KR20100125617A - Electric and elastic contact terminal - Google Patents

Abstract

PURPOSE: An electric and elastic contact terminal is provided to supply reliable elastic force by elastic rubber core and also surface mounting is facilitated by vacuum pickup. CONSTITUTION: A first electrical conductivity cover protects a first insulation resilient rubber core. An electric conductivity elastic member(80) is comprised of an electrical conductive which protects a second insulating elastic rubber core and the second insulating elastic rubber core. A metal film is adhesive on one side by posting the adhesive on one side of a first insulating elastic rubber core. An electrical conductive cover of the electrical conductive elastic member is adhesive by electrical conductive adhesive on the other side of the metal film.

Description

Elastic and Elastic Contact Terminal

The present invention relates to an elastic electrical contact terminal, and more particularly, to an elastic electrical contact terminal mounted while penetrating a printed circuit board. Furthermore, the present invention relates to reflow solderable elastic electrical contact terminals by surface mount.

In general, the elastic electrical contact terminal has good electrical conductivity and excellent elasticity, so that the elastic electrical contact terminal must be electrically and mechanically connected to the opposing object with elasticity. In addition, the elastic electrical contact terminal should be economically and reliably mounted to the substrate to be mounted, for example, a printed circuit board by adhesive tape, soldering or riveting. In addition, reflow solderable elastic electrical contact terminals should be designed and manufactured to facilitate surface mounting by vacuum pickup.

Conventional technologies include Korean Patent Registration Nos. 783588 and 839893 filed by the present applicant. According to this patent, the electrical contact terminal is elastically in electrical contact with the opposing object and thus is not electrically insulated from the opposing object. There is a disadvantage that it can not act as an electrical contact terminal.

Another conventional technique is Utility Model No. 390490, filed and registered by the applicant. According to this utility model, the electrical contact terminal is elastically in electrical contact with the opposing object and thus is not electrically insulated from the opposing object, and is mounted on one side of the printed circuit board and is different from the object located on the other side of the printed circuit board. There is a disadvantage in that it cannot act as an elastic electrical contact terminal.

Therefore, the present invention is proposed to solve such a problem, and an object of the present invention is to provide an elastic electrical contact terminal having good elasticity, electrical insulation, and electrical conductivity.

In addition, the present invention provides an elastic electrical contact terminal capable of surface mounting and reflow soldering by vacuum pickup.

In addition, it is to provide an elastic electrical contact terminal capable of electrical contact or insulation contact with the opposite object.

The present invention also provides an elastic electrical contact terminal mounted while penetrating the upper and lower surfaces of a printed circuit board.

In addition, it is to provide a suitable elastic electrical contact terminal when the opposite object is assembled by pushing the side of the elastic electrical contact terminal and when the assembly is pressed on.

In addition, it is to provide an elastic electrical contact terminal that can be in contact with the elastic upper and lower objects with one elastic electrical contact terminal.

The above object, the first insulating elastic rubber core; A metal foil having one surface bonded to one surface of the first insulating elastic rubber core through an adhesive; And an electroconductive elastic member comprising a second insulating elastic core and an electroconductive cover surrounding the second insulating elastic core, wherein the electroconductive cover of the electroconductive elastic member is electrically conductive on the other side of the metal foil. It is achieved by a solderable elastic electrical contact terminal that is bonded by an adhesive.

In addition, the above object, the first insulating elastic rubber core; A first electrically conductive cover surrounding the first insulating elastic core; A metal foil having one surface bonded to one surface of the first electrically conductive cover through a first electrically conductive adhesive; And a second electrically conductive elastic member comprising a second insulating elastic core and a second electrically conductive cover surrounding the second insulating elastic core, wherein the second electrically conductive cover of the electrically conductive elastic member is different from the metal foil. A solderable elastic electrical contact terminal adhered to the surface by a second electrically conductive adhesive is achieved.

In addition, the above object, the elastic rubber core; A metal foil having one surface bonded to one surface of the elastic rubber core through an adhesive; And an electrically conductive elastic contact terminal comprising an electrically conductive elastic member bonded to the other surface of the metal foil by being cured to become an electrically conductive elastic rubber by curing.

In addition, the above object, the elastic rubber core; A metal foil having one surface bonded to one surface of the elastic rubber core through an adhesive; And an electrically conductive elastic member which is an electrically conductive elastic rubber bonded on the via hole of the substrate to which one side is bonded via an electrically conductive adhesive on the other side of the metal foil.

Preferably, the elastic electrical contact terminal is capable of reflow soldering by vacuum pick-up and the metal foil is soldered to the ground portion of the printed circuit board.

Preferably, the back surface of the metal foil is soldered to the ground pattern.

According to the above arrangement, the elastic rubber core provides reliable elasticity and facilitates surface mounting by vacuum pick-up.

In addition, the flat metal foil mounted on the ground pattern of the printed circuit board can be easily mounted on the ground pattern and reflow soldering by solder cream is possible.

In addition, at least one of the elastic rubber core is formed with an electrically conductive cover to electrically connect the ground pattern of the printed circuit board with the opposite object.

In addition, when the heat-resistant cured adhesive is used as the adhesive, reliable adhesion is maintained before and after reflow soldering.

In addition, the elastic electrical contact terminal can have a variety of forms it is easy to have a suitable structure even when the object to be opposed is assembled while pushing the side of the elastic electrical contact terminal or when pressed on the assembly.

In addition, since the elastic rubber of different shapes and dimensions are formed on the upper and lower surfaces of the metal foil, the elastic electrical contact terminals may be mounted through the upper and lower surfaces of the printed circuit board.

In addition, it is possible to provide an elastic electrical contact terminal that elastically contacts the upper and lower surfaces of the printed circuit board by one surface mounting.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a perspective view showing an elastic electrical contact terminal 100 according to an embodiment of the present invention, Figure 2 is a side view, Figure 3 is to mount the elastic electrical contact terminal 100 on a printed circuit board It is a figure explaining.

As shown, the elastic electrical contact terminal 100 is composed of an elastic member 40 and an electrically conductive elastic member 80 coupled to each other in the vertical direction.

The elastic member 40 includes a tubular insulating elastic rubber core 10 and a metal foil 30 that one surface is reliably adhered to the elastic rubber core 10 via the insulating elastic rubber adhesive 20. In addition, the electroconductive elastic member 80 may be formed in a tube-shaped insulating elastic core 50, a part of the electrically conductive silicone rubber coating layer 60 and the electrically conductive silicone rubber coating layer 60 surrounding the elastic rubber core 50. It consists of an electrically conductive elastic rubber adhesive (70) for reliable bonding with the metal foil (30) of the elastic member (40).

Here, the elastic rubber cores 10 and 50 each have the same material but different dimensions, and preferably, the elastic rubber core 10 is larger than the elastic rubber core 50. Referring to FIG. 3, the elastic rubber core 50 is mounted in the via hole 92 to penetrate the printed circuit board 90, and the height of the electrically conductive elastic member 80 is thinner than the thickness of the printed circuit board 90. Can be. However, the present invention is not limited thereto, and the height of the elastic member 80 may be higher than the thickness of the printed circuit board 90.

The elastic rubber cores 10 and 50 may be any one of tubular non-foamed rubber and foam rubber, or foamed rubber and non-foamed rubber filled therein.

Preferably, the thickness of the electrically conductive silicone rubber coating layer 60 of the electrically conductive elastic member 80 is 0.01 mm to 0.3 mm, the electrical resistance is less than 5 ohm.

Detailed description of the elastic member 80 has been described in detail in the Utility Model No. 390490.

Preferably, a portion of the upper surface of the elastic rubber core 10 is at least flat to facilitate vacuum pick-up of the electrical contact terminal 100.

Preferably, the metal foil 30 is a copper foil having a thickness of 0.01 mm to 0.1 mm on which tin, silver, or gold is plated.

Preferably, the electrically conductive elastic rubber adhesive 70 is either solder or an electrically conductive heat resistant polymer adhesive. However, when the electrical contact terminal 100 is not soldered, an electrically conductive double-sided adhesive tape may be used as the electrically conductive elastic rubber adhesive 70. Here, the electrically conductive heat resistant polymer adhesive may be either an electrically conductive silicone adhesive or an electrically conductive epoxy adhesive.

Preferably, the elastic member 80 is smaller in size than the elastic member 40 and the back surface of the metal foil 30 to which the elastic member 80 is not attached is soldered to a printed circuit board or the like.

Referring to FIG. 2, one electrically conductive elastic member 80 is bonded to the back surface of the metal foil 30 of the elastic member 40 in the longitudinal direction of the electrical contact terminal 100 as shown in FIG. As shown in 2 (b), two or more electrically conductive elastic members 80 and 80 'may be bonded.

Preferably, all of the bottom of the elastic member 40 is bonded to the upper portion of the metal foil 30, the bottom of the elastic member 80 is bonded to a portion of the lower portion of the metal foil (30). In this manner, the elastic member 80 is soldered on the back surface of the metal foil 30 at the portion where the elastic member 80 is not formed.

Hereinafter, a method of mounting the elastic electrical contact terminal 100 on a printed circuit board will be described.

Preferably, at least one of the elastic members 40, 80 is electrically conductive.

Referring to FIG. 3, an electrically conductive elastic member 80 of the electrical contact terminal 100 is inserted into the via hole 92 formed in the printed circuit board 90. Here, the via hole 92 is an example structure, and may be a passage that is not a structure of a hole, such as an edge or an edge of the printed circuit board 90.

A conductive pattern 96 including a ground pattern is formed on the surface of the printed circuit board 90 adjacent to the via hole 92, and the metal foil 30 of the elastic member 40 of the electrical contact terminal 100 is formed. For example, it is adhered to the conductive pattern 96 via the solder 94. Here, preferably, the conductive pattern 96 may be separated and soldered to the metal foil 30.

The back surface of the metal foil 30 is divided into a portion where the elastic member 80 is attached and a portion that is not attached, and a portion where the elastic member 80 is not attached is soldered to the conductive pattern 96.

In this case, since the height of the elastic member 80 is low, the opposing object 2 has a structure which protrudes convexly from this site | part.

In this way, when the object (1, 2) facing each other on both sides of the printed circuit board 90 in the state in which the electrical contact terminal 100 is mounted on the printed circuit board 90, the object (1) is an elastic member ( 40 is assembled while elastically pressing, and the object 2 is in electrical contact with the electrically conductive elastic member 80, and as a result, is electrically connected to the conductive pattern 96 of the printed circuit board 90. That is, the conductive pattern 96-electrically conductive adhesive, for example, solder (94)-metal foil (30)-electrically conductive elastic rubber adhesive (70)-electrically conductive silicone rubber coating layer (60)-the object (2) electrically Connected.

Preferably, the surface of the printed circuit board 90 may be flattened so that the conductive conductive member 80 does not protrude to the rear surface of the printed circuit board 90. In this case, the printed circuit board 90 is a single-sided printed circuit board (Single PCB).

However, the present invention is not limited thereto, and the electrically conductive elastic member 80 may protrude to the rear surface of the printed circuit board 90. In this case, the electroconductive elastic member 80 may provide electrical and mechanical elastic contact with the objects 1 and 2 facing up and down the printed circuit board 90.

Meanwhile, the object 1 may be either electrically conductive or non-electrically conductive.

4 illustrates an electrical contact terminal 110 using an electrically conductive cover 62 including an electrically conductive film or an electrically conductive fiber instead of the electrically conductive silicone rubber coating layer 60 in the electrically contact terminal 100 of FIG. 1.

The electrically conductive film may be a flexible flexible metal laminate film (FCCL), the thickness of the metal layer is within 0.001 mm to 0.08 mm, the material is either polyimide (PI) or polyester (PET), in particular soldering Polyimide is applied. The electrically conductive fibers are also metal plated polyester in the form of woven or nonwoven fabrics.

In this case, the electroconductive film or the electroconductive fiber has an advantage that the electrical resistance is lower and the price is cheaper than the electroconductive silicone rubber coating layer 60.

Preferably, the adhesive 61 for attaching the electroconductive cover 62 to the elastic rubber core 50 is a liquid insulating silicone rubber adhesive formed by hardening and maintains reliable adhesion even during reflow soldering.

In this case, in order to solder the electrical contact terminal 100, the adhesive 61 is a silicone rubber adhesive.

For example, the adhesive 61 is formed by curing a liquid silicone rubber adhesive, and simultaneously serves as the adhesive and the elastic body.

Detailed description of the elastic member 80 has been described in detail in the inventor's patent number 839893.

5 is a perspective view of the elastic electrical contact terminal 120 showing the modification of FIG. 1 or 4, wherein the conductive cover 12 is formed to surround the elastic rubber core 10 so that the elastic member 40 is electrically conductive. An elastic member 40 'is formed.

Preferably, the conductive cover 12 is the same material as the conductive covers 60 and 62 of FIG. 1 or 4 and can be formed by the same method.

That is, the conductive cover 12 may be any one of the conductive conductive rubber coating layer 60 or the conductive film 62 formed on the elastic rubber 10.

For example, when the electroconductive cover 12 is the electroconductive film 62, the electroconductive cover 12 is adhered to the elastic rubber core 10 by the insulating silicone rubber adhesive 11.

The electrically conductive adhesive 22 is either an electrically conductive silicone rubber adhesive or an epoxy resin adhesive bonded by curing. Here, when the electrical contact terminal 100 is not soldered, the electrically conductive adhesive 22 may be an electrically conductive double-sided adhesive tape.

When the electrical contact terminal having such a structure is mounted on the printed circuit board 90 as shown in FIG. 3 and the objects 1 and 2 are mounted and assembled, the solder 94 is separated from the ground pattern 96 of the printed circuit board 90. -Metal foil (30)-electroconductive adhesive (22)-electroconductive cover (12)-at the same time electrically connected to the object (1), solder (94)-metal foil (30)-electroconductive adhesive (70)- An electrically conductive silicone rubber coating layer 60-respectively connected to the object 2. Accordingly, the object 1 and the object 2 are elastically and electrically connected to each other.

6 illustrates an electrical contact terminal 130 according to another embodiment of the present invention.

As shown, an electroconductive silicone rubber 64 is formed on the back surface of the metal foil 30 as an electroconductive elastic member without a separate electroconductive adhesive.

Here, the electrically conductive silicone rubber 64 dispenses a liquid electrically conductive silicone rubber adhesive to the back surface of the metal foil 30 to a predetermined size and height, and then cures the adhesive to the metal foil 30 without a separate electrically conductive adhesive. Is formed.

As such, a technique for dispensing and curing a liquid electroconductive rubber to produce an electroconductive rubber is a generalized technique.

Preferably, the hardness of the electrically conductive silicone rubber 64 is Shore A 50 to 90, and the electrical resistance is 5 ohm or less.

Preferably, the thickness of the electrically conductive silicone rubber 64 is within 3 mm in consideration of the thickness of the conventional printed circuit board 90.

7 illustrates an electrical contact terminal 140 according to another embodiment of the present invention.

The conductive silicone rubber 64 is adhered to the metal layer on one side of the insulating substrate 66 with the top and bottom surfaces electrically connected to each other by via holes on the back side of the metal foil 30, and the metal layer on the other side is electrically The back surface of the metal foil 30 is adhered by the conductive adhesive 70. As such, the insulating substrate 66 and the electrically conductive silicone rubber 64 adhered thereon form one elastic member.

Here, the electrically conductive silicone rubber 64 is electrically connected to the electrically conductive adhesive 70 by the electrically conductive via hole.

Here, the electrically conductive silicone rubber 64 is formed by dispensing the liquid electrically conductive silicone rubber on a metal layer of the insulating substrate 66 to a certain size and height, and then curing the liquid conductive silicone rubber to the metal foil 30.

Preferably, the hardness of the electrically conductive silicone rubber 64 is Shore A 50 to 90, the electrical resistance is 5 ohm or less, and the height is within 3 mm.

The elastic electrical contact terminal 100 manufactured as described above has the following advantages.

First, the electrical contact terminal 100 has good elasticity by the elastic rubber cores 10 and 50 and is easy to be surface mounted by a vacuum pickup.

In addition, since the metal foil 30 is precisely and reliably flat, the reflow soldering is easy and the soldering strength is good.

In addition, when the height of the electrically conductive elastic members 80 and 80 'of the electrical contact terminal 100 is thinner than the thickness of the printed circuit board 90, the electrically conductive elastic members 80 and 80' are formed on the bottom surface of the printed circuit board. Since the printed circuit board is a single-sided printed circuit board, it is easy to mount the surface by vacuum pickup.

In addition, when the height of the electrically conductive elastic members 80 and 80 'of the electrical contact terminal 100 is higher than the thickness of the printed circuit board 90, the electrically conductive elastic members 80 and 80' are formed on the bottom surface of the printed circuit board. It is easy to elastically come into contact with the objects 1 and 2 facing out.

In addition, it is easy to distinguish the top and bottom, reel packaging by the vacuum pickup is easy, and due to the weight of the metal foil 30, there is little movement during reflow soldering.

In addition, the use of heat resistant adhesives ensures reliable adhesion even with the heat provided during reflow soldering.

In addition, a part of the upper surface of the electrical contact terminal 100 to form a plane, it is easy to pick up the vacuum.

In addition, since the electrically conductive elastic member 80 adhered to a portion of the rear surface of the metal foil 30 is disposed to penetrate the printed circuit board, the electrical and the objects 1 and 2 opposing the ground pattern on the upper portion of the printed circuit board. It is easy to connect mechanically.

In addition, by forming elastic bodies 40 and 80 having different dimensions and structures above and below the metal foil 30, electrical, physical and mechanical contact with the object to be opposed by various methods is easy.

The manufacturing method of the electrical contact terminal 100 having such a structure will be described.

An elastic rubber core 10 cast in a roll form on a liquid silicone rubber adhesive, which is cured by heat or moisture, on one side of a metal foil 30 having a constant width to a thickness of 0.01 mm to 0.05 mm. Put on and apply heat to adhere the metal foil 30 and the elastic rubber core 10 with an insulating elastic rubber adhesive (20).

Specifically, a certain force is applied to the metal foil 30 while applying a certain thickness of the adhesive 20 bonded by curing on the metal foil 30 having a width equal to or slightly larger than the width of the bottom surface of the elastic rubber core 10. Applying heat while applying, the adhesive 20 reliably adheres the elastic rubber core 10 and the metal foil 30 while curing.

At this time, if the thickness of the liquid silicone rubber adhesive forming the adhesive 20 is too thin, the adhesive force is poor between the elastic rubber core 10 and the metal foil 30, and if the thickness is too thick, the liquid silicone rubber adhesive may be a metal foil. There is a disadvantage in that it leaks into both ends of (30) and prevents soldering.

Here, in the case of using the electrically conductive adhesive, the thickness of the electrically conductive adhesive is made as thin as possible to reduce the electrical contact resistance with the metal foil 30.

Subsequently, after dispensing the electrically conductive liquid silicone rubber adhesive that is cured by heat or moisture on a predetermined portion of the back surface of the metal foil 30 to a predetermined size, it is made of a bulk on it and reel taped. The electroconductive elastic member 80 is placed using a chip mountor, and then heat is applied to bond the metal foil 30 and the electroconductive elastic member 80 with the electroconductive adhesive 70.

At this time, the electrically conductive elastic member 80 is attached to only a predetermined portion of the rear surface of the metal foil 30 and the portion not attached is soldered with the ground pattern 96.

Thereafter, by cutting to a certain size to produce an electrical contact terminal 100 in a single state.

Thereafter, the electrical contact terminal cut using the vacuum packaging machine is reel taped to a carrier tape.

Herein, the manufacturing method for the exemplary embodiment of FIG. 1 has been described, but for another exemplary embodiment of the present invention, it may be manufactured using a similar or the same method.

In addition, the detailed description of the manufacturing method for the elastic members (40 ', 80, 80') has been described in detail in the Utility Model No. 390490 and the Patent No. 839893.

In the electrical contact terminal 100 manufactured as described above, the upper surface of the metal foil 30 is made of an electrically insulating elastic body, and the lower surface is made of an electrically conductive elastic member 80, and is electrically insulated from the opposite object 1. It is elastically contacted in the state, and is electrically connected with the opposing object 2.

In addition, it is easy to distinguish the upper and lower surfaces of the electrical contact terminal 100, so that the vacuum pickup is easy, and in particular, due to the self-weight of the metal foil 30, it is not easily moved by the wind supplied when the surface is mounted by the vacuum pickup.

In addition, the lower surface of the electrical contact terminal 100 is a flat metal foil 30 having precise dimensions, so that the yield and soldering strength are good when reflow soldering, and the upper surface of the electrical contact terminal 100 forms a flat surface to form a vacuum. Pick up is easy.

In addition, since at least one elastic member 40 ', 64, 80, 80' of the electrical contact terminal 100 is electrically conductive, the ground pattern 96 and at least one object (1, 2) is electrically connected.

In the above description, the embodiment of the present invention has been described, but various changes or modifications can be made at the level of those skilled in the art. For example, the structures of the electrical contact terminals according to the above embodiments and modifications may be mixed or used in parallel.

For example, in the above embodiment, the upper member and the lower member are disposed to face in the same direction, but by arranging them at arbitrary angles, it is possible to cope with the situation of the printed circuit board and the opposite object. In addition, at least one of the elastic members of various structures and dimensions may be electrically conductive.

Such changes and modifications may be said to belong to the present invention without departing from the scope of the present invention, and therefore, the scope of the present invention should be judged by the claims described below.

1 is a perspective view showing an elastic electrical contact terminal 100 according to an embodiment of the present invention.

FIG. 2 is a side view of the electrical contact terminal of FIG. 1.

3 is a view for explaining the mounting of the elastic electrical contact terminal 100 on a printed circuit board.

4 shows the electrical contact terminal 110 using the electroconductive cover 62 for the elastic member 40.

5 is a perspective view of the elastic electrical contact terminal 120 showing a modification of FIG.

6 illustrates an electrical contact terminal 130 according to another embodiment of the present invention.

7 illustrates an electrical contact terminal 140 according to another embodiment of the present invention.

Claims (10)

A first insulating elastic core; A metal foil having one surface bonded to one surface of the first insulating elastic rubber core through an adhesive; And An electrically conductive elastic member comprising a second insulating elastic core and an electrically conductive cover surrounding the second insulating elastic core, The electroconductive cover of the electroconductive elastic member is solderable elastic electrical contact terminal, characterized in that bonded to the other surface of the metal foil by an electroconductive adhesive. A first insulating elastic core; A first electrically conductive cover surrounding the first insulating elastic core; A metal foil having one surface bonded to one surface of the first electrically conductive cover through a first electrically conductive adhesive; And An electrically conductive elastic member comprising a second insulating elastic core and a second conductive cover surrounding the second insulating elastic core, And the second electroconductive cover of the electroconductive elastic member is adhered to the other side of the metal foil by a second electroconductive adhesive. Elastic rubber core; A metal foil having one surface bonded to one surface of the elastic rubber core through an adhesive; And Solderable elastic electrical contact terminal, characterized in that it comprises an electrically conductive elastic member bonded to the other surface of the metal foil is made of an electrically conductive elastic rubber by curing the electrically conductive rubber. Elastic rubber core; A metal foil having one surface bonded to one surface of the elastic rubber core through an adhesive; And Solderable elastic electrical contact terminal characterized in that it comprises an electrically conductive elastic member of an electrically conductive elastic rubber bonded to the via hole of the substrate bonded to one side through the conductive adhesive on the other side of the metal foil. The method according to claim 1 or 2, The electrically conductive cover is a solderable elastic electrical contact terminal, characterized in that the conductive silicone rubber coating layer formed by curing the elastic rubber core. The method according to claim 1 or 2, The electroconductive cover is a solderable elastic electrical contact terminal, characterized in that it comprises an electrically conductive film or an electrically conductive fiber adhered to the elastic rubber core by an insulating adhesive. The method according to any one of claims 1 to 4, The electrically conductive elastic member is solderable elastic electrical contact terminal, characterized in that a plurality of adhesive to the metal foil in the longitudinal direction of the electrical contact terminal. The elastic electrical contact terminal according to any one of claims 1 to 4; And A printed circuit board having a grounding pattern and having a passage connecting a surface and a back surface thereof; And the metal foil of the elastic electrical contact terminal is bonded to the ground pattern, and the electrically conductive elastic member of the elastic electrical contact terminal is inserted into the passage. The method according to claim 8, And the metal foil is bonded to the ground pattern by reflow soldering. The method according to any one of claims 1 to 4, The elastic electrical contact terminal is characterized in that the reflow soldering by vacuum pick-up, the elastic electrical contact terminal.

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