JPS60118827A - Manufacture of dust proof plate of camera - Google Patents

Abstract

PURPOSE:To form a clear window part of a border line on a correct position even in case of a base material having a bent part by forming a dust proof plate of a finder, etc. of a camera, out of a transparent resin, coloring the circumferential edge of the transparent window part from the back of the plate by a hot stamping methode, etc., and painting the outside edge of the colored part with the same color. CONSTITUTION:In a dust proof plate material 1 having a transparent window part 2 and an opaque part 3 on the bent inside formed by a transparent resin, a colored part 5 is formed on the circumferential edge part of the window part 2 by a hot stamping method or a printing method. Subsequently, painting of the same color as the colored part 5 is executed to the outside edge of the colored part 5, and a dust proof plate for a finder of a camera and a photodetecting window part is manufactured. In this way, the dust proof plate which is light and low in its cost can be formed easily in a correct position with good linearity of a boundary between the window part 2 and the opaque part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a method of manufacturing a dustproof plate used for a finder portion of a camera, etc.

[Prior art]

The viewfinder and light receiving window installed at the top of the camera have
A dustproof plate is placed to cover it. Dust-proof plates used to be made of a metal plate with an opening and glass or transparent resin glued to the window, but recently there has been a demand for cameras to be lighter and lower in cost. Therefore, lightweight synthetic resins are increasingly being used instead of metal materials. Therefore, instead of using metal for the dustproof plate, a method is now used in which transparent resin is used as the material and the parts other than the windows where light cannot pass through are made opaque. There are hot stamping methods and printing methods.

Hot stamping is a method in which a polyester film coated with a pigment-type colorant or vapor-deposited foil is placed on the material to be transferred, and a metal letterpress engraved with the necessary letters, designs, etc. is heated and crimped. Then, it is a coloring processing method in which the necessary characters, Φ patterns, etc. are transferred onto the material. This method is characterized by the clear border between the opaque and transparent areas, and is often used for viewfinder windows, etc.There is a method of general painting on transparent resin, but It was difficult to make the border lines clear and without distortion using general paint, so it was not used for things like viewfinder windows.

When manufacturing a dustproof plate using a hot stamping method or a printing method on a transparent resin, hot stamping with a transparent window portion 2 and an opaque portion 3 on a flat transparent resin material 1 as shown in Fig. 1 is not possible. It can be done without any problem. However, as shown in FIG. 2, if the dustproof plate has a shape that has a bent portion on the side on which hot stamping is to be performed, hot stamping becomes very difficult. That is, when a heated relief plate is brought close to a bent portion, the transparent resin material 1 may be deformed. In particular, when the transparent window 2 is located near the bent part, it is difficult to hot stamp the blade in the correct position, and the position of the transparent window 2 varies, resulting in unstable quality. Because of this birch nature, the dustproof plates used in the past were limited to flat plates.

[Purpose of the invention]

The present invention is a dustproof plate with a folded part made of a transparent resin material as shown in Fig. 2, and has a transparent window part with a clear boundary line without distortion in the correct position. The purpose is to provide a manufacturing method.

[Structure of the Invention] The present invention aims to achieve the above-mentioned object.The present invention forms a dustproof plate having a transparent window portion using a transparent resin material, and extends from the back side to the periphery of the window portion. This is a method for producing a dustproof plate for a camera, in which the dustproof plate for a camera is colored by a hot stamping method or a printing method, and the outer edge of the colored part is painted in the same color.

〔Example〕

Examples of the present invention will be described.

FIG. 3 shows a front view of an embodiment of the dustproof plate manufactured according to the present invention, and FIG. 4 shows an enlarged sectional view of the side surface thereof.

When performing hot stamping with a transparent window part 2 and a hot stamp opaque part 5 on the inside of the folded transparent resin material 1, the size of the hot stamp letterpress should be adjusted to the folded part of the transparent resin material 1. Use a window frame-like item that is not large enough to cause damage. Next, as shown in painting part 4, apply the same color as the hot stamp to the transparent window part 2; ◇This painting process does not require precision, just fill in unnecessary areas. When viewed from the inside, the painted area is uneven, which is unsightly, but when it is actually attached to a camera, you will be viewing it through a transparent resin material, so there is no problem for the following reason.

In other words, since the hot stamped part and the painted part are in close contact with the glossy surface of the transparent resin material, both the hot stamped and painted surfaces have the same gloss, and with the addition of the surface reflection of the transparent resin material, they have the same gloss. When the hue of the stamp part and the hue of the painted part are made the same or similar, the boundary line between the hot stamp part and the painted part is erased, and the difference that the outer edge of the hot stamp is painted is ignored. Overall, the quality of the transparent window position is guaranteed since the hot-stamped letterpress can be held in the correct position.

The pigment color and paint color for hot stamping are often black due to light shielding, and the best finish is achieved, but other colors can be equally beautiful and the differences between the two can be admired if the colors are well matched. You can finish it so that it doesn't exist.

This manufacturing method is sufficiently effective when used as external parts of radios, televisions, audio equipment, automobiles, etc. other than cameras.

〔Effect of the invention〕

According to the present invention, a dustproof plate having a window near the folded part is colored only in the vicinity of the chamber by hot stamping or printing, and the outer edge of the plate is painted in the same color. Now, a method for manufacturing a dustproof plate for a camera has been provided, which has a window with an accurate chamber position and a clean edge line.

[Brief explanation of drawings]

1 and 2 show the shape of the dustproof plate. Fig. 3 shows a front view of a dustproof plate manufactured from the aAK of the present invention, and Fig. g4 shows an enlarged side view thereof. 1... Transparent resin material 2... Transparent window part 3... Opaque part 4... Painted part 5... Hot stamp unknown part Agent Yoshiyoshi Kuwahara

Claims (1)

[Claims] A dustproof plate having a transparent window portion is formed using a transparent resin material, and the periphery of the window portion is colored from the back side by a real stamp method or a printing method, and the outer edge of the colored portion is painted in the same color. How to make a camera dustproof plate.