Patent ID: 7391410

Claim:
A movement input device for use on a touch screen of a portable electronic device comprising: a fastening unit configured to secure the movement input device on the portable electronic device and having a top and bottom side, said fastening unit also being placed over and spaced above at least part of the touch screen, to form a gap between the fastening unit and at least part of the touch screen; and a user input unit fastened to and extending through the fastening unit, wherein the user input unit comprises: a user actuation part protruding from the top side of the fastening unit and being operable for actuation by a user for free angular movement with an angle of rotation around an axis (X) provided at least generally perpendicular to the top and bottom sides of the fastening unit; and a touch screen contact part protruding from the bottom side of the fastening unit that is configured to contact the touch screen in a position where at least an angle of the contact position in relation to the axis corresponds to the angle of the user actuation part in relation to the axis, so that movement of the user input unit is detected on the touch screen.