Adjustable shoulder strap system for back pack, has primary and secondary adjustable belts of which primary belt is associated with upper and lower belt loops that enable change of course of primary belt

摘要

The device has primary and secondary adjustable belts (1,2) that serve as a component of a main shoulder strap and an attached belt that buckles waist of a user. The primary elastic belt assures a joint between shoulder belt (3) and the low corners (4) of a back pack. The primary belts are associated with upper and lower belt loops that enable to change the course of the primary belt as a function of certain solicitation.