Magnetic tape cartridge
View Patent ↗A magnetic tape cartridge is equipped with a cartridge, a single tape reel, a tape leader pin, and a U-shaped clip. The cartridge case is formed by fastening upper and lower cases of synthetic resin together and has a tape leader opening formed in the upper and lower side walls of the upper and lower cases. The single tape reel has magnetic tape wound thereon and is rotatably housed within the cartridge case. The tape leader pin is firmly attached to a leading end of the magnetic tape, and is detachably held in an upright state between the upper and lower cases so that it faces the tape leader opening. The U-shaped clip is attached to walls near the tape leader opening to fasten the upper and lower cases together, whereby the fastening strength of the upper and lower cases is enhanced.
1. A magnetic tape cartridge comprising:
a cartridge case, formed by fastening upper and lower cases of synthetic resin together, and having a tape leader opening formed in upper and lower side walls of said upper and said lower cases;
a single tape reel having magnetic tape wound thereon and rotatably housed within said cartridge case; and
a tape leader pin, firmly attached to a leading end of said magnetic tape, and detachably held in an upright state between said upper and lower cases so that said tape leader pin faces said tape leader opening;
wherein said tape leader pin has axially opposite flanges;
wherein a length of said tape leader pin is 18.7 mm;
wherein the cartridge case has a thickness of 1.38 mm above and below the axially opposite flanges of the tape leader pin and
further comprising a U-shaped clip attached to walls near said tape leader opening to fasten said upper and said lower cases together,
wherein the U-shaped clip includes a connecting plate portion and a pair of leg portions bent at right angles in the same direction at both ends of the connecting plate portion such that the pair of leg portions, which form the right angles relative to the connecting plate portion, are respectively inserted into the upper and lower sidewalls perpendicular to the tape leader pin detachably held in the upright state.
2. The magnetic tape cartridge as set forth in claim 1 , further comprising a leader-pin holding spring attached to said cartridge case near said tape leader opening, said leader-pin holding spring comprising a mounting portion that includes a rectangular plate and a pair of elastic arm portions, in which top and bottom edges of the mounting portion are provided with engagement recesses, respectively;
wherein said tape leader pin is detachably held by said leader-pin holding spring that elastically abuts said axially opposite flanges in a horizontal direction.
3. A magnetic tape cartridge comprising:
a cartridge case, formed by fastening upper and lower cases of synthetic resin together, and having a tape leader opening formed in upper and lower side walls of said upper and said lower cases;
a single tape reel having magnetic tape wound thereon and rotatably housed within said cartridge case; and
a tape leader pin, firmly attached to a leading end of said magnetic tape, and detachably held in an upright state between said upper and lower cases so that said tape leader pin faces said tape leader opening;
wherein metal reinforcement members are embedded in the upper and lower cases, respectively, near said tape leader opening, in which a first metal reinforcement member is provided above said tape leader pin and a second metal reinforcement member is provided below said tape leader pin such that said first metal reinforcement member and said second reinforcement member embedded in the upper and lower cases are respectively disposed at least over a first flange of the tape leader pin and below a second flange of the tape leader pin, which is axially opposed to the first flange, when the tape leader pin is detachably held in the upright state between said upper and lower cases; and
further comprising a U-shaped clip attached to walls near said tape leader opening to fasten said upper and said lower cases together.
4. The magnetic tape cartridge as set forth in claim 3 , further comprising a leader-pin holding spring attached to said cartridge case near said tape leader opening;
wherein said tape leader pin is detachably held by said leader-pin holding spring that elastically abuts said axially opposite flanges in a horizontal direction.
5. The magnetic tape cartridge as set forth in claim 3 , wherein the U-shaped clip includes a connecting plate portion and a pair of leg portions bent at right angles in the same direction at both ends of the connecting plate portion such that the pair of leg portions, which form the right angles relative to the connecting plate portion, are respectively inserted into the upper and lower sidewalls perpendicular to the tape leader pin detachably held in the upright state.
6. The magnetic tape cartridge as set forth in claim 1 , wherein a thickness of each of said axially opposite flanges is 1.1 mm.