WO2021097993A1

WO2021097993A1 - Sound generating device

Info

Publication number: WO2021097993A1
Application number: PCT/CN2019/126759
Authority: WO
Inventors: 宋威; 邵涛; 陶伟伟
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-11-21
Filing date: 2019-12-19
Publication date: 2021-05-27
Also published as: CN111405422B; CN111372177A; CN111405422A; CN111405423A; CN111372177B; CN111405423B

Abstract

Provided is a sound generating device, which comprises a basin frame, a vibration system supported on the basin frame and a magnetic circuit system having a magnetic gap. The vibration system comprises: a vibration membrane, which comprises a vibration part, a folding ring part that bendingly extends from the periphery of the vibration part, and a fixed part that bendingly extends from the folding ring part and that is fixed to the basin frame; a framework, which comprises a flat panel wall and an extending wall, the flat panel wall being attached to a side of the vibration part near the magnetic circuit system to act as a spherical top structure of the vibration membrane, and the extending wall bendingly extending from the flat panel wall toward the direction away from the vibration membrane; and a voice coil, which is inserted into the magnetic gap and is fixedly connected to the extending wall, the voice coil driving the extending wall to vibrate so as to drive the flat panel wall to vibrate, thereby driving the vibration part to vibrate and generate sound. Compared with the related technology, the sound generating device of the present invention has good acoustic performance and high assembly efficiency.

Description

Sound device

Technical field

The invention relates to the field of electro-acoustic conversion, in particular to a sound-producing device applied to electronic sound box products.

Background technique

The sound device is also known as a speaker or a horn, which is used in a speaker to convert audio signals into sound for playback.

The related art sound generating device includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system with a magnetic gap. The magnetic circuit system drives the vibration system to vibrate and emit sound. The vibration system includes a frame fixed to the basin. The frame is used for vibrating and sounding the diaphragm, attached to the frame on the side of the dome of the diaphragm close to the magnetic circuit system, and the voice coil that is wound around the frame and inserted into the magnetic gap.

technical problem

However, in related art sounding devices, the skeleton is used as a supporting structure to connect the dome and the voice coil. During assembly, the concentricity of the skeleton and the dome needs to be strictly controlled to ensure the acoustic performance, which makes the assembly efficiency low and even reduces the quality of the assembled finished product. rate.

Therefore, it is necessary to provide a new sound generating device to solve the above technical problems.

Technical solutions

The purpose of the present invention is to provide a sound device with good acoustic performance and high assembly efficiency.

In order to achieve the above objective, the present invention provides a sound emitting device, which includes a basin frame, a vibration system supported on the basin frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound, the magnetic circuit system having a magnetic gap, The vibration system includes:

A vibrating membrane, the vibrating membrane comprising a vibrating part, a folding ring part bent and extending from the periphery of the vibrating part, and a fixing part bent and extended by the folding ring part and fixed to the basin frame;

The frame includes a flat wall and an extension wall; the flat wall is attached to the side of the vibrating part close to the magnetic circuit system to serve as the dome structure of the diaphragm, and the extension wall is composed of The flat wall is bent and extended in a direction away from the diaphragm; and,

A voice coil, the voice coil is inserted in the magnetic gap and fixedly connected to the extension wall, and the voice coil drives the extension wall to vibrate to drive the plate wall to vibrate, thereby driving the vibrating part to vibrate and produce sound .

Preferably, the extension wall includes a first extension wall bent and extended from the flat wall in a direction away from the vibrating part of the diaphragm, and bent and extended from the first extension wall in a direction close to the magnetic circuit system The second extension wall abuts against the outer side of the voice coil and forms a fixed connection.

Preferably, the extension wall includes three and is arranged at equal intervals along the extension direction of the flat plate wall.

Preferably, the magnetic circuit system includes a first magnetic bowl, a magnetic steel unit accommodated and fixed in the first magnetic bowl, and a magnetic steel unit that penetrates the first magnetic bowl in a vertical vibration direction and matches the second extension wall Give way

The first magnetic bowl includes a first magnetic bowl bottom wall supported and fixed to the basin frame, and a first magnetic bowl side wall bent and extended from the first magnetic bowl bottom wall in a direction close to the diaphragm, The magnetic steel unit and the side wall of the first magnetic bowl jointly form the magnetic gap;

The relief groove extends along the vibration direction and penetrates the side wall of the first magnetic bowl;

The first extension wall is arranged around the outer side of the magnetic circuit system and arranged at intervals, and the second extension wall extends into the magnetic gap through the relief groove.

Preferably, the basin frame includes a bottom wall, an outer wall bent and extended from the periphery of the bottom wall, and an inner wall bent and extended from the bottom wall. The outer wall is arranged around the inner wall and is spaced apart from each other. There is a through opening through it, and the through opening extends along the vibration direction of the vibration system;

The bottom wall and the inner wall jointly enclose an accommodating space, and the magnetic circuit system is installed in the accommodating space, and the relief groove and the opening are arranged one by one directly opposite;

The first extension wall is ringed on the outer side of the inner wall and arranged at intervals, and the second extension wall sequentially extends into the magnetic gap through the through opening and the relief groove.

Preferably, the magnetic circuit system further includes a second magnetic bowl covering the magnetic steel unit, and the second magnetic bowl is arranged directly opposite to the first magnetic bowl; the second magnetic bowl includes a second magnetic bowl. The bottom wall of the magnetic bowl and the side wall of the second magnetic bowl, the bottom wall of the second magnetic bowl and the bottom wall of the first magnetic bowl are arranged opposite to each other, and the side wall of the second magnetic bowl is formed by the bottom of the second magnetic bowl The wall is bent and extended in a direction close to the bottom wall of the first magnetic bowl, and the relief groove also penetrates the side wall of the second magnetic bowl.

Preferably, the fixing portion of the diaphragm includes a first fixing portion and a second fixing portion; the first fixing portion is ring-shaped and fixed to the outer wall, and the second fixing portion is ring-shaped and fixed On the inner wall;

The folding ring portion includes a first folding ring portion having a ring shape and a second folding ring portion having a ring shape. The first folding ring portion surrounds the second folding ring portion and is spaced apart from each other; The side of the ring portion away from the second folding ring portion is connected to the first fixing portion, and the side of the second folding ring portion away from the first folding ring portion is connected to the second fixing portion;

The vibrating part has a ring shape, the vibrating part is located between the first folding ring part and the second folding ring part, and the outer side of the vibrating part is connected with the first folding ring part, the The inner side of the vibrating part is connected with the second folding ring part;

The flat wall is attached to the side of the vibrating part close to the magnetic circuit system.

Preferably, the vibrating portion is provided with a through hole penetrating therethrough, and the flat plate wall completely covers the through hole.

Preferably, the top surface of the magnetic circuit system is higher than the vibration part in the vibration direction, and the position of the maximum amplitude of the vibration part is lower than the top surface of the magnetic circuit system

Preferably, the vibration system further includes an auxiliary diaphragm, one side of the auxiliary diaphragm is fixed to the outer wall, and the other side is fixed to an end of the first extension wall away from the flat wall.

Beneficial effect

Compared with the related art, in the sound generating device of the present invention, the voice coil is connected to the diaphragm through the skeleton, and the skeleton includes a flat wall and an extension wall, and the flat wall is attached to the vibrating part of the diaphragm The side close to the magnetic circuit system serves as the dome structure of the diaphragm, and the extension wall is bent and extended from the flat wall in a direction away from the diaphragm; the voice coil is inserted in In the magnetic gap and fixedly connected with the extension wall, a suspension support is formed by the extension wall, so that the voice coil drives the extension wall to vibrate to drive the plate wall to vibrate, thereby driving the vibrating part to vibrate and produce sound In the above structure, because the flat wall of the frame acts as the top ball of the diaphragm to radiate sound waves, and the extension part fixes the voice coil, that is, the frame and the diaphragm are integrated, which reduces the fitting error of the assembly between the parts and improves it. Acoustic performance, while simplifying the assembly process and improving production efficiency; In addition, the extension wall of the frame is bonded from the outside of the voice coil, which makes the control of the magnetic gap more flexible and facilitates the design of the structure.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:

FIG. 1 is a schematic diagram of the three-dimensional structure of the sound generating device of the present invention;

Figure 2 is an exploded view of a part of the three-dimensional structure of the sound generating device of the present invention;

Figure 3 is a sectional view taken along the line A-A in Figure 1;

Figure 4 is a schematic diagram of the skeleton three-dimensional structure of the sound generating device of the present invention;

FIG. 5 is a schematic view of the structure of FIG. 4 from another perspective.

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Please refer to FIGS. 1-5 at the same time. The present invention provides a sound generating device 100, which includes a basin frame 1, a vibration system 2 and a magnetic circuit system 3 with a magnetic gap 30. The vibration system 2 and the magnetic circuit system 3 are respectively supported on the basin frame 1, and the magnetic circuit system 3 drives the vibration system 2 to vibrate and produce sound.

In this embodiment, the basin frame 1 includes a bottom wall 11, an outer wall 12 bent and extended from the periphery of the bottom wall 11, and an inner wall 13 bent and extended by the bottom wall 11, and the outer wall 12 surrounds the inner wall. 13 set and spaced apart.

The inner wall 13 is provided with a through opening 131 extending therethrough, and the through opening 131 extends along the vibration direction of the vibration system 2.

The bottom wall 11 and the inner wall 13 jointly enclose a receiving space 10.

The vibration system 2 includes: a diaphragm 21, a skeleton 22, a voice coil 23 and an auxiliary diaphragm 24.

The diaphragm 21 includes a vibrating portion 211, a folding ring portion 212 extending from the periphery of the vibrating portion 211, and a fixing portion 213 bending and extending from the folding ring portion 212 and fixed to the basin frame 1.

In this embodiment, specifically, the fixing portion 213 is used to fix the diaphragm 21 to the frame 1, and includes a first fixing portion 2131 and a second fixing portion 2132; the first fixing portion 2131 is ring-shaped and Fixed to the outer wall 12, the second fixing portion 2132 has a ring shape and is fixed to the inner wall 13.

The folding ring portion 212 is used for improving elastic support and amplitude when the vibrating portion 211 vibrates, and includes a first folding ring portion 2121 in a ring shape and a second folding ring portion 2122 in a ring shape. The first folding ring portion 2121 is arranged around the second folding ring portion 2122 and is spaced apart from each other. The side of the first folding ring portion 2121 away from the second folding ring portion 2122 is connected to the first fixing portion 2131, and the side of the second folding ring portion 2122 away from the first folding ring portion 2121 It is connected to the second fixing portion 2132.

The vibrating part 211 is used to radiate sound waves to produce sound when vibrating. Specifically, the vibrating portion 211 has a ring shape, the vibrating portion 211 is located between the first folding ring portion 2121 and the second folding ring portion 2122, and the outer side of the vibrating portion 211 is connected to the first folding ring portion 2122. A folding ring portion 2121 is connected, and the inner side of the vibrating portion 211 is connected with the second folding ring portion 2122.

The skeleton 22 includes a flat wall 221 and an extension wall 222.

In this embodiment, the flat wall 221 is attached to the side of the vibrating part 211 close to the magnetic circuit system 3 to serve as the dome structure of the diaphragm 21, and the extension wall 222 is formed by the The flat wall 221 bends and extends in a direction away from the diaphragm 21 for connecting with the voice coil 23 and supporting the voice coil 23. In this embodiment, the flat wall 221 has a ring shape.

More preferably, the vibrating part 211 is provided with a through hole 2111 penetrating therethrough, and the flat wall 221 completely covers the through hole 2111. Compared with the vibration part 211, the flat wall 221 is a rigid material, which is beneficial to improve the high-frequency acoustic performance of the sound emitting device 100, and the arrangement of the through hole 2111 can reduce the diaphragm 21 to a certain extent. The thickness effectively increases the vibration space of the vibrating part 211.

The voice coil 23 is inserted into the magnetic gap 30 and fixedly connected to the extension wall 222. The voice coil 23 drives the extension wall 222 to vibrate to drive the flat wall 221 to vibrate, thereby driving the vibrating part 211 to vibrate and produce sound.

In the above structure, since the flat wall 221 of the frame 22 serves as the top ball structure of the diaphragm 21 to achieve sound radiation, and the extension 222 is used to fix the voice coil 23, that is, the frame 22 and the diaphragm 21 form an integrated structure, which reduces The fitting error of the assembly between parts improves its acoustic performance, while simplifying the assembly process and improving production efficiency.

More preferably, the extension wall 222 includes a first extension wall 2221 bent and extended from the flat wall 221 in a direction away from the vibrating portion 211 of the diaphragm 21, and a first extension wall 2221 extending from the first extension wall 2221 toward the The second extension wall 2222 bent and extended in the 3 direction of the magnetic circuit system. The second extension wall 2222 abuts against the outer side of the voice coil 23 and forms a fixed connection. The above structure realizes that the extension wall 222 of the skeleton 22 is bonded from the outside of the voice coil 23 to form a support for the voice coil 23. This structure design is more flexible for the control of the magnetic gap 30 and facilitates the overall structure design of the sound generating device 100.

The extension wall 222 may be an integral ring structure, or may be a split structure enclosed in a ring. In this embodiment, the extension wall 222 includes three extension walls 222 and is arranged at equal intervals along the extension direction of the flat wall.

One side of the auxiliary diaphragm 24 is fixed to the outer wall 12, and the other side is fixed to the end of the first extension wall 2221 away from the flat wall 2222 to prevent lateral swing of the frame 22, thereby avoiding This reduces the lateral swing of the voice coil 23 and improves the stability of the sound emitting device 100.

The magnetic circuit system 3 includes a first magnetic bowl 31, a magnetic steel unit 32 accommodated and fixed in the first magnetic bowl 31, and a magnetic steel unit 32 that penetrates the first magnetic bowl 31 in a vertical vibration direction and is connected to the second extension wall. 2222 matching slot 33. That is, the shape and the number of the relief groove 33 correspond to the shape and the number of the second extension wall 2222.

Specifically, the first magnetic bowl 31 includes a first magnetic bowl bottom wall 311 that is supported and fixed to the basin frame 1, and the first magnetic bowl bottom wall 311 is bent and extended in a direction close to the diaphragm 21. The first magnetic bowl side wall 312, the magnetic steel unit 32 and the first magnetic bowl side wall 312 together form the magnetic gap 30. In this embodiment, the relief groove 33 extends along the vibration direction and penetrates the side wall 312 of the first magnetic bowl. The first extension wall 2221 is arranged around the outer side of the magnetic circuit system 3 and spaced apart, and the second extension wall 2222 extends into the magnetic gap 30 through the relief groove 33 and is connected to the voice coil 23.

More preferably, in this embodiment, the magnetic circuit system 3 is installed in the accommodating space 10 so that the relief slot 33 and the through opening 131 are arranged one by one. At this time, the first extension wall 2221 is arranged around the inner wall 13 at intervals, and the second extension wall 2222 sequentially extends to the magnetic gap 30 through the opening 131 and the relief groove 33 The inner part is connected to the outer side of the voice coil 23.

In order to make the magnetic lines of force of the magnetic circuit system 3 more fully utilized, in this embodiment, the magnetic circuit system 3 further includes a second magnetic bowl 34 covering the magnetic steel unit 32, and the second magnetic bowl 34 guides the magnetic field lines on the side of the magnetic steel unit 32 close to the diaphragm 21 back into the magnetic gap 30.

The second magnetic bowl 34 and the first magnetic bowl 31 are arranged directly opposite to each other. The second magnetic bowl 34 includes a second magnetic bowl bottom wall 341 and a second magnetic bowl side wall 342.

The second magnetic bowl bottom wall 341 is arranged directly opposite to the first magnetic bowl bottom wall 311, and the second magnetic bowl side wall 342 is approached from the second magnetic bowl bottom wall 341 to the first magnetic bowl. The bowl bottom wall 311 is bent and extended in the direction, and the second magnetic bowl side wall 342 may abut against the first magnetic bowl side wall 312 or may be spaced apart from the first magnetic bowl side wall 312. At this time, the relief groove 33 also penetrates the second magnetic bowl side wall 342 to provide the second extension wall 2222 of the frame 22 with more sufficient movement space and improve reliability. When the relief groove 33 on the side wall 342 of the second magnetic bowl extends in the vibration direction to a height beyond the diaphragm 21, the surface of the diaphragm 21 away from the magnetic circuit system 3 is fixed to the surface of the diaphragm 21. The second magnetic side wall 342 completely covers the ring member 4 of the relief groove 33.

Since the diaphragm 21 is fixed on the outer wall 12 and the inner wall 13 of the basin frame 1, the upper part of the containing space 10 enclosed by the inner wall 13 can be exposed. In this embodiment, it is more preferable when the magnetic circuit system 3 is installed in the containing space. After 10 hours, the top surface of the magnetic circuit system 3 is made higher than the vibration part 211 (specifically, the flat wall 221 serving as the dome top) in the vibration direction, forming an exposed structure, and the vibration part 211 has the maximum amplitude The position is lower than or parallel to the top surface of the magnetic circuit system 3, that is, the diaphragm 21 wraps around the top of the magnetic circuit system 3 in the horizontal direction, thereby saving the space of the product in the vibration direction and effectively reducing The thickness of the product.

The above are only the embodiments of the present invention. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all belong to the present invention. The scope of protection.

Claims

A sounding device, comprising a basin frame, a vibration system supported on the basin frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound, the magnetic circuit system having a magnetic gap, and the vibration system includes :

A vibrating membrane, the vibrating membrane comprising a vibrating part, a folding ring part bent and extending from the periphery of the vibrating part, and a fixing part bent and extended by the folding ring part and fixed to the basin frame;

The frame includes a flat wall and an extension wall; the flat wall is attached to the side of the vibrating part close to the magnetic circuit system to serve as the dome structure of the diaphragm, and the extension wall is composed of The flat wall is bent and extended in a direction away from the diaphragm; and,

A voice coil, the voice coil is inserted in the magnetic gap and fixedly connected to the extension wall, and the voice coil drives the extension wall to vibrate to drive the plate wall to vibrate, thereby driving the vibrating part to vibrate and produce sound .
The sounding device according to claim 1, wherein the extension wall includes a first extension wall bent and extended from the flat wall in a direction away from the vibrating part of the diaphragm, and a first extension wall formed by the first extension wall. A second extension wall that is bent and extended in a direction close to the magnetic circuit system, and the second extension wall abuts against the outer side of the voice coil and forms a fixed connection.
3. The sound emitting device according to claim 2, wherein the extension wall includes three and is arranged at equal intervals along the extension direction of the flat wall.
The sounding device according to claim 2 or 3, wherein the magnetic circuit system comprises a first magnetic bowl, a magnetic steel unit accommodating and fixed in the first magnetic bowl, and penetrating through the first magnetic bowl along the vertical vibration direction. A magnetic bowl and a relief groove matching the second extension wall;

The first magnetic bowl includes a first magnetic bowl bottom wall supported and fixed to the basin frame, and a first magnetic bowl side wall bent and extended from the first magnetic bowl bottom wall in a direction close to the diaphragm, The magnetic steel unit and the side wall of the first magnetic bowl jointly form the magnetic gap;

The relief groove extends along the vibration direction and penetrates the side wall of the first magnetic bowl;

The first extension wall is arranged around the outer side of the magnetic circuit system and arranged at intervals, and the second extension wall extends into the magnetic gap through the relief groove.
The sounding device according to claim 4, wherein the basin frame comprises a bottom wall, an outer wall bent and extended from the periphery of the bottom wall, and an inner wall bent and extended by the bottom wall, and the outer wall surrounds the The inner wall is arranged and spaced apart from each other, the inner wall is provided with a through opening extending therethrough, and the through opening extends along the vibration direction of the vibration system;

The bottom wall and the inner wall jointly enclose an accommodating space, and the magnetic circuit system is installed in the accommodating space, and the relief groove and the opening are arranged one by one directly opposite;

The first extension wall is ringed on the outer side of the inner wall and arranged at intervals, and the second extension wall sequentially extends into the magnetic gap through the through opening and the relief groove.
The sound generating device according to claim 4, wherein the magnetic circuit system further comprises a second magnetic bowl covering the magnetic steel unit, and the second magnetic bowl is directly opposite to the first magnetic bowl The second magnetic bowl includes a second magnetic bowl bottom wall and a second magnetic bowl side wall, the second magnetic bowl bottom wall and the first magnetic bowl bottom wall are arranged directly opposite to each other, the second magnetic bowl The side wall of the bowl is bent and extended from the bottom wall of the second magnetic bowl toward the bottom wall of the first magnetic bowl, and the relief groove also penetrates the side wall of the second magnetic bowl.
The sounding device according to claim 5, wherein the fixing part of the diaphragm includes a first fixing part and a second fixing part; the first fixing part is ring-shaped and fixed to the outer wall, The second fixing part is ring-shaped and fixed to the inner wall;

The folding ring portion includes a first folding ring portion having a ring shape and a second folding ring portion having a ring shape. The first folding ring portion surrounds the second folding ring portion and is spaced apart from each other; The side of the ring portion away from the second folding ring portion is connected to the first fixing portion, and the side of the second folding ring portion away from the first folding ring portion is connected to the second fixing portion;

The vibrating part has a ring shape, the vibrating part is located between the first folding ring part and the second folding ring part, and the outer side of the vibrating part is connected with the first folding ring part, the The inner side of the vibrating part is connected with the second folding ring part;

The flat wall is attached to the side of the vibrating part close to the magnetic circuit system.
7. The sound emitting device according to claim 7, wherein the vibrating portion is provided with a through hole penetrating therethrough, and the flat plate wall completely covers the through hole.
The sounding device according to claim 7, wherein the top surface of the magnetic circuit system is higher than the vibration part in the vibration direction, and the position of the maximum amplitude of the vibration part is lower than or parallel to the The top surface of the magnetic circuit system.
The sounding device according to claim 5, wherein the vibration system further comprises an auxiliary diaphragm, one side of the auxiliary diaphragm is fixed to the outer wall, and the other side is fixed to the first extension wall away from One end of the flat wall.