Magnetic tape cartridge

Abstract

A magnetic tape cartridge includes a cartridge case, which is formed by fastening upper and lower cases integrally and has a tape leader opening in side walls of the upper and lower cases. Within the cartridge case, a single reel with magnetic tape wound thereon is rotatably housed. As lender leader pin firmly attached to the leading end of the magnetic tape is detachably held near the tape leader opening and between the upper and lower cases. In the magnetic tape cartridge, a small-diameter pin for fastening the upper and lower cases is press-fitted near a holding portion of the cartridge case which holds the leader pin.

What is claimed is:  
     
         1 . A magnetic tape cartridge comprising: 
 a cartridge case with a tape leader opening in side walls;    a single reel having magnetic tape wound thereon, and rotatably housed within said cartridge case; and    a slide door, which is urged toward a closing position by a spring and held in said closing position by abutting said cartridge case, for opening and closing said tape leader opening;    wherein said slide door has an abutting surface that abuts said cartridge case, said abutting surface being provided at a position spaced rearward from a front end of said slide door.    
     
     
         2 . The magnetic tape cartridge as set forth in    claim 1   , wherein said cartridge case is provided with an abutting surface conforming to the abutting surface of said slide door.  
     
     
         3 . A magnetic tape cartridge comprising: 
 a cartridge case with a tape leader opening in side walls;    a single reel having magnetic tape wound thereon, and rotatably housed within said cartridge case; and    a slide door, which is urged toward a closing position by a spring and held in said closing position by abutting said cartridge case, for opening and closing said tape leader opening;    wherein said cartridge further comprises means for positioning said slide door in said closing position and means for regulating a vertical position of said slide door.    
     
     
         4 . The magnetic tape cartridge as set forth in    claim 3   , wherein the abutting surfaces of said slide door and said cartridge case are surfaces inclined with respect to a direction in which said slide door slides.  
     
     
         5 . The magnetic tape cartridge as set forth in    claim 4   , wherein said inclined surfaces are tapered surfaces.  
     
     
         6 . The magnetic tape cartridge as set forth in    claim 4   , wherein said inclined surfaces are curved surfaces.  
     
     
         7 . A magnetic tape cartridge comprising: 
 a cartridge case, formed by fastening upper and lower cases integrally, and having a tape leader opening in side walls of said upper and lower cases;    a single reel having magnetic tape wound thereon, and rotatably housed within said cartridge case; and    a slender leader pin firmly attached to a leading end of said magnetic tape and detachably held near said tape leader opening and between said upper and lower cases;    wherein a small-diameter pin for fastening said upper and lower cases is press-fitted near a holding portion of said cartridge case which holds said leader pin.    
     
     
         8 . The magnetic tape cartridge as set forth in    claim 7   , wherein said small-diameter pin has a stem portion, a large-diameter head portion at one end of said stem portion, and a protrusion at the other end of said stem portion, the protrusion being provided to prevent said small-diameter pin from coming out.  
     
     
         9 . A magnetic tape cartridge comprising: 
 a cartridge case, formed by fastening upper and lower cases integrally, and having a tape leader opening in side walls of said upper and lower cases;    a single reel having magnetic tape wound thereon, and rotatably housed within said cartridge case; and    a flat non-contact type memory element, where data is stored, housed within said cartridge case;    wherein said cartridge case is provided with an element mounting portion having an insertion slit open to a case surface, and after assembly of said cartridge case, said memory element is inserted through said insertion slit and held in said element mounting portion.    
     
     
         10 . The magnetic tape cartridge as set forth in    claim 9   , wherein said insertion slit is formed in a side surface of said cartridge case and said memory element is inserted and held in said element mounting portion so that it forms an angle of approximately 45 degrees with a bottom surface of said cartridge case.  
     
     
         11 . The magnetic tape cartridge as set forth in    claim 9   , wherein said insertion slit is formed in a top surface or bottom surface of said cartridge case and said memory element is inserted and held in said element mounting portion so that it forms an angle of approximately 90 degrees with the bottom surface of said cartridge case.  
     
     
         12 . The magnetic tape cartridge as set forth in    claim 9   , wherein said memory element has elastic portions at its side portions and said memory element is held in said element mounting portion by elastic deformation of said elastic portions produced when said memory element is inserted through said insertion slit.  
     
     
         13 . The magnetic tape cartridge as set forth in    claim 9   , wherein said memory element is press-fitted in said element mounting portion through said insertion slit.