S-Shaped Coupling Spring for Middle Ear Implants

A middle ear implant arrangement comprising:

• an implantable electromechanical transducer with an inner end and an outer end connected by a center transducer axis, configured to convert an input electrical stimulation signal into a corresponding output mechanical stimulation signal;
• a cochlear engagement member located at the inner end of the transducer with a cochlear engagement surface configured to couple the mechanical stimulation signal to an outer cochlear surface of a recipient patient;
• and
• a loading spring having:
• i. an inner end that engages the outer end of the transducer,
• ii. an outer end that engages a fixed anatomical structure within the middle ear of the recipient patient;
• and
• iii. a center of mass located on a common line between the inner end and the outer end;
• wherein the loading spring has an s-shape with a central spring axis along the common line, and
• wherein the loading spring is configured for displacement of the inner end and the outer end along the central spring axis so as to fit the loading spring between the transducer and the fixed anatomical structure with a loading force that is within a defined range and entirely along the center transducer axis and the central spring axis.