Abstract:
A server which is conformed to standard 1U server specifications has an inner width of 17 inches to house four sets of standard 3.5 inches hard disk drives in a juxtaposed manner. The server includes a casing which is divided in four housing spaces by three partitions. The partitions have improved features and a novel retrieval cradle is provided such that the server can accommodate required retrieval mechanisms for the hard disk drives thereby the hard disk drives may be housed in the casing smugly and are retrievable easily.

Description:
FIELD OF THE INVENTION  
         [0001]    The present invention relates to a server that contains four juxtaposed hard disk drives and particularly a server that conforms to industrial standard 1U19 inch specifications.  
         BACKGROUND OF THE INVENTION  
         [0002]    The commonly used industrial servers are generally modularly configured for housing in a server cabinet with a width of 19 inches. There is an industry accepted common standard that defines a cubic dimension of 19×19×1.75 inches (for length×width×height) as a base unit which is generally called 1U server specification. This standard facilitates modular design and makes configuration more convenient. However the rapid development and progress of high speed networks in recent years create great demands for hard disk drive quantity in the server and motherboard and interface function. To meet these requirements, industry has developed more server specifications based on the 1U specifications, such as 2U server specifications that have the height of 3 inches, and 3U server specifications that have the height of 4.5 inches. There are even 4U and 5U server specifications that have even more housing space.  
           [0003]    However there is also an increasing awareness in the industry that more server specifications such as 2U, 3U might help to increase housing apace for servers but does not always achieve more effective space utilization in the servers. It could even result in more space waste. The main problem is that server space utilization in the existing 1U specifications has reached a bottleneck. In the past, 1U server has an inner housing width of 17 inches (43.18 cm) and can accommodate maximum three sets of retrievable hard disk drives in a juxtaposed manner with a physical size of 4 inches (10.16 cm) wide to contain a hard disk drive of a standard width of 3.5 inches. Trying to accommodate four sets of retrievable hard disk drives in a juxtaposed manner in the 1U server cabinet has practical problem. As only one inch of space will be spared after four hard disk drives are housed in the server cabinet (17 in−4 in×4 in=1 in=2.54 cm), and to install the retrieval mechanism in an one inch space is very difficult.  
           [0004]    The technology innovation in recent years has created new techniques that allow four sets of retrieval hard disk drives housed in a 1U server. In order to facilitate partition assembly and add slide rails, the partition is formed in a “I” shape. Such a design cannot be fitted into a cabinet inner space of 17 inches. Hence total cabinet width has to be increased to compensate the additional inner space required. Such a change affects the width of slide rails installed on two sides of the server cabinet, and the commonly used standard 10 mm steel ball slide rail cannot be used. As a result, special slide rails have to be made. It increases the cost and is not well accepted by consumers.  
         SUMMARY OF THE INVENTION  
         [0005]    The primary object of the invention is resolve aforesaid disadvantages. The invention mainly utilizes an U-shaped partition to replace conventional I-shaped partition to reduce the width of single side. The casing has bent latch elements formed by punching to match latch slots formed on the partition to give the partition structure desired strength. The partitioned retrieval space contains a retrieval cradle which has single side board to save space. By means of the techniques provided by the invention, the server of 1U 19 inches specifications can house four retrievable hard disk drives of standard 3.5 inches in a juxtaposed manner.  
           [0006]    Another object of the invention is to reduce the interval of two adjacent retrieval spaces through improved partition assembly method and retrieval cradle design so that the server of 1U specifications that has the inner width of 17 inches can concurrently accommodate four sets of retrievable hard disk drives.  
           [0007]    A further object of the invention is to use partitions to divide four housing chambers for hard disk drives to contain retrieval cradles that are used to hold the retrievable hard disk drives, thereby the server inner space of 1U specifications can be fully utilized, and standard 10 mm steel ball slide rails can be used and installed on two sides of the server without the need of specially made slide rails.  
           [0008]    Yet another object of the invention is to save the width of the retrieval slide rails for the hard disk drives and to reduce the height of the casing, and to include an additional partition on the hard disk for mounting super thin floppy disk drives and optical disk drives adopted to portable computers on the partition thereby to allow the server to equip full function.  
           [0009]    The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.  
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0010]    [0010]FIGS. 1A through 1E are perspective views of the invention.  
         [0011]    [0011]FIGS. 2A and 2B are schematic views of a retrieval cradle under operation.  
         [0012]    [0012]FIGS. 3A and 3B are schematic views of a handle and brake elastic strip in use.  
         [0013]    [0013]FIG. 4 is a schematic view of the invention in use. 
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0014]    Referring to FIGS. 1A through 1E, the server according to the invention contains four sets of hard disk drives  6  laid in a juxtaposed manner. The server is conformed to 1U 19 inches specifications. And the hard disk drives  6  are retrievable from the server. The server has a casing  1  which includes a main partition  2 , a bottom board  11  and three sets of secondary partitions  3  located between the main partition  2  and bottom board  11  to divide the casing in four retrieval spaces  12  for housing four sets of hard disk drives  6 . Each retrieval space  12  contains a retrieval cradle  4  for holding a hard disk drive  6 . The retrieval cradle  4  mainly includes a displacement board  41  and an anchor rack  42  located at the front end of the displacement board  41 . On the anchor rack  42 , there is a handle  43  to facilitate retrieving of the retrieval cradle  4 . The retrieval cradle  4  further has a side board  44  formed by bending on one side of the displacement board  41 . The displacement board  41  and side board  44  have respectively a plurality of fasten apertures  412  and  443  for fastening the hard disk drive  6 . By means of the structure set forth above, four sets of standard 3.5 inches hard disk drives  6  may be housed in the 1U 19 inches server and may be retrieved individually and conveniently through the retrieval cradle  4 .  
         [0015]    During fabrication, in order to take into account of the strength of the secondary partitions  3  and space layout, the secondary partitions  3  are formed by punching a metal plate of 1 mm thickness. Each finished secondary partition  3  has a bent bottom end and a top end to respectively form a first anchor section  31  and a second anchor section  32  to fasten to the bottom board  11  and main partition  2 . The second anchor section  32  further has a free end bent to form a reinforced section  323 . The first anchor section  31  and second anchor section  32  also have respectively a first latch slot  311  and a second latch slot  321 . The bottom board  11  and main partition  2  also have respectively a first latch element  111  and a second latch element  21  formed by punching to engage respectively with the first latch slot  311  and the second latch slot  321 . Such a construction can greatly reduce the width of the secondary partitions  3 . In addition, the top side of the secondary partition  3  and the main partition  2  have respectively first fasten aperture  22  and second fasten apertures  322  to engage with fasten elements  8  for anchoring the secondary partition  3 . The bottom board  11  of the casing  1  further has a stopping ridge  112  corresponding to the rear end of the secondary partition  3  to confine the secondary partition  3  at a selected location.  
         [0016]    The anchor rack  42  of the retrieval cradle  4  has a jutting strut  431  to pivotally engage with the handle  43 . There is a brake elastic strip  5  located between one side of the anchor rack  42  and the front end of the secondary partition  3  to form a braking relationship therebetween. To achieve this purpose, the brake elastic strip  5  includes a jutting section  51 , a depressing section  52  formed at a front free end thereof, a latch bore  53  and an anchor section  54 . At the front end of one side of the anchor rack  42 , there is an opening  421  for the brake elastic strip  5  to pass through, and a latch lug  422  and an anchor bore  423  to engage respectively with the latch bore  53  and anchor section  54  such that the brake elastic strip  5  may be directly riveted to the anchor rack  42 . The front end of the secondary partition  3  further has a retain section  33  to harness the jutting section  51 . The depressing section  52  is extended outside the opening  421  for relieving the brake relationship whenever desired.  
         [0017]    The bent reinforced section  323  at the top end of the secondary partition  3  is adjacent to the side board  44  of the retrieval cradle  4  to increase structural strength so that the width of the partition and total width of the server can be reduced. The displacement board  41  and anchor rack  42  further have respectively a plurality of heat radiation openings  413  and  425  to facilitate air ventilation for dispersing heat generated by the hard disk drives  6  during operation. The anchor rack  42  and side board  44  adjacent to the casing  1  also have respectively a plurality of conductive strips  424 ,  442  formed by punching for linking to the server cabinet to avoid static charge.  
         [0018]    Referring to FIGS. 2A and 2B, when in use, the retrieval cradle  4  may be removed from the server, then hard disk drive  6  may be mounted and fastened to the retrieval cradle  4  by engaging screws through the fasten apertures  412  and  443  formed on the displacement board  41  and side board  44  with screw holes  61 .  61 ′ located on the side wall and bottom wall of the hard disk drive  6 . Then through the handle  43 , the retrieval cradle  4  may be pushed into the retrieval chamber  12  bordered by the main partition  2  and secondary partitions  3 . When the retrieval cradle  4  is completely housed in the casing  1 , the jutting section  51  of the brake elastic strip  5  will be latched in the retain section  33  located at the front end of the secondary partition  3  to prevent the retrieval cradle  4  from sliding out. Referring to FIGS. 3A and 3B, when the retrieval cradle  4  is housed in the casing  1 , the handle  43  may be dropped downwards beside the depressing section  52  of the brake elastic strip  5  so that the depressing section  52  cannot be moved sidewards to release the braking thereby can prevent the retrieval cradle  4  from moving out incidentally. When there is a need to replace the hard disk drive  6 , users may lift the handle  43  with a hand and to depress the depressing section  52  with a thumb to disengage the jutting section  51  from the retain section  33 , then pull the handle  43  to move the retrieval cradle  4  away from the retrieval chamber  12  for replacing the hard disk drive  6 .  
         [0019]    Referring to FIG. 4, four sets of hard disk drives  6  may be housed in a standard 1U casing in a juxtaposed manner. Hence the standard 1U server with a width of 17 inches may have standard 10 mm steel ball slide rails installed on two sides of the server without the need of using smaller and specially made slide rails. And consumers do not need to purchase additional facilities.  
         [0020]    Furthermore, the retrieval chambers  12  formed by the main partition  2  and secondary partitions  3  in the server not only can house four sets of retrieval hard disk drives  6 , they can also make better utilization of the height such as mounting super thin floppy disk drives and optical disk drives (not shown in the drawings) on the main partition  2  for portable computers to achieve full function.