Patent ID: 8360224

Claim:
An automatic teller machine (ATM), comprising: a body to process depositing or withdrawing of a paper medium; a cassette being slidably attached to and detached from the body, and comprising a rotatable cassette coupler formed on one side of the cassette to receive a power from the body, and to internally receive the paper medium; a receiving unit being formed within the body to install the cassette, and comprising a rotatable body coupler being combined with the rotatable cassette coupler when installing the cassette to thereby transfer the power from the body to the cassette; and a combining unit being formed on each of the rotatable body coupler and the rotatable cassette coupler so that a rotation center line of the rotatable body coupler and a rotation center line of the rotatable cassette coupler are matched on the same axial line of the rotatable body coupler and the rotatable cassette coupler to thereby combine the rotatable body coupler and the rotatable cassette coupler, wherein the cassette comprises: a first guide unit being formed on one side of the cassette along a direction of the cassette attached to and detached from the body to thereby guide a sliding motion of the cassette when the cassette is attached to or detached from the body; and a second guide unit being formed on one side of the cassette to maintain an engaged state when the cassette is mounted to the body, wherein the second guide unit comprises a plurality of receiving grooves being formed along a slide direction of the cassette, and the receiving unit comprises an elastic member to be engaged with the receiving grooves when the cassette is received within the receiving unit, and wherein the receiving grooves are disposed in two diagonal areas out of four areas defined by a vertical line and a horizontal line with respect to a bottom surface of the second guide unit crossing at a center of the second guide unit.