Patent ID: 8028418

Claim:
A hair cutting device comprising: a head portion, an outer blade formed with a plurality of blade holes, an inner blade that slidably contacts an inner surface of the outer blade, and a motor which drives the inner blade, wherein the head portion is connected to an upper portion of a main body grip portion having a controller such that the head portion can laterally tilt and vertically move, the head portion is resiliently biased upward, wherein an upper end of the main body grip portion is formed with an opened space into which a lower portion of the head portion is inserted, wherein both front and back surfaces of the head portion have a pair of left and right shaft-bushing portions provided by an annular member, which are connected to an inner surface of the opened space of the main body grip portion such that the left and right shaft-bushing portions can laterally rotate relative to the main body grip portion, vertically move relative to the main body grip portion, and slidably contact the inner surface of the opened space, wherein a contact portion which is provided lower than the pair of left and right shaft-bushing portions and slidably contacts the inner surface of the opened space, wherein the annular member is mounted on an outer surface of the lower portion of the head portion, wherein the pair of left and right shaft-bushing portions respectively provided on both front and back surfaces of the annular member are supported by a bearing formed on the inner surface of the opened space of the main body grip portion such that the left and right shaft-bushing portions can laterally rotate and vertically move, and wherein spring receivers are respectively provided on left and right ends of the annular member to receive push-up springs which resiliently bias the head portion upward.