Micro-speaker

Abstract

This utility model discloses a miniature loudspeaker, including a magnetic circuit assembly, a diaphragm assembly, a support frame, a skeleton, and two voice coils. The magnetic circuit assembly includes an upper yoke, a lower yoke, and a central magnetic structure and a side magnetic structure respectively disposed on the lower yoke. The upper yoke covers the central magnetic structure and the side magnetic structure, with the central magnetic structure located between the two oppositely disposed side magnetic structures. 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 ring-shaped, and its top surface is connected to the upper yoke. The support frame includes a ring-shaped part, the top surface of which is connected to the bottom surface of the inner fixing part, and the inner edge of the ring-shaped part is flush with or protrudes from the inner edge of the inner fixing part. The skeleton includes an inner mounting part, a connecting part, and an outer mounting part connected sequentially. The inner mounting part is connected to the top surface of the voice coils and is disposed corresponding to the hollow area of ​​the ring-shaped part. This miniature loudspeaker achieves high acoustic performance while being ultra-thin.

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, people have higher and higher requirements for the miniature speakers used in them. Meanwhile, portable electronic devices on the market are becoming thinner and lighter, especially mobile phones, which have begun to adopt foldable screen designs. This requires miniature speakers to still have good acoustic performance while being ultra-thin. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a miniature loudspeaker with excellent acoustic performance.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a miniature loudspeaker, comprising:

[0005] A magnetic circuit assembly, comprising an upper yoke, a lower yoke, and a central magnetic structure and a side magnetic structure respectively disposed on the lower yoke, wherein the upper yoke covers the central magnetic structure and the side magnetic structure, the central magnetic structure is located between two oppositely disposed side magnetic structures, and the number of the central magnetic structure is two.

[0006] Two voice coils, each corresponding one-to-one with the central magnetic structure;

[0007] A diaphragm assembly, comprising 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 to the outside; the inner fixing part is in the shape of a ring frame, and the top surface of the inner fixing part is connected to the upper yoke.

[0008] A support frame, the support frame including a ring frame portion, the top surface of the ring frame portion being connected to the bottom surface of the inner fixing portion, and the inner edge of the ring frame portion being flush with or protruding from the inner edge of the inner fixing portion;

[0009] The frame includes an inner mounting part, a connecting part, and an outer mounting part connected in sequence. The outer mounting part is connected to the transition part, and the inner mounting part is connected to the top surface of the voice coil and is set in the hollow area corresponding to the ring frame part.

[0010] In one embodiment, the upper yoke has a clearance groove for avoiding the inner mounting portion.

[0011] In one embodiment, 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 upper central magnet connected to the upper yoke; 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 upper side magnet indirectly connected to the upper yoke through the ring frame portion.

[0012] In one embodiment, the support frame further includes a folded edge portion, the outer edge of the ring frame portion is connected to the folded edge portion, and at least a portion of the folded edge portion is connected to the outer wall surface of the upper magnet.

[0013] In one embodiment, the inner folded ring portion and the outer folded ring portion have the same or different protrusion directions.

[0014] In one embodiment, the inner mounting portion simultaneously connects the two voice coils in areas where the two voice coils are close to each other.

[0015] In one embodiment, the two voice coils are connected to each other on their sides that are close to each other, or there is a gap between the two voice coils.

[0016] In one embodiment, a centering support is further included, the centering support comprising an outer support portion, a cantilever portion, and an inner support portion connected in sequence, the inner support portion being connected to the voice coil.

[0017] In one embodiment, the side magnetic structure is provided corresponding to the long side of the central magnetic structure, and the connecting portion is located outside the end of the central magnetic structure.

[0018] In one embodiment, the connecting portion is stepped.

[0019] The beneficial effects of this invention are as follows: The miniature loudspeaker has a novel structure, with a large overall volume of magnets in the magnetic circuit assembly, effectively increasing the magnetic field strength of the miniature loudspeaker and improving its performance. Furthermore, the staggered arrangement of the voice coil and diaphragm assembly effectively reduces the thickness space required for the miniature loudspeaker to operate, enabling its ultra-thin design. In addition, the sound-generating unit adopts a dual voice coil architecture, which effectively improves the magnetic utilization rate of the central magnetic structure, further enhancing the performance of the sound-generating unit. The hollow areas of the ring frame and the inner fixing part can accommodate the inner mounting part, ensuring that the voice coil can achieve a large amplitude. 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 A cross-sectional view of the miniature loudspeaker according to Embodiment 1 of this utility model. Figure 1 ;

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

[0023] Figure 3 This is a schematic diagram of the structure of the miniature speaker after the lower yoke is hidden in Embodiment 1 of this utility model.

[0024] Explanation of icon numbers:

[0025] 1. Pot stand;

[0026] 2. Magnetic circuit assembly; 21. Upper yoke; 211. Clearance groove; 22. Lower yoke; 23. Lower center magnet; 24. Center washer; 25. Upper center magnet; 26. Lower side magnet; 27. Side washer; 28. Upper side magnet;

[0027] 3. Diaphragm assembly; 31. Inner fixing part; 32. Inner folding ring part; 33. Transition part; 34. Outer folding ring part; 35. Outer fixing part;

[0028] 4. Support frame; 41. Ring frame; 42. Folded edge;

[0029] 5. Frame; 51. Internal mounting part; 52. Connecting part; 53. External mounting part;

[0030] 6. Voice coil;

[0031] 7. Centering support; 71. External support; 72. Cantilever; 73. Internal support. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Example 1

[0039] Please refer to Figures 1 to 3Embodiment 1 of this utility model is a miniature loudspeaker, comprising a frame 1, a magnetic circuit assembly 2, a diaphragm assembly 3, a support frame 4, a skeleton 5, and two voice coils 6. The magnetic circuit assembly 2 includes an upper yoke 21, a lower yoke 22, and a central magnetic structure and a side magnetic structure 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 and the side magnetic structure. The central magnetic structure is located between two oppositely disposed side magnetic structures. There are two central magnetic structures. The voice coils 6 correspond one-to-one with the central magnetic structures. The diaphragm assembly 3 includes an inner fixing part 31, an inner folding ring part 32, and a connecting part connected sequentially from the inside out. The frame includes a transition section 33, an outer folding ring section 34, and an outer fixing section 35. The outer fixing section 35 is connected to the frame 1. The inner fixing section 31 is in the shape of a ring frame, and the top surface of the inner fixing section 31 is connected to the upper yoke 21. The support frame 4 includes a ring frame section 41, the top surface of which is connected to the bottom surface of the inner fixing section 31. The inner edge of the ring frame section 41 is flush with or protrudes from the inner edge of the inner fixing section 31. The frame 5 includes an inner mounting section 51, a connecting section 52, and an outer mounting section 53 connected in sequence. The outer mounting section 53 is connected to the transition section 33. The inner mounting section 51 is connected to the top surface of the voice coil 6 and is set corresponding to the hollow area of ​​the ring frame section 41.

[0040] In order to enable the voice coil 6 to achieve a larger amplitude and thus improve the loudness of the miniature loudspeaker, the upper yoke 21 has a clearance groove 211 for avoiding the inner mounting part 51.

[0041] Specifically, the central magnetic structure includes a lower central magnet 23, a central washer 24, and an upper central magnet 25 connected sequentially from bottom to top, with the upper central magnet 25 connected to the upper yoke 21; the side magnetic structure includes a lower side magnet 26, a side washer 27, and an upper side magnet 28 connected sequentially from bottom to top, with the upper side magnet 28 indirectly connected to the upper yoke 21 through the ring frame portion 41.

[0042] To improve the structural strength of the support frame 4 and enhance the connection strength between the support frame 4 and the central magnetic structure, the support frame 4 further includes a folded edge portion 42. The outer edge of the ring frame portion 41 is connected to the folded edge portion 42. At least a portion of the folded edge portion 42 is connected to the outer wall surface of the upper magnet 28. In this embodiment, the folded edge portion 42 located outside the upper magnet 28 is bonded to the outer wall surface of the upper magnet 28.

[0043] The inner folded ring portion 32 and the outer folded ring portion 34 have different protrusion directions. In this embodiment, the inner folded ring portion 32 protrudes in a direction away from the lower yoke 22; in other embodiments, the inner folded ring portion 32 and the outer folded ring portion 34 have the same protrusion direction.

[0044] The inner mounting part 51 simultaneously connects the two voice coils 6 in the areas where they are close to each other; there is a gap between the two voice coils 6, but in this embodiment, the two voice coils 6 are connected to each other on the side where they are close to each other, specifically, the two voice coils 6 are bonded and fixed on the side where they are close to each other.

[0045] Optionally, the miniature loudspeaker also includes a centering support 7, which includes an outer support 71, a cantilever 72, and an inner support 73 connected in sequence. The outer support 71 is connected to the frame 1, and the inner support 73 is connected to the voice coil 6.

[0046] In some embodiments, the side magnetic structure is provided corresponding to the long side of the central magnetic structure, and the connecting portion 52 is located outside the end of the central magnetic structure.

[0047] In order to reduce the weight of the frame 5 and ensure the structural strength of the frame 5, in this embodiment, the connecting part 52 is stepped.

[0048] 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 miniature loudspeaker, characterized in that: include A magnetic circuit assembly, comprising an upper yoke, a lower yoke, and a central magnetic structure and a side magnetic structure respectively disposed on the lower yoke, wherein the upper yoke covers the central magnetic structure and the side magnetic structure, the central magnetic structure is located between two oppositely disposed side magnetic structures, and the number of the central magnetic structure is two. Two voice coils, each corresponding one-to-one with the central magnetic structure; A diaphragm assembly, comprising 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 to the outside; the inner fixing part is in the shape of a ring frame, and the top surface of the inner fixing part is connected to the upper yoke. A support frame, the support frame including a ring frame portion, the top surface of the ring frame portion being connected to the bottom surface of the inner fixing portion, and the inner edge of the ring frame portion being flush with or protruding from the inner edge of the inner fixing portion; The frame includes an inner mounting part, a connecting part, and an outer mounting part connected in sequence. The outer mounting part is connected to the transition part, and the inner mounting part is connected to the top surface of the voice coil and is set in the hollow area corresponding to the ring frame part.

2. The miniature loudspeaker according to claim 1, characterized in that: The upper yoke has a clearance groove for avoiding the inner mounting part.

3. The miniature loudspeaker according to claim 1, characterized in that: 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 upper central magnet connected to the upper yoke; 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 upper side magnet indirectly connected to the upper yoke through the ring frame portion.

4. The miniature loudspeaker according to claim 3, characterized in that: The support frame also includes a folded edge portion, the outer edge of the ring frame portion is connected to the folded edge portion, and at least a portion of the folded edge portion is connected to the outer wall surface of the upper magnet.

5. The miniature loudspeaker according to claim 1, characterized in that: The inner folded ring portion and the outer folded ring portion may have the same or different protrusion directions.

6. The miniature loudspeaker according to claim 1, characterized in that: The internal mounting portion connects the two voice coils simultaneously in the region where the two voice coils are close to each other.

7. The miniature loudspeaker according to claim 6, characterized in that: The two voice coils are connected to each other on their sides that are close to each other, or there is a gap between the two voice coils.

8. The miniature loudspeaker according to claim 6, characterized in that: It also includes a centering support, which comprises an outer support, a cantilever, and an inner support connected in sequence, with the inner support connected to the voice coil.

9. The miniature loudspeaker according to claim 1, characterized in that: The side magnetic structure is provided corresponding to the long side of the central magnetic structure, and the connecting part is located on the outside of the end of the central magnetic structure.

10. The miniature loudspeaker according to claim 1, characterized in that: The connecting part is stepped.

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