Pressure adjustment chamber, ink-jet recording head having the same, and ink-jet recording device using the same

A recording head including:

• an ink discharging unit for discharging ink for recording,
• an ink container for containing air and ink supplied to the ink discharging unit, and
• a pressure adjustment chamber communicated with the ink container and having at least one elastic transformation body having a changeable volume according to vapor pressure to adjust the vapor pressure in the ink container and a support for supporting the elastic transformation body to the ink container,
• wherein the elastic transformation body includes an approximately circular opening and two surfaces approximately flat before transformation at an outer circumference, in which the two surfaces have a shape extended through a curved portion at a front end opposite to the opening.

A recording head including:

• an ink container having a plurality of ink containing chambers arranged in parallel, each of which independently containing ink,
• an ink discharging unit for discharging ink supplied from the ink container for recording, each of the ink discharging unit corresponding to each ink containing chamber, and
• a pressure adjustment device installed corresponding to each ink containing chamber for adjusting pressure in the ink container,
• wherein the pressure adjustment device is arranged over upper portions of at least two ink containers, and the pressure adjustment device includes a plurality of elastic transformation bodies arranged to an arrangement direction of the ink containing chambers and a direction crossing the arrangement direction.