Abstract:
A folding electronic with protection against an opened cover pulling it over backwards has a base which includes at least one ejecting structure. A stability plate is fixed on the ejecting structure. When the cover is opened relative to the base, the stability plate extends from the base to provide additional support for the folding electronic device.

Description:
FIELD 
       [0001]    The present disclosure relates to electronic devices, and particularly to a folding electronic device having a stability function. 
       BACKGROUND 
       [0002]    A notebook may include a base and a cover capable of being opened and closed relative to the base. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0003]    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 embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the three views. 
           [0004]      FIG. 1  is a perspective view of a folding electronic device in a closed state. 
           [0005]      FIG. 2  is a perspective view of the folding electronic device of  FIG. 1  in an open state. 
           [0006]      FIG. 3  is similar to  FIG. 2 , but viewed from another angle. 
           [0007]      FIG. 4  is an exploded perspective view of a base, an ejecting structure, and a stability plate of the folding electronic device of  FIG. 2 . 
           [0008]      FIG. 5  is a partially enlarged perspective view of  FIG. 4 . 
           [0009]      FIG. 6  is similar to  FIG. 5 , but viewed from another angle. 
           [0010]      FIG. 7  is an assembled perspective view of the structures of  FIG. 5 . 
           [0011]      FIG. 8  is similar to  FIG. 7 , but showing the stability plate ejected. 
           [0012]      FIG. 9  is a perspective view showing the stability plate extended out of the base. 
       
    
    
     DETAILED DESCRIPTION 
       [0013]    The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean “at least one.” 
         [0014]    Referring to  FIGS. 1-3 , a folding electronic device  100  is on a supporting surface  200 . The folding electronic device  100  includes a base  10 , a cover  20 , and a stability plate  40 . The cover  20  can be coupled to the base  10 , and capable of being opened and closed relative to the base  10 . The base  10  comprises at least one ejecting structure  30 . The stability plate  40  is fixed to the ejecting structure  30 . When the cover  20  is opened relative to the base  10 , the stability plate  40  is extended from the base  10  by the ejecting structure  30  to lend additional support and stability to the folding electronic device  100 , to prevent the base  10  from being overbalanced by the cover  20 . In the embodiment, the folding electronic device  100  is a notebook or other folding device. 
         [0015]    Referring to  FIGS. 4-6 , the base  10  includes a bottom case  11  and a top case  12  engaging with the bottom case  11 . The bottom case  11  includes a main body  110 , a first sidewall  111 , a second sidewall  112  and a third sidewall  113 . The main body  110  is substantially rectangular. The first sidewall  111 , the second sidewall  112  and the third sidewall  113  extend towards the top case  12  from edges of the main body  110 . The first sidewall  111  is opposite to the third sidewall  113 . The second sidewall  112  is connected between the first sidewall  111  and the third side wall  113 . A first through hole  1111  is defined at the center of the first sidewall  111 , and a second through hole  1131  is defined at the center of the third sidewall  113  corresponding to the first through hole  1111 . A pivoting edge  114  is located at a side of the main body  110  away from the second sidewall  112 . The pivoting edge  114  pivotally connects the cover  20  to the base  10 . The main body  110  includes an inner surface  115  facing the top case  12  and an outer surface  116  opposite to the inner surface  115 . Two mounting portions  117  are symmetrically arranged on the inner surface  115 , and respectively adjacent to the first sidewall  111  and the third sidewall  113 . 
         [0016]    Each mounting portion  117  includes a sliding groove  1171 , an engaging groove  1172 , and a first fixing portion  1173 . The sliding groove  1171  is formed on the inner surface  115 . The sliding groove  1171  is adjacent to the first sidewall  111  and is perpendicular to the pivoting edge  114 . A length of the sliding groove  1171  is about one half of that of the first sidewall  111 . The sliding groove  1171  defines a first opening  11711  at the bottom, passing through the inner surface  115  and the outer surface  116  perpendicularly. The engaging groove  1172  forms a recessed portion on the inner surface  115  adjacent to the first through hole  1111 . The engaging groove  1172  is substantially L shaped. The engaging groove  1172  includes a first groove  11721  and a second groove  11722  perpendicularly connected to the first groove  11721  corresponding to the first through hole  1111 . The first groove  11721  is parallel to the sliding groove  1171 . The second groove  11722  defines a first stopping portion  11723  abutting the first groove  11721 . The first stopping portion  11723  is a rib perpendicularly extending from the inner surface  115 . The first stopping portion  11723  is substantially U shaped and has an opening towards the first through hole  1111 . The first fixing portion  1173  is a protrusion post perpendicularly protruding from the inner surface  115  and arranged between the first sidewall  111  and the pivoting edge  114 . The first fixing portion  1173  defines a first screw hole  11731 . 
         [0017]    The ejecting structure  30  includes a sliding member  31 , an engaging member  32 , a compression spring  33 , and a tension spring  34 . The sliding member  31  is substantially elongated and slidably located in the sliding groove  1171 . The sliding member  31  defines a plurality of second screw holes  311  and a plurality of positioning holes  312  at one end, and defines a first hook  313  and a second fixing portion  314  at the other end. The second screw holes  311  and the positioning holes  312  alternate in a straight line. The second fixing portion  314  defines a third screw hole  3141 . In the embodiment, the base  10  includes two ejecting structures  30  corresponding to the two mounting portions  117 . 
         [0018]    The engaging member  32  is arranged in the engaging groove  1172 , and detachably engaged with the sliding member  31 . The engaging member  32  is substantially “L”-shaped. The engaging member  32  includes a first arm  321  corresponding to the first groove  11721  and a second arm  322  corresponding to the second groove  11722 . The first arm  321  is perpendicularly connected to the second arm  322 . A width of the first arm  321  is smaller than that of the first groove  11721 . A width of the second arm  322  is substantially the same to that of the second groove  11722 . The first arm  321  defines a second hook  323  at one end away from the second arm  322  corresponding to the first hook  313 . An operation portion  324  is arranged at one end of the second arm  322  away from the first arm  321 . The second arm  322  defines a third through hole  325  corresponding to the first stopping portion  11723 . The third through hole  325  is adjacent to the first arm  321 . The second arm  322  defines a second stopping portion  326  recessed from a surface of the second arm  322 . The second stopping portion  326  is located between the operating portion  324  and the third through hole  325 . 
         [0019]    The compression spring  33  is located between the first stopping portion  11723  and the second stopping portion  326 . When a force is applied to the operation portion  324 , the compression spring  33  is compressed and the engaging member  32  slides along the engaging groove  1172 . At this time, the second stopping portion  326  moves towards the first stopping portion  11723  to further compress the compression spring  33 , and the operation portion  324  is received in the bottom case  11 . When the force applied to operation portion  324  is removed, the compression spring  33  recovers to expose the operation portion  324  out from the bottom case  11 . 
         [0020]    The tension spring  34  is fixed between the first fixing portion  1173  and the second fixing portion  314  by screws. When the first hook  313  engages with the second hook  323 , the tension spring  34  is stretched. When the first hook  313  detaches from the second hook  323 , the tension spring  34  recovers to drive the sliding member  31  towards the pivoting edge  114 , to extend the stability plate  40  out of the bottom case  11 . 
         [0021]    The stability plate  40  is secured to the sliding member  31 . The stability plate  40  is a substantially rectangular sheet. The stability plate  40  includes two third fixing portions  41  and two elastic supporting blocks  42 . Each third fixing portion  41  includes a plurality of fourth through holes  411  corresponding to the second screw holes  311  and a plurality of positioning posts  412  corresponding to the positioning holes  312 . The supporting block  42  is arranged on the surface of the stability plate  40  away from the outer surface  116  and adjacent to the third fixing portion  41 . 
         [0022]    Referring to  FIG. 7 , in assembly, the sliding member  31  is first located in the sliding groove  1171 . The stability plate  40  is secured to the sliding member  31  using screws through the fourth through hole  411 , the first opening  11711 , and the second screw hole  311 . The tension spring  34  is secured between the first fixing portion  1173  and the second fixing portion  314  by screws. The engaging member  32  is arranged in the engaging groove  1172 . Therefore, the first stopping portion  11723  can pass through the third through hole  325  to be exposed out of the second arm  322 , and the operation portion  324  can pass through the first through hole  1111  to be exposed out of the bottom case  11 . The compression spring  33  is arranged between the first stopping portion  11723  and the second stopping portion  326 . The first hook  313  is engaged with the second hook  323  and the tension spring  34  is stretched to retain and hide the stability plate  40  within the bottom case  11 . 
         [0023]    Referring to  FIG. 8  and  FIG. 9 , when a force is applied to the operation portion  324 , the compression spring  33  acts to detach the first hook  313  from the second hook  323 . At this time, the stretched tension spring  34  is allowed to recover, to drive the sliding member  31  to slide towards the pivoting edge  114 , to extend the stability plate  40  out of the bottom case  11 . Thus, the stability plate  40  provides support to the folding electronic device  100  to prevent the base  10  from being overbalanced by the cover  20 , even when the cover  20  is opened more than  90  degrees from the base  10 . 
         [0024]    It is to be understood, even though information as to, and advantages of, the present embodiments have been set forth in the foregoing description, together with details of the structures and functions of the present embodiments, the disclosure is illustrative only; and that 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.