JPS5862061A - Ink jet printing device - Google Patents

Abstract

PURPOSE:To make it possible to perform multiplex driving by laminating pressurizing chambers whose number is the same as that of nozzles and two piezoelectric elements on the outer wall of the chambers, individually applying signals to the piezoelectric element, thereby reducing wirings and the number of the device drivers. CONSTITUTION:The case of four nozzles is illustrated. A numeral 10 is an ink tank which supplies ink to each supply path 4, and x1, x2, y1, and y2 are the drivers. When one of the piezoelectric elements X and Y is driven, the deformation of a vibrating plate 5 is about half the deformation when both are driven, and the ink is not jetted. When the driver x1 and the driver y1 are driven, the ink is jetted only from 2-1 which is selected by the piezoelectric elements X and Y. This example shows the four nozzles. In general, since (mXn) nozzles can be driven by (m+n) drivers, e.g. a multiple nozzle heads having 1,000 or more nozzles becomes advantageous.

Description

[Detailed description of the invention] The present invention relates to multi-nozzle inkjet.

This invention relates to an inkjet head capable of multiplex drive.

Ink-on-demand inkjet is attracting attention because it is relatively easy to highly integrate nozzles. However, as the number of nozzles increases, the number of drivers and wiring also increases. ' Therefore, the present invention increases the number of drivers and wiring.

The goal is to obtain a so-called multiplex WT head.

t4:1 Figure 1 shows an embodiment of the present invention, with an IFi substrate having nozzles 2. Pressurized chamber 5. The supply channel 4 is formed as a groove. 5 is a diaphragm and its table 1iiKX.

Two piezoelectric elements of Y are stacked and arranged.

Wiring lines 6, 7.8 from the piezoelectric elements X, Y are connected to a driver driver (not shown). Nozzle 2. The pressurized chamber S, etc. is filled with ink 9.

In terms of sales composition, 1@6 and 7. When a voltage is applied between wires @7 and 8, EEl[elements X and Y contract as shown by the arrows. Since the piezoelectric perforators x, yti are bonded to the vibration fF5, the vibration 8i5 is deflected inward, and the volume of the pressurizing chamber 3 is reduced (1, a part of the ink 9 is ejected from the nozzle 2 and printing is performed. .

Fig. fK2 shows the principle of multiplex driving of the head shown in Fig. 1. In this example, there are four nozzles, shown as 2-1, 2-2, and 10 indicates each supply. e x 1, which is an ink tank that supplies ink to path 4;
, x 2 , y 1 , y 2 Fi drivers. The figure (IL) shows a portion of the piezoelectric element X [1] A piezoelectric element Y shown in figure (b) is laminated thereon. As you can see from the EI diagram, when only one piezoelectric element X or one blade of the blade is driven, the piezoelectric element X! When both of the piezoelectric elements X1 and Y1 are driven, the deformation of the vibration pole is about half and no ink is ejected. Therefore, in Fig. 92, when the driver x1 and the driver y1 are driven, the piezoelectric element 2-1 selected by the piezoelectric elements Ink is ejected only from the inside. @2 In figure -1, the number of nozzles is 4, so there is no advantage of multiplex island movement, but in general, the driving of mXn nozzles is (
Since it can be driven by m+n) drivers, 1, for example, 100
This is very advantageous in multi-nozzle heads having zero or more nozzles.

FIG. 5 shows another embodiment of the present invention. In this case, unlike the example shown in FIG. 1, the piezoelectric element
7. Piezoelectric element Y expands upon application of voltage. 2: The volume of the pressurizing chamber changes due to the piezoelectric element in the second layer. In this case, the contact $@10 has the function of adhering the piezoelectric element Y to the base 181 rather than functioning as a diaphragm 1-. It only has the function of forming one arm.

In addition, in both the embodiments shown in Fig. 91 and Fig. #-3, piezoelectric elements are integrally laminated in a large number of pressurizing characters (7, only electrodes are provided corresponding to each pressurizing chamber 7, thereby performing multiplex drive). It's okay.

As can be seen from the above description, according to the present invention, the number of pressurizing chambers is the same as that of each nozzle, and the X
, Y, and by applying signals to the X and Y piezoelectric elements individually.

Multiplex drive with fewer wiring lines and fewer drivers is possible.

The present invention is a printer, plotter, and facsimile.

It can be applied to hard copy 1#I of various foods such as copiers.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, FIG. 2 is a plan view illustrating a case where the head shown in FIG. 1 is used for multiplex driving, and FIG. 5 is another embodiment of the present invention. A cutaway diagram showing an example. 1... Base 2... Nozzle 5.
... Pressure chamber 5 ... Vibration plate X, Y.
...Piezoelectric element xl, 12. yl, y2-・・・Applicant for drivers and above Shinshu N-Eki Co., Ltd. 11 & Kosei Kokai No. 21 il

Claims (1)

[Claims] In a multi-nozzle inkjet head in which a large number of nozzles are integrated, pressurization chambers with the same number of nozzles communicating with each nozzle, and X arranged in a stacked manner on the outer wall of the pressurization chamber,
Y consists of two groups of piezoelectric ice cubes, and the above! , Y piezoelectric elements to eject ink from selected nozzles.