Patent ID: 7100326

Claim:
A drive device for opening and closing a slide body, the drive device comprising: I) a first cable having a primary cable end portion adapted for connection to said slide body and a second cable end portion opposite to the primary cable end portion of the first cable, the first cable having a cable length; II) a second cable having a primary cable end portion adapted for connection to the slide body and a second cable end portion opposite to the primary cable end portion of the second cable, the second cable having a cable length; and III) a drum mating with the second cable end portion of the first cable and mating with the second cable end portion of the second cable, the drum being adapted to rotate in a first rotational direction for winding in one of the first cable and the second cable while winding out the other of the first cable and the second cable, thus opening the slide body, the drum being adapted to rotate in a second rotational direction opposite to the first rotational direction for winding in the other of the first cable and the second cable while winding out the one of the first cable and the second cable, thus closing the slide body, the drum comprising; i) a main drum mating with the second cable end portion of the first cable and being rotatable, the main drum having an inner face and an outer face, and ii) a sub-drum mating with the second cable end portion of the second cable and being rotatable substantially coaxially with the main drum around a shaft, the sub-drum having an inner face and an outer face, an inner gear being formed with radially extended teeth on the inner face of one of the main drum and the sub-drum, an outer gear being formed with radially extended teeth on the outer face of the other of the main drum and the sub-drum, the inner gear meshing with the outer gear for adjusting the cable length of the first cable and the cable length of the second cable, wherein the main drum has an outer periphery formed with a winding portion for winding the first cable and the second cable, the main drum is formed with a first cutout portion for leading the second cable end portion of the second cable to the winding portion, and the sub-drum is formed with a second cutout portion for leading the second cable end portion of the second cable to the winding portion.