Recording tape cartridge and plate spring
View Patent ↗A tape cartridge which, in a state in which a reel cannot rotate, restricts movement of a braking member and restricts movement of the reel. In a state in which engaging walls of locking members are engaged with a top edge portion of a reel hub, step portions and the engaging walls abut a top surface of an upper flange and an inner peripheral surface of the reel hub. In this way, when the cartridge is not in use, vertical direction movement of the reel is restricted. Even if impact of a drop or the like is applied to the recording tape cartridge 10 , the reel does not rise up. Accordingly, a problem such as the braking member tilting and becoming anchored does not arise. It is also possible to overcome a problem of the upper flange or a lower flange of the reel breaking due to the reel moving within a case when the tape cartridge is dropped.
1. A recording tape cartridge comprising:
a case;
a reel rotatably accommodated in the case, a recording tape being wound around the reel, the reel having a hub and an engaging portion formed at a floor wall of the hub;
a braking member provided so as to face the engaging portion and so as to be movable along an axial direction of the hub, the braking member being able to restrict rotation of the reel by engaging with the engaging portion, and being able to permit the rotation of the reel by canceling a state of engagement with the engaging portion;
a part mounting portion formed at the case;
a locking member mounted to the part mounting portion so as to be movable in a radial direction of the reel, the locking member restricting axial direction movement of the reel by being interposed between the reel and the case, and permitting movement of the reel by being pushed by the braking member and moving away from the reel; and
an urging element urging the locking member in the radial direction of the reel, and interposed between the reel and the case, and restricting the axial direction movement of the reel,
wherein convex and concave portions are provided at sliding surfaces of the locking member and the case.
2. The cartridge of claim 1 , further comprising a stabilizing portion jutting out from a corner portion, the stabilizing portion able to generate a rotational moment which opposes a rotational moment which is generated at a corner portion of the locking member by pushing force of the braking member.
3. The cartridge of claim 1 , wherein the urging element has a plate spring having a base portion fixed at a center of the part mounting portion, and a leg piece spreading radially from the base portion.
4. The cartridge of claim 3 , wherein the locking member has an inclined surface which the leg piece abuts and which is for obtaining a component of force of force which pushes the locking member toward the case and which is generated by the urging force of the plate spring.
5. A recording tape cartridge comprising:
a case;
a reel rotatably accommodated in the case, a recording tape being wound around the reel, the reel having a hub and an engaging portion formed at a floor wall of the hub;
a braking member provided so as to face the engaging portion and so as to be movable along an axial direction of the hub, the braking member being able to restrict rotation of the reel by engaging with the engaging portion, and being able to permit the rotation of the reel by canceling a state of engagement with the engaging portion;
a part mounting portion formed at the case;
a locking member mounted to the part mounting portion so as to be movable in a radial direction of the reel, the locking member restricting axial direction movement of the reel by being interposed between the reel and the case, and permitting movement of the reel by being pushed by the braking member and moving away from the reel;
an urging element urging the locking member in the radial direction of the reel, and interposed between the reel and the case, and restricting the axial direction movement of the reel; and
a stabilizing portion jutting out from a corner portion, the stabilizing portion able to generate a rotational moment which opposes a rotational moment which is generated at a corner portion of the locking member by pushing force of the braking member.
6. The cartridge of claim 5 , wherein the urging element has a plate spring having a base portion fixed at a center of the part mounting portion, and a leg piece spreading radially from the base portion.
7. The cartridge of claim 6 , wherein the locking member has an inclined surface which the leg piece abuts and which is for obtaining a component of force of force which pushes the locking member toward the case due to urging force of the plate spring.
8. A recording tape cartridge comprising:
a case;
a reel rotatably accommodated in the case, a recording tape being wound around the reel, the reel having a hub and an engaging portion formed at a floor wall of the hub;
a braking member provided so as to face the engaging portion and so as to be movable along an axial direction of the hub, the braking member being able to restrict rotation of the reel by engaging with the engaging portion, and being able to permit the rotation of the reel by canceling a state of engagement with the engaging portion;
a part mounting portion formed at the case;
a locking member mounted to the part mounting portion so as to be movable in a radial direction of the reel, the locking member restricting axial direction movement of the reel by being interposed between the reel and the case, and permitting movement of the reel by being pushed by the braking member and moving away from the reel; and an urging element urging the locking member in the radial direction of the reel, and interposed between the reel and the case, and restricting the axial direction movement of the reel,
wherein the urging element has a plate spring having a base portion fixed at a center of the part mounting portion, and a leg piece spreading radially from the base portion.
9. A recording tape cartridge comprising:
a case;
a reel rotatably accommodated in the case, a recording tape being wound around the reel, the reel having a hub and an engaging portion formed at a floor wall of the hub;
a braking member provided so as to face the engaging portion and so as to be movable along an axial direction of the hub, the braking member being able to restrict rotation of the reel by engaging with the engaging portion, and being able to permit the rotation of the reel by canceling a state of engagement with the engaging portion;
a part mounting portion formed at the case;
a locking member mounted to the part mounting portion so as to be movable in a radial direction of the reel, the locking member restricting axial direction movement of the reel by being interposed between the reel and the case, and permitting movement of the reel by being pushed by the braking member and moving away from the reel; and an urging element urging the locking member in the radial direction of the reel, and interposed between the reel and the case, and restricting the axial direction movement of the reel,
wherein the urging element has a plate spring having a base portion fixed at a center of the part mounting portion, and a leg piece spreading radially from the base portion,
wherein the locking member has an inclined surface which the leg piece abuts and which is for obtaining a component of force of force which pushes the locking member toward the case and which is generated by the urging force of the plate spring.
10. A plate spring machined so as to comprise:
a plurality of leg pieces; and
a joining portion joining the leg pieces at a center, and causing the leg pieces to extend radially.