Sheet end detection device, image recording apparatus including the sheet end detection device, and a method for detecting position of sheet

A sheet end detection device comprising:

• a cylindrical roller rotatable around an axis with conveying of a sheet to be conveyed in a state in which a peripheral surface of the roller contacts one face of the conveyed sheet;
• and
• a phase detection unit configured to detect a phase in a circumferential direction of the roller,
• wherein a first piezoelectric element band is provided on the peripheral surface of the roller and extending in the circumferential direction and the axial direction, the first piezoelectric element band being configured to detect a contact of the sheet and extending in an axial direction of the roller over an inside and an outside of a contact area to be contacted with the conveyed sheet on the peripheral surface, and
• wherein a position of an arbitrary point of the first piezoelectric element band in the axial direction of the roller corresponds one-to-one with the phase in the circumferential direction of the roller.