Abstract: A cartridge 2 receiving a photosensitive recording disc 4 therein including: a cartridge body 11 having inner openings 18 and 19 exposing part of the recording disc 4 to the outside; a light-shield plate 12 attached to the outside of the cartridge body 11 and having outer openings 14 and 15 which face the inner openings 18 and 19; and a shutter 13 opening/closing the inner openings 18 and 19 and the outer openings 14 and 15 between the cartridge body 11 and the light-shield plate 12; wherein recesses 25e and 26e for inserting end edges 12d of the outer circumference of the light-shield plate 12 are provided in light-shield plate attachment surfaces 25a and 26a of the cartridge body 11 so that when the end edges 12d are inserted into the recesses 25e and 26e and attached to the cartridge body 11, a labyrinth-shaped light-shielding structure is formed.

Abstract: A disk cartridge housing in which a disk compartment is formed by combining an upper shell and a lower shell. The cartridge has an opening portion which overlaps with a shutter member to expose a part of the disk compartment. A convex rib and a concave groove arrangement is used between the opening portion and shutter member to form a dust-proof housing.

Abstract: In a disc cartridge for an optical disc and the like, to increase stiffness in an opening for a record and reproduction mechanism. A disc cartridge 10 has an upper shell 12, a center frame 14, and a lower shell 16 clamped to one another. A center frame opening 20 and a lower shell opening 22 expose a recording surface of a recording medium contained between the center frame 14 and the upper shell 12 downwardly, and a reinforcing member 24 integrally couples the ends of the center frame opening 20, and a lower shell reinforcing member 26 integrally couples the ends of the lower shell opening 22.

Abstract: A disc cartridge accommodating an optical disc in a cartridge body. The disc cartridge includes a cartridge body formed by mating and joining upper and lower halves mated together. A plurality of fusing portions for mating and fusing the upper and lower halves are provided at positions corresponding to recess portions for accommodating an optical disc. Each fusing portion is provided with a mating projection formed at one of the upper and lower halves and a mating projection formed at the other of the upper and lower halves. A plurality of mating projections formed at either half comprise mating projections having projections for fusing annularly and continuously formed over the entire circumference of the end surfaces to be mated to the mating projections of the other half and mating projections having projections for fusing formed in the form of an arc in one part of the end surfaces.

Abstract: A disc cartridge accommodating an optical disc in a cartridge body. The disc cartridge includes a cartridge body formed by mating and joining upper and lower halves mated together. A plurality of fusing portions for mating and fusing the upper and lower halves are provided at positions corresponding to recess portions for accommodating an optical disc. Each fusing portion is provided with a mating projection formed at one of the upper and lower halves and a mating projection formed at the other of the upper and lower halves. A plurality of mating projections formed at either half comprise mating projections having projections for fusing annularly and continuously formed over the entire circumference of the end surfaces to be mated to the mating projections of the other half and mating projections having projections for fusing formed in the form of an arc in one part of the end surfaces.

Abstract: A disc cartridge accommodating an optical disc in a cartridge body. This disc cartridge is provided with a cartridge body formed by mating and joining a pair of upper and lower halves formed at the circumferential edges with rising circumferential walls which are mated to each other to constitute the circumferential side walls and, at the same time, formed at facing inner surfaces with walls for forming the accommodating portion which are mated to each other to constitute the disc accommodating portion in which the optical disc is accommodated. This cartridge body is provided with openings for recording and reproduction and a shutter member for opening and closing these openings. On the two sides of the cartridge body on the lower half from the front side toward the middle toward the back side are provided recess portions for preventing erroneous loading. A plurality of fusing portions for mating and fusing the upper and lower halves are provided at positions corresponding to these recess portions.

Abstract: In a disc cartridge for an optical disc and the like, to increase stiffness in an opening for a record and reproduction mechanism. A disc cartridge 10 has an upper shell 12, a center frame 14, and a lower shell 16 clamped to one another. A center frame opening 20 and a lower shell opening 22 expose a recording surface of a recording medium contained between the center frame 14 and the upper shell 12 downwardly, and a reinforcing member 24 integrally couples the ends of the center frame opening 20, and a lower shell reinforcing member 26 integrally couples the ends of the lower shell opening 22.