Hand-Operating Starting Device With Clutch Structure

A hand-operating starting device with clutch structure, mountable to one side of an engine, comprising:

• a driving portion, which comprises a housing defining a receiving section, the receiving section receiving therein a rotary member around which a pull cord is windable, the pull cord having an end extending outside the housing, the pull cord having an opposite end fixed to the rotary member, the rotary member comprising an elastic member mounted to one end thereof to provide a restoration force for reverse rotation of the rotary member after the rotary member has been rotated, the rotary member being coupled to an axle, the axle having a surface from which a positioning pin projects;
• and
• a driven portion, which comprises a cover, the cover being set to cover the receiving section of the housing, a sleeve that comprises a fixation pin and a helical channel formed thereon being received in the cover in such a way that the sleeve is movably fit over the axle and the positioning pin is received in and guided by the helical channel, whereby the sleeve is rotatable and is movable, during the rotation thereof, to a position where the fixation pin is in driving engagement with the engine,
• characterized in that
• the sleeve has a circumferential surface in which a plurality of positioning grooves is formed and circumferentially distributed, the cover comprising a spring arranged in a radial passage so that the spring biases a positioning ball to set the positioning ball in an elastically biased condition to selectively fit into and engage the positioning grooves;
• a bearing is arranged between coupling surfaces of the driving portion and the driven portion to be rotatably coupled with the axle so as to serve as a supporting axis for rotation, the bearing comprising an O-ring fit over an outer circumference thereof, wherein the cover comprises a lining mounted to an inside surface thereof, the lining comprising a step section formed on an inner circumference thereof, the step section comprising a circumferential groove formed in an inner surface thereof, the O-ring being fit into and embedded in the circumferential groove, the bearing being fit to the step section to thereby achieve an effect of sealing;
• and
• the engine comprises a main shaft that comprises an eccentric peg projecting therefrom and having an outer end on which a slope surface is formed, the slope surface inclining in a rotation direction (clockwise) of the main shaft.