A sheet feeding unit according to the invention includes a sheet stacking tray on which the sheet is stacked, a sheet feeding device which feeds the sheet stacked on the sheet stacking tray, and a unit frame which supports the sheet stacking tray and the sheet feeding portion and is attached to a apparatus main body. The multifunctional portable medical measurement device has a first medical measurement unit, a second medical measurement unit, a key unit, a display unit, and a microprocessor. Once possible input entries are determined andor inferred, a rendering component concurrently displays the virtual keys during the input entry. Both the male portion and the female portion include a first ramp between the box hinge portion and the working end.