Middle-distance springing device for automatic correction of angle error has limiting elements set so that at least one on either side is in plane perpendicular to central axis

摘要

The springing device (1) includes an upper structure (2) and a lower structure (3); an elastic body (4), and three or more limiting elements (5). The limiting elements are set so that at least one of them on either side of a straight line running through the central axis (C) is in a plane perpendicular to the central axis.