Patent ID: 7314415

Claim:
A coupling member for coupling a driven body with a driving body to transmit driving force of the driving body to the driven body and cutting off the power transmission when a load for driving the driven body exceeds a given value, the coupling member comprising: a pair of sidepiece portions disposed parallel to each other; a pair of bent portions having free ends, basic ends joined integrally to first ends of the sidepiece portions respectively and sandwich portions supporting a first pin mounted on one of the driving body and the driven body by sandwiching, wherein each sandwich portion comprises: two or more projections disposed at regular intervals from one another in a circumferential direction of the first pin and contacted with an outside circumferential surface of the first pin; and one or more surfaces each disposed between the adjacent projections and opposed to the outside circumferential surface of the first pin at a regular distance; and a curved portion having both ends joined integrally to second ends of the sidepiece portions respectively and a hole through and into which a second pin mounted on one of the driving body and the driven body is passed and fitted, wherein the first pin is sandwiched between the sandwich portions by inserting the first pin into a spacing between the sidepiece portions and then pressing the first pin toward the bent portion side to deform the bent portions in a direction away from each other, and wherein the first pin is released from the sandwich portions in a direction of the free end side of the bent portion when the load applied to the first pin exceeds the given value.