Abstract:
A screen protecting assembly includes a pivot shaft, a curtain, two connecting bases and two rotating buttons. The curtain wraps around the pivot shaft. The connecting bases are connected to two opposite ends of the pivot shaft. Each rotating button has a first connecting portion and a second connecting portion. The first connecting portion engages the pivot shaft, and the second connecting portion is rotatably connected to the connecting base. When the rotating buttons are rotated in a first direction, the curtain unfolds to cover a screen of the electronic device. When the rotating buttons are rotated in a second direction counter the first direction, the curtain wraps around the pivot shaft again, so that the screen of the electronic device is exposed.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The present disclosure generally relates to screen protection and, particularly, to a screen protecting assembly for an electronic device with a liquid crystal display screen. 
         [0003]    2. Description of Related Art 
         [0004]    Liquid crystal display (LCD) screens are widely used in various electronic devices, such as computer monitors and televisions. Since the electronic devices are generally exposed to the environment, dust deposits on the LCD screens. In addition, the LCD screens are easily scratched. Therefore, a screen protecting assembly is often employed. Currently, many electronic devices are packaged with a plastic film to protect the LCD screens even when the device is not in use. 
         [0005]    However, the plastic films are inconvenient because they must be removed and re-applied repeatedly. 
         [0006]    Therefore, a screen protecting assembly for an electronic device which overcomes the described limitations is desirable. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]    The components in the drawings 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. 
           [0008]      FIG. 1  is an isometric view of a first embodiment of an electronic device and one embodiment of a screen protecting assembly, the screen protecting assembly not covering a display body of the electronic device. 
           [0009]      FIG. 2  is an exploded, isometric view of the screen protecting assembly of  FIG. 1 . 
           [0010]      FIG. 3  is a partial cross-section of the screen protecting assembly of  FIG. 1 , along the line III-III. 
           [0011]      FIG. 4  is an isometric view of the liquid crystal television of  FIG. 1 , with the display body covered by the screen protecting assembly. 
           [0012]      FIG. 5  is a partial, isometric view of a second embodiment of an electronic device, the electronic device incorporating another embodiment of the screen protecting assembly. 
           [0013]      FIG. 6  is a partial cross-section of the screen protecting assembly of  FIG. 5 . 
       
    
    
     DETAILED DESCRIPTION 
       [0014]    Referring to  FIG. 1 , a first embodiment of an electronic device  100  includes a display body  10  and a screen protecting assembly  30  assembled to an end of the display body  10 . 
         [0015]    Referring to  FIG. 2 , the display body  10  includes a front frame  11 , a side frame  13 , and a screen  15 . The front frame  11  and the side frame  13  cooperatively define a space (not labeled) for receiving the screen  15 . The front frame  11  defines a fixing groove (not labeled) in an end. A first latching device  111  is engaged in the fixing groove of the front frame  11 . In the illustrated embodiment, the first latching device  111  is a first magnet. The side frame  13  defines a first connecting groove  131  and two second connecting grooves  133 . The side frame  30  and the first magnet  111  are at opposite ends of the screen  15 . The second connecting grooves  133  are at opposite ends of the first connecting groove  131 . 
         [0016]    The screen protecting assembly  30  includes two connecting bases  31 , two rotating buttons  33 , a pivot shaft  35 , a curtain  37 , and a sleeve  39 . 
         [0017]    Each connecting base  31  defines a pivot hole  311 . An annular positioning protrusion  3111  is formed in the inner surface of the connecting base  31 . The connecting base  31  has a flat surface  313 . An engaging portion  314  is formed on the flat surface  313 . 
         [0018]    Each rotating button  33  includes a main body  331  having a first surface  3311  and a second surface  3313  opposite to the first surface  3311 , a first connecting portion  333  formed on a center portion of the first surface  3311 , four second connecting portions  334  formed on the first surface  3311  evenly distributed around the first connecting portion  333 . In the illustrated embodiment, the first connecting portion  333  is a rectangular protrusion, and the second connecting portions  334  are hooks. An operating portion  335  is formed on a center portion of the second surface  3313 . In the illustrated embodiment, the operating portion  335  is an elongated protrusion. 
         [0019]    The pivot shaft  35  includes two positioning portions  351  on opposite ends. In the illustrated embodiment, the pivot shaft  35  is substantially cylindrical, and each positioning portion  351  define a substantially rectangular cutout. 
         [0020]    The curtain  37  has a second latching device  371  on a distal end. In the illustrated embodiment, the second latching device  371  is a second magnet having a polarity opposite to that of the first magnet. In the illustrated embodiment, the curtain  37  may bear a photo or image. 
         [0021]    The sleeve  39  defines a receiving hole  391  in a center portion, and has a positioning surface  393  on the sidewall. The sleeve  39  further defines an assembling groove  395  communicating with the receiving hole  391  at an edge of the positioning surface  393 . An assembling protrusion  3931  is formed on the positioning surface  393 . 
         [0022]    Referring to  FIGS. 2 and 3 , during assembly of the screen protecting assembly  30 , the curtain  37  partially wraps around the pivot shaft  35 . The pivot shaft  35  is received in the receiving hole  391  of the sleeve  39 , with a part of the curtain  37  extending through the assembling groove  395 , the second latching device  371  of the curtain  37  positioned outside of the sleeve  39 , and the positioning portions  351  of the pivot shaft  35  extending out of the sleeve  39 . Each connecting base  31  sleeves on each positioning portions  351 . Each rotating button  33  is received in the pivot hole  311  of each corresponding connecting base  31 . The connecting protrusions  333  engage with the positioning portions  351  of the pivot shaft  35 , and the second connecting portions  334  engage the positioning protrusions  312  of the connecting bases  31 . 
         [0023]    After the screen protecting assembly  30  is assembled, the engaging portions  314  of the connecting bases  31  engage with the second connecting grooves  133  of the display body  10 . The assembling protrusion  3931  of the sleeve  39  is engaged in the first connecting groove  131  of the display body  10 . Therefore, the screen protecting assembly  30  is positioned on an end of the display body  10 . 
         [0024]    Referring to  FIGS. 1 through 4 , when the electronic device  100  is not in use, the rotating button  33  can be rotated by an external force applied on the operating portion  335 , so that the curtain  37  can be unwound from the shaft  35  to cover the screen  15  of the display body  10 , until the second latching device  371  couples with the first latching device  111 . Thus, the screen  15  is kept clean and protected from damage. In addition, the electronic device  100  with the curtain  10  can have a pleasing appearance because the curtain  10  can bear a photo or image. When the electronic device  100  is to be used, the rotating button  33  is rotated by the external force applied on the operating portion  335 , thereby winding the curtain  10  around the pivot shaft  35 , and exposing the screen  15  of the liquid crystal television  100 . 
         [0025]    It should be pointed out that the screen protecting assembly  30  may only include one connecting base  31  with the rotating button  33 . In this case, the other connecting base  31  is replaced by a base defining a blind hole in which one positioning portion  351  is engaged. Alternatively, the sleeve  39  may define a blind hole instead of the receiving hole  391 , and one positioning portion  351  is engaged in the blind hole of the sleeve  39 . In addition, the first latching device  111  and the second latching device  371  can be other fixing structures, such as a first hook and a second hook engaging with the first hook. The sleeve  39  can be integrally formed with the display body  10 , and a sound device may be positioned in the sleeve  39 . Thus, the electronic device  100  can emit sound, and have a small size. 
         [0026]    Referring to  FIG. 5 , a second embodiment of a television electronic device  200  includes a display body  50  and a screen protecting assembly  70  assembled to an end of the display body  50 . The display body  50  includes a screen  55 . 
         [0027]    The screen protecting assembly  70  includes a connecting base  71 , a pivot shaft  72 , a curtain  73 , two torsion springs  74 , and two covers  75 . 
         [0028]    The connecting base  71  is formed at an end of the display body  50 . The connecting base  71  defines a pivot hole  711 , and an assembling groove  712  communicating with the pivot hole  711 . The connecting base  71  further defines two restricting grooves  713  at opposite ends of the inner surface defining the pivot hole  711 . 
         [0029]    The pivot shaft  72  defines two positioning portions  721  on opposite ends. In the illustrated embodiment, the pivot shaft  72  is substantially cylindrical, and the positioning portions  721  are substantially rectangular cutouts. The curtain  73  wraps around the pivot shaft  72 , and has a free end  731 . 
         [0030]    Each torsion spring  74  includes an inner positioning portion  741  and an outer positioning portion  742 . Each cover  75  defines a connecting hole  751  in a first side surface. An operating portion  753  is formed on a second side surface opposite to the first side surface. 
         [0031]    During assembly of the screen protecting assembly  70 , the pivot shaft  35  is received in the pivot hole  711  of the connecting base  71 , when a part of the curtain  73  extends through the assembling groove  712 . The free end  731  of the curtain  73  is positioned outside of the connecting base  71 . One torsion spring  74  sleeves on the pivot shaft  72  and is received in the pivot hole  711 . The inner positioning portion  741  of the torsion spring  74  is engaged in one corresponding positioning portion  721 , and the outer positioning portion  742  of the torsion spring  74  is engaged in one corresponding restricting groove  713 . One cover  75  is engaged in the pivot hole  711 , and an end of the pivot shaft  72  is engaged in the connecting hole  751  of the cover  75 . The other torsion spring  74  and the other cover  75  are assembled to the connecting base  71  as described. 
         [0032]    When the liquid crystal television  200  is not in use, the free end  731  of the curtain  73  is pulled to cover the screen  55  of the display body  50 , and the free end  731  is fixed to an end of the display body  50  away from the connecting base  71 . The torsion springs  74  are then deformed to store elastic energy. When the electronic device  200  needs to be used, the free end  731  disengages from the display body  50 , so that the curtain  10  automatically rolls up on the pivot shaft  35 , driven by the torsion springs  74 , thereby exposing the screen  55  of the liquid crystal television  200 . 
         [0033]    It should be appreciated that the torsion springs  74  may be replaced by other driving members, such as an electronic motor to drive the pivot shaft  72 . 
         [0034]    It is believed that the present embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the disclosure or sacrificing all of its material advantages.