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Liquid ejection head and liquid ejection apparatus

A liquid ejection head, liquid technology, applied in printing and other directions, can solve the problem of difficult to increase the width of the flow path, and achieve the effect of suppressing the change of circulation flow and pressure change

Active Publication Date: 2017-07-28
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when a plurality of ejection port rows are arranged at high density, it is difficult to increase the width of the flow path extending in the row direction of the ejection port row due to the relationship between adjacent flow paths (multiple ejection port rows length in the configuration direction)
For this reason, there will be a large pressure loss

Method used

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  • Liquid ejection head and liquid ejection apparatus
  • Liquid ejection head and liquid ejection apparatus
  • Liquid ejection head and liquid ejection apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0188] refer to Figure 22A to Figure 28C , the liquid ejection head according to the first embodiment of the present invention will be described. In addition, the liquid supply path of the above-mentioned application example corresponds to the first common supply flow path of this embodiment. Likewise, the liquid recovery path corresponds to the first common recovery flow path, the first communication port corresponds to the opening, the common supply path corresponds to the third common supply flow path, and the common recovery path corresponds to the third common recovery flow path.

[0189] Figure 22A to Figure 22M is an exploded view showing a liquid ejection head according to an embodiment of the present invention. Figure 22A to Figure 22G It is an exploded perspective view showing constituent parts. Figure 22H to Figure 22M are components shown corresponding to the Figure 22B to Figure 22G exploded top view. Figure 23A to Figure 23G is showing Figure 22A A s...

no. 2 approach

[0276] refer to Figure 29A to Figure 32D , a liquid ejection head according to a second embodiment of the present invention will be described. The same reference numerals will be given to the same constituent elements as those of the above-described embodiment, and descriptions thereof will be omitted.

[0277] Figure 29A to Figure 29M is an exploded view showing a main part of the liquid ejection head according to the embodiment of the present invention. Figure 29A to Figure 29G is an exploded perspective view showing constituent parts, Figure 29H to Figure 29M is an exploded plan view showing constituent parts.

[0278] Figure 30 It is a plan view showing the shape of the printing element substrate of the liquid ejection head according to this embodiment. Figure 31 is a schematic perspective view showing the liquid ejection head and showing the end of the ejection port row. FIG. 32 is a graph showing changes in circulation flow rate in this embodiment. Figure 3...

no. 3 approach

[0306] Figure 33A to Figure 33L is a diagram showing a liquid ejection head according to a third embodiment of the present invention. The same reference numerals will be given to the same constituent elements as those of the above-described embodiment, and descriptions thereof will be omitted. Figure 33A to Figure 33L is an exploded view showing a main part of the liquid ejection head according to the embodiment of the present invention. Figure 33A to Figure 33F is a stereogram. Figure 33G to Figure 33L is a top view.

[0307] In this embodiment, if Figure 33G with Figure 33H As shown, one first common supply channel 5313 communicates with the pressure chambers 3023 arranged at the two discharge port rows 3024 . Likewise, one first common recovery channel 5314 communicates with the pressure chambers 3023 arranged at the two discharge port rows 3024 . That is, if Figure 33G with Figure 33H As shown, a first common supply flow path 5313 or a first common recovery...

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Abstract

Provided are a liquid ejection head and a liquid ejection apparatus. The liquid ejection head comprises: an ejection opening row along a first direction; a pressure chamber with print-element; a passage communicating with the pressure chamber; a supply opening row along the first direction with supply openings extending in a second direction to supply liquid to the passage; a collection opening row along the first direction with collection openings extending in the second direction to collect a liquid from the passage; a first common supply passage along the first direction to supply a liquid to the supply opening row; a first common collection passage along the first direction to collect a liquid from the collection opening row; a first supply side communication opening extending in the second direction to supply a liquid to the first common supply passage; and a first collection side communication opening extending in the second direction to collect a liquid from the first common collection passage, wherein at least one of the first supply side communication opening and the first collection side communication opening is provided at a plurality of positions.

Description

technical field [0001] The present invention relates to a liquid ejection head and a liquid ejection device capable of ejecting liquid such as ink from ejection ports. Background technique [0002] In inkjet technology that prints images by ejecting liquid such as ink, demands for high-precision and high-quality printing actions are increasing according to various application fields of inkjet printing actions in recent years. In order to improve the accuracy of the printing operation, it is known to improve the printing resolution by densely arranging a plurality of ejection ports. In addition, in order to realize high-quality printing action, it is necessary to suppress thickening of ink due to evaporation of moisture in the discharge port, because thickened ink causes droplet discharge speed to decrease or color density to be modulated. [0003] As a method of suppressing thickening of ink due to evaporation of water in the discharge port, a method is known in which ink i...

Claims

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Application Information

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IPC IPC(8): B41J2/21
CPCB41J2/2107B41J2/14032B41J2/145B41J2/175
Inventor 奥岛真吾刈田诚一郎青木孝纲永井议靖西谷英辅驹宫友美
Owner CANON KK
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