Patent ID: 7118061

Claim:
A tape reel having a pair of flange units guiding a tape from both sides thereof, provided with a chucking gear formed at a center of an under surface thereof in a ring-shape, which engages with a gear unit formed at a top end of a rotary shaft provided in a tape drive device, said tape reel is characterized by comprising: an annular outer peripheral rib formed at an outer peripheral side of said chucking gear and engages with a circular opening formed on an under surface of a housing accommodating said tape reel to be freely rotatable; and a plurality of reference planes each of which is formed between said chucking gear and said outer peripheral rib and supported by a reel support unit on a side of said rotary shaft, wherein said reference plane is provided separately from said outer peripheral rib, and wherein each of said plurality of reference planes is formed with each end surface of a first rib extending toward a circumference of said tape reel and a second rib extending in a direction crossing with said first rib.