Guide rail for driving element

The guide rail may be straight or curved and accommodates a slider or fastening (4) at the end. A drive cable (19) is accommodated in a central channel (8) in the rail. The channel has alternating U-section portions (9) and sections open at the bottom and with a narrow slit (14) at the top. The side walls of the channel incline inwards (10) towards the narrow slit in these regions. The sides of the U-section guide rail (6) are short with respect to the flat bottom, and there are outward-extending flanges (7) at the top.