Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a frame, a magnetic circuit assembly and a vibration assembly, the magnetic circuit assembly comprises a magnetic cover, a yoke, a central magnetic structure and an edge magnetic structure, the central magnetic structure and the edge magnetic structure are respectively arranged on the yoke, the edge magnetic structure is connected with the frame, and a first magnetic gap is formed between the edge magnetic structure and the central magnetic structure. The central magnetic structure comprises a first central magnetic steel, a first central washer, a second central magnetic steel, a second central washer and a third central magnetic steel which are sequentially stacked and connected from bottom to top, the magnetic cover comprises a top plate and a surrounding wall, and a second magnetic gap is formed between the surrounding wall and the central magnetic structure; the vibration assembly comprises a voice diaphragm, a ball top, a first voice coil and a second voice coil, the voice diaphragm comprises an inner folding ring part, a connecting part, an outer folding ring part and an outer fixing part, the outer fixing part is connected with the basin frame, the inner folding ring part is connected with the enclosure wall, the ball top is connected with the connecting part, the first voice coil is located at the first magnetic gap and connected with the ball top, and the second voice coil is located at the second magnetic gap and connected with the ball top. The miniature loudspeaker is excellent in performance and small in required installation area.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic converter technology, and in particular to a miniature loudspeaker. Background Technology

[0002] Miniature speakers are widely used in portable electronic devices such as mobile phones, laptops, and hearing aids. As these portable electronic devices become increasingly miniaturized, the requirements for the size and performance of the miniature electroacoustic devices used in them are becoming more and more stringent, demanding greater driving force within a relatively small size.

[0003] Dual voice coil microspeakers can provide greater driving force, but in existing dual voice coil microspeakers, the two voice coils are arranged side by side, which results in a larger installation area for dual voice coil microspeakers. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a high-performance miniature loudspeaker that requires a small installation area.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a miniature loudspeaker, comprising:

[0006] Sink stand;

[0007] A magnetic circuit assembly includes a magnetic cover, a yoke, and a central magnetic structure and a side magnetic structure respectively disposed on the yoke. The side magnetic structure is connected to the basket frame, and a first magnetic gap is formed between the side magnetic structure and the central magnetic structure. The central magnetic structure includes a first central magnet, a first central washer, a second central magnet, a second central washer, and a third central magnet stacked and connected sequentially from bottom to top. The magnetic cover includes a top plate and a surrounding wall that bends downward from the edge of the top plate, and a second magnetic gap is formed between the surrounding wall and the central magnetic structure.

[0008] A vibration assembly includes a diaphragm, a dome, a first voice coil, and a second voice coil. The diaphragm includes an inner folded ring portion, a connecting portion, an outer folded ring portion, and an outer fixing portion connected sequentially from the inside to the outside. The outer fixing portion is connected to the frame. The inner edge of the inner folded ring portion is connected to the surrounding wall. The dome is connected to the connecting portion. The first voice coil is located at the first magnetic gap and is connected to the bottom surface of the dome. The second voice coil is located at the second magnetic gap and is connected to the top surface of the dome.

[0009] In one embodiment, the diaphragm further includes an inner fixing portion in the shape of a ring frame, the outer edge of the inner fixing portion being connected to the inner edge of the inner folded ring portion, and the inner edge of the inner folded ring portion being indirectly connected to the enclosure wall through the inner fixing portion.

[0010] In one embodiment, the inner fixing part is fixedly connected to the bottom surface and / or the outer wall surface of the enclosure.

[0011] In one embodiment, the edge magnetic structure includes an edge magnet and an edge washer, the edge magnet connecting the yoke and the edge washer, and the edge magnetic structure as a whole is in the shape of a continuous ring; or, there are multiple edge magnetic structures, and the central magnetic structure is located between at least one set of two oppositely arranged edge magnetic structures.

[0012] In one embodiment, the edge washer is configured corresponding to the first central washer.

[0013] In one embodiment, the bottom surface of the enclosure is set below or flush with the top surface of the second central washer.

[0014] In one embodiment, the bottom surface of the enclosure is set higher than or flush with the bottom surface of the second central washer.

[0015] In one embodiment, the inner folded ring portion protrudes outward in a direction away from the yoke, and the outer folded ring portion is recessed in a direction closer to the yoke.

[0016] In one embodiment, the dimensions of the first voice coil are the same as or different from those of the second voice coil.

[0017] In one embodiment, a support assembly is further included, the support assembly connecting the frame to the first voice coil, the support assembly including a centering support and / or a secondary diaphragm.

[0018] The beneficial effects of this utility model are as follows: This miniature loudspeaker has a novel structure, adopts a dual voice coil architecture with the two voice coils arranged vertically. With each voice coil having its own magnetic circuit, the two magnetic circuits interact with each other, and the two voice coils move in the same direction, which greatly enhances the driving force of the vibration component and makes the acoustic performance of the miniature loudspeaker better. In addition, since the two voice coils are arranged vertically, the installation area required for this miniature loudspeaker can be made smaller, which can better meet the development trend of miniaturization of portable electronic devices. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a cross-sectional view of the miniature loudspeaker according to Embodiment 1 of this utility model;

[0021] Figure 2 This is a schematic diagram of a portion of the structure of the miniature speaker according to Embodiment 1 of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the miniature loudspeaker according to Embodiment 1 of this utility model.

[0023] Explanation of icon numbers:

[0024] 1. Pot stand;

[0025] 2. Magnetic circuit assembly; 21. Yoke; 22. Central magnetic structure; 221. First central magnet; 222. First central washer; 223. Second central magnet; 224. Second central washer; 225. Third central magnet; 23. Side magnetic structure; 231. Side magnet; 232. Side washer; 24. Magnetic cover; 241. Top plate; 242. Enclosure;

[0026] 3. Vibrating assembly; 31. Diaphragm; 311. Inner fixing part; 312. Inner folding ring part; 313. Connecting part; 314. Outer folding ring part; 315. Outer fixing part; 32. Dome; 33. First voice coil; 34. Second voice coil;

[0027] 4. Support components. Detailed Implementation

[0028] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that if the embodiments of this utility model involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0032] Furthermore, if the meaning of "and / or" appears throughout the text, it refers to three parallel solutions. For example, "and / or" includes solution 1, solution 2, and solution 3, which simultaneously satisfy the above conditions. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] Example 1

[0035] Please refer to Figures 1 to 3One embodiment of this utility model is a miniature loudspeaker, including a frame 1, a magnetic circuit assembly 2, and a vibration assembly 3. The magnetic circuit assembly 2 includes a magnetic cover 24, a yoke 21, and a central magnetic structure 22 and a side magnetic structure 23 respectively disposed on the yoke 21. The side magnetic structure 23 is connected to the frame 1, and a first magnetic gap is formed between the side magnetic structure 23 and the central magnetic structure 22. The central magnetic structure 22 includes a first central magnet 221, a first central washer 222, a second central magnet 223, a second central washer 224, and a third central magnet 225 stacked sequentially from bottom to top. The magnetic cover 24 includes a top plate 241 and a surrounding wall 242 extending downward from the edge of the top plate 241. The surrounding wall 242 is connected to the central magnetic structure 22. A second magnetic gap is formed; the vibration component 3 includes a diaphragm 31, a dome 32, a first voice coil 33, and a second voice coil 34. The diaphragm 31 includes an inner folded ring portion 312, a connecting portion 313, an outer folded ring portion 314, and an outer fixing portion 314 connected sequentially from the inside to the outside. The outer fixing portion 314 is connected to the frame 1. The inner folded ring portion 312 protrudes outward in a direction away from the yoke 21, and the outer folded ring portion 314 is concave in a direction close to the yoke 21. The inner edge of the inner folded ring portion 312 is connected to the enclosure wall 242. The dome 32 is connected to the connecting portion 313. The first voice coil 33 is located at the first magnetic gap and is connected to the bottom surface of the dome 32. The second voice coil 34 is located at the second magnetic gap and is connected to the top surface of the dome 32.

[0036] It is easy to understand that the magnetic pole orientation of the first central magnet 221 is opposite to that of the second central magnet 223, and the magnetic pole orientation of the second central magnet 223 is opposite to that of the third central magnet 225.

[0037] To facilitate the connection between the diaphragm 31 and the magnetic cover 24 and to ensure the stability of the inner folded ring portion 312, in this embodiment, the diaphragm 31 further includes an inner fixing portion 311 in the shape of a ring frame. The outer edge of the inner fixing portion 311 is connected to the inner edge of the inner folded ring portion 312, and the inner edge of the inner folded ring portion 312 is indirectly connected to the enclosure wall 242 through the inner fixing portion 311, that is, the inner fixing portion 311 is connected to the enclosure wall 242.

[0038] Optionally, in this embodiment, the inner fixing part 311 is glued to the bottom surface of the enclosure 242; in other embodiments, the inner fixing part 311 is fixedly connected to the outer wall surface of the enclosure 242; of course, it is also feasible for the inner fixing part 311 to be connected to both the bottom surface and the outer wall surface of the enclosure 242.

[0039] The edge magnetic structure 23 includes edge magnets 231 and edge washer 232. The edge magnets 231 connect the yoke 21 and the edge washer 232. In some embodiments, the edge magnetic structure 23 is a continuous ring-shaped structure. In one or more embodiments, there are multiple edge magnetic structures 23, and the central magnetic structure 22 is located between at least one set of two oppositely arranged edge magnetic structures 23. In this embodiment, there are four edge magnetic structures 23, and the central magnetic structure 22 is approximately rectangular. The four sides of the central magnetic structure 22 are respectively provided with the edge magnetic structures 23.

[0040] To improve magnetic force utilization, the edge washer 232 is preferably positioned corresponding to the first center washer 222; the bottom surface of the enclosure 242 is lower than or flush with the top surface of the second center washer 224. To ensure sufficient amplitude for the vibration component 3 to guarantee the acoustic performance of the miniature loudspeaker, the bottom surface of the enclosure 242 is preferably higher than or flush with the bottom surface of the second center washer 224.

[0041] In this embodiment, the dimensions of the first voice coil 33 are the same as those of the second voice coil 34. In other embodiments, the dimensions of the first voice coil 33 and the second voice coil 34 may be different.

[0042] To share the load of the dome 32, extend the service life of the miniature speaker, and improve the polarization phenomenon of the miniature speaker, the miniature speaker also includes a support component 4. The support component 4 connects the frame 1 and the first voice coil 33. The support component 4 includes a centering support plate. In other embodiments, the support component 4 may also be a sub-diaphragm; or, the support component 4 may be a combination of a centering support plate and a sub-diaphragm.

[0043] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the contents of this utility model specification and drawings under the utility model concept, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A microspeaker, characterized by: The application relates to a loudspeaker, which comprises a yoke, a magnetic circuit assembly, a vibration assembly and a support assembly. The magnetic circuit assembly comprises a magnetic cover, a yoke, a center magnetic structure and an edge magnetic structure arranged on the yoke respectively, the edge magnetic structure is connected with the yoke, a first magnetic gap is formed between the edge magnetic structure and the center magnetic structure, the center magnetic structure comprises a first center magnetic steel, a first center dust shield, a second center magnetic steel, a second center dust shield and a third center magnetic steel which are sequentially stacked and connected from bottom to top, the magnetic cover comprises a top plate and a surrounding wall which is bent and extended downward from the edge of the top plate, a second magnetic gap is formed between the surrounding wall and the center magnetic structure. The vibration assembly comprises a diaphragm, a dome, a first voice coil and a second voice coil, the diaphragm comprises an inner folding ring part, a connecting part, an outer folding ring part and an outer fixed part which are sequentially connected from inside to outside, the outer fixed part is connected with the yoke, the inner edge of the inner folding ring part is connected with the surrounding wall, the dome is connected with the connecting part, the first voice coil is located at the first magnetic gap and connected with the bottom surface of the dome, and the second voice coil is located at the second magnetic gap and connected with the top surface of the dome. The diaphragm further comprises an inner fixed part in the shape of a ring frame, the outer edge of the inner fixed part is connected with the inner edge of the inner folding ring part, and the inner edge of the inner folding ring part is indirectly connected with the surrounding wall through the inner fixed part.

2. The micro speaker of claim 1, wherein: The inner fixed part is fixedly connected with the bottom surface and / or the outer wall surface of the surrounding wall.

3. The microspeaker of claim 2, wherein: The edge magnetic structure comprises an edge magnetic steel and an edge dust shield, the edge magnetic steel is connected with the yoke and the edge dust shield, and the edge magnetic structure as a whole is in the shape of a continuous ring frame; or the number of the edge magnetic structures is plural, and the center magnetic structure is located between at least one group of oppositely arranged two edge magnetic structures.

4. The microspeaker of claim 1, wherein: The edge dust shield is correspondingly arranged with the first center dust shield.

5. The microspeaker of claim 4, wherein: The bottom surface of the surrounding wall is arranged to be lower than or flush with the top surface of the second center dust shield.

6. The microspeaker of claim 1, wherein: The bottom surface of the surrounding wall is arranged to be higher than or flush with the bottom surface of the second center dust shield.

7. The microspeaker of claim 6, wherein: The inner folding ring part is outwardly convex in the direction away from the yoke, and the outer folding ring part is inwardly concave in the direction close to the yoke.

8. The microspeaker of claim 1, wherein: The size specification of the first voice coil is the same as or different from that of the second voice coil.

9. The microspeaker of claim 1, wherein: The support assembly is further arranged to connect the yoke with the first voice coil, and the support assembly comprises a centering support sheet and / or a secondary diaphragm.

10. The microspeaker of claim 1, wherein: ​

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