JPS58211299A - Coding apparatus and manufacture thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coding device used in a rotary sweetener, etc., and a method for manufacturing the same, and its purpose is to form a pattern consisting of conductive parts and non-conductive parts on the inner surface of a circular part. By doing so, it is possible to improve the reliability of the rotary switch and to make it smaller.

Conventionally, as shown in Fig. 1, a rotary switcher encoding device first uses a smooth disc-shaped metal plate (6).
On top, a resist (insulating paint) is applied in a desired pattern using a silk screen method to form a non-conductive area (8), or a photoresist (photosensitive insulating paint) is applied and a desired pattern is formed using a photosensitive printing method. Non-conductive part (8) in the pattern of
form. After that, the exposed metal plate (6) is plated with nickel, copper, gold, etc. to form a conductive part (7), or a conductive paint is applied by a silk screen method to form a conductive part (force). Next, on the conductive part (7),
It is formed by adhering the resin substrate (9) and finally removing the metal plate (6). The slider (10) slides on the non-conductive part (8) and the conductive part (7) of the encoding device formed in this way, and reads the code.

However, in the conventional plate-shaped coding device, the pattern width of the inner side (center part of the plate) needs to be narrower than the pattern on the vertical side, and the conductive part (7) and the non-conductive part (8 ) when trying to make the pattern finer,
It is difficult to make the pattern accuracy on the inside comparable to the pattern accuracy on the top side.

The present invention has been made in view of the above points, and eliminates the above-mentioned drawbacks by forming a round pattern of conductive parts and non-conductive parts on the inner surface of a cylinder.

The method of manufacturing the encoding device of the present invention will be explained below with reference to FIGS. 2 to 6. First, FIGS. As shown in Figure J-3, a resist (
After drying and fixing, a desired pattern of non-conductive portions (2) for growing green onions (3) is formed by sandblasting or photosensitive printing.

Next, as shown in No. 4m, a conductive chamber material is applied to the surface of the metal tube (11) exposed from the non-conductive part (2) and the tube (3) by a silk screen method, or the conductive chamber material is sprayed from a nozzle. The conductive portion (4) 2 is formed by spraying or plating with nickel, silver, or gold.

Next, as shown in Fig. 5, the vertical side of the 14 electric part (4) is coated with resin or adhesive, and on top of that is an insulating layer (5) made of a resin film with excellent acid resistance. Co-adhesion-5-ru.

Next, by etching the inner cylindrical metal tube (1), a coding device as shown in FIG. 6 is obtained.

Furthermore, a detailed description of one embodiment of the present invention will be given below.

First, a cylindrical metal tube (11 is a brass tube with a thickness of 0.1 mm) is coated with a commercially available photoresist mainly composed of polyimide, such as a product name Photoneese (manufactured by Toshihide Co., Ltd.) is applied to a thickness of 5 pm.Then, by photosensitive printing, a resist is left in the portions to be made non-conductive portions (2), and unnecessary portions of the resist are removed.

Next, the resist is removed, and a conductive material (7 Fubon Ink) is coated on the 1 part with a thickness of about 10 μm using a silk screen method, and is dried and fixed to form a conductive part (4).

Next, a commercially available tape-like adhesive (manufactured by Teraoka Seisakusho ■) impregnated with epoxy resin is wrapped around a polyester non-woven fabric, heated and fixed to form an insulating layer (5). After dissolving and removing the brass tube with an etching solution consisting of the following, washing with water, and drying, the L1 finish is applied to form a coding device in which a conductive part (4) and a non-conductive part (2) are formed in the same cylindrical shape.

As described above, since the present invention has conductive parts 4 in a desired pattern on the inner surface of a cylinder, unlike the conventional flat plate-shaped coding device, conductive parts and non-conductive parts are provided on the inner surface of the cylinder. There is no need to make the inner pattern width narrower than the 2-tat side in the pattern on the side, and as a result, the pattern can be made finer, which has the remarkable effect of improving the reliability and downsizing of the device itself. .

[Brief explanation of the drawing]

The first step (S1) relates to a conventional encoding device, as shown in FIG.
1 is a cross-sectional view during the manufacturing process, FIG. ! Figure (b) A
-A sectional view, each part (bl is the perspective view. (1) Metal tube (2) Non-conductive part (4)
Conductive part (5) Insulating layer 8 8 Kuuko Kunika Yabu Procedural Amendr November 19, 1980 To the Commissioner of the Japan Patent Office 1, Indication of Case Patent Application No. 1983-96379 2, Invention Title Coding Device and its Manufacturing method 3, relationship with the case of the person making the amendment Appearance person 〒145 Telephone Tokyo (7'26) + 2
11 (Representative) (1) In the second line from the bottom of the first page of the specification, the words "Aru." are amended to "Ni Aru." (2) Correct "Each part (blJ, F, R, tr, each figure (b)" on page 5, page 16F'r of specification 1f).

Claims (2)

[Claims] (1) A coding device characterized in that a desired pattern of conductive parts and non-conductive parts is formed on the inner surface of the circumference. (2) Form a non-conductive part in a desired pattern on the vertical side of the metal tube, form a conductive part on the non-conductive area and the exposed vertical side of the metal tube, and form an insulating layer on the vertical side of the conductive part. and then removing the metal tube by etching.