FASTENING DEVICE FOR FASTENING TO A PLATE-LIKE ELEMENT

A fastening device (100), for fastening to a plate-like element, has a head (110) and a foot (120). The foot (120) has: a core (121) extending from the head (110) along an axis of rotation; and at least one group of blades (122) which are elastic at least in regions and extend outwards from the core (121). Each of the blades (122) has an oblique shoulder (123) or a shoulder with a finely stepped gradation, formed on the outer edge of the corresponding blade (122), said outer edge being arranged towards the head (110). The oblique shoulder (123) or the individual steps of the gradation of the shoulder is inclined with a slope with respect to a plane which has the axis of rotation of the core as a perpendicular. The shoulders (123) of the blades are arranged at different heights from one another along the axis of rotation. 一种用于紧固到板状元件的紧固装置(100)具有头部(110)和脚部(120)。所述脚部(120)具有：芯部(121)，所述芯部沿着旋转轴线从所述头部(110)延伸；以及至少一组叶片(122)，所述叶片至少在区域中是弹性的并且从所述芯部(121)向外延伸。所述叶片(122)中的每个叶片具有倾斜肩台(123)或具有精细台阶状渐变部的肩台，所述倾斜肩台或具有精细台阶状渐变部的肩台被形成