Leader block rotary mechanism for cartridge magnetic tape device
AssigneeNEC Corporation
InventorManabu Tsuchiya
Life of this patent
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Abstract
Provided is a leader block rotary mechanism for a cartridge magnetic tape device, which allows over-rotation of a rotator cam in the capture direction by providing an over-rotation limiting device in a rotator cam so that damages on mechanism parts and motors due to over-rotation of the rotator cam can be prevented. Over-rotation of the rotator cam can be facilitated so that fine adjustment in the rotation amount of the loader cam gear and the rotator cam becomes unnecessary. Further, there is no abnormal capture operation generated even when there is over or less rotation of the rotator cam. The rotator cam is forcibly rotated by a release cam in the release direction through reverse rotation of the loader cam gear so as to prevent the rotation from being stuck at the time of release.
Claims7
A leader block rotary mechanism for a cartridge magnetic tape device, comprising:
- a leader block having a hook part for capturing a leader pin of a magnetic tape housed in a cartridge;
- a leader block picker for capturing the leader pin onto the hook part by holding and rotating the leader block set in a position for capturing the leader pin;
- a rotator lever integrally rotating with the leader block picker;
- a rotator cam for driving to rotate the rotator lever;
- and
- a loader cam gear for driving to rotate the rotator cam, wherein:
- the rotator cam, while comprising an over-rotation limiting device, is constantly energized to rotate in the direction where the leader pin is released from the hook part so as to give torque to the rotator lever in the release direction;
- the over-rotation limiting device transmits the torque of the rotator cam in the capture direction to the rotator lever and also allows rotation of the rotator cam while keeping the rotator lever, the leader block picker and the leader block at the rotation end position;
- and
- the loader cam gear, by forward rotation, rotates the rotator cam in the capture direction in resistance to the torque given to the rotator cam in the release direction.
Dependencies are inferred from the claim text.