JPH0692160B2 - Recording device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device that records an electric signal as a visible image.

2. Description of the Related Art Among various recording devices, a recording device of a type such as an electric discharge recording device, an electrolytic recording device, an electric thermal recording device, an electric transfer recording device, which is energized from an electrode needle, has high speed, storability of recording and economical efficiency. Are better. (Published by Japan Technology Center, Hardcopy Technology, June 1981). However, the print quality of these devices was not very good. That is, the resolution is not so good, and it is 5-6 dots / m.
m was common.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above recording apparatus, for example, the electric discharge recording apparatus, the discharge phenomenon itself has a higher resolution, and the recording speed is also higher.
If there is, it is possible to write for 1 second per A4 sheet, but the low performance is held down by the electrode head for writing. Since the tip of the electrode head (the portion that contacts the recording paper) becomes extremely hot, the electrode needle is projected. For this reason, a high-density (high-resolution) electrode head has a problem that it bends because it uses thin electrode needles. In order to deal with this problem, a method of thickening the electrode needles and staggering them has been adopted. 5-6 by this
Dots / mm were realized. It was considered impossible any more. In order to break through the limit, an embedded electrode head has been devised in which the electrode needle does not protrude. A high density groove is formed on a support mainly composed of a material having excellent heat resistance, lubricity, wear resistance, and workability such as hexagonal boron nitride, and it is used as an electrode needle.
An electrode head having a structure in which a conducting wire having a diameter of 30 μ is put in a groove and a lid is appeared. However, this method is extremely difficult to manufacture due to the precision processing and the use of fine wires. In addition, the gap between the recorded dots was wider than the dot diameter. In the case of discharge recording, lower the impedance of the electrical signal source and connect a capacitor between each electrode needle and the ground to make the dot diameter larger than the diameter of the electrode needle and I was filling a gap.

The problem associated with such a high-density electrode head is not only the discharge breakdown recording device, but also a common problem with other recording devices, for example, a recording device of a type in which electricity is supplied from an electrode needle such as an electrolytic recording device or an energization recording device. there were.

Means for Solving the Problems In order to solve the above problems, the present invention is a recording apparatus for recording an image on a recording paper using an electrode head having electrode needles, wherein the electrode head has a plurality of grooves on the surface. The electrically insulating first and second supports having the above-mentioned structure have the groove troughs and peaks meshing with each other, and the electrode needles are provided in the troughs of the first and second support-like grooves. It is a thing.

Effect The present invention provides a recording apparatus having a high resolution, easy to manufacture, and thus inexpensive and highly reliable. Further, in the electric discharge recording device, the capacitor is omitted and an inexpensive recording device is provided.

Example The present invention is characterized by an electrode head. The present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of an electrode head used in the recording apparatus of the present invention.

In FIG. 1, 101 is an electrically insulating first support, and 102 is an electrically insulating second support. Grooves arranged at a constant pitch are processed on the surfaces of the first and second electrically insulating supports. This first support and second
The supports are arranged such that the peaks and valleys of the grooves mesh with each other, and the valleys 104 are provided with the electrode needles 103. As for the material of the support, in addition to electric insulation, a material that is soft enough to not damage the surface of the recording paper because it travels in contact with the recording paper is preferable. For example, a hexagonal boron nitride sintered body or gypsum is preferable. Further, in the case of a composite with a resin or the like, it is preferable to use hexagonal boron nitride, calcium carbonate, talc or the like as a filler.

The electrode needle 103 is a commonly used conductor wire having a circular or rectangular cross section.

Copper wire is the easiest to handle. Among them, a coated copper wire (often called an enameled wire) is preferable in order to prevent a short circuit between adjacent electrode needles when the electrode needles are arranged in high density.

Tungsten wire, nickel wire, or stainless wire may also be used. However, nickel wires are expensive, and other wires are difficult to connect to electrical circuits. Reference numeral 105 is a part of the electrode needle which is taken out from one side of the support for connecting with an electric circuit and serves as a lead portion. First support 101 and second support 102
It is easy to fix the electrode needle 103 and the electrode needle 103 with resin. This resin preferably fills the entire space formed by the first support, the second support and the electrode needle. Otherwise, for example, in the case of FIG. 1, when it is attached only to the portion that is not relevant to the lower recording, the mechanical strength becomes weak.

The first support and the second support may be exactly the same. However, the width of the crests and valleys of the groove is limited. The width of the peaks must be narrower than the width of the valleys. Otherwise, the crests and troughs of the groove cannot be engaged. The electrode needle 103 may be inserted after the first support member and the second support member are engaged with each other, or the electrode needle may be provided on each of the first and second support members before the engagement. And then bite together.

It suffices that the depth of the groove (= the depth of the valley = the height of the peak) is deeper than the diameter of the electrode needle to be provided, but it is easiest to prepare 2 dots for the delay time given to the electric signal (memory etc.). Therefore, about twice the diameter of the electrode needle is preferable. Depending on the recording apparatus, the electrode head may be tilted with respect to the surface of the recording paper in order to improve the running property.
In such a case, the depth of the groove may be reduced in order to make the interval between the first and second rows of the staggered pattern the same as the dot interval.

That is, the depth of the groove is deeper than the dimension of the diameter of the electrode needle and shallower than double.

Such an electrode head is arranged as shown in FIG. 2 for recording. In FIG. 2, the electrode head 201 is pressed against the recording paper 202 and moved relatively. After applying from the recording, the crests and troughs of the grooves were meshed with each other under a microscope, and then tightened with a device used for machining, and allowed to stand at room temperature to cure the resin.
The tip portion was polished so as to come into contact with the recording paper, and each of the lead portions of the covered copper wire on the opposite side was connected to a signal generating circuit. Then, this is pressed against the discharge recording paper and run at 3 cm / sec, the recording paper is grounded, and the electric signals given to the first and second rows of the zigzag are given a proper delay time, and the drive circuit shown in FIG. When an electric signal was applied, a fine print without gaps between the recording dots of 16 dots / mm was obtained. FIG. 2 shows only the output portion of one of the 128 drive circuits. 301 is an NPN transistor and 302 is a protective resistor, and 100 ohms were used in this experiment. Transistor 201
The emitter of was connected to the negative power supply (-45V), and the print signal was input to the base. The other end A of the resistor 302 is connected to one of the lead portions of the electrode needle shown in FIG.

Comparative Example 1 In Example 1, the grooves on the first support were formed at 65 μ pitch and 30 μ pitch.
With a width of 30 μm, a 25 μm covered conductor is provided on a part of the paper to form a return electrode 203, and an electric signal is applied from an electric signal source 204 between the return electrode 203 and one electrode needle of the electrode head. Although not shown in the figure, there are a plurality of electrode needles and electric signal sources. When applying an electric signal, the electrode head used here does not have the electrode needles arranged in a line, and it is necessary to give an appropriate time delay to the electric signal applied to each electrode needle. Aside from the electrode head, some recording apparatuses that perform such a recording method have been conventionally known. For example, discharge recording, energization heat sensitive recording, energization transfer, electrolytic recording, electrostatic recording and the like.

Example 1 Plate-shaped (length 20 mm x width 20 mm x) as the first and second supports
A hexagonal boron nitride sintered body having a thickness of 2 mm was prepared. The width of this surface is cut by a dicing saw for semiconductor wafer processing.
65μ depth 125μ pitch 125μ (8 / mm) groove was cut from end to end. This hexagonal boron nitride sintered body has a diameter of 60 mm in the groove.
Wrap the coated copper wire of μ 64 times with a wire winding machine, put a commercially available room temperature curing epoxy resin (Arubadite manufactured by Ciba Co.) on it, and stroke the resin to form a hexagonal boron nitride without grooves. An electrode head fixed with a lid of a sintered body plate was prepared. A similar experiment was performed using the same drive circuit as in Example 1, and 16 dots / mm of dots were obtained, but the dot diameter was small and gaps were formed between the dots, apparently reducing the density of printing. It was To fill the gap between the dots, at least 0.0046 μF (optimum of 0.1
01 μF) condenser was required.

In Example 1, a coated copper wire was used as the wire, but it is obvious that a bare copper wire or another conductive wire may be used. However, in that case, measures are taken so that the wires arranged in parallel do not come into contact with each other. It is obvious that the wire may have any cross section, but a circular shape is common and the price is low. Further, in the above-described first embodiment, the winding method is adopted as the manufacturing method of the electrode head, but in the apparatus of the present invention, there is no need to stick to this.

Example 2 In Example 1, after the epoxy resin was not applied to the entire meshing portion, the winding was first assembled and then combined and fixed with a vise, and then an acrylic instant adhesive (trademark Aron Alpha) was used for the first support and the second support. It was fixed by pouring it into the space formed by the body and the electrode needle. When an experiment similar to that of Example 1 was conducted using this electrode head, almost the same result was obtained.

Example 3 The resin was assembled in the same manner as in Example 1 except that the resin was not applied to the entire meshing portion and only the portion near the lead portion was formed. When the same experiment as in Example 1 was conducted using this electrode head, almost the same result was obtained.

Example 4 90% by weight of hexagonal boron nitride powder and an epoxy resin (bisphenol A type resin) were mixed and cured to form a plate-like first (length 20 mm × width 20 mm × thickness 2 mm) first, and A second support was prepared.

The first support and the second support were subjected to the same groove processing as in Example 1 and assembled in the same manner. When the same experiment as in Example 1 was carried out, the result was not as good as in Example 1, but the print quality was not so bad that the dots were slightly trailed.

Comparative Example 2 Prepare a plate-shaped (length 20 mm x width 20 mm x thickness 2 mm) support made of a composite obtained by mixing and curing 90% by weight of hexagonal boron nitride powder and an epoxy resin (bisphenol A type resin). did. Grooving and assembly were performed in the same manner as in Comparative Example 1, that is, a 16-dot / mm single-row array electrode head was prepared. The lid was also the same composite as the support. When an experiment similar to that of Example 1 was conducted using this electrode head, the same result as that of Comparative Example 1 was obtained, and a capacitor was required in the signal generating circuit to fill the gaps between the dots.

Example 5 80% by weight of talc powder and an epoxy resin (bisphenol A
A plate-shaped (length 20 mm × width 20 mm × thickness 2 mm) first and second supports made of a composite obtained by mixing and curing type resin) were prepared. Assembling and performing the same experiment as in Example 1, the print quality was somewhat inferior to that in Example 1, but there was no electrical short circuit between adjacent electrode needles, nor was the dot row disturbed, and practically sufficient. It was usable.

Comparative Example 3 80% by weight of talc powder and an epoxy resin (bisphenol A
A plate-shaped (length 20 mm × width 20 mm × thickness 2 mm) support made of a composite obtained by mixing and curing type resin was prepared.
Grooving and assembly were the same as in Comparative Example 1, ie 16 dots
An electrode head with a single-row array of / mm was made. The lid was also the same composite as the support. When an experiment similar to that of Example 1 was conducted using this electrode head, short-circuits frequently occurred between adjacent electrode needles, and dots to be arranged in a row were disturbed, and printing of characters was impossible. In particular, short circuits often occurred in places with many recording dots.

EFFECTS OF THE INVENTION As is apparent from the above description, in order to solve the above problems, the present invention is a recording apparatus for recording an image on recording paper using an electrode head having electrode needles, wherein the electrode head has a plurality of surfaces. The electrically insulating first and second supports having two grooves mesh with the troughs and peaks of the respective grooves, and the electrode needles are provided in the troughs of the first and second support-like grooves. It is to be configured.

This provides a recording apparatus with high resolution and high reliability. Further, in the case of the discharge recording apparatus, the capacitor is omitted and an inexpensive apparatus is provided.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an electrode head used in the recording apparatus of the present invention, FIG. 2 is a front view showing a recording state of the recording apparatus of the present invention, and FIG. 3 is an output portion of a signal generating circuit used in an experiment. It is a circuit diagram. 101 ... Electrically insulating first support, 102 ... Electrically insulating second support, 103 ... Electrode needle, 104 ... Valley, 15 ... Lead part, 201 ... Electrode head, 202 ...... Recording paper, 203 ……
Recording electrode, 204 ... electric signal source, 301 ... transistor,
302 …… Protective resistance.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazushi Ono 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Tetsuhiro Sano, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. 56) References JP-A-59-124859 (JP, A)

Claims (9)

[Claims] 1. A recording apparatus for recording an image on a recording paper by using an electrode head having electrode needles, wherein the electrode head has electrically insulating first and second supports having a plurality of grooves on the surface. A recording apparatus, characterized in that the body meshes with the troughs and ridges of the respective grooves, and the electrode needles are provided in the troughs of the grooves of the first and second supports. 2. The electrode head has a structure in which a space formed by the first support, the second support and the electrode needle is filled with resin. The recording device described. 3. The electrode head according to claim 1, wherein the first support, the second support and the electrode needle are partially fixed by resin. Recording device. 4. The recording apparatus according to claim 1, wherein the structure of the electrode head is a combination of a first support and a second support having the same shape. 5. An electrode head having a structure in which the depths of the first support member and the second support member-like groove are deeper than the diameter dimension of the electrode needle and shallower than double. The recording apparatus according to claim 1. 6. The recording apparatus according to claim 1, wherein the first support and the second support of the electrode head are made of a sintered body of hexagonal boron nitride. 7. The first support and the second support of the electrode head are composites composed of hexagonal boron nitride powder and a thermosetting resin. The recording device according to 1. 8. The recording apparatus according to claim 1, wherein the electrode needle of the electrode head is a covered conductive wire. 9. The recording apparatus according to claim 8, wherein the electrode needle of the electrode head is a covered conductive wire.