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.