| 摘要 |
<p>In a disc cartridge, a shutter slidably attached on a shell can be prevented from being projected from a front end surface of the shell by means of a spring force exerted by a spring. The shutter (5) includes first and second shutter plate portions (5a and 5b) overlapped on upper and lower surfaces (3a and 3b) of the shell (3) and a linkage plate portion (5c) overlapped on the front end surface (3c) of the shell (3). First and second slide guide projections (39 and 40) are installed on the second shutter plate portion (5b) and are inserted into first and second slide guide grooves (37 and 38) formed along the front end surface (3c) of the shell (3). A difference in distance (L5) (L5 = L3 - L1) between a distance (L3) from an inner surface of the first slide guide projection (39) to an outer surface of the linkage plate portion (5c) of the shutter (5) and a distance L1 from the first slide guide projection (39) to the front end surface (3c) of the shell (3) is set to be smaller than the difference in distance (L6) (L6 = L4 - L2) between a distance (L6) from an inner surface of the second slide guide projection (40) to the outer surface of the linkage plate portion (5c) of the shutter (5) and a distance (L2) from the side surface (38a) of the second slide guide groove (38) to the front end surface (3c) of the shell (3). <IMAGE></p> |
