Pointer device for scrolling control of computer screen

摘要

The pointer device (20) has a joystick (32) arranged vertically in an aperture (26) of a casing (24), having lower end (36) in contact with vertical sensor (28), and upper end rising through the aperture. The joystick is horizontally movable within a predetermined angle. Movement of the joystick triggers a horizontal sensor (30), downward movement triggers vertical sensor. The pointer device (20) includes a base-plate (22), a casing (24) arranged on the base-plate, a vertical sensor (28) arranged underneath an aperture (26) of the casing, and several horizontal sensors (30) arranged next to the vertical sensor. A joystick (32) is arranged vertically within the aperture of the casing, having a lower end (36) in contact with the vertical sensor, and an upper end rising through the aperture of the casing. The joystick is horizontally movable within a predetermined angle in reference to the lower end. A horizontal movement of the joystick triggers one of the horizontal sensors, while a downward movement triggers the vertical sensor. A control arrangement (60) is connected electrically with the vertical and horizontal sensors for detecting the vertical or horizontal movements, and for producing corresponding signals.