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Ink jet head

An inkjet head and ink technology, applied in printing and other directions, can solve problems such as damage to image quality

Inactive Publication Date: 2003-11-05
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the case of a single heat generating body in the past, it is not a problem, but when the heat generating body is divided into multiple parts and arranged, if the relative position of the heat generating body 1102 and the ejection port 1104 is shifted, as Figure 11 On recording media, spraying at a location farther from the main droplet appears to impair image quality as shown in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] figure 1 It is a perspective plan view showing the arrangement relationship of the ink flow channel, the heating element, and the ejection port in the inkjet head according to the first embodiment of the present invention.

[0036] The inkjet head of this embodiment has a substrate 1 provided with a plurality of heating elements 2 on its surface, and a flow channel forming member 3 provided on the substrate 1 . The channel forming member 3 has a partition plate 3 a that separates the plurality of heating elements 2 two by two, and a top wall 3 b facing the substrate 1 . The partition plate 3 a forms a plurality of ink flow channels 5 for supplying ink to a pressure generating region constituted by the two separated heating elements 2 . In addition, in each ink channel 5, from the center of the pressure generating region constituted by the two heating elements 2, a ceiling wall 3b is formed on an extension line extending along the normal direction to the surface of the...

Embodiment 2

[0051] Figure 4A and 4B It is a figure showing the arrangement relationship of the ink flow channel, the heat generating body and the ejection port in the inkjet head of Example 2 of the present invention, Figure 4A is its top view, Figure 4B is its cross-sectional view.

[0052] Such as Figure 4A As shown, the inkjet head of this embodiment is provided with a pressure generating region of four heating elements 2 in one ink channel 5 . When the direction of the ink flow in the ink channel 5 is the X direction and the direction perpendicular thereto is the Y direction, two heat generating elements 2 are arranged in each of the X direction and the Y direction. In addition, these heating elements 2 are electrically connected in series by wiring. The ejection ports 4 are arranged on an extension line extending from the center of the pressure generating region formed by the four heating elements 2 along the normal direction to the surface of the pressure generating region....

Embodiment 3

[0059] Figure 5 It is a perspective plan view showing the arrangement relationship of the ink flow channel, the heating element, and the ejection port in the inkjet head according to the third embodiment of the present invention.

[0060] In the inkjet head of Example 3, as in Example 1, two elongated heating elements are arranged in one ink flow path 5 . Other configurations of the recording head are also the same as those in Example 1.

[0061] In this embodiment, the width of each heating element 2 is 11 μm, the length is 27 μm, the distance dhh between two heating elements 2 is 4 μm, and the distance dhc between the centers of two heating elements 2 is 15 μm. In addition, the opening diameter do of the discharge port 4 was 10.5 μm, and the height OH from the upper surface of the substrate 1 to the opening surface of the discharge port 4 was 40 μm.

[0062] In this way, in the structure where the opening surface of the ejection port 4 is relatively far from the surface o...

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Abstract

The invention discloses an inkjet head, comprising: a substrate provided with a heating element for generating bubbles in the ink on the surface; opposite to the surface of the substrate, a plurality of substrates for ejecting the ink Ejection port: a plurality of ink flow channels respectively communicating with the plurality of ejection ports and supplying the ink. A plurality of the heating elements are provided in each of the ink flow channels, and the ejection ports are arranged at a position extending from the center of the pressure generating region formed by the heating elements toward the normal direction with respect to the surface of the substrate. extension cord. A distance dhc between respective centers of two heat generating bodies arranged farthest from each other among the plurality of heat generating bodies is set to be larger than an opening diameter do of the discharge port. In the above inkjet head, even if the center position of the ejection port and the center position of the pressure generating region are slightly shifted, the main liquid droplets of the ink are ejected from the ejection port without being deviated in the ejection direction.

Description

technical field [0001] The present invention relates to an inkjet head for ejecting ink onto a recording medium for recording. Background technique [0002] In recent years, inkjet recording devices have been widely used especially as computer output devices because they can easily obtain high-quality characters and images. Among them, the bubble jet method, in which the ink is ejected from the nozzle by the rapid pressure change caused by the rapid boiling of the ink in the nozzle, can easily arrange a plurality of nozzles with high density with a simple structure, so it becomes an inkjet jet method. The mainstream of recording devices. [0003] Furthermore, with the popularization of ink jet recording apparatuses in recent years, the performance thereof, especially the requirements for image quality and recording speed have been increasing. In order to improve the image quality, it is very important to reduce the dot diameter recorded on the recording medium (especially ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/05B41J2/14
CPCB41J2/14056B41J2002/14185B41J2002/14387B41J2002/14169B41J2/14
Inventor 金子峰夫土井健佃圭一郎及川真树矢部贤治
Owner CANON KK
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