The present invention relates to a handle assembly (100) for an implant delivery device for folding or unfolding at least one medical implant by means of at least one tension thread, wherein the handle assembly (100) comprises a drum (14) for winding the tension thread thereon by rotating the drum (14)； a knob (9) to be rotated by a user of the handle assembly (100) in order to fold or unfold the medical implant by tightening or winding the tension thread or by releasing or unwinding the tension thread, the knob (9) being arranged or interconnected with the drum (14) such that the drum (14) may be rotated when the knob (9) is rotated； and a brake frame assembly (25) comprising at least one brake element and at least one spring (256, 257) arranged to act on the brake element such that the brake elements contact one surface of the rear knob (9).
