JPH01166600A - Method of printing electromagnetic shield panel for lighting equipment - Google Patents

Abstract

PURPOSE:To make it possible to print with few screens, by using a first screen having a wide pattern at one side and a plurality of narrow patterns in a direction crossing it and a second screen having a wide pattern. CONSTITUTION:A screen 8A having a wide pattern 9A and a plurality of narrow patterns 10A extending in a direction crossing it is prepared. In addition, a screen 8B having a wide pattern 9B and a plurality of narrow patterns 10B extending in a direction crossing it is prepared. Also, a screen 8C having a wide pattern 9C is prepared. At the time of printing on a panel 6, adjacent wide grid parts 11 on two sides and narrow grid parts 12 extending in a direction crossing them are printed by using the screens 8A and 8B. Then, a part in which a wide grid does not exist is printed by using the screen 8C. As described above, the part 12 is printed. As a result, it is possible to print a grid with few screens without damaging a shield effect.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a method of printing electromagnetic shield panels for lighting equipment.

(Prior Art) Lighting equipment used in examination rooms, examination rooms, etc. is required to prevent future electromagnetic noise. Therefore, a conductive grid is printed directly on a translucent panel that covers the opening of the device body, thereby preventing noise.

To explain this in detail, in Fig. 9, 1 is a box-shaped device body, 2 is a side wall thereof, and 3 is a rectangular frame provided at the opening edge of the device body 1, which is attached to the side wall 2. It is supported by a kick spring 5 in a figure 7 shape to be able to move up and down with respect to the supporting metal fitting 4 that is attached thereto.

Reference numeral 6 denotes a panel that covers the opening surface of the instrument main body 1, and is installed by being placed on the upper surface of the frame 3.

In order to prevent electromagnetic noise, a lattice-like grid 7 is directly printed on the surface of the panel 6.

The grid 7 is suitably electrically connected to the instrument body 1.

Conventionally, a screen 8 having a pattern as shown in FIG. 6 has been used for this printing. That is, this pattern is made up of a peripheral wide pattern 9 and a lattice-like pattern 10 that is connected to this pattern 9 at both ends.

Note that the printed grid is required to have a wide perimeter, and if this is not the case.

It is well known that the electromagnetic shielding effect is reduced. For this purpose, a screen 8 with a pattern 9 is required.

Although it is possible to print a predetermined pattern of grids 7 using such a screen 8, it is not possible to use the same screen for panels for different lighting fixtures with different numbers of lights. Undesirable.

For example, when printing on a panel of a fixture with a small number of lights, a grid 7 with one side edge missing as shown in FIG. Even if printing can be done by shifting the screen 8.

As shown in FIG. 8, a wide grid 7 appears in the center, which spoils the appearance.

In either case, the grid 7 has no wide part around one periphery, so the shielding effect is halved.

To avoid these problems, screens may be provided for each panel of fixtures with different numbers of lights, but this type of screen is extremely expensive and therefore not economical.

(Problem to be Solved by the Invention) This invention makes it possible to print grids on panels of various types of fixtures with different numbers of lights by simply preparing a small number of screens. purpose.

(Means for Solving the Problems) The present invention provides one or two types of first screens having a wide pattern on one side and a plurality of narrow patterns extending in a direction crossing the pattern. , a second screen having a wide pattern, first a grid of lattice-like patterns is printed by the first screen, and then the remaining periphery of the pattern is printed by the second screen. It is characterized by printing a wide grid.

(Example) An example of the present invention will be described with reference to FIGS. 1 to 5. In addition, parts with the same reference numerals as in each figure after Fig. 6 indicate the same or corresponding parts.
As shown in the figure, a first screen 8A is prepared which has one wide pattern 9A on one side and a plurality of narrow patterns IOA extending perpendicularly to the pattern 9A.

Further, as shown in FIG. 2, a screen 8B is prepared which has a wide pattern 9B on one side and a plurality of narrow patterns IOB extending perpendicularly to the pattern 9B. Furthermore, as shown in Fig. 3, a wide pattern 9C is formed.
A second screen 8C is prepared.

When printing on the panel 6, first the first screen 8A
, 8B to print conductive ink on the panel 6. To be specific.

One screen is used to print first, then the other screen is placed so that each pattern intersects the first printed area, and the ink is printed in the same way.

Through the above printing process, as shown in FIG. 4, wide grid portions 11 on two sides adjacent to each other and narrow grid portions 12 extending crosswise from each grid portion 11 have been printed. Become. At this time, there are no wide grid portions on the other two adjacent sides.

This missing portion is printed using the third screen 8c. This printing is performed by printing 0 or more on each side, and as shown in FIG. This means that a pattern with a width grid has been printed. After printing, the ink is allowed to solidify before completion.

In the above explanation, two types of first screens 8A, 8
B is prepared, but this may be one type. In this case, after printing for the first time, the screen or panel 6 may be rotated 90 degrees, and then printing may be performed again using the same screen.

(Effects of the Invention) As detailed above, according to the present invention, grids can be printed on panels of lighting fixtures with different numbers of lights using a small number of screens in an attractive manner and without impairing the shielding effect. It has the effect of being able to

[Brief explanation of the drawing]

1 to 3 are perspective views of each screen used in an embodiment of the method of this invention, FIGS. 4 and 5 are perspective views showing the printing process according to an embodiment of this invention, and FIG. 6 is a conventional example. 7 and 8 are perspective views of panels printed using the screen of FIG. 6, and FIG. 9 is a partial cross-sectional view of a lighting fixture. 6...Panel, 7...Grid, 8A-8C...
Screen, 9A to 9C... wide pattern, IOA
~10B...Narrow pattern, 11.12...Grid part.

Claims (1)

[Claims] One or two types of first screens each having a wide pattern on one side and a plurality of narrow patterns extending in a direction crossing the pattern, and a second screen having a wide pattern. A conductive grid consisting of a lattice-like pattern is first printed on the panel by a first screen so that wide grid areas are formed on two adjacent sides, and then, among the grids, A wide conductive grid portion is printed on the peripheral edge where the wide grid portion is not printed by the second screen, thereby forming a grid in a lattice-like pattern in which the entire periphery is a wide grid portion. A method for printing electromagnetic shield panels for lighting equipment, characterized by: