Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a basin stand, a vibration assembly, a magnetic circuit assembly and two centering support chips, the vibration assembly comprises a diaphragm assembly, a framework and a voice coil, the diaphragm assembly is connected with the basin stand and the framework, the framework is connected with the voice coil, and two opposite sides of the framework are provided with lower convex parts which are oppositely arranged; the magnetic circuit assembly comprises a yoke, and a central magnetic structure and an edge magnetic structure which are respectively arranged on the yoke, a magnetic gap for the voice coil to move is formed between the edge magnetic structure and the central magnetic structure, the yoke is provided with a flange, and the flange is positioned on the outer side of the edge magnetic structure and is connected with the basin stand; the centering disk is located on the outer side of the edge magnetic structure and comprises an inner fixing part, a cantilever part and an outer fixing part which are connected in sequence, the outer fixing part is connected with the basin frame, the inner fixing part is connected with the lower protruding part, at least one centering disk further comprises a rising part and an attaching part, and the rising part is connected with the attaching part and the inner fixing part. The total volume of the edge magnetic structure can be set to be large, and the performance of the miniature loudspeaker can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic transducers, and particularly to a micro speaker. Background Art

[0002] As shown in the Chinese utility model patent with the application number 202220102826.9, in the existing micro speaker, centering supports for connecting the chassis are respectively provided at four corners of the voice coil. Although this improves the polarization and rolling vibration phenomena of the voice coil, the centering supports will occupy more space available for setting the edge magnetic structure, resulting in a large reduction in the overall volume of the edge magnetic structure, reducing the BL value of the micro speaker and leading to a less than satisfactory performance of the micro speaker. Summary of the Utility Model

[0003] The technical problem solved by the utility model is to provide a high-performance micro speaker.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is: a micro speaker, comprising:

[0005] A chassis;

[0006] A vibration assembly, the vibration assembly includes a diaphragm assembly, a skeleton and a voice coil, the diaphragm assembly is connected to the chassis and the skeleton, the skeleton is connected to the voice coil, and the opposite sides of the skeleton have downward convex parts arranged opposite to each other;

[0007] A magnetic circuit assembly, the magnetic circuit assembly includes a yoke and a central magnetic structure and an edge magnetic structure respectively arranged on the yoke, a magnetic gap for the voice coil to move is formed between the edge magnetic structure and the central magnetic structure, the yoke has a flanging, and the flanging is located outside the edge magnetic structure and is connected to the chassis;

[0008] Two centering supports, the centering supports are located outside the edge magnetic structure, the centering supports include an inner fixing part, a cantilever part and an outer fixing part connected in sequence, the outer fixing part is connected to the chassis, the inner fixing part is connected to the downward convex part, at least one of the centering supports further includes a rising part and a fitting part, the rising part is connected to the fitting part and the inner fixing part, at least part of the area of the fitting part is fixed on the diaphragm assembly, and one end of the fitting part away from the rising part is located in the central area of the diaphragm assembly and is electrically connected to the voice coil.

[0009] In one embodiment, the voice coil includes a body and a lead connected to each other, and one end of the lead away from the body is welded and conducted with the fitting part.

[0010] In one embodiment, the outer fixing part of the centering support welded to the lead has an exposed pad, and the exposed pad is conducted with the lead.

[0011] In one embodiment, a first avoidance groove for avoiding the connection part of the lead wire and the fitting part is provided on the top surface of the central magnetic structure.

[0012] In one embodiment, a second avoidance groove for avoiding the lead wire is provided on the top surface of the central magnetic structure.

[0013] In one embodiment, a second avoidance groove for avoiding the fitting part is provided on the top surface of the central magnetic structure.

[0014] In one embodiment, the whole framework is in a ring frame shape, a heightening part is provided on the inner edge of the framework, the heightening part is connected to the top of the voice coil, and the heightening part has a through groove for the fitting part to pass through.

[0015] In one embodiment, a part of the fitting part is fixed on the diaphragm assembly, and another part of the fitting part is fixed on the framework.

[0016] In one embodiment, the rising part and the lower convex part are adhesively fixed.

[0017] In one embodiment, the edge magnetic structure has an avoidance area for avoiding the inner fixing part.

[0018] The beneficial effects of the present utility model are as follows:

[0019] The structure of the present micro-speaker is novel. The centering washer is completely arranged outside the edge magnetic structure, so that the volume of the edge magnetic structure can be set larger, thereby enabling the BL value of the micro-speaker to be improved, and further improving the performance of the micro-speaker.

[0020] In addition, the voice coil realizes inner-side wiring conduction, which can not only shorten the lead wire and improve the phenomenon of lead wire breakage, but also enable the edge magnetic structure to not need to leave an avoidance space for the lead wire, so that a continuous and complete ring frame-shaped edge magnetic structure can be arranged in the micro-speaker, enabling the total volume of the edge magnetic structure to be further increased, and further improving the performance of the micro-speaker to a greater extent. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0022] Figure 1 It is a cross-sectional view of the micro-speaker according to Embodiment 1 of the present utility model;

[0023] Figure 2 It is a schematic structural diagram of the internal structure of the micro speaker according to the first embodiment of the present utility model;

[0024] Figure 3 It is a schematic structural diagram of a partial structure of the micro speaker according to the first embodiment of the present utility model.

[0025] Explanation of the reference numerals in the attached drawings:

[0026] 1. Basin frame;

[0027] 2. Vibration assembly; 21. Diaphragm assembly; 22. Skeleton; 221. Lower convex part; 222. Frame height part; 223. Through groove; 23. Voice coil; 231. Body; 232. Lead wire;

[0028] 3. Magnetic circuit assembly; 31. Yoke; 311. Flange; 32. Central magnetic structure; 321. First avoidance groove; 322. Second avoidance groove; 323. Third avoidance groove; 33. Edge magnetic structure; 331. Avoidance area;

[0029] 4. Centering support piece; 41. Outer fixing part; 42. Cantilever part; 43. Inner fixing part; 44. Rising part; 45. Fitting part. Detailed implementation manners

[0030] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the attached drawings.

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the attached drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0032] It should be noted that if there are directional indications such as up, down, left, right, front, back... in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture as shown in the attached drawings. If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0034] In addition, the meaning of "and / or" as it appears throughout the text is that it includes three parallel solutions. Taking "and / or" as an example, it includes the solution of "A", or the solution of "B", or the solution where both are satisfied simultaneously. Additionally, the technical solutions between various embodiments can be combined with each other, but it must be based on the premise that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions 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 required by this utility model.

[0035] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "linked", "fixed", 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. 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.

[0036] Embodiment 1

[0037] Please refer to Figures 1 to 3 , Embodiment 1 of this utility model is: A micro speaker, comprising a chassis 1, a vibration assembly 2, a magnetic circuit assembly 3, and two centering washers 4. The vibration assembly 2 includes a diaphragm assembly 21, a skeleton 22, and a voice coil 23. The diaphragm assembly 21 connects the chassis 1 and the skeleton 22, the skeleton 22 connects the voice coil 23, and the opposite sides of the skeleton 22 have downward convex portions 221 arranged oppositely. In this embodiment, the diaphragm assembly 21 includes a sound film and a dome. A window is provided in the central region of the sound film, and the dome is located within the window. The top surface of the skeleton 22 connects the dome and the sound film respectively, and the skeleton 22 closes the gap between the dome and the sound film; for convenience of processing, preferably, the downward convex portion 221 is a partial region of the skeleton 22, that is to say, the downward convex portion 221 and the skeleton 22 are an integrally formed one-piece structure processed integrally;

[0038] The magnetic circuit assembly 3 includes a yoke 31, a central magnetic structure 32 and a side magnetic structure 33 respectively arranged on the yoke 31. The central magnetic structure 32 is located between at least one set of two relatively arranged side magnetic structures 33. Preferably, the side magnetic structures 33 are respectively arranged corresponding to the four sides of the central magnetic structure 32; a magnetic gap for the voice coil 23 to move is formed between the side magnetic structure 33 and the central magnetic structure 32. The yoke 31 has a flange 311, and the flange 311 is located outside the side magnetic structure 33 and connects the chassis 1; it is easy to understand that the flange 311 is formed by bending a partial region of the yoke 31;

[0039] The centering support piece 4 is located outside the edge magnetic structure 33, and a partial area of the centering support piece 4 is located inside the flanging 311. The centering support piece 4 includes an inner fixing part 43, a cantilever part 42 and an outer fixing part 41 which are connected in sequence. The outer fixing part 41 is connected to the chassis 1, and the inner fixing part 43 is connected to the lower convex part 221. At least one centering support piece 4 further includes a rising part 44 and a fitting part 45. The rising part 44 connects the fitting part 45 and the inner fixing part 43. At least a partial area of the fitting part 45 is fixed on the diaphragm assembly 21. One end of the fitting part 45 away from the rising part 44 is located in the central area of the diaphragm assembly 21 and is electrically connected to the voice coil 23.

[0040] Specifically, the voice coil 23 includes a connected body 231 and a lead 232. One end of the lead 232 away from the body 231 is welded and conducted with the fitting part 45. The outer fixing part 41 of the centering support piece 4 welded to the lead 232 has an exposed pad, and a conducting line is provided on the centering support piece 4. The exposed pad is conducted with the lead 232 through the conducting line.

[0041] To ensure that the micro speaker has sufficient amplitude, a first avoidance groove 321 for avoiding the connection part of the lead 232 and the fitting part 45, a second avoidance groove 322 for avoiding the lead 232, and a third avoidance groove 323 for avoiding the fitting part 45 are provided on the top surface of the central magnetic structure 32.

[0042] In this embodiment, the skeleton 22 is integrally in a ring frame shape. A heightening part 222 is provided on the inner edge of the skeleton 22. The heightening part 222 is connected to the top of the voice coil 23. The heightening part 222 can make the voice coil 23 deeper into the magnetic gap, so that the magnetic field of the magnetic circuit assembly 3 can be more fully utilized, and further improve the performance of the micro speaker to a greater extent.

[0043] The heightening part 222 has a through groove 223 for the fitting part 45 to pass through. Preferably, a partial area of the fitting part 45 is fixed on the diaphragm assembly 21, and another partial area of the fitting part 45 is fixed on the skeleton 22. This can improve the suspension phenomenon of the fitting part 45 and is beneficial to ensuring the structural stability of the micro speaker.

[0044] Optionally, the rising part 44 and the lower convex part 221 are adhesively fixed, which can avoid the rising part 44 pulling the fitting part 45 so that the fitting part 45 is accidentally separated from the diaphragm assembly 21, and is beneficial to improving the structural stability of the micro speaker.

[0045] To reduce the overall volume of the micro-speaker and make it more miniaturized, optionally, the edge magnetic structure 33 has an avoidance area 331 for avoiding the inner fixing portion 43.

[0046] The central magnetic structure 32 includes a central magnet and a central spacer. The bottom surface of the central magnet is connected to the yoke 31, and the top surface of the central magnet is connected to the central spacer; the edge magnetic structure 33 includes an edge magnet and an edge spacer. The bottom surface of the edge magnet is connected to the yoke 31, and the top surface of the edge magnet is connected to the edge spacer. In an actual product, the edge magnet can be either a continuous and complete ring-shaped structure or a ring-shaped structure formed by enclosing four or more small magnets. At this time, there can be no gap or a narrow gap between adjacent small magnets.

[0047] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A micro speaker, characterized in that: including a chassis; a vibration assembly, the vibration assembly including a diaphragm assembly, a skeleton and a voice coil, the diaphragm assembly connecting the chassis and the skeleton, the skeleton connecting the voice coil, and opposite lower convex portions being provided on opposite sides of the skeleton; a magnetic circuit assembly, the magnetic circuit assembly including a yoke and a central magnetic structure and a side magnetic structure respectively provided on the yoke, a magnetic gap for the voice coil to move being formed between the side magnetic structure and the central magnetic structure, the yoke having a flanging which is located outside the side magnetic structure and connects the chassis; two centering support pieces, the centering support pieces being located outside the side magnetic structure, the centering support pieces including an inner fixing portion, a cantilever portion and an outer fixing portion which are connected in sequence, the outer fixing portion connecting the chassis, the inner fixing portion connecting the lower convex portion, at least one of the centering support pieces further including a rising portion and a fitting portion, the rising portion connecting the fitting portion and the inner fixing portion, at least a partial area of the fitting portion being fixed on the diaphragm assembly, and one end of the fitting portion away from the rising portion being located in the central area of the diaphragm assembly and being electrically connected to the voice coil.

2. The micro speaker according to claim 1, wherein: The voice coil includes a body and a lead connected to each other, and one end of the lead away from the body is welded and conducted with the fitting portion.

3. The micro speaker according to claim 2, wherein: The outer fixing portion of the centering support piece welded to the lead has an exposed pad, and the exposed pad is conducted with the lead.

4. The micro speaker according to claim 2, characterized in that: A first avoidance groove for avoiding the connection portion of the lead and the fitting portion is provided on the top surface of the central magnetic structure.

5. The micro speaker according to claim 2, characterized in that: A second avoidance groove for avoiding the lead is provided on the top surface of the central magnetic structure.

6. The micro speaker according to claim 2, characterized in that: A second avoidance groove for avoiding the fitting portion is provided on the top surface of the central magnetic structure.

7. The micro-speaker according to claim 1, characterized in that: The skeleton is integrally in a ring frame shape, a frame height portion is provided on the inner edge of the skeleton, the frame height portion connects the top of the voice coil, and a through groove for the fitting portion to pass through is provided on the frame height portion.

8. The micro-speaker according to claim 7, characterized in that: A partial area of the fitting portion is fixed on the diaphragm assembly, and another partial area of the fitting portion is fixed on the skeleton.

9. The micro speaker according to claim 1, characterized in that: The rising portion and the lower convex portion are adhesively fixed.

10. The micro speaker according to claim 1, characterized in that: The side magnetic structure has an avoidance area for avoiding the inner fixing portion.

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