| 摘要 |
A foot controller for a sewing machine includes a drive start switch ( 18 ) provided in a drive circuit ( 17 ) of a sewing machine motor ( 10 ) and a speed adjusting circuit ( 25 ) having a variable resistor ( 26 ) for adjusting a speed of the sewing machine motor ( 10 ) and a switching element ( 28 ) cooperating with the variable resistor ( 26 ), characterized by an interruption circuit ( 19 ) interrupting the drive circuit ( 17 ) of the sewing machine motor ( 10 ) when the switching element ( 28 ) is short-circuited while the drive start switch ( 18 ) is in an off-state.
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