KR20210145105A - Resilient Gasket - Google Patents

Abstract

Disclosed is an elastic gasket that can block the inflow of gas or water while implementing electrical connection or electromagnetic wave shielding. The gasket includes an elastic core, and a metal member that is continuously wound at a regular interval around the outer surface of the core and bonded by interposing an adhesive layer. When the metal member is pressed by an electrically conductive object and buried from the outer surface of the core, a core portion corresponding to the interval is in close contact with the object to prevent a gap between the object and the outer surface of the core.

Description

Resilient Gasket {Resilient Gasket}

The present invention relates to an elastic gasket interposed between opposing electrically conductive objects, and more particularly, to an elastic gasket that simultaneously implements mechanical sealing and electromagnetic wave shielding.

In general, an elastic gasket interposed between opposing objects is used for the purpose of mechanically sealing gas, water, dust or noise, or shielding electromagnetic waves by connecting electricity to each other.

An elastic gasket used to effectively seal gas, water, dust or noise, etc. should be soft and have good elastic restoring force so that the pressing force is small, and the elastic gasket intended to shield electromagnetic waves by connecting electricity is also normally pressed. It should be soft so that the force is small, the elastic restoring force should be good, and the electrical resistance should be low. In addition to these basic properties, it is desirable to be economically supplied in continuous rolls, and flexibility is required to bend well at various angles.

According to the conventional patent No. 1018735 by the inventor of the present invention, an elastic rubber having a certain volume, an elastic rubber coating layer attached to surround the entire outer surface of the elastic rubber, and an outer surface of the elastic rubber coating layer are obliquely lined with a certain insulating interval An elastic electrical contact terminal comprising a flexible metal member which is continuously wound around to adhere to the elastic rubber coating layer, is soldered by the metal member, and has elasticity by the elastic rubber and the elastic rubber coating layer is proposed.

According to this patent, the metal member protruding to the outside provides reliable electrical contact with the opposing object and at the same time is electrically connected to the back surface so that the opposing object can be electrically connected to each other by soldering, and the metal member is not formed The part is easy to provide reliable elasticity, resilience and flexibility even against repeated compression provided from the outside.

When the metal member contacts the object, a gap may be formed between the elastic rubber coating layer adhered to the outer surface of the elastic rubber and the object. For example, when the metal members are wound at too close intervals in order to improve the electromagnetic wave shielding effect or to lower the electrical resistance between the objects, or when the thickness of the metal members is relatively thick and wide, only the opposing metal members are the object may be in contact with and the coating layer may not be in contact with the object.

As a result, when the gasket and the object are not sufficiently mechanically sealed and used in an environment where it is necessary to prevent the ingress of gas, water, or dust, the inflow of gas, water, or dust through an unsealed gap (gap) There is a problem that this can be.

In addition, when the winding interval of the metal member is narrow, productivity is reduced, and when plating for only soldering is additionally required, manufacturing cost is increased.

Accordingly, it is an object of the present invention to economically provide an elastic gasket that simultaneously implements mechanical sealing and electromagnetic wave shielding.

Another object of the present invention is to provide an elastic gasket that facilitates mechanical sealing and improves the electromagnetic wave shielding effect.

The above object is an elastic gasket used interposed between opposing electrically conductive objects, comprising an elastic core and a metal member that is continuously wound at regular intervals on the outer surface of the core and adhered through an adhesive layer, the gasket This is achieved by an elastic gasket, characterized in that when pressed by the object, the metal member and the core portion corresponding to the gap contact the object.

Preferably, the metal member may be a metal wire or a metal strip, or may be composed of a polymer film and a metal layer laminated only on the polymer film.

Preferably, the adhesive layer may be formed only between the metal member and the outer surface of the core, or may be formed on the entire outer surface of the core.

The above object is an elastic gasket interposed between opposing electrically conductive objects, an elastic core, and a metal member that is continuously wound at regular intervals on the outer surface of the core and adhered through an adhesive layer, the metal When the member is pressed by an electrically conductive object and pressed from the outer surface of the core, the core portion corresponding to the gap is in close contact with the object to prevent a gap from being formed between the object and the outer surface of the core. achieved by

Preferably, the elastic gasket can shield the electromagnetic wave while mechanically sealing the object.

Preferably, the auxiliary metal member may be wound along the gap between the metal members, and the height and the width of the auxiliary metal member may be equal to or higher than the height of the metal member, respectively, and may be narrower than the width of the metal member.

According to the elastic gasket of the present invention, when pressed between the electrically conductive objects, at least a portion between the metal members wound on the outer surface of the core contacts the object, thereby eliminating the mechanical gap between the object and the gasket.

As a result, it is possible to block gas, water or dust flowing into the gap between the object and the gasket while implementing the electrical connection between the electrically conductive objects or shielding electromagnetic waves through the same.

In addition, the winding interval of the metal member is relatively wide, so that the productivity of the winding process is good, and the manufacturing cost is reduced by using the adhesive layer only in the necessary part.

In addition, by simultaneously applying a metal wire and a metal strip as a metal member, it is possible to facilitate mechanical sealing, low electrical resistance, good electromagnetic wave shielding effect, and improve productivity.

1 shows a gasket according to an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view taken along line 2-2 of FIG. 1, and FIG. 2(a) shows a modified example.
3 shows various shapes of the metal member.
4 is an enlarged view showing the use of the gasket of the present invention.
5 shows a gasket according to another embodiment of the present invention.

It should be noted that the technical terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. In addition, the technical terms used in the present invention should be interpreted as meanings generally understood by those of ordinary skill in the art to which the present invention belongs, unless otherwise defined in particular in the present invention, and excessively comprehensive It should not be construed in the meaning of a human being or in an excessively reduced meaning.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a gasket according to an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view taken along line 2-2 of FIG. 1 .

The gasket 100 is made of an elastic core 110 and a metal member 130 which is continuously wound diagonally at regular intervals on the outer surface of the core 110 and adhered with an adhesive layer 120 interposed therebetween.

When the gasket 100 is interposed between the electrically conductive objects and pressed, the portion where the metal member 130 wound around the outer surface of the core 110 is in close contact with the object is in close contact with the object, so that the gap between the object and the gasket 100 ( gap) can be eliminated.

As a result, it is possible to block gas or water flowing into the gap between the object and the gasket while implementing the electrical connection between the electrically conductive objects or shielding electromagnetic waves through the same.

Here, the dust and waterproof rating according to IEC 60529 between the opposing objects may be IP54 or higher.

By interposing the gasket 100 between opposing objects, the electrical resistance between the objects may be 1 ohm or less due to the metal member 130 .

The gasket 100 may optionally be fixed by adhering to the object by interposing an electrically conductive double-sided adhesive tape on the lower surface thereof.

<Core 110>

The core 110 has elasticity, and may be a tube in which a through hole is formed in the longitudinal direction, a rod shape in which a through hole is not formed, or a foamed sponge, and may have a circular or semicircular cross-section. .

The core 110 may be, for example, silicone rubber, urethane rubber, or synthetic rubber having elasticity.

The core 110 is manufactured by an extrusion process and provided as a continuous reel in the longitudinal direction.

<Adhesive layer 120>

The adhesive layer 120 is positioned between the core 110 and the metal member 130 to reliably bond the core 110 and the metal member 130 .

The adhesive layer 120 serves to prevent the metal member 130 from detaching from the core 110 even when the gasket 100 is pressed by an external force or partially deformed, and is not melted again by heat after curing. .

The adhesive layer 120 has elasticity to be flexible and elastic in several directions, and the thickness of the adhesive layer 120 is much thinner than the thickness of the core 110 and is approximately 0.005 mm to 0.1 mm.

The adhesive layer 120 may be formed by applying a liquid silicone rubber and then curing it.

The adhesive layer 120 may be formed entirely on the outer surface of the core 110 , or may be formed only on a portion of the metal member 130 opposite to the core 110 .

When the adhesive layer 120 is formed only on the lower portion of the metal member 130 opposite to the core 110 , the gasket 100 can easily maintain the flexibility and elasticity of the core 110 itself, and the adhesive layer 120 . ) has the advantage of being able to save material.

When the adhesive layer 120 is formed on the entire core 110 , the adhesive layer 120 exposed to the outside by the adhesive layer 120 exposed to the outside can more easily contact the opposing object. There is this.

<Metal member 130>

As the metal member 130 , a metal wire or a metal strip may be used.

The dimensions of the metal member 130 including the thickness and width of the metal wire or metal strip, the spacing between the metal members 130 , and the hardness of the core 110 are core portions corresponding to the spacing between the metal members 130 . (111), or whether the adhesive layer part can contact the object is determined by comprehensive consideration.

For example, the height of the metal member 130 is lower than the width of the metal member 130 , the distance L between the metal members 130 may be twice or more than the width W of the metal member 130 , and the hardness of the core 110 is Shore A may be 40 to 70.

The metal member 130 is wound around the outer surface of the core 110 to be adhered, and has a constant inclination in the longitudinal direction with respect to the width direction of the core 110 and is wound at predetermined intervals. That is, it is wound in a spiral.

2( a ) shows a modified example, in which a metal wire-shaped auxiliary metal member 230 having a relatively higher height and a smaller width than a metal strip is inserted into a strip-shaped metal member ( 130) and may be wound with a certain inclination at the same interval.

In this case, the wide metal strip is pressed relatively little and the high auxiliary metal member 230 is pressed relatively much, so that the core part 111 is easy to contact the object, and also the object and electricity by the auxiliary metal member 230 are pressed. There is an advantage that the electromagnetic wave shielding is improved because the resistance is less connected.

In this embodiment, in order to easily provide mechanical sealing, the metal wire is circular, and the diameter is preferably 1/4 or less than the width of the metal strip, but is not limited thereto.

In this case, since the winding interval of the metal wire, ie, the pitch, is the same as the pitch of the metal strip, as a result, the speed of the winding process is increased, thereby improving productivity.

3 shows various shapes of the metal member 130 .

As shown in Fig. 3(a), the metal wire may be a circular wire or a polarized wire, for example, the circular wire has a diameter of 0.03mm-0.1mm, and the polarized wire has a height of 0.02mm-0.06mm and It can have a width of 0.05mm-0.4mm.

Preferably, the polarized wire may be a circular wire rolled into a substantially rectangular shape.

In addition, as shown in FIG. 3(b), the metal strip may have a height of 0.015-0.03 mm and a width of 0.5-2 mm. A metal layer 132 is formed on one side with the polymer film 131 as a base. It may be laminated, or may be made of an alloy of copper or iron having relatively high strength, but is not limited thereto.

Here, the metal layer 132 may be a copper foil or a copper plating layer, and tin, gold, etc. may be plated on the copper foil or the copper plating layer if necessary.

As the polymer film 131 , a polymer film such as a polyimide (PI) film or polyester (PET) may be used, and the thickness may be determined in consideration of flexibility and mechanical strength.

4 shows an enlarged state of use of the gasket 100 of the present invention.

According to the present invention, according to the height H and width W of the metal member 130 , the separation distance L (pitch) between the metal members 130 , and the hardness of the core 110 , the gasket 100 is pressed against the opposing object. The depth at which the metal member 130 is buried in the core 110 may be determined.

Here, the depth at which the metal member 130 is buried in the core 110 is, as a result, the size of the core portion 111 at the interval of the metal member 130 wound around the outer surface of the core 110 to determine the size of the adhesion to the object. important because

Referring to FIG. 4 , the metal member 130 is pressed by the electrically conductive object 10 and buried from the outer surface of the core 110 . In the best state in which the metal member 130 is completely buried in the core 110 , the metal member Most of the core portion 111 of the interval of 130 is in close contact with the object (10).

Therefore, the gap between the object 10 and the gasket 100 can be minimized, so that an electrical connection between the objects or electromagnetic wave shielding through this can be realized, and gas or water flowing into the gap between the object and the gasket can be blocked.

Here, the opposing object 10 may be a housing having a predetermined shape having electrical conductivity, for example, an instrument case, but may be a bar-shaped strip having a predetermined length.

5 shows a gasket according to another embodiment of the present invention.

In this embodiment, the adhesive layer 120 is formed on the entire outer surface of the core 110 so that the portion not wound by the metal member 130 is exposed to the outside.

The metal member 130 is a metal strip shown in FIG. 3B , and is configured by laminating a metal layer 132 on one side of the polymer film 131 as a base, and the polymer film 131 is an adhesive layer 120 . ) is attached to the core 110 through the.

The opposite object of the present invention may be an enclosure having a constant shape, for example, a case or a strip shape having a constant length.

In the present invention, when the object 10 in contact with the metal member 130 does not have electrical conductivity and the metal wire is a heating wire that provides heat by electricity, the gasket 100 may be applied as a heating gasket. .

Although the above description has been focused on the embodiments of the present invention, it goes without saying that various changes may be made at the level of those skilled in the art. Accordingly, the scope of the present invention cannot be construed as being limited to the above-described embodiments, and should be construed by the claims described below.

10: object
100: gasket
110: core
120: adhesive layer
130: metal member

Claims (7)

An elastic gasket used between opposing electrically conductive objects,
Consists of an elastic core, and a metal member that is continuously wound at regular intervals on the outer surface of the core and adhered through an adhesive layer,
An elastic gasket, characterized in that when the gasket is pressed by the object, the metal member and a core portion corresponding to the gap contact the object. In claim 1,
The metal member,
a metal wire or a metal strip,
An elastic gasket comprising a polymer film and a metal layer laminated only on the polymer film. In claim 1,
The adhesive layer is formed only between the metal member and the outer surface of the core, or is formed on the entire outer surface of the core. An elastic gasket used between opposing electrically conductive objects,
Consists of an elastic core, and a metal member that is continuously wound at regular intervals on the outer surface of the core and adhered through an adhesive layer,
When the metal member is pressed by the electrically conductive object and pressed from the outer surface of the core, the core portion corresponding to the gap is in close contact with the object so that a gap is not formed between the object and the outer surface of the core. Elasticity, characterized in that gasket. In claim 4,
wherein the elastic gasket shields electromagnetic waves while mechanically sealing the object. In claim 1 or 4,
An elastic gasket, characterized in that the auxiliary metal member is wound along the gap between the metal members. In claim 6,
A height and a width of the auxiliary metal member are respectively equal to or greater than a height of the metal member and are narrower than a width of the metal member.

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