Flat key used as a turning key comprises a blade having rounded narrow and/or broad sides

摘要

Flat key comprises a head piece (1) and a blade (2). The blade has rounded narrow (3) and/or broad sides (4). The broad side has recesses for sorting the tumbler pins. An independent claim is also included for a molded blank for the flat key having rounded narrow and/or broad sides. Preferred Features: The rounding is formed by a two-dimensional convex curve in the longitudinal and transverse directions of the blade. A guide rib (7) protrudes from the rounding.