Importance

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Abstract

A shock absorbing apparatus comprises a cylinder body having a cylinder chamber formed therein, a piston body reciprocatively held in the cylinder chamber and having a pair of piston rods outwardly projecting through hole portions respectively formed at the two end portions of the cylinder chamber, and a shock absorber for absorbing motion when one of the piston rods projects over one of the hole portions and the leading portion of the other piston rod is stopped in the other hole portion, so that a shock generated at the time of collision with an object is absorbed. In addition, a drive unit for rotating a rotational member around a base comprises a shaft body secured to the base and having an engaging portion on the outer surface thereof, a rotational member journalled rotatively around the shaft body, an operation chamber provided for the rotational member, and a reciprocating member reciprocatively held in the lengthwise direction of the operation chamber and having a portion engaged to the engaging portion. A shock absorbing apparatus is adapted to the reciprocating member so as to absorb the shock generated at the portion at which the rotational member stops its rotational motion.

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First Claim