| 摘要 |
A key for use in an inline pin tumbler cylinder assembly comprises a bow 1 and a blade 2, the blade including a plurality of notched regions each for engaging a respective tumbler pin 3. At least one of the notched regions is provided at its base with a recessed portion 201 suitable for engagement by a respective inner pin 31 of a telescopic tumbler pin assembly, the telescopic tumbler pin assembly further comprising an outer pin in which the inner pin is slidably mounted. The recessed portion may comprise a cavity of substantially circular cross-section, with walls which are inclined at an angle of between 60 and 90 degrees to the longitudinal axis of the blade. The key may further comprise a projecting portion 23 at the base of at least one of the notched regions, suitable for engaging a respective inner pin of a telescopic tumbler pin assembly. The projecting portion may be in the shape of a frusto-conical dome. A key blank from which the key can be cut is also disclosed. |
