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 2020-03-31 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,扬声器的壳体形成有用以收容固定磁路系统和振动系统的收容空间；磁路系统包括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；振动系统的扁平音圈位于磁间隙,其轴向与振膜的振动方向垂直,扁平音圈的两个第一导线段分别位于第一磁间隙和第二磁间隙中；振膜呈弯曲形状,并朝远离扁平音圈的方向凸出；定心支片设置在壳体远离振膜的一侧,支架分别连接振膜和扁平音圈,并且支架还连接定心支片。(The invention discloses a loudspeaker and electronic equipment, the shell of the loudspeaker forms the accommodating space used for accommodating and fixing the magnetic circuit system and vibration system; the magnetic circuit system comprises a first magnet part and a second magnet part, 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; a flat voice coil of the vibration system is positioned in the magnetic gap, the axial direction of the flat voice coil is vertical to the vibration direction of the vibrating diaphragm, and two first wire sections of the flat voice coil are respectively positioned in the first magnetic gap and the second magnetic gap; the vibrating diaphragm is in a bent shape and protrudes towards the direction far away from the flat voice coil; the centering support piece is arranged on one side, far away from the vibrating diaphragm, of the shell, the support is connected with the vibrating diaphragm and the flat voice coil respectively, and the support is further connected with the centering support piece.)

1. A loudspeaker, characterized by, including body, magnetic circuit and vibration system, the said body forms the accommodation space used for accepting and fixing said magnetic circuit and said vibration system;

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, the flat voice coil is positioned in the magnetic gap, 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 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;

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

the vibration system further comprises a centering support piece and a support, the centering support piece is arranged on one side, away from the vibrating diaphragm, of the shell, the support is respectively connected with the vibrating diaphragm and the flat voice coil, and the support is further connected with the centering support piece.

2. The loudspeaker of claim 1, wherein the spider comprises a diaphragm having a fixed section, a bend section and a support section, the bend section connecting the fixed section and the support section, respectively; the fixed section is connected with the shell, and the supporting section is connected with the bracket.

3. The loudspeaker of claim 1, wherein the spider comprises a fixed section and a resilient cantilever connected, the fixed section being connected to the housing and the resilient cantilever being connected to the support.

4. The speaker as claimed in any one of claims 1 to 3, wherein the support is an electrically conductive member and is electrically connected to the flat voice coil; the centering support is provided with a conducting layer, and the conducting layer is electrically connected with the support.

5. The speaker of claim 4, further comprising a flexible circuit board, wherein the spider is electrically connected to the flexible circuit board.

6. A loudspeaker as claimed in claim 5, characterized in that the flexible circuit board is supported on the surface of the centring disk facing away from the diaphragm.

7. The loudspeaker of claim 6, wherein the housing comprises a main body shell and a limiting shell, the main body shell extends along an edge of the diaphragm, the limiting shell is connected to a side of the main body shell away from the diaphragm and extends into the accommodating space, and the limiting shell abuts against a surface of the centering disk facing the diaphragm.

8. The speaker as claimed in any one of claims 1 to 3, wherein the support is an electrically conductive member and is electrically connected to the flat voice coil; the centering branch piece is a conductive piece and is electrically connected with the bracket.

9. The loudspeaker of claim 8, wherein the spider is a flexible circuit board.

10. The loudspeaker of claim 1, wherein the centering branch piece is provided with a mounting hole, and the bracket is provided with an inserting tongue inserted into the mounting hole; alternatively, the first and second electrodes may be,

the support has towards the mounting panel of centering branch piece, the face of mounting panel with centering branch piece butt.

11. The loudspeaker of claim 1, wherein the vibration system comprises two of the supports and two of the centroiding plates, and the two of the supports and the two of the centroiding plates are arranged in a one-to-one correspondence.

12. The loudspeaker of claim 1, wherein the flat voice coil has an inductive section and two connecting sections respectively disposed at two ends of the inductive section, the inductive section is located in the magnetic gap, and the connecting sections extend out of the magnetic gap along a length direction of the magnetic gap;

the two brackets are positioned outside the magnetic gap and connected with the corresponding connecting sections.

13. The loudspeaker of claim 1,

the first magnet portion and the second magnet portion each comprise a first magnet;

the first magnet is bidirectionally magnetized in a direction perpendicular to the vibration direction so that the first magnet 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 correspond, and the second magnetic pole orientations of the two first magnets correspond;

the two first magnets are provided with first surfaces facing the diaphragm, and the first surfaces are in a curved shape.

14. The loudspeaker of claim 1, wherein the diaphragm is curved along a length of the magnetic gap;

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

15. An electronic device comprising a housing and a loudspeaker according to any one of claims 1 to 14, the housing having a curved shape, the housing having a curved direction which is the same as the curved direction 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

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 various main components such as a chip, a battery, a main board, a motor and the like are removed, a space for the built-in speaker is small, that is, the size of the speaker is generally small, and the thickness of the speaker is thinner and thinner.

However, the performance of a loudspeaker is usually in positive correlation with its size, and the large size means that both the magnetic circuit system and the diaphragm of the loudspeaker can be larger, and the vibration effect of the diaphragm is better. However, the traditional loudspeaker is difficult to achieve the coordination of performance and size, and the performance of the small-size loudspeaker is often difficult to guarantee.

Disclosure of Invention

The main object of the present invention is to propose a loudspeaker aimed at ensuring the acoustic performance of the loudspeaker while ensuring a small size.

In order to achieve the above object, the present invention provides a speaker, which includes a housing, a magnetic circuit system and a vibration system, wherein the housing forms an accommodating space for accommodating and fixing the magnetic circuit system and the vibration system;

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, the flat voice coil is positioned in the magnetic gap, 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 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;

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

the vibration system further comprises a centering support piece and a support, the centering support piece is arranged on one side, away from the vibrating diaphragm, of the shell, the support is respectively connected with the vibrating diaphragm and the flat voice coil, and the support is further connected with the centering support piece.

Optionally, the centering branch piece comprises a vibration film, the vibration film is provided with a fixed section, a bending section and a supporting section, and the bending section is respectively connected with the fixed section and the supporting section; the fixed section is connected with the shell, and the supporting section is connected with the bracket.

Optionally, the centering branch piece comprises a fixed section and an elastic cantilever which are connected, the fixed section is connected with the shell, and the elastic cantilever is connected with the bracket.

Optionally, the support is a conductive member and is electrically connected to the flat voice coil; the centering support is provided with a conducting layer, and the conducting layer is electrically connected with the support.

Optionally, the speaker further includes a flexible circuit board, and the centering branch sheet is electrically connected to the flexible circuit board.

Optionally, the flexible circuit board is supported on a surface of the centering disk facing away from the diaphragm.

Optionally, the casing includes a main body casing and a limiting casing, the main body casing extends along the edge of the vibrating diaphragm, the limiting casing is connected to one side of the main body casing far away from the vibrating diaphragm and extends into the accommodating space, and the limiting casing abuts against the surface of the centering branch piece facing the vibrating diaphragm.

Optionally, the support is a conductive member and is electrically connected to the flat voice coil; the centering branch piece is a conductive piece and is electrically connected with the bracket.

Optionally, the centering branch piece is a flexible circuit board.

Optionally, the centering support is provided with a mounting hole, and the bracket is provided with an insertion tongue inserted into the mounting hole; alternatively, the first and second electrodes may be,

the support has towards the mounting panel of centering branch piece, the face of mounting panel with centering branch piece butt.

Optionally, the vibration system includes two brackets and two centering pads, and the two brackets and the two centering pads are disposed in one-to-one correspondence.

Optionally, the flat voice coil has an induction section and two connection sections respectively disposed at two ends of the induction section, the induction section is located in the magnetic gap, and the connection sections extend out of the magnetic gap along the length direction of the magnetic gap;

the two brackets are positioned outside the magnetic gap and connected with the corresponding connecting sections.

Optionally, the first magnet portion and the second magnet portion each comprise one first magnet;

the first magnet is bidirectionally magnetized in a direction perpendicular to the vibration direction so that the first magnet 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 correspond, and the second magnetic pole orientations of the two first magnets correspond;

the first surfaces of the two first magnets are both in a curved shape.

Optionally, the diaphragm is curved along the length direction of the magnetic gap;

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

The invention also provides electronic equipment which comprises a shell and a loudspeaker, wherein 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.

According to the invention, after the centering support is arranged, the lower side of the support is supported by the centering support, so that the connection strength is high, the movement of the support is more stable, the centering effect is strong, the stability of the flat voice coil is better, the vibration amplitude of the vibrating diaphragm is more uniform, the vibrating diaphragm can be prevented from generating polarization, noise can be effectively reduced, and the tone quality of the loudspeaker can be improved.

Drawings

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

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

FIG. 2 is a schematic sectional view of the speaker of FIG. 1 taken along a long axis of the flat voice coil;

FIG. 3 is a schematic cross-sectional view of the speaker of FIG. 1 along the short axis segment of the flat voice coil;

FIG. 4 is a schematic structural diagram of the diaphragm in FIG. 3;

FIG. 5 is a schematic view of the flat voice coil of FIG. 3;

fig. 6 is a schematic view of a portion of the speaker of fig. 3;

FIG. 7A is a schematic structural view of the centering disk of FIG. 6;

FIG. 7B is a schematic diagram of a centering pad in another embodiment of the speaker of the present invention;

FIG. 8 is a schematic structural diagram of the flexible circuit board of FIG. 6;

FIG. 9 is an assembled view of the first bracket and the centering piece of FIG. 6;

fig. 10 is a schematic view of a portion of the loudspeaker of fig. 1;

FIG. 11 is a schematic structural view of the position limiting shell in FIG. 10;

FIG. 12 is an assembled view of the second bracket and the centering piece of FIG. 6;

FIG. 13 is a schematic view of the first bracket of FIG. 6;

FIG. 14 is an assembled view of the first support, the second support and the voice coil of FIG. 6;

fig. 15 is a bottom view of the speaker portion of fig. 6;

fig. 16 is a front view of the speaker portion of fig. 6;

fig. 17 is a schematic plan view of the loudspeaker of fig. 3;

fig. 18 is a schematic plan view of a speaker according to another embodiment of the present invention;

FIG. 19 is a schematic view of the speaker and the whole device shown in FIG. 1;

fig. 20 is a sectional view of a conventional speaker;

FIG. 21 is a schematic view of a conventional speaker and a complete set assembled together;

fig. 22 is another assembly diagram of the conventional speaker and the whole device.

The reference numbers illustrate:

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

Detailed Description

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

It should be noted that, 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 may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a 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 to 3 in combination, the 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.

Referring to fig. 3 and 17, the magnetic circuit system includes a first magnet portion 23 and a second magnet portion 24 spaced apart to form a magnetic gap 21, a first magnetic gap 28 is formed between two opposite magnetic poles at the upper portion of the first magnet portion 23 and the second magnet portion 24, a second magnetic gap 29 is formed between two opposite magnetic poles at the lower portion of the first magnet portion and the second magnet portion, and the magnetic poles of the two opposite magnetic poles at the upper portion and the two opposite magnetic poles at the lower portion are distributed in opposite directions.

In this embodiment, the upper portion of the first magnet portion 23 and the upper portion of the second magnet portion 24 refer to the end near the diaphragm 50, and the lower portion of the first magnet portion 23 and the lower portion of the second magnet portion 24 refer to the end far from the diaphragm 50, i.e., the end near the yoke 30.

The first magnetic gap 28 and the second magnetic gap 29 are distributed along the vibration direction of the vibration system, the first magnetic gap 28 and the second magnetic gap 29 together constituting the magnetic gap 21 of the magnetic circuit system.

The two opposite magnetic poles mean that the ends of the first and second magnet portions 23 and 24 (referred to as upper or lower portions) adjacent to each other are respectively N-pole and S-pole, for example, the ends of the first and second magnet portions 23 and 24 adjacent to each other are respectively N-pole and S-pole.

The distance between the first magnet portion 23 and the second magnet portion 24 is relatively close, so that the magnetic gap 21 formed is relatively narrow and generally elongate in shape.

The magnetic circuit system may further comprise a magnetic yoke 30, the first magnet portion 23 and the second magnet portion 24 are disposed on the magnetic yoke 30, and the first magnet portion 23 and the second magnet portion 24 are spaced apart along a plane of the magnetic yoke 30.

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. 17, in the first embodiment, the first magnet portion 23 and the second magnet portion 24 each include a first magnet 25; the first magnet 25 is bidirectionally magnetized in a direction perpendicular to the vibration direction so that the first magnet 25 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 25 correspond, and the second magnetic pole orientations of the two first magnets 25 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 25 correspond to each other, and the second magnetic pole orientations of the two first magnets 25 correspond to each other. The 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 50 and the second magnetic pole orientation is near the yoke 30. A first magnetic gap 28 is formed between the first magnetic pole orientations of the two first magnets 25 and a second magnetic gap 29 is formed between the second magnetic pole orientations of the two first magnets 25.

The following is specifically illustrated by an example:

the first magnetic pole orientations are distributed at one end of the first magnet 25 near the diaphragm 50, 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 25 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 25 away from the diaphragm 50, and the S-pole and N-pole of the second magnetic pole orientations are distributed in the direction from right to left, so that the sides of the second magnetic pole orientations on the two first magnets 25, which are 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 pole polarities of the two second magnetic pole orientations are opposite.

The flat voice coil 40 has two first wire segments 41 spaced apart along the vibration direction of the vibration system, wherein one first wire segment 41 is located in the first magnetic gap 28 and the other first wire segment 41 is located in the second magnetic gap 29. The direction of the magnetic field force applied to the flat voice coil 40 (one of the first wire segments 41) at the first magnetic pole orientation is the same as the direction of the magnetic field force applied to the flat voice coil 40 (the other one of the first wire segments 41) 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 40 is larger, and further the vibration amplitude of the diaphragm 50 is larger, thereby improving the acoustic performance.

Fig. 18 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 magnetic circuit system includes two second magnets 26 and two third magnets 27, specifically, one second magnet 26 and one third magnet 27 are respectively disposed on two opposite sides of the flat voice coil 40, the magnetic poles of the two second magnets 26 are opposite, and the magnetic poles of the two third magnets 27 are opposite.

In this embodiment, one side of the flat voice coil 40 is provided with a second magnet 26 and a third magnet 27, and the other opposite side is also provided with a second magnet 26 and a third magnet 27.

By arranging one second magnet 26 and one third magnet 27 on the same side of the flat voice coil 40, the arrangement positions of the respective magnets can be adjusted according to the size of the flat voice coil 40 in the vibration direction, which has the effect of better matching the shape of the flat voice coil 40. In addition, the second magnet 26 and the third magnet 27 can be respectively adjusted to the position corresponding to one wire segment of the flat voice coil 40, and the second magnet 26 and the third magnet 27 can be spaced in the hollow area of the flat voice coil 40, so that the magnet volume can be reduced, and the magnet consumption can be saved.

In one embodiment, the magnetic poles of the second magnet 26 and the third magnet 27 located on the same side of the flat voice coil 40 are distributed in opposite directions. For example, the left end of the second magnet 26 on the left side is an N pole, the right end is an S pole, and the left end of the third magnet 27 on the left side is an S pole, and the right end is an N pole.

The flat voice coil 40 has two first wire segments 41 spaced apart along the vibration direction, wherein one of the first wire segments 41 is located in the first magnetic gap 28 formed between the two second magnets 26, and the other of the first wire segments 41 is located in the second magnetic gap 29 formed between the two third magnets 27.

With this arrangement, the direction of the magnetic field force applied between the two second magnets 26 by the first wire segment 41 above the flat voice coil 40 is the same as the direction of the magnetic field force applied between the two third magnets 27 by the first wire segment 41 below the flat voice coil 40, which has a superimposed effect, so as to better drive the diaphragm 50 to vibrate.

Referring to fig. 4 and fig. 5, the vibration system includes a diaphragm 50 and a flat voice coil 40 for driving the diaphragm 50 to vibrate, the flat voice coil 40 is located in the magnetic gap 21, and the flat voice coil 40 drives the diaphragm 50 to vibrate up and down under the action of the magnetic circuit system.

The axial direction of the flat voice coil 40 is perpendicular to the vibration direction of the diaphragm 50, for example, in some embodiments, the axial direction of the flat voice coil 40 is in the transverse direction, and the flat voice coil 40 moves in the magnetic gap 21 in the up-and-down direction; the diaphragm 50 extends substantially in the lateral direction, while the vibration direction of the diaphragm 50 is in the up-down direction.

The flat structure of the flat voice coil 40 means that the flat voice coil 40 is flat in the axial direction thereof. Specifically, the width between the inner and outer peripheral surfaces of the flat voice coil 40 is larger than the thickness of the flat voice coil 40 in the axial direction.

The flat voice coil 40 is formed by winding a conductive wire, and the conductive wire of the flat voice coil 40 is distributed along the radial direction thereof, i.e., wound in the radial direction. The number of conductive wire layers in the axial direction of the flat voice coil is smaller than the number of conductive wire turns in the radial direction of the flat voice coil. The height of the flat voice coil 40 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 40 may be one or a small number of layers, so that the thickness of the flat voice coil 40 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 40 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 40 form the flat structure that axial thickness is little, radial width is big.

For example, the axial direction of the flat voice coil 40 is along the width direction of the magnetic gap 21, which enables the distance between the first magnet portion 23 and the second magnet portion 24 forming the magnetic gap 21 to be small, and the structure of the entire speaker 100 may be flat in the width direction of the magnetic gap 21.

Adopt flat voice coil 40, and the axial of flat voice coil 40 is along the width direction of magnetic gap 21, can reduce the width of magnetic gap 21, the space that magnetic gap 21 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 overall dimension, magnetic circuit's volume can be bigger, effect to flat voice coil 40 is better, make vibrating diaphragm 50's vibration range bigger. The increased size of the magnetic circuit system can maintain good acoustic performance of the loudspeaker 100, particularly in cases where the loudspeaker 100 is limited in width dimension.

The speaker 100 may have a square configuration, a circular configuration, an oval configuration, etc. The following description will take the strip structure as an example. As shown in the drawings, the speaker 100 includes two long sides and two short sides (the short sides extend in the width direction of the magnetic gap 21). The length of the long side is greater than the length of the short side. The long and short sides of the flat voice coil 40, diaphragm 50, case 10, and magnetic circuit system correspond to the long and short sides of the speaker 100, respectively.

In one embodiment, the flat voice coil 40 is in an elongated shape to have a long axis section 41 and a short axis section 42, the long axis section 41 corresponds to a long side of the speaker 100, and the short axis section 42 corresponds to a short side of the speaker 100, so that the space utilization rate can be greatly improved. Wherein the long shaft segment 41 may extend in a direction perpendicular to the vibration direction, and the short shaft segment 42 may extend in the vibration direction. For embodiments in which the flat voice coil 40 is elongated, the first wire segment 41 is referred to as the long axis segment 41.

In addition, the first magnet part 23 and the second magnet part 24 in the magnetic circuit system are also in an elongated shape, and the length direction of the first magnet part 23 and the second magnet part 24 is the same as the long axis section 41 of the flat voice coil 40, and after the magnetic circuit system and the flat voice coil 40 are adopted, the loudspeaker 100 can make full use of the magnetic circuit system and the flat voice coil 40 in the form, and the space and the structure are reasonably arranged, so that the loudspeaker can be in a flat shape in the distribution direction of the two first magnet parts 23 and the two second magnet parts 24 on the basis of ensuring the structural compactness, and is in an elongated shape in the length direction of the first magnet part 23 and the second magnet part 24, thereby matching the space of the whole loudspeaker.

With the structure of the flat voice coil 40, the size of the flat voice coil 40 itself in the axial direction is extremely small, so that the magnetic gap 21 between the first magnet portion 23 and the second magnet portion 24 can be sufficiently small, and the size of the short side of the speaker 100 can be made small, forming a flat structure, and better adapting to the space of the whole speaker.

For example, in one embodiment, the speaker 100 is flat in the direction in which the first and second magnet portions 23 and 24 are arranged, the axial direction of the flat voice coil 40 is along the direction in which the first and second magnet portions 23 and 24 are arranged, and the flat voice coil 40 is flat in the axial direction thereof, and the conductive wire of the flat voice coil 40 is arranged in the radial direction thereof. So configured, the housing 10 of the speaker 100 is configured to accommodate the shape of the flat voice coil 40, which is also formed flat to better accommodate the overall space.

In the present embodiment, the axial direction of the flat voice coil 40 is along the width direction of the magnetic gap 21, and the width direction of the magnetic gap 21 refers to the arrangement direction of the first magnet portion 23 and the second magnet portion 24. The axial direction of the flat voice coil 40 is along the arrangement direction of the first magnet portion 23 and the second magnet portion 24.

The axial direction of the flat voice coil 40 may be along the longitudinal direction of the magnetic gap 21. The speaker 100 thus formed is flat in the axial direction of the flat voice coil 40.

The shape of the flat voice coil 40 may be a racetrack type (as shown in fig. 5), an elliptical ring, a circular ring, a square ring, or the like. For example, the flat voice coil 40 is generally elongated, i.e., the flat voice coil 40 is long in length in one radial direction thereof and narrow in width in the other perpendicular radial direction. Among them, the racetrack type, the elliptical ring type, and the rectangular ring type can be considered as several forms of the elongated shape, and such a flat voice coil 40 has a long axis section 41 and a short axis section 42. Correspondingly, the magnetic gap 21 may be elongate. The length of the magnetic gap 21 corresponds to the length of the flat voice coil 40, and the height of the magnetic gap 21 in the vibration direction corresponds to the width of the flat voice coil 40, so that the flat voice coil 40 can fully utilize the space of the magnetic gap 21 to obtain a better driving force.

Specifically, the flat voice coil 40 has a long axis segment 41 and a short axis segment 42, wherein the long axis segment 41 extends along the length direction of the magnetic gap 21, the short axis segment 42 extends along the height direction of the magnetic gap 21, and the axial direction of the flat voice coil 40 extends along the width direction of the magnetic gap 21, so that the space utilization rate can be greatly improved.

Referring to fig. 1, fig. 2 and fig. 4, the diaphragm 50 has a central portion 51, a ring-folded portion 52 surrounding an outer edge of the central portion 51, and an edge portion 53 surrounding an outer edge of the ring-folded portion 52, wherein the ring-folded portion 52 and the edge portion 53 are both ring-shaped.

The plane in which the central portion 51, the edge portion 52, and the edge portion 53 are arranged is substantially parallel to the axial direction of the flat voice coil 40. For example, in an embodiment where flat voice coil 40 is racetrack-shaped, diaphragm 50 may be located on the side of flat voice coil 40 where one of the long shaft segments 41 is located.

Referring to fig. 20, in a conventional speaker 100 ', a diaphragm 50 ' is generally a planar diaphragm 50 ', and the acoustic performance of the speaker 100 ' is closely related to the area of the diaphragm 50, and generally, the larger the area of the diaphragm 50 ', the better the acoustic performance is obtained. Thus, to improve acoustic performance, it is conventional practice to increase the area of the diaphragm 50 'by increasing the circumferential dimension of the loudspeaker 100'. This leads to a large volume of the whole speaker 100', and a large space occupation, which is not favorable for the miniaturization and improvement of the whole speaker.

In view of the above, referring to fig. 1 and fig. 4, in the embodiment of the present invention, the diaphragm 50 is curved and protrudes away from the flat voice coil 40. In this embodiment, diaphragm 50 has a curved shape, which refers to the curvature of diaphragm 50 as a whole, rather than the flexure of flexure 52 itself.

By bending the diaphragm 50, on the one hand, the area of the diaphragm 50 can be increased, so that the effective area of the central portion 51 becomes larger, thereby ensuring the power of the speaker 100 and ensuring the acoustic performance. On the other hand, the way of bending the diaphragm 50 does not need to change the external dimensions of the loudspeaker 100, and does not result in the external dimensions of the loudspeaker 100 being too large, i.e. the structures of other parts of the loudspeaker 100, such as the housing 10, the magnetic circuit system, etc., do not need to be changed, and therefore, normal processing of other parts is not affected.

The shape of the diaphragm 50 can be substantially matched with the shape of the whole machine housing 200, for example, the whole machine housing 200 is in a curved shape, so that the diaphragm 50 in the curved shape can be more matched with the shape of the whole machine housing 200, and the space of the whole machine can be effectively utilized. Thus, the effective vibration area of the center portion 51 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 an embodiment, the diaphragm 50 has a curved shape along the length direction of the magnetic gap 21. In the present embodiment, the two wall surfaces of the magnetic circuit forming the magnetic gap 21 are distributed in the width direction of the magnetic gap 21, and in the embodiment in which the axial direction of the flat voice coil 40 is directed to the wall surfaces of the magnetic circuit forming the magnetic gap 21, the width direction of the magnetic gap 21 is the axial direction of the flat voice coil 40. The direction in which the flat voice coil 40 is directed toward the diaphragm 50, i.e., the vibration direction of the diaphragm 50, is the height direction of the magnetic gap 21. While the diaphragm 50 is not bent in the width direction of the magnetic gap 21. For example, the whole casing 200 is circular, and the diaphragm 50 is curved along the length direction of the magnetic gap 21 to better match the circular whole casing 200.

Referring again to fig. 2, the diaphragm 50 is curved when viewed from the axial direction of the flat voice coil 40, i.e., when viewed from one end of the flat voice coil 40 to the other end. Referring again to fig. 3, the cross-section of the flat voice coil 40 is substantially flat when viewed from the extending direction of the long axis segment 41 of the flat voice coil 40 (the protrusion formed by the stiffening layer and the concave-convex structure formed by the loop portion 52 are not considered here). That is, the curved diaphragm 50 has an aspheric structure, but has a circular arc structure.

In one embodiment, the central portion 51, the loop portion 52 and the edge portion 53 are all curved, and the curvature directions of the central portion 51, the loop portion 52 and the edge portion 53 are the same. Thus, the entire diaphragm 50 is curved, the curved structure of the central portion 51 can increase the effective vibration area, and the curved structure of the edge portion 52 can enhance the structural strength, thereby better connecting the central portion 51 and the edge portion 53; the edge portion 53 is curved, which is advantageous for increasing the contact area between the edge portion 53 and the housing 10 and improving the mounting stability.

The bending curvatures of the central portion 51, the corrugated portion 52, and the edge portion 53 may be the same, so that the overall process may be facilitated.

Since the diaphragm 50 is bent and then protrudes in a direction away from the flat voice coil 40, a space between the diaphragm 50 and the first and second magnet portions 23 and 24 is relatively large, so that the edge of the edge portion 52 itself can protrude toward the flat voice coil 40, thereby preventing the edge portion 52 from protruding out of the housing 10 and causing an excessive height of the speaker 100.

When the speaker 100 is a flat and long strip, the diaphragm 50 is also substantially rectangular, the length direction of the diaphragm 50 is along the long axis section 41 of the flat voice coil 40, and the width direction of the diaphragm 50 is along the axial direction of the flat voice coil 40.

The material of the diaphragm 50 is PEEK or other polymer materials. A reinforcing layer is also provided in the central portion 51 of the diaphragm 50. The reinforcing layer can effectively reduce the split vibration of the diaphragm 50 and reduce noise of the speaker 100.

In the above description, in the case where the curved diaphragm 50 has the same area as the planar diaphragm 50, the size of the entire speaker 100 can be reduced to be smaller by using the curved diaphragm 50 in the embodiment of the present invention, so that the entire size can be smaller. Meanwhile, the flat voice coil 40 occupies a small space, the space saved by the flat voice coil 40 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 40 receives a large magnetic field force in turn, so that the vibrating diaphragm 50 has a good vibrating effect. Therefore, the flat voice coil 40 and the bending diaphragm 50 cooperate with each other to achieve the effect of a smaller size and better acoustic performance of the speaker 100.

Referring to fig. 2 and fig. 3, in an embodiment, each of the first magnet portion 23 and the second magnet portion 24 has a first surface 22 facing the diaphragm 50, the first surface 22 is curved, and a bending direction of the first surface 22 is the same as a bending direction of the diaphragm 50. Optionally, the curvature of the first surface 22 is the same as the curvature of the diaphragm 50. Thus, the curved shape of the magnetic circuit system matches the curved shape of the diaphragm 50, and on one hand, the distance between the first surface 22 and the diaphragm 50 is more uniform at all locations, so that when the diaphragm 50 vibrates up and down, the vibration of the diaphragm 50 can be prevented from being hindered and interfering with the vibration of the diaphragm 50. On the other hand, the arc-shaped magnetic circuit system can make full use of the space below the diaphragm 50, so that the volumes of the first magnet part and the second magnet part can be set as large as possible, and the magnetic field intensity is improved.

In addition, the first surface 22 is curved along the length of the magnetic gap, while the first surface 22 is not curved in the width of the magnetic gap.

For the embodiment of two first magnets 25, the two first magnets 25 are respectively disposed at two ends of the flat voice coil 40, and the magnetic gap 21 is formed between the two first magnets 25, please refer to fig. 8, in which the first surfaces 22 of the two first magnets 25 are curved. In this embodiment, the first magnets 25 at the two ends of the flat voice coil 40 are both bent, so that the first magnets at the two ends are more corresponding to each other, and the magnetic field effect is better.

For embodiments having two second magnets 26 and two third magnets 27 or more magnets, the magnets at the same end of the flat coil 40 are distributed in the up-down direction, so that at least the first surface 22 of the magnet (e.g., the second magnet) closest to the diaphragm 50 is curved, while the first surfaces 22 of the other magnets may be planar or curved.

Referring to fig. 6, in an embodiment, the diaphragm 50 and the flat voice coil 40 are connected by a bracket (60/70), so that the vibration amplitude of the diaphragm 50 is larger.

Referring to fig. 7A and 7B, in order to make the motion of the bracket (60/70) more smooth, the vibration system further includes a centering branch piece (80/80 '), the centering branch piece (80/80') is disposed on a side of the housing 10 away from the diaphragm 50, and the bracket (60/70) is further connected to the centering branch piece 80.

The centering branch piece 80 comprises a fixed section 81 and a supporting section 83, and the fixed section 81 is elastically connected with the supporting section 83. Wherein, the fixed section 81 with the casing 10 is connected, realizes the installation location of centering branch piece 80, prevents that centering branch piece 80 from removing. The supporting section 83 is connected to the bracket (60/70), so that vibration in the vibration direction can be generated relative to the fixing section 81 under the driving of the bracket (60/70).

Taking the up-down direction as an example, the diaphragm 50 is disposed on the upper side of the bracket (60/70), and the centering pad 80 is disposed on the lower side of the bracket (60/70).

After setting up centering disk 80, the downside of support (60/70) is supported by centering disk 80, and joint strength is high to make the motion of support (60/70) more steady, the centering is strong, even the stability that makes flat voice coil loudspeaker voice coil 40 is better, and vibrating diaphragm 50's vibration range is more even, can avoid vibrating diaphragm 50 to produce the polarization, can effectively reduce the noise, helps improving speaker 100's tone quality.

The structure of the centering branch piece 80 in the embodiment of the present invention has various structures, and the following description takes several of them as examples:

referring to fig. 7A, in an embodiment, the centering branch 80 includes a vibration film, the vibration film has a fixing section 81, a bending section 82 and a supporting section 83, the bending section 82 is respectively connected to the fixing section 81 and the supporting section 83, and bends along the vibration direction relative to the fixing section 81 and the supporting section 83; the fixing section 81 is connected to the housing 10, and the supporting section 83 is connected to the bracket 60/70. In this embodiment, the supporting section 83 and the fixing section 81 are elastically deformed by the bending section 82, and the bending section 82 can elastically deform, so as to drive the supporting section 83 to vibrate up and down. Specifically, the bending section 82 may be an arc-shaped section.

In the present embodiment, the structure of the damper 80 is substantially similar to the diaphragm 50, and the principle of generating the up-and-down vibration is substantially the same.

The centering leg 80 has a substantially square shape, and the fixing section 81, the bending section 82 and the supporting section 83 have a shape of an open loop, such as a semicircular shape, a semi-elliptical shape or a half-racetrack shape. The fixed section 81, the bending section 82 and the supporting section 83 are sequentially connected from outside to inside, that is, the bending section 82 is annularly arranged on the outer edge of the supporting section 83, and the fixed section 81 is annularly arranged on the periphery of the bending section 82.

Referring to fig. 7B, in an embodiment, the centering branch 80 ' includes a fixing segment 81 ' and a flexible cantilever 84 connected to each other, the fixing segment 81 ' is connected to the housing 10, and the flexible cantilever 84 is connected to the bracket (60/70). In this embodiment, the supporting section 83 is a flexible cantilever 84, and the flexible cantilever 84 can be elastically deformed relative to the fixing section 81', so as to realize self up and down vibration.

In this embodiment, the fixing section 81 ' may have a substantially square frame shape, and one end of the elastic cantilever 84 is connected to the inner circumference of the fixing section 81 ', and the other end is a free end which can move up and down relative to the fixing section 81 '. In addition, in order to enhance the elasticity, the square fixing section 81 'may be provided with a gap, that is, the fixing section 81' is an unclosed square frame, and the elastic cantilever 84 is provided with two connecting strips corresponding to two sides of the gap. The centering branch piece 80' in the present embodiment may be a metal thin sheet.

Referring again to fig. 6, in one embodiment, the support (60/70) is a conductive member and is electrically connected to the flat voice coil 40. Specifically, the speaker 100 may have two brackets (60/70), namely a first bracket 60 and a second bracket 70, wherein the first bracket 60 and the second bracket 70 are conductive members and are electrically connected to the incoming line end and the outgoing line end of the flat voice coil 40, respectively. The first bracket 60 and the second bracket 70 are made of conductive materials made of metal materials, and can be electrically connected with the flat voice coil 40 on one hand, so that the length of leading-out wires and leading-out wires of the flat voice coil 40 can be shortened; on the other hand, the strength is high, and the elastic vibration cannot be generated, so that the relative position between the flat voice coil 40 and the vibrating diaphragm 50 can be ensured, and the moving stability of the flat voice coil 40 is ensured.

To facilitate electrical connections, the various components within speaker 100 are utilized, and in one embodiment, centering disk 80 is electrically connected to bracket 60/70.

There are various configurations for the electrical connection between the stiffener 80 and the bracket (60/70), for example, in one embodiment, the stiffener 80 is provided with a conductive layer, and the conductive layer is electrically connected to the bracket (60/70). In this embodiment, the conductive layer may be a conductive coating applied on the stiffener 80, or a conductive adhesive adhered on the stiffener 80. For embodiments in which the damper 80 is a vibrating membrane, a conductive coating may be applied to the vibrating membrane. In one embodiment, the stiffener 80 is a conductive member, and the stiffener 80 is electrically connected to the bracket (60/70). This centering support piece 80 adopts metal material to make, plays the centering effect to support (60/70), can also realize the electric conductance of flat voice coil 40 as the electrically conductive piece when, realizes dual function.

Referring to fig. 8, the speaker 100 further includes a flexible circuit board 90(FPCB board), and the centering branch piece 80 is electrically connected to the flexible circuit board 90. For example, the spider 80 may be coated with a conductive coating to electrically connect to the flexible circuit board 90, and the flexible circuit board 90 is electrically connected to the whole device to electrically connect the flat voice coil 40.

Referring to fig. 9, the flexible circuit board 90 is supported on a surface of the damper 80 away from the diaphragm 50, and supports the damper 80. Taking the centering pad 80 as a vibrating membrane as an example, the flexible circuit board 90 may be supported on a bottom surface of the vibrating membrane (a surface of the vibrating membrane facing away from the vibrating membrane 50) and extend along the fixing section 81 of the vibrating membrane, for example, the flexible circuit board 90 is U-shaped, and the flexible circuit board 90 is attached to the bottom surface of the fixing section 81, and may support and fix the fixing section 81 at the bottom surface. Meanwhile, the bending section 82 and the supporting section 83 are avoided, and the obstruction to the up-and-down vibration of the supporting section 83 is avoided. Of course, when the stiffener 80 itself is a conductive member, the flexible circuit board 90 may be supported below the stiffener 80.

Referring to fig. 10, the magnetic circuit system includes a magnetic yoke 30, a supporting rib 31 is disposed on the magnetic yoke 30, and the flexible circuit board 90 is disposed on the supporting rib 31, so that the supporting section 83 and the bending section 82 are spaced apart from the magnetic yoke 30, and a movement space is provided for the vertical vibration of the supporting section 83.

Referring to fig. 10 and 11, the housing 10 includes a main body case 12 and a limiting case 13, the main body case 12 extends along an edge of the diaphragm 50, the limiting case 13 is connected to a side of the main body case 12 away from the diaphragm 50 and extends into the accommodating space, and the limiting case 13 abuts against a surface of the centering sheet 80 facing the diaphragm 50.

In this embodiment, the main body case 12 is substantially annular, and a notch is opened on the bottom surface of the main body case 12, the limit case 13 is located at the notch, and the upper surface of the limit case 13 abuts against the edge of the notch of the main body case 12, so that the main body case 12 presses the limit case 13 thereunder to prevent the limit case 13 from moving upwards. In addition, the gap of the main body case 12 is further provided with an insertion groove 121, the limiting case 13 is formed with a dowel 131, and the dowel 131 is inserted into the insertion groove 121 to limit the limiting case 13 to move along the circumferential direction of the main body case 12.

After the limiting shell 13 abuts against the surface of the centering branch piece 80 facing the vibrating diaphragm 50, the centering branch piece 80 can be prevented from moving upwards, and meanwhile, the centering branch piece 80 is clamped between the limiting shell 13 and the flexible circuit board 90, so that the vertical limiting of the centering branch piece 80 is realized.

In this embodiment, the limiting shell 13 also extends along the fixing section 81 of the centering branch 80 and avoids the supporting section 83 and the bending section 82. The stopper housing 13 may be U-shaped.

In the above embodiment, in which the stiffener 80 is a conductive member, the stiffener 80 may be a flexible circuit board 90, so that the function of the flexible circuit board 90 can be maximized, and the number of components in the speaker 100 is reduced.

In an embodiment of the present invention, the connection manner between the bracket (60/70) and the centralizer plates 80 is various, for example, please refer to fig. 7A, 9 and 13, in an embodiment, the centralizer plates 80 are provided with mounting holes 85, and the bracket (60/70) (for example, the first bracket 60) is provided with inserting tongues 64 inserted into the mounting holes 85. Specifically, the tongue 64 has a plug section and an abutting section connected, the plug section being inserted into the mounting hole 85, the abutting section abutting against the surface of the supporting section 83 of the centering leg 80 facing the diaphragm 50. To enhance the connection effect, the abutting section and the supporting section 83 may be connected by glue or double-sided tape.

Referring to fig. 12, alternatively, in an embodiment, the bracket (60/70) (e.g., the second bracket 70) has a mounting plate 74 facing the stiffener 80, and a plate surface of the mounting plate 74 abuts against the stiffener 80. Specifically, the mounting plate 74 abuts against the support section 83 or the elastic cantilever 84 of the centralizer sheet 80, which may be bonded by glue or double-sided adhesive.

For embodiments employing two centralizers 80 and two brackets (60/70), the first bracket 60 and the centralizers 80 may be connected by inserting the insertion tongue 64 into the mounting hole 85, and the second bracket 70 and the centralizers 80 may be connected by abutting the mounting plate 74 against the centralizers 80.

Since the bracket (60/70) is moved up and down, it is conceivable that the bracket (60/70) is connected to the damper 80 at a position where the damper 80 can vibrate up and down, i.e., at the support section 83, such as the support section 83 of the vibration film, or at the elastic cantilever 84.

Referring to fig. 6 and 14, in order to improve stability, in an embodiment, the vibration system includes two brackets (60/70) and two centering pads 80, and the two brackets (60/70) and the two centering pads 80 are disposed in a one-to-one correspondence. Of course, in other embodiments, a single bracket and a single centering disk 80 may be provided, or a single bracket and multiple centering disks 80 may be provided.

Specifically, one of the two supports is a first support 60, the other of the two supports is a second support 70, and the first support 60 is connected to the diaphragm 50 and the flat voice coil 40, respectively; the second support 70 is spaced apart from the first support 60 and is connected to the diaphragm 50 and the flat voice coil 40, respectively.

In this embodiment, the first bracket 60 and the second bracket 70 are spaced apart in a direction perpendicular to the vibration direction. For example, the first and second brackets 60 and 70 are distributed along the extending direction of the long axis section 41. Likewise, two centering fins 80 are also distributed along the extending direction of the long shaft section 41.

The first support 60 and the second support 70 may have the same structure, and of course, the first support 60 and the second support 70 may have different structures, as long as the connection between the diaphragm 50 and the flat voice coil 40 can be realized to drive the diaphragm 50 to vibrate.

In the invention, after the first support 60 and the second support 70 are arranged, the flat voice coil 40 can be supported by the first support 60 and the second support 70, and a plurality of support positions are provided, so that the condition that two ends of the flat voice coil 40 shake can be avoided, the polarization problem of a product can be effectively solved, and the product performance can be improved.

In an embodiment, the first support 60 and the second support 70 are respectively disposed near two opposite sides of the flat voice coil 40, the two opposite sides in this embodiment refer to two opposite sides along a radial direction of the flat voice coil 40, and the distribution direction of the first support 60 and the second support 70 is perpendicular to the vibration direction. Specifically, the speaker 100 is in an elongated shape, the flat voice coil 40 is correspondingly in an elongated shape to have a long axis section 41 and a short axis section 42, the long axis section 41 corresponds to a long side of the speaker 100, an extending direction of the long axis section 41 is perpendicular to the vibration direction, the short axis section 42 corresponds to a short side of the speaker 100, and the short axis section 42 extends along the vibration direction. The first bracket 60 and the second bracket 70 are distributed along the long shaft section 41.

The first support 60 and the second support 70 are respectively arranged on two opposite sides of the length direction of the flat voice coil 40, so that the flat voice coil 40 can be supported in the length direction, and the flat voice coil 40 can be better prevented from shaking.

Referring to fig. 14 again, in an embodiment, the first support 60 and the second support 70 are respectively connected to two end surfaces of the flat voice coil 40. Specifically, the end face of the flat voice coil 40 refers to a surface extending around the axial direction thereof, and the two end faces refer to two surfaces distributed along the axial direction thereof. The first holder 60 is connected to one end surface of the flat voice coil 40, the second holder 70 is connected to the other end surface of the flat voice coil 40, and the first holder 60 and the second holder 70 hold the flat voice coil 40 therebetween and perform a bidirectional limit function on the flat voice coil 40 in the axial direction of the flat voice coil 40.

Referring to fig. 12 and 13 again, in an embodiment, the first bracket 60 has a first connecting plate 61, and the first connecting plate 61 is attached to an end surface of the flat voice coil 40. The second holder 70 has a second connecting plate 71, and the second connecting plate 71 is attached to the end surface of the flat voice coil 40. In this embodiment, the terminal surface of first connecting plate 61 and flat voice coil 40 belongs to the contact of face and face, and second connecting plate 71 also belongs to the contact of face and face with the terminal surface of flat voice coil 40 equally, and area of contact is bigger, therefore connection stability is higher, and simultaneously, big to flat voice coil 40's spacing area, has the better effect that prevents flat voice coil 40 and rock.

In one embodiment, the first bracket 60 further has a third connecting plate 62, and the third connecting plate 62 is attached to the central portion 51. The second bracket 70 further has a fourth web 72, the fourth web 72 being attached to the central portion 51. Since the diaphragm 50 has a curved shape, the third connecting plate 62 and the fourth connecting plate 72 may be obliquely disposed along the curved surface of the diaphragm 50 in order to make the first support 60 and the second support 70 better contact with the diaphragm 50. In this embodiment, the third connecting plate 62 is in surface contact with the diaphragm 50, and the fourth connecting plate 72 is also in surface contact with the diaphragm 50, so that a larger connecting area can be provided.

The first connecting plate 61 and the second connecting plate 71 extend substantially in the vibration direction, and the third connecting plate 62 and the fourth connecting plate extend substantially in the direction perpendicular to the vibration direction.

After the first support 60 and the second support 70 are disposed, a gap is formed between the flat voice coil 40 and the diaphragm 50, and the diaphragm 50 is in a suspended state at the gap, so that the diaphragm can vibrate more freely and more flexibly.

The first bracket 60 further has a first connecting rib 63, the first connecting rib 63 connects the first connecting plate 61 and the third connecting plate 62, respectively, and the first connecting plate 61 and the third connecting plate 62 are arranged at intervals in the vibration direction. The second bracket 70 further has a second connecting rib 73, the second connecting rib 73 is respectively connected with the second connecting plate 71 and the fourth connecting plate 72, and the second connecting plate 71 and the fourth connecting plate 72 are arranged at intervals in the vibration direction.

Referring to fig. 15 and 16, the flat voice coil 40 has a sensing section 43 and two connecting sections 44 respectively disposed at two ends of the sensing section 43, the sensing section 43 is located in the magnetic gap 21, and the connecting sections 44 extend out of the magnetic gap 21 along the length direction of the magnetic gap 21. In this embodiment, the lengths of the first and second magnet portions 23 and 24 are substantially equal to the length of the inductive section 43, the inductive section 43 is located within the magnetic field region, and the connecting section 44 is located outside the magnetic field region. For example, the sensing section 43 is referred to as the long shaft section 41, and the connecting section 44 is referred to as the short shaft section 42.

In one embodiment, the first bracket 60 and the second bracket 70 are located outside the magnetic gap 21 and connected to the corresponding connecting segments 44. Therefore, the first bracket 60 and the second bracket 70 do not occupy the space of the magnetic gap 21, the magnetic field intensity can be increased, and the performance is improved.

In one embodiment, the first support 60 and the second support 70 are conductive members and are electrically connected to the wire inlet end and the wire outlet end of the flat voice coil 40, respectively. The first bracket 60 and the second bracket 70 are made of conductive materials made of metal materials, and can be electrically connected with the flat voice coil 40 on one hand, so that the length of leading-out wires and leading-out wires of the flat voice coil 40 can be shortened; on the other hand, the strength is high, and the elastic vibration cannot be generated, so that the relative position between the flat voice coil 40 and the vibrating diaphragm 50 can be ensured, and the moving stability of the flat voice coil 40 is ensured.

In one embodiment, the first bracket 60 and the second bracket 70 are rigid members. For example, the first bracket 60 and the second bracket 70 may be made of stainless steel or copper. The rigidity piece can fine assurance intensity, prevents self deformation and produces and rock.

Referring to fig. 1 and 2 in combination, the housing 10 in the embodiment of the present invention forms an accommodating space for accommodating and fixing the vibration system and the magnetic circuit system. Specifically, the casing 10 extends in a ring shape along the outer edge of the magnetic yoke 30. The edge portion 53 of the diaphragm 50 is typically connected to the housing 10, i.e., the housing 10 is disposed around the edge portion 53 of the diaphragm 50. In addition, the casing 10 is further connected to the magnetic conductive yoke 30, and the casing 10 and the magnetic conductive yoke 30 together enclose to form a structure that is open toward the diaphragm 50. It should be noted that the annular housing 10 refers to a completely closed ring shape or a non-completely closed ring shape.

The casing 10 extends along the outer edge of the magnetic yoke 30 in a ring shape and is connected to the magnetic circuit system and the vibration system, respectively. For example, the edge portion 53 of the diaphragm 50 is typically connected to the housing 10, i.e., the housing 10 is disposed around the edge portion 53 of the diaphragm 50. In addition, the casing 10 is further connected to the magnetic conductive yoke 30, and the casing 10 and the magnetic conductive yoke 30 together enclose to form a structure that is open toward the diaphragm 50. It should be noted that the annular housing 10 refers to a completely closed ring shape or a non-completely closed ring shape.

Referring to fig. 3 again, the housing 10 has a first end surface 11 close to the edge portion 53, the first end surface 11 is curved, and the curvature direction of the first end surface 11 is the same as the curvature direction of the diaphragm 50, i.e. the first end surface 11 is also convex in the direction away from the flat voice coil 40. Optionally, the first end surface 11 and the diaphragm 50 have the same curvature. The structure formed in this way has a higher degree of engagement with the whole machine housing 200 and a higher utilization rate of space.

Please refer to fig. 17, the present invention further provides an electronic device, which includes a housing 200 and a speaker 100, and the structure of the speaker 100 is referred to the above embodiments and is not repeated 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.

The housing 200 may have a curved shape, and the curved direction of the housing 200 is the same as the curved direction of the diaphragm 50 of the loudspeaker 100. Alternatively, the curvature of the housing 200 is the same as the curvature of the diaphragm 50. So, the crooked radian of vibrating diaphragm 50 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 50, can promote space utilization by a wide margin.

When the first end face 11 of the casing 10 of the speaker 100 is curved, the shape of the whole speaker 100 is curved, so that the shape of the speaker 100 can be perfectly matched with the circular dial, the space utilization rate is greatly improved, and the performance of the speaker 100 is improved. Meanwhile, the arc-shaped appearance design of the loudspeaker 100 in the embodiment of the invention can not only improve the acoustic performance of the loudspeaker 100, but also shorten the sound outlet pipeline distance between the loudspeaker 100 and the dial plate sound outlet hole 201 of the watch, reduce airflow sound and improve the audio effect of the whole watch.

The following description takes an electronic device as a watch as an example:

fig. 21 and 22 show the schematic structure of the conventional speaker 100 'mounted on the circular dial plate, as can be seen from the figure, for the circular watch, since the conventional speaker 100' is of a straight-edge structure, the surface of the side where the diaphragm 50 'of the speaker 100' is located is substantially a straight surface, when the speaker 100 'is mounted on the circular dial plate, the shape coverage is not well compatible, the space waste is large, that is, a sector space is wasted between the first end surface 11 of the casing 10 and the circular housing 200, which is not beneficial to improving the performance of the speaker 100', and since the distance of the sound outlet pipe between the speaker 100 and the sound outlet 201 is long, the sound outlet effect of the whole watch is further affected.

Fig. 19 shows a schematic structural diagram of the speaker 100 mounted on the circular dial in the embodiment of the present invention, and it is apparent from the figure that the curvature of the first end 11 of the casing 10 of the speaker 100 can be matched with the circular housing 200 of the circular dial, i.e. the casing 10 of the speaker 100 can extend along the circular housing 200, and the two are in sealing abutment. Thus, after the curved casing 10 is adopted, the casing 10 can reasonably utilize the wasted fan-shaped space in the conventional structure, and the space is used as the vibration space of the diaphragm 50, so that the vibration space of the diaphragm 50 is increased without increasing the installation space of the loudspeaker 100, the volume of the front sound cavity of the loudspeaker 100 is also increased, and the acoustic performance is favorably improved. In addition, because the loudspeaker 100 can utilize the fan-shaped space as a part of the front sound cavity, the space directly faces the diaphragm 50, and the sound outlet holes 201 on the casing 200 can be directly opened facing the diaphragm 50, so that the sound is directly radiated without turning through the pipe section, thereby shortening the sound outlet pipe distance between the loudspeaker 100 and the dial sound outlet holes 201, reducing the airflow sound, and improving the audio effect of the whole machine.

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.