JPH1070388A - Gasket for shielding electromagnetic wave - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a gasket being set in the gap of a conductive housing in order to shield electromagnetic wave passing through the gap in which the durability and the shape recovery properties are enhanced. SOLUTION: The gasket 2 comprises a columnar core member 4 formed of an elastic foamed material, and a sheet-like conductive coating material 6 applied to the periphery thereof wherein the conductive coating material 6 is a laminate of polyvinyl chloride 8, polyethylene terephthalate 10 and aluminum foil 12. The core member 4 and the conductive coating material 6 are bonded through both-sided adhesive tapes 14, 16 only on the upper and lower surface sides touching a conductive housing. More specifically, they are not bonded on the left and right sides where they do not touching the conductive housing and when the gasket 2 is compressed by the conductive housing, the conductive coating material 6 is simply bent slowly outward to the left and right sides and not deteriorated. Furthermore, since the core member 4 expands/ contracts uniformly, shape recovery properties of the gasket 2 are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gasket for shielding electromagnetic waves, which is sandwiched between gaps of a conductive casing and shields electromagnetic waves passing through the gap.

[0002]

2. Description of the Related Art Conventionally, as this kind of gasket for electromagnetic wave shielding, for example, as shown in FIG. 5 (A), an end of the gasket is formed around a side surface of a core material 32 formed in a rod shape by an elastic material. Conductive cloth 34 woven by conductive fibers
(For example, U.S. Pat. No. 4,857,668).

In addition, instead of the above-described conductive cloth 34, there has also been proposed one in which a wire mesh is covered around the side surface of the core material 32 (for example, Japanese Patent Application Laid-Open No. 2-296396).

[0004]

However, the above-described conventional gaskets for shielding electromagnetic waves (hereinafter, also simply referred to as gaskets) have the following problems. First, when the core material 32 is formed of a material such as a sponge or the like whose volume itself becomes small when compressed, the gasket is formed of the conductive casings 36a and 36b as illustrated in FIG. 5B. When used in a gap,
The core material 32 tries to shrink entirely in the compression direction.
Since the surface on the side not in contact with the second conductive casings 36a and 36b cannot be shrunk by the conductive cloth 34 or the wire mesh, the conductive cloth 34 or the wire mesh is eventually placed inside the compressed core material 32. As a result, the conductive cloth 34 and the wire mesh are creased and deteriorated. In an extreme case, the conductive cloth 34 or the wire mesh may be cracked, and the original shielding effect may not be obtained.

[0005] Further, when such a gasket is mounted on the mating portion of the conductive casing that opens and closes, the core material 32 is deformed by the folds generated in the conductive cloth 34 and the wire mesh, and the elasticity of the gasket itself is increased. That is, there is a problem that the restoring force gradually decreases, and the adhesion to the conductive housing deteriorates.

On the other hand, when the core material 32 is made of a material such as elastic rubber whose volume itself does not change much when compressed, the gasket is made of a conductive casing as shown in FIG. When used between the gaps 36a and 36b, the core material 32 shrinks not only in the compression direction but also expands in the direction perpendicular to the compression direction. There is a problem that stress is generated and the durability of the conductive cloth 34 and the wire mesh is reduced.

When such a gasket is mounted on the mating portion of the conductive casing which opens and closes, the core material 32 and the conductive material are opened and closed by the above-mentioned stress while the conductive casing is opened and closed many times. There is also a problem that a positional shift occurs with the cloth 34 or the like, the shape of the gasket itself does not return to its original shape, and the adhesion to the conductive housing deteriorates.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a gasket for electromagnetic wave shielding that is excellent in durability and shape restoration.

[0009]

That is, the present invention according to the first aspect of the present invention, which has been made to achieve the above object, comprises a core member formed in a rod shape by an elastic material, and a core material covered around a side surface of the core material. A sheet-shaped conductive covering material provided, and a gasket for shielding electromagnetic waves sandwiched by a gap between the conductive casings, the surface of the conductive covering material contacting the conductive casing. A gasket for electromagnetic wave shielding is characterized in that both inner sides or only one inner side are bonded to the core material.

According to a second aspect of the present invention, in the gasket for an electromagnetic wave shield according to the first aspect, the conductive covering material is formed by laminating a metal layer on a film material made of a synthetic resin. The gist of the invention is a gasket for electromagnetic wave shielding characterized by the following.

[0011]

The gasket for electromagnetic wave shielding according to the first aspect of the present invention, which is constructed as described above, is inserted into a gap between the conductive casings or mounted on a joint of the conductive casing which can be opened and closed. use. Then, due to the elasticity of the core material formed of the elastic material, the conductive coating material covered around the side surface is brought into close contact with the conductive housing, and the electromagnetic wave passing through the gaps between the conductive housings and between the joints is prevented. It can be shielded.

Here, in the gasket for electromagnetic wave shielding according to the first aspect, the inside of both sides or only one side of the surface of the conductive coating material that contacts the conductive housing is bonded to the core material. Have been. That is, on the surface of the gasket that does not contact the conductive housing, the conductive coating material and the core material are not bonded.

Therefore, according to the electromagnetic wave shielding gasket according to the first aspect, when the core material is formed of a material such as sponge, the volume of which itself becomes small when compressed, the gasket becomes conductive. Even when compressed by the housing, the conductive coating material is gradually bent outward without being bent inside the core material, so that the conductive coating material does not deteriorate. Further, since the core material can expand and contract in a well-balanced manner without being hindered by the conductive coating material, the original elasticity of the gasket can be maintained for a long period of time. There is no deterioration in adhesion to the housing.

When the core material is made of a material such as elastic rubber whose volume itself does not change much when compressed, the gasket is compressed by the conductive casing and the core material becomes conductive. Even if it bulges to the side that does not come into contact with the body, the core material and the conductive coating material are not bonded on that surface side, so the positional relationship between the two changes smoothly and extra stress is applied to the conductive coating material. Disappears. Then, when the gasket is no longer compressed, the positional relationship between the core material and the conductive coating material quickly returns to the original state, so that the resilience of the gasket itself does not decrease.

That is, according to the gasket for electromagnetic wave shielding according to the first aspect, excellent durability and resilience can be obtained regardless of the expansion and contraction characteristics of the core material.
As the conductive coating material, a conductive cloth or a wire mesh woven with conductive fibers can be used as in the above-described conventional gasket. In this case, the conductive coating material and the conductive casing are used. Since the body does not make perfect surface contact, for example, there is a limit in completely conducting the gap between the conductive casings and between the joints.

Therefore, in the gasket for electromagnetic wave shielding according to the second aspect, the conductive coating material is formed by laminating a metal layer on a film material made of synthetic resin. Therefore, according to the gasket for an electromagnetic wave shield according to claim 2, since the conductive casing and the conductive coating material can be brought into complete surface contact with the metal layer, the gap between the conductive casing and It becomes possible to conduct between the joining portions in a state of lower resistance. In this case, since the conductive coating material is formed by laminating a metal layer on a synthetic resin film material, the flexibility prevents the metal layer from cracking even when the gasket is compressed. In addition, even if a crack occurs in the metal layer, the crack remains only partially and does not spread.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 1 is an explanatory diagram for explaining a configuration of an electromagnetic wave shielding gasket of a first embodiment to which the present invention is applied.

As shown in FIG. 1A, the gasket 2 for shielding electromagnetic waves according to the present embodiment is formed in a column shape by an elastic foam material (for example, a member in which chloroprene or polyurethane is formed in a sponge shape). Core material 4 and a sheet-like conductive covering material 6 covered around the side surface of the core material 4
And

As shown in FIG. 1B, the conductive coating material 6 is formed by laminating a polyvinyl chloride (PVC) 8, a polyethylene terephthalate (PET) 10, and an aluminum foil 12, respectively. The thickness of each material is 100 μm for PVC 8, 25 μm for PET 10, and 12 μm for aluminum foil 12, respectively.

The conductive coating material 6 is gently wound around the core material 4 so that both side edges in the unfolded state meet at the center of the upper surface of the core material 4 in FIG. The material 4 is adhered and fixed by double-sided adhesive tapes 14 and 16 attached to the bottom surface and the upper surface, respectively. Further, a double-sided adhesive tape 18 for attaching the gasket 2 to a conductive casing to be described later is attached to a surface of the conductive coating material 6 on the mating portion 17 side. Is set to be smaller than the width. And double-sided adhesive tape 18
A release paper 20 is adhered to the surface of.

As shown in FIG. 1A, the width of the double-sided pressure-sensitive adhesive tapes 14 and 16 for bonding the core material 4 and the conductive coating material 6 is formed to be substantially the same as the width of the core material 4. However, it may be set smaller than the width of the core material 4. Also, the reason why the conductive coating material 6 is gently wound around the core material 4 is to prevent an extra stress from being applied to the aluminum foil of the conductive coating material 6. Therefore, on the two surfaces where the conductive coating material 6 is not adhered to the core material 4, a slight clearance is provided between the conductive coating material 6 and the core material 4 as shown in FIG. .

The gasket 2 configured as described above is
For example, as shown in FIG. 2A, the double-sided adhesive tape 18 from which the release paper 20 has been peeled off is adhered and fixed to the main body 22a of the openable and closable conductive housing. Then, in this state, as shown in FIG. 2 (B), when the lid 22b of the conductive casing is closed in the direction of the arrow, the gasket 2 is compressed, and the conductive coating material 6 is moved to the main body of the conductive casing. The electromagnetic wave that passes between the mating portions of the main body 22a and the lid 22b is cut off by being in close contact with the part 22a and the lid 22b, respectively.

In the gasket 2 of this embodiment,
Since the width of the double-sided adhesive tape 18 to be attached to the main body portion 22a of the conductive housing is smaller than the width of the core material 4,
When the lid 22b of the conductive casing is closed, as shown in FIG. 2 (B), the conductive coating material 6 securely adheres to the main body 22a of the conductive casing.

Here, in the gasket 2 of the present embodiment, the core material 4 and the conductive coating material are not provided on the surface of the conductive casing that does not contact the main body portion 22a and the lid portion 22b, that is, on the left and right surfaces in FIG. 6 is not bonded. Therefore, when the lid 22b of the conductive casing is closed, as shown in FIG. 2B, the conductive covering material 6 is gently curved outward without being bent inside the core material 4. Therefore, even if the lid 22b of the conductive casing is repeatedly opened and closed, the conductive covering material 6 does not deteriorate. In addition, since the core member 4 can be entirely expanded and contracted in the compression direction without being hindered by the conductive coating member 6, the original elasticity of the gasket 2 is maintained for a long period of time. And the adhesion between the main body portion 22a and the lid portion 22b of the conductive housing does not deteriorate.

In the gasket 2 of this embodiment, since the surface of the conductive coating 6 is made of aluminum foil, the conductive coating 6 and the main body 22a and the lid 22b of the conductive housing are provided.
The contact between the main body 22a and the lid 22b can be made more reliably. And since such conductive coating material 6 has sufficient flexibility by PET and PVC laminated inside the aluminum foil, it is also excellent in durability.

In the above-described embodiment, the core material 4 is formed by using an elastic foam material formed of chloroprene, polyurethane, or the like in a sponge shape. It may be formed of a material whose volume itself does not change much when it is formed. And in this case,
When the lid 22b of the conductive casing is closed, the core material 4 swells to the side not in contact with the main body part 22a and the lid 22b of the conductive casing. Since it is not bonded to the coating material 6, the positional relationship between the two changes smoothly, and no extra stress is applied to the conductive coating material 6. Further, when the lid 22b of the conductive casing is opened, the positional relationship between the core member 4 and the conductive covering material 6 returns to the original state promptly, so that the resilience of the gasket 2 itself does not decrease. is there.

According to the gasket 2 of the first embodiment, the above-described excellent effects can be obtained. However, when the gasket 2 is mounted on a conductive casing, the gasket 2 can be used.
If a large bending stress is applied in the longitudinal direction, the aluminum foil of the conductive coating material 6 may be cracked.

Next, as a second embodiment, a gasket for an electromagnetic wave shield capable of solving such a problem in handling will be described. As shown in FIG. 3A, the gasket 24 of the present embodiment is configured in exactly the same manner as the gasket 2 of the first embodiment, but the conductive coating 6
The only difference is that the cuts 26 are provided at equal intervals in advance on the two surfaces that are not in contact with the conductive casing.

The cut 26 is formed in the gasket 2
4 is provided in a direction perpendicular to the longitudinal direction,
Even if a bending stress is applied in the longitudinal direction of the gasket 24, the gasket 24 bends at the position of the cut 26, so that there is no fear that an unexpected crack is generated in the conductive coating material 6.

The gasket 2 constructed as described above
According to No. 4, even when the surface of the conductive casing that comes into contact has some irregularities, the surface of the conductive coating material 6 is easily deformed in accordance with the irregularities, so that the adhesion between the two may be impaired. Absent. Further, the operation of cutting the gasket 24 to a desired length becomes very easy.

Here, the gasket 24 illustrated in FIG. 3A has cuts 26 in two surfaces that are not in contact with the conductive housing.
However, as shown in FIG. 3B, the cuts 26 may be provided on three surfaces of the conductive coating material 6 other than the surface on which the double-sided adhesive tape 18 is adhered.

The reason why the notches 26 are not provided on all four surfaces of the conductive coating material 6 is that the cuts 2
This is because it is assumed that, after inserting the core material 4, the core material 4 is wound around the core material 4. For example, when the conductive coating material 6 is wound around the core material 4 and then the cut 26 is provided, the Notches 26 can be made on all sides.

Here, the first embodiment described above and the second embodiment
In the gaskets 2 and 24 of the embodiment, the conductive covering material 6 in which an aluminum foil is laminated on a resin is used while giving importance to the adhesion to the conductive housing, and no extra stress is applied to the aluminum foil. For this reason, on the two surfaces where the conductive coating material 6 and the core material 4 are not bonded, a slight clearance is provided between the two, but the conductive coating material 6 has greater elasticity. If it is, for example, FIG.
As shown in (A), the clearance between the conductive coating material 6 and the core material 4 on the two surfaces where they are not bonded may be eliminated.

In the gaskets 2 and 24 of the first and second embodiments, the core material 4 and the conductive coating material 6 are provided on both sides of the conductive coating material 6 in contact with the conductive housing. Are bonded by double-sided adhesive tapes 14 and 16,
Naturally, the bonding may be by an adhesive. Further, for example, as shown in FIG. 4B, the core member 4 and the conductive coating material 6 may be bonded only on one surface that comes into contact with the conductive housing. Further, in this case, for example, as shown in FIG. 4C, a large clearance may be provided between the core material 4 and the conductive coating material 6 as a whole. As shown in (D), a core material 28 having a substantially semicircular cross section may be used.

As described above, even when the shapes of the core members 4 and 28 and the locations where the conductive coating material 6 is adhered to the core members 4 and 28 are appropriately changed, excellent durability and resilience can be obtained as described above. Can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory view illustrating a gasket for shielding electromagnetic waves according to a first embodiment.

FIG. 2 is an explanatory diagram illustrating a usage state of the electromagnetic wave shielding gasket of the first embodiment.

FIG. 3 is an explanatory view illustrating a gasket for an electromagnetic wave shield according to a second embodiment.

FIG. 4 is an explanatory diagram illustrating another embodiment.

FIG. 5 is an explanatory view for explaining a conventional electromagnetic shielding gasket.

[Explanation of symbols]

2,24 ... gasket for electromagnetic wave shielding 4,28
... Core material 6 ... Conductive coating material 8 ... Polyvinyl chloride (PVC) 10 ... Polyethylene terephthalate (PET) 12 ... Aluminum foil 14,16 ... Double-sided adhesive tape

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 1, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

[0007] When such a gasket is mounted on the mating portion of the conductive casing that opens and closes, the above-mentioned stress causes the core material 32 to become electrically conductive with the conductive casing while the conductive casing is opened and closed many times. It occurs positional displacement between the cloth 34 or the like, the shape of the gasket itself is no longer return to the original, Ru mower problem adhesion between the conductive enclosure is deteriorated. Meanwhile
In addition, as a conductive coating material, as in the above-described conventional gasket,
A conductive cloth 34 or a wire woven by conductive fibers
If a mesh is used, the conductive coating
Since the body does not make perfect surface contact, a conductive housing
There is a limit to complete conduction between the gaps and the joints.
You. Moreover, the conductive cloth 34 is used as the conductive coating material.
In this case, fine dust is generated from the conductive cloth 34,
When wire mesh is used as the conductive coating material
There is dust and flowers in the air between the metal wires of the wire mesh
There is a risk that powders etc. may get in.
Cannot be used in the lounge room.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008] The present invention has been made in view of such problems, superior in recovery properties of durability and shape, moreover,
It is an object of the present invention to provide a high-performance electromagnetic shielding gasket that can be used anywhere .

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

[0009]

That is, the present invention according to the first aspect of the present invention, which has been made to achieve the above object, comprises a core member formed in a rod shape by an elastic material, and a core material covered around a side surface of the core material. comprising a sheet-like conductive coating material that has been set, the, is sandwiched in the gap between the conductive enclosure Te gasket odor electromagnetic wave shield for shielding electromagnetic waves, the conductive coating material is a synthetic resin
Formed by laminating a metal layer on a film material
It is, adhered Then before Kishirube conductive coating material electrically conductive both inside or either of the inner only the core material of the surface in contact with the housing of the
Both of the core material to which the conductive coating material is not bonded
On the side surface, a gap is provided between the core material and the conductive coating material.
A gasket for electromagnetic wave shielding characterized by being provided .

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Deleted

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

[0012] Here, in the electromagnetic shielding gasket according to claim 1, only the inner both inside or either of the surfaces in contact with the conductive housing of a conductive coating material so as to adhere to the core material And the conductive coating is adhered
On the side of the core that is not
A void is provided. For this reason, the gasket
The surface that does not contact the conductive housing
Material is not adhered, and between the core material and the conductive coating material.
Is provided with a gap.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

Therefore, according to the electromagnetic wave shielding gasket according to the first aspect, when the core material is formed of a material such as sponge, the volume of which itself becomes small when compressed, the gasket becomes conductive. Even when compressed by the housing, the conductive coating material may be bent inside the core material.
The conductive coating material is outwardly prevented.
Becomes gently curved. Therefore, the conductive coating material does not deteriorate. Further, since the core material can expand and contract in a well-balanced manner without being hindered by the conductive coating material, the original elasticity of the gasket can be maintained for a long period of time. There is no deterioration in adhesion to the housing.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction contents]

When the core material is made of a material such as elastic rubber whose volume itself does not change much when compressed, the gasket is compressed by the conductive casing and the core material becomes conductive. Even if it swells on the side that does not come into contact with the body, the core material and the conductive coating material are not adhered on that side.
Since the gaps are provided , the positional relationship between the two changes smoothly, and no extra stress is applied to the conductive coating material. Then, when the gasket is no longer compressed, the positional relationship between the core material and the conductive coating material quickly returns to the original state, so that the resilience of the gasket itself does not decrease.

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction contents]

[0015] That is, according to the electromagnetic shielding gasket according to claim 1, regardless of the stretch properties of the core material, Ru Nodea the restoration and excellent durability can be obtained.

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction contents]

Further , in the electromagnetic wave shielding gasket according to the first aspect, the conductive coating material is formed by laminating a metal layer on a film material made of synthetic resin. Therefore, the conductive enclosure and the electrically conductive coating material Ki de be completely surface contact with the metal layer, making it possible to conduct between the gap and the joint portion of the conductive enclosure with lower resistance state become able to. And, the conductive coating material, because it is formed by laminating a metal layer made of a synthetic resin film material, is a crack in the metal layer even if the gasket is compressed by the flexible occurs prevent are, also, even a crack occurs in the unlikely event the metal layer, it is not greens spread remains partial. And furthermore, a conductive coating material
Is formed by laminating a metal layer on a synthetic resin film material.
Dust generated from the conductive coating
Dust or pollen on the conductive coating.
No foreign matter adheres. Therefore, the electromagnetic wave
According to gaskets for cleaning
Even in places where dust cannot enter.
Can be used with your heart. As described in claim 1,
According to the gasket for electromagnetic wave shielding described above, excellent durability
Performance and resilience, as well as the conductive casing
Conduct between gaps and joints with lower resistance
High performance everywhere.
Can be.

[Procedure amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction contents]

As shown in FIG. 1A, the width of the double-sided pressure-sensitive adhesive tapes 14 and 16 for bonding the core material 4 and the conductive coating material 6 is formed to be substantially the same as the width of the core material 4. However, it may be set smaller than the width of the core material 4. The reason why the conductive coating material 6 is gently wound around the core material 4 is to prevent the conductive coating material 6 from being stressed. Thus, the two faces electrically conductive coating material 6 is not bonded to the core 4, as shown in FIG. 1 (A), the clearance of the gap between the conductive coating material 6 and the core 4 is provided with Become.

[Procedure amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0024

[Correction method] Change

[Correction contents]

Here, in the gasket 2 according to the present embodiment, the core material 4 and the conductive coating material are not provided on the surface of the conductive casing which does not contact the main body portion 22a and the lid portion 22b, that is, on the left and right surfaces in FIG. 6 and the core 4 and the conductive coating 6
There is a clearance between them. Therefore, when the lid 22b of the conductive casing is closed, as shown in FIG. 2B, the conductive covering material 6 is gently curved outward without being bent inside the core material 4. Therefore, even if the lid 22b of the conductive casing is repeatedly opened and closed, the conductive covering material 6 does not deteriorate. In addition, since the core member 4 can be entirely expanded and contracted in the compression direction without being hindered by the conductive coating member 6, the original elasticity of the gasket 2 is maintained for a long period of time. And the adhesion between the main body portion 22a and the lid portion 22b of the conductive housing does not deteriorate.

[Procedure amendment 13]

[Document name to be amended] Statement

[Correction target item name] 0025

[Correction method] Change

[Correction contents]

Moreover, in the gasket 2 of this embodiment , since the surface of the conductive covering material 6 is an aluminum foil 12 ,
The conductive covering material 6, the main body 22a of the conductive housing, and the lid 2
The contact with the surface 2b is performed on the surface, so that the body 22a and the lid 22b can be more reliably conducted. Then, such conductive coating material 6 is provided with the sufficient flexibility I by <br/> the PE T10 and PV C8 stacked on the inside of the aluminum foil 12, excellent durability Tei Ru. Further, the conductive coating material 6 is made of PVC 8 and P
It is formed by laminating aluminum foil 12 on ET10.
Therefore, fine dust is generated from the conductive coating material 6 or
Foreign matter such as dust and pollen in the air adheres to the conductive coating material 6
Nothing. Therefore, according to this gasket 2, the semiconductor
When dust invades like a clean room in a body factory
Can be used in places where it is not good.

[Procedure amendment 14]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction contents]

In the above-described embodiment, the core material 4 is formed by using an elastic foam material formed of chloroprene, polyurethane, or the like in a sponge shape. It may be formed of a material whose volume itself does not change much when it is formed. And in this case,
When the lid 22b of the conductive casing is closed, the core material 4 swells to the side not in contact with the main body part 22a and the lid 22b of the conductive casing. Since the coating material 6 is not adhered and a clearance is provided , the positional relationship between the two changes smoothly, so that no extra stress is applied to the conductive coating material 6. Further, when the lid 22b of the conductive casing is opened, the positional relationship between the core member 4 and the conductive covering material 6 returns to the original state promptly, so that the resilience of the gasket 2 itself does not decrease. is there.

[Procedure amendment 15]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Deleted

[Procedure amendment 16]

[Document name to be amended] Statement

[Correction target item name] 0034

[Correction method] Change

[Correction contents]

In the gaskets 2 and 24 of the first and second embodiments, the core material 4 and the conductive coating material 6 are provided on both sides of the conductive coating material 6 in contact with the conductive housing. Are bonded by double-sided adhesive tapes 14 and 16,
Naturally, the bonding may be by an adhesive. Further, for example, as shown in FIG. 4 (A), only one surface in contact with the conductive enclosure may be bonded to a core material 4 and the electrically conductive coating material 6. And further in this case, for example, as shown in FIG. 4 (B), it may be previously provided with a generally large clearance between the core 4 and the conductive coating material 6, also, FIG. 4 As shown in (C) , a core material 28 having a substantially semicircular cross section may be used.

[Procedure amendment 17]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction contents]

As described above, even when the shapes of the core members 4 and 28 and the positions where the conductive coating material 6 is adhered to the core members 4 and 28 are appropriately changed, the excellent durability and the excellent
It can provide resilience and the main body of the conductive housing
22a and the lid 22b can be conducted more reliably.
Clean loop that dust must not enter.
Can also be used in the system.

[Procedure amendment 18]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

Claims (2)

[Claims] 1. A core material formed in a rod shape by an elastic material, and a sheet-shaped conductive covering material covered around a side surface of the core material, and are sandwiched between gaps of a conductive casing. An electromagnetic wave shielding gasket for shielding an electromagnetic wave, wherein both the inside or only one inside of a surface of the conductive covering material that contacts the conductive housing is adhered to the core material. Gasket for shielding. 2. The electromagnetic wave shielding gasket according to claim 1, wherein the conductive coating material is formed by laminating a metal layer on a film material made of synthetic resin. Gasket.