Medium storage box, financial device, and method of controlling the same

1. A medium storage box, comprising:

a cassette body having a storage space in which a medium is stored;

a cassette door coupled to the cassette body to open or close the storage space;

a door opening detection unit that is configured to generate an open detection signal when the cassette door is opened;

a microcomputer that is configured to determine that the cassette door is opened when the open detection signal is received, and for storing the determined opening information of the cassette door in a cassette memory;

a battery that is configured to supply power to the door opening detection unit and the microcomputer; and

a transistor disposed between the door opening detection unit and the battery,

wherein the transistor is turned on by receiving the open detection signal of the door opening detection unit, and the power of the battery is supplied to the microcomputer when the transistor is turned on, and

wherein the transistor is turned off and the power supply of the battery input to the microcomputer is cut off when the input of the open detection signal of the door opening detection unit is cut off.

2. The medium storage box of claim 1 , wherein the microcomputer stores the opening information of the cassette door in the cassette memory when power is supplied from the battery.

3. The medium storage box of claim 1 , further comprising:

a first detection unit for detecting that the medium storage box is mounted on a financial device; and

a power input unit connected to a power source of the financial device,

wherein the power supplied from the battery is cut off when it is detected that the medium storage box is mounted on the financial device, and power is supplied from the financial device through the power input unit.

4. The medium storage box of claim 3 , further comprising a power source selection unit for supplying power to the microcomputer by selecting either one of the power supplied by the power input unit or the battery.

5. The medium storage box of claim 4 , wherein, the power source selection unit supplies power having a higher voltage between a voltage of the power supplied from the power input unit or a voltage of the battery to the microcomputer.

6. The medium storage box of claim 3 , wherein the battery is charged by the power supplied from the power input unit when the power input unit is connected to the power source of the financial device.

7. The medium storage box of claim 3 , wherein the microcomputer transfers information stored in the cassette memory to the financial device when the first detection unit detects that the medium storage box is mounted on the financial device.

8. The medium storage box of claim 1 , further comprising:

a switch circuit that is turned on based on the open detection signal generated by the door opening detection unit; and

an open signal generation circuit for generating an open signal by the ON operation of the switch circuit,

wherein the open signal is transmitted to the microcomputer.

9. The medium storage box of claim 8 , wherein the microcomputer determines that the cassette door is opened based on the open signal.

10. The medium storage box of claim 8 , further comprising: a signal holding circuit which is connected in parallel to the switch circuit and which receives the open signal and holds the open signal generated by the open signal generation circuit; and a reset circuit for resetting the signal holding circuit.

11. The medium storage box of claim 10 , wherein the reset circuit resets the signal holding circuit when the door opening detection unit detects that the cassette door is closed.

12. The medium storage box of claim 10 , further comprising a first detection unit for detecting that the medium storage box is mounted on a financial device,

wherein the reset circuit resets the signal holding circuit when detected that the first detection unit is mounted on the financial device.

13. The medium storage box of claim 1 , further comprising an open signal generation circuit for generating an open signal by the ON operation of the door opening detection unit,

wherein the open signal is transmitted to the microcomputer.

14. The medium storage box of claim 1 , further comprising at least one of:

a door opening counter for counting the number of door openings detected by the door opening detection unit; and

a timer for counting a door opening time period detected by the door opening detection unit.