CN219876087U

CN219876087U - Micro-speaker

Info

Publication number: CN219876087U
Application number: CN202320858769.1U
Authority: CN
Inventors: 张俊利; 农家权
Original assignee: Shenzhen Weishi Acoustics Co Ltd
Current assignee: Shenzhen Weishi Acoustics Co Ltd
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2023-10-20
Anticipated expiration: 2033-04-14

Abstract

The utility model discloses a micro loudspeaker, which comprises a framework, a magnetic circuit assembly and two concave voice coils, wherein the framework is arranged on the magnetic circuit assembly; the framework is respectively connected with two concave voice coils; the magnetic circuit assembly comprises a yoke, a central magnetic structure and two first side magnetic structures, wherein the central magnetic structure and the two first side magnetic structures are respectively arranged on the yoke, and the central magnetic structure is positioned between the two first side magnetic structures; the central magnetic structure comprises auxiliary magnetic steel, auxiliary washer, two central magnetic steel and two central washer, the two central magnetic steel and the two concave voice coils are in one-to-one correspondence, the central magnetic steel and the central washer are respectively concave-shaped, the two central magnetic steel are in mirror symmetry, the auxiliary magnetic steel is positioned between the two central magnetic steel, a gap for the partial area of the concave voice coil to move is formed between the auxiliary magnetic steel and the central magnetic steel, the central magnetic steel is connected with the central washer and the yoke, and the auxiliary magnetic steel is connected with the auxiliary washer and the yoke. The miniature loudspeaker has the advantages of excellent performance, stable structure and long service life.

Description

Micro-speaker

Technical Field

The utility model relates to the technical field of electroacoustic transducers, in particular to a miniature loudspeaker.

Background

The micro-speaker is widely applied to portable electronic devices such as mobile phones, notebook computers, hearing aids and the like. With the rapid development of these portable electronic devices, the requirements of micro electroacoustic devices applied therein are also increasing, and the speakers and receivers used are becoming popular as large-amplitude speakers or super-linear speakers.

Along with the development of society, the miniature loudspeaker needs to promote higher performance in limited space, traditional miniature loudspeaker that adopts single voice coil framework has gradually not satisfied the demand, consequently, two voice coil miniature loudspeaker are consequently all the time, in the miniature loudspeaker of two voice coils, two voice coils are generally set up side by side, the middle part magnetic gap of its magnetic circuit subassembly needs to set up bigger in order to hold the adjacent side of two voice coils, but the magnetic gap increases and can lead to this place magnetic field weakening, influence miniature loudspeaker's BL value, if add the magnet steel directly between the adjacent side of two voice coils, can let two voice coils thoroughly separate again, cause two voice coils to appear vibrating asynchronous phenomenon easily, influence the performance appearance of the miniature loudspeaker of two voice coils, when serious, still can lead to vibrating diaphragm subassembly damage phenomenon, influence user's use experience.

Disclosure of Invention

The utility model solves the technical problems that: a high performance micro-speaker with a long service life is provided.

In order to solve the technical problems, the utility model adopts the following technical scheme: a micro-speaker, comprising:

two concave voice coils;

the frameworks are respectively connected with the two concave voice coils;

the magnetic circuit assembly comprises a yoke, a central magnetic structure and two first side magnetic structures, wherein the central magnetic structure and the two first side magnetic structures are respectively arranged on the yoke, and the central magnetic structure is positioned between the two first side magnetic structures;

the center magnetic structure comprises auxiliary magnetic steel, auxiliary washer, two center magnetic steel and two center washer, wherein the two center magnetic steel corresponds to the two concave voice coils one by one, the center magnetic steel and the center washer are respectively in concave shape, the two center magnetic steel are in mirror symmetry, the auxiliary magnetic steel is located between the two center magnetic steel, a gap for the movement of a part area of the concave voice coil is formed between the auxiliary magnetic steel and the center magnetic steel, the center magnetic steel is connected with the center washer and the yoke, and the auxiliary magnetic steel is connected with the auxiliary washer and the yoke.

In one embodiment, the connection of the armature and the voice coil is located at a bulge of the voice coil.

In one embodiment, the skeleton is connected to an outer wall surface of the convex portion of the concave voice coil.

In one embodiment, the bottom surface of the frame is not lower than the bottom surface of the concave voice coil.

In one embodiment, the top surface of the concave voice coil is connected to the armature.

In one embodiment, the bottom surface of the concave voice coil is connected to the frame.

In an embodiment, the skeleton includes two recess portions and two connecting portions, two recess portions mirror symmetry, two recess portions with two voice coil loudspeaker voice coil one-to-one, connecting portion connect respectively two recess portions, two connecting portions keep away from each other.

In one embodiment, the connecting part is provided with a weight reducing groove.

In an embodiment, still include basin frame, vibrating diaphragm subassembly and centering piece, the magnetic circuit subassembly reaches vibrating diaphragm subassembly connects respectively the basin frame, centering piece includes interior installation department, cantilever and the outer installation department that links to each other in proper order from inside to outside, outer installation department is connected vibrating diaphragm subassembly with the basin frame, the top surface of interior installation department is connected vibrating diaphragm subassembly, the bottom surface of interior installation department is connected concave voice coil loudspeaker voice coil or skeleton.

In an embodiment, the auxiliary magnetic steel is in a cross column shape, a cylinder shape or a rectangular body shape.

The utility model has the beneficial effects that:

the center magnetic steel is arranged in the concave shape, the auxiliary magnetic steel is additionally arranged between the two voice coils, and a part area of the single side of the concave voice coil moves in a gap between the center magnetic steel and the auxiliary magnetic steel, so that the length of a wider magnetic gap between the two center magnetic steels is effectively shortened, the magnetic field intensity of the micro-speaker is enhanced, the BL value of the micro-speaker is improved, and the performance of the micro-speaker is improved.

The center magnetic steel is sunken to give off the installation position for the auxiliary magnetic steel, so that the whole volume of the micro-speaker can be ensured not to be increased or excessively increased due to the arrangement of the auxiliary magnetic steel, and the micro-speaker can still be kept miniaturized.

The framework for connecting the two concave voice coils is additionally arranged, so that the phenomenon that the two voice coils vibrate asynchronously due to insufficient bonding area between the two voice coils caused by additionally arranging the auxiliary magnetic steel can be improved, the problems of rolling vibration and polarization of the voice coils are greatly improved, and the performance of the miniature loudspeaker is guaranteed; meanwhile, the risk that the vibrating diaphragm assembly is easy to damage due to the fact that the two voice coils vibrate asynchronously is reduced, the service life of the micro-speaker is prolonged, and the use experience of a user is enhanced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an internal structure of a micro-speaker according to a first embodiment of the present utility model;

fig. 2 is a schematic structural diagram of an internal structure of a micro-speaker according to an embodiment of the present utility model at another view angle;

fig. 3 is a schematic structural diagram of an internal structure of a micro-speaker according to a second embodiment of the present utility model;

fig. 4 is a schematic structural diagram of an internal structure of a micro-speaker according to a second embodiment of the present utility model at another view angle;

fig. 5 is a schematic structural diagram of an internal structure of a micro-speaker according to a third embodiment of the present utility model;

fig. 6 is a schematic structural diagram of an internal structure of a micro-speaker according to a third embodiment of the present utility model at another view angle.

Reference numerals illustrate:

1. a basin stand;

2. a magnetic circuit assembly; 21. a center magnetic steel; 22. a central washer; 23. auxiliary magnetic steel; 24. auxiliary washer; 25. a first side magnetic structure; 26. a second side magnetic structure;

3. a skeleton; 31. a concave part; 32. a connection part; 33. a weight reduction groove;

4. a concave voice coil;

5. centering support pieces; 51. an inner mounting portion; 52. a cantilever; 53. an outer mounting portion.

Detailed Description

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the embodiment of the present utility model, directional indications such as up, down, left, right, front, and rear … … are referred to, and the directional indication is merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture such as that shown in the drawings, and if the specific posture is changed, the directional indication is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

In addition, if the meaning of "and/or" is presented throughout this document to include three parallel schemes, taking "and/or" as an example, including a scheme, or a scheme that is satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Example 1

Referring to fig. 1 and 2, a first embodiment of the utility model is as follows: the micro-speaker can be applied to electronic equipment such as mobile phones, notebook computers, hearing aids and the like.

The miniature loudspeaker comprises a framework 3, a basin frame 1, and a vibration component and a magnetic circuit component 2 which are respectively arranged on the basin frame 1; the vibrating assembly comprises a vibrating diaphragm assembly and two concave voice coils 4 arranged on the vibrating diaphragm assembly, the basin frame 1 is connected with the vibrating diaphragm assembly, the framework 3 is respectively connected with the two concave voice coils 4, and the vibrating diaphragm assembly comprises a sound membrane and a middle paste arranged on the sound membrane; the magnetic circuit assembly 2 comprises a yoke, a central magnetic structure and two first side magnetic structures 25, wherein the central magnetic structure and the two first side magnetic structures 25 are respectively arranged on the yoke, and the central magnetic structure is positioned between the two first side magnetic structures 25;

the center magnetic structure comprises an auxiliary magnetic steel 23, an auxiliary washer 24, two center magnetic steels 21 and two center washers 22, wherein the two center magnetic steels 21 are in one-to-one correspondence with the two concave voice coils 4, the center magnetic steels 21 and the center washers 22 are respectively in concave shape, the two center magnetic steels 21 are in mirror symmetry, the auxiliary magnetic steel 23 is positioned between the two center magnetic steels 21, a gap for the movement of a part area of the concave voice coils 4 is formed between the auxiliary magnetic steels 23 and the center magnetic steels 21, the center magnetic steels 21 are connected with the center washers 22 and the yoke, and the auxiliary magnetic steels 23 are connected with the auxiliary washers 24 and the yoke. Specifically, the auxiliary magnetic steel 23 is disposed corresponding to the recessed area of the center magnetic steel 21.

The polarities of the two central magnetic steels 21 are the same (i.e. the magnetic pole directions are the same), and the polarities of the central magnetic steel 21 and the auxiliary magnetic steel 23 are opposite.

Specifically, the auxiliary magnetic steel 23 is rectangular, and in other embodiments, the auxiliary magnetic steel 23 may be cross-shaped, cylindrical, or other shapes.

The bottom surface of the concave voice coil 4 is connected with the framework 3, namely the framework 3 is positioned below the concave voice coil 4. The frame 3 may be made of plastic or metal, or made of carbon fiber, and of course, the frame 3 may be made of wire.

In this embodiment, the skeleton 3 includes two concave portions 31 and two connecting portions 32, the two concave portions 31 are mirror symmetrical, the two concave portions 31 are in one-to-one correspondence with the two voice coils, the top surface of the concave portion 31 is fixedly connected with the bottom surface of the concave voice coil 4, the two concave portions 31 are respectively connected with the connecting portions 32, and the two connecting portions 32 are far away from each other. In this embodiment, the skeleton 3 has good structural stability, and has large bonding area with the two concave voice coils 4, and stable connection, which is beneficial to improving the structural reliability of the micro-speaker. In other embodiments, the framework 3 may be of other specific configurations.

In order to reduce the weight of the framework 3, in this embodiment, a weight reducing groove 33 is provided on the connecting portion 32.

Optionally, the micro-speaker further includes a centering support 5, where the centering support 5 includes an inner mounting portion 51, a cantilever 52, and an outer mounting portion 53 sequentially connected from inside to outside, the outer mounting portion 53 is connected to the diaphragm assembly and the basin frame 1, the top surface of the inner mounting portion 51 is connected to the diaphragm assembly, and the bottom surface of the inner mounting portion 51 is connected to the concave voice coil 4. The centering support piece 5 and the framework 3 are respectively positioned at the top and the bottom of the concave voice coil 4, so that the upper parts and the lower parts of the two concave voice coils 4 are mutually fixed, the fixing effect of the two concave voice coils 4 is effectively improved, the vibration synchronism of the two concave voice coils 4 can be ensured, and the risk of middle-paste damage is greatly reduced.

The first side magnetic structure 25 includes a first side magnetic steel and a first side washer, and the first side magnetic steel connects the first side washer and the yoke. In this embodiment, the first edge washer is fixedly connected to the basin stand 1.

To further increase the magnetic field strength of the micro-speaker, the magnetic circuit assembly 2 further includes two second side magnetic structures 26, the center magnetic structure is located between the two second side magnetic structures 26, and the first side magnetic structure 25 and the second side magnetic structure 26 are located on different sides of the center magnetic structure. Specifically, the second side magnetic structure 26 includes a second side magnetic steel and a second side Bian Huasi, and the second side magnetic steel connects the second Bian Huasi and the yoke.

For convenience in manufacturing, it is preferable that the first side washer and the second side washer are integrally formed as a one-piece structure. In some embodiments, it is also possible that the first side washer and the second side washer Bian Huasi are separate, split structures.

In other embodiments, the magnetic circuit assembly 2 further includes a flange, the flange is formed by folding a part of the area of the yoke, the number of the flanges is two, the central magnetic structure is located between the two flanges, and the first side magnetic structure 25 and the flange are located on different sides of the central magnetic structure. That is, the micro-speaker in this other embodiment uses the flange instead of the combination structure of the second side magnetic steel and the second Bian Huasi in this embodiment.

Example two

Referring to fig. 3 and 4, a second embodiment of the present utility model is as follows: the micro-speaker can be applied to electronic equipment such as mobile phones, notebook computers, hearing aids and the like.

Specifically, the auxiliary magnetic steel 23 has a cross-shaped column shape, and in other embodiments, the auxiliary magnetic steel 23 may have a rectangular body, a cylindrical shape, or other shapes.

The connection part of the framework 3 and the concave voice coil 4 is positioned at the protruding part of the concave voice coil 4. In detail, the bobbin 3 is connected to the outer wall surface of the protruding portion of the voice coil 4, that is, the bobbin 3 is located between the two voice coils 4. In this embodiment, the connection between the frame 3 and the voice coil 4 is near the bottom of the voice coil 4.

The frame 3 may be made of plastic or metal, or made of carbon fiber.

In order to avoid that the amplitude of the micro-speaker is affected by the addition of the frame 3, it is preferable that the bottom surface of the frame 3 is not lower than the bottom surface of the concave voice coil 4. In this embodiment, the two ends of the skeleton 3 are respectively provided with an arc contact surface, and the arc contact surface and the protruding portion of the concave voice coil 4 have a larger contact area, which is beneficial to improving the connection stability of the skeleton 3 and the concave voice coil 4.

In order to reduce the weight of the framework 3, the connecting portion 32 is optionally provided with a weight-reducing groove 33.

For further improving the structural reliability of the micro-speaker, the micro-speaker further comprises a centering support piece 5, wherein the centering support piece 5 comprises an inner mounting portion 51, a cantilever 52 and an outer mounting portion 53 which are sequentially connected from inside to outside, the outer mounting portion 53 is connected with the vibrating diaphragm assembly and the basin frame 1, the top surface of the inner mounting portion 51 is connected with the vibrating diaphragm assembly, and the bottom surface of the inner mounting portion 51 is connected with the concave voice coil 4. The centering support piece 5 and the framework 3 are respectively positioned at the top and the bottom of the concave voice coil 4, so that the upper parts and the lower parts of the two concave voice coils 4 are mutually fixed, the fixing effect of the two concave voice coils 4 is effectively improved, the vibration synchronism of the two concave voice coils 4 can be ensured, and the risk of middle-paste damage is greatly reduced.

Example III

Referring to fig. 5 and 6, a third embodiment of the present utility model is as follows: the micro-speaker can be applied to electronic equipment such as mobile phones, notebook computers, hearing aids and the like.

The top surface of the concave voice coil 4 is connected with the framework 3, namely the framework 3 is positioned above the concave voice coil 4. The frame 3 may be made of plastic or metal, or made of carbon fiber, and of course, the frame 3 may be made of wire.

In this embodiment, the skeleton 3 includes two concave portions and two connecting portions, two the mirror symmetry of concave portions, two the concave portions with two the voice coil is one-to-one, the bottom surface of concave portion with the top surface of concave voice coil 4 is connected fixedly, two are connected respectively to connecting portion concave portions, two connecting portions keep away from each other. In this embodiment, the skeleton 3 has good structural stability, and has large bonding area with the two concave voice coils 4, and stable connection, which is beneficial to improving the structural reliability of the micro-speaker. In other embodiments, the framework 3 may be of other specific configurations.

In order to reduce the weight of the framework 3, the connecting portion 32 is optionally provided with a weight-reducing groove. The specific construction of the skeleton 3 in this embodiment is the same as that of the skeleton in the first embodiment.

In this embodiment, the micro-speaker further includes a centering support 5, where the centering support 5 includes an inner mounting portion 51, a cantilever 52, and an outer mounting portion 53 sequentially connected from inside to outside, the outer mounting portion 53 connects the diaphragm assembly with the basin stand 1, the top surface of the inner mounting portion 51 is connected with the diaphragm assembly, and the bottom surface of the inner mounting portion 51 is connected with the frame 3. The additional arrangement of the centering support piece 5 can further improve the fixing effect of the two concave voice coils 4, further ensure the synchronism of the vibration of the two concave voice coils 4 and facilitate reducing the risk of the middle paste damage.

It should be noted that, although the above only exemplifies three embodiments, in practical application, at least two embodiments of the three embodiments may be combined to obtain a new implementation, that is, in the combined implementation, at least two of the top surface, the middle portion, and the bottom surface of the concave voice coil may be connected with different skeletons.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. Miniature speaker, its characterized in that: comprising

Two concave voice coils;

the frameworks are respectively connected with the two concave voice coils;

2. A micro-speaker as claimed in claim 1, wherein: the connection part of the framework and the concave voice coil is positioned at the protruding part of the concave voice coil.

3. A micro-speaker as claimed in claim 2, wherein: the framework is connected with the outer wall surface of the convex part of the concave voice coil.

4. A micro-speaker as claimed in claim 3, wherein: the bottom surface of skeleton is not lower than the bottom surface setting of spill voice coil loudspeaker voice coil.

5. A micro-speaker as claimed in claim 1, wherein: the top surface of the concave voice coil is connected with the framework.

6. A micro-speaker as claimed in claim 1, wherein: the bottom surface of the concave voice coil is connected with the framework.

7. A micro-speaker as claimed in claim 5 or 6, wherein: the skeleton includes two recess portions and two connecting portions, two recess portions mirror symmetry, two recess portions with two voice coil loudspeaker voice coil one-to-one, connecting portion connect respectively two recess portions, two connecting portion keep away from each other.

8. A micro-speaker as claimed in claim 7, wherein: the connecting part is provided with a weight reducing groove.

9. A micro-speaker as claimed in claim 1, wherein: still include basin frame, vibrating diaphragm subassembly and centering piece, the magnetic circuit subassembly reaches vibrating diaphragm subassembly connects respectively the basin frame, centering piece includes interior installation department, cantilever and the outer installation department that links to each other in proper order from inside to outside, outer installation department is connected vibrating diaphragm subassembly with the basin frame, the top surface of interior installation department is connected vibrating diaphragm subassembly, the bottom surface of interior installation department is connected concave voice coil loudspeaker voice coil or skeleton.

10. A micro-speaker as claimed in claim 1, wherein: the auxiliary magnetic steel is in a cross column shape, a cylinder shape or a rectangular shape.