CN113473326B - Speaker and electronic device - Google Patents

Abstract

The invention discloses a loudspeaker and electronic equipment, wherein the loudspeaker comprises a magnetic circuit system and a vibration system, the vibration system comprises a vibrating diaphragm and a flat voice coil, the axial direction of the flat voice coil is perpendicular to the vibration direction of the vibrating diaphragm, and the vibrating diaphragm is in a bending shape and protrudes towards the direction far away from the flat voice coil; the magnetic circuit system comprises a first magnet part and a second magnet part, wherein a first magnetic gap is formed between two opposite magnetic poles at the upper parts of the first magnet part and the second magnet part, a second magnetic gap is formed between two opposite magnetic poles at the lower parts of the first magnet part and the second magnet part, and the magnetic pole distribution directions of the two opposite magnetic poles at the upper parts of the first magnet part and the second magnet part are opposite to each other; the flat voice coil is provided with two first wire segments which are distributed at intervals along the vibration direction, and the two first wire segments are respectively positioned in the first magnetic gap and the second magnetic gap; the first magnet portion and the second magnet portion each have a first surface facing the diaphragm, the first surface having a curved shape with a curved direction identical to a curved direction of the diaphragm.

Description

Speaker and electronic device

Technical Field

The invention relates to the technical field of acoustic energy conversion, in particular to a loudspeaker and electronic equipment.

Background

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

Electronic devices, such as mobile phones or wearable intelligent terminals, have more stringent size requirements due to portability, comfort, aesthetics, and the like, and the size and thickness have increasingly tended to be miniaturized. Therefore, after various main components such as a chip, a battery, a main board, a motor and the like are removed, the space for the built-in speaker is small, and the performance of the speaker is difficult to improve.

For example, for an electronic device with a circular housing, since conventional speakers are all of straight-edge structure, they cannot be well shape-covered and compatible when they are fitted into a circular dial, which results in a large space waste and is disadvantageous for improving speaker performance.

Disclosure of Invention

The invention mainly aims to provide a loudspeaker, which aims to improve the acoustic performance of the loudspeaker while ensuring the smaller size of the loudspeaker.

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

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

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

the first magnet part and the second magnet part are provided with a first surface facing the vibrating diaphragm, the first surface is in a bending shape, and the bending direction of the first surface is the same as the bending direction of the vibrating diaphragm.

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

Optionally, each of the first magnet portion and the second magnet portion comprises a first magnet;

The first magnet is magnetized bidirectionally in a direction perpendicular to the vibration direction, so that the first magnet has a first magnetic pole orientation and a second magnetic pole orientation which are arranged along the vibration direction, and the first magnetic pole orientation is opposite to the second magnetic pole orientation;

the first magnetic pole orientations of the two first magnets correspond to each other, and the second magnetic pole orientations of the two first magnets correspond to each other;

the first surfaces of the two first magnets are both curved.

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

Optionally, the magnetic circuit system further includes a magnetic conductive yoke, the magnet is disposed on the magnetic conductive yoke, and the magnetic conductive yoke has the second surface.

Optionally, the surfaces of the magnet and the magnetic yoke, which are contacted with each other, are all flat surfaces.

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

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

Optionally, the speaker further includes a housing, the housing forming an accommodating space for accommodating the vibration system and the magnetic circuit system, and an edge portion of the diaphragm being connected to the housing;

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

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

Optionally, the speaker further includes: a first bracket and a second bracket 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 bracket and the second bracket are positioned outside the magnetic gap and are connected with the corresponding connecting section.

The invention also provides electronic equipment, which comprises a shell and a loudspeaker, wherein the shell is in a bending shape, and the bending direction of the shell is the same as the bending direction of the loudspeaker diaphragm.

In the invention, the bending shape of the magnet is matched with the bending shape of the vibrating diaphragm, on one hand, the distance between the first surface and the vibrating diaphragm is more uniform everywhere, and when the vibrating diaphragm vibrates up and down, the vibration of the vibrating diaphragm can be prevented from being blocked to interfere with the vibration of the vibrating diaphragm. On the other hand, the arc magnetic circuit system can fully utilize the space below the vibrating diaphragm, so that the volume of the magnetic circuit system can be set larger as much as possible, and the magnetic field intensity is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

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

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

FIG. 3 is a schematic cross-sectional view of the speaker of FIG. 1 along a short axis segment of a 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 a loudspeaker according to the invention;

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

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

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

fig. 9 is a schematic structural view of a speaker portion of fig. 3;

Fig. 10 is a front view of the speaker section structure of fig. 3;

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

FIG. 12 is a schematic view of the assembly of the first bracket, the second bracket and the flat voice coil of FIG. 9;

Fig. 13 is an assembled schematic diagram of the speaker and the whole machine in fig. 1;

fig. 14 is a schematic cross-sectional view of a conventional speaker;

fig. 15 is an assembled schematic diagram of a conventional speaker and a complete machine;

Fig. 16 is another assembly schematic diagram of a conventional speaker and a complete machine.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments 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 a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention proposes a loudspeaker which can be used in wearable electronic devices, such as watches, and which can also be used in devices such as headphones, cell phones, notebook computers, VR devices, AR devices, televisions, etc.

Referring to fig. 1 to 3 in combination, a speaker 100 includes a housing 10, a vibration system, a magnetic circuit system, and the like, and the housing 10 combines the vibration system and the magnetic circuit system.

Referring to fig. 3 and 4 in combination, the magnetic circuit includes a first magnet portion 23 and a second magnet portion 24 that are disposed at intervals to form a magnetic gap 21, a first magnetic gap 28 is formed between two opposite magnetic poles on the upper portion of the first magnet portion 23 and the second magnet portion 24, a second magnetic gap 29 is formed between two opposite magnetic poles on the lower portion, and the magnetic pole distribution directions of the two opposite magnetic poles on the upper portion and the two opposite magnetic poles on the lower portion are opposite.

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

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

The opposite poles refer to the first and second magnet portions 23 and 24 (refer to upper or lower portions) having N and S poles, respectively, at their ends that are close to each other, for example, the opposite first and second magnet portions 23 and 24 having N and S poles, respectively, at their ends that are close to each other.

The distance between the first magnet portion 23 and the second magnet portion 24 is relatively short, so that the width of the formed magnetic gap 21 is relatively narrow and the shape thereof is substantially elongated.

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

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

Referring to fig. 4 in combination, in the first embodiment, the first magnet portion 23 and the second magnet portion 24 each include a first magnet 25; the first magnet 25 is bidirectionally magnetized in a direction perpendicular to the vibration direction such that the first magnet 25 has a first magnetic pole orientation and a second magnetic pole orientation arranged along the vibration direction, the first magnetic pole orientation being opposite to the second magnetic pole orientation; the first magnetic pole orientations of the two first magnets 25 correspond to each other, and the second magnetic pole orientations of the two first magnets 25 correspond to each other.

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 N-pole of the first magnetic pole orientation are distributed in the left-to-right direction, and the S-pole and N-pole of the second magnetic pole orientation are distributed in the right-to-left direction.

In this embodiment, the first magnetic pole orientations of the two first magnets 25 correspond to each other, and the second magnetic pole orientations of the two first magnets 25 correspond to each other. The correspondence in this embodiment means that the first magnetic pole is oriented close to the same side and the second magnetic pole is oriented close to the other side, for example, the first magnetic pole is oriented close to the diaphragm 50 and the second magnetic pole is oriented close to the yoke 30. A first magnetic gap 28 is formed between the first magnetic pole orientations of the two first magnets 25, and a second magnetic gap 29 is formed between the second magnetic pole orientations of the two first magnets 25.

The following is a specific description of one embodiment:

The first magnetic pole orientations are distributed at one end of the first magnet 25 near the diaphragm 50, and the S-pole and the N-pole of the first magnetic pole orientations are distributed from left to right, so that, in the first magnetic pole orientations on the two first magnets 25, the adjacent sides thereof are the N-pole and the S-pole, and the N-pole is on the left, and the S-pole is on the right, that is, the magnetic pole opposite to the two first magnetic pole orientations.

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

The flat voice coil 40 has two first wire segments 41 spaced apart in the vibration direction, one of the first wire segments 41 being located in the first magnetic gap 28 and the other first wire segment 41 being located in the second magnetic gap 29. The direction of the magnetic field force applied to the flat voice coil 40 (one of the first wire segments 41) at the first magnetic pole orientation is the same as the direction of the magnetic field force applied to the flat voice coil 40 (the other one of the first wire segments 41) at the second magnetic pole orientation, and the two magnetic field forces are overlapped with each other, so that the magnetic field force applied to the flat voice coil 40 is larger, and 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 differs from the first embodiment in the structure of the magnetic circuit system.

In the second embodiment, the magnetic circuit system includes two second magnets 26 and two third magnets 27, specifically, two opposite sides of the flat voice coil 40 are respectively provided with one second magnet 26 and one third magnet 27, and the magnetic poles of the two second magnets 26 are opposite, and the magnetic poles of the two third magnets 27 are opposite.

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

By providing one second magnet 26 and one third magnet 27 on the same side of the flat voice coil 40, the arrangement positions of the respective magnets can be adjusted according to the dimension of the flat voice coil 40 in the vibration direction, and the effect of better fitting the shape of the flat voice coil 40 can be achieved. The second magnet 26 and the third magnet 27 can be respectively adjusted to the positions corresponding to the wire sections of the flat voice coil 40, and the second magnet 26 and the third magnet 27 can be spaced in the hollow area of the flat voice coil 40, so that the magnet volume can be reduced, and the magnet consumption can be reduced.

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

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

After the arrangement, the direction of the magnetic force applied to the first wire segment 41 above the flat voice coil 40 between the two second magnets 26 is the same as the direction of the magnetic force applied to the first wire segment 41 below the flat voice coil 40 between the two third magnets 27, and the superposition effect is achieved, so that the vibrating diaphragm 50 is driven to vibrate better.

Referring to fig. 6 and 7 in combination, the vibration system includes a diaphragm 50 and a flat voice coil 40 driving the diaphragm 50 to vibrate, the flat voice coil 40 is located in the magnetic gap 21, and the flat voice coil 40 drives the diaphragm 50 to vibrate up and down under the action of the magnetic circuit system.

The flat voice coil 40 is used for driving the vibrating 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 by other means, such as a bracket.

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

The flat structure of the flat voice coil 40 means that the flat voice coil 40 is flat in its axial direction. Specifically, the width between the inner peripheral surface and the outer peripheral surface 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 conductive wires, and the number of layers of the conductive wires in the axial direction of the flat voice coil is smaller than the number of layers of the conductive wires 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 thereof, that is, wound in the radial direction. The flat voice coil 40 has a smaller height along the axial direction thereof, for example, the number of layers formed by winding the conductive wires of the flat voice coil 40 along the axial direction thereof may be one or a smaller number of layers, so that the thickness of the flat voice coil 40 along the axial direction thereof is smaller; in the radial direction of the flat voice coil 40, the number of turns formed by winding the conductive wires is large, so that the widths formed by the conductive wires are large, and the flat voice coil 40 forms a flat structure with small axial thickness and large radial width.

For example, the flat voice coil 40 has an axial direction along the width direction of the magnetic gap 21, so that the distance between the first magnet portion 23 and the second magnet portion 24 forming the magnetic gap 21 can be made small, and the entire structure of the speaker 100 can be flat in the width direction of the magnetic gap 21.

Adopt flat voice coil 40 to the axial of flat voice coil 40 is along the width direction of magnetic gap 21, can reduce the width of magnetic gap 21, and the space that magnetic gap 21 occupy diminishes, thereby has saved the inner space of speaker 100 correspondingly, makes speaker 100 inside have bigger space holding magnetic circuit, so can improve its acoustic properties through increasing magnetic circuit size, i.e. under the prerequisite that does not increase speaker 100 overall dimension, magnetic circuit's volume can be bigger, and is better to the effect of flat voice coil 40, makes vibrating diaphragm 50's vibration amplitude bigger. Particularly in the case where the width dimension of the speaker 100 is limited, the increase in the size of the magnetic circuit system can maintain good acoustic performance of the speaker 100.

The width direction of the magnetic gap in this embodiment refers to the distribution direction of the first magnet portion 23 and the second magnet portion 24.

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

The speaker 100 may have a square structure, a circular structure, an oval structure, or the like. The following description will take an example of the elongated structure. As shown in fig. 1, the speaker 100 includes two long sides and two short sides (the short sides extend in the width direction of the magnetic gap 21). The length of the long side is longer than that of the short side. The long and short sides of the flat voice coil 40, the diaphragm 50, the case 10, and the magnetic circuit correspond to the long and short sides of the speaker 100, respectively.

Referring to fig. 6 in combination, in an embodiment, the flat voice coil 40 is elongated to have a long axis section 41 and a short axis section 42, the long axis section 41 corresponds to a long side of the speaker 100, an extending direction of the long axis section 41 is perpendicular to the vibration direction, the short axis section 42 corresponds to a short side of the speaker 100, and the short axis section 42 extends along the vibration direction, so that space utilization can be greatly improved.

In addition, the first magnet portion 23 and the second magnet portion 24 in the magnetic circuit system are also in a strip shape, the length direction of the first magnet portion 23 and the second magnet portion 24 is the same as the long axis section 41 of the flat voice coil 40, after the magnetic circuit system and the flat voice coil 40 are adopted, the magnetic circuit system and the flat voice coil 40 in the form can be fully utilized by the loudspeaker 100, space and structure are reasonably arranged, and on the basis of ensuring structural compactness, the first magnet portion 23 and the second magnet portion 24 can be in a flat shape in the distribution direction, and the first magnet portion 23 and the second magnet portion 24 are in a strip shape in the length direction, so that the whole space is matched.

For the embodiment in which the flat voice coil 40 is elongated, the first wire segment 41 is referred to as the long axis segment 41.

Referring to fig. 2 and 7 in combination, the vibration system further includes a diaphragm 50, where 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, and the ring-folded portion 52 and the edge portion 53 are both annular.

Referring to fig. 14 in combination, in the conventional loudspeaker 100 ', the diaphragm 50 ' is generally a planar diaphragm 50 ', and the acoustic performance of the loudspeaker 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. Therefore, to improve acoustic performance, it is common practice to increase the area of the diaphragm 50 'by increasing the circumferential dimension of the speaker 100'. This approach results in a larger overall speaker 100' and a larger overall footprint, which is not conducive to miniaturization and improvement of the overall unit.

In view of this, referring to fig. 7, in an embodiment of the present invention, the diaphragm 50 has a curved shape and protrudes away from the flat voice coil 40. In this embodiment, the diaphragm 50 has a curved shape, which means that the diaphragm 50 is curved integrally, not the folded-ring portion 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 center portion 51 becomes large, thereby ensuring the power of the speaker 100 and ensuring the acoustic performance. On the other hand, the mode of bending the diaphragm 50 does not need to change the circumferential dimension of the loudspeaker 100, and the external dimension of the loudspeaker 100 is not excessively large, i.e. the structures of other parts of the loudspeaker 100, such as the shell 10, the magnetic circuit system and the like, are not required to be changed, so that the normal processing of the other parts is not affected.

The shape of the diaphragm 50 may be substantially matched with the shape of the complete machine housing 200, for example, the complete machine housing 200 may be curved, so that the curved diaphragm 50 may be more matched with the shape of the complete machine housing 200, thereby effectively utilizing the complete machine space. In this way, in the case where the installation space of the speaker 100 is fixed, the effective vibration area of the center portion 51 is increased, thereby ensuring the power of the speaker 100 and the acoustic performance.

To better adapt to the curved shape of the complete machine housing 200, in one embodiment, the diaphragm 50 is curved along the length of the magnetic gap 21. In the present embodiment, the arrangement direction of the first magnet portion 23 and the second magnet portion 24 is the width direction of the magnetic gap 21, and the vibration direction of the diaphragm is the depth direction of the magnetic gap 21. While the diaphragm 50 is not bent in the width direction of the magnetic gap 21. For example, the whole machine housing 200 is in a circular ring shape, and the diaphragm 50 is in a curved shape along the length direction of the magnetic gap 21, so that the diaphragm can be better matched with the circular ring-shaped whole machine housing 200.

Referring to fig. 2 in combination, the diaphragm 50 is curved in shape as viewed from the axial direction of the flat voice coil 40, i.e., from one end of the flat voice coil 40 to the other end. Referring to fig. 3 in combination, the cross section of the flat voice coil 40 is substantially flat (without considering the protrusions formed by the reinforcing layer and the concave-convex structure formed by the collar portion 52) as viewed from the extending direction of the long axis section 41 of the flat voice coil 40. That is, the diaphragm 50 of the curved shape has an aspherical structure, but has a cylindrical arc structure.

In an embodiment, the central portion 51, the ring-folding portion 52 and the edge portion 53 are all curved, and the curvature directions of the central portion 51, the ring-folding portion 52 and the edge portion 53 are the same. Thus, the whole diaphragm 50 is in a curved shape, the curved structure of the central part 51 can increase the effective vibration area, the curved structure of the folded ring part 52 can enhance the structural strength, and the central part 51 and the edge part 53 are better connected; the curved shape of the edge portion 53 is advantageous in increasing the contact area between the edge portion 53 and the housing 10 and improving the mounting stability. Alternatively, the bending curvatures of the center portion 51, the folded ring portion 52, and the edge portion 53 may be the same, which may facilitate the overall processing.

Since the diaphragm 50 is protruded in a direction away from the flat voice coil 40 after being bent, a space between the diaphragm 50 and the magnetic circuit system is relatively large, so that the ring folding direction of the ring folding portion 52 can be protruded toward the flat voice coil 40, and the ring folding portion 52 is prevented from being protruded out of the housing 10 to cause the overall height of the loudspeaker 100 to be excessively large.

The shape of the diaphragm 50 may be generally rectangular, with the length direction of the diaphragm 50 along the long axis of the flat voice coil 40 and the width direction of the diaphragm 50 along the axial direction of the flat voice coil 40.

The diaphragm 50 is made of 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 divided vibration of the diaphragm 50 and reduce the noise of the speaker 100.

In the above, after the flat voice coil 40 is adopted, the magnetic gap 21 between the first magnet portion 23 and the second magnet portion 24 may be reduced, so that the speaker 100 may have a larger space for accommodating the magnetic circuit system, that is, the volume of the magnetic circuit system may be larger, the effect on the voice coil may be better, and the vibration amplitude of the diaphragm 50 may be larger without increasing the external dimension of the speaker 100. In the case where the diaphragm 50 having a curved shape and the diaphragm 50 having a planar shape have the same area, the size of the entire speaker 100 can be reduced to be smaller by adopting the diaphragm 50 having a curved shape in the embodiment of the present invention, so that the size of the entire speaker can be smaller. Meanwhile, the flat voice coil 40 occupies smaller space, the space saved by the flat voice coil 40 can be used for designing a magnetic circuit system with larger size, and the magnetic circuit system with larger size can in turn ensure that the flat voice coil 40 receives larger magnetic field force, so that the vibrating diaphragm 50 has better vibrating effect. Thus, the flat voice coil 40 and the bending diaphragm 50 cooperate with each other to achieve the effect that the speaker 100 has a small size and good acoustic performance.

The housing 10 forms a receiving space for receiving the vibration system and the magnetic circuit system, and the edge 53 of the diaphragm 50 is connected to the housing 10. The casing 10 extends along the outer edge of the magnetic yoke 30 to form a ring shape, and is connected with a magnetic circuit system and a vibration system respectively. For example, the edge portion 53 of the diaphragm 50 is typically connected to the housing 10, i.e., the housing 10 is disposed around the edge portion 53 of the diaphragm 50. In addition, the housing 10 is further connected to the magnetic yoke 30, or connected to the first magnet portion 23 and the second magnet portion 24, and the housing 10, the magnetic yoke 30, and the first magnet portion 23 and the second magnet portion 24 are enclosed together to form a structure with an opening facing the diaphragm 50. The annular housing 10 refers to a completely closed annular shape or a non-completely closed annular shape.

The housing 10 has a first end face 11 near the edge 53, the first end face 11 is curved, and the curvature direction of the first end face 11 is the same as the curvature direction of the diaphragm 50, that is, the first end face 11 also protrudes away from the flat voice coil 40. Alternatively, the first end surface 11 has the same curvature as the bending curvature of the diaphragm 50. The structure formed in this way has a higher degree of fit with the whole machine housing 200, and a higher space utilization ratio.

In an embodiment, along the bending direction of the diaphragm, the center portion 51 and the annular portion 52 of the diaphragm 50 at corresponding positions 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 the vibration direction. In this embodiment, the central portion 51 and the folded ring portion 52 are lower than the first end face 11, which means that the central portion 51 and the folded ring portion 52 are accommodated in the accommodating space formed by the housing 10 and do not protrude from the first end face 11 of the housing 10. When the loudspeaker 100 is mounted on the whole machine shell 200, the loudspeaker 100 is abutted against the whole machine shell 200 through the shell 10 or a sealing ring on the shell 10, and the center part 51 and the folded ring part 52 of the vibrating diaphragm 50 are separated from the whole machine shell 200 through the vibrating gap, and the vibrating gap provides a larger vibrating space for the vibration of the center part 51, so that the vibrating diaphragm 50 is prevented from being interfered by the whole machine shell 200.

In one embodiment, the edge 53 is connected to the inner wall of the housing 10, and the surface of the edge 53 facing away from the voice coil is flush with the first end face 11 or is lower than the first end face 11. That is, similarly, the edge portion 53 does not protrude from the first end surface 11, and the position where the edge portion 53 is connected is on the inner wall surface of the housing 10, so that the entire height (referred to as the thickness direction of the diaphragm 50) of the speaker 100 can be prevented from becoming large.

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

Referring to fig. 3 in combination, in an embodiment, the first magnet portion and the second magnet portion each have a first surface 22 facing the diaphragm 50, the first surface 22 has a curved shape, and a bending direction of the first surface 22 is the same as a bending direction of the diaphragm 50. Alternatively, the first surface 22 has a curvature that is the same as the curvature of the diaphragm 50. In this way, the curved shape of the magnetic circuit system is matched with the curved shape of the diaphragm 50, on one hand, the distance between the first surface 22 and the diaphragm 50 is more uniform everywhere, and when the diaphragm 50 vibrates up and down, interference to vibration of the diaphragm 50 caused by obstruction to vibration of the diaphragm 50 can be avoided. On the other hand, the arc-shaped magnetic circuit system can fully utilize the space below the diaphragm 50, so that the volumes of the first magnet part and the second magnet part can be set larger as much as possible, and the magnetic field strength is improved.

In addition, the first surface 22 has a curved shape in the length direction of the magnetic gap, while the first surface 22 is not curved in the width direction of the magnetic gap.

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

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

Referring to fig. 2 in combination, in an embodiment, the magnetic circuit has a second surface 31 facing away from the diaphragm 50, and the second surface 31 is a flat surface. Specifically, the magnetic circuit system further includes a magnetic yoke 30, the first magnet portion and the second magnet portion are disposed on the magnetic yoke 30, and the magnetic yoke 30 has the second surface 31. Thus, the second surface 31 is similar to the outer surface of the speaker, and the outer side of the second surface is designed in a plane, so that the speaker can keep a regular shape, and can be tightly combined with a battery, a main board and the like during the whole assembly, thereby improving the space utilization, increasing the battery size and prolonging the endurance time. By flat surface is meant herein that the surface is in the same plane.

In addition, the surfaces of the first magnet portion 23 and the second magnet portion 24 which are in contact with the magnetic yoke 30 are both flat surfaces. Specifically, the side of the first magnet portion or the second magnet portion facing away from the first surface 22 thereof is a flat surface, the surface of the magnetic yoke 30 facing the diaphragm 50 is a flat surface, and the surfaces of the first magnet portion 23 and the second magnet portion 24, which are in contact with the magnetic yoke 30, are more regular, so that the two can be closely combined at the time of assembly.

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

Referring to fig. 10 in combination, in one embodiment, the first magnet portion 23 and the second magnet portion 24 are projected on the end face of the flat voice coil 40, and two ends thereof in the length direction are located on the inner periphery of the flat voice coil 40. Wherein the width direction of the first magnet portion 23 and the second magnet portion 24 refers to the width direction of the magnetic gap 21, and the height direction of the first magnet portion 23 and the second magnet portion 24 refers to the direction in which the flat voice coil 40 is directed toward the diaphragm 50. In this embodiment, the first magnet portion 23 and the second magnet portion 24 have a length direction which is along the extending direction of the diaphragm 50 and extends along the end face of the flat voice coil 40, and the ends of the first magnet portion 23 and the second magnet portion 24 in the length direction thereof are flush with the inner peripheral face of the flat voice coil 40, or the ends of the first magnet portion 23 and the second magnet portion 24 in the length direction thereof correspond to the inside of the flat voice coil 40 with a gap from the inner peripheral face of the flat voice coil 40. That is, the length of either one of the first magnet portion 23 and the second magnet portion 24 is less than or equal to the length of the inner peripheral surface of the flat voice coil 40. As such, the first magnet portion 23 and the second magnet portion 24 do not extend beyond the inside of the short axis section 42 of the flat voice coil 40. Since the directions of the magnetic field forces received by the two stub sections 42 (extending in the up-down direction) of the flat voice coil 40 are opposite, the vibrations of the diaphragm 50 are hardly contributed at the stub sections 42, and the first magnet portion 23 and the second magnet portion 24 can be disposed not to exceed the stub sections 42. Meanwhile, the short shaft section 42 of the flat voice coil 40 can be connected to the diaphragm 50 by a bracket or other structure, where the first magnet portion 23 and the second magnet portion 24 are not provided at the short shaft section 42, which is large in space, and can provide sufficient space for mounting the bracket, thereby not requiring an additional increase in speaker volume.

In one embodiment, the flat voice coil 40 has a sensing section 43 and two connection sections 44 disposed at two ends of the sensing section 43, the sensing section 43 is located in the magnetic gap 21, and the connection sections 44 extend out of the magnetic gap 21 along the length direction of the magnetic gap 21. In this embodiment, the length of the first magnet portion 23 or the second magnet portion 24 is substantially equal to the length of the sensing section 43, the sensing section 43 is located in the magnetic field region, and the connecting section 44 is located outside the magnetic field region. For example, sensing section 43 refers to long axis section 41 and connecting section 44 refers to short axis section 42. As such, the first magnet portion 23 or the second magnet portion 24 does not extend beyond the inside of the short axis section 42 of the flat voice coil 40.

Referring to fig. 9 to 12 in combination, in one embodiment, the speaker further includes a first bracket 61 and a second bracket 62 for connecting the diaphragm 50 and the flat voice coil 40. In the invention, after the first bracket 61 and the second bracket 62 are arranged, the flat voice coil 40 can be supported by the first bracket 61 and the second bracket 62, and a plurality of supporting positions are provided, so that the shaking condition of two ends of the flat voice coil 40 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, 62 are distributed along the extending direction of the long-axis segment 41.

In an embodiment, the first support 61 and the second support 62 are disposed near two opposite sides of the flat voice coil 40, respectively, which are opposite sides in the radial direction of the flat voice coil 40, and the distribution direction of the first support 61 and the second support 62 is perpendicular to the vibration direction. Specifically, the speaker 100 is elongated, the flat voice coil 40 is correspondingly elongated to have a long axis section 41 and a short axis section 42, the long axis section 41 corresponds to a long side of the speaker 100, the extending direction of the long axis section 41 is perpendicular to the vibration direction, the short axis section 42 corresponds to a short side of the speaker 100, and the short axis section 42 extends along the vibration direction. The first brackets 61 and the second brackets 62 are distributed along the long shaft section 41, and the first brackets 61 and the second brackets 62 are provided at both ends of the long shaft section 41.

The first bracket 61 and the second bracket 62 are respectively arranged at 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 can be prevented from shaking better.

In one embodiment, the first bracket 61 and the second bracket 62 are respectively connected to two end surfaces of the flat voice coil 40. Specifically, the end surfaces of the flat voice coil 40 refer to surfaces extending around the axial direction thereof, and the two end surfaces refer to two surfaces distributed along the axial direction thereof. The first bracket 61 is connected to one end face of the flat voice coil 40, the second bracket 62 is connected to the other end face of the flat voice coil 40, the flat voice coil 40 is sandwiched between the first bracket 61 and the second bracket 62, and a bidirectional limiting function is provided to the flat voice coil 40 in the axial direction of the flat voice coil 40.

The structures of the first bracket 61 and the second bracket 62 may be the same, and of course, the structures of the first bracket 61 and the second bracket 62 may be different, so long as the connection between the diaphragm 50 and the flat voice coil 40 can be achieved, and the diaphragm 50 is driven 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 connection section 44. Thus, the first bracket 61 and the second bracket 62 do not occupy the space of the magnetic gap 21, so that the magnetic field strength can be increased, and the performance can be improved.

Referring to fig. 13 in combination, 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 shown in the above embodiment, which is not described herein again. 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, or the like.

Wherein, 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 bending curvature of the housing 200 is the same as that of the diaphragm 50. Thus, the bending radian of the diaphragm 50 can be perfectly matched with the bending radian of the housing 200, and an arc-shaped vibration space is formed between the two, so that the diaphragm 50 can vibrate conveniently, and the space utilization rate can be greatly improved.

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

The following description will take an electronic device as a wristwatch as an example:

Fig. 15 and 16 show schematic structural views of a conventional speaker 100 'mounted on a circular dial, and it is apparent from the drawings that, for a circular watch, since the conventional speaker 100' has a straight structure, the surface of the side of the diaphragm 50 'of the speaker 100' is a substantially straight surface, and when the speaker 100 'is mounted on the circular dial, it is not well compatible in shape coverage, and the waste of space is large, i.e., there is a waste of a sector-shaped space between the first end surface 11 of the housing 10 and the circular case 200, which is disadvantageous for improving the performance of the speaker 100', and further affects the sound output effect of the whole machine due to the long distance of the sound output duct between the speaker 100 and the sound output hole 201.

Fig. 13 shows a schematic structural diagram of the speaker 100 mounted on a circular dial according to an embodiment of the present invention, and it is obvious from the figure that the curvature of the first end face 11 of the speaker 100 housing 10 may be matched with the circular housing 200 of the circular dial, that is, the speaker 100 housing 10 may extend along the circular housing 200, and the two may be in sealing abutment. Thus, after the shell 10 with the curved shape is adopted, the shell 10 can reasonably utilize the wasted fan-shaped space in the traditional structure, and the space is used as the vibration space of the vibrating diaphragm 50, so that the vibration space of the vibrating diaphragm 50 is increased and the volume of the front acoustic cavity of the loudspeaker 100 is increased without increasing the installation space of the loudspeaker 100, thereby being beneficial to improving the acoustic performance. In addition, since the speaker 100 can utilize the fan-shaped space as a part of the front sound cavity, the part of space is directly facing the diaphragm 50, and the sound outlet 201 on the housing 200 can be directly facing the diaphragm 50, so that the sound can be directly radiated, without turning through the pipe section, thus shortening the distance between the speaker 100 and the sound outlet 201 of the dial, reducing airflow sound, and improving the audio effect of the whole machine.

The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).

Claims (10)

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

The vibration system comprises a vibrating diaphragm and a flat voice coil for driving the vibrating diaphragm to vibrate, the axial direction of the flat voice coil is perpendicular to the vibration direction of the vibrating diaphragm, the vibrating diaphragm is in a bent shape and protrudes towards the direction away from the flat voice coil, and the vibrating diaphragm is in a bent shape along the length direction of the magnetic gap;

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

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

The first magnet part and the second magnet part are provided with a first surface facing the vibrating diaphragm, the first surface is in a bending shape, and the bending direction of the first surface is the same as the bending direction of the vibrating diaphragm;

the magnetic circuit system is provided with a second surface which is away from the vibrating diaphragm, and the second surface is a straight surface.

2. The loudspeaker of claim 1, wherein the curved curvature of the first surface is the same as the curved curvature of the diaphragm.

3. The loudspeaker of claim 1, wherein the first magnet portion and the second magnet portion each comprise a first magnet;

The first magnet is magnetized bidirectionally in a direction perpendicular to the vibration direction, so that the first magnet has a first magnetic pole orientation and a second magnetic pole orientation which are arranged along the vibration direction, and the first magnetic pole orientation is opposite to the second magnetic pole orientation;

the first magnetic pole orientations of the two first magnets correspond to each other, and the second magnetic pole orientations of the two first magnets correspond to each other;

the first surfaces of the two first magnets are both curved.

4. The loudspeaker of claim 1, wherein the magnetic circuit system further comprises a magnetic yoke, the magnet being disposed on the magnetic yoke, the magnetic yoke having the second surface.

5. The loudspeaker of claim 4, wherein the surfaces of the magnet and the magnetically permeable yoke that contact each other are flat surfaces.

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

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

The flat voice coil has a long-axis section extending in a longitudinal direction of the magnetic gap and a short-axis section extending in a height direction of the magnetic gap.

8. The speaker according to any one of claims 1 to 7, further comprising a housing forming an accommodation space for accommodating the vibration system and the magnetic circuit system, an edge portion of the diaphragm being connected to the housing;

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

9. The loudspeaker of claim 1, wherein the loudspeaker further comprises: a first bracket and a second bracket 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 bracket and the second bracket are positioned outside the magnetic gap and are connected with the corresponding connecting section.

10. An electronic device comprising a housing and a loudspeaker according to any one of claims 1-9, wherein the housing has a curved shape, and wherein the direction of curvature of the housing is the same as the direction of curvature of the loudspeaker diaphragm.