Patent Application
20180376241
The present disclosure relates to electro-acoustic transducers, more particularly to sound generator like a speaker box for converting electrical signals to audible sounds.
With the rapid development of portable electronic products such as mobile phone, the users have increasingly higher requirements for the functions of products, hence the development of sound generator is also accelerated correspondingly. A sound generator of related art comprises a housing with a cavity and a speaker unit installed on the housing. As the cavity is in a sealed structure with relatively small volume, the resonance frequency of sound generator is high, resulting in inferior low-frequency performance of sound generator, thus hard to send out solid and rich low sound. However, the miniaturization development of sound generator imposes limit to the specifications of sound generator, it's hard to achieve the improvement of low-frequency performance of sound generator simply by expanding cavity. To improve the issue of low-frequency performance, in the sound generator of prior art, sound absorbing material is filled into the cavity and encapsulated by a shell. However, the shell encapsulating the sound absorbing material is generally molded by plastic compression or bracket injection.
Therefore it is necessary to provide an improved sound generator for overcoming the above-mentioned disadvantages.
Many aspects of the exemplary embodiment can be better understood with reference to the following drawing. The components in the drawing are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure.
The present disclosure will hereinafter be described in detail with reference to an exemplary embodiments. To make the technical problems to be solved, technical solutions and beneficial effects of the present disclosure more apparent, the present disclosure is described in further detail together with the figure and the embodiment. It should be understood the specific embodiment described hereby is only to explain the disclosure, not intended to limit the disclosure.
All the shells filled with sound absorbing material of prior art are molded by plastic compression or bracket injection, the shell cannot breathe, so that the sound absorbing material in the shell has small or even absolutely no area of contact with the outside, thus the performance of sound absorbing material cannot be brought into full play.
In the present disclosure, to bring the sound absorbing material into full play and further improve the low-frequency performance of products, by using metal mesh or high-strength mesh fabric as raw material and producing the shell through mold compression, a mesh housing for filling in the sound absorbing powder is made, which can breathe all around to remarkably increase the area of communication between the sound absorbing powder and the outside and improve the rate of effective contact between the sound absorbing powder and the air, thus further improving the low-frequency performance of the products.
Specifically, referring to
Specifically, as shown in
Through mesh holes on the mesh housing 100, the sound absorbing powder inside the mesh housing 100 can have full contact with the outside, thus increasing communication area and improving the low-frequency performance of the sound generator 200.
The acoustic transmission mesh of the present disclosure can be metal mesh or anti-dust mesh. It is easy for compression molding and has stable shape after molding with sufficient strength.
The mesh housing 100 and the speaker unit 220 of the present disclosure are installed in parallel at the inner wall 212 of the housing, ensuring the sound-absorbing performance, and part of sound energy can be transmitted into the mesh housing 100 encapsulated with sound absorbing powder through the inner wall 212 of the housing.
Specifically, as shown in
In the present disclosure, to improve the strength of the mesh housing 100, the mesh housing 100 further comprises a base shell 140 connected with one end of the side wall 120 to form the base shell 140 integrally while forming the side wall 120 through compression, so as to ensure the structural stability of the molded mesh housing 100 and also facilitate the installation of the mesh housing 100 inside the sound generator. As shown in
To facilitate both the installation of the mesh housing 100 in the sound generator 200 and capture of the mesh housing 100 during handling, as shown in
Optionally, the fold-over edge 150 and the housing inner wall 212 are adhesively fixed, easy for production and adjustment; in some embodiments, the fold-over edge 150 and the housing inner wall 212 are hot-melt fixed together with the housing inner wall 212, thus facilitating installation and improving production efficiency.
The present disclosure provides a sound generator 200 which comprises a mesh housing 100 filled with sound absorbing powder, a speaker unit 220 and a case 210, the mesh housing 100 and the speaker unit 220 are provided inside the case 210. The sound absorbing powder inside the mesh housing 100 has full contact with the outside, thus increasing communication area and improving low-frequency performance. The mesh housing 100 is connected with the housing inner wall 212 in a way of gluing or heat melting.
It is to be understood, however, that even though numerous characteristics and advantages of the present exemplary embodiment have been set forth in the foregoing description, together with details of the structures and functions of the embodiment, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms where the appended claims are expressed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201720744057.1 | Jun 2017 | CN | national |
