Patent ID: 6859985

Claim:
A blade attaching structure of a wiper unit, comprising: an attaching groove formed on a wiper arm; and a connecting shaft provided on a blade for wiping a window surface, the connecting shaft detachably and rotatably supported by the attaching groove, wherein: the attaching groove is provided with a groove inner portion having a larger diameter than the connecting shaft and a groove entrance portion having a width narrower than the groove inner portion, postures of the attaching groove and the connecting shaft are changed between a connected posture where the connecting shaft is prevented from coming off from the groove entrance portion, and attaching and detaching postures where the connecting shaft can freely enter or exit from the groove entrance portion, and the connecting shaft is supported on the blade attaching structure to be slidable in a rotational direction of the shaft, the connecting shaft having a larger diameter portion and a smaller diameter portion smaller than the larger diameter portion due to a chamfered portion created on the outer circumference of the connecting shaft, and changing postures is accomplished by operating an adjusting member integrally formed on a connecting shaft end portion to make the connecting shaft slide in the rotational direction of the shaft.