| 摘要 |
Disclosed herein is a magnetic tape cartridge in which reliability has been enhanced by preventing a thin insertion-guide portion, provided in an opening for guiding a leader pin, from being deformed due to shock produced by dropping, etc. The magnetic tape cartridge has a cartridge case 4 in which a single reel with magnetic tape 6 wound thereon is rotatably housed. In an opening 10 through which a leader member 5 rigidly attached to the leading end of the magnetic tape 6 is pulled in and out, an insertion-guide portion 21 for guiding an end portion of the leader member 5 is formed by making the case wall surface thin, and a cutout is provided on at least one side of the insertion-guide portion 21 at a position of an edge of the opening 10.
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