CN219876090U - Miniature loudspeaker - Google Patents

Abstract

The utility model discloses a miniature loudspeaker, which comprises a magnetic circuit assembly and two concave voice coils, wherein the magnetic circuit assembly comprises a yoke, a central magnetic structure and an annular magnetic structure, wherein the central magnetic structure and the annular magnetic structure are respectively arranged on the yoke, and the central magnetic structure is positioned in the annular magnetic structure; the central magnetic structure comprises two central magnetic steels and two central washer, the two central magnetic steels are in one-to-one correspondence with the two concave voice coils, the central magnetic steels and the central washer are respectively in concave shape, the two central magnetic steels are in mirror symmetry, a window is arranged on the yoke, the window is positioned between the two central magnetic steels, the edge of the window is provided with a magnetic conduction flanging, a gap for the movement of a part of the concave voice coil is formed between the magnetic conduction flanging and the central magnetic steel, and the central magnetic steel is connected with the central washer and the yoke; the annular magnetic structure comprises an outer washer and annular magnetic steel, and the annular magnetic steel is connected with the outer washer and the yoke. The miniature loudspeaker has excellent performance.

Description

Miniature loudspeaker

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 to them are also increasing, and the speakers and receivers currently used are popularizing large-amplitude speakers or super-linear speakers.

With the development of society, the micro-speaker needs to improve higher performance in a limited space, and the performance of the traditional micro-speaker adopting the single-voice-coil architecture has been maximized, so as to further improve the performance of the micro-speaker, the micro-speaker adopting the double-voice-coil architecture is applied, but the dual-voice-coil micro-speaker cannot maximize BL due to the larger magnetic gap in the middle (the adjacent sides of the two voice coils need to be accommodated), that is, the performance of the micro-speaker adopting the double-voice-coil architecture still has room for further improvement.

Disclosure of Invention

The utility model mainly aims to provide a novel micro-speaker, and aims to solve the problem that the performance of the traditional micro-speaker with a double voice coil framework is poor.

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

two concave voice coils;

the magnetic circuit assembly comprises a yoke, a central magnetic structure and an annular magnetic structure, wherein the central magnetic structure and the annular magnetic structure are respectively arranged on the yoke, and the central magnetic structure is positioned in the annular magnetic structure;

the central magnetic structure comprises two central magnetic steels and two central washer, the two central magnetic steels are in one-to-one correspondence with the two concave voice coils, the central magnetic steels and the central washer are respectively in concave shape and are in mirror symmetry, a window is arranged on the yoke, the window is positioned between the two central magnetic steels, the edge of the window is provided with a magnetic conduction flanging, a gap for the movement of a part area of the concave voice coils is formed between the magnetic conduction flanging and the central magnetic steels, and the central magnetic steels are connected with the central washer and the yoke;

the annular magnetic structure comprises an outer washer and annular magnetic steel, and the annular magnetic steel is connected with the outer washer and the yoke.

In one embodiment, the annular magnetic steel is a continuous, complete annular structure.

In one embodiment, the outer washer is generally annular.

In an embodiment, the window is rectangular, and four sides of the window are all provided with the magnetic conduction flanging.

In one embodiment, the fenestration is located in the center of the yoke.

In an embodiment, the magnetic conduction flanging is a turnover structure formed by turnover of a partial area of the yoke.

In an embodiment, the edge of the top surface of the central washer is provided with an avoiding blank holder.

In one embodiment, the outer walls of the male regions of the two female voice coils are joined.

In one embodiment, the outer walls of the convex areas of the two concave voice coils are adhesively fixed.

In an embodiment, the loudspeaker further comprises a vibrating diaphragm assembly and a basin frame, wherein the basin frame is connected with the magnetic circuit assembly and the vibrating diaphragm assembly, and the concave voice coil is connected with the vibrating diaphragm assembly.

The utility model has the beneficial effects that: compared with the traditional rectangular voice coil, the micro-speaker adopts the concave voice coil to effectively increase the total length (L value) of the voice coil, meanwhile, the yoke sets a windowing corresponding to the concave position of the central magnetic structure and a magnetic conduction flanging is arranged at the edge of the windowing, and the magnetic conduction flanging can supplement the B value of the magnetic circuit assembly, so that the magnetic field utilization rate of the magnetic circuit assembly is improved.

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 an exploded view of a micro-speaker according to a first embodiment of the present utility model;

fig. 2 is a cross-sectional view of a micro speaker according to a first embodiment of the present utility model;

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

Reference numerals illustrate:

1. a basin stand;

2. a diaphragm assembly;

3. a concave voice coil;

4. a yoke; 41. windowing; 42. magnetic conduction flanging;

5. a central magnetic structure; 51. a center magnetic steel; 52. a central washer; 521. avoiding edge pressing;

6. a toroidal magnetic structure; 61. annular magnetic steel; 62. an exo-washer;

71. a slit; 72. a void;

8. centering support.

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 to 3, a first embodiment of the present utility model is as follows: a micro loudspeaker can be widely applied to electronic equipment such as mobile phones, notebook computers, hearing aids and the like.

The miniature loudspeaker comprises a basin frame 1, and a vibration assembly and a magnetic circuit assembly which are respectively arranged on the basin frame 1, wherein the vibration assembly comprises a vibrating diaphragm assembly 2 and two concave voice coils 3 arranged on the vibrating diaphragm assembly 2, the vibrating diaphragm assembly 2 is connected with the basin frame 1, the magnetic circuit assembly comprises a yoke 4, and a central magnetic structure 5 and an annular magnetic structure 6 which are respectively arranged on the yoke 4, and the central magnetic structure 5 is positioned in the annular magnetic structure 6;

the central magnetic structure 5 comprises two central magnetic steels 51 and two central washer 52, the two central magnetic steels 51 are in one-to-one correspondence with the two concave voice coils 3, the central magnetic steels 51 and the central washer 52 are respectively in concave shape, the two central magnetic steels 51 are in mirror symmetry, the polarities of the two central magnetic steels 51 are the same (namely the magnetic pole directions are the same), a window 41 is arranged on the yoke 4, the window 41 is positioned between the two central magnetic steels 51, a magnetic conduction flanging 42 is arranged at the edge of the window 41, a gap 71 for the part of the concave voice coils 3 to move is formed between the magnetic conduction flanging 42 and the central magnetic steels 51, and the central magnetic steels 51 are connected with the central washer 52 and the yoke 4; the annular magnetic structure 6 comprises an outer washer 62 and annular magnetic steel 61, and the annular magnetic steel 61 is connected with the outer washer 62 and the yoke 4.

Optionally, the magnetically permeable flange 42 is perpendicular to other regions of the yoke 4. Of course, an angle slightly smaller or slightly larger than 90 ° is also possible between the magnetically permeable flange 42 and the yoke 4.

For ease of production and assembly, the annular magnetic steel 61 is preferably a continuous, complete annular structure; the outer washer 62 is annular, and optionally, the outer washer 62 and the basin stand 1 are of an integral structure formed by insert injection molding.

A gap 72 communicating with the gap 71 is formed between the two center magnetic steels 51, and the two concave voice coils 3 have partial areas moving in the gap 72, and since the gap 71 only needs to be provided with single-side movement of the concave voice coils 3, and the gap 72 needs to be provided with single-side movement of the two concave voice coils 3, the width of the gap 71 can be set smaller than the width of the gap 72, thereby improving the effective magnetic field intensity of the magnetic circuit assembly.

In order to improve the working synchronism of the two concave voice coils 3, thereby improving the acoustic performance of the micro-speaker, the outer walls of the convex areas of the two concave voice coils 3 are optionally connected, in detail, the outer walls of the convex areas of the two concave voice coils 3 are bonded and fixed, the concrete mode of bonding and fixing can be bonding and fixing through glue or bonding and fixing through double-sided adhesive paper, and when the concave voice coils 3 are wound by enamelled wires, the outer walls of the convex areas of the two concave voice coils 3 can be bonding and fixing through self-adhesive layers on the surfaces of enamelled wires. In detail, when the two voice coils 3 are glued, the glued areas of the two voice coils 3 are located in the gap 72.

In order to further improve the acoustic performance of the micro-speaker, it is preferable that the depressed area of the center magnetic steel 51 is disposed corresponding to the center position of one long side thereof. In other embodiments, the recessed region of the center magnetic steel 51 may be slightly offset from the center position of the long side of the center magnetic steel 51. The setting can be specifically performed according to actual needs.

In order to avoid that the diaphragm assembly 2 collides with the central washer 52 in the working process, the connecting adhesive structure of the diaphragm assembly 2 and the concave voice coil 3, optionally, an avoiding blank 521 is provided at the edge of the top surface of the central washer 52.

Specifically, the magnetically conductive flange 42 is a folded structure formed by folding a partial region of the yoke 4. In this embodiment, the window 41 is rectangular, four sides of the window 41 are provided with the magnetic conduction flanges 42, and in other embodiments, the window 41 may be in other shapes, such as pentagons, etc. At the same time, it is not necessary that every region of the edge of the window 41 is in contact with the magnetically permeable flange 42, for example, it is also possible to provide the magnetically permeable flange 42 only on one set of opposite sides of the window 41.

In other embodiments, the magnetically permeable flange 42 and the yoke 4 may be separate structures, and in this case, the magnetically permeable flange 42 is connected and fixed to the yoke 4 by fastening, riveting, bonding, welding, fastening, or the like.

As a preferred embodiment, the window 41 is located at the center of the yoke 4, and the window 41 is located at the center of the yoke 4, so that the airflow distribution is reasonable when the micro-speaker works, and the polarization phenomenon of the diaphragm assembly 2 is improved.

In order to improve the rolling vibration and polarization phenomena of the concave voice coil 3, optionally, the vibration assembly further comprises a centering support piece 8, wherein the centering support piece 8 comprises an inner mounting part, a cantilever and an outer mounting part which are sequentially connected from inside to outside, the outer mounting part is connected with the vibrating diaphragm assembly 2 and the basin frame 1, the inner mounting part is connected with the vibrating diaphragm assembly 2 and the concave voice coil 3, that is, the concave voice coil 3 is indirectly connected with the vibrating diaphragm assembly 2 through the centering support piece 8.

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 (10)

1. A miniature loudspeaker, characterized by: comprising

Two concave voice coils;

the magnetic circuit assembly comprises a yoke, a central magnetic structure and an annular magnetic structure, wherein the central magnetic structure and the annular magnetic structure are respectively arranged on the yoke, and the central magnetic structure is positioned in the annular magnetic structure;

the central magnetic structure comprises two central magnetic steels and two central washer, the two central magnetic steels are in one-to-one correspondence with the two concave voice coils, the central magnetic steels and the central washer are respectively in concave shape and are in mirror symmetry, a window is arranged on the yoke, the window is positioned between the two central magnetic steels, the edge of the window is provided with a magnetic conduction flanging, a gap for the movement of a part area of the concave voice coils is formed between the magnetic conduction flanging and the central magnetic steels, and the central magnetic steels are connected with the central washer and the yoke;

the annular magnetic structure comprises an outer washer and annular magnetic steel, and the annular magnetic steel is connected with the outer washer and the yoke.

2. A micro-speaker as claimed in claim 1, wherein: the annular magnetic steel is of a continuous and complete annular structure.

3. A micro-speaker as claimed in claim 1, wherein: the whole outer washer is annular.

4. A micro-speaker as claimed in claim 1, wherein: the window is rectangular, and four sides of the window are provided with the magnetic conduction flanging.

5. A micro-speaker as claimed in claim 1, wherein: the window is located at the center of the yoke.

6. A micro-speaker as claimed in claim 1, wherein: the magnetic conduction flanging is a turnover structure formed by turnover of a part of areas of the yoke.

7. A micro-speaker as claimed in claim 1, wherein: and the edge of the top surface of the central washer is provided with an avoidance blank holder.

8. A micro-speaker as claimed in claim 1, wherein: the outer walls of the convex areas of the two concave voice coils are connected.

9. A micro-speaker as claimed in claim 8, wherein: the outer walls of the convex areas of the two concave voice coils are adhered and fixed.

10. A micro-speaker as claimed in claim 1, wherein: still include vibrating diaphragm subassembly and basin frame, the basin frame is connected magnetic circuit subassembly with vibrating diaphragm subassembly, the spill voice coil loudspeaker voice coil is connected vibrating diaphragm subassembly.