Abstract:
A persona computer add-on card stabilizer comprising a transverse rod in the rear portion inside a computer case and above the add-on card slot, a plurality of mounting rings on the transverse rod to prevent the corresponding add-on cards from popping up.

Description:
BACKGROUND OF THE INVENTION 
     I. Field of the Invention 
     This invention relates generally to a personal computer add-on card stabilizer and, more specifically, a personal computer add-on card stabilizer that utilizes a transverse rod and a plurality of mounting rings to prevent the peripheral add-on cards inside a personal computer from moving and popping up. 
     II. Description of the Prior Art 
     Heretofore, personal computer has expansion slots for different add-on cards with different applications. VL is an earlier specification while ISA (Industry Standard Architecture) and PCI (Peripheral Connection Interface) specifications are used today. A peripheral add-on card is plugged in an expansion slot of the mainboard and fixed by means that a mounting plate is screwed on the case. 
     However, the expansion slot is relatively long. When an add-on card is plugged in the expansion slot and fixed on the case with only a screw, the add-on cards tend to pop up during transportation and the front portion of add-on cards might move up to cause a bad contact or disconnection, thereby resulting in malfunction of this personal computer. If it happens to a display card at power up time, no display to indicate any signal will confuse the users. 
     The present invention improves on the heretofore known problem by providing a personal computer add-on card stabilizer. The personal computer add-on card stabilizer is composed of a transverse rod with a plurality of mounting rings on the transverse rod to prevent the corresponding add-on cards from popping up. 
     SUMMARY OF THE INVENTION 
     It is therefore a primary object of the invention to provide a personal computer add-on card stabilizer comprising a transverse rod in the rear portion inside a computer case and above the add-on card slot, and a plurality of mounting rings on the transverse rod to prevent the corresponding add-on cards from moving and popping up. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The accomplishment of the above-mentioned object of the present invention will become apparent from the following description and its accompanying drawings which disclose illustrative an embodiment of the present invention, and are as follows: 
     FIG. 1 is a perspective view of the present invention; 
     FIG. 2 is an exploded view of an embodiment of the present invention; 
     FIG. 3 is a sectional view of the transverse rod of the present invention; and 
     FIG. 4 is a sectional view of the mounting ring of the present invention. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to FIG.  1  and FIG. 2 the present invention is composed of a transverse rod  4 , which is located inside of a computer case  1  and above expansion slots  3  of a mainboard  2 . The transverse rod  4  is fitted with zigzag notches  41  on the outer circumference thereof, as shown in FIG. 3. A plurality of mounting rings  5  wrap around the transverse rod  4 . Zigzag notches  51  on the inner circumference of the mounting ring  5  correspond to the zigzag notches  41  of the transverse rod  4  for fixing the mounting rings  5  on transverse rod  4 . Referring to FIG. 4, the mounting ring  5  has an opening  52 , and an upper edge  53  and a fastening arm  54  is situated on the top and bottom of the opening  52 . A small slot  541  is located at the end of the fastening arm  54 . the top of add-on card  3  can be inserted into the small sot  541 . A screw  6  passes through the upper edge  53  and the fastening arm  54  to fasten the mounting ring  5  firmly on transverse rod  4 . The fastening arm  54  is on the top of the add-on card  3  and presses it firmly from moving and popping up. 
     Based on above description, the transverse rod  4  is installed on the rear of computer case  1  and above the expansion slots  21  of the mainboard  2 . The mounting ring  5  wraps around the transverse rod  4  by pulling the opening  52  wider. The mounting ring  5  is moved to top of an add-on card  3 , press the fastening arm  54  to the add-on card  3  and inlay the small slot  541  to the top of add-on card  3 . Pass the screw  6  over the upper edge  53  to the fastening arm  54  to fasten the mounting ring  5  on the transverse rod  4 . Accordingly, the add-on card  3  can be fixed for prevention from bad contact or disconnection by transportation vibration. 
     The fastening arm  54  of mounting ring  5  can be adjusted up and down to adapt to the different height of the different add-on cards  3 . 
     The mounting ring  5  is in zigzag connection with the transverse rod  4  so that the mounting ring  5  can not move up and down but to the right and left for reaching the connect position for the add-on cards  3 . 
     Once a new add-on card is placed a mounting ring  5  can be added respectively, this offers flexibility and convenience. 
     Referring to FIG  1 , a pair of mounting brackets  11  is welded on the computer case  1  where the transverse rod  4  is mounted. On both ends of transverse rod  4  are a pair of flat apertures  42 . A connection plate  7  can be inserted into the flat aperture  42  of the transverse rod  4  while a screw  8  passes through the connection plate  7  and the mounting bracket  11  to the transverse rod  4  for a firm fixing on computer case  1 . 
     While a preferred embodiment of the invention has been shown and described in detail, it will be readily understood and appreciated that numerous omissions, changes and additions may be made without departing from the spirit and scope of the invention.