KR102212351B1 - Elastic Electric Contact Terminal - Google Patents

Abstract

Disclosed is an elastic electrical contact terminal with improved adhesion between a body and an adhesive tape. Corresponding to the portion to which the adhesive tape adheres, the metal plating layer is removed so that the adhesive tape contacts and adheres to the copper foil, or the gold layer is removed and the adhesive tape contacts and adheres to the nickel layer.

Description

Elastic Electric Contact Terminal {Elastic Electric Contact Terminal}

The present invention relates to an elastic electrical contact terminal, and more particularly, to an elastic electrical contact terminal with improved adhesion between a body and an adhesive tape. In addition, it relates to an elastic electrical contact terminal that does not easily fall off the adhesive tape by external force.

In a state where the electrically conductive objects face each other, elastic electrical contact terminals are used to electrically connect these objects with elasticity.

The elastic electrical contact terminal may be used for electrical connection, for example, for electric grounding, electric contact, or EMI gasket.

In order to be used for such a purpose, it is preferable that the elastic electrical contact terminal generally has good electrical conductivity, excellent elastic resilience, resistance to corrosion, and excellent environmental resistance.

In general, gold (Au) can be used as a material having good electrical conductivity, poor corrosion, and excellent environmental resistance. However, since gold is expensive and has poor elasticity, it is possible to manufacture an elastic battery contact terminal by plating or evaporating gold in a thin thickness on a copper alloy with good elasticity such as phosphor bronze or on a conductive fiber plated with copper.

In general, in order to mount the elastic electrical contact terminal to the object, reflow soldering with solder cream may be used, or an electrically conductive adhesive or adhesive tape may be used.

In Korean Patent Application Publication No. 2017-0108770 by the present applicant, an elastic core, a polymer film bonded by wrapping the core through an adhesive layer, a solderable metal layer bonded by wrapping the polymer film, and an electrically conductive double-sided bonded to the lower surface of the metal layer. An electrical contact terminal including an adhesive tape is disclosed.

Here, the metal layer is usually made of a copper foil and a gold layer formed thereon, but there is a disadvantage that the adhesive tape does not adhere well to the gold layer of the outermost layer.

As a result, if the electrical contact terminal is adhered to the object through the double-sided adhesive tape and an external force is applied in the lateral direction of the electrical contact terminal, the adhesive force between the gold layer and the adhesive tape is weak. The terminal itself has a problem that it is easily separated from the object.

In particular, when the hardness of the core is high, it is difficult for the core to absorb the external force applied from the side, and as a result, a large amount of the external force is transmitted to the adhesive tape, so there is a disadvantage that the adhesive tape is more easily separated from the gold layer by the external force.

Accordingly, an object of the present invention is to provide an elastic electrical contact terminal with improved adhesion between a body and an adhesive tape.

Another object of the present invention is to provide an elastic electrical contact terminal having a counter force that is easy to absorb an external force against an external force in the lateral direction.

The object of the above is an elastic electrical contact terminal interposed between opposing objects to electrically connect the object, comprising a body and an adhesive tape adhered to a lower surface of the body, the body comprising: a foam elastic core; A copper foil wrapped around and adhered to the core through an adhesive; And a metal layer formed on the copper foil, wherein the metal layer is composed of a nickel layer and a gold layer sequentially formed on the copper foil, and corresponding to a portion to which the adhesive tape adheres, the gold layer is removed so that the adhesive tape is It is achieved by an elastic electrical contact terminal, characterized in that adhesion by contacting the nickel layer or by removing the nickel layer and the gold layer so that the adhesive tape contacts and adheres to the copper foil.

Preferably, a polymer film is adhered to the copper foil between the copper foil and the adhesive.

Preferably, the metal layer is formed by plating.

Optionally, an external force absorption space may be formed by removing the copper foil and the metal layer to have a certain width and extend in the longitudinal direction from the upper surface of the electrical contact terminal, or by removing the film, the copper foil and the metal layer. .

Preferably, the external force applied to the contact terminal is absorbed by moving the core asymmetrically in the external force absorption space.

Preferably, an elastic rubber is coated on at least one of the copper foil between the copper foil and the adhesive or the film between the film and the adhesive.

Preferably, at least a portion of the sidewall of the core does not adhere to the elastic rubber, and at least a portion of the sidewall of the core does not adhere to the copper foil or the film.

Preferably, a reinforcing film including PET is adhered to the upper or lower surface of the core or both by self-adhesive or through an adhesive.

According to the present invention, since the adhesive tape is mainly adhered to the copper foil or nickel layer of the body, the adhesive strength is better than that of the gold layer, so that the adhesive tape does not easily fall off the body. As a result, after being adhered to the object through the adhesive tape, even if an external force is applied to the side, the main body is less likely to be separated from or dropped from the adhesive tape.

In addition, since the gold layer is asymmetrically exposed on the lower surface of the main body, an electric non-conductive adhesive tape with good adhesion and low cost is applied thereto, so that the gold layer with good adhesion and very excellent electrical conductivity is directly electrically connected to the object. .

In addition, by forming an external force absorption space on the upper surface of the contact terminal, when an external force is applied from the upper side of the electrical contact terminal, the external force absorption space disperses, absorbs, or absorbs the external force and applies it to the adhesive tape attached to the lower surface of the main body. It can reduce the losing force, and as a result, the electrical contact terminal does not easily fall off the object.

1 shows an electrical contact terminal according to an embodiment of the present invention.
2 shows an electrical contact terminal according to another embodiment of the present invention.
3 shows an electrical contact terminal according to a modified example of the present invention.
4 shows an electrical contact terminal according to another embodiment of the present invention.
5 shows an electrical contact terminal 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 generally understood by those of ordinary skill in the technical field to which the present invention belongs, unless otherwise defined in the present invention, and is excessively comprehensive. It should not be construed as a human meaning or an excessively reduced meaning.

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

1 shows an electrical contact terminal according to an embodiment of the present invention.

The elastic electrical contact terminal is made of a body 100 and an adhesive tape 200 laminated on the lower surface of the body 100, and the adhesive tape 200 is a copper foil 130 or a nickel layer 142 of the body 100. It mainly adheres to.

Here, the meaning of'mainly' means that most of the adhesive surface of the adhesive tape 200 adheres to the copper foil 130 or the nickel layer 142, but does not exclude some adhesion to other parts.

The body 100 is composed of a foamed elastic core (Core: 110), a copper foil 130 that wraps and bonds the core 110 through an adhesive, and a metal layer 140 formed on the copper foil 130.

According to this structure, since the adhesive tape 200 is mainly adhered to the copper foil 130 or the nickel layer 142 of the body 100, the adhesive strength is better than that of the gold layer, so that the adhesive tape 200 is applied to the body 100 ) Does not fall off well. As a result, after being adhered to the object through the adhesive tape 200, even if an external force is applied from the side surface, the main body 100 is separated from the adhesive tape 200 and falls off less.

In addition, when the core 110 is foamed in an open cell structure, it has good elasticity and elasticity recovery rate and can be easily pressed even with a small force, but is not limited thereto and may be easily deformed by an external force, but a close cell ).

In addition, since the electrical contact terminal is mounted on the object by the adhesive tape 200, it does not require heat resistance to withstand the soldering temperature.

Hereinafter, each component of the elastic electrical contact terminal will be described in detail.

The upper and lower surfaces of the elastic core 110 positioned therein form a flat surface, and the vertical cross section is covered with copper foil 130 and both sides are rounded to form a substantially rectangular shape, but the present invention is not limited thereto.

The dimensions of the core 110 are not particularly limited, but for example, the width is 1.5 mm to 15 mm, the length is 1 mm to 20 mm, the thickness is 0.4 mm to 5 mm, and the hardness may be about Shore A 20 to 80.

When the hardness of the core 110 is high, it is preferable to use an adhesive tape 200 having a high adhesive strength in a large area.

Here, the core 110 may be a foamed silicone rubber elastic body or a urethane rubber elastic body. In the case of using the foamed elastic rubber having an open cell structure as the core 110, the strength is lowered as a result, and it is easy to absorb the force applied from the external force from the core itself.

Optionally, a reinforcing film such as PET may be adhered to the upper or lower surface of the core 110 or both by self-adhesive or through an adhesive. According to this structure, it is possible to minimize the deformation of the shape of the core 110 by the force when the copper foil 130 wraps the core 110.

As an adhesive for reliably elastically bonding the core 110 and the copper foil 130 between the core 110 and the copper foil 130, for example, acrylic resin, urethane rubber, or silicone rubber adhesive may be used, and from 10 microns to It can have a thickness of about 50 microns.

The adhesive may be formed by curing a liquid adhesive, or a solid hot melt film may be melted by heat and then adhered and formed into a solid state by cooling.

delete

For example, between the copper foil 130 and the adhesive, an elastic rubber such as urethane rubber or silicone rubber is thinly coated to prevent the copper foil 130 from being wrinkled when an external force is applied to the body 100 in the vertical direction. have.

The copper foil 130 may have a thickness of, for example, 5 to 25 microns, and a metal layer 140 is formed on the copper foil 130 to improve electrical conductivity and prevent corrosion.

The copper foil 130 may be an electrolytic copper foil or a rolled copper foil, but an electrolytic copper foil having low mechanical strength and easy adhesion is preferred.

The metal layer 140 includes a nickel layer 142 and a gold layer 144, and may be formed to have a thickness of about 0.1 micron to 0.8 micron and 0.01 micron to 0.08 micron, respectively. Here, the nickel layer 142 and the gold layer 144 may be formed by plating.

Looking at the enlarged circle A of FIG. 1, the metal layer 140 is all etched away corresponding to the portion to which the adhesive tape 200 adheres, so that the adhesive tape 200 directly contacts and adheres to the copper foil 130.

In addition, looking at the enlarged circle B, the gold layer 144 of the metal layer 140 is etched away and the nickel layer 142 remains, corresponding to the portion to which the adhesive tape 200 adheres, so that the adhesive tape 200 is nickel It adheres in direct contact with the layer 142.

In terms of material properties, since both copper and nickel have better adhesive strength with the adhesive tape 200 than the gold layer 144, the adhesive tape 200 adheres well to both. As a result, the main body 100 is not easily separated from the adhesive tape 200 by the adhesive force of the adhesive tape 200.

The adhesive tape 200 may be electrically conductive or electrically non-conductive, and when the core 110 is urethane rubber, the adhesive tape 200 is preferably an acrylic adhesive tape, and when the core 110 is silicone rubber, a silicone adhesive tape is preferred.

The adhesive tape 200 is adhered to the copper foil 130 or adhered to the nickel layer 142. Some, for example, both ends may be partially overlapped with the gold layer 144 to be adhered, and between both ends of the copper foil 130 It may be adhered to the lower surface of the core 110 through the spaced space.

The adhesive tape 200 may be formed larger or smaller than the lower surface of the main body 100. As a result, whether the adhesive tape 200 is electrically conductive or electrically non-conductive, the electrical contact terminal is an electrically conductive object located at the top and an electrically conductive object located at the bottom. It has a dimension capable of electrically connecting an electrically conductive object.

2 shows an electrical contact terminal according to another embodiment of the present invention.

A configuration different from that of the above embodiment will be described.

The body 100 includes a foamed elastic core 110, a polymer film 120 that wraps and adheres the core 110 through an adhesive, and a copper foil 130 and a copper foil integrally formed on the back surface of the film 120 It is composed of a metal layer 140 formed on the 130.

According to this structure, both sides of the body 100 may be rounded due to the characteristics of the polymer film 120 having high strength and the core 110 having low hardness, in addition to the same effect as in the above-described embodiment.

As an adhesive for reliably elastically bonding the core 110 and the film 120 between the core 110 and the film 120, acrylic resin, urethane rubber, or silicone rubber adhesive may be used.

The polymer film 120 may be, for example, a polyimide (PI) film or a polyester (PET) film, and may have a thickness of about 5 to 30 microns, but is not limited thereto.

As shown in FIG. 2, preferably, both ends of the polymer film 120 are separated from each other to form a space 112, the thickness of the film 120 and the copper foil 130 is thin, so the adhesive tape 200 is a spaced apart space. It may be adhered to the core 110 through 112.

When an elastic rubber such as urethane rubber or silicone rubber is thinly coated between the film 120 and the adhesive, between the copper foil 130 and the adhesive, or both, when an external force is applied to the body 100 in the vertical direction, the copper foil 130 ) Can be easily wrinkled.

As in the above embodiment, looking at the enlarged circles A and B of FIG. 2, the metal layer 140 is all etched away, corresponding to the portion to which the adhesive tape 200 adheres, or the gold layer of the metal layer 140 ( Since 144 is etched away and the nickel layer 142 remains, the adhesive tape 200 is adhered by direct contact with the copper foil 130 or the nickel layer 142.

3 shows an electrical contact terminal according to a modified example of the present invention.

In this example, the adhesive tape 200 is adhered to the copper foil 130 or the nickel layer 142 at about half of the lower surface of the main body 100, and the gold layer 144 is exposed on the remaining portion.

According to this structure, the electrical contact terminal is adhered to the electrically conductive object through the adhesive tape 200, and the exposed gold layer 144 can directly contact the object. As a result, even if the adhesive tape 200 is configured to be electrically non-conductive, there is an advantage that it can conduct electricity in a vertical direction through the gold layer 144 having very excellent electrical conductivity.

The width of the adhesive tape 200 adhered to the lower surface of the main body 100 may be appropriately adjusted according to the size of the portion where the gold layer 144 is exposed.

4 shows an electrical contact terminal according to another embodiment of the present invention.

External force absorption spaces 114 and 115 are formed in the middle of the upper surface of the electrical contact terminal.

Specifically, as shown in the enlarged circles C and D of FIG. 3, the copper foil 130 and the metal layer extend in the longitudinal direction of the electrical contact terminal with a certain width, for example, about 200 microns in the middle of the upper surface of the electrical contact terminal. The external force absorption space 114 is formed by removing the 140, or the external force absorption space 115 is formed by removing the film 120, the copper foil 130, and the metal layer 140.

The copper foil 130 and the metal layer 140 are removed by an etching process, and the film 120 may be provided in a thin width by a cutting process using a blade.

Here, a part of the core 110 together with the film 120 may be cut in the longitudinal direction by a cutting process using a blade. In this case, the external force applied from the upper side by the cut portion of the core 110 is the core ( 110) acts asymmetrically so that the external force is more easily dispersed or absorbed, and as a result, there is an advantage that the contact terminal is not easily separated from the object by the adhesive tape 200.

According to this configuration, the copper foil 130 / metal layer 140 or film 120 / copper foil 130 / metal layer 140 are spaced apart from each other in the width direction around the external force absorption spaces 114 and 115 When an external force is applied in the direction of the upper side of the electrical contact terminal, the external force applied by the asymmetric movement of the core 110 in the external force absorption spaces 114 and 115 is dispersed or absorbed or dispersed and absorbed. As a result, the amount of external force applied to the adhesive tape 200 adhered to the lower surface of the main body 100 can be reduced, so that the adhesive tape 200 does not easily fall off the object.

Usually, when the hardness of the core and the strength of the film are high, the thickness of the copper foil is high, the height of the contact terminal is high, and the width and length are narrow, the contact terminal is applied from the outside even if the adhesive force of the adhesive tape adhered to the lower surface is large. Although it is easy to fall off the adhesive tape by external force, as in this embodiment, external force absorption spaces 114 and 115 are created on the upper surface of the contact terminal to distribute the external force to both sides, so that the separated body 100 is asymmetrically By making it move, less force is applied to the adhesive tape so that it does not fall off easily.

5 shows an electrical contact terminal according to another embodiment of the present invention.

The portions surrounding both sides of the core 110 are bent in an arc shape. According to this embodiment, the polymer film 120 or the copper foil 130 is not adhered to both sides of the core 110 at the bent portion. An empty space 150 is formed.

According to this structure, when the electrical contact terminal is pressed a lot in the vertical direction, it is possible to minimize the wrinkle of the copper foil 130 by the empty space 150.

In particular, as described above, when elastic rubber is coated on the film 120 or the copper foil 130 and the film 120 or the copper foil 130 is not adhered to both sidewalls of the core 110, When an external force is applied, it is possible to minimize the wrinkles of the copper foil 130.

In this embodiment, the example is that the film 120 or the copper foil 130 is not adhered to both sidewalls of the core 110 at all. Unlike this, the empty space 150 may be formed by partially bonding. .

Although the above has been described with the focus on the embodiments of the present invention, it goes without saying that various changes can be made at the level of those skilled in the art. Therefore, the scope of the present invention is limited to the above-described embodiments and cannot be interpreted, and should be interpreted by the claims set forth below.

100: main body
110: core
120: polymer film
130: copper foil
140: metal layer
142: nickel layer
144: gold layer
200: adhesive tape

Claims (11)

As an elastic electrical contact terminal interposed between opposing objects to electrically connect the objects,
It is composed of a body and an adhesive tape adhered to the lower surface of the body,
The main body,
A foamed elastic core of an open cell structure;
A copper foil wrapped around and adhered to the core through an adhesive; And
It includes a metal layer formed on the copper foil,
The metal layer is composed of a nickel layer and a gold layer sequentially formed on the copper foil,
Corresponding to the portion to which the adhesive tape adheres, the gold layer is removed so that the adhesive tape contacts and adheres to the nickel layer, or the gold layer and the nickel layer are removed so that the adhesive tape contacts and adheres to the copper foil. Elastic electrical contact terminal, characterized in that. In claim 1,
An elastic electrical contact terminal, characterized in that a polymer film is adhered to the copper foil between the copper foil and the adhesive. delete In claim 1,
An elastic electrical contact terminal, characterized in that an external force absorption space is formed by removing the copper foil and the metal layer so as to have a certain width on the upper surface of the electrical contact terminal and extend in the longitudinal direction. In claim 4,
A polymer film is further adhered to the copper foil between the copper foil and the adhesive,
An elastic electrical contact terminal, characterized in that the external force absorption space is formed by further removing the film. In claim 4 or 5,
An elastic electrical contact terminal, characterized in that the external force applied to the contact terminal is absorbed by moving the core asymmetrically in the external force absorption space. In claim 1,
An elastic electrical contact terminal, characterized in that the copper foil is coated with an elastic rubber between the copper foil and the adhesive to prevent the copper foil from being wrinkled when an external force is applied to the body in a vertical direction. delete In claim 7,
An elastic electrical contact terminal, characterized in that at least a part of the sidewall of the core does not adhere to the elastic rubber. delete In claim 1,
An elastic electrical contact terminal, characterized in that a reinforcing film including PET is adhered to the upper or lower surfaces of the core or both by self-adhesive or through an adhesive.

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