Key cylinder
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United States of America Patent
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-
Jan 6, 2009
Grant Date -
Oct 11, 2007
app pub date -
Apr 4, 2007
filing date -
Apr 10, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
In a key cylinder a stopper plate is pressed into an imposing hole of a rotor, latching to a body and also intruding into engagement grooves of a second sleeve. When an authentic key is inserted into the rotor and rotated, a first sleeve is not rotated, and a second sleeve is rotated through the stopper plate. When a false key is inserted into the rotor the first sleeve rotates and the second sleeve is slid to the rear by slide bars, therefore the stopper plate separates from the engagement grooves, and the second sleeve is not rotated. The stopper plate has the function of being able to stop the movement of the rotor in the forward-rearward direction, and also the function of making the second sleeve rotatable by the rotation of the rotor, and so the construction of the key cylinder is simplified.
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