Ultrasonic wave guiding unit for use in ultrasonic beauty stimulator, has guidance cover with ring-shaped cavity arranged in inner surface of front plate and around guidance surface to form non-continuous zone, which is filled with air

摘要

The unit has an ultrasonic wave production plate and a guidance cover (20) with a front plate and a flat guidance surface, which extends perpendicularly from an inner surface of the plate. The cover has a ring-shaped cavity (26) arranged in the inner surface and around the guidance surface to form a non-continuous zone, which is filled with air. The plate borders the guidance surface, and the cover has a thin dead plate.