| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic tape cartridge capable of easily coping with the automation of a production line by facilitating the work of attaching a spring member and a slide door. SOLUTION: In the tip of the pressing spring arm 84 of a spring member 8, a tip part 84a is formed so that it is bent orthogonally to the main surface part 71 of a slide door 7 and its tip is bent in a closing direction. In the tip of this tip part 84a, a guide part 84b is formed so as to be bent in a circular-arc shaped in upper and opening directions.
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