Patent ID: 7150168

Claim:
A tubular lock unit comprising: a lock having a hollow cylinder with a hole in an end; a lower pin seat securely mounted in the cylinder and having multiple lower pin openings defined evenly and radially therein; an upper pin seat mounted rotatably in the cylinder and abutting an upper end of the lower pin seat and having an annular keyway defined axially in an upper end thereof, a slot defined radially in an outer sidewall and in communication with the keyway, and multiple upper pin openings defined evenly and radially in a sidewall of the keyway corresponding to the lower pin openings in the lower pin seat; multiple lower pins inserted into the lower pin openings; multiple upper pins inserted into the upper pin openings; and a shaft inserted into the lower pin seat and connected to the upper pin seat; and a key corresponding to the lock and having a barrel corresponding with the keyway and having a lug mounted longitudinally in a sidewall thereof, and a protrusion formed on an end of the lug and extending downward wherein when the protrusion is inserted into the slot, a lower end of the protrusion meets with an upper end of the lower pin seat.