Patent Publication Number: US-2013243237-A1

Title: Electronic device with anti-resonance structure

Description:
BACKGROUND 
     1. Technical Field 
     The present disclosure relates to an electronic device with an anti-resonance structure. 
     2. Description of Related Art 
     Many electronic devices, digital video disc (DVD) players, for example, include one or more speakers. The electronic devices usually include a housing, a middle frame defining a cavity, and a speaker fixed to the middle frame and positioned corresponding to the cavity. An anterior sound chamber is formed between the speaker and the housing, and a rear sound chamber is formed between the speaker and the middle frame. A foam is usually affixed between the housing and the middle frame to absorb the resonance of the speaker, thus to improve the sound effect. The affixing of the foam is usually conducted manually, which is not efficient. 
     Therefore, what is needed is an electronic device with an anti-resonance structure to overcome the limitations described above. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of this disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
         FIG. 1  is an isometric view of an exemplary embodiment of an electronic device. 
         FIG. 2  is an exploded view of the electronic device of  FIG. 1 . 
         FIG. 3  is similar to  FIG. 2 , but viewed from another perspective. 
         FIG. 4  is a partial, enlarged view of the electronic device of  FIG. 1 , showing an anti-resonance structure of the electronic device. 
         FIG. 5  is a cross-sectional view of the electronic device of  FIG. 1 , taking along line V-V. 
     
    
    
     DETAILED DESCRIPTION 
       FIGS. 1 and 2  show an exemplary electronic device  100  of the disclosure. The electronic device  100  includes an front cover  10 , at least one speaker  20 , a rear cover  20  coupled to the front cover  10 , and a liquid crystal display (LCD) panel  40  fixed between the front cover  10  and the rear cover  20 . The front cover  10  defines a number of sound emitting holes  101 , a through opening  102 , and at least one receiving chamber  103  in an inner side. The speaker  20  is received in the receiving chamber  103 . The LCD panel  40  is visible through the through opening  102 , and the sound from the speaker  20  is emitted through the sound emitting holes  101 . In the embodiment, the electronic device  100  is a DVD player. The number of the speaker  20  is equal to the number of the receiving chamber  103  and both are two. In other embodiments, the electronic device  100  also can be a mobile phone, a tablet computer, a music player, or other electronic devices with speakers. 
       FIGS. 2-4  show that two anti-resonance structures  31  protrude from the inner surface of the rear cover  30 . The anti-resonance structures  31  prevent the LCD panel  40  from being damaged by the resonance of the speakers  20 . 
       FIGS. 4 and 5  show that each anti-resonance structure  31  includes a number of legs  311  and a support  312 . One end of each leg  311  protrudes from the inner surface of the rear cover  30 , and the other, opposite end of the leg  311  is connected to one distal end of the support  312 . The support  312  is approximately long strip-shaped. A rib  313  protrudes from the middle portion of the support  312 , and resists against the LCD panel  40  to absorb the vibration transmitted from the speakers  20 . In the embodiment, the rear cover  30  and the anti-resonance structures  31  are made of plastic materials having sound deformation characteristics. 
     In the embodiment, the anti-resonance structure  31  includes two pairs of legs  311 , and one pair of legs  311  is connected to one distal end of the support  312 , and the other pair of legs  311  is connected to other distal end of the support  312 . The rear cover  30  and the anti-resonance structure  31  are integrally formed. The rib  313  is a ridge extending along the widthwise direction of the support  312 . In an alternative embodiment, the number of the legs  311  can be varied according to need. The rear cover  30  and the anti-resonance structures  31  can be made of elastic materials, such as rubber. 
     Since the anti-resonance structure  31  on the rear cover  30  has sound deformation characteristics, and has a rib  313  resisting against the LCD panel  40  to absorb the vibration of the LCD panel  40  transmitted from the speakers  20 . Thus effectively preventing the LCD panel  40  from being damaged by the resonance of the speakers  20 , and improving the sound effect output by the electronic device  100 . Compared to affixing the foam in the conventional electronic devices, the assembly is simplified for the rear cover  30  and the anti-resonance structures  31  are integrally formed. 
     Although the present disclosure has been specifically described on the basis of the embodiments thereof, the disclosure is not to be construed as being limited thereto. Various changes or modifications may be made to the embodiments without departing from the scope and spirit of the disclosure.