CPU module mounting rack

A CPU module mounting rack comprising a bottom rail mounted on a mother board at the top to hold a CPU connector on said mother board, two holder frames mounted on said mother board at the top and holding said bottom rail therebetween, two upright rails respectively connected to said holder frames and adapted to hold a CPU module in a vertical position in connection with said CPU connector, two locating frames respectively mounted on said mother board at the bottom, and two pairs of locking plates respectively mounted on said holder frames and fastened to said locating frames to secure said holder frames, said mother board and said locating frames together, wherein:

• said holder frames comprise each a substantially U-shaped middle block, and two mounting blocks integral with said U-shaped middle block at two opposite sides, said U-shaped middle block comprising two coupling holes respectively disposed at two opposite upright side walls thereof, and a hooked portion raised from a back side thereof, said coupling holes being respectively formed of two vertically spaced circular holes and a narrow opening connected between said circular holes, said mounting blocks comprising each a horizontal sliding track which receives said locking plates respectively, a vertical through hole at the center, a longitudinal slot horizontally disposed at an outer side in communication with said horizontal sliding track, and a notch at a back side thereof;
• said locating frames comprise each a substantially U-shaped base plate, two circular blocks raised from said U-shaped base plate at one side near two opposite ends thereof and fitted into respective through holes on said mother board, and two locating bolts respectively raised from said circular blocks and inserted into the vertical through holes on the mounting blocks of said holder frames, said locating bolts comprising each a neck;
• said locking plates are respectively inserted into the sliding tracks on the mounting blocks of said holder frames and moved between a locking position and an unlocking position, said locking plates comprising each a key hole at the center which receives the locating bolts of said locating frames respectively, said key hole comprised of a circular hole and an oblong hole extended from the circular hole, the circular hole of said key hole being aligned with vertical through hole on one mounting block when the respective locking plate is moved to the unlocking position, the oblong hole of said key hole being forced into engagement with the neck of the corresponding locating bolt on one locating frame when the respective locking plate is moved to the locking position, a finger strip raised from one end thereof for the holding of the fingers, a raised bevel block raised from an opposite end thereof which is forced into engagement with the notch on the corresponding mounting block when the respective locking plate is moved to the locking position, and a plurality of beveled projecting portions at one lateral side forced into engagement with the longitudinal slot on the corresponding mounting block;
• said upright rails comprise each two coupling blocks bilaterally disposed at one end, two pivot pins respectively raised from said coupling blocks at an inner side and respectively coupled to the coupling holes on the middle blocks of said holder frames, and a pair of downwardly extended, hooked springy strips respectively forced into engagement with the hooked portions on the middle blocks of said holder frames.