CN223666473U

CN223666473U - Miniature loudspeaker

Info

Publication number: CN223666473U
Application number: CN202423067182.2U
Authority: CN
Inventors: 张俊利; 张文华
Original assignee: Shenzhen Weishi Acoustics Co Ltd
Current assignee: Shenzhen Weishi Acoustics Co Ltd
Priority date: 2024-12-11
Filing date: 2024-12-11
Publication date: 2025-12-12
Anticipated expiration: 2034-12-11

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 yoke and a central magnetic structure disposed on the yoke. The central magnetic structure includes a lower central magnet, a central washer, an upper central magnet, and an upper magnetic shield stacked and connected from bottom to top. The bottom of the lower central magnet is connected to the yoke. The upper magnetic shield includes a body, a surrounding wall, and an extending edge. The body is connected to the upper central magnet. The top of the surrounding wall is connected to the edge of the body. The bottom of the surrounding wall bends outward to form an extending edge. The yoke is connected to the frame and has an upwardly protruding ring that surrounds the central magnetic structure and is positioned corresponding to the extending edge. The vibration assembly includes a centrally mounted diaphragm and a voice coil respectively connected to the centrally mounted diaphragm. The diaphragm is connected to the upper magnetic shield and the frame. The voice coil is positioned corresponding to the gap between the surrounding wall and the upper central magnet, and the gap between the protruding ring and the lower central magnet. This miniature loudspeaker has a novel structure and can achieve a large amplitude in an ultra-thin architecture.

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 equipment such as mobile phones, notebook computers and hearing aids, and along with the rapid development of the portable electronic equipment, the requirements of people on micro electroacoustic devices applied to the portable electronic equipment are also higher and higher, and the amplitude of the micro-speaker is gradually increased by 0.65mm from the original 0.2 mm. In addition, the thickness of the micro-speaker is thinner and thinner, and especially, the folding mobile phone adopts an ultrathin architecture, so that the conventional micro-speaker architecture cannot realize large-amplitude design, and the consumer experience is affected.

Disclosure of utility model

The utility model solves the technical problem of providing a large-amplitude ultrathin micro-speaker.

In order to solve the technical problems, the technical scheme adopted by the utility model is that the miniature loudspeaker comprises:

A basin stand;

The magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, the central magnetic structure comprises a lower central magnetic steel, a central washer, an upper central magnetic steel and an upper magnetic conduction cover which are sequentially stacked and connected from bottom to top, the bottom of the lower central magnetic steel is connected with the yoke, the upper magnetic conduction cover comprises a body, a surrounding wall and an extending edge, the body is connected with the upper central magnetic steel, the top end of the surrounding wall is connected with the edge of the body, the bottom end of the surrounding wall is bent and extended outwards to form the extending edge, the yoke is connected with the basin frame, the yoke is provided with a convex ring protruding upwards, and the convex ring surrounds the central magnetic structure and is arranged corresponding to the extending edge;

The vibration component comprises a middle paste and a sound film and a voice coil which are respectively connected with the middle paste, wherein the sound film is connected with the upper magnetic conduction cover and the basin frame, and the voice coil is arranged corresponding to a gap between the surrounding wall and the upper center magnetic steel and a gap between the convex ring and the lower center magnetic steel.

In an embodiment, the sound membrane comprises an inner annular part, an inner folded annular part, a connecting part, an outer folded annular part and an outer annular part which are sequentially connected from inside to outside, wherein the inner annular part is connected with the extension edge, the outer annular part is connected with the basin frame, and the middle paste is connected with the connecting part.

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

In an embodiment, the middle paste comprises a first ring part, a raised part and a second ring part which are sequentially connected, wherein the first ring part is higher than the second ring part, the first ring part is connected with the sound membrane, and the second ring part is connected with the voice coil.

In an embodiment, the second collar portion is connected to a middle region of the voice coil, and the voice coil is disposed corresponding to the central washer.

In an embodiment, the basin stand further comprises a centering support piece, wherein the centering support piece comprises an inner mounting part, a cantilever part and an outer mounting part which are sequentially connected, the inner mounting part is connected with the second ring part, and the outer mounting part is connected with the basin stand.

In an embodiment, the top surface of the convex ring is provided with an avoidance groove for avoiding the centering support piece.

In one embodiment, the inner mounting portion connects a corner, a major axis side or a minor axis side of the voice coil.

In one embodiment, the convex ring is a stamped structure formed by stamping.

In one embodiment, the upper center magnetic steel and the lower center magnetic steel are opposite in magnetic pole orientation.

The miniature loudspeaker has the beneficial effects that the miniature loudspeaker is novel in structure, the magnetic poles of the upper center magnetic steel and the lower center magnetic steel face opposite directions, and the design of the upper magnetic cover is matched, so that the magnetic efficiency can be effectively improved, the BL value of the miniature loudspeaker is improved, the performance of the miniature loudspeaker is improved, and the voice coil can be arranged corresponding to the center washer, so that the displacement of the voice coil in the miniature loudspeaker can be larger, the miniature loudspeaker can realize large amplitude under an ultrathin framework, the development trend of ultrathin electronic equipment is met, and the use experience of consumers is promoted. The convex ring on the yoke forms part of the path of the magnetic loop, so that the components of the micro-speaker are reduced, and the assembly and production of the micro-speaker are facilitated.

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 diagram of a yoke in a micro speaker according to a first embodiment of the present utility model.

Reference numerals illustrate:

1. a basin stand;

2. The yoke iron, the 21, the convex ring, the 211, the avoiding groove;

3. The central magnetic structure, 31, lower central magnetic steel, 32, central washer, 33, upper central magnetic steel, 34, upper magnetic conductive cover, 341, body, 342, surrounding wall, 343 and extension edge;

4. Sound membrane, 41, inner annular part, 42, inner folded annular part, 43, connecting part, 44, outer folded annular part, 45, outer annular part;

5. middle paste, 51, first ring part, 52, lifting part, 53, second ring part;

6. a voice coil;

7. the centering support piece, 71, an inner mounting part, 72, a cantilever part, 73, and an outer mounting part.

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, an embodiment of the utility model is a micro speaker, comprising a frame 1, a magnetic circuit assembly and a vibration assembly, wherein the magnetic circuit assembly comprises a yoke 2 and a central magnetic structure 3 arranged on the yoke 2, the central magnetic structure 3 comprises a lower central magnetic steel 31, a central washer 32, an upper central magnetic steel 33 and an upper magnetic cover 34 which are sequentially stacked and connected from bottom to top, the bottom of the lower central magnetic steel 31 is connected with the yoke 2, the upper central magnetic steel 33 and the lower central magnetic steel 31 are opposite in magnetic pole orientation, the upper magnetic cover 34 comprises a body 341, a surrounding wall 342 and an extension edge 343, the body 341 is connected with the upper central magnetic steel 33, the top end of the surrounding wall 342 is connected with the edge of the body 341, the bottom end of the surrounding wall 342 is bent and extended to form the extension edge 343, the yoke 2 is connected with the frame 1, the yoke 2 is provided with a convex ring 21 which is upwards protruded, the convex ring 21 surrounds the central magnetic structure 3 and is arranged corresponding to the extension edge, the vibration assembly comprises a middle magnetic steel 5 and a diaphragm 342 which is connected with the upper magnetic steel 4 and the central magnetic steel 3, and the diaphragm 4 is arranged corresponding to the gap between the upper magnetic steel 33 and the central magnetic steel 4 and the voice coil 4.

The sound membrane 4 comprises an inner annular portion 41, an inner folded annular portion 42, a connecting portion 43, an outer folded annular portion 44 and an outer annular portion 45 which are sequentially connected from inside to outside, the inner annular portion 41 is connected with the extending edge 343, the outer annular portion 45 is connected with the basin frame 1, and the middle patch 5 is connected with the connecting portion 43.

Preferably, the inner annular portion 41 is connected to the extending edge 343, so that the extending edge 343 not only plays a role in lateral magnetic conduction, but also plays a role in providing an installation position for the inner edge of the inner annular portion 41, and the inner annular portion 41 can ensure that the thickness space of the micro-speaker is not occupied, thereby ensuring the ultra-thin micro-speaker. In other embodiments, it is also possible that the inner annular portion 41 connects the surrounding wall 342 and/or the body 341.

In this embodiment, the inner fold ring portion 42 protrudes in a direction away from the yoke 2, and the outer fold ring portion 44 protrudes in a direction toward the yoke 2. Specifically, the outer folded ring portion 44 is disposed corresponding to the outer area of the convex ring 21, so that the collision between the outer folded ring portion 44 and the convex ring 21 during the operation of the micro-speaker can be avoided, and meanwhile, the outer folded ring portion 44 and the convex ring 21 with the side magnetic structure are dislocated, so that the micro-speaker can be kept ultra-thin.

In this embodiment, the middle paste 5 includes a first ring portion 51, a raised portion 52 and a second ring portion 53 that are sequentially connected, the first ring portion 51 is higher than the second ring portion 53, and the first ring portion 51 and the second ring portion are located at opposite sides of the raised portion 52, the first ring portion 51 is connected with the sound membrane 4, the second ring portion 53 is connected with the voice coil 6, specifically, the first ring portion 51 is connected with the connection portion 43, the second ring portion 53 is connected with a middle area of the voice coil 6, and the voice coil 6 is arranged corresponding to the central washer 32. In other embodiments, the middle patch 5 may be of other types, but the middle patch 5 configured in this way has a larger contact area with the voice coil 6, so that the structural stability of the micro-speaker can be effectively improved.

The micro-speaker further comprises a centering support piece 7, wherein the centering support piece 7 comprises an inner mounting part 71, a cantilever part 72 and an outer mounting part 73 which are sequentially connected, the inner mounting part 71 is connected with the second ring part 53, and the outer mounting part 73 is connected with the basin frame 1.

The inner mounting portion 71 is connected to a corner portion, a long axis side or a short axis side of the voice coil 6, so as to avoid collision between the convex ring 21 and the centering support 7, and an avoidance groove 211 for avoiding the centering support 7 is provided on the top surface of the convex ring 21.

In this embodiment, the convex ring 21 is a stamping structure formed by stamping, and the convex ring 21 formed by stamping is convenient for processing and forming, and can reduce the manufacturing consumable of the yoke 2.

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 micro speaker is characterized by comprising

A basin stand;

2. The micro-speaker of claim 1, wherein the sound membrane comprises an inner annular portion, an inner folded annular portion, a connecting portion, an outer folded annular portion and an outer annular portion which are sequentially connected from inside to outside, the inner annular portion is connected with the extension edge, the outer annular portion is connected with the basin stand, and the middle paste is connected with the connecting portion.

3. The micro-speaker of claim 2, wherein the inner folded ring portion protrudes in a direction away from the yoke, and the outer folded ring portion protrudes in a direction toward the yoke.

4. The micro-speaker of claim 1, wherein the center mount comprises a first ring portion, a raised portion and a second ring portion connected in sequence, the first ring portion is higher than the second ring portion, the first ring portion is connected with the sound membrane, and the second ring portion is connected with the voice coil.

5. The micro-speaker of claim 4, wherein the second collar portion is connected to a central region of the voice coil, the voice coil being disposed corresponding to the central washer.

6. The micro-speaker of claim 4, further comprising a centering pad, wherein the centering pad comprises an inner mounting portion, a cantilever portion, and an outer mounting portion, which are sequentially connected, wherein the inner mounting portion is connected to the second ring portion, and wherein the outer mounting portion is connected to the frame.

7. The micro-speaker of claim 6, wherein the top surface of the collar is provided with a recess for receiving the centering strip.

8. The micro-speaker of claim 6, wherein the inner mounting portion is connected to a corner portion, a major axis side or a minor axis side of the voice coil.

9. The micro-speaker of claim 1, wherein the convex ring is a stamped configuration.

10. The micro-speaker of claim 1, wherein the upper center magnetic steel and the lower center magnetic steel are opposite in magnetic pole orientation.