KR101871684B1 - Waveguide for EMP shielded - Google Patents

Abstract

The present invention relates to a waveguide for shielding an electromagnetic wave, and more particularly, to a waveguide for shielding an electromagnetic wave, comprising: a tube having an outer periphery formed with a thread and having inner diameters different from each other; A pair of nuts assembled to the outer periphery of the waveguide; A core having an outer periphery formed of an inclined surface corresponding to an inner diameter of the waveguide, a plurality of guide grooves formed in an outer periphery thereof in the longitudinal direction, and a screw groove formed in a side surface of the small diameter; A washer in which a plurality of recesses are formed radially; And a tightening screw that is assembled to the threaded groove of the core; And it has a simple structure and provides an excellent effect of space utilization.

Description

Waveguide for EMP shielded "

The present invention relates to a waveguide for shielding an electromagnetic wave, and more particularly, to a waveguide for shielding an electromagnetic wave, and more particularly to a waveguide for shielding an electromagnetic wave, To an electromagnetic wave shielding waveguide which is capable of effectively shielding electromagnetic waves from electromagnetic wave or electromagnetic pulse (EMP) from a device or from the outside, thereby effectively protecting internal electronic equipment from EMF.

It is a well-known fact that modern society uses various electronic and communication products, and most of the work is also processed by computer. In addition, the state administration, the military, and the financial sector are using various kinds of electronic equipment, communication equipment, and electronic financial system for business efficiency.

However, such electronic equipments, communication equipments, and electronic financial systems are known to be very susceptible to electromagnetic pulses or electromagnetic pulses commonly referred to as EMP (Electromagnetic Pulse), causing malfunction or severely damaged in severe cases have.

These empies are also generated naturally by lightning, or even when explosives of nuclear bombs or electronic bombs are used. In the case of electronic and telecommunication devices that function as important work, they are actively seeking means to protect them from unexpected external emf Is emerging as an urgent task.

Emmy-emitting weapons generate powerful electromagnetic pulses in the event of an explosion, damaging or destroying basic and critical national, defense, and industrial facilities such as electrical and electronic equipment, communications networks, computer networks, military operations control systems and financial systems, Paralysis can lead to disasters like catastrophe, or it can paralyze national functions and industrial functions.

Accordingly, in recent years, a variety of measures have been researched and developed to protect the main electronic and communication facilities of the country as well as companies from the EMC attacks that may occur in case of emergency.

Especially, all communication and electronic equipments installed in various shielding structures as well as shielding rooms such as protection facilities and electromagnetic wave laboratories must be completely protected from external emissive. In such a shielding room or various kinds of shielding structures, A waveguide for the optical fiber cable is installed so as to block the wired line such as the optical cable that is led into the inside and the other electromagnetic wave that can flow from the outside.

Such a waveguide is used as a connection path of a communication line such as an optical cable, inside and outside of a shielded room or a structure while shielding electromagnetic waves, and is generally made in a ratio of a certain length or more with respect to a diameter.

A core is provided inside the waveguide so as to minimize the inflow space of the electromagnetic wave by filling the hollow of the waveguide. A plurality of guide grooves are formed in the longitudinal direction as a passage through which the optical cable passes.

However, in the conventional waveguide, there is a problem that it is difficult to completely block the electromagnetic wave due to the gap formed between the inner diameter and the core.

For example, Korean Patent No. 10-1486783 (Patent Document 1) discloses a waveguide having an inner circumferential surface inclined in the axial direction and an outer circumferential surface of the core member inclined to correspond to the inner circumferential surface of the waveguide, The core member and the waveguide are brought into close contact with each other so that the electromagnetic wave of high frequency is completely blocked when the waveguide is inserted into the waveguide.

Therefore, according to Patent Document 1, it is possible to more reliably cut off the electromagnetic wave due to the firm contact between the inner surface of the waveguide and the core member.

However, in Patent Document 1, a rib is formed to limit the entry of the core member into the inner periphery of the waveguide, and the rib is tightened by screwing the cap member and the waveguide on the outer side so that the core member is brought into close contact with the inner peripheral edge of the waveguide In this case, four problems are pointed out.

In other words, one of the reasons is that coupling of the waveguide and the core member is unreasonable. If the core member is not precise, the entrance of the core member is restricted by the rib before the inner circumferential surface of the waveguide and the outer circumferential surface of the core member are in close contact with each other, Therefore, it is necessary to use a core member having a sufficient size in order to prevent it from being adhered to the inner circumferential surface of the waveguide. As a result, the rib can be fixed in a state of being separated from the front end of the waveguide, A protruding portion is formed, which results in inadequate space utilization.

Secondly, it is unreasonable that space utilization due to the cap member itself along with the protruding portion of the unnecessary core member as described above is caused by the protruding portion of the protruding portion having a larger diameter than that of the waveguide due to the structural characteristic of tightening the core member by the cap member from the outside It occupies space.

This is in addition to the above-described first problem, which requires an additional protruded space for operating the cap member from the outside, and thus presents an unreasonable condition for combination with other components due to an unfavorable appearance and an inefficient configuration of the space.

Third, the coupling groove of the patent document 1 through which the optical cable or the like passes may be formed on the inner circumferential surface of the waveguide without being formed on the outer circumferential surface of the core member if necessary. However, It is difficult to apply the configuration because the coupling groove is blocked by the member. Consequently, the configuration of Patent Document 1 is limited in compatibility.

Fourthly, when manufacturing a waveguide tube, when machining a threaded portion of the outer periphery, generally, a portion of the tube is fixed to the chuck by being affixed to the chuck. In this case, deformation may occur in the threaded portion, It is impossible to catch it.

In order to solve this problem, a part of the thread is processed as a fixed part in the process of machining a part of the thread in the outer circumferential surface of one side. In the waveguide as in the present invention, such space can not be utilized and the thread is partially deformed. There is a problem that the reliability of the product is deteriorated.

1. Korean Patent No. 10-1486783

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems as described above, and it is an object of the present invention to provide a waveguide for shielding EMI, which has a simpler structure and is excellent in space utilization and compatibility.

It is another object of the present invention to provide a waveguide structure which can be used as a means for engaging a machine when fabricating a waveguide by using a fixing nut integrally formed with a waveguide at one end of an outer circumferential surface of the waveguide, Waveguide.

In order to achieve the above-mentioned object, the present invention provides a hollow waveguide in which a screw is formed on the outer periphery, an inner diameter of both sides is different from each other, and a plurality of guide grooves are formed in the longitudinal direction on the inner periphery, ; A pair of nuts assembled to the outer periphery of the waveguide; A core having an outer periphery formed of an inclined surface corresponding to an inner diameter of the waveguide and a screw groove formed on a side of a small diameter; A washer in which a plurality of recesses are formed radially; And a tightening screw that is assembled to the threaded groove of the core; And the like.

Therefore, by tightening the tightening screw on the opposite side of the core that has entered the waveguide, it is possible to induce a firmer close contact, and a space for external operation is not needed, and the space can be utilized effectively.

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According to the waveguide for shielding the present invention, the inner diameter of the waveguide and the outer diameter of the core are inclined so as to be in close contact with each other, and the core is tightly tightened to the inner diameter of the waveguide with a tightening screw, It provides the effect of increasing the usability of the space by eliminating the need for a nut.

According to the present invention, it is possible to form a guide groove through which a cable can pass not only on the outer circumference of the core but also on the inner circumference of the wave guide, thereby providing a waveguide for shielding EMI.

The present invention provides a fixing nut integrally formed with the waveguide at one end of the outer circumferential surface of the waveguide, thereby providing a means for using the waveguide as a means for holding the waveguide while making it possible to use the waveguide as a more rigid fixing means.

1 is a perspective view showing an embodiment of the present invention.
2 is an exploded perspective view of the present invention.
3 is an assembled cross-sectional view of the Fig. 1 above.
4 is a cross-sectional view of a waveguide according to the present invention.
Figure 5 is a perspective view of another embodiment of the present invention.
FIG. 6 is an exploded perspective view of FIG. 6; FIG.
7 is a sectional view of the assembly of FIG. 6;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator.

In the drawings, the same reference numerals are applied to the same names.

FIG. 1 is a perspective view illustrating an embodiment of the present invention, FIG. 2 is an exploded perspective view of the present invention, and FIG. 3 is an assembled sectional view of FIG. 1. Referring to these drawings, the present invention includes a waveguide 10, A clamping washer 30, a tightening screw 40 and a pair of nuts 50 and 60. The core 20 is inserted into the inner diameter of the waveguide 10,

The waveguide 10 is made of a hollow tube, and the outer peripheral surface thereof is formed with a threaded portion, and the inner peripheral surface thereof has an inclined diameter. That is, the diameter of the other end portion is smaller or larger than the diameter of the one end portion, and the inner circumferential surface thereof is formed to be inclined.

The core 20 is also inserted into the waveguide 10 such that the core 20 is also sloped like the inner diameter of the waveguide 10 so that it can be pulled from the large diameter side of the waveguide 10 and be tightly coupled with each other. have.

A plurality of guide grooves 21 are formed in the longitudinal direction of the outer circumferential surface of the core 20 so that the optical cable can pass therethrough. The guide grooves 21 are radially spaced apart from the outer circumferential surface of the core 20, Both end portions are open.

A thread groove 22 is formed on the side of the end of the core 20 having a smaller diameter, so that the tightening screw 40 is engaged.

It is preferable that the waveguide 10 and the core 20 have a length of about 4 to 5 times the diameter of the waveguide 10 for shielding electromagnetic waves.

The tightening washer 30 is disposed between the core 20 and the tightening screw 40. The tightening washer 30 is formed such that its diameter is at least larger than the small diameter of the waveguide 10, A groove 31 corresponding to the guide groove 21 of the core 20 is formed on the outer periphery of the fastening washer 30. The fastening washer 30 has an outer periphery extending over the side surface of the waveguide 10, So that it is communicated with the guide groove 21 when assembled with the core 20.

The tightening washer 30 is supported by the waveguide 10 and the core 20 is pulled by the tightening screw 40 when the tightening washer 40 is tightened with the tightening washer 30 positioned at the center So that the core 20 is press-fitted into the inner inclined surface of the waveguide 10.

On the other hand, a pair of nuts for fixing a waveguide to a wall or the like is assembled to the outer surface thread portion 11 of the waveguide 10. In the present invention, one of the nuts is formed as a fixing nut 50 integrally with the waveguide 10 And the other is assembled to the threaded portion 11 separately as the tightening nut 60. [

When the fixing nut 50 is integrally formed with the waveguide 10 so that the portion of the fixing nut 50 is pressed on the processing machine during the processing of the waveguide 10 to process the threaded portion 11 or the like, And the fixing nut 50 serves as a reference point at the time of use so that the mounting and assembling can be performed more easily and firmly.

Here, the fixing nut 50 may be positioned as needed depending on whether the inner peripheral diameter of the waveguide 10 is small or large.

In the drawings, reference numeral 70 denotes a washer.

FIG. 4 is a cross-sectional view illustrating an exemplary installed state of a waveguide according to the present invention. As shown in FIG. 4, the waveguide 10 of the present invention includes a wall 80 of a structure for shielding an EMC shielded room, A fixing nut 50 integrally formed on the outer periphery of the waveguide 10 is fitted to one side of the wall 80 while sandwiching the waveguide 10 in the assembly hole 81 formed in the wall 80 And then the fixing nut 60 is fixed to the wall body 80 by assembling the screw nut 11 on the other side.

The core 20 is inserted into the waveguide 10 while the optical cable 90 is inserted into the guide groove 21 of the core 20. At this time, an end portion corresponding to the small diameter of the core 20 is inserted into the waveguide 10 To the side corresponding to the large diameter of the large diameter.

The inserted core 20 is fastened to the screw groove 22 of the core 20 at the opposite side of the insertion direction by a fastening washer 40 between the core 20 and the fastening screw 40 When the tightening screw 40 is tightened, the tightening screw 40 pulls the core 20 in a state where the tightening washer 30 is supported on the side surface of the waveguide 10, Tightly fitting on the inner surface of the waveguide (10) to assemble firmly.

Since the assembly of the waveguide 10 does not require a separate part for assembling with the core 20 on the outer surface of the waveguide 10, it can be installed so as to have a sense of unity without being projected to the outside of the wall 80, It is possible to increase the usability of the system.

5 to 7 illustrate another embodiment of the present invention. Referring to FIG. 5 to FIG. 7, the inner diameter of the waveguide 10 and the outer diameter of the core 20 are inclined, and a tightening screw 40 and a tightening washer 30 are provided The guide groove 21 is not formed on the outer surface of the core 20 and the guide groove 21 is formed on the outer surface of the core 20 so that the waveguide 10 and the core 20 are in close contact with each other. And guide grooves 21 are formed on the inner peripheral surface.

When the guide groove 21 is formed on the inner surface of the waveguide 10 as described above, the core 20 enters and is fixed in close contact with the optical cable with the guide groove 21 interposed therebetween, 20 without being moved together with each other.

Since the guide groove 21 is formed on the inner surface of the waveguide 10, it is not necessary that the fastening washer 30 has grooves corresponding to the guide grooves 21, but the guide grooves 21 May be further formed.

In the drawings, the fixing nut 50 and the tightening nut 60 are separately provided on the threaded portion 11 of the waveguide 10, but in the preferred embodiments shown in FIGS. 1 to 4 The fixing nut 50 may be integrally formed with the waveguide 10.

The present invention as described and illustrated above is not intended to be limited to the above-described embodiment, and various modifications may be made without departing from the spirit of the present invention.

10; Waveguide 11; Thread
20; Core 21; Guide home
22; Screw groove 30; Fastening washer
31; Groove 40; Pressure screw
50; A fixing nut 60; Fastening nut
70; Washer 80; Wall
90; Optical cable

Claims (3)

A hollow waveguide having screws formed on its outer periphery and having inner diameters different from each other on both sides and having a plurality of guide grooves formed on its inner periphery in the longitudinal direction;
A pair of nuts assembled to the outer periphery of the waveguide;
A core having an outer periphery formed of an inclined surface corresponding to an inner diameter of the waveguide and a screw groove formed on a side of a small diameter;
A washer in which a plurality of recesses are formed radially; And
A tightening screw which is assembled to the thread groove of the core; And a waveguide for shielding the electromagnetic wave.

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