KR101018735B1 - Solderable Elastic Conductive Contact Terminal - Google Patents

Abstract

Solderable elastic electrical contact terminals are disclosed. The electrical contact terminal, the elastic rubber having a constant volume; An elastic rubber coating layer bonded to surround the outer surface of the elastic rubber in the longitudinal direction; And a flexible metal member wound on the outer surface of the elastic rubber coating layer continuously in the longitudinal direction and bonded to the elastic rubber coating layer. The metal member located on the surface of the elastic rubber coating layer is mechanically and electrically elastically in contact with the opposing electrically conductive object, and the metal member located on the rear surface is soldered onto the printed circuit board, so that the object and the printed circuit board are mutually Electrically connected, the elastic rubber and the elastic rubber coating layer provides elasticity.

Electrical Contact Terminal, Elastic, Reflow Soldering, Surface Mount, Hardening, Coating, Metal Wire, Electrically Conductive Film, Flexible Metal Laminated Film, FCCL, Tilt, Pitch, Pitch, Winding, Spiral winding, Coverage, Coverage, Coverage

Description

Solderable Elastic Conductive Contact Terminal

The present invention relates to an elastic electrical contact terminal, and more particularly, to an elastic electrical contact terminal capable of soldering on a printed circuit board while electrically and mechanically connecting opposite electrically conductive objects and a printed circuit board. In particular, the present invention relates to an elastic electrical contact terminal capable of solder cream and reflow soldering by surface mounting.

In general, an elastic electrical contact terminal capable of reflow soldering should have good electrical conductivity, excellent elastic resilience, and be able to withstand soldering temperatures.

The prior art is U.S. Patent No. 7,129,421 to Gore. According to this patent, a solderable electroconductive support layer having a crimp is formed in the compression hole of the electroconductive gasket material in which the compression hole is formed, so that productivity is improved when the electroconductive support layer is inserted into the compression hole and folded. There is a downside to falling.

Another conventional technique is Domestic Publication No. 2000-0071258 by Shin-Etsu Polymer, Japan. According to this conventional technique, since the conductive thin wire is not formed on the rear surface of the insulating foam elastomer, it is impossible to provide the electrical conductivity of the surface on the back side, and the insulating protective rubber sheet has the disadvantage that soldering is not possible. Moreover, since the metal wires adjacent to each other maintain insulation, each metal wire is not electrically connected to each other.

Another conventional technique is Patent No. 0783588 filed by the inventor in Korea. According to the conventional technology, since the flexibility and elasticity of the heat-resistant polymer film having a metal layer are inferior to that of the elastic rubber, the flexibility of the elastic electrical contact terminal can be achieved when the elastic rubber is continuously wrapped with the heat-resistant polymer film in the width direction of the elastic rubber. And there is a disadvantage that the elasticity is bad. In addition, since the size of the elastic rubber is not precise, when the elastic rubber is wrapped with the heat-resistant polymer film having a constant width, the gap between the heat-resistant polymer film is not constant.

It is an object of the present invention to provide a solderable elastic electrical contact terminal which reliably provides the electrical conductivity of the surface of the elastic electrical contact terminal to the back side through a plurality of metal members.

It is another object of the present invention to provide an elastic electrical contact terminal which can be soldered with good elasticity, restoring force and flexibility by winding a metal member continuously with a diagonal line with a constant insulation interval.

Another object of the present invention relates to an elastic electrical contact terminal capable of soldering with improved soldering strength and electrical conductivity.

It is another object of the present invention to provide an elastic electrical contact terminal capable of soldering with little deformation due to external forces by attaching a metal member to an elastic rubber coating layer.

Another object of the present invention is to provide a solderable elastic electrical contact terminal capable of economically adjusting soldering strength and elastic force.

Another object of the present invention is to provide an elastic electrical contact terminal capable of soldering surface mounts by vacuum pick-up and reflow soldering by solder cream.

It is another object of the present invention to provide an elastic electrical contact terminal capable of soldering, which makes it easy to distinguish a back surface from a surface without a separate identification mark.

Another object of the present invention is to provide an elastic electrical contact terminal capable of soldering having a strong soldering strength by improving lead rise of the electrical contact terminal.

Another object of the present invention is to provide an elastic electrical contact terminal capable of increasing the weight of the electrical contact terminal and increasing the soldering area, so that soldering with little movement during reflow soldering is possible.

The above object is, elastic rubber having a constant volume; An elastic rubber coating layer bonded to surround the outer surface of the elastic rubber in the longitudinal direction; And a flexible metal member wound on the outer surface of the elastic rubber coating layer continuously in the longitudinal direction and bonded to the elastic rubber coating layer. The metal member located on the surface of the elastic rubber coating layer is mechanically and electrically elastically in contact with the opposing electrically conductive object, and the metal member located on the rear surface is soldered onto the printed circuit board, so that the object and the printed circuit board are mutually Electrically connected, the elastic rubber and the elastic rubber coating layer is achieved by a solderable elastic electrical contact terminal providing elasticity.

In addition, the above object, an elastic rubber having a constant volume; And a flexible metal member continuously wound on the outer surface of the elastic rubber in the longitudinal direction and provided with a heat resistant elastic rubber adhesive to be bonded to the elastic rubber. And the metal member located on the surface of the elastic rubber is mechanically and electrically elastically in contact with an opposing electrically conductive object, and the metal member located on the back surface is soldered onto a printed circuit board, so that the object and the printed circuit board are mutually Electrically connected, the elastic rubber is achieved by a solderable elastic electrical contact terminal that provides elasticity.

Preferably, the elastic rubber may have a width of the rear surface of the elastic rubber greater than a width of the surface and a portion of the rear surface and the surface of the elastic rubber.

Preferably, the heat resistant support may be interposed between the back surface of the elastic rubber or the elastic rubber coating layer and the metal member, or the heat resistant film may be interposed between the metal member and the surface of the elastic rubber or elastic rubber coating layer.

Preferably, the heat-resistant support and the heat-resistant film may be coated with a silicone adhesive that satisfies the soldering conditions.

The elastic rubber may be an insulating non-foamed silicone rubber, and the elastic rubber coating layer may be either electrically conductive or non-conductive silicone rubber.

Preferably, the metal member may be either a circular soft metal wire or a heat resistant polymer film having a metal layer formed thereon. In addition, the outer surface of the metal member may be plated by any one of tin, silver or gold.

Preferably, the metal member can be wound by a spiral winding.

In addition, an electrically conductive elastic rubber coating layer may be further attached over the elastic rubber or the elastic rubber coating layer and the metal member.

Preferably, the elastic electrical contact terminal is reflow solderable by the solder cream according to the vacuum pickup.

By the structure and configuration of the present invention, the elastic electrical contact terminal of the present invention has the following effects.

Part of the back and surface of the electrical contact terminals is substantially planar, allowing reflow soldering by vacuum pickup.

Several metal elements on the surface of the electrical contact terminals provide reliable electrical contact with the opposing object and are simultaneously electrically connected and soldered to the backside.

Flexible metal members wound in a continuous line diagonally with a constant insulating gap have reliable elasticity, restoring force and flexibility even with repeated compression provided from the outside.

The metal member adhered to the rubber coating layer is not easily deformed and moves together with the rubber coating layer by the force provided by the external force.

The electrically conductive elastic rubber coating layer improves the electrical conductivity and reduces the electromagnetic waves generated from the metal member.

It is easy to adjust the elastic force, restoring force and flexibility of the electrical contact terminal by adjusting the material, structure and dimensions of the elastic rubber and elastic rubber coating layer.

The elasticity, resilience, flexibility, electrical conductivity and soldering strength of the electrical contact terminals can be adjusted by adjusting the material, number, dimensions and spacing of the metal members.

The use of thin diameter ductile metal wire as a metal member provides good soldering strength and reflow soldering.

By using a heat-resistant polymer film having a thin metal layer and a wide metal layer as a metal member, vacuum pick-up is easy, productivity is high, and reflow soldering is possible.

It is possible to improve soldering strength and workability by interposing a heat-resistant support or a heat-resistant film between the elastic rubber coating layer and the metal member.

A heat resistant adhesive may be coated on the heat resistant support and the heat resistant film to facilitate workability.

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

1. First embodiment

1 shows a solderable elastic electrical contact terminal 100 according to a first embodiment of the present invention.

Referring to FIG. 1, the elastic electrical contact terminal 100 is formed by sequentially bonding an elastic rubber (core) 10, a non-foaming elastic rubber coating layer 20, and a metal member 30. Specifically, the elastic rubber 10 having a constant volume; A non-foamed elastic rubber coating layer 20 surrounding the outer surface in the longitudinal direction of the elastic rubber 10 and bonded to the elastic rubber; And a flexible metal wire 30 which is horizontally inclined to the outer surface of the elastic rubber coating layer 20 to continuously wrap and bond the elastic rubber coating layer 20.

Preferably, the metal wire has a constant slope with respect to the width direction and is wound at a predetermined insulation interval.

According to this structure, the multiple-stranded metal wire 30 located on the surface of the electrical contact terminal 100 is electrically and mechanically elastically contacted with the opposing electrically conductive object to supply electricity to the multiple-stranded metal wire 30 on the back surface. In addition, a plurality of strands of the metal wire 30 located on the back side can be soldered, and the elastic rubber 10 and the elastic rubber coating layer 20 satisfy the soldering conditions while providing elasticity and resilience to the electrical contact terminal 100. And flexibility.

In particular, since the back surface of the elastic rubber 10 is flat, reflow soldering is easy, and at least a part of the surface is flat, so that vacuum pickup is easy.

In addition, it is easy to adjust the elastic force, the restoring force and the flexibility of the electrical contact terminal 100 by adjusting the material, structure and dimensions of the elastic rubber (10).

In addition, the metal wire 30 having a ductile thin diameter is partially embedded on the elastic rubber coating layer to be wound obliquely continuously so that the electrical contact terminal 100 has reliable elasticity, restoring force, and flexibility. That is, the flexible metal wire 30 wound around the elastic rubber coating layer 20 at an angle to the width direction may partially disperse and absorb external force applied vertically.

In addition, a portion of the metal wire 30 embedded in the elastic rubber coating layer 20 is bonded to the metal wire 30 has less movement when a force is applied from the outside and also moves together with the elastic rubber coating layer 20 to have a certain degree of elasticity and restoring force.

In addition, the metal wire 30 is made of the metal itself, for example, 99.9% copper, very low electrical resistance and good soldering. Furthermore, since one metal wire 30 has a narrow pitch and is wound continuously, less breakage is caused by external force after soldering.

In addition, by adjusting the diameter and pitch of the metal wire 30, it is possible to adjust the elastic force, restoring force and flexibility, electrical conductivity and soldering strength of the electrical contact terminal 100.

In addition, vacuum pick-up by a vacuum pick-up may be possible by adjusting the insulating gap of the metal wire 30 having a small diameter.

In addition, since the elastic rubber coating layer 20 is made of a silicone rubber adhesive, it is not melted by heat again after curing, thereby maintaining reliable adhesion and flexibility before and after soldering.

In addition, since the width of the back surface of the elastic rubber 10 to be soldered is greater than the width of the surface, the soldering strength is good, and further, the upper and lower sides can be easily distinguished to facilitate reel packaging and surface mounting by vacuum pickup.

Hereinafter, each component is explained in full detail.

1.1 Elastic rubber (10)

The elastic rubber 10 having a predetermined volume located at the innermost portion of the electrical contact terminal 100 is formed of a tube-shaped non-foamed elastic rubber having a hole therein, but is not limited thereto, considering elastic force, pressing force or size, etc. Thus, foamed elastic rubber or non-foamed elastic rubber, etc., in which holes are not formed, may be applied.

The elastic force, the restoring force and the flexibility of the electrical contact terminal 100 is highly dependent on the elastic force, the restoring force and the flexibility of the elastic rubber 10, the material and structure of the elastic rubber 10 is preferably a fast recovery speed to the extent possible. .

In this embodiment, the elastic rubber 10 is a back surface and at least a part of the surface is a plane, the width of the back surface is a tubular silicone rubber wider than the width of the surface, the dimensions are approximately 2mm in width, 2mm in height and The length is 3 mm.

The material of the elastic rubber 10 is preferably, but not limited to, heat-resistant insulating non-foaming silicone rubber in order to have a proper elasticity and restoring force, elasticity, elasticity and elasticity that does not melt by heat and withstand soldering performed within about 280 ℃ Rubber materials may be applied.

Preferably, the hardness of the elastic rubber 10 material is Shore A 20 to 80.

Preferably, the elastic rubber 10 is continuously produced in a reel form by an extrusion process and is formed by cutting after fully curing.

Preferably, the back surface of the elastic rubber 10 is easily reflow soldering, and a portion where the back surface and the both sides of the elastic rubber 10 meet each other at a right angle with good soldering strength.

Preferably, both sides of the elastic rubber 10 are symmetrical and narrow in shape from the rear surface to the surface to allow reliable electrical and mechanical contact with the opposing object.

Preferably, the upper both side edges of the elastic rubber 10 are formed in a round shape to facilitate handling, and both sides in the process of assembling with the opposite object after soldering the finished electrical contact terminal 100 to a printed circuit board or the like. The jam at the corners can be prevented.

Preferably, since the width of the back surface of the elastic rubber 10 is larger than the width of the surface, it is easy to distinguish the upper and lower sides in vacuum packaging, and is less moved by wind when reflow soldering, and the soldering strength is good.

Preferably, the metal not shown in FIG. 1 when extruding the elastic rubber 10 to increase the weight of the elastic rubber 10 on the inside or the back of the elastic rubber 10 or to improve the reflow soldering yield. A plate or a metal wire can be formed.

1.2 Elastic rubber coating layer (20)

The elastic rubber coating layer 20 is positioned between the elastic rubber 10 and the metal wire 30 to bond the elastic rubber 10 and the metal wire 30 with elasticity reliably.

In this embodiment, the elastic rubber coating layer 20 is made of a silicone rubber coating layer that is cured by heat, but not limited to this, a heat-resistant elastic rubber pressure-sensitive adhesive that withstands the soldering temperature and maintains the adhesive force before and after soldering may be applied.

Since the elastic rubber coating layer 20 does not melt again by heat after curing once, maintains the adhesive strength before and after soldering and always maintains elasticity. Accordingly, some surfaces of the metal wire 30 are embedded in the elastic rubber coating layer 20 to be reliably bonded.

Preferably, the hardness of the elastic rubber coating layer 20 is Shore A 20 to 60 and the thickness is about 0.02 to 0.2mm.

In this embodiment, the elastic rubber coating layer 20 is a non-foamed insulating elastic rubber coating layer, but is not limited to this, and may be a non-foaming electrically conductive elastic rubber coating layer. When the elastic rubber coating layer 20 is a non-foaming electrically conductive elastic rubber coating layer, it improves the electrical conductivity of the electrical contact terminal 100, and furthermore, electromagnetic waves (EMI) generated from the metal wire 30 connected from the surface to the back surface It serves to attenuate.

Preferably, the electrically conductive elastic rubber coating layer may be prepared by mixing 50% or more of the metal powder by weight in the liquid silicone rubber.

Preferably, the elastic rubber coating layer 20 is a liquid silicone rubber is formed by curing, in order to increase the working speed uses a type that is completely cured by heat.

Preferably, in order to obtain reliable adhesive strength, an adhesion enhancing agent may be added to the liquid silicone rubber, or the object to be bonded, that is, the elastic rubber 10 or the metal wire 30 may be used by surface treatment such as corona treatment.

As such, referring to FIG. 1, which is a first embodiment, the elastic rubber coating layer 20 is interposed between the elastic rubber 10 and a plurality of strands of metal wires 30 and before and after soldering to the elastic rubber 10 and the metal. The wire 30 is elastically bonded.

1.3 metal wire (30)

In this embodiment, a flexible copper metal wire 30 is wound on the outermost surface of the electrical contact terminal 100, but is not limited thereto, and has a narrow width and a thin thickness, is flexible, and withstands soldering temperature. A metal member, for example, a heat resistant polymer film having a metal layer formed thereon, may be applied. For example, a flexible metal laminated film (FCCL) or a composite metal wire wrapped in a very thin heat resistant polymer seal may be used.

The metal wire 30 may be wound on the elastic coating layer 20 by the primary winding.

In this embodiment, the metal wire 30 is a flexible copper wire and has a diameter of 0.03 to 0.12 mm. In addition, a heat-resistant polymer film having a solderable metal layer instead of the metal wire 30 may be applied, which will be described later.

Preferably, the outside of the metal wire 30 may be plated with any one of tin, silver or gold to improve corrosion protection and soldering strength.

Preferably, the inclined angle of the metal wire 30 may be, for example, 40 degrees or more.

Preferably, the metal wire 30 is wound at a predetermined inclination angle in the longitudinal direction and partially embedded in the elastic rubber coating layer 20 so that the metal wire 30 may move with the elastic rubber coating layer 20 with less movement by an external force. have.

Preferably, at least 1/3 of the diameter of the metal wire 30 is exposed to the outside without being embedded in the elastic rubber coating layer 20 for good soldering strength and reliable electrical contact with the opposing electrically conductive object.

Preferably, the metal wires 30 may be wound on the elastic rubber coating layer 20 while being in contact with each other, or may be wound with a constant insulation gap. When the insulation interval between the metal wires 30 is wide, the elastic restoring force is good, and when the insulation interval is narrow, the soldering strength is good.

As such, the multiple strands of the flexible metal wire 30 continuously wound and wound on the elastic rubber coating layer 20 to provide the electrical conductivity of the surface of the metal wire 30 to the back side reliably and also to the metal The back surface of the wire 30 is soldered. In addition, the metal wire 30 has a suitable elasticity while being physically protected by the elastic rubber 10 and the elastic rubber coating layer (20).

1.4 Manufacturing Method of Electrical Contact Terminal 100

Hereinafter, a method of manufacturing the electrical contact terminal 100 will be described.

The cured elastic rubber 10 having a hole formed inside the rear surface and a part of the surface thereof is continuously passed through an elastic rubber coating liquid of a thermosetting liquid, for example, a liquid silicone rubber, thereby providing a liquid phase on the elastic rubber 10. Coating the elastic rubber coating liquid thinly, for example, 0.03 mm thick, and then continuously passing a high temperature, for example, at a temperature of 100 ° C. for about 20 seconds, partially hardening the surface of the liquid elastic rubber coating liquid to form a liquid elastic coating liquid. When the surface of the hand touches, there is no stickiness, and the inside has stickiness.

Thereafter, a tin-plated flexible copper wire having a diameter of 0.08 mm is wound side by side on the elastic rubber coating layer continuously using a spiral winder.

At this time, since the copper wire is wound with a constant pitch, the copper wire is wound continuously with a diagonal line having a constant angle.

Preferably, the winding angle and the covering rate of the copper wire may vary depending on the elastic force and the soldering strength of the elastic electrical contact terminal 100, but when the force is applied to the electrical contact terminal 100 in the vertical direction from the outside, the force is removed. The electrical contact terminal 100 can be reliably returned to its original position.

At this time, since the hardness of the elastic rubber 10 and the elastic rubber coating layer is much lower than the copper wire 30, when the metal wire 30 is wound with force, the copper wire 30 is completely in the partially cured elastic rubber coating layer The copper wires are buried and wound so that they are electrically insulated and should be wound with moderate force.

In this way, one side of the copper wire is embedded in the elastic rubber coating layer, and the other side is exposed to the outside and wound.

Preferably, at least one third of the diameter of the copper wire is not embedded in the elastic coating layer.

Subsequently, when a part of the copper wire is embedded and wound around the elastic rubber coating layer, the oven is completely cured by partially passing the oven, and the partially cured elastic rubber coating layer becomes the fully cured elastic rubber coating layer 20 while the metal wire is completely cured. (30) and the elastic rubber (10).

Then, the cutter is cut to the required length using a cutter.

Subsequently, although not shown in FIG. 1, the soldering process may be performed so that the metal wires 30 at both ends of the electrical contact terminal 100 are not loosened.

Thereafter, the cut electrical contact terminal 100 is reel taped using a vacuum packaging machine.

According to the electrical contact terminal 100 manufactured through this process, the metal wire 30 located on the surface of the elastic rubber coating layer 20 is mechanically and electrically elastic contact with the opposing electrically conductive object, the metal located on the back The wire 30 is soldered onto the printed circuit board, and the object and the printed circuit board are electrically connected to each other, and the elastic rubber and the elastic rubber coating layer provide elasticity.

Furthermore, the electrical contact terminal 100 has a flat back surface and a part of the surface is also flat, so that solder cream and reflow soldering by vacuum pick-up are possible.

2. Second embodiment

2 shows an electrical contact terminal 110 according to a second embodiment of the present invention.

Referring to FIGS. 1 and 2, FIG. 2 illustrates that the metal wire 30 is wound with a wide pitch on a part of the surface of the electrical contact terminal 100 in FIG. 1, in which the elastic rubber coating layer 20 is external. Is exposed a lot.

As such, the portion of the elastic rubber coating layer 21 exposed to the outside facilitates the vacuum pickup of the electrical contact terminal 110 more easily.

Preferably, the size of the portion 21 of the surface of the electrical contact terminal 110 is larger than the inner diameter of the nozzle for vacuum pickup.

The method of forming the elastic rubber coating layer portion 21 is formed by adjusting the pitch of the metal wire 30 in the portion 21 using a constant tool when the metal wire 30 is wound sideways on the elastic rubber coating layer 20. can do.

3. Third embodiment

3 shows an electrical contact terminal 120 according to a third embodiment of the present invention.

Referring to FIG. 3, a sheet-shaped heat resistant support 40 having a width corresponding to the width direction of the electrical contact terminal 120 is interposed between the back surface of the elastic rubber coating layer 20 and the metal wire 10.

The width of the heat resistant support 40 may be greater than or equal to the width of the elastic rubber coating layer 20.

Preferably, the heat resistant support 40 may be a metal sheet or a heat resistant polymer sheet that resists soldering, and the thickness may be between about 0.02 and 0.3 mm.

The surface or back of the heat resistant support 40 may be coated with a heat resistant silicone adhesive to withstand soldering.

According to this structure, the metal wire 30 is not embedded in the elastic rubber coating layer 20 by the heat-resistant support 40 on the back side, thereby providing more reliable electric conductivity and soldering strength.

In addition, the back surface of the electrical contact terminal 120 by the heat resistant support 40 is more horizontally reliably, the yield of reflow soldering is good.

In addition, when the heat-resistant support 40 is a metal sheet, it has stronger soldering strength by the strength with which the metal sheet was equipped.

In addition, by the heat-resistant support 40 to form the angle of the lower both edges of the electrical contact terminal to be close to the right angle to improve the lead rise property to improve the soldering strength.

In addition, the weight of the heat-resistant support 40 itself increases the weight of the electrical contact terminal 120 to reduce movement during reflow soldering.

In addition, workability is facilitated by a heat-resistant silicone adhesive coated on the surface or the back of the heat-resistant support 40.

In the forming method, when the metal wire 30 is wound on the elastic rubber coating layer 20, the heat-resistant support 40 is placed on the rear surface of the elastic rubber coating layer 20 and the metal wire 30 is wound.

4. Fourth embodiment

4 shows an electrical contact terminal 130 according to a fourth embodiment of the present invention.

Referring to FIG. 4, a sheet-shaped heat resistant film 50 having a width corresponding to a part of the width direction of the electrical contact terminal 130 is interposed between the surface of the elastic rubber coating layer 20 and the metal wire 30. .

Preferably, the heat resistant film 50 may be any one of a heat resistant film such as a flexible metal laminated substrate (FCCL), polyimide, or Teflon having a metal layer having a thickness of 0.05 mm or less.

Preferably, the heat-resistant silicone pressure-sensitive adhesive may be coated on the front and rear surfaces of the heat-resistant film 50.

According to this structure, the metal wire 30 is not embedded in the elastic rubber coating layer 20 on the surface by the heat-resistant film 50 to provide a more reliable electrical contact with the opposite object.

In addition, when the heat-resistant film 50 is electrically conductive, the electrical contact terminal 130 has a better electrical conductivity.

Moreover, work is easy by the heat resistant silicone adhesive of the heat resistant film 50. FIG.

In the forming method, when the metal wire 30 is wound sideways on the elastic rubber coating layer 20, it is wound while inserting a heat-resistant film on the surface of the elastic rubber coating layer 20.

5. Fifth Embodiment

5 shows an electrical contact terminal 140 according to a fifth embodiment of the present invention.

Referring to FIG. 5, the multiple strands of metal wire pairs 31, 32, 33 are rolled up on the elastic rubber coating layer 20 at a constant inclination angle and pitch.

Preferably, the metal wire pairs 31, 32, 33 are two or more strands, and the diameter and material are the same.

According to such a structure, compared with the winding using the metal wire 30 of the thin wire | line diameter, there exists an advantage that the working speed is very excellent.

Although not shown in FIG. 5, preferably, the cut portion of the electrical contact terminal 140 is soldered such that the cut metal wire pairs 31, 32, and 33 are not loosened.

In the forming method, the pair of metal wires 31, 32, and 33 may be wound sideways on the elastic rubber coating layer 20 as a single metal wire.

6. Sixth embodiment

6 shows an electrical contact terminal 150 according to a sixth embodiment of the present invention.

Referring to FIG. 6, instead of the metal wire 30, the heat-resistant polymer film 35 or the metal foil on which the metal layer is formed is wound on the elastic rubber coating layer 20 with a constant inclination angle and pitch by the lateral winding.

At this time, the metal layer of the heat resistant polymer film 35 having the metal layer is wound so as to be exposed to the outside of the electrical contact terminal 150.

Preferably, the heat-resistant polymer film 35 having a metal layer may have a thickness of 0.08 mm or less and a width of 3 mm or less for flexibility and workability of the electrical contact terminal 150.

Preferably, the heat resistant polymer film 35 having the metal layer may be a flexible laminated substrate (FCCL) capable of soldering.

Preferably, the heat-resistant polymer film 35 is polyimide, and the metal layer may be formed by plating one of tin, silver, or gold on the outside of the copper with copper as a main component.

Preferably, the electrical resistance of the heat resistant polymer film 35 having the metal layer is 0.1 ohm or less and soldering is possible.

According to this structure, the heat-resistant polymer film 35 or the metal foil on which the metal layer is formed is thin and relatively wide, so that the flexibility is good and the elasticity and the restoring force of the electrical contact terminal 150 are not significantly affected.

In addition, since the heat-resistant polymer film 35 on which the metal layer is formed is wound obliquely diagonally on the elastic rubber coating layer 20 with a constant insulation interval by the lateral winding, the flexibility is good and it is easy to manufacture even a product having a small dimension.

Moreover, since the width | variety of the heat resistant polymer film 35 and metal foil in which the metal layer was formed is much wider than the metal wire 30 of a single wire | line, working speed is fast.

In addition, the surface of the heat resistant polymer film 35 and metal foil in which the metal layer was formed is smooth, and vacuum pick-up is easy.

However, the present invention is not limited thereto, and although not shown in FIG. 6, a heat-resistant polymer film having a metal layer coated with a heat-resistant elastic rubber adhesive 21 serving as an elastic rubber coating layer 20 on the elastic rubber 10 ( 35) or metal foil can be wound in succession. In this case, the electrical contact terminal 150 is not the elastic rubber coating layer 20 is formed on the entire outer surface of the elastic rubber 10, the heat-resistant elastic rubber adhesive only on the back surface of the heat-resistant polymer film 35 or metal foil having a metal layer formed 21 is formed to serve as the elastic rubber coating layer (20).

At this time, the elastic rubber adhesive 21 is not bonded by thermal curing like the elastic rubber coating layer 20, but satisfies the soldering conditions, while maintaining the adhesive force before and after soldering, and also has elasticity and flexibility, elastic rubber coating layer It serves as (20).

Preferably, the elastic rubber adhesive 21 may have a thickness of 0.02 to 0.08 mm, and may be a heat resistant silicone rubber adhesive.

According to this structure, since the elastic rubber coating layer 20 is not formed on the elastic rubber 10, work is convenient, productivity is good, and reliable electrical contact is provided.

In addition to this structure, after placing the metal sheet of the heat-resistant support 40 on the back surface of the elastic rubber 10, the heat-resistant polymer film 35 formed with a metal layer coated with the elastic rubber adhesive 21 can be continuously inclined. have.

According to this structure, the electrical contact terminal has better soldering strength by the metal sheet and the reflow soldering yield is good.

In the forming method, the heat-resistant polymer film 35 or the metal foil having the metal layer formed thereon is inclinedly wound on the elastic rubber coating layer 20, or the heat-resistant metal layer having the heat-resistant elastic rubber adhesive 21 coated thereon is formed on the elastic rubber 10. The polymer film 35 or the metal foil is wound obliquely.

At this time, since the heat resistant polymer film 35 or the metal foil having a relatively wide metal layer is wound compared to the metal wire 30, a part of the heat resistant polymer film 35 is periodically wrinkled during the winding process, but the heat resistant polymer film Since the thickness of is relatively thin, it is manufactured while minimizing wrinkles while passing through a certain jig.

7. Seventh embodiment

7 illustrates an electrical contact terminal 160 according to a seventh embodiment of the present invention.

Referring to FIG. 7, the heat-resistant polymer film 35 or the metal foil having the metal layer coated with the elastic rubber adhesive 21 is continuously wound on the elastic rubber 11 filled therein at a predetermined inclination angle to be adhered thereto.

Preferably, the elastic rubber 11 is a non-foamed insulating elastic rubber, the hardness is Shore A 50 to 80, the width and height of the elastic rubber 11 is a relatively small product of 3mm or less.

Preferably, a part of the back surface and the surface of the elastic rubber 11 is planar and easy to reflow soldering.

Preferably, the width of the heat resistant polymer film 35 having the metal layer coated with the elastic rubber adhesive 21 is within 1.5 mm and the thickness is within 0.04 mm.

By such a structure, since the elastic rubber 11 filled in the inside and having a high hardness has a high pressing force and a good restoring force, the electrical contact terminal 160 can provide a fast elastic restoring force.

However, the present invention is not limited thereto, and although not shown in FIG. 7, in addition to such a structure, the metal layer coated with the elastic rubber adhesive 21 is disposed after the metal sheet, which is a heat-resistant support, is placed on the rear surface of the elastic rubber 11. The formed heat resistant polymer film 35 may be wound.

According to this structure, the electrical contact terminal has better soldering strength by the metal sheet and the reflow soldering yield is good.

The formation method is the same as in the sixth embodiment described above.

8. Eighth Embodiment

8 shows an electrical contact terminal 170 according to an eighth embodiment of the present invention.

Referring to FIG. 8, an electrically conductive elastic rubber coating layer 22 is further bonded to surround the heat resistant polymer film 35 on which the elastic rubber 11 of the electrical contact terminal 170 and the metal layer wound on the slant are formed.

Here, as described above, metal foil may be used instead of the heat-resistant polymer film 35 in which the metal layer is formed.

Preferably, the material of the elastic rubber coating layer 22 may be an electrically conductive silicone rubber, the elastic rubber adhesive 21 may be coated on the inner surface.

According to this structure, the elastic contact 11 provides elastic force, restoring force, and flexibility to the electrical contact terminal 100 by the heat-resistant polymer film 35 on which the metal layer wound on the elastic rubber 11 is formed.

In addition, the elastic rubber coating layer 22 constituting the outer surface of the electrical contact terminal 170 is in elastic and mechanical contact with the opposing object.

In addition, the vacuum pickup is easy by the elastic rubber coating layer 22 having a smooth surface formed on the outer surface of the electrical contact terminal 170.

Here, the elastic rubber adhesive 21 is not interposed between the heat resistant polymer film 35 and the elastic rubber 11 on which the metal layer is formed, and may be fixed by the elastic rubber coating layer 22 surrounding them.

9. Ninth Embodiment

9 illustrates an electrical contact terminal 180 according to a ninth embodiment of the present invention.

Referring to FIG. 9, after the metal sheet, which is the heat-resistant support 40, is placed on the rear surface of the elastic rubber 11, the metal sheet is wound side-by-side with the heat-resistant polymer film 35 having the metal layer formed thereon, and then, both sides of the electrical contact terminal 170 are formed. The electrically conductive elastic rubber coating layer 22 is further bonded to surround the heat resistant polymer film 35 on which the elastic rubber 11 and the metal layer wound obliquely on the surface are formed.

Here, as described above, metal foil may be used instead of the heat-resistant polymer film 35 in which the metal layer is formed.

Preferably, the material of the elastic rubber coating layer 22 may be an electrically conductive silicone rubber, the elastic rubber adhesive 21 may be coated on the inner surface.

According to this structure, the metal sheet, which is the heat-resistant support 40 provided on the rear surface of the elastic rubber 11, has a better soldering strength and a good reflow soldering yield.

In addition, the elastic rubber coating layer 22 serves to more stably bond the heat resistant polymer film 35 having the metal layer to the elastic rubber 11 and to protect it from the outside.

In addition, the vacuum pickup is facilitated by the elastic rubber coating layer 22 having a smooth surface formed on the surface of the electrical contact terminal 170.

In addition, the elastic rubber coating layer 22 is not formed on the rear surface of the electrical contact terminal 170, and the heat resistant support 40 can be soldered by placing a metal sheet.

As described above, the elastic rubber adhesive 21 may not be interposed between the heat resistant polymer film 35 and the elastic rubber 11 on which the metal layer is formed, and may be fixed by the elastic rubber coating layer 22.

Hereinafter, the manufacturing method will be described.

After preparing the elastic rubber 11 having a constant volume and having a flat surface on the back and a part of the surface in a reel state, the heat resistant support 40 of the metal sheet is placed on the back surface of the elastic rubber 11, and the heat resistant metal layer is formed by using a transverse winding machine. The polymer film 35 is wound sideways with an oblique inclination.

Subsequently, the liquid conductive silicone rubber is dipped and coated only on the heat-resistant polymer film 35 on which the elastic rubber 11 and the metal layer are formed on both the surface and both sides thereof. Do not allow silicone rubber to be coated.

Thereafter, the liquid silicone rubber liquid is thermally cured.

Thereafter, it is cut to an appropriate length and then reel packed by vacuum pickup.

Although the above has been described with reference to the embodiments of the present invention, various changes or modifications can be made at the level of those skilled in the art.

For example, although not described in an embodiment of the present invention, the electrical contact terminal 100 having a structure according to the first embodiment of the present invention may further have a structure of the second to ninth embodiments of the present invention. Several embodiments may be constructed by assembling at the same time.

Such changes and modifications may belong to the present invention without departing from the scope of the present invention. It is intended that the scope of the invention be determined by the claims set forth below.

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

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

3 shows an electrical contact terminal according to a third embodiment of the present invention.

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

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

6 shows an electrical contact terminal according to a sixth embodiment of the present invention.

7 shows an electrical contact terminal according to a seventh embodiment of the present invention.

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

9 shows an electrical contact terminal according to a ninth embodiment of the present invention.

Claims (18)

Elastic rubber having a constant volume; An elastic rubber coating layer covering and covering the entire outer surface of the elastic rubber; And And a flexible metal member wound around the outer surface of the elastic rubber coating layer in a continuous line with a predetermined insulation interval and bonded to the elastic rubber coating layer, The solderable elastic electrical contact terminal is soldered by the metal member, and has elasticity by the elastic rubber and the elastic rubber coating layer. delete delete The method according to claim 1, Solderable elastic electrical contact terminal is interposed between the back surface of the elastic rubber coating layer and the metal member, or a heat resistant film is interposed between the surface of the elastic rubber coating layer and the metal member. delete The method according to claim 4, The heat-resistant support is a solderable elastic electrical contact terminal, characterized in that the metal sheet. The method according to claim 1, The elastic rubber is solderable elastic electrical contact terminal, characterized in that the insulating non-foaming silicone rubber. The method according to claim 1, The elastic rubber coating layer is any one of an electrically conductive or electrically non-conductive silicone rubber or a solderable electrical contact terminal, characterized in that the heat-resistant elastic rubber adhesive. The method according to claim 1, The metal member may be any one of a circular soft metal wire, a heat-resistant polymer film having a metal layer, or a metal foil. The method according to claim 1, Solderable elastic electrical contact terminal, characterized in that the electrically conductive elastic rubber coating layer is further bonded to cover the part or all of the elastic rubber coating layer and the metal member. delete The method according to claim 1, The outer surface of the metal member is solderable elastic electrical contact terminal, characterized in that plated by any one of tin, silver or gold. delete The method according to claim 1, The metal member is a solderable electrical contact terminal, characterized in that the metal wire pair consisting of a plurality of strands. The method according to claim 1, And the metal member is wound by a spiral winding. The method according to claim 4, When the solderable heat resistant support is interposed between the back surface of the elastic rubber coating layer and the metal member, the electrically conductive elastic rubber coating layer is further bonded to cover a portion where the heat resistant support is not interposed. Electrical contact terminal. delete The method according to claim 1, And at least a portion of the surface of the elastic rubber forms a horizontal plane and is surface mounted by a vacuum pickup on the horizontal plane.

Images