| 摘要 |
A recording tape cartridge in which it is possible to reinforce, in a small space, a side wall which is weak in terms of strength due to formation of an opening. The recording tape cartridge has a case which rotatably accommodates a single reel on which a recording tape is wound; an opening, formed in a side wall of the case, for pulling-out of a leader pin attached to an end portion of the recording tape; a pin holding portion holding the leader pin in a vicinity of the opening; an anchor spring holding the leader pin at the pin holding portion by pressing the leader pin by a free end; and a spring holding portion holding a proximal portion of the anchor spring in a vicinity of the pin holding portion. The spring holding portion is formed by ribs which jut out into the case from the side wall; and an anchor portion, the anchor spring being held between the anchor portion and the ribs.
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