Recording tape cartridge

1. A recording tape cartridge comprising:

a case rotatably accommodating a single reel on which a recording tape is wound; and

an opening formed in a vicinity of a corner portion of the case, the opening being for pulling-out of a leader member attached to an end portion of the recording tape,

wherein a cover member, which covers the corner portion of the case including a portion of a top surface and/or a bottom surface of the case, is provided so as to be rotatable.

2. The recording tape cartridge of claim 1 , wherein said vicinity of the corner portion means a portion of a front surface adjacent to or in a neighborhood of the corner portion, or portions of the front surface and a side surface adjacent to or in a neighborhood of the corner portion, or portions of the front surface, the side surface, and at least one of the top surface and the bottom surface adjacent to or in a neighborhood of the corner portion.

3. The recording tape cartridge of claim 1 , wherein the cover member is formed of resin, or metal, or resin and metal.

4. A recording tape cartridge comprising:

a case rotatably accommodating a single reel on which a recording tape is wound;

an opening formed in a vicinity of a corner portion of the case, the opening being for pulling-out of a leader member attached to an end portion of the recording tape; and

a door opening and closing the opening,

wherein the door is structured so as to be able to cover the corner portion of the case including a portion of a top surface and/or a bottom surface of the case, when the door closes the opening.

5. The recording tape cartridge of claim 4 , wherein said vicinity of the corner portion means a portion of a front surface adjacent to or in a neighborhood of the corner portion, or portions of the front surface and a side surface adjacent to or in a neighborhood of the corner portion, or portions of the front surface, the side surface, and at least one of the top surface and the bottom surface adjacent to or in a neighborhood of the corner portion.

6. The recording tape cartridge of claim 4 , wherein the door is formed of resin, or metal, or resin and metal.

7. The recording tape cartridge of claim 4 , wherein the door is structured so as to be able to open and close the opening by rotating.

8. A recording tape cartridge comprising:

a case rotatably accommodating a single reel on which a recording tape is wound;

an opening formed in portions of a front surface and a side surface adjacent to a corner portion of the case, the opening being for pulling-out of a leader member attached to an end portion of the recording tape; and

a door opening and closing the opening by rotating,

wherein the door is structured so as to be able to cover the corner portion of the case including a portion of a top surface and/or a bottom surface of the case, when the door closes the opening.

9. The recording tape cartridge of claim 8 , wherein the door is structured so as to cover surfaces including edges of the top surface and the bottom surface of the case which edges are contiguous to the front surface and the side surface.

10. The recording tape cartridge of claim 8 , wherein the door is formed of resin, or metal, or resin and metal.

11. The recording tape cartridge of claim 8 , wherein the door is formed of metal and shaped by one of pressing and die casting.

12. The recording tape cartridge of claim 8 , wherein the door is formed of metal, and a plate thickness of the door is 0.3 mm to 0.5 mm.

13. The recording tape cartridge of claim 8 , wherein the door is formed of resin and metal, and a resin portion of the door and a metal portion of the door are integrally joined by one of adhesion, caulking, fitting, insert molding, and outsert molding.

14. The recording tape cartridge of claim 8 , wherein the door is structured so as to open and close the opening by rotating around a supporting shaft provided at the case.

15. The recording tape cartridge of claim 8 , wherein the door is structured so as to open and close the opening by rotating around a supporting shaft provided at the case, and at least a rotating/sliding portion, through which the supporting shaft is inserted, is formed of resin.

16. The recording tape cartridge of claim 8 , wherein the door is structured so as to be recessed by 0.05 mm or more than the top surface, the bottom surface, and the side surface of the case, when the door closes the opening.

17. The recording tape cartridge of claim 8 , wherein an abutting portion, which abuts an engaging portion of the case, is provided at an inner side of the door.

18. The recording tape cartridge of claim 8 , wherein an abutting portion, which abuts an engaging portion of the case, is provided at an inner side of the door, and the door is structured so as to open and close the opening by rotating around a supporting shaft provided at the case, and a clearance between the engaging portion and the abutting portion is smaller than a clearance between the supporting shaft and a rotating/sliding portion through which the supporting shaft is inserted and a clearance between an inner surface of the door and the top surface, the bottom surface and the side surface of the case.

19. The recording tape cartridge of claim 8 , wherein the door is structured by a closing member of a same size as the opening, and a cover member which covers portions of the front surface, the side surface, and the top surface and/or the bottom surface of the case.

20. The recording tape cartridge of claim 8 , wherein the door is structured by a closing member of a same size as the opening, and a cover member which covers portions of the front surface, the side surface, and the top surface and/or the bottom surface of the case, and at least the closing member is formed of resin.