KR102236798B1 - Elastic electric connect terminal assembly - Google Patents

Abstract

Disclosed is an electrical connection terminal assembly having a structure that is not easily bent due to mechanical stability even when the height is high compared to the width. The electrical connection terminal assembly is composed of an insulating case and an elastic electrical connection terminal accommodated therein and partially exposed to the upper and lower portions thereof, and a fitting bar of the case is inserted into the through hole of the electrical connection terminal to be coupled to the case.

Description

Elastic electric connect terminal assembly

The present invention relates to an elastic electrical connection terminal, and particularly relates to an electrical connection terminal assembly that facilitates reflow soldering even when its height is high compared to its width, has a structure that is stable from external forces after soldering, and is easy to assemble.

In particular, it relates to an electrical connection terminal assembly having a metal layer that is easy to operate independently while reducing interference between adjacent metal layers of an elastic electrical connection terminal.

In general, an elastic electrical connection terminal capable of reflow soldering must have good electrical conductivity, excellent elastic recovery, and be able to withstand soldering temperatures.

As an example of an electrical connection terminal capable of reflow soldering, in Korean Patent No. 1001354 by the present inventor, an insulating elastic heat-resistant rubber core having a through hole formed therein in a longitudinal direction, an insulating heat-resistant rubber core wrapped around the insulating elastic heat-resistant rubber core and adhered to it. A rubber coating layer, and a heat-resistant polymer film bonded to the insulating heat-resistant rubber coating layer so that one side surrounds the insulating heat-resistant rubber coating layer, and a metal layer integrally formed on the other side, wherein the polymer film is the insulation heat-resistant so that both ends are spaced apart from each other. A reflow solderable elastic electrical connection terminal is disclosed, which is bonded to a rubber coating layer, and wherein the lower surfaces of the insulating elastic heat-resistant rubber core are formed to be inclined in a shape that is inclined from both ends in the width direction toward the middle portion.

When these electrical connection terminals are provided with a certain ratio of width and height, they are soldered with only the electrical connection terminals themselves, so that they can elastically contact the object and perform their original functions.

However, if the width and height of the electrical connection terminal is very high compared to the width, for example, in a ratio of 2 mm to 8 mm, if the electrical connection terminal is pressed a lot by the object, the height is too high to bend in the middle. The possibility of bending increases, and as a result, there is a disadvantage in that the role of the electrical connection terminal elastically contacting the object is insufficient.

In addition, there is a disadvantage in that the efficiency of surface mounting is degraded due to large shaking or distortion during reflow soldering by vacuum pickup.

In addition, there is a disadvantage in that physical stability is insufficient after soldering is mounted and that it is easily deformed by an external force.

Another prior art is Gore's US Patent No. 7,129,421. According to this patent, an EMI gasket assembly is disclosed in which a compression hole of an electrically conductive gasket material in which a compression hole is formed and an electrically conductive support layer having a crimp are formed on the underside of the electrically conductive gasket material.

According to this structure, since it is not easy to insert the support layer into the compression hole of the gasket material, assembly properties are poor, and there is a limit to increasing the height using the support layer. In the end, the above problem may occur when the height of the gasket material is increased. .

Accordingly, an object of the present invention is to provide an elastic electrical connection terminal assembly that has a height compared to its width and does not bend or bend easily when an object is pressed.

Another object of the present invention is to provide an elastic electrical connection terminal assembly that has a height compared to its width and is less affected by an external force.

Another object of the present invention is to provide a resilient electrical connection terminal assembly having a high height compared to its width, less interference between adjacent metal layers, and easy to operate independently.

Another object of the present invention is to provide an elastic electrical connection terminal assembly that is easy to assemble and that can be well fixed to a case after assembling.

Another object of the present invention is to provide an elastic electrical connection terminal assembly having a height compared to a width and capable of stably reflow soldering.

The above object is composed of a plastic insulating case with an empty space formed therein, and an elastic electrical connection terminal accommodated in the empty space so that at least an upper portion thereof protrudes to the outside of the case and is exposed, the case extending in the longitudinal direction. A pair of first side plates; A second side plate extending in the width direction by connecting one end of the side plate; And a fitting bar extending in the longitudinal direction from the middle of the width direction of the second side plate, wherein the electrical connection terminals include: a core separated from each other in a vertical direction and having a through hole formed in the longitudinal direction; A polymer film that wraps and adheres the core through an adhesive; And a metal layer formed on the outer surface of the polymer film, wherein the fitting bar is inserted into a lower through hole among the through holes so that the electrical connection terminal is coupled to the case. .

Preferably, the fitting bar has a tapered shape, and the vertical cross-sectional area of the fitting bar may gradually decrease from a portion connected to the second side plate to an end portion.

Preferably, one or more locking jaws may be formed on at least one of the end of the fitting bar or the inner end of the end of the first side plate to prevent the electrical connection terminal from being easily removed by an external force, and the length of the fitting bar May be longer than the length of the through hole.

Desirably, a plurality of the metal layers may be electrically separated to be formed, and the core may be partially cut between the separated metal layers in a vertical direction so that each metal layer may independently move.

Preferably, at least a portion of the upper through hole may be formed to protrude from the upper end of the case, and the lower through hole may be formed not to protrude from the lower end of the case.

Preferably, bent portions are formed in the middle portions of both inner surfaces of the upper through holes among the through holes to elastically absorb the force of the object pressed from the top to be folded.

Preferably, at least one of the first and second side plates of the case and the outer surface of the electrical connection terminal may be bonded to each other through an adhesive.

Preferably, the case is manufactured integrally by injecting the plastic, and the core is exposed to the outside at both ends of the electrical connection terminal in the longitudinal direction, a fixed terminal is formed at the lower end of the case, and the fixed terminal, It may be fixed by being inserted into the object in the form of a pin or soldered to the object in the form of a metal sheet to be fixed.

According to the present invention, since the case supports at least 1/3 of the electrical connection terminal in the height direction and has a height substantially less than 2/3 of the actual height, even when the height is higher than the width, the force exerted by the object is There is little probability that the middle part will bend or bent due to it.

In addition, since at least a part of the upper through hole is located inside the case, the electrical connection terminal is less deformed by external force.

In addition, since the electrical connection terminal can be assembled simply by pushing it from the side of the case, the assembly is good, and since the tapered fitting bar penetrates the inside of the electrical connection terminal, it is stably fixed.

In addition, by partially cutting a portion between adjacent metal layers in a vertical direction, it is possible to operate while reducing interference between metal layers.

In addition, since the electrical connection terminal assembly including the case is reflow soldered to the solder pattern of the circuit board, shaking or distortion during reflow soldering can be reduced.

1 shows an elastic electrical connection terminal assembly according to an embodiment of the present invention.
2 is an exploded perspective view of an elastic electrical connection terminal assembly according to an embodiment of the present invention.
3(a) and 3(b) are vertical cross-sectional views in the width direction and vertical cross-sectional views in the length direction, respectively.
4(a) and 4(b) show a modified example of the case, respectively.

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

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

1 shows an elastic electrical connection terminal assembly according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of an elastic electrical connection terminal assembly according to an embodiment of the present invention, and FIGS. 3(a) and 3(b) are It is a vertical cross-sectional view in the width direction and a vertical cross-sectional view in the length direction, respectively.

As shown in FIG. 1, the electrical connection terminal assembly includes an insulating case 200 having an empty space formed therein, and an elastic electrical connection terminal 100 that is accommodated in the empty space and partially exposed to the upper and lower portions.

The height Ht of the electrical connection terminal 100 is considerably larger than the width W, and the height of the case 200 may be 1/3 or more of the height of the electrical connection terminal 100. In addition, the height of the electrical connection terminal 100 protruding to the upper end of the case 200 may be three times or more higher than the height protruding to the lower end of the case 200.

The electrical connection terminal 100 and the case 200 have heat resistance corresponding to soldering, and the case 200 is manufactured integrally by injecting plastic, and the core 110 at both ends in the length direction of the electrical connection terminal 100 Is exposed to the outside.

The electrical connection terminal assembly may be interposed between a circuit board and an electrically conductive object to electrically connect it. For example, the conductive pattern of the circuit board may be soldered with solder cream to contact the case in a mounted state.

The electrical connection terminal assembly is supplied by reel taping to the carrier, and is mounted on the conductive pattern of the circuit board by vacuum pickup from the upper surface of the electrical connection terminal 100, and reflows through the solder cream on the lower surface of the electrical connection terminal 100. Soldered.

The electrical connection terminal 100 includes a core 110, a polymer film 120 that wraps and adheres the core 110 through an adhesive, and a metal layer 130 formed on the outer surface of the polymer film 120.

The elastic core 110 made of rubber may be a tube-shaped non-foaming silicone rubber that satisfies reflow soldering and elasticity conditions, but is not limited thereto.

The core 110 may have a narrow upper width and a wide lower width so that a gap is formed between the case 200 and the gap is filled when pressed.

The core 110 has two through holes 112 and 114 separated vertically, for example, a separator 111 that is formed to have the same height and separates the through holes 112 and 114 may be formed in the middle of the height. have.

At least a portion of the upper through hole 114 may be formed to protrude from the upper end of the case 200, and the lower through hole 112 may be formed not to protrude from the lower end of the case 200.

The cross-sectional shape and size of the through-holes 112 and 114 may be different from each other. For example, a bent portion 114a is formed in the middle of both inner surfaces of the upper through-hole 114 to elastically reduce the force of the object pressed from the top. It can be absorbed and folded.

In addition, as will be described later, since the fitting bar 230 of the case 200 is fitted in the through hole 112 at the lower portion, the fitting bar 230 is substantially coupled to the electrical connection terminal 100 and the case 200. It can have a cross-sectional shape.

The core 110 may be manufactured by, for example, an extrusion process, and is formed symmetrically to achieve a balance in the horizontal direction during soldering, and the upper surface of the core 110 has a flat surface for vacuum pickup, and both corners of the upper surface Each can be formed in a round shape.

The polymer film 120 may be, for example, a polyimide (PI) film having good heat resistance or other heat-resistant polymer film, and the thickness may be determined in consideration of flexibility and mechanical strength.

The metal layer 130 is adhered on the polymer film 120, and in this embodiment, three metal layers 130 in a strip shape are formed, but are not limited thereto, and may be formed in one or a plurality, and in particular, one metal layer 130 ) May be formed on the entire outer surface of the polymer film 120.

The plurality of metal layers 130 may be applied when, for example, a plurality of electrically separated solder patterns are formed on a circuit board so that one metal layer 130 contacts each solder pattern in correspondence with each other.

In this case, each metal layer 130 may be cut with a cut line 115 so that each metal layer 130 can be moved independently, and the cut line 115 includes the electrical connection terminal 100 and the case 200 It may be formed limited to only the portion protruding from.

The case 200, when viewed from above, extends in the width direction by connecting each end of a pair of side plates 220 and 222 extending in the longitudinal direction to form a'c' shape and the side plates 220 and 222 It consists of a side plate 210.

The height Hc of the case 200 may be slightly larger than half the height of the electrical connection terminal 100, but is not limited thereto.

In addition, the case 200 includes a fitting bar 230 extending in the longitudinal direction from the middle of the side plate 210 in the width direction, and as described above, it is fitted into the through hole 112 of the electrical connection terminal 100. The electrical connection terminal 100 plays a main role of coupling to the case 200.

The length of the fitting bar 230 may be longer than the length of the through hole 112 into which the fitting bar 230 is inserted.

At the position where the fitting bar 230 is formed on the side plate 210, after the fitting bar 230 is inserted into the through hole 112 of the electrical connection terminal 100, the electrical connection terminal 100 is placed on the upper surface of the case 200. ) Is determined in relation to the height at which the upper surface of the upper surface protrudes and the height at which the lower surface of the electrical connection terminal 100 protrudes toward the lower surface, and in particular, the lower surface of the electrical connection terminal 100 protrudes slightly toward the lower surface of the case 200 so that soldering is not possible. It needs to be done smoothly.

In addition, the width and height of the fitting bar 230 are determined in relation to the dimensions and flesh thickness of the through hole 112 of the electrical connection terminal 100, and the electrical connection terminal 100 is easily fitted and once inserted, the combined It can be designed with dimensions that keep it in good condition.

Alternatively, the vertical cross-sectional area of a certain portion (see 231 in FIG. 3) from the portion where the fitting bar 230 is connected to the side plate 210 is the same as the size of the through hole 112 of the electrical connection terminal 100 It may be slightly larger, and thereafter, it may be configured in a tapered shape so that the cross-sectional area gradually decreases, so that the electrical connection terminal 100 is easily fitted, and after being fitted, it may be in close contact with the corresponding part 231 to be coupled.

Accordingly, when viewed from the side, the portion 231 of the fitting bar 230 has a height h1, and an end portion of the fitting bar 230 has a height h2.

Unlike this, the fitting bar 230 has a tapered shape as a whole, and the vertical cross-sectional area from the portion connected to the side plate 210 to the end portion may gradually decrease.

The length of the fitting bar 230 is formed larger than the length of the electrical connection terminal 100, as shown in FIG. 3(b), and the lengths of the side plates 220 and 222 are also formed to have a length corresponding thereto. The lengths of the 220 and 222 may be variably shorter than the length of the electrical connection terminal 100.

Wedge-shaped locking jaws 224 and 234 are formed inside the end portions of the side plates 220 and 222 and at the ends of the fitting bar 230, and the electrical connection terminal 100 has a wedge shape formed thinly at the end portion. The guide serves to smoothly enter the interior, and serves to prevent the electrical connection terminal 100 once entered into the interior from being caught and separated.

Here, only one of the locking jaws 224 and 234 may be selectively formed, and when both are formed, it is possible to more reliably prevent the electrical connection terminal 100 from being separated.

The locking jaws 224 and 234 may be formed on the inner side of the end of any one of the side plates 220 and 222 or at the end of the fitting bar 230.

4(a) and 4(b) each show a modified example of the case.

Referring to FIG. 4(a), a plurality of sheet-shaped fixed terminals 223 are formed by insert injection at the bottom of the side plates 210, 220, 222 of the case 200, for example, a material capable of soldering such as metal. It is composed of and can be fixed to the circuit board by soldering.

According to this structure, since only the electrical connection terminal 100 is not fixed to an object such as a circuit board, but the case 200 itself can be fixed, the reliability of the mounting is further improved.

Likewise, referring to FIG. 4B, a plurality of pin-shaped fixing terminals 224 are formed at the lower ends of the side plates 210, 220, 222 of the case 200, and may be fitted and fixed to the circuit board.

The electrical connection terminal 100 of the present invention is pushed and fitted from the side of the case 200. That is, when the fitting bar 230 is pushed into the lower through hole 112 of the electrical connection terminal 100, the electrical connection terminal 100 is pushed into the interior of the case 200 along the fitting bar 230.

At this time, both side plates 220 and 222 are slightly wider outward due to elasticity, and as described above, since the fitting bar 231 has a tape shape, the electrical connection terminal 100 is smoothly pushed in and then the fitting bar 230 When it comes to the part 231 of ), the fitting bar 231 and the through hole 112 of the electrical connection terminal 100 are pushed in while maintaining a close contact, so that the electrical connection terminal 100 is finally It comes in close contact with the interior and is stored.

When all the electrical connection terminals 100 are inserted, both side plates 220 and 222 return to their original state, and the case ( 200) does not deviate from.

If necessary, at least one of the side plates 220 and 222 of the case 200 and the outer surface of the electrical connection terminal 100 may be bonded through an adhesive to make the connection hard.

According to the electrical connection terminal assembly of the present invention, the force exerted by the object even when the height is higher than the width because the case supports the electrical connection terminal at least half in the height direction, resulting in a height substantially less than half the actual height. The middle part is not bent by

In addition, the assembly is good because it can be assembled simply by pushing the electrical connection terminal from the side of the case.

In addition, since reflow soldering is performed while the electrical connection terminal assembly is mounted on a solder pattern of a circuit board, it is easy to mount.

Although the above has been described with the focus on the embodiments of the present invention, various changes can be made at the level of those skilled in the art. Therefore, the scope of the present invention is limited to the above-described embodiments and cannot be interpreted, and should be interpreted by the claims set forth below.

110: core
112, 114: through hole
115: incision groove
120: polymer film
130: metal layer
210, 220, 222: side plate
230: fitting bar
224, 234: jammed jaw

Claims (19)

It is composed of a plastic insulating case with an empty space formed therein, and an elastic electrical connection terminal accommodated in the empty space so that at least an upper part protrudes to the outside of the case and is exposed,
The case,
A pair of first side plates extending in the longitudinal direction;
A second side plate extending in the width direction by connecting one end of the side plate; And
And a fitting bar extending in the longitudinal direction from the middle of the width direction of the second side plate,
The electrical connection terminal,
A core having an upper through hole and a lower through hole separated from each other along the longitudinal direction;
A polymer film that wraps and adheres the core through an adhesive; And
It has a metal layer formed on the outer surface of the polymer film,
The fitting bar is inserted into a lower through hole among the through holes so that the electrical connection terminal is coupled to the case. In claim 1,
The elastic electrical connection terminal assembly, wherein the fitting bar has a tapered shape such that the vertical cross-sectional area of the fitting bar gradually decreases from a portion connected to the second side plate to an end portion. In claim 1,
An elastic electrical connection terminal assembly, characterized in that at least one of an end of the fitting bar or an inner end surface of the first side plate has at least one locking jaw for preventing the electrical connection terminal from being easily removed by an external force. In claim 1,
The elastic electrical connection terminal assembly, characterized in that the length of the fitting bar is longer than the length of the through hole. In claim 1,
The elastic electrical connection terminal assembly, characterized in that the height of the electrical connection terminal is greater than the width of the electrical connection terminal. In claim 1,
The elastic electrical connection terminal assembly, characterized in that the height of the electrical connection terminal protruding toward the upper end of the case is three times higher than the height protruding toward the lower end of the case. In claim 1,
The height of the case is an elastic electrical connection terminal assembly, characterized in that at least 1/3 of the height of the electrical connection terminal. In claim 1,
The elastic electrical connection terminal assembly, characterized in that the plurality of metal layers are formed by being electrically separated along the longitudinal direction. In claim 8,
An elastic electrical connection terminal assembly, wherein the core is partially cut in a vertical direction between the separated metal layers so that each of the metal layers can move independently. In claim 8,
The separated metal layer is an elastic electrical connection terminal assembly, characterized in that formed at regular intervals. In claim 1,
At least a portion of the upper through-hole is formed to protrude from an upper end of the case. In claim 1,
The lower through hole is an elastic electrical connection terminal assembly, characterized in that formed so as not to protrude from the lower end of the case. In claim 1,
An elastic electrical connection terminal assembly, characterized in that a bent portion is formed in an intermediate portion of the inner surface of both sides of the upper through hole among the through holes to elastically absorb and fold a force of an object pressed from the top. In claim 1,
At least one of the first and second side plates of the case and an outer surface of the electrical connection terminal are bonded to each other through an adhesive. In claim 1,
The case is manufactured integrally by injecting the plastic, and the core is exposed to the outside at both ends of the electrical connection terminal in a longitudinal direction. In claim 15,
An elastic electrical connection terminal assembly, characterized in that a fixed terminal is formed at the lower end of the case. In claim 16,
The fixed terminal is fixed by being inserted into the object in the form of a pin or soldered to the object in the form of a metal sheet to be fixed. In claim 1,
The case and the electrical connection terminal are elastic electrical connection terminal assembly, characterized in that the heat resistance corresponding to the soldering. In claim 1,
At least one of an upper surface and a lower surface of the electrical connection terminal is electrically connected to the circuit board by reflow soldering.

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