JPH04351293A - Protective part of optical apparatus - Google Patents

Abstract

PURPOSE:To prevent the deposition of spatters and the generation of craters by setting the angle formed by the surface of a protective cover and the inner peripheral surface of the window of a holding plate at a dull angle or forming the surface of the protective cover flush with the surface of the holding plate. CONSTITUTION:The protective cover 1 is held by the holding plate 2 mounted on one surface of a body 3 and the window 20 to allow the peeping of the protective cover 1 is formed on the holding plate 2. The inner peripheral surface of the window 20 is so formed that the angle formed by this surface and the surface of the protective cover 1 is dull so that the spatters are prevented from colliding against the inner peripheral surface of the window 20 even if the spatters fly diagonally. There is, therefore, no deposition of the spatters. There is no deposition of the spatters and the generation of the craters in the protective cover 1 is obviated even in spite of the incoming of the spatters when the surface of the holding plate 2 and the surface of the protective cover 1 are formed flush with each other.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protector for optical equipment used in laser processing machines and welding equipment.

0002

2. Description of the Related Art When processing is performed using a laser processing machine or a welding device, there are some devices in which the processing position and the quality of the processing results can be detected using optical equipment. The optical equipment used at this time must be protected from spatter generated during processing, and for this purpose, as shown in FIGS. 8 and 9, a protective cover 1 made of a transparent material such as transparent plastic is conventionally attached. Things are being done. In the figure, reference numeral 2 denotes a holding plate that holds the periphery of the protective cover 1.

0003

[Problems to be Solved by the Invention] In the conventional holding plate 2, the inner circumferential surface of the window 20 through which the protective cover 1 can be seen is formed so as to be perpendicular to the surface. , as shown in Figure 10(a),
Spatter 8 may accumulate and adhere to the inner peripheral surface of the window 20,
A crater 19 would be formed on the protective cover 1.

[0004] The present invention has been devised in view of these points, and its object is to provide a protective portion for optical equipment that is free from sputter deposition and craters.

[0005]

[Means for Solving the Problems] The present invention provides a protection unit comprising a protection cover for the purpose of spatter protection and a holding plate for attaching the protection cover to the container body, which is provided with a window through which the protection cover can be seen. It is characterized in that the angle between the surface of the protective cover and the inner peripheral surface of the window of the holding plate is an obtuse angle, or the surface of the protective cover and the surface of the holding plate are flush with each other.

According to the present invention, since there is no part where spatter can accumulate, craters will not be formed on the protective cover.

[0007]

[Embodiment] The present invention will be described in detail below based on the illustrated embodiment. In FIGS. 1 and 2, a plurality of protective covers 1 made of a transparent material such as plastic or glass are disposed on one surface of the container body 3. These protective covers 1 are held by a holding plate 2 attached to one side of the container body 3. A window 20 through which the protective cover 1 can be seen is formed in the holding plate 2, and the inner circumferential surface of this window 20 is formed so as to form an obtuse angle with the surface of the protective cover 1. ing. In this case, even if spatter flies from an angle, the sputter will not hit the inner circumferential surface of the window 20, and therefore no spatter will be deposited.

In the case shown in FIGS. 3 and 4, holding plates 2 are integrally formed on both sides of the container body 3, so that a protective cover 1 that covers all sides of the container body 3 can be attached in a sliding manner. However, in this case as well, the angles formed between the facing surfaces of the holding plates 2 on both sides and the surface of the protective cover 1 are made obtuse angles, so that the same effect as in the previous embodiment can be obtained.

Other embodiments are shown in FIGS. 5 to 7. Here, as the protective cover 1, the thickness of the peripheral edge pressed by the retaining plate 2 is thinner than that of the central part, and the retaining plate 2 is
The center portion of the protective cover 1 fits into the window 20 of the protective cover 1, so that the surface of the retaining plate 2 and the surface of the protective cover 1 are flush with each other. In this embodiment as well, even if spatter flies, there is no place where spatter will accumulate, and not only spatter will not accumulate, but no craters will be formed on the protective cover 1.

0010

As described above, in the present invention, the angle between the surface of the protective cover and the inner circumferential surface of the window of the holding plate is made obtuse, or the surface of the protective cover and the surface of the holding plate are made flush with each other. Therefore, even if spatter hits the protective cover from an angle, the spatter will simply bounce off the protective cover, and there is no place for spatter to accumulate, so there will be no accumulation of spatter, and the protective cover will There are no craters.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of one embodiment.

FIG. 2 is a perspective view.

FIG. 3 is a perspective view of another example.

FIG. 4 is a cross-sectional view.

FIG. 5 is a perspective view of another embodiment.

FIG. 6 is a cutaway side view.

FIG. 7 is a cross-sectional view.

FIG. 8 is a perspective view of a conventional example.

FIG. 9 is a cross-sectional view.

FIG. 10(a) is a cross-sectional view showing sputter deposition, and FIG. 10(b) is a cross-sectional view showing a place where a crater is formed.

[Explanation of symbols]

1 Protective cover 2 Holding plate 3. Vessel 20 Window

Claims (2)

[Claims] Claim 1: In a protective part consisting of a protective cover for the purpose of spatter protection and a retaining plate that attaches the protective cover to the vessel and has a window through which the protective cover can be seen, the surface of the protective cover and the window of the retaining plate are A protective part for an optical device, characterized in that the angle formed between the protective part and the inner circumferential surface is an obtuse angle. Claim 2: In a protective part consisting of a protective cover for the purpose of spatter protection and a retaining plate that attaches the protective cover to the vessel and has a window through which the protective cover can be seen, the surface of the protective cover and the surface of the retaining plate are A protective part for an optical device, characterized in that the parts are flush with each other.