Abstract:
A computer enclosure includes a rear plate. The rear plate defines a plurality of ventilation holes therein. A first rib, a second rib and a third rib is located on the rear plate. The first rib surrounds the ventilation holes. The third rib surrounds the first and second ribs.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The present disclosure relates to computer enclosures, and particularly to a computer enclosure with reinforced mounting areas. 
         [0003]    2. Description of Related Art 
         [0004]    A computer enclosure generally holds many electronic elements, such as a motherboard, hard disk drives, PCI devices, power supplies, fans, and so on. Usually, the PCI devices and the power supply are supported on a rear plate of the computer enclosure, which requires that the rear plate be a thick metal plate, such as a 1 mm metal plate, which adds to the expense of manufacturing the computer enclosure. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0005]    Many aspects of the embodiments can be better understood with references 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 several views. 
           [0006]      FIG. 1  is an isometric view of a computer enclosure in accordance with an embodiment. 
           [0007]      FIG. 2  is similar to  FIG. 1 , but showing from another aspect. 
           [0008]      FIG. 3  is an isometric view of a rear plate of the computer enclosure of  FIG. 2 . 
       
    
    
     DETAILED DESCRIPTION 
       [0009]    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. 
         [0010]    Referring to  FIGS. 1-2 , a computer enclosure in accordance with an embodiment includes a bottom plate  11 , two parallel side plates  12  perpendicular to the bottom plate  11 , and a front plate  14 . 
         [0011]    Referring also to  FIG. 3 , the rear plate  16  includes a PCI device mounting area  161 , an input/output (I/O) device mounting area  162 , a heat dissipating device mounting area  165 , and a power supply mounting area  167 . 
         [0012]    The PCI device mounting area  161  is configured to secure a plurality of PCI devices (not shown). A rectangular through opening  1611  is defined in a top portion of the PCI device mounting area  161 . A support piece  1612  is bent out perpendicularly from a bottom edge of the through opening  1611 . A plurality of PCI slots (not labeled) is defined in the PCI device mounting area  161  below the support piece  1612 , and extends in a vertical direction. A plurality of bridge pieces  1614  is formed on a bottom portion of the PCI device mounting area  161  below the PCI slots. 
         [0013]    The I/O device mounting area  162  is configured to secure a plurality of I/O devices thereon. A rectangular I/O opening  1621  is defined in the I/O device mounting area  162 . A plurality of tabs  1623  is bent from edges of the I/O opening  1621 , and configured to reinforce the I/O device mounting area  162  for I/O members, such as mouse connectors, keyboard connectors, and so on. The tabs  1623  are used to secure a rectangular shielding piece (not shown), which is capable of covering the I/O opening  1621 . 
         [0014]    The heat dissipating device mounting area  165  is formed on the rear plate  16  above the I/O device mounting area  162  and adjacent the PCI device mounting area  161 . A plurality of ventilation holes  1651  is defined in the heat dissipating device mounting area  165 , and arranged in a circular area. A first rib  1652  is formed in the heat dissipating device mounting area  165 , and surround the ventilation holes  1651 . A second rib  1653  is formed in the heat dissipating device mounting area  165  to surround as a rectangular shape, and is adjacent the first rib  1651 . A third rib  1655  is formed on the dissipating device mounting area  165 , and extends substantially around edges of the first rib  1652  and the second rib  1653 . Therefore, the first rib  1652  and the second rib  1653  are surrounded by the third rib  1655 . The first rib  1652 , the second rib  1653  and the third rib  1655  reinforce the heat dissipating device mounting area  1655 . 
         [0015]    The power supply mounting area  167  is positioned adjacent the I/O device mounting area  162  and the heat dissipating device mounting area  165 . A retaining piece  1671  is bent perpendicularly from the power supply mounting area  167 , for example by stamping, so as to form a power supply opening  1672 . A bent piece  1673  is perpendicular to the retaining piece  1671  and parallel to the bottom plate  11 . Two securing holes  1675  are defined in the bent piece  1673 . Two fasteners (not shown) are fixed in the securing holes  1675  to secure the bent piece  1673  on the bottom plate  11 , so as to increase the support for a power supply (not shown). A plurality of protrusions  1676  is located on the power supply mounting area adjacent corners of the power supply opening  1672 , thereby reinforcing the power supply mounting area  167 . 
         [0016]    Two long flanges  163  and two short flanges  164  are perpendicularly bent from edges of the rear plate  16 . A plurality of rolled pieces  1631  is formed at free edges of the long flanges  163 , thereby reinforcing the long flanges  163 , so as to prevent the long flanges  163  from easily deforming. 
         [0017]    In one embodiment, the rear plate  16  is not easily deformed, because of the support piece  1612 , the first rib  1651 , the second rib  1652 , the third rib  1655 , the retaining piece  1671 , the protrusions  1676 , the long flanges  163 , the short flanges  165 , and the rolled pieces  1631 . Therefore, the rear plate  16  can be made of a relatively thin metal plate, such as 0.4 mm metal plate, and still be strong enough to support the PCI devices, the I/O devices, the heat dissipating devices, and the power supply. 
         [0018]    It is to be understood, however, that even though numerous characteristics and advantages have been set forth in the foregoing description of embodiments, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.