Abstract: A dual-shaft driving module includes two shafts and a synchronizing block sandwiched between the two shafts. The two shafts are substantially parallel to each other and are substantially in a mirror symmetrical arrangement. Each shaft has two spiral grooves recessed on an outer surface thereof, and each spiral groove has a spiral angle within a range of 40 degrees to 60 degrees. The synchronizing block includes two concave surfaces arranged on two opposite sides thereof and four driving portions respectively protruding from the two concave surfaces. The two concave surfaces respectively face the two shafts, and each concave surface accommodates a part of the corresponding shaft. The four driving portions are respectively inserted into the four spiral grooves. When one of the two shafts is spun to transmit a force to the synchronizing block, the synchronizing block rotates the other shaft at the same time by the force.

Abstract: A dual-shaft driving module includes two shafts and a synchronizing block sandwiched between the two shafts. The two shafts are substantially parallel to each other and are substantially in a mirror symmetrical arrangement. Each shaft has two spiral grooves recessed on an outer surface thereof, and each spiral groove has a spiral angle within a range of 40 degrees to 60 degrees. The synchronizing block includes two concave surfaces arranged on two opposite sides thereof and four driving portions respectively protruding from the two concave surfaces. The two concave surfaces respectively face the two shafts, and each concave surface accommodates a part of the corresponding shaft. The four driving portions are respectively inserted into the four spiral grooves. When one of the two shafts is spun to transmit a force to the synchronizing block, the synchronizing block rotates the other shaft at the same time by the force.