To provide a cylinder lock protection device capable of maintaining operability and suppressing the protrusion of an operating knob from a surface of a housing.
This cylinder lock protection device, which can protect the cylinder lock, comprises: the housing 1 which is provided above a keyhole of the cylinder lock; a shutter 2 which can move between closing and opening positions by rotating in the housing 1, and which opens and closes the keyhole (a); the operating knob 4 which enables the shutter 2 to be operated from the opening position to the closing one; a locking means 3 for locking the shutter 2 in the closing position; and a magnet key MK capable of releasing the state of locking the shutter 2 by the locking means 3. In the cylinder lock protection device, a recess 5 is formed on the surface of the housing, and the operating knob 4 is protrusively formed in the recess 5 and set operable.
HAKAMADA MIKA
OTAKA MITSUMASA
JP3431585B2 | 2003-07-28 | |||
JP2003064912A | 2003-03-05 |
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