Ink jet recording device and head unit

摘要

An ink jet recording device having a capability of detecting the life of an ink jet recording head. The ink jet recording device includes a size sensor for generating a paper size signal relating to a size of a printing paper; a detecting device for detecting the number of print scans of the recording head; a converting device for counting the number of print scans detected by the detecting device without correction when the size of the printing paper is a predetermined paper size and for converting the number of print scans detected by the detecting device into the number of print scans corresponding to the predetermined paper size to count the converted number of print scans when the size of the printing paper is any size other than the predetermined paper size; an accumulating device for accumulating the number of print scans counted by the converting device; and a memory for storing the number of print scans accumulated by the accumulating device. The ink jet recording device further includes an informing device for informing the number of print scans accumulated by the accumulating device. Accordingly, the expiration of the life of the recording head can be easily and reliably predicted.