Magnetic tape cartridge
View Patent ↗A magnetic tape cartridge includes a cartridge case, a single tape reel, and a tape leader pin. The cartridge case has a tape leader opening in the side wall thereof. The tape reel with magnetic tape wound thereon is rotatably housed within said cartridge case. The tape leader pin is firmly attached to the leading end of said magnetic tape and is detachably held near the tape leader opening by a spring member. The surface hardness of the sliding surface of the spring member with respect to said tape leader pin is made higher than that of the tape leader pin to prevent an increase in the sliding resistance between the sliding surface of the tape leader pin and the sliding surface of a leader-pin holding spring.
1. A magnetic tape cartridge comprising:
a cartridge case with a tape leader opening in a side wall;
a single tape reel having magnetic tape wound thereon rotatably housed within said cartridge case; and
a tape leader pin, firmly attached to a leading end of said magnetic tape, and detachably held near said tape leader opening by a spring member;
wherein a surface hardness of a sliding surface of said spring member with respect to said tape leader pin is higher than that of said tape leader pin;
wherein said tape leader pin and said spring member are both formed of a same type of material, where the type of material is a metal.
2. A magnetic tape cartridge comprising:
a cartridge case with a tape leader opening in a side wall;
a single tape reel having magnetic tape wound thereon rotatably housed within said cartridge case; and
a tape leader pin, firmly attached to a leading end of said magnetic tape, and detachably held near said tape leader opening by a spring member;
wherein a surface hardness of a sliding surface of said spring member with respect to said tape leader pin is higher than that of said tape leader pin,
wherein said spring member is formed from stainless steel and said sliding surface of said spring member is plated with chromium or nickel.
3. The magnetic tape cartridge as set forth in claim 2 , wherein said sliding surface has a surface hardness Hv of 500 to 700.
4. The magnetic tape cartridge as set forth in claim 2 , wherein said tape leader pin is formed from relatively soft metal material.
5. The magnetic tape cartridge as set forth in claim 4 , wherein said relatively soft metal material is aluminum.
6. The magnetic tape cartridge as set forth in claim 5 , wherein said tape leader pin has a surface hardness H v of 50 to 200.
7. The magnetic tape cartridge as set forth in claim 2 , wherein said tape leader pin is formed from synthetic resin.
8. The magnetic tape cartridge as set forth in claim 7 , wherein said synthetic resin comprises polycarbonate resin.