CN220965136U - Miniature loudspeaker - Google Patents

Abstract

The utility model discloses a miniature loudspeaker, which comprises a basin frame, a first vibration assembly, a second vibration assembly and a magnetic circuit assembly, wherein the first vibration assembly comprises a first vibrating diaphragm assembly and a first voice coil assembly, the first vibrating diaphragm assembly is connected with the first voice coil assembly and the basin frame, the first voice coil assembly comprises a first voice coil and a second voice coil which are connected, and the first voice coil and the second voice coil are mutually and independently controlled by an external power supply; the second vibration assembly comprises a second vibration film assembly and a second voice coil assembly, the second vibration film assembly is connected with the second voice coil assembly and the basin stand, the second voice coil assembly comprises a third voice coil and a fourth voice coil which are connected, and the third voice coil and the fourth voice coil are controlled by an external power supply independently; the yoke of the magnetic circuit assembly is provided with a hollow convex hull, the side magnetic structure is arranged around the hollow convex hull, and the center magnetic structure is arranged in the hollow convex hull. The micro-speaker has novel structure and good electrical control performance, and can effectively improve nonlinear phenomenon of the micro-speaker, so that the micro-speaker has better transient 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 first vibration assembly comprises a first vibrating diaphragm assembly and a first voice coil assembly, the first vibrating diaphragm assembly is connected with the first voice coil assembly and the basin frame, the first voice coil assembly comprises a first voice coil and a second voice coil which are connected with each other, and the first voice coil and the second voice coil are controlled by an external power supply independently;

the second vibration assembly comprises a second vibrating diaphragm assembly and a second voice coil assembly, the second vibrating diaphragm assembly is connected with the second voice coil assembly and the basin frame, the second voice coil assembly comprises a third voice coil and a fourth voice coil which are connected, and the third voice coil and the fourth voice coil are mutually independently controlled by an external power supply;

the magnetic circuit assembly is connected with the basin frame and comprises a yoke, a central magnetic structure 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, the central magnetic structure is arranged in the hollow convex hull, a first magnetic gap for the first voice coil assembly to move is formed between the side magnetic structure and the hollow convex hull, and a second magnetic gap for the second voice coil assembly to move is formed between the central magnetic structure and the hollow convex hull.

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, first 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, first voice coil corresponds to first clearance setting, 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 first centering support, and the first centering support connects the first voice coil assembly and the basin frame.

In an embodiment, the first positioning support piece comprises an inner mounting part, a cantilever part and an outer mounting part, wherein the top surface of the inner mounting part is connected with the bottom surface of the first voice coil, the bottom surface of the inner mounting part is connected with the top surface of the second voice coil, and the outer mounting part is fixed on the basin frame; the first locating support piece is provided with a conducting circuit, the conducting circuit comprises 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 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 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.

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 stacked and connected from top to bottom, and the top surface of the first central magnetic steel is connected with the top plate of the hollow convex hull; the third voice coil is located above the fourth voice coil, the second magnetic gap comprises a third gap and a fourth gap which are communicated, the third gap is formed between the first central magnetic steel and the hollow convex hull, the third voice coil is arranged corresponding to the third gap, the fourth gap is formed between the second central magnetic steel and the hollow convex hull, and the fourth voice coil is arranged corresponding to the fourth gap.

In an embodiment, the width dimension of the second central washer is greater than the width dimension of the first central washer, and the length dimension of the second central washer is greater than the length dimension of the first central washer.

In an embodiment, the voice coil assembly further comprises a second centering strut, and the second centering strut connects the second voice coil assembly and the yoke.

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, the third voice coil and the fourth voice coil are respectively and independently controlled, the miniature loudspeaker has good electric control performance, under normal conditions, the first voice coil and the second voice coil move in the same direction, and the third voice coil and the fourth voice coil move in the same direction, so that stronger driving force is provided for the vibrating diaphragm assembly, when the external detection module detects the miniature loudspeaker, the external power supply can control the current of the first voice coil, the second voice coil, the third voice coil or the fourth voice coil to reversely flow, and thus the nonlinear phenomenon of the miniature loudspeaker is improved, and the miniature loudspeaker has better transient 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 diagram of a yoke in a micro speaker according to an embodiment of the present utility model;

Fig. 3 is a schematic structural diagram of a first positioning support in a micro-speaker according to a first embodiment of the present utility model.

Reference numerals illustrate:

1. A basin stand;

21. A first voice coil; 22. a second voice coil; 23. a third voice coil; 24. a fourth voice coil;

31. a first diaphragm assembly; 32. a second 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;

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

7. A first centering support; 71. an inner mounting portion; 72. a cantilever portion; 73. an outer mounting portion;

8. A central magnetic structure; 81. a first center magnetic steel; 82. a first central washer; 83. a second center magnetic steel; 84. a second central washer;

9. And a second centering support.

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 to 3, a first embodiment of the present 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 first vibration component, a second vibration component and a magnetic circuit component, wherein the first vibration component comprises a first vibrating diaphragm component 31 and a first voice coil component, the first vibrating diaphragm component 31 is connected with the first voice coil component and the basin frame 1, the first voice coil component comprises a first voice coil 21 and a second voice coil 22 which are connected, and the first voice coil 21 and the second voice coil 22 are controlled by an external power supply in a mutually independent mode; the second vibration assembly comprises a second vibration film assembly 32 and a second voice coil assembly, the second vibration film assembly 32 is connected with the second voice coil assembly and the basin frame 1, the second voice coil assembly comprises a third voice coil 23 and a fourth voice coil 24 which are connected, and the third voice coil 23 and the fourth voice coil 24 are controlled by an external power supply independently; the magnetic circuit assembly is connected with the basin frame 1, the magnetic circuit assembly comprises a yoke 4, a central magnetic structure 8 and a side magnetic structure 5, a hollow convex hull 41 protruding towards the direction close to the vibrating diaphragm assembly is arranged in the central area of the yoke 4, the side magnetic structure 5 is arranged around the hollow convex hull 41, the central magnetic structure 8 is arranged in the hollow convex hull 41, a first magnetic gap 61 for the first voice coil assembly to move is formed between the side magnetic structure 5 and the hollow convex hull 41, and a second magnetic gap 62 for the second voice coil assembly to move is formed between the central magnetic structure 8 and the hollow convex hull 41. Optionally, the hollow convex hull 41 is stamped and formed.

Specifically, the basin stand 1 comprises a first support and a second support, the first support and/or the second support are/is connected with the magnetic circuit assembly, the first vibrating diaphragm assembly 31 is connected with the first support, and the second vibrating diaphragm assembly 32 is connected with the second support. More specifically, the bottom surface of the second bracket is disposed lower than the bottom surface of the yoke 4, so that a sufficient space is provided for the vibration of the second diaphragm assembly 32.

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 diaphragm assembly 31 is connected to the first voice coil 21, the first voice coil 21 is located above the second voice coil 22, the first magnetic gap 61 includes a first gap and a second gap that are communicated, the second side magnetic steel 53 and the hollow convex hull 41 form the first gap therebetween, the first voice coil 21 is disposed corresponding to the first gap, the first side magnetic steel 51 and the hollow convex hull 41 form the second gap therebetween, and the second voice coil 22 is disposed corresponding to the second gap.

The central magnetic structure 8 comprises a first central magnetic steel 81, a first central washer 82, a second central magnetic steel 83 and a second central washer 84 which are sequentially stacked and connected from top to bottom, and the top surface of the first central magnetic steel 81 is connected with the top plate 42 of the hollow convex hull 41; the third voice coil 23 is located above the fourth voice coil 24, the second magnetic gap 62 includes a third gap and a fourth gap that are communicated, the third gap is formed between the first central magnetic steel 81 and the hollow convex hull 41, the third voice coil 23 is disposed corresponding to the third gap, the fourth gap is formed between the second central magnetic steel 83 and the hollow convex hull 41, the fourth voice coil 24 is disposed corresponding to the fourth gap, and the bottom of the fourth voice coil 24 is connected with the second diaphragm assembly 32.

In detail, the top plate 42 of the hollow convex hull 41 is substantially aligned with the second Bian Huasi, the step 431 of the step structure 43 is substantially aligned with the first side washer 52, the first center washer 82 is substantially aligned with the step 431 of the step structure 43, and the second center washer 84 is substantially aligned with the yoke 4. 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. Similarly, the third voice coil 23 and the fourth voice coil 24 are respectively rectangular, the length of the third voice coil 23 is smaller than the length of the fourth voice coil 24, and the width of the third voice coil 23 is smaller than the width of the fourth voice coil 24.

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 first centering support 7, and the first centering support 7 is connected with the first voice coil assembly and the basin frame 1. Specifically, the first centering support 7 includes an inner mounting portion 71, a cantilever portion 72, and an outer mounting portion 73, wherein a top surface of the inner mounting portion 71 is connected to a bottom surface of the first voice coil 21, a bottom surface of the inner mounting portion 71 is connected to a top surface of the second voice coil 22, and the outer mounting portion 73 is fixed to the frame 1; the first locating support piece 7 can play a role in correcting deviation, and can effectively improve the polarization and rolling vibration phenomena of the first voice coil assembly.

Optionally, a conducting circuit is provided on the first positioning support 7, and the conducting circuit includes a first bonding pad, a conductive trace and a second bonding pad that are sequentially connected, where the first bonding pad is provided on the inner mounting portion 71, and the second bonding pad is provided 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 pads on the first positioning support piece 7 can be staggered, so that welding of the lead wires and the first welding pads is facilitated.

Preferably, the inner mounting portion 71 is in a ring frame shape, so that not only the structural stability of the first centering support 7 can be improved and the transportation and assembly of the first centering support 7 are facilitated, but also the bonding stability of the first 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 are located above a step surface 432 of the step structure 43, and the second gap is located outside the bottom of the step structure 43. The step structure 43 is used to match with the overall contour of the first voice coil assembly/the second voice coil assembly, so that the magnetic circuit can be constructed more reasonably, and the hollow convex hull 41 can better perform the magnetic conduction function.

The second central washer 84 has a width dimension greater than the width dimension of the first central washer 82, and the second central washer 84 has a length dimension greater than the length dimension of the first central washer 82. The large-sized second center washer 84 may exert a better magnetic conduction effect, facilitating further improvement of performance of the micro-speaker.

Optionally, the micro-speaker further comprises a second centering support 9, and the second centering support 9 connects the second voice coil assembly with the yoke 4. The second centering support 9 plays a role in rectifying the second voice coil assembly.

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 (10)

1. A miniature loudspeaker, characterized by: comprising

A basin stand;

The first vibration assembly comprises a first vibrating diaphragm assembly and a first voice coil assembly, the first vibrating diaphragm assembly is connected with the first voice coil assembly and the basin frame, the first voice coil assembly comprises a first voice coil and a second voice coil which are connected with each other, and the first voice coil and the second voice coil are controlled by an external power supply independently;

the second vibration assembly comprises a second vibrating diaphragm assembly and a second voice coil assembly, the second vibrating diaphragm assembly is connected with the second voice coil assembly and the basin frame, the second voice coil assembly comprises a third voice coil and a fourth voice coil which are connected, and the third voice coil and the fourth voice coil are mutually independently controlled by an external power supply;

the magnetic circuit assembly is connected with the basin frame and comprises a yoke, a central magnetic structure 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, the central magnetic structure is arranged in the hollow convex hull, a first magnetic gap for the first voice coil assembly to move is formed between the side magnetic structure and the hollow convex hull, and a second magnetic gap for the second voice coil assembly to move is formed between the central magnetic structure and the hollow convex hull.

2. 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, first 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, first voice coil corresponds to first clearance setting, first limit magnet steel with form between the cavity convex closure second clearance, the second voice coil corresponds to the second clearance setting.

3. A micro-speaker as claimed in claim 2, 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.

4. A micro-speaker as claimed in claim 2, wherein: the voice coil assembly also comprises a first centering support piece, wherein the first centering support piece is connected with the first voice coil assembly and the basin frame.

5. A micro-speaker as claimed in claim 4, wherein: the first positioning support piece comprises an inner mounting part, a cantilever part and an outer mounting part, the top surface of the inner mounting part is connected with the bottom surface of the first voice coil, the bottom surface of the inner mounting part is connected with the top surface of the second voice coil, and the outer mounting part is fixed on the basin frame; the first locating support piece is provided with a conducting circuit, the conducting circuit comprises 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 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.

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

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

8. A micro-speaker as claimed in claim 7, 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 stacked and connected from top to bottom, and the top surface of the first central magnetic steel is connected with the top plate of the hollow convex hull; the third voice coil is located above the fourth voice coil, the second magnetic gap comprises a third gap and a fourth gap which are communicated, the third gap is formed between the first central magnetic steel and the hollow convex hull, the third voice coil is arranged corresponding to the third gap, the fourth gap is formed between the second central magnetic steel and the hollow convex hull, and the fourth voice coil is arranged corresponding to the fourth gap.

9. A micro-speaker as claimed in claim 8, wherein: the width dimension of the second central washer is larger than that of the first central washer, and the length dimension of the second central washer is larger than that of the first central washer.

10. A micro-speaker as claimed in claim 8, wherein: the voice coil assembly further comprises a second centering support piece, and the second centering support piece is connected with the second voice coil assembly and the yoke.