Voice prosthesis

摘要

A rigid body (10) with sealing grooves (9) and a valve flap protection chamber (11) is made from a hard material and flexible valve flap (1) is mounted or injection-moulded onto it via a slit (12). Umbrella-like upper and lower flanges (3, 4) are injection-moulded onto the rigid body. The upper flange is located at one end of the body and the lower flange is located at the other end and surrounded by a protective ring (5). The valve flap can only be opened in one direction and cooperates with sealing grooves in order to block a cylindrical passage (7) through the body. The lower flange is made from an elastic material and the upper flange is made from a very flexible material.