阅读说明：本技术 扬声器和电子设备 (Speaker and electronic apparatus ) 是由 蔡晓东 张鹏 张琳琳 于 2020-04-30 设计创作，主要内容包括：本发明公开一种扬声器和电子设备,扬声器包括：磁路系统,包括间隔设置的第一磁体部分和第二磁体部分,第一磁体部分和第二磁体部分上部相对的两个异性磁极之间形成第一磁间隙、下部相对的两个异性磁极之间形成第二磁间隙,上部相对的两个异性磁极和下部相对的两个异性磁极的磁极分布方向相反；扁平音圈的轴向垂直于振膜的振动方向,扁平音圈具有沿振动方向间隔分布的两个第一导线段,两个第一导线段分别位于第一磁间隙和第二磁间隙中；以及长条形的壳体,形成收容空间,收容空间用以收容固定振动系统和磁路系统,壳体具有相对的第一端部和第二端部,第一端部与振膜连接,第一端部的宽度尺寸大于第二端部的宽度尺寸。(The invention discloses a speaker and electronic equipment, the speaker includes: the magnetic circuit system comprises a first magnet part and a second magnet part which are arranged at intervals, a first magnetic gap is formed between two opposite magnetic poles at the upper parts of the first magnet part and the second magnet part, a second magnetic gap is formed between two opposite magnetic poles at the lower parts of the first magnet part and the second magnet part, and the magnetic pole distribution directions of the two opposite magnetic poles at the upper parts and the two opposite magnetic poles at the lower parts are opposite; the axial direction of the flat voice coil is vertical to the vibration direction of the vibrating diaphragm, the flat voice coil is provided with two first lead sections which are distributed at intervals along the vibration direction, and the two first lead sections are respectively positioned in the first magnetic gap and the second magnetic gap; and the elongated shell forms an accommodating space for accommodating and fixing the vibration system and the magnetic circuit system, the shell is provided with a first end part and a second end part which are opposite, the first end part is connected with the vibrating diaphragm, and the width dimension of the first end part is larger than that of the second end part.)

1. A loudspeaker, comprising:

the magnetic circuit system comprises a first magnet part and a second magnet part which are arranged at intervals to form a magnetic gap, wherein a first magnetic gap is formed between two opposite magnetic poles at the upper part of the first magnet part and the second magnet part, a second magnetic gap is formed between two opposite magnetic poles at the lower part of the first magnet part and the second magnet part, and the magnetic pole distribution directions of the two opposite magnetic poles at the upper part and the two opposite magnetic poles at the lower part are opposite;

the vibration system comprises a vibrating diaphragm and a flat voice coil for driving the vibrating diaphragm to vibrate, the axial direction of the flat voice coil is perpendicular to the vibration direction of the vibrating diaphragm, the flat voice coil is provided with two first wire sections which are distributed at intervals along the vibration direction, and the two first wire sections are respectively positioned in the first magnetic gap and the second magnetic gap; and the number of the first and second groups,

the vibration system comprises a strip-shaped shell, wherein an accommodating space is formed in the shell, the accommodating space is used for accommodating and fixing the vibration system and the magnetic circuit system, the shell is provided with a first end portion and a second end portion which are opposite to each other, the first end portion is connected with the vibration film, and the width dimension of the first end portion is larger than that of the second end portion.

2. The loudspeaker of claim 1, wherein the first end portion and the second end portion are connected by a connecting wall, and the connecting wall is gradually enlarged from the second end portion to the first end portion.

3. The loudspeaker of claim 1, wherein the first end portion is divergent in a direction from the second end portion toward the first end portion.

4. A loudspeaker according to claim 1, wherein the first end portion and the second end portion are straight walls that are parallel to each other and extend in the direction of vibration of the diaphragm.

5. The speaker of claim 1, wherein the diaphragm is bonded to the inner circumferential surface of the first end portion through a thermal compression process or an injection molding process.

6. The loudspeaker of claim 5, wherein the diaphragm is integrally formed with the housing by injection molding using liquid silicone rubber;

or the diaphragm is integrally formed with the shell through a hot pressing process by adopting one of solid silicon rubber, AEM rubber or ACM rubber.

7. The loudspeaker of claim 1, wherein the number of conductive wire layers in the axial direction of the flat voice coil is smaller than the number of conductive wire layers in the radial direction of the flat voice coil.

8. A loudspeaker according to any one of claims 1 to 7, wherein the diaphragm is curved and projects away from the flat voice coil.

9. The loudspeaker of claim 8, wherein the end surface of the first end portion is curved, and the direction of curvature of the end surface of the first end portion is the same as the direction of curvature of the diaphragm.

10. An electronic device comprising a housing and a loudspeaker according to any of claims 1-9, said loudspeaker being sealingly connected to said housing.

11. The electronic device of claim 10, wherein the electronic device has a motherboard and a screen disposed opposite each other, wherein the second end of the speaker is disposed between the motherboard and the screen, and wherein the first end extends out of a gap between the motherboard and the screen.

12. The electronic device of claim 10,

the vibrating diaphragm is in a bent shape and protrudes towards the direction far away from the flat voice coil;

the shell is in a bent shape, and the bending direction of the shell is the same as that of the loudspeaker diaphragm.

Technical Field

The present invention relates to the field of acoustic energy conversion technologies, and in particular, to a speaker and an electronic device.

Background

For a moving coil speaker, the acoustic performance is directly related to the size of the moving coil speaker. Larger dimensions are relatively more acoustically effective and smaller dimensions are relatively less acoustically effective.

In consideration of portability, comfort and beauty, electronic devices such as mobile phones or wearable intelligent terminals have strict requirements on dimensions, and the sizes and thicknesses of the electronic devices tend to be miniaturized more and more. Therefore, after removing various main components such as a chip, a battery, a main board, and a motor, a space for a built-in speaker is small, and the performance of the speaker is hardly improved.

Disclosure of Invention

The invention mainly aims to provide a loudspeaker, which aims to ensure that the loudspeaker has smaller size and improve the performance of the loudspeaker.

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

the magnetic circuit system comprises a first magnet part and a second magnet part which are arranged at intervals to form a magnetic gap, a first magnetic gap is formed between two opposite magnetic poles at the upper part of the first magnet part and the second magnet part, a second magnetic gap is formed between two opposite magnetic poles at the lower part of the first magnet part and the second magnet part, and the magnetic pole distribution directions of the two opposite magnetic poles at the upper part and the two opposite magnetic poles at the lower part are opposite;

the vibration system comprises a vibrating diaphragm and a flat voice coil for driving the vibrating diaphragm to vibrate, the axial direction of the flat voice coil is perpendicular to the vibration direction of the vibrating diaphragm, the flat voice coil is provided with two first wire sections distributed at intervals along the vibration direction, and the two first wire sections are respectively positioned in the first magnetic gap and the second magnetic gap; and the number of the first and second groups,

the vibration system comprises a strip-shaped shell, wherein an accommodating space is formed in the shell, the accommodating space is used for accommodating and fixing the vibration system and the magnetic circuit system, the shell is provided with a first end portion and a second end portion which are opposite to each other, the first end portion is connected with the vibration diaphragm, and the width dimension of the first end portion is larger than that of the second end portion.

Optionally, the first end and the second end are connected by a connecting wall, and the connecting wall is arranged in a gradually expanding manner from the second end to the first end.

Optionally, the first end portion is arranged in a divergent manner in a direction from the second end portion to the first end portion.

Optionally, the first end portion and the second end portion are straight walls parallel to each other and extending along the vibration direction of the diaphragm.

Optionally, the diaphragm is bonded to the inner peripheral surface of the first end portion through a hot pressing process or an injection molding process.

Optionally, the diaphragm is integrally formed with the housing by using liquid silicone rubber through an injection molding process;

or the diaphragm is integrally formed with the shell through a hot pressing process by adopting one of solid silicon rubber, AEM rubber or ACM rubber.

Optionally, the number of conductive wire layers in the axial direction of the flat voice coil is smaller than the number of conductive wire layers in the radial direction of the flat voice coil.

Optionally, the diaphragm is curved and protrudes away from the flat voice coil.

Optionally, the end surface of the first end portion is in a curved shape, and the direction of the curvature of the end surface of the first end portion is the same as the direction of the curvature of the diaphragm.

The invention also discloses electronic equipment which comprises a shell and the loudspeaker, wherein the loudspeaker is connected with the shell in a sealing way.

Optionally, the electronic device is a mobile phone, the mobile phone has a main board and a screen that are arranged oppositely, the second end of the speaker is arranged between the main board and the screen, and the first end extends out of a gap between the main board and the screen.

Optionally, the diaphragm is curved and protrudes in a direction away from the flat voice coil;

the shell is in a bent shape, and the bending direction of the shell is the same as the bending direction of the loudspeaker diaphragm.

In the invention, because the width of the first end part connected with the vibrating diaphragm is larger than that of the second end part, the sectional area of the first end part is larger, the area of the vibrating diaphragm covering the first end part is inevitably larger, and the increase of the area of the vibrating diaphragm is equivalent to the increase of the effective radiation area and the improvement of the acoustic performance. Meanwhile, the width size of the shell is not integrally increased, only one end of the shell is increased, so that the size of the whole loudspeaker is still small, and the end far away from the vibrating diaphragm, namely the size of the second end part, is small, so that the occupation of the whole machine space can be reduced, the whole machine assembly space is effectively utilized, and the assembly of other parts of the whole machine is not influenced.

Drawings

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

Fig. 1 is a schematic sectional view of an embodiment of the loudspeaker according to the invention;

FIG. 2 is a schematic assembly diagram of the handset of the present invention and the speaker of FIG. 1;

FIG. 3 is a schematic diagram of an assembly of a mobile phone and a conventional speaker;

fig. 4 is a schematic structural diagram of the magnetic circuit system in fig. 1;

FIG. 5 is a schematic structural diagram of a magnetic circuit system in another embodiment of the speaker of the present invention;

fig. 6 is a schematic structural diagram of the diaphragm in fig. 1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100/100＇	Loudspeaker	28	Second magnetic gap
10	Shell body	21	Magnetic gap
				11	First end part	30	Flat voice coil
12	Second end portion	31	First conductor segment
				13	Connecting wall	40	Vibrating diaphragm
21	First magnet part	41	Center part
				22	Second magnet part	42	Folded ring part
23	First magnet	43	Edge part
				24	Second magnet	200	Outer casing
25	Third magnet	201	Sound outlet
				26	Magnetic gap	202/202＇	Main board
27	First magnetic gap	203/203＇	Screen

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

Detailed Description

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

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

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

The invention provides a loudspeaker which can be used for wearable electronic equipment such as a watch, and can also be used for earphones, mobile phones, notebook computers, VR equipment, AR equipment, televisions and the like.

Referring to fig. 1 in combination, a speaker 100 includes a housing 10, a vibration system, and a magnetic circuit system, wherein the housing 10 combines the vibration system and the magnetic circuit system.

The housing 10 in the embodiment of the present invention forms an accommodation space for accommodating and fixing the vibration system and the magnetic circuit system. Specifically, the case 10 extends in a ring shape along the outer edge of the yoke of the magnetic circuit system. The edge portion 43 of the diaphragm 40 in a vibrating system is typically connected to the housing 10, i.e. the housing 10 is arranged around the edge portion 43 of the diaphragm 40. In addition, the housing 10 is further connected to a magnetic conductive yoke, and the housing 10 and the magnetic conductive yoke together enclose a structure with an opening facing the diaphragm 40. The annular housing 10 is referred to as a completely closed ring or a non-completely closed ring.

The housing 10 has a first end portion 11 and a second end portion 12 opposite to each other, the first end portion 11 is connected to the diaphragm 40, and a width dimension of the first end portion 11 is greater than a width dimension of the second end portion 12.

In this embodiment, the housing is an elongated housing, and the length direction of the elongated housing is perpendicular to the distribution direction of the first end portion 11 and the second end portion 12, that is, the distribution direction of the first end portion 11 and the second end portion 12 is the height direction of the housing.

Since the width of the first end portion 11 connected to the diaphragm 40 is greater than the width of the second end portion 12, the sectional area of the first end portion 11 is larger, and the area of the diaphragm 40 covering the first end portion 11 is inevitably larger, which means that the effective radiation area of the diaphragm 40 can be increased, and the acoustic performance can be improved. Meanwhile, the width of the housing 10 is not increased as a whole, but only one end is increased, so that the size of the whole loudspeaker 100 is still small, and the end far away from the diaphragm 40, i.e. the second end 12, is small, so that the occupation of the whole machine space can be reduced, the whole machine assembly space can be effectively utilized, and the assembly of other parts of the whole machine is not affected.

In the above description, the width of the first end portion 11 is larger than the width of the second end portion 12, and in one embodiment, the first end portion 11 and the second end portion 12 are connected by a connecting wall 13, and the connecting wall 13 is gradually enlarged from the second end portion 12 to the first end portion 11. In the present embodiment, the connecting wall 13 is formed in a bell mouth shape, and the end of the connecting wall 13 near the first end portion 11 is larger, so that the width dimension of the first end portion 11 connected thereto is larger, and the end of the connecting wall 13 near the second end portion 12 is smaller, so that the width dimension of the second end portion 12 connected thereto is smaller.

The dimensions of the first end portion 11 and the second end portion 12 can be kept constant in the axial direction by the transitional connection of the connecting wall 13, for example, the first end portion 11 and the second end portion 12 are straight walls parallel to each other and extending along the vibration direction of the diaphragm 40, so that the structure formed by the straight walls is similar to that of a flashlight, and the positioning and installation between the straight walls and other parts are more convenient.

The wall surface at the first end 11, the wall surface at the second end 12 and the connecting wall 13 are all annular.

In addition, the connecting wall 13 may extend in a direction perpendicular to the vibration direction, that is, in a lateral direction, and the width dimension of the first end portion 11 may be made larger than the width dimension of the second end portion 12.

In one embodiment, the first end portion 11 is tapered in a direction from the second end portion 12 to the first end portion 11. In this embodiment, the first end portion 11 itself is of a continuously varying size, forming the shape of a bell mouth.

In one embodiment, the entire housing 10 is tapered along the axial direction and in a direction close to the diaphragm 40, so that the width dimension of the first end portion 11 is larger than the width dimension of the second end portion 12.

The width dimension of the first end portion 11 being greater than the width dimension of the second end portion 12 includes: the inner circumferential dimension of the first end portion 11 is greater than the inner circumferential dimension of the second end portion 12, and the outer circumferential dimension of the first end portion 11 is greater than the outer circumferential dimension of the second end portion 12. As such, the effective vibration area of the diaphragm 40 located inside the first end portion 11 is necessarily large. In this embodiment, the wall thickness may be the same throughout the housing 10.

In one embodiment, the width of the first end portion 11 is greater than the width of the second end portion 12 along the width of the magnetic gap 26. Specifically, the speaker 100 may have a substantially elongated shape, a width direction of which refers to a width direction of the magnetic gap 26, that is, an arrangement direction of the first and second magnet portions, and a length direction of which is perpendicular to the vibration direction, which refers to an extending direction of the first and second magnet portions. The length of the first end portion 11 may be the same as the second end portion 12 in the length direction. In the embodiment connected by the connecting wall 13, the connecting wall 13 has two long walls and two short walls, the long walls are obliquely arranged so that the width between the two long walls is gradually increased in the direction close to the first end portion 11, and the two short walls are arranged in parallel, for example, in parallel with the wall surfaces of the first end portion 11 and the second end portion 12, so that the lengths of the two short walls are the same everywhere.

When the speaker 100 is applied to a mobile phone, the length direction of the speaker 100 is along the left and right directions of the mobile phone (the side where the mobile phone screen 203 is located is the front), and the width direction of the speaker 100 is along the front and back directions of the mobile phone (i.e. the thickness direction of the mobile phone), so that the speaker 100 can fully utilize the widths of the left and right sides of the mobile phone.

Of course, in other embodiments, the cross-section of the speaker 100 may be circular, and the connecting wall 13 may be tapered as a whole.

In one embodiment, the edge portion 43 of the diaphragm 40 is connected to the inner circumferential surface of the first end portion 11. This can reduce or even prevent the edge portion 43 from protruding from the end face of the first end portion 11, and thus can further reduce the height of the speaker 100 in the axial direction thereof. Optionally, the surface of the edge portion 43 facing away from the flat voice coil 30 is flush with the end surface of the first end 11 of the housing 10.

Referring to fig. 4 and 5 in combination, the magnetic circuit system is formed with a magnetic gap 26, and specifically, the magnetic circuit system includes a first magnet portion 21 and a second magnet portion 22 which are arranged at intervals to form the magnetic gap, a first magnetic gap 27 is formed between two opposite magnetic poles at the upper part of the first magnet portion 21 and the second magnet portion 22, a second magnetic gap 28 is formed between two opposite magnetic poles at the lower part of the first magnet portion and the second magnet portion, and the magnetic pole distribution directions of the two opposite magnetic poles at the upper part and the two opposite magnetic poles at the lower part are opposite.

In this embodiment, the upper portion of the first magnet portion 21 and the upper portion of the second magnet portion 22 refer to an end close to the diaphragm 40 (i.e., close to the first end portion 11), and the lower portion of the first magnet portion 21 and the lower portion of the second magnet portion 22 refer to an end away from the diaphragm 40, i.e., close to the yoke (i.e., close to the second end portion 12).

The first magnetic gap 27 and the second magnetic gap 28 are distributed along the vibration direction of the vibration system, the first magnetic gap 27 and the second magnetic gap 28 together constituting the magnetic gap 26 of the magnetic circuit system.

The two opposite magnetic poles mean that the ends of the first and second magnet portions 21 and 22 (referred to as upper or lower portions) adjacent to each other are respectively an N pole and an S pole, for example, the ends of the first and second magnet portions 21 and 22 adjacent to each other are respectively an N pole and an S pole.

The distance between the first magnet portion 21 and the second magnet portion 22 is relatively close, so that the magnetic gap 26 formed is relatively narrow in width and generally elongate in shape.

Wherein the distance between the first magnet portion 21 and the second magnet portion 22 may be relatively short (referring to the distance in the width direction of the housing), so that the magnetic gap 26 is formed to have a narrow width and a generally elongated shape. Furthermore, the first magnet portion 21 and the second magnet portion 22 may be elongated in shape, so that the magnetic gap 26 formed is also elongated.

The magnetic circuit system may further comprise a magnetic yoke, the first magnet part 21 and the second magnet part 22 are arranged on the magnetic yoke, and the first magnet part 21 and the second magnet part 22 are arranged at intervals along a plane of the magnetic yoke.

The magnetic circuit system in the embodiment of the present invention has various modes, and the following is specifically described by two embodiments:

referring to fig. 5, in the first embodiment, the first magnet portion 21 and the second magnet portion 22 each include a first magnet 23; the first magnet 23 is magnetized bidirectionally in a direction perpendicular to the vibration direction so that the first magnet 23 has a first magnetic pole orientation and a second magnetic pole orientation arranged along the vibration direction, the first magnetic pole orientation being opposite to the second magnetic pole orientation; the first magnetic pole orientations of the two first magnets 23 correspond, and the second magnetic pole orientations of the two first magnets 23 correspond.

Wherein the two magnetic poles of the first magnetic pole orientation are distributed perpendicular to the vibration direction, and the two magnetic poles of the second magnetic pole orientation are also distributed perpendicular to the vibration direction. For example, the vibration direction is the up-down direction, the S-pole and the N-pole of the first magnetic pole orientation are distributed from left to right, and the S-pole and the N-pole of the second magnetic pole orientation are distributed from right to left.

In this embodiment, the first magnetic pole orientations of the two first magnets 23 correspond to each other, and the second magnetic pole orientations of the two first magnets 23 correspond to each other. Correspondence in this embodiment means that the first magnetic pole orientations are all near the same side and the second magnetic pole orientation is near the other side, e.g., the first magnetic pole orientation is near the diaphragm 40 and the second magnetic pole orientation is near the yoke. A first magnetic gap 27 is formed between the first magnetic pole orientations of the two first magnets 23 and a second magnetic gap 28 is formed between the second magnetic pole orientations of the two first magnets 23.

The following is specifically illustrated by an example:

the first magnetic pole orientations are distributed at one end of the first magnet 23 near the diaphragm 40, and the S pole and the N pole of the first magnetic pole orientations are distributed in the left-to-right direction, so that the first magnetic pole orientations on the two first magnets 23 are the N pole and the S pole near each other, and the N pole is on the left side, and the S pole is on the right side, that is, the magnetic pole polarities of the two first magnetic pole orientations are opposite.

The second magnetic pole orientations are distributed at the end of the first magnet 23 away from the diaphragm 40, and the S-pole and N-pole of the second magnetic pole orientations are distributed in the direction from right to left, such that in the second magnetic pole orientations on the two first magnets 23, the sides thereof close to each other are the S-pole and the N-pole, and the S-pole is on the left side, and the N-pole is on the right side, i.e., the magnetic poles of the two second magnetic pole orientations are opposite in polarity.

The flat voice coil 30 has two first conductor segments 31 spaced apart along the vibration direction, wherein one first conductor segment 31 is located in the first magnetic gap 27 and the other first conductor segment 31 is located in the second magnetic gap 28. The direction of the magnetic field force applied to the flat voice coil 30 (one of the first wire segments 31) at the first magnetic pole orientation is the same as the direction of the magnetic field force applied to the flat voice coil 30 (the other one of the first wire segments 31) at the second magnetic pole orientation, and the two magnetic field forces are superposed with each other, so that the magnetic field force applied to the flat voice coil 30 is larger, the vibration amplitude of the diaphragm 40 is larger, and the acoustic performance can be improved.

Fig. 4 shows a second embodiment of the magnetic circuit system of the present invention, which is different from the first embodiment in the structure of the magnetic circuit system.

In the second embodiment, the first magnet portion 21 includes a second magnet 24 and a third magnet 25, and the second magnet portion 22 also includes a second magnet 24 and a third magnet 25. specifically, two opposite sides of the flat voice coil 30 are respectively provided with a second magnet 24 and a third magnet 25, the magnetic polarities of the two second magnets 24 are opposite, and the magnetic polarities of the two third magnets 25 are opposite.

In this embodiment, one side of the flat voice coil 30 is provided with a second magnet 24 and a third magnet 25, and the other opposite side is also provided with a second magnet 24 and a third magnet 25.

By arranging one second magnet 24 and one third magnet 25 on the same side of the flat voice coil 30, the arrangement positions of the respective magnets can be adjusted according to the size of the flat voice coil 30 in the vibration direction, resulting in an effect of better matching the shape of the flat voice coil 30. In addition, the second magnet 24 and the third magnet 25 can be adjusted to the positions corresponding to the wire segments of the flat voice coil 30, and the second magnet 24 and the third magnet 25 can be spaced apart from each other in the hollow area of the flat voice coil 30, so that the volume of the magnets can be reduced, and the amount of the magnets can be saved.

In one embodiment, the magnetic poles of the second magnet 24 and the third magnet 25 located on the same side of the flat voice coil 30 are distributed in opposite directions. For example, the left end of the second magnet 24 on the left side is an N pole, the right end is an S pole, and the left end of the third magnet 25 on the left side is an S pole, and the right end is an N pole.

The flat voice coil 30 has two first wire segments 31 spaced apart along the vibration direction, wherein one of the first wire segments 31 is located in the first magnetic gap 27 formed between the two second magnets 24, and the other of the first wire segments 31 is located in the second magnetic gap 28 formed between the two third magnets 25.

With this arrangement, the direction of the magnetic field force applied between the two second magnets 24 by the first wire segment 31 above the flat voice coil 30 is the same as the direction of the magnetic field force applied between the two third magnets 25 by the first wire segment 31 below the flat voice coil 30, which has a superimposed effect, so as to better drive the diaphragm 40 to vibrate.

Referring to fig. 1 again, the vibration system includes a diaphragm 40 and a flat voice coil 30 for driving the diaphragm 40 to vibrate, the flat voice coil 30 is located in the magnetic gap 26, and the flat voice coil 30 drives the diaphragm 40 to vibrate up and down under the action of the magnetic circuit system.

The flat voice coil 30 is used to drive the diaphragm 40 to vibrate. The flat voice coil 30 may be directly connected to the diaphragm 40, or the flat voice coil 30 may be connected to the diaphragm 40 by other means, such as a bracket.

The axial direction of the flat voice coil 30 is perpendicular to the vibration direction of the diaphragm 40, for example, in some embodiments, the axial direction of the flat voice coil 30 is in the transverse direction, and the flat voice coil 30 moves in the magnetic gap 26 in the up-and-down direction; the diaphragm 40 extends substantially in the lateral direction, while the vibration direction of the diaphragm 40 is in the up-down direction.

The flat structure of the flat voice coil 30 means that the flat voice coil 30 is flat in the axial direction thereof. Specifically, the width between the inner and outer peripheral surfaces of the flat voice coil 30 is larger than the thickness of the flat voice coil 30 in the axial direction.

The flat voice coil 30 is formed by winding a conductive wire, and the number of layers of the conductive wire in the axial direction of the flat voice coil is smaller than the number of turns of the conductive wire in the radial direction of the flat voice coil. In this embodiment, the conductive wires of the flat voice coil 30 are distributed along the radial direction, i.e. wound in the radial direction. The height of the flat voice coil 30 in the axial direction thereof is small, for example, in the axial direction thereof, the number of layers formed by winding the conductive wire of the flat voice coil 30 may be one or a small number of layers, so that the thickness of the flat voice coil 30 in the axial direction is small; and along self radial direction, the number of turns that the electrically conductive wire material of flat voice coil 30 was around establishing formation is more for the width that many rings of electrically conductive wire material formed jointly is great, thereby makes flat voice coil 30 form the flat structure that axial thickness is little, and radial width is big.

For example, the axial direction of the flat voice coil 30 is along the width direction of the magnetic gap 26, which enables the distance between the first magnet portion 21 and the second magnet portion 22 forming the magnetic gap 26 to be small, and the structure of the entire speaker 100 may be flat in the width direction of the magnetic gap 26.

Adopt flat voice coil 30, and the axial of flat voice coil 30 is along the width direction of magnetic gap 26, can reduce the width of magnetic gap 26, the space that magnetic gap 26 occupy diminishes promptly, thereby the corresponding inner space who has saved speaker 100, make speaker 100 inside have bigger space holding magnetic circuit, so can improve its acoustic performance through increasing the magnetic circuit size, promptly under the prerequisite that does not increase speaker 100 appearance size, magnetic circuit's volume can be bigger, effect to flat voice coil 30 is better, make the vibration range of vibrating diaphragm 40 bigger. Especially in the case where the speaker 100 is limited in width dimension, the magnetic circuit system is increased in size to maintain good acoustic performance of the speaker 100.

The width direction of the magnetic gap in the present embodiment refers to the distribution direction of the first magnet portion 21 and the second magnet portion 22.

The flat voice coil has two first wire segments 31 distributed at intervals along the vibration direction, the two first wire segments 31 are respectively located in the first magnetic gap 27 and the second magnetic gap 28, that is, one of the first wire segments 31 is located in the first magnetic gap 27, and the other first wire segment is located in the second magnetic gap 28, so that the two first wire segments 31 are both subjected to magnetic field forces in the same direction, and have an overlapping effect on the vibration of the diaphragm.

Referring to fig. 1 and fig. 6, the diaphragm 40 has a central portion 41, a ring-folded portion 42 surrounding an outer edge of the central portion 41, and an edge portion 43 surrounding an outer edge of the ring-folded portion 42, wherein the ring-folded portion 42 and the edge portion 43 are both ring-shaped.

In a traditional loudspeaker, the diaphragm is generally a plane diaphragm, and the acoustic performance of the loudspeaker is closely related to the area of the diaphragm, and generally, the larger the area of the diaphragm is, the better the obtained acoustic performance is. Therefore, in order to improve the acoustic performance, it is a conventional practice to increase the area of the diaphragm by increasing the width dimension of the speaker. This method results in a large volume of the whole speaker, and occupies a large space of the whole speaker, which is not favorable for miniaturization and improvement of the whole speaker.

In view of this, referring to fig. 6, in the embodiment of the present invention, the diaphragm 40 is curved and protrudes in a direction away from the flat voice coil 30. In this embodiment, the diaphragm 40 has a curved shape, which means that the diaphragm 40 is curved as a whole, rather than the flexure of the flexure 42 itself.

By bending the diaphragm 40, on the one hand, the area of the diaphragm 40 can be increased, so that the effective area of the central portion 41 is increased, thereby ensuring the power of the speaker 100 and ensuring the acoustic performance. On the other hand, in this way of bending the diaphragm 40, the width dimension of the loudspeaker 100 does not need to be changed, and the external dimension of the loudspeaker 100 does not need to be too large, i.e. the structure of other parts of the loudspeaker 100, such as the housing 10, the magnetic circuit system and the like, does not need to be changed, and therefore, the normal processing of other parts is not affected.

The shape of the diaphragm 40 can be substantially matched with the overall housing 200, for example, the overall housing 200 is curved, so that the curved diaphragm 40 can be more matched with the overall housing 200, and the overall space can be effectively utilized. Thus, the effective vibration area of the center portion 41 is increased under the condition that the installation space of the speaker 100 is constant, so that the power of the speaker 100 is ensured and the acoustic performance is ensured.

In order to better adapt to the curved shape of the whole casing 200, in one embodiment, the diaphragm 40 has a curved shape along the length of the magnetic gap 26. In this embodiment, the arrangement direction of the first magnet portion 21 and the second magnet portion 22 is the width direction of the magnetic gap 26, and the vibration direction of the diaphragm is the depth direction of the magnetic gap 26. While the diaphragm 40 is not curved in the width direction of the magnetic gap 26. For example, the whole casing 200 is circular, and the diaphragm 40 is curved along the length direction of the magnetic gap 26 to better match the circular whole casing 200.

The diaphragm 40 is curved when viewed from the axial direction of the flat voice coil 30, i.e., from one end of the flat voice coil 30 to the other end. The cross section of the flat voice coil 30 is substantially straight (the protrusion formed by the reinforcing layer and the concave-convex structure formed by the loop portion 42 are not considered here) when viewed from the extending direction of the long axis section 41 of the flat voice coil 30. That is, the curved diaphragm 40 has an aspheric structure, but has a cylindrical curved structure.

In one embodiment, the central portion 41, the folded ring portion 42 and the edge portion 43 are all curved, and the curvature directions of the central portion 41, the folded ring portion 42 and the edge portion 43 are the same. Thus, the whole diaphragm 40 is curved, the curved structure of the central portion 41 can increase the effective vibration area, and the curved structure of the edge portion 42 can enhance the structural strength, so as to better connect the central portion 41 and the edge portion 43; the edge portion 43 is curved, which is beneficial to increase the contact area between the edge portion 43 and the housing 10 and improve the installation stability. Alternatively, the bending curvatures of the central portion 41, the corrugated portion 42, and the edge portion 43 may be the same, so that the overall process may be facilitated.

Since the diaphragm 40 is bent and then protrudes in a direction away from the flat voice coil 30, a space between the diaphragm 40 and the magnetic circuit system is large, so that the ring folding direction of the ring folding portion 42 itself protrudes toward the flat voice coil 30, thereby avoiding the phenomenon that the whole height of the speaker 100 is too large because the ring folding portion 42 protrudes out of the housing 10.

The diaphragm 40 may be generally rectangular in shape, with the length direction of the diaphragm 40 being along the long axis of the flat voice coil 30 and the width direction of the diaphragm 40 being along the axial direction of the flat voice coil 30.

The material of the diaphragm 40 is PEEK or other polymer materials. A reinforcing layer is also provided in the central portion 41 of the diaphragm 40. The reinforcing layer can effectively reduce the split vibration of the diaphragm 40 and reduce noise of the speaker 100.

In the above, after the flat voice coil 30 is adopted, the magnetic gap 26 between the first magnet portion 21 and the second magnet portion 22 can be reduced, so that the inside of the speaker 100 has a larger space for accommodating the magnetic circuit system, that is, on the premise of not increasing the external dimension of the speaker 100, the volume of the magnetic circuit system can be larger, the effect on the voice coil is better, and the vibration amplitude of the diaphragm 40 is larger. In the case where the curved diaphragm 40 and the planar diaphragm 40 have the same area, the size of the entire speaker 100 can be reduced to be smaller by using the curved diaphragm 40 in the embodiment of the present invention, so that the entire size can be smaller. Meanwhile, the flat voice coil 30 occupies a small space, the space saved by the flat voice coil 30 can be used for designing a magnetic circuit system with a large size, and the magnetic circuit system with the large size can ensure that the flat voice coil 30 receives a large magnetic field force in turn, so that the vibrating diaphragm 40 has a good vibrating effect. Therefore, the flat voice coil 30 and the curved diaphragm 40 cooperate with each other to achieve a small size and good acoustic performance of the speaker 100.

In one embodiment, the end surface of the first end portion 11 is curved, and the direction of curvature of the end surface of the first end portion 11 is the same as the direction of curvature of the diaphragm 40. I.e. the end surface of the first end portion 11 is also convex in a direction away from the flat voice coil 30. Alternatively, the curvature of the end surface of the first end portion 11 is the same as the curvature of the diaphragm 40. The structure formed in this way has a higher degree of engagement with the complete machine housing 200, and a higher utilization rate of space.

In the embodiment of the present invention, the diaphragm 40 is bonded to the inner circumferential surface of the first end portion through a hot pressing process or an injection molding process. Specifically, the diaphragm 40 is integrally formed with the housing by using liquid silicone rubber through an injection molding process, wherein the housing 10 is placed in a mold as an insert, and then the liquid silicone rubber is injected to be combined with the housing to form the diaphragm; alternatively, the diaphragm 40 is formed integrally with the housing 10 by a hot pressing process using one of solid silicon rubber, AEM rubber, or ACM rubber. The diaphragm 40 is formed by hot pressing one of solid silicone rubber, AEM rubber or ACM rubber, and can be combined with the housing 10 during the forming process of the diaphragm 40, so as to connect the diaphragm 40 and the housing 10.

Referring to fig. 2, the present invention further provides an electronic device, which includes a housing 200 and a speaker 100, wherein the speaker 100 is hermetically connected to the housing 200. Please refer to the above embodiments for the structure of the speaker 100, which is not described herein. The electronic device may specifically be a wearable electronic device, such as a watch, and in addition, the electronic device may also be an earphone, a mobile phone, a notebook computer, a VR device, an AR device, a television, and the like.

Taking a mobile phone as an example, the mobile phone has a main board 202 and a screen 203 which are oppositely arranged, the main board 202 and the screen 203 are spaced apart from each other, the main board 202 is located inside the housing 200, the second end portion 12 of the speaker 100 is arranged between the main board 202 and the screen 203, for example, the second end portion 12 can be clamped between the main board 202 and the screen 203, and the gap width between the main board 202 and the screen 203 is matched with the second end portion 12. In this embodiment, the first end portion 11 extends out of the gap between the main board 202 and the screen 203.

Taking the up-down direction as an example, the main board 202 is spaced from the top wall of the housing 200, and the mobile phone is a non-full screen mobile phone, and the screen 203 is also spaced from the top wall of the housing 200, so that there is a mounting space at the top of the housing 200, which is located above the main board 202 and the screen 203. The installation space is not blocked by the main board 202 and the screen 203, so that it is large in volume and can satisfy the first end portion 11 and the connecting wall 13 having a large size protruding into the installation space. Thus, the speaker 100 with one end larger than the other end smaller can make full use of the inner space of the mobile phone, thereby realizing smaller size and ensuring a larger vibration area of the diaphragm 40.

As for the conventional speaker 100 ', the sizes of the two ends are the same, and after the first end 11 of the conventional speaker 100' extends upwards out of the gap between the main board 202 'and the screen 203', the top space of the mobile phone cannot be fully utilized, which results in large waste of the top space, and at the same time, the area of the diaphragm is small, so that the effective radiation area is small.

Wherein the housing 200 may have a curved shape, and a curved direction of the housing 200 is the same as a curved direction of the diaphragm 40 of the speaker 100. Alternatively, the curvature of the housing 200 is the same as the curvature of the diaphragm 40. So, the crooked radian of vibrating diaphragm 40 can agree with the crooked radian of shell 200 perfectly, forms an curved vibration space between the two, makes things convenient for the vibration of vibrating diaphragm 40, can promote space utilization by a wide margin.

When the end face of the first end of the enclosure 10 of the speaker 100 is curved, the shape of the speaker 100 is curved, which ensures that the shape of the speaker 100 can be perfectly matched with the circular housing, greatly improving the space utilization rate and improving the performance of the speaker 100.

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