Patent ID: 7478846

Claim:
A door lock device, comprising: a structure including: a housing having an opening on one side of the housing configured to accommodate a latch supported by a latch shaft penetrating through the structure; a ratchet supported by a ratchet shaft penetrating through the structure, the ratchet shaft having a flange collar at a base end of the ratchet shaft; a cover plate configured to cover the opening; a base plate on another side of the housing such that the housing is sandwiched between the base plate and the cover plate; and a ratchet lever supported by the ratchet shaft and configured to rotate integrally with the ratchet, wherein the ratchet shaft includes a first stepped portion having a first end next to the base end, and a second end, the first stepped portion rotatably supporting the ratchet lever; and a second stepped portion receiving a thickness of the base plate, with the base plate contacting the second end of the first stepped portion, the second stepped portion having a diameter different than the first stepped portion, and the second stepped portion is configured to be caulked to the base plate with the first stepped portion through the ratchet lever and the second stepped portion through the base plate.