JPS6068955A - Electrode head - Google Patents

Abstract

PURPOSE:To obtain an electrode head enabling a high resolution image by fixing a long and thin electric conductor on a fixing material containing hexagonal boron nitride by burying or lamination so as to expose the tip thereof. CONSTITUTION:A stripe-shaped electric conductor 31 is fixed on a molding 32 obtained by mixing and hardening a thermosetting resin and hexagonal boron nitride by lamination or burying. The electrode head preferably uses the molding with the content of hexagonal boron nitride powder of 20-90wt%, preferably 40-80wt% as fixing material. This allows a thin electrode and provides an electrode head of a long life with a high resolution.

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 for 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 needle 14 is buried in resin and the electrode button is not exposed (protruding), the area around the electrode needle 14 is destroyed by heat, and dust generated during recording accumulates there, damaging the insulation between the electrodes and making them unusable. I can't write anything. 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.

OBJECT OF THE INVENTION An object of the present invention is to provide a long-life electrode head that 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 containing hexagonal boron nitride that fixes the electrical conductor, and records data by exposing the tip of the elongated electrical conductor. Recording is performed on the recording medium by passing electricity between the recording medium and the body, thereby realizing high resolution recording and extending the lifespan.

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

[Example I]

22.23 is a sintered body (for example, a copper wire) of orthogonal boron nitride (for example, a Denka boron nitride sintered body manufactured by Denki Kagaku Kogyo ■). The electrode head shown in the figure is a hexagonal boron nitride sintered body 22 made by Denka Kagaku Kogyo ■ and grade HC, with a pitch of 100/7m, a groove width of 65μm, and a groove depth. A groove with a diameter of 60 μm is placed in the groove, and the wire diameter is 60 ttm.
After embedding the coated copper wire, the coated copper wire is pressed and fixed with a sintered body 23 equivalent to the sintered body 22 of the aforementioned macrogonal boron nitride.

When this electrode head is attached to a recording device using discharge rupture recording paper and printing is performed, it has similar characteristics.

stability) is excellent.

■ Dust generated during recording is difficult to adhere to.

■ Can be printed on discharge destruction recording paper without damaging it.

■ Does not deteriorate due to heat during recording.

■High resolution recording is possible.

These are due to the characteristics of hexagonal boron nitride, which include excellent lubricity, heat resistance, electrical insulation, abrasion resistance, and workability.

[Example U]

The hexagonal boron nitride content of the hexagonal boron nitride sintered body, which is the fixing material of the electrode head having the same structure as in Example 1, was 65.7.
Example 1 Using sintered bodies with different weights of 0,75, 8.0, 85, 90°95.99, and 100% by weight as the fixing material,
Table 1 shows the results of evaluation by printing the electrode head on discharge breakdown recording paper using the same method as above.

Margin yellow table below 1. h-BN content and evaluation as an electrode head [Yellow h-BN: Hexagonal boron nitride In Table 1, printing quality refers to the stability of the dot shape after printing 50,000 characters as described above. The resistance to dust is the degree of dirt on the tip of the electrode head after printing 60,000 characters.The hardness is determined by the degree of dirt on the tip of the electrode head after printing 60,000 characters.
The ability to print on discharge rupture recording paper without damaging it was evaluated. Flame retardancy was evaluated in accordance with UL Standard 94, and the thickness of the test piece was evaluated in inches. The workability of the sintered body rTz Ikh Jb -) 4 (-? 'r
X. As is clear from Table 1, when the hexagonal boron nitride content was 65% by weight, the discharge breakdown recording paper was scratched by the fixing material during printing, resulting in poor print quality.

An electrode head using a sintered fixing material with an orthogonal boron nitride content of 70% by weight or more had excellent print quality without any scratches caused by the fixing material on the discharge rupture recording paper.

However, at 70% by weight, scratches may occur depending on the state of contact between the electrode head and the discharge rupture recording paper. Also, 1
Since it is difficult to sinter a sintered body of 0.00 weight%, the hexagonal boron nitride sintered body suitable for the fixing material of the electrode head is one containing 75 to 99% by weight of hexagonal boron nitride. good.

[Example ■]

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

In Fig. 3, 3i1'j is a strip-shaped electrical conductor (e.g. copper), 32 is hexagonal boron nitride and a thermosetting resin (e.g. Denka boron nitride powder manufactured by Denki Kagaku Kogyo ■) and epoxy type. It is a molded product made by mixing and hardening resins. The electrode head in the figure is from Denki Kagaku Kogyo@
It is a molded product made by mixing and curing GP-grade hexagonal boron nitride powder and epoxy resin (bisphenol A type resin), which is manufactured by Denka boron nitride powder, and contains 50% by weight of orthogonal boron nitride. be.

After laminating 15 μm of copper on the molded body by electroless plating, striped electrodes (line spacing 50/7 m, line width 50 μm) were formed by photoetching.

Even when this electrode head is attached to a recording device using discharge rupture recording paper and printing is performed, the same characteristics as in Example 1 are obtained. Next, the content of orthogonal boron nitride was reduced to 0 in the epoxy resin.
．． 10, 20, 30, 40°60.60.70.80.
The electrode head using each molded body cured at 90.95% by weight as a fixing material was attached to a recording device using discharge breakdown recording paper as described above, and evaluated by printing on the discharge breakdown recording paper. The results are shown in Table 2.

Margin table 2 below. h-BN content and electrode head evaluation Table 2 shows the printing quality, dust resistance, hardness, flame retardancy,
Processability was evaluated using the same evaluation method as in Example 11. As is clear from Table 2, when the content of hexagonal boron nitride is 10% by weight or less, the area around the electrode is destroyed as described in the conventional example.
If dust generated during recording accumulates there, and the insulation between the electrodes is damaged, or the electrodes become deformed or disconnected, and if the weight exceeds 95%, it cannot be maintained as a molded body and should not be evaluated as an electrode head. I couldn't do it.

From the above, the content of hexagonal boron nitride powder is 20
An electrode head using ~90% by weight of the molded body as the fixing material is good, but more preferably an electrode head using 40~80% by weight of the molded body as the fixing material exhibits a greater effect. As described above, electrical conductor wires are embedded in a sintered body containing hexagonal boron nitride, and the electrical conductor is laminated on a molded body made of a mixture of thermosetting resin and orthogonal boron nitride to form a desired electrode pattern. I mentioned the formed electrode head,
The electrode head is not limited to these, and any hexagonal nitride water electrode head may be used.

Although this embodiment has been described as an electrode head for a recording device using discharge breakdown recording paper, it is not possible to use it as an electrode head for other recording devices, and other electrical conductors may be used. Examples include stainless steel, nickel, tungsten, etc.

Effects of the Invention As is clear from the above explanation, the present invention comprises an elongated electrical conductor and a fixing material containing hexagonal boron nitride,
The electric conductor is embedded in the fixing material or fixed in a laminated manner, and the tip of the electric conductor is exposed, so that the area around the electric conductor is not destroyed and dust generated during recording does not adhere. , the printing quality is excellent because the recording paper is not scratched even if it is pressed against the recording paper and moved. In addition, conventionally, the lifespan was determined by the length of the protruding electrode needle, and as the phase electrode needle becomes thinner for high resolution, the protruding electrode needle cannot be maintained unless the protruding amount of the electrode needle is shortened. However, in the electrode head of the present invention, the electrodes do not need to protrude and are buried or laminated in the fixing material, so the electrodes can be thin and the length of the electrodes can be reduced. Moreover, since the electrode head can be freely selected, it is possible to obtain an electrode head with high resolution and long life.

[Brief explanation of the drawing]

FIGS. 1A and 1B are perspective views of a conventional electrode head, and FIGS. 2 and 3 are perspective views of an electrode head according to an embodiment of the present invention, respectively. 11.14... Electrode needle, 12... Resin fixing material, 13... Lead, 21.31...
...Electrical conductor, 22.23... Sintered body containing hexagonal boron nitride, 32... Molded body mixed with hexagonal boron nitride and thermosetting resin. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (5)

[Claims] (1) Consisting of an elongated electrical conductor and a fixing material containing hexagonal boron nitride that fixes the electrical conductor, the tip of the elongated electrical conductor is exposed and current is passed between it and the recording medium. 1. An electrode head for recording on a recording medium. (2) The electrode head according to claim 1, wherein the fixing material is a sintered body containing at least 70% by weight of hexagonal boron nitride. (3) The fixing material is composed of at least hexagonal boron nitride and a thermosetting resin, and contains 20% by weight or more of the macrogonal boron nitride.
The electrode head according to claim 1, wherein the electrode head is a molded body containing 90% by weight. (4) The fixing material has a groove, and by embedding the wire of the electrical conductor in the groove, the wire rod of the electrical conductor is inserted into the 121 m1 area in front of the rope. 2. The electrode head according to claim 1, characterized in that: (5) The electrode head according to claim 1, wherein the elongated electrical conductor is a striped electrical conductor.