Gravity rotary unit e.g. for ornament has component with inner oblique ribs interacting with spiral section of vertical shaft

摘要

The unit consists of a first component (1) with a vertical shaft (2) having a pointed tip (5) and an intermediate spiral section (8), and a second component (3) with a blind socket (4) and inner oblique ribs (16) interacting with the spiral section of the shaft. The ribs are designed to form a polygonal structure shaped to engage with the spiral section, causing the second component to rotate as it slides down the outer surface of the first one.