Hard disc drive mounting structure
BACKGROUND OF THE INVENTION 
     The present invention relates to computer hard disc drive mounting structures, and more particularly to a computer hard disc drive mounting structure in which the hard disc drive is fastened inside a sliding case which can be fastened in a receiving chamber made in the computer mainframe of a computer through plug-in connection. 
     In regular personal computers, a hard disc drive, if it is required, is generally fixedly fastened inside the mainframe of a computer, i.e. a hard disc drive is provided for use in a specific computer. It is therefore an object of the present invention to provide a detachable hard disc drive mounting structure permitting a hard disc drive to be conveniently removed from one computer for use in another. 
     To achieve this object, there is provided a detachable hard disc drive mounting structure, in which the hard disc drive is fastened inside a sliding case by screws, which sliding case which can be conveniently releasably fastened in a receiving chamber made on the mainframe of a computer through plug-in connection. By matching the slide ways on the two opposite sides of the sliding case with the side rails inside the receiving chamber at two opposite sides, the sliding case can be drawn out of the receiving chamber and then pushed back into place. Input/output pins are made on the hard disc drive at one end conveniently for connecting to the mother board of the computer mainframe through an input/output bus line terminal connector. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view of the assembled device of this invention. 
     FIG. 2 is an exploded view of the device of this invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to the annexed drawings in greater detail, a detachable hard disc drive mounting structure is generally comprised of a sliding case 1, a hard disc drive 2 and a computer mainframe 3. 
     The sliding case 1 is a substantially closed cabinet in shape suitable for holding the hard disc drive 2, having an opening 11 at one end through which the hard disc drive can be inserted inside the sliding case 1, a stub tenon 13 at the front edge 12 thereof, a groove 131 between said front edge 12 and said stub tenon 13, a plurality of bolt holes 14 and 15 on the top edge thereof, and two slide ways 16 at the two opposite sides thereof. 
     The hard disc drive 2 has a plurality of bolt holes 21 and 21 at the top edge thereof and at locations corresponding to the bolt holes 14 and 15, and input/output pins 23 at the front end thereof. 
     The computer mainframe 3 has a hard disc receiving chamber 31, a pair of rails 32 in said receiving chamber 31 at two opposite sides, a retaining slot 33 in said receiving chamber 31 at the inner end, a terminal connector 34 connected to a mother board (not shown, which controls the operation of the computer mainframe 3) through input/output bus line 341. 
     To assemble the present invention is quite simple and outlined hereinafter. Insert the hard disc drive 2 inside the sliding case 1 through the opening 11 and use screws 141 and 151 to respectively fasten in the bolt holes 14 and 21 or 15 and 22 so as to fixedly secure the hard disc drive 2 inside the sliding case 1. Then, connect the input/output pins 23 in the terminal connector 34 of the input/output bus line 341. The sliding case 1 and the hard disc drive 2 are then inserted in the receiving chamber 31 permitting the two rails 32 to respectively engage in the two slide ways 16. As soon as the sliding case 1 is inserted in the receiving chamber 31 to the limit, the stub tenon 13 becomes firmly engaged in the retaining slot 33. Thus, the mounting process is made. When pulling force is applied to the sliding case 1, the stub tenon 13 can be easily disengaged from the retaining slot 33, and therefore, the sliding case 1 and the hard disc drive 2 can be conveniently removed from the computer mainframe 3. After the sliding case 1 and the hard disc drive 2 are removed out of the computer mainframe 3, the input/output pins 23 are disconnected from the terminal connector 34 of the input/output bus line 341.