Computer mainframe that convenient teaching was used

The utility model discloses a computer mainframe that convenient teaching was used, the power distribution box comprises a box body, be provided with first backup pad in the box, the upper surface joint of first backup pad has four first sliding sleeves, and all is provided with first slide bar in four first sliding sleeves, and the top of four first slide bars all is connected with the lower fixed surface of second backup pad, and just four first slide bars are located the four corners department of second backup pad lower surface respectively. This computer mainframe that convenient teachingwas used is through setting up ratch, first gear, first motor, second backup pad, second gear, third gear, second motor, second slide bar, spring and third fixed plate to can make the teacher take and move the mainframe box and rotate, thereby reduce teacher's work load of in -process of giving lessons, thereby improve the quality of instruction, can make that the student is better to be understood the mainframe box simu