Link 1 rotates about fixed axis D and is connected by turning pair B to gear 2 which meshes with fixed gear 5. Link 4 is connected by turning pair C to gear 2 and its end a slides in slot b of link 3 which turns about fixed axis A. When driving link 1 rotates about axis D, gear 2 rolls around gear 5 and link 3 oscillates about axis A.
$2422$LrG,5L$