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Title:
CYLINDER LOCK PROTECTION DEVICE
Document Type and Number:
Japanese Patent JP2009228283
Kind Code:
A
Abstract:

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.


Inventors:
HASHIMOTO AKIHIRO
HAKAMADA MIKA
OTAKA MITSUMASA
Application Number:
JP2008074283A
Publication Date:
October 08, 2009
Filing Date:
March 21, 2008
Export Citation:
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Assignee:
ASAHI DENSO CO LTD
International Classes:
E05B15/00; E05B17/18; E05B35/12; E05B47/00; E05B83/00; E05B85/02
Domestic Patent References:
JP3431585B22003-07-28
JP2003064912A2003-03-05
Attorney, Agent or Firm:
Takao Koshikawa