JPH0747675A - Ink jet recorder - Google Patents

Abstract

PURPOSE:To allow downsizing of ink jet recorder and high density arrangement of nozzle. CONSTITUTION:A plurality of ink channels 5..., heating elements 6... for thermally gasifying the ink in the channel 5, signal electrodes 9... for applying a voltage to the heating element 6 depending on the recording information, and a common electrode 7 are disposed in the base body 1 constituting a recording head thus realizing high speed printing, high density arrangement of nozzle essential for print quality, and enhancement of reliability of ink jet recorder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording apparatus, and more particularly to an ink jet recording apparatus of the type that ejects ink droplets by utilizing heat energy.

[0002]

2. Description of the Related Art A piezoelectric element is arranged in a flow path connecting an ink tank and a discharge port, and a signal voltage is applied to the piezoelectric element to distort the ink in the flow path to partially press the ink. The on-demand type ink jet recording apparatus, which is designed to eject more ink droplets on the recording medium, uses a movable piezoelectric element that requires a large space as a means for pressurizing the ink reaching the ejection port. Not only is it impossible to densely arrange nozzles that affect quality, but there is also the problem that since these piezoelectric elements must be arranged outside the recording head, inconvenience related to the reliability of the device may occur. is doing.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its purpose is to:
It is an object of the present invention to provide a new ink jet recording apparatus which is small in size and has a high density of nozzles and reliability of the apparatus. ,

[0004]

That is, the present invention, as an ink jet recording apparatus for achieving such a problem, extends in a direction perpendicular to a common ink reservoir chamber inside a substrate constituting a recording head. A plurality of ink flow paths, an electric resistor as a heating body for independently heating and vaporizing the ink in each of the flow paths from the ink reservoir to the nozzle, and a voltage is applied to the electric resistance according to the recorded information. The common electrode and the signal electrode are arranged.

[0005]

Embodiments Now, the embodiments shown in the drawings will be described. FIG. 1 shows one embodiment of the present invention. A common ink reservoir chamber 3 communicating with an ink supply port 2 is formed in the longitudinal direction of the substrate 1 inside a substrate 1 constituting a recording head. Further, here, a large number of ink flow paths 5 ... Opening as orifices 4 are provided on one side of the base body 1 and are provided in a direction perpendicular to the ink reservoir chamber 3.

Reference numeral 6 denotes a heating element as an ink pressurizing means, which is provided on the rear inner surface of the ink flow path 5 at a distance corresponding to the amount of ink droplets to be ejected from the opening end of the ink flow path 5, and these elements serve as electric resistors. The heating elements 6 ... Are connected to a single lead wire 8 via a common electrode 7 extending laterally of the base body 1,
Via the individual signal electrodes 9 extending along the respective ink flow paths 5 to the other side of the substrate 1, they are connected to the corresponding lead wires 10 so that the voltage corresponding to the recording information is selectively applied. Is configured.

In the thus constructed ink jet recording apparatus, when the voltage according to the recording information is selectively applied to the heating element 6 via the signal electrode 9, the heating element 6 made of a resistor is in the vicinity thereof. The ink is heated and vaporized and expanded, and the pressure at that time acts on the ink that is stably held by forming a meniscus in front of it, and ejects it as an ink droplet onto a recording medium (not shown). A dot for one pixel is formed on.

[0008]

As described above, according to the present invention, a plurality of ink flow paths are provided inside the substrate that constitutes the recording head, a heating element that heats and vaporizes the ink in the flow paths, and recording information is recorded in these. Since a signal electrode for applying a voltage and a common electrode are provided according to the above, by independently disposing a heating element that can be formed as small as necessary for each ink flow path in the vicinity of each ejection port, Thermal interference with each other is suppressed as much as possible to eliminate crosstalk, and at the same time, the response of recording and writing is greatly improved, and further, high density arrangement of ink flow paths is possible, and with these heating elements By providing the electrodes connected to these in the base body, accidents such as disconnection can be eliminated, and the reliability of this type of device can be significantly improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an apparatus that constitutes an embodiment of the present invention.

[Explanation of symbols]

 1 Base 3 Ink Reservoir 5 Ink Flow Path 6 Heating Element 7 Common Electrode 8 Lead Wire 9 Signal Electrode 10 Lead Wire

Claims (1)

[Claims] 1. A plurality of ink flow passages extending in a direction perpendicular to a common ink storage chamber inside a substrate constituting a recording head, and ink in each flow passage extending from the ink storage chamber to a nozzle. An ink jet recording apparatus comprising: an electric resistor serving as a heating member for independently heating and vaporizing the ink; and a common electrode and a signal electrode for applying a voltage to the electric resistor according to recording information.