Medium sensing apparatus and financial device for identifying authenticity of media using a contact image sensor

1. A medium sensing apparatus comprising:

single first frame disposed on a transfer path of a medium, the single first frame having a plurality of first sensor grooves, wherein a first contact image sensor is insertable in each of the plurality of first sensor grooves, the first contact image sensor being a reflective contact image sensor or a transmissive contact image sensor, the plurality of first sensor grooves being arranged to be spaced apart from each other in a transfer direction of the medium;

single second frame facing the single first frame, the single second frame having a plurality of second sensor grooves, wherein a second contact image sensor is insertable in each of the plurality of second sensor grooves, the second contact image sensor being a reflective contact image sensor or a transmissive contact image sensor, the plurality of second sensor grooves being arranged to be spaced apart from each other in the transfer direction of the medium;

a plurality of first contact image sensors disposed in the plurality of first sensor grooves, respectively; and

a plurality of second contact image sensors disposed in the plurality of second sensor grooves, respectively;

wherein at least one of the plurality of first sensor grooves and at least one of the plurality of second sensor grooves are disposed to partially overlap with each other, and

wherein a distance between two adjacent first sensor grooves of the plurality of first sensor grooves is different from a distance between two adjacent second sensor grooves of the plurality of second sensor grooves.

2. The medium sensing apparatus of claim 1 , wherein one or more of the plurality of first sensor grooves and one or more of the plurality of second sensor grooves are disposed to partially overlap with each other, and

the others of the plurality of first sensor grooves and the others of the plurality of second sensor grooves are disposed to entirely overlap with each other.

3. The medium sensing apparatus of claim 1 , wherein at least one first contact image sensor disposed in at least one first sensor groove is point symmetric to at least one second contact image sensor disposed in at least one second sensor groove overlapping with the at least one first sensor groove.

4. The medium sensing apparatus of claim 1 ,

wherein when the plurality of first contact image sensors and the plurality of second contact image sensors are reflective contact image sensors, light emitted from light emitting parts of the first contact image sensor and the second contact image sensor is reflected to light receiving parts of the first contact image sensor and the second contact image sensor, respectively.

5. The medium sensing apparatus of claim 4 , wherein two adjacent first sensor grooves of the plurality of first sensor grooves are disposed axisymmetrically to each other, or

two adjacent second sensor grooves of the plurality of second sensor grooves are disposed axisymmetrically to each other.

6. The medium sensing apparatus of claim 1 ,

wherein, when the plurality of first contact image sensors and the plurality of second contact image sensors are transmissive contact image sensors where light is transmitted through a surface of the medium to sense the medium with a image where images of front and rear surfaces of the medium overlap with each other, one of the first and second contact image sensors comprises a light emitting part and the other of the first and second contact image sensors comprises a light receiving part disposed to face the light emitting part.

7. The medium sensing apparatus of claim 4 , wherein one of the light emitting parts is disposed in one first sensor groove of the plurality of first sensor grooves, and one of the light receiving parts is disposed in one second sensor groove of the plurality of second sensor grooves overlapping with the one first sensor groove; and

another of the light receiving parts is disposed in another first sensor groove of the plurality of first sensor grooves, and another of the light emitting parts is disposed in another second sensor groove overlapping with the another first sensor groove.

8. The medium sensing apparatus of claim 1 , wherein a reflective contact image sensor is disposed in one first sensor groove of the plurality of first sensor grooves, and the reflective contact image sensor is disposed in one second sensor groove overlapping with the one first sensor groove; and

a transmissive contact image sensor is disposed in another first sensor groove of the plurality of first sensor grooves, and a transmissive contact image sensor is disposed in another second sensor groove overlapping with the another first sensor groove.

9. A financial device comprising:

a main body;

a medium entrance through which a medium is put in and taken out, the medium entrance being provided at the main body;

a medium storage part to store the medium put through the medium entrance; and

a medium sensing apparatus comprising a single first frame and a single second frame to receive the medium, the single first frame and the single second frame disposed within the main body, the single first frame having a plurality of first sensor grooves above the medium to be received, wherein a first contact image sensor is insertable in each first sensor groove, the first contact image sensor being a reflective contact image sensor or a transmissive contact image sensor, and the single second frame having a plurality of second sensor grooves below the medium to be received, wherein a second contact image sensor is insertable in each second sensor groove, the second contact image sensor being the reflective contact image sensor or a transmissive contact image sensor;

wherein the plurality of the first sensor grooves are arranged to be spaced apart from each other in a transfer direction medium;

wherein the plurality of second sensor grooves are arranged to be spaced apart from each other in the transfer direction of the medium;

wherein the first contact image sensor is received in one first sensor groove of the plurality of first sensor grooves;

wherein the second contact image sensor is received in one second sensor groove of the plurality of second sensor grooves, and

wherein a distance between two adjacent first sensor grooves of the plurality of first sensor grooves is different from a distance between two adjacent second sensor grooves of the plurality of second sensor grooves.

10. The financial device of claim 9 ,

wherein each of the first and second contact image sensors comprises a transmissive contact image sensor sensing light transmitted through a surface of the medium to sense the medium with an image where images of front and rear surfaces of the medium overlap with each other and the transmissive contact image sensors are disposed to partially overlap with each other; and

wherein one of the first and second contact image sensors comprises a light emitting part and another of the first and second contact image sensors comprises a light receiving part disposed to face the light emitting part.

11. The financial device of claim 9 , wherein contact image sensors of the first contact image sensor and the second contact image sensor comprise a plurality of contact image sensor types and are disposed in predetermined positions of the partially overlapped first sensor groove and second sensor groove, respectively; and

wherein different types of the contact image sensors are disposed in different predetermined positions.

12. The financial device of claim 9 , wherein the first and second sensor grooves are disposed to partially overlap with each other; wherein each of the first and second contact image sensors comprises a reflective contact image sensor that reflects light from a surface of the medium to sense the medium with the reflected light; and

wherein each of the reflective contact image sensors comprises a light emitting part emitting light onto the surface of the medium and a light receiving part receiving light reflected by the surface of the medium, the light emitting parts of the first and second contact image sensors being disposed in a space between the light receiving part of the first contact image sensor and the light receiving part of the second contact image sensor.

13. The financial device of claim 9 , wherein a portion of the single first frame having the plurality of first sensor grooves is symmetrically rotatable to a position of the single second frame having the plurality of second sensor grooves.