Abstract:
A housing of an electronic device comprises a fixing portion and a locking portion. The fixing portion is perpendicularly disposed on a side wall of the housing. The locking portion is perpendicularly mounted on the bottom of the housing. The locking portion corresponds to the fixing portion. The fixing portion clasps a first end of the circuit board. The locking portion is secured to a second end of the circuit board opposite to the first end to mount the circuit board to the housing after the first end of the circuit board has been clasped by the fixing portion.

Description:
BACKGROUND 
     1. Technical Field 
     The present disclosure relates to electronic devices. 
     2. Description of Related Art 
     Electronic devices, such as DVD players, include a cover, a plurality of screws, and a circuit board mounted inside the cover. The bottom of the cover includes several cylindrical fixing portions. Each of the cylindrical fixing portions defines a blind hole with a screw structure. The circuit board defines several through-holes corresponding to the blind holes. Fixing members, such as screws, extend through the through-holes and the blind holes to secure the circuit board to the cover. However, securing the circuit board to the cover requires a plurality of screws and the screwing operation requires a lot of time. 
     Therefore, there is room for improvement in the art. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURE 
       The components of the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the embodiment of an electronic device. Moreover, in the drawings, like reference numerals designate corresponding parts throughout several views. 
         FIG. 1  is a schematic view of an electronic device, according to an embodiment. 
         FIG. 2  is a partially disassembled view of the housing of the electronic device of  FIG. 1 ; the electronic device includes an upper cover, a bottom cover and a circuit board. 
         FIG. 3  is a partially disassembled view showing the circuit board disengaged from the bottom cover. 
         FIG. 4  is a partially enlarged view of part IV of the electronic device of  FIG. 3 . 
     
    
    
     DETAILED DESCRIPTION 
     Embodiments of the present disclosure will be described in detail with reference to the drawings. 
       FIGS. 1 and 2  show an electronic device  100  of the embodiment. The electronic device  100  includes a housing  1 , a circuit board  3  received in the housing  1 , a fixing portion  5 , and a locking portion  7 . The fixing portion  5  and the locking portion  7  are mounted in the housing  1  for securing the circuit board  3 . In the embodiment, the electronic device  100  is a portable DVD player. 
     The housing  1  includes an upper cover  10  and a bottom cover  20  covering the upper cover  10 . In the embodiment, the bottom cover  2  cooperates with the upper cover  1  to form a closed space (not labeled) to receive the circuit board  3 . The upper cover  10  includes a top plate  11  and two first walls  12 . The top plate  11  is substantially rectangular. The first walls  12  perpendicularly extend from opposite edges of the top plate  11 . 
     Referring to  FIGS. 3 and 4 , the bottom cover  20  further includes a bottom plate  21  and four sidewalls  23 . The four sidewalls  23  extend perpendicularly from the four edges of the bottom plate  21 . The bottom plate  21  is substantially rectangular and corresponds to the top plate  11 . One of the sidewall  23  defines three operating holes parallel with each other (hereinafter, a first operating hole  212  and two second operating holes  213 ). The first operating hole  212  is set between the two second operating holes  213 . The first operating hole  212  and the second operating holes  213  are substantially rectangular. The center of the first operating hole  212  and the second operating holes  213  are aligned together (not shown) parallel with the bottom plate  21 . The first operating hole  212  and the second operating holes  213  respectively include a first edge  24  and a second edge  25  opposite to and parallel with the first edge  24 . Both of the first edge  24  and the second edge  25  are parallel with the bottom plate  21 . The first edge  24  is away from the bottom plate  21 , and the second edge  25  is adjacent to the bottom plate  21 . The length of the first edge  24  is longer than that of the second edge  25 . 
     The circuit board  3  is substantially a rectangular plate. In the embodiment, the circuit board  3  is a printed circuit board. The circuit board  3  defines a locking slot  31 . The locking slot  31  is set on the center of an edge of the circuit board  3  widthwise. The circuit board  3  further defines two through-holes  32 . The through-holes  32  are set on the edge of the circuit board  3  opposite to the locking slot  31 . In the embodiment, the through-holes  32  are equidistant from the locking slot  31 . 
     The fixing portion  5  is set on the inner surface of one of the sidewalls  23 . In the embodiment, the fixing portion  5  is set on one of the sidewalls  23  parallel with the first wall  12 . In other embodiments, a fixing portion  5  can be set on each of the sidewalls  23 . 
     The fixing portion  5  includes a limiting portion  51  and two supporting portions  53 . The limiting portion  51  extends from the first edge  24  of the first operating hole  212  and is parallel with the bottom plate  21 . The two supporting portions  53  extend from the second edge  25  of the second operating hole  213  and is parallel with the bottom plate  21 . The distance between longitudinal planes of the limiting portion  51  and the supporting portion  53  is slightly greater than the thickness of the circuit board  3 . 
     The limiting portion  51  includes a resisting plate  512 , two guiding plates  513  parallel with each other, and a blocking plate  514 . The resisting plate  512  is substantially rectangular. The resisting plate  512  perpendicularly extends from the first edge  24  of the first operating hole  212  away from the sidewall  23 , and is parallel with the bottom plate  21 . 
     The two guiding plates  513  slantingly extend from an end of the resisting plate  512  in a direction away the bottom plate  21 . The two guiding plates  513  are spaced from each other at a first predetermined distance. 
     The blocking plate  514  is disposed between the two guiding plates  513 . The blocking plate  514  perpendicularly extends from the end of the resisting plate  512  in a direction adjacent to the bottom plate  21 . The blocking plate  514  is spaced from the adjacent guiding plates  513  at a second predetermined distance. In the embodiment, the two guiding plates  513  and the blocking plate  514  extend from the end of the resisting plate  512  away from the sidewall  23  in opposite directions. 
     Each of the supporting plates  53  includes a supporting plate  531  and a guiding end  532 . The supporting plate  531  extends from the second edge  25  of the second operating hole  213  and is parallel to the bottom plate  21 . The guiding end  532  extends from an end of the supporting plate  531  away from the sidewall  23  in a direction adjacent to the bottom plate  21 . 
     The locking portion  7  is perpendicularly extends from the bottom plate  21 . The locking portion  7  includes two locking parts  71  parallel with each other and two fixing components  73  respectively engaging with the locking parts  71 . The line connecting with the two locking part  71  is parallel with the sidewall  23 . Each locking parts  71  substantially corresponds to the supporting portion  53 . The height of the locking part  71  is equal to the distance between the supporting portion  53  and the bottom plate  21 . Each locking part  71  is a substantially frustum of a cone and is perpendicularly set on the bottom plate  21 . Each of the locking parts  71  defines a locking hole  712  corresponding to the through-hole  32 . The locking hole  712  is a blind hole in a concavity depressed from the upper surface of the locking portion  71  in an axial direction. The inner surface of the locking hole  712  defines a screw thread for engaging with the fixing component  73 . The fixing component  73  is screwed into the locking hole  712  to fix the end of the circuit board  3  on the bottom plate  21 . In the embodiment, the fixing components  73  are two screws. 
     Referring to  FIG. 2  again, in assembly, the end of the circuit board  3  with the locking slot  31  is set on the guiding end  532 . By pushing the circuit board  3  towards the sidewall  23 , the end of the circuit board  3  with locking slot  31  is sandwiched between the limiting portion  51  and the two supporting portions  53 . The upper surface of the circuit board  3  abuts the limiting plate  512  and the lower surface of the circuit board  3  abuts the supporting plate  531 , with the locking slot  31  being locked to the blocking plate  514  for preventing the circuit board  3  moving in the direction parallel with the sidewall  23 . The fixing components  713  extend through the through-hole  32  and engage with the locking holes  712  via the two through-holes  32 . In the embodiment, the area of the circuit board  3  connected to the locking part  71  is an insulated region for preventing static. As a result, the circuit board  3  is very firmly and steadily mounted on the bottom cover  2 . 
     In disassembly, the fixing components  73  are screwed out of the locking holes  712 . By pushing the circuit board  3  away from the sidewall  23  via the first operating hole  212  or one of the second operating holes  213 , the circuit board  3  is moved along the guiding plates  513  to move away from the fixing portion  3 . As a result, the circuit board  3  can easily disengage with the bottom cover  2 . 
     While various exemplary and preferred embodiments have been described, the disclosure is not limited thereto. On the contrary, various modifications and similar arrangements (as would be apparent to those skilled in the art) are intended to also be covered. Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.