Abstract:
An electronic device enclosure includes a chassis, a drive bracket, and an air duct. The drive bracket is secured to the chassis and defines a subspace for receiving a disk drive. The air duct is rotatably secured to the drive bracket, and rotatable between a first position, where the subspace is exposed, and a second position, where the subspace is covered by the air duct.

Description:
BACKGROUND 
     1. Technical Field 
     The present disclosure relates to an electronic device enclosure with an air duct. 
     2. Description of Related Art 
     In a computer system, a disk drive, such as a hard disk drive, is needed for storing data. The cooling efficiency of the disk drive is low because it is hard to make air flow about the disk drive, therefore there is room for improvement in the art. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       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. 
         FIG. 1  is an exploded view of an electronic device in accordance with an embodiment. 
         FIG. 2  is an enlarged view of portion II of  FIG. 1 . 
         FIG. 3  is an enlarged view of portion III of  FIG. 1 . 
         FIG. 4  is an assembled view of a drive bracket and an air cut of  FIG. 1 . 
         FIG. 5  is similar to  FIG. 4 , but shows the air duct in a second position. 
         FIG. 6  is similar to  FIG. 5 , but shows the air duct in a third position. 
         FIG. 7  is an assembled view of  FIG. 1 . 
         FIG. 8  is similar to  FIG. 7 , but does not show an intermediate plate of  FIG. 1 . 
     
    
    
     DETAILED DESCRIPTION 
     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. 
     Referring to  FIG. 1 , an electronic device enclosure, in accordance with an embodiment, includes a chassis  10 , a drive bracket  20  and an air duct  30 . 
     The chassis  10  includes a bottom plate  11 , a first side plate  13 , a second side plate  14 , and a rear plate  15 . The first and second side plates  13 ,  14  are located on two opposite edges of the bottom plate  11 . The rear plate  15  is connected to the first and second side plates  13 ,  14 . An intermediate plate  40  is located on the bottom plate  11  between the first and second side plates  13 ,  14 . A number of ventilation holes  151  adjacent the first side plate  13  are defined in the rear plate  15 . In an embodiment, the first and second side plates  13 ,  14  are substantially parallel to each other and substantially perpendicular to the bottom plate  11  and the rear plate  15 , and the rear plate  15  is substantially perpendicular to the bottom plate  11 . 
     The drive bracket  20  includes a bottom wall  21 , a top wall  23 , a first sidewall  25 , and a second sidewall  27 . The bottom wall  21  and the top wall  23  are connected by the first and second sidewalls  25 ,  27 . The bottom wall  21 , the top wall  23 , and the first and second sidewalls  25 ,  27  define a space  201 . A number of separating walls  29  are located both between the bottom wall  21  and the top wall  23  and between the first and second sidewalls  25 ,  27 , to divide the space  201  into a number of subspaces  203 . The separating walls  29  are smaller than the first and second sidewalls  25 ,  27 . Each subspace  203  is configured to receive a disk drive, such as a hard disk drive. In an embodiment, the top wall  23  is substantially parallel to the bottom wall  21  and substantially perpendicular to the first and second sidewalls  25 ,  27 , and the first and second sidewalls  25 ,  27  are substantially parallel to each other. 
     Two resiliently distortable locking pieces  213  are located on an edge of the bottom wall  21 . A locking hole  2131  (shown in  FIG. 4 ) is defined in each locking piece  213 . Two first pivot pieces  231  are located on an edge of the top wall  23 , corresponding to the locking pieces  213 . Referring to  FIG. 2 , a first pivot hole  2311  is defined in each first pivot piece  231 . A number of first through openings  251  is the first sidewall  25 . A second through opening  271  is defined in the second sidewall  27 . A number of third through openings  291  is defined in each separating wall  29 . 
     The air duct  30  includes a base board  31  and a number of shielding boards  33 . Referring  FIG. 3 , two second pivot pieces  311  are located on a top edge of the base board  31 , corresponding to the first pivot pieces  231  of the drive bracket  20 . A second pivot hole  3110  is defined in each second pivot piece  311 . Two locking tabs  313  are located on a bottom edge of the base board  31 , for engaging in the locking holes  2131  of the drive bracket  20 . A distance between two adjacent shielding boards  33  is generally equal to a distance between two adjacent separating walls  29 . In an embodiment, the shielding boards  33  are substantially perpendicular to the base board  31 . 
     Referring to  FIGS. 4-6 , the air duct  30  is attached to the drive bracket  20 . The first pivot holes  2311  of the first pivot pieces  231  are aligned with the second pivot holes  3110  of the second pivot pieces  311 . Two fasteners  70 , such as screws, are engaged into the first and second pivot holes  2311  and  3110 , to secure the air duct  30  to the drive bracket  20 . 
     The air duct  30  can be rotated between a first position (shown in  FIG. 4 ) and a second position (shown in  FIG. 6 ). In the first position, the air duct  30  is rotated to position above the top wall  23 , to uncover the subspace  203  of the drive bracket  20 , and the locking tabs  313  are disengaged from the locking holes  2131  of the locking pieces  213 . In the second position, the air duct  30  is rotated to cover the subspace  203  of the drive bracket  20 . The locking tabs  313  are engaged in the locking holes  2131  of the locking pieces  213 . The shielding boards  33  abut the separating walls  29  of the drive bracket  20 , to prevent air flowing out of the subspace  203  in a direction substantially perpendicular to the base board  31 . 
     Referring to  FIG. 1 , the electronic device enclosure in accordance with an embodiment further includes a first air guiding bracket  50  and a second air guiding bracket  60 . The first air guiding bracket  50  is secured to the second sidewall  27  of the drive bracket  20 , to enclose the second through opening  271  of the second sidewall  27 . The second air guiding bracket  60  is secured to the first air guiding bracket  50  and attached to the rear plate  15  of the chassis  10 , to enclose the ventilation holes  151  of the rear plate  15 . The first and second air guiding brackets  50 ,  60  are configured for guiding air flowing from outside the chassis  10  to the drive bracket  20  via the ventilation holes  151  and the through opening  271 . 
     Referring to  FIGS. 7 and 8 , the air duct  30  is secured to the drive bracket  20  and positioned in the second position. The first and second air guiding bracket  50 ,  60  are secured to the drive bracket  20 . The drive bracket  20  is secured to the bottom plate  11  of the chassis  10 . The ventilation holes  151  of the rear plate  15  are enclosed by the second air guiding bracket  60 . 
     In use, air flows in turn from outside of the chassis  10 , through the ventilation holes  151 , the second air guiding bracket  60 , the first air guiding bracket  50 , and the second through opening  271 , to the drive bracket  20 . Because the air duct  30  covers the subspace  203  of the drive bracket  20 , the air flows through the third through opening  291  of the separating wall  29  and the first through opening  251  of the first sidewall  25 . Thus, the disk drive secured to the subspace  203  of the drive bracket  20  can be cooled. 
     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.