Abstract:
An electronic device includes a chassis enclosing a fan and a sliding member. The chassis defines an air intake aligned with an inlet of the fan, and an opening. The sliding member is slidably mounted to the chassis and includes an operation part exposing through the opening. The sliding member is capable of either fully or partially covering and uncovering the air intake of the chassis via manipulating the operation part to slide in the opening.

Description:
BACKGROUND 
   1. Technical Field 
   The present disclosure relates to electronic devices and, more particularly, to an electronic device having an air regulation apparatus. 
   2. Description of Related Art 
   An electronic device, such as a storage bridge bay (SBB), generally includes a plurality of components mounted thereto. The plurality of components is controlled by a control module and will generate a large quantity of heat during work. However, the plurality of components generally will not work synchronously, thus the control module will output several different powers according to the number of the components working at any given time. Therefore, several heat dissipation apparatuses need to be designed to satisfy different powers of the control module, which is costly. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is an exploded, isometric view of an exemplary embodiment of an electronic device, the electronic device including a chassis with a cover, and a sliding member. 
       FIG. 2  is an inverted, enlarged view of the cover of  FIG. 1 . 
       FIG. 3  is an inverted, enlarged view of the sliding member of  FIG. 1 . 
       FIG. 4  is an assembled view of the electronic device of  FIG. 1 , but viewed from another perspective. 
       FIG. 5  is similar to  FIG. 4 , but showing the sliding member in a use state. 
   

   DETAILED DESCRIPTION 
   Referring to  FIGS. 1 to 3 , an exemplary embodiment of an electronic device includes a chassis  10 , a heat dissipation module  50  and a control module  60  mounted in the chassis  10 , two guiding members  30 , and a sliding member  20 . 
   The chassis  10  includes a cover  40  and a base  70 . The cover  40  includes a top wall  41  defining an air intake that includes a plurality of first vent holes  47  in an end of the top wall  41 . A rectangular opening  42  is defined in the top wall  41  between the plurality of first vent holes  47  and an opposite end of the top wall  41  and adjacent to the plurality of first vent holes  47 . Two first positioning holes  43  are defined in the top wall  41  at opposite sides of the opening  42  and adjacent to the plurality of first vent holes  47 . Two second positioning holes  44  are defined in the top wall  41  at opposite sides of the opening  42 . Two third positioning holes  45  are defined in the top wall  41  at opposite sides of the opening  42  and away from the plurality of first vent holes  47 . Each second positioning hole  44  is located between a corresponding first positioning hole  43  and a corresponding third positioning hole  45 . The base  70  includes a bottom wall  71  for supporting the heat dissipation module  50  and the control module  60 , and an end wall  72  (labeled in  FIGS. 4 and 5 ) perpendicularly extending from an end of the bottom wall  71 . A plurality of second vent holes  73  (labeled in  FIGS. 4 and 5 ) is defined in the end wall  72 . 
   In this instant embodiment, the heat dissipation module  50  includes two fans mounted to the bottom wall  71  of the base  70 . Each fan  51  includes an inlet  52  in the top of the fan  51 , and an outlet  53  perpendicular to the inlet  52 ; and aligned with the plurality of second vent holes  73 . 
   The control module  60  is mounted to the bottom wall  71  of the base  70  opposite to the end wall  72 . An interface  62  extends from the control module  60 , and is configured for connecting to other components (not shown) to control data storage devices (not shown) of the electronic device to communicate with the other components. 
   The guiding members  30  are mounted to opposite sides of the bottom of the top wall  41 . Each guiding member  30  includes a fixing part  32  fixed to the top wall  41 , a guiding part  31  parallel to and spaced from the top wall  41 , and a connecting part  33  slantingly connected between the fixing part  32  and the guiding part  31 . A receiving space  34  is defined between the top wall  41  and the guiding part  31 . The guiding parts  31  of the guiding members  30  are opposite to each other. 
   The sliding member  20  includes a main body  21 . The main body  21  defines two slots  22  therein, parallel to opposite ends of the main body  21 , with a U-shaped elastic tab  23  formed between the slots  22 . An operation part  24  extends up from a free end of the elastic tab  23 . Two positioning posts  25  protrude up from the elastic tab  23 , at opposite sides of the operation part  24 . A reinforcing rib  27  extends down from a conjunction of the main body  21  and the elastic tab  23 . A connecting tab  26  is defined to bridge over the slots  22 , opposite to the conjunction of the main body  21  and the elastic tab  23 . 
   Referring to  FIGS. 4 and 5 , in assembly, the sliding member  20  is slidably mounted to the cover  40  of the chassis  10 , via the opposite ends of the main body  21  slidably received in the corresponding receiving spaces  34  between the guiding parts  31  of the guiding members  30  and the cover  40 . The elastic tab  23  covers the opening  42  of the cover  40 . The operation part  24  is exposed through the opening  42  of the cover  40 . The cover  40  is placed in position covering on the base  70  to enclose the heat dissipation module  50 , the control module  60 , and the data storage devices. The plurality of first vent holes  47  aligns with the inlets  52  of the fans  51  of the heat dissipation module  50 . 
   In use, when the electronic device is not operating, the positioning posts  25  of the sliding member  20  are engaged in the first positioning holes  43  of the cover  40 , and the main body  21  covers the plurality of first vent holes  47  to prevent foreign objects from entering into the electronic device. When the electronic device is operating at low power, such as 60 W, the operation part  24  is pressed downwardly to allow the elastic tab  23  to be resiliently deformed and the positioning posts  25  are removed from the first positioning holes  43 . Thus, the main body  21  slides relative the cover  40 , and with restoring force of the elastic tab  23 , the positioning posts  25  are engaged in the second positioning holes  44  to make the main body  21  cover only parts of the plurality of first vent holes  47 , to allow a small quantity of air to enter into the electronic device to dissipate heat. When the electronic device works at high power, such as 100 W, the positioning posts  25  are engaged in the third positioning holes  45  so that the main body  21  does not cover any of the plurality of first vent holes  47 , to allow a large quantity of air to enter into the electronic device to dissipate heat. The plurality of second vent holes  73  is configured to allow heated air to be expelled from the electronic device. 
   In other embodiments, the first to third positioning holes  43 - 45  and the positioning posts  25  can be omitted, or more positioning holes can be defined in the cover  40 , to create more positions the sliding member can be placed at, to satisfy different powers of the electronic device. 
   In this disclosure, the guiding members  30  and the sliding member  20  together form an air regulation apparatus to regulate input air of the electronic device. 
   It is believed that the present embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the disclosure or sacrificing all of its material advantages, the examples hereinbefore described merely being exemplary embodiments of the disclosure.