| 摘要 |
The present invention provides a threader of a sewing machine in which the entire head portion can be made compact and the operator can perform threading work with one hand. The threader comprises: a threading shaft approaching a needle bar for moving a supporting sewing needle vertically; a threading hook for moving a hook portion in and out of a needle hole; a positioning member for regulating a lowermost position of the threading shaft to a position where the height of the hook portion matches that of the needle hole; a first rotary mechanism for rotating by a predetermined angle near the lowermost point of the threading shaft so that the hook portion is inserted into the needle hole of the sewing needle; and a thread-guiding member for guiding the top thread to the hook portion at a near lowermost point of the threading shaft. The threader further comprises a second rotary mechanism for rotating by a predetermined angle so that a thread-catching portion of the thread-guiding member passes through the position of the needle hole of the sewing needle at a near lowermost point of the threading shaft, and the first rotary mechanism and the second rotary mechanism rotate the threading hook and the thread-guiding member in opposite directions.
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