WO2022041471A1

WO2022041471A1 - Sound production device

Info

Publication number: WO2022041471A1
Application number: PCT/CN2020/125480
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: 2020-10-30
Publication date: 2022-03-03
Also published as: CN112153503A; CN112153503B

Abstract

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 sound. The housing is made of a metal material and comprises a base and a rear shell, wherein the base is provided with a sound production port that penetrates same. The base comprises: an annular base plate; a base extension wall that bends and extends from the outer periphery of the base plate to the rear shell; an auxiliary extension wall that bends and extends from the inner periphery of the base plate to the rear shell; and a flange that bends and extends from the auxiliary extension wall, wherein the flange is welded and fixed to a peripheral side of the sound production unit. The flange is annular and defines the sound production port; the diaphragm extends outwards through the sound production port and is exposed outside of the housing; the auxiliary extension wall, the flange and the sound production unit jointly define a glue dispensing groove; and the rear shell, the base and the sound production unit jointly define a rear sound cavity.

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

Sound-emitting 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 sound-emitting devices have large loudness and amplitude.

The related art sound-generating device includes a sound-generating unit for sounding, a base and a back shell respectively covered on opposite sides of the sound-generating unit, the base and the back shell together form a receiving space, the base and The rear shell is injection-molded and fixed by ultrasonic welding.

technical problem

However, if the base and the back shell of the sound-emitting device in the related art need to be fixed by ultrasonic welding, more space is required, 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 better acoustic effect.

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, and includes a base and a rear shell that are respectively covered on opposite sides of the sound-generating unit along the vibration direction of the diaphragm, and the base is provided with a sound-emitting port passing through it;

The base includes a ring-shaped base plate, a base extension wall that is bent and extended from the outer periphery of the base plate to the rear shell, and is bent and extended from the inner periphery of the base plate to the rear shell. an auxiliary extension wall arranged at intervals from the base extension wall, and a flange that is bent and extended toward the sound-emitting unit from the end of the auxiliary extension wall away from the base plate, and the flange is connected to the sound-emitting unit. Welding and fixing on the peripheral side of the flange; the flange is annular and surrounds the sounding port, the diaphragm extends outward through the sounding port and is exposed to the shell, the auxiliary extension wall, the flip The edge and the sounding monomer together form a dispensing groove;

The rear shell, the base and the sound-generating unit together form a rear sound cavity.

Preferably, a sealing ring is arranged in the glue dispensing groove to seal the base and the sounding unit.

Preferably, the rear shell includes a rear shell plate located on the side of the sound-generating unit away from the base and spaced from the sound-generating unit, and a rear shell plate that is bent and extended from the periphery of the rear shell plate toward the base. The rear shell extension wall is abutted against the base extension wall and is welded and fixed with the base extension wall.

Preferably, the sound-generating unit is at least partially exposed to the casing.

Preferably, the sealing ring is formed by filling glue into the glue dispensing groove.

Preferably, the sound-generating device further includes a ventilating spacer located in the rear acoustic cavity, the ventilating spacer being fixed to the flange 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 base, and an extension portion of the spacer extending from the spacer The isolator fixing part is bent and extended from one end of the isolator body away from the isolator body; the isolator extension part is spaced apart from the rear shell extension wall, the isolator fixing part is fixed on the flange, and the ventilation The spacer, the rear shell and the base together form a powder filling space.

Preferably, the sound-generating device further includes a rubber ring attached to the side of the base plate away from the sound-generating unit.

Preferably, the rubber ring is made of double-sided tape.

Preferably, the sound-generating device further includes a conductive member extending through the casing to the sound-generating unit and electrically connected to the sound-generating unit.

Preferably, the conductive member comprises a conductive member body, a connecting arm extending from both ends of the conductive member body towards the sound-generating unit and being fixed and electrically connected to the sound-generating unit, and a connection arm extending from the conductive member body to the sound-generating unit. An extension arm extending away from the sounding unit and passing through the housing.

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 unit, at the same time, the flanges are welded and fixed to the peripheral side of the sound-emitting unit, and the rear shell, the base and the sound-emitting unit together form a rear sound cavity, and the shell is composed of It is made of metal material; without increasing the external size, the space of the rear acoustic cavity is enlarged, so that the acoustic effect of the sound-emitting device is better; the auxiliary extension wall, the flange and the sound-emitting monomer are jointly surrounded by The dispensing groove is used to accommodate the sealing ring, so that the sealing between the shell and the sounding unit is better, and it does not occupy space, and the space utilization rate is high; in addition, the flange is welded with the peripheral side of the sounding unit Fixing, the reliability is better; only the base and the rear shell are used to realize the fixing to the sounding monomer, and to form the rear sound cavity, the parts are minimized, and the cost is saved.

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 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 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. 1-3 at the same time, the present invention provides a sound-generating device 100 , which includes a housing 1 having an accommodation space 10 , a sound-generating unit 2 accommodated in the accommodation space 10 , a ventilating spacer 4 , and a conductive member 5 and apron 6.

The sound-generating unit 2 includes a metal basin frame 22 and a diaphragm 21 fixed to the metal basin frame 22 and used for vibrating and sounding.

Specifically, the casing 1 includes a base 11 and a rear casing 12 . The base 11 and the rear casing 12 are respectively covered on opposite sides of the sounding unit 2 along the vibration direction of the diaphragm 21 . The rear shell 12 is covered on opposite sides of the metal basin frame 22 along the vibration direction of the diaphragm 21 , and the base 11 is provided with a sound outlet 1110 passing through it; the base 11 and the rear shell 12 are made of It is made of metal material, so that the entire casing 1 becomes thinner, which further increases the size of the receiving space 10 .

The base 11 is provided with a ring-shaped base plate 111 located on the side of the sound-generating unit 2 away from the rear shell 12 . The base extension wall 112 , the auxiliary extension wall 113 which is bent and extended from the inner periphery of the base plate 111 toward the rear shell 12 and is spaced from the base extension wall 112 , and the auxiliary extension wall 113 is away from the base extension wall 113 . One end of the base plate 111 is a flange 114 that is bent and extended toward the sounding unit 2, and the flange 114 is welded and fixed to the peripheral side of the sounding unit 2; the flange 114 is annular and surrounds The sounding port 1110, the diaphragm 21 extends outward through the sounding port 1110 and is exposed to the housing 1, the auxiliary extension wall 113, the flange 114 and the sounding unit 2 are jointly enclosed by Dispensing tank 14a. A sealing ring 141a is arranged in the dispensing groove 14a to seal the base 11 and the sounding unit 2, so that the sealing between the housing 1 and the sounding unit 2 is better, and it does not occupy space, and the space utilization rate is high; The sealing ring 141a can also be used for assembling with the whole machine to save material.

Preferably, the sealing ring 141a is formed by filling the glue dispensing groove 14a with glue. The sound-generating unit 2 is at least partially exposed to the casing 1 , that is, the diaphragm 21 is exposed to the casing 1 , so that the sound-emitting effect of the diaphragm 21 is better.

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 rear case extension wall 122 abuts against the base extension wall 112 and is welded and fixed to the base extension wall 112 , which is reliable Sex is better.

In this embodiment, the rear shell 12 , the base 11 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. In this embodiment, a leakage portion 23 is further provided on the side of the sound generating unit 2 away from the diaphragm 21 , and the leakage portion 23 communicates with the rear acoustic cavity 20 .

The ventilating spacer 4 is located in the rear acoustic cavity 20 , which is fixed to the flange 114 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 extension 42 bent and extending from the periphery of the spacer body 41 to the base 11 , 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 on the flange 114 , and the air-permeable spacer 4 , the rear shell 12 and the base 11 together form a powder filling space 30 , and the filling powder 30 can be used to encapsulate the sound-absorbing particles and improve the sound quality of the sound-emitting device 100 . acoustic effects.

The rubber ring 6 is attached to the side of the base plate 111 away from the sounding unit 2, and the sounding device 100 is assembled and sealed with the whole machine through the rubber ring 6. Preferably, the rubber ring 6 is a double-sided adhesive tape. production.

The housing 1 includes a gap 13a extending therethrough, and the sound-generating device 100 further includes a conductive member 5 extending toward the sound-generating unit 2 through the gap 13a and electrically connected to the sound-generating unit 2 .

Specifically, the conductive member 5 includes a conductive member body 52 , a connecting arm 53 extending from both ends of the conductive body 52 toward the sound-generating unit 2 and being fixed and electrically connected to the sound-generating unit 2 , and a connecting arm 53 . The conductor body 52 extends away from the sounding unit 2 and passes through the extension arm 51 of the gap 13a. Through the structural design of the conductive member 5 , the entire conductive member 5 occupies less space in the sound-generating device 100 , and at the same time, the electrical connection with the sound-generating unit 2 is realized, and the space utilization rate is higher.

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 unit, at the same time, the flanges are welded and fixed to the peripheral side of the sound-emitting unit, and the rear shell, the base and the sound-emitting unit together form a rear sound cavity, and the shell is composed of It 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; the auxiliary extension wall, the flange and the sound-emitting monomer are jointly enclosed by The dispensing groove is used to accommodate the sealing ring, so that the sealing between the shell and the sounding unit is better, and it does not occupy space, and the space utilization rate is high; in addition, the flange is welded with the peripheral side of the sounding unit Fixed, better reliability; only the base and the rear shell are used to achieve the fixation with the sounding monomer, and to form the rear sound cavity, the parts are minimized, and the cost is saved.

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 includes a base and a rear shell that are respectively covered on opposite sides of the sound-generating unit along the vibration direction of the diaphragm, and the base is provided with a sound-emitting port passing through it;

The base includes a ring-shaped base plate, a base extension wall that is bent and extended from the outer periphery of the base plate to the rear shell, and is bent and extended from the inner periphery of the base plate to the rear shell. an auxiliary extension wall arranged at intervals from the base extension wall, and a flange that is bent and extended toward the sound-emitting unit from the end of the auxiliary extension wall away from the base plate, and the flange is connected to the sound-emitting unit. Welding and fixing on the peripheral side of the flange; the flange is annular and surrounds the sounding port, the diaphragm extends outward through the sounding port and is exposed to the shell, the auxiliary extension wall, the flip The edge and the sounding monomer together form a dispensing groove;

The rear shell, the base and the sound-generating unit together form a rear sound cavity.
The sound-generating device according to claim 1, wherein a sealing ring is arranged in the glue dispensing groove to seal the base and the sound-generating unit.
The sound-generating device according to claim 1, wherein the rear shell comprises a rear shell plate which is located on the side of the sound-generating unit away from the base and is spaced from the sound-generating unit, and is formed by the rear shell plate. The rear shell extension wall is bent and extended toward the base direction from the peripheral edge, and the rear shell extension wall abuts the base extension wall and is welded and fixed with the base extension wall.
The sound-generating device according to claim 1, wherein the sound-generating unit is at least partially exposed from the casing.
The sound-emitting device according to claim 1, wherein the sealing ring is formed by filling glue into the glue dispensing groove.
The sound-generating device according to claim 1, 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 flange and separating the sound-generating unit from the sound-generating unit. The rear acoustic cavity is separated.
The sound-generating device according to claim 6, wherein the air-permeable spacer comprises a spacer body disposed opposite to the rear shell plate, a spacer body bent and extended from the periphery of the spacer body to the base 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 air-permeable spacer, the rear shell and the base together form a powder filling space.
The sound-generating device according to claim 1, wherein the sound-generating device further comprises a rubber ring attached to a side of the base plate away from the sound-generating unit.
The sound-emitting device according to claim 8, wherein the rubber ring is made of double-sided tape.
The sound-generating device according to claim 1, wherein the sound-generating device further comprises a conductive member extending through the casing to the sound-generating unit and electrically connected with the sound-generating unit.
The sound-generating device according to claim 10, wherein the conductive member comprises a conductive member body, which extends from both ends of the conductive body towards the sound-generating unit and is fixed and electrically connected to the sound-generating unit. The connecting arm and the extending arm extending away from the sounding unit from the conductive element body and penetrating the casing.