| 摘要 |
A threading mechanism for a magnetic tape machine is contrived so as to obtain sufficient driving power when the threading arm is latched with a leader block at a position where the leader block is stopped in a cartridge or a machine reel, and is also contrived so as to avoid impact force based on a driving motor even when the threading arm stops suddenly at the stop position. The positions where the leader block is stopped in the cartridge and the machine reel are inside a track of the threading arm which swings around its pivoting point and the leader block is threaded therebetween. A driving arm for swinging the threading arm is motor-driven around a pivoting point of the driving arm itself. The driving arm causes the threading arm to work together between the positions where the leader block is stopped, and cancels the working with the threading arm in the direction of the trace over the disengaging positions, so as to be swung.
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