Patent ID: 7234242

Claim:
An adjustable apparatus for a hair clipper, comprising: a blade assembly joined to a front end of an electric hair cutter housing, and having a stationary blade seat with a stationary blade at a front end thereof and an upper blade assembly; wherein, the upper blade assembly has an upper blade seat with an upper blade at a front end thereof and a spring housing having a locating spring secured at an interior thereof; and the upper blade assembly is joined to an upper surface of the stationary blade to locate the upper blade seat of the upper blade assembly at a front end of the stationary blade seat, and the spring housing is located at a rear end of the stationary blade seat; a spring blade having one end thereof butted against and fixed to the spring housing, and the other end thereof butted against a rear end of the stationary blade; a pushing block having a fastening block extended from a rear end thereof, and joined to the rear end of the stationary blade seat to butt against the spring housing for allowing movements thereof at the stationary blade seat; and a hollow rotary wheel having a hollow locating pillar, which is provided with an adjustment region having a step-like adjustment portion at an interior thereof; wherein, the rotary wheel is joined to a front end of the electric hair cutter housing to have an edge of the rotary wheel protrude from the electric hair cutter housing while allowing the rotary wheel to be turned; the fastening block of the pushing block is accommodated in the adjustment region of the rotary wheel and is lodged into the step-like adjustment portion, such that the rotary wheel is enabled to rotate within the adjustment portion; by lodging into steps of different levels of the step-like adjustment portion, the pushing block is moved forward or backward; when the pushing block is moved forward, the upper blade assembly is propelled forward to produce a restoring force from compression of the spring blade; and when the pushing block is moved backward, the upper blade assembly is moved backward by the restoring force of the spring blade.