A sewing machine comprises a presser foot; a drive shaft operably
connected to the presser foot which imparts periodic upward movement to
the presser foot; and a biasing mechanism operably connected to the
presser foot which normally biases the presser foot into a downward
position, the biasing mechanism comprising a toggle link having a pivot,
a resilient element operably connected to the toggle link on one side of
the pivot and the presser foot operably connected to the toggle link on
the other side of the pivot.