CN219999590U

CN219999590U - Miniature loudspeaker

Info

Publication number: CN219999590U
Application number: CN202320927037.3U
Authority: CN
Inventors: 张俊利; 张文华
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: 2023-11-10
Anticipated expiration: 2033-04-14

Abstract

The utility model discloses a miniature loudspeaker, which comprises a yoke, a central magnetic assembly, a voice coil and a plurality of side magnetic assemblies, wherein the side magnetic assemblies and the central magnetic assembly are respectively arranged on the yoke; the central magnetic assembly is positioned between at least one group of two side magnetic assemblies which are oppositely arranged, and the voice coil is provided with at least one concave part; the central magnetic assembly is provided with a avoiding part which is arranged corresponding to the concave part; the side magnetic assembly corresponding to the recess has an extension that extends into the recess. The miniature loudspeaker has a simple and novel structure, and can effectively improve the effective length of the voice coil in the magnetic circuit system under the condition that the volume of the miniature loudspeaker is not increased, so that the BL value of the miniature loudspeaker product is improved, the sensitivity of the miniature loudspeaker product is improved, and the effects of improving the performance of the miniature loudspeaker and improving the experience of consumers are achieved.

Description

Miniature loudspeaker

Technical Field

The utility model relates to the technical field of electroacoustic converters, 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 people on the miniature electroacoustic devices applied to them are also higher and higher, the amplitude of the loudspeaker/receiver is gradually increased from 0.2mm to more than 0.25mm, 0.3mm and 0.4mm, and the miniature loudspeaker and receiver with ultra-large amplitude of 0.65mm are currently realizing mass production.

In the prior art, the voice coil in the micro-speaker is often rectangular frame-shaped, and how to improve the performance of the micro-speaker product in the limited space of the micro-speaker is pursued by practitioners.

Disclosure of Invention

The technical problems solved by the utility model are as follows: a high performance micro-speaker is provided.

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

a yoke;

the side magnetic assemblies are arranged on the yoke iron;

the central magnetic assembly is arranged on the yoke iron and is positioned between at least one group of two side magnetic assemblies which are oppositely arranged;

the voice coil is provided with at least one concave part;

the central magnetic assembly is provided with a avoiding part which is arranged corresponding to the concave part;

the side magnetic assembly corresponding to the recess has an extension that extends into the recess.

In one embodiment, the number of the concave portions is a plurality.

In an embodiment, the number of the concave parts is an even number, and the concave parts with the even number are arranged in a one-to-one opposite way.

In one embodiment, at least a portion of the recess is disposed on a major axis of the voice coil.

In one embodiment, at least a portion of the recess is provided on a minor axis of the voice coil.

In one embodiment, at least a portion of the recess is located at a corner of the voice coil.

In one embodiment, the number of side magnetic assemblies is four.

In one embodiment, the central magnet assembly includes a central magnet steel and a central washer, the central magnet steel connecting the central washer and the yoke.

In an embodiment, the edge of the side of the central washer away from the central magnetic steel is provided with an avoidance blank holder.

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

The utility model has the beneficial effects that: the miniature loudspeaker has a simple and novel structure, and can effectively improve the effective length of the voice coil in the magnetic circuit system under the condition that the volume of the miniature loudspeaker is not increased, so that the BL value of the miniature loudspeaker product is improved, the sensitivity of the miniature loudspeaker product is improved, and the effects of improving the performance of the miniature loudspeaker and improving the experience of consumers are achieved.

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 another embodiment of the present utility model.

Reference numerals illustrate:

1. a basin stand;

2. a voice coil; 21. an inner concave portion;

3. a magnetic gap;

4. a central magnetic assembly; 41. a center magnetic steel; 42. a central washer; 421. avoiding edge pressing; 43. an avoidance unit;

5. a side magnetic assembly; 51. edge magnetic steel; 52. bian Huasi; 53. an extension;

6. a yoke.

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: a micro-speaker can be applied to electronic equipment such as mobile phones, notebook computers, hearing aids and the like.

The miniature loudspeaker comprises a basin frame 1, a magnetic circuit system, a vibrating diaphragm assembly and a voice coil 2, wherein the magnetic circuit system and the vibrating diaphragm assembly are respectively arranged on the basin frame 1, the voice coil 2 is connected with the vibrating diaphragm assembly, and the magnetic circuit system is provided with a magnetic gap 3 for the voice coil 2 to move.

In this embodiment, the micro-speaker further includes a centering support, and the voice coil 2 is indirectly connected to the diaphragm assembly through the centering support; in other embodiments, the micro-speaker may not have the centering support, and the voice coil 2 may be directly connected to the diaphragm assembly.

The magnetic circuit system comprises a yoke 6, a central magnetic assembly 4 and a plurality of side magnetic assemblies 5, wherein the central magnetic assembly 4 and the side magnetic assemblies 5 are respectively and fixedly arranged on the yoke 6, the central magnetic assembly 4 is positioned between at least one group of two side magnetic assemblies 5 which are oppositely arranged, and a magnetic gap 3 is formed between the central magnetic assembly 4 and the side magnetic assemblies 5.

In this embodiment, the number of the side magnetic assemblies 5 is four, and four side magnetic assemblies 5 are disposed around the center magnetic assembly 4. In other embodiments, the number of the side magnetic assemblies 5 may be two, at this time, the yoke 6 may be provided with a flange, where the flange is not provided with the side of the side magnetic assembly 5 corresponding to the center magnetic assembly 4, and the flange on the yoke 6 may play a role of magnetic conduction, so as to improve the magnetic field strength of the micro-speaker. In addition, in some embodiments, the number of the edge magnet assemblies 5 may be six, eight, or the like.

The central magnetic assembly 4 comprises a central magnetic steel 41 and a central washer 42, and the central magnetic steel 41 is connected with the central washer 42 and the yoke 6. Preferably, the edge of the side of the central washer 42 away from the central magnetic steel 41 is provided with an avoiding pressing edge 421.

The side magnetic assembly 5 is fixedly connected with the basin frame 1, the side magnetic assembly 5 comprises side magnetic steels 51 and Bian Huasi, the side magnetic steel 51 is connected with the Bian Huasi and the yoke 6, and the Bian Huasi is fixedly connected with the basin frame 1.

The voice coil 2 is provided with at least one concave portion 21, the center magnetic assembly 4 has a relief portion 43 provided corresponding to the concave portion 21, and the side magnetic assembly 5 corresponding to the concave portion 21 has an extension portion 53 extending into the concave portion 21. That is, the magnetic gap 3 is not a standard rectangular frame, and the central magnetic assembly 4 is matched with the concave-convex of the side magnetic assembly 5, so that the total length of the magnetic gap 3 is effectively prolonged, and the effective length of the voice coil 2 can be prolonged, thereby improving the performance of the micro-speaker.

The number of the concave portions 21 may be one or plural, and preferably the number of the concave portions 21 is plural.

Alternatively, the number of the concave portions 21 is an even number, and the concave portions 21 with the even number are arranged in a one-to-one opposite manner. That is, the number of the plurality of concave portions 21 may be divided into a plurality of groups, each group includes two concave portions 21, and the two concave portions 21 in the same group are disposed opposite to each other, so that the vibrating diaphragm assembly is stressed and balanced, and rolling and polarizing phenomena of the voice coil 2 are improved, which is beneficial to further improving performance of the micro-speaker. Preferably, the voice coil 2 has a symmetrical structure.

At least part of the concave portion 21 is disposed on the long axis side of the voice coil 2; and/or at least part of the concave portion 21 is provided on the short axis side of the voice coil 2; and/or at least part of the concave portion 21 is located at a corner of the voice coil 2. In other words, the concave portion 21 is provided on at least one of the major axis side, the minor axis side, and the corner of the voice coil 2. In some special cases, the voice coil 2 may be provided with the concave portion 21 on all three sides of the major axis, the minor axis and the corners.

In this embodiment, the number of the concave portions 21 is two, and the two concave portions 21 are respectively disposed on different long axis sides of the voice coil 2, specifically, the concave portion 21 is disposed in a middle area of the long axis side of the voice coil 2, more specifically, when the central magnetic assembly 4 is viewed from the top, the central magnetic assembly 4 is in an i shape.

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. A miniature loudspeaker, characterized by: comprising

A yoke;

the side magnetic assemblies are arranged on the yoke iron;

the voice coil is provided with at least one concave part;

2. A micro-speaker as claimed in claim 1, wherein: the number of the concave parts is a plurality.

3. A micro-speaker as claimed in claim 2, wherein: the number of the concave parts is even, and the concave parts with the even number are arranged in a one-to-one opposite mode.

4. A micro-speaker as claimed in claim 1, wherein: at least part of the concave part is arranged on the long axis side of the voice coil.

5. A micro-speaker as claimed in claim 1, wherein: at least part of the concave part is arranged on the short axis side of the voice coil.

6. A micro-speaker as claimed in claim 1, wherein: at least a portion of the recess is located at a corner of the voice coil.

7. A micro-speaker as claimed in claim 1, wherein: the number of the side magnetic assemblies is four.

8. A micro-speaker as claimed in claim 1, wherein: the central magnetic assembly comprises central magnetic steel and a central washer, and the central magnetic steel is connected with the central washer and the yoke.

9. A micro-speaker as claimed in claim 8, wherein: the edge of one side of the central washer, which is far away from the central magnetic steel, is provided with an avoidance pressing edge.

10. A micro-speaker as claimed in claim 1, wherein: the voice coil loudspeaker voice coil also comprises a basin frame and a vibrating diaphragm assembly, wherein the side magnetic assembly is connected with the basin frame, and the vibrating diaphragm assembly is connected with the basin frame and the voice coil loudspeaker voice coil.