摘要:
Disclosed herein is a magnetic tape cartridge including a cartridge case in which a single reel with magnetic tape wound on an outer periphery of a reel drum is rotatably housed. The magnetic tape cartridge further includes a locking member, provided within the reel drum so that it is movable between a locking position and an unlocking position in the axial direction of the reel. The locking member is used for locking the reel to restrain rotation of the reel during periods of non-use. In the magnetic tape cartridge, a first radial clearance between the locking member and the reel drum is set smaller than a second radial clearance between the reel and the cartridge case so that when the magnetic tape cartridge is vertically loaded into a cartridge drive unit, chucking failure is prevented.
摘要:
A single reel with magnetic tape wound thereon is housed in a case. A restraining member, for restricting rotation of the reel by moving toward or away from the reel, is urged in a restraining direction by an urging member. The pushing-up portions of a releasing member are inserted into the through holes bored in the reel gear of the reel 2 so that the lower ends can abut a driving gear. The releasing member moves the restraining member in a releasing direction by moving according to the chucking operation of drive-side rotation drive means. In this manner, reel-rotation restraining means allows rotation of the reel when being used and restricts the rotation when not being used. In this construction, each of the through holes is bored between the tooth edges of the reel gear so that the releasing member can perform a reliable releasing operation.
摘要:
A magnetic tape cartridge includes a cartridge casing and a single reel which is contained in the cartridge casing for rotation. A brake device including a brake member is provided with a brake gear and is movable up and down between an operative position where the brake gear prevents rotation of the reel and a retracted position where the brake gear permits rotation of the reel. The reel is provided with a through hole through which a push rod extending from the brake release member projects to be brought into abutment against the drive gear of the tape drive mechanism so that the brake release member moves the brake member to the retracted position. The through hole and the push rod are in contact with each other by way of fine protrusions formed at the push rod or the through hole.
摘要:
Disclosed herein is a magnetic tape cartridge in which stable sliding operability and assembly performance of a write protection member for inhibiting magnetic recording onto magnetic tape are assured between a write-enable position and a write-inhibit position, including a single reel upon which a magnetic tape is wound, the reel being rotatably housed in a cartridge case constituted by an upper and lower case, and a write protection member. The sliding main body of the write protection member has a control portion, a protrusion, and a stopper piece. The stopper piece is provided on the inside surface of the sliding main body so that it protrudes in a direction perpendicular to the sliding direction of the main sliding body. The stopper piece is fitted in a stopper groove formed in an elastically deformable guide wall and holds a stopped position thereof.
摘要:
In a magnetic tape cartridge comprising a thin cartridge casing having flat upper and lower surfaces and a single reel which is housed in the cartridge casing for rotation and around which a magnetic tape is wound, island-like or point-like projections are provided at least three places of the lower surfaces of the cartridge casing near the leading edge and the trailing edge of the cartridge casing as viewed in the direction X of insertion of the magnetic tape cartridge in a recording and reproducing apparatus and recesses which are adapted to be engaged with the projections are provided on the upper surface of the cartridge casing so that, when a plurality of the magnetic tape cartridges are stacked, the projections and the recesses of the cartridge casings of magnetic tape cartridges which are just above and below each other are engaged with each other, whereby the magnetic tape cartridges are prevented from being displaced with respect to each other when a plurality of magnetic tape cartridges are stacked and the sliding resistance when the magnetic tape cartridge is inserted into a recording and reproducing apparatus is reduced.
摘要:
A magnetic tape cartridge is equipped with a cartridge case in which a single reel with magnetic tape wound on the outer periphery of a reel hub is rotatably housed. The cartridge is further equipped with a locking member, and a plurality of ribs extending in the axial direction and formed in the inner periphery of the reel hub. The locking member is provided within the reel hub so that it is movable between a locking position and an unlocking position in the axial direction of the reel. The locking member locks the reel to restrain rotation of the reel when not being used. A first radial clearance between the locking member and the ribs at the locking position is set to a value smaller than a second radial clearance between the locking member and the ribs at the unlocking position.
摘要:
A magnetic tape cartridge including a reel-rotation restraining member which restricts rotation of a reel when not used and allows the rotation of the reel when used. The reel-rotation restraining member has a restraining member, an urging member, and an unlocking member. The restraining member has a restraining gear which meshes with a locking tooth portion, and the restraining member is supported by a support portion of the cartridge case. In the magnetic tape cartridge, the following relationship is met: b≦(2×a×c)/d where “a” represents the length of engagement between the restraining member in an unlocked state and the support portion, “b” represents the clearance between the restraining member and the support portion, “c” represents the space between the tooth of the restraining gear and the locking tooth portion, and “d” represents the outside diameter of the restraining gear.
摘要:
A magnetic tape cartridge has a cartridge casing, a single reel around which a magnetic tape is wound and which is contained in the cartridge casing for rotation and a leader pin fixed to the leading end portion of the magnetic tape. The leader pin is provided at its opposite ends with engagement portions which are brought into engagement with a tape drawing mechanism of a recording and reproducing system when the magnetic tape cartridge is loaded in the recording and reproducing system. The end face of each engagement portion is provided with a recess at which the tape drawing mechanism chucks the leader pin.
摘要:
A magnetic tape cartridge includes a magnetic tape wound around a single reel, a cartridge casing in which the reel is housed for rotation and a reel stopper which locks the reel not to rotate when the magnetic tape cartridge is not being used and releases the reel to permit to rotate when the magnetic tape cartridge is to be used. The reel stopper includes a braking member which is movable between a locking position where it is in contact with the reel to restrict rotation of the reel and a releasing position where it is away from the reel to permit rotation of the same, an urging member which urges the braking member toward the locking position, and a releasing member which is rotated integrally with the reel and moves the braking member toward the releasing position in response to a reel chucking action of the reel drive means of a tape drive. The braking member is provided with a braking gear which is adapted to be engaged, to restrict rotation of the reel, with an engagement gear tooth on an engagement projection formed on the reel while the reel is provided with a guide member which centers the braking member with respect to the reel.
摘要:
A magnetic tape cartridge includes a cartridge casing formed by upper and lower casing halves and a single reel around which a magnetic tape with a leader pin fixed to its leading end is wound and which is contained in the cartridge casing for rotation. A spring member removably holds upper and lower end portions of the leader pin on the cartridge casing. The spring member includes upper and lower holding portions which are respectively brought into abutment against the upper and lower end portions of the leader pin and are connected to each other.