Patent Publication Number: US-10764664-B2

Title: Speaker box

Description:
FIELD OF THE DISCLOSURE 
     The present disclosure relates to acoustic-electro transducers, and more particularly to a speaker box used in a portable electronic device. 
     DESCRIPTION OF RELATED ART 
     With the arrival of the mobile internet era, the number of smart mobile devices is being increasing. However, in all these mobile devices, mobile phones are the most common and portable mobile terminal deices. At present, mobile phones are powerful functionality, and one of the powerful functions is the high-quality music function. Therefore, speaker boxes for playing music are widely applied to conventional smart mobile devices. 
     A speaker box of the related art comprises a shell having a receiving space, a speaker accommodated in the shell and a sound guiding channel defined in the receiving space. The speaker comprises a diaphragm for producing sound by vibrating, the diaphragm partitions the receiving space into a front sound cavity and a rear cavity. The sound guiding channel communicates the front sound cavity with the outside, and cooperatively defines a front cavity with the front sound cavity. 
     However, in the speaker box of the related art, the space of the front cavity is limited to a region rightly opposite to a dome and a region of the sound guiding channel, and the structure is monotonous and may not be optimized. Therefore, high-frequency acoustic performance of the speaker box is subject to restrictions, and over-high high-frequency responses may cause harsh sounds, sharp dentilabial sounds and the like poor sound effects. 
     Therefore, it is desired to provide a speaker box to overcome the aforesaid problems. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of the exemplary embodiments can be better understood with reference to the following drawings. 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. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
         FIG. 1  is a schematic diagram of a three-dimensional structure of the speaker box in accordance with an exemplary embodiment of the present disclosure; 
         FIG. 2  is a schematic diagram of the structure of the speaker box showing another perspective view in  FIG. 1 ; 
         FIG. 3  is a schematic diagram of the three-dimensional structure of the speaker box exploded view showing in  FIG. 1 ; and 
         FIG. 4  is a cross-sectional view along the A-A line showing in  FIG. 1 . 
     
    
    
     DETAILED DESCRIPTION 
     The present disclosure will hereinafter be described in detail with reference to several 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 embodiments. It should be understood the specific embodiments described hereby is only to explain the disclosure, not intended to limit the disclosure. 
     Please also refer to  FIG. 1  to  FIG. 4 , wherein  FIG. 1  is a three-dimensional structure diagram of the speaker box of the present disclosure,  FIG. 2  is another perspective view schematic of the speaker box showing in  FIG. 1 ,  FIG. 3  is a schematic exploded view of the three-dimensional structure of a speaker box showing in  FIG. 1 ,  FIG. 4  is a cross-sectional view taken along line A-A of  FIG. 1 . 
     The present disclosure provides a speaker box  100 , which comprises a shell  1 , a speaker  2 , a sound guiding channel  3 , an auxiliary acoustic cavity  4 , a damping mesh  5 , a cover plate  6  and a groove  7 . 
     The shell  1  may be formed integrally or be formed separately. For example, in this embodiment, the housing  1  includes a lower cover  11 , and an upper cover  12  covering with the lower cover  11  and cooperatively defining the receiving space  10  with the lower cover  11 . 
     The speaker  2  is accommodated in the receiving space  10  of the Shell  1 , and the speaker  2  partitions the receiving space  10  into a front sound cavity  8  and a rear cavity  101 . 
     The shell  1  comprises a support wall  121  and a surrounding wall  122 . The support wall  121  and the surrounding wall  122  are formed in the upper cover  12 . The speaker  2  is supported by the support wall  121  and cooperates with the upper cover  12  to form the front sound cavity  8 . 
     In this embodiment, the speaker  2  comprises a diaphragm  21  for vibration and produce sound via irradiation, and the diaphragm  21  partitions the receiving space  10  into the front sound cavity  8  and the rear cavity  101 . In particular, the diaphragm  21  is set at intervals with the upper cover  12 , and cooperates with the upper cover  12  to form the front sound cavity  8 . The diaphragm  21 , the lower cover  11  and the upper cover  12  cooperatively define the rear cavity  101 . The rear cavity  101  is used to improve the low frequency acoustic performance of the speaker box  100 . 
     The support wall  121  is for supporting and fixing the speaker  2 . The support wall  121  is formed by the inner extension of the shell  1 . The surrounding wall  122  is located on the outside of the support wall  121 , and the surrounding wall  122  is formed by the inner extension of the shell  1 . 
     In particular, the Shell  1 , the surrounding wall  122 , the support wall  121  and the cover plate  6  are jointly enclosed as the auxiliary acoustic cavity  4 . 
     In this embodiment, a through-hole  41  is disposed through the support wall  121 , the auxiliary acoustic cavity  4  is communicated with the front cavity  102  through the through-hole  41  to form the resonator structure of the front cavity  102 , and the sound guiding channel  3  is formed in the receiving space  10  of the shell  1 . 
     The sound guiding channel  3  is formed in the upper cover  12 . The sound guiding channel  3  communicates the front sound cavity  8  with the outside, and the sound guiding channel  3  is cooperates together with the front sound cavity  8  to form the front cavity  102 . The sound guiding channel  3  is used to form a side sound radiating structure of the front cavity  102 . 
     The auxiliary acoustic cavity  4  communicates with the front cavity  102  through the through-hole  41 . The speaker box  100  further includes a leakage structure, the leakage structure includes a leakage hole  42  through the shell  1  and a damping mesh  5  arranged in the leakage hole  42 , the damping mesh  5  is located on the outside of the auxiliary acoustic cavity  4 . The damping adjustment is realized by adjusting the number of holes of the damping mesh  5  for balancing and improving the sound pressure of the auxiliary acoustic cavity  4  and the outside. 
     In the present embodiment, the speaker  2  isolates the front cavity  102  from the auxiliary acoustic cavity  4  into two cavities, and allows the auxiliary acoustic cavity  4  to be communicated with the front cavity  102  through the through-hole  41 , that is, the auxiliary acoustic cavity  4  severs as a part of the front cavity  102 , and the auxiliary acoustic cavity  4  is used as a resonant cavity of the front cavity  102 . On the one hand, the aforementioned structure effectively increases the volume of the cavity of the front cavity  102  and improves the high-frequency acoustic performance, on the other hand, the aforementioned structure design of the auxiliary acoustic cavity  4  is more flexible and diverse, and the restriction is small and the applicability is higher. 
     Specifically, the auxiliary acoustic cavity  4  is communicated with the front sound cavity  8  through the through-hole  41 . Of course, the auxiliary acoustic cavity  4  can also be communicated with the sound guiding channel  3  through the through-hole  41 , which is also possible, and the principle is the same. 
     The speaker  2  is fixed to the support wall  121  by glue bonding, the method makes the whole structure of the acoustic monomer  2  combined with the support wall  121  stronger. 
     The cover plate  6  covers the surrounding wall  122 , the shell  1  cooperates with the surrounding wall  122 , the support wall  121  and cover plate  6  to form the auxiliary acoustic cavity  4 , so that the auxiliary acoustic cavity  4  forms a sealed cavity structure for charging the cavity of the front cavity  102  to realize high-frequency acoustic performance adjustment of the front cavity  102 . The cover plate  6  is made of a PET, the PET material has higher impact strength and folding resistance than the related materials, and the sanitary safety is better. The structure of the auxiliary acoustic cavity  4  can effectively reduce the Q value of the high frequency resonance peak of the speaker box (quality factor value) and sensitivity make the acoustic performance of the speaker box  100  better. 
     In the present embodiment, the upper cover  12  is provided with a groove  7  which is recessed in the direction of the lower cover  11  and communicates with the leakage hole  42 . The damping mesh  5  is received in the groove  7 . It makes the damper mesh  5  less to be scratched and peeled off. 
     Compared with the relevant art, the speaker box  100  of the present invention forms an auxiliary acoustic cavity  4  connecting with the front cavity  102  in the shell  11 , so that the auxiliary acoustic cavity  4  performs as a part of the front cavity  102  and acts as a resonant cavity, on the one hand, the aforementioned structure effectively increases the volume of the cavity of the front cavity, and improves High-frequency acoustic performance, on the other hand, the auxiliary acoustic cavity structure design is more flexible and diverse, and the applicability is higher. The above structure can effectively reduce the Q value (quality factor value) and sensitivity of the high-frequency resonance peak of the speaker box, so that the acoustic performance of the speaker box better. 
     It is to be understood, however, that even though numerous characteristics and advantages of the present embodiments have been set forth in the foregoing description, together with details of the structures and functions of the embodiments, 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 in which the appended claims are expressed.