Patent ID: 7031102

Claim:
A driving apparatus for loading/unloading a pair of pole-base assemblies which are reciprocated along a guide rail formed on a main deck to move a magnetic tape to contact with a head drum, comprising: a first and a second link members, each connected with one end to one pole-base assembly; a first and a second loading gears, each connected to the other ends of the first and the second link members, the first and the second loading gears being engaged with each other to be driven in association with each other, the first loading gear comprising a first gear part engaged with the second loading gear, and a second gear part stepped with respect to the first gear part, the second gear part having a large gear groove formed at both ends, the large gear groove being formed to be relatively deeper than other neighboring gear grooves; and a main gear which is rotated by power received from a driving motor mounted on the main deck, the main gear being selectively engaged with the first loading gear at the second gear part upon rotation thereof, wherein the main gear is rotated in association with one of the loading gears within a desired rotation range upon rotation so as to transfer power to load/unload the pole-base assembly, and the large gear grooves formed at both ends of the second gear part are a starting point for engagement with the main gear in the rotational direction of the main gear.