Knee-operated lifting device for sewing machine sewing feet for attachment to a sewing machine base body (A), the sewing machine base body (A) being provided with a sewing foot drive shaft (A1), the knee-operated lifting device being connected in an articulated manner to the sewing foot drive shaft (A1) around the To drive the sewing foot (Z) for raising or lowering, the knee-operated lifting device having the following components: • a knee-operated lifting device (10) which is provided with a knee control handle (11) that can be operated by a user, • a pull rope (30) which is attached to the Knee control handle (11) is connected, • a rotating plate (42) which is connected to the sewing machine base body (A) in an articulated manner and is provided with a pull rope connection (422) and a sliding hole (424), the pull rope (30) with the pull rope connection ( 422), the rotary plate (42) also being provided with an escape hole (425), one end of which is connected in an articulated manner to the sliding hole (424) i st, and • a drive rod (45), one end of which is inserted into the sliding hole (424) and slidably arranged in the sliding hole (424) and the escape hole (425), the other end of which is articulated to the sewing foot drive axis , • where the knee control handle (11) can pull the pull rope (30) over the knee-operated lifting device (10), whereby the turntable (42) is driven to rotate and the drive rod (45) or the sewing foot drive axis (A1) also rotate so that the sewing foot (Z) rises, whereby when the rotary plate (42) is reset, the drive rod (45) or the sewing foot drive axis (A1) turn back so that the sewing foot (Z) lowers.
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