Abstract:
A computer casing includes a support device, which extends outward from the surface of the computer casing. The support device further includes a support part, which juts out of the surface of the computer casing, and a plurality of joining parts, which juts out from the support part.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     The present invention is related to structure of a computer casing, and particularly to a computer casing, which provides a support device to hold the radiation device.  
         [0003]     2. Brief Description of the Related Art  
         [0004]     Referring to  FIG. 1 , a computer usually includes a casing  11 , a support member  12 , a main board  13  and a radiation device  14 . The casing  11  has a plurality of connecting units  111  and the connecting units  111  have a receiving hole  111   a  respectively to engage with the fixing elements  111   b . The support member  12  provides a support part  122  and a plurality of connecting units  122   a  are disposed on the support part  122 . Each of the connecting units  122   a  has a receiving hole  122   b  for engaging with a fixing element  144   a  respectively. The main board  13  is provided with a CPU base  131  to be attached with a CPU  132 . The radiation device  14  includes a cooling fan  141 , a radiator  142 , a retaining tool  143  and a support base  144 . The cooling fan  141  is fixed to the radiator  142  with fixing elements  141   a  and the radiator  142  has hook receiving parts  142   a  to engage with hook parts  143   a  of the retaining tool  143 . The retaining tool  143  has a receiving opening  143   b  at both ends thereof and the receiving opening  143   b  to fit with a projection  144   c  of the support base  144 . The retaining tool  143  has a receiving opening  143   c  to fit with a further projection  144   b  of the support base  144 .  
         [0005]     Referring to  FIG. 2  in company with  FIG. 1 , while in assembling, the cooling fan  141  can be attached to the radiator  142  with the fixing elements  141   a . The radiator  142  is attached to the support base  144  with the retaining tool  143  and allowing the bottom of the radiator  142  contacting with the CPU  132 . Further, the support base  144  is fixedly attached to the main board  13  with the fixing element  144   a  such that the support member  12  can be mounted under the main board  13 . Finally, the main board  13  can be joined to the connecting units  111  of the casing  11  via the fixing elements  111   b  passing through the mounting holes  133  of the main board  13 .  
         [0006]     However, the preceding conventional computer casing has the following disadvantages:  
         [0007]     The support member  12  is externally added to the casing  11  for supporting the main board  13  and the radiation device  14  to avoid the main board  13  being deformed or damaged resulting from excessive weight of the radiation device  14 . That is, the support member  12  can make up the support strength of the main board  13 . But, the support member  12  makes the production cost of the casing increase a lot in order to strengthen the main board.  
         [0008]     The support member  12  being externally added to the casing  11  increases the gross weight of the computer and more parts have to be detached during repairing due to the support member  12  and this is one of inconvenient factors.  
       SUMMARY OF THE INVENTION  
       [0009]     A primary object of the present invention is to provide a computer casing, which has enough strength to support the radiation device.  
         [0010]     Another object of the present invention is to provide a computer casing with low production cost.  
         [0011]     A further object of the present invention is to provide a computer casing with low material cost.  
         [0012]     A further object of the present invention is to provide a computer casing, which can reduce the overall weight thereof. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0013]     The detail structure, the applied principle, the function and the effectiveness of the present invention can be more fully understood with reference to the following description and accompanying drawings, in which:  
         [0014]      FIG. 1  is an exploded perspective view of a conventional computer casing;  
         [0015]      FIG. 2  is an assembled perspective view of the conventional computer casing shown in  FIG. 1 ;  
         [0016]      FIG. 3  is an exploded perspective view of a computer casing according to the present invention; and  
         [0017]      FIG. 4  is an assembled sectional view of the computer casing shown in  FIG. 3 . 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0018]     Referring to  FIG. 3 , a computer casing  21  according to the present invention in the preferred embodiment thereof includes a plurality of connecting units  211  and each of the connecting units  211  has an engaging hole  211   a  for being engaged with a fastening element  211   b  respectively. There is a support device  22  at the inner surface  212  of the computer casing  21  and extends upward from the inner surface  212 . The support device  22  includes a support part  222  extending upward from the inner surface  212  and a joining part  223  extending upward from the surface  222   a  of the support part  222 .  
         [0019]     The support part  222  provides a shape of approximate “H” and the joining part  223  provides a shape approximate “X”. The joining part  223  has a plurality of connecting units  223   a  and each of the connecting units  223   a  has receiving holes  223   b  for being inserted with fixing elements  244   a.    
         [0020]     The computer is attached with a main board  23  and the main board  23  is provided with a CPU base  231 . The CPU base  231  is attached with a CPU  232 . The main board  23  has a plurality of mounting holes  233  corresponding the engaging holes  211   a  of the connecting units  211 .  
         [0021]     The computer is also attached with a radiation device  24  and the radiation device  24  includes a cooling fan  241 , a radiator, a retaining tool  243  and a support base  244 . The cooling fan  241  is attached to the radiator  242  with fixing elements  241   a  and the radiator  242  is provided with a hook receiving part  242   a  for engaging with the hook part  243   a  of the retaining tool  243 . The retaining tool  243  at both ends thereof has a receiving opening  243   b  respectively and the receiving opening  243   b  fits with a jut  244   c  on the support base  244  respectively. The retaining tool  243  at the middle section thereof has a receiving hole  243   c  and the receiving hole  243   c  can fit with a jut  244   b  on the support base  244 .  
         [0022]     Referring to  FIG. 4  in company with  FIG. 3 , the cooling fan  241  is fixedly attached to each other with the fixing elements  241   a  and the radiator  242  is mounted to the support base  244  with the retaining tool  243  and the bottom of the radiator  242  touches the CPU  232 . Then, the support base  244  is fixedly attached to the main board  23  and the main board  23  is mounted to the support device  22 . Finally, the fastening elements  211   b  pass through the mounting holes  233  to engage the main board  23  to the computer casing  21 .  
         [0023]     It is appreciated that contracting to the prior art, the computer casing of the present invention has the following advantages:  
         [0024]     1. Due to the computer casing  21  of the present invention being worked directly to form the support device  22  for supporting the main board  23  and the radiator  24 , the main board  23  can endure weight of the radiation device  24  without being deformed or becoming damage. In short, the support device  22  can reinforce the structural strength of the main board  21 . Further, the computer casing  21  needs less production cost and material cost than the prior art.  
         [0025]     2. The computer casing  21  is worked integrally to form the support device  22  so that the gross weight of the computer casing  21  is reduced and it is facilitate to being set up.  
         [0026]     While the invention has been described with referencing to a preferred embodiment thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention, which is defined by the appended claims.