Medical-grade actuator having a modular structure and medical device comprising same

A medical device comprising an actuator and an artificial contractile device comprising a contractile element and a flexible transmission,

• said actuator comprising an electromotor, a mechanical transmission, and magnetic coupling means arranged for transmitting a mechanical torque from the electromotor to the mechanical transmission when said electromotor is powered by an energy source, wherein said electromotor and a first part of the magnetic coupling means kinematically linked to the electromotor are encased and hermetically sealed in a first casing module, and wherein said mechanical transmission and a second part of the magnetic coupling means kinematically linked to said mechanical transmission are encased in a second casing module which is separate from the first casing module, said first and second casing modules comprising each complementary fastening means such that said first and second casing modules can be removably connected to each other in such a way that said first and second parts of the magnetic coupling means magnetically couple together upon connection of said first and second casing module,
• said flexible transmission being connectable to the mechanical transmission in the second casing module of the actuator.