JPS6054866A - Thermal recording head - Google Patents

Abstract

PURPOSE:To contrive to enhance density without reducing the useful life of heating resistors, by a method wherein heating resistors are arranged in two rows, and a thermal recording paper is passed through the two rows of the heating resistors to produce a single developed color line. CONSTITUTION:The heating resistors 2 are arranged in two rows on a ceramic substrate 1, and electrodes 3, 3' formed of Al, Cr or the like for supplying electric power to the resistors 2 in each line are provided. The electrodes are provided by forming a patter by an etching treatment. Of the electrodes 3, 3', the electrodes 3 on one side are made to be common electrodes, and the common electrodes 3, 3 are made to abut on each other. The thermal recording paper is passed through the two rows of the resistors 2, thereby producing a single developed color line. The width in the condition where the common electrodes 3, 3 abutting against each other is set to be an integer times, ordinarily not more than 5 times, of the length of the resistor in the feeding direction of the recording paper.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an improvement in a thermal recording head for facsimile or glimmer use.

[Background of the invention]

Thermal recording is a method in which the thermal recording paper is placed in contact with a heat-generating resistor (hereinafter simply referred to as the resistor), and the required dots are energized to make the entire color of the thermal recording paper color. #: The dot shape printed on the paper has the property of being smaller than the shape of the resistor. Furthermore, the tendency for colored dots to become smaller becomes more pronounced as the recording density increases, so it is necessary to increase the torrent density.

However, since conventional thermal recording heads are configured to form one colored line using resistors arranged in one row, gaps exist between adjacent resistors, and one line on the thermal recording paper is
The dots are so small that you can't create continuous colored lines, so is this thermal recording paper? It was difficult to develop color evenly.

In addition, since the resistors are arranged in a row, in order to increase the resistor density, it is necessary to make each resistor = Iz, J - small. This shortens the life of the resistor, and it is difficult to increase the density of the hanging resistor.

[Purpose of the invention]

The object of the present invention is to overcome the problems of the prior art.

To provide a heat-sensitive recording head capable of emitting heat all over a heat-sensitive recording paper, achieving high density recording without shortening the life of a heat-generating resistor, and obtaining a high recording density.

[Summary of the invention]

In the present invention, heating resistors are arranged in two rows, and the thermal recording paper passes through the two rows of heating resistors. 7' It has a configuration in which one coloring line is formed, which makes it possible to color the entire heat-sensitive RU2 recording paper, and the density of the heating resistor for one row is halved. Is it possible to increase the recording density by making the shape of each resistor louder? This made it possible.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. 1st
1 is a plan view of a thermal recording head according to the present invention, and FIG. 2 is a sectional view taken along the line 1--2 in FIG. In the figure, heating resistors (hereinafter simply referred to as resistors) 2 are arranged in two rows on a ceramic substrate l, and At, Cr, Cu, and Au are used to supply power to the resistors 2 in each row.
, Ta, W, or the like are formed. These are completely patterned by photo-etching as shown in FIG. 2, and a protective film 4 is formed thereon. Also, among the electrodes 3 and 3' in each row, one electrode 3 is used as a common electrode, and the common electrodes 3 and 3 are made of gold butt. 5 indicates the entire abutting portion of the common electrode 3.3 0 and the thermal recording paper (not shown) is the 2 I7! By passing through the resistor 2 of I, a single colored line force is generated.

In the array of resistors 2, one row of resistors 2;
The resistors 2 in the other row are arranged half a pitch apart from each other in the illustrated row 11, that is, in a staggered arrangement. Further, the size of each resistor 2 is about 10 to 40% larger than the coloring pitch on the thermosensitive e-recording paper.

The width of the common electrode 3.3 when they are butted together is an integral multiple of the length of the resistor in the heat-sensitive recording paper feeding direction, and is usually 5 times or less.

Also, the 1 part of the board placed on one resistor row and the 1 part of the board placed on the other resistor row 1 are shown in FIGS. 2 and 3.
As shown in the figure, the heat-sensitive H self-recording paper is pressed by force between the roller 6 and the resistor 2 of each row; ing. The optimum angle differs depending on the diameter of the front roller 6 and the position of the resistor 2.

Furthermore, when manufacturing a thermal recording head, the head part on one resistor row side and the head part B on the other resistor row side are made separately, and the common '11t4M3.3 comrades are all butted together. Unify with.

In the thermal recording head according to the present invention configured as described above, one coloring dot is completely formed on the thermal recording paper using the two rows of resistors 2, so that one dot If on the thermal recording paper can be made large enough. Since the folded antibodies are arranged in a staggered manner, the coloring line becomes a continuous line, so that it is possible to color the heat-sensitive recording paper without any problems. Furthermore, since the color development line is a continuous line, the color density is not affected by the color development surface quality.

Furthermore, by dividing the resistors into two rows, the resistor density for one row is halved and the shape of each resistor 2 can be made larger, so there is no need to increase the power density even when increasing recording density. 5. Shortening of the life of the resistor can be alleviated, that is, the density of the resistor can be increased.

In addition, in this embodiment, one part of the substrate forming one resistor array and one substrate forming the entire resistor array of the other
Since the roller 6 and the resistor 2 in each row are bent at an angle that allows good contact between the roller 6 and the resistor 2 in each row around the abutting portion 5 of the common electrodes 3, 3, the resistor 2 in each row and the thermal recording paper This allows for good contact with the printer and improves print quality.

In addition, when manufacturing the thermal recording head, head parts A and B can be made separately, so the area of the unit head is reduced to half.
Since it is related to the defective area due to defects, it has the effect of improving the yield t.

〔Effect of the invention〕

As explained above, according to the present invention, one colored line is formed on the thermal recording paper by the heating resistors arranged in two rows, so that the thermal recording paper can be colored throughout. Furthermore, high density recording can be achieved without shortening the life of the heat generating resistor.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, FIG. 1 is a plan view showing a thermosensitive recording medium according to the present invention, and FIG. FIG. 3 is a schematic side view showing the relationship between the thermal recording head and the roller for pressing the thermal recording paper. ]...Ceramic substrate, 2...Heating resistor, 3...
- Electrode (common electrode), 3'...electrode, 4...protective film, 5...butt portion of common electrodes, 6...roller for pressing thermal recording paper. Agent Tadashi Akimoto, Patent Attorney Figure 1 Page 2 Figure 3 Figure 3 Continued from page 1 @ Inventor Yoritomi Bibun 29 Yoshida-cho, Totsuka-ku, Yokohama Hitachi, Ltd., Institute of Industrial Science

Claims (1)

[Claims] 1. A thermal recording head in which a heating resistor and an electrode for supplying power to the heating resistor are formed on a substrate, and a protective film is entirely formed on both, the heating resistor The heating resistors are arranged in two rows by using one of the electrodes that supplies all the power as a common electrode, and the common electrodes are butted against each other, and the heat-sensitive recording paper is passed through the two rows of the heating resistors. A thermal recording head characterized in that a single colored line is formed by forming a single colored line. 2. A heat-sensitive recording according to claim 1, characterized in that the heat-generating resistors in one row and the heat-generating resistors in the other row are arranged in a staggered manner, shifted by half a pitch from each other. head. 3. In claim 1 or 2, a part of the substrate on which all of the heat generating resistor rows are arranged on one side and a board part on which all of the heat generating resistor rows on the other side are arranged are thermally recorded. The thermal recording head is characterized in that the paper pressing roller is bent at the butt part of the common electrode at an angle that allows good contact with the heating resistor of each row. 4. A thermal recording head according to claim 1 or 2, characterized in that the head portion on one heating resistor row side and the head portion on the other heating resistor row side are manufactured separately. .