Patent ID: 9175715
Filing Date: 2015-11-03
Classification: F16B,Y10T

Abstract:
1. A functional element ( 12 ) being one of a rivet element and a press-in element, the functional element having a shaft part ( 14 ), a head part ( 16 ), an annular sheet metal contact surface ( 20 , 24 ) which surrounds the shaft part, and a plurality of uniformly distributed features ( 32 ) providing security against rotation which are provided at the annular sheet metal contact surface ( 20 , 24 ), each feature ( 32 ) providing security against rotation consisting of a recess ( 31 ) having a boundary ( 37 ) provided in the sheet metal contact surface ( 20 , 24 ) of the functional element ( 12 ) and of a raised portion ( 33 ) having the shape of an elongate rib and a rounded apex and being arranged substantially centrally in the likewise elongate recess ( 31 ), wherein the recess ( 31 ) surrounds the raised portion ( 33 ) in the shape of a horseshoe, an end of the horseshoe directed away from the shaft part ( 14 ) splitting into two regions directed toward the shaft part ( 14 ) on both sides of the rib-like raised portion ( 33 ), the annular sheet metal contact surface ( 20 , 24 ) lying in a local plane (E) in a region of and around the features ( 32 ) providing security against rotation and the volume of the raised portion ( 33 ) projecting beyond this local plane (E) or one side thereof substantially corresponding to the volume of the recess ( 31 ) at the other side of the plane (E).