CN223231316U

CN223231316U - A miniature speaker

Info

Publication number: CN223231316U
Application number: CN202422293337.8U
Authority: CN
Inventors: 许飞龙; 张俊利; 张文华
Original assignee: Shenzhen Weishi Acoustics Co Ltd
Current assignee: Shenzhen Weishi Acoustics Co Ltd
Priority date: 2024-09-19
Filing date: 2024-09-19
Publication date: 2025-08-15
Anticipated expiration: 2034-09-19

Abstract

The utility model discloses a miniature loudspeaker comprising a housing, a diaphragm assembly, an elastic frame, a voice coil, a spring, and two sets of magnetic steel assemblies. The housing has windows at the top and bottom, respectively. The housing also has diaphragm assemblies at the top and bottom, respectively, which close the windows. The magnetic steel assembly is disposed within the housing, with the two sets of magnetic steel assemblies positioned near each end of the housing. Each set of magnetic steel assemblies includes an upper magnet and a lower magnet with opposite magnetic poles, forming a magnetic gap between the upper and lower magnets. The elastic frame includes an annular deformable body and mounting arms, connecting the two diaphragm assemblies. Mounting arms are connected to both sides of the annular deformable body, with the ends of the mounting arms distal to the annular deformable body extending into the magnetic gap. A voice coil is wound around each mounting arm. A spring connects the ends of the mounting arms to the housing, with the spring's expansion and contraction direction aligning with the length of the mounting arms. This miniature loudspeaker has a simple, novel structure and excellent performance.

Description

Miniature loudspeaker

Technical Field

The utility model relates to the technical field of electroacoustic converters, in particular to a miniature loudspeaker.

Background

Currently, a micro speaker plays an indispensable role as an audio device in mobile terminals such as mobile phones, tablet computers, and the like. With the development of the times, consumers have higher and higher requirements on the tone quality and the loudness of the whole machine, and the performance of the micro-speaker is required to be further improved, so that the micro-speaker with double-sided vibration sounding appears on the market, but the existing micro-speaker with double-sided vibration sounding has the problems of numerous component parts and complex structure.

Disclosure of utility model

The utility model solves the technical problem of providing the high-performance micro-speaker with a simple structure.

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

The box body is provided with windows at the top and the bottom respectively;

The vibrating diaphragm assembly is arranged at the top and the bottom of the box body respectively, and the vibrating diaphragm assembly seals the open window;

The two groups of magnetic steel components are arranged in the box body, the two groups of magnetic steel components are respectively arranged close to two ends of the box body, each group of magnetic steel components comprises upper magnetic steel and lower magnetic steel with opposite magnetic pole directions, and a magnetic gap is formed between the upper magnetic steel and the lower magnetic steel;

The elastic framework comprises an annular deformation body and mounting arms, the annular deformation body is connected with the two vibrating diaphragm assemblies, the mounting arms are respectively connected to two sides of the annular deformation body, and one end, far away from the annular deformation body, of each mounting arm stretches into the magnetic gap;

the voice coils are respectively wound on each mounting arm;

And the spring is connected with the mounting arm and the box body, and the expansion direction of the spring is consistent with the length direction of the mounting arm.

In one embodiment, the mounting arms on either side of the annular deformation body are arranged coplanar.

In an embodiment, the annular deformation body comprises two arc-shaped arms which are oppositely arranged, the mounting arms are connected with the arc-shaped arms, the top ends of the two arc-shaped arms are connected through an upper flat plate part, the upper flat plate part is connected with the vibrating diaphragm assembly positioned at the top of the box body, the bottom ends of the two arc-shaped arms are connected through a lower flat plate part, and the lower flat plate part is connected with the vibrating diaphragm assembly positioned at the bottom of the box body.

In one embodiment, the connection between the mounting arm and the arc arm is located in the middle of the arc arm.

In an embodiment, the elastic framework is an integrally formed one-piece structure.

In an embodiment, the elastic framework is made of metal or plastic.

In an embodiment, the window at the top of the box body is opposite to the window at the bottom of the box body.

In one embodiment, a plurality of said springs are connected to the same said mounting arm.

In an embodiment, a plurality of said springs connected to the same said mounting arm are symmetrically arranged.

In an embodiment, the spring is made of metal, the spring is electrically connected with the voice coil, the box body is provided with a conductive member electrically connected with the spring, and a part of the conductive member is exposed out of the box body.

The miniature loudspeaker has the beneficial effects that the miniature loudspeaker is simple and novel in structure, few in component parts, convenient to produce and manufacture, large in total volume of internal magnetic steel, and capable of enabling all areas of the voice coil to be in an effective magnetic gap, so that the miniature loudspeaker has a very high BL value, and therefore, the miniature loudspeaker has excellent performance and is optimized in hearing. The spring in the miniature loudspeaker not only can play the effect of supporting the installation arm, but also can generate a certain degree of power assistance in the process of the transverse vibration of the voice coil, thereby improving the performance and the working stability of the miniature loudspeaker to a greater extent.

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.

Reference numerals illustrate:

1. a case body;

2. a diaphragm assembly;

3. Elastic framework, 31, annular deformation body, 311, arc-shaped arm, 312, upper plate part, 313, lower plate part, 32, mounting arm;

4. A voice coil;

5. a spring;

6. The magnetic steel assembly comprises 61, upper magnetic steel and 62, lower magnetic steel.

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 and 2, in a first embodiment of the present utility model, a micro speaker includes a box 1, a diaphragm assembly 2, an elastic framework 3, a voice coil 4, a spring 5, and two sets of magnetic steel assemblies 6, wherein the top and the bottom of the box 1 are respectively provided with a window, preferably the window at the top of the box 1 is opposite to the window at the bottom of the box 1, the top and the bottom of the box 1 are respectively provided with the diaphragm assembly 2, the diaphragm assembly 2 closes the window, the magnetic steel assemblies 6 are disposed in the box 1, the two sets of magnetic steel assemblies 6 are respectively disposed near two ends of the box 1, each set of magnetic steel assemblies 6 includes an upper magnetic steel 61 and a lower magnetic steel 62 with opposite magnetic poles, a magnetic gap is formed between the upper magnetic steel 61 and the lower magnetic steel 62, the elastic framework 3 includes an annular deformation body 31 and a mounting arm 32, the annular deformation body 31 is connected with the two diaphragm assemblies 2, two sides of the annular deformation body 31 are respectively connected with the mounting arm 32, the mounting arm 32 is far from the annular deformation body 31, the spring 5 is mounted in the direction of the mounting arm 32, and the end of the spring 5 is connected with the end of the mounting arm 32 in the direction of the mounting arm 4, and the end of the spring is respectively wound in the direction of the flexible arm 32.

When the miniature loudspeaker works, the voice coil 4 drives the mounting arms 32 to move along the X-axis direction, and the moving directions of the two mounting arms 32 are opposite, so that the annular deformation body 31 deforms, and then the vibrating diaphragm assembly 2 is driven to move along the Z-axis direction, and the vibration sounding effect is achieved.

In this embodiment, the magnetic poles of the upper magnetic steels 61 in the two sets of magnetic steel assemblies 6 face opposite directions. In detail, in the same set of the magnetic steel assemblies 6, when one end of the upper magnetic steel 61 close to the lower magnetic steel 62 is N-pole, one end of the lower magnetic steel 62 close to the upper magnetic steel 61 is S-pole, and when one end of the upper magnetic steel 61 close to the lower magnetic steel 62 is S-pole, one end of the lower magnetic steel 62 close to the upper magnetic steel 61 is N-pole, and in different sets of the magnetic steel assemblies 6, one end of the upper magnetic steel 61 close to the corresponding magnetic gap is N-pole, and one end of the other upper magnetic steel 61 close to the corresponding magnetic gap is S-pole.

In order to make the annular deformation body 31 more balanced in stress, the mounting arms 32 on both sides of the annular deformation body 31 are arranged coplanar. In this embodiment, the annular deformation body 31 includes two arc-shaped arms 311 that are oppositely disposed, the mounting arm 32 is connected to the arc-shaped arms 311, the top ends of the two arc-shaped arms 311 are connected through an upper plate portion 312, the upper plate portion 312 is connected to the diaphragm assembly 2 that is located at the top of the box body 1, the bottom ends of the two arc-shaped arms 311 are connected through a lower plate portion 313, the lower plate portion 313 is connected to the diaphragm assembly 2 that is located at the bottom of the box body 1, and preferably, the connection portion between the mounting arm 32 and the arc-shaped arms 311 is located at the middle of the arc-shaped arms 311.

For convenient manufacturing of the elastic framework 3 and control of manufacturing cost thereof, the elastic framework 3 is of an integrated structure formed by integrated processing, the elastic framework 3 is easy to deform and has a good stretching rate, and the elastic framework 3 can be made of metal or plastic, and can be specifically selected according to actual needs.

In order to support the mounting arm 32 more effectively, it is preferable that the same mounting arm 32 is connected with a plurality of springs 5, and in order to make the elastic frame 3 more balanced in stress, the plurality of springs 5 connected with the same mounting arm 32 are symmetrically arranged. In this embodiment, three springs 5 are connected to a single mounting arm 32, the spacing between two adjacent springs 5 is equal among the three springs 5, and the springs 5 in the middle are located on the center line of the mounting arm 32.

When the spring 5 is made of metal or plastic, in some embodiments, the spring 5 is electrically connected with the voice coil 4, at this time, the box 1 is provided with a conductive member electrically connected with the spring 5, a part of the conductive member is exposed out of the box 1, and an external power supply supplies power to the voice coil 4 through the conductive member via the spring 5. In other embodiments, the leads of the voice coil 4 may be directly connected to the conductive member, in which case the spring 5 is not required to conduct electrical energy.

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, characterized in that:

A box body, wherein the top and bottom of the box body are respectively provided with windows;

A diaphragm assembly, the top and bottom of the box body are respectively provided with the diaphragm assembly, and the diaphragm assembly closes the window;

Two groups of magnetic steel assemblies, the magnetic steel assemblies being disposed within the box body, the two groups of magnetic steel assemblies being disposed adjacent to two ends of the box body, each group of magnetic steel assemblies comprising an upper magnetic steel and a lower magnetic steel having magnetic poles facing opposite directions, and a magnetic gap being formed between the upper magnetic steel and the lower magnetic steel;

an elastic skeleton, the elastic skeleton comprising an annular deformable body and a mounting arm, the annular deformable body connecting the two diaphragm assemblies, the mounting arms being connected to both sides of the annular deformable body, and the mounting arms extending into the magnetic gap at one end away from the annular deformable body;

a voice coil, each mounting arm being wound with the voice coil;

A spring connects the mounting arm and the box body, and the expansion and contraction direction of the spring is consistent with the length direction of the mounting arm.

2 . The micro-speaker according to claim 1 , wherein the mounting arms located on both sides of the annular deformation body are arranged in the same plane.

3. The micro-speaker according to claim 1 is characterized in that: the annular deformation body includes two arc-shaped arms arranged opposite to each other, the mounting arm is connected to the arc-shaped arms, the top ends of the two arc-shaped arms are connected by an upper flat plate portion, the upper flat plate portion is connected to the diaphragm assembly located at the top of the box body, and the bottom ends of the two arc-shaped arms are connected by a lower flat plate portion, and the lower flat plate portion is connected to the diaphragm assembly located at the bottom of the box body.

4 . The micro-speaker according to claim 3 , wherein the connection between the mounting arm and the arc-shaped arm is located in the middle of the arc-shaped arm.

5 . The micro-speaker according to claim 1 , wherein the elastic frame is an integral structure formed by integral processing.

6 . The micro-speaker according to claim 5 , wherein the elastic skeleton is made of metal or plastic.

7 . The micro-speaker according to claim 1 , wherein the window on the top of the box body and the window on the bottom of the box body are arranged opposite to each other.

8 . The micro-speaker according to claim 1 , wherein a plurality of the springs are connected to the same mounting arm.

9 . The micro-speaker according to claim 8 , wherein the plurality of springs connected to the same mounting arm are symmetrically arranged.

10. The micro-speaker according to claim 1, wherein the spring is made of metal, the spring is electrically connected to the voice coil, the box body is provided with a conductive member electrically connected to the spring, and a portion of the conductive member is exposed outside the box body.