JPS61280950A - Recording head - Google Patents

Abstract

PURPOSE:To make etching process easier as well as reduce the cost of materials by a method in which recording electrode, e.g., tungsten electrode, etc., is used only for the tip portion, and usual lead wire is used for the portion of lead wire. CONSTITUTION:A tungsten foil is doubled on a flexible printed wafer 16 having excellent heat resistance and subjected to an etching process to form a recording electrode 17. A recording electrode 15 is bonded to a Cu-clad printed wafer 12 by butting the positions of a lead wire 11 and the electrode 17. In the structure of an elastic connector 18, conductive metal lines 20 are set at equal intervals on an elastic silicon rubber sheet 19 and an unhardened thermosetting adhesive 21 is applied between them. The lead wire 11 is connected with the electrode 17 with the metal lines 20 by using the connector 18. When the connection between the connector 18 and the lead wire 11 and the electrode 17 is pressed and heated,the sheet 19 is flexed,and under the condition that the conductors are exactly pressure-welded, the connector 18 is bonded and fixed by the adhesive 21.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field> This invention involves contacting and energizing a recording electrode to a resistive layer of a film composed of a resistive layer, a conductive layer, an ink layer, etc., and ink is normally drawn from the ink layer of the film. An electrical transfer recording method that transfers the image to paper, or a thermal recording method or a discharge recording method where a recording electrode is brought into contact with the resistive layer of a film consisting of a resistive layer and a conductive layer to color the thermal paper that is brought into close contact with the conductive layer of the film. The present invention relates to a recording head.

<Prior art> In dot matrix printing, due to the demand for improved printing quality, it is becoming increasingly necessary to increase the density of the recording head's recording needles. It is said to be necessary.

In response to higher density, in contrast to the conventional method of arranging thin metal wires to form a multi-needle recording electrode head, as shown in Figure 6, a multi-needle recording electrode 2 is formed on a printed circuit board 1 using a photo-etching method. A method has been proposed in which the recording electrode 2 is caused to run in contact with the recording paper 3 as shown in FIG. 7 to perform recording.

By the way, in the current transfer recording or discharge recording method, the recording electrode 2 is preferably made of a hard metal material with a high melting point and wear resistance, and specifically, tungsten or a tungsten alloy is most preferable. Used a lot.

However, tungsten is difficult to etch compared to materials such as copper, which are often used in printed circuit boards.For example, the pattern shown in FIG.
Etching using Book/III+1 takes several tens of minutes and has the disadvantage that a uniform product cannot be obtained if the line spacing or line width of the pattern changes in some places, or if the pattern area becomes large.

Further, there is a problem in that the material cost is significantly higher than that of printed circuit boards made of copper or the like.

<Object of the Invention> In order to solve the above-mentioned problems, the present invention uses a recording electrode such as a tungsten electrode only at the tip that directly applies recording, and the lead wire portion is a normal lead such as a printed circuit board attached to the body. It is an object of the present invention to provide a recording head that can be easily etched and can reduce material costs by forming the recording head into a wire.

<Structure of the Invention> In order to achieve the above object, the recording head of the present invention includes a recording electrode and a lead wire made of different materials, and a conductive strip on the surface of an elastic body. It is characterized by an elastic connector that connects the bodies by arranging them.

<Example> An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration in which a recording electrode portion 15 manufactured in a separate process is placed at the tip of a body-attached printed circuit board 12 formed by etching a bent patterned glue line 11. As shown in FIG. 1.5, this recording electrode part +5 is made by laminating tungsten foil to a flexible printed circuit board material 16 having excellent heat resistance, such as polyimide.
By etching, the recording electrode 17 is formed in a pattern consisting of a plurality of straight lines parallel to each other. The recording electrode section 15 is fixed to the printed circuit board [2] using the lead wire 1.
1 and the recording electrode 17 for alignment, as shown in FIG. 5, this is done by a method such as gluing.

Next, as a method of conducting conductive connection between the recording electrode 17 and the lead wire 11, an elastic connector 18 shown in FIG. 2 is used. The structure of the elastic connector I8 includes a silicone rubber sheet 19 which is an elastic body and metal strips 20 and 20 which are conductive strips.

... are arranged at equal intervals, each metal strip 20,20°.
...A thermosetting adhesive 21 before curing is applied between them. Using this elastic connector 18, the lead wire II and the recording electrode 17 are connected to the metal strip 20 as shown in FIG.
Connect with. In the case of this embodiment, the arrangement density of the metal strips 20 of the elastic connector 18 is twice the arrangement density of the recording electrodes 17, so that the precision of position alignment is not required. After performing this positional alignment, pressurizing and heating the connecting portions of the elastic connector 18 to the lead wires 11 and the recording electrodes 17 causes the silicone rubber sheet 19 to bend, and each conductor portion is securely connected by pressure contact. Connector 18 is adhesively fixed with thermosetting adhesive 2I.

The thickness of this elastic connector 18 is 0.2+
nm, and contact with the recording paper during recording cannot occur.

FIG. 4 shows the planar configuration of the recording head completed by the method detailed above, and FIG. 5 shows a side view of the tip configuration.

<Effects of the Invention> As is clear from the above, according to the present invention, since the recording electrode made of different materials and the lead wire are connected by an elastic connector, it is suitable for recording electrode materials such as electrical transfer recording and discharge recording. The recording electrode made of a high-melting-point, high-hardness metal material such as tungsten can be etched only in a small area at the tip of the recording head that is involved in recording, for example, in a uniform linear pattern, improving etching processability and improving the material. It is possible to reduce costs by 11 times.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the present invention in which the recording electrode part and the part where the lead wire is located are separated, Fig. 2 is a perspective view of the elastic connector, and Fig. 3 is a connection point using the elastic connector. 4 is a plan view of the completed recording head; FIG. 5 is a side view of the tip of the completed recording head; FIG. 6 is a plan view of the wiring pattern of a conventional high-density recording head; FIG. 7 is a plan view showing a state during recording using a high-density recording head. ! ■...Lead wire, 15...Recording electrode part,
17... Recording electrode, 19... Elastic body, 20.
...Metal strip.

Claims (1)

[Claims] (1) The recording electrode and lead wire are constructed using different materials,
A recording head characterized in that the recording electrode and the lead wire are connected by an elastic connector formed by arranging conductive strips on the surface of an elastic body.