CN111200195A - Elastic electric contact terminal - Google Patents
Elastic electric contact terminal Download PDFInfo
- Publication number
- CN111200195A CN111200195A CN201911139452.7A CN201911139452A CN111200195A CN 111200195 A CN111200195 A CN 111200195A CN 201911139452 A CN201911139452 A CN 201911139452A CN 111200195 A CN111200195 A CN 111200195A
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- China
- Prior art keywords
- core
- elastic
- contact terminal
- electric contact
- foamed
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/50—Fixed connections
- H01R12/51—Fixed connections for rigid printed circuits or like structures
- H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
- H01R12/57—Fixed connections for rigid printed circuits or like structures characterised by the terminals surface mounting terminals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
- H01R4/029—Welded connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/04—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation using electrically conductive adhesives
Landscapes
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Abstract
Disclosed is an elastic electric contact terminal having an increased operating distance, a small pressing force, and an excellent elastic restoring force. The electric contact terminal includes: a tube constructed of a non-foamed elastomeric rubber; a polymer film which is stuck to the outside of the pipe with an adhesive interposed therebetween and has a metal layer formed on an externally exposed surface; and a foam core that fills at least a part of the receiving space of the tube and is adhered to a sidewall of the receiving space, the foam core being made of an elastic rubber having an open cell structure.
Description
Technical Field
The present invention relates to an electrical contact terminal, and more particularly, to an electrical contact terminal having a small pressing force, a long operating distance, an excellent elastic restoring force, heat resistance, and stability in reflow soldering by vacuum pickup.
Background
In general, the elastic electric contact terminal is preferably an elastic electric contact terminal as follows: the electrical conductivity and elasticity are good, the operating distance is large, the elastic restoring force is excellent, and the reflow soldering by the vacuum pickup is easy to perform, so that it can be applied to mass production.
The electric contact terminal disclosed in korean patent laid-open publication No. 1001354, which was filed by the present applicant, has elasticity by means of an insulating elastic core having a tube shape with a through hole formed therein, thereby having an elastic restoring force. Also, there are advantages in that vacuum pickup can be achieved and reflow soldering can be achieved.
The elastic core used herein is economically provided continuously with various shapes in cross section by means of an extrusion process and hardening.
However, the above patent has the following problems: since the core is made of a rubber material and is a non-foamed material, when the tube is left to stand at a high temperature for a long time, the performance is degraded due to the deterioration of the rubber, and when the tube is left to stand at a high temperature for a long time in a pressed state and then the pressing force is released, the elastic recovery rate of the performance as the core is restored to the original height is lowered.
In other words, there are the following disadvantages: the electric contact terminal mainly determines a pressing force and a recovery rate by the thickness of the non-foamed rubber constituting both side walls of the core, but if the thickness is made thin in order to reduce the pressing force, the elastic recovery rate becomes poor after standing at a high temperature, and if the thickness is made thick, the elastic recovery rate becomes good, but the pressing force becomes large and the operation distance that can be pressed in the height direction becomes small.
For example, there are the following disadvantages: when a core having a through hole of a normal size is pressed by about 30% of the original height of the core and left in an oven at 125 ℃ for about 1000 hours, and then the pressing force is released, it is difficult to return to 90% or more of the original height.
Further, the elastic recoil force of the core is large relative to the recovery rate, and there is a disadvantage that a large force is applied to the opposed object.
According to another conventional technique, an elastic rubber core having a through hole is replaced with a foamed elastic rubber Sponge (Sponge) having a large number of pores and having heat resistance suitable for a welding temperature.
The electric contact terminal formed of such a sponge has advantages in that a pressing force, an operating distance, and an elastic recovery rate are determined according to a foaming rate of rubber, and thus a small pressing force is generally required, the operating distance is long, and the elastic recovery rate is excellent.
However, such sponges have the following disadvantages: it is difficult to have various sectional shapes in precise sizes and to manufacture continuously and economically in a roll state.
In other words, since the rubber material foams and hardens in the open free space to become the sponge of the final shape, there are disadvantages in that it is difficult to precisely continuously manufacture the sponge having a cross section of a desired shape and the manufacturing equipment is expensive.
In particular, there is a disadvantage that it is difficult to provide the shape of the sponge having an open cell structure in which many pores are formed for a small pressing force and an excellent recovery rate as a shape that is less shaken or warped by the molten solder when soldering.
Also, there are disadvantages as follows: when the electrically conductive film is bonded while covering the sponge with a liquid adhesive interposed therebetween, the liquid adhesive penetrates into the pores constituting the open cells, and a large amount of the adhesive is finally used, and the adhesive penetrating into the pores blocks part of the pores, so that the hardness of the sponge finally increases, and a large material cost is required, and it is difficult to provide reliable quality.
Also, there are disadvantages as follows: when the electric contact terminal made of the sponge is continuously manufactured in a roll state, since the sponge is easily stretched, it is difficult to manufacture the electric contact terminal.
Also, there are disadvantages as follows: the weight of the sponge is light with respect to the volume, so that the phenomenon of shaking or warping is severe at the time of reflow soldering, and it is difficult to stably provide reflow soldering.
In particular, the following disadvantages exist: with a high height relative to width and length, it is difficult to provide a stable reflow soldering.
According to still another prior art, a battery interference (EMI) foam pad is disclosed in which a Hot melt adhesive (Hot melt adhesive) is sandwiched between a polyurethane sponge (Urethane sponge) or a silicone sponge and is wrapped with conductive fibers.
Such a pad has the following disadvantages: although such a pad is easy to use for an object to be placed against, such as an instrument, it is difficult to provide a sponge having various shapes, and it is difficult to use the hot melt adhesive for high temperature applications such as vehicles because the hot melt adhesive has a low heat resistance temperature and melts at a high temperature.
Disclosure of Invention
Accordingly, an object of the present invention is to provide a solderable electric contact terminal having excellent elastic restoring force even if the pressing force is released after being pressed at high temperature for a long time
Another object of the present invention is to provide an electrical contact terminal requiring less pressing force and having a long operating distance and being stable in reflow soldering by means of vacuum pickup.
Another object of the present invention is to provide an economical electric contact terminal provided with both an elastic body having open cell-shaped pores on a cut surface and an elastic body having no pores.
Another object of the present invention is to provide an electric contact terminal capable of variously and easily providing a pressing force and an operating distance and a recovery rate.
Another object of the present invention is to provide an electric contact terminal that is easy to use at high temperatures.
According to a first aspect of the present invention, there is provided an elastic electric contact terminal, comprising: a tube constructed of a non-foamed elastomeric rubber; a polymer film which is stuck to the outside of the pipe with an adhesive interposed therebetween and has a metal layer formed on an externally exposed surface; and a foam core that fills at least a part of the receiving space of the tube and is attached to a sidewall of the receiving space, the foam core being formed of an elastic rubber having an open cell structure, wherein an elastic recovery rate of the foam core is greater than an elastic recovery rate of the tube.
Preferably, the compression force of the foam core may be smaller than the compression force of the tube.
Preferably, the liquid rubber corresponding to the foam core is injected into the receiving space, foamed and then hardened to form the foam core, so that the foam core is adhered to the side wall of the receiving space by self-adhesion.
Preferably, a cutting portion cutting a wall portion of the tube in a length direction of the tube may be formed, and the cutting portion may be covered with the adhesive.
According to another aspect of the present invention, there is provided an electric contact terminal, comprising: a core layer laminate including a non-foamed elastic core for maintaining a shape and a foamed core for elastic recovery laminated on an upper surface of the non-foamed elastic core; and a polymer film adhered to an outer surface of the tube with an adhesive interposed therebetween and having a metal layer formed on an outer exposed surface, wherein an elastic recovery rate of the foam core is greater than an elastic recovery rate of the tube, and the foam core has an open cell structure.
Preferably, the non-foamed elastic core and the foamed core may be pasted by sandwiching an adhesive.
Preferably, the height of the non-foamed elastic core may be lower than the height of the foamed core.
Preferably, the cross-sectional shape of the upper corner of the foam core may be smoothed by the step of coating the core laminate while pulling the polymer film.
Preferably, air holes are exposed to the outside at both cut surfaces of the foam core exposed to the outside, and air maintains a flow between the one cut surface and the other cut surface, and a main shape of the air holes may be an elongated shape having a dimension in a height direction larger than a dimension in a width direction, and more preferably, the elongated air holes may be 60% or more of the entire air holes exposed.
Preferably, the total area of the cut surfaces at both ends of the non-foamed elastic core may be smaller than the total area of the cut surfaces at both ends of the foamed core.
Preferably, the non-foamed elastic core may be provided with: an upper surface bent downward from both ends toward the center; and a lower surface formed to be inclined from both ends toward the center and recessed.
According to the above configuration, when the foam core is placed at a high temperature for a long time in a state of being pressed and compressed between objects and then the pressing is released, the elastic recovery of the electric contact terminal is excellent due to the open cell structure.
In particular, when the electric contact terminal is pressed in a height direction, the foam core may easily discharge air through the air holes of the foam core using an open cell structure in which the air holes are exposed at both side cutting surfaces, so that it may be pressed more with a small force, and when the force is released, an elastic recovery rate is good since the air flows into the air holes.
Further, the foam core, which is disposed at the upper portion and has many pores formed therein, requires a small pressing force and has a large operation distance.
Further, the non-foamed elastic core positioned at the lower portion is heavier than the foamed core positioned at the upper portion by applying the core laminate, and the lower surface of the non-foamed elastic core is formed in a shape recessed toward the center, so that the vibration caused by the wind supplied at the time of reflow soldering is finally reduced, thereby providing stable reflow soldering.
Further, the shape of the upper corner can be easily formed into a curved surface by deforming the upper foam core while maintaining the shape of the lower non-foam elastic core.
Further, the shape and ratio of the non-foamed elastic core and the foamed core are adjusted, so that the elastic recovery rate, the pressing force, and the operating distance suitable for the application can be easily adjusted.
Further, after the cutting portion is formed by the tube having the various sectional shapes, the foam core is formed in the inner space by the cutting portion, so that the foam core having the various shapes can be provided relatively easily and economically.
And, an electrically conductive adhesive tape is adhered to the metal layer under the elastic electric contact terminal, thereby being adhered to an opposite object to be used at a high temperature.
Drawings
Fig. 1 shows an electrical contact terminal according to an embodiment of the present invention.
Fig. 2 is an actual photographic image of a foam core suitable for use in this example.
Fig. 3 shows an electrical contact terminal according to another embodiment of the present invention.
Description of the symbols
100: electrical contact terminal
110: pipe
111: cutting site
113: accommodating groove
120: polymer film
130: metal layer
140: foaming core
142: air hole
Detailed Description
The technical terms used in the present invention are used for the purpose of describing specific embodiments only, and it is to be noted that the present invention is not limited thereto. Also, technical terms used in the present invention should be interpreted as having meanings commonly understood by those having basic knowledge in the technical field to which the present invention belongs without other specific definitions, and should not be interpreted as having an excessively generalized meaning or an excessively reduced meaning. In addition, when the technical terms used in the present invention are erroneous technical terms that do not accurately express the idea of the present invention, they should be understood instead of technical terms that can be accurately understood by those skilled in the art. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Fig. 1 shows an electrical contact terminal according to an embodiment of the present invention.
The electric contact terminal 100 is interposed between an opposing object, for example, a circuit substrate and an electrically conductive case (case), so as to be contacted in a manner of sufficiently receiving a mechanical high tolerance of the object, and finally, the objects can be electrically and mechanically contacted.
Preferably, the electric contact terminal 100 may be soldered to the conductive pattern of the circuit substrate by solder, but may be inserted into a slot of an object for use as needed.
The electric contact terminal 100 is roll-packaged to a carrier and enables reflow soldering performed by vacuum pickup.
In the electric contact terminal 100, the adhesive 114 is interposed on the outer surface of the non-foamed elastic rubber tube 110 to bond the polymer film 120, both ends of the polymer film 120 are spaced apart from each other at a predetermined interval under the tube 110, and the metal layer 130 is formed on the outer surface of the polymer film 120, and these have heat resistance against reflow soldering by solder.
Here, the adhesive 114 may be a silicon rubber adhesive having elasticity, the polymer film 120 may be Polyimide (PI) having heat resistance, and the metal layer 130 may be a copper foil or a copper plating layer plated with nickel, tin, gold, or the like.
The tube 110 forms a space inside thereof, and the inside space is filled with the foaming core 140.
The foam core 140 may be a foamed silicone rubber having an open cell structure of heat resistance and elasticity.
As described later, the foam core 140 may be formed by: the polymer in a liquid state is injected into the inner space of the tube 110 to be foamed and hardened.
According to the present invention, the elastic restoring force of the foam core 140 is mainly formed by the air holes 142 of the open cell structure formed inside the foam core 140, and the elastic restoring force of the tube 110 is mainly formed by the shape of the tube 110, however, it is preferable that the elastic restoring force of the foam core 140 is greater than that of the tube 110.
As an example, the elastic recovery of the foamed core 140 may be greater than the elastic recovery of the tube 110 when compressed by 30% on a height basis during 1000 hours in an oven at 125 ℃.
Further, according to the present invention, the compression force of the tube 110 is greater than that of the foam core 140, and for example, when the compression is 30% based on the height, the compression force of the tube 110 is preferably greater than that of the foam core 140.
The lower surface of the electric contact terminal 100 is depressed toward the center so as to provide stability when reflow-soldering, and the upper surface is smooth and stronger than the strength of the foaming core 140 so that the high polymer film 120 is less wrinkled and is easily vacuum-picked up.
In order to increase the operating distance of the electric contact terminal 100 under the condition that the outer diameter of the tube 110 is the same, the sectional area of the space for accommodating the foam core 140 needs to be increased.
In one embodiment, the foam core 140 completely fills the inner space of the tube 110, but the invention is not limited thereto, and only a part of the inner space may be filled in the height direction.
The electric contact terminal 100 according to an embodiment has the following advantages: when compressed by being pressed against an object, the required compression force as the pressing force is reduced by the foam core 140 having a thinner wall thickness and a larger number of air holes 142 than when only the foam core is made of a non-foamed rubber material having a thicker wall thickness. As a result, the electric contact terminal 100 can be pressed more with the same force, thereby increasing the operating distance, and when the pressing force is released after the pressing, the recovery can be made more excellent by the foam core 140.
The foaming core 140 is exposed with air holes 142 of an open cell structure at both side cutting surfaces, and maintains the flow of air between the one side cutting surface and the other side cutting surface. Therefore, the following advantages are provided: since air can be easily discharged through the air holes of the foaming core 140 exposed to both side cutting surfaces when the electric contact terminal 100 is pressed in the height direction, it can be pressed much with a small force, and the recovery rate is increased by the air holes 142, and the pressed distance is easily increased.
Fig. 2 is an actual photographic image of a foam core suitable for use in this example.
The air holes 142 exposed to both side cutting surfaces are formed in a shape having a dimension in the height direction larger than that in the width direction, and thus are provided in a shape that is long in the height direction.
Although not all of the air holes 142 are long in the height direction, the air holes of the long shape in the height direction may be, for example, 60% or more of the entire air holes 142.
The more the air holes having such a shape long in the height direction, the more the pressing in the height direction with a small force becomes possible, and when the pressing force is released, the better the restoring force in the height direction is, the better the restoration force is, and the electrical and mechanical contact with the facing object can be made softly.
The larger the number of the cells 142 of the foaming core 140 and the larger the size of the cells 142, the more can be pressed with a small force, and preferably, the foaming ratio of the foaming core 140 is, for example, 50% or more.
The foaming core 140 is formed of an elastic rubber such as silicon rubber capable of coping with a welding temperature, and the foaming core 140 may be formed by injecting a polymer in a liquid state into a space inside the tube 110 to be foamed and hardened.
For this, the cutting portion 111 for injecting the polymer in the liquid state is formed in the length direction of the tube 110 when viewed from a vertical section, and the cutting portion 111 may be formed during the extrusion of the tube 110, or may be formed by cutting the wall portion of the tube 110 with a blade or the like at a point of time when the extrusion is finished.
In one embodiment, the cutting portions 111 are formed at the portions of the lower surface of the tube 110 that are spaced apart from the ends of the polymer film 120, but the present invention is not limited thereto.
In the case where the cut portion is formed by cutting the wall portion of the tube 110 without the portions of the both ends of the polymer film 120, after the liquid polymer is injected into the space to form the foaming core 140, the cut portion is covered by the adhesive 114, and as a result, there is an advantage in that the cut portion is not easily opened when welding.
If the liquid polymer foams in the inner space of the tube 110 to form the foam core 140, the liquid polymer foams and hardens to adhere to the sidewall of the space. As a result, since the foam core 140 is also stuck to the cut part 111 that is opened, at least a part thereof can be fixed after the sticking so that the cut part 111 is not opened after the sticking.
Therefore, at least a part of the cutting portion 111 which is spread at the time of the reflow soldering thereafter is not spread again, for example, a phenomenon that the cutting portion 111 is spread to spread or warp the tube 110 at the time of the reflow soldering is prevented, so that quality with reliability of soldering can be provided.
In contrast, the cutting portion 111 is coated with an adhesive from the outside of the cutting portion 111 so that the adhesive fills the cutting portion 111 to be bonded, whereby the cutting portion may not be spread.
After a liquid polymer is injected into an inner space of the pipe 110, in which the cutting portion 111 is formed, continuously supplied in a roll form through the cutting portion 111 to be foamed, thereby continuously forming the foamed core 140, an adhesive is interposed on an outer surface of the pipe 110, and the outer surface is coated and bonded with the polymer film 120.
Thereafter, the electric contact terminal 100 is cut at a predetermined length to be manufactured.
After the manufacturing process, the foam core 140 having the open cell structure of the open cell structure exposed on the inner side of the cut surfaces on both sides of the electric contact terminal 100 is observed, and the foam core 140 is covered with the non-foam rubber tube 110 forming the closed loop on the outer side.
Fig. 3 shows an electrical contact terminal according to another embodiment of the present invention.
In the electric contact terminal 300 according to an embodiment, the foamed core 340 is laminated on the non-foamed elastic core 310 with the rubber adhesive 316 interposed therebetween to form a laminated body, and the polymer film 320 having the metal layer 330 formed on the outer surface thereof is coated with the rubber adhesive 315 interposed therebetween to cover the laminated body, thereby forming the electric contact terminal 300.
In this embodiment, a laminated dual core, i.e., a non-foamed elastic core 310 and a foamed core 340 is applied, wherein the non-foamed elastic core 310 at the lower portion is mainly used for the purpose of maintaining the overall shape and providing a structure easy for reflow soldering, and the foamed core 340 at the upper portion is mainly used for the purpose of pressing force, operating distance, and elastic recovery.
Although the case where the non-foamed elastic core 310 and the foamed core 340 are bonded with the adhesive 316 is exemplified, the non-foamed elastic core and the foamed core may be laminated using an adhesive in a case where the non-foamed elastic core and the foamed core are not high quality or are long in length at low cost.
As in the embodiment of fig. 3, the upper corner portions of the foam core 340 constitute a rounded curve, at least a plane enabling vacuum pickup is provided at the upper portion, and the material of the foam core 340 may be foam rubber including silicon capable of coping with a welding temperature.
For the non-foamed elastic core 310, the lower face is depressed from both sides toward the center to provide stability when reflow-welded, and the upper face is bent toward the center side to support the foamed core 340 snugly, but not limited thereto.
The non-foamed elastic core 310 is a non-foamed heat-resistant elastic rubber, which may be, for example, a silicone rubber, and may be provided with appropriate mechanical strength and elasticity.
It is preferable that the height of the non-foamed elastic core 310 is made lower than that of the foamed core 340 so that a small force is applied to an opposite object by a small compression force, a long operation distance, and a good elastic restoring force of the foamed core 340, and a pitch for which a tolerance is large can be used, and a high restoring rate, for example, a restoring rate of 90% or more can be achieved.
Also, it is preferable that the area of the cut surfaces at both ends in the longitudinal direction of the non-foamed elastic core 310 is made smaller than the area of the cut surfaces at both ends in the longitudinal direction of the foamed core 340, so that the above-described effects can be obtained.
Also, preferably, the maximum width of the non-foamed elastic core 310 may be wider than the maximum width of the foamed core 340.
For such an effect, it is preferable that the elastic recovery rate of the foaming core 340 is greater than that of the non-foaming elastic core 310, and the compression force of the non-foaming elastic core 310 is greater than that of the foaming core 340.
For example, when the foamed core 340 is compressed by 30% based on the height in an oven at 125 ℃ for 1000 hours, the elastic recovery rate of the foamed core 340 may be greater than that of the non-foamed elastic core 310, and when the foamed core is compressed by 30% based on the height, the compression force of the non-foamed elastic core 310 may be greater than that of the foamed core 340.
A foamed core 340 having a quadrangular cross-sectional shape is laminated on a non-foamed elastic core 310 having an upper surface curved downward from both sides toward the center side with an adhesive 316 interposed therebetween to form a laminate, and then the laminate is coated and bonded with a polymer film 320 with an adhesive 315 interposed therebetween.
At this time, since the non-foamed elastic core 310 having a mechanical strength greater than that of the foamed core 340 acts as a support base for maintaining the shape by being wrapped while being pulled, the cross-sectional shape of the foamed core 340 having a low compression force is easily deformed into a substantially half-moon shape or corners are smoothly deformed, and the foamed core 340 is closely attached to the curved upper surface of the non-foamed elastic core 310.
Thereafter, the adhesive 315 is hardened and cut to a predetermined length to manufacture the electric contact terminal 300.
In the above embodiment, an electrically conductive adhesive tape, not shown, may be attached to the metal layer 130 on the lower surface of the electric contact terminal 100, and in this case, in addition to the above advantages, there is an advantage that it can be used by being attached to an instrument.
Although the embodiments of the present invention have been described above mainly, it is obvious that various modifications can be made by those skilled in the art. Therefore, the scope of the claims of the present invention should be construed not as limited to the above-described embodiments but as defined by the scope of the claims.
Claims (20)
1. An elastic electric contact terminal, comprising:
a tube constructed of a non-foamed elastomeric rubber;
a polymer film which is stuck to the outside of the pipe with an adhesive interposed therebetween and has a metal layer formed on an externally exposed surface; and
a foam core that fills at least a part of the receiving space of the tube and is bonded to a sidewall of the receiving space, the foam core being made of an elastic rubber having an open cell structure,
wherein the foam core has an elastic recovery rate greater than that of the tube.
2. The elastic electric contact terminal according to claim 1,
the foam core has a compressive force less than the compressive force of the tube.
3. The elastic electric contact terminal according to claim 2,
the foam core has a greater elastic recovery than the tube when compressed by 30% on a height basis in an oven at 125 ℃ for 1000 hours,
the foamed core has a compressive force less than the compressive force of the tube when compressed by 30% on a height basis.
4. The elastic electric contact terminal according to claim 1,
and liquid rubber corresponding to the foaming core is injected into the accommodating space, is foamed and then is hardened to form the foaming core, so that the foaming core is adhered to the side wall of the accommodating space by virtue of self-adhesion.
5. The elastic electric contact terminal according to claim 1,
a cutting portion is formed to cut a wall portion of the tube in a longitudinal direction of the tube.
6. The elastic electric contact terminal according to claim 5,
the cutting site is covered by the adhesive.
7. The elastic electric contact terminal according to claim 1,
the tube, the foam core, and the adhesive are silicone rubber.
8. An elastic electric contact terminal, comprising:
a core layer laminate including a non-foamed elastic core for maintaining a shape and a foamed core for elastic recovery laminated on an upper surface of the non-foamed elastic core; and
a polymer film adhered to an outer face of the tube with an adhesive interposed therebetween and having a metal layer formed on an externally exposed face,
wherein the foam core has an elastic recovery rate greater than that of the tube,
the foam core has an open cell structure.
9. The elastic electric contact terminal according to claim 8,
the foam core has a compressive force less than the compressive force of the tube.
10. The elastic electric contact terminal according to claim 9,
the foam core has a greater elastic recovery than the tube when compressed by 30% on a height basis in an oven at 125 ℃ for 1000 hours,
the foamed core has a compressive force less than the compressive force of the tube when compressed by 30% on a height basis.
11. The elastic electric contact terminal according to claim 8,
the non-foamed elastic core and the foamed core are bonded by interposing an adhesive therebetween.
12. The elastic electric contact terminal according to claim 8,
the height of the non-foamed elastic core is low compared to the height of the foamed core.
13. The elastic electric contact terminal according to claim 8,
the polymer film is pulled and the core laminate is wrapped, whereby the cross-sectional shape of the upper corner of the foam core is smoothed.
14. The elastic electric contact terminal according to claim 8,
at both cut surfaces of the foam core exposed to the outside, air holes are exposed to the outside, and air maintains flow between the one cut surface and the other cut surface.
15. The elastic electric contact terminal of claim 14,
the air hole has a main shape of a slender shape having a dimension in the height direction larger than a dimension in the width direction.
16. The elastic electric contact terminal of claim 15,
the elongated pores are more than 60% of the entire pores exposed.
17. The elastic electric contact terminal according to claim 8,
the total area of the cut surfaces at both ends of the non-foamed elastic core is smaller than the total area of the cut surfaces at both ends of the foamed core.
18. The elastic electric contact terminal according to claim 8,
the non-foamed elastic core, the foamed core, and the adhesive are silicone rubber.
19. The elastic electric contact terminal according to claim 8,
the non-foamed elastic core is provided with: an upper surface bent downward from both ends toward the center; and a lower surface formed to be inclined from both ends toward the center and recessed.
20. The elastic electric contact terminal of claim 1 or 8,
there is a spaced-apart distance of the polymer films below the elastic electric contact terminals, and a plane for vacuum pickup is provided above, so that reflow soldering performed by means of vacuum pickup can be achieved.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20180143709 | 2018-11-20 | ||
| KR10-2018-0143709 | 2018-11-20 | ||
| KR10-2019-0142529 | 2019-11-08 | ||
| KR1020190142529A KR102331990B1 (en) | 2018-11-20 | 2019-11-08 | Elastic electric contact terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111200195A true CN111200195A (en) | 2020-05-26 |
| CN111200195B CN111200195B (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911139452.7A Active CN111200195B (en) | 2018-11-20 | 2019-11-20 | Elastic electric contact terminal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112351666A (en) * | 2020-07-27 | 2021-02-09 | 深圳市卓汉材料技术有限公司 | Wrapped heat-conducting grounding elastic piece and electronic equipment |
| CN113923853A (en) * | 2021-10-22 | 2022-01-11 | 深圳市卓汉材料技术有限公司 | Grounding elastomer and manufacturing method thereof |
| WO2023051055A1 (en) * | 2021-09-29 | 2023-04-06 | 华为技术有限公司 | Connection member and electronic device |
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| JP2008014942A (en) * | 2006-07-03 | 2008-01-24 | Zippertubing (Japan) Ltd | Elastic electric contact terminal which can be soldered |
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| KR20160101624A (en) * | 2015-02-17 | 2016-08-25 | 조인셋 주식회사 | Solderable elastic electric contact terminal |
| CN106159492A (en) * | 2015-05-15 | 2016-11-23 | 卓英社有限公司 | Be suitable to undersized elastic electric contact terminal |
| CN107809012A (en) * | 2016-09-08 | 2018-03-16 | 卓英社有限公司 | It is suitable for the centreless elastic electric contact terminal of low clearance |
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| JPH11233177A (en) * | 1998-02-17 | 1999-08-27 | Keyence Corp | Connecting structure |
| JP2008014942A (en) * | 2006-07-03 | 2008-01-24 | Zippertubing (Japan) Ltd | Elastic electric contact terminal which can be soldered |
| CN101527400A (en) * | 2008-03-07 | 2009-09-09 | 卓英社有限公司 | Solderable elastic electric contact terminal |
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| CN107809012A (en) * | 2016-09-08 | 2018-03-16 | 卓英社有限公司 | It is suitable for the centreless elastic electric contact terminal of low clearance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112351666A (en) * | 2020-07-27 | 2021-02-09 | 深圳市卓汉材料技术有限公司 | Wrapped heat-conducting grounding elastic piece and electronic equipment |
| WO2023051055A1 (en) * | 2021-09-29 | 2023-04-06 | 华为技术有限公司 | Connection member and electronic device |
| CN113923853A (en) * | 2021-10-22 | 2022-01-11 | 深圳市卓汉材料技术有限公司 | Grounding elastomer and manufacturing method thereof |
| CN113923853B (en) * | 2021-10-22 | 2022-07-22 | 深圳市卓汉材料技术有限公司 | Grounding elastomer and manufacturing method thereof |
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| CN111200195B (en) | 2021-06-18 |
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