JPS5832327B2 - Manufacturing method of scale plate for indicating instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a scale plate for an indicating instrument capable of displaying light.

Conventionally, the scale plate for indicating instruments has generally been an aluminum plate with scales, indicators, etc. printed on it, making it a relatively expensive component. If reading is to be possible, a scale plate made of an aluminum plate cannot be internally illuminated, so the light source must be placed on the front side of the scale plate, and the light source should not come into direct contact with the eyes. There were various inconveniences, such as the need to cover the appearance.

Furthermore, in cases where there are positive and negative levels on the scale and indicators of the scale plate, it is necessary to display colors according to these levels to facilitate reading.

In such cases, the conventional method of printing scales and indicators in multiple colors has been adopted, but this poses a problem of printing defects.

The present invention was made to solve these problems, and its purpose is to provide a visually expensive feeling similar to the conventional metal scale plate, and to place the light source on the back side of the scale plate. It is an object of the present invention to provide a method for manufacturing a scale plate for an indicating instrument, which enables the scale and index to be displayed optically, and also allows the color separation to be easily displayed.

Hereinafter, a detailed description will be given with reference to embodiments shown in the drawings.

FIG. 1 is a front view of an indicating instrument using a scale plate according to the present invention with the cover removed, and FIG. 2 is a rear view of the scale plate 20 seen from the back side. In these figures, reference numeral 10 12 is a case of the instrument, 12 is a cylindrical yoke, 13 is a magnetic steel core supported at the center of this yoke 12, 14 is a movable wire ring fitted with this magnetic steel core, and 15 is integrated with this movable wire ring 14. 16 indicates one bearing member, 17
indicates a light source arranged on the back side of the scale plate 20, that is, inside the case.

On the scale plate 20, a scale 21 and an index 22 ranging from a negative level to a positive level are formed over a range of 150 rotations of the pointer.

Next, the third method for manufacturing the scale plate 20 according to the present invention will be described.
This will be explained with reference to FIGS. 6 through 6.

The scale plate 20 is based on a substrate 23 made of transparent or semi-transparent synthetic resin such as acrylic resin or polycarbonate.

First, from the back side of such a substrate 23, for example, red ink is printed or applied on the area 24 including the positive level scale 21a and the index 22a, and also on the area 24 including the negative level scale 21b and the index 22b. By printing or applying blue ink to the layers 25, color-coded transparent ink layers 24a and 25b are formed, respectively.

This state is shown in FIG. In this embodiment, the back surface on which the scale 21e indicating the zero level and the index 22c are present is left as is.

That is, no ink layer is formed on the back surface of this portion.

Next, as shown in FIG. 4, a scale 2 is placed on the surface of the substrate 230.
An ink layer 27 is formed by applying appropriate ink of the same color to the entire surface where 1 and the index 22 are left, that is, the background part, by screen printing.

Thereafter, a sheet 29 provided with aluminum foil 28 deposited in advance is hot-stamped onto the surface of the ink layer 27 formed with the scale 21 and indicators 22 remaining.

This state is shown in FIG.

Due to this thermal compression, the aluminum foil 28 adheres to the ink layer 27, which has a relatively strong adhesive force, but it is difficult to adhere to the substrate A of the scale 21 and index 22 where no ink layer exists. When the sheet 29 is peeled off as shown in , the parts of the aluminum foil 28 corresponding to the scales 21 and indicators 22 are peeled off while remaining attached to the sheet 29, and all other parts remain adhered to the ink layer 27. .

If a light source 17 such as a neon lamp is placed and irradiated on the back side of the scale plate 20 manufactured in this way, an aluminum foil 28 will be formed on the front surface.
The portion where the aluminum foil 28 is attached is shielded from light, and the light from the light source 17 is transmitted through the portion where the aluminum foil 28 is not attached, that is, the scale 21 and the index 22.

As a result, the transmitted light from the scale and the index becomes colored light of each color of the ink layers 24 and 25 printed on the back surface, and is optically displayed.

That is, the positive level scale 21a and the indicator 22a
is displayed with red light, while the negative level scale 21b and indicator 22b are displayed with blue light.

Further, it goes without saying that the zero level scale 21c and the index 22c are not colored at all, and the light from the light source 170 tones is displayed as is.

Although aluminum foil was used as the material for forming the uppermost layer in the above embodiment, the present invention is not limited thereto, and other metal foils such as gold foil may be used.

As explained above, according to the method of the present invention, a scale plate can be obtained which can be applied to an internally illuminated indicator that has a metallic background color on the surface, is translucent, and has colored scales and indicators. It will be done.

Furthermore, the scales and indicators are easy to manufacture because they can be accurately formed by a very simple process of hot-stamping a sheet with metal foil and peeling it off.

[Brief explanation of drawings]

Fig. 1 is a front view showing an example of an indicating instrument using a scale plate according to the present invention, Fig. 2 is a rear view of this scale plate, and Fig. 3 is a rear view of this scale plate.
6 to 6 are cross-sectional views for explaining the manufacturing process of the scale plate according to the present invention. 20... Scale plate, 21... Scale, 22... Index,
23...Substrate, 24, 25-...Region, 24a, 2
5b, 27... Ink layer, 28... Aluminum foil, 29
...Sheet.

Claims (1)

[Claims] 1. A colored ink layer having translucency is formed on the back surface of a substrate made of a transparent or semi-transparent synthetic resin that includes the scales or indicators, and a colored ink layer having translucency is formed on the surface of the substrate. An ink layer is formed leaving an index, and then a sheet having a metal foil is bonded by thermocompression on this ink layer,
A method for producing a scale plate for an indicating instrument, characterized in that the sheet is then peeled off to adhere the metal foil onto the substrate.