Abstract: A sleeve of control device is provided for controlling a cursor motion of an electronic device. A touch-feel enhancing mechanism is formed on an outer surface of the sleeve. The touch-feel enhancing mechanism is not related to the function of operating the control device to detect the rotating action or the moving action by the user. The touch-feel enhancing mechanism is only used to enhance comfort and touch feel of operating the control device.

Abstract: A control device includes a supporting surface, a sensing member, a displacement generation member, and a movable member. The supporting surface is extended along a first longitudinal direction. The displacement generation member faces the sensing member. The movable member is extended along a second longitudinal direction, and linearly translatable along the first longitudinal direction of the supporting surface. When the second longitudinal direction of the movable member is parallel with the first longitudinal direction and the movable member is linearly translated along the first longitudinal direction or rolled along a direction perpendicular to the first longitudinal direction, a displacement of the movable member relative to the supporting surface synchronously results in a displacement of the displacement generation member relative to the sensing member. Moreover, a first control signal is generated in response to an interaction between the displacement generation member and the sensing member.

Abstract: A sleeve of control device is provided for controlling a cursor motion of an electronic device. A touch-feel enhancing mechanism is formed on an outer surface of the sleeve. The touch-feel enhancing mechanism is not related to the function of operating the control device to detect the rotating action or the moving action by the user. The touch-feel enhancing mechanism is only used to enhance comfort and touch feel of operating the control device.