| 摘要 |
Provided is a buttonhole switch mechanism of a buttonhole sewing machine including a buttonhole presser mounted on a lower end of a presser bar of the sewing machine and having a presser frame, a buttonhole switch mechanism disposed on an arm section of the sewing machine, a feed dog disposed below the buttonhole presser to move cloth, a sewing needle forming stitches in the cloth with vertical movement, a controller performing control on the movement of the feed dog and the sewing needle, a fixing member fixed to a non-movable part of a sewing machine main body, a mount supported so as to be movable in the front-and-rear direction with respect to the fixing member, an adjustment mechanism adjusting and fixing the relative positions of the fixing member and the mount in the front-and-rear direction, a lever member supported by a rotary shaft provided at the mount, and the detection switch fixed to the mount.
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