| 摘要 |
A presser regulating thumb screw device of a sewing machine screwed into an arm [2] of the sewing machine and including a presser regulating thumb screw [18], the pressure regulating thumb screw [18] being turned clockwise or counter clockwise for regulating to increase or decrease a pressing force by a presser foot [6], wherein the presser regulating thumb screw [18] comprises a screw body [8] and a fitting member [9] fitted in the screw body [8], the screw body [8] is bored in a central axis thereof to form a small diameter fitting hole [8a], a large diameter receiving hole having a diameter larger than that of the fitting hole [8a], and a spot facing part [8c] extending from the large diameter hole [8b] having a diameter larger than that of the large diameter hole [8b], the small diameter fitting hole [8a], the large diameter fitting hole [8b] and the spot facing part [8c] are arranged in an ascending order, and wherein the fitting member [9] is fixed to the spot facing part [8c] so as not to turn relative to the spot facing part [8c], and the fitting member [9] has a fitting part [9b], the fitting part [9b] having a different shape other than a circular shape in cross section.
|
