Patent ID: 7241068

Claim:
A coupling structure, comprising: a shaft body including a slip-off preventing groove; a shaft joint including: an engagement groove with which the shaft body is engaged; a shaft joint body with two bores facing the engagement groove; and a locking body press-fined into one of the bores; and a coupling shaft for coupling the shaft body and the shaft joint by being inserted into the bores and slip-off preventing groove and locked with the locking body, the shaft joint further including: a regulating tongue far regulating movement of the shaft body; a plate body press fitted between the locking body and the shaft joint by the locking body and having a flexible member for guiding a positioning recess of the shaft body into the shaft joint, a curved portion, and a supported portion; and the supported portion extending from the curved portion of the plate body, superposed between a surface of the locking body and a surface of the shaft joint body, and having a projection incised into at least one of the shaft joint and locking body, wherein at least one of the shaft joint body and the locking body has a recessed portion into which the projection is fitted.