JP2605976B2 - Ink jet recording device - Google Patents

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 which uses thermal energy to eject ink droplets.

[0002]

2. Description of the Related Art A piezoelectric element is provided 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, thereby pressurizing the ink in the flow path, and partially disposing the discharge port. An on-demand type ink jet recording apparatus that discharges ink droplets onto a recording medium uses a movable piezoelectric element that requires a large space as a means for pressurizing ink reaching an ejection port. Not only can high-density nozzles, which affect quality, not be provided, but these piezoelectric elements must be provided outside the recording head, which may cause inconvenience in terms of device reliability. doing.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem.
It is an object of the present invention to provide a new ink jet recording apparatus which is small and can increase the density of nozzles and improve the reliability of the apparatus. ,

[0004]

That is, according to the present invention, as an ink jet recording apparatus for achieving the above object, a plurality of ink streams communicating with an ink reservoir are provided inside a common base having an ink reservoir. Path, an electric resistor as a heating element for independently heating and evaporating ink in each flow path from the ink reservoir to the nozzle, a common electrode and a signal electrode for applying a voltage to the electric resistor according to recording information Is arranged.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 shows an embodiment of the present invention. A common ink reservoir 3 communicating with an ink supply port 2 is formed in a longitudinal direction of the base 1 inside a base 1 constituting a recording head. Here, a large number of ink flow paths 5 opening as orifices 4 on one side of the base 1 are provided so as to communicate with each other, and are provided in a direction perpendicular to the ink reservoir 3.

Reference numeral 6 denotes a heating element as ink pressurizing means provided on a 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. The heating elements 6 are connected to a single lead wire 8 through a common electrode 7 extending to the side of the base 1, while
Each of the corresponding lead wires 10 is connected to each of the corresponding lead wires 10 via individual signal electrodes 9 extending to the other side of the base 1 along each ink flow path 5 so that a voltage corresponding to the recording information is selectively applied. Is configured.

In the ink jet recording apparatus thus configured, when a voltage corresponding to recording information is selectively applied to the heating element 6 via the signal electrode 9, the heating element 6 formed of a resistor is placed near the heating element 6. The ink is heated to evaporate and expand, and the pressure at that time is applied to a stably held ink by forming a meniscus in front of the ink, and the ink is ejected as ink droplets onto a recording medium (not shown). To form a dot for one pixel.

[0008]

According to the present invention as described above, according to the present invention, in
Communication with the ink reservoir inside a common substrate with a reservoir
A plurality of ink flow paths, an electrical resistor for heating vaporized ink in the flow path, these electrical resistance in accordance with recording information
Since a signal electrode and a common electrode for selectively applying a voltage to the body are provided , no mechanical movable member is required.
On-demand ink that can discharge ink droplets
The jet recording device can be configured as one member.
With wear, unwanted by integrating a whole ink discharge mechanism, a troublesome work such as assembling a plurality of parts
Not only can the device be constructed inexpensively.
And prevents damage to electrodes and other components caused by contact with external components.
The reliability of the equipment can be significantly increased
Also achieve a high density of influencing the ink flow path print quality
can do.

[Brief description of the drawings]

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

[Explanation of symbols]

 DESCRIPTION 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 (2)

(57) [Claims] Inside the common substrate having a 1. A ink reservoir chamber, and a plurality of ink flow path communicating with the ink reservoir chamber, said Lee <br/> extending from ink reservoir chamber to the nozzle each flow path An ink jet recording apparatus comprising: an electric resistor as a heating element 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. To 2. The upper listening ink reservoir chamber, an ink jet recording apparatus of the claims paragraph 1, wherein that communicates the ink channel perpendicular orientation.