Speaker and Electronic Device

Abstract

The present invention discloses a loudspeaker and an electronic device. The loudspeaker includes a housing, a magnetic circuit system, and a vibration system. The magnetic circuit system includes a first magnet part and a second magnet part that are spaced apart to form a magnetic gap. A first magnetic gap is formed between two opposite-sex magnetic poles at the upper part of the first magnet part and the second magnet part, and a second magnetic gap is formed between two opposite-sex magnetic poles at the lower part. Moreover, the magnetic pole distribution directions of the two opposite-sex magnetic poles at the upper part and the two opposite-sex magnetic poles at the lower part are opposite; the vibration system includes a diaphragm and a flat voice coil that drives the diaphragm to vibrate; the diaphragm includes a central part, a surround part disposed around the outer periphery of the central part, and an edge part disposed around the outer periphery of the surround part; the central part is in a curved shape and protrudes in a direction away from the flat voice coil; the surround part is connected to the edge of the central part and extends by bending in the vibration direction of the diaphragm; the edge part is connected to the housing. The present invention can enable the loudspeaker to have a smaller size and better acoustic performance.

Description

Technical Field

[0001] The invention relates to the technical field of sound energy conversion, and in particular to a loudspeaker and an electronic device. Background Art

[0002] For dynamic speakers, their acoustic performance is directly related to their size. The larger the size, the better the acoustic effect, and the smaller the size, the worse the acoustic effect.

[0003] Considering portability, comfort and aesthetics, electronic devices such as mobile phones or wearable smart terminals have strict requirements on size, and their size and thickness are becoming increasingly miniaturized. Therefore, after removing various major components such as chips, batteries, motherboards, motors, etc., there is little space left for built-in speakers, and it is difficult to improve the performance of the speakers.

[0004] Moreover, the effective vibration and sound-generating area of ​​the diaphragm is actually the rigid part in the center, and the flexible folded ring part at the edge occupies a large amount of space. As the product size continues to shrink, especially when the width of the product decreases, the effective vibration and sound-generating area of ​​the diaphragm is greatly reduced, which will cause the frequency response of the dynamic electroacoustic transducer to decrease. Summary of the invention

[0005] In order to solve the above technical problems, the main purpose of the present invention is to provide a speaker and an electronic device, aiming to ensure that the speaker has a small size while improving its acoustic performance.

[0006] In order to achieve the above-mentioned object, the present invention provides a loudspeaker, comprising a housing, a magnetic circuit system and a vibration system, wherein the housing forms a receiving space for receiving and fixing the magnetic circuit system and the vibration system;

[0007] The magnetic circuit system comprises a first magnetic part and a second magnetic part which are arranged at intervals to form a magnetic gap, a first magnetic gap is formed between two opposite magnetic poles at the upper part of the first magnetic part and the second magnetic part, and a second magnetic gap is formed between two opposite magnetic poles at the lower 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;

[0008] The vibration system includes a diaphragm and a flat voice coil driving the diaphragm to vibrate, the flat voice coil is located in the magnetic gap, the axial direction of the flat voice coil is perpendicular to the vibration direction of the diaphragm, the flat voice coil has two first wire segments spaced apart along the vibration direction, and the two first wire segments are respectively located in the first magnetic gap and the second magnetic gap;

[0009] The diaphragm includes a central portion, a surround portion disposed around the outer periphery of the central portion, and an edge portion disposed around the outer periphery of the surround portion; the central portion has a curved shape and protrudes in a direction away from the flat voice coil; the surround portion is connected to the edge of the central portion and extends by bending in the vibration direction of the diaphragm; the edge portion is connected to the housing.

[0010] Optionally, the surround portion is disposed offset from the extending direction of the outer periphery of the central portion, so that an included angle is formed between the surround portion and the outer periphery of the central portion.

[0011] Optionally, the included angle is θ, where 90° ≤ θ ≤ 115°.

[0012] Optionally, the surround portion has a curved section that extends back and forth in a direction close to and away from the central portion.

[0013] Optionally, the surround portion extends toward a side of the central portion facing away from the flat voice coil.

[0014] Optionally, the edge portion extends in the vibration direction and away from the central portion.

[0015] Optionally, the housing includes a main body and a cover plate covering a port of the main body, and the cover plate has a curved shape;

[0016] The edge portion is disposed close to the cover plate and is connected to the inner side wall of the main body, and the curved shape of the central portion is adapted to the curved shape of the cover plate.

[0017] Optionally, the main body has a first end face close to the edge portion, the first end face has a curved shape, and the curved shape of the first end face is adapted to the curved shape of the central portion.

[0018] Optionally, the edge portion extends in the vibration direction of the diaphragm, the edge portion has an inner side facing the central portion and an outer side facing away from the central portion, and a connecting groove is formed on the outer side of the edge portion;

[0019] A connecting rib that cooperates with the connecting groove is protruded on the inner side wall of the housing.

[0020] Optionally, the central portion has a curved shape along the length direction of the magnetic gap.

[0021] Optionally, the number of layers of conductive wire materials in the axial direction of the flat voice coil is less than the number of turns of the conductive wire materials in the radial direction of the flat voice coil.

[0022] The present invention also provides an electronic device, including a housing and a speaker, wherein the housing is in a curved shape, and the bending direction of the housing is the same as that of the central portion of the diaphragm of the speaker.

[0023] In the technical solution provided by the present invention, by adopting a flat voice coil, the magnetic gap between the first magnet portion and the second magnet portion can be reduced, so that there is a larger space inside the speaker to accommodate the first magnet portion and the second magnet portion. Without increasing the external dimensions of the speaker, the volumes of the first magnet portion and the second magnet portion can be made larger, so as to have a better effect on the voice coil, and the vibration amplitude of the diaphragm can be made larger. And in the present invention, the surround portion of the diaphragm is arranged to bend and extend along the vibration direction of the diaphragm. Compared with the traditional diaphragm, the surround portion of the diaphragm in the present invention does not occupy the effective vibration space. In a diaphragm of the same size, the area of the central portion of the diaphragm in the present invention can be set larger, thereby increasing the effective vibration space of the diaphragm. Therefore, the frequency response of the speaker can be increased. Moreover, when the diaphragm with a curved shape and the diaphragm with a planar shape have the same area, after adopting the diaphragm with a curved shape in the embodiment of the present invention, the size of the entire speaker can be reduced to a smaller size, so that the size of the whole machine can be smaller. At the same time, the flat voice coil occupies less space, and the space saved by the flat voice coil can be used for the first magnet portion and the second magnet portion to be designed with larger sizes. The larger-sized first magnet portion and second magnet portion, in turn, can ensure that the flat voice coil receives a larger magnetic force, guaranteeing a better vibration effect of the diaphragm. Therefore, the flat voice coil, the curved diaphragm and the vertically arranged surround cooperate with each other to jointly achieve the effect of the speaker having a smaller size and better acoustic performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0025] Figure 1 It is a schematic structural diagram of an embodiment of a speaker provided by the present invention;

[0026] Figure 2 It is Figure 1 an enlarged structural diagram of detail A in

[0027] Figure 3 It is Figure 1 a cross-sectional structural diagram of the speaker in

[0028] Figure 4Schematic cross-sectional structure diagram of another embodiment of the loudspeaker;

[0029] Figure 5 is Figure 1 Schematic structure diagram of the diaphragm described in

[0030] Figure 6 is Figure 4 Schematic cross-sectional structure diagram of the diaphragm described in

[0031] Explanation of the reference numerals in the drawings:

[0032] Reference numeral Name Reference numeral Name 100 Loudspeaker 24 First magnetic gap 10 Housing 25 Second magnetic gap 101 Main body 30 Magnetic yoke 102 Cover body 40 Flat voice coil 11 First end face 41 First wire segment 12 Connecting rib 50 Diaphragm 21 First magnet part 51 Central part 22 Second magnet part 52 Folded edge part 23 Magnetic gap 53 Edge part

[0033] For the realization of the object of the present invention, its functional features and excellent effects, further explanations will be given below in conjunction with specific embodiments and the drawings. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0035] It should be noted that if there are directional indications involved in the embodiments of the present invention, such directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If this specific posture changes, the directional indications will also change accordingly.

[0036] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present invention, such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] The present invention provides a loudspeaker and an electronic device, Figures 1 to 6 is an embodiment of the loudspeaker provided by the present invention.

[0038] The present invention provides a loudspeaker, which can be used in wearable electronic devices, such as watches. In addition, the loudspeaker can also be used in devices such as headphones, mobile phones, laptop computers, VR devices, AR devices, and televisions.

[0039] Please refer to Figures 1 to 3 In this embodiment, the loudspeaker 100 includes a housing 10, a magnetic circuit system, and a vibration system. The housing 10 forms a receiving space for receiving and fixing the magnetic circuit system and the vibration system. The magnetic circuit system includes a first magnet part 21 and a second magnet part 22 that are spaced apart to form a magnetic gap. A first magnetic gap 24 is formed between two opposite magnetic poles at the upper part of the first magnet part 21 and the second magnet part 22, and a second magnetic gap 25 is formed between two opposite magnetic poles at the lower part. Moreover, the magnetic pole distribution directions of the two opposite magnetic poles at the upper part and the two opposite magnetic poles at the lower part are opposite. The vibration system includes a diaphragm 50 and a flat voice coil 40 that drives the diaphragm 50 to vibrate. The flat voice coil 40 is located in the magnetic gap 23. The axis of the flat voice coil 40 is perpendicular to the vibration direction of the diaphragm 50. The flat voice coil 40 has two first wire segments 41 that are spaced apart along the vibration direction, and the two first wire segments 41 are respectively located in the first magnetic gap 24 and the second magnetic gap 25. The diaphragm 50 includes a central portion 51, a surround portion 52 that is disposed around the outer peripheral side of the central portion 51, and an edge portion 53 that is disposed around the outer peripheral side of the surround portion 52. The central portion 51 is in a curved shape and protrudes away from the flat voice coil 40. The surround portion 52 is connected to the edge of the central portion 51 and extends by bending in the vibration direction of the diaphragm 50. The edge portion 53 is connected to the housing 10.

[0040] It should be noted that the loudspeaker 100 can be a square structure, a circular structure, an oval structure, etc. Here, a rectangular structure will be taken as an example for illustration. As Figure 1 shown, the loudspeaker 100 includes two long sides and two short sides (the short sides extend in the width direction of the magnetic gap 23). The length of the long side is greater than the length of the short side. The long sides and short sides of the flat voice coil 40, the diaphragm 50, the housing 10, and the magnetic circuit system respectively correspond to the long sides and short sides of the loudspeaker 100.

[0041] In the technical solution provided by the present invention, by adopting the flat voice coil 40, the magnetic gap 23 between the first magnet part 21 and the second magnet part 22 can be reduced, so that there is a larger space inside the speaker 100 to accommodate the first magnet part 21 and the second magnet part 22. Without increasing the external dimensions of the speaker 100, the volumes of the first magnet part 21 and the second magnet part 22 can be made larger, so as to have a better effect on the voice coil, and the vibration amplitude of the diaphragm 50 can be made larger. And in the present invention, the surround part 52 of the diaphragm 50 is arranged to bend and extend along the vibration direction of the diaphragm 50. Compared with the traditional diaphragm 50, the surround part 52 of the diaphragm 50 in the present invention does not occupy the effective vibration space. Among diaphragms 50 of the same size, the area of the central part 51 of the diaphragm 50 in the present invention can be set larger, thereby increasing the effective vibration space of the diaphragm 50, and thus the frequency response of the speaker 100 can be increased. Moreover, when the diaphragm 50 with a curved shape and the diaphragm 50 with a planar shape have the same area, after adopting the diaphragm 50 with a curved shape in the embodiment of the present invention, the size of the entire speaker 100 can be reduced to a smaller size, so that the size of the whole machine can be smaller. At the same time, the flat voice coil 40 occupies less space, and the space saved by the flat voice coil 40 can be used for the first magnet part 21 and the second magnet part 22 to be designed with larger sizes. The larger-sized first magnet part 21 and second magnet part 22, in turn, can ensure that the flat voice coil 40 receives a larger magnetic force, ensuring that the diaphragm 50 has a better vibration effect. Therefore, the flat voice coil 40, the curved diaphragm 50, and the vertically arranged surround cooperate with each other to jointly achieve the effect that the speaker 100 has a smaller size and better acoustic performance.

[0042] Specifically, referring to Figure 2 , the extending direction of the surround part 52 deviating from the outer peripheral side of the central part 51 can be set, that is, the extending direction of the surround part 52 is inconsistent with the extending direction of the outer peripheral side of the central part 51, so as to form an included angle between the surround part 52 and the outer peripheral side of the central part 51, so that the surround part 52 occupies as little effective sounding area as possible.

[0043] Specifically, referring to Figure 2 , the included angle is θ, and the surround part 52 should extend as much as possible in the direction away from the center of the central part 51, so that the central part 51 can vibrate better, but the inclination direction should not be too large, so as not to increase the space of the ineffective sounding area of the diaphragm 50. Among them, generally 90° ≤ θ ≤ 115°. Preferably, the included angle θ is 90°, and the vibration effect of the diaphragm 50 is the best.

[0044] Referring to Figure 5 and Figure 6, the surround portion 52 has a bent section that bends back and forth along the direction of approaching and departing from the central portion 51, so that the diaphragm 50 has good compliance. The central portion 51 is made of a lightweight material, such as a foaming material; the surround portion 52 is generally made of a flexible material such as rubber.

[0045] In this embodiment, the surround portion 52 extends toward the side of the central portion 51 facing away from the flat voice coil 40. Correspondingly, the edge portion 53 is also on the side of the central portion 51 facing away from the flat voice coil 40, so that when the diaphragm 50 is installed in the housing 10, the edge portion 53 is closer to the opening of the housing 10, making it more convenient for installation and disassembly.

[0046] In order to make the area of the central portion 51 larger, the edge portion 53 can extend along the vibration direction and away from the central portion 51, so that the peripheral side of the central portion 51 can be as close as possible to the inner side wall of the housing 10, so that the edge portion 53 does not occupy the effective sound - generating space, thereby making the area of the central portion 51 larger.

[0047] In this embodiment, reference can be made in combination with Figure 1 and Figure 2 , the housing 10 includes a main body 101 and a cover plate covering the port of the main body 101. The diaphragm 50 can be placed into the main body 101 from the port, and the cover 102 covering the port can prevent dust from entering the speaker 100 and affecting the acoustic performance.

[0048] Moreover, the cover plate is also in a bent shape. The edge portion 53 is close to the cover plate and connected to the inner side wall of the main body 101. The bent shape of the central portion 51 is adapted to the bent shape of the cover plate, so that the diaphragm 50 can be better matched with the housing 10.

[0049] The edge portion 53 extends along the vibration direction of the diaphragm 50. The edge portion 53 has an inner side facing the central portion 51 and an outer side facing away from the central portion 51. A connecting groove is formed on the outer side of the edge portion 53, that is, the edge portion 53 can be bent back and forth along the inner and outer directions of the central portion 51 to form the connecting groove; a connecting rib 12 is protruded on the inner side wall of the housing 10 and is matched with the connecting groove, thereby fixedly installing the diaphragm 50 on the housing 10. Through the cooperation of the connecting rib 12 and the connecting groove, a mutually - engaged structure is formed between the housing 10 and the edge portion 53 of the diaphragm 50, which can prevent the edge portion 53 from moving axially along the housing 10. In addition, the contact area between the two is increased, achieving a better connection effect on the edge portion 53 of the diaphragm 50.

[0050] And to make the appearance of the speaker more beautiful, the main body has a first end face near the edge part, and the first end face is in a curved shape, and the curved shape of the first end face is adapted to the curved shape of the central part. Optionally, the bending curvature of the first end face is the same as the bending curvature of the diaphragm. With such a formed structure, the compatibility with the whole machine housing is higher, and the utilization rate of space is higher.

[0051] To better adapt to the curved shape of the whole machine housing, in one embodiment, reference can be made in combination with Figure 1 and Figure 5 , the diaphragm 50 is in a curved shape along the length direction of the magnetic gap 23. In this embodiment, the arrangement direction of the first magnet part 21 and the second magnet part 22 is the width direction of the magnetic gap 23, and the vibration direction of the diaphragm is the depth direction of the magnetic gap 23. And the diaphragm 50 is not bent in the width direction of the magnetic gap 23. For example, if the whole machine housing is in a circular ring shape, the diaphragm 50 being in a curved shape along the length direction of the magnetic gap 23 can better match the circular-ring-shaped whole machine housing.

[0052] The flat voice coil 40 is used to drive the diaphragm 50 to vibrate. The flat voice coil 40 can be directly connected to the diaphragm 50, or the flat voice coil 40 and the diaphragm 50 are connected through other components, such as a bracket.

[0053] The axis of the flat voice coil 40 is perpendicular to the vibration direction of the diaphragm 50. For example, in some embodiments, the axis of the flat voice coil 40 is along the transverse direction, and the flat voice coil 40 moves in the up and down direction in the magnetic gap 23; the diaphragm 50 extends generally along the transverse direction, and at the same time, the vibration direction of the diaphragm 50 is along the up and down direction.

[0054] The flat structure in the flat voice coil 40 means that the flat voice coil 40 is flat in its own axial direction. Specifically, the width between the inner peripheral surface and the outer peripheral surface of the flat voice coil 40 is greater than the thickness of the flat voice coil 40 in the axial direction.

[0055] The flat voice coil 40 is formed by winding a conductive wire. The number of layers of the conductive wire in the axial direction of the flat voice coil is less than the number of turns of the conductive wire in the radial direction of the flat voice coil. In this embodiment, the conductive wire of the flat voice coil 40 is distributed along its radial direction, that is, wound in the radial direction. The height of the flat voice coil 40 along its own axial direction is small. For example, along its own axial direction, the number of layers formed by winding the conductive wire of the flat voice coil 40 can be one layer or a small number of layers, so that the thickness of the flat voice coil 40 in the axial direction is small; while along its own radial direction, the number of turns of the conductive wire of the flat voice coil 40 is large, so that the width formed by multiple turns of the conductive wire is large, thus making the flat voice coil 40 form a flat structure with a small axial thickness and a large radial width.

[0056] For example, the axial direction of the flat voice coil 40 is along the width direction of the magnetic gap 23, which can make the distance between the first magnet part 21 and the second magnet part 22 forming the magnetic gap 23 smaller, and the structure of the entire speaker 100 can be flat in the width direction of the magnetic gap 23.

[0057] By adopting the flat voice coil 40 and making the axial direction of the flat voice coil 40 along the width direction of the magnetic gap 23, the width of the magnetic gap 23 can be reduced, that is, the space occupied by the magnetic gap 23 becomes smaller, thereby correspondingly saving the internal space of the speaker 100, enabling the speaker 100 to have a larger space to accommodate the magnetic circuit system. In this way, the acoustic performance can be improved by increasing the size of the magnetic circuit system. That is, without increasing the external dimensions of the speaker 100, the volume of the magnetic circuit system can be larger, and the effect on the flat voice coil 40 is better, making the vibration amplitude of the diaphragm 50 larger. Especially when the width dimension of the speaker 100 is limited, increasing the size of the magnetic circuit system can maintain the good acoustic performance of the speaker 100.

[0058] In this embodiment, the width direction of the magnetic gap refers to the distribution direction of the first magnet part 21 and the second magnet part 22.

[0059] The flat voice coil has two first wire segments 41 that are spaced apart along the vibration direction. The two first wire segments 41 are respectively located in the first magnetic gap 24 and the second magnetic gap 25, that is, one first wire segment 41 is located in the first magnetic gap 24, and the other first wire segment is located in the second magnetic gap 25. In this way, both of the two first wire segments 41 are subjected to magnetic force in the same direction, which has a superimposed effect on the vibration of the diaphragm.

[0060] Please refer to Figure 1 and Figure 4 , in which, the magnetic circuit system includes a first magnet part 21 and a second magnet part 22 that are spaced apart to form a magnetic gap 23. A first magnetic gap 24 is formed between the two opposite magnetic poles at the upper part of the first magnet part 21 and the second magnet part 22, and a second magnetic gap 25 is formed between the two opposite magnetic poles at the lower part of the first magnet part 21 and the second magnet part 22, 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.

[0061] In this embodiment, the upper part of the first magnet part 21 and the upper part of the second magnet part 22 refer to the end close to the diaphragm 50, and the lower part of the first magnet part 21 and the lower part of the second magnet part 22 refer to the end far from the diaphragm 50, that is, the end close to the magnetic yoke 30.

[0062] The first magnetic gap 24 and the second magnetic gap 25 are distributed along the vibration direction of the vibration system, and the first magnetic gap 24 and the second magnetic gap 25 together constitute the magnetic gap 23 of the magnetic circuit system.

[0063] The two opposite magnetic poles of different polarities mean that the ends of the first magnet part 21 and the second magnet part 22 (referring to the upper or lower part) that are close to each other are an N pole and an S pole respectively. For example, the ends of the first magnet part 21 and the second magnet part 22 that are close to each other are an N pole and an S pole respectively.

[0064] The distance between the first magnet part 21 and the second magnet part 22 is relatively close. Thus, the width of the formed magnetic gap 23 is relatively narrow, and its shape is generally long and narrow.

[0065] The magnetic circuit system may further include a magnetic yoke 30. The first magnet part 21 and the second magnet part 22 are arranged on the magnetic yoke 30, and the first magnet part 21 and the second magnet part 22 are arranged at intervals along the plane of the magnetic yoke 30.

[0066] The present invention also provides an electronic device, which includes a housing and a speaker 100. For the structure of the speaker 100, please refer to the above embodiments and will not be elaborated here. The electronic device may specifically be a wearable electronic device, such as a watch. In addition, the electronic device may also be an earphone, a mobile phone, a laptop computer, a VR device, an AR device, a television, etc.

[0067] Wherein, the housing is in a curved shape, and the bending direction of the housing is the same as the bending direction of the diaphragm 50 of the speaker 100. Optionally, the bending curvature of the housing is the same as the bending curvature of the diaphragm 50. Thus, the bending arc of the diaphragm 50 can perfectly fit the bending arc of the housing, and an arc-shaped vibration space is formed between the two, which is convenient for the vibration of the diaphragm 50 and can greatly improve the space utilization rate.

[0068] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure made by using the specification and drawings of the present invention, directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. A loudspeaker, characterized in that, it includes a housing, a magnetic circuit system and a vibration system. The housing forms a receiving space for receiving and fixing the magnetic circuit system and the vibration system. The housing includes a main body; The magnetic circuit system includes a first magnet part and a second magnet part that are spaced apart to form a magnetic gap. A first magnetic gap is formed between two opposite magnetic poles at the upper part of the first magnet part and the second magnet part, and a second magnetic gap is formed between two opposite magnetic poles at the lower part. Moreover, the magnetic pole distribution directions of the two opposite magnetic poles at the upper part and the two opposite magnetic poles at the lower part are opposite; The vibration system includes a diaphragm and a flat voice coil that drives the diaphragm to vibrate. The flat voice coil is located in the magnetic gap. The axis of the flat voice coil is perpendicular to the vibration direction of the diaphragm. The flat voice coil has two first wire segments that are spaced apart along the vibration direction, and the two first wire segments are respectively located in the first magnetic gap and the second magnetic gap; The diaphragm includes a central part, a surround part annularly arranged on the outer peripheral side of the central part, and an edge part annularly arranged on the outer peripheral side of the surround part; the central part is in a curved shape and protrudes away from the flat voice coil, and the central part is in a curved shape along the length direction of the magnetic gap; The surround part is connected to the edge of the central part and bends and extends in the vibration direction of the diaphragm; the surround part deviates from the extending direction of the outer peripheral side of the central part and is inclined towards the main body, so that an included angle is formed between the surround part and the outer peripheral side of the central part, and the included angle is θ, where 90° ≤ θ ≤ 115°, and the edge part is connected to the inner side wall of the main body; The surround part extends towards the side of the central part facing away from the flat voice coil, the edge part is connected to one end of the surround part facing away from the central part, and the surround part and the central part are located inside the housing and are not set beyond the end face of the housing.

2. The loudspeaker according to claim 1, characterized in that, the surround part has a curved section that bends and extends back and forth along the direction of approaching and departing from the central part.

3. The loudspeaker according to claim 1, characterized in that, the edge part extends along the vibration direction and away from the central part.

4. The loudspeaker according to claim 1, characterized in that, the housing further includes a cover plate covering the port of the main body, and the cover plate is in a curved shape; the edge part is close to the cover plate, and the curved shape of the central part is adapted to the curved shape of the cover plate.

5. The loudspeaker according to claim 1, characterized in that, the main body has a first end face close to the edge part, and the first end face is in a curved shape, and the curved shape of the first end face is adapted to the curved shape of the central part.

6. The loudspeaker according to claim 1, characterized in that, the edge part extends along the vibration direction of the diaphragm. The edge part has an inner side facing the central part and an outer side facing away from the central part, and a connecting groove is formed on the outer side of the edge part; On the inner sidewall of the housing, there are convex connection ribs that match the connection grooves.

7. The loudspeaker according to claim 1, characterized in that, the number of layers of conductive wires in the axial direction of the flat voice coil is less than the number of turns of the conductive wires in the radial direction of the flat voice coil.

8. An electronic device, characterized in that, it includes a housing and the loudspeaker according to any one of claims 1 to 7, the housing is in a curved shape, and the bending direction of the housing is the same as the bending direction of the central part of the diaphragm of the loudspeaker.

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