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Ink jet head and ink jet printer

A technology of inkjet head and ink, which is applied in printing and other directions, and can solve problems such as ink electrolysis

Active Publication Date: 2017-08-08
TOSHIBA TEC KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In an inkjet head where the ink is in direct contact with the electrodes, ink electrolysis sometimes occurs due to the voltage applied to the electrodes

Method used

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  • Ink jet head and ink jet printer
  • Ink jet head and ink jet printer
  • Ink jet head and ink jet printer

Examples

Experimental program
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Embodiment Construction

[0017] Embodiments will be described below with reference to the drawings.

[0018] The inkjet printer of the embodiment ejects ink stored in an ink cartridge to a printing medium (for example, paper) to form an image on the printing medium. An inkjet printer applies a voltage to a piezoelectric element forming a pressure chamber inside an inkjet head, and ejects ink from the pressure chamber.

[0019] figure 1 It is a diagram showing a configuration example of the inkjet printer 1 .

[0020] The inkjet printer 1 includes a plurality of inkjet head units 10 and ink cartridges respectively corresponding to the plurality of inkjet head units 10 . In addition, the inkjet printer 1 includes a head supporting portion 40 that movably supports a plurality of inkjet head units 10 , a printing medium moving portion 70 that movably supports a printing medium S, and a maintenance unit 90 .

[0021] The inkjet head unit 10 includes an inkjet head 300 as a liquid ejection unit and an in...

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PUM

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Abstract

The invention provides an ink jet head and an ink jet printer capable of preventing electrolysis of conductive ink. An ink jet head includes a plurality of first sidewalls, a plurality of second sidewalls, a first electrode, second electrodes, a public ink chamber and a control unit. The first electrode is formed on the bottom surface and the side surfaces in a driving pressure chamber, and the driving pressure chamber is formed between the first sidewalls and the second sidewalls. The second electrodes are formed on the side surfaces of a virtual pressure chamber, the virtual pressure chamber is formed between the first sidewalls and the second sidewalls, and the virtual pressure chamber and the driving pressure chamber are alternatively formed. The public ink chamber supplies conductive ink to the driving pressure chamber. The control unit applies a second driving voltage to the second electrodes which makes contact with the first sidewalls and the second sidewalls for forming the driving pressure chamber when a first driving voltage is applied to the first electrode and the ink is ejected from the driving pressure chamber, and when the ink is not ejected from the driving pressure chamber, the second electrodes become high impedance, and waveforms of the second driving voltage are waveforms which are at least partly inverted relative to waveforms of the first driving voltage.

Description

technical field [0001] Embodiments of the present invention relate to an inkjet head and an inkjet printer. Background technique [0002] Among the inkjet heads, there is an inkjet head having a structure in which conductive ink is in direct contact with electrodes in a pressure chamber. In an inkjet head in which ink directly contacts an electrode, ink electrolysis sometimes occurs due to a voltage applied to the electrode. If the ink is electrolyzed, air bubbles are sometimes generated. Contents of the invention [0003] The technical problem to be solved by the invention [0004] In order to solve the above-mentioned technical problems, an inkjet head and an inkjet printer that prevent electrolysis of conductive ink are provided. [0005] Technical solutions to technical problems [0006] According to an embodiment, an inkjet head includes: a plurality of first side walls formed of piezoelectric elements; a plurality of second side walls formed of piezoelectric elem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/14B41J2/045
CPCB41J2/04541B41J2/14209B41J2002/14217B41J2/0453B41J2/04581
Inventor 日吉光幸仁田昇小野俊一
Owner TOSHIBA TEC KK
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