Miniature speaker

Abstract

This utility model discloses a miniature loudspeaker, including a magnetic circuit assembly, an outer voice coil, a vibrating assembly, and two inner voice coils. The magnetic circuit assembly includes an upper yoke, a lower yoke, and two central magnetic structures, two intermediate magnetic structures, and two edge magnetic structures respectively disposed on the lower yoke. The upper yoke covers the central magnetic structures, intermediate magnetic structures, and edge magnetic structures. The two central magnetic structures are arranged side-by-side between the two intermediate magnetic structures, forming an inner magnetic gap around the central magnetic structures. The two edge magnetic structures are arranged opposite each other, with the central and intermediate magnetic structures located between the two edge magnetic structures, forming an outer magnetic gap between the intermediate and edge magnetic structures. The vibrating assembly includes a frame and a ring-shaped diaphragm assembly. The diaphragm assembly includes an inner fixing part, an inner folded ring part, a transition part, an outer folded ring part, and an outer fixing part connected sequentially from the inside out. The inner fixing part is connected to the upper yoke. This miniature loudspeaker has the advantages of being lightweight, thin, and high-performance.

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 two central magnetic structures, two intermediate magnetic structures, and two side magnetic structures respectively disposed on the lower yoke. The upper yoke covers the central magnetic structures, intermediate magnetic structures, and side magnetic structures. The two central magnetic structures are arranged side-by-side between the two intermediate magnetic structures, with an inner magnetic gap formed around each central magnetic structure. The two side magnetic structures are arranged opposite each other, with both the central and intermediate magnetic structures located between the two side magnetic structures. The magnetic structures form an outer magnetic gap; 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 magnetic poles of the lower central magnet and the upper central magnet facing opposite directions; 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 magnetic poles of the lower intermediate magnet and the upper intermediate magnet facing opposite directions; the side magnetic structure includes a lower side magnet, a side washer, and an upper side magnet connected sequentially from bottom to top, with the magnetic poles of the lower side magnet and the upper side magnet facing opposite directions.

[0007] Two inner voice coils are 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 outer voice coil and the two inner voice coils. 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 outer voice coil and the top surfaces of the two inner voice coils.

[0012] In one embodiment, the inner connecting portion is in the shape of an I-beam or a T-beam.

[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 outer voice coil to two inner voice coils, 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 in the shape of an I-beam or a T-beam.

[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 loudspeaker has a novel structure. By constructing a magnetic circuit consisting of a central magnetic structure, an intermediate magnetic structure, and a side magnetic structure on the lower yoke, and placing an inner voice coil and an outer voice coil in the corresponding magnetic gaps, and then using an integrated frame to synchronously couple the transition part of the diaphragm assembly with the outer and inner voice coils, the magnetic flux is completely closed by the upper and lower yokes in the height direction, forming a parallel driving circuit. On the one hand, the "anti-magnetic pole" design of the upper and lower magnets in the magnetic structure greatly improves the magnetic force utilization rate, and the overall thickness is only... Limited by the height of the diaphragm surround, it can be directly adapted to ultra-thin terminals. On the other hand, the three voice coils share the same diaphragm assembly, which increases the effective radiation area and driving force of the diaphragm assembly at the same time. The diaphragm assembly adopts a ring frame structure with inner and outer double surrounds and transition sections integrally formed. This ensures linear recovery under large amplitude and rigidly connects the voice coil and diaphragm transition section through the skeleton step section, improving the split vibration. Thus, without increasing the overall height, it achieves a comprehensive performance improvement of high sensitivity, low distortion and high loudness, truly achieving both "lightness" and "high performance". 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 part of the structure of the miniature loudspeaker in Embodiment 1 of this utility model. Figure 1 ;

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

[0026] Figure 6 This is a schematic diagram of part of the structure of the miniature loudspeaker in 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 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 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 6Embodiment 1 of this utility model is a miniature loudspeaker, including a frame 1, a magnetic circuit assembly 2, a centering support 5, a vibration assembly, an outer voice coil 62, and two inner voice coils 61. The magnetic circuit assembly 2 includes an upper yoke 21, a lower yoke 22, and two central magnetic structures 23, two intermediate magnetic structures 24, and two edge magnetic structures 25 respectively disposed on the lower yoke 22. The upper yoke 21 covers the central magnetic structures 23, intermediate magnetic structures 24, and edge magnetic structures 25. The two central magnetic structures 23 are arranged side by side between the two intermediate magnetic structures 24, and an inner magnetic gap is formed around the central magnetic structures 23. The inner voice coils 61 are disposed in the inner magnetic gap, and the two inner voice coils 61 correspond one-to-one with the two central magnetic structures 23. The two edge magnetic structures 25 are arranged opposite each other, and the central magnetic structures 23 and intermediate magnetic structures 24 are respectively disposed on the side magnetic structures 25. All are located between the two side magnetic structures 25, and an outer magnetic gap is formed between the middle magnetic structure 24 and the side magnetic structure 25. 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 from bottom to top. The magnetic poles of the lower central magnet 231 and the upper central magnet 233 are opposite. The middle magnetic structure 24 includes a lower middle magnet 241, a middle washer 242 and an upper middle magnet 243 connected from bottom to top. The magnetic poles of the lower middle magnet 241 and the upper middle magnet 243 are opposite. The side magnetic structure 25 includes a lower side magnet 251, a side washer 252 and an upper side magnet 253 connected from bottom to top. The magnetic poles of the lower magnet 251 and the upper magnet 253 are opposite.

[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 outer voice coil 62 and the two inner voice coils 61, 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 outer voice coil 62 to the two inner voice coils 61, and the frame 1 is connected to the outer mounting portion 53. In one or more embodiments, an external power supply powers the inner voice coils 61 and / or the outer voice coils 62 through the centering support 5. Specifically, the inner mounting portion 51 connects the bottom surface of the outer voice coil 62 and the bottom surfaces of the two inner voice coils 61, 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 outer voice coil 62 and the top surfaces of the two inner voice coils 61. 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 microspeaker, characterized by: include A magnetic circuit assembly includes an upper yoke, a lower yoke, and two central magnetic structures, two intermediate magnetic structures, and two side magnetic structures respectively disposed on the lower yoke. The upper yoke covers the central magnetic structures, intermediate magnetic structures, and side magnetic structures. The two central magnetic structures are arranged side-by-side between the two intermediate magnetic structures, with an inner magnetic gap formed around each central magnetic structure. The two side magnetic structures are arranged opposite each other, with both the central and intermediate magnetic structures located between the two side magnetic structures. The magnetic structures form an outer magnetic gap; 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 magnetic poles of the lower central magnet and the upper central magnet facing opposite directions; 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 magnetic poles of the lower intermediate magnet and the upper intermediate magnet facing opposite directions; the side magnetic structure includes a lower side magnet, a side washer, and an upper side magnet connected sequentially from bottom to top, with the magnetic poles of the lower side magnet and the upper side magnet facing opposite directions. Two inner voice coils are 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 outer voice coil and the two inner voice coils. The outer connecting part connects to the transition part.

2. The microspeaker of claim 1, wherein: The miniature loudspeaker has a mirror-symmetric structure.

3. The micro speaker of claim 1, wherein: The inner connecting part connects the top surface of the outer voice coil and the top surfaces of the two inner voice coils.

4. The microspeaker of claim 3, wherein: The internal connecting part is in the shape of an I-beam or a T-beam.

5. The microspeaker of claim 1, wherein: 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 outer voice coil and the two inner voice coils. The frame is connected to the outer fixing part and the outer mounting part respectively.

6. The microspeaker of claim 5, wherein: 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 in the shape of an I-beam or a T-beam.

7. The microspeaker of claim 1, wherein: 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 microspeaker of claim 1, wherein: 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 microspeaker of claim 1, wherein: It also includes an annular frame, with the inner fixing part sandwiched between the annular frame and the upper yoke.

10. The microspeaker of claim 9, wherein: The annular frame is fixedly connected to the upper part of the side magnetic structure.

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