WO2022067991A1

WO2022067991A1 - Sound generation device

Info

Publication number: WO2022067991A1
Application number: PCT/CN2020/128318
Authority: WO
Inventors: 宋威; 肖波; 令狐荣林; 孔晨亮; 章统
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: 2020-09-30
Filing date: 2020-11-12
Publication date: 2022-04-07
Also published as: CN213462266U

Abstract

Provided in the present utility model is a sound generation device, comprising a cone frame, and a vibration system and a magnetic circuit system which are respectively fixed on the cone frame, wherein the magnetic circuit system drives the vibration system to vibrate and generate sound; the vibration system comprises a diaphragm and a voice coil driving the diaphragm to vibrate and generate sound; the cone frame is provided with a plurality of notches which are spaced apart and formed by means of being recessed from a side close to the magnetic circuit system in the direction away from the magnetic circuit system; and the diaphragm comprises: a vibration portion, which is in an annular shape; an inner rim, which is bent and extends from an inner periphery of the vibration portion; an outer rim, which is bent and extends from an outer periphery of the vibration portion; a first fixing portion, which is bent and extends from a side of the outer rim away from the vibration portion, along an outer side of the cone frame; and a plurality of protrusions, which are formed and protrude from a side of the first fixing portion away from the outer rim in a manner corresponding to the plurality of notches. A side of the inner rim away from the vibration portion is fixed to the magnetic circuit system, the first fixing portion is fixedly attached to an outer side of the cone frame, and each of the protrusions is correspondingly accommodated in each of the notches. Compared with the related art, the sound generation device in the present utility model has a better reliability.

Description

sound device

technical field

The utility model relates to the field of electro-acoustic conversion, in particular to a sound-emitting device used in electronic sound box products.

Background technique

Sound-emitting devices, also known as speakers or horns, are used in speakers to convert audio signals into sound for playback.

The sound-generating device of the related art includes a basin frame, a vibration system respectively fixed to the basin frame and a magnetic circuit system for driving the vibration system to vibrate and produce sound. The vibration system includes a diaphragm and a voice coil that drives the diaphragm to vibrate and produce sound and an elastic member fixed on the side of the basin frame away from the diaphragm,

The basin frame is provided with a plurality of mutually spaced notches formed by a side close to the magnetic circuit system which is recessed in a direction away from the magnetic circuit system;

The vibrating membrane includes a ring-shaped vibrating portion, an inner ring bent and extended from the inner periphery of the vibrating portion, and an outer ring bent and extended from the outer periphery of the vibrating portion; the outer ring is far away from the vibration One side of the inner ring is fixed to the basin frame, and one side of the inner fold away from the vibrating part is fixed to the magnetic circuit system.

However, in the sound-emitting device of the related art, in order to facilitate the positioning of components such as the elastic member or the magnetic circuit system, the basin frame is provided with a plurality of gaps spaced apart from each other. Although this structure is convenient for the positioning of other components, due to the gaps The existence of air leakage leads to the problem of air leakage in the sound-emitting device.

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

technical problem

The purpose of the utility model is to provide a sound device with better reliability.

technical solutions

In order to achieve the above purpose, the present invention provides a sound-generating device, which includes a basin frame, a vibration system respectively fixed to the basin frame, and a magnetic circuit system for driving the vibration system to vibrate and sound, and the vibration system includes a vibrating membrane and the voice coil that drives the diaphragm to vibrate and sound,

The vibrating film includes a ring-shaped vibrating portion, an inner ring that is bent and extended from the inner periphery of the vibrating portion, an outer ring that is bent and extended from the outer periphery of the vibrating portion, and is separated from the outer ring by the outer ring. One side of the vibrating part is bent and extended along the outer side of the basin frame, and a plurality of protruding parts formed by the side of the first fixing part away from the outer ring and corresponding to the plurality of notches bulge, the side of the inner folded ring away from the vibrating part is fixed on the magnetic circuit system, the first fixing part is attached and fixed on the outer side of the basin frame, and each of the bulges is correspondingly accommodated in the magnetic circuit system. each of said gaps.

Preferably, the basin frame has a racetrack-type structure with rounded corners, which includes two short shafts spaced apart and correspondingly arranged, two long shafts spaced apart from each other and arranged correspondingly, and two long shafts respectively connected to the long shaft and the For the four rounded corners of the short axis, the notches are arranged at the connection between the long axis and the rounded corner and/or at the connection between the short axis and the rounded corner.

Preferably, the orthographic projection of the first fixing portion along the vibration direction of the diaphragm is a rectangle, and the protrusions are all arranged at right angles of the rectangle; the diaphragm further comprises a ring formed by the outer ring. The side away from the vibrating portion is respectively a second fixing portion that is bent and extended along the inner side of each of the rounded corners, and the protrusions located at the same right angle are connected to one end away from the first fixing portion In the same second fixing portion, each of the second fixing portions is respectively attached and fixed to the inner side of each of the rounded corners; the second fixing portion and the first fixing portion are spaced to form a gap, and each The rounded corners are correspondingly accommodated in each of the gaps.

Preferably, along the vibration direction of the vibrating membrane, the distance between the end of the short axis away from the vibrating membrane and the vibrating membrane and the distance between the end of the rounded corner away from the vibrating membrane and the vibrating membrane The distance between them is smaller than the distance between the end of the long axis away from the vibrating membrane and the vibrating membrane.

Preferably, the adjacent short axis and the long axis are at least partially spaced apart along the vibration direction perpendicular to the vibrating membrane, and a positioning groove is formed at the corresponding rounded corner, and the vibration system further includes a clip fixed to the diaphragm. The positioning groove and the auxiliary diaphragm assembly arranged at a distance from the diaphragm.

Preferably, the magnetic circuit system includes a magnetic yoke fixed to the basin frame, a main magnetic steel unit fixed to the magnetic yoke, and arranged at intervals on the periphery of the main magnetic steel unit and together with the main magnetic steel unit. A secondary magnetic steel unit forming a magnetic gap and a magnetic bowl covered on the main magnetic steel unit, the voice coil is suspended in the magnetic gap, and the peripheral side of the magnetic bowl is abutted and fixed on the secondary magnetic steel The steel unit, the side of the inner fold away from the vibrating part is fixed to the magnetic bowl.

Preferably, the magnetic bowl includes a gap therethrough, and the voice coil further includes a voice coil lead wire electrically connected to an external electrical signal through the gap.

Preferably, the vibration system further includes a skeleton for connecting the voice coil and the diaphragm, the skeleton includes a skeleton body attached to the side of the diaphragm close to the voice coil, and the skeleton is formed by the One end of the skeleton body away from the diaphragm is bent and extended toward the magnetic gap through the gap, and is connected to the skeleton connecting arm of the voice coil.

Preferably, the basin frame is made of metal material.

beneficial effect

Compared with the related art, in the sound-emitting device of the present invention, the basin frame is provided with a plurality of mutually spaced gaps formed by the side of the basin close to the magnetic circuit system, which is recessed in the direction away from the magnetic circuit system to facilitate the magnetic circuit system. The positioning of components such as the road system; further, in order to solve the problem of air leakage existing in the gap, the present invention also provides a vibrating membrane, wherein the vibrating membrane comprises a ring-shaped vibrating portion, a bending portion extending from the inner periphery of the vibrating portion an inner ring, an outer ring bent and extended from the outer periphery of the vibrating part, a first fixing part bent and extended along the outer side of the basin frame from the side of the outer ring far away from the vibration part, and The side of the first fixing portion away from the outer folded ring corresponds to a plurality of protrusions formed by protruding from the plurality of notches, and the side of the inner folded ring away from the vibrating portion is fixed to the magnetic circuit The system, the first fixing part is attached and fixed to the outside of the basin frame, each of the protrusions is correspondingly accommodated in each of the gaps, under the premise of satisfying the positioning, taking into account the problem of sealing, so that the sound-emitting device can be The sealing performance is better, the reliability is improved, the overall volume of the sound-emitting device is not increased, and the space utilization rate is high.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

Fig. 1 is the stereoscopic structure schematic diagram of the sound-emitting device of the present invention;

2 is an exploded view of a partial three-dimensional structure of the sound-emitting device of the present invention;

3 is a cross-sectional view of the sound-emitting device of the present invention;

4 is a schematic diagram of the assembly structure of the basin frame and the vibrating membrane of the sound-emitting device of the present invention;

FIG. 5 is a schematic three-dimensional structure diagram of the vibrating membrane of the sound-emitting device of the present invention.

Embodiments of the present invention

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to 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, but not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work 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 supported and fixed on the basin frame 1, and a vibration system 2 that drives the vibration system 2 to vibrate and emit sound and has a magnetic gap 30 of the magnetic circuit system 3.

The basin frame 1 is made of metal material and is provided with a plurality of spaced apart notches 10 formed by the side of the basin close to the magnetic circuit system 3 being recessed in the direction away from the magnetic circuit system 3 .

Specifically, the basin frame 1 has a track-shaped structure with rounded corners, which includes two short shafts 1a spaced from each other and correspondingly arranged, two long shafts 1b spaced from each other and arranged correspondingly, and two long shafts 1b respectively connected to the long shafts. 1b and the four rounded corners 1c of the short axis 1a, the notch 10 is arranged at the connection between the long axis 1b and the rounded corner 1c and/or is arranged on the short axis 1a and the rounded corner 1c of the connection.

In this embodiment, as shown in FIG. 2 , the number of the notches 10 is eight, among which four of the notches 10 are arranged at the connection between the long axis 1b and the rounded corner 1c , and the other four notches 10 10 is arranged at the connection between the short axis 1a and the rounded corner 1c, that is, the gap 10 smoothly transitions through the rounded corner 1c to reduce the possibility of air leakage.

Preferably, along the vibration direction of the diaphragm 21 , the distance between the end of the short axis 1a away from the diaphragm 21 and the diaphragm 21 and the end of the rounded corner 1c away from the diaphragm 21 The distance from the diaphragm 21 is smaller than the distance between the end of the long axis 1b away from the diaphragm 21 and the diaphragm 21; the adjacent short axis 1a and the long axis 1b are along the The vibration direction of the diaphragm 21 is at least partially spaced apart and a positioning groove 10a is formed at the position corresponding to the rounded corner 1c. The notch 10 is arranged at the bottom of the positioning groove 10a. It can be understood that in the process In the process, since the positioning groove 10a is formed, the basin frame 1 is limited by its material. If the positioning groove 10a is to be formed, it will inevitably lead to the formation of the gap 10, that is, it can be understood that the gap 10 is a process gap.

The vibration system 2 is used for vibrating and sounding, and includes a diaphragm 21, a voice coil 22 suspended in the magnetic gap 30 and having a rounded track-shaped structure for driving the diaphragm 21 to vibrate and sound, and a For the frame 23 connecting the voice coil 22 and the diaphragm 21 and the auxiliary diaphragm assembly 24 clamped and fixed in the positioning groove 10a and spaced from the diaphragm 21, the voice coil 22 has a transmission Voice coil leads 220 for electrical signals

The vibrating membrane 21 includes a ring-shaped vibrating portion 211 , an outer ring 212 bent and extended from the outer periphery of the vibrating portion 211 , an inner ring 213 bent and extended from the inner periphery of the vibrating portion 211 , The side of the outer fold ring 212 away from the vibrating part 211 is a first fixing part 214 that is bent and extended along the outer side of the basin frame 1 , and a first fixing part 214 is away from the outer fold ring 212 . The sides corresponding to the plurality of protrusions 216 formed by the notches 10 and the side of the outer ring 212 away from the vibrating part 211 are respectively along the inner side of the rounded corner 1c of each of the basin frames 1 The second fixing portion 215 is bent and extended. The side of the inner ring 213 away from the vibrating portion 211 is fixed to the magnetic circuit system 3 , and the first fixing portion 214 is attached and fixed to the basin frame 1 . Outside, each of the protrusions 216 is correspondingly received in each of the notches 10 . That is, on the premise of satisfying the positioning, the airtightness is taken into account, so that the airtightness of the sound-emitting device 100 is better and the reliability is improved, and the overall volume of the sound-emitting device 100 is not increased, and the space utilization rate is high.

Preferably, the orthographic projection of the first fixing portion 214 along the vibration direction of the diaphragm 21 is a rectangle, the protrusions 216 are all disposed at right angles of the rectangle, and the protrusions 216 correspond to the The number of notch 10 is set to eight.

Further, the ends of the two protrusions 216 located at the same right angle away from the first fixing portion 214 are both connected to the same second fixing portion 215 , and each of the second fixing portions 215 is respectively attached to the second fixing portion 215 . The second fixing portion 215 and the first fixing portion 214 are spaced apart to form a gap 217, and the four rounded corners 1c are respectively accommodated in the four gaps 217. Inside. With this structure, the sealing performance of the sound-emitting device 100 is better. Of course, the diaphragm 21 and the basin frame 1 may adopt an integral molding process.

The frame 23 includes a frame body 231 attached to the side of the diaphragm 21 close to the voice coil 22 , and the end of the frame body 231 away from the diaphragm 21 is bent toward the magnetic gap 30 . The skeleton connecting arm 232 is extended and connected to the voice coil 22 .

The auxiliary diaphragm assembly 24 is fixed on the side of the basin frame 1 close to the magnetic circuit system 3 . Specifically, the auxiliary diaphragm assembly 24 is clamped and fixed in the positioning groove 10a, and can be quickly positioned to the basin frame 1. The height of the short axis 1a of the side close to the auxiliary diaphragm assembly 24 is smaller than that of the long axis 1b, so that the auxiliary diaphragm assembly is 24 is quickly fixed by the basin frame 1 and does not occupy the height of the sound-emitting device along the vibration direction of the diaphragm 21, and the space utilization rate is better.

The magnetic circuit system 3 includes a magnetic yoke 31 fixed to the basin frame 1 , a main magnetic steel unit 32 fixed to the magnetic yoke 31 , a main magnetic steel unit 32 arranged at intervals around the main magnetic steel unit 32 and connected to the main magnetic steel. The units 32 together form the secondary magnetic steel unit 33 of the magnetic gap 30 and the magnetic bowl 34 covered on the main magnetic steel unit 32. The peripheral side of the magnetic bowl 34 is abutted and fixed to the secondary magnetic steel unit 33, The inner ring 213 is fixed to the magnetic bowl 34 at the side away from the vibrating portion 211 . The magnetic bowl 34 includes a gap 340 therethrough. The voice coil lead 220 is formed with an external electrical signal through the gap 340 . For electrical connection, the frame connecting arm 232 is bent and extended toward the magnetic gap 30 through the gap 340 . Specifically, the magnetic bowl 34 includes a main body portion 341 fixed on the side of the main magnetic steel unit 32 away from the yoke 31 , and an extension fixed on the side of the secondary magnetic steel unit 33 away from the yoke 31 . The portion 343 and the connecting portion 342 extending from the main body portion 341 along the periphery of the main magnetic steel unit 32 and connected to the extending portion 343 are formed. The connecting portion 342 penetrates to form the gap 340 .

The above are only the embodiments of the present utility model. It should be pointed out 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 belong to The scope of protection of the utility model.

Claims

A sound-generating device, comprising a basin frame, a vibration system respectively fixed to the basin frame and a magnetic circuit system for driving the vibration system to vibrate and produce sound, the vibration system comprising a vibrating film and a sound for driving the vibrating film to vibrate and produce sound circle, characterized by,

The basin frame is provided with a plurality of mutually spaced notches formed by a side close to the magnetic circuit system which is recessed in a direction away from the magnetic circuit system;

The vibrating film includes a ring-shaped vibrating portion, an inner ring that is bent and extended from the inner periphery of the vibrating portion, an outer ring that is bent and extended from the outer periphery of the vibrating portion, and is separated from the outer ring by the outer ring. One side of the vibrating part is bent and extended along the outer side of the basin frame, and a plurality of protruding parts formed by the side of the first fixing part away from the outer ring and corresponding to the plurality of notches bulge, the side of the inner folded ring away from the vibrating part is fixed on the magnetic circuit system, the first fixing part is attached and fixed on the outer side of the basin frame, and each of the bulges is correspondingly accommodated in the magnetic circuit system. each of said gaps.
The sound-generating device according to claim 1, wherein the basin frame has a racetrack-type structure with rounded corners, which comprises two short axes spaced apart and correspondingly arranged, and two long axes spaced apart and correspondingly arranged And four rounded corners connected to the long axis and the short axis respectively, the gap is arranged at the connection of the long axis and the rounded corner and/or is arranged on the short axis and the rounded corner of the connection.
The sound-emitting device according to claim 2, wherein the orthographic projection of the first fixing portion along the vibration direction of the diaphragm is rectangular, and the protrusions are all arranged at right angles of the rectangle; The vibrating membrane further includes a second fixing portion that is bent and extended along the inner side of each of the rounded corners from the side of the outer ring that is far away from the vibrating portion, and the protrusions located at the same right angle. One end away from the first fixing portion is connected to the same second fixing portion, each of the second fixing portions is respectively attached and fixed to the inner side of each of the rounded corners; the second fixing portion is connected to the same second fixing portion. The first fixing parts are spaced to form gaps, and each of the rounded corners is correspondingly accommodated in each of the gaps.
The sound-generating device according to claim 2, characterized in that, along the vibration direction of the diaphragm, the distance between the end of the short axis away from the diaphragm and the diaphragm and the rounded corners away from all The distance between one end of the vibrating membrane and the vibrating membrane is smaller than the distance between the end of the long axis away from the vibrating membrane and the vibrating membrane.
The sound-generating device according to claim 4, wherein the adjacent short axis and the long axis are at least partially spaced apart along the vibration direction perpendicular to the diaphragm, and a positioning groove is formed at the corresponding rounded corner , the vibration system further includes an auxiliary diaphragm assembly that is clamped and fixed in the positioning groove and is spaced from the diaphragm.
The sound-emitting device according to claim 1, wherein the magnetic circuit system comprises a magnetic yoke fixed to the basin frame, a main magnetic steel unit fixed to the magnetic yoke, and a main magnetic steel unit arranged at intervals around the main magnetic steel unit A secondary magnetic steel unit, which is on the side and forms a magnetic gap with the main magnetic steel unit, and a magnetic bowl covered on the main magnetic steel unit, the voice coil is suspended in the magnetic gap, and the magnetic bowl The peripheral side of the inner ring is abutted and fixed to the auxiliary magnetic steel unit, and the side of the inner fold away from the vibrating part is fixed to the magnetic bowl.
The sound-generating device of claim 6, wherein the magnetic bowl includes a gap therethrough, and the voice coil further includes a voice coil lead electrically connected to an external electrical signal through the gap.
The sound-generating device according to claim 7, wherein the vibration system further comprises a frame for connecting the voice coil and the vibrating membrane, the frame comprising a frame that is attached to the vibrating membrane and is close to the vibrating membrane. The skeleton body on one side of the voice coil is bent and extended from the end of the skeleton body away from the diaphragm through the gap toward the magnetic gap, and is connected to the skeleton connecting arm of the voice coil.
The sound-generating device according to claim 1, wherein the basin frame is made of a metal material.