WO2022000781A1

WO2022000781A1 - Sound production apparatus

Info

Publication number: WO2022000781A1
Application number: PCT/CN2020/114323
Authority: WO
Inventors: 梁平; 赵彬
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: 2020-06-30
Filing date: 2020-09-10
Publication date: 2022-01-06
Also published as: CN213094478U

Abstract

The present utility model provides a sound production apparatus, comprising a vibration system and a magnetic circuit system driving the vibration system to vibrate. The vibration system comprises a diaphragm for vibrating to produce sound; the diaphragm comprises a vibration portion, a folding ring portion which is bent outward and extends from the periphery of the vibration portion, and a fixed portion which is bent and extends from the side of the folding ring portion distant from the vibration portion and is fixed relative to the magnetic circuit system; and a sunken portion is provided on the side of the folding ring portion close to the fixed portion and/or the side of the folding ring part close to the vibration portion. Compared with the related art, the sound production apparatus of the present utility model improves the resonant frequency while reducing low-frequency distortion.

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.

A related art sound-generating device includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system having a magnetic gap and driving the vibration system to vibrate. The vibration system includes a diaphragm for vibrating and producing sound.

technical problem

However, in the sound-emitting device of the related art, the width of the ring portion of the diaphragm is limited, and some products have higher requirements on stiffness and distortion, and the diaphragm structure of the prior art cannot meet the requirements of product stiffness and distortion.

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

technical solutions

The purpose of the utility model is to provide a sounding device which can increase the resonance frequency and reduce the low frequency distortion.

In order to achieve the above purpose, the present invention provides a sound-generating device, which includes a vibration system and a magnetic circuit system that drives the vibration system to vibrate, the vibration system includes a vibrating membrane for vibrating and producing sound; the vibration membrane includes a vibrating membrane. a folded ring part which is bent and extended outwards from the periphery of the vibrating part; A concave portion is provided on the side of the folded ring portion close to the fixed portion and/or on the side of the folded ring portion close to the vibrating portion.

Preferably, the folded ring portion has a rectangular structure with rounded corners, and the folded ring portion includes two oppositely arranged long-axis sides, two oppositely arranged short-axis sides and a connection between the adjacent long-axis sides and all the adjacent long-axis sides. the rounded portion of the short-axis side; the concave portion is arranged on the long-axis side and/or the short-axis side.

Preferably, the concave direction of the concave portion is different from the convex direction of the ring portion.

Preferably, the concave direction of the concave portion is opposite to the convex direction of the ring portion.

Preferably, the diaphragm is made of any one of silica gel, rubber, polyetheretherketone and thermoplastic polyurethane elastomer rubber.

Preferably, the vibrating membrane further includes a spherical top, the vibrating portion is provided with a through hole therethrough, and the spherical top is attached to a side of the vibrating portion away from the magnetic circuit system and completely covers the vibrating portion. through hole.

Preferably, the sounding device further includes a basin frame, and the fixing portion and the magnetic circuit system are respectively fixed on opposite sides of the basin frame.

Preferably, the magnetic circuit system includes a magnetic yoke, a main magnetic steel fixed on the magnetic yoke, a secondary magnetic steel fixed on the magnetic yoke and separated from the main magnetic steel to form a magnetic gap, and a secondary magnetic steel covered on the magnetic yoke. The upper splint of the secondary magnet.

beneficial effect

Compared with the related art, in the sound-emitting device of the present invention, a concave portion is provided on the side of the ring portion close to the fixing portion and/or the side of the ring portion near the vibration portion. The arrangement of this structure reduces the loop width of the loop portion, that is, reduces the vibration area of the loop portion, thereby increasing the resonance frequency of the sound-emitting device and reducing low-frequency distortion. The rounded portion of the folded ring portion is not provided with a concave structure, which ensures the rigidity of the diaphragm, thereby effectively avoiding the problem of rocking when the diaphragm vibrates and emits sound.

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;

FIG. 3 is a cross-sectional view taken along line A-A in FIG. 1 .

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.

1-3 at the same time, the present invention provides a sound-emitting device 100, which includes a vibration system 1 and a magnetic circuit system 2 having a magnetic gap 10 and driving the vibration system 1 to vibrate.

The vibration system 1 includes a diaphragm 11 for vibrating and producing sound;

The vibrating film 11 includes a vibrating portion 111 , a ring portion 112 that is bent and extended outward from the periphery of the vibrating portion 111 , and a side of the ring portion 112 that is bent and extended away from the vibrating portion 111 and is extended with the vibrating portion 111 . The magnetic circuit system 2 is relatively fixed to the fixed portion 113 .

In this embodiment, a concave portion 114 is provided on the side of the ring portion 112 close to the fixing portion 113 and/or the side of the ring portion 112 near the vibration portion 111 . The arrangement of this structure reduces the loop width of the loop portion 112 , that is, reduces the vibration area of the loop portion 122 , thereby increasing the resonance frequency of the sound-emitting device 100 and reducing low-frequency distortion.

Specifically, the folded ring portion 112 has a rectangular structure with rounded corners. the rounded corners 1123 of the long-axis side 1121 and the short-axis side 1122.

In this embodiment, the recessed portion 114 is disposed on the side of the long-axis side 1121 and/or the short-axis side 1122 that is close to the fixing portion 113 , and the recessed portion 114 is recessed in the same direction as the folding ring. The convex directions of the parts 112 are different, and the concave direction of the concave part 114 is opposite to the convex direction of the ring part 112 . Certainly, the recessed portion 114 may also be disposed on the side of the long-axis side 1121 and/or the short-axis side 1122 close to the vibrating portion 111 , and the specific position thereof can be set according to actual conditions.

It should be noted that, in the above structure, the recessed portion 114 is provided on the long-axis side 1121 and/or the short-axis side 1122, but the rounded portion 1123 is not provided with a recessed structure, the purpose of which is to ensure the diaphragm The stiffness of the diaphragm 11 can be effectively avoided when the vibrating membrane 11 vibrates and sounds.

In this embodiment, the diaphragm 11 is made of any one of silicone, rubber, polyetheretherketone, and thermoplastic polyurethane elastomer rubber. Of course, it is not limited to this, and the diaphragm 11 can also be made of other polymer materials.

In order to increase the vibration effect of the diaphragm, the acoustic performance of the sound generating device 100 is further improved. In this embodiment, the vibrating membrane 11 further includes a dome 115 , the vibrating portion 111 is provided with a through hole 1111 therethrough, and the dome 115 is attached to the vibrating portion 111 away from the magnetic circuit One side of the system 2 and completely cover the through hole 1111 .

In this embodiment, the sounding device 100 further includes a basin frame 3 , and the fixing portion 113 and the magnetic circuit system 2 are respectively fixed on opposite sides of the basin frame 3 .

Specifically, the magnetic circuit system 2 includes a magnetic yoke 21 , a main magnetic steel 22 fixed to the magnetic yoke 21 , a secondary magnetic steel fixed to the magnetic yoke 21 and spaced from the main magnetic steel 22 to form a magnetic gap 10 . The steel 23 and the upper clamping plate 24 covered on the auxiliary magnetic steel 23 .

Further, the vibration system 1 further includes a voice coil 12 inserted in the magnetic gap 10 to drive the vibrating membrane 11 to vibrate and sound, and a voice coil 12 fixed to the basin frame 3 and electrically connected to the voice coil 12 . Elastic member 13 . In this embodiment, the elastic member 13 is a flexible circuit board.

More preferably, in order to suppress the lateral sway of the voice coil 12 , in this embodiment, the vibration system 1 further includes an auxiliary diaphragm 14 attached to the side of the elastic member 13 away from the diaphragm.

Compared with the related art, in the sound-emitting device of the present invention, a concave portion is provided on the side of the ring portion close to the fixing portion and/or the side of the ring portion near the vibration portion. The arrangement of this structure reduces the loop width of the loop portion, that is, reduces the vibration area of the loop portion, thereby increasing the resonance frequency of the sound-emitting device and reducing low-frequency distortion. The rounded portion of the ring portion is not provided with a concave structure, which ensures the rigidity of the diaphragm, thereby effectively avoiding the problem of rocking when the diaphragm vibrates and emits sound.

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 vibration system and a magnetic circuit system for driving the vibration system to vibrate, the vibration system comprising a vibrating membrane for vibrating sound; A folded ring portion that is bent and extended from the outside and a fixed portion that is bent and extended from the side of the folded ring portion away from the vibrating portion and is relatively fixed to the magnetic circuit system, characterized in that the folded ring portion is close to the A concave portion is provided on one side of the fixing portion and/or the side of the ring portion close to the vibrating portion.
The sound-generating device according to claim 1, wherein the folded ring portion has a rectangular structure with rounded corners, and the folded ring portion comprises two oppositely arranged long-axis sides and two oppositely arranged short-axis sides and a rounded portion connecting the adjacent long-axis side and the short-axis side; the recessed portion is arranged on the long-axis side and/or the short-axis side.
The sound-emitting device according to claim 2, wherein the concave direction of the concave portion is different from the convex direction of the ring portion.
The sound-emitting device according to claim 3, wherein the concave direction of the concave portion is opposite to the convex direction of the ring portion.
The sound-emitting device according to claim 1, wherein the diaphragm is made of any one of silica gel, rubber, polyether ether ketone and thermoplastic polyurethane elastomer rubber.
The sound-generating device according to claim 1, wherein the vibrating membrane further comprises a dome, the vibrating portion is provided with a through hole therethrough, and the dome is attached to the vibrating portion away from the one side of the magnetic circuit system and completely cover the through hole.
The sound-generating device according to claim 6, characterized in that, the sound-generating device further comprises a basin frame, and the fixing part and the magnetic circuit system are respectively fixed on opposite sides of the basin frame.
The sound-emitting device according to claim 7, wherein the magnetic circuit system comprises a magnetic yoke, a main magnetic steel fixed to the magnetic yoke, a magnetic steel fixed to the magnetic yoke and spaced apart from the main magnetic steel to form a magnetic The auxiliary magnetic steel in the gap and the upper splint covered on the auxiliary magnetic steel.