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,扬声器包括振膜以及驱动振膜振动的扁平音圈,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；其中,扁平音圈的两相对侧各设有一个第一磁铁,两个第一磁铁的磁极异性相对形成位于上部的第一磁间隙和位于下部的第二磁间隙；或者,扁平音圈的两相对侧各设有一个第二磁铁和一个第三磁铁,两个第二磁铁的磁极异性相对形成第一磁间隙,两个第三磁铁的磁极异性相对形成第二磁间隙；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。本发明技术方案能够保证扬声器较小尺寸的同时,提升其声学性能。(The invention discloses a loudspeaker and electronic equipment, wherein the loudspeaker 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 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 two opposite sides of the flat voice coil are respectively provided with a first magnet, and the magnetic poles of the two first magnets are opposite to form a first magnetic gap at the upper part and a second magnetic gap at the lower part; or two opposite sides of the flat voice coil are respectively provided with a second magnet and a third magnet, the magnetic poles of the two second magnets are opposite to form a first magnetic gap, and the magnetic poles of the two third magnets are opposite to form a second magnetic gap; 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 technical scheme of the invention can ensure that the loudspeaker is smaller in size and simultaneously improve the acoustic performance of the loudspeaker.)

1. A loudspeaker is characterized by comprising a vibrating diaphragm and a flat voice coil for driving the vibrating diaphragm to vibrate, wherein 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; wherein the content of the first and second substances,

two opposite sides of the flat voice coil are respectively provided with a first magnet, and the magnetic poles of the two first magnets are opposite to form a first magnetic gap at the upper part and a second magnetic gap at the lower part; alternatively, the first and second electrodes may be,

two opposite sides of the flat voice coil are respectively provided with a second magnet and a third magnet, the magnetic poles of the two second magnets are opposite to each other to form a first magnetic gap, and the magnetic poles of the two third magnets are opposite to each other to form a second magnetic gap;

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.

2. The loudspeaker of claim 1, wherein the first magnet is bi-directionally magnetized perpendicular to the vibration direction such that the first magnet has a first magnetic pole orientation and a second magnetic pole orientation aligned along the vibration direction, the first magnetic pole orientation being opposite 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.

3. The loudspeaker of claim 1, wherein the magnetic poles of the second and third magnets on the same side of the flat voice coil are arranged in opposite directions.

4. 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.

5. The loudspeaker of claim 1, wherein the height of the second magnet is greater than or equal to the height of the corresponding first wire segment, and the height of the third magnet is greater than or equal to the height of the corresponding first wire segment, along the vibration direction.

6. The speaker of claim 1, wherein the second magnet and the third magnet located on the same side are disposed at intervals in the vibration direction.

7. The loudspeaker of claim 1, wherein the first magnet, the second magnet, and the third magnet are each fixed to a housing.

8. The speaker of claim 7, wherein the speaker has a flat elongated shape, and the first magnet, the second magnet, and the third magnet have a longitudinal direction corresponding to a longitudinal direction of the speaker;

the flat voice coil has a long axis section extending in a length direction of the first magnet or the second magnet, and a short axis section extending in the vibration direction.

9. The loudspeaker of any one of claims 1 to 8, wherein the diaphragm is curved along the length of the magnetic gap;

the loudspeaker also comprises a shell, the shell forms an accommodating space for accommodating the vibration system and the magnetic circuit system, and the edge part of the diaphragm is connected with the shell;

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 speaker of claim 9, 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.

11. An electronic device comprising a housing and a loudspeaker according to any one of claims 1 to 9, 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. Larger dimensions are relatively more acoustically effective and smaller dimensions are relatively less acoustically effective.

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

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 space is wasted, which is not favorable for 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 diaphragm and a flat voice coil for driving the diaphragm to vibrate, wherein 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; wherein the content of the first and second substances,

two opposite sides of the flat voice coil are respectively provided with a first magnet, and the magnetic poles of the two first magnets are opposite to form a first magnetic gap positioned at the upper part and a second magnetic gap positioned at the lower part; alternatively, the first and second electrodes may be,

two opposite sides of the flat voice coil are respectively provided with a second magnet and a third magnet, the magnetic poles of the two second magnets are opposite to form a first magnetic gap, and the magnetic poles of the two third magnets are opposite to form a second magnetic gap;

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.

Optionally, the first magnet is bidirectionally charged perpendicular to the vibration direction so that the first magnet has a first magnetic pole orientation and a second magnetic pole orientation distributed 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.

Optionally, in the second magnet and the third magnet located on the same side of the flat voice coil, the magnetic poles of the magnets are distributed in opposite directions.

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, in the vibration direction, the height of the second magnet is greater than or equal to the height of the corresponding first wire segment, and the height of the third magnet is greater than or equal to the height of the corresponding first wire segment.

Optionally, the second magnet and the third magnet located on the same side are arranged at intervals along the vibration direction.

Optionally, the first magnet, the second magnet and the third magnet are respectively fixed to a housing.

Optionally, the speaker is in a flat and long shape, and the length directions of the first magnet, the second magnet and the third magnet correspond to the length direction of the speaker;

the flat voice coil has a long axis section extending in a length direction of the first magnet or the second magnet, and a short axis section extending in the vibration direction.

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

the loudspeaker also comprises a shell, wherein the shell forms an accommodating space for accommodating the vibration system and the magnetic circuit system, and the edge part of the vibrating diaphragm is connected with the shell;

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 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.

In the invention, only one first magnet is respectively arranged on two opposite sides of the flat voice coil, the number of the first magnets is relatively less, and because the first magnets are one integral piece, compared with the mode that a plurality of magnets are sequentially arranged to form the first magnets, no mounting hole or other gaps are required to be reserved in the middle, the area of the first magnets is larger, the strength of the magnets can be increased, meanwhile, the contact area of the first magnets and other structures is larger, and the connection stability is higher. In addition, a complete first magnet only needs to be connected with the shell or other parts, and no assembly process is arranged in the magnet, so that the assembly frequency is low, the process is simple, and the reliability is high.

Or, through setting up two magnets in the same side of flat voice coil loudspeaker voice coil, can be according to the setting position of each magnet of the size adjustment of flat voice coil loudspeaker voice coil along the direction of vibration, play the effect of the shape of better cooperation flat voice coil loudspeaker voice coil. And the second magnet and the third magnet can be respectively adjusted to the position of a section of conductive wire corresponding to the flat voice coil, and the second magnet and the third magnet can be spaced in the hollow area of the flat voice coil, so that the volume of the magnets can be reduced, and the using amount of the magnets can be saved.

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 along the major axis 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 structural view of a part of the structure of the speaker of fig. 3;

fig. 9 is a front view of the structure of the speaker portion of fig. 3;

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

FIG. 11 is an assembled view of the first carrier, the second carrier and the flat voice coil of FIG. 10;

FIG. 12 is a schematic view of the speaker and the whole device shown in FIG. 1;

fig. 13 is a sectional view of a conventional speaker;

FIG. 14 is a schematic view of a conventional speaker and a complete set assembled together;

fig. 15 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 described with reference to the accompanying drawings.

Detailed Description

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

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

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

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

Referring to fig. 1 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.

The magnetic circuit system is provided with a magnetic gap 24, the vibration system comprises 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 24, 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 extends transversely, and the flat voice coil 40 moves in the magnetic gap 24 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 40 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 24, so that the distance between the magnets forming the magnetic gap 24 can be made small, and the structure of the entire speaker 100 can be flat in the width direction of the magnetic gap 24.

Adopt flat voice coil 40, and the axial of flat voice coil 40 is along the width direction of magnetic gap 24, can reduce the width of magnetic gap 24, the space that magnetic gap 24 occupy diminishes promptly, thereby the corresponding inner space who has saved speaker 100, make speaker 100 inside have bigger space holding magnetic circuit, so can improve its acoustic performance through increasing the magnetic circuit size, promptly under the prerequisite that does not increase speaker 100 appearance size, magnetic circuit's volume can be bigger, effect to flat voice coil 40 is better, make the vibration range of vibrating diaphragm 50 bigger. Especially in the case where the width dimension of the speaker 100 is limited, the magnetic circuit system is increased in size to maintain good acoustic performance of the moving-coil acoustic transducer.

The shape of the flat voice coil 40 may be a racetrack type, an elliptical ring type, a circular ring type, a square ring type, or the like. For example, the flat voice coil 40 may be generally elongated, i.e., the flat voice coil 40 is longer in length in one radial direction thereof and narrower in width in another perpendicular radial direction. Among them, the race type, the elliptical ring type, and the rectangular ring type can be regarded as several forms of the long strip type. Correspondingly, the magnetic gap 24 may be elongate. The length of the magnetic gap 24 corresponds to the length of the flat voice coil 40, and the width of the magnetic gap 24 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 24 to obtain a better driving force.

Referring to fig. 6, in particular, 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 24, the short axis segment 42 extends along the height direction of the magnetic gap 24, and the axial direction of the flat voice coil 40 extends along the width direction of the magnetic gap 24, so that the space utilization rate can be greatly improved.

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, wherein the corrugated portion 52 and the edge portion 53 are both annular.

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. 13, 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 becomes larger, thereby ensuring the power of the speaker 100 and ensuring the acoustic performance. On the other hand, in this way of bending the diaphragm 50, there is no need to change the external dimensions of the loudspeaker 100, which will not result in the external dimensions of the loudspeaker 100 being too large, i.e. the structure of other parts of the loudspeaker 100, such as the housing 10, the magnetic circuit system, etc., need not be changed, and therefore, the normal processing of other parts will not be affected.

The shape of the diaphragm 50 can be substantially matched with the overall housing 200, for example, the overall housing 200 is curved, so that the curved diaphragm 50 can be more matched with the overall housing 200, and the overall space can be effectively utilized. Thus, the effective vibration area of the center portion 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 one embodiment, the diaphragm 50 has a curved shape along the length direction of the magnetic gap 24. In the present embodiment, the direction of distribution of the two wall surfaces of the magnetic circuit forming the magnetic gap 24 is the width direction of the magnetic gap 24, and in the embodiment in which the axial direction of the flat voice coil 40 is directed to the wall surface of the magnetic circuit forming the magnetic gap 24, the width direction of the magnetic gap 24 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 24. While the diaphragm 50 is not curved in the width direction of the magnetic gap 24. For example, the entire casing 200 has a circular ring shape, and the diaphragm 50 may be better matched with the circular ring-shaped entire casing 200 by being bent along the length direction of the magnetic gap 24.

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 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 magnet is relatively 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.

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, after the curved diaphragm 50 according to the embodiment of the present invention is adopted, the size of the entire speaker 100 can be reduced to be smaller, so that the size of the entire speaker 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.

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. 3 and 4, in the first embodiment, the magnetic circuit system includes two first magnets 21, specifically, two opposite sides of the flat voice coil 40 are respectively provided with one first magnet 21, the magnetic poles of the two first magnets 21 are opposite to each other to form a first magnetic gap 25 at the upper portion and a second magnetic gap 26 at the lower portion, that is, the first magnetic gap 25 is formed between the upper portions of the two first magnets 21, and the first magnetic gap 25 is formed between the lower portions of the two first magnets 21.

In this embodiment, the opposite polarities of the magnetic poles mean that the ends of the two magnets close to each other are respectively an N pole and an S pole. For example, the two first magnets 21 are distributed in the left-right direction, the left end of the left first magnet 21 is an S pole, and the right end is an N pole; the left end of the right first magnet 21 is an S pole, and the right end is an N pole.

In this embodiment, only one first magnet 21 is disposed on each of two opposite sides of the flat voice coil 40, the number of the first magnets 21 is relatively small, and because the first magnet 21 is a complete piece of the first magnet 21, compared with the way that a plurality of magnets are sequentially arranged to form the first magnet 21, no mounting hole or other gaps need to be left in the middle, so that the area of the first magnet 21 is larger, the strength of the magnet can be increased, and meanwhile, the contact area between the first magnet 21 and other structures is also larger, and the connection stability is higher. In addition, a complete first magnet 21 only needs to be connected with the housing 10 or other parts, and no assembly process is required in the interior of the first magnet, so that the assembly frequency is low, the process is simple, and the reliability is high.

The opposite sides of the flat voice coil 40 may be both ends distributed in the axial direction, i.e., the end faces of the first magnets 21 facing the flat voice coil 40. After the structure of the flat voice coil 40 is adopted, because the size of the flat voice coil 40 in the axial direction is extremely small, the distance between the two first magnets 21 can be small, that is, the magnetic gap 24 can be small enough, so that the size of the loudspeaker 100 in the direction can be small, a flat structure is formed, and the loudspeaker is better suitable for the space of the whole machine.

For example, in one embodiment, the speaker 100 is flat in the distribution direction of the two first magnets 21, the axial direction of the flat voice coil 40 is along the distribution direction of the two first magnets 21, and the flat voice coil 40 is flat in the axial direction thereof, and the conductive wire of the flat voice coil 40 is distributed along 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.

The flat voice coil 40 has two first lead segments 41 spaced apart along the vibration direction, and the two first lead segments 41 are respectively located in the first magnetic gap 25 and the second magnetic gap 26. That is, one of the first wire segments 41 is located in the first magnetic gap 25, and the other first wire segment 41 is located in the second magnetic gap 26, 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 be given taking a rectangular structure as an example. As shown in fig. 1 and 3, the speaker 100 includes two long sides and two short sides (the short sides extend in the width direction of the magnetic gap 24). 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 speaker 100 is in the shape of a flat strip. Specifically, the first magnet 21 extends in an elongated shape along the extending direction of the diaphragm 50. The flat voice coil 40 has a long axis segment 41 extending in the longitudinal direction of the first magnet 21, and a short axis segment 42 extending in the vibration direction. Thus, the utilization rate of the space can be greatly improved. Moreover, after the magnetic circuit system and the flat voice coil 40 in this form are adopted, the loudspeaker 100 can make full use of the magnetic circuit system and the flat voice coil 40 in this form, reasonably arrange the space and the structure, and ensure the structural compactness, so that the loudspeaker can be flat in the distribution direction of the two first magnets 21 and long in the length direction of the first magnets 21, thereby matching the space of the whole loudspeaker.

In embodiments where the flat voice coil 40 is elongated, the first wire segment 41 is referred to as a long shaft segment 41.

In one embodiment, the height of the flat voice coil 40 in the vibration direction is less than or equal to the height of the first magnet 21, and when the diaphragm 50 is in a static state, i.e., not vibrating, the upper and lower sides of the flat voice coil 40 are located in the upper and lower sides of the first magnet 21 and do not exceed or only exceed a very small portion of the upper and lower sides of the first magnet 21. Thus, the magnetic field force applied to the flat voice coil 40 can be as large as possible, and the driving effect on the diaphragm 50 is better.

In the present embodiment, the width direction of the magnetic gap 24 refers to the arrangement direction of the two first magnets 21. The axial direction of the flat voice coil 40 is along the arrangement direction of the two first magnets 21.

The axial direction of the flat voice coil 40 may be along the longitudinal direction of the magnetic gap 24.

The magnetic circuit system may further include a magnetic yoke 30, and the first magnet 21 is disposed on the magnetic yoke 30.

To further improve the acoustic performance, in one embodiment, the first magnet 21 is magnetized bidirectionally perpendicular to the vibration direction, so that the first magnet 21 has a first magnetic pole orientation and a second magnetic pole orientation distributed along the vibration direction, the first magnetic pole orientation being opposite to the second magnetic pole orientation. 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. Wherein the left-right direction is perpendicular to the vibration direction.

In this embodiment, the first magnetic pole orientations of the two first magnets 21 correspond to each other, and the second magnetic pole orientations of the two first magnets 21 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 25 is formed between the first magnetic pole orientations of the two first magnets 21 and a second magnetic gap 26 is formed between the second magnetic pole orientations of the two first magnets 21.

The following is specifically illustrated by an example:

the first magnetic pole orientations are distributed at one end of the first magnet 21 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 21 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 21 away from the diaphragm 50, and the S pole and the 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 21 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, that is, the magnetic pole polarities of the two second magnetic pole orientations are opposite.

Thus, the direction of the magnetic field force received by the flat voice coil 40 at the first magnetic pole orientation is the same as the direction of the magnetic field force received at the second magnetic pole orientation, and the two magnetic field forces are superposed with each other, so that the magnetic field force received by 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 22 and two third magnets 23, specifically, two opposite sides of the flat voice coil 40 are respectively provided with one second magnet 22 and one third magnet 23, the magnetic polarities of the two second magnets 22 are opposite to each other to form the first magnetic gap 25, and the magnetic polarities of the two third magnets 23 are opposite to each other to form the second magnetic gap 26.

In this embodiment, one side of the flat voice coil 40 is provided with one second magnet 22 and one third magnet 23, and the other opposite side is also provided with one second magnet 22 and one third magnet 23.

By arranging the two magnets on the same side of the flat voice coil 40, the arrangement positions of the magnets can be adjusted according to the size of the flat voice coil 40 in the vibration direction, and the effect of better matching the shape of the flat voice coil 40 is achieved. Moreover, the second magnet 22 and the third magnet 23 can be respectively adjusted to the position corresponding to one section of the conductive wire of the flat voice coil 40, and the second magnet 22 and the third magnet 23 can be spaced in the hollow area of the flat voice coil 40, so that the magnet volume can be reduced, and the using amount of the magnets can be saved.

In one embodiment, the magnetic poles of the second magnet 22 and the third magnet 23 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 22 on the left side is an N pole, the right end is an S pole, and the left end of the third magnet 23 on the left side is an S pole, and the right end is an N pole.

The flat voice coil 40 has two first lead segments 41 spaced apart along the vibration direction, wherein one of the first lead segments 41 is located between the two second magnets 22, and the other of the first lead segments 41 is located between the two third magnets 23.

After the arrangement, the direction of the magnetic field force applied between the two second magnets 22 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 23 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.

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.

Of course, the second magnet 22 and the third magnet 23 may correspond to the same first conductor segment.

In one embodiment, along the vibration direction, the height of the second magnet 22 is greater than or equal to the height of the corresponding first wire segment 41, and the height of the third magnet 23 is greater than or equal to the height of the corresponding first wire segment 41. In this manner, when the diaphragm 50 is in a rest state, i.e., not vibrating, the upper long axis segment 41 is located substantially in the space between the two second magnets 22 and does not extend beyond or only extends a very small portion of the upper and lower sides of the second magnets 22. The lower long shaft portion 41 is located substantially in the space between the two third magnets 23 and does not extend beyond or only extends to a very small extent beyond the upper and lower sides of the third magnets 23. Therefore, the magnetic field force applied to the long shaft section 41 can be as large as possible, and the driving effect on the diaphragm 50 is better.

In one embodiment, the second magnet 22 and the third magnet 23 located on the same side are spaced apart along the vibration direction. Alternatively, the gap is formed to avoid the long shaft portion 41, so that the force applied to the flat voice coil 40 is not affected by the gap between the second magnet 22 and the third magnet 23. Meanwhile, the using amount of the magnet can be reduced.

In the present embodiment, the width direction of the magnetic gap 24 refers to the arrangement direction of the two second magnets 22. The axial direction of the flat voice coil 40 is along the arrangement direction of the two second magnets 22.

In one embodiment, the speaker 100 has a flat and long shape, and the longitudinal directions of the first magnet 21, the second magnet 22 and the third magnet 23 correspond to the longitudinal direction of the speaker.

In one embodiment, the first magnet 21, the second magnet 22 and the third magnet 23 are fixed to the housing 10, respectively. In this embodiment, the first magnet 21, the second magnet 22, and the third magnet 23 are fixed to the inner surface of the casing 10 extending in the vibration direction. For the second embodiment, the second magnet 22 and the third magnet 23 located on the same side are respectively adhered to the same inner side surface of the housing 10, and the second magnet 22 and the third magnet 23 located on the other same side are respectively adhered to the other same inner side surface of the housing 10.

The casing 10 extends along the outer edge of the magnetic yoke 30 and is connected to the magnetic path system and the vibration system. 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.

The housing 10 has a first end surface 11 close to the edge portion 53, the first end surface 11 is curved, and the direction of curvature of the first end surface 11 is the same as the direction of curvature of the diaphragm 50, i.e. the first end surface 11 also protrudes away from the flat voice coil 40. Alternatively, 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, the center portion 51 and the edge portion 52 of the diaphragm 50 are lower than the first end surface 11, and a vibration gap is formed between the center portion 51 and the first end surface 11 along a vibration direction. In the present 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 on the extending path of 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 corrugated 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 is also on the extending path not protruding 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 (referred to as the thickness direction of the diaphragm 50).

Referring to fig. 10, in an 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 21, the second magnet 22, or the third magnet 23 is substantially equal to the length of the inductive section 43, the inductive section 43 is located in the magnetic field region, and the connecting section 44 is located outside the magnetic field region. For example, the sensing segment 43 is referred to as the long shaft segment 41 and the connecting segment 44 is referred to as the short shaft segment 42. In this way, the first magnet 21, the second magnet 22, or the third magnet 23 does not protrude inside the short shaft section 42 of the flat voice coil 40.

Referring to fig. 8 to 11, 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 arranged, 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 brackets 61 and the second brackets 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, where the two opposite sides in this embodiment refer to two opposite sides along a radial direction of the flat voice coil 40, and a distribution direction of the first support 61 and the second support 62 is perpendicular to a 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 the long side of the speaker 100, the extending direction of the long axis section 41 is perpendicular to the vibration direction, the short axis section 42 corresponds to the 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 clamp 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. 12, 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 be a wearable electronic device, such as a watch, and the electronic device may be an earphone, a mobile phone, a notebook computer, a VR device, an AR device, a television, or the like.

The housing 200 has 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. 14 and 15 are schematic diagrams illustrating a structure of a conventional speaker 100 'mounted on a circular dial plate, as is apparent from the diagrams, 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 plate, the speaker cannot be well conformal and is relatively large in space waste, i.e., 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 a sound outlet pipe between the speaker 100 and the sound outlet 201 is relatively long, the sound outlet effect of the whole watch is further affected.

Fig. 12 is a schematic diagram showing the structure of the speaker 100 mounted on the circular dial in the embodiment of the present invention, and it is apparent from the diagram 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 contact. 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.