Inkjet recording apparatus

An inkjet recording apparatus comprising:

• an ink receptacle in which a printing ink for an object to be printed is received;
• a nozzle which is connected to the ink receptacle and from which the ink fed under pressure is discharged;
• an electrification electrode to subject the ink discharged from the nozzle to electrification;
• deflection electrodes to make the ink subjected to the electrification by the electrification electrode deflect;
• a gutter to recover the ink unused for the printing;
• and
• an electric charge detection section to detect an amount of electric charge in accordance with the electrification between the electrification electrode and the deflection electrodes,
• wherein the electric charge detection section is formed with an insulator between a sensor for electric charge detection and an ink beam discharged from the nozzle;
• and the sensor for electric charge detection is fixed in a state where the sensor makes contact with the insulator.

An inkjet recording apparatus comprising:

• an ink receptacle in which a printing ink for an object to be printed is received;
• a feeding pump which suctions the ink through a piping from the ink receptacle and feeds the ink under pressure to a nozzle to discharge the ink;
• a pressure regulating valve which is disposed between the feeding pump and the nozzle and adjusts pressure applied to the ink within a piping path;
• a pressure sensor to detect the pressure applied to the ink;
• an electrification electrode to subject the ink discharged from the nozzle to electrification;
• deflection electrodes to make the ink subjected to the electrification by the electrification electrode deflect;
• a gutter to recover the ink unused for the printing;
• and
• an electric charge detection section to detect an amount of electric charge in accordance with the electrification,
• wherein the pressure regulating valve is provided with a pressure adjustment shaft, a pressure adjustment shaft gear integrally rotating with the pressure adjustment shaft, a driving gear disposed in a state where the driving gear is engaged with the pressure adjustment shaft gear, and a driving motor for rotating the driving gear.