Cylinder lock and door
AssigneeLIXIL Corporation
InventorsFuminori Akiyama, Takashi Mitsuhashi
Life of this patent
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Abstract
A cylinder lock is disclosed that is capable of preventing a driver pin from falling over inside a pin hole even when the driver pin has been shortened. The cylinder lock comprises an outer cylinder and an inner cylinder that rotatably fits into the outer cylinder. The outer cylinder and the inner cylinder each have a hole formed therein which connects to a key hole and into which the driver pin can be inserted. The diameter of the outer cylinder side of the driver pin is greater than the diameter of the inner cylinder side of the driver pin. An orientation-maintaining region having a prescribed length in the axial direction and a fixed diameter is preferably provided at the outer cylinder-side end of the driver pin.
Claims9
A cylinder lock, comprising:
- an outer cylinder;
- and
- an inner cylinder rotatably engaging with the outer cylinder, wherein
- a hole is formed in the outer cylinder and the inner cylinder, in which the hole communicates with a keyhole, and a driver pin and a tumbler pin can be inserted through the hole,
- the driver pin includes a posture maintaining region on a side of the outer cylinder,
- the driver pin includes a communication region on a side of the inner cylinder,
- a diameter of the posture maintaining region is larger than a diameter of the communication region,
- a sum of an axial length of the driver pin and an axial length of the tumbler pin is not more than twice the diameter of the posture maintaining region, and
- the diameter of the posture maintaining region is substantially equal to a hole diameter of the hole formed in the outer cylinder.
Dependencies are inferred from the claim text.