| 摘要 |
A cylinder lock in which at least one tumbler assembly includes a pin tumbler supported for rotational movement about its axis within a tumblerway, a driver, and a coupling mechanism releaseably coupling the driver to the pin tumbler for rotational movement of the driver about its axis in response to said rotational movement of the pin tumbler. The coupling mechanism at least partially defines a split line along which the pin tumbler and the driver may separate when the one tumbler assembly is axially and rotationally positioned relative to a plug and a shell in a predetermined releasing position wherein the split line is aligned with a shear line between the plug and the cylinder, and the pin tumbler has means for positioning the one pin tumbler assembly in the releasing position in response to engagement with a proper key in a keyway through the plug. A cavity is defined by the plug and is arranged to receive a portion of the coupling mechanism during relative movement of the plug out of a locked position, and a driver limit limits rotational movement of the driver in the tumblerway.
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