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AssigneeSony Corporation
InventorsTakaaki Sanpei, Shuichi Kikuchi, Kazuo Sasaki, Mitsue Sakurai, Hitomi Chiba
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A tape reel in which molding quality of a flange unit is improved so as to improve reliability at the time when a magnetic tape runs at high speed, and a tape cartridge having the same. A plurality of reference planes (152v) formed between a chucking gear (152b) and an outer peripheral rib (152r2) formed at an outer peripheral side of this chucking gear (152b) are provided separately from the outer peripheral rib (152r2). And the reference plane (152v) is formed with edge planes of each of a first rib (152v1) extending toward a circumference and a second rib (152v2) extending toward a direction crossing the first rib (152v1). According to this arrangement, a volume at a portion constituting the reference plane (152v) is made smaller, occurrence of a sink after a resin is hardened is suppressed, and molding quality of the flange unit (152) is improved so that straight runnability of the magnetic tape at high speed running and reliability in recording/reproducing operation are improved.
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:
Dependencies are inferred from the claim text.