CN112104933B

CN112104933B - Sounding device

Info

Publication number: CN112104933B
Application number: CN202010879442.3A
Authority: CN
Inventors: 吴军; 印兆宇; 魏威; 刘忠原
Original assignee: AAC Microtech Changzhou Co Ltd; Science and Education City Branch of AAC New Energy Development Changzhou Co Ltd
Current assignee: AAC Microtech Changzhou Co Ltd; Science and Education City Branch of AAC New Energy Development Changzhou Co Ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2024-07-16
Anticipated expiration: 2040-08-27
Also published as: CN112104933A; WO2022041458A1

Abstract

The invention provides a sound production device which comprises a shell with an accommodating space and a sound production monomer accommodated in the accommodating space, wherein the sound production monomer comprises a vibrating diaphragm for vibrating and producing sound, the shell is made of a metal material and comprises a base and a rear shell which are respectively covered on two opposite sides of the sound production monomer along the vibrating direction of the vibrating diaphragm, the base and the rear shell are welded and fixed, the base is provided with a sound production opening penetrating through the base, and one side of the sound production monomer provided with the vibrating diaphragm faces the sound production opening; the sound generating device further comprises a ring-shaped bracket which is accommodated in the accommodating space and is fixedly wound on the periphery of the sound generating unit, and the bracket is made of plastic materials and is fixedly abutted against one side, close to the rear shell, of the base; the rear shell, the base, the bracket and the sounding monomer jointly enclose a rear sound cavity. Compared with the related art, the sound generating device has good reliability.

Description

Sounding device

[ Field of technology ]

The invention relates to the field of electroacoustic conversion, in particular to a sounding device applied to a portable mobile electronic product.

[ Background Art ]

The sound generating device is also called a loudspeaker, is widely applied to portable mobile electronic products, such as mobile phones, and can convert audio signals into sound for playing, and the sound generating device has high loudness and amplitude.

The sounding device of the related art comprises a sounding monomer used for sounding, a base and a rear shell, wherein the base and the rear shell are respectively arranged on two opposite sides of the sounding monomer in a covering mode, and the base and the rear shell are formed by injection molding and are fixed through ultrasonic welding.

However, the base and the rear case of the related art sound emitting device require more space for fixing by ultrasonic welding, which limits the space size of the internal cavity of the sound emitting device.

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

[ Invention ]

The invention aims to provide a sound generating device with high space utilization rate and better reliability.

In order to achieve the above purpose, the invention provides a sound production device, which comprises a shell with an accommodating space and a sound production unit accommodated in the accommodating space, wherein the sound production unit comprises a vibrating diaphragm for vibrating sound production, the shell is made of a metal material and comprises a base and a rear shell which are respectively covered on two opposite sides of the sound production unit along the vibrating direction of the vibrating diaphragm, the base is welded and fixed with the rear shell, the base is provided with a sound production opening penetrating through the base, and one side of the sound production unit provided with the vibrating diaphragm faces the sound production opening; the sound generating device further comprises a ring-shaped bracket which is accommodated in the accommodating space and is fixedly wound on the periphery of the sound generating unit, and the bracket is made of plastic materials and is fixedly abutted against one side, close to the rear shell, of the base; the rear shell, the base, the bracket and the sounding monomer jointly enclose a rear sound cavity.

Preferably, the base comprises a base plate positioned at one side of the sounding monomer far away from the rear shell and a base extension wall bent and extended from the outer periphery of the base plate to the rear shell direction, and one end of the base plate far away from the base extension wall is fixed with the periphery of the sounding monomer in a local welding way; the sound producing port penetrates through the base plate; the back shell comprises a back shell plate which is positioned at one side of the sounding monomer away from the base and is spaced from the sounding monomer, and a back shell extending wall which is bent and extended from the periphery of the back shell plate to the direction of the base, wherein the back shell extending wall is abutted to the base extending wall and welded and fixed with the base extending wall.

Preferably, the base further comprises a flange formed by bending and extending the inner periphery of the base plate in a direction away from the bracket, and the flange and the single body are arranged at intervals.

Preferably, the sound generating device further comprises a ventilation spacer located in the rear sound cavity, and the ventilation spacer is fixed to the support and separates the sound generating unit from the rear sound cavity.

Preferably, the ventilation separator comprises a separator body arranged opposite to the back shell plate at intervals, a separator extension part bent and extended from the periphery of the separator body to the bracket, and a separator fixing part bent and extended from one end of the separator extension part far away from the separator body; the air-permeable isolating piece is fixed on the support, and the air-permeable isolating piece, the rear shell, the base and the support jointly enclose a powder filling space.

Preferably, the sounding unit further comprises a metal basin frame for fixing the vibrating diaphragm, one end, away from the base extension wall, of the base plate is fixed with the metal basin frame in a local welding mode, and the support is fixed to the metal basin frame in a winding mode.

Preferably, the support comprises a first surface and a second surface which are parallel to the vibrating direction of the vibrating diaphragm and are oppositely arranged, the first surface is fixedly connected with the metal basin frame, and the second surface is arranged at intervals with the base extension wall.

Preferably, the bracket further includes a third surface connecting the first surface and the second surface, a fourth surface connected to the second surface and spaced apart from the third surface, and a fifth surface extending obliquely from the first surface to the fourth surface; the breathable spacer is fixed to the third face, and the base plate is fixed to the fourth face.

Preferably, the sound generating device further comprises a conductive piece for connecting the sound generating unit with external electrical signals, wherein the conductive piece comprises a conductive piece body, a connecting arm and an extension arm, the conductive piece body is supported and fixed at one end of the support, which is close to the rear shell, the connecting arm extends from two ends of the conductive piece body to the direction of the sound generating unit and is fixedly and electrically connected with the sound generating unit, and the extension arm extends from the conductive piece body to the direction far away from the sound generating unit and penetrates through the shell; the support is close to one side of the backshell is sunken to form the accommodating groove, the conducting piece body set up in the accommodating groove and make the conducting piece body with the support is close to one side parallel and level of backshell, the setting of isolation spare fixed part is pressed simultaneously and is fixed in the conducting piece body with the support.

Preferably, the sounding device further comprises a rubber ring attached to one side, away from the sounding single body, of the base plate, and the rubber ring surrounds the sounding opening.

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

Compared with the related art, the sounding device comprises a shell with an accommodating space and sounding monomers accommodated in the accommodating space, wherein the shell is designed to be a base and a rear shell which are respectively covered on two opposite sides of the sounding monomers, a bracket is additionally arranged for fixing the sounding monomers, meanwhile, the bracket and the base are fixed, the rear shell, the base, the bracket and the sounding monomers jointly enclose a rear sound cavity, the bracket is made of plastic materials, and the shell is made of metal materials; under the condition of not increasing the external dimension, the space of the rear acoustic cavity is increased, so that the acoustic effect of the sounding device is better; in addition, the backshell with base welded fastening, the reliability is better.

[ Description of the drawings ]

For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

FIG. 1 is a schematic perspective view of a sound emitting device of the present invention;

FIG. 2 is a partially exploded perspective view of a sound emitting device of the present invention;

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

Fig. 4 is an enlarged view of a portion shown in fig. 3B.

[ Detailed description ] of the invention

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-4, the present invention provides a sound generating device 100, which includes a housing 1 having a receiving space 10, a sound generating unit 2 received in the receiving space 10, a bracket 3, a ventilation spacer 4, a conductive member 5, and a rubber ring 6.

The sounding unit 2 comprises a metal basin frame 22 and a vibrating diaphragm 21 fixed on 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 welded and fixed and cover respectively along the vibration direction of the diaphragm 21 and locate on two opposite sides of the sounding unit 2, in this embodiment, the base 11 and the rear casing 12 cover and locate on two opposite sides of the metal basin frame 22 along the vibration direction of the diaphragm 21, and the base 11 and the rear casing 12 are made of metal materials, so that the whole casing 1 is thinned, and the size of the accommodating space 10 is further increased.

The base 11 comprises a base plate 111 fixed on one side of the sounding unit 2 far from the rear shell 12, a base extension wall 112 bent and extended from the outer periphery of the base plate 111 towards the rear shell 12, and a flange 113 bent and extended from the inner periphery of the base plate 111 towards the direction far from the bracket 3, wherein the flange 113 and the unit 2 are arranged at intervals; the base plate 111 is kept away from the one end of base extension wall 112 with the partial welded fastening of week side of metal basin frame 22, the reliability is better, the base plate 111 is including running through sound production mouth 1110 on it, sound production mouth 1110 with vibrating diaphragm 21 intercommunication, sound production monomer 2 is equipped with one side orientation of vibrating diaphragm 21 sound production mouth 1110 is in order to play sound.

The rear shell 12 comprises a rear shell plate 121 which is positioned on one side of the sounding unit 2 away from the base 11 and is spaced from the sounding unit 2, and a rear shell extension wall 122 which is bent and extended from the periphery of the rear shell plate 121 towards the base 11. Specifically, the extending direction of the rear casing extending wall 122 is parallel to the vibrating direction of the vibrating diaphragm 21, the extending direction of the base extending wall 112 is parallel to the vibrating direction of the vibrating diaphragm 21, and the rear casing extending wall 122 abuts against the base extending wall 112 and is welded and fixed with the base extending wall 112, so that the reliability is better.

The bracket 3 is annular and fixed with the sounding monomer 2 by gluing, the bracket 3 is accommodated in the accommodating space and fixed on the periphery of the metal basin frame 22 in a surrounding manner, and the bracket 3 is abutted and fixed on one side of the base plate 111, which is close to the rear shell 12, and is arranged at intervals with the rear shell extension wall 112.

Specifically, the support 3 is made of plastic material, the support 3 includes a first surface 31 and a second surface 32 that are parallel to the vibration direction of the diaphragm 21 and are disposed opposite to each other, the first surface 31 is fixedly connected to the metal basin frame 22, and the second surface 32 is disposed at intervals 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 air-permeable separator 4 is fixed to the third surface 33, and the base plate 111 is fixed to the fourth surface 34. That is, by setting the support 3, the support 3 is inclined corresponding to the fifth surface 35 of the diaphragm 21, which is favorable for making the sound of the sounding unit 2 and has better sounding 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 define a rear acoustic cavity 20. The sound generating device 100 of the present invention forms a relatively closed rear acoustic cavity structure, which has a simple structure, and improves the acoustic performance, particularly the low-frequency acoustic performance, of the sound generating device 100.

Located within the rear acoustic chamber 20 is an air-permeable barrier 4 which is secured to the support 3 and separates the sound-emitting cells 2 from the rear acoustic chamber 20.

Specifically, the ventilation separator 4 includes a separator body 41 disposed opposite to the back shell plate 121 at a distance, a separator extension 42 extending from the periphery of the separator body 41 to the bracket 3, and a separator fixing portion 43 extending from one end of the separator extension 42 away from the separator body 41; the spacer extension 42 is spaced from the rear housing extension wall 122, the spacer fixing portion 43 is fixed on the bracket, and the air-permeable spacer 4, the rear housing 12, the base 11 and the bracket 3 together define a powder filling space 30.

The rubber ring 6 is attached to one side of the base plate 111 away from the sounding unit 2, and the rubber ring 6 is disposed around the sounding port 1110. The sound generating device 100 is assembled and sealed with the whole machine through a rubber ring 6, and specifically, the rubber ring 6 is double faced adhesive tape.

The shell 1 comprises a gap 13 penetrating through the shell, the sounding device 100 further comprises a conductive piece 5 for connecting the sounding single body 2 with external electric signals, the conductive piece 5 comprises a conductive piece body 51 supported and fixed on one end of the support 3 close to the rear shell 12, connecting arms 52 extending from two ends of the conductive piece body 51 to the sounding single body 2 and fixedly and electrically connected with the sounding single body 2, and extension arms 53 extending from the conductive piece body 51 to the direction far away from the sounding single body 2 and passing through the gap 13; the support 3 is recessed near one side of the rear shell 12 to form a receiving groove 3a, the conductive member body 51 is disposed in the receiving groove 3a and makes the conductive member body 51 flush with one side of the support 3 near the rear shell 12, and the spacer fixing portion 43 is simultaneously pressed and fixed on the conductive member body 51 and the support 3.

While the invention has been described with respect to the above embodiments, it should be noted that modifications can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the invention.

Claims

1. The sound production device comprises a shell with an accommodating space and a sound production monomer accommodated in the accommodating space, wherein the sound production monomer comprises a vibrating diaphragm for vibrating and producing sound, and the sound production device is characterized in that the shell is made of a metal material and comprises a base and a rear shell which are respectively covered on two opposite sides of the sound production monomer along the vibrating direction of the vibrating diaphragm, the base and the rear shell are welded and fixed, the base is provided with a sound production opening penetrating through the base, and one side of the sound production monomer provided with the vibrating diaphragm faces the sound production opening; the sound generating device further comprises a ring-shaped bracket which is accommodated in the accommodating space and is fixedly wound on the periphery of the sound generating unit, and the bracket is made of plastic materials and is fixedly abutted against one side, close to the rear shell, of the base; the rear shell, the base, the bracket and the sounding monomer jointly enclose a rear sound cavity;

The base comprises a base plate positioned on one side of the sounding monomer, far away from the rear shell, and a base extension wall bent and extended from the outer periphery of the base plate to the rear shell direction, wherein one end of the base plate, far away from the base extension wall, is locally welded and fixed with the periphery of the sounding monomer; the sound producing port penetrates through the base plate; the rear shell comprises a rear shell plate and a rear shell extending wall, the rear shell plate is positioned on one side, far away from the base, of the sounding monomer and is spaced from the sounding monomer, the rear shell extending wall is bent and extended from the periphery of the rear shell plate to the direction of the base, and the rear shell extending wall is abutted to the base extending wall and welded and fixed with the base extending wall;

The sound generating device further comprises a ventilation isolation piece positioned in the rear sound cavity, and the ventilation isolation piece is fixed on the bracket and separates the sound generating unit from the rear sound cavity;

The breathable separator comprises a separator body, a separator extension part and a separator fixing part, wherein the separator body is arranged opposite to the back shell plate at intervals, the separator extension part is bent and extended from the periphery of the separator body to the bracket, and the separator fixing part is bent and extended from one end of the separator extension part far away from the separator body; the air-permeable isolating piece, the rear shell, the base and the support jointly enclose a powder filling space;

The sounding unit further comprises a metal basin frame used for fixing the vibrating diaphragm, one end of the base plate, far away from the base extension wall, is fixed with the metal basin frame in a local welding mode, and the support is fixed on the metal basin frame in a winding mode;

the support comprises a first surface and a second surface which are parallel to the vibrating direction of the vibrating diaphragm and are oppositely arranged, the first surface is fixedly connected with the metal basin frame, and the second surface is arranged at intervals with the base extension wall;

The bracket further comprises a third surface connected with the first surface and the second surface, a fourth surface connected with the second surface and arranged at intervals with the third surface, and a fifth surface obliquely extending from the first surface to the fourth surface; the breathable spacer is fixed to the third face, and the base plate is fixed to the fourth face.

2. The sound emitting device of claim 1, wherein the base further comprises a flange formed by bending and extending an inner periphery of the base plate away from the bracket, and the flange is spaced from the single body.

3. The sound generating device according to claim 1, further comprising a conductive member for connecting the sound generating unit with external electrical signals, wherein the conductive member comprises a conductive member body supported and fixed at one end of the support near the rear shell, connecting arms extending from two ends of the conductive member body to the direction of the sound generating unit and fixedly and electrically connected with the sound generating unit, and extension arms extending from the conductive member body to the direction away from the sound generating unit and penetrating through the shell; the support is close to one side of the backshell is sunken to form the accommodating groove, the conducting piece body set up in the accommodating groove and make the conducting piece body with the support is close to one side parallel and level of backshell, the setting of isolation spare fixed part is pressed simultaneously and is fixed in the conducting piece body with the support.

4. The sound generating device of claim 1, further comprising a rubber ring attached to a side of the base plate away from the sound generating unit, the rubber ring surrounding the sound generating port.

5. The sound emitting device of claim 4, wherein the rubber ring is double sided tape.