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    Electronic sewing machine and presser foot particularly for buttonhole stitches and process for producing buttonhole stitches utilizing alternately operable sensor
    1.
    发明授权
    Electronic sewing machine and presser foot particularly for buttonhole stitches and process for producing buttonhole stitches utilizing alternately operable sensor 失效
    电子缝纫机和压脚，特别适用于纽扣眼线圈和使用交替操作的传感器生产纽扣针迹的工艺

    公开(公告)号：US4878444A

    公开(公告)日：1989-11-07

    申请号：US188011

    申请日：1988-04-29

    申请人： Yasuro Sano ,  Akio Koide ,  Toru Hyodo ,  Fumihiko Kobayashi ,  Takayuki Kawasato ,  Yasuhiko Osanai

    发明人： Yasuro Sano ,  Akio Koide ,  Toru Hyodo ,  Fumihiko Kobayashi ,  Takayuki Kawasato ,  Yasuhiko Osanai

    IPC分类号： D05B3/06 ,  D05B19/12

    CPC分类号： D05B19/12 ,  D05B3/06

    摘要： An electronic zigzag sewing machine is provided with a presser foot including a switch lever pivotable between a first and second position. During buttonhole stitching operation the switch lever remains in the first position, but it is shifted to the second position when either one of longitudinal ends of a buttonhole is detected. A photo-sensor is mounted to the presser foot to output a detection signal when the switch lever is in the second position. A pattern number designating a specific stitch pattern of the buttonhole stitches is renewed to the next in response to the detection signal from the photo-sensor. A control system is provided to nullify operation of the photo-sensor during production of bar tacks of the buttonhole stitches so that the pattern number is not renewed in areas of the bar tacks irrespective of output of the detection signal.

    摘要翻译： 一种电子锯齿缝纫机设置有压脚，该压脚包括可在第一和第二位置之间转动的开关杆。 在扣眼缝合操作期间，开关杆保持在第一位置，但是当检测到纽扣孔的纵向端部中的任何一个时，它移动到第二位置。 当开关杆处于第二位置时，光传感器安装到压脚以输出检测信号。 响应于来自光传感器的检测信号，指定针孔针迹的特定针迹图案的图案号更新为下一个。 提供了一种控制系统，用于在生产扣眼针迹的条形钉期间使光电传感器的操作无效，使得在条形接头的区域中不更新图案编号，而与检测信号的输出无关。