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US 2024/0410197 A1Published application
Locking device, unlocking key, and door
AssigneeLIXIL Corporation
InventorsFuminori AKIYAMA, Takashi MITSUHASHI
Life of this patent
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Abstract
Provided is a locking device that allows a plurality of cylinder locks having different security levels to be locked and unlocked with the same unlocking key. A locking device comprising: a cylinder lock having an outer cylinder, and an inner cylinder that is rotatably fit with the outer cylinder; and an unlocking key corresponding to a key hole formed in the inner cylinder, wherein a projecting part is formed at the back end of the key hole, and a positioning recess part that can be fit with the projecting part is formed at the front end of the unlocking key.
Claims18
A locking device, comprising:
- a cylinder lock including an outer cylinder and an inner cylinder that rotatably engages with the outer cylinder;
- and
- an unlocking key corresponding to a keyhole formed in the inner cylinder, wherein
- a protrusion is formed at an end of the keyhole, and
- a positioning indentation engageable with the protrusion is formed at a tip of the unlocking key.
2 more elements
Dependencies are inferred from the claim text.