CN117061966A

CN117061966A - Miniature loudspeaker

Info

Publication number: CN117061966A
Application number: CN202311163229.2A
Authority: CN
Inventors: 张俊利; 陈杰
Original assignee: Shenzhen Weishi Acoustics Co Ltd
Current assignee: Shenzhen Weishi Acoustics Co Ltd
Priority date: 2023-09-08
Filing date: 2023-09-08
Publication date: 2023-11-14

Abstract

The application discloses a miniature loudspeaker, which comprises a basin frame, a first vibration assembly, a second vibration assembly, a magnetic circuit assembly and a driving voice coil, wherein elastic waves are arranged on the basin frame, the first vibration assembly comprises a first vibration film assembly and a first voice coil which are connected, the first vibration film assembly is connected with the top of the basin frame, the second vibration assembly comprises a second vibration film assembly and a second voice coil which are connected, the second vibration film assembly is connected with the bottom of the basin frame, the magnetic circuit assembly is connected with the elastic waves, the driving voice coil is arranged in the basin frame, and the driving voice coil is used for driving the magnetic circuit assembly to vibrate. The miniature loudspeaker is novel in structure, the magnetic circuit component is movably arranged in the basin frame through the elastic wave, and ampere force is applied to the magnetic circuit component through the driving voice coil, so that the magnetic circuit component vibrates, and the generated vibration phase is the same as that of the first voice coil/the second voice coil, thereby avoiding the first voice coil/the second voice coil from jumping out of the first magnetic gap/the second magnetic gap due to overlarge amplitude, and causing the distortion of the miniature loudspeaker.

Description

Miniature loudspeaker

Technical Field

The application relates to the technical field of electroacoustic converters, in particular to a miniature loudspeaker.

Background

At present, mobile terminals such as mobile phones and tablet computers enrich the lives of people, and electroacoustic converters play an indispensable role as audio devices. Meanwhile, the requirements of consumers on sound loudness are increasingly increased, and correspondingly, the requirements of designers on performances of electroacoustic converters such as micro-speakers are also increased, so that micro-speakers capable of vibrating on two sides are generated, but when the double-sided speakers vibrate at low frequency and large amplitude, the phenomenon that voice coils jump out of magnetic gaps of magnetic circuit assemblies is easy to occur, namely the existing double-sided micro-speakers have high distortion risk under the working condition of low frequency and large amplitude.

Disclosure of Invention

The technical problems solved by the application are as follows: a micro speaker with low risk of distortion is provided.

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

the basin stand is provided with a spring wave;

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

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

the magnetic circuit assembly is connected with the elastic wave, a first magnetic gap for the first voice coil to move is formed in the top of the magnetic circuit assembly, and a second magnetic gap for the second voice coil to move is formed in the bottom of the magnetic circuit assembly;

the driving voice coil is arranged in the basin frame and is used for driving the magnetic circuit assembly to vibrate.

The application has the beneficial effects that: the miniature loudspeaker is novel in structure, the magnetic circuit component is movably arranged in the basin frame through the elastic wave, ampere force is applied to the magnetic circuit component through the driving voice coil, the magnetic circuit component vibrates, the generated vibration phase is identical to that of the first voice coil/the second voice coil, therefore, the phenomenon that the first voice coil/the second voice coil jumps out of the first magnetic gap/the second magnetic gap due to overlarge amplitude is avoided, the miniature loudspeaker is distorted, meanwhile, the amplitude of the first voice coil/the second voice coil is enlarged due to the fact that the vibration phase of the first voice coil/the second voice coil is identical to that of the magnetic circuit component, and the loudness of the miniature loudspeaker is increased, and the acoustic performance of the miniature loudspeaker is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application 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 application, 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 cross-sectional view of a micro-speaker according to a first embodiment of the present application;

fig. 2 is a schematic structural diagram of a magnetic circuit assembly in a micro-speaker according to a first embodiment of the present application;

fig. 3 is a schematic structural diagram of a damper in a micro-speaker according to a first embodiment of the present application.

Reference numerals illustrate:

11. a first bracket; 12. a second bracket;

21. a first diaphragm assembly; 22. a first voice coil;

31. a second diaphragm assembly; 32. a second voice coil;

41. a yoke; 411. a first flanging; 42. a first center magnetic steel; 43. a first side magnetic steel; 44. a first central washer; 45. a first side washer; 46. a second center magnetic steel; 47. a second side magnetic steel; 48. a second central washer; 49. second Bian Huasi;

5. driving the voice coil;

6. a flick wave; 61. a cantilever; 62. a first mounting portion; 63. a second mounting portion; 64. and a bonding pad.

Detailed Description

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

The following description of the embodiments of the present application 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 application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that, in the embodiment of the present application, 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 application, 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 application.

In the present application, 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 application 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 application is as follows: a micro loudspeaker can be applied to electronic equipment such as mobile phones, intelligent watches, tablet computers, notebook computers and the like.

The miniature loudspeaker comprises a basin frame, a first vibration assembly, a second vibration assembly, a magnetic circuit assembly and a driving voice coil 5, wherein the basin frame is provided with a damper 6, the first vibration assembly comprises a first vibrating diaphragm assembly 21 and a first voice coil 22 which are connected, and the first vibrating diaphragm assembly 21 is connected with the top of the basin frame; the second vibration assembly comprises a second vibration film assembly 31 and a second voice coil 32 which are connected, and the second vibration film assembly 31 is connected with the bottom of the basin frame; the magnetic circuit assembly is connected with the elastic wave 6, a first magnetic gap for the first voice coil 22 to move is formed at the top of the magnetic circuit assembly, and a second magnetic gap for the second voice coil 32 to move is formed at the bottom of the magnetic circuit assembly; the driving voice coil 5 is arranged in the basin frame, and the driving voice coil 5 is used for driving the magnetic circuit assembly to vibrate.

In some embodiments, the material of the elastic wave 6 may be plastic, flexible circuit board, etc., but in order to ensure structural stability of the micro-speaker, it is preferable that the material of the elastic wave 6 is metal. Specifically, the elastic wave 6 includes a cantilever 61, and a first mounting portion 62 and a second mounting portion 63 respectively connected to the cantilever 61, the first mounting portion 62 is connected to the magnetic circuit assembly, and the second mounting portion 63 is connected to the basin stand; at least part of the second mounting portion 63 is connected with a bonding pad 64, at least part of the bonding pad 64 is exposed out of the basin frame to form a bonding surface, and the first voice coil 22 is electrically connected with the elastic wave 6.

In this embodiment, the basin frame includes a first support 11 and a second support 12 that are connected, the first support 11 and the second support 12 are respectively in a ring frame shape, the first vibrating diaphragm assembly 21 is connected to the top of the first support 11, the second vibrating diaphragm assembly 31 is connected to the bottom of the second support 12, the elastic wave 6 is connected to the first support 11, and the interface between the first support 11 and the second support 12 forms the welding surface. Optionally, the corners of the first support 11 protrude from the corners of the second support 12 to form protruding portions, and the welding surface is located on the outer surface of the protruding portions, so that the space occupied by the basin stand can be effectively reduced, thereby ensuring that the micro-speaker can maintain miniaturization.

The elastic wave 6 is L-shaped integrally, and the elastic wave 6 is connected with two adjacent side edges of the magnetic circuit assembly simultaneously, so that the stress of the magnetic circuit assembly is balanced, and the vibration process of the magnetic circuit assembly is stable. In this embodiment, the number of the elastic waves 6 is two, each elastic wave 6 has two bonding pads 64, the suspension end of the cantilever 61 and the two bonding pads 64 are fixed on the first bracket 11, and the two bonding pads 64 respectively correspond to two corners of the first bracket 11.

Optionally, the connection between the elastic wave 6 and the magnetic circuit assembly is located on the top surface of the magnetic circuit assembly, that is, the first mounting portion 62 is located on the top surface of the magnetic circuit assembly. Of course, it is also possible that the connection between the elastic wave 6 and the magnetic circuit assembly is located on the outer peripheral wall of the magnetic circuit assembly, and the connection may be specifically set according to actual needs.

In detail, the magnetic circuit assembly includes a yoke 41, a first central magnetic structure, a first side magnetic structure, a second central magnetic structure, and a second side magnetic structure, where the first central magnetic structure and the first side magnetic structure are respectively disposed on the top surface of the yoke 41, the first side magnetic structure is disposed around the first central magnetic structure, the first central magnetic structure and the first side magnetic structure form a first magnetic gap therebetween, and the elastic wave 6 is connected with the first side magnetic structure; the second center magnetic structure and the second side magnetic structure are respectively arranged on the bottom surface of the yoke 41, the second side magnetic structure is arranged around the second center magnetic structure, and the second magnetic gap is formed between the second center magnetic structure and the second side magnetic structure; the first central magnetic structure comprises a first central magnetic steel 42, the first side magnetic structure comprises a first side magnetic steel 43, the second central magnetic structure comprises a second central magnetic steel 46, and the second side magnetic structure comprises a second side magnetic steel 47.

In order to improve the performance of the micro-speaker, the first central magnetic structure further comprises a first central washer 44, and the top surface of the first central magnetic steel 42 is connected with the first central washer 44; the first side magnetic structure further comprises a first side washer 45, the top surface of the first side magnetic steel 43 is connected with the first side washer 45, preferably the whole first side washer 45 is in a ring frame shape, the elastic wave 6 is connected with the first side washer 45, more specifically, the bottom surface of the first mounting part 62 is connected with the top surface of the first side washer 45; the second central magnetic structure further comprises a second central washer 48, and the bottom surface of the second central magnetic steel 46 is connected with the top surface of the second central washer 48; the second side magnetic structure further comprises a second Bian Huasi, and the bottom surface of the second side magnetic steel 47 is connected with the top surface of the second Bian Huasi.

The driving voice coil 5 is disposed in the second bracket 12, the driving voice coil 5 is disposed below the yoke 41, and the second side magnetic structure is disposed corresponding to the hollow area of the driving voice coil 5.

In order to improve the structural stability of the magnetic circuit assembly, optionally, the yoke 41 is connected with the first edge washer 45, in this embodiment, the yoke 41 has a first flange 411, the first flange 411 is formed by bending up a part of the area of the yoke 41, the number of the first flanges 411 is multiple, the first flange 411 and the first edge washer 45 are welded, adhered or clamped, and specifically, the four corners of the yoke 41 are respectively provided with the first flanges 411 correspondingly. Similarly, the yoke 41 may have a second flange for connecting the second Bian Huasi, and in this case, a window is provided on the yoke 41, and the second flange is connected to a side wall of the window.

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

Claims

1. A miniature loudspeaker, characterized by: comprising

The basin stand is provided with a spring wave;

2. A micro-speaker as claimed in claim 1, wherein: the material of the elastic wave is metal.

3. A micro-speaker as claimed in claim 2, wherein: the elastic wave comprises a cantilever and a first installation part and a second installation part which are respectively connected with the cantilever, the first installation part is connected with the magnetic circuit assembly, and the second installation part is connected with the basin frame; at least part of the second installation part is connected with a bonding pad, at least part of the bonding pad is exposed out of the basin frame to form a welding surface, and the first voice coil is electrically connected with the elastic wave.

4. A micro-speaker as claimed in claim 3, wherein: the basin frame comprises a first support and a second support which are connected, the first support and the second support are respectively in a ring frame shape, the first vibrating diaphragm assembly is connected with the top of the first support, the second vibrating diaphragm assembly is connected with the bottom of the second support, and a welding surface is formed at the interface of the first support and the second support.

5. A micro-speaker as claimed in claim 1, wherein: the whole L-shaped bullet ripples that is, the bullet ripples simultaneously with magnetic circuit assembly's adjacent both sides limit is connected.

6. A micro-speaker as claimed in claim 5, wherein: the connection part of the elastic wave and the magnetic circuit assembly is positioned on the top surface of the magnetic circuit assembly.

7. A micro-speaker as claimed in claim 1, wherein: the magnetic circuit assembly comprises a yoke, a first central magnetic structure, a first side magnetic structure, a second central magnetic structure and a second side magnetic structure, wherein the first central magnetic structure and the first side magnetic structure are respectively arranged on the top surface of the yoke, the first side magnetic structure is arranged around the first central magnetic structure, a first magnetic gap is formed between the first central magnetic structure and the first side magnetic structure, and the elastic wave is connected with the first side magnetic structure; the second center magnetic structure and the second side magnetic structure are respectively arranged on the bottom surface of the yoke, the second side magnetic structure is arranged around the second center magnetic structure, and a second magnetic gap is formed between the second center magnetic structure and the second side magnetic structure; the first central magnetic structure comprises first central magnetic steel, the first side magnetic structure comprises first side magnetic steel, the second central magnetic structure comprises second central magnetic steel, and the second side magnetic structure comprises second side magnetic steel.

8. A micro-speaker as claimed in claim 7, wherein: the first central magnetic structure further comprises a first central washer, and the top surface of the first central magnetic steel is connected with the first central washer.

9. A micro-speaker as claimed in claim 7, wherein: the first side magnetic structure further comprises a first side washer, the top surface of the first side magnetic steel is connected with the first side washer, and the elastic wave is connected with the first side washer.

10. A micro-speaker as claimed in claim 7, wherein: the driving voice coil is located below the yoke, and the second side magnetic structure is arranged corresponding to the hollow area of the driving voice coil.