WO2009093678A1 - Electromagnetic-wave shielding fastener, and electromagnetic-wave shielding element using the fastener - Google Patents

Abstract

Provided is an electromagnetic-wave shielding fastener, which comprises one fastener tape (2) having many one-side fastener elements (4) fixed thereon, the other fastener tape (3) having many other-side fastener elements (5) fixed thereon for meshing with the one-side fastener elements (4), and a slider for engaging and disengaging the one and other fastener elements (4 and 5) with each other. The one and other fastener tapes (2 and 3) are molded into sheet shapes of a material containing a substance capable of shielding the electromagnetic waves. The one and other fastener elements (4 and 5) have one and other rising faces (4e and 5e) formed thereon. When the one and other fastener elements (4 and 5) are meshed by the slider, one-side intermediate portions (2c and 3c) of the one and other fastener tapes (2 and 3) are clamped and forced to contact by the one and other rising faces (4e and 5e).

Description

Electromagnetic wave shielding fastener and electromagnetic wave shielding body using the fastener

The present invention relates to an electromagnetic wave shielding fastener used when the electromagnetic wave shielding material is detachable or openable without impairing the electromagnetic wave shielding characteristics of the electromagnetic wave shielding material, and an electromagnetic wave shielding body using the electromagnetic wave shielding fastener. It is.

In recent years, IT devices and OA devices such as personal computers (hereinafter referred to as personal computers) have rapidly spread due to the development of IT (information technology), and these IT devices and OA are also used in normal home and work environments. The adverse effect of electromagnetic waves radiated from equipment on the human body has become a problem. On the other hand, the demand for society for a highly versatile electromagnetic wave shield body is rapidly increasing, such as the adverse effect of electromagnetic waves radiated from high power lines such as high voltage lines on IT equipment and OA equipment. Accordingly, various companies have developed and implemented a material for shielding electromagnetic waves or a sheet-like shield body for shielding such electromagnetic waves in response to such social demands.

By the way, there are cases where such sheet-like electromagnetic shielding material is used alone or attached to an IT device or OA device alone. On the other hand, a plurality of such electromagnetic shielding materials are connected or connected so that they are continuous. In many cases, the electromagnetic shielding material is connected by a fastener when a predetermined structure is obtained (see Patent Document 1). In addition, specific fasteners have also been proposed in order to improve the electromagnetic wave shielding characteristics of the portion where the fasteners are disposed (see Patent Documents 2 and 3). That is, depending on the use of the electromagnetic shielding material, the electromagnetic shielding material cannot be used alone, and when a plurality of electromagnetic shielding materials are used in combination, a fastener is often used. If there is a problem with the connecting part of the fastener, no matter how excellent the shielding properties of the electromagnetic shielding material used, the overall shielding properties will be inferior. Has been proposed.
JP-A-8-8578 JP 58-164290 A JP 2004-16688

However, in the fastener disclosed in Patent Document 1, even if an overlapping portion is formed at the connecting portion of the electromagnetic shielding material in which the fastener is disposed, the mutual electromagnetic shielding material is physically contacted. Cannot be guaranteed, and the shielding performance of electromagnetic waves is inferior. Moreover, in the fastener disclosed in the above-mentioned Patent Document 2, the electrically conductive fastener element and the electromagnetic wave shielding member are electrically connected, but there is no reliability of electrical conductivity between adjacent fastener elements, The electromagnetic wave shielding performance of the electromagnetic wave shielding material connected using this fastener is also inferior. In other words, in each conventional electromagnetic shielding fastener, even if the electromagnetic shielding performance of the electromagnetic shielding materials connected to each other through the fastener is good, the shape or structure of the entire conventional fastener is the cause. The electromagnetic wave shielding performance of the whole electromagnetic wave shielding body using the fastener is remarkably reduced.

Therefore, the present invention has been proposed in order to solve the problems of the above-described conventional electromagnetic wave shielding fastener and the electromagnetic wave shielding body using the fastener, without impairing the electromagnetic wave shielding performance of the electromagnetic wave shielding material. An object of the present invention is to provide a novel fastener for electromagnetic wave shielding capable of connecting the respective electromagnetic wave shielding materials and an electromagnetic wave shielding body using the fastener.

The present invention has been proposed in order to solve the above problems, and the first invention (the invention according to claim 1) is an electromagnetic wave shielding fastener in which a large number of fastener elements are fixed. One fastener tape, the other fastener tape to which a number of other fastener elements engaged with the one fastener element are fixed, and a slider for engaging and separating the one fastener element and the other fastener element. The one and the other fastener tapes are formed into a sheet shape from a material containing a material capable of shielding electromagnetic waves, and the one fastener element has one of the above-described one and the other fastener tapes. The upright surface is the other upright surface of the other fastener element, When the one and the other fastener elements are engaged with each other by the slider, the one-side halfway portion of the one and the other fastener tape is sandwiched between the one standing surface and the other standing surface. It is characterized by being pressed.

Here, the properties of the one and the other fastener tapes constituting the first invention are not particularly limited as long as they are formed into a sheet shape from a material containing a material capable of shielding electromagnetic waves. Examples of the material capable of shielding electromagnetic waves include metal fibers and metal wires such as gold, silver, copper, aluminum, tungsten, iron, and alloys thereof. Even when such metal fibers and metal wires are used, each metal fiber and metal wire need not be formed of a single metal capable of shielding electromagnetic waves, such as resin such as polypropylene, glass fiber, etc. A linear body in which the above metal is bonded or vapor-deposited on the inorganic fiber may be used. The fastener element and the slider constituting the first invention are not particularly limited in material and material, and a metal material or a resin material may be used. In addition, when resin is used as the material / material of the fastener element and the slider, it is possible to make a small fastener, and when the resin is used as the material of the fastener element and is molded in a small size, The pressure contact state of the fastener tape becomes stronger.

According to the first aspect of the present invention, when the one and the other fastener elements are engaged with each other by the slider, the one-side halfway portion of the one and the other fastener tapes includes the one standing surface and the other standing surface. It is necessary to be sandwiched between and pressed by. That is, in the first aspect of the invention, one of the fastener elements separated from each other (fixed to one fastener tape) and the other fastener element (fixed to the other fastener tape) are meshed by the slider. And the one side intermediate portion of the one and the other fastener tapes that have been separated so far are sandwiched between the one standing surface and the other standing surface, and as a result, the one and the other fastener tapes One side halfway part is press-contacted.

The second invention (the invention according to claim 2) is characterized in that one fastener tape in which a number of fastener elements each having one magnet embedded therein are fixed, and the other magnet in each interior. An electromagnetic shielding fastener comprising: a plurality of other fastener elements that are embedded and fixed to a plurality of other fastener elements that are magnetically attached to the one fastener element, wherein the one and the other fastener tapes are These are formed into a sheet shape from a material including a material capable of shielding electromagnetic waves, and one rising surface is formed on the one fastener element, and the other rising surface is formed on the other fastener element. When the one and other fastener elements are magnetized, the one and other fasteners are One side side middle portion of the tape and is characterized by comprising a pressure is clamped between one of the rising surface described above and the other rising surface.

Here, the properties of the one and other fastener tapes constituting the second invention are not particularly limited as long as they are formed into a sheet shape from a material containing a material capable of shielding electromagnetic waves. Examples of the material capable of shielding electromagnetic waves include metal fibers and metal wires such as gold, silver, copper, aluminum, tungsten, iron, and alloys thereof. Further, even when such metal fibers and metal wires are used, each metal fiber and metal wire need not be formed of a single metal capable of shielding electromagnetic waves, for example, resin such as polypropylene, glass fiber, etc. A linear body in which the above metal is bonded or vapor-deposited on the inorganic fiber may be used.

In the second aspect of the invention, when the one and the other fastener elements are magnetically attached, the one side intermediate portion of the one and the other fastener tape is formed by the one standing surface and the other standing surface. It is necessary to be sandwiched and pressed. That is, in the second invention, when one fastener element separated from each other (fixed to one fastener tape) and the other fastener element (fixed to the other fastener tape) are magnetically attached, The one-side halfway part of the one and the other fastener tapes that has been separated so far is sandwiched between the one standing surface and the other standing surface, and as a result, one side of the one and the other fastener tapes. The middle part on the side is pressed.

That is, the present invention is an electromagnetic wave shielding fastener, in which a number of one fastener element is fixed, and a number of other fastener elements meshed or magnetized with the one fastener element are fixed. The other fastener tape, and the above-mentioned one and the other fastener tape are both formed into a sheet shape from a material containing a material capable of shielding electromagnetic waves, One fastener element is formed with one upstanding surface, and the other fastener element is formed with the other upstanding surface. When the one and the other fastener elements are engaged or magnetized, the one and the other One side of the fastener tape It become pressed against is sandwiched by the other rising surface is characterized in.

A third invention (invention according to claim 3) is characterized in that, in the first or second invention, the one and the other fastener tapes are woven fabrics made of metal fibers or metal wires. It is.

In the third aspect of the invention, the one and the other fastener tapes are required to be woven fabrics made of metal fibers or metal wires. As described above, the metal fibers or metal wires are gold, silver, copper, aluminum. , Tungsten, iron, or alloys thereof. Each metal fiber or metal wire does not need to be formed of a single metal capable of shielding electromagnetic waves. For example, a linear body in which the above metal is bonded or vapor-deposited on a resin such as polypropylene or an inorganic fiber such as glass fiber. It may be.

Further, a fourth invention (invention according to claim 4) relates to an electromagnetic wave shield body using an electromagnetic wave shielding fastener, wherein the first invention (invention 1) and the second invention (invention). Item 2) or the third invention (invention 3), the other side of the fastener tape and the other fastener tape constituting the electromagnetic wave shielding fastener is made of a metal material capable of shielding electromagnetic waves. A sheet-like or plate-like electromagnetic shielding material is fixed, and the material of the one and the other fastener tape and the material of the electromagnetic shielding material contain a common metal.

In the fourth invention, the material of the one and the other fastener tape and the material of the electromagnetic wave shielding material need to contain a common metal. Here, “including a common metal” means that the material of the fastener tape and the material of the electromagnetic wave shielding material are the same metal, for example, a metal fiber or metal made of copper as the material of the fastener tape, for example. This includes the case where the metal element that is the material of the fastener tape and the metal element that is the material of the electromagnetic shielding material are common, such as when the electromagnetic shielding material is an alloy of copper and nickel. To tell.

The fifth invention (invention according to claim 5) is characterized in that, in the fourth invention, the material of the one and the other fastener tape and the material of the electromagnetic wave shielding material are the same metal. It is what.

The sixth invention (the invention according to claim 6) is the invention of the third, fourth or fifth invention, wherein one side of the electromagnetic wave shielding material fixed to the one fastener tape and the other fastener tape. The one side of the electromagnetic wave shielding material fixed to is contacted when the one and the other fastener elements are engaged with each other by the slider or when the one and the other fastener elements are magnetized. It is characterized by this.

In the first invention (the invention described in claim 1), the one-side halfway part of the one and the other fastener tape is directly pressed and clamped without the fastener element, so that the shape of the fastener or It is possible to effectively prevent a situation in which the shielding performance of the whole electromagnetic wave shield body is inferior due to the structure. Further, in this invention, since the material of the fastener element does not affect the electromagnetic wave shielding performance at all, the material and material of the fastener element are not particularly limited. Therefore, for example, resin can be used as the material and material. Become. Thus, when resin is used as the material of the fastener element, not only can the manufacturing cost be reduced, but the shape and size of the fastener element can be made extremely small. As a result, the pressure contact density is higher than when a fastener element molded from metal is used, and the electromagnetic shielding performance can be further improved.

In the second invention (the invention described in claim 2), the one-side halfway portion of the one and the other fastener tapes is directly press-contacted and sandwiched without the fastener element. It is possible to effectively prevent a situation in which the shielding performance of the whole electromagnetic wave shield body is inferior due to the shape or structure. Further, in this invention, since the material of the fastener element does not affect the electromagnetic wave shielding performance at all, the material and material of the fastener element are not particularly limited. Therefore, for example, resin can be used as the material and material. Become. Thus, when resin is used as the material of the fastener element, not only can the manufacturing cost be reduced, but the shape and size of the fastener element can be made extremely small. As a result, the pressure contact density is higher than when a fastener element molded from metal is used, and the electromagnetic shielding performance can be further improved.

In the third invention (the invention described in claim 3), since the one and the other fastener tapes are woven fabrics made of metal fibers or metal wires, the electromagnetic shielding performance can be further improved.

In the fourth invention (invention according to claim 4), the material of the one and the other fastener tape and the material of the electromagnetic wave shielding material contain a common metal, so that the electromagnetic wave shielding performance is further improved. Can do.

In the fifth invention (the invention described in claim 5), since the material of the one and the other fastener tape and the material of the electromagnetic wave shielding material are the same metal, the electromagnetic wave shielding performance is further improved. In addition, the one and the other fastener tapes and the electromagnetic shielding material can be fixed by welding, and the manufacturing cost can be reduced.

In the sixth invention, one side of the electromagnetic shielding material fixed to the one fastener tape and one side of the electromagnetic shielding material fixed to the other fastener tape are the one and the other fasteners. Since the elements are brought into contact with each other when they are meshed or magnetized, the shielding performance can be further improved. In particular, according to the sixth aspect of the present invention, the shield tape constituting the shield fastener can be used even when the shield performance is inferior to the shield performance of the shield material alone. In other words, according to the sixth invention, the material of the fastener tape can be expanded without being limited, and further, for example, according to the frequency band to be shielded, the shield material is a specific one. It is possible to shield an electromagnetic wave related to a frequency band, and the fastener tape can be made of a material that shields an electromagnetic wave in a frequency band not included in the frequency band. Further, according to the present invention, when a frequency band to be shielded is specified, a shielding material of a material that shields the band is selected and configured as a shield body. In this case, any shielding material is used. You can always use the same fastener tape. In particular, when the metal constituting the shield material and the metal constituting the fastener tape include a common metal, the shielding performance can be further improved. For example, when the shielding material is aluminum and the fastener tape is a composite fiber of aluminum and zinc, the shielding performance can be further improved.

The electromagnetic shielding fastener and electromagnetic shielding material which concern on the 1st Embodiment of this invention are shown, (a) is a top view of one side, (b) is a top view of the other side. FIG. 2 is a cross-sectional view of the opening shown in FIG. FIG. 3 is a cross-sectional view of the closed portion taken along the line BB in FIG. It is an enlarged view of the closed part shown in FIG.1 (b). It is a diagram which shows the electromagnetic wave shielding effect of the fastener for electromagnetic wave shielding which concerns on the 1st Embodiment of this invention, and an electromagnetic wave shielding material. It is a diagram which shows the electromagnetic wave shielding effect of the shielding material of a comparative example. The 2nd Embodiment of this invention is shown, (a) One and the other fastener tape are spaced apart, (b) is a top view which shows the state connected. It is CC sectional view taken on the line in FIG. FIG. 8 is a cross-sectional view taken along line DD shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electromagnetic wave shield fastener 2, 3 Fastener tape 2a, 3a Thick part 2b, 3b Base part 2c, 3c Press-contact part 2d, 3d Tape main-body part 4,5 Fastener element 4a, 5a Notch 4b, 5b Widening groove 4e, 5e Standing surface 4h, 5h Mating portion 6 Slider 10 Electromagnetic wave shield 11 Electromagnetic wave shielding material 12, 13 Opening

Hereinafter, the electromagnetic wave shielding fastener 1 according to the first embodiment for carrying out the present invention, the electromagnetic wave shielding body 10 using the electromagnetic wave shielding fastener 1, and the electromagnetic wave shielding fastener according to the second embodiment 20 and the electromagnetic wave shielding body 30 using the electromagnetic wave shielding fastener 20 will be described in detail with reference to the drawings.

As shown in FIG. 1, the electromagnetic wave shielding fastener 1 according to the first embodiment is meshed with one fastener tape 2 to which a number of one fastener element 4 is fixed and the one fastener element 4. The other fastener tape 3 is formed by fixing a number of other fastener elements 5 and a slider 6 that engages and separates the one fastener element 4 and the other fastener element 5. The one and the other fastener tapes 2 and 3 are alternately arranged with the one and the other fastener elements 4 and 5, and the slider 6 is interposed between the fastener elements 4 and 5 to move. By doing so, the fastener elements 4 and 5 are engaged or separated.

As shown in FIG. 1, the one and other fastener tapes 2 and 3 are woven fabrics formed in a long sheet shape having a predetermined width, and one and the other fasteners fixed to one side respectively. The elements 4 and 5 are connected by meshing (the state shown in the lower half of FIG. 1B), and the one and the other fastener elements 4 and 5 are separated (the upper half of FIG. 1B). The state shown in FIG. The material of these one and other fastener tapes 2 and 3 is a metal wire capable of shielding electromagnetic waves, and is a tin-plated copper wire tin-plated on the surface having a diameter of 50 μm. This tin-plated copper wire is Z-twisted and S-twisted (two twisted) around a bundle of a plurality of water-soluble polyester fibers to form a mixed yarn. The mixed yarn is woven as a mixed yarn fabric by a loom, and then the mixed yarn fabric is immersed in warm water at about 60 ° C. to dissolve the water-soluble polyester fiber, thereby one and the other fastener tapes as the fabric. 2 and 3 are made of a woven fabric made only of the tin-plated copper wire.

And, as shown in FIG. 2, one side of each of the one and the other fastener tapes 2 and 3 is woven by warps of the tin-plated copper wire that is thicker than the other parts, Thick portions 2a and 3a having a thickness larger than the widths of the notches 4a and 5a of the fastener elements 4 and 5 are formed, and the thick portions 2a and 3a are formed in the widened grooves 4b and 5b of the elements 4 and 5, respectively. The elements 4 and 5 are fixed to one side of the one and the other fastener tapes 2 and 3 by being inserted. In addition, base portions 2b and 3b that can be inserted into the cutouts 4a and 5a of the elements 4 and 5 are formed in the middle of the thick portions 2a and 3a of the one and the other fastener tapes 2 and 3, Press contact portions (one side intermediate portions) 2c and 3c bent so as to be able to come into contact with the rising surfaces 4e and 5e of the elements 4 and 5 are formed in the middle portions continuing to the base portions 2b and 3b. ing. On the other side continuous with the press contact portions 2c and 3c, tape main body portions 2d and 3d are formed which are bent so as to be in contact with the upper surfaces 4f and 5f of the elements 4 and 5.

In addition, the raw material of one and the other fastener tapes 2 and 3 is not limited to the above tin-plated copper wire, as long as it is formed into a sheet shape from a material containing a material capable of shielding electromagnetic waves, The property is not particularly limited. Examples of the material capable of shielding the electromagnetic wave include gold, silver, copper, aluminum, tungsten, iron, or alloys thereof, and metal fibers or metal wires in which zinc, tin, or the like is plated on the surface thereof. it can. Even when such metal fibers and metal wires are used, each metal fiber and metal wire need not be formed of a single metal capable of shielding electromagnetic waves, such as resin such as polypropylene, glass fiber, etc. A linear body in which the metal material is bonded or vapor-deposited on the inorganic fiber may be used.

Next, as shown in FIG. 2, the one and the other fastener elements 4 and 5 are arranged in the horizontal direction of the substantially central portion in which the cross section is resin-molded into a square-shaped symmetry. Cutouts 4a and 5a having a width capable of inserting 2 and 3 are formed. One fastener element 4 includes an upper half 4c constituting the upper side of the notch 4a and a lower half 4d constituting the lower side. Are integrally formed. The other fastener element 5 is integrally formed with an upper half 5c that forms the upper side of the notch 5a and a lower half 5d that forms the lower side. In addition, each of the portions communicating with the innermost part of the notches 4a and 5a is wider than the width of the notches 4a and 5a, and has a widened recess having a step at the boundary with the notches 4a and 5a. The grooves 4b and 5b are formed so as to be able to be inserted and fixed with the thick portions 2a and 3a of the one and the other fastener tapes 2 and 3, respectively.

Also, the upper half bodies 4c and 5c of the one and the other fastener elements 4 and 5 are provided with standing surfaces 4e and 5e that are erected upward from respective openings (reference numerals are omitted) of the notches 4a and 5a. These upstanding surfaces 4e and 5e are respectively formed with upper surfaces 4f and 5f that are orthogonal to each other, and one upstanding surface 4e and the other upstanding surface 5e are opposed to each other so as to alternate with each other at equal intervals ( (See FIG. 4). Further, the lower half bodies 4d and 5d of the one and the other fastener elements 4 and 5 are respectively formed with engaging portions 4h and 5h protruding from the standing surfaces 4e and 5e shown in FIG. As shown in FIG. 4, the meshing parts 4h and 5h include a convex part 4i projecting on both sides of one meshing part 4h, a convex part 5i projecting on both sides of the other meshing part 5h, and the other convex part adjacent to each other. One concave portion 4j continuously depressed with one convex portion 4i so as to be able to mesh with the portion 5i and the other concave portion 5j continuously depressed with the other convex portion 5i so as to be able to mesh with one adjacent convex portion 4i. Each is formed.

Then, as shown in FIG. 2, the one and the other fastener elements 4 and 5 have the widened grooves 4b and 5b of the fastener elements 4 and 5 on one side of the one and the other fastener tapes 2 and 3, respectively. Inserted into the formed thick portions 2a, 3a by an injection molding method, and as shown in FIG. 4, one fastener element 4 and the other fastener element 5 face each other so as to alternate with each other at equal intervals. Are arranged in large numbers. Therefore, since the widened grooves 4b and 5b are inserted into the thick portions 2a and 3a of the one and the other fastener tapes 2 and 3, the one and the other fastener elements 4 and 5 have the fastener elements 4 and 5 respectively. Even if a force acts in the direction of separating in the state where the two are engaged, the fastener elements 4 and 5 are prevented from falling off the fastener tapes 2 and 3.

Also, as shown in FIG. 2, the one and the other fastener tapes 2 and 3 in which the thick portions 2a and 3a are inserted into the widened grooves 4b and 5b of the one and the other fastener elements 4 and 5 are thick. Base portions 2b and 3b continuous with the portions 2a and 3a are inserted into the cutouts 4a and 5a, and the press contact portions 2c and 3c bent with respect to the base portions 2b and 3b are brought into contact with the standing surfaces 4e and 5e. Tape body portions 2d and 3d bent with respect to the pressure contact portions 2c and 3c are in contact with the upper surfaces 4f and 5f. The positional relationship between the fastener tapes 2 and 3 and the fastener elements 4 and 5 shown in FIG. 2 is such that the engaging portions 4h and 5h of the fastener elements 4 and 5 are in contact with guide portions (not shown) of the slider 6 shown in FIG. Is maintained by being engaged. The total thickness of the pressure contact portion 2c of the one fastener tape 2 and the pressure contact portion 3c of the other fastener tape 3 is such that the rising surface 4e of one fastener element 4 and the rising surface 5e of the other fastener element 5 are It is formed thicker than the distance in the closest state (see FIG. 3).

In order to connect the one and the other fastener tapes 2 and 3, the slider 6 interposed between the one and the other fastener elements 4 and 5 is moved by the gripping piece 7 (see FIG. 1). It connects by making the meshing parts 4h and 5h shown in FIG. 2 approach. That is, due to the approach of the meshing portions 4h and 5h, the convex portion 4i of one fastener element 4 shown in FIG. 4 is meshed with the concave portion 5j of the other fastener element 5, and the convex portion 5i of the other fastener element 5 is One of the fastener elements 4 is meshed with the recess 4j. As a result of these engagements, as shown in FIG. 3, the press contact portions 2c, 3c of the one and the other fastener tapes 2, 3 are sandwiched and pressed by the standing surfaces 4e, 5e of the fastener elements 4, 5. The tape body portions 2d and 3d of the fastener tapes 2 and 3 are connected in a state where they are substantially unified.

That is, the one and the other fastener tapes 2 and 3 have the tape main body portions 2d and 3d substantially unified in a state where the one and the other fastener elements 4 and 5 are engaged, and the one and the other fastener elements 4 Therefore, the shielding performance of the electromagnetic wave shielding fastener 1 can be improved. Further, the material of the one and the other fastener elements 4 and 5 and the slider 6 is not a necessary condition that the material can shield electromagnetic waves. For example, when the material of the fastener elements 4 and 5 is made of resin, the fastener elements 4 and 5 can be formed in a small size, so that one of the fastener elements 4 and the other fastener element 5 alternate with each other. Thus, since the opposing space | interval becomes small, the press-contact state by which the one and the other fastener elements 4 and 5 press-contact the one and the other fastener tapes 2 and 3 becomes firmer.

Next, the electromagnetic wave shielding body 10 using the electromagnetic wave shielding fastener 1 will be described. The electromagnetic wave shielding body 10 according to this embodiment is formed into a bag shape (not shown) by the electromagnetic wave shielding material 11 shown in FIG. 1, and the openings 12 and 13 of the electromagnetic wave shielding material 11 formed into the bag shape can be freely opened and closed. The electromagnetic wave shielding fastener 1 is fixed to the openings 12 and 13 to shield electromagnetic waves from the outside. The material of the electromagnetic wave shielding material 11 constituting the electromagnetic wave shielding body 10 is a metal wire capable of shielding electromagnetic waves, and is a tin-plated copper wire with a tin plating on the surface having a diameter of 50 μm. This tin-plated copper wire is Z-twisted and S-twisted (two twisted) around a bundle of a plurality of water-soluble polyester fibers to form a mixed yarn. The mixed yarn is woven as a mixed yarn fabric by a loom, and then the mixed yarn fabric is immersed in warm water at about 60 ° C. to dissolve the water-soluble polyester fiber. The fabric is made of only the tin-plated copper wire. That is, in this embodiment, the electromagnetic wave shielding material 11 is made of the same material as the one and the other fastener tapes 2 and 3. The material of the electromagnetic shielding material 11 is not necessarily the same as that of the one and the other fastener tapes 2 and 3. For example, when the one and the other fastener tapes 2 and 3 are tin-plated copper wires, The shield material 11 may be aluminum, and when the one and the other fastener tapes 2 and 3 are galvanized aluminum wires, the electromagnetic wave shield material 11 may be aluminum. However, the combination of aluminum and copper is not preferable because electromagnetic waves are easily transmitted.

In the electromagnetic wave shielding fastener 1, the tape body 2d of one fastener tape 2 is welded to the opening 12 on one side of the electromagnetic shielding material 11, and the tape body 3d of the other fastener tape 3 is electromagnetic wave. The shield member 11 is fixed by welding to the opening 13 on the other side. As shown in FIG. 3, the end portions 12a and 13a (see FIG. 2) of the one and other openings 12 and 13 of the electromagnetic wave shielding material 11 are in a state where the one and other fastener elements 4 and 5 are engaged with each other. Are welded to one and the other fastener tapes 2 and 3 so that they can contact each other. And since the said electromagnetic wave shielding body 10 and the one and other fastener tapes 2 and 3 are the same metal material of a tin plating copper wire, the said electromagnetic wave shielding body 10 improves electromagnetic shielding performance more. In addition, the openings 12 and 13 of the electromagnetic shielding material 11 and the one and the other fastener tapes 2 and 3 can be fixed by welding, and the electromagnetic shielding body 10 can be manufactured in a short time. Is possible. Further, the one and other openings 12 and 13 of the electromagnetic wave shielding material 11 come into contact with the respective end portions 12a and 13a in a state where the one and the other fastener elements 4 and 5 are engaged with each other, so that the shielding performance is further improved. Can be improved.

Next, the electromagnetic shielding effect of the electromagnetic shielding body 10 will be described with reference to FIGS. The electromagnetic wave shielding effect SE (dB) shown in each of these figures is obtained by making an electromagnetic wave E ₀ (V / m) incident on one surface of an electromagnetic shielding material 11 as a test object from a signal generator (not shown) via a transmission antenna. The electromagnetic wave E ₁ (V / m) transmitted to the other surface side of the electromagnetic wave shielding material 11 with respect to the incident electromagnetic wave E _{0 is} received by a receiving antenna (not shown) and measured by an electromagnetic wave intensity measuring device. Is obtained by
Electromagnetic shield effect SE (dB) = 20 log E ₀ / E ₁

The electromagnetic shielding effect SE of the electromagnetic shielding body 10 according to the present embodiment is measured by closing the openings 12 and 13 of the electromagnetic shielding material 11 with the electromagnetic shielding fastener 1 and externally transmitting electromagnetic waves having a frequency of 0 to 1000 MHz. The electromagnetic wave incident (transmitted) and transmitted through the electromagnetic wave shielding fastener 1 and the electromagnetic shielding material 11 in the vicinity thereof was measured by the KEC method. The measurement results are as shown in FIG. 5. When representative measurement values are extracted, the frequency of the electromagnetic wave is about 70 dB at 200 MHz, about 63 dB at 500 MHz, and about 62 dB at 800 MHz. FIG. 6 shows a measurement result of a comparative example for the electromagnetic wave shield body 10. The measurement of the comparative example is performed by entering (transmitting) an electromagnetic wave having a frequency of 0 to 1000 MHz from the outside. The electromagnetic wave which permeate | transmitted the shielding material which is not shown in the solid state (state which does not use a fastener) woven with the same metal material (tin plating copper wire) is measured based on the MIL standard. The electromagnetic wave shielding effect SE of this comparative example is as shown in FIG. 6. When representative measurement values are extracted, the electromagnetic wave frequency is about 67 dB at 200 MHz, about 76 dB at 500 MHz, and about 75 dB at 800 MHz.

And the electromagnetic shielding effect SE of the electromagnetic shielding body 10 based on the above measurement is almost the same as the shielding material of the comparative example that does not use a fastener. That is, this is due to the configuration of the electromagnetic wave shielding fastener 1, and as shown in FIG. 3, when the one and the other fastener elements 4, 5 are engaged, the one and the other fastener tapes 2, 3 are engaged. Are pressed by the raised surfaces 4e and 5e of the one and the other fastener elements 4 and 5, so that the tape body portions 2d and 3d of the fastener tapes 2 and 3 are substantially Since they are connected in a single-sided state and are sandwiched without passing through the one and the other fastener elements 4, 5, the electromagnetic wave shielding effect almost the same as that of the shield material of the comparative example can be obtained.

The electromagnetic wave shielding ratio with respect to the electromagnetic shielding effect SE is 90% when the electromagnetic shielding effect SE is 20 dB, 99% when the electromagnetic shielding effect SE is 40 dB, and 99.9% when the electromagnetic shielding effect SE is 60 dB. In this regard, in the electromagnetic wave shielding body 10, as shown in FIG. 5, it has been found that the electromagnetic wave shielding effect SE changes within a range of approximately 60 dB to 70 dB even when the frequencies are different. Therefore, by using the electromagnetic wave shielding fastener 1 in the openings 12 and 13 of the electromagnetic wave shielding material 11, the electromagnetic wave can be sufficiently shielded in a wide frequency band. The reason why the waveform of the measured value of the electromagnetic wave shielding effect SE shown in FIG. 5 is larger than the waveform of the measured value shown in FIG. 6 is that the electromagnetic wave shielding body 10 is formed in a bag shape. A drunkenness is caused by the influence of this drunkenness.

Next, a second embodiment will be described. The electromagnetic wave shielding fastener 20 according to this embodiment is different from the first embodiment in one and the other fastener elements 24 and 25 and the opening tool 26, and the one and the other fastener tapes 2 and 3 are the same. Therefore, the same components are denoted by the same reference numerals and detailed description thereof is omitted. As shown in FIG. 7, the electromagnetic wave shielding fastener 20 has one and the other fastener elements 24, 25 alternately arranged on one and the other fastener tapes 2, 3, and ends of the fastener elements 24, 25. An opening tool 26 is disposed in the portion, and the fastener elements 24 and 25 are magnetized or separated.

As shown in FIGS. 2 and 3, the fastener elements 24 and 25 have the one and the other fastener tapes 2 and 3 in the horizontal direction of a substantially central portion which is resin-molded in a symmetrical shape with a square cross section. Cutouts 24a and 25a having an insertable width are formed, and are integrally formed by upper half bodies 24c and 25c constituting the upper side of the notches 24a and 25a and lower half bodies 24d and 25d constituting the lower side. Has been. Further, each of the portions communicating with the innermost part of the cutouts 24a and 25a is widened more than the width of the cutouts 24a and 25a, and the widened recess having a step at the boundary with the cutouts 24a and 25a. Grooves 24b and 25b are formed so as to be able to be inserted and fixed with the thick portions 2a and 3a of the one and the other fastener tapes 2 and 3, respectively.

In addition, the upper half bodies 24c and 25c of the one and the other fastener elements 24 and 25 are respectively provided with standing surfaces 24e and 25e that are erected upward from respective openings (reference numerals are omitted) of the notches 24a and 25a. The upright surfaces 24e and 25e and upper surfaces 24f and 25f that are orthogonal to each other are formed, respectively, and one upright surface 24e and the other upright surface 25e are arranged so as to face each other alternately and at equal intervals ( (Refer FIG.7 (b)). Further, magnetized portions 24h and 25h projecting from the standing surfaces 24e and 25e shown in FIG. 8 are formed on the lower halves 24d and 25d of the one and the other fastener elements 24 and 25, respectively. Magnets 22 and 23 are embedded in the magnetized portions 24h and 25h, and the magnetic poles of the magnets 22 and 23 are magnetized between the adjacent fastener element 24 and the fastener element 25 as shown in FIG. 7B. It is possible to arrange an N pole on the upper side and an S pole on the lower side, respectively. The magnets 22 and 23 can be embedded in the vicinity of the standing surfaces 24e and 25e of the upper half bodies 24c and 25c.

Further, as shown in FIG. 7, an opening tool 26 is fixed to the end portions of the one and other fastener elements 24, 25, and one of the opening tools 26 has a holding member 27 having a concave groove (not shown). And a sliding contact plate 29 connected to the holding member 27, and the other has an insertion member 28 having a projection (not shown) that can be engaged with the concave groove, and the sliding contact plate connected to the insertion member 28. 29 and a sliding contact plate 30 that can be rotated around an engaging portion (not shown). The electromagnetic wave shielding fastener 20 is configured such that one and the other sliding contact plates 29 and 30 are overlapped to engage and rotate an engaging portion (not shown), and the insertion member 28 is inserted into the holding member 27. The other fastener elements 24 and 25 are magnetized to connect the one and the other fastener tapes 2 and 3.

Next, the electromagnetic wave shielding body 40 using the electromagnetic wave shielding fastener 20 will be described. The electromagnetic wave shielding body 40 is different from the first embodiment in the electromagnetic wave shielding fastener 20, and the electromagnetic wave shielding material 11 has the same material and shape (bag shape). Are denoted by the same reference numerals, and detailed description thereof is omitted. The electromagnetic wave shielding body 40 is configured such that the electromagnetic wave shielding fastener 20 is fixed to the openings 12 and 13 so that the openings 12 and 13 of the electromagnetic wave shielding material 11 shown in FIG. To do. In the electromagnetic wave shielding fastener 20, the tape body 2 d of one fastener tape 2 is welded to the opening 12 on one side of the electromagnetic shielding material 11, and the tape body 3 d of the other fastener tape 3 is electromagnetic wave. The shield member 11 is fixed by welding to the opening 13 on the other side. As shown in FIG. 9, one and the other fastener elements 24 and 24 are magnetically attached to the end portions 12a and 13a (see FIG. 8) of the one and other openings 12 and 13 of the electromagnetic shielding material 11, respectively. In the state, they are welded to one and the other fastener tapes 2 and 3 so that they can contact each other.

And since the electromagnetic wave shielding body 11 and the one and the other fastener tapes 2 and 3 are the same metal material of a tin-plated copper wire, the electromagnetic wave shielding body 40 can further improve the electromagnetic wave shielding performance. It becomes possible. Further, the one and other openings 12 and 13 of the electromagnetic shielding material 11 are more shielded because the respective end portions 12a and 13a are in contact with each other when the one and the other fastener elements 24 and 24 are magnetized. The performance can be improved. Further, the electromagnetic wave shielding effect of the electromagnetic wave shielding body 40 is that the electromagnetic wave shielding material 11 and the one and the other fastener tapes 2 and 3 are made of the same metal material as in the first embodiment. The same effect as the electromagnetic wave shielding effect SE shown in FIG.

The electromagnetic wave shielding fastener according to the present invention can be used for an electromagnetic wave shielding body configured in various forms by an electromagnetic wave shielding material, but effectively shields electromagnetic waves particularly by covering devices affected by electromagnetic waves. can do.

Claims (6)

One fastener tape in which a number of one fastener element is fixed,
The other fastener tape formed by fixing a number of other fastener elements meshed with the one fastener element;
A slider for meshing and separating the one fastener element and the other fastener element, and an electromagnetic wave shielding fastener comprising:
The one and other fastener tapes are both formed into a sheet from a material including a material capable of shielding electromagnetic waves,
The one fastener element has one standing surface, and the other fastener element has the other standing surface,
When the one and the other fastener elements are engaged with each other by the slider, the one-side middle portion of the one and the other fastener tape is sandwiched and pressed between the one standing surface and the other standing surface. An electromagnetic shielding fastener characterized by One fastener tape in which a number of one fastener elements each having one magnet embedded therein are fixed,
An electromagnetic shielding fastener comprising: the other magnet embedded therein, and the other fastener tape formed by fixing a number of other fastener elements that are magnetically attached to the one fastener element,
The one and other fastener tapes are both formed into a sheet from a material including a material capable of shielding electromagnetic waves,
The one fastener element has one standing surface, and the other fastener element has the other standing surface,
When the one and the other fastener elements are magnetically attached, one side intermediate portion of the one and the other fastener tape is sandwiched and pressed between the one standing surface and the other standing surface. An electromagnetic shielding fastener. 3. The electromagnetic wave shielding fastener according to claim 1 or 2, wherein the one and the other fastener tapes are woven fabrics made of metal fibers or metal wires. The other side of one fastener tape and the other fastener tape constituting the electromagnetic wave shielding fastener according to any one of claims 1 to 3 is formed into a sheet or plate shape by a metal material capable of shielding electromagnetic waves. An electromagnetic wave shielding body using an electromagnetic wave shielding fastener, wherein the first and second fastener tape materials and the electromagnetic shielding material include a common metal. 5. The electromagnetic wave shielding body using the electromagnetic wave shielding fastener according to claim 4, wherein the material of the one and the other fastener tapes and the material of the electromagnetic wave shielding material are the same metal. One side of the electromagnetic shielding material fixed to the one fastener tape and one side of the electromagnetic shielding material fixed to the other fastener tape are engaged with the one and other fastener elements by the slider. The electromagnetic wave shielding body using the electromagnetic wave shielding fastener according to claim 3, 4 or 5, wherein the electromagnetic wave shielding fastener is brought into contact with each other when the one and the other fastener elements are magnetized. .

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