Abstract: In a recording tape cartridge, at a reel which is accommodated within a case, a magnetic tape is wound around an outer peripheral portion of a reel hub, and a reel gear is provided coaxially and annularly at an end surface of the reel hub. An annular convex portion projects coaxially from the end surface of the reel hub. An end surface of the annular convex portion is a reference surface which is orthogonal to an axis of the reel. When the magnetic tape is used, the reference surface abuts a positioning surface of a drive device, the reel is positioned in an axial direction, and the reel rises up within the case. The reel rotates around the axis due to driving force of a driving gear which meshes with the reel gear.

Abstract: The magnetic tape cassette has a base with an opening for forming a transparent window and a transparent resin-made window member to be installed in said opening. The window member is provided with an engaging unit which is to be fitted into the base at an angle and the base is provided with an engaging portion that is formed at an angle in correspondence to the engaging unit and the window member is installed in the opening by being fitted in at an angle.

Abstract: A recording tape cartridge has: a case which is substantially rectangular and which rotatably accommodates a single reel on which a recording tape is wound; an opening for pulling-out of the recording tape, the opening being formed in a wall surface of the case at a side of loading into a drive device other than at a corner portion of the case; a leader block fixed to an end portion of the recording tape, and pulled-out by a pull-out member of the drive device, and able to close the opening; and a position restricting portion disposing the leader block at an inner side of the wall surface and parallel to the wall surface.

Abstract: 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.

Abstract: In a recording tape cartridge, an opening is formed at a corner portion between wall portions which are at a front and a side with respect to a direction of loading, into a drive device, a substantially rectangular case accommodating a reel on which a recording tape is wound. The opening is inclined with respect to the direction of loading. A leader member attached to an end portion of the recording tape is pulled-out from the opening. A door, which is formed in an arc-shape and opens and closes the opening, is disposed at the opening so as to be slidable along a predetermined, arc-shaped guide groove. A width of the groove is formed so as to narrow along a direction in which the door closes the opening. Opening and closing operations of the door are thereby stabilized.

Abstract: A recording tape cartridge in which melting, abrasion or the like does not occur at a portion of abutting of a brake member with a release member, or with a release portion of a drive device, during rotation of a reel. In this recording tape cartridge, a magnetic tape is wound onto the reel at a reel hub inside a case. A brake member is non-rotatably provided inside the case. The reel is rotation-locked when the brake member is disposed at a rotation-locking position, at which the brake member engages with an engaging protrusion of a bottom portion. A release pad is disposed between the bottom portion and the brake member and abuts against both thereof. When the release pad holds the brake member at a rotation-enabling position, the reel is rotatable.

Abstract: The present invention provides a recording tape cartridge having: a case which accommodates a single reel, on which a recording tape is wound, such that the reel is rotatable; an opening formed by cutting off a portion of a front wall of the case which front wall faces a drive device at a time when the recording tape cartridge is loaded into the drive device, the opening being for pulling-out of a leader member which is attached to an end portion of the recording tape; and a door formed in a substantial arc shape as seen in plan view, and moving along a predetermined circumference, and opening and closing the opening.

Abstract: The present invention aims to prevent damages of a magnetic tape in a magnetic tape cassette adapted to be operated in a recording and reproducing apparatus which can similarly operate a plurality of magnetic tape cassettes. More specifically, in the invention, differences (A1?B1, A2?B2) between heights A1, A2 of radially inner portions (32a), (42a) of lower flanges (32), (42) and heights B1, B2 of ribs (35a), (45a) of lower halves (35), (45) for restricting a height of the magnetic tape are equal (A1?B1=A2?B2) in a plurality of the magnetic tape cassettes which have the same vertical sizes and different sizes in a horizontal direction.

Abstract: A recording tape cartridge has a case which is substantially rectangular, and which rotatably accommodates a single reel on which a recording tape is wound; an opening formed at a corner portion of the case at a side of loading the case into a drive device, the opening being for pulling-out of a leader member attached to an end portion of the recording tape; and a shielding member sliding so as to open and close the opening. A dustproofing wall, which overlaps with a distal end of the shielding member when the shielding member closes the opening, is formed at a peripheral edge of the opening.

Abstract: A case for a recording tape cartridge is formed by joining an upper case and a lower case via mutual peripheral walls. A blocking piece, which is disposed to extend along the peripheral wall of the upper case serving as a cover, is inserted into a recess, which is disposed in the lower case serving as a base and opens upward and sideward, and a portion of the recess is blocked off by the blocking piece, whereby an engagement hole is formed that is positioned lower than a parting line (PL) and opens only sideward. According to the invention, it is possible to form a recess that opens only toward the outer surface of the peripheral wall of the base of the case, without disposing undercuts in the base.

Abstract: The present invention provides A recording tape cartridge including: a rectangular case having, at a corner portion, an opening for pulling-out of one end of a recording tape, and accommodating the recording tape; a cover member opening and closing the opening; and an opening opening/closing mechanism holding the cover member at the case, and selectively moving the cover member between a position of opening the opening and a position of closing the opening.

Abstract: The present invention provides a leader tape, method for manufacturing the same, and a magnetic tape cartridge with a leader tape having surface properties and conductive properties for securing slide durability suitable for a magnetic tape drive using a magnetic tape cartridge of one reel cartridge. A leader tape joined to a starting end of a magnetic tape wound around a magnetic tape reel of a one reel cartridge, comprising: a base material; and a conductive slide layer formed on at least one surface of the base material, the surface of the conductive slide layer having a surface electrical resistance value of 102 ?/square to 1010 ?/square and a surface roughness Ra of 0.5 ?m to 1.5 ?m.

Abstract: A recording tape cartridge which is not subject to concern about a leader block disengaging, even when a case is subjected to an impact due to dropping or the like. The recording tape cartridge is provided with the case, an aperture for drawing out a recording tape, and a leader block. The case rotatably accommodates a single reel, on which the recording tape is wound. The aperture is formed in a peripheral wall of the case. The leader block is fixed to an end portion of the recording tape, is drawn out by drawing-out means of a drive device, and is capable of closing the aperture. At this recording tape cartridge, a cover member, which covers at least a portion of the leader block that is closing the aperture, is provided to be slideable along the peripheral wall.

Abstract: A recording tape cartridge for enabling size reduction of a drive device. A substantially rectangular case rotatably accommodates a single reel on which a recording tape is wound. An opening, for drawing out a leader member attached to an end portion of the tape, is formed by cutting away a corner portion of the case at a side of loading into a drive device. A covering member, which is formed to be substantially circular arc-shaped in plan view, moves on a predetermined circular circumference at a side wall portion which is parallel with a drive device loading direction, to open and close the opening. An operation portion protrudes from the covering member and is operated by an opening member provided at the drive device. The operation member moves at one side of the position of a movement path of the covering member that is closest to the side wall in plan view, the one side being bounded by this position.

Abstract: The recording tape cartridge includes a case body formed by joining together an upper half and a lower half and a tape reel around which a recording tape is wound. The cartridge further includes a lid covering a front side of the case body, and a reel lock member which has a braking claw to be engaged with an engagement tooth provided on a flange of the tape reel and which is adapted to slide with rotation of the lid. Ribs nip the reel lock member so as to perform positional regulation, and a sliding reel lock member urging device urges the reel lock member so as to engage the braking claw with the engagement tooth. A reel lock releasing member urges the reel lock member with rotation of the lid so as to release the engagement.

Abstract: A recording medium cartridge that is housed in a library, extracted from the library by a gripping mechanism, and loaded into a drive device includes a case, within which is housed a recording medium, and a memory, in which is stored information relating to the recording medium and that is noncontactingly accessible by reading and writing devices disposed at the drive device and at the gripping mechanism. A communication surface of the memory is disposed within the case at an angle at which the memory is accessible from at least three directions.

Abstract: A recording tape cartridge in which it is possible to suppress radial direction movement of a reel by a braking member which impedes rotation of the reel at a time when the recording tape cartridge is not being used, while ensuring strength of a reel hub with respect to pressure of winding of a recording tape therearound. At the recording tape cartridge, the reel, around which a magnetic tape is wound and which is accommodated in a case, is set in a rotation locked state when a braking member, which cannot rotate due to the braking member engaging with a cross-shaped rib, engages with anchor projections. When the braking member moves apart from the anchor projections, a meshed state is cancelled, and the reel can rotate with respect to the case. A reinforcing ring, which is fit together with an inner peripheral surface of the reel hub, reinforces the reel hub whose top end is open.

Abstract: A magnetic disk cartridge for use in a disk drive having both a slot and a guide portion. The magnetic disk cartridge comprises a generally disk-shaped housing in which a magnetic disk is rotatably housed, and protrusions. The protrusions are formed on the main surface of the housing and are used for positioning the magnetic disk cartridge in a direction capable of recording and reproduction in cooperation with the guide portion of the disk drive when the magnetic disk cartridge is loaded in the disk drive.

Abstract: A magnetic tape cassette storage case (1) comprising a storage section (3) for storing a magnetic tape cassette (81), a lid section (5) for covering the storage section (3), and a connecting section (7) for connecting the storage section (3) and the lid section (5) so as to enable the open-and-closed motion; in which the storage section (3) and the lid section (5) comprise plate portion (11, 21) and sidewall portions (13, 23) provided along the outer peripheries of the flat portions (11, 21) respectively. A notch (26b) having at least the height of the sidewall portion (13) provided on the storage section (3) is formed on the inner side of the end of the sidewall portion (23) closer to the connecting section (7) of the lid section (5).

Abstract: Structure of a lower case that reinforces a recording tape cartridge. At an inner side of the lower case, an annular projecting portion is provided along and at an inner side of a reel area rib that demarcates a reel area, raising stiffness of the case. At a periphery of a hole for positioning, which is formed in an outer face of the lower case, a recessed surface, which provides a height direction reference surface, is formed. At the inner side of the lower case, a boss is formed in correspondence to the hole for positioning. The boss is located along an outer face of the reel area rib. A thickness-enhancing portion is formed at the periphery of a base portion of the boss. Thus, thickness at the reference surface, that is, the recessed surface, is substantially the same as thickness at portions therearound.