CN220965137U

CN220965137U - Miniature loudspeaker

Info

Publication number: CN220965137U
Application number: CN202322493132.XU
Authority: CN
Inventors: 张文华; 张俊利
Original assignee: Shenzhen Weishi Acoustics Co Ltd
Current assignee: Shenzhen Weishi Acoustics Co Ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-05-14
Anticipated expiration: 2033-09-13

Abstract

The utility model discloses a miniature loudspeaker, which comprises a basin frame, a voice coil assembly, a vibrating diaphragm assembly and a magnetic circuit assembly, wherein the voice coil assembly comprises a first voice coil and a second voice coil which are connected, the first voice coil and the second voice coil are respectively and electrically connected with an external power supply, and the first voice coil and the second voice coil are mutually and independently controlled; the vibrating diaphragm assembly is connected with the basin stand and the voice coil assembly; the magnetic circuit assembly is connected with the basin frame and is provided with a magnetic gap for the voice coil assembly to move. The miniature loudspeaker is novel in structure, the first voice coil and the second voice coil are respectively and independently controlled, good electrical control performance is achieved, under normal conditions, the first voice coil and the second voice coil move in the same direction, so that stronger driving force is provided for the vibrating diaphragm assembly, when the miniature loudspeaker is about to resonate, current of the first voice coil or the second voice coil can be controlled to reversely flow, nonlinear phenomenon of the miniature loudspeaker is improved, and the miniature loudspeaker has better transient state performance.

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 quality requirements of the miniature electroacoustic devices applied therein are increasing.

In the working process of the traditional micro-speaker, resonance sometimes occurs, so that nonlinear vibration occurs, and the electrical control performance of the traditional micro-speaker is poor and cannot be adjusted, so that the transient performance of the micro-speaker is poor.

Disclosure of utility model

The utility model mainly aims to provide a miniature loudspeaker with a novel structure, and aims to solve the problem that the traditional miniature loudspeaker is easy to generate nonlinear vibration and causes poor transient performance.

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

a basin stand;

The voice coil assembly comprises a first voice coil and a second voice coil which are connected, the first voice coil and the second voice coil are respectively and electrically connected with an external power supply, and the first voice coil and the second voice coil are mutually independently controlled;

The vibrating diaphragm assembly is connected with the basin frame and the voice coil assembly;

The magnetic circuit assembly is connected with the basin frame and provided with a magnetic gap for the voice coil assembly to move.

In an embodiment, the magnetic circuit assembly includes a yoke, and a central magnetic structure and a side magnetic structure respectively disposed on the yoke, wherein the side magnetic structure is disposed around the central magnetic structure, and the magnetic gap is formed between the central magnetic structure and the side magnetic structure.

In an embodiment, the basin stand is connected to the yoke and/or the side magnetic structure.

In an embodiment, the central magnetic structure comprises a first central magnetic steel, a first central washer, a second central magnetic steel and a second central washer which are sequentially connected in a lamination manner from bottom to top; the side magnetic structure comprises a plurality of groups of magnetic components, wherein the magnetic components comprise a first side magnetic steel, a first side washer, a second side magnetic steel and a second Bian Huasi which are sequentially laminated and connected from bottom to top; the first voice coil is located above the second voice coil, the magnetic gap comprises a first gap and a second gap which are communicated, the first gap is located above the second gap, the first voice coil is arranged corresponding to the first gap, and the second voice coil is arranged corresponding to the second gap.

In an embodiment, the first voice coil and the second voice coil are respectively rectangular frame-shaped, the length of the first voice coil is smaller than that of the second voice coil, and the width of the first voice coil is smaller than that of the second voice coil.

In an embodiment, two adjacent second Bian Huasi are connected by a connecting arm, and a plurality of second Bian Huasi are connected by the connecting arm to form a ring frame structure.

In an embodiment, the voice coil assembly further comprises a centering support piece, and the centering support piece is connected with the voice coil assembly and the basin frame.

In an embodiment, the centering support piece comprises an inner mounting portion, a cantilever portion and an outer mounting portion, wherein the top surface of the inner mounting portion is connected with the bottom surface of the first voice coil, the bottom surface of the inner mounting portion is connected with the top surface of the second voice coil, and the outer mounting portion is fixed on the basin frame.

In an embodiment, a conducting circuit is arranged on the centering support, the conducting circuit comprises a first bonding pad, a conductive wire and a second bonding pad which are sequentially connected, the first bonding pad is arranged on the inner mounting part, and the second bonding pad is arranged on the outer mounting part and is exposed; the number of the conducting circuits is four, two first bonding pads are connected and conducted with the first voice coil, and the other two first bonding pads are connected and conducted with the second voice coil.

In one embodiment, the inner mounting portion is in the shape of a ring frame.

The utility model has the beneficial effects that: the miniature loudspeaker is novel in structure, the first voice coil and the second voice coil are respectively and independently controlled, good electrical control performance is achieved, under normal conditions, the first voice coil and the second voice coil move in the same direction, therefore stronger driving force is provided for the vibrating diaphragm assembly, when the external detection module detects the miniature loudspeaker, namely resonance is generated or resonance is generated, the external power supply can control current of the first voice coil or the second voice coil to flow reversely, nonlinear phenomenon of the miniature loudspeaker is improved, and the miniature loudspeaker has better transient state performance.

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

fig. 2 is a schematic structural diagram of a centering support in a micro speaker according to an embodiment of the present utility model.

Reference numerals illustrate:

1. A basin stand;

21. A first voice coil; 22. a second voice coil;

3. a diaphragm assembly;

4. A yoke;

5. A central magnetic structure; 51. a first center magnetic steel; 52. a first central washer; 53. a second center magnetic steel; 54. a second central washer;

6. A side magnetic structure; 61. a first side magnetic steel; 62. a first side washer; 63. a second side magnetic steel; 64. second Bian Huasi;

7. a magnetic gap; 71. a first gap; 72. a second gap;

8. Centering support pieces; 81. an inner mounting portion; 82. a cantilever portion; 83. 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 merely for explaining a relative positional relationship, a movement condition, and the like between the components in a specific posture as 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 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 and 2, a first embodiment of the utility model is as follows: a micro loudspeaker can be applied to electronic equipment such as mobile phones, intelligent watches, notebook computers and the like.

The miniature loudspeaker comprises a basin frame 1, a voice coil assembly, a vibrating diaphragm assembly 3 and a magnetic circuit assembly, wherein the vibrating diaphragm assembly 3 is connected with the basin frame 1 and the voice coil assembly, the voice coil assembly comprises a first voice coil 21 and a second voice coil 22 which are connected, the first voice coil 21 and the second voice coil 22 are respectively and electrically connected with an external power supply, the first voice coil 21 and the second voice coil 22 are independently controlled, the magnetic circuit assembly is connected with the basin frame 1, and the magnetic circuit assembly is provided with a magnetic gap 7 for the voice coil assembly to move.

The magnetic circuit assembly comprises a yoke 4, a central magnetic structure 5 and a side magnetic structure 6 which are respectively arranged on the yoke 4, wherein the side magnetic structure 6 surrounds the central magnetic structure 5, a magnetic gap 7 is formed between the central magnetic structure 5 and the side magnetic structure 6, and the basin frame 1 is connected with the yoke 4 and/or the side magnetic structure 6.

In this embodiment, the central magnetic structure 5 includes a first central magnetic steel 51, a first central washer 52, a second central magnetic steel 53 and a second central washer 54 that are sequentially stacked and connected from bottom to top; the side magnetic structure 6 comprises a plurality of groups of magnetic components, the magnetic components comprise a first side magnetic steel 61, a first side washer 62, a second side magnetic steel 63 and a second Bian Huasi which are sequentially connected in a laminated manner from bottom to top, optionally, the number of the magnetic components is four, and the four sides of the central magnetic structure 5 are respectively provided with the magnetic components correspondingly; the first voice coil 21 is located above the second voice coil 22, the magnetic gap 7 comprises a first gap 71 and a second gap 72 which are communicated, the first gap 71 is located above the second gap 72, the first voice coil 21 is arranged corresponding to the first gap 71, and the second voice coil 22 is arranged corresponding to the second gap 72. In detail, the first central washer 52 is generally aligned with the first side washer 62, and the second central washer 54 is generally aligned with the second Bian Huasi 64. In the micro-speaker of the embodiment, the magnetic circuit assembly can form a plurality of magnetic loops, and the voice coil assembly can be driven to move more efficiently.

The first voice coil 21 and the second voice coil 22 are respectively rectangular, the length of the first voice coil 21 is smaller than that of the second voice coil 22, and the width of the first voice coil 21 is smaller than that of the second voice coil 22. Preferably, the first voice coil 21 and the second voice coil 22 are concentrically arranged.

In order to facilitate the processing and assembly and further improve the B value of the micro-speaker, it is preferable that two adjacent second Bian Huasi 64 are connected by a connecting arm, and a plurality of second Bian Huasi 64 are connected by the connecting arm to form a ring frame structure, and it is preferable that the second Bian Huasi 64 and the connecting arm are integrally formed as an integral structure. In this embodiment, the second Bian Huasi and the basin stand 1 are injection molded as an integral structure.

The micro-speaker further comprises a centering support piece 8, and the centering support piece 8 is connected with the voice coil assembly and the basin frame 1. Specifically, the centering support 8 includes an inner mounting portion 81, a cantilever portion 82, and an outer mounting portion 83, wherein the top surface of the inner mounting portion 81 is connected to the bottom surface of the first voice coil 21, the bottom surface of the inner mounting portion 81 is connected to the top surface of the second voice coil 22, and the outer mounting portion 83 is fixed to the frame 1. The centering support sheet 8 can play a role in correcting deviation, and can effectively improve the polarization and rolling vibration phenomena of the voice coil assembly.

Optionally, the centering support piece 8 is provided with a conducting circuit, the conducting circuit includes a first bonding pad, a conducting wire and a second bonding pad which are sequentially connected, the first bonding pad is arranged on the inner mounting portion 81, and the second bonding pad is arranged on the outer mounting portion 83 and is exposed; the number of the conducting lines is four, two first bonding pads are connected and conducted with the first voice coil 21, and the other two first bonding pads are connected and conducted with the second voice coil 22. In other embodiments, the first voice coil 21/the second voice coil 22 may be electrically connected to an external power source through a suspension wire. The first voice coil 21 and the second voice coil 22 are different in size, and the welding positions of the first voice coil 21 and the first welding pad on the centering support 8 can be staggered, so that welding of the lead wire and the first welding pad is facilitated.

Preferably, the inner mounting portion 81 is in a ring frame shape, so that not only the structural stability of the centering support piece 8 can be improved and the transportation and assembly of the centering support piece 8 are facilitated, but also the bonding stability of the centering support piece 8 with the first voice coil 21 and the second voice coil 22 can be ensured. In this embodiment, the cantilever portions 82 are connected to four corners of the inner mounting portion 81, respectively, and the second pads are connected to each cantilever portion 82.

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;

2. A micro-speaker as claimed in claim 1, wherein: the magnetic circuit assembly comprises a yoke, a central magnetic structure and a side magnetic structure, wherein the central magnetic structure and the side magnetic structure are respectively arranged on the yoke, the side magnetic structure surrounds the central magnetic structure, and a magnetic gap is formed between the central magnetic structure and the side magnetic structure.

3. A micro-speaker as claimed in claim 2, wherein: the basin stand is connected with the yoke and/or the side magnetic structure.

4. A micro-speaker as claimed in claim 2, wherein: the central magnetic structure comprises a first central magnetic steel, a first central washer, a second central magnetic steel and a second central washer which are sequentially connected in a laminated manner from bottom to top; the side magnetic structure comprises a plurality of groups of magnetic components, wherein the magnetic components comprise a first side magnetic steel, a first side washer, a second side magnetic steel and a second Bian Huasi which are sequentially laminated and connected from bottom to top; the first voice coil is located above the second voice coil, the magnetic gap comprises a first gap and a second gap which are communicated, the first gap is located above the second gap, the first voice coil is arranged corresponding to the first gap, and the second voice coil is arranged corresponding to the second gap.

5. A micro-speaker as claimed in claim 4, wherein: the first voice coil and the second voice coil are respectively rectangular frame-shaped, the length of the first voice coil is smaller than that of the second voice coil, and the width of the first voice coil is smaller than that of the second voice coil.

6. A micro-speaker as claimed in claim 4, wherein: two adjacent second Bian Huasi are connected by a connecting arm, and a plurality of second Bian Huasi are connected by the connecting arm to form a ring frame structure.

7. A micro-speaker as claimed in claim 4, wherein: the voice coil assembly is characterized by further comprising a centering support piece, wherein the centering support piece is connected with the voice coil assembly and the basin frame.

8. A micro-speaker as claimed in claim 7, wherein: the centering support piece comprises an inner mounting portion, a cantilever portion and an outer mounting portion, the top surface of the inner mounting portion is connected with the bottom surface of the first voice coil, the bottom surface of the inner mounting portion is connected with the top surface of the second voice coil, and the outer mounting portion is fixed on the basin frame.

9. A micro-speaker as claimed in claim 8, wherein: the centering support piece is provided with a conducting circuit, the conducting circuit comprises a first bonding pad, a conductive wiring and a second bonding pad which are sequentially connected, the first bonding pad is arranged on the inner mounting part, and the second bonding pad is arranged on the outer mounting part and is exposed; the number of the conducting circuits is four, two first bonding pads are connected and conducted with the first voice coil, and the other two first bonding pads are connected and conducted with the second voice coil.

10. A micro-speaker as claimed in claim 9, wherein: the inner mounting part is in a ring frame shape.