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Liquid spray head and ink-jet recording device

A liquid ejection head and liquid technology, which is applied in the field of liquid interference between nozzles, can solve problems such as crosstalk and ejection instability, and achieve the effects of reducing crosstalk, suppressing crosstalk and suppressing vibration.

Active Publication Date: 2012-01-11
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the inkjet head of this channel structure, if one energy generating element is driven to eject ink from the nozzle, the ink flow at the time of ejection will affect other nozzles communicating with the same common channel through the common channel to generate jetting. The so-called crosstalk phenomenon that becomes unstable

Method used

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  • Liquid spray head and ink-jet recording device
  • Liquid spray head and ink-jet recording device
  • Liquid spray head and ink-jet recording device

Examples

Experimental program
Comparison scheme
Effect test

Deformed example 1

[0078] exist figure 2 In , an example is shown in which one air-opening hole (24, 34) is formed with respect to one common flow path (20, 30), but the number of air-opening holes and the distribution (arrangement method) of the arrangement can be various. design.

[0079] For example, in figure 2 In the flow path resistance value from the connection port 26 on the supply side (corresponding to the "first connection port") to the pressure chamber 14 (from the connection port 26 through the first common flow path 20, the first independent flow path 22 to the pressure The flow path resistance value of the flow path system of the chamber 14), and the flow path resistance value from the connection port 36 (corresponding to the "second connection port") on the recovery side to the pressure chamber 14 (from the connection port 36 via the second common flow 30, the second independent flow path 32 to the pressure chamber 14 (the flow path resistance value of the flow path system of...

Deformed example 2

[0082] image 3 It is a figure which shows another modification. exist image 3 in, for and in figure 1 and figure 2 Elements having the same or similar structures as described in hereinafter are denoted by the same reference numerals, and descriptions thereof are omitted.

[0083] Such as image 3 As shown, a plurality of atmospheric opening holes ( 24A to 24C, 34A to 34C) may be arranged with respect to one common flow path ( 20 , 30 ). In this figure, atmosphere opening holes 24A, 24B, and 24C are respectively formed in the vicinity of the end portion (right end portion) of the first common flow path 20 and the two nozzles 12 near the end portion. The same is true for the second common flow path 30. The atmosphere opening holes 34A, 34B, 34C.

[0084] exist image 3 Among them, the atmosphere opening holes (24B, 24C, 34B, 34C) are arranged near the branch point from the common flow path (20, 30) to the independent flow path (22, 32), but the atmosphere opening hole...

Deformed example 3

[0088] exist Figure 1 to Figure 3 In , the circulation type inkjet head that circulates the ink in the pressure chamber 14 is described, but the present invention can also be applied to a non-circulation type inkjet head that does not have a flow path of a circulation system (recovery system). exist Figure 4 An example of arrangement of nozzles and air-opening holes in a non-circulation type inkjet head is shown in . exist Figure 4 in, for and in image 3 The same or similar structures in the examples described in hereinafter are denoted by the same reference numerals, and descriptions thereof are omitted.

[0089]

[0090] (Conditions of inertia)

[0091] Assuming that the respective inertias (inertance) of the nozzle for ink ejection, the throttle portion, and the air opening hole are La, Lb, and Lc, Lb>La and Lb>Lc are preferable.

[0092] The inertia L is represented by the following formula (Equation 1), where p is the density of the ink, l is the length of the ...

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Abstract

The invention provides a liquid spray head and an ink-jet recording device using the liquid spray head, which can make the required energy (vibration) for spraying not attenuate and thus reduce the crosstalk. The liquid spray head comprises a plurality of injectors. Each injector comprises a nozzle for spraying liquid drops; a pressure chamber which is equipped corresponding to the nozzle; and an energy generating element for exerting spraying force on the liquids inside the pressure chamber. Inside the liquid spray head, there is a common flow path which supplies liquids to a plurality of pressure chambers; a throttling part equipped on the independent flow path parts where each pressure chamber is connected with the common flow path; and air opening holes communicated with the common flow path and having an opening on the nozzle face. The flow path vibration can be absorbed by the bent liquid levels inside the air opening holes. If the inertia of the nozzle, the inertia of the throttling part and that of the air opening holes are respectively set as La, Lb, and Lc, preferably Lb is more than La and Lb is also more than Lc.

Description

technical field [0001] The present invention relates to a liquid ejection head, in particular to a liquid ejection head having a structure in which a liquid is supplied from a common flow path to a plurality of pressure chambers corresponding to a plurality of ejection ports (nozzles), and to prevent the use of the liquid A technique in which liquids interfere with each other (crosstalk) between nozzles in an inkjet recording device of an ejection head. Background technique [0002] Generally, an inkjet head has a plurality of ink ejection elements (ejectors), fills a pressure chamber communicating with a nozzle with liquid, and ejects ink droplets from the nozzle by driving an energy generating element provided in the pressure chamber. In the inkjet head having a plurality of ejectors as described above, there is known a flow path structure in which a plurality of pressure chambers are connected in parallel to a common ink flow path (common flow path), and from the common f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/045
CPCB41J2202/12
Inventor 横田泰代
Owner FUJIFILM CORP
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