Magnetic tape cartridge
View Patent ↗A magnetic tape cartridge includes a reel around which a magnetic tape is wound, a cartridge case rotatably accommodating the reel, a reel lock for locking rotation of the reel relative to the cartridge case, a resilient member urging the reel lock toward the reel, a release pad for disengaging the reel lock by displacing the reel lock against an urging force of the resilient member, so as to allow rotation of the reel, and a pivot provided on the reel lock at a position facing with and slidably contacting a contact surface of the release pad in a manner allowing rotation of the release pad. The pivot and the contact surface are both made of resin, and the contact surface is made of a resin having a higher hardness than the pivot.
1. A magnetic tape cartridge comprising:
a reel around which a magnetic tape is wound;
a cartridge case rotatably accommodating the reel;
a reel lock for locking rotation of the reel relative to the cartridge case;
a resilient member urging the reel lock toward the reel to lock the reel;
a release pad for disengaging the reel lock by displacing the reel lock against an urging force of the resilient member, so as to allow rotation of the reel; and
a pivot provided on the reel lock at a position facing with and slidably contacting a contact surface of the release pad in a manner allowing rotation of the release pad,
wherein the pivot and the contact surface are both made of resin, and the contact surface is made of a resin having a higher hardness than the pivot,
wherein the pivot is made of a resin having Vickers hardness value of 10 to 16, and the contact surface is made of a resin having Vickers hardness value of equal to or greater than 18.
2. A magnetic tape cartridge according to claim 1 , wherein the contact surface is made of a different resin than the other parts of the release pad.
3. A magnetic tape cartridge according to claim 2 , wherein the pivot is made of a different resin than the other parts of the reel lock.
4. A magnetic tape cartridge according to claim 1 , wherein the pivot is made of a different resin than the other parts of the reel lock.
5. A magnetic tape cartridge according to claim 1 , wherein the pivot is made of a resin selected from the group consisting of polyacetal (POM), poly buthylene terephthalete (PBT) and nylon, and the contact surface is made of a resin selected from the group consisting of polyacetal (POM), poly buthylene terephthalete (PBT), nylon, fiber-reinforced PTB, fiber-reinforced POM, and fiber-reinforced nylon.
6. A magnetic tape cartridge according to claim 1 , wherein the reel lock is made of POM, and the release pad is made of PBT.
7. A magnetic tape cartridge according to claim 1 , wherein the contact surface of the release pad is made of fiber-reinforced plastic (FRP).
8. A magnetic tape cartridge comprising:
a reel around which a magnetic tape is wound;
a cartridge case rotatably accommodating the reel;
a reel lock for locking rotation of the reel relative to the cartridge case;
a resilient member urging the reel lock toward the reel to lock the reel;
a release ad for disengaging the reel lock by displacing the reel lock against an urging force of the resilient member, so as to allow rotation of the reel; and
a pivot provided on the reel lock at a position facing with and slidably contacting a contact surface of the release pad in a manner allowing rotation of the release pad,
wherein the pivot and the contact surface are both made of resin, and the contact surface is made of a resin having a higher hardness than the pivot,
wherein the contact surface is made of a different resin than the other parts of the release pad.
9. A magnetic tape cartridge according to claim 8 , wherein the pivot is made of a different resin than the other parts of the reel lock.
10. A magnetic tape cartridge according to claim 8 , wherein the release pad is made by two-color molding.
11. A magnetic tape cartridge according to claim 8 , wherein the pivot is made of a resin selected from the group consisting of polyacetal (POM), poly buthylene terephthalete (PBT) and nylon, and the contact surface is made of a resin selected from the group consisting of polyacetal (POM), poly buthylene terephthalete (PBT), nylon, fiber-reinforced PBT, fiber-reinforced POM, and fiber-reinforced nylon.
12. A magnetic tape cartridge according to claim 11 , wherein the pivot is made of a resin having Vickers hardness value of 11 to 13, and the contact surface is made of a resin having Vickers hardness of equal to or greater than 20.
13. A magnetic tape cartridge according to claim 12 , wherein the reel lock is made by two-color molding.
14. A magnetic tape cartridge according to claim 13 , wherein the release pad is made by two-color molding.
15. A magnetic tape cartridge according to claim 8 , wherein the contact surface of the release pad is made of fiber-reinforced plastic (FRP).
16. A magnetic tape cartridge comprising:
a reel around which a magnetic tape is wound;
a cartridge case rotatably accommodating the reel;
a reel lock for locking rotation of the reel relative to the cartridge case;
a resilient member urging the reel lock toward the reel to lock the reel;
a release ad for disengaging the reel lock by displacing the reel lock against an urging force of the resilient member, so as to allow rotation of the reel; and
a pivot provided on the reel lock at a position facing with and slidably contacting a contact surface of the release pad in a manner allowing rotation of the release pad,
wherein the pivot and the contact surface are both made of resin, and the contact surface is made of a resin having a higher hardness than the pivot,
wherein the pivot is made of a different resin than the other parts of the reel lock.
17. A magnetic tape cartridge according to claim 16 , wherein the reel lock is made by two-color molding.
18. A magnetic tape cartridge according to claim 16 , wherein the pivot is made of a resin selected from the group consisting of polyacetal (POM), poly buthylene terephthalete (PBT) and nylon, and the contact surface is made of a resin selected from the group consisting of polyacetal (POM), poly buthylene terephthalete (PBT), nylon, fiber-reinforced PBT, fiber-reinforced POM, and fiber-reinforced nylon.
19. A magnetic tape cartridge comprising:
a reel around which a magnetic tape is wound;
a cartridge case rotatably accommodating the reel;
a reel lock toy locking rotation of the reel relative to the cartridge case;
a resilient member urging the reel lock toward the reel to lock the reel;
a release pad for disengaging the reel lock by displacing the reel lock against an urging force of the resilient member, so as to allow rotation of the reel; and
a pivot provided on the reel lock at a position facing with and slidably contacting a contact surface of the release pad in a manner allowing rotation of the release pad,
wherein the pivot and the contact surface are both made of resin, and the contact surface is made of a resin having a higher hardness than the pivot,
wherein the pivot is made of a resin having Vickers hardness value of 11 to 13, and the contact surface is made of a resin having Vickers hardness of equal to or greater than 20.