Patent attributes
A joystick device including a hollow housing having an endless boundary structure and a ceiling structure with an opening; a control-stick having a head portion and a stem portion, the hollow housing surrounding the stem portion with the head portion outside the hollow housing; and a plurality of biasing curved arm members extending outwardly from the stem portion and movable with the control-stick as a whole relative to the hollow housing along a plane at least substantially perpendicular to the stem portion. Each of the plurality of biasing curved arm members having a curved segment with a convex side directed towards a respective corresponding portion of the endless boundary structure so as to bias the stem portion when the control-stick is being moved towards said portion. The plurality of biasing curved arm members being distributed around the stem portion so as to cooperate with each other to centre the control-stick.
