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,其中,扬声器包括磁路系统和振动系统,振动系统包括振膜和扁平音圈,扁平音圈的轴向垂直于振膜的振动方向,振膜呈弯曲形状,并朝远离扁平音圈的方向凸出；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；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；第一磁体部分和第二磁体部分均具有面向振膜的第一表面,第一表面呈弯曲形状,其弯曲方向与振膜的弯曲方向相同。(The invention discloses a loudspeaker and electronic equipment, wherein the loudspeaker comprises a magnetic circuit system and a vibration system, the vibration system comprises a vibrating diaphragm and a flat voice coil, the axial direction of the flat voice coil is vertical to the vibration direction of the vibrating diaphragm, and the vibrating diaphragm is in a bent shape and protrudes towards the direction far away from the flat voice coil; 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; 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; the first magnet portion and the second magnet portion each have a first surface facing the diaphragm, the first surface having a curved shape with a curved direction identical to a curved direction of the diaphragm.)

1. A loudspeaker comprising a vibration system and a magnetic circuit system, wherein,

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

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 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;

the first magnet portion and the second magnet portion each have a first surface facing the diaphragm, the first surface having a curved shape, and a curved direction of the first surface being the same as a curved direction of the diaphragm.

2. A loudspeaker as claimed in claim 1, characterized in that the curvature of the first surface is the same as the curvature of the diaphragm.

3. The loudspeaker of claim 1, wherein 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 first surfaces of the two first magnets are both in a curved shape.

4. A loudspeaker according to claim 1, wherein the magnetic circuit has a second surface facing away from the diaphragm, the second surface being a flat surface.

5. The loudspeaker of claim 4, wherein the magnetic circuit further comprises a magnetic yoke, the magnet being disposed on the magnetic yoke, the magnetic yoke having the second surface.

6. The loudspeaker of claim 5 wherein the surfaces of the magnet and the yoke that contact each other are flat.

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. The speaker according to claim 1, wherein an orthographic projection of either one of the first magnet portion and the second magnet portion on the end face of the flat voice coil is located at an inner periphery of the flat voice coil in both ends in a length direction thereof; and/or the presence of a gas in the gas,

the flat voice coil is in a strip shape and is provided with a long shaft section extending along the length direction of the magnetic gap and a short shaft section extending along the height direction of the magnetic gap.

9. The speaker according to any one of claims 1 to 8, further comprising a case forming a housing space for housing the vibration system and the magnetic circuit system, wherein an edge portion of the diaphragm is connected to the case;

the shell is provided with a first end face close to the edge portion, the first end face is in a bent shape, and the direction of the bent radian of the first end face is the same as that of the bent radian of the diaphragm.

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

11. The speaker of claim 1, further comprising: a first support and a second support connecting the diaphragm and the flat voice coil;

the flat voice coil is provided with an induction section and two connecting sections which are respectively arranged at two ends of the induction section, the induction section is positioned in the magnetic gap, and the connecting sections extend out of the magnetic gap along the length direction of the magnetic gap;

the first support and the second support are located outside the magnetic gap and connected with the corresponding connecting sections.

12. An electronic device comprising a housing and a loudspeaker according to any one of claims 1 to 11, 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

For a moving coil speaker, the acoustic performance is directly related to the size of the moving coil speaker. The larger the size the better the acoustic effect is relatively, and the smaller the size the worse the acoustic effect is relatively.

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.

For example, for an electronic device having a circular housing, since conventional speakers are all straight-sided structures, when the speaker is installed in a circular dial, the conventional speaker cannot be well shaped and compatible, and the space waste is large, which is not beneficial to improving the performance of the speaker.

Disclosure of Invention

The invention mainly aims to provide a loudspeaker, aiming at ensuring the small size of the loudspeaker and improving the acoustic performance of the loudspeaker.

In order to achieve the above object, the speaker provided by the present invention includes a magnetic circuit system and a vibration system, wherein the vibration system includes a diaphragm and a flat voice coil for driving the diaphragm to vibrate, an axial direction of the flat voice coil is perpendicular to a vibration direction of the diaphragm, and the diaphragm is in a curved shape and protrudes in a direction away from the flat voice coil;

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 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;

the first magnet portion and the second magnet portion each have a first surface facing the diaphragm, the first surface having a curved shape, and a curved direction of the first surface being the same as a curved direction of the diaphragm.

Optionally, the curvature of the first surface is the same as the curvature of the diaphragm.

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 magnetic circuit system has a second surface facing away from the diaphragm, and the second surface is a flat surface.

Optionally, the magnetic circuit system further comprises a magnetic yoke, the magnet being disposed on the magnetic yoke, the magnetic yoke having the second surface.

Optionally, the contact surface between the magnet and the magnetic yoke is a flat surface.

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, an orthographic projection of the magnet on the end face of the flat voice coil is located on the inner periphery of the flat voice coil at two ends in the length direction; and/or the flat voice coil is in a long strip shape and is provided with a long shaft section extending along the length direction of the magnetic gap and a short shaft section extending along the height direction of the magnetic gap.

Optionally, the loudspeaker further comprises a housing, the housing forms a receiving space for receiving the vibration system and the magnetic circuit system, and the edge portion of the diaphragm is connected with the housing;

the shell is provided with a first end face close to the edge portion, the first end face is in a bent shape, and the direction of the bent radian of the first end face is the same as that of the bent radian of the diaphragm.

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

Optionally, the speaker further comprises: a first support and a second support connecting the diaphragm and the flat voice coil;

the flat voice coil is provided with an induction section and two connecting sections which are respectively arranged at two ends of the induction section, the induction section is positioned in the magnetic gap, and the connecting sections extend out of the magnetic gap along the length direction of the magnetic gap;

the first support and the second support are located outside the magnetic gap and connected with the corresponding connecting sections.

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, the bending shape of the magnet is matched with that of the vibrating diaphragm, on one hand, the distance between the first surface and the vibrating diaphragm is more uniform at each position, and when the vibrating diaphragm vibrates up and down, the vibration of the vibrating diaphragm can be prevented from being hindered and interfering with the vibration of the vibrating diaphragm. On the other hand, the space below the vibrating diaphragm can be fully utilized by the arc-shaped magnetic circuit system, so that the volume of the magnetic circuit system can be set to be larger as much as possible, and the magnetic field intensity is 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 segment of the flat voice coil;

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

FIG. 4 is a schematic plan view of the speaker of FIG. 3;

fig. 5 is a schematic plan view of another embodiment of the loudspeaker according to the invention;

FIG. 6 is a schematic view of the flat voice coil of FIG. 3;

FIG. 7 is a schematic structural diagram of the diaphragm in FIG. 3;

FIG. 8 is a schematic view of the first magnet of FIG. 3;

fig. 9 is a schematic structural view of a part of the structure of the speaker of fig. 3;

fig. 10 is a front view of the speaker portion of fig. 3;

fig. 11 is a bottom view of the speaker portion of fig. 3;

FIG. 12 is an assembled view of the first carrier, the second carrier and the flat voice coil of FIG. 9;

FIG. 13 is a schematic view of the speaker and the whole device shown in FIG. 1;

fig. 14 is a sectional view of a conventional speaker;

FIG. 15 is a schematic view of a conventional speaker and a complete set assembled together;

fig. 16 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 4, 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. 4, 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, 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. 5 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. 6 and fig. 7, 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 flat voice coil 40 is used to drive the diaphragm 50 to vibrate. The flat voice coil 40 may be directly connected to the diaphragm 50, or the flat voice coil 40 may be connected to the diaphragm 50 through other components, such as a bracket.

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 number of conductive wire layers in the axial direction of the flat voice coil is smaller than the number of conductive wire coils in the radial direction of the flat voice coil. In this embodiment, the conductive wires of the flat voice coil 40 are distributed along the radial direction, i.e. wound in the radial direction. 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 width direction of the magnetic gap in the present embodiment refers to the distribution direction of the first magnet portion 23 and the second magnet portion 24.

The flat voice coil has two first wire segments 41 distributed at intervals along the vibration direction, the two first wire segments 41 are respectively located in the first magnetic gap 28 and the second magnetic gap 29, that is, one of the first wire segments 41 is located in the first magnetic gap 28, and the other first wire segment is located in the second magnetic gap 29, so that the two first wire segments 41 are both subjected to magnetic field forces in the same direction, and have a superimposed effect on the vibration of the diaphragm.

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 fig. 1, 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.

Referring to fig. 6 again, in an embodiment, the flat voice coil 40 is elongated 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, so that the utilization rate of space can be greatly improved.

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 first magnet part 23 and the second magnet part 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, and the whole machine space is matched.

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.

Referring to fig. 2 and fig. 7 again, the vibration system further includes a diaphragm 50, where the diaphragm 50 has a central portion 51, a corrugated portion 52 annularly disposed on an outer edge of the central portion 51, and an edge portion 53 annularly disposed on an outer edge of the corrugated portion 52, where the corrugated portion 52 and the edge portion 53 are both annular.

Referring to fig. 14, 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 this, referring to fig. 7, in the embodiment of the present invention, the diaphragm 50 is curved and protrudes in a direction 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 is increased, thereby ensuring the power of the loudspeaker 100 and ensuring the acoustic performance. On the other hand, the manner of bending the diaphragm 50 does not require changing the circumferential dimension of the loudspeaker 100, and does not result in an oversize external dimension of the loudspeaker 100, i.e., the structure of other parts of the loudspeaker 100, such as the housing 10, the magnetic circuit system, etc., does 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 this embodiment, the arrangement direction of the first magnet portion 23 and the second magnet portion 24 is the width direction of the magnetic gap 21, and the vibration direction of the diaphragm is the depth 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 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 to fig. 3, when viewed from the extending direction of the long axis segment 41 of the flat voice coil 40, the cross section of the flat voice coil 40 is substantially flat (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 cylindrical curved surface 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. Alternatively, the bending curvatures of the central portion 51, the corrugated portion 52, and the edge portion 53 may be the same, so that the integral processing 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 magnetic circuit system is large, so that the edge of the edge portion 52 itself protrudes 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.

The diaphragm 50 may be generally rectangular in shape, with the length direction of the diaphragm 50 being along the long axis of the flat voice coil 40 and the width direction of the diaphragm 50 being 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 foregoing, after the flat voice coil 40 is adopted, the magnetic gap 21 between the first magnet portion 23 and the second magnet portion 24 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 overall 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 50 is larger. 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 according to the embodiment of the present invention, so that the size of the entire speaker can be reduced to 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.

The case 10 forms a housing space for housing the vibration system and the magnetic circuit system, and the edge portion 53 of the diaphragm 50 is connected to the case 10. 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 housing 10 is further connected to the magnetic conductive yoke 30, or connected to the first and second magnet portions 23 and 24, and the housing 10, the magnetic conductive yoke 30, and the first and second magnet portions 23 and 24 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 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 also protrudes in a 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.

In one embodiment, along the bending direction of the diaphragm, the center portion 51 and the edge portion 52 of the diaphragm 50 at corresponding positions are lower than the first end surface 11, and a vibration gap along the vibration direction is formed between the center portion 51 and the first end surface 11. In this embodiment, the central portion 51 and the folded ring portion 52 are lower than the first end surface 11, which means that the central portion 51 and the folded ring portion 52 are accommodated in the accommodating space formed by the housing 10 and do not protrude from the first end surface 11 of the housing 10. Thus, when the speaker 100 is mounted on the whole casing 200, the speaker 100 abuts against the whole casing 200 through the casing 10 itself or the seal ring on the casing 10, and the center portion 51 and the edge portion 52 of the diaphragm 50 are spaced from the whole casing 200 through the vibration gap, which provides a large vibration space for the vibration of the center portion 51 and prevents the diaphragm 50 from interfering with the whole casing 200.

In one embodiment, the edge portion 53 is connected to the inner wall surface of the housing 10, and a surface of the edge portion 53 facing away from the voice coil is flush with the first end surface 11 or lower than the first end surface 11. That is, similarly, the edge portion 53 does not protrude from the first end surface 11, and the position where the edge portion 53 is connected is on the inner wall surface of the housing 10, so that it is possible to avoid an increase in the overall height of the speaker 100 (which refers to the thickness direction of the diaphragm 50).

In the present embodiment, the edge portion 53 extends from the end connected to the loop portion 52 in a direction away from the flat voice coil 40 along the inner wall surface of the casing 10, so as to have a larger contact area with the inner wall surface of the casing 10. The surface of the edge portion 53 flush with the first end surface 11 refers to the surface of the edge portion 53 farthest from the flat voice coil 40, i.e., the top surface of the edge portion 53.

Referring to fig. 3, in an embodiment, the first magnet portion and the second magnet portion each have 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. 2 again, in an embodiment, the magnetic circuit system has a second surface 31 facing away from the diaphragm 50, and the second surface 31 is a flat surface. Specifically, the magnetic circuit system further includes a magnetic yoke 30, the first and second magnet portions being disposed on the magnetic yoke 30, the magnetic yoke 30 having the second surface 31. Therefore, the second surface 31 is similar to the outer surface of the loudspeaker, the outer side of the second surface adopts a plane design, the loudspeaker can keep a regular shape, and the second surface can be tightly combined with a battery, a mainboard and the like during the assembly of the whole machine, so that the space utilization rate is improved, the size of the battery is increased, and the endurance time is prolonged. By planar surface is meant herein that the surfaces lie in the same plane.

In addition, the surfaces of the first and second magnet portions 23 and 24 that contact the yoke 30 are flat surfaces. Specifically, the side of the first magnet portion or the second magnet portion facing away from the first surface 22 is a flat surface, the surface of the magnetic conductive yoke 30 facing the diaphragm 50 is a flat surface, and the contact surfaces of the first magnet portion 23, the second magnet portion 24 and the magnetic conductive yoke 30 are more regular, so that the first magnet portion and the second magnet portion can be tightly combined when being assembled.

Referring to fig. 2 again, in an embodiment, a surface of the flat voice coil 40 facing the diaphragm 50 is lower than the lowest point of the first surface 22. Optionally, the surface of flat voice coil 40 facing diaphragm 50 is flush with the lowest surface of first surface 22. In this embodiment, the highest point of the first surface 22 refers to the highest protruding position, i.e., the position farthest from the yoke 30, and the lowest point refers to the position closest to the yoke 30. After the arrangement, the long shaft section 41 of the flat voice coil 40 can be ensured to be positioned in the magnetic gap 21, the magnetic field force received by the long shaft section 41 is ensured to be large enough, and the vibration effect of the diaphragm 50 is improved.

Referring to fig. 10, in an embodiment, the orthogonal projections of the first magnet portion 23 and the second magnet portion 24 on the end face of the flat voice coil 40 are located at the inner periphery of the flat voice coil 40 along both ends in the length direction. The width direction of the first magnet portion 23 and the second magnet portion 24 refers to the width direction of the magnetic gap 21, and the height direction of the first magnet portion 23 and the second magnet portion 24 refers to the direction in which the flat voice coil 40 is directed to the diaphragm 50. In this embodiment, the first magnet portion 23 and the second magnet portion 24 have a longitudinal direction, the longitudinal direction of which extends along the extending direction of the diaphragm 50 and along the end face of the flat voice coil 40, and the ends of the first magnet portion 23 and the second magnet portion 24 in the longitudinal direction thereof are flush with the inner peripheral surface of the flat voice coil 40, or the ends of the first magnet portion 23 and the second magnet portion 24 in the longitudinal direction thereof correspond to the inside of the flat voice coil 40 with a gap from the inner peripheral surface of the flat voice coil 40. That is, the length of either one of the first magnet portion 23 and the second magnet portion 24 is less than or equal to the length of the inner peripheral surface of the flat voice coil 40. As such, the first magnet portion 23 and the second magnet portion 24 do not extend beyond the inner side of the short shaft section 42 of the flat voice coil 40. Since the directions of the magnetic fields received by the two short axial segments 42 (extending in the up-down direction) of the flat voice coil 40 are opposite, the short axial segments 42 hardly contribute to the vibration of the diaphragm 50, and therefore, the first magnet portion 23 and the second magnet portion 24 can be disposed not beyond the short axial segments 42. Meanwhile, the stub shaft segment 42 of the flat voice coil 40 can be connected to the diaphragm 50 through a bracket or other structure, where the first magnet portion 23 and the second magnet portion 24 are not disposed at the stub shaft segment 42, and the space is large, so that sufficient space can be provided for mounting the bracket, and thus, the speaker volume does not need to be additionally increased.

In one embodiment, 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 length of the first magnet portion 23 or the second magnet portion 24 is substantially equal to the length of the induction section 43, the induction section 43 is located within the magnetic field region, and the connection 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. As such, the first magnet portion 23 or the second magnet portion 24 does not extend beyond the inner side of the short shaft section 42 of the flat voice coil 40.

Referring to fig. 9 to 12, in an embodiment, the speaker further includes a first bracket 61 and a second bracket 62 connecting the diaphragm 50 and the flat voice coil 40. In the invention, after the first support 61 and the second support 62 are arranged, the flat voice coil 40 can be supported by the first support 61 and the second support 62, and a plurality of supporting 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 is effectively solved, and the product performance is improved.

In the present embodiment, the first bracket 61 and the second bracket 62 are spaced apart in a direction perpendicular to the vibration direction. For example, the first and second brackets 61 and 62 are distributed along the extending direction of the long axis section 41.

In an embodiment, the first support 61 and the second support 62 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 first support 61 and the second support 62 are distributed in a direction 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 61 and the second bracket 62 are distributed along the long shaft section 41, and the first bracket 61 and the second bracket 62 are respectively arranged at two ends of the long shaft section 41.

The first support 61 and the second support 62 are respectively arranged on two opposite sides of the flat voice coil 40 in the length direction, so that the flat voice coil 40 can be supported in the length direction, and the flat voice coil 40 is prevented from shaking better.

In one embodiment, the first support 61 and the second support 62 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 support 61 is connected to one end face of the flat voice coil 40, the second support 62 is connected to the other end face of the flat voice coil 40, and the first support 61 and the second support 62 sandwich the flat voice coil 40 therebetween to perform a bidirectional limiting function on the flat voice coil 40 in the axial direction of the flat voice coil 40.

The first support 61 and the second support 62 may have the same structure, and of course, the first support 61 and the second support 62 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 one embodiment, the first bracket 61 and the second bracket 62 are located outside the magnetic gap 21 and connected to the corresponding connecting segments 44. Therefore, the first support 61 and the second support 62 do not occupy the space of the magnetic gap 21, the magnetic field intensity can be increased, and the performance is improved.

Please refer to fig. 13, 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.

Wherein the housing 200 has a curved shape, and a curved direction of the housing 200 is the same as a curved direction of the diaphragm 50 of the speaker 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. 15 and 16 show a schematic structural diagram of a conventional speaker 100 'mounted on a circular dial, as is apparent from the drawing, for a circular watch, since the conventional speaker 100' is of a straight-edge structure, and the surface of the side of the speaker 100 'where the diaphragm 50' is located is substantially a flat surface, when the speaker 100 'is mounted on the circular dial, the speaker cannot be well conformal-compatible, and the space waste is large, that is, there is a waste of a sector space 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 further affects the sound output effect of the whole watch because the distance between the speaker 100 and the sound output hole 201 is long.

Fig. 13 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.