| 摘要 |
The key blade (1) has a longitudinal axis (A) of insertion and comprises an elongated, wave-like, longitudinally extending code pattern (38) for co-operation with a locking tumbler (23a-23e)of a rotary cylinder type lock (18). The code pattern comprises a one-sided guiding surface for engagement with a pivotable finger of the locking tumber. - The guiding surface includes at least one concavity location, including a bottom surface portion and adjoining straight side wall portions extending obliquely w.r.t. the longitudinal axis of the key blade, for positioning and supporting the pivotable finger. Sloping surface portions adjoin each of the side wall portions of the concavity location. At least a part of each sloping surface portion is bevelled and oriented so as to face away from the key blade and to enable a smooth, sliding contract with the pivotable finger when the key blade is being inserted into the lock.
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