Disposable box cutter

A disposable box cutter comprising:

• (a) a main body provided with an interior receiving compartment, a retaining member, and two longitudinal ends with least one longitudinal end provided with a through port in communication with said receiving compartment, said main body provided on one side with a slot extending along the longitudinal direction of said main body;
• (b) a guide member movably disposed in said main body such that said guide member moves along the longitudinal direction of said main body to extend out of said through port of said main body, said guide member provided at one end with a blade attachment means and a push knob corresponding in location to said slot of said main body;
• (c) a blade attached to said guide member by said blade attachment means so that a first end of the blade and a second end of the blade are concealed in said main body at the time when said guide member is not extended out of said main body, and that said first end of said blade is extended out of said main body at the time when said guide member is extended out of said main body;
• (d) an elastic member disposed in said main body such that one end of said elastic member is retained by said end retaining member, and that other end of said elastic member is retained by said guide member, the elastic member provides the guide member with a recovery force enabling the guide member to return to its original position when released.