Patent ID: 8517378

Claim:
A media transfer device of an automatic teller machine (ATM), the media transfer device comprising: a first transfer portion supporting one surface of a paper medium, the first transfer portion comprising a first transfer frame configured to rotatably mount first transfer rollers and a first transfer belt mounted on the first transfer roller to rotate in one direction; a second transfer portion comprising: a rotation frame facing the first transfer portion and supporting another surface of the paper medium to transfer the paper medium in conjunction with the first transfer portion in an engaged state, a support frame rotatably supporting the rotation frame, second transfer rollers mounted to the rotation frame or the support frame, and a second transfer belt mounted to the second transfer rollers to rotate in another direction and engaging the first transfer belt in the engaged state, tension of the second transfer belt causing the rotation frame to rotate into a disengaged state for removing a jammed paper medium; an opening and closing portion mounted to the second transfer portion and enabling rotation of the rotation frame of the second transfer portion between the engaged state and the disengaged state, the opening and closing portion comprising: a rotation shaft rotatably mounted to the support frame, a rotation cam mounted to the rotation shaft, the rotation cam configured to contact a roller member of the rotation frame and cause the rotation frame to rotate based on a rotation angle of the rotation shaft, a knob at one end of the rotation shaft, the knob comprising a grip portion at the end of the rotation shaft to rotate the rotation shaft and a guide portion formed in the grip portion to guide rotating of the rotation shaft, and an elastic member mounted to the rotation frame and the support frame to exert force in a direction of moving the rotation frame into the disengaged state; and a locking portion at one side of the opening and closing portion to lock the second transfer portion in the engaged state, the locking portion comprising a guide protrusion formed in a housing to receive the first transfer portion and the second transfer portion, and a guide hole with a predetermined length is formed in the guide portion for receiving the guide protrusion to limit a rotatable angle of the rotation shaft.