The structure of two electrical connection units 8251, and the connection method of two electrical connection units 8251 to voice coil 823 and tub 821 are the same, and the structure of electrical connection unit 8251 will be described below by taking electrical connection unit 8251 located between first side magnet 8242a and third side magnet 8242c as an example.

Specifically, with continued reference to fig. 22, the electrical connection unit 8251 includes a body 82511 and a branch 82512. The body 82511 is provided on a region of the bottom surface 821f of the tub 821 on the first short side 821 a. The body 82511 extends along the extending direction of the first short side portion 821a, and a part of the body 82511 is located between the first side magnet 8242a and the third side magnet 8242c, and another part of the body 82511 is located in the escape space M. One end of body 82511 adjacent the end of first short leg 821a forms second end D2. Branch 82512 includes a head end 825121, a first end D1, and a connecting section 825122 connected between head end 825121 and first end D1. The head ends 825121 of the limbs 82512 are connected to the portion of the body 82511 within the escape space M. The first end D1 is a movable end and is movable relative to the body 82511. When the first end D1 is forced to move relative to the body 82511, the connecting section 825122 of the branch 82512 can be driven to move relative to the body 82511.

In the embodiment of the application, the avoidance space M is arranged on the magnetic circuit 824, so that the avoidance space M is used for avoiding the connecting section 825122 of the electrical connection unit 8251, on one hand, the length of the connecting section 825122 is longer, the deformation capacity of the electrical connection unit 82511 is improved, and the influence on the moving range of the voice coil 823 in the Z-axis direction due to the shorter arrangement of the connecting section 825122 is avoided; on the other hand, when the first end D1 is forced to move relative to the body 82511, the movement of the connecting segment 825122 relative to the body 82511 is facilitated, and the magnetic circuit 824 is prevented from interfering with the movement of the connecting segment 825122.

On this basis, the balance of the forces applied to both ends of the voice coil 823 in the X axis direction is ensured. With continued reference to fig. 21 and 22, the core 82 also includes a counterweight counterbalance 826. A weight balance member 826 is connected between the second short side portion 821b of the tub 821 and the voice coil 823. The weight counterbalance 826 and the electrical connection 825 are symmetrically disposed with respect to the voice coil 823. In particular, the weight counterbalance 826 includes two weight counterbalance units 8261. Two weight balance units 8261 are provided at a spacing in the extending direction of the second short side portion 821 b. The structure and material of the two weight balancing units 8261 are the same as those of the two electrical connection units 8251, and the connection manner between the two weight balancing units 8261 and the voice coil 823, the connection manner between the two weight balancing units 8261 and the tub frame 821, and the positional relationship between the two weight balancing units 8261 and the magnetic circuit 824 are the same as those of the two electrical connection units 8251, which are not described herein again.

Referring to fig. 23, fig. 23 is a schematic view illustrating magnetic line emission according to the magnetic circuit 824 shown in fig. 13. As can be seen from fig. 23, for the magnetic circuit 824 of the first disclosure, the distribution of magnetic lines of force in the magnetic yoke (the first magnetic yoke and the second magnetic yoke) is relatively uniform, and the magnetic saturation degree is also relatively uniform, so that not only the magnetic efficiency of the magnetic yoke is improved, but also the thickness of the central magnet 8241 and the thickness of the side magnet 8242 corresponding to the second region H2 are increased on the premise that the shape and size of the magnetic circuit 824 are not changed, so as to improve the magnetic flux of the magnetic circuit 824, improve the magnetic induction strength of the magnetic circuit 824, further improve the driving force of the magnetic circuit 824 to the voice coil 823, and improve the amplitude of the speaker module 80. Specifically, the external playing effect can be improved by 1-2dB compared with the conventional scheme.

Example two

Referring to fig. 24, fig. 24 is a cross-sectional structural diagram of a magnetic circuit system 824 according to still other embodiments of the present application. The magnetic circuit 824 in this embodiment is different from the magnetic circuit 824 of the first example in that: the center magnet 8241 is no longer provided with the first protrusion 8241a1 and the second protrusion 8241b1, the first center magnetic yoke 8243 is no longer provided with the first groove 82431, and the second center magnetic yoke 82452 is no longer provided with the second groove 824521. That is, the thickness of the center magnet 8241 is equal everywhere, the thickness of the first center magnetic yoke 8243 is equal everywhere, and the thickness of the second center magnetic yoke 82452 is equal everywhere.

Example three

Referring to fig. 25, fig. 25 is a cross-sectional structural diagram of a magnetic circuit 824 according to still another embodiment of the present application. The magnetic circuit 824 in this embodiment is different from the magnetic circuit 824 of the first example in that: the first adaptive region G and the second adaptive region K are no longer provided in the edge magnet 8242, the first mating region H is no longer provided in the first edge yoke 8244, and the second mating region J is no longer provided in the second edge yoke 82451. That is, the thickness of the side magnet 8242 is equal everywhere, the thickness of the first edge magnetic yoke 8244 is equal everywhere, and the thickness of the second edge magnetic yoke 82451 is equal everywhere.

Example four

Referring to fig. 26, fig. 26 is a cross-sectional structural diagram of a magnetic circuit system 824 according to some other embodiments of the present application. The magnetic circuit 824 in this embodiment is different from the magnetic circuit 824 of the first example in that: the first adaptive region G is no longer disposed on the edge magnet 8242 and the first mating region H is no longer disposed on the first edge magnetic yoke 8244.

Example five

Referring to fig. 27, fig. 27 is a cross-sectional structural diagram of a magnetic circuit system 824 according to still other embodiments of the present application. The magnetic circuit 824 in this embodiment is different from the magnetic circuit 824 of the first example in that: the second fitting region K is not provided in the edge magnet 8242, and the second fitting region J is not provided in the second edge magnetic yoke 82451.

Referring back to fig. 12, as described above, in the case of conducting magnetic currents by using the first center magnetic yoke 8243 having a uniform thickness and the second center magnetic yoke 82452 having a uniform thickness, the number of magnetic lines of force transmitted by the first center magnetic yoke 8243 and the second center magnetic yoke 82452 to be involved in driving the voice coil 823 is larger at a position closer to the voice coil 823, and the number of magnetic lines of force transmitted by the first center magnetic yoke 8243 and the second center magnetic yoke 82452 to be involved in driving the voice coil 823 is smaller at a position farther from the voice coil 823, as shown in fig. 12. The magnetic saturation degree of the first center magnetic yoke 8243 and the second center magnetic yoke 82452 near the voice coil 823 is relatively large, and even reaches the magnetic saturation limit, so that the magnetic lines of force cannot be further transmitted by the portions of the first center magnetic yoke 8243 and the second center magnetic yoke 82452 near the voice coil 823, and the design of the magnetic circuit system is unreasonable, which is not favorable for further improvement of the driving force of the magnetic circuit system 824. The following embodiments are adopted to solve the problem of small driving force of the magnetic circuit 824 without considering the external dimensions of the magnetic circuit.

Example six

Referring to fig. 28, fig. 28 is a cross-sectional structural diagram of a magnetic circuit system 824 according to other embodiments of the present application. The present embodiment differs from the magnetic circuit 824 shown in fig. 5-6 described above in that: a first protrusion 82433 is formed at an edge of a surface of the first center magnetic yoke 8243 facing away from the center magnet 8241, and a first protrusion 82433 extends around the entire circumference of the first center magnetic yoke 8243. Can increase the thickness at the edge of first center magnetic yoke 8243 like this to can increase the magnetic saturation limit at the edge of first center magnetic yoke 8243, can utilize first center magnetic yoke 8243 like this to lead voice coil 823 with more magnetic lines of force, improve magnetic circuit 824's magnetic flux, thereby improve magnetic circuit 824 to the drive power of voice coil 823, make speaker module 80 have more amplitude, and make speaker module 80's audio performance optimized.

With continued reference to fig. 28, a portion of the first edge magnet yoke 8244 adjacent the first center magnet yoke 8243 facing away from the edge magnet 8242 is formed with a second protrusion 82446. Therefore, the thickness of the first edge magnetic yoke 8244 at the position adjacent to the voice coil 823 can be increased, the magnetic saturation limit at the edge of the first edge magnetic yoke 8244 can be increased, more magnetic lines of force can be guided to the voice coil 823 by the first edge magnetic yoke 8244, the magnetic flux of the magnetic circuit 824 can be increased, the driving force of the magnetic circuit 824 on the voice coil 823 can be increased, the loudspeaker module 80 can have larger amplitude, and the audio performance of the loudspeaker module 80 can be optimized. Of course, the present application is not limited to this, and the second protrusion 82446 may not be provided on the first edge magnetic yoke 8244.

With continued reference to fig. 28, a third protrusion 82458 is formed at an edge of the surface of the second center magnet yoke 82452 facing away from the center magnet 8241, and the third protrusion 82458 extends around the entire circumference of the second center magnet yoke 82452. Can increase the thickness at the edge of second center magnetic yoke 82452 like this to can increase the magnetic saturation limit at the edge of second center magnetic yoke 82452, can utilize second center magnetic yoke 82452 like this to lead voice coil 823 with more magnetic lines of force, improve magnetic circuit 824's magnetic flux, thereby improve magnetic circuit 824 to the drive power of voice coil 823, make speaker module 80 have more amplitude, and make speaker module 80's audio performance optimized. Of course, it is understood that the third protrusion 82458 may not be disposed on the second center yoke 82452.

With continued reference to fig. 28, a portion of the second edge yoke 82451 that is adjacent to the second center yoke 82452 is formed with a fourth protrusion 824515 on the surface of the second edge yoke 82451 facing away from the edge magnet 8242. Therefore, the thickness of the second edge magnetic yoke 82451 at the position adjacent to the voice coil 823 can be increased, the magnetic saturation limit at the edge of the second edge magnetic yoke 82451 can be increased, more magnetic lines of force can be guided to the voice coil 823 by the second edge magnetic yoke 82451, the magnetic flux of the magnetic circuit 824 can be increased, the driving force of the magnetic circuit 824 on the voice coil 823 can be increased, the loudspeaker module 80 can have larger amplitude, and the audio performance of the loudspeaker module 80 can be optimized. Of course, the present invention is not limited to this, and the fourth protruding portion 824515 may not be provided on the second edge magnetic yoke 82451.

Since the speaker module 80 provided by the embodiment of the present application includes the core 82 described in any of the above embodiments, the two embodiments can solve the same technical problem and achieve the same effect.

Since the electronic device 100 provided by some embodiments of the present application includes the speaker module 80, the two modules can solve the same technical problem and achieve the same effect.

The particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present application.

Claims

1. A core (82) comprising a magnetic circuit (824), the magnetic circuit (824) comprising a center magnet (8241), a side magnet (8242), a first center magnetic yoke (8243), and a second center magnetic yoke (82452);

the side magnet (8242) is arranged around the periphery of the central magnet (8241), the magnetizing direction of the side magnet (8242) is opposite to that of the central magnet (8241), and a magnetic gap (824a) is formed between the side magnet (8242) and the central magnet (8241);

the central magnet (8241) is provided with a first surface (8241a) and a second surface (8241b) which are opposite to each other along the thickness direction of the central magnet, the first central magnetic yoke (8243) is arranged on the first surface (8241a) in a laminated mode, a first groove (82431) is formed in the middle of the first central magnetic yoke (8243) facing the first surface (8241a), the second central magnetic yoke (82452) is arranged on the second surface (8241b) in a laminated mode, and a second groove (824521) is formed in the middle of the second central magnetic yoke (82452) facing the second surface (8241 b);

be equipped with first protrusion (8241a1) on first surface (8241a), be equipped with second protrusion (8241b1) on second surface (8241b), first protrusion (8241a1) adaptation is in first recess (82431), second protrusion (8241b1) adaptation is in second recess (824521).

2. The core (82) according to claim 1, wherein a distance between a wall surface of the first groove (82431) and the first surface (8241a) is gradually decreased in a direction from a center of the first center yoke (8243) to an outer periphery of the first center yoke (8243).

3. The core (82) according to claim 2, wherein the wall surface of the first recess (82431) is a spherical crown surface or a conical surface.

4. The core (82) according to any of claims 1-3, wherein a thickness of the first central magnetic shunt yoke (8243) at the first recess (82431) is smaller than a thickness of the first central magnetic shunt yoke (8243) at other locations.

5. The core (82) according to any one of claims 1 to 4, wherein a distance between a wall surface of the second groove (824521) and the second surface (8241b) is gradually decreased in a direction from a center of the second center yoke (82452) to an outer periphery of the second center yoke (82452).

6. The core (82) as recited in any one of claims 1-5, wherein a thickness of the second center magnetic yoke (82452) at the second groove (824521) is less than a thickness of the second center magnetic yoke (82452) at other locations.

7. The core (82) as claimed in any of claims 1-6, wherein the magnetic circuit system (824) further comprises a first edge magnetic yoke (8244);

the first edge magnetic yoke (8244) is stacked on the same surface of the side magnet (8242) as the first surface (8241a), and the first edge magnetic yoke (8244) is positioned on the periphery of the first center magnetic yoke (8243) and is spaced apart from the first center magnetic yoke (8243);

the surface of the first edge magnetic yoke (8244) facing the edge magnet (8242) is formed with a first mating region (H), the first mating region (H) comprises a first region (H1) and a second region (H2), the second region (H2) is positioned on the side of the first region (H1) far away from the first center magnetic yoke (8243), and the distance between the second region (H2) and the plane (X) where the center magnet (8241) is positioned is larger than the distance between the first region (H1) and the plane (X) where the center magnet (8241) is positioned;

the surface of the side magnet (8242) facing the first edge magnetic yoke (8244) is formed with a first adaptation region (G) comprising a first sub adaptation region (G1) and a second sub adaptation region (G2), the second sub adaptation region (G2) is located on the side of the first sub adaptation region (G1) away from the central magnet (8241), the distance between the second sub adaptation region (G2) and the plane (X) on which the central magnet (8241) is located is greater than the distance between the first sub adaptation region (G1) and the plane (X) on which the central magnet (8241) is located, the second sub adaptation region (G2) is adapted to the second region (H2), and the first sub adaptation region (G1) is adapted to the first region (H1).

8. The core (82) of claim 7, wherein the thickness of the first edge magnetic yoke (8244) at the first region (H1) is greater than the thickness of the first edge magnetic yoke (8244) at the second region (H2), and the thickness of the side magnet (8242) at the second sub-accommodation region (G2) is greater than the thickness of the side magnet (8242) at the first sub-accommodation region (G1).

9. The core (82) as claimed in claim 7 or 8, wherein the first region (H1) has a width dimension d, the first edge yoke (8244) has a thickness dimension H corresponding to the first region (H1), and d and H satisfy d ≧ 0.5H.

10. The core (82) as claimed in any of claims 7 to 9, wherein the second region (H2) extends obliquely from the first region (H1) in a direction from the center of the first central magnetic yoke (8243) to the outer periphery of the first central magnetic yoke (8243) in a direction away from the plane (X) in which the central magnet (8241) lies.

11. The core (82) according to any one of claims 7-10, wherein the side magnets (8242) comprise first (8242a), second (8242b), third (8242c) and fourth (8242d) spaced apart side magnets;

the first side magnet (8242a) and the second side magnet (8242b) are respectively arranged at two opposite sides of the central magnet (8241), the third side magnet (8242c) and the fourth side magnet (8242d) are respectively arranged at the other two opposite sides of the central magnet (8241), and the arrangement directions of the third side magnet (8242c) and the fourth side magnet (8242d) are vertical to the arrangement directions of the first side magnet (8242a) and the second side magnet (8242 b);

the first edge magnetic yoke (8244) comprises: a first sub-edge yoke (8244a), a second sub-edge yoke (8244b), a third sub-edge yoke (8244c) and a fourth sub-edge yoke (8244d) which are spaced apart from each other, the first sub-edge yoke (8244a) being fitted to the first side magnet (8242a), the second sub-edge yoke (8244b) being fitted to the second side magnet (8242b), the third sub-edge yoke (8244c) being fitted to the third side magnet (8242c), the fourth sub-edge yoke (8244d) being fitted to the fourth side magnet (8242d), the first fitting region (H) being formed on each of the first sub-edge yoke (8244a) and the second sub-edge yoke (8244 b).

12. The core (82) of claim 11, further comprising a basin frame (821), a voice coil (823), and an electrical connection (825);

the magnetic circuit system (824) is fixed on the same surface of the basin frame (821) as the second surface (8241b) in the facing direction, the voice coil (823) is positioned in the basin frame (821), and part of the voice coil (823) extends into the magnetic gap (824 a);

the frame (821) is in a rectangular frame shape, the frame (821) comprises a first short side portion (821a) and a second short side portion (821b) which are oppositely arranged, the extending direction of the first short side portion (821a) and the second short side portion (821b) is consistent with the arrangement direction of the third side magnet (8242c) and the fourth side magnet (8242d), and the electric connecting piece (825) is electrically connected with the voice coil (823) and fixed between the first short side portion (821a) and the voice coil (823).

13. The core (82) of claim 12, wherein the voice coil (823) is in a rectangular frame shape, and the extending directions of two adjacent side portions of the voice coil (823) respectively coincide with the length direction and the width direction of the frame (821);

the electric connector (825) is provided with two first end parts (D1), and the two first end parts (D1) of the electric connector (825) are respectively connected with two corner positions of the voice coil (823) adjacent to the first short side part (821 a).

14. The core (82) according to claim 13, wherein the electrical connectors (825) have two second end portions (D2), the two second end portions (D2) of the electrical connectors (825) are respectively arranged at two ends of the first short side portion (821a), and the two second end portions (D2) are respectively electrically connected with the two first end portions (D1) in a one-to-one correspondence.

15. The core (82) according to claim 14, wherein the electrical connector (825) comprises two electrical connection units (8251), two of said electrical connection units (8251) being arranged spaced apart in the direction of extension of the first short side portion (821a), each of said electrical connection units (8251) having one of said first ends (D1) and one of said second ends (D2), the first end (D1) and the second end (D2) of each of said electrical connection units (8251) being electrically connected;

the first short side part (821a) is opposite to the first sub-edge yoke (8244a), and a portion of the first sub-edge yoke (8244a) between the two electrical connection units (8251) is fixed to a surface of the first short side part (821a) facing the same direction as the second surface (8241 b).

16. The core (82) according to claim 15, wherein an avoidance notch (8244aa) is formed at each of both ends of the first sub-edge magnetic yoke (8244a) in the extending direction of the first short side portion (821a), and the avoidance notch (8244aa) extends to a side edge of the first sub-edge magnetic yoke (8244a) away from the second sub-edge magnetic yoke (8244 b);

avoidance areas (8242aa) are respectively formed on parts, which are opposite to the avoidance notches (8244aa), of the surface, facing the first sub-edge magnetic yoke (8244a), of the first side magnet (8242 a);

each avoidance notch (8244aa) and the avoidance area (8242aa) at the corresponding position define an avoidance space (M), and the avoidance space (M) is used for avoiding the electric connection unit (8251) at the corresponding position.

17. The core (82) according to any of claims 11-16, wherein the third and fourth sub-edge yokes (8244c, 8244d) have the first mating region (H) formed thereon, respectively.

18. The core (82) according to any one of claims 7 to 17, wherein a side surface of the first edge magnetic yoke (8244) facing away from the side magnet (8242) and a side surface of the first center magnetic yoke (8243) facing away from the center magnet (8241) are coplanar.

19. The core (82) of any of claims 1-18, wherein the magnetic circuit system (824) further comprises a second edge magnetic yoke (82451);

the second edge magnetic yoke (82451) is provided on the same facing surface of the side magnet (8242) as the second surface (8241b), and is located at the outer periphery of the second center magnetic yoke (82452);

the surface of the second edge magnetic guiding yoke (82451) facing the edge magnet (8242) is formed with a second matching region (J), the second matching region (J) comprises a third region (J1) and a fourth region (J2) which are connected, the fourth region (J2) is positioned on the side of the third region (J1) far away from the second central magnetic guiding yoke (82452), and the distance between the fourth region (J2) and the plane (X) where the central magnet (8241) is positioned is larger than the distance between the third region (J1) and the plane (X) where the central magnet (8241) is positioned;

the surface of the side magnet (8242) facing the second edge magnetic yoke (82451) is formed with a second adaptation region (K), the second adaptation region (K) comprises a third sub adaptation region (K1) and a fourth sub adaptation region (K2), the fourth sub adaptation region (K2) is located on the side of the third sub adaptation region (K1) far away from the central magnet (8241), the distance between the fourth sub adaptation region (K2) and the plane (X) where the central magnet (8241) is located is larger than the distance between the third sub adaptation region (K1) and the plane (X) where the central magnet (8241) is located, the fourth sub adaptation region (K2) is adapted to the fourth region (J2), and the third sub adaptation region (K1) is adapted to the third region (K1).

20. The core (82) as claimed in claim 19, wherein the fourth region (J2) extends obliquely from the third region (J1) in a direction from the center of the second central magnetic yoke (82452) to the outer periphery of the second central magnetic yoke (82452) in a direction away from the plane (X) in which the central magnet (8241) lies.

21. The core (82) as claimed in claim 19 or 20, wherein the side magnets (8242) comprise first and second spaced side magnets (8242a, 8242 b);

the first side magnet (8242a) and the second side magnet (8242b) are respectively arranged at two opposite sides of the central magnet (8241);

at least portions of the second edge yoke (82451) facing the first side magnet (8242a) and the second side magnet (8242b) are formed with the second engagement regions (J), respectively.

22. The core (82) of claim 21, wherein the side magnets (8242) comprise spaced apart third (8242c) and fourth (8242d) side magnets;

the third side magnet (8242c) and the fourth side magnet (8242d) are respectively arranged at the other two opposite sides of the central magnet (8241), the arrangement direction of the third side magnet (8242c) and the fourth side magnet (8242d) is perpendicular to the arrangement direction of the first side magnet (8242a) and the second side magnet (8242b), and second matching regions (J) are respectively formed at least at the parts, opposite to the third side magnet (8242c) and the fourth side magnet (8242d), of the second edge magnetic yoke (82451).

23. The core (82) according to claim 22, wherein the second edge yoke (82451) has a rectangular ring shape, and the entire surface of the second edge yoke (82451) facing the side magnet (8242) is formed with the second fitting region (J).

24. The core (82) of any of claims 19-23, wherein the second edge yoke (82451) is connected to the second center yoke (82452) by a connecting yoke portion (82453), the connecting yoke portion (82453) being directly opposite the magnetic gap (824 a).

25. The core (82) of claim 24, wherein a thickness of the connecting yoke portion (82453), a thickness of the second edge yoke portion (82451) at the third region (J1), and a thickness of a portion of the second center yoke portion (82452) where the second groove (824521) is not disposed are equal.

26. The core (82) as claimed in any of claims 19 to 25, wherein a side surface of the second edge yoke (82451) facing away from the edge magnets (8242) and a side surface of the second center yoke (82452) facing away from the center magnets (8241) are coplanar.

27. A loudspeaker module (80) comprising a housing (81) and a core (82) according to any one of claims 1 to 26, the core (82) being disposed within the housing (81), and the housing (81) being divided by the diaphragm group (822) of the core (82) into a front chamber (C1) and a rear chamber (C2), the voice coil (823) and the magnetic circuit system (824) of the core (82) being located within the rear chamber (C2), the housing (81) being provided with a sound outlet channel (80a), the front chamber (C1) being in communication with the sound outlet channel (80 a).

28. An electronic device (100), comprising a housing (10), a main board, and the speaker module (80) of claim 27, wherein the main board and the speaker module (80) are disposed in the housing (10), and the speaker module (80) is electrically connected to the main board, and a sound outlet hole (11a) is formed in the housing (10), and the sound outlet channel (80a) is communicated with the sound outlet hole (11 a).