An electroacoustic conversion device and an electronic device

Abstract

Embodiments of the present invention provide an electroacoustic conversion device. By providing a reinforcing portion on the side magnet in the embodiments of the present invention, the upper surface of the reinforcing portion is closer to the lowest position that the diaphragm can move to, so as to make full use of the space inside the electroacoustic conversion device, increase the volume of the side magnet, enhance the magnetic field strength of the electroacoustic conversion device, and further improve the sensitivity of the electroacoustic conversion device and enhance the sound quality of the electroacoustic conversion device.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic products, and in particular, to an electroacoustic conversion device and an electronic device. Background Art

[0002] An electroacoustic conversion device is a device that converts electrical energy into sound energy, which mainly relies on the vibration of a diaphragm to repeatedly push air to generate sound. However, the sound effect of existing electroacoustic conversion devices still needs to be improved. Summary of the Invention

[0003] In view of this, the present invention provides an electroacoustic conversion device and an electronic device to improve the sound effect of the electroacoustic conversion device by increasing the size of the side magnet.

[0004] In a first aspect, an embodiment of the present invention provides an electroacoustic conversion device. The electroacoustic conversion device provided by the embodiment of the present invention includes:

[0005] A diaphragm;

[0006] A central magnet, located below the diaphragm;

[0007] A side magnet, located outside the central magnet, forming a magnetic gap with the central magnet, including a main body portion and a reinforcing portion, a side surface on a first side of the main body portion facing the edge of the central magnet, and the reinforcing portion protruding upward from a second side of the main body portion;

[0008] A voice coil, partially located in the magnetic gap, fixedly connected to the diaphragm, and configured to drive the diaphragm to vibrate and generate sound;

[0009] A chassis, fixedly connected to the diaphragm, and configured to support the diaphragm;

[0010] A first upper pole piece, the lower surface of which is in shape fit with the upper surface of the side magnet, and the upper surface is located below the lowest position of the diaphragm;

[0011] A second upper pole piece, located on the central magnet and fixedly connected to the central magnet; and

[0012] A lower pole piece, located below the central magnet and the side magnet and fixedly connected to the central magnet and the side magnet..

[0013] Preferably, the reinforcing portion is located below the lowest position of the diaphragm.

[0014] Preferably, the diaphragm includes:

[0015] A surround, the inner side of which is fixedly connected to the voice coil, the surround is made of a flexible material, and in response to the voice coil being in the lowest position, the surround includes a first arc surface that is recessed downward.

[0016] Preferably, the reinforcing portion includes a first plane located on the outer side and a second arc surface extending from the inner end of the first plane towards the central magnet;

[0017] The second arc surface and the portion of the first arc surface located above the second arc surface have the same radian;

[0018] Wherein, the position of the first plane is higher than the upper surface of the main body portion.

[0019] Preferably, the dimension of the first plane along the first axial direction is less than or equal to the distance extending from the outer end of the first plane along the first axial direction to the first arc surface.

[0020] Preferably, the reinforcing portion includes a second plane located on the outer side and a first inclined surface extending obliquely downward from the inner end of the second plane;

[0021] Wherein, the position of the second plane is higher than the upper surface of the main body portion.

[0022] Preferably, the dimension of the second plane along the first axial direction is less than or equal to the distance extending from the outer end of the second plane along the first axial direction to the first arc surface;

[0023] The included angle between the second plane and the first inclined surface is less than or equal to the included angle between the second plane and the tangent plane of the first arc surface at the first position;

[0024] Wherein, the coordinates of the first position and the second plane in the second axial direction are the same.

[0025] Preferably, the reinforcing portion includes a third plane located on the outer side, a second inclined surface extending obliquely downward from the inner end of the third plane, and a vertical surface extending downward from the lower end of the second inclined surface;

[0026] Wherein, the position of the third plane is higher than the upper surface of the main body portion;

[0027] The dimension of the third plane along the first axial direction is less than or equal to the distance extending from the outer end of the third plane along the first axial direction to the first arc surface.

[0028] Preferably, the main body portion and the reinforcing portion are integrally formed;

[0029] Wherein, the electro-acoustic conversion device includes two side magnets;

[0030] The two side magnets are oppositely arranged on both sides of the central magnet.

[0031] In a second aspect, an embodiment of the present invention provides an electronic device. The electronic device includes the electro-acoustic conversion device as described in the first aspect.

[0032] An embodiment of the present invention provides an electroacoustic conversion device. By providing a reinforcing portion on the side magnet in the embodiment of the present invention, the upper surface of the reinforcing portion is closer to the lowest position that the diaphragm can move to, which can make full use of the space inside the electroacoustic conversion device, increase the volume of the side magnet, enhance the magnetic field strength of the electroacoustic conversion device, and thus improve the sensitivity of the electroacoustic conversion device and enhance the sound quality of the electroacoustic conversion device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Through the following description of the embodiments of the present invention with reference to the drawings, the above and other objects, features, and advantages of the present invention will become clearer. In the drawings:

[0034] Figure 1 is a three-dimensional schematic diagram of the electroacoustic conversion device of the comparative example of the present invention;

[0035] Figure 2 is a cross-sectional schematic diagram of the electroacoustic conversion device of the comparative example of the present invention;

[0036] Figure 3 is a schematic diagram of the central magnet and side magnet of the electroacoustic conversion device of the comparative example of the present invention;

[0037] Figure 4 is a three-dimensional schematic diagram of the electroacoustic conversion device of the first embodiment of the present invention;

[0038] Figure 5 is a cross-sectional view along line AA of the first implementation manner of the electroacoustic conversion device of the first embodiment of the present invention in a static state;

[0039] Figure 6 is a cross-sectional view along line AA of the first implementation manner of the electroacoustic conversion device of the first embodiment of the present invention when the voice coil is at the lowest position;

[0040] Figure 7 is a schematic diagram of the side magnet of the first implementation manner of the first embodiment of the present invention;

[0041] Figure 8 is an exploded view of the first implementation manner of the first embodiment of the present invention;

[0042] Figure 9 is a cross-sectional view along line AA of the second implementation manner of the first embodiment of the present invention;

[0043] Figure 10 is a schematic diagram of the side magnet of the second implementation manner of the first embodiment of the present invention;

[0044] Figure 11 is a cross-sectional view along line AA of the third implementation manner of the first embodiment of the present invention;

[0045] Figure 12Schematic diagram of the side magnet of the third implementation mode of the first embodiment of the present invention;

[0046] Figure 13 Schematic diagram of the electronic device of the second embodiment of the present invention.

[0047] Description of reference numerals:

[0048] x First axial direction; z Second axial direction; y Third axial direction; 10 Diaphragm; 11 Surround; 12 Middle sticker; 20 Central magnet; 30 Side magnet; 31 Main body part; 311 First part; 312 Second part; 32 Reinforcing part; 321 First arc surface; 322 Second arc surface; 323 First plane; 324 Second plane; 325 First inclined plane; 326 Third plane; 327 Second inclined plane; 328 Vertical plane; 33 First side; 34 Second side; 40 Voice coil; 50 Frame; 60 First upper pole piece; 70 Second upper pole piece; 80 Lower pole piece; 100 Electro-acoustic conversion device. Detailed implementation manners

[0049] The present invention will be described below based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the embodiments of the present invention, some specific details are described in detail. Those skilled in the art can fully understand the present invention without the description of these detail parts. In order to avoid obscuring the essence of the present invention, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0050] In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only, and the drawings are not necessarily drawn to scale.

[0051] Unless the context clearly requires otherwise, the words such as "including" and "comprising" in the specification should be interpreted in an inclusive sense rather than an exclusive or exhaustive sense; that is, the meaning of "including but not limited to".

[0052] In the description of the embodiments of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the embodiments of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0053] Unless otherwise clearly defined and limited, the terms "install", "connect", "join", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] When an element or layer is referred to as being "on", "joined to", "connected to", or "coupled to" another element or layer, it can be directly on the other element or layer, directly joined, connected, or coupled to the other element or layer, or there can be intermediate elements or layers. In contrast, when an element is referred to as being "directly" "on", "directly joined to", "directly connected to", or "directly coupled to" another element or layer, there can be no intermediate elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0055] For ease of description, spatially relative terms such as "inner", "outer", "beneath", "below", "lower", "above", "upper", etc. are used herein to describe the relationship of one element or feature illustrated in the figures to another element or feature. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as "below" or "beneath" another element or feature will then be oriented "above" that other element or feature. Thus, the exemplary term "below" can encompass both the orientation of above and below. The device can be otherwise oriented, and the spatially relative descriptive terms used herein should be interpreted accordingly.

[0056] Figure 1 is a perspective view of a comparative electroacoustic conversion device. Figure 2 is along Figure 1 the sectional view taken along line AA in Figure 3 is a schematic diagram of the central magnet and the side magnet of the comparative electroacoustic conversion device. As Figures 1 - 3 shown, the upper surfaces of the side magnet 2 and the central magnet 3 of the comparative example are basically the same in the coordinate of the second axis z, that is to say, the upper surfaces of the side magnet 2 and the central magnet 3 are located in the same horizontal plane. In the comparative example, the space between the diaphragm 1 and the side magnet 2 is not fully utilized, and the sensitivity of the electroacoustic conversion device needs to be improved.

[0057] In view of this, in order to improve the sensitivity of the electroacoustic conversion device, an embodiment of the present invention provides an electroacoustic conversion device. To make full use of the space between the edge magnet and the diaphragm, the height of the edge magnet in a predetermined area is increased to enhance the magnetic field strength, thereby improving the sensitivity of the electroacoustic conversion device.

[0058] Figures 4 - 12 It is a schematic diagram of the electroacoustic conversion device according to an embodiment of the present invention. As Figures 4 - 12 shown, the electroacoustic conversion device 100 includes: a diaphragm 10, a central magnet 20, an edge magnet 30, a voice coil 40, a chassis 50, a first upper pole piece 60, a second upper pole piece 70, and a lower pole piece 80.

[0059] Figure 5 It is a three-dimensional schematic diagram of the electroacoustic conversion device according to the first embodiment of the present invention. The diaphragm 10 includes a surround 11 and a central patch 12. The surround 11 is annular, and the central patch 12 is used to close the middle area of the surround 11. Among them, the surround 11 can be made of a flexible material, specifically, it can be one of silicone, polyimide (PI), thermoplastic elastomer (TPE), thermoplastic polyester elastomer (TPEE), polyether ether ketone (PEEK), polyethylene naphthalate (PEN), polyetherimide (PEI), polyurethane (PU), paper, and breathable mesh cloth. Further, the surround 11 can be set as an elastic material, preferably silicone. Setting the surround 11 as an elastic material can improve the lifespan of the surround 11, avoid the diaphragm 10 from cracking and failing due to long-term vibration of the diaphragm 10. And it can avoid the voice coil 40 from swaying and improve the sound quality.

[0060] The central patch 12 can be a non-flexible material. While pushing the air to vibrate and generate sound, the central patch 12 can play a role in waterproofing and dustproofing.

[0061] Figure 5 It is a sectional view of the first implementation manner of the electroacoustic conversion device according to the first embodiment of the present invention along line AA in the static state. As Figure 5As shown, in the static state, the cross-section of the surround 11 includes a downwardly concave arch and a first connecting portion and a second connecting portion extending horizontally from both ends of the arch to both sides of the arch. Among them, the first connecting portion is located on the inner circumference of the arch and is fixedly connected to the middle patch 12. Specifically, the middle patch 12 can be arranged above or below the surround 11. In this embodiment, the middle patch 12 is arranged below the surround 11, and the upper surface of the middle patch 12 and the lower surface of the first connecting portion are adhesively fixed. The second connecting portion is located on the outer circumference of the arch and is fixedly connected to the chassis 50. By using the downwardly concave surround 11 in the electro-acoustic conversion device 100, problems such as the collapse and deformation of the diaphragm 10 can be avoided, and the waterproof performance of the electro-acoustic conversion device 100 can be improved.

[0062] Figure 6 is a sectional view along line AA when the voice coil is at the lowest position in the first implementation manner of the electro-acoustic conversion device according to the first embodiment of the present invention. As Figure 6 shown, during the operation of the electro-acoustic conversion device 100, the diaphragm 10 vibrates with the voice coil 40. When the voice coil 40 is at the lowest position, the diaphragm is also at the lowest position, and the surround 11 will undergo elastic deformation. The cross-section of the surround 11 changes from a downwardly concave arch to a downwardly concave first arc surface 321.

[0063] The central magnet 20 is located below the diaphragm 10. The side magnet 30 is located outside the central magnet 20 and forms a magnetic gap with the central magnet 20. In this embodiment, taking the electro-acoustic conversion device 100 with a three-magnetic-circuit as an example for illustration, two side magnets 30 are arranged on both sides of the central magnet 20. In other alternative implementation manners, one side magnet 30 can be arranged on the outside of each of the four side surfaces of the central magnet 20.

[0064] The side magnet 30 includes a main body portion 31 and a reinforcing portion 32. The side surface of the first side 33 of the main body portion 31 faces the edge of the central magnet 20, and the reinforcing portion 32 protrudes upward from the second side 34 of the main body portion 31; the first side and the second side are oppositely arranged.

[0065] Among them, the main body portion 31 and the reinforcing portion 32 are integrally formed. Specifically, a machining process can be adopted to form them.

[0066] Figure 7 is a schematic diagram of the central magnet and the side magnet in the first implementation manner of the first embodiment of the present invention. Figure 8 is an exploded view of the first implementation manner of the first embodiment of the present invention. As Figure 7 shown, the reinforcing portion 32 includes a first plane 323 located above the outer region of the upper surface of the main body portion and a second arc surface 322 extending from the inner end of the first plane 323 towards the central magnet 20.

[0067] The radian of the second arc surface 322 and the part of the first arc surface 321 above the second arc surface 322 is the same. Among them, the position of the first plane 323 is higher than the upper surface of the main body part 31. The dimension of the first plane 323 along the first axial direction x is less than or equal to the distance from the outer end of the first plane to the first arc surface 321.

[0068] In this implementation, the long side of the side magnet 30 is arranged along the third axial direction y. The side magnet 30 includes a main body part 31, and the main body part 31 includes a first part 311 and a second part 312 located outside the first part 311. The dimension of the first part 311 along the third axial direction y is greater than the dimension of the second part 312 along the third axial direction y. Among them, the second part 312 is matched with the concave area of the speaker frame 50. The reinforcing part 32 is an irregular structure protruding upward from a predetermined area on the upper surface of the main body part 31. In this implementation, the predetermined area includes the upper surface of the second part 312 and the area extending from the upper surface of the second part 312 to the edge of the first part 311 in the direction of the central magnet 20. The first plane 323 is arranged parallel above the second part 312 of the main body part 31. The height of the reinforcing part 32 is the highest in the area of the first plane 323, and in the area where the first plane 323 extends inward, the height of the reinforcing part 32 gradually decreases.

[0069] A first upper pole piece 60 matching the shape of the reinforcing part 32 is arranged on the upper surface of the side magnet 30, and the height of the reinforcing part 32 is set so that the distance from the upper surface of the reinforcing part 32 along the second axial direction z to the lowest position of the surround 11 is greater than or equal to the thickness of the first upper pole piece 60.

[0070] The first upper pole piece 60 is used for magnetic conduction, and the first upper pole piece 60 can be a ring formed by stamping a metal sheet. It is located above the side magnet 30 and on the supporting surface of the speaker frame 50.

[0071] In this implementation, the reinforcing part 32 is designed as an arc shape that fits the shape of the diaphragm 10, making the most of the space of the electro-acoustic conversion device 100.

[0072] Figure 9 It is a sectional view along the AA line of the second implementation of the first embodiment of the present invention. Figure 10 It is a schematic diagram of the central magnet and the side magnet of the second implementation of the first embodiment of the present invention. As Figure 9 and Figure 10 shown, the reinforcing part 32 includes a second plane 324 located on the outside and a first inclined plane 325 extending obliquely downward from the inner end of the second plane 324. Among them, the position of the second plane 324 is higher than the upper surface of the main body part 31.

[0073] In this implementation manner, the dimension of the second plane 324 along the first axial direction x is slightly smaller than the distance from the outer end of the second plane 324 extending along the first axial direction x to the first arc surface 321. The included angle between the second plane 324 and the first inclined surface 325 is less than or equal to the included angle between the second plane 324 and the tangent plane of the first arc surface 321 at the first position. Wherein, the coordinates of the first position and the second plane 324 in the second axial direction z are the same.

[0074] The reinforcing part 32 is an irregular structure protruding upward from a predetermined area on the upper surface of the main body part 31. Different from the first implementation manner, in this implementation manner, the predetermined area is the upper surface of the second part 312 and the area extending inward from the upper surface of the second part 312 by a first distance. The first distance is smaller than the dimension of the first part along the first axial direction x. The second arc surface 322 is changed to the first inclined surface 325. The height of the reinforcing part 32 is the highest in the area of the second plane 324, and in the area where the second plane 324 extends inward, the height of the reinforcing part 32 gradually decreases.

[0075] The inclined surface is easier to process than the arc surface. In this implementation manner, the upper surface of the reinforcing part 32 is set as an inclined surface, and by replacing the arc surface with an inclined surface, the processing difficulty of the side magnet 30 can be reduced.

[0076] Figure 11 It is a sectional view along the AA line of the third implementation manner of the first embodiment of the present invention. Figure 12 It is a schematic diagram of the central magnet and the side magnet of the third implementation manner of the first embodiment of the present invention. As Figure 11 and Figure 12 shown, the reinforcing part 32 includes a third plane 326 located on the outer side, a second inclined surface 327 extending obliquely downward from the inner end of the third plane 326, and a vertical surface 328 extending downward from the lower end of the second inclined surface 327. Wherein, the position of the third plane 326 is higher than the upper surface of the main body part 31. The second plane 324, the second inclined surface 327 and the vertical surface 328 are located below the first arc surface 321.

[0077] Different from the second implementation manner, the first inclined surface 325 is replaced by the second inclined surface 327 and the vertical surface 328. Wherein, the included angle between the second inclined surface 327 and the third plane 326 is smaller than the included angle between the first plane 323 and the third plane 326.

[0078] In this implementation manner, by reducing the area of the inclined surface, the side magnet 30 can be made more convenient to process.

[0079] Part of the voice coil 40 is located in the magnetic gap and is fixedly connected to the diaphragm 10, and is used to drive the diaphragm 10 to vibrate and generate sound. The voice coil 40 is a conductive coil. After passing an electric current through the voice coil 40, it is subjected to the action of the Ampere force in the magnetic field and vibrates back and forth, thereby driving the diaphragm 10 to vibrate and generate sound.

[0080] The chassis 50 is located outside the side magnet 30, and the upper surface of the chassis 50 is fixedly connected to the diaphragm 10 for supporting the diaphragm 10.

[0081] The second upper pole piece 70 is located on the central magnet 20 and is fixedly connected to the central magnet 20.

[0082] The lower pole piece 80 is located below the central magnet 20 and the side magnet 30. The upper surface of the lower pole piece 80 is fixedly connected to the central magnet 20 and the side magnet 30. The outer periphery of the lower pole piece 80 is fixedly connected to the bottom of the chassis 50.

[0083] The electroacoustic conversion device 100 according to the embodiment of the present invention can be a micro speaker, such as a phone speaker or a speaker in a smart phone, or other similar compact electronic devices, such as a notebook or a tablet computer. The electroacoustic conversion device 100 can be enclosed in or integrated into the housing or casing of the device where it is located.

[0084] The outer shape of the electroacoustic conversion device 100 according to the embodiment of the present invention can be different shapes such as a cylinder, a cube, and an irregular shape, which are not limited herein and can be freely selected according to the application scenario of the electroacoustic conversion device 100.

[0085] It should be understood that the diaphragm 10, the voice coil 40, the chassis 50, and the magnetic assembly can all be adaptively adjusted according to the shape and size of the electroacoustic conversion device 100, which are not limited herein.

[0086] In the embodiment of the present invention, by providing the reinforcing portion 32 on the side magnet 30, the upper surface of the reinforcing portion 32 is closer to the lowest position that the diaphragm 10 can move to, which can make full use of the space inside the electroacoustic conversion device 100, increase the volume of the side magnet 30, enhance the magnetic field strength of the electroacoustic conversion device 100, and thus improve the sensitivity of the electroacoustic conversion device 100 and enhance the sound quality of the electroacoustic conversion device 100.

[0087] In the second embodiment of the present invention, an electronic device is provided, and the electronic device includes the electroacoustic conversion device 100 as described in the second embodiment.

[0088] Figure 13 is a schematic diagram of the electronic device according to the second embodiment of the present invention. As Figure 13 shown, in this embodiment, the electronic device is a mobile phone and includes the electroacoustic conversion device 100 as described in the second embodiment.

[0089] In other alternative implementation manners, the electronic device can also be a tablet computer, a game console, a television, a headset, a smart watch, and a speaker, etc.

[0090] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electroacoustic conversion device (100), characterized in that, the electroacoustic conversion device (100) comprises: a diaphragm (10); a central magnet (20), located below the diaphragm (10); a side magnet (30), located outside the central magnet (20), forming a magnetic gap with the central magnet (20), including a main body portion (31) and a reinforcing portion (32), a side surface of a first side of the main body portion (31) being opposite to an edge of the central magnet (20), the reinforcing portion (32) protruding upward from a second side of the main body portion (31), the reinforcing portion (32) being located below a lowest position of the diaphragm (10); a voice coil (40), partially located in the magnetic gap, fixedly connected to the diaphragm (10), for driving the diaphragm (10) to vibrate and generate sound; a chassis (50), fixedly connected to the diaphragm (10), for supporting the diaphragm (10); a first upper pole piece (60), a lower surface of which is in shape fit with an upper surface of the side magnet (30), and an upper surface of which is located below a lowest position of the diaphragm (10); a second upper pole piece (70), located on the central magnet (20), fixedly connected to the central magnet (20); and a lower pole piece (80), located below the central magnet (20) and the side magnet (30), fixedly connected to the central magnet (20) and the side magnet (30); wherein, a height of the reinforcing portion (32) is set such that a distance from an upper surface of the reinforcing portion (32) along a second axis (z) to a lowest position of the diaphragm (10) is greater than or equal to a thickness of the first upper pole piece (60).

2. The electroacoustic conversion device (100) according to claim 1, characterized in that, the diaphragm (10) comprises: a surround (11), an inner side of which is fixedly connected to the voice coil (40), the surround (11) being made of a flexible material, and in response to the voice coil (40) being in a lowest position, the surround (11) comprises a first arc surface (321) recessed downward.

3. The electroacoustic conversion device (100) according to claim 2, characterized in that, the reinforcing portion (32) comprises a first plane (323) located on an outer side and a second arc surface (322) extending from an inner end of the first plane (323) towards the central magnet (20); the second arc surface (322) and a part of the first arc surface (321) located above the second arc surface (322) have the same radian; wherein, a position of the first plane (323) is higher than an upper surface of the main body portion (31).

4. The electroacoustic conversion device (100) according to claim 3, characterized in that, a dimension of the first plane (323) along a first axis (x) is less than or equal to a distance extending from an outer end of the first plane (323) along the first axis (x) to the first arc surface (321).

5. The electroacoustic conversion device (100) according to claim 2, characterized in that, The reinforcing portion (32) includes a second plane (324) located on the outer side and a first inclined surface (325) extending obliquely downward from the inner end of the second plane (324); Wherein, the position of the second plane (324) is higher than the upper surface of the main body portion (31).

6. The electro-acoustic conversion device (100) according to claim 5, Characterized in that, The dimension of the second plane (324) along the first axis (x) is less than or equal to the distance extending from the outer end of the second plane (324) along the first axis (x) to the first arc surface (321); The included angle between the second plane (324) and the first inclined surface (325) is less than or equal to the included angle between the second plane (324) and the tangent plane of the first arc surface (321) at the first position; Wherein, the coordinates of the first position and the second plane (324) in the second axis (z) are the same.

7. The electro-acoustic conversion device (100) according to claim 2, Characterized in that, The reinforcing portion (32) includes a third plane (326) located on the outer side, a second inclined surface (327) extending obliquely downward from the inner end of the third plane (326), and a vertical surface (328) extending downward from the lower end of the second inclined surface (327); Wherein, the position of the third plane (326) is higher than the upper surface of the main body portion (31); The dimension of the third plane (326) along the first axis (x) is less than or equal to the distance extending from the outer end of the third plane (326) along the first axis (x) to the first arc surface (321).

8. The electro-acoustic conversion device (100) according to any one of claims 1-7, Characterized in that, The main body portion (31) and the reinforcing portion (32) are integrally formed; Wherein, the electro-acoustic conversion device (100) includes two side magnets (30); The two side magnets (30) are oppositely arranged on both sides of the central magnet (20).

9. An electronic device, Characterized in that, The electronic device includes the electro-acoustic conversion device (100) according to any one of claims 1-8.

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