Patent Publication Number: US-9838765-B1

Title: Speaker box

Description:
FIELD OF THE PRESENT DISCLOSURE 
     The present disclosure relates to the field of electro-acoustic transducers, and more particularly to a speaker box used in a portable electronic device. 
     DESCRIPTION OF RELATED ART 
     The speaker box of related technology is to achieve the better acoustic performance, so that sound-absorbing powder is often filled in the internal cavity of the speaker box. In the conventional method, the sound-absorbing powder is sealed in a separate case, and then, the case in which the sound-absorbing powder is sealed is fitted into the internal cavity of the speaker box. Designed in such a manner, it is difficult to get full use of the internal cavity space of the speaker box and it is limited to improve the acoustic performance. 
     Thereof, it is necessary to disclose and provide an improved speaker box to overcome the above-mentioned disadvantages. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWING 
       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. 
         FIG. 1  is an isometric and exploded view of a speaker box in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 2  is a front view of the speaker box in  FIG. 1 . 
         FIG. 3  is a cross-sectional view of the speaker box taken along line A-A in  FIG. 2 . 
         FIG. 4  is an enlarged view of Part B in  FIG. 3 . 
     
    
    
     DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENT 
     The present disclosure will hereinafter be described in detail with reference to an exemplary embodiment. 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 this disclosure, not intended to limit this disclosure. 
     As shown in  FIGS. 1-4 , a speaker box  100  in accordance with an exemplary embodiment of the present disclosure includes a housing  1  with an accommodation space  10 , a speaker unit  2  and sound-absorbing powder  3  received in the housing  1 . The housing  1  includes a retaining wall  13  for separating the accommodation space  10  into a front cavity  101  and a rear cavity  102  opposed to the front cavity  101 . The speaker unit  2  is accommodated in the front cavity  101 . The sound absorption powder  3  is provided in the rear cavity  102 . The retaining wall  13  is provided with a through hole  14  to communicate with the front cavity  101  and the rear cavity  102 , and in the retaining wall  13  a separation mesh  15  is insert-molded for covering the through hole  14 . The separation mesh  15  separates the sound absorption powder  3  from entering the front cavity  101 . The separation mesh  15  is one of a nonwoven fabric, a woven fabric, a dustproof mesh, a nylon braid, and a metal mesh. 
     The housing  1  includes an injection hole  4  in accordance with the position of the rear cavity  102 . The sound absorptive powder  3  is filled into the rear cavity  102  via the injection hole  4 . A sealing net  6  is disposed at the injection hole  4  for covering the injection hole  4  and sealing the sound-absorbing powder  3  in the rear cavity  102 . The housing  1  is provided with a groove  5  at the injection hole  4 , and the sealing net  6  is provided in the groove  5 . Optionally, the sealing net  6  is an air-permeable structure, and the injection hole  4  can serve as a leak hole of the rear cavity  102 . 
     In the present embodiment, the housing  1  includes a first housing  11  and a second housing  12  engaging with the first housing  11 . The first housing  11  and the second housing  12  are ultrasonically welded for forming an integrated one. The retaining wall  13  includes a first retaining wall  111  provided in the first housing  11 , and a second retaining wall  121  provided in the second housing  12 . The first retaining wall  111  and the second retaining wall  121  are ultrasonically welded to form the retaining wall  13 . The through-hole  14  is provided in the first retaining wall  111 , and the separation mesh  15  is molded in the first retaining wall  111 , the first housing  11 , the first retaining wall  111 , and the separation mesh  15  are integrated injection. The through hole  14  may be provided in the second retaining wall  121 , too. In this case, the separation mesh  15  is molded on the second retaining wall  121 . Similarly, the second housing  12 , the second retaining wall  121  and the separation mesh  15  may be integrally injection-molded. Further, the injection hole  4  may be provided in the first housing  11  in addition to the case of the second housing  12  as in the present embodiment. 
     The present disclosure provides the speaker box with the retaining wall in the housing, the retaining wall divides the housing into the front cavity and the rear cavity opposite to the front cavity. The speaker unit is disposed in the front cavity, the sound-absorbing powder is disposed in the rear cavity. The retaining wall is provided with the through hole to connect the front cavity and the rear cavity, and the retaining wall is injection-molded with the separation mesh. The separation mesh covers the through hole, and separates the sound-absorbing powder from the front cavity, which can fully utilize the housing space to fill the sound absorption powder, and the speaker box has good acoustic performance. 
     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.