Hair clipper

#The present invention relates to a hair clipper having a blade block and, more particularly, to a technique of reliably retaining, in a blade base, a pressing spring applying a pressing load to a movable blade against a fixed blade.

#Conventionally, in this kind of hair clipper blade block, a pressing spring which serves to press a movable blade against a fixed blade is normally held in a blade base by fitting bosses provided inside the blade base to boss-holes formed at end portions of the pressing spring and then upsetting or deforming exposed free ends of the boss by cold or hot working. There is also known an alternative method of press fitting a pressing spring to groove portions provided in a blade base (see, e.g., Japanese Patent Laid-open Application No. 10-235036).

#In case the pressing spring is fixed by upsetting the bosses as in the prior art, the pressing spring may be retained in a floating state (i.e., the boss holes of the pressing spring may be movable along the axial directions of the bosses) due to processing errors generated by the upsetting process. Further, the reaction force of the pressing spring acts on the deformed bosses all the time. Therefore, if the hair clipper is exposed to elevated temperatures while being circulated in the market or while being used, the deformed bosses may undergo creep deformation and thus the pressing spring may often suffers from floating. This holds true in case of the prior art example in which the pressing spring is press fitted to the groove portions provided in the blade base.

#The objects and features of the present invention will become apparent from the following description of embodiments given in conjunction with the accompanying drawings, in which:

#FIG. 1 is a cross sectional side view showing a blade block of a hair clipper in accordance with a first embodiment of the present invention;

#FIGS. 2A and 2B are views for explaining the movement of a comb shaped blade edge portion of a fixed blade when the blade block is in use;

#Hereinafter, the present invention will be described with reference to the accompanying drawings which form a part hereof.

#Referring to FIG. 3, a hair clipper 1 of the present invention includes a main body block 10 having a contour of a grip shape and a blade block 9 attached to a top portion of the main body block 10.

#The main body block 10 includes a housing 11, a motor 12 accommodated in the housing 11 and a battery 40 accommodated in the housing 11 for supplying electric power to the motor 12. A power transmitting mechanism 14 for transmitting drive force from the motor 12 to a movable blade 3 is connected to a shaft of the motor 12. A portion of the surface of the main body block 10 forms a grip having a switch 13. By manipulating the switch 13 to be on, the electric power from the battery 40 is supplied to the motor 12 which in turn imparts reciprocating movement to the movable blade 3 through the power transmitting mechanism 14, thereby cutting hairs.