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Ink-jetting print head

A printing head and inkjet technology, applied in printing, inking devices, etc., can solve problems such as crosstalk and affecting cavity ejection characteristics

Inactive Publication Date: 2004-05-26
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of densely arranging the constituent elements in this way, there is a problem that when ink droplets are ejected by pressurizing a specific cavity, the pressurizing force is also transmitted to the cavity adjacent to the cavity to be pressurized. , thereby affecting the injection characteristics of adjacent cavities, that is, cross talk

Method used

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  • Ink-jetting print head
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  • Ink-jetting print head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Embodiments of the present invention will be described below with reference to the drawings. Below, refer to Figure 1 ~ Figure 4 The print head 1 according to one embodiment of the present invention will be described. figure 1 is a plan view of the print head 1 viewed from the bottom surface side serving as the ink ejection surface, figure 2 yes figure 1 A magnified view of the area enclosed by the dot-dash line depicted in . image 3 yes figure 2 A magnified view of the area enclosed by the dot-dash line depicted in , Figure 4 yes figure 1 Cutaway view of key parts of the printhead shown.

[0028] The print head 1 is different from the print head for the so-called line printer which has the print head itself which is widely used to move and scan relative to the recording medium, or which only has one or more rows of nozzles for ejecting ink. The nozzles are arranged in a matrix structure on the ink ejection surface. In addition, the printing head 1 is not m...

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PUM

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Abstract

To obtain a quality image with less cross talks from a surrounding cavity not causing any deviation out of dot positions, in a print head wherein cavities are arranged in a matrix order. When it is defined that the number of layers of piezoelectric elements is N, the number of active layers of piezoelectric elements is A , an inner angle less than 90[deg.]in a virtual lattice including the cavity is [alpha][[deg.] ], an occupied area of the virtual lattice is Spin [mm2], an occupied area of a cavity is Scav [mm2], an occupied area of an active part in the piezoelectric element provided in the cavity is Spzt [mm2], an angle and dimension of each section are fixed so as to satisfy the relevant formula (1): KOxNaOxAbOx[alpha]cOxSpindox(Scav / Spin)eOx(Spzt / Scav)fO<=O.1, wherein aO=1.87686, bO=0.31786, cO=-0.18649, dO=-1.09273, eO=3.97019, fO=0.93332 and KO=0.05307.

Description

technical field [0001] The present invention relates to an inkjet printhead that ejects ink onto a recording medium, and more specifically, to an inkjet printhead that arranges a plurality of cavities for holding ink in a matrix. Background technique [0002] An inkjet print head (hereinafter referred to as a print head) supplies ink from an ink tank containing ink to a plurality of cavities (pressure chambers) through a manifold (supply channel), and supplies ink to each cavity through a piezoelectric element respectively provided in each cavity. The cavities selectively apply pressure to eject ink from nozzles formed in communication with the respective cavities. In the print head, since higher quality and higher definition of printed images are required, it is necessary to reduce the arrangement pitch of the nozzles. [0003] Accordingly, in the print head, components such as piezoelectric elements and cavities related to nozzles are also required to be densely arranged....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/055B41J2/14
CPCB41J2/055B41J2002/14459B41J2002/14225B41J2202/20B41J2/14209
Inventor 大石龙雄
Owner BROTHER KOGYO KK