CN220965139U

CN220965139U - Miniature loudspeaker

Info

Publication number: CN220965139U
Application number: CN202322496632.9U
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 stand, 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 comprises a yoke iron and a side magnetic structure, a hollow convex hull protruding towards the direction close to the vibrating diaphragm assembly is arranged in the central area of the yoke iron, the side magnetic structure is arranged around the hollow convex hull, and a magnetic gap for the voice coil assembly to move is formed between the side magnetic structure and the hollow convex hull. The micro-speaker has simple and novel structure, the first voice coil and the second voice coil are respectively and independently controlled, the good electric control performance is realized, the nonlinear phenomenon of the micro-speaker can be improved, and the micro-speaker has better transient performance. The magnetic steel is less in dosage, the magnetic circuit component is simple in structure, and the miniature loudspeaker is convenient to produce and assemble.

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 comprises a yoke and a side magnetic structure, a hollow convex hull protruding towards the direction close to the vibrating diaphragm assembly is arranged in the central area of the yoke, the side magnetic structure surrounds the hollow convex hull, and a magnetic gap for the voice coil assembly to move is formed between the side magnetic structure and the hollow convex hull.

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

In an embodiment, 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 stacked and connected from bottom to top; the first voice coil is located the top of second voice coil, the magnetic gap is including first clearance and the second clearance that is linked together, the second limit magnet steel with form between the cavity convex closure first clearance, the first voice coil corresponds to first clearance setting, the first limit magnet steel with form between the cavity convex closure second clearance, the second voice coil corresponds to the second clearance setting.

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.

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, the peripheral wall of the hollow convex hull is of a step structure, the partial area of the inner mounting portion and the first gap are located above a step surface of the step structure, and the second gap is located outside the bottom of the step structure.

The utility model has the beneficial effects that: the miniature loudspeaker is simple and novel in structure, the first voice coil and the second voice coil are controlled independently, good electrical control performance is achieved, under normal conditions, the first voice coil and the second voice coil move in the same direction, stronger driving force is provided for the vibrating diaphragm assembly, when the external detection module detects that the miniature loudspeaker is resonant or resonates, the external power supply can control current of the first voice coil or the second voice coil to flow reversely, and therefore nonlinear phenomenon of the miniature loudspeaker is improved, and the miniature loudspeaker has better transient performance. The setting of cavity convex closure can replace the central magnetic structure that needs to set up in the original magnetic circuit subassembly, can reduce the quantity of magnet steel, has alleviateed micro-speaker's whole weight, has reduced micro-speaker's manufacturing cost, simultaneously, owing to need not to set up central magnetic structure, is favorable to simplifying micro-speaker's packaging process, improves micro-speaker's production efficiency.

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; 41. hollow convex hulls; 42. a top plate; 43. a step structure; 431. a step; 432. a step surface;

5. A side magnetic structure; 51. a first side magnetic steel; 52. a first side washer; 53. a second side magnetic steel; 54. second Bian Huasi;

6. a magnetic gap; 61. a first gap; 62. a second gap;

7. Centering support pieces; 71. an inner mounting portion; 72. a cantilever portion; 73. 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, the magnetic circuit assembly comprises a yoke 4 and a side magnetic structure 5, the basin frame 1 is connected with the yoke 4 and/or the side magnetic structure 5, a hollow convex hull 41 protruding towards the direction close to the vibrating diaphragm assembly 3 is arranged in the central area of the yoke 4, the side magnetic structure 5 is arranged around the hollow convex hull 41, and a magnetic gap 6 for the voice coil assembly to move is formed between the side magnetic structure 5 and the hollow convex hull 41. Optionally, the hollow convex hull 41 is stamped and formed.

The side magnetic structure 5 comprises a plurality of groups of magnetic components, the magnetic components comprise a first side magnetic steel 51, a first side washer 52, a second side magnetic steel 53 and a second Bian Huasi which are sequentially laminated and connected from bottom to top, optionally, the number of the magnetic components is four, and the four sides of the hollow convex hull 41 are respectively provided with the magnetic components correspondingly; the first voice coil 21 is located above the second voice coil 22, the magnetic gap 6 includes a first gap 61 and a second gap 62 that are communicated, the first gap 61 is formed between the second side magnetic steel 53 and the hollow convex hull 41, the first voice coil 21 is disposed corresponding to the first gap 61, the second gap 62 is formed between the first side magnetic steel 51 and the hollow convex hull 41, and the second voice coil 22 is disposed corresponding to the second gap 62.

In order to facilitate the processing and assembly and improve the magnetic circuit of the micro-speaker, it is preferable that two adjacent second Bian Huasi s 54 are connected by a connecting arm, a plurality of second Bian Huasi are connected by the connecting arm to form a ring frame structure, and it is preferable that the second Bian Huasi and the connecting arm are integrally formed into 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 7, wherein the centering support 7 connects the voice coil assembly with the basin stand 1. Specifically, the centering support 7 includes an inner mounting portion 71, a cantilever portion 72, and an outer mounting portion 73, wherein the top surface of the inner mounting portion 71 is connected to the bottom surface of the first voice coil 21, the bottom surface of the inner mounting portion 71 is connected to the top surface of the second voice coil 22, and the outer mounting portion 73 is fixed to the frame 1. The centering support sheet 7 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 7 is provided with a conducting circuit, the conducting circuit includes a first bonding pad, a conducting wire and a second bonding pad that are sequentially connected, the first bonding pad is disposed on the inner mounting portion 71, and the second bonding pad is disposed on the outer mounting portion 73 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 7 can be staggered, so that welding of the lead wire and the first welding pad is facilitated.

Preferably, the inner mounting portion 71 is in a ring frame shape, so that not only the structural stability of the centering support 7 can be improved and the transportation and assembly of the centering support 7 are facilitated, but also the bonding stability of the centering support 7 with the first voice coil 21 and the second voice coil 22 can be ensured. In this embodiment, the cantilever portions 72 are connected to four corners of the inner mounting portion 71, respectively, and the second pads are connected to each of the cantilever portions 72.

In this embodiment, the peripheral wall of the hollow convex hull 41 is a step structure 43, the partial area of the inner mounting portion 71 and the first gap 61 are located above the step surface 432 of the step structure 43, and the second gap 62 is located outside the bottom of the step structure 43. The step structure 43 is used to match with the overall contour of the voice coil assembly, so that the magnetic circuit can be more reasonably constructed, and the hollow convex hull 41 can better perform the magnetic conduction function.

In detail, the top plate 42 of the hollow convex hull 41 is substantially aligned with the second Bian Huasi, and the step 431 of the step structure 43 is substantially aligned with the first side washer 52. 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 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 basin stand is connected with the yoke and/or the side magnetic structure.

3. A micro-speaker as claimed in claim 1, wherein: 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 the top of second voice coil, the magnetic gap is including first clearance and the second clearance that is linked together, the second limit magnet steel with form between the cavity convex closure first clearance, the first voice coil corresponds to first clearance setting, the first limit magnet steel with form between the cavity convex closure second clearance, the second voice coil corresponds to the second clearance setting.

4. A micro-speaker as claimed in claim 3, 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.

5. A micro-speaker as claimed in claim 3, 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.

6. A micro-speaker as claimed in claim 5, 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.

7. A micro-speaker as claimed in claim 6, 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.

8. A micro-speaker as claimed in claim 6, wherein: the inner mounting part is in a ring frame shape.

9. A micro-speaker as claimed in claim 6, 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.

10. A micro-speaker as claimed in claim 9, wherein: the periphery wall of the hollow convex hull is of a step structure, a partial area of the inner installation part and the first gap are located above a step surface of the step structure, and the second gap is located outside the bottom of the step structure.