Blind rivet element
A blind rivet element has a head portion and a shank adjacent to the head portion in an axial direction. The shank has an internal thread or a connecting portion for a threaded bolt and a deformation portion between the internal thread or the connecting portion for the threaded bolt and the head portion for forming a closing head when the deformation portion is deformed. The head portion has a radially outer region formed spaced apart from the shank in a radial direction. The head portion has at least one first protrusion protruding in the axial direction formed exclusively in the radially outer region of the head portion, and/or the head portion has at least one second protrusion protruding counter to the axial direction formed exclusively in the radially outer region of the head portion.
1 . A blind rivet element having a head portion and a shank adjacent to the head portion in an axial direction, wherein the shank has an internal thread or a connecting portion for a threaded bolt, and a deformation portion between the internal thread or the connecting portion for the threaded bolt and the head portion for forming a closing head when the deformation portion is deformed, wherein the head portion has a radially outer region formed spaced apart from the shank in a radial direction, wherein the head portion has at least one first protrusion formed exclusively in the radially outer region of the head portion, and wherein the head portion has at least one second protrusion formed exclusively in the radially outer region of the head portion, wherein the blind rivet element has a plurality of first protrusions protruding in an axial direction from a first side of the head portion and a plurality of second protrusions protruding counter to the axial direction from a second side of the head portion opposite the first side, wherein the plurality of first protrusions and the plurality of second protrusions are formed on a respective side of the head portion in an encircling direction about an axis formed in the axial direction, and wherein the plurality of first protrusions and the plurality of second protrusions are formed in an alternating manner and separated by a recess on the respective side of the head portion in the encircling direction.
2 . The blind rivet element according to claim 1 , wherein a radial distance between the respective protrusion and the shank is at least 50% of a radial distance between an outer edge of the head portion and the shank.
3 . The blind rivet element according to claim 2 , wherein the at least one first protrusion and/or the at least one second protrusion are/is formed on the outer edge of the head portion.
4 . The blind rivet element according to claim 1 , wherein the at least one first protrusion and/or the at least one second protrusion are/is formed by local deformation of a region of the head portion.
5 . The blind rivet element according to claim 1 , wherein the at least one first protrusion and/or the at least one second protrusion have/has a protruding cutting edge and/or a protruding point.
6 . The blind rivet element according to claim 5 , wherein the cutting edge extends substantially in the radial direction.
7 . The blind rivet element according to claim 5 , wherein the at least one first protrusion and/or the at least one second protrusion have/has a first cutting face and a second cutting face which is inclined with respect to the first cutting face, wherein a contact line of at least one of the first cutting face and the second cutting face forms the cutting edge of the protrusion.
8 . The blind rivet element according to claim 7 , wherein the first cutting face encloses a first angle with a plane formed perpendicularly to the axial direction and the second cutting face encloses a second angle with said plane, wherein the value of the second angle is smaller than the value of the first angle, and wherein the second cutting face faces the recess.
9 . The blind rivet element according to claim 1 , wherein the head portion has a greater extent in the axial direction in the region of the first protrusion and/or in the region of the second protrusion than in adjacent regions of the head portion.
10 . The blind rivet element according to claim 1 , wherein both the at least one first protrusion and the at least one second protrusion are formed on the outer edge of the head portion.
11 . The blind rivet element according to claim 1 , wherein both the at least one first protrusion and the at least one second protrusion are formed by local deformation of a region of the head portion.
12 . The blind rivet element according to claim 1 , wherein all of the head portion, the shank, the at least one first protrusion and the at least one second protrusion are integrally formed.
13 . The blind rivet element according to claim 1 , wherein the shank has an internal thread.
14 . The blind rivet element according to claim 1 , wherein during use each of the plurality of first protrusions and the plurality of second protrusions are positioned and configured for extending into a component in which the blind rivet element is used.
15 . A blind rivet element having a head portion and a shank adjacent to the head portion in an axial direction and extending in a shank-extending direction, wherein the shank has an internal thread or a connecting portion for a threaded bolt, and a deformation portion between the internal thread or the connecting portion for the threaded bolt and the head portion for forming a closing head when the deformation portion is deformed, wherein the head portion has a radially outer region formed spaced apart from the shank in a radial direction, wherein the head portion has at least one first protrusion formed exclusively in the radially outer region of the head portion, and wherein the head portion has at least one second protrusion formed exclusively in the radially outer region of the head portion, wherein the blind rivet element has a plurality of first protrusions protruding in a first direction that is parallel to the shank-extending direction and from a first side of the head portion and a plurality of second protrusions protruding in a second direction that is parallel to the shank-extending direction opposite the first direction and from a second side of the head portion opposite the first side, wherein the plurality of first protrusions and the plurality of second protrusions are formed on a respective side of the head portion in an encircling direction about an axis formed in the axial direction, and wherein the plurality of first protrusions and the plurality of second protrusions are formed in an alternating manner and separated by a recess on the respective side of the head portion in the encircling direction.
16 . The blind rivet element according to claim 15 , wherein during use each of the plurality of first protrusions and the plurality of second protrusions are positioned and configured for extending into a component in which the blind rivet element is used.
17 . The blind rivet element according to claim 15 , wherein both the at least one first protrusion and the at least one second protrusion are formed by local deformation of a region of the head portion.
18 . The blind rivet element according to claim 15 , wherein all of the head portion, the shank, the at least one first protrusion and the at least one second protrusion are integrally formed.