A drive unit for converting a rotational motion into a linear reciprocating motion, comprising: a motor having a motor shaft for providing a rotational motion of the motor shaft around a longitudinal axis of the motor shaft ; a motor shaft extension comprising at least a first eccentric shaft element that is arranged eccentrically with respect to the longitudinal axis of the motor shaft ; at least one elastically deformable unit having a coupling element arranged for coupling with a driven element, preferably wherein the coupling element is coupled with or can be coupled with a drive shaft ; wherein the first eccentric shaft element is coupled with the deformable unit to periodically deform the deformable unit so that a longitudinal position of the coupling element of the deformable unit periodically changes, preferably wherein the deformable unit is an integral, single unit; characterized in that the deformable unit comprises a first arm section having a first end and a second end and a second arm section having a first end and a second end, wherein the second end of the first arm section and the first end of the second arm section are connected with each other, wherein the first end of the first arm section is connected with a mounting structure that is fixed relative to the motor and the second end of the second arm section is arranged above the first end of the first arm section in the direction of the longitudinal axis of the motor shaft , preferably wherein the second end of the second arm section is connected with the coupling element ; and in that the drive unit further comprises a linear guide and the second end of the second arm section is coupled with the linear guide so that the second end of the second arm section is essentially confined to a reciprocating linear motion in the direction of the longitudinal axis of the motor shaft when the deformable unit is periodically deformed. a motor having a motor shaft for providing a rotational motion of the motor shaft around a longitudinal axis of the motor shaft ; a motor shaft extension comprising at least a first eccentric shaft element that is arranged eccentrically with respect to the longitudinal axis of the motor shaft ; at least one elastically deformable unit having a coupling element arranged for coupling with a driven element, preferably wherein the coupling element is coupled with or can be coupled with a drive shaft ; wherein the first eccentric shaft element is coupled with the deformable unit to periodically deform the deformable unit so that a longitudinal position of the coupling element of the deformable unit periodically changes, preferably wherein the deformable unit is an integral, single unit; characterized in that the deformable unit comprises a first arm section having a first end and a second end and a second arm section having a first end and a second end, wherein the second end of the first arm section and the first end of the second arm section are connected with each other, wherein the first end of the first arm section is connected with a mounting structure that is fixed relative to the motor and the second end of the second arm section is arranged above the first end of the first arm section in the direction of the longitudinal axis of the motor shaft , preferably wherein the second end of the second arm section is connected with the coupling element ; and in that the drive unit further comprises a linear guide and the second end of the second arm section is coupled with the linear guide so that the second end of the second arm section is essentially confined to a reciprocating linear motion in the direction of the longitudinal axis of the motor shaft when the deformable unit is periodically deformed. <EOS>