WO2022067974A1

WO2022067974A1 - Sound production device

Info

Publication number: WO2022067974A1
Application number: PCT/CN2020/127831
Authority: WO
Inventors: 宋威; 令狐荣林; 肖波; 孔晨亮; 章统
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声光电科技(常州)有限公司
Priority date: 2020-09-30
Filing date: 2020-11-10
Publication date: 2022-04-07
Also published as: CN112261556A; CN112261556B

Abstract

Provided is a sound production device, comprising a basket frame, and a vibration system and a magnetic circuit system, which drives the vibration system to vibrate to produce sound and has a magnetic gap, respectively fixed to the basket frame, wherein the vibration system comprises a diaphragm fixed to the basket frame, and a voice coil inserted into the magnetic gap to drive the diaphragm to vibrate to produce sound; the vibration system further comprises a support plate fixed to the side of the basket frame away from the diaphragm; the support plate comprises a first support portion fixed to the side of the basket frame away from the diaphragm, and a second support portion extending towards the voice coil from the first support portion; and the vibration system further comprises an elastic conductive member supported and fixed to the side of the first support portion close to the diaphragm and electrically connected to the voice coil, and an auxiliary diaphragm supported and fixed to the side of the second support portion close to the diaphragm. Compared with the related art, the sound production device of the present invention has a better space utilization rate.

Description

sound device

technical field

The invention 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 , an elastic conductive member fixed on the side of the basin frame away from the diaphragm and electrically connected to the voice coil, and an auxiliary diaphragm attached to the elastic conductive member away from the diaphragm; the auxiliary diaphragm The diaphragm is used to prevent the sway of the voice coil vibration and to enhance the vibration performance of the vibration system.

However, in the sound-emitting device of the related art, since the auxiliary diaphragm and the elastic conductive member are overlapped, the height of the transmitting device along the vibration direction of the diaphragm is increased, and the volume of the sound-emitting device is further increased.

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

technical problem

The purpose of the present invention is to provide a sounding device with better space utilization.

technical solutions

In order to achieve the above object, 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 that drives the vibration system to vibrate and emit sound and has a magnetic gap. It includes a diaphragm fixed on the basin frame and a voice coil inserted in the magnetic gap to drive the diaphragm to vibrate and sound,

The vibration system also includes a support plate fixed on the side of the basin frame away from the diaphragm, the support plate includes a first support portion fixed on the side of the basin frame away from the diaphragm, and the first support portion is fixed on the side of the basin frame away from the diaphragm. a second support portion extending in a direction close to the voice coil;

The vibration system further includes an elastic conductive member supported and fixed on the side of the first support portion close to the diaphragm and electrically connected with the voice coil, and an elastic conductive member supported and fixed on the second support portion close to the diaphragm Auxiliary diaphragm on one side.

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

Preferably, the elastic conductive member includes a first fixing arm fixed on the first support portion, an elastic arm extending from the first fixing arm in a direction close to the voice coil, and a first fixing arm extending from the elastic arm Two fixed arms, the second fixed arm is fixed on the side of the frame body away from the diaphragm.

Preferably, an end of the first support portion away from the second support portion is provided with a positioning notch formed by a depression, and a side of the first fixing arm close to the support plate is provided with a convex toward the positioning notch. forming positioning bumps, and the positioning bumps are accommodated in the positioning notch.

Preferably, the second support portion includes two and they are respectively formed by extending from opposite ends of the first support portion, and the two second support portions together enclose a accommodating space; the auxiliary diaphragm is accommodated in In the accommodating space, the auxiliary diaphragm includes a folded ring formed in a recessed direction toward the magnetic circuit system, a first fixed portion and a second fixed portion bent and extended from opposite sides of the folded ring. The first fixing part is fixed on one end of the second supporting part close to the accommodating space, and the second fixing part is fixed on the side of the frame body away from the vibrating membrane.

Preferably, the first fixing portion includes a first notch extending therethrough, the second fixing portion includes a second notch penetrating thereon, and the elastic arm passes through the first notch, the folding ring and the The second notch extends toward the voice coil.

Preferably, the elastic arms include two and are arranged symmetrically.

Preferably, two of the supporting plate, the auxiliary diaphragm, and the elastic conductive member are provided correspondingly and disposed on opposite sides of the voice coil.

Preferably, the magnetic circuit system comprises a magnetic yoke fixed on a side of the support plate away from the basin frame, a main magnetic steel unit fixed on the magnetic yoke, and arranged at intervals on the peripheral side of the main magnetic steel unit and A secondary magnetic steel unit that forms the magnetic gap together with the primary magnetic steel unit and a magnetic bowl covered on the primary magnetic steel unit, the peripheral side of the magnetic bowl is abutted and fixed to the secondary magnetic steel unit , the diaphragm is annular, the outer periphery of the diaphragm is fixed on the basin frame, and the inner periphery of the diaphragm is fixed on the magnetic bowl.

Preferably, the support plate is made of metal material.

beneficial effect

Compared with the related art, in the sound-emitting device of the present invention, the support plate includes a first support portion fixed on the side of the basin frame away from the vibrating membrane and extending from the first support portion toward the voice coil. the second support part; the elastic conductive member is supported and fixed on the side of the first support part close to the diaphragm and is electrically connected with the voice coil, and the auxiliary diaphragm is supported and fixed on the second support With this structure, the elastic conductive member and the auxiliary diaphragm can enhance the strength of the vibration system. At the same time, because the elastic conductive member and the auxiliary diaphragm are fixed on the same side of the support plate close to the diaphragm; that is, the elastic conductive member and the auxiliary diaphragm are staggered and distributed, and they are not located where The overlapping in the vibration direction of the diaphragm can reduce the height of the sound-emitting device along the vibration direction of the diaphragm, reduce the volume of the sound-emitting device, and have a higher space utilization rate.

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 accompanying drawings in the following description are only some embodiments of the present invention. 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 three-dimensional 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 a sound-emitting device of the present invention;

Fig. 4 is the assembly schematic diagram of the sound-emitting device support plate, the auxiliary diaphragm and the elastic conductive member of the present invention;

5 is a schematic view of the assembly of the sound-emitting device support plate, the auxiliary diaphragm and the elastic conductive member from another perspective of the present invention;

FIG. 6 is a schematic view of the assembly of the sound-emitting device skeleton, the support plate, the auxiliary diaphragm and the elastic conductive member of the present invention.

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIGS. 1-6 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 magnetic gap 30 for driving the vibration system 2 to vibrate and generate sound. The magnetic circuit system 3.

The basin frame 1 is made of metal material.

The vibration system 2 is used for vibrating and producing sound, and includes a diaphragm 21, a voice coil 22 inserted in the magnetic gap 30 and having a rounded track-shaped structure to drive the diaphragm 21 to vibrate and produce sound, and a skeleton. 23 . The elastic conductive member 24 , the auxiliary diaphragm 25 and the support plate 26 .

The diaphragm 21 is annular, the outer periphery of the diaphragm 21 is fixed to the basin frame, and the inner periphery of the diaphragm 21 is fixed to the magnetic circuit system 3 .

The skeleton 23 is used to connect the voice coil 22 and the diaphragm 21, and includes a skeleton body 231 attached to the side of the diaphragm 21 close to the voice coil 22, away from the skeleton body 231. One end of the diaphragm 21 is bent and extended toward the magnetic gap 30 and is connected to the frame connecting arm 232 of the voice coil 22 . The support plate 26 is made of a metal material, which improves the strength and increases the reliability of the sound-emitting device 100 . Specifically, the support plate 26 is fixed on the side of the basin frame 1 away from the diaphragm 21 , and the support plate 26 includes a first support portion 261 fixed on the side of the basin frame 1 away from the diaphragm 21 and a first support portion 261 fixed on the side of the basin frame 1 away from the diaphragm 21 The first support portion 261 extends in a direction close to the second support portion 262 of the voice coil 22 .

The elastic conductive member 24 is supported and fixed on the side of the first support portion 261 close to the diaphragm 21 and is electrically connected to the voice coil 22 , and the auxiliary diaphragm 25 is supported and fixed on the second support portion. 262 is close to the side of the diaphragm 21 . With this structure, the elastic conductive member 24 and the auxiliary diaphragm 25 can enhance the strength of the vibration system 2 . At the same time, since the elastic conductive member 24 and the auxiliary diaphragm 25 are fixed on the same side of the support plate 26 close to the diaphragm 21; that is, the elastic conductive member 24 and the auxiliary diaphragm 25 are staggered. The distribution, which does not overlap in the vibration direction of the diaphragm 21, can reduce the height of the sound-emitting device 100 along the vibration direction of the diaphragm 21, reduce the volume of the sound-emitting device 100, and have higher space utilization.

In this embodiment, two of the supporting plate 26 , the auxiliary diaphragm 25 and the elastic conductive member 24 are correspondingly arranged on two opposite sides of the voice coil 22 , as shown in FIG. 2 . , the matching structure on the left is the same as the matching structure on the right, and only the matching structure on the right is described below.

Specifically, each of the elastic conductive members 24 includes a first fixing arm 241 fixed to the first support portion 261 , an elastic arm 242 extending from the first fixing arm 241 toward the voice coil 22 , and A second fixed arm 243 extending from the elastic arm 242 , the second fixed arm 243 is fixed to the side of the frame body 231 away from the diaphragm 21 ; the elastic arm 242 of each elastic conductive member 24 Two are included and arranged symmetrically.

Preferably, one end of the first support portion 261 away from the second support portion 262 is provided with a recessed positioning notch 2610 , and the side of the first fixing arm 241 close to the support plate 26 is provided with a position close to the support plate 26 . The positioning protrusion 2410 is formed by protruding from the positioning notch 2610, and the positioning protrusion 2410 is accommodated in the positioning notch 2610; that is, with this structure, the elastic conductive member 24 can be quickly positioned to the support plate 26 ; At the same time, through the matching arrangement of the positioning bump 2410 and the positioning gap 2610, the height along the vibration direction of the diaphragm 21 is not increased, and the space utilization rate is high.

Further, the second support portions 262 include two and are respectively formed by extending from opposite ends of the first support portion 261 , and the two second support portions 262 together enclose a accommodating space 260 ; the auxiliary The diaphragm 25 is accommodated in the accommodating space 260 , and the auxiliary diaphragm 25 includes a folded ring 252 formed concavely toward the magnetic circuit system 3 , a first folded ring 252 bent and extended from opposite sides of the folded ring 252 . A fixing portion 251 and a second fixing portion 253, the first fixing portion 251 is fixed to the end of the second supporting portion 262 close to the accommodating space 260, and the second fixing portion 253 is fixed to the frame body 231 away from one side of the diaphragm 21 .

Preferably, the first fixing portion 251 includes a first notch 2510 penetrating therethrough, the second fixing portion 253 includes a second notch 2530 penetrating thereon, and the elastic arm 242 passes through the first notch 2510 in sequence. , the folding ring 252 and the second gap 2530 extend toward the voice coil 22 . That is to say, the elastic arm 242 and the auxiliary diaphragm 25 are arranged in cooperation, and the elastic arm 242 can extend its length or change its shape, further increasing the strength of the vibration system 2 and enhancing the vibration performance of the vibration system 2 . At the same time, since the elastic arm 242 is accommodated in the folding ring 252 , when the diaphragm 21 vibrates greatly, the elastic arm 242 can be protected, the life of the elastic arm 242 can be prolonged, and the reliability of the elastic conductive member 24 can be increased.

The magnetic circuit system 3 includes a magnetic yoke 31 fixed on the side of the support plate 26 away from the basin frame, a main magnetic steel unit 32 fixed on the magnetic yoke 31 , and a main magnetic steel unit 32 arranged at intervals on the main magnetic steel unit 32 . The peripheral side of the secondary magnetic steel unit 33 and the main magnetic steel unit 32 together to form a 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 In the secondary magnetic steel unit 33 , the inner periphery of the diaphragm 21 is fixed to the magnetic bowl 34 .

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

Claims

A sound-generating device includes a basin frame, a vibration system respectively fixed to the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and emit sound and has a magnetic gap, and the vibration system includes a vibration system fixed to the basin frame. A membrane and a voice coil inserted in the magnetic gap to drive the vibrating membrane to vibrate and sound, characterized in that:

The vibration system also includes a support plate fixed on the side of the basin frame away from the diaphragm, the support plate includes a first support portion fixed on the side of the basin frame away from the diaphragm, and the first support portion is fixed on the side of the basin frame away from the diaphragm. a second support portion extending in a direction close to the voice coil;

The vibration system further includes an elastic conductive member supported and fixed on the side of the first support portion close to the diaphragm and electrically connected with the voice coil, and an elastic conductive member supported and fixed on the second support portion close to the diaphragm Auxiliary diaphragm on one side.
The sound-generating device according to claim 1, wherein the vibration system further comprises a skeleton connecting the voice coil and the diaphragm, and the skeleton includes a structure that is attached to the diaphragm and is close to the voice coil The skeleton body on one side is bent and extended toward the magnetic gap from the end of the skeleton body away from the diaphragm, and is connected to the skeleton connecting arm of the voice coil.
The sound-generating device according to claim 2, wherein the elastic conductive member comprises a first fixing arm fixed to the first support portion, a first fixing arm extending from the first fixing arm in a direction close to the voice coil The elastic arm and the second fixed arm extended by the elastic arm, the second fixed arm is fixed on the side of the frame body away from the vibrating membrane.
The sound-generating device according to claim 3, wherein a positioning notch formed by a recess is provided at one end of the first support portion away from the second support portion, and the first fixing arm is close to one end of the support plate. The side is provided with a positioning protrusion formed protruding toward the positioning notch, and the positioning protrusion is accommodated in the positioning notch.
The sound-generating device according to claim 3, wherein the second support portion includes two and is formed by extending from opposite ends of the first support portion, and the two second support portions together enclose forming an accommodating space; the auxiliary diaphragm is accommodated in the accommodating space, and the auxiliary diaphragm includes a fold ring formed concavely in the direction close to the magnetic circuit system; a fixing part and a second fixing part, the first fixing part is fixed on the end of the second supporting part close to the accommodating space, and the second fixing part is fixed on a part of the frame body away from the diaphragm side.
The sound-emitting device according to claim 5, wherein the first fixing part comprises a first notch extending therethrough, the second fixing part comprises a second notch penetrating thereon, and the elastic arm is sequentially The first notch, the folding ring and the second notch extend toward the voice coil.
The sound-generating device according to claim 3, wherein the elastic arms comprise two and are symmetrically arranged.
The sound-generating device according to claim 1, wherein two of the support plate, the auxiliary diaphragm and the elastic conductive member are arranged correspondingly and are arranged on opposite sides of the voice coil.
The sound-generating device according to claim 1, wherein the magnetic circuit system comprises a magnetic yoke fixed on a side of the support plate away from the basin frame, a main magnetic steel unit fixed on the magnetic yoke, a spacer A secondary magnetic steel unit disposed on the peripheral side of the main magnetic steel unit and forming the magnetic gap together with the main magnetic steel unit, and a magnetic bowl covered on the main magnetic steel unit, the circumference of the magnetic bowl is The side is abutted and fixed to the secondary magnetic steel unit, the diaphragm is annular, the outer periphery of the diaphragm is fixed to the basin frame, and the inner periphery of the diaphragm is fixed to the magnetic bowl.
The sound-generating device according to claim 1, wherein the support plate is made of a metal material.