Device for fastening a window blind

A process for using a device for fastening a window blind and/or window blind end piece, the process comprising the steps of:

• providing a fastening device comprising a front surface, a mounting element, an axis segment arranged on the front surface, the axis segment interacting with the mounting element, which can be rotated about an axis of rotation of the axis segment, for opening and/or closing a holding mount, an axial guide fixing an axial position of the mounting element in relation to the axis of rotation of the mounting element about the axis segment and a positioning means, which is separate from the axial guide, for detachable fixing of the mounting element in at least one rotation position of the mounting element in relation to the axis segment said positioning means comprising a locking block arranged on a circumferential surface of the axis segment, wherein at least one of the locking block comprises a raised section extending in an outwards direction in relation to the circumferential surface of the axis segment and the locking block is arranged on a side of the axis segment turned away from the holding mount;
• selectively employing the mounting element, fastened to the axis segment by means of the axial guide, for a right-sided or left-sided mounting for mounting a holding segment in the holding mount, based on a rotation of the mounting element about the axis segment.

A window blind end piece fastening device comprising:

• a front surface;
• a mounting element;
• an axis segment arranged on said front surface, said axis segment having an outer circumferential surface defining a rotation surface in contact with an inner surface of said mounting element for rotation of said mounting element about an axis of rotation of said axis segment, and outer circumferential surface at least partially defining a holding mount;
• an axial guide fixing an axial position of said mounting element in relation to said axis of rotation of said mounting element about said axis segment;
• and
• a positioning structure separate from said axial guide, for detachable fixing of said mounting element in at least one rotation position of said mounting element in relation to said axis segment, said positioning means comprising an outer surface locking contour defined by said outer circumferential surface, wherein at least one of said outer surface locking contour comprises a raised section extending in an outwards direction in relation to an adjacent portion of said outer circumferential surface and said locking contour is arranged on a side of said axis segment turned away from said holding mount.