Fully pulled-out type mobile apparatus

A fully pull-out type mobile apparatus, comprising:

• an extractable device having two opposing lateral sides, each lateral side having an abrupt edge, each abrupt edge having at least two guideposts extending downward from, a bottom thereof;
• two relay levers, each of the relay levers having an elongated groove, each of the at least two guideposts on each lateral side being slidably connected within the elongated groove of one of the two relay levers, each elongated groove having a cylindrical hole at opposing ends thereof;
• a plurality of cushions, each cushion having a post, one post being inserted into each of the cylindrical holes of each elongated groove;
• two guide rails, each of the guide rails providing an outer rail part, an inner rail part and a ball structure between the outer and the inner rail parts, the ball structure having a length at least as one as a distance between the at least two guideposts located on each side of the extractable device, and the inner rails of the guide rails connecting with the relay levers respectively so as to move with each other;
• such that when the extractable device is being pulled out, the guideposts move along the elongated grooves until a respective outermost one of the guideposts contacts outer ends of the elongated grooves and the inner rails and relay lever move along the outer rails, the inner and outer rails oppositely sandwiching the respective ball structure to enable the extractable device to be pulled out completely.