JPS5922770A - Discharge recording head and fabrication thereof - Google Patents

Abstract

PURPOSE:To obtain the titled head light in weight, small in size and low in cost, by a method wherein each patterns of a metal rod and a signal wire are formed on a flexible print board and resin is built up in the vicinity of the film of a slightly protruded fine head part. CONSTITUTION:A discharge head pattern is formed on a flexible print board 5 and, after the periphery of the discharge head pattern is cut, the leading end film 5' on the rear surface of the fine head part 2 of a discharge head 1 is peeled. After the peeled leading end film film 5' is cut by a knife, the fine head part 2 is grasped by jigs 10 and resin 6 is built up. The highly precise fine head can be easily formed on the flexible print base board by etching.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric discharge recording head that transfers and records various information onto a recording paper by electric discharge destruction of the medium.

Discharge destruction recording is a method in which a current is passed between two media in contact with each other, and microdischarge fractures caused by the difference in electrical resistance of the media are used for recording.

That is, this method applies the principle that micro-destruction of the medium collides with and adheres to the recording paper by causing discharge micro-destruction in a state where the medium and the recording paper are loaded. Therefore, by finely controlling this discharge microdestruction (4), it is possible to perform the function of a printer. However, in order to fully function as a printer, it is a matter of deciding how to organize the electrodes, and the quality of the electrodes greatly affects the functionality of the printer. Generally, as an anode, a metal hole with a diameter of 200 to 300 μm and a diameter of 4 to 6 mm are used.
A cathode with a density of 1/ml is used as a cathode at a slightly distant position from the cathode. However, recently there has been a demand for anodes to be denser, and when the density of dots reaches 10/U, various problems arise. That is, when the dot density is 10 dots/day, the metal rod must have a diameter of 100 .mu.m or less and the pitch dimension must also be 100 .mu.m or less, making the mounting difficult. In other words, how to maintain the insulation between the metal rods, how to maintain the distance between m degrees, how to mount and secure the metal ports and ports, and how to connect the signal wires to the metal ports and ports. There are problems such as these, and even if it is possible to supply a few prototypes, the price will be low at first, and if you consider it as a product, it is almost impossible to manufacture it. It is.

In order to eliminate such drawbacks, the present invention forms each pattern of conventional metal rods, signal lines, etc. on a flexible printed board, and hides the pattern corresponding to the electric mulberry part slightly longer than the resin film. explain.

FIG. 1 shows a discharge record showing one embodiment of the present invention.

FIG. 2 is a perspective view of the card, and a sectional view of the card, medium, and recording paper showing the recording state. In FIG. 1, l is a flexible printed circuit board made of a flexible printed board, and a fine portion 2, a line portion 3 connected thereto, and a connector portion 4 are formed on a resin film 5. There is. Note that, in terms of detail, the dot portion 2 is slightly longer than the resin film 5, and the vicinity of the head portion 2 is covered with the resin 6. In FIG. 2, reference numeral 7 denotes a medium, which is set together with the recording paper 8, and is set together with the fine head part 2 at the tip of the head l.
so that they touch each other lightly. During recording transfer, the current flowing through the connector part 4 and the line part 3 of the lead 1 flows to the °C medium 7 through the lead part 2. At this time, depending on the direction of the current, an electrical resistance X is applied to the medium 5. Therefore, discharge micro-destructions occur in the vertical direction of this storage medium 7. The minute pieces of the medium 5 generated by this discharge destruction collide with the recording paper 8 and land on it. That is, by finely controlling this discharge breakdown, desired printing can be achieved, and the printer can function as a printer.

As described above, according to the present invention, it is possible to extremely easily form a fine head with an extremely high precision on a flexible printed circuit board-1 by etching. ° It is important to form many patterns with simple precision and precision.
As a result, the printing quality can be greatly improved. That is, it is possible to easily achieve not only the growth of 4 to 6 plants per square, but also a density of 10 plants per 11JI. Furthermore, compared to the conventional method, there is no need to process the terminals of the F section for each fine detail, and it is sufficient to directly insert the connector section into a commercially available connector, resulting in an extremely large reduction in assembly man-hours. Also in mounting, there is no need to insulate the dots of each microscopic part, and the mounting cost can be reduced. Since the dots formed by etching are uniform in length and have an appropriate slight roundness at the tip, the medium will not be damaged when the dots come into sliding contact with the medium. Print quality also depends on the contact force between the media and the edges.
Generally, several hundred grams of force was required. But on to the books.

As a result of the high precision and high density achieved, it was possible to print with only a few grams of contact force. By reducing the contact force between the media and the edges, the structure of the printer can be simplified.
It is also possible to prevent dust from accumulating in the dot portions and short circuits between patterns. In addition, by reducing the contact force, it is possible to prevent consumption of the medium and wear of the grooves and improve the durability of the copper.

Next, a method of manufacturing a discharge recording device according to the present invention will be explained.

Figure 3 shows a discharge on a flexible printed board.

Fig. 4 is a perspective view showing the state in which the dot pattern has been formed, Fig. 4 shows the state in which the periphery of the discharge head pattern has been cut, and Fig. 5 shows the state in which the discharge head pattern is cut, and the tip film on the back of the do part is Figure 6 is a perspective view showing the peeled tip film being cut with a knife, etc. Figure 7
The figure is a perspective view showing a state in which the do part is held by a jig and resin is applied to the fine part. To explain the manufacturing of the discharge head step by step, as shown in FIG. 3, a discharge pattern is formed on the flexible printed board 1. The material for the discharge pattern may be a general copper pattern, but stainless steel, molybdenum, carbide, etc. are selected depending on the purpose of use, taking wear resistance into consideration. In FIG. 4, the resin film 5 is cut along the outer periphery of the discharge-\rad pattern in FIG. Note that the tip film 5' of the dotted portion 2 is finely cut so as to be longer than the dotted portion 2 by about 1On. In Fig. 5, the continuation section 3 and the tip film 5'
, and slowly peel off this tip film 5' to the desired position. Typical etch/co-turf width (
In the case of several cranes, it is secretly difficult to remove the pattern and film part, but in the case of fine and deformed parts, it is possible to remove it with careful work. In FIG. 6, the film 5' is cut into fine pieces by pressing the knife 9 to the desired cutting position and pulling the film 5' in the direction of the arrow.

The dome 2 can be made slightly longer than the film 5'.

In FIG. 7, the tip of the do portion 2 is held by a jig 1O, and resin 6 is placed near the do portion 2. By applying the resin 6, the do portion 2 can be made finer and stronger.

Incidentally, it is also possible to apply the resin by using a tape or the like instead of the jig IO described above.

As described above, the structure of the discharge head and the manufacturing method thereof have been described.The discharge head of the present invention is extremely light and compact, and has a discharge head that significantly reduces manufacturing costs and has extremely good printing quality. This makes it possible to provide the following.

[Brief explanation of the drawing]

FIG. 1 shows discharge recording using an embodiment of the present invention. FIG. 2 is a cross-sectional view of the medium and recording paper showing the recording state; FIG. 3 is a perspective view showing the discharge pattern formed on the flexible printed board;
Figure 4 is a perspective view showing the state in which the periphery of the discharge head pattern has been cut, Figure 5 is a perspective view showing the state in which the tip film on the back surface of the fine head portion of the discharge head has been peeled off, and Figure 6 shows the peeled tip film. A perspective view showing the state of cutting with a knife, etc., and FIG.
FIG. 3 is a perspective view showing a state in which resin is piled up. In the figure, l indicates discharge recording, C, 2L fine head section, 3
1 is a line section, a 4-wire connector section, 5 is a resin film, 5' is a leading edge film, 6 company resin, 7 is a medium, 8 is a recording paper, 9 is a knife, and 10 is a jig. The arrow indicates the direction in which the tip film 5' is pulled. Figure 1 Figure 2

Claims (1)

[Scope of Claims] ■) Each pattern of a plurality of fine grooves with extremely fine shape accuracy, line parts connected to them, and connector parts, such as copper, stainless steel, molybdenum, tungsten, carbide, etc. The film is formed on a flexible printed board made of metal and resin film, and the tip of the fine head part is slightly protruded from the resin film, and resin is applied to the fine part near the film at the dot part. To the discharge record, de. 2) Cut the resin film slightly larger than the tip of each pattern formed on the flexible printed board, and hold together the line portion and the tip film portion that is slightly longer than the do portion.
After peeling off the tip film portion slightly between the edges and the edges, cutting the tip film portion at a position slightly shorter than the edge portion, and applying resin to the edge portion and the edge film portion. A method for manufacturing a characteristic discharge recording head.