WO2021120011A1

WO2021120011A1 - Sound-producing device

Info

Publication number: WO2021120011A1
Application number: PCT/CN2019/126060
Authority: WO
Inventors: 严绪东; 邵涛; 顾小江
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: 2019-12-17
Filing date: 2019-12-17
Publication date: 2021-06-24

Abstract

The present utility model provides a sound-producing device, comprising a basket, a vibration system supported on the basket, and a magnetic circuit system for driving the vibration system to vibrate to produce sound. The magnetic circuit system has a magnetic gap. The vibration system comprises a diaphragm, a bobbin, and a voice coil. The diaphragm comprises a vibration portion, a surround portion extending in a bent manner from the periphery of the vibration portion, and a fixed portion extending in a bent manner from the surround portion and fixed to the basket. The bobbin comprises a flat plate wall attached to the side of the vibration portion close to the magnetic circuit system, an extension wall extending in a bent manner from the flat plate wall in a direction away from the diaphragm, and a reinforcing portion formed by extending in a bent manner from the extension wall to the magnetic circuit system. The reinforcing portion comprises an annular reinforcing frame extending from the extension wall to the magnetic circuit system, and a reinforcing arm which is located in the reinforcing frame and of which both ends are connected to the reinforcing frame. The side of the reinforcing frame distant from the extension wall extends into the magnetic gap. The voice coil is inserted in the magnetic gap, and is fixedly connected to the reinforcing frame. Compared with the related art, the sound-producing device of the present utility model has a wider frequency band and better sound production effect.

Description

Sound device

Technical field

The utility model 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 sounding 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 produce sound. The vibration system includes an insert and a magnetic circuit system. The voice coil of the magnetic gap, the diaphragm fixed to the basin frame, and the frame, and the frame is used to support the voice coil and the diaphragm.

technical problem

However, in the related art sounding device, the skeleton has no rib structure, the strength is poor, and the frequency band of the sounding device is narrow.

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

Technical solutions

The purpose of the utility model is to provide a sounding device with a wider frequency band and better sounding effect.

In order to achieve the above purpose, the present utility model provides a sounding device,

It includes a basin frame, a vibration system supported on the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and produce sound, the magnetic circuit system has 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 attached to the side of the vibrating part close to the magnetic circuit system, an extension wall bent and extended from the flat wall in a direction away from the diaphragm, and the extension wall A reinforcing part formed by bending and extending in the direction of the magnetic circuit system; the reinforcing part includes a reinforcing frame in a ring structure extending from the extension wall in the direction of the magnetic circuit system, and two ends located in the reinforcing frame Reinforcement arms connected to the reinforcement frame, the side of the reinforcement frame away from the extension wall extends into the magnetic gap; and,

The voice coil is fixedly connected to the reinforcement frame and inserted in the magnetic gap.

Preferably, the reinforcing frame is rectangular, the reinforcing arm includes two and connecting two sets of diagonal corners of the reinforcing frame respectively, and the side of the reinforcing frame away from the extension wall is fixed to the outer side of the voice coil connection.

Preferably, the reinforcing portion further includes a bump extending from the side of the reinforcing frame close to the diaphragm in the direction of the voice coil, and the bump is fixed to an end of the voice coil close to the diaphragm connection.

Preferably, the side of the reinforcing frame close to the diaphragm is flush with the flat wall, and the side of the reinforcing frame away from the diaphragm is flush with the end of the extension wall away from the diaphragm.

Preferably, the reinforcing parts include four and are arranged at equal intervals.

Preferably, the magnetic circuit system includes a first magnetic bowl, a magnetic steel unit accommodating and fixed in the first magnetic bowl, and a relief slot that penetrates the first magnetic bowl and matches the reinforcing part;

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 is fixed to the bottom wall of the first magnetic bowl and is spaced from the side wall of the first magnetic bowl to form the magnetic gap;

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

The extension wall is arranged around the outer side of the magnetic circuit system and arranged at intervals, and the reinforcement part 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 extending therethrough, the through opening extends along the vibration direction, and the fixing portion of the diaphragm is fixed to the outer wall;

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

The extension wall is ringed on the outer side of the inner wall and arranged at intervals, and the reinforcement portion 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 sound generating device further includes a front cover provided on a side of the inner wall away from the bottom wall, and the front cover presses the second fixing portion on the top end of the inner wall.

Beneficial effect

Compared with the related art, in the sound generating device of the present invention, the frame includes a flat plate wall attached to the side of the vibrating part close to the magnetic circuit system, and a direction away from the diaphragm from the flat plate wall A bent extension wall and a reinforced part formed by bending and extending the extension wall in the direction of the magnetic circuit system; the reinforcement part includes a ring-shaped structure extending from the extension wall in the direction of the magnetic circuit system A reinforcing frame and a reinforcing arm located in the reinforcing frame and connected to the reinforcing frame at both ends; the voice coil is inserted in the magnetic gap and fixedly connected to the reinforcing frame, and the voice coil driving station The reinforcing part vibrates to drive the plate wall to vibrate, thereby driving the vibrating part to vibrate and produce sound. That is to say, the arrangement of the skeleton reinforcement part is increased to increase the strength of the entire skeleton, thereby increasing the strength of the entire vibration system, expanding the high frequency of the sound generating device, and having a better sound effect.

Description of the drawings

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

Figure 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 device of the present invention;

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

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

Embodiments of the present invention

The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. Examples. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present utility model.

Please refer to FIGS. 1-4 at the same time. The present invention provides a sound generating device 100, which includes a basin frame 1, a vibration system supported on the basin frame 1, 2, a magnetic circuit system 3 that drives the vibration system 2 to vibrate and produce sound. As well as the front cover 4, the magnetic circuit system 3 has a magnetic gap 30.

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 from the bottom wall 11. The outer walls 12 are arranged around the inner wall 13 and are spaced apart from each other. The inner wall 13 is provided with a through opening 131 extending therethrough, the through opening 131 extends along the vibration direction, and 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 elastic support component 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.

The fixing portion 213 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, and the second fixing portion 2132 is ring-shaped and fixed to the outer wall 12.述内壁13。 Said inner wall 13.

The folding ring portion 212 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 surrounds 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 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 The part 2121 is connected, and the inner side of the vibrating part 211 is connected with the second folding ring part 2122.

The frame 22 includes a flat wall 221 attached to the side of the vibrating part 211 close to the magnetic circuit system 3, an extension wall 222 bent and extended from the flat wall 221 in a direction away from the diaphragm 21, and A reinforcing portion 223 formed by bending and extending the extension wall 222 in the direction of the magnetic circuit system 3;

In this embodiment, the reinforcing portion 223 includes four and is arranged at equal intervals. The reinforcement portion 223 includes a reinforcement frame 2231 in a ring structure extending from the extension wall 222 in the direction of the magnetic circuit system 3, located in the reinforcement frame 2231 and connected to the reinforcement frame 2231 at both ends. The arm 2232 and the protrusion 2233 extending from the side of the reinforcing frame 2231 close to the diaphragm 21 in the direction of the voice coil 23. The reinforcement frame 2231 is rectangular and the side of the reinforcement frame 2231 away from the extension wall 222 extends into the magnetic gap 30; the reinforcement arm 2232 includes two and respectively connects the two groups of the reinforcement frame 2231 Diagonal. The side of the reinforcing frame 2231 close to the diaphragm 21 is flush with the flat wall 221, the side of the reinforcing frame 2231 away from the diaphragm 21 and the extension wall 222 away from the diaphragm 21 One end is flush. The structure of the reinforcing arm 2232 increases the strength of the entire skeleton 22, thereby increasing the strength of the entire vibrating system 2 and expanding the high frequency of the sound emitting device 100.

The voice coil 23 is fixedly connected to the reinforcing frame 2231 and inserted into the magnetic gap 30 through the reinforcing frame 2231; specifically, the reinforcing frame 2231 is on a side away from the extension wall 222 and the The outer side of the voice coil 23 is fixedly connected, and the protrusion 2233 is fixedly connected to an end of the voice coil 23 close to the diaphragm 21; the voice coil 23 drives the reinforcing portion 223 to vibrate to drive the flat wall 221 to vibrate , Thereby driving the vibrating part 211 to vibrate and produce sound. That is, the protrusion 2233 and the reinforcement frame 2231 abut the voice coil 23 together, which increases the contact area between the reinforcement portion 223 and the voice coil 23, and the greater the area that drives the reinforcement portion 223 to vibrate, Makes reliability better.

An elastic support component 24 is arranged around the inner wall 13, one side of the elastic support component 24 is fixed to the outer wall 12, and the other side is fixed to an end of the reinforcing frame 2231 away from the flat wall 221. Specifically, the elastic support assembly 24 includes an elastic member 241 and an auxiliary diaphragm 242 attached to the side of the elastic member 241 away from the diaphragm 21.

The magnetic circuit system 3 is at least partially located in the accommodating space 10, and includes a first magnetic bowl 31, a magnetic steel unit 32 accommodating and fixing in the first magnetic bowl 31, penetrating the first magnetic bowl 31 and The relief groove 33 matching the reinforcing portion 223 and the second magnetic bowl 34 covering the magnetic steel unit 32.

The first magnetic bowl 31 includes a first magnetic bowl bottom wall 311 that is supported and fixed to the basin frame 1, and a first magnetic bowl bottom wall 311 is bent and extended in a direction close to the diaphragm 21. The magnetic bowl side wall 312, the magnetic steel unit 32 is fixed to the first magnetic bowl bottom wall 311 and forms the magnetic gap 30 together with the first magnetic bowl side wall 312.

The relief groove 33 penetrates the side wall 312 of the first magnetic bowl and extends along the vibration direction;

The extension wall 222 is arranged around the outer side of the magnetic circuit system 3 and is arranged at intervals, and the reinforcement portion 223 extends into the magnetic gap 30 through the relief groove 33.

The second magnetic bowl 34 is arranged directly opposite to the first magnetic bowl 31; the second magnetic bowl 34 includes a second magnetic bowl bottom wall 341 and a second magnetic bowl side wall 342, and the second magnetic bowl bottom The wall 341 and the first magnetic bowl bottom wall 311 are arranged directly opposite each other, and the second magnetic bowl side wall 342 is bent from the second magnetic bowl bottom wall 341 to a direction close to the first magnetic bowl bottom wall 311 Extending, the relief groove 33 also penetrates the side wall 342 of the second magnetic bowl.

In this embodiment, the relief groove 33 and the through opening 131 of the inner wall 13 are arranged one by one; the extension wall 222 is arranged on the outer side of the inner wall 13 and is arranged at intervals, and the reinforcing portion 223 It extends into the magnetic gap 30 through the opening 131 and the relief groove 33 in sequence.

The front cover 4 is arranged on a side of the inner wall 13 away from the bottom wall 11, and the front cover 4 presses the second fixing portion 2132 on the top end of the inner wall 13, and the sealing effect is better.

The above are only the embodiments of the present utility model. 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 utility model, but these all belong to The scope of protection of the utility model.

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 attached to the side of the vibrating part close to the magnetic circuit system, an extension wall bent and extended from the flat wall in a direction away from the diaphragm, and the extension wall A reinforcing part formed by bending and extending in the direction of the magnetic circuit system; the reinforcing part includes a reinforcing frame in a ring structure extending from the extension wall in the direction of the magnetic circuit system, and two ends located in the reinforcing frame Reinforcement arms connected to the reinforcement frame, the side of the reinforcement frame away from the extension wall extends into the magnetic gap; and,

The voice coil is fixedly connected to the reinforcement frame and inserted in the magnetic gap.
The sounding device according to claim 1, wherein the reinforcement frame is rectangular, the reinforcement arm includes two and is connected to two sets of diagonal corners of the reinforcement frame, and the reinforcement frame is away from the extension wall. One side is fixedly connected to the outer side of the voice coil.
The sounding device according to claim 2, wherein the reinforcing part further comprises a protrusion extending from the side of the reinforcing frame close to the diaphragm in the direction of the voice coil, and the protrusion is connected to the The end of the voice coil close to the diaphragm is fixedly connected.
The sounding device according to claim 3, wherein the side of the reinforcing frame close to the diaphragm is flush with the wall of the flat plate, and the side of the reinforcing frame away from the diaphragm is aligned with the extension The end of the wall away from the diaphragm is flush.
The sound emitting device according to claim 1, wherein the reinforcing part includes four and is arranged at equal intervals.
The sounding device according to claim 1, wherein the magnetic circuit system comprises a first magnetic bowl, a magnetic steel unit accommodating and fixing in the first magnetic bowl, and a magnetic steel unit that penetrates the first magnetic bowl and is connected to the first magnetic bowl. The matching slot for the reinforcement part;

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 is fixed to the bottom wall of the first magnetic bowl and is spaced from the side wall of the first magnetic bowl to form the magnetic gap;

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

The extension wall is arranged around the outer side of the magnetic circuit system and arranged at intervals, and the reinforcement part extends into the magnetic gap through the relief groove.
The sounding device according to claim 6, wherein 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 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, the through opening extends along the vibration direction, and the fixing portion of the diaphragm is fixed to the outer wall;

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

The extension wall is ringed on the outer side of the inner wall and arranged at intervals, and the reinforcement portion sequentially extends into the magnetic gap through the through opening and the relief groove.
The sounding device according to claim 6, 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.
7. The sound emitting device according to claim 7, 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.
The sounding device according to claim 9, wherein the sounding device further comprises a front cover arranged on a side of the inner wall away from the bottom wall, and the front cover presses the second fixing portion On the top of the inner wall.