CN108337612B

CN108337612B - Sound production device

Info

Publication number: CN108337612B
Application number: CN201810007736.XA
Authority: CN
Inventors: 王桐; 刘晓东
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2018-01-04
Filing date: 2018-01-04
Publication date: 2020-09-18
Anticipated expiration: 2038-01-04
Also published as: CN108337612A

Abstract

The invention provides a sounding device, which comprises a shell with an accommodating space and a sounding monomer accommodated in the shell, wherein the sounding monomer divides the accommodating space into a front cavity and a rear cavity, and a composite layer which is clamped between the sounding monomer and the shell and inhibits the sounding monomer from causing shell resonance when in work is arranged in the rear cavity; the composite layer includes a cushioning material layer and a sound absorbing material layer. The composite layer comprises a buffer material layer and a sound absorption material layer, and the composite layer can fully utilize the space of the rear cavity to be filled with the sound absorption material to improve the low-frequency performance while inhibiting the resonance of the shell caused by the sound production monomer in working.

Description

Sound production device

[ technical field ] A method for producing a semiconductor device

The invention relates to the field of electroacoustic transduction, in particular to a sounding device.

[ background of the invention ]

With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among the mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. At present, the functions of mobile phones are very diverse, one of them is a high-quality music function, and therefore, a sound generating device for playing sound is widely applied to the current smart mobile devices.

However, it is difficult to achieve the required acoustic performance due to the problem of being limited to the back cavity space of the speaker module. In the sound production device of the related art, the sound absorption material is filled in the rear cavity in the prior art, so that the acoustic performance is improved, but an assembly gap is always formed between the sound production monomer and the cover plate, other materials are filled, part of space is lost, the performance cannot reach the maximum, and the problem of shell vibration (shell resonance caused by the sound production monomer during working) of a product can also occur. In order to solve the problem of the product shell shaking and to make efficient use of the back space, the gap is usually filled with a buffer substance (e.g. glue or buffer foam, etc.), which fills part of the back volume, i.e. the glue sites in the back space are partially not available, thereby resulting in a loss of acoustic performance. In order to effectively utilize the space of the rear cavity, avoid the vibration of the casing of the sound generating device and improve the low-frequency performance of the sound generating device, it is necessary to provide a new sound generating device.

[ summary of the invention ]

In order to solve the above problems, the present invention provides a sound generating device, which includes a housing having an accommodating space and a sound generating unit accommodated in the housing, wherein the sound generating unit divides the accommodating space into a front cavity and a rear cavity, and a composite layer is arranged in the rear cavity and is clamped between the sound generating unit and the housing for inhibiting the resonance of the housing when the sound generating unit works; the composite layer includes a cushioning material layer and a sound absorbing material layer.

As an improvement, the cushioning material layer and the sound-absorbing material layer are located in the same layer structure.

As an improvement, the sound absorbing material layer is disposed around the cushioning material layer.

As an improvement, the sound absorbing material layer has an area larger than that of the cushion material layer.

As an improvement, the inner contour of the sound-absorbing material layer matches the outer contour of the cushion material layer, and the outer contour of the sound-absorbing material layer matches the contour of the sound-emitting unit.

As an improvement, the sound absorbing material layer is sound absorbing cotton.

As an improvement, the buffer material layer is silica gel or foam.

As a modification, the rear chamber includes a first chamber and a second chamber located on both sides of the sound-emitting unit.

As a modification, the first chamber and the second chamber are also filled with sound absorbing materials.

The invention has the beneficial effects that: the composite layer comprises a buffer material layer and a sound absorption material layer, and the composite layer can fully utilize the space of the rear cavity to be filled with the sound absorption material to improve the low-frequency performance while inhibiting the resonance of the shell caused by the sound production monomer in working.

[ description of the drawings ]

FIG. 1 is an exploded perspective view of a sound device according to the present invention;

FIG. 2 is a front view of the sound device of the present invention;

3 fig. 3 3 3 is 3 a 3 sectional 3 view 3 taken 3 along 3 line 3 a 3- 3 a 3 in 3 fig. 3 2 3. 3

[ detailed description ] embodiments

The invention will be described in further detail below with reference to the accompanying fig. 1 to 3 in order to better understand the solution of the invention and its advantages in various aspects. In the following examples, the following detailed description is provided for the purpose of providing a clear and thorough understanding of the present invention, and is not intended to limit the invention.

Referring to fig. 1 to 3, the present invention provides a sound-generating device, which includes a housing 10 and a sound-generating unit 3 accommodated in the housing 10, wherein the housing 10 includes an upper cover 1 and a lower cover 2 opposite to the upper cover 1, and the upper cover 1 and the lower cover 2 are assembled together to form an accommodating space 4.

The sound generating unit 3 divides the accommodating space 4 into a front cavity 41 and a rear cavity 42, and specifically, the sound generating unit 3 and the upper cover 1 enclose the front cavity 41 for generating sound; the sounding unit 3, the lower cover 2 and the upper cover 1 together enclose a rear cavity 42 for improving low-frequency acoustic performance.

The rear cavity 42 is provided with a composite layer 5 sandwiched between the sound-generating unit 3 and the casing 10 (specifically, the lower cover 2 in the present embodiment), the composite layer 5 includes a sound-absorbing material layer 51 and a buffer material layer 52, and the composite layer 5 can suppress resonance of the casing 10 caused by the sound-generating unit 3 during operation, and can also fill the sound-absorbing material in the space of the rear cavity 42 to improve the low-frequency performance.

Specifically, in the present embodiment, the sound absorbing material layer 51 and the cushion material layer 52 are located in the same layer structure, wherein the sound absorbing material layer 51 is disposed around the cushion material layer 52, the inner contour of the sound absorbing material layer 51 matches the outer contour of the cushion material layer 52, the outer contour of the sound absorbing material layer 51 matches the contour of the sound-emitting unit 3, the sound absorbing material layer 51 is formed by cutting out the central area, the shape of the sound absorbing material layer 51 is preferably a rectangular ring, and the shape of the cushion material layer 52 matches the gap to be filled in the central area, for example, is a rectangle, but may be a circle or other shapes. Of course, the sound absorbing material layer 51 and the cushion material layer 52 may be provided in a stacked manner or in a left-right divided manner in the same layer structure, and the composite layer 5 includes one sound absorbing material layer 51, but is not limited thereto, the sound absorbing material layer 51 may be two, three, four or more, and the sound absorbing material layer 51 may be provided in a peripheral region of the composite layer 5, for example, in a symmetrical manner.

The material of the sound absorbing material layer 51 is preferably sound absorbing cotton, but is not limited thereto, and may be other sound absorbing material capable of improving low frequency performance; the material of the buffer material layer 52 is preferably silica gel or foam, but is not limited thereto, and other materials capable of playing a role of buffering can be used, so that the shell vibration can be effectively avoided. Preferably, the sound-absorbing material layer 51 has an area larger than that of the cushion material layer 52.

The rear chamber 42 further includes first and

second chambers

421 and 422 on both sides of the sound-emitting unit 3, and the first and

second chambers

421 and 422 are filled with sound-absorbing materials to further improve low-frequency acoustic performance.

Compared with the prior art, the sound production device is provided with the composite layer arranged between the sound production monomer and the shell in the rear cavity, the composite layer comprises the buffer material layer and the sound absorption material layer, and the composite layer can fully utilize the space of the rear cavity to be filled with the sound absorption material to improve the low-frequency performance while inhibiting the resonance of the shell caused by the sound production monomer during working.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims

1. A sounding device comprises a shell with an accommodating space and a sounding monomer accommodated in the shell, wherein the sounding monomer divides the accommodating space into a front cavity and a rear cavity; the composite bed includes buffer material layer and sound absorbing material layer, the buffer material layer with sound absorbing material layer is located same layer structure, sound absorbing material layer encircles the buffer material layer sets up.

2. The sounder device according to claim 1, wherein an area of the sound absorbing material layer is greater than an area of the damping material layer.

3. The sound production device of claim 1, wherein the sound absorbing material layer has an inner contour matching an outer contour of the cushioning material layer, and wherein the sound absorbing material layer has an outer contour matching a contour of the sound producing unit.

4. A sounder device according to any of claims 1 to 3, wherein the sound absorbing material layer is sound absorbing cotton.

5. The sounding device according to any one of claims 1 to 3, wherein the layer of cushioning material is silicone or foam.

6. The sound device of claim 1, wherein the rear cavity includes a first chamber and a second chamber on either side of the sound emitting unit.

7. The sounder device according to claim 6, wherein the first and second chambers are further filled with sound absorbing material.