Apparatus for mainframe having redundant extractable devices

An apparatus for a mainframe having redundant extractable power supplies, the mainframe including a mounting space having respective openings, comprising:

• a main body having at least two receiving spaces with respective openings at one end;
• closing ends of the two receiving spaces being arranged with a circuit board;
• two extractable units arranged within the receiving spaces and connected to the circuit board, said extractable units being power supplies;
• the main body having fixedly mounted thereon a front frame and a rear frame, the front frame and the rear frame being adjacent to the two receiving spaces;
• each of the front frame and rear frame having a bottom plate,
• the front frame having a plurality of through holes and screw holes for being installed with a panel;
• the panel being arranged with a radiating fan, a power input port, a display lamp set, a restoring switch and a handle arranged to enable the main body to be pulled from the mounting space through one of said respective openings;
• and
• the rear frame having a panel which is formed with a plurality of through holes and a screw hole and is installed with a plurality of radiating fans;
• wherein the main body is extractable, by means of said handle, from the mounting space in the mainframe, and wherein the two extractable units are extractable from the main body through the two openings so as to be disconnected from the circuit board after the main body has been extracted from the mounting space of the mainframe.