Portable cassette holder

1. A portable cassette holder, comprising:

a frame detachably coupled to an outer surface of an automated teller machine having a medium entrance, the frame including a frame medium entrance formed at a position corresponding to the medium entrance of the automated teller machine, the frame configured to mount a cassette thereon;

a conveying roller unit coupled to the frame at a location where the frame medium entrance is provided, the conveying roller unit configured to convey a medium passing through the frame medium entrance; and

a power supply connection unit provided in the frame and configured to be electrically connected to the automated teller machine so as to receive electric power;

wherein the frame includes:

a front frame having the frame medium entrance and the conveying roller unit; and

a lower frame rotatably hinged to a lower portion of the front frame and configured to mount the cassette thereon.

2. The portable cassette holder of claim 1 , wherein the power supply connection unit includes:

a first power supply connection part provided on a bottom surface of the lower frame to be inserted into a power supply unit protruding from an outer surface of the automated teller machine so as to receive electric power; and

a second power supply connection part provided on an upper surface of the lower frame to be inserted into a contact terminal portion formed on a bottom surface of the cassette.

3. The portable cassette holder of claim 2 , wherein the lower frame is configured to be supported by the power supply unit.

4. The portable cassette holder of claim 1 , wherein the front frame further comprises a fixing protrusion, which is provided on a front surface of the front frame to be inserted into the automated teller machine.

5. The portable cassette holder of claim 4 , wherein the fixing protrusion is configured to be inserted into a fixing hole formed in the automated teller machine, and a locking groove, into which a hook provided in the fixing hole is to be inserted, is formed on an outer circumferential surface of the fixing protrusion.

6. The portable cassette holder of claim 4 , wherein the fixing protrusion is made of a metal material and configured to be inserted into a fixing hole formed in the automated teller machine, and an electromagnet for selectively fastening the fixing protrusion is provided in the fixing hole.

7. The portable cassette holder of claim 1 , wherein the front frame is provided with a handle on an upper portion thereof, and the handle is obliquely extended upward and rearward from the upper portion of the from frame.