Switchable cam follower of a valve train of an internal combustion engine

A switchable cam follower for a valve train of a combustion engine, which a valve-side end and a non-valve-side end with the cam follower rotatable about an axis of rotation at the valve-side end, the cam follower comprising:

• an internal lever having a stop for a gas exchange valve on an underside thereof at the valve-side end of the cam follower, a complementary face for a support element at the non-valve-side end of the cam follower, and a receptacle in which a coupling element is seated at the non-valve-side end of the cam follower;
• an external lever having arms, a start face on an upper side of the arms for at least one high-lift cam, and an attachment extending transverse to the axis of rotation from the upper side of the arms at the non-valve-side end of the cam follower beyond the start face on the upper side of the arms, between the arms, the external lever encompassing the internal lever, the internal lever and the external lever being pivotably moveable relative to one another about the axis of rotation at the valve-side end of the cam follower, and the coupling element of the internal lever being engageable in sections in a first state when coupling with a driving surface of the external lever;
• and
• a lost-motion spring means being clamped between the internal lever and the external lever in a region of the non-valve-side end of the cam follower.