| 摘要 |
A thread cutting device for a sewing machine includes a horizontal base plate, an elongated horizontal feed plate and an elongated horizontal cutting plate. A driving rod is mounted pivotally on the base plate, and can be swung by a driving unit to swing the feed plate and the cutting plate on the base plate. When the feed plate moves forward toward a thread-engaging needle, a projection of the feed plate contacts a fixed stop member of the base plate so as to prevent further forward movement of the feed plate, thereby permitting forward movement of the cutting plate relative to the feed plate. At this time, the cutting plate is guided to move to a front limit position in a direction parallel to the needle. In this way, when the cutter is driven by the driving unit to move rearward from the front limit position, a row of threads can be effectively cut off by the cutter.
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