Patent ID: 7001200

Claim:
A control adapter device for attaching to a control unit having an input control part, the control adapter device comprising: a connector for electrically connecting the control adapter device to the control unit; a transmission unit for transmitting, by wireless transmission, a signal input that it input from the input control part; an engagement mechanism for engaging the control unit; and a case main body for positioning the engagement mechanism at least on one of the left side and the right side of the connector and the transmission unit; wherein the engagement mechanism includes a rotatably moveable engagement member for engaging a wall of the control unit; wherein the rotatably moveable engagement member includes a groove portion; wherein one end of the rotatably moveable engagement member has a press-maneuver part for receiving a pressing force; wherein the groove portion is situated on a line of action along which the pressing force of the press-maneuver part is directed; wherein the case main body includes a stopper which the groove portion contacts when the rotatably moveable engagement member is rotated in a disengaging direction by the pressing force of the press-maneuver part.