| 摘要 |
In a recording tape cartridge, a reel locking member, which is positioned at a rotation locking position meshes with an engaging gear which is in a form of internal teeth and which is at a reel, such that rotation of the reel with respect to a case is impeded. When a clutch member is pushed up, a rotating cam member, which is screwed together with the clutch member, rotates toward one side, and the reel locking member moves to a releasing position by a positive motion cam structured by a cam projection and a cam groove. When the clutch member is pushed downward, the rotating cam member rotates toward another side, and the reel locking member moves to the rotation locking position by the positive motion cam.
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