CN223967971U

CN223967971U - Miniature speaker

Info

Publication number: CN223967971U
Application number: CN202520214500.9U
Authority: CN
Inventors: 张文华; 农家权
Original assignee: Shenzhen Weishi Acoustics Co Ltd
Current assignee: Shenzhen Weishi Acoustics Co Ltd
Priority date: 2025-02-10
Filing date: 2025-02-10
Publication date: 2026-03-03
Anticipated expiration: 2035-02-10

Abstract

This utility model discloses a miniature loudspeaker, including a frame, a magnetic circuit assembly, and a vibration assembly. The magnetic circuit assembly includes a magnetic cover, a yoke, and a central magnetic structure and a side magnetic structure respectively disposed on the yoke. The side magnetic structure is connected to the frame, and a first magnetic gap is formed between the side magnetic structure and the central magnetic structure. The central magnetic structure includes a first central magnet, a first central washer, a second central magnet, a second central washer, and a third central magnet stacked sequentially from bottom to top. The magnetic cover includes a top plate and a surrounding wall, and a second magnetic gap is formed between the surrounding wall and the central magnetic structure. The vibration assembly includes a diaphragm, a dome, a first voice coil, and a second voice coil. The diaphragm includes an inner folded ring portion, a connecting portion, an outer folded ring portion, and an outer fixing portion. The outer fixing portion is connected to the frame, the inner folded ring portion is connected to the surrounding wall, and the dome is connected to the connecting portion. The first voice coil is located at the first magnetic gap and connected to the dome, and the second voice coil is located at the second magnetic gap and connected to the dome. This miniature loudspeaker exhibits excellent performance and requires a small installation area.

Description

Micro-speaker

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 development of miniaturization of these portable electronic devices, the size and performance requirements of the miniature electroacoustic devices applied therein are increasing, and at the same time, larger driving forces are required under the condition of smaller size.

The micro-speaker with the dual-voice coil structure can provide a larger driving force, but in the existing micro-speaker with the dual-voice coil structure, two voice coils are arranged side by side, which results in a larger installation area of the micro-speaker with the dual-voice coil structure.

Disclosure of utility model

The utility model solves the technical problem of providing a high-performance micro-speaker with small required installation area.

In order to solve the technical problems, the utility model adopts the technical scheme that the micro loudspeaker comprises:

A basin stand;

The magnetic circuit assembly comprises a magnetic cover, 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 is connected with the basin frame, a first magnetic gap is formed between the side magnetic structure and the central magnetic structure, the central magnetic structure comprises a first central magnetic steel, a first central washer, a second central magnetic steel, a second central washer and a third central magnetic steel which are sequentially stacked and connected from bottom to top, the magnetic cover comprises a top plate and a surrounding wall which is bent and extended downwards from the edge of the top plate, and a second magnetic gap is formed between the surrounding wall and the central magnetic structure;

The vibrating assembly comprises a sound membrane, a top ball, a first voice coil and a second voice coil, wherein the sound membrane comprises an inner folded ring part, a connecting part, an outer folded ring part and an outer fixing part which are sequentially connected from inside to outside, the outer fixing part is connected with the basin frame, the inner edge of the inner folded ring part is connected with the surrounding wall, the top ball is connected with the connecting part, the first voice coil is positioned at a first magnetic gap and connected with the bottom surface of the top ball, and the second voice coil is positioned at a second magnetic gap and connected with the top surface of the top ball.

In an embodiment, the sound membrane further comprises an inner fixing portion in a ring frame shape, the outer edge of the inner fixing portion is connected with the inner edge of the inner folded ring portion, and the inner edge of the inner folded ring portion is indirectly connected with the surrounding wall through the inner fixing portion.

In one embodiment, the inner fixing portion is fixedly connected with the bottom surface and/or the outer wall surface of the surrounding wall.

In an embodiment, the side magnetic structure comprises side magnetic steel and Bian Huasi, the side magnetic steel connects the yoke iron and the Bian Huasi, the whole side magnetic structure is in a continuous annular frame shape, or the number of the side magnetic structures is multiple, and the center magnetic structure is located between at least one group of two side magnetic structures which are oppositely arranged.

In an embodiment, the Bian Huasi is disposed corresponding to the first central washer.

In one embodiment, the bottom surface of the enclosure wall is disposed below or flush with the top surface of the second central washer.

In one embodiment, the bottom surface of the enclosure wall is disposed higher or flush than the bottom surface of the second central washer.

In an embodiment, the inner fold ring portion is convex in a direction away from the yoke, and the outer fold ring portion is concave in a direction toward the yoke.

In an embodiment, the dimensions of the first voice coil are the same as or different from the dimensions of the second voice coil.

In an embodiment, the device further comprises a support assembly, wherein the support assembly connects the basin frame and the first voice coil, and the support assembly comprises a centering support piece and/or a secondary membrane.

The miniature loudspeaker has the beneficial effects that the miniature loudspeaker is novel in structure, the two voice coils are arranged up and down by adopting the double-voice-coil framework, under the condition that each of the two voice coils is provided with one magnetic loop, the two magnetic loops interact, the moving directions of the two voice coils are consistent, the driving force of the vibration assembly is improved to a greater extent, the acoustic performance of the miniature loudspeaker is better, and in addition, the two voice coils are arranged up and down, so that the mounting area of the miniature loudspeaker can be smaller, and the development trend of miniature portable electronic equipment can be met.

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

fig. 3 is a schematic structural diagram of an internal structure of a micro-speaker according to a first embodiment of the present utility model.

Reference numerals illustrate:

1. A basin stand;

2. Magnetic circuit components, 21, yokes, 22, a central magnetic structure, 221, a first central magnetic steel, 222, a first central washer, 223, a second central magnetic steel, 224, a second central washer, 225, a third central magnetic steel, 23, a side magnetic structure, 231, a side magnetic steel, 232, bian Huasi, 24, a magnetic cover, 241, a top plate, 242 and a surrounding wall;

3. Vibration component 31, sound film 311, internal fixing part 312, internal folding ring part 313, connecting part 314, external folding ring part 314, external fixing part 32, ball top 33, first voice coil 34, second voice coil;

4. And a support assembly.

Detailed Description

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

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the embodiment of the present utility model, directional indications such as up, down, left, right, front, and rear are referred to, and the directional indication is merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture such as that shown in the drawings, and if the specific posture is changed, the directional indication is correspondingly changed.

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, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between 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, in a first embodiment of the present utility model, a micro speaker includes a frame 1, a magnetic circuit assembly 2 and a vibration assembly 3, the magnetic circuit assembly 2 includes a magnetic cover 24, a yoke 21, and a central magnetic structure 22 and a side magnetic structure 23 respectively disposed on the yoke 21, the side magnetic structure 23 is connected to the frame 1, a first magnetic gap is formed between the side magnetic structure 23 and the central magnetic structure 22, the central magnetic structure 22 includes a first central magnetic steel 221, a first central washer 222, a second central magnetic steel 223, a second central washer 224 and a third central magnetic steel 225 sequentially stacked from bottom to top, the magnetic cover 24 includes a top plate 241 and a peripheral wall 242 extending by bending downward from an edge of the top plate 241, a second magnetic gap is formed between the peripheral wall 242 and the central magnetic structure 22, the vibration assembly 3 includes a diaphragm 31, a dome 32, a first voice coil 33 and a second voice coil 34, the diaphragm 31 includes an inner folded ring 312, a connection part 313 and a second folded ring 314 sequentially connected from inside to outside, the top surface of the diaphragm 31 is connected to the flange 313, the bottom of the diaphragm is located at the flange 32, the bottom of the flange is located at the flange 32, the flange 314 is located at the bottom of the flange 32, and is located at the flange 314 is located at the flange side of the flange 32, and is far from the flange 32.

It is easy to understand that the magnetic pole orientation of the first central magnetic steel 221 is opposite to the magnetic pole orientation of the second central magnetic steel 223, and the magnetic pole orientation of the second central magnetic steel 223 is opposite to the magnetic pole orientation of the third central magnetic steel 225.

In order to facilitate the connection between the sound membrane 31 and the magnetic cover 24 and ensure the stability of the operation of the inner folded ring portion 312, in this embodiment, the sound membrane 31 further includes an inner fixing portion 311 having a ring frame shape, the outer edge of the inner fixing portion 311 is connected to the inner edge of the inner folded ring portion 312, and the inner edge of the inner folded ring portion 312 is indirectly connected to the surrounding wall 242 through the inner fixing portion 311, that is, the inner fixing portion 311 is connected to the surrounding wall 242.

Alternatively, the inner fixing portion 311 is adhesively connected to the bottom surface of the surrounding wall 242, in this embodiment, the inner fixing portion 311 is adhesively connected to the bottom surface of the surrounding wall 242, in other embodiments, the inner fixing portion 311 may be fixedly connected to the outer wall surface of the surrounding wall 242, and it is also possible to connect the bottom surface and the outer wall surface of the surrounding wall 242 at the same time by the inner fixing portion 311.

The side magnetic structure 23 includes side magnetic steels 231 and Bian Huasi, 232, the side magnetic steel 231 connects the yoke 21 and the Bian Huasi, in some embodiments, the side magnetic structure 23 is in a continuous annular frame shape, and in one or more embodiments, the number of the side magnetic structures 23 is plural, and the center magnetic structure 22 is located between at least one set of two side magnetic structures 23 that are disposed opposite to each other. In this embodiment, the number of the side magnetic structures 23 is four, the central magnetic structure 22 is substantially rectangular, and the four sides of the central magnetic structure 22 are respectively provided with the side magnetic structures 23.

To improve the magnetic force utilization, it is preferable that Bian Huasi 232,232 be disposed corresponding to the first central washer 222, and that the bottom surface of the surrounding wall 242 be disposed lower than or flush with the top surface of the second central washer 224. In order for the vibration assembly 3 to have sufficient amplitude to ensure the acoustic performance of the micro-speaker, it is preferable that the bottom surface of the enclosure wall 242 is disposed higher or flush than the bottom surface of the second central washer 224.

In this embodiment, the size of the first voice coil 33 is the same as the size of the second voice coil 34, and in other embodiments, the size of the first voice coil 33 and the size of the second voice coil 34 may be different.

In order to share the load of the dome 32 and prolong the service life of the micro-speaker and improve the polarization of the micro-speaker, the micro-speaker further comprises a support assembly 4, wherein the support assembly 4 connects the basin frame 1 and the first voice coil 33, the support assembly 4 comprises a centering support piece, and in other embodiments, the support assembly 4 may also be a sub-membrane, or the support assembly 4 is a combination of the centering support piece and the sub-membrane.

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 in that: it includes...

Sink stand;

A magnetic circuit assembly includes a magnetic cover, a yoke, and a central magnetic structure and a side magnetic structure respectively disposed on the yoke. The side magnetic structure is connected to the basket frame, and a first magnetic gap is formed between the side magnetic structure and the central magnetic structure. The central magnetic structure includes a first central magnet, a first central washer, a second central magnet, a second central washer, and a third central magnet stacked and connected sequentially from bottom to top. The magnetic cover includes a top plate and a surrounding wall that bends downward from the edge of the top plate, and a second magnetic gap is formed between the surrounding wall and the central magnetic structure.

A vibration assembly includes a diaphragm, a dome, a first voice coil, and a second voice coil. The diaphragm includes an inner folded ring portion, a connecting portion, an outer folded ring portion, and an outer fixing portion connected sequentially from the inside to the outside. The outer fixing portion is connected to the frame. The inner edge of the inner folded ring portion is connected to the surrounding wall. The dome is connected to the connecting portion. The first voice coil is located at the first magnetic gap and is connected to the bottom surface of the dome. The second voice coil is located at the second magnetic gap and is connected to the top surface of the dome.

2. The miniature loudspeaker according to claim 1, characterized in that: the diaphragm further includes an inner fixing part in the shape of a ring frame, the outer edge of the inner fixing part is connected to the inner edge of the inner folded ring part, and the inner edge of the inner folded ring part is indirectly connected to the surrounding wall through the inner fixing part.

3. The miniature loudspeaker according to claim 2, wherein the inner fixing part is fixedly connected to the bottom surface and/or outer wall surface of the enclosure.

4. The miniature loudspeaker according to claim 1, characterized in that: the side magnetic structure includes a side magnet and a side washer, the side magnet connects the yoke and the side washer, and the side magnetic structure is in the form of a continuous ring frame; or, the number of side magnetic structures is multiple, and the central magnetic structure is located between at least one set of two oppositely arranged side magnetic structures.

5. The miniature loudspeaker according to claim 4, wherein the edge washer is provided correspondingly to the first center washer.

6. The miniature loudspeaker according to claim 1, wherein the bottom surface of the enclosure is lower than or flush with the top surface of the second central washer.

7. The miniature loudspeaker according to claim 6, wherein the bottom surface of the enclosure is higher than or flush with the bottom surface of the second central washer.

8. The miniature loudspeaker according to claim 1, characterized in that: the inner folded ring portion protrudes outward in a direction away from the yoke, and the outer folded ring portion is concave in a direction closer to the yoke.

9. The miniature loudspeaker according to claim 1, wherein the size of the first voice coil is the same as or different from that of the second voice coil.

10. The miniature loudspeaker according to claim 1, characterized in that: it further includes a support assembly, the support assembly connecting the frame and the first voice coil, the support assembly including a centering support and/or a secondary diaphragm.