A piezoelectric actuator unit includes a piezoactuator and a casting compound enclosing the piezoactuator. The vegetation is vigorous and the growth habit is rounded and fairly loose. The inner and outer side brackets have respectively harness bosses and harness recesses corresponding to each other to allow the pushbutton to form a lifting position and a lower position in normal conditions. The time information obtaining section changes the time information according to a user’s touch duration on the touch panel and changes an amount of change in time that the time information indicates according to a user’s manner of touching the touch panel.