| 摘要 |
PROBLEM TO BE SOLVED: To provide a needle thread cassette and a thread-exchanging device for simplifying the structure of the thread-exchanging device and miniaturizing the device by simplifying the color-changing operation of a needle thread during sewing operation or thread-exchanging operation. SOLUTION: The needle thread-exchanging device comprises a cassette body 5 including a cassette body 14 made of a synthetic resin, and a cassette lid 15 that can be opened or closed to the cassette body 14, a bobbin-winding fitting member 7 that is provided inside the cassette body 5 and fits a needle thread bobbin 6 where a needle thread 2 is wound, a cutting mechanism 9 for cutting the needle thread 2 that is withdrawn from the needle thread bobbin 6, and a thread end-retaining member 10 for retaining the thread end section of the needle thread 2 that is cut by the cutting mechanism 9, thus dispensing with withdrawing the thread end section every time the cassette is fitted for setting, and simplifying the thread-exchanging operation of the needle thread 2 during sewing operation.
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