JPS6068954A - Electrode head - Google Patents

Abstract

PURPOSE:To obtain an electrode head which enables a high resolution recording by burying or laminating a long and thin electric conductor into or on a specified fixing material in a striped form so as to expose the tip thereof. CONSTITUTION:A long and thin electric conductor 21 is fixed on a fixing material 22 made of a thermosetting resin containing a mixture of hexagonal boron nitride and talc by burying, lamination or the like. The tip of a stripe-shaped electric conductor 21 is exposed and electrically energized with a recording body. The molding containing 5wt% or more of hexagonal boron nitride with 25-90wt% of hexagonal boron nitride and talc in total may be used for the material fixing the electrode head.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electrode head for recording electrical signals on a recording medium.

Conventional configurations and their problems In recent years, various terminals have been required due to office automation. Among these, there is a great demand for recording devices that convert electrical signals into visible images, so-called printers.

Conventionally, recording devices have been manufactured using various methods. A recording device using a discharge breakdown recording paper consists of a vapor deposited aluminum layer, a black layer, and a base paper layer.The vapor deposited aluminum layer of the discharge breakdown recording paper is grounded, and an electrode to which a voltage is applied is brought into contact with this vapor deposited aluminum layer. The vapor-deposited aluminum is removed by heating or discharge destruction to expose the underlying black layer and recording is performed. Therefore, in order to perform good writing, the writing electrodes are made so that the electrode needles 11 are exposed to ensure reliable contact as shown in FIG. 1A. Here, 12 is a fixing material made of resin, and 13 is a lead. In the case shown in Figure 1B, where the electrode needles are buried in resin and are not exposed (protruded), the area around the electrode needles 14 is destroyed by heat, etc., and the debris generated during recording is broken and the insulation between the electrodes is broken. It is damaged and cannot be written properly. For this reason, the protruding electrode needles had to be made of a strong material, and a thick and hard material had to be used, making it difficult to create multiple needles.

OBJECTS OF THE INVENTION An object of the present invention is to provide a long-life, inexpensive electrode head that eliminates the above-mentioned conventional drawbacks and enables high-resolution recording on a recording medium.

Structure of the Invention The electrode head of the present invention includes an elongated electrical conductor and a fixing material made of a thermosetting resin containing a mixture of hexagonal boron nitride and talc. The striped electrical conductor is fixed by embedding or laminating in a fixing material containing a mixture of talc and talc, and recording is performed on the recording medium by exposing the tips of the striped electrical conductors and passing current between them and the recording medium. This makes it possible to achieve low cost, high resolution recording, and a long lifespan.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Example 1] Body 22.23 is a molded body made by mixing a mixture of hexagonal boron nitride and Kururi with a thermosetting resin and hardening the mixture.

The electrode head shown in the figure is made of Denka boron nitride powder manufactured by Denki Kagaku Kogyo Co., Ltd., a mixture of grade GP hexagonal boron nitride powder and talc powder with a purity of 99% or higher manufactured by Nippon Talc. ) and hardened, containing a mixture of hexagonal boron nitride and talc in an amount of 60% by weight (of which hexagonal boron nitride accounts for 20% by weight). A dicing machine was used for the molded body, and the pitch was 10.
After making a groove of 0 μm, groove width 66 μm, and groove depth 60 μm and embedding a coated copper wire with a wire diameter of 6 μm in the groove, the mixture of hexagonal boron nitride and talc was mixed with a thermosetting resin. A molded body 23 equivalent to the cured molded body 22
The coated copper wire is fixed in place.

When this electrode head is attached to a recording device using discharge rupture recording paper and printing is performed, the following characteristics occur.

■ Print quality (stability of dot shape after printing 50,000 characters)
is excellent.

■ Dust generated during recording is difficult to adhere to.

■ Enables printing without damaging discharge destruction recording paper.

■ Does not deteriorate due to heat during recording.

■High resolution recording is possible.

■ It is inexpensive.

These are hexagonal boron nitride, which has excellent properties such as lubricity, heat resistance, electrical insulation, abrasion resistance, and workability. This is because a molded body mixed with the material talc was used as a fixing material for the electrode head.

Next, the electrode head obtained by the method described above using a molded body containing hexagonal boron nitride and talc in the epoxy resin as a fixing material with a different blending ratio is mounted on a recording device using discharge breakdown recording paper. The results were evaluated by printing on discharge breakdown recording paper, and the optimum blending ratio of hexagonal boron nitride and talc was examined. Before that, an electrode head using a molded body with varying contents of hexagonal boron nitride and talc in the epoxy resin as a fixing material was attached to the recording device, and the results of evaluation as an electrode head are shown in Table 1. and shown in Table 2.

In the margin table 1 and table 2 below, print quality is 5 as mentioned above.
The stability of the dot shape after printing 10,000 characters was evaluated. The degree of dust adhesion is determined by the degree of dirt on the tip of the electrode head after printing 50,000 characters. Hardness is an evaluation of whether printing can be done without damaging the discharge rupture recording paper when printing on the discharge rupture recording paper.Flame retardancy is based on UL standard 94, and the thickness of the test piece is measured in % inches. evaluated.

Workability refers to the ease of making a molded body and the ease of machining.

As is clear from Tables 1 and 2, in the case of hexagonal boron nitride, the effect starts to decrease from 20% by weight, and in the case of talc, the effect starts from 30% by weight.
It was effective from the zero weight section.

Although hexagonal boron nitride has the above-mentioned excellent properties, it is a very expensive material, making it expensive to use as an electrode head. On the other hand, although talc is an inexpensive material, it has slightly inferior properties to hexagonal boron nitride. Therefore, by combining hexagonal boron nitride and talc,
In order to find a blending ratio that satisfies both properties and cost, Table 3 shows the overall evaluation after checking the same items as in Tables 1 and 2.

If the total amount of hexagonal boron nitride and talc is less than 20% by weight, as mentioned in the conventional example, the area around the electrode will be destroyed, dust generated during recording will accumulate there, and the insulation between the electrodes will be damaged. However, it cannot be used as an electrode head due to deformation or disconnection. Further, the total amount of hexagonal boron nitride and talc could not be maintained as a molded body on a 95-weight plate, and it could not be evaluated as an electrode head.

From the above, the total amount of hexagonal boron nitride and talc is 2
It is preferable to use 5 to 90% by weight of the molded body as a fixing material for the electrode head. However, when evaluating an electrode head using a molded body as a fixing material in which the content of hexagonal boron nitride is less than 6% by weight and the content of talc is within the above range of 20% by weight or more, Although the excellent properties of crystalline boron nitride were not utilized, the content of hexagonal crystalline boron nitride was reduced to 5.
When the weight ratio was exceeded, the effects of the characteristics of hexagonal boron nitride appeared.

That is, it contains at least 5 weight percent of hexagonal boron nitride, and the total amount of hexagonal boron nitride and talc is 2.
It is preferable to use 5 to 90% by weight of the molded body as a fixing material for the electrode head.

[Example ■]

FIG. 3 is a perspective view of another embodiment of the invention.

In FIG. 3, 31 is a striped electrical conductor,
32 is a molded product made by mixing hexagonal boron nitride and talc with a thermosetting resin and hardening the mixture.

The electrode head shown in the figure is made of Denka boron nitride powder manufactured by Denki Kagaku Kogyo Co., Ltd., a mixture of grade GP hexagonal boron nitride powder and talc powder with a purity of 99% or higher manufactured by Nippon Talc. ) and cured by electroless plating on a molded body containing 5Q% by weight of a mixture of hexagonal boron nitride and talc (of which hexagonal boron nitride accounts for 20% by weight). After laminating copper to a thickness of 15 .mu.m, striped electrodes (line spacing of 50 .mu.m, line width of 50 .mu.m) are formed by photoetching. Even when this electrode head is installed in a recording device using discharge breakdown recording paper and printing is performed, the same characteristics as in Example 2 are obtained. Further, the results of evaluating the blending ratio of hexagonal boron nitride and talc were also the same as in Example 1.

As mentioned above, a molded body made of a material containing hexagonal boron nitride or talc and having properties such as lubricity, heat resistance, electrical insulation, abrasion resistance, and workability can be used as a fixing material for the electrode head. can be easily inferred from the present invention.

Although this embodiment has been described as an electrode head for a recording device using discharge rupture recording paper, it can be used as an electrode head for other recording devices. Further, the electrical conductor is not limited to copper, and other electrical conductors may be used. For example, stainless steel, nickel, tungsten, etc. can be coated.

Effects of the Invention A fixing material containing a mixture of boron and talc, wherein the striped electrical conductor is buried or laminated in the fixing material, and the tip of the striped electrical conductor is exposed. The printing quality is improved because the area around the striped electrical conductor is not destroyed, dust generated during recording does not stick to it, and the recording paper is not scratched even if it is pressed against the recording paper and moved. Are better.

In addition, conventionally, the lifespan was determined by the length of the protruding electrode needle, and the higher the resolution, the thinner the electrode needle became.
Unless the amount of protrusion of the electrode needles is shortened, the protruding electrode needles cannot be maintained, making it impossible to create an electrode head with high resolution and long life. Since the electrodes are buried or stacked, the electrodes do not need to be thin, and the length of the electrodes can be freely selected, resulting in an electrode head with high resolution and long life. Furthermore, by mixing hexagonal boron nitride with talc, an inexpensive electrode head can be obtained while maintaining the excellent properties of hexagonal boron nitride.

[Brief explanation of drawings]

1A and 1B are perspective views of a conventional electrode head, and FIGS. 2 and 3 are perspective views of an electrode head in an embodiment of the present invention, respectively. 11.14... Electrode needle, 12... Resin fixing material, 13... Lead, 21.31...
Electrical conductor, 22.23.32...A molded body made by mixing a mixture of hexagonal boron nitride and talc with a thermosetting resin and curing it.

Claims (4)

[Claims] (1) It consists of an elongated electrical conductor and a fixing material that fixes the electrical conductor by making a thermosetting resin containing a mixture of hexagonal boron nitride and Merck; An electrode head characterized in that it records on a recording medium by exposing it and applying electricity between it and the recording medium. (2) The fixing material contains at least 5% by weight of hexagonal boron nitride.
above, and the total amount of hexagonal boron nitride and Merck is 26
The electrode head according to claim 1, wherein the electrode head is a molded body containing 90% to 90% by weight. (3) A groove is formed in the stationary phase, a wire of an electrical conductor is embedded in the groove, and the wire side of the electrical conductor is fixed to the fixing material. electrode head. (4) The electrode head according to claim 1, characterized in that a striped electrical conductor is formed on the fixing material.