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US 7,032,233 B2Granted
Cartridge housing a recording medium and drive device for recording medium
AssigneeFuji Photo Film Co., Ltd.
InventorsKengo Oishi, Kazuo Hiraguchi
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AssigneeFuji Photo Film Co., Ltd.
InventorsKengo Oishi, Kazuo Hiraguchi
Estimating the term…
A disk cartridge has a write protect portion for switching between a write-allowed state and a write-inhibited state. The write protect portion is equipped with two prisms having reflection faces different in reflectivity which are rotatably supported therein. In a drive device in which the disk cartridge is loaded, an amount of light, which is irradiated to the write protect portion and then reaches a photodetecting portion of the drive device, is varied by rotating a shaft. On the basis of the amount of the light reaching the photodetecting portion, the drive device judges whether the disk cartridge is in a write-inhibited state. According to the disk cartridge, dust-proof performance is not lost, and occurrence of mis-detection due to deformation of the disk cartridge can be prevented.
A drive device for receiving a recording medium cartridge, wherein the cartridge includes a capacity indicating portion disposed thereon which denotes a storage capacity of the cartridge, the drive device comprising:
A system for reading and writing information to and from a recording medium, the system comprising:
Dependencies are inferred from the claim text.