A control device includes a holder, a sleeve, a detecting module, and a positioning mechanism. The holder defines an accommodation chamber. The sleeve is sleeved onto the holder, wherein the sleeve is rotatable and movable on the holder. The detecting module is accommodated within the accommodation chamber for detecting a rotation and a translational movement of the sleeve. The positioning mechanism includes a positioning part and a transmission member. The positioning part is located at a side of the holder. The transmission member is connected with the holder and disposed on the positioning part. When the holder generates a first vertical displacement relative to the positioning part, the transmission member generates a second vertical displacement relative to the positioning part synchronously in response to the first vertical displacement of the holder.