FIELD: construction.
SUBSTANCE: one of two side planes has three control grooves, and at least one of control grooves is arranged as deeper compared to other control grooves. Two shallow grooves are arranged as approximately parallel. Flat key has additional control elements, such as recesses at barb for locking units. Recesses consist of coding pin, locking pin and spring. Control planes on back side of key, longitudinal ribs and grooves in direction of key insertion and milled slots on side surfaces. Both shallow grooves, at the section that starts from key tip and including the first fixed position for control element, have larger width compared to width further along shallow grooves.
EFFECT: invention makes it possible to improve properties of key versions and to provide for reliability of blocking.
5 cl, 8 dwg
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