CN220307358U

CN220307358U - Miniature loudspeaker

Info

Publication number: CN220307358U
Application number: CN202321398237.0U
Authority: CN
Inventors: 张俊利; 康恺轩
Original assignee: Shenzhen Weishi Acoustics Co Ltd
Current assignee: Shenzhen Weishi Acoustics Co Ltd
Priority date: 2023-06-02
Filing date: 2023-06-02
Publication date: 2024-01-05
Anticipated expiration: 2033-06-02

Abstract

The utility model discloses a miniature loudspeaker, which comprises a basin frame, a yoke, a side magnetic structure, a first center magnetic structure, a first vibration component and a high-pitched unit, wherein the yoke is provided with a convex hull, and the wall surface of the convex hull is provided with air holes; the side magnetic structure is connected with the basin stand and the yoke; the first central magnetic structure is provided with a through hole for avoiding the convex hull and is connected with the yoke iron; the first vibration assembly comprises a first vibration film assembly and a first voice coil and a second voice coil which are respectively connected with the first vibration film assembly, and the first vibration film assembly is connected with the basin frame; the high pitch unit is arranged at the opening of the convex hull; a first magnetic gap for the first voice coil to move is formed between the first central magnetic structure and the convex hull, and a second magnetic gap for the second voice coil to move is formed between the side magnetic structure and the first central magnetic structure. The miniature loudspeaker has novel structure, high sensitivity, good bass effect and small section thickness, and is suitable for light and thin electronic equipment.

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 miniature electroacoustic devices applied thereto are also increasing.

The micro-speaker generally adopts high and low frequency division to enhance sound effect, and the Chinese patent publication No. CN217721457U discloses a coaxial speaker which comprises a high-pitched unit and a low-pitched unit, and the low-pitched effect is found to be bad in the actual use process, and further enhanced space exists. Moreover, the profile height is higher, and the problem that a larger installation space is required to be occupied exists.

Disclosure of Invention

The utility model mainly aims to provide a miniature loudspeaker with a novel structure, and aims to solve the problems of poor bass effect and large thickness of the traditional miniature loudspeaker.

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

a basin stand;

the yoke is provided with a convex hull, and the wall surface of the convex hull is provided with air holes;

the side magnetic structure is connected with the basin frame and the yoke;

the first central magnetic structure is provided with a through hole for avoiding the convex hull and is connected with the yoke;

the first vibration assembly comprises a first vibrating diaphragm assembly and a first voice coil and a second voice coil which are respectively connected with the first vibrating diaphragm assembly, and the first vibrating diaphragm assembly is connected with the basin frame;

the high-pitch unit is arranged at the opening of the convex hull;

a first magnetic gap for the first voice coil to move is formed between the first central magnetic structure and the convex hull, and a second magnetic gap for the second voice coil to move is formed between the side magnetic structure and the first central magnetic structure.

Further, the two opposite wall surfaces of the convex hull are provided with the air holes, and the air holes on the two opposite wall surfaces of the convex hull are in one-to-one correspondence and mirror symmetry.

Further, the shape of the ventilation holes is polygonal, circular or elliptical.

Further, the first central magnetic structure comprises annular central magnetic steel and annular central washer, and the annular central magnetic steel is connected with the yoke and the annular central washer.

Further, the top surface of the convex hull is coplanar with the top surface of the annular washer.

Further, the side magnetic structure comprises side magnetic steel and Bian Huasi, the side magnetic steel is connected with the Bian Huasi and the yoke, the number of the side magnetic steel is multiple, and the side magnetic steel with the number being multiple is arranged in a rectangular frame around the first central magnetic structure.

Further, the treble unit comprises a second central magnetic structure and a second vibration assembly, the second central magnetic structure is connected with the yoke, at least part of the second central magnetic structure is located in the hollow area of the convex hull, a third magnetic gap is formed between the second central magnetic structure and the inner peripheral wall of the convex hull, the second vibration assembly comprises a second vibrating diaphragm assembly and a third voice coil which are connected, the second vibrating diaphragm assembly is connected with the yoke and seals the opening of the convex hull, and the third voice coil moves in the third magnetic gap.

Further, the bottom of the yoke is provided with an annular washer which is arranged around the opening of the convex hull, and the second vibrating diaphragm assembly is indirectly connected with the yoke through the annular washer.

Further, the annular washer comprises an annular portion and an extending portion, the outer edge of the annular portion is bent and extends in the direction away from the yoke to form the extending portion, and the connecting position of the second vibrating diaphragm assembly and the annular washer is located on the extending portion.

Further, the bottom surface of the extension portion and the peripheral wall of the extension portion are both glued to the second diaphragm assembly.

The utility model has the beneficial effects that: the micro-speaker is novel in structure and provided with two bass voice coils, so that the sensitivity and the bass effect of the micro-speaker are effectively improved, the acoustic performance of the micro-speaker is improved, and the use experience of a user is enhanced; the high-pitch unit and the low-pitch unit are coaxially arranged back to back, and the magnetic circuit component of the high-pitch unit is arranged in the convex hull of the yoke, so that the section thickness of the micro-speaker can be effectively reduced, the volume required by mounting the micro-speaker is reduced, and the micro-speaker can be well adapted to light and thin electronic equipment; the center of the first center magnetic structure is provided with a through hole avoiding the convex hull on the yoke, so that the production consumable of the first center magnetic structure is reduced, and the utilization efficiency of the first center magnetic structure is improved; the ventilation holes on the convex hull wall surface can enable the high-pitched units to realize good ventilation, and enable the inside and outside air of the high-pitched units to be exchanged smoothly.

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

fig. 2 is a schematic structural diagram of a micro-speaker according to another embodiment of the present utility model;

fig. 3 is a cross-sectional view of a micro speaker according to a first embodiment of the present utility model.

Reference numerals illustrate:

1. a basin stand;

2. a yoke; 21. convex hulls; 211. ventilation holes;

3. a side magnetic structure;

4. a first central magnetic structure;

5. a first vibration assembly; 51. a first diaphragm assembly; 52. a first voice coil; 53. a second voice coil;

6. a treble unit; 61. a second central magnetic structure; 62. a second vibration assembly;

71. a first magnetic gap; 72. a second magnetic gap; 73. a third magnetic gap;

8. annular washer; 81. an annular portion; 82. an extension.

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 this application, unless specifically stated 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 terms in this application will be understood by those of ordinary skill in the art as the case may be.

Example 1

Referring to fig. 1 to 3, a first embodiment of the present utility model is as follows: a micro loudspeaker can be applied to electronic facilities such as mobile phones, tablet computers, smart watches, game handles, wearable devices and the like.

The miniature loudspeaker comprises a basin frame 1, a yoke 2, a side magnetic structure 3, a first central magnetic structure 4, a first vibration component 5 and a high-pitched unit 6, wherein the yoke 2 is provided with a convex hull 21, preferably the convex hull 21 is positioned in the central area of the yoke 2, the wall surface of the convex hull 21 is provided with air holes 211, and the convex hull 21 is a stamping structure formed by stamping; the side magnetic structure 3 is connected with the basin frame 1 and the yoke 2; the first central magnetic structure 4 is provided with a through hole for avoiding the convex hull 21, the first central magnetic structure 4 is connected with the yoke 2, a first magnetic gap 71 is formed between the first central magnetic structure 4 and the convex hull 21, namely, a partial area of the through hole of the first central magnetic structure 4 is used as the first magnetic gap 71; the side magnetic structure 3 is located outside the first central magnetic structure 4, and a second magnetic gap 72 is formed between the side magnetic structure 3 and the first central magnetic structure 4; the first vibration assembly 5 comprises a first vibration film assembly 51 and a first voice coil 52 and a second voice coil 53 which are respectively connected with the first vibration film assembly 51, the first vibration film assembly 51 is connected with the basin frame 1, the first voice coil 52 moves in the first magnetic gap 71, and the second voice coil 53 moves in the second magnetic gap 72; the first diaphragm assembly 51 includes a first sound film, and the outer edge of the first sound film is connected with the basin frame 1, so as to improve the rigidity of the first sound film, and optionally, the first diaphragm assembly 51 further includes a first dome disposed on the first sound film.

It will be appreciated that the aperture of the first voice coil 52 is smaller than the aperture of the second voice coil 53, that is, when the first vibration assembly 5 is viewed, the first voice coil 52 is located in the hollow region of the second voice coil 53.

The first central magnetic structure 4 comprises annular central magnetic steel and annular central washer, and the annular central magnetic steel is connected with the yoke 2 and the annular central washer. In this embodiment, the top surface of the convex hull 21 is coplanar with the top surface of the annular washer 8, so that the magnetic field utilization efficiency of the micro-speaker can be improved on the basis of ensuring that the first vibration component 5 can realize larger vibration, and in other embodiments, the top surface of the convex hull 21 is slightly higher than the top surface of the annular washer 8 or slightly lower than the top surface of the annular washer 8, so that the requirements of processing precision and assembly precision can be reduced.

The side magnetic structure 3 comprises side magnetic steels and Bian Huasi, the side magnetic steels are connected with the Bian Huasi and the yoke 2, the Bian Huasi is connected with the basin frame 1, the number of the side magnetic steels is multiple, and the number of the side magnetic steels is multiple, are distributed around the first central magnetic structure 4 in a rectangular frame shape to form the second magnetic gap 72 with the first central magnetic structure 4.

The treble unit 6 is disposed at the opening of the convex hull 21, the treble unit 6 includes a second central magnetic structure 61 and a second vibration component 62, the second central magnetic structure 61 is connected to the yoke 2, at least a portion of the second central magnetic structure 61 is located in the hollow area of the convex hull 21, in this embodiment, the bottom surface of the second central magnetic structure 61 protrudes relative to the bottom surface of the yoke 2, in other embodiments, it is also possible that the bottom surface of the second central magnetic structure 61 is flush with the bottom surface of the yoke 2 or higher than the bottom surface of the yoke 2, and may be specifically selected according to actual needs; a third magnetic gap 73 is formed between the second central magnetic structure 61 and the inner peripheral wall of the convex hull 21, the second vibration component 62 includes a second vibration membrane component and a third voice coil, the second vibration membrane component is connected with the yoke 2 and seals the opening of the convex hull 21, and the third voice coil moves in the third magnetic gap 73; the second vibrating diaphragm assembly comprises a second sound membrane, the outer edge of the second sound membrane is connected with the yoke 2, and in order to improve the rigidity of the second sound membrane, the second vibrating diaphragm assembly further comprises a second dome arranged on the second sound membrane. The second central magnetic structure 61 includes a high-pitch central magnetic steel and a high-pitch central washer, the high-pitch central magnetic steel connects the top wall of the convex hull 21 with the high-pitch central washer, and the high-pitch central washer is located below the high-pitch central magnetic steel.

In order to enhance the magnetic field utilization rate of the micro-speaker, the bottom of the yoke 2 is provided with an annular washer 8 surrounding the opening of the convex hull 21, and the second diaphragm assembly is indirectly connected with the yoke 2 through the annular washer 8. Specifically, the annular washer 8 includes an annular portion 81 and an extension portion 82, the outer edge of the annular portion 81 is bent and extended in a direction away from the yoke 2 to form the extension portion 82, and a connection position between the second diaphragm assembly and the annular washer 8 is located on the extension portion 82. The annular washer 8 thus constructed can provide a larger vibration space for the second diaphragm assembly, thereby enhancing the amplitude of the tweeter unit 6. In this embodiment, the bottom surface of the extension 82 and the peripheral wall of the extension 82 are glued to the second diaphragm assembly. More specifically, the outer edges of the second sound membrane are respectively in contact with and adhesively connected to the bottom surface and the outer wall surface of the extension 82.

In other embodiments, the bottom surface of the yoke 2 may further have a mounting groove provided around the opening of the convex hull 21 for positioning and mounting the annular washer 8.

In order to balance the ventilation inside and outside the treble unit 6, the two opposite wall surfaces of the convex hull 21 are provided with the ventilation holes 211, the ventilation holes 211 on the two opposite wall surfaces of the convex hull 21 are in one-to-one correspondence and mirror symmetry, and optionally, the ventilation holes 211 are polygonal, circular or elliptical.

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 basin stand;

the side magnetic structure is connected with the basin frame and the yoke;

the high-pitch unit is arranged at the opening of the convex hull;

2. A micro-speaker as claimed in claim 1, wherein: the two opposite wall surfaces of the convex hull are provided with the air holes, and the air holes on the two opposite wall surfaces of the convex hull are in one-to-one correspondence and mirror symmetry.

3. A micro-speaker as claimed in claim 2, wherein: the shape of the vent holes is polygonal, circular or elliptical.

4. A micro-speaker as claimed in claim 1, wherein: the first central magnetic structure comprises annular central magnetic steel and annular central washer, and the annular central magnetic steel is connected with the yoke and the annular central washer.

5. A micro-speaker as claimed in claim 4, wherein: the top surface of the convex hull is coplanar with the top surface of the annular center washer.

6. A micro-speaker as claimed in claim 1, wherein: the side magnetic structure comprises side magnetic steels and Bian Huasi, the side magnetic steels are connected with the Bian Huasi and the yoke, the number of the side magnetic steels is multiple, and the side magnetic steels are distributed in a rectangular frame around the first central magnetic structure.

7. A micro-speaker as claimed in claim 1, wherein: the high-pitch unit comprises a second central magnetic structure and a second vibration assembly, the second central magnetic structure is connected with the yoke, at least part of the second central magnetic structure is located in a hollow area of the convex hull, a third magnetic gap is formed between the second central magnetic structure and the inner peripheral wall of the convex hull, the second vibration assembly comprises a second vibration film assembly and a third voice coil which are connected, the second vibration film assembly is connected with the yoke and seals an opening of the convex hull, and the third voice coil moves in the third magnetic gap.

8. A micro-speaker as claimed in claim 7, wherein: the bottom of the yoke is provided with an annular washer which is arranged around the opening of the convex hull, and the second vibrating diaphragm assembly is indirectly connected with the yoke through the annular washer.

9. A micro-speaker as claimed in claim 8, wherein: the annular washer comprises an annular part and an extending part, the outer edge of the annular part is bent and extended towards the direction far away from the yoke to form the extending part, and the connecting position of the second vibrating diaphragm assembly and the annular washer is located on the extending part.

10. A micro-speaker as claimed in claim 9, wherein: the bottom surface of the extension part and the peripheral wall of the extension part are glued with the second vibrating diaphragm assembly.