Abstract:
A folding device includes a housing, a cover, at least one pivoting member, a torsion spring, and at least one resisting member. The cover folds down on the housing. The pivoting member is fixed to the cover. The pivoting member has a pivot. The pivot is rotatably inserted into the housing to pivot the cover on the housing. The torsion spring provides a constant elastic force for opening and supporting the cover. The at least one resisting member resists against the pivoting member to prevent the pivot disengaging from the housing.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The present disclosure relates to folding devices, and particularly to a folding electronic device. 
         [0003]    2. Description of Related Art 
         [0004]    Folding devices, such as DVD players, include a main body defining two pivot holes, a cover having two pivots, and two torsion springs. The two pivot holes are positioned at opposite ends of the main body. The pivots protrude from opposite ends of the cover in the same direction. The torsion springs provide a force to open and support the cover. However, the torsion springs commonly support asymmetric positions of the cover because of the structure of the folding device. When the cover is closed, the torsion spring not only develops a stronger force for opening the cover, but the force encourages the pivots to disengage from the pivot holes, such that the cover may move upwards under the force causing an undesirable space to be formed between the cover and the main body. 
         [0005]    Therefore, there is room for improvement within the art. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0006]    Many aspects of the embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
           [0007]      FIG. 1  is an isometric view of a folding device in an open state, the folding device includes a resisting member. 
           [0008]      FIG. 2  is an exploded view of the folding device in  FIG. 1 . 
           [0009]      FIG. 3  is an inverted view of the folding device in  FIG. 2 . 
           [0010]      FIG. 4  is an isometric view of the resisting member in  FIG. 1 . 
           [0011]      FIG. 5  is an inverted view of the resisting member in  FIG. 4 . 
           [0012]      FIG. 6  is a partial enlarged view of the folding device of  FIG. 1  but viewed from an inverted aspect. 
       
    
    
     DETAILED DESCRIPTION 
       [0013]    Referring to  FIGS. 1 and 2 , a folding device  100  in accordance with an embodiment is shown. In this embodiment, the folding device  100  is a DVD player. The folding device  100  includes a cover  10 , two pivoting members  20   a ,  20   b , a housing  30 , two torsion springs  40 , and two resisting members  50   a ,  50   b . The pivoting members  20   a  and  20   b  protrude from the cover  10 , the pivoting members  20   a ,  20   b  pivot on the housing  30  to enable the cover  10  to rotate about the housing  30 . The cover  10  is capable of being folded down on the housing  30 . The torsion springs  40  provide a constant elastic force urging the cover  20  to open. The resisting members  50   a ,  50   b  resist the pivoting members  20  to prevent the pivot members  20  disengaging from the housing  30 . 
         [0014]    Referring to  FIG. 3 , one side  14  of the cover  10  is connected to the housing  30 . The cover  10  is rectangular. The cover  10  includes a first surface  11  facing the housing  30 , and a second surface  12  opposite to the first surface  11 . The first surface  11  defines two positioning slots  13  adjacent to the side  14 . 
         [0015]    The pivoting members  20   a ,  20   b  are located in the first surface  11 , adjacent to the side  14 , and symmetrical about the center of the cover  10 . The pivoting members  20   a ,  20   b  are adjacent to the positioning slots  13 . The distance between the pivoting member  20   a  and the nearest positioning recess  13  is different from the distance between the pivoting member  20   b  and the position recess  13  nearest the pivoting member  20   b . Each of the pivoting members  20   a ,  20   b  includes a main body  21 , and a pivot  22 . The pivot  22  extends from the main body  21  parallel to the side  14 . Therefore, the pivot  22  of the pivoting member  20   a  is between the two main bodies  21  of the pivoting members  20   a  and  20   b . The pivot  22  of the other pivot member  20   b  is not between the two main bodies  21  of the pivoting members  20   a  and  20   b.    
         [0016]    The housing  30  includes an upper casing  31 , and a lower casing (not shown). The upper casing  31  is assembled to the lower casing to form a receiving space to receive electronic components (not shown). The upper casing  31  includes a top surface  310 , a bottom surface  311  opposite to the top surface  310 , a receiving part  33 , two positioning grooves  35 , two connecting parts  36 , and two securing parts  37   a ,  37   b . The receiving part  33  is positioned in the middle of the upper casing  31 . Viewed from the top surface  310 , the receiving part  33  is recessed into the top surface. Viewed from the bottom surface  311 , the receiving part  33  protrudes from the bottom surface  311 . The size of the receiving part  33  fits the cover  10 . The cover  10  is received in the receiving part  33  and the first surface  11  and the top surface  310  are coplanar when the cover  10  is folded down on the housing  30 . The receiving part  33  defines two openings  34  through the top surface  310  and the bottom surface  311 . The openings  34  correspond to the pivoting members  20   a  and  20   b  to allow the pivoting members  20   a  and  20   b  to pass through the upper casing  31 . The connecting parts  36  protrude from the bottom surface  311 , and are adjacent to the openings  34 . Each connecting part  36  defines a pivot hole (not shown). The pivot  22  is received in the pivot hole, such that the cover  10  is pivoted to the housing  30 . The receiving grooves  35  are defined in the upper casing  31 , the receiving grooves  35  are adjacent to the openings  34  and are located between the openings  34 . The receiving grooves  35  correspond to the positioning slots  13 . 
         [0017]    Each of the securing parts  37   a  and  37   b  includes a hook  370 , a screw post  371 , and two positioning posts  372 . The hook  370 , the screw post  371 , and positioning posts  372  are arranged around the openings  34 . The difference between the securing part  37   a  and the securing part  37   b  is that the layout of the screw posts  371  and positioning posts  372  is different. 
         [0018]    Each torsion spring  40  includes spring body  41 , a first end  42 , and a second end  43 . The first end  42  and the second end  43  extend from opposite ends of the main body  41 . The first end  41  is positioned in the positioning slot  13 . The main body  41  and the second end  43  are secured in the positioning groove  35 . 
         [0019]    Referring to  FIGS. 4 and 5 , the resisting members  50   a ,  50   b  are secured to the upper casing  31 . The resisting member  50   a  includes a securing part  51 , and a blocking arm  52  protruding from the securing part  51 . The securing part  51  is fixed to bottom surface  311 . The securing part  51  includes a first fixing board  510 , second fixing board  512 , and a third fixing board  511 . The first fixing board  510  is parallel to the third fixing board  512  and there is a space  513  between the first fixing board  510  and third fixing board  512 . The third fixing board  511  is connected between the first fixing board  510  and the second fixing board  512 . The surfaces of the first fixing board  510 , the third fixing board  511 , and the second fixing board  512  facing the upper casing  31  are all coplanar. A clasping member  5101  perpendicularly protrudes from the first fixing board  510  toward the upper casing  31 , and corresponds to the hook  370 . A sleeve  5111  protrudes from the middle of the third fixing board  511 , and corresponds to the screw post  371 . Two positioning holes  5121  corresponding to the positioning posts  372  are defined in the second fixing board  512  and the first fixing board  510 . The blocking arm  52  is positioned at the first fixing board  510 , and faces the upper casing  31 . A first blocking board  520  and a second blocking board  521  extend from one end of the blocking arm  52  and are located outside of the first fixing board  510 . The first and the second blocking boards  520  and  521  are elastic. The first blocking board  520  faces the second fixing board  512 . A hemispherical tab  5201  perpendicularly protrudes from one side  5202  of blocking board  520  toward the second fixing board  512 . 
         [0020]    The resisting member  50   b  is similar to the resisting member  50   a . The differences between the resisting members  50   b  and  50   a  are that the resisting member  50   b  omits the third fixing board  512 , the sleeve  5111  and the positioning holes  5121  are located in the third fixing board  511 , the positioning holes  5121  are defined in the middle of the third fixing board  511 , and the sleeve  5111  protrudes from the distal end of the third fixing board  511 . 
         [0021]    Referring to  FIG. 6 , the assembly of the resisting member  50   a  is shown. First, the positioning posts  372  are passed through the positioning holes  5121 , the screw post  371  is passed through the sleeve  5111 , the hook  370  is clasped by the clasping member  5101 , and a screw (not shown) is screwed into the screw post  371  such that the resisting member  50  is secured to the upper casing  31 . At this time, the tab  5201  of the resisting member  50  resists one side of the pivoting members  20  away from the pivot  22 . The blocking board  521  is away from the pivoting members  20  and supports the upper casing  31 . Assembly of the resisting member  50   b  is the same as assembly of the resisting member  50   a.    
         [0022]    When the cover  10  is folded down on the housing  30 , the tab  5201  resists one side of the pivoting member  20  away from the pivot  22 . Therefore, the pivot  22  cannot disengage from the connecting parts  36 , the torsion springs  40  cannot force the cover  10  to deviate from the proper position. An undesirable gap between the cover  10  and the housing  30  does not exist. 
         [0023]    Even though relevant information and the advantages of the present embodiments have been set forth in the foregoing description, together with details of the functions of the present embodiments, the disclosure is illustrative only; and changes may be made in detail, especially in the matters of shape, size, and arrangement of parts within the principles of the present embodiments to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.