JPS58107377A - Multi-needle electrode head - Google Patents

Abstract

PURPOSE:To obtain a multi-needle electrode head useful for facsimile and capable of easily preventing the disconnection of the needle wires of a main electrode by covering the boundary part to be led to the resin-buried parts of needle wires arranged in large numbers in parallel to form an elastic main electrode by coating with a silicone material. CONSTITUTION:A main electrode 2 is formed by arranging large numbers of needle wires in one or plural rows, and plural auxiliary electrodes 3 facing each other are provided on both sides of the main electrode 2. Then, both the electrodes 2 and 3 are buried in a resin. The resin-buried part corresponds to a head body 4, and the electrode faces 2a and 3a of the main electrode 2 and the auxiliary electrodes 3 appear on the front 4a of the head body 4. Also, the lead part 3b of the auxiliary electrode 3 and the projection 2b of the main electrode 2 are provided on the back 4b of the head body 4. Then, a silicone 5 is coated on the boundary part 2d to be led to the partial resin-buried part 2c of the projection 2a of the main electrode 2 to obtain an objective multi-needle electrode head 1.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention is used in electrostatic recording facsimiles, etc., and has a main electrode consisting of a large number of needle wires.
IC@C, more specifically, C, relates to a multi-needle electrode head that prevents breakage of the needle wire of the main electrode.

Conventionally, the main electrode used in a multi-needle electrode head consists of a large number of parallel needle wires, a portion of which is embedded in resin and the remaining portion protrudes from the resin.

The part of this needle line that immediately protrudes from the resin (boundary part)
Because the cross-sectional change was sudden (11 square meters), stress concentration was likely to occur, and wire breakage was therefore likely to occur. For this reason, tape was pasted across the boundary site and the tree jlK to prevent m-tangles.

However, although it worked well at first to attach the tape, I! It peeled off from the needle line due to changes over time or the effects of heat, etc., and could not perform its function of preventing #&I. It was. Pasting the tape is work Fi, multi #!
It was a 1m example because the itv needle lines had to be aligned and pasted.

This invention was made by focusing on such conventional problems, and the boundary region t-, which is connected to the resin-embedded region of the needle wire,
The purpose of this invention is to solve the above problems by providing a multi-needle electrode head tube that is coated with silicone so as to have elasticity.

Hereinafter, a practical example of the present invention will be explained based on the drawings.

First, the configuration will be explained. Multi-needle electrode head LTL! .

6 main electrodes 2Fi with main electrode 2 and auxiliary electrode 3
Formed by a large number of needle lines arranged in one or multiple rows,
A plurality of auxiliary electrodes 3 are provided on both sides of the main electrode 20 in correspondence with each other, and both electrodes 2 and 3 are embedded in resin. The part embedded with this resin is the head part 4, and the front surface of the head part 4 is bounded by the main electrode 2 and the auxiliary electrode 3, ie, electrodes 2a and 3m, respectively. Also, head s4
The lead portion 3b of the auxiliary electrode 3 and the protruding portion of the main electrode 2 protrude from the back 1ffi4b.

This protruding portion 2b is attached to a lead portion abF on a printed board (not shown).
i Harness KjI not shown! can be attached. and.

Part of the protrusion sb of the main electrode 2, the resin-embedded portion 26
The silicone 5 is unavoidably applied by a brush or the like to the boundary region 211 that is connected to the . This silicone 5 is naturally attached to the back side 4b of the head W&4, and its nature is wet.
It has excellent heat resistance, elasticity, chemical resistance, etc., and does not change over time.

Next, the effect will be explained. When attaching the multi-needle electrode head 1 to a case KkliL (not shown), touch the protruding part 2bKIK of the main electrode 2, or touch the protruding part 2bKIK of the main electrode 2 when the multi-needle electrode head 1 is activated. When a force is applied to the surface, this force is absorbed by the elastic silicone 5 of the boundary area.

Needle # does not make sharp bends and is almost never broken.

Furthermore, the silicone 5 has heat resistance and chemical resistance, and does not change over time, so it does not change depending on the R conditions and always remembers the needle line next to the boundary site.

In addition, to cover the needle wire with silicone 5.

Head portion 4t - When performing cast molding with resin, silicone 5 may be applied to the mold and needle wires may be arranged in parallel to cover the silicone 5.

As explained above, according to the present invention.

Since we provided a multi-needle electrode head coated with silicone to give the boundary area of the main electrode 1 elasticity, there was no need to break the needle wire!
I can be prevented, and the work of applying silicone t-m cloth is easier than the work of pasting conventional tape.

[Brief explanation of the drawing]

The figure is a perspective view showing a part of a multi-needle electrode head according to an embodiment of the present invention. l...Multi-needle electrode head, 2..., main pole. 2C...Resin embedded site, 2i...Boundary site. 5. Shaft silicone.

Claims (1)

[Claims] A multi-needle electrode head characterized in that a boundary portion of a large number of parallel needle wires forming the main electrode is coated with silicone to provide elasticity and connects to the resin-embedded portion;