WO2022000780A1

WO2022000780A1 - Sound production device

Info

Publication number: WO2022000780A1
Application number: PCT/CN2020/114322
Authority: WO
Inventors: 梁平; 赵彬
Original assignee: 瑞声声学科技(深圳)有限公司
Priority date: 2020-06-30
Filing date: 2020-09-10
Publication date: 2022-01-06
Also published as: CN111935616A; CN111935616B

Abstract

The present invention provides a sound production device, comprising a vibration system and a magnetic circuit system having a magnetic gap and driving the vibration system to vibrate. The vibration system comprises a diaphragm for vibrating to produce sound; the diaphragm comprises a vibration part, a surround part bent and extended outward from the periphery of the vibration part, and a fixing part bent and extended from the side of the surround part away from the vibration part; the surround part has a rectangular structure having rounded corners; the surround part comprises two opposite long axis sides, two opposite short axis sides, and rounded corners connecting adjacent long axis sides and short axis sides; the diaphragm further comprises fixing raised parts protruding and extending, in a direction away from the magnetic circuit system, from the side of the rounded corner parts away from the vibration part; and the fixing raised parts are connected to the fixing part. Compared with the related art, the sound production device of the present invention improves the problems of swing and low frequency distortion during working.

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.

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 rigidity of the diaphragm is relatively low, and some products have higher requirements on rigidity and distortion, and the diaphragm structure of the prior art cannot meet the requirements of product rigidity and distortion.

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

technical solutions

The object of the present invention is to provide a sounding device which can improve the swing problem and reduce the low frequency distortion.

In order to achieve the above object, the present invention provides a sound-generating device, which includes a vibration system and a magnetic circuit system having a magnetic gap and driving the vibration system to vibrate, the vibration system including a vibrating membrane for vibrating and sounding; the vibration system The membrane includes a vibrating part, a folded ring part bent and extended outward from the periphery of the vibrating part, and a fixed part bent and extended from the side of the folded ring part away from the vibrating part; the folded ring part is in the form of a belt A rectangular structure with rounded corners, the folded ring portion includes two oppositely arranged long-axis sides, two oppositely arranged short-axis sides, and a rounded portion connecting the adjacent long-axis sides and the short-axis sides; The vibrating membrane further includes a fixing boss protruding from a side of the rounded portion away from the vibrating portion in a direction away from the magnetic circuit system, and the fixing boss is connected with the fixing portion.

Preferably, the extension direction of the protrusion of the fixing boss is the same as the extension direction of the protrusion of the folded ring portion, and the height of the protrusion of the fixing boss is less than or equal to the height of the folded ring portion.

Preferably, the bulging direction of the ring portion is parallel to the vibration direction of the diaphragm.

Preferably, the projection of the fixed boss along the vibration direction of the diaphragm falls into the vibration part and the ring part simultaneously.

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 fixing portion is connected to the top surface and the side surface 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 spaced from the main magnetic steel to form the magnetic gap, and a secondary magnetic steel covered on the magnetic yoke. The upper splint of the secondary magnet.

Preferably, the pot frame includes a pot frame body and a protruding portion formed by a side of the pot frame body close to the magnetic circuit system protruding toward the magnetic circuit system, and the upper clamp plate includes an upper clamp plate The main body, the groove part recessed from the side of the upper splint close to the basin frame to the direction away from the basin frame by the peripheral edge of the upper splint body, and the notch part recessed inward from the groove part, so The main body part of the basin frame is accommodated in the groove part so that the protruding part is inserted into the notch part.

beneficial effect

Compared with the related art, in the sound-emitting device of the present invention, the vibrating film further includes a fixed boss that protrudes and extends from the side of the rounded portion away from the vibrating portion to the direction away from the magnetic circuit system, so The fixing boss is connected with the fixing portion. When the sounding device works, with the increase of the amplitude, the setting of the fixed boss further increases the rigidity of the rounded portion, and makes the stiffness of the rounded portion approach that of the spherical top, thereby avoiding the need for The swaying problem when the diaphragm vibrates to produce sound also improves the problem of low-frequency distortion of the sound-emitting device.

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;

Fig. 3 is the three-dimensional structure schematic diagram of the vibrating film of the present invention;

FIG. 4 is a schematic diagram of the assembly of the basin frame and the upper splint according to 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 drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but 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. 1-3 at the same time, the present invention provides a sound-generating 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 membrane 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 fixed portion that is bent and extended from the side of the ring portion 112 away from the vibrating portion 111 . Section 113. In this embodiment, the protruding direction of the ring portion 112 is parallel to the vibration direction of the diaphragm 11 .

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 .

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 vibrating membrane 11 further includes a fixing boss 114 protruding from the side of the rounded portion 1123 away from the vibrating portion 111 and extending in a direction away from the magnetic circuit system 2 . The stage 114 is connected to the fixing portion 113 . When the sound-emitting device 100 works, with the increase of the amplitude, the setting of the fixed boss 114 further increases the stiffness of the rounded portion 1123, and makes the stiffness of the rounded portion 1123 approach that of the spherical top , thereby avoiding the swaying problem when the diaphragm 11 vibrates and producing sound, and also improves the problem of low-frequency distortion of the sound producing device 100 .

It should be noted that, in this embodiment, the fixing bosses 114 include four, and each of the four fixing bosses 114 has four rounded portions 1123 protruding from the side away from the vibrating portion 111 . The projection of the fixed boss 114 along the vibration direction of the diaphragm 11 falls into the vibration part 111 and the ring part 112 simultaneously. Of course, the size, quantity and position of the fixing bosses 114 can be designed according to the actual requirements of the sound emitting device 100 .

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 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 . Of course, the fixing portion 113 can also be fixed. On the magnetic circuit system 2 , the structure of the basin frame 3 may not be required at this time, which saves costs; the fixing portion 113 is connected to the top surface and the side surface of the basin frame 3 .

Specifically, 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 produce 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.

Further, the magnetic circuit system 2 includes a magnetic yoke 21 , a main magnetic steel 22 fixed to the magnetic yoke 21 , and a magnetic gap 10 formed by a main magnetic steel 22 fixed to the magnetic yoke 21 and spaced from the main magnetic steel 22 . The auxiliary magnet 23 and the upper splint 24 covered on the auxiliary magnet 23; the side of the upper splint 24 away from the auxiliary magnet 23 is connected with the bottom surface of the basin frame 3, and the elastic member 13 is fixed On the side of the upper clamping plate 24 away from the basin frame 3 , the elastic member 13 is fixed to the basin frame 3 through the upper clamping plate 24 .

Please refer to FIG. 4 , in which FIG. (4a) is an exploded schematic view of the basin frame 3 and the upper splint 24, and FIG. (4b) is a schematic diagram of the specific cooperation between the basin frame 3 and the upper splint 24, and the basin frame 3 includes the basin frame main body. 31 and the protruding portion 32 formed by the side of the basin frame main 31 close to the magnetic circuit system 2 protruding toward the magnetic circuit system 2; preferably, the basin frame 3 is rectangular, which includes The two short-axis sides 31a that are arranged oppositely and the two long-axis sides 31b that connect the two short-axis sides 31a and are oppositely arranged, the protrusions 32 include two and are respectively disposed on the two short-axis sides 21a , of course, the protruding portion 32 is not limited to this, and can also be provided on the long axis side 21b.

The upper splint 24 includes an upper splint body 241 , a groove portion 243 recessed from the upper splint 241 from the side of the upper splint 241 close to the basin frame 3 to the direction away from the basin frame 3 from the periphery of the upper splint body 241 , and Through the notch portion 242 recessed inward from the groove portion 243 , the secondary magnetic steel 23 is fixed to the part of the upper clamping plate main body 241 close to the magnetic circuit system 2 . Specifically, the groove portion 243 is provided corresponding to the short-axis side 31 a of the basin frame 3 , and the notch portion 242 is provided corresponding to the protruding portion 32 , but of course it is not limited thereto. The main body portion 31 of the basin frame is partially accommodated in the groove portion 243 and the protruding portion 32 is inserted into the notch portion 242. The setting of this structure enables the basin frame 3 and the upper plate 24 to be embedded in each other. The connection is more firm; at the same time, because the main body part 31 of the basin frame is accommodated in the groove part 243 and the protruding part 32 is inserted into the notch part 242, the space of the basin frame 3 and the upper splint 24 is utilized. The efficiency is higher, the layout is more reasonable, and the internal space of the sound-emitting device 100 is not occupied, so that the volume of the entire sound-emitting device 100 is smaller. Specifically, the two short axis sides 31 a of the basin frame 3 are partially accommodated in the groove portion 243 , and the protruding portion 32 is inserted into the notch portion 242 .

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 comprising a vibration system and a magnetic circuit system having a magnetic gap and driving the vibration system to vibrate, the vibration system comprising a vibrating film for vibrating sound; A folded ring portion is bent and extended outward from the peripheral edge of the folded portion, and a fixed portion is folded and extended from the side of the folded ring portion away from the vibrating portion; the folded ring portion has a rectangular structure with rounded corners. The ring portion includes two oppositely arranged long-axis sides, two oppositely arranged short-axis sides, and a rounded portion connecting the adjacent long-axis sides and the short-axis sides; it is characterized in that the diaphragm is further It includes a fixing boss that protrudes and extends from the side of the rounded portion away from the vibrating portion in a direction away from the magnetic circuit system, and the fixing boss is connected to the fixing portion.
The sound-emitting device according to claim 1, wherein the protrusion extending direction of the fixing boss is the same as the protrusion extending direction of the ring portion, and the protrusion height of the fixing boss is less than or equal to The height of the folded ring portion.
The sound-generating device according to claim 2, wherein the bulging direction of the ring portion is parallel to the vibration direction of the diaphragm.
The sound-emitting device according to claim 1, wherein the projection of the fixed boss along the vibration direction of the diaphragm falls into the vibration part and the ring part simultaneously.
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-generating device according to claim 7, wherein the fixing portion is connected to the top surface and the side surface 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 main magnetic steel fixed to the magnetic yoke and spaced apart from the main magnetic steel to form a The auxiliary magnetic steel of the magnetic gap and the upper splint covered on the auxiliary magnetic steel.
The sound-generating device according to claim 9, wherein the basin frame comprises a basin frame body and a side of the basin frame body close to the magnetic circuit system protruding toward the magnetic circuit system. a raised part, the upper splint includes an upper splint main body, a groove part recessed from the side of the upper splint close to the basin frame to the direction away from the basin frame by the peripheral edge of the upper splint body, and a groove part formed by the The groove part is an indented notch part, and the main body of the basin frame is accommodated in the groove part so that the protruding part is inserted into the notch part.