Personal portable life-saving device

A personal portable life-saving device for helping a user to drop from a high building at a gradual and adjustable speed during fire accidents, said life-saving device comprising a housing that is a rectangular enclosed structure having an interior accommodating a reel set and a braking unit, a chest strap for tying about the user's chest being disposed at an upper end of the housing and a hips strap for tying about the user's hips being disposed at a lower end of the housing, said reel set comprising a main reel and two auxiliary rollers, said main reel having an annular strap groove, said auxiliary rollers being alternately arranged above said main rollers, said main rollers and said auxiliary each having a brake lining on both side of their respective sides;

• a metal strap wound round said main reel end received in said strap groove, said metal strap being passed round said auxiliary rollers to be pulled out from the upper end of said housing, said metal strap being provided with a rope and a snap ring at its upper end;
• and said braking unit comprising a first single braking plate at one side of said main reel and said auxiliary rollers within said housing, and a second single braking plate on the other side of said main reel and auxiliary rollers, a control disk being disposed externally of one of said braking plate, said control disk having a screw rod at its center for engaging a screw hole in said housing such that said control disk may be turned so that said screw rod thereof presses against or release said one of said braking plates.