CN113473330A

CN113473330A - Speaker and electronic apparatus

Info

Publication number: CN113473330A
Application number: CN202010248995.9A
Authority: CN
Inventors: 蔡晓东; 张鹏; 张琳琳
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2021-10-01

Abstract

The invention discloses a loudspeaker and electronic equipment, wherein the loudspeaker comprises a vibration system and a magnetic circuit system, the magnetic circuit system comprises a first magnetic group, a second magnetic group and a third magnetic group which are sequentially arranged along the vibration direction of the vibration system, and the first magnetic group comprises two first magnets with opposite magnetic poles and arranged at intervals; the second magnetic group comprises two second magnets which are arranged at intervals, two magnetic poles of the second magnets are distributed along the vibration direction, and the magnetic pole distribution directions of the two second magnets are opposite; the third magnetic group comprises two third magnets with opposite magnetic poles and arranged at intervals; the first magnet, the second magnet and the third magnet which are positioned on the same side form a Halbach array, and the opposite side of the two Halbach arrays is a magnetic field enhancement side; the interval between the two first magnets and the interval between the two third magnets form a first magnetic gap and a second magnetic gap respectively; the vibration system comprises a vibrating diaphragm and a flat voice coil, wherein the axial direction of the flat voice coil is perpendicular to the vibration direction.

Description

Speaker and electronic apparatus

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 of the present invention comprises a vibration system and a magnetic circuit system, wherein the magnetic circuit system comprises a first magnetic group, a second magnetic group and a third magnetic group sequentially arranged along a vibration direction of the vibration system, wherein,

the first magnetic group comprises two first magnets with opposite magnetic poles and arranged at intervals;

the second magnetic group comprises two second magnets which are arranged at intervals, two magnetic poles of the second magnets are distributed along the vibration direction, and the magnetic pole distribution directions of the two second magnets are opposite;

the third magnetic group comprises two third magnets with opposite magnetic poles and arranged at intervals;

the first magnet, the second magnet and the third magnet which are positioned on the same side form a Halbach array, and the opposite side of the two Halbach arrays is a magnetic field enhancement side;

the interval between the two first magnets and the interval between the two third magnets respectively form a first magnetic gap and a second magnetic gap which are arranged along the vibration direction;

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, the flat voice coil is provided with two first wire sections which are distributed at intervals along the vibration direction, and the two first wire sections are respectively positioned in the first magnetic gap and the second magnetic gap;

the diaphragm is in a curved shape and protrudes in a direction away from the flat voice coil.

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

Optionally, of the first magnet and the second magnet located on the same side of the flat voice coil, the magnetic pole of the second magnet adjacent to the first magnet is the same as the magnetic pole of the first magnet adjacent to the other first magnet.

Optionally, the first magnetic group, the second magnetic group and the third magnetic group are fixed in an adhering manner.

Optionally, the diaphragm is curved along the length direction 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.

Optionally, the speaker is flat in an axial direction of the flat voice coil, the axial direction of the flat voice coil is along a distribution direction of the two first magnets, and the flat voice coil is flat in the axial direction thereof, and the conductive wire of the flat voice coil is distributed along a radial direction thereof.

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

Optionally, the first magnet, the second magnet and the third magnet respectively extend along the extension direction of the diaphragm to be in a long strip shape;

the first lead wire section is a long-axis section extending along the length direction of the first magnet, and the flat voice coil further comprises a short-axis section extending along the vibration direction.

Optionally, the height of the first wire segment along the vibration direction, which is arranged corresponding to the first magnet, is less than or equal to the height of the first magnet along the vibration direction;

and the height of the first conducting wire segment, which is arranged corresponding to the third magnet, along the vibration direction is less than or equal to the height of the third magnet along the vibration direction.

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.

After the diaphragm is bent, on one hand, the area of the diaphragm can be increased, so that the effective area of the central part is increased, the power of the loudspeaker is ensured, and the acoustic performance is ensured. On the other hand, the mode of bending the diaphragm does not need to change the external dimension of the loudspeaker, and does not cause the external dimension of the loudspeaker to be overlarge, namely, the structures of other parts of the loudspeaker, such as the shell, the magnetic circuit system and the like, do not need to be changed, so that the normal processing of other parts is not influenced. The shape of the vibrating diaphragm can be generally matched with the shape of the whole machine shell, for example, the whole machine shell is in a bent shape, so that the vibrating diaphragm in the bent shape can be more matched with the shape of the whole machine shell, and the space of the whole machine is effectively utilized. Therefore, under the condition that the installation space of the loudspeaker is fixed, the effective vibration area of the central part is increased, so that the power of the loudspeaker is ensured, and the acoustic performance is ensured.

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 the long axis of the flat voice coil;

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

FIG. 4 is a schematic view of the flat voice coil of FIG. 3;

FIG. 5 is a schematic structural diagram of the diaphragm in FIG. 3;

FIG. 6 is a schematic plan view of the speaker of FIG. 3;

fig. 7 is a schematic structural view of a part of the structure of the speaker of fig. 3;

fig. 8 is a front view of the structure of the speaker portion of fig. 3;

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

FIG. 10 is an assembled view of the first carrier, the second carrier and the flat voice coil of FIG. 9;

FIG. 11 is a schematic view of the speaker and the whole device shown in FIG. 1;

fig. 12 is a sectional view of a conventional speaker;

FIG. 13 is a schematic view of a conventional speaker and a complete set assembled together;

fig. 14 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.

Wherein, the magnetic circuit system forms a magnetic gap 43, the vibration system includes a diaphragm 50 and a flat voice coil 60 for driving the diaphragm 50 to vibrate, the flat voice coil 60 is located in the magnetic gap 43, and the flat voice coil 60 drives the diaphragm 50 to vibrate up and down under the action of the magnetic circuit system.

The flat voice coil 60 is used to drive the diaphragm 50 to vibrate. The flat voice coil 60 may be directly connected to the diaphragm 50, or the flat voice coil 60 may be connected to the diaphragm 50 through other components, such as a bracket.

The axial direction of the flat voice coil 60 is perpendicular to the vibration direction of the diaphragm 50, for example, in some embodiments, the axial direction of the flat voice coil 60 extends transversely, and the flat voice coil 60 moves in the magnetic gap 43 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 60 means that the flat voice coil 60 is flat in the axial direction thereof. Specifically, the width between the inner peripheral surface and the outer peripheral surface of the flat voice coil 60 is larger than the thickness of the flat voice coil 60 in the axial direction.

The flat voice coil 60 is formed by winding a conductive wire, and the number of conductive wire layers in the axial direction of the flat voice coil 60 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 60 are distributed along the radial direction, i.e., wound in the radial direction. The height of the flat voice coil 60 in the axial direction of the flat voice coil 60 is small, for example, in the axial direction of the flat voice coil 60, the number of layers formed by winding the conductive wire of the flat voice coil 60 may be one or a small number of layers, so that the thickness of the flat voice coil 60 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 60 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 60 form the flat structure that axial thickness is little, radial width is big.

For example, the axial direction of the flat voice coil 60 is along the width direction of the magnetic gap 43, so that the distance between the magnets forming the magnetic gap 43 can be made small, and the structure of the entire speaker 100 can be flat in the width direction of the magnetic gap 43.

Adopt flat voice coil 60, and the axial of flat voice coil 60 is along the width direction of magnetic gap 43, can reduce the width of magnetic gap 43, the space that magnetic gap 43 occupy diminishes promptly, thereby the corresponding inner space of having saved speaker 100, make speaker 100 inside have bigger space holding magnetic circuit, so can improve its acoustic performance through increasing 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 60 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 increased size of the magnetic circuit system can maintain good acoustic performance of the moving-coil acoustic transducer.

The shape of the flat voice coil 60 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 60 may be generally elongated, i.e., the flat voice coil 60 is longer in length in one radial direction thereof and narrower in width in the other 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 43 may be elongate. The length of the magnetic gap 43 corresponds to the length of the flat voice coil 60, and the width of the magnetic gap 43 corresponds to the width of the flat voice coil 60, so that the flat voice coil 60 can fully utilize the space of the magnetic gap 43 and obtain a better driving force.

Referring to fig. 4, specifically, the flat voice coil 60 has a long axis segment 61 and a short axis segment 62, wherein the long axis segment 61 extends along the length direction of the magnetic gap 43, the short axis segment 62 extends along the height direction of the magnetic gap 43, and the axial direction of the flat voice coil 60 extends along the width direction of the magnetic gap 43, so that the space utilization rate can be greatly improved.

Referring to fig. 1 and fig. 5, the diaphragm 50 has a central portion 51, a ring-folded 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 ring-folded portion 52, wherein the ring-folded portion 52 and the edge portion 53 are both ring-shaped.

The plane in which the central portion 51, the edge portion 52, and the edge portion 53 are arranged is substantially parallel to the axial direction of the flat voice coil 60. For example, in an embodiment where flat voice coil 60 is racetrack-shaped, diaphragm 50 may be located on the side of flat voice coil 60 where one of the long shaft segments 61 is located.

Referring to fig. 12, 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. 5, in the embodiment of the present invention, the diaphragm 50 is curved and protrudes in a direction away from the flat voice coil 60. In this embodiment, diaphragm 50 has a curved shape, which refers to the curvature of diaphragm 50 as a whole, rather than the flexure of flexure 52 itself.

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

The shape of the diaphragm 50 can be substantially matched with the shape of the whole machine housing 200, for example, the whole machine housing 200 is in a curved shape, so that the diaphragm 50 in the curved shape can be more matched with the shape of the whole machine housing 200, and the space of the whole machine can be effectively utilized. Thus, the effective vibration area of the center portion 51 is increased under the condition that the installation space of the speaker 100 is constant, so that the power of the speaker 100 is ensured and the acoustic performance is ensured.

In order to better adapt to the curved shape of the whole casing 200, in one embodiment, the diaphragm 50 has a curved shape along the length direction of the magnetic gap 43. In the present embodiment, the two wall surfaces of the magnetic circuit forming the magnetic gap 43 are distributed in the width direction of the magnetic gap 43, and in the embodiment in which the axial direction of the flat voice coil 60 is directed to the wall surface of the magnetic circuit forming the magnetic gap 43, the width direction of the magnetic gap 43 is the axial direction of the flat voice coil 60. The direction in which the flat voice coil 60 is directed toward the diaphragm 50, i.e., the vibration direction of the diaphragm 50, is the height direction of the magnetic gap 43. While the diaphragm 50 is not bent in the width direction of the magnetic gap 43. For example, the whole casing 200 is circular, and the diaphragm 50 is curved along the length direction of the magnetic gap 43 to better match the circular whole casing 200.

Referring again to fig. 2, the diaphragm 50 is curved when viewed from the axial direction of the flat voice coil 60, i.e., when viewed from one end of the flat voice coil 60 to the other end. Referring again to fig. 3, the cross-section of the flat voice coil 60 is substantially flat when viewed from the extending direction of the long axis section 61 of the flat voice coil 60 (the protrusion formed by the stiffening layer and the concave-convex structure formed by the loop part 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 60, a space between the diaphragm 50 and the magnet is large, so that the edge of the edge portion 52 itself protrudes toward the flat voice coil 60, 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 61 of the flat voice coil 60, and the width direction of the diaphragm 50 is along the axial direction of the flat voice coil 60.

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

In the above description, in the case where the curved diaphragm 50 has the same area as the planar diaphragm 50, the size of the entire speaker 100 can be reduced to be smaller by using the curved diaphragm 50 in the embodiment of the present invention, so that the entire size can be smaller. Meanwhile, the flat voice coil 60 occupies a small space, the space saved by the flat voice coil 60 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 60 receives a large magnetic field force in turn, so that the diaphragm 50 has a good vibration effect. Therefore, the flat voice coil 60 and the curved diaphragm 50 cooperate with each other to achieve the effect of a smaller size and better acoustic performance of the speaker 100.

Referring to fig. 3 and 6 in combination, in an embodiment, the magnetic circuit system includes a first magnetic group 20, a second magnetic group 30, and a third magnetic group 40 sequentially arranged along a vibration direction of the vibration system, wherein,

the first magnetic group 20 comprises two first magnets 21 with opposite magnetic poles and arranged at intervals;

the second magnetic group 30 comprises two second magnets 31 arranged at intervals, two magnetic poles of the second magnets 31 are distributed along the vibration direction, and the magnetic poles of the two second magnets 31 are distributed in opposite directions;

the third magnetic group 40 comprises two third magnets 41 with opposite magnetic poles and arranged at intervals;

the first magnet 21, the second magnet 22 and the third magnet 23 which are positioned on the same side form a Halbach array, and the opposite side of the two Halbach arrays is a magnetic field enhancement side;

the interval between two of the first magnets 21 constitutes a first magnetic gap 44, the interval between two of the third magnets 41 constitutes a second magnetic gap 45, and the first magnetic gap 44 and the second magnetic gap 45 are arranged in the vibration direction.

Halbach Array (Halbach Array) is a new type of arrangement of permanent magnets. The permanent magnets of different magnetization directions are arranged in a sequence such that the magnetic field is significantly enhanced on one side of the array and significantly reduced on the other side.

In the present embodiment, the two magnetic poles of the first magnet 21 are distributed in the direction perpendicular to the vibration direction, and the two magnetic poles of the third magnet 41 are also distributed in the direction perpendicular to the vibration direction.

The opposite 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 left end of one of the first magnets 21 is an N pole, the right end thereof is an S pole, and the left end of the other first magnet 21 is an S pole, and the right end thereof is an N pole. The same applies to the two third magnets 41. In the present embodiment, the first magnet 21 is magnetized in a direction perpendicular to the vibration direction, and the third magnet 41 is also magnetized in a direction perpendicular to the vibration direction.

The two second magnets 31 have opposite magnetic pole distribution directions, that is, one end of one of the second magnets 31 close to the diaphragm 50 is an N pole, and one end of the other second magnet 31 far from the diaphragm 50 is an S pole, and correspondingly, one end of the other second magnet 31 close to the diaphragm 50 is an S pole, and one end of the other second magnet far from the diaphragm 50 is an N pole. Wherein, two second magnets 31 in the second magnetic group 30 are magnetized along the vibration direction,

in the above, the first magnet 21, the second magnet 31 and the third magnet 41 are sequentially arranged along the vibration direction, the second magnet 31 is located between the first magnet 21 and the third magnet 41, and the second magnet 31 and the first magnet 21 and the third magnet 41 may be disposed at an interval or the three may be sequentially attached.

In one embodiment, the magnetic poles of the first magnet 21 and the third magnet 41 on the same side of the flat voice coil 60 are distributed in opposite directions. For example, the first magnet 21 has an N-pole at the left end and an S-pole at the right end, and the third magnet 41 has an S-pole at the left end and an N-pole at the right end. With this arrangement, the direction of the magnetic field force received by the long axis section 61 above the flat voice coil 60 in the first magnet assembly 20 is the same as the direction of the magnetic field force received by the long axis section 61 below the flat voice coil 60 in the third magnet assembly 40, so as to achieve a superimposed effect, thereby better driving the diaphragm 50 to vibrate.

In one embodiment, of the first magnet 21 and the second magnet 31 located on the same side of the flat voice coil 60, the magnetic pole of the second magnet 31 adjacent to the first magnet 21 is the same as the magnetic pole of the first magnet 21 adjacent to the other first magnet 21. For example, the magnetic pole of the first magnet 21 on the left side adjacent to the first magnet 21 on the right side is an N-pole, and the magnetic pole of the second magnet 31 on the left side adjacent to the first magnet 21 on the left side is also an N-pole.

Thus, the flat voice coil 60 is driven to vibrate up and down reciprocally in the first magnetic gap 44 between the two first magnets 21 and the second magnetic gap 45 between the two third magnets 41, and when the flat voice coil 60 moves to the gap between the two second magnets 31, an opposite force is applied to the flat voice coil 60 due to the opposite magnetic field directions, thereby limiting the vibration amplitude of the flat voice coil 60. In addition, the second magnetic group 30 may increase the magnetic flux density in the magnetic gap 43 and reduce the leakage flux of the first magnetic group 20 and the third magnetic group 40 in order to separate the first magnetic group 20 and the third magnetic group 40.

In one embodiment, the first magnetic group 20, the second magnetic group 30 and the third magnetic group 40 are attached to each other. For example, the first magnetic assembly 20, the second magnetic assembly 30, and the third magnetic assembly 40 are fixed by adhesion. Specifically, the first magnet 21, the second magnet 31, and the third magnet 41 located on the same side are bonded and fixed in this order. After the first magnetic group 20, the second magnetic group 30 and the third magnetic group 40 are attached to each other, the magnetic circuit system is arranged more compactly, and the occupied space of the magnetic circuit system can be reduced to the maximum extent.

Of course, the first magnetic assembly 20, the second magnetic assembly 30 and the third magnetic assembly 40 may not be adhered to each other, and each may be connected to other components. Specifically, in an embodiment, the speaker 100 further includes a housing 10, the housing 10 forms a receiving space for receiving the vibration system and the magnetic circuit system, and the edge portion 53 of the diaphragm 50 is connected to the housing 10. The first magnetic group 20, the second magnetic group 30, and the third magnetic group 40 are respectively fixed to an inner surface of the housing 10. In this embodiment, the first magnetic group 20, the second magnetic group 30, and the third magnetic group 40 are respectively fixed on the inner side surfaces of the housing 10 extending along the vibration direction, that is, the first magnet 21, the second magnet 31, and the third magnet 41 located on the same side are respectively adhered to the same inner side surface of the housing 10.

In addition, in order to improve stability, the first magnetic group 20, the second magnetic group 30 and the third magnetic group 40 may be connected in sequence, and at the same time, the first magnetic group 20, the second magnetic group 30 and the third magnetic group 40 may also be connected to the housing 10.

The first, second, and third

magnetic groups

20, 30, and 40 may be elongated in shape, and the magnetic gap 43 formed thereby is also elongated.

The interval between the two first magnets 21, the interval between the two second magnets 31, and the interval between the two third magnets 41 are small, so that the magnetic gap 43 formed is narrow in width and substantially elongated in shape.

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, the speaker 100 includes two long sides and two short sides (the short sides extend in the width direction of the magnetic gap 43). 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 60, diaphragm 50, case 10, and magnetic circuit system correspond to the long and short sides of the speaker 100, respectively.

In one embodiment, the first magnet 21, the second magnet 31, and the third magnet 41 respectively extend along the extending direction of the diaphragm 50 and are in a long shape. The flat voice coil 60 has a long axis section 61 extending in the longitudinal direction of the first magnet 21, and a short axis section 62 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 60 in this form are adopted, the loudspeaker 100 can make full use of the magnetic circuit system and the flat voice coil 60 in this form, reasonably arrange the space and the structure, and ensure the compactness of the structure, 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.

After the structure of the flat voice coil 60 is adopted, the size of the flat voice coil 60 in the axial direction is extremely small, so that the magnetic gap 43 between the magnets can be small enough, and the size of the short side of the loudspeaker 100 can be small, a flat structure is formed, and the whole space is better adapted. The loudspeaker 100 is shown as being formed in a flat, elongated configuration.

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 60 is along the distribution direction of the two first magnets 21, and the flat voice coil 60 is flat in the axial direction thereof, and the conductive wire of the flat voice coil 60 is distributed along the radial direction thereof. Thus configured, the housing 10 of the speaker 100 can be configured to accommodate the shape of the flat voice coil 60, which is also flat, and better accommodates the overall space.

The flat voice coil 60 has two first lead segments 61 spaced apart along the vibration direction, and the two first lead segments 61 are respectively located in the first magnetic gap 44 and the second magnetic gap 45. In embodiments where the flat voice coil is elongated, the first wire segment is referred to as the long shaft segment 61.

In one embodiment, the height of the first wire segment 61 along the vibration direction, which is disposed corresponding to the first magnet 21, is smaller than or equal to the height of the first magnet 21 along the vibration direction. The first wire segment 61 is disposed corresponding to the third magnet 41, and the height along the vibration direction thereof is smaller than or equal to the height along the vibration direction of the third magnet 41. When the diaphragm 50 is in a rest state, i.e., not vibrating, the upper first wire segment 61 is located substantially in the space between the two first magnets 21 and does not extend beyond or only extends to a very small extent beyond the upper and lower sides of the first magnets 21. The lower first line portion 61 is located substantially in the space between the two third magnets 41 and does not extend beyond or only extends to a very small extent beyond the upper and lower sides of the third magnets 41. Therefore, the magnetic field force applied to the first wire section 61 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 43 refers to the arrangement direction of the two first magnets 21. The axial direction of the flat voice coil 60 is along the arrangement direction of the two first magnets 21.

The axial direction of the flat voice coil 60 may be along the longitudinal direction of the magnetic gap 43. The speaker 100 thus formed is flat in the axial direction of the flat voice coil 60.

The magnetic circuit system may further include a magnetic conductive yoke 70, and the third magnetic group 40 is disposed on the magnetic conductive yoke 70.

The casing 10 extends along the outer edge of the magnetic yoke 70 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 a magnetic conductive yoke 70, and the housing 10 and the magnetic conductive yoke 70 together enclose a structure that is open toward the diaphragm 50. It should be noted that the annular housing 10 refers to a completely closed ring shape or a non-completely closed ring shape.

Referring to fig. 3 again, the housing 10 has a first end surface 11 close to the edge portion 53, the first end surface 11 is curved, and the curvature direction of the first end surface 11 is the same as the curvature direction of the diaphragm 50, i.e. the first end surface 11 also protrudes away from the flat voice coil 60. 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, 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 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 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).

The upper surface of the first magnetic group 20 shown in fig. 2 and 3 is curved, however, in other embodiments, the upper surface of the first magnetic group 20 may be flat.

Referring to fig. 9, in an embodiment, the flat voice coil 60 has a sensing section 63 and two connecting sections 64 respectively disposed at two ends of the sensing section 63, the sensing section 63 is located in the magnetic gap 21, and the connecting sections 64 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 63, the inductive section 63 is located in the magnetic field region, and the connecting section 64 is located outside the magnetic field region. For example, the sensing section 63 is referred to as a long shaft section 61, and the connecting section 64 is referred to as a short shaft section 62. In this way, the first magnet 21, the second magnet 22, or the third magnet 23 does not protrude inside the short shaft section 62 of the flat voice coil 60.

Referring to fig. 7 to 10, in an embodiment, the speaker further includes a first bracket 81 and a second bracket 82 connecting the diaphragm 50 and the flat voice coil 60. In the invention, after the first support 81 and the second support 82 are arranged, the flat voice coil 60 can be supported by the first support 81 and the second support 82, and a plurality of support positions are provided, so that the condition that two ends of the flat voice coil 60 shake can be avoided, the polarization problem of a product is effectively solved, and the product performance is improved.

In this embodiment, the first bracket 81 and the second bracket 82 are spaced apart in a direction perpendicular to the vibration direction. For example, the first and

second brackets

81 and 82 are distributed along the extending direction of the long axis section 61.

In an embodiment, the first support 81 and the second support 82 are respectively disposed near two opposite sides of the flat voice coil 60, the two opposite sides in this embodiment refer to two opposite sides along a radial direction of the flat voice coil 60, and the first support 81 and the second support 82 are distributed in a direction perpendicular to the vibration direction. Specifically, the speaker 100 is in an elongated shape, the flat voice coil 60 is correspondingly in an elongated shape to have a long axis section 61 and a short axis section 62, the long axis section 61 corresponds to a long side of the speaker 100, the long axis section 61 extends in a direction perpendicular to the vibration direction, the short axis section 62 corresponds to a short side of the speaker 100, and the short axis section 62 extends in the vibration direction. The first bracket 81 and the second bracket 82 are distributed along the long shaft section 61, and the first bracket 81 and the second bracket 82 are respectively disposed at two ends of the long shaft section 61.

The first support 81 and the second support 82 are respectively arranged on two opposite sides of the flat voice coil 60 in the length direction, so that the flat voice coil 60 can be supported in the length direction, and the flat voice coil 60 can be better prevented from shaking.

In one embodiment, the first support 81 and the second support 82 are respectively connected to two end surfaces of the flat voice coil 60. Specifically, the end face of the flat voice coil 60 refers to a surface extending around the axial direction thereof, and the two end faces refer to two surfaces distributed along the axial direction thereof. The first holder 81 is connected to one end surface of the flat voice coil 60, the second holder 82 is connected to the other end surface of the flat voice coil 60, and the first holder 81 and the second holder 82 hold the flat voice coil 60 therebetween and perform a bidirectional limit function on the flat voice coil 60 in the axial direction of the flat voice coil 60.

The first support 81 and the second support 82 may have the same structure, and of course, the first support 81 and the second support 82 may have different structures, as long as the connection between the diaphragm 50 and the flat voice coil 60 can be realized to drive the diaphragm 50 to vibrate.

In one embodiment, the first bracket 81 and the second bracket 82 are located outside the magnetic gap 21 and connected to the corresponding connecting segments 64. Thus, the first bracket 81 and the second bracket 82 do not occupy the space of the magnetic gap 21, and the magnetic field intensity can be increased, thereby improving the performance.

Please refer to fig. 11, 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. 13 and 14 show the schematic structure of the conventional speaker 100 'mounted on the circular dial plate, as can be seen from the figure, for the circular watch, since the conventional speaker 100' is of a straight-edge structure, the surface of the side where the diaphragm 50 'of the speaker 100' is located is substantially a straight surface, when the speaker 100 'is mounted on the circular dial plate, the shape coverage is not well compatible, the space waste is large, that is, a sector space is wasted between the first end surface 11 of the casing 10 and the circular housing 200, which is not beneficial to improving the performance of the speaker 100', and since the distance of the sound outlet pipe between the speaker 100 and the sound outlet 201 is long, the sound outlet effect of the whole watch is further affected.

Fig. 11 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 face 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.

Claims

1. A loudspeaker is characterized by comprising a vibration system and a magnetic circuit system, wherein the magnetic circuit system comprises a first magnetic group, a second magnetic group and a third magnetic group which are sequentially arranged along the vibration direction of the vibration system, wherein,

2. The loudspeaker of claim 1, wherein the first magnet and the third magnet on the same side of the flat voice coil have opposite magnetic poles.

3. The loudspeaker of claim 2, wherein the magnetic pole of the second magnet adjacent to the first magnet is the same as the magnetic pole of the first magnet adjacent to the other of the first magnets, of the first magnet and the second magnet that are on the same side of the flat voice coil.

4. The loudspeaker of claim 1, wherein the first, second, and third magnetic groups are adhesively secured therebetween.

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

6. The speaker according to any one of claims 1 to 5, wherein the speaker is flat in an axial direction of the flat voice coil along a direction in which the two first magnets are arranged, and wherein the flat voice coil is flat in the axial direction thereof with the conductive wire of the flat voice coil arranged in a radial direction thereof.

7. The speaker of claim 6, 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 loudspeaker of claim 7, wherein the first magnet, the second magnet, and the third magnet each extend in an elongated shape along the extension direction of the diaphragm;

9. The loudspeaker of claim 1, wherein said first conductor segment disposed in correspondence with said first magnet has a height in said vibration direction less than or equal to a height of said first magnet in said vibration direction;

10. 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.

11. An electronic device comprising a housing and a loudspeaker according to any one of claims 1 to 10, the housing having a curved shape, the housing having a curved direction which is the same as the curved direction of the loudspeaker diaphragm.