Micro-speaker

Abstract

The utility model discloses a micro loudspeaker, including magnetic circuit subassembly, inside voice coil, outside voice coil and vibration subassembly, magnetic circuit subassembly includes upper yoke, lower yoke and respectively be equipped with on the center magnetic structure of lower yoke, two intermediate magnetic structures and two edge magnetic structures, and the inside magnetic gap is formed between center magnetic structure and intermediate magnetic structure, two edge magnetic structures are oppositely arranged, and the outside magnetic gap is formed between intermediate magnetic structure and edge magnetic structure, inside voice coil is located in the inside magnetic gap, outside voice coil is located in the outside magnetic gap, vibration subassembly includes skeleton and the diaphragm subassembly of ring frame shape, and the diaphragm subassembly includes the inside fixed part, inside folding ring part, transition part, outside folding ring part and outside fixed part that are sequentially connected from inside to outside, and the inside fixed part is connected upper yoke, and the skeleton includes the outside connecting portion, step portion and inside connecting portion that are sequentially connected, and the inside connecting portion connects inside voice coil with outside voice coil, and the outside connecting portion connects transition part.

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. With the rapid development of these portable electronic devices, the requirements for the miniature speakers used in them are also increasing.

[0003] As electronic products on the market become thinner and thinner, miniature speakers are required to achieve high performance while being ultra-thin. However, existing miniature speakers are difficult to meet this requirement. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a lightweight, thin, high-performance miniature speaker.

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

[0006] A magnetic circuit assembly includes an upper yoke, a lower yoke, and a central magnetic structure, two intermediate magnetic structures, and two side magnetic structures respectively disposed on the lower yoke. The upper yoke covers the central magnetic structure, intermediate magnetic structures, and side magnetic structures. The central magnetic structure is located between the two opposing intermediate magnetic structures, forming an inner magnetic gap between the central magnetic structure and the intermediate magnetic structures. The two side magnetic structures are oppositely disposed, with the central magnetic structure and intermediate magnetic structures both located between the two side magnetic structures. The outer magnetic gaps are formed between the edge magnetic structures; the central magnetic structure includes a lower central magnet, a central washer, and an upper central magnet connected sequentially from bottom to top, with the lower central magnet and the upper central magnet having opposite magnetic pole orientations; the intermediate magnetic structure includes a lower intermediate magnet, a central washer, and an upper intermediate magnet connected sequentially from bottom to top, with the lower intermediate magnet and the upper intermediate magnet having opposite magnetic pole orientations; the edge magnetic structure includes a lower edge magnet, an edge washer, and an upper edge magnet connected sequentially from bottom to top, with the lower edge magnet and the upper edge magnet having opposite magnetic pole orientations.

[0007] An inner voice coil is disposed in the inner magnetic gap;

[0008] An outer voice coil is disposed in the outer magnetic gap;

[0009] A vibration assembly includes a frame and a ring-shaped diaphragm assembly. The diaphragm assembly includes an inner fixed part, an inner folded ring part, a transition part, an outer folded ring part, and an outer fixed part connected sequentially from the inside to the outside. The inner fixed part is connected to the upper yoke. The frame includes an outer connecting part, a stepped part, and an inner connecting part connected sequentially. The inner connecting part connects the inner voice coil and the outer voice coil, and the outer connecting part connects to the transition part.

[0010] In one embodiment, the miniature speaker has a mirror-symmetric structure.

[0011] In one embodiment, the inner connecting portion connects the top surface of the inner voice coil and the top surface of the outer voice coil.

[0012] In one embodiment, the inner connecting portion is T-shaped or I-shaped.

[0013] In one embodiment, the device further includes a centering support and a frame. The centering support includes an inner mounting portion, a cantilever portion, and an outer mounting portion connected in sequence. The inner mounting portion connects the inner voice coil and the outer voice coil, and the frame connects the outer fixing portion and the outer mounting portion.

[0014] In one embodiment, the inner mounting portion connects the bottom surface of the inner voice coil and the bottom surface of the outer voice coil, and the inner mounting portion is T-shaped or I-shaped.

[0015] In one embodiment, the top outer edge of the edge magnetic structure is provided with a clearance area, which is used to avoid the inner folded ring portion.

[0016] In one embodiment, the intermediate magnetic structure is generally U-shaped, and a portion of the inner connecting portion is located in the end gap between two opposing intermediate magnetic structures.

[0017] In one embodiment, an annular frame is further included, and the inner fixing part is clamped between the annular frame and the upper yoke.

[0018] In one embodiment, the annular frame is fixedly connected to the upper part of the side magnetic structure.

[0019] The beneficial effects of this utility model are as follows: This miniature speaker has a novel structure that ensures high-performance output while maintaining an ultra-thin design. On the one hand, by coaxially arranging the central magnetic structure, intermediate magnetic structure, and edge magnetic structure on the lower yoke, and integrally covering it with the upper yoke, the magnetic circuit assembly is compressed to the extreme in the thickness direction, while forming an inner and outer double-layer magnetic gap. The magnetic flux density is doubled, thereby significantly improving the driving force without increasing the height. On the other hand, the inner and outer voice coils are placed in the inner and outer magnetic gaps, respectively, forming a dual voice coil drive, which makes the diaphragm assembly more uniformly stressed and has a larger stroke, significantly improving distortion and low-frequency response. In addition, the central magnetic structure, intermediate magnetic structure, and edge magnetic structure all adopt a three-segment anti-polarity laminate of "lower magnet-washer-upper magnet", which makes the magnetic circuit more complete, reduces magnetic leakage, and improves sensitivity. Ultimately, the speaker can maintain high sensitivity, low distortion, and wide bandwidth performance in a thinner overall space, meeting the market's dual demand for lightweight and high-performance portable electronic devices. Attached Figure Description

[0020] 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.

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

[0022] Figure 2 A cross-sectional view of the miniature loudspeaker according to Embodiment 1 of this utility model. Figure 1 ;

[0023] Figure 3 A cross-sectional view of the miniature loudspeaker according to Embodiment 1 of this utility model. Figure 2 ;

[0024] Figure 4 This is a schematic diagram of the partial structure of the miniature loudspeaker according to Embodiment 1 of this utility model. Figure 1 ;

[0025] Figure 5 This is a schematic diagram of the partial structure of the miniature loudspeaker according to Embodiment 1 of this utility model. Figure 2 ;

[0026] Figure 6 This is a schematic diagram of the partial structure of the miniature loudspeaker according to Embodiment 1 of this utility model. Figure 3 .

[0027] Explanation of icon numbers:

[0028] 1. Pot stand;

[0029] 2. Magnetic circuit assembly; 21. Upper yoke; 22. Lower yoke; 23. Central magnetic structure; 231. Lower central magnet; 232. Central washer; 233. Upper central magnet; 24. Intermediate magnetic structure; 241. Lower intermediate magnet; 242. Intermediate washer; 243. Upper intermediate magnet; 25. Side magnetic structure; 251. Lower side magnet; 252. Side washer; 253. Upper side magnet; 254. Clearance zone;

[0030] 3. Skeleton; 31. External connecting part; 32. Stepped part; 33. Internal connecting part;

[0031] 4. Diaphragm assembly; 41. Inner fixing part; 42. Inner folding ring part; 43. Transition part; 44. Outer folding ring part; 45. Outer fixing part; 46. Inner diaphragm; 47. Reinforcing ring frame; 48. Outer diaphragm;

[0032] 5. Centering support; 51. Internal mounting part; 52. Cantilever part; 53. External mounting part;

[0033] 61. Inner voice coil; 62. Outer voice coil;

[0034] 7. Circular frame. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Furthermore, if the meaning of "and / or" in the entire text is to include three parallel solutions, taking "and A / or B" as an example, it includes solution A, solution B, and a solution that simultaneously satisfies both A and B. 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.

[0040] 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.

[0041] Example 1

[0042] Please refer to Figures 1 to 6The first embodiment of this utility model is a miniature loudspeaker, including a frame 1, a magnetic circuit assembly 2, an inner voice coil 61, an outer voice coil 62, a centering support 5, and a vibration assembly. The magnetic circuit assembly 2 includes an upper yoke 21, a lower yoke 22, and a central magnetic structure 23, two intermediate magnetic structures 24, and two side magnetic structures 25 respectively disposed on the lower yoke 22. The lower yoke 22 is connected to the frame 1. The upper yoke 21 covers the central magnetic structure 23, the intermediate magnetic structures 24, and the side magnetic structures 25. The central magnetic structure 23 is located between the two opposing intermediate magnetic structures 24, forming an inner magnetic gap between the central magnetic structure 23 and the intermediate magnetic structures 24. The inner voice coil 61 is disposed in the inner magnetic gap. The two side magnetic structures 25 are arranged opposite each other. The central magnetic structure 23 and the intermediate magnetic structures 24 are both located between the two side magnetic structures 25. The intermediate magnetic structures 24 and the side magnetic structures 25 form an inner magnetic gap. An outer magnetic gap is formed between the magnetic structures 25, and the outer voice coil 62 is disposed in the outer magnetic gap; the central magnetic structure 23 includes a lower central magnet 231, a central washer 232, and an upper central magnet 233 connected sequentially from bottom to top, with the magnetic poles of the lower central magnet 231 and the upper central magnet 233 facing opposite directions; the intermediate magnetic structure 24 includes a lower intermediate magnet 241, an intermediate washer 242, and an upper intermediate magnet 243 connected sequentially from bottom to top. The lower intermediate magnet 241 and the upper intermediate magnet 243 have opposite magnetic pole orientations; the side magnetic structure 25 includes a lower side magnet 251, a side washer 252 and an upper side magnet 253 connected sequentially from bottom to top, with the lower side magnet 251 and the upper magnet 253 having opposite magnetic pole orientations; the upper center magnet 233 and the upper intermediate magnet 243 have opposite magnetic pole orientations, and the upper intermediate magnet 243 and the adjacent upper side magnet 253 have opposite magnetic pole orientations;

[0043] The vibrating assembly includes a frame 3 and a ring-shaped diaphragm assembly 4. The diaphragm assembly 4 includes an inner fixing part 41, an inner folded ring part 42, a transition part 43, an outer folded ring part 44, and an outer fixing part 45 connected sequentially from the inside to the outside. The outer fixing part 45 is connected to the frame 1, and the inner fixing part 41 is connected to the upper yoke 21. The frame 3 includes an outer connecting part 31, a stepped part 32, and an inner connecting part 33 connected sequentially. The inner connecting part 33 connects the inner voice coil 61 and the outer voice coil 62, and the outer connecting part 31 connects to the transition part 43.

[0044] The centering support 5 includes an inner mounting portion 51, a cantilever portion 52, and an outer mounting portion 53 connected in sequence. The inner mounting portion 51 connects the inner voice coil 61 and the outer voice coil 62, and the frame 1 connects to the outer mounting portion 53. In one or more embodiments, an external power supply powers the inner voice coil 61 and / or the outer voice coil 62 through the centering support 5. More specifically, the inner mounting portion 51 connects the bottom surface of the inner voice coil 61 and the bottom surface of the outer voice coil 62, and preferably the inner mounting portion 51 is T-shaped or I-shaped.

[0045] To ensure that the diaphragm assembly 4 is subjected to balanced forces and to improve the polarization phenomenon of the diaphragm assembly 4, in one or more embodiments, the miniature loudspeaker has a mirror-symmetric structure.

[0046] Specifically, the inner connecting part 33 connects the top surface of the inner voice coil 61 and the top surface of the outer voice coil 62. In this embodiment, the inner connecting part 33 is T-shaped or I-shaped.

[0047] The inner connecting part 33 and the inner mounting part 51 are respectively connected to the top and bottom surfaces of the inner voice coil 61 and the outer voice coil 62, so that the bonding area between the inner connecting part 33 and the inner voice coil 61 / outer voice coil 62 and the bonding area between the inner mounting part 51 and the inner voice coil 61 / outer voice coil 62 are set to be larger, thereby improving the structural stability of the miniature loudspeaker.

[0048] To increase the volume of the magnetic circuit assembly 2 and thus improve the performance of the miniature speaker, the intermediate magnetic structure 24 in this embodiment is generally U-shaped, and a portion of the inner connecting portion 33 is located in the end gap between two opposing intermediate magnetic structures 24. Similarly, a portion of the inner mounting portion 51 is located in the end gap between two opposing intermediate magnetic structures 24.

[0049] The outer top edge of the side magnetic structure 25 is provided with a clearance area 254, which is used to avoid the inner folded ring portion 42, thereby preventing the inner folded ring portion 42 from colliding with the side magnetic structure 25 and generating noise when the miniature speaker is working. At the same time, it also helps to extend the service life of the diaphragm assembly 4.

[0050] In one or more embodiments, the diaphragm assembly 4 includes an inner diaphragm 46, a reinforcing ring 47, and an outer diaphragm 48 arranged sequentially from the inside to the outside. The inner fixing part 41 and the inner folding ring part 42 are respectively disposed on the inner diaphragm 46, and the outer fixing part 45 and the outer folding ring part 44 are respectively disposed on the outer diaphragm 48. The reinforcing ring 47 connects the inner diaphragm 46 and the outer diaphragm 48 to form the transition part 43. The reinforcing ring 47 can improve the rigidity of the diaphragm assembly 4, thereby allowing it to stably suspend the inner voice coil 61 / outer voice coil 62.

[0051] The miniature speaker also includes an annular frame 7, with the inner fixing part 41 sandwiched between the annular frame 7 and the upper yoke 21, thus allowing the inner fixing part 41 to be more effectively sealed and fixed. Optionally, the annular frame 7 is fixedly connected to the upper part of the side magnetic structure 25; specifically, the upper side magnet 253 is fixedly connected to the annular frame 7.

[0052] 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 inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A miniature loudspeaker, characterized in that: include A magnetic circuit assembly includes an upper yoke, a lower yoke, and a central magnetic structure, two intermediate magnetic structures, and two side magnetic structures respectively disposed on the lower yoke. The upper yoke covers the central magnetic structure, intermediate magnetic structures, and side magnetic structures. The central magnetic structure is located between the two opposing intermediate magnetic structures, forming an inner magnetic gap between the central magnetic structure and the intermediate magnetic structures. The two side magnetic structures are oppositely disposed, with the central magnetic structure and intermediate magnetic structures both located between the two side magnetic structures. The outer magnetic gaps are formed between the edge magnetic structures; the central magnetic structure includes a lower central magnet, a central washer, and an upper central magnet connected sequentially from bottom to top, with the lower central magnet and the upper central magnet having opposite magnetic pole orientations; the intermediate magnetic structure includes a lower intermediate magnet, a central washer, and an upper intermediate magnet connected sequentially from bottom to top, with the lower intermediate magnet and the upper intermediate magnet having opposite magnetic pole orientations; the edge magnetic structure includes a lower edge magnet, an edge washer, and an upper edge magnet connected sequentially from bottom to top, with the lower edge magnet and the upper edge magnet having opposite magnetic pole orientations. An inner voice coil is disposed in the inner magnetic gap; An outer voice coil is disposed in the outer magnetic gap; A vibration assembly includes a frame and a ring-shaped diaphragm assembly. The diaphragm assembly includes an inner fixed part, an inner folded ring part, a transition part, an outer folded ring part, and an outer fixed part connected sequentially from the inside to the outside. The inner fixed part is connected to the upper yoke. The frame includes an outer connecting part, a stepped part, and an inner connecting part connected sequentially. The inner connecting part connects the inner voice coil and the outer voice coil, and the outer connecting part connects to the transition part.

2. The miniature loudspeaker according to claim 1, characterized in that: The miniature loudspeaker has a mirror-symmetric structure.

3. The miniature loudspeaker according to claim 1, characterized in that: The inner connecting part connects the top surface of the inner voice coil and the top surface of the outer voice coil.

4. The miniature loudspeaker according to claim 3, characterized in that: The internal connecting part is T-shaped or I-shaped.

5. The miniature loudspeaker according to claim 1, characterized in that: It also includes a centering support and a frame. The centering support includes an inner mounting part, a cantilever part and an outer mounting part connected in sequence. The inner mounting part connects the inner voice coil and the outer voice coil. The frame is connected to the outer fixing part and the outer mounting part respectively.

6. The miniature loudspeaker according to claim 5, characterized in that: The inner mounting part connects the bottom surface of the inner voice coil and the bottom surface of the outer voice coil, and the inner mounting part is T-shaped or I-shaped.

7. The miniature loudspeaker according to claim 1, characterized in that: The top outer edge of the edge magnetic structure is provided with a clearance area, which is used to avoid the inner folded ring portion.

8. The miniature loudspeaker according to claim 1, characterized in that: The intermediate magnetic structure is generally U-shaped, and a portion of the inner connecting part is located in the end gap between two opposing intermediate magnetic structures.

9. The miniature loudspeaker according to claim 1, characterized in that: It also includes an annular frame, with the inner fixing part sandwiched between the annular frame and the upper yoke.

10. The miniature loudspeaker according to claim 9, characterized in that: The annular frame is fixedly connected to the upper part of the side magnetic structure.

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