Abstract: In a recording tape cartridge, a reel locking member, which is positioned at a rotation locking position meshes with an engaging gear which is in a form of internal teeth and which is at a reel, such that rotation of the reel with respect to a case is impeded. When a clutch member is pushed up, a rotating cam member, which is screwed together with the clutch member, rotates toward one side, and the reel locking member moves to a releasing position by a positive motion cam structured by a cam projection and a cam groove. When the clutch member is pushed downward, the rotating cam member rotates toward another side, and the reel locking member moves to the rotation locking position by the positive motion cam.

Abstract: A recording tape cartridge (10) includes: a case (12) that houses a reel (40) onto which a recording tape is wound, the case comprising an upper case (14) including a top plate (14A) and a lower case (16) including a bottom plate (16A); lock members (90) that are disposed, so as to be slidable in a radial direction of the reel, in an attachment portion (60) formed on an inner surface of the top plate, the lock members being movable between a rise/fall lock position, at which the lock members are intervened between an upper surface of the reel and the top plate to prevent movement in an axial direction of the reel, and a rise/fall allowance position, at which the lock members are retracted from between the upper surface of the reel and the top plate to allow movement in the axial direction of the reel; and projecting portions (70A) that are formed on the inner surface of the top plate and project towards the lock members so that the lock members do not fall out of the attachment portion at least when the case

Abstract: In a recording tape cartridge, an inclined opening obtained by notching a corner portion on the side of loading to a drive apparatus is closed when a door is in a close position in which the door is inclined from a direction matching the loading direction and is open when the door is in an open position along a right side wall. The door is guided by first and second guide grooves and moves between the close position and the open position while changing its orientation by a urging force of a compression coil spring disposed along the right side wall or a moving force transmitted from an operation projection which comes into engagement with the engagement member of the drive apparatus.

Abstract: In a recording tape cartridge, a compression coil spring urges a reel downward via a brake member. Due to the biasing force of the spring, a gear of the brake member securely meshes with a gear inside a reel hub preventing the reel's inadvertent rotation. The biasing force urges lock members outward in a radial direction from the center of a mount or the reel. Engagement portions of the lock members engage with an upper edge of the hub. The outer side surfaces of the engagement portions press against the inner peripheral surface of the hub, and ends of the engagement portions at a further outer side than the body portions intervene between the upper surface of an upper flange and the inner surface of a top plate to prevent rotation of the reel and to control movement of the reel in either a radial or an axial direction.

Abstract: A recording tape cartridge including at least a door opening and closing an opening by rotating around a supporting shaft provided at a front wall side; an allowing portion formed in the door, which allows avoidance of contact between the door and a distal end surface of a leader tape when the door closes the opening; and a guide portion formed at the allowing portion, and abutting the distal end portion of the leader tape, and formed to be thick-walled in a direction of making the distal end portion of the leader tape move away from the side wall. When the door closes the opening of the recording tape cartridge, a predetermined clearance is ensured between the distal end surface of the leader tape and a deepest surface of the allowing portion.

Abstract: A recording tape cartridge has a case rotatably accommodating a single reel on which a recording tape is wound, an opening formed in portions of a front surface and a side surface adjacent to a corner portion of the case, and a door opening and closing the opening by rotating. The opening is for pulling-out of a leader member attached to an end portion of the recording tape. The door is structured so as to be able to cover the corner portion of the case including a portion of a top surface and/or a bottom surface when the door closes the opening.

Abstract: Sliding resistance at a time when a locking member is moved between a locking position and an unlocking position with respect to a reel can be lessened, and it is possible to avoid bringing about trouble with a drive device or the like. In a recording tape cartridge 10, in which a reel 20, which has a hub 22 on which a recording tape T is wound, is singly and rotatably accommodated within a case 12, a locking member 70 is configured to be able to rotate within a plane orthogonal to a rotation axis direction of the reel 20 around a position which is different from a rotational center of the reel 20.

Abstract: Sliding resistance at a time when a locking member is moved between a locking position and an unlocking position with respect to a reel can bc lessened, and deformation of a flange welded to a hub also can be suppressed. In a recording tape cartridge 10 in which a reel 20, at which an upper flange 24 is welded to a hub 22, is singly and rotatably accommodated within a case 12, a locking member 70 is configured to be able to rotate within a plane orthogonal to a rotation axis direction of the reel 20 around a position which is different from a rotational center of the reel 20.

Abstract: A recording tape cartridge having: a case which accommodates a reel for a recording tape; an opening formed at a corner portion of the case; and a door which has a bent portion formed in a substantial L-shape in plan view, and opens and closes the opening, wherein the plate thickness of the bent portion in a direction in which the door rotates is larger than that of the door, and a stepped portion is formed at the further end side from the bent portion of the door, wherein also the case includes a first abutting portion which abuts the door when it is closed, and second abutting portions which abut the end surface of the bent portion at a door distal-end side thereof, and the inner surface of the bent portion, when the closed door is further deflected in a direction of closing the opening.

Abstract: A tape cartridge includes a case, which is made of a lower case and an upper case, for accommodating a reel wound with a magnetic tape. The lower case includes a bottom surface disposed with two positioning holes formed separately from each other on a straight line orthogonal to a direction in which the tape cartridge is loaded into a drive device. The lower case also includes a front wall disposed with two surfaces for regulating a depth to which the case is loaded in the drive device. The two surfaces are positioned on straight lines that pass along the loading direction through the center of the positioning holes when seen from below. Positioning pins of the drive device are inserted into the positioning holes when regulating protrusions of the drive device abut against the two surfaces to regulate the depth to which the case is loaded.

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: The recording medium cartridge includes a cartridge case containing a recording medium and a noncontact-type memory having an IC section for storing information and performing signal processing and an antenna section for transmitting and receiving signals. The antenna section of the memory is placed in a region furthest from metallic parts.

Abstract: A recording tape cartridge which can prevent positional offset of a case with respect to a cartridge accommodating device. Accompanying operation of loading the cartridge in an arrow A direction into a drive device, a door is moved to a side of opening an opening while an operation projection is engaged by an engagement projection. At this time, a pushing/engaging member of the drive device enters into a cell retention notch, and pushes a push surface and engages with an engagement surface. In this way, at the case, a moment in an arrow E direction around a region of engagement is offset, and the case is prevented from being coming out from the drive device. An inclined surface permits advance and withdrawal of the pushing/engaging member into and from the notch.

Abstract: In a recording tape cartridge, a reel has a reel hub around which a magnetic tape is wound. An annular reel gear is formed at an outer surface of a bottom portion of the reel hub. Rotation of the reel is impeded by a braking member engaging with an engaging gear formed at an inner surface of the bottom portion. When a clutch member is pressed by a rotating shaft of a drive device, the clutch member is guided by rotation restricting ribs which are engaged with rotation restricting grooves such that relative rotation is impossible, and the clutch member moves in an axial direction of the reel and cancels engagement of the braking member with the engaging gear. A press operation surface and the rotation restricting grooves are positioned further toward a radial direction inner side than the reel gear.

Abstract: A recording medium cartridge and producing method thereof, such that slidability of resin-fabricated members of different materials against one another can be assured even in conditions in which impacts are successively applied. The recording medium cartridge is provided with a recording medium T and a plurality of resin-fabricated components. A mixture C of perfluoropolyethylene and polytetrafluoroethylene is interposed at boundary surfaces at which the resin-fabricated components of different material slide against one another and/or at boundary surfaces at which the resin-fabricated components of different material slide against one another.

Abstract: A recording tape cartridge which, with a structure having good produceability, can prevent wear of regions of abutment of a braking member and a releasing member at a time when a reel rotates. In the recording tape cartridge, when the braking member is positioned at a rotation locking position at which the braking member is engaged with an engaging gear provided at a floor portion of a reel hub, rotation of the reel, which is accommodated within a case, with respect to the case is impeded. When the braking member is held at a rotation permitting position at which engagement is released while the braking member abuts a clutch member, rotation of the reel with respect to the case is permitted. The braking member and the clutch member are respectively formed by resin molding, and abut one another at a slide-contact projection which is a resin portion, and a metal plate which is fixed to a clutch main body by caulking.

Abstract: The recording medium cartridge accommodates a recording medium such as a magnetic tape, a optical and/or magnetic disk, or the like in a cartridge body having an upper half and a lower half. A non-contact type memory device storing information, for example, given when producing the cartridge is provided in a reel of at least one of upper and lower flanges of a tape reel or on a surface facing to the tape winding surface of the body in the cartridge accommodating the tape reel wound with the tape, or in a recessed portion formed in at least one of a bottom surface of the lower half and an upper surface of a slider or in the slider in the cartridge having the slider, or in a transparent window of the body. A part of at least one of the upper and lower halves that corresponds to the memory device may be notched. The memory device may be welded together when fitting other members.

Abstract: In a recording tape cartridge, a reel, at which a magnetic tape is wound around a cylindrical tube portion of a reel hub provided at an axially central portion of the reel, is accommodated within a case so as to be movable in an axial direction between a ceiling plate and a floor plate. A locking member can be set at a restricting position, at which, in a state in which the reel is shifted toward the floor plate, a lock portion is disposed in a gap between a top end portion of the reel and the ceiling plate and the locking member restricts axial direction movement of the reel, and a restriction releasing position, at which the locking member is withdrawn from the restricting position and permits the axial direction movement of the reel.

Abstract: The present invention provides a recording tape cartridge including an engagement portion formed on a hub of a reel; a brake member provided movable along an axial-direction, regulating reel rotation by engaging with the engaging portion and releasing the engagement to allow reel rotation; a component mounting portion formed at a position further at inner-side of the hub; a lock member, mounted at the component mounting portion movable in a radial-direction and provided between the reel and the case to regulate movement of the reel in the axial-direction, which moves away from the reel by being pressed by the brake member to allow movement of the reel, the lock member having a center of gravity provided along a direction in which the brake member initially abuts with and presses the lock member; and a biasing member biasing the lock member in the radial-direction.

Abstract: A recording-tape cartridge including a case accommodating a reel; a mounting portion formed at the case, at which guide-wall portions and locking members capable of positioning at vertical-movement-locking-position and vertical-movement-allowing-position are provided; a switching member for switching the locking members between the vertical-movement-locking-position and the vertical-movement-allowing-position, guide portions inserted between the guide wall portions to guide the switching member; an urging-member; and a disengagement-prevention-member, in which draft angles of the guide portions and the guide-wall portions ?0.5°, respectively, and at the vertical movement-allowing-position, a clearance between a tip outside-surface of the guide portion and an inside-surface of the guide wall portion?a clearance between a tip inside-surface of the guide wall portion and the outside-surface of the guide portion, and the maximum clearance is set between 0.05-0.