WO2022041458A1

WO2022041458A1 - Sound production device

Info

Publication number: WO2022041458A1
Application number: PCT/CN2020/124122
Authority: WO
Inventors: 吴军; 印兆宇; 魏威; 刘忠原
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: 2020-08-27
Filing date: 2020-10-27
Publication date: 2022-03-03
Also published as: CN112104933A

Abstract

Provided is a sound production device, which comprises a housing having an accommodating space, and a sound production unit that is accommodated in the accommodating space. The sound production unit comprises a diaphragm for vibrating to produce a sound. The housing is made of a metal material, and comprises a base and a rear shell that are respectively arranged, in a covering manner, on two opposite sides of the sound production unit in a vibration direction of the diaphragm, wherein the base and the rear shell are welded and fixed to each other, and the base is provided with a sound production port that penetrates same. The side of the sound production unit provided with the diaphragm faces toward the sound production port. The sound production device further comprises an annular support which is accommodated in the accommodating space and is wound around and fixed to a peripheral side of the sound production unit, wherein the support is made of a plastic material, and abuts against and is fixed to the side of the base close to the rear shell. The rear shell, the base, the support and the sound production unit jointly define a rear sound cavity. Compared with the prior art, the sound production device in the present invention has good reliability.

Description

sound device

technical field

The invention relates to the field of electro-acoustic conversion, in particular to a sound-generating device used in portable mobile electronic products.

Background technique

Acoustic devices, also known as speakers, are widely used in portable mobile electronic products, such as mobile phones, to convert audio signals into sound for playback.

The related art sound-generating device includes a sound-generating unit for sounding, a base and a rear case respectively covered on opposite sides of the sound-generating unit, and the base and the back cover are injection-molded and fixed by ultrasonic welding.

technical problem

However, the base and the back shell of the sound-emitting device in the related art need to be fixed by ultrasonic welding and require more space, which limits the space size of the internal cavity of the sound-emitting device.

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

technical solutions

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

In order to achieve the above object, the present invention provides a sound-generating device, which includes a housing having a receiving space and a sound-generating unit accommodated in the receiving space, the sound-generating unit including a diaphragm for vibrating and sounding, the The shell is made of metal material, which includes a base and a rear shell that are respectively covered on opposite sides of the sounding unit along the vibration direction of the diaphragm, the base and the rear shell are welded and fixed, and the base There is a sound-emitting port running through it, and the side of the sound-emitting unit with the diaphragm facing the sound-emitting port; the sound-emitting device also includes a sound-emitting device accommodated in the receiving space and wound around the sound-emitting unit. A ring-shaped bracket on the peripheral side of the body, the bracket is made of plastic material and is abutted and fixed on the side of the base close to the rear shell; the rear shell, the base, the bracket and the The vocal monomers together form the rear vocal cavity.

Preferably, the base includes a base plate located on the side of the sound-generating unit away from the rear shell, a base extension wall bent and extended from the outer periphery of the base plate toward the rear shell, and the base plate One end of the extension wall away from the base is partially welded and fixed with the peripheral side of the sound-emitting unit; the sound-emitting port is arranged through the base plate; A rear shell plate spaced from the sounding unit, and a rear shell extension wall bent and extended from the periphery of the rear shell plate towards the base, the rear shell extension wall abuts against the base extension wall and is connected with the base extension wall. The base extension wall is welded and fixed.

Preferably, the base further includes a flange formed by bending and extending the inner periphery of the base plate away from the bracket, and the flange is spaced from the monomer.

Preferably, the sound-generating device further includes a ventilating spacer located in the rear acoustic cavity, the ventilating spacer being fixed to the bracket and separating the sound-generating unit from the rear acoustic cavity.

Preferably, the air-permeable spacer includes a spacer body disposed opposite to the rear shell plate, a spacer extension portion bent and extended from the periphery of the spacer body to the bracket, and an extension portion of the spacer extending from the spacer The isolator fixing portion is bent and extended from one end of the isolator body away from the isolator body; the isolator extension portion is spaced apart from the rear shell extension wall, the isolator fixing portion is fixed to the bracket, and the ventilation isolation The component, the rear shell, the base and the bracket together form a powder filling space.

Preferably, the sound-generating unit further includes a metal basin frame for fixing the diaphragm, an end of the base plate away from the base extension wall is partially welded and fixed with the metal basin frame, and the bracket is wound around and fixed. on the metal basin frame.

Preferably, the bracket includes a first surface and a second surface that are parallel to the vibration direction of the diaphragm and are arranged opposite to each other, the first surface is fixedly connected to the metal basin frame, and the second surface is connected to the The base extension walls are spaced apart.

Preferably, the bracket further comprises a third surface connected to the first surface and the second surface, a fourth surface connected to the second surface and spaced apart from the third surface, and a fourth surface connected to the second surface One side faces the fifth side extending obliquely from the fourth side; the air-permeable spacer is fixed on the third side, and the base plate is fixed on the fourth side.

Preferably, the sound-generating device further includes a conductive member that connects the sound-generating unit with an external electrical signal, the conductive member includes a conductive member body supported and fixed on one end of the bracket close to the rear case, and the conductive member is supported by the conductive member. The two ends of the body body extend toward the sound-generating unit and are fixed and electrically connected to the connecting arm, and the conductor body extends away from the sound-generating unit and penetrates the casing arm; the side of the bracket close to the rear case is recessed to form a receiving groove, and the conductive element body is arranged in the receiving groove so that the conductive element body and the side of the bracket close to the rear case are flat The spacer fixing portion is press-fitted and fixed to the conductive element body and the bracket at the same time.

Preferably, the sound-emitting device further includes a rubber ring attached to a side of the base plate away from the sound-emitting unit, and the rubber ring is arranged around the sound-emitting port.

Preferably, the rubber ring is a double-sided tape.

beneficial effect

Compared with the related art, in the sound-emitting device of the present invention, it includes a casing with a receiving space and a sound-producing unit contained in the receiving space. On the opposite sides of the monomer, brackets are added to fix the sound-emitting monomer. At the same time, the bracket and the base are fixed, and the rear shell, the base, the bracket and the sound-emitting monomer together form a rear sound cavity. The bracket is made of plastic material, and the shell is made of metal material; without increasing the external size, the space of the rear acoustic cavity is increased, so that the acoustic effect of the sound-emitting device is better; in addition, the rear shell It is welded and fixed with the base, and the reliability is better.

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;

Fig. 2 is the partial three-dimensional structure exploded schematic diagram of the sounding device of the present invention;

Fig. 3 is a sectional view along line A-A in Fig. 1;

FIG. 4 is an enlarged view of the portion indicated by B in FIG. 3 .

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. 1-4 at the same time, the present invention provides a sound-generating device 100, which includes a housing 1 having a housing space 10, a sound-generating unit 2 housed in the housing space 10, a bracket 3, a ventilating spacer 4, Conductor 5 and rubber ring 6 .

The sound-generating unit 2 includes a metal pot frame 22 and a diaphragm 21 fixed on the metal pot frame 22 and used for vibrating and producing sound.

Specifically, the casing 1 includes a base 11 and a rear casing 12. The base 11 and the rear casing 12 are fixed by welding and are respectively covered on opposite sides of the sounding unit 2 along the vibration direction of the diaphragm 21. In this embodiment The base 11 and the rear shell 12 are covered on opposite sides of the metal basin frame 22 along the vibration direction of the diaphragm 21. The base 11 and the rear shell 12 are both made of metal materials, so that the entire shell 1 becomes Thin, further increases the size of the receiving space 10 .

The base 11 includes a base plate 111 fixed on the side of the sounding unit 2 away from the rear shell 12 , and a base extension wall 112 bent and extended from the outer periphery of the base plate 111 toward the rear shell 12 . and a flange 113 formed by bending and extending the inner periphery of the base plate 111 away from the bracket 3 , the flange 113 and the unit 2 are spaced apart; the base plate 111 extends away from the base One end of the wall 112 is partially welded and fixed with the peripheral side of the metal basin frame 22, which has better reliability. The side of the sound-generating unit 2 with the diaphragm 21 faces the sound-emitting port 1110 to emit sound.

The rear shell 12 includes a rear shell plate 121 located on the side of the sound-generating unit 2 away from the base 11 and spaced from the sound-generating unit 2 . The rear shell extension wall 122 is bent and extended. Specifically, the extension direction of the rear case extension wall 122 is parallel to the vibration direction of the diaphragm 21 , the extension direction of the base extension wall 112 is parallel to the vibration direction of the diaphragm 21 , and the rear case extension wall 122 abuts against the vibration direction of the diaphragm 21 . The base extension wall 112 is welded and fixed with the base extension wall 112, and the reliability is better.

The bracket 3 is annular and is glued and fixed with the sounding unit 2. The bracket 3 is accommodated in the accommodation space and is wound around and fixed on the peripheral side of the metal basin frame 22. The bracket 3 is abutted and fixed on the The base plate 111 is close to one side of the rear case 12 and is spaced apart from the extension wall 112 of the rear case.

Specifically, the bracket 3 is made of plastic material, and the bracket 3 includes a first surface 31 and a second surface 32 that are parallel to the vibration direction of the diaphragm 21 and are opposite to each other. The metal basin frame 22 is fixedly connected, and the second surface 32 is spaced from the base extension wall 112 ; the bracket 3 further includes a third surface 33 connecting the first surface 31 and the second surface 32, a fourth surface 34 connected to the second surface 32 and spaced apart from the third surface 33 and a fifth surface 35 extending obliquely from the first surface 31 to the fourth surface 34; the ventilation isolation The component 4 is fixed on the third surface 33 , and the base plate 111 is fixed on the fourth surface 35 . That is, by arranging the bracket 3 , the bracket 3 is inclined and arranged corresponding to the fifth surface 35 of the diaphragm 21 , which is beneficial to the sound output of the sound generating unit 2 and has a better sound output effect.

In this embodiment, the rear shell plate 121 , the rear shell extension wall 122 , the base extension wall 112 , the base plate 111 , the bracket 3 and the sounding unit 2 together form a rear sound cavity 20 . So far, the sound-generating device 100 of the present invention forms a relatively closed rear acoustic cavity structure, which is simple in structure and improves the acoustic performance of the sound-generating device 100, especially the low-frequency acoustic performance.

The air-permeable spacer 4 is located in the rear acoustic cavity 20 , which is fixed to the bracket 3 and separates the sound-generating unit 1 from the rear acoustic cavity 20 .

Specifically, the ventilating spacer 4 includes a spacer body 41 disposed opposite to the rear shell plate 121 , a spacer extending portion 42 bent and extending from the periphery of the spacer body 41 to the bracket 3 , and The spacer fixing portion 43 is bent and extended from one end of the spacer extension portion 42 away from the spacer body 41 ; the spacer extension portion 42 is spaced apart from the rear case extension wall 122 , and the spacer is fixed The part 43 is fixed to the bracket, and the air-permeable spacer 4 together with the rear shell 12 , the base 11 and the bracket 3 together form a powder filling space 30 .

The rubber ring 6 is attached to the side of the base plate 111 away from the sounding unit 2 , and the rubber ring 6 is arranged around the sounding port 1110 . The sound-emitting device 100 is assembled and sealed with the whole machine through the rubber ring 6 . Specifically, the rubber ring 6 is a double-sided adhesive tape.

The housing 1 includes a gap 13 extending therethrough. The sound-generating device 100 further includes a conductive member 5 that connects the sound-generating unit 2 with an external electrical signal. The conductive member 5 includes a support and fixed to the bracket 3 The conductor body 51 close to one end of the rear case 12 , the connecting arm 52 extending from the two ends of the conductor body 51 toward the sound-generating unit 2 and being fixed and electrically connected to the sound-generating unit 2 , and the connecting arm 52 . The conductive member body 51 extends away from the sounding unit 2 and passes through the extension arm 53 of the gap 13 ; the side of the bracket 3 close to the rear shell 12 is recessed to form a receiving groove 3a, and the conductive member body 51 is disposed in the receiving groove 3a so that the conductive member body 51 is flush with the side of the bracket 3 close to the rear shell 12, and the spacer fixing portion 43 is pressed and fixed to the conductive member at the same time. The main body 51 and the bracket 3 .

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 housing with a housing space and a sound-generating unit accommodated in the housing space, the sound-generating unit comprising a diaphragm for vibrating and producing sound, and characterized in that the housing is made of a metal material It consists of a base and a rear shell that are respectively covered on opposite sides of the sounding unit along the vibration direction of the diaphragm, the base and the rear shell are welded and fixed, and the base is provided with a pass through the The sound-emitting port, the side of the sound-emitting unit with the diaphragm facing the sound-emitting port; the sound-emitting device further includes a sound-emitting device accommodated in the receiving space and wound around and fixed on the peripheral side of the sound-emitting unit. A ring-shaped bracket, the bracket is made of plastic material and is abutted and fixed on the side of the base close to the rear shell; the rear shell, the base, the bracket and the sounding unit together enclose After the vocal cavity.
The sound-generating device according to claim 1, wherein the base comprises a base plate on the side of the sound-generating unit away from the rear shell, and is bent toward the rear shell from the outer periphery of the base plate The base extension wall is folded and extended, and one end of the base plate away from the base extension wall is partially welded and fixed to the peripheral side of the sound-emitting unit; the sound-emitting port is arranged through the base plate; The sound-generating unit is far from the base and is spaced from the sound-generating unit, and the rear shell extends from the periphery of the rear shell to the base. The rear shell extends The wall abuts against the base extension wall and is welded and fixed with the base extension wall.
The sound-emitting device according to claim 2, wherein the base further comprises a flange formed by bending and extending the inner periphery of the base plate away from the bracket, the flange and the single body interval setting.
The sound-generating device according to claim 2, characterized in that, the sound-generating device further comprises a ventilating spacer located in the rear acoustic cavity, the ventilating spacer being fixed to the bracket and removing the sound-generating unit from the sound-generating unit. After the vocal cavity is separated.
The sound-generating device according to claim 4, wherein the air-permeable spacer comprises an spacer body disposed opposite to the rear shell plate at intervals, and a spacer body is bent and extended from the periphery of the spacer body to the bracket. a spacer extension part and a spacer fixing part bent and extended from one end of the spacer extension part away from the spacer body; the spacer extension part is spaced apart from the rear shell extension wall, and the spacer is fixed The part is fixed to the bracket, and the ventilation spacer, the rear shell, the base and the bracket together form a powder filling space.
The sound-generating device according to claim 4, wherein the sound-generating unit further comprises a metal basin frame for fixing the diaphragm, and an end of the base plate away from the base extension wall is connected to the metal basin The frame is partially welded and fixed, and the bracket is wound around and fixed on the metal basin frame.
The sound-generating device according to claim 6, wherein the bracket comprises a first surface and a second surface that are parallel to the vibration direction of the diaphragm and are arranged opposite to each other, the first surface and the metal basin frame In a fixed connection, the second surface is spaced apart from the base extension wall.
The sound-generating device according to claim 7, wherein the bracket further comprises a third surface connected to the first surface and the second surface, connected to the second surface and connected to the third surface a fourth surface arranged at intervals and a fifth surface extending obliquely from the first surface to the fourth surface; the breathable spacer is fixed to the third surface, and the base plate is fixed to the fourth surface.
The sound-generating device according to claim 5, characterized in that, the sound-generating device further comprises a conductive member for connecting the sound-generating unit with an external electrical signal, and the conductive member comprises a support and a fixed position on the bracket close to the rear A conductor body at one end of the shell, a connecting arm extending from both ends of the conductor body toward the sounding unit and being fixed and electrically connected to the sounding unit, and a connecting arm extending from the conductor body to the sounding unit away from the sounding unit an extension arm extending in the direction of the body and passing through the casing; a side of the bracket close to the rear casing is recessed to form a receiving groove, and the conductive part body is arranged in the receiving groove so that the conductive part body is connected to the receiving groove. A side of the bracket close to the rear case is flush, and the spacer fixing portion is simultaneously press-fitted and fixed to the conductive member body and the bracket.
The sound-generating device according to claim 1, characterized in that, the sound-generating device further comprises a rubber ring attached to a side of the base plate away from the sound-generating unit, and the rubber ring is arranged around the sound-emitting port.
The sound-emitting device according to claim 10, wherein the rubber ring is a double-sided tape.