Coupling pin anti-rotation for a switchable roller finger follower

A switchable roller finger follower comprising:

• an inner lever having first and second ends;
• an outer lever having:
• two outer arms that extend along longitudinal sides of the inner lever;
• and,
• a third end mounted for pivoting movement at the first end of the inner lever by a pivot axle;
• a coupling pin arranged to move longitudinally within a coupling pin bore located on one of the inner lever or the outer lever on an end opposite from the pivot axle, the coupling pin having:
• a coupling projection with a first locking surface;
• and,
• a first coupling pin-side anti-rotation flat;
• and,
• an anti-rotation clip arranged on a same one of the inner lever or the outer lever as the coupling pin bore, the anti-rotation clip having a first clip-side finger at a locking end;
• and,
• the coupling pin is moveable from a first, locked position with the first locking surface engaged with a second locking surface located on the other of the inner lever or the outer lever, to a second, unlocked position where the first locking surface is not engaged with the second locking surface, and the first coupling pin-side anti-rotation flat is slidably guided by the first clip-side finger.