Abstract: A disc cartridge comprises a rotary member (25) that is held on first and second shutters in a disc storage unit in which a disc is stored with a first surface externally exposed from a disc opening and that is engaged with the first and second shutters so that the first and second shutters are opened and closed as the disc rotates within the disk storage unit, wherein the rotary member has a disc receiving portion comprising a contact area (25n) that comes into contact with the periphery of a second surface of the disc and receives the disc when the first and second shutters are closed state and a groove (25p) provided outside the contact area.

Abstract: The disc cartridge of the present invention includes a cartridge body 11, 12, shutters 21, 22, disc holding portions and a stopper member 23. The cartridge body has a disc window 12w and a bottom 11u and stores a disc 100 in a rotatable state with one side exposed through the disc window. A bottom window 11c, 11h is opened through the bottom so as to get the disc chucked and to allow a head to access it. The shutters 21, 22 open or shut the bottom window 11c, 11h. A rotational member 25 is supported by the cartridge body 11, 12 to be rotatable and interlocked with the shutters 21, 22 so as to open and close the shutters 21, 22 by rotating. The disc holding portions 21d, 22c, 22d interlock with the shutters 21, 22 opening or closing to hold or release the disc 100. The stopper member 23 is supported by the cartridge body to take a position protruding into the disc window 12w or a non-protruding position.

Abstract: A disc cleaner includes: a supporting body 11 including a first holding plane 12a, a disc supporting plane 13 and a convex portion 14, where the first holding plane 12a holds a first type of disc cartridge, which exposes one side of a disc therein and which includes a rotational member for opening and closing shutters, such that the exposed side of the disc faces the first holding plane 12a, the disc supporting plane 13 is located higher than the first holding plane 12a and contacts with a non-storage region of the disc around its center hole, thereby supporting the disc thereon, and the convex portion 14 fits into the center hole of the disc so as to stick out of the center hole; a shutter driving member 31 for turning the rotational member of the first type of disc cartridge; and a rotary knob 21 including a contact plane that contacts with the non-storage region of the disc around its center hole and a concave portion that fits the convex portion so as to turn against the convex portion.

Abstract: A disc cartridge includes: a disc storage portion; first and second shutters provided on the bottom of the disc storage portion; and a rotational member interlocked with the shutters and having a disc supporting portion to support the disc thereon while the shutters are closed and a notch to be located inside a head opening while the shutters are opened. The shutters include disc holders for holding the disc thereon with the center of the disc offset from that of the disc storage portion such that an outer side surface of the disc contacts with the sidewall of the disc storage portion at a position where the notch is located while the shutters are closed. The inner circumference of a region, where the disc supporting portion contacts with the second side of the disc, defines a circle that has its center offset from the center of the disc storage portion.

Abstract: A disc cartridge includes: a cartridge body including a disc storage portion storing a disc, having first and second sides, therein so that the disc is rotatable there and that the first side is exposed and chucking and head opening formed on the bottom of the storage portion so as to get the disc chucked externally and allow a read/write head to access the second side, respectively; a shutter supported, and movable with respect to the cartridge body, between the second side of the disc and the bottom of the disc storage portion so as to expose or cover the chucking and head openings and defining a hole under a center hole of the disc while the shutter is closed; and a disc holder provided for the shutter and pressing the disc against the shutter and holding it thereon while the chucking and head openings are covered with the shutter.

Abstract: A disc cartridge includes a cartridge body, a first shutter, a second shutter, and a rotational member. The cartridge body includes a disc storage portion, a chucking opening and a head opening. The disc storage portion has a disc window and a bottom and stores a disc, having first and second sides, therein so that the disc is rotatable in the disc storage portion and that the disc exposes the first side inside the disc window. The first and second shutters are provided on the bottom of the disc storage portion to expose or cover the head opening. The rotational member is provided over the first and second shutters inside the disc storage portion and is engaged with the first and second shutters in such a manner as to open or close the first and second shutters when rotates inside the disc storage portion.

Abstract: A disc cartridge includes a cartridge body having a disc storage portion, a chucking opening and a head opening. The disc storage portion has a disc window and a bottom and stores a disc, having first and second sides, therein so that the disc is rotatable in the disc storage portion and that the first side of the disc is exposed. The chucking opening is formed on the bottom of the disc storage portion so as to get the disc chucked externally. The head opening is also formed on the bottom of the disc storage portion so as to allow a head, which reads and/or writes a signal from/on the second side of the disc, to access the second side of the disc. A shutter is supported to, and movable with respect to, the cartridge body so as to expose or cover at least the head opening.

Abstract: The disc cartridge of the present invention includes a cartridge body 11, 12, shutters 21, 22, disc holding portions and a stopper member 23. The cartridge body has a disc window 12w and a bottom 11u and stores a disc 100 in a rotatable state with one side exposed through the disc window. A bottom window 11c, 11h is opened through the bottom so as to get the disc chucked and to allow a head to access it. The shutters 21, 22 open or shut the bottom window 11c, 11h. A rotational member 25 is supported by the cartridge body 11, 12 to be rotatable and interlocked with the shutters 21, 22 so as to open and close the shutters 21, 22 by rotating. The disc holding portions 21d, 22c, 22d interlock with the shutters 21, 22 opening or closing to hold or release the disc 100. The stopper member 23 is supported by the cartridge body to take a position protruding into the disc window 12w or a non-protruding position.

Abstract: A disc cartridge according to the present invention includes a cartridge body and a shutter. The cartridge body includes a disc storage portion, a chucking opening and a head opening. The disc storage portion has a disc window and a bottom and stores a disc, having first and second sides, therein so that the disc is rotatable in the disc storage portion and that the first side of the disc is exposed. The shutter is supported to, and movable with respect to, the cartridge body so as to expose or cover at least the head opening.

Abstract: A disc cartridge includes a cartridge body, first and second shutters, and a rotational member. The cartridge body includes a disc storage portion to store a disc in a rotatable state, a chucking hole provided on the bottom of the disc storage portion so as to get the disc chucked externally, and a head access window provided on the bottom of the disc storage portion so as to allow a head, which reads and/or writes data from/on the disc, to access the disc. The first and second shutters are provided so as to expose or cover the head access window by rotating in the disc storage portion. The rotational member is provided so as to rotate in the disc storage portion, too. The first and second shutters are interlocked with the rotational member so as to rotate in mutually opposite directions and at respectively different velocities.

Abstract: A disc cartridge includes: a cartridge body including a disc storage portion storing a disc, having first and second sides, therein so that the disc is rotatable there and that the first side is exposed and chucking and head opening formed on the bottom of the storage portion so as to get the disc chucked externally and allow a read/write head to access the second side, respectively; a shutter supported, and movable with respect to the cartridge body, between the second side of the disc and the bottom of the disc storage portion so as to expose or cover the chucking and head openings and defining a hole under a center hole of the disc while the shutter is closed; and a disc holder provided for the shutter and pressing the disc against the shutter and holding it thereon while the chucking and head openings are covered with the shutter.

Abstract: A disc cartridge comprises a rotary member (25) that is held on first and second shutters in a disc storage unit in which a disc is stored with a first surface externally exposed from a disc opening and that is engaged with the first and second shutters so that the first and second shutters are opened and closed as the disc rotates within the disk storage unit, wherein the rotary member has a disc receiving portion comprising a contact area (25n) that comes into contact with the periphery of a second surface of the disc and receives the disc when the first and second shutters are closed state and a groove (25p) provided outside the contact area.

Abstract: A disc cartridge includes: a cartridge body including a disc storage portion storing a disc, having first and second sides, therein so that the disc is rotatable there and that the first side is exposed and chucking and head opening formed on the bottom of the storage portion so as to get the disc chucked externally and allow a read/write head to access the second side, respectively; a shutter supported, and movable with respect to the cartridge body, between the second side of the disc and the bottom of the disc storage portion so as to expose or cover the chucking and head openings and defining a hole under a center hole of the disc while the shutter is closed; and a disc holder provided for the shutter and pressing the disc against the shutter and holding it thereon while the chucking and head openings are covered with the shutter.

Abstract: A disc cartridge the present invention includes a cartridge body and first and second shutters. The cartridge body includes a disc storage portion, a chucking opening and a head opening. The disc storage portion has a disc window and a bottom and stores a disc, having first and second sides, therein so that the disc is rotatable in the disc storage portion and that the first side of the disc is exposed inside the disc window. The chucking opening is formed on the bottom of the disc storage portion so as to get the disc chucked externally. The head opening is also formed on the bottom of the disc storage portion so as to allow a head, which reads and/or writes a signal from/on the second side of the disc, to access the second side of the disc. The first and second shutters are provided between the second side of the disc and the bottom of the disc storage portion. The first shutter rotates around the center of the chucking opening.

Abstract: A disc cartridge according to the present invention includes a cartridge body and a shutter. The cartridge body includes a disc storage portion, a chucking opening and a head opening. The disc storage portion stores a disc, having first and second sides, therein so that the disc is rotatable in the disc storage portion. The shutter is supported to, and movable with respect to, the cartridge body between the disc and the bottom of the disc storage portion so as to expose or cover the chucking opening and the head opening. The shutter also includes a convex portion that is provided for the shutter so as to protrude into a center hole of the disc while the shutter covers the chucking opening and the head opening. When the shutter is going to be opened, the convex portion lifts the disc in a thickness direction of the cartridge while contacting with the second side of the disc.

Abstract: A disc cartridge includes: a disc storage portion; first and second shutters provided on the bottom of the disc storage portion; and a rotational member interlocked with the shutters and having a disc supporting portion to support the disc thereon while the shutters are closed and a notch to be located inside a head opening while the shutters are opened. The shutters include disc holders for holding the disc thereon with the center of the disc offset from that of the disc storage portion such that an outer side surface of the disc contacts with the sidewall of the disc storage portion at a position where the notch is located while the shutters are closed. The inner circumference of a region, where the disc supporting portion contacts with the second side of the disc, defines a circle that has its center offset from the center of the disc storage portion.

Abstract: A disc cartridge includes a cartridge body having a disc storage portion, a chucking opening and a head opening. The disc storage portion has a disc window and a bottom and stores a disc, having first and second sides, therein so that the disc is rotatable in the disc storage portion and that the first side of the disc is exposed. The chucking opening is formed on the bottom of the disc storage portion so as to get the disc chucked externally. The head opening is also formed on the bottom of the disc storage portion so as to allow a head, which reads and/or writes a signal from/on the second side of the disc, to access the second side of the disc. A shutter is supported to, and movable with respect to, the cartridge body so as to expose or cover at least the head opening.

Abstract: A disc cartridge includes: a disc storage portion; first and second shutters provided on the bottom of the disc storage portion; and a rotational member interlocked with the shutters and having a disc supporting portion to support the disc thereon while the shutters are closed and a notch to be located inside a head opening while the shutters are opened. The shutters include disc holders for holding the disc thereon with the center of the disc offset from that of the disc storage portion such that an outer side surface of the disc contacts with the sidewall of the disc storage portion at a position where the notch is located while the shutters are closed. The inner circumference of a region, where the disc supporting portion contacts with the second side of the disc, defines a circle that has its center offset from the center of the disc storage portion.

Abstract: A disc cartridge includes: a cartridge body including a disc storage portion storing a disc, having first and second sides, therein so that the disc is rotatable there and that the first side is exposed and chucking and head opening formed on the bottom of the storage portion so as to get the disc chucked externally and allow a read/write head to access the second side, respectively; a shutter supported, and movable with respect to the cartridge body, between the second side of the disc and the bottom of the disc storage portion so as to expose or cover the chucking and head openings and defining a hole under a center hole of the disc while the shutter is closed; and a disc holder provided for the shutter and pressing the disc against the shutter and holding it thereon while the chucking and head openings are covered with the shutter.

Abstract: A disc cartridge includes: a disc storage portion; first and second shutters provided on the bottom of the disc storage portion; and a rotational member interlocked with the shutters and having a disc supporting portion to support the disc thereon while the shutters are closed and a notch to be located inside a head opening while the shutters are opened. The shutters include disc holders for holding the disc thereon with the center of the disc offset from that of the disc storage portion such that an outer side surface of the disc contacts with the sidewall of the disc storage portion at a position where the notch is located while the shutters are closed. The inner circumference of a region, where the disc supporting portion contacts with the second side of the disc, defines a circle that has its center offset from the center of the disc storage portion.