JPH11145670A - Gasket for shielding electromagnetic wave - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gasket for shielding electromagnetic wave excellent in rust resistance in which high electromagnetic wave shielding effect is sustained over a long term. SOLUTION: A stick finger member 2 is formed integrally of a thin plate material having conductivity and elasticity (metallic material, synthetic resin material having plated surface, etc.). A rustproof member 3 comprises a core member 11 of continuous foam material containing a volatile rust preventives fixed unseparably to the stick finger member 2, and an airtight coating material 12 applied around the side face of the core member 11. A plurality vents A are made in the side face of the coating material 12 such that they can be opened/closed by tongues 13 formed by making a U-cut. When the core member 11 is compression deformed, the tongue 13 is developed outward to open the vent A. Rust preventives evaporated from the core member 11 is discharged through the vent A and adheres to the stick finger member 2 thus forming a coating of rust preventives on the surface thereof.

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, and more particularly, to a gasket for shielding electromagnetic waves, which is disposed in a gap between conductive members and shields an electromagnetic wave passing through the gap. .

[0002]

2. Description of the Related Art Conventionally, a rectangular flat base made of an elastic metal thin plate, an arch which is bent at a side edge of the base and is formed in an arch on the base, and a side edge of the arch An electromagnetic wave shield formed by a thin plate spring comprising a plurality of protruding pieces provided at regular intervals along the portion, the tip portion of each protruding piece bent toward the base side, the base portion and the arch portion There is known a gasket for use (for example, Japanese Utility Model Laid-Open No. 3-69294). Note that such an electromagnetic wave shielding gasket is generally called a stick finger because stick-shaped protruding pieces are arranged in parallel and the appearance is finger-like.

[0003] The gasket for electromagnetic wave shielding is provided, for example, between the main body and the lid so that the base is fixedly connected to the main body of the conductive housing and the arch contacts the lid of the conductive housing. Is inserted into. Then, when the lid is closed with respect to the main body of the conductive housing, and the gasket for electromagnetic wave shielding is pressed between the main body and the lid, the arch portion closes the lid by the spring force of the thin plate spring. By press-contacting, the main body and the lid are electrically connected. Therefore, the gap between the main body and the lid of the conductive housing is almost completely filled with the electromagnetic wave shielding gasket, and the electromagnetic waves that pass through the gap can be shielded.

[0004]

When the above-mentioned gasket for electromagnetic wave shielding is used for the housing of an electric / electronic device installed outdoors, the elastic metal sheet may be oxidized and rusted by rain or moisture. . When nonconductive rust is generated in the elastic metal sheet, electromagnetic waves easily pass through the rusted portion. Then, when the rust progresses to the deep portion of the elastic metal sheet and a missing portion is formed in each protruding piece, the electromagnetic wave passes through the missing portion. Therefore, there is a problem that the electromagnetic wave shielding effect is reduced. Further, if rust generated in the electromagnetic wave shielding gasket falls into the housing and adheres to the housed electronic equipment, there is a possibility that the electronic equipment is soiled or a failure occurs.

Therefore, conventionally, a method of improving rust resistance by applying a rust-proof plating treatment to the surface of the elastic metal sheet has been adopted. However, even if the surface of the elastic metal sheet is subjected to rust-preventive plating, there is a problem that it is difficult to prevent the generation of rust in long-term use.

[0006] A technique for replacing an elastic metal sheet with an elastic synthetic resin sheet having a plated surface has also been disclosed, but also in this case, if non-conductive rust is generated in the plating,
Since the electromagnetic wave easily passes through the rusted part,
There is a problem that the electromagnetic wave shielding effect is reduced.

[0007] By the way, not only does the electromagnetic wave trying to pass through the gap between the main body and the lid of the conductive housing be blocked,
It may be required to close the gap and seal it. For example, as for a housing of an electric / electronic device installed outdoors, it is necessary to prevent infiltration of wind, rain, and dust into the housing, and thus it is indispensable to improve the airtightness of the housing.

Therefore, conventionally, a sealing gasket for closing and sealing the gap between the main body portion and the lid portion of the conductive housing has been proposed.
A method of attaching the gasket separately from the electromagnetic wave shielding gasket has been adopted. Therefore, there is a problem that a contractor for installing the gasket for shielding electromagnetic waves requires a cost for storing and managing the sealing gasket which is a separate part, and the number of man-hours is increased by an amount corresponding to the mounting work of the gasket for sealing.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to maintain a high electromagnetic wave shielding effect for an electromagnetic wave that is going to pass through a gap between conductive members for a long period of time. An object of the present invention is to provide a gasket for an electromagnetic wave shield which is excellent in rust prevention and can be made. Another object of the present invention is to provide a low-cost electromagnetic wave shielding gasket that can seal the gap between the conductive members while achieving the above object.

[0010]

Means for Solving the Problems According to the first aspect of the present invention, there is provided a spring member having at least a portion formed of metal and having a spring property, and a spring member having a spring property. The gist of the invention is to provide a rust preventive member for supplying a rust preventive.

Therefore, according to the present invention, the rust preventive agent supplied from the rust preventive member can prevent the metal forming the spring member from rusting, so that the spring member is disposed in the gap between the conductive members. When the electromagnetic wave is provided to block electromagnetic waves that pass through the gap between the conductive members, a high electromagnetic wave shielding effect can be maintained for a long period of time.

Next, a second aspect of the present invention is the first aspect.
In the gasket for electromagnetic wave shielding described in the above, the gist is that the spring member is formed of a thin plate material and a plurality of pores penetrating the front and back surfaces of the thin plate material. Therefore, according to the present invention, the rust preventive supplied from the rust preventive member to the spring member spreads over the entire front and back surfaces of the spring member through the pores. And the rust prevention of the spring member can be enhanced.

Next, a third aspect of the present invention is directed to the first aspect.
Alternatively, in the gasket for shielding electromagnetic waves according to claim 2, the gist is that the rust-preventive member includes a sheet material containing a rust-preventive agent, and the sheet material is in contact with at least a part of the spring member. .

Therefore, according to the present invention, since the rust preventive oozed or released from the sheet material spreads from the portion in contact with the spring member to the surface of the spring member, the rust preventive agent coating is applied to the entire surface of the spring member. It can be easily formed, and the rust prevention of the spring member can be enhanced.

Next, a fourth aspect of the present invention is directed to the first aspect.
4. The electromagnetic wave shielding gasket according to any one of 3 to 3, wherein the rust-preventive member comprises a core material made of an elastic material containing a rust-preventive agent, and a covering material provided around the core material. 5. The gist is that a volatile rust inhibitor is held in the interior covered by the coating material, and at least a part of the coating material is configured to be able to discharge the vaporized rust inhibitor to the outside. And

Therefore, in the present invention, the rust preventive held inside the protective member covered with the coating material evaporates gradually. Since at least a part of the coating material is configured to be able to release the vaporized rust preventive agent to the outside, the rust preventive material is released to the outside. The released rust inhibitor adheres to the spring member and forms a rust inhibitor coating on the entire surface of the spring member.
Therefore, if the release portion of the rust inhibitor in the coating material is directed toward the spring member, the released rust inhibitor can be securely attached to the spring member.

Next, the invention according to claim 5 is directed to claim 4
In the gasket for electromagnetic wave shielding described in the above, the gist of the present invention is that the coating material has airtightness and has a ventilation hole through which the vaporized rust inhibitor passes. Therefore, according to the present invention, since the coating material has airtightness, it is possible to prevent the rust inhibitor from being wastefully released to the external space, and to supply the rust inhibitor in a direction requiring the supply of the rust inhibitor. If a vent hole is formed only in the rust preventive, the rust inhibitor can be used effectively.

Next, the invention according to claim 6 is directed to claim 5
In the gasket for an electromagnetic wave shield described in the above, the gist is that the ventilation hole is formed in a slit shape so as to be opened by deformation of the rust prevention member. Therefore, according to the present invention, only when the mounting portion of the rust preventive member is deformed by being sealed, the vent is opened and the rust preventive material is released, so that the rust preventive material is not wasted. It can be used effectively.

Next, the invention according to claim 7 is directed to claim 4
The gist of the gasket for electromagnetic wave shielding according to any one of Items 1 to 6, wherein the core is made of a foamed material having open cells. Thus, according to the present invention,
Since the core material can be impregnated with a liquid, a liquid rust preventive material can be used. In addition, when a gel or solid rust inhibitor is used, the core material also has air permeability, so even if the rust inhibitor is placed anywhere inside the coating material,
The rust inhibitor can be released in any direction.

Next, the invention according to claim 8 is directed to claim 7
In the gasket for electromagnetic wave shielding according to the above, the gist is that at least one storage portion for injecting or storing the rust preventive agent is provided in the core material.
Therefore, according to the present invention, when using a liquid rust inhibitor,
If a rust preventive is injected into the storage section, the rust preventive can be quickly impregnated into the entire core material. When a gel or solid rust preventive is used, if the rust preventive is stored in the storage section, the rust preventive is unevenly distributed inside the core material and prevents free deformation of the rust preventive member. Can be prevented.

Next, the invention according to claim 9 is based on claim 8
In the gasket for electromagnetic wave shielding described in the above, the gist of the present invention is to provide a communication hole for communicating the external space of the core material with the storage portion in the core material. Therefore, according to the present invention, the rust inhibitor can be efficiently released in a desired direction by opening the communication hole in the direction in which the rust inhibitor is to be released.

According to a tenth aspect of the present invention, in the gasket for an electromagnetic wave shield according to any one of the fourth to sixth aspects, the core material is made of a foamed material having single cells, The gist of the present invention is to provide at least one storage portion for injecting or storing the rust preventive agent in the material, and to provide a communication hole for communicating the external space of the core material with the storage portion. .

Therefore, according to the present invention, since the core material has airtightness, the rust preventive in the storage portion is released to the outside through the communication hole when vaporized. Therefore, the covering material can be omitted. When a covering material is used, it is desirable to form a communication hole toward the ventilation hole.

According to an eleventh aspect of the present invention, in the gasket for an electromagnetic wave shield according to the first or second aspect, the spring member is disposed in a gap between the conductive members and passes through the gap. The gist is that a sealing member that shields the electromagnetic wave to be closed and closes and seals the gap is connected to the rust prevention member.

Therefore, in the present invention, the sealing member is connected to the rust-preventive member and constitutes a gasket for electromagnetic wave shielding as one component. Therefore, it is not necessary for the contractor of the electromagnetic wave shielding gasket installation installer to store and manage the sealing member as a separate component from the electromagnetic wave shielding gasket, and it is not necessary to install only the sealing member. be able to.

Next, the invention according to claim 12 is the gist of the electromagnetic wave shielding gasket according to claim 11, wherein the sealing member is integrally formed of the same material as the rust prevention member. Therefore, according to the present invention, the sealing member can be easily manufactured, and a low-cost gasket for shielding electromagnetic waves can be obtained.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention will be described below with reference to the drawings. FIG.
1 is a perspective view of an electromagnetic wave shielding gasket 1 of the present embodiment.

The electromagnetic shielding gasket 1 includes a stick finger member 2 as a spring member and a rust prevention member 3. The stick finger member 2
A base portion 4 having a rectangular flat plate shape, an arch portion 5 bent at a side edge portion 4a of the base portion 4 and formed in an arch shape on the base portion 4 and fixed along a side edge portion 5a of the arch portion 5 It is provided with a plurality of projecting pieces 6 provided at intervals, and is formed by a thin plate spring composed of a tip end of each projecting piece 6 bent toward the base 4 side, the base 4 and the arch 5.

Then, a double-sided adhesive tape 7 is attached to the base 4 of the stick finger member along the longitudinal direction. A release paper 8 is adhered to the surface of the double-sided adhesive tape 7. The width of the double-sided adhesive tape 7 is set smaller than the width of the base 4, and the side edge 4 a side of the base 4 is exposed from the double-sided adhesive tape 7.

The parts 4 to 6 of the stick finger member 2 are integrally formed by pressing a conductive and elastic thin plate material. Examples of such a thin plate material include an elastic metal material (such as beryllium copper and phosphor bronze) and an elastic synthetic resin material whose surface is plated.

The rust preventive member 3 includes a core material 11 and a coating material 12 and is irremovably sandwiched between the base 4 and the arch 5 of the stick finger member 2. Core material 11
Is formed in a substantially semi-cylindrical shape by a foam material having open cells and contains a volatile, liquid, gel, or solid rust inhibitor. The covering material 12 is in the form of an airtight sheet covered around the side surface of the core material 11.

On the side surface of the covering material 12, there are provided a plurality of ventilation holes A which can be opened and closed by a tongue-shaped piece 13 formed by cutting the side surface into a U-shape.
By the way, as a foaming material for forming the core material 11, there is a foaming material obtained by foaming a polymer material (chloroprene, neoprene, samptoprene, polyurethane, or the like) into a sponge shape.

Examples of the rust preventive impregnated in the core material 11 include those composed of a tungsten oxide salt, a phosphonate, an aminotrismethylene phosphonic acid, an organic phosphate, an amiphosphate, and a molybdate. However, any liquid, gel, or solid rust preventive having volatility may be used. Specific components and the like of these rust preventives are disclosed in, for example, JP-A-7-256092 and JP-A-7-186289.

As a sheet material for forming the covering material 12, there is a sheet material in which polyvinyl chloride (PVC) and polyethylene terephthalate (PET) are laminated. Next, a method of using the electromagnetic shielding gasket 1 configured as described above will be described with reference to FIGS.

First, as shown in FIG. 2, the base 4 is disposed so as to be in contact with the main body 21a of the conductive housing. Then, the electromagnetic shielding gasket 1 is bonded and fixed to the main body portion 21a of the conductive housing by the double-sided adhesive tape 7 from which the release paper 8 has been peeled off. In this state, the side edge 4a side of the base 4 exposed from the double-sided adhesive tape 7 is in close contact with the main body 21a of the conductive housing, and the base 4 and the main body 21a of the conductive housing are electrically connected to each other. Therefore, double-sided adhesive tape 7
It is necessary to set the width and the bonding position on the base portion 4 so that the base portion 4 and the main body portion 21a of the conductive housing can surely adhere to each other with a sufficient area.

In this state, the ventilation hole A is kept closed by the tongue 13. Next, as shown in FIG. 3, when the lid 21b of the conductive housing is closed in the direction of arrow X, the arch 5 is pressed between the main body 21a and the lid 21b, and the arch is formed by the spring force of the thin plate spring. The section 5 presses the lid 21b side, and the main body 21a and the lid 21b are connected to each other via the stick finger member 2 so as to be conductive. As a result, the gap between the main body portion 21a and the lid portion 21b of the conductive housing is almost completely filled by the stick finger member 2, and it is possible to shield the electromagnetic waves that pass through the gap.

Further, the main body 21a of the conductive housing and the lid 2
1b, the rust preventive member 3 sandwiched between the base portion 4 and the arch portion 5 is compressed, and the core material 11 is pressed.
Is deformed. In this state, the side surface of the covering material 12
Although the width between the side surfaces is increased in accordance with the deformation of the core material 11, the tongue-shaped pieces 13 formed on the side surfaces of the coating material 12
It does not deform integrally with the covering material 12, so that the tongue 13
Is developed outward, and the ventilation hole A is opened.

Incidentally, the rust preventive impregnated in the core material 11 is gradually vaporized. Therefore, when the rust preventive member 3 is not compressed and deformed, the tongue-shaped piece 13 blocks the ventilation hole A, and the vaporized rust preventive (hereinafter, referred to as the vaporized rust preventive G) has airtightness. Fill the inside of the coating. When the rust preventive member 3 is compressed and deformed, the ventilation hole A is opened and the volume inside the coating material 12 is reduced.
The vaporized rust inhibitor G filling the inside of the coating material 12 is released from the ventilation holes A. Then, according to the rate at which the rust preventive impregnated in the core material 11 evaporates, the vapor rust preventive G
Continues to be released.

The vaporized rust inhibitor G released from the vent A
Adheres to the arch portion 5 of the stick finger member 2 and spreads on the surface of each of the portions 4 to 6 of the stick finger member 2 by surface tension to form a rust preventive coating on the entire surface of the stick finger member 2. Here, by forming the air hole A toward the stick finger member 2 side, the rust preventive released from the air hole A can be reliably adhered to the stick finger member 2.

Therefore, even if the conductive housing is installed outdoors and exposed to rain, moisture, etc., the stick finger member 2
Rust can be reliably prevented from forming on the metal material or the plating on the surface over a long period of time.
As a result, the electromagnetic shielding effect of the electromagnetic wave shielding gasket 1 can be maintained for a long period of time. Since rust does not occur on the electromagnetic wave shielding gasket 1, it is also possible to prevent the rust from dropping into the conductive housing, thereby preventing the electrical and electronic equipment from being stained or broken.

Further, only when the lid 21b of the conductive housing is closed, the ventilation hole A is opened and the vaporized rust inhibitor G is released, and when the lid 21b is open, the ventilation hole A is closed. Since the vaporized rust inhibitor G is not released, the vaporized rust inhibitor G
Is not wasted, and the rust preventive impregnated in the core material 11 can be used effectively.

Since the core material 11 is formed of a foamed material having open cells, when a liquid or gel rust inhibitor is used, the core material 11 is easily impregnated with the rust inhibitor. When a solid rust inhibitor is used,
Since the core material 11 has air permeability, the vaporized rust inhibitor G can be released in any direction, regardless of where the rust preventive agent is disposed.

Further, the rust preventive member 3 is non-detachably sandwiched between the base portion 4 and the arch portion 5 of the stick finger member 2, and constitutes the electromagnetic shielding gasket 1 as one component. Therefore, for the installer of the electromagnetic wave shielding gasket 1, there is no need to store and manage the rust preventive member 3 as a separate component from the electromagnetic wave shielding gasket 1, and there is no need to install only the rust preventive member 3. The costs associated with them can be reduced.

Next, modifications of the first embodiment, which are partially modified, will be described with reference to FIGS. In each modification, the same components as those of the electromagnetic shielding gasket 1 of the first embodiment have the same reference numerals, and a detailed description thereof will be omitted. In each of the modified examples shown in FIGS. 4 and 5, the only difference from the electromagnetic wave shielding gasket 1 of the first embodiment is the configuration of the rust prevention member 3.

The modification shown in FIG. 4A is obtained by removing the covering material 12 from the rust preventive member 3 in the first embodiment. When the core material 11 is exposed excluding the coating material 12, the rust preventive impregnated in the core material 11 is always leached or vaporized from the outer peripheral surface of the core material 11 and released. Although a large amount of rust preventive is wasted, a large amount of rust preventive is supplied to the stick finger member 2, so that a higher rust preventive effect can be obtained. Further, since there is no covering material 12 and tongue-shaped piece 13, the cost can be reduced by the material cost and the manufacturing cost.

The modified example shown in FIG. 4 (b) is a cross-section that is located substantially at the center of the cross section of the core material 11 in the rust preventive member 3 and is formed as a long hole along the longitudinal direction of the core material 11. A circular storage hole H is provided. The storage hole H stores a volatile liquid, gel, or solid rust preventive agent K. Both ends of the storage hole H are filled with the stored rust preventive K
Is sealed with a sealing material (not shown) so as not to leak. In addition, other configurations (covering material 12, tongue-shaped piece 1)
3. The ventilation holes A) are the same as in the first embodiment. In this modified example, when a liquid or gel-like rust preventive K is used, if the rust preventive K is injected into the storage hole H, the entire rust preventive K can be impregnated quickly. When the solid rust preventive K is used, if the rust preventive K is stored in the storage hole H, the rust preventive K is formed inside the core material 11.
Can be prevented from unevenly disturbing the free deformation of the core material 11.

The modification shown in FIG. 4 (c) is different from the modification shown in FIG. 4 (b) in that a communication hole P connecting the storage hole H and the ventilation hole A is formed in the core material 11. In this modification, a gel or solid rust preventive material K is provided in the storage hole H.
Is stored, the vaporized rust preventive material K can be efficiently guided to the ventilation hole A through the communication hole P. The communication hole P
May not be provided in all the ventilation holes A, and a plurality of communication holes P may be provided in one ventilation hole A.

The modified example shown in FIG. 5A is a modification of the modified example shown in FIG. 4C, in which the core material 11 made of a foamed material having single cells is used instead of the core material 11 made of a foamed material having open cells. 11a. In this variation,
Since the core material 11a has no air permeability, a communication hole P for guiding the vaporized rust preventive material K from the storage hole H to the ventilation hole A is an essential requirement.

The modification shown in FIG. 5B is obtained by removing the covering material 12 from the modification shown in FIG.
In this modification, the core material 11a is airtight, so that the vaporized rust preventive material K is unnecessarily discharged without the covering material 12, as in the case where the covering material 12 is provided. And the rust preventive material K can be used effectively.

A modification shown in FIG. 5C is a modification of the first embodiment, in which a rust-preventing member 3 is used instead of a volatile liquid.
A rust preventive member 3a made of a sheet material containing a gel or solid rust preventive is attached to the inside of each of the portions 4 to 6 of the stick finger member 2. In addition, rust prevention member 3
Examples of the sheet material for forming a include paper, woven fabric, nonwoven fabric, synthetic resin film, and the like, but any material may be used as long as it can be deformed by including a rust inhibitor. . Also in this modified example, the rust preventive released and vaporized or vaporized from the rust preventive member 3a spreads on the surface of each of the portions 4 to 6 of the stick finger member 2 by the surface tension, and the entire surface of the stick finger member 2 A rust preventive film is formed on the surface.

In the modification shown in FIG. 6, the stick finger member 2 in the first embodiment is replaced by a stick finger member 31 having a different shape. The stick finger member 31 includes a rectangular flat base 32.
And a plurality of protruding pieces 34 provided at regular intervals along a side edge 33a of the arch 33, and an arch part 33 having an arch shape continuous with the base part 32. 34, and is formed by a thin plate spring composed of a base portion 32 and an arch portion 33. Each of the portions 32 to 34 of the stick finger member 31, like the stick finger member 2, is integrally formed by pressing a thin plate material having conductivity and elasticity.

The rust preventive member 3 has the same configuration as the rust preventive member 3 of the first embodiment shown in FIG. 1, and is irremovably attached to the inside of the arch portion 33 of the stick finger member 31. When the base 32 of the stick finger member 31 configured as described above is conductively fixed to the main body of the conductive housing and the lid of the conductive housing is closed, the arch 33 is formed between the main body and the lid. The arch portion 33 is pressed against the lid by the spring force of the thin plate spring, and the main body and the lid are electrically connected to each other via the stick finger member 31. Further, when the arch portion 33 is pressed between the main body portion and the lid portion of the conductive housing, the rust prevention member 3 is moved to the arch portion 33.
The core 11 is deformed by being compressed between the body and the main body. Therefore, the same operation and effect as those of the first embodiment can be obtained.

The modification shown in FIG. 6 and FIGS.
May be used in combination. The example shown in FIG.
This is a combination of the modification shown in FIG. 6 and the modification shown in FIG. 5C, in which a rust preventive member 3a made of a sheet material is adhered inside the arch portion 33.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a perspective view of the electromagnetic wave shielding gasket 51 of the present embodiment. The electromagnetic wave shielding gasket 51 includes a stick finger member 52 as a spring member and a rust prevention member 53.

The stick finger member 52 has a substantially cylindrical base portion 5 provided with a slit 54 along the longitudinal direction.
5, a plurality of protruding pieces 56 a erected at regular intervals along one edge of the slit 54, and a plurality of protruding pieces erected at regular intervals along the other edge of the slit 54. 5
6b, and each protruding piece 56a, 56b is formed by a thin plate spring formed at an acute angle θ.

Each of the parts 54 to 56a and 56b of the stick finger member 52 is formed integrally by pressing a conductive and elastic thin plate material, similarly to the stick finger member 2 of the first embodiment. The rust prevention member 53 includes a connection member 61 and a sealing member 62. The connection member 61 includes a substantially cylindrical tip portion 61a and a flange 61b protruding along the longitudinal direction of the tip portion 61a. The base 55 of the stick finger member 52 is fitted to the distal end 61a of the connecting member 61 so as not to be detached. A sealing member 62 is connected to a distal end portion of the flange 61b of the connection member 61. The sealing member 62 includes three flanges 62 erected on both sides of the flange 61b along the longitudinal direction.
a, 62b. The flange 62b of the sealing member 62 has a conical tip portion 63a and a columnar leg portion 6a.
3b, a plurality of snap members 63 are provided upright.

The parts 61 to 63 of the rust preventive member 53 are
Like the core material 11 of the first embodiment, it is integrally formed of a foamed material having open cells containing a volatile, liquid, gel, or solid rust inhibitor. Next, a method of using the electromagnetic shielding gasket 51 configured as described above will be described with reference to FIG.

First, each snap member 63 is inserted into a plurality of through holes 71b opened in the main body 71a of the conductive housing.
Is inserted. Here, the diameter of the through hole 71b is set slightly larger than the diameter of the leg 63b of the snap member 63 and slightly smaller than the diameter of the bottom surface of the conical tip 63a. The thickness of the main body 71 a (the depth of the through hole 71 b) is set to be equal to the length of the leg 63 b of the snap member 63. Therefore, when the distal end portion 63a of each snap member 63 is inserted into each through hole 71b, the bottom edge of the distal end portion 63a is locked irremovably to the peripheral edge of each through hole 71b. As a result, the main body 71 of the conductive housing is connected via the snap members 63 locked in the through holes 71b.
The electromagnetic shielding gasket 51 is attached and fixed to a.

Next, when the lid 71b of the conductive housing is closed in the direction of the arrow X, the protruding pieces 56a and 56b are pressed between the main body 71a and the lid 71b, and the protruding pieces 56a and 56b are pressed by the spring force of the thin plate spring. The piece 56a presses the lid 21b side and the protruding piece 56b presses the main body 71b side, and the main body 71a and the lid 71b are connected to each other via the stick finger member 52 in a conductive manner. Here, since the interval between the protruding pieces 56a and 56b is formed to be narrow, the main body 71 of the conductive housing is formed.
The gap between a and the lid 71b is almost completely filled by the protruding pieces 56a and 56b, and it is possible to shield the electromagnetic waves that pass through the gap.

In this state, the main body 7 of the conductive housing
The sealing member 62 is pressed between 1a and the lid 71b,
The sealing member 62 is deformed to close the gap between the main body portion 71a and the lid portion 71b to seal. Here, since the sealing member 62 is composed of the flanges 62a and 62b, the flanges 62a and 62b are freely deformed and adhere to the surface shapes of the main body 71a and the lid 71b of the conductive housing. Therefore, even when the surface shapes of the main body portion 71a and the lid portion 71b of the conductive housing are not smooth, the gap can be reliably sealed, and high airtightness of the conductive housing can be obtained.

The rust preventive, which has been leached or vaporized and released from the rust preventive member 53,
2 and spread on the surface of each portion 55, 56a, 56b of the stick finger member 52 by surface tension,
A coating of a rust inhibitor is formed on the entire surface of the stick finger member 52. Therefore, the same operation and effect as those of the first embodiment can be obtained.

The sealing member 62 is attached to the stick finger member 52 via the connecting member 61, and constitutes the electromagnetic wave shielding gasket 51 as one component. Therefore, it is not necessary for the installer of the installation of the electromagnetic shielding gasket 51 to store and manage the sealing member 62 as a separate component from the electromagnetic shielding gasket 1, and it is not necessary to perform the operation of attaching only the sealing member 62. Costs can be reduced.

The present invention is not limited to the above embodiments, but may be modified as follows. Even in such a case, the same operation and effect as those of the above embodiments can be obtained. (1) When attaching the electromagnetic shielding gasket 1 to the main body portion 21a of the conductive housing, the gasket 1 is not fixed with the double-sided adhesive tape 7 as in the above embodiment, but is fixed with an adhesive. May be fixed by screws.

When attaching the electromagnetic shielding gasket 51 to the main body 71a of the conductive housing, instead of using the snap member 63 as in the above embodiment,
The members 61 and 63 and the main body 71a may be fixed with a double-sided adhesive tape or an adhesive, or the members 61 and 63 and the main body 71a may be screwed and fixed with screws.

(2) The cross-sectional shape of the core members 11 and 11a is not limited to a substantially semicircular shape, but may be any shape such as a polygon, a circle, and an ellipse. (3) The shape of the cut for forming the tongue-shaped piece 13 in the covering material 12 is not limited to the U-shape, and at least the core materials 11
Any shape may be used as long as the air hole A is opened when a is deformed. Alternatively, the tongue 13 may be omitted, and the ventilation hole A may be always open.

(4) The number of storage holes H is not limited to one, but may be two or more. In addition, the storage holes H are provided with the core members 11 and 11a.
May be provided at a position deviated from the center. When a plurality of storage holes H are provided, the storage holes H may be provided at asymmetric positions in the core members 11 and 11a, or the sizes of the storage holes H may be different from each other. Further, the sectional shape of the storage hole H is not limited to a circle, and may be any shape such as a polygon, a circle, and an ellipse.

(5) As shown in FIG. 10, a number of small holes S penetrating the front and back surfaces of the stick finger member 2 are formed. In this case, the rust inhibitor attached to the inside of the stick finger member 2 spreads to the front side of the stick finger member 2 through each pore S, so that the entire surface of the stick finger member 2 is coated with the rust inhibitor. Easy to form.
The diameter of the pores S is preferably as small as possible as long as the rust preventive agent released from the rust preventive member 3 and adhered to the inside of the stick finger member 2 can penetrate. In addition, if the diameter of the pores S is reduced, the electromagnetic waves that pass through the pores S can be sufficiently shielded, so that the electromagnetic wave shielding effect of the electromagnetic wave shielding gasket 1 is not hindered. .

It should be noted that the same effect can be obtained for the stick finger member 31 shown in FIGS. 6 and 7 and the stick finger member 52 shown in FIG. 8 by forming the same pore S as shown in FIG. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view of a gasket for an electromagnetic wave shield according to a first embodiment.

FIG. 2 is an explanatory diagram for describing a method of using the electromagnetic wave shielding gasket of the first embodiment.

FIG. 3 is an explanatory view for explaining a method of using the electromagnetic wave shielding gasket of the first embodiment.

FIG. 4 is a sectional view showing a modified example of the electromagnetic wave shielding gasket of the first embodiment.

FIG. 5 is a sectional view showing a modification of the electromagnetic shielding gasket of the first embodiment.

FIG. 6 is a sectional view showing a modification of the electromagnetic shielding gasket of the first embodiment.

FIG. 7 is a sectional view showing a modified example of the electromagnetic wave shielding gasket of the first embodiment.

FIG. 8 is a perspective view of a gasket for an electromagnetic wave shield according to a second embodiment.

FIG. 9 is an explanatory diagram for describing a method of using the electromagnetic wave shielding gasket of the second embodiment.

FIG. 10 is a perspective view showing a modification of the electromagnetic shielding gasket of the first embodiment.

[Explanation of symbols]

2, 31, 52 ... stick finger member 3, 3
a, 53: Rust prevention member 11, 11a: Core material 12: Coating material 61: Connection member 62: Sealing member A: Vent hole H: Housing part P ...
Communication hole K: Rust inhibitor G: Vaporization rust inhibitor S: Pore

Claims (12)

[Claims] 1. A gasket for electromagnetic wave shielding, comprising: a spring member having at least a portion formed of metal and having a spring property; and a rust preventive member for supplying a rust preventive to the spring member. . 2. The electromagnetic wave shielding gasket according to claim 1, wherein the spring member is formed of a thin plate, and a plurality of pores penetrating the front and back surfaces of the thin plate. Gasket for shielding. 3. The gasket for electromagnetic wave shielding according to claim 1, wherein the rust preventive member includes a sheet material containing a rust preventive agent, and the sheet material contacts at least a part of the spring member. A gasket for shielding electromagnetic waves, characterized in that: 4. The gasket for electromagnetic wave shielding according to claim 1, wherein the rust-preventive member is made of a core material made of an elastic material containing a rust-preventive agent. A coated rust-preventing agent, and a volatile rust-preventing agent is held inside the coating-covered material, and at least a part of the coating material can release the vaporized rust-preventing agent to the outside. A gasket for electromagnetic wave shielding, characterized by being constituted. 5. The electromagnetic wave shielding gasket according to claim 4, wherein the covering material has airtightness and has a ventilation hole through which the vaporized rust inhibitor passes. Gasket for shielding. 6. The gasket for an electromagnetic wave shield according to claim 5, wherein the ventilation hole is formed in a slit shape so as to be opened by deformation of the rust preventive member. 7. The gasket for an electromagnetic wave shield according to claim 4, wherein the core member is made of a foam material having open cells. 8. The electromagnetic wave shielding gasket according to claim 7, wherein at least one storage portion for injecting or storing the rust inhibitor is provided in the core material. Gasket. 9. The gasket for an electromagnetic wave shield according to claim 8, wherein a communication hole is provided in the core material for communicating an outer space of the core material with the storage portion. . 10. The electromagnetic wave shielding gasket according to claim 4, wherein the core material is made of a foamed material having a single cell, and the core material is filled with the rust inhibitor. A gasket for an electromagnetic wave shield, comprising: at least one storage portion for storing, and a communication hole for communicating an external space of the core material with the storage portion. 11. The electromagnetic wave shielding gasket according to claim 1, wherein the spring member is disposed in a gap between the conductive members and shields an electromagnetic wave that is going to pass through the gap. A gasket for electromagnetic wave shielding, wherein a sealing member for closing and sealing is connected to the rust prevention member. 12. The gasket for an electromagnetic wave shield according to claim 11, wherein the sealing member is integrally formed of the same material as the rust prevention member.