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Liquid ejecting head and liquid ejecting apparatus

A liquid ejection head and liquid technology, applied in the direction of inking device, printing, etc., can solve problems such as stagnation of liquid supply, ejection of liquid, increase in the number of nozzle openings, etc.

Inactive Publication Date: 2011-08-24
SEIKO EPSON CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] When the supply port is blocked by air bubbles, the supply of liquid stagnates, and when the pressure chamber is depressurized to supply the liquid, the liquid cannot be ejected from the nozzle opening even if the pressure chamber is pressurized because the liquid is excessively sucked from the nozzle opening.
[0008] If the liquid is sucked excessively from the nozzle opening at one time, even if the air bubbles move from the supply port and the supply port is opened, the liquid cannot be ejected from the nozzle opening
[0009] In addition, the air bubbles move to other supply ports due to the flow of the liquid in the manifold to block the supply ports, increasing the number of nozzle openings for ejection defects, and causing ejection defects that cannot be ignored for the liquid ejection head and the liquid ejection device.

Method used

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  • Liquid ejecting head and liquid ejecting apparatus
  • Liquid ejecting head and liquid ejecting apparatus
  • Liquid ejecting head and liquid ejecting apparatus

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Embodiment Construction

[0021] Hereinafter, embodiments will be described with reference to the drawings.

[0022] figure 1 It is a schematic perspective view showing an inkjet recording device 1000 that is an example of a liquid ejecting device according to an embodiment of the present invention. The inkjet recording device 1000 is a device that ejects ink as a liquid onto a recording sheet S that is a recording medium to perform recording.

[0023] exist figure 1 In this example, an inkjet recording apparatus 1000 includes recording head units 1A and 1B having an inkjet recording head 1 as a liquid ejection head. Ink cartridges 2A and 2B constituting an ink supply mechanism are detachably provided on the recording head units 1A and 1B.

[0024] Here, the ink jet type recording head 1 is provided on the side opposite to the recording head units 1A and 1B, in figure 1 is not shown.

[0025] The carriage 3 on which the recording head units 1A and 1B are mounted is freely movable in the axial dire...

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Abstract

The invention relates to a liquid ejecting head and a liquid ejecting apparatus. Even if a bubble, which has a circular cross-section during its flowing whose diameter is longer than the short-axis length and shorter than the long-axis length of an oval shape that corresponds to the shape of an opening in a supply opening, reaches the supply opening, a gap occurs between the supply opening and the bubble, and thus the supply opening is not completely covered.

Description

[0001] This application claims priority from Application No. 2010-31000 filed in Japan on February 16, 2010, the entire contents of which are incorporated herein. technical field [0002] The present invention relates to a liquid ejection head and a liquid ejection device. Background technique [0003] As a typical example of a liquid ejection head, a piezoelectric element is provided in a plurality of pressure chambers respectively communicating with a plurality of nozzle openings, and a voltage is applied to the piezoelectric element to contract or expand the piezoelectric element, thereby decompressing the pressure chamber and supplying Ink is pressurized in the pressure chamber to eject ink droplets from the nozzle opening. [0004] As disclosed in Japanese Patent Application Laid-Open No. 2004-306381, ink is supplied from a manifold, that is, an ink storage chamber, to each pressure chamber through a supply port. The cross-sectional shape of the supply port is circular...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/045
CPCB41J2/14032B41J2202/11
Inventor 小林丰
Owner SEIKO EPSON CORP
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