An inhaler and a direct current power supply voltage control device with a relatively simple structure that output a predetermined drive voltage according to a specified time interval to a drive object such as a heating resistor. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The ink stick body includes an interlocking face on the first end surface and a complementarily shaped interlocking face on the second end surface. An arrow retention spring is provided for retaining the arrow to the arrow receiving area. The recording of the address information is implemented as follows. The pressing unit may press on the shuttle toward the socket such that the semiconductor package may be electrically connected to the socket pins.