JP3153976B2 - Adjustment screw structure for preventing electromagnetic leakage from waveguide - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adjusting screw structure for preventing electromagnetic leakage of a waveguide, and more particularly, to an adjusting screw structure of a waveguide that requires prevention of electromagnetic wave leakage.

[0002]

2. Description of the Related Art Conventionally, this kind of adjusting screw for preventing electromagnetic leakage of a waveguide has been left bare.

FIG. 3 is a diagram showing one row of a conventional waveguide. After adjusting the filter and the like, the adjusting screw 1 is fixed to the waveguide 10 by the nut 2.

[0004] In recent years, the electromagnetic environment has been severely restricted, and electromagnetic compatibility must be observed. In the waveguide, radiation interference noise and radiation interference sensitivity are particularly problematic, and a conductive paint is applied to the joint and the adjustment screw as a measure for preventing leakage of electromagnetic waves.

FIG. 4 is a cross-sectional view when a conductive paint is applied to an adjusting screw portion of a conventional waveguide. After the adjustment of the filter and the like, the conductive paint 8 is directly applied around the adjustment screw 1 and the nut 2.

[0006] An insulating cover for electrically insulating and protecting the exposed portion of the screw, and a mounting ring fitted to the screw, for insulating and protecting the external part of the electronic device in which the insulating cover and the mounting ring are screwed. The cover is a real open flat 1-131.
No. 012.

[0007]

In the conventional waveguide, since the conductive paint is directly applied to the adjusting screw portion, there is a problem that the conductive paint enters the groove of the screw and changes the characteristics of the filter and the like. .

Accordingly, the present invention prevents a change in the characteristics of a filter or the like by preventing the conductive screw from being applied to the adjusting screw portion of the waveguide, and improves the performance such as radiation interference noise and radiation interference sensitivity. What you want to do.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an adjusting screw portion structure for preventing electromagnetic leakage of a waveguide according to the present invention has a cover on an adjusting screw and a nut for fixing the adjusting screw and a nut. Is provided with a protruding portion, and a screw is cut. A female screw is cut in the cover, and a female screw of the cover is engaged with a male screw of the waveguide to fix the cover to the waveguide. Further, a conductive paint is applied around the cover fixed to the waveguide.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention, in which a cover 3 is put on an adjusting screw 1 and a nut 2. The waveguide 4 is provided with a projection 5 larger than the diameter of the nut 2 and cut off a screw 6, and an internal screw 7 is cut inside the cover 3 so that the cover 3 is provided with a projection. It can be fixed to. After adjusting the filter and the like, the adjustment screw 1 is fixed with the nut 2. The cover 3 is put on the cover 3, and the female screw 7 of the cover 3 is engaged with the male screw 6 of the waveguide 4.
Is fixed to the waveguide 4. The cover 3 is desirably provided with a groove 9 so that the cover 3 can be turned using a tool.

FIG. 2 shows an adjusting screw 1 and a nut 2 with a cover 3.
FIG. 4 is a cross-sectional view when a conductive paint 8 is applied around a cover 3.

[0013]

As described above, the adjusting screw structure for preventing electromagnetic leakage of the waveguide according to the present invention has a cover over the adjusting screw and the nut, so that it is not necessary to apply a conductive paint, and the manufacturing time is reduced. Be shortened. In addition, since the conductive paint does not enter the groove of the adjusting screw, the characteristics of the filter and the like do not change. In addition, if a light material is used for the cover, the increase in the overall weight will not be much hindered.If the standard is strict, apply a conductive paint around the attached cover and use a filter, etc. Performance such as radiation interference noise and radiation interference sensitivity can be improved without deteriorating characteristics.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of an adjustment screw portion structure for preventing electromagnetic leakage of a waveguide according to the present invention with a cover removed.

FIG. 2 is a cross-sectional view when a cover is attached and a conductive paint is applied in FIG.

FIG. 3 is a perspective view showing an example of a conventional waveguide.

FIG. 4 is a cross-sectional view when a conductive paint is applied in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adjusting screw 2 Nut 3 Cover 4 Waveguide provided with convex part 5 Convex part 6 Male screw 7 Female thread 8 Conductive paint 9 Groove 10 Conventional waveguide

Claims (2)

(57) [Claims] 1. An adjusting screw is fixed to a waveguide with a nut, a male screw is cut into the waveguide, a female screw is cut into a cover covering the adjusting screw and the nut, and a female screw of the cover is used as a male screw of the waveguide. An adjusting screw part structure for preventing electromagnetic leakage of the waveguide, wherein the cover is fixed to the waveguide in accordance with the above. 2. The structure of claim 1, wherein a conductive paint is applied around the cover fixed to the waveguide.