JPS63233861A - Electrotransfer recorder - Google Patents

Abstract

PURPOSE:To prevent a shortcircuit between a recording electrode and a common electrode and to enable high quality stable printing, by arranging two rows of electrodes in zigzag manner perpendicularly to printing direction with predetermined interval, then employing one row of electrode as recording electrodes while the other row of electrodes as common electrodes and conducting power while making contact with a sheet member. CONSTITUTION:When a recording head is moved in the direction of an arrow A, discrete electrodes 1a-1d of a common electrode 1 are maintained at the same potential, while potential is applied selectively onto the electrodes 2a-2c in a recording electrode 2 according to a print pattern so as to conduct power to the electrodes 2a-2c. Here, abraded powder 9 adheres to the recording electrode 2. Upon the finish of single line printing, a recording paper is advanced by a single line then a recording head is moved in reverse direction from arrow A and printing is performed. At this time, abraded powder 10 adheres to the recording electrode 2. Abraded powder 9 adhered to a preceding electrode 2 is scratched off through friction with a sheet member 6. Since common electrodes 1 and recording electrodes 2 are arranged in zigzag manner perpendicularly to the printing direction with predetermined interval, shortcircuit between the common electrode 1 and the recording electrode 2 can be prevented even if abraded powder 9, 10 adheres between the electrodes 1 and 2.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electrical transfer recording apparatus such as a printer that records image information and character information by transferring thermal ink onto recording paper.

Conventional technology In recent years, printers have been widely used as output devices for personal computers, word processors, etc., and there is a strong demand for higher performance.Electrical transfer printers have a simple structure, low printing noise, and fast printing speed. Because it is fast,
This is one particularly effective method.

This current transfer recording device is equipped with a recording head in which a plurality of needle-shaped recording electrodes and a plate-shaped common electrode are embedded in a holding material, in contact with a sheet member consisting of a heat-sensitive ink layer and a conductive current-conducting layer, and prints. The recording electrode is configured to apply a voltage to the recording electrode according to information, and to conduct electricity between the recording electrode, the current-conducting layer of the sheet member, and the common electrode.

An example of the above-mentioned conventional electrical transfer recording apparatus will be described below with reference to the drawings.

Figures 3 and 4 show the main parts of the electrodes of a conventional electrical transfer recording device. Figures 3(a) and 4(a) are front views of the electrodes, 4(b) is a side cross-sectional view of the electrodes. 11 is a common electrode, 12 is a recording electrode, and 3 is a holding material that holds the common electrode 11 and the recording electrode 12.

The operation of the current transfer recording apparatus configured as described above will be described below.

As shown in FIG. 3(b), when the recording head is moved in the direction of arrow A while being energized for printing, abrasion particles of the current-carrying layer and the electrodes tend to adhere to the left side of the recording electrode 12.

This is because the holding material 3 is made of a material that is softer and more easily worn than the electrodes 11.12, and the electrodes 11.12 are made to protrude from the surface of the holding material 3 in order to ensure that the electrodes 11.12 are in contact with the current-carrying layer of the sheet member. This is because it is configured as follows. Therefore, abrasion powder of the current-carrying layer, which is susceptible to fatigue wear due to heat generation due to energization, is generated in the vicinity of the recording electrode 2, and this abrasion powder adheres to the shadow of the protruding portion of the recording electrode 12.

It should be noted that the reason why no abrasion powder adheres behind the protruding portion of the common electrode 11 is because the area ratio of the common electrode 11 and the recording electrode 12 in contact with the sheet member is large, so that electricity is not applied in the vicinity of the recording electrode 12. This is because the current density increases, heat is generated locally, and due to thermal fatigue, abrasion powder of the current-carrying layer adheres only to the vicinity of the recording electrode 12.

In the normal printing mode, even if the abrasion powder 13 adheres as described above, it does not affect printing, but if printing is performed in the opposite direction, that is, in the direction of arrow B, as shown in Figure 4 (bl), The situation changes.Abrasion powder 14 is generated as in the case of printing in the A direction in Fig. 3, but since the printing direction is in the opposite direction,
Abrasion particles 14 may become entangled in a bridge shape between the common electrode 11 and the recording electrode 12. Since this abrasion powder 14 is abrasion powder of the electrode and the current-carrying layer, it is conductive and causes a short circuit between the recording electrode 2 and the common electrode ]1. No current flows through the current-carrying layer of the sheet member, and therefore, the ink in the heat-sensitive ink layer cannot be transferred to the recording paper due to the heat generated by the current-carrying layer.

Problems to be Solved by the Invention However, with the above configuration, if printing is performed in the opposite direction in an attempt to shorten the printing time, the electrodes may be short-circuited due to abrasion powder that has adhered between the recording electrode and the common electrode. The problem is that it is easy to do.

In view of the above-mentioned problems, the present invention provides an electrical transfer recording device that does not cause short-circuiting between the recording electrode and the common electrode when printing in either direction, and enables stable, high-quality printing.

Means for Solving the Problems In order to solve the above-mentioned problems, the current transfer recording device of the present invention has two rows arranged in a staggered manner at a predetermined interval perpendicular to the printing direction, and recording electrodes are arranged in one row in a staggered manner. , the other column is used as a common electrode, and an electrode is provided that contacts the sheet member to conduct electricity.

In the above-described configuration, the present invention arranges the recording electrodes and the common electrode in two rows in a staggered manner even when printing in either the forward or reverse direction, so that conductive abrasion particles do not leave long tails on the recording electrodes. Even if it is attached in a pulling manner, it will not short-circuit with the common electrode. Therefore, stable, high-quality bidirectional printing is possible.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 shows a principle diagram of an electric transfer recording apparatus according to an embodiment of the present invention. In FIG. 1, ``■'' is a common electrode, 2 is a recording electrode, and 3 is a holding material. Electrodes 1 and 2 are embedded in the holding material 3 to constitute a recording head. Reference numeral 8 denotes an energization control means that is connected to the electrodes 1.2 and energizes each electrode according to a printed pattern. Reference numeral 6 denotes a sheet member, which has a 2N structure including a current-carrying layer 4 made of a resistor that self-heats when energized in contact with the electrode 1.2, and a heat-sensitive ink layer 5 that is transferred to the recording paper 7 by the heat generated by the current-carrying layer 4. . 5a are ink particles transferred from the thermal ink layer 5.

In the figure, there is a gap between the recording paper 7 and the sheet member 6, but this is to make it easier to see the pattern transferred by the ink droplets 5a to the recording paper 7. In reality, the recording paper 7 must be in close contact with the sheet member 6. .

FIG. 2 shows the main parts of the current transfer recording apparatus shown in FIG. 1, and is a front view of the common electrode 1 and the recording electrode 2. As shown in FIG.

In FIG. 2, 13 to 1d indicate individual electrodes of the common electrode 1, and 2a to 2c indicate individual electrodes of the recording electrode 2, which are arranged parallel to each other at intervals.

The operation of the current transfer recording apparatus of this embodiment configured as described above will be described below.

When moving the recording head in the direction of arrow A shown in FIG.
energize by selectively applying a potential. At this time, recording electrode 2
Abrasion powder 9 adheres to the surface.

Next, after printing one line, advance the recording paper one line and press the arrow A.
When printing is performed by moving the recording head in the opposite direction, abrasion powder 10 adheres to the recording electrode 2.

At this time, the abrasion powder 9 that adhered to the recording electrode 2 during printing in the direction of arrow A is peeled off by friction with the sheet member 6.

When printing is performed again in the direction of arrow A, abrasion powder 9 adheres to recording electrode 2, but abrasion powder 10 is peeled off.

As described above, according to this embodiment, since the common electrode 1 and the recording electrode 2 are arranged in a staggered manner with a predetermined interval perpendicular to the printing direction, the abrasion powder 9 and 10 of the sheet member 6 is Even if it adheres between the common electrode 1 and the recording electrode 2, it is possible to prevent a mutual short circuit.

In this embodiment, the sheet member 6 has a two-layer structure of the conductive layer 4 and the heat-sensitive ink layer 5, but it is not necessary to limit the number to two layers. For example, on both sides of the conductive layer made of a material with low electrical resistance, It may have a three-layer structure including a current-conducting layer and a heat-sensitive ink layer.

Effects of the Invention As described above, the present invention has two rows of electrodes arranged in a staggered manner at a predetermined interval perpendicular to the printing direction, thereby preventing short circuits between the electrodes due to abrasion particles and allowing bidirectional communication. Stable printing is possible and high speed is possible. Furthermore, bidirectional printing enables self-cleaning of wear particles.

[Brief explanation of drawings]

Fig. 1 is a principle diagram of an electric transfer recording device according to an embodiment of the present invention, Fig. 2 is an enlarged view of the main parts of Fig. 1, and Figs. 3 and 4 are enlarged views of the main parts of a conventional electric transfer recording apparatus. It is a diagram. 1...Common electrode, 2...Recording electrode, 3
...Holding material, 4... Current-carrying layer, 5...
...Thermal ink layer, 6... Sheet member, 7.
...Recording paper, 8...Electrification control means, 9
．． 10.13.14...Wear powder, 11...
...Common electrode, 12...Recording electrode. Name of agent: Patent attorney Toshio Nakao (1 person) Figure 3 (α) Figure 4 Go to Q Paper ＼ N5 ＼ View

Claims (2)

[Claims] (1) Electrodes arranged in two staggered rows at a predetermined interval perpendicular to the printing direction, one row serving as a recording electrode and the other row serving as a common electrode, are provided with electrodes that contact the sheet member to conduct electricity. An electrical transfer recording device characterized by: (2) The electrical transfer recording device according to claim 1, which prints in both directions.