JP2022109625A - Electric connection member and connection structure - Google Patents

Abstract

To secure high conductive connection performance by maintaining a state in which a conductive part of a conductive member is in contact with an adherend.SOLUTION: An electric connection member, which conductively connects a first object to be connected to a second object to be connected, comprises: a conductive member 110 provided with a conductive part 112 that conductively connects the first object to be connected to the second object to be connected, while being compressed in a thickness direction; a fixing member 120, provided outside the conductive member, which enables the conductive member to be held in a state in which the member is compressed in the thickness direction of the conductive member, while contacting the conductive member with the first object to be connected and the second object to be connected; and a fulcrum member 140, provided outside the fixing member, which is larger in thickness than the fixing member.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to an electrical connection member and a connection structure.

Since window glass for automobiles is provided with, for example, a defroster, a defogger, etc., it is necessary to form a power supply section made of a conductive layer on the glass plate and to electrically connect the power supply section and a terminal. Soldering was widely used to electrically connect the terminals to the power supply. However, due to the spread of restrictions on lead, lead-free solder has been required as a substitute. However, lead-free solder has a melting point higher than that of lead solder by 20 to 45° C., and thus has been insufficiently adhered and easily peeled off.

It is desirable that an electrical connection member, such as a defroster and a defogger, which electrically connects a power supply unit and a terminal in an in-vehicle electrical equipment, has a higher fixing force as an alternative to soldering. As a solder-free electrical connection member that enhances the adhesion force between connection objects, for example, in Patent Documents 1 to 3, a magnetic conductive filler such as nickel, cobalt, iron, etc. is contained in the inside of a rubber-like elastic body. An electrical connection member is disclosed in which a conductive member is held in a state of being compressed in the thickness direction by a fixing member containing an adhesive while being brought into contact with an object to be connected.

WO2020/075810 WO2020/203037 WO2020/218520

However, long-term use of the electrical connection member may weaken the adhesive force of the fixing member. When the adhesive force of the fixing member weakens, the conductive portion of the conductive member may become separated from the adherend, which may result in insufficient conductivity. For this reason, in order to ensure higher conductive connectivity, it is necessary to maintain a state in which the conductive portion of the conductive member is in contact with the adherend.

The present invention has been made in view of the above problems, and an object of the present invention is to ensure high conductive connectivity by maintaining a state in which a conductive portion of a conductive member is in contact with an adherend.

One aspect of the present invention provides an electrical connection member that electrically connects a first connection object and a second connection object, wherein the first connection object and the second connection object are electrically connected when compressed in a thickness direction. and a conductive member provided with a conductive portion for conductively connecting with the connection object of the above, and provided outside the conductive member, the conductive member being in contact with the first connection object and the second connection object. and a fulcrum member provided outside the fixing member and having a greater thickness than the fixing member.

According to one aspect of the present invention, by providing the fulcrum member having a greater thickness than the fixing member outside the fixing member, at least one of the adherends is drawn by the fixing member around the fulcrum member as a fulcrum, bends, and becomes conductive. Since the member is pressurized, the conductive portion of the conductive member is maintained in contact with the adherend, thereby ensuring high electrical connection.

In one aspect of the present invention, the fulcrum member may be made of a material harder than at least the fixing member.

With this configuration, when the adherend of at least one of the first connection object and the second connection object is pressed, the fulcrum member acts as a fulcrum, and the adherend moves inward. It becomes easy to flex and deform.

In one aspect of the present invention, a pair of the fulcrum members may be provided outside the fixing member so as to face each other.

In this way, when the adherend of at least one of the first connection object and the second connection object is pressed, it becomes easy to bend and deform inward with the fulcrum member as the fulcrum.

In one aspect of the present invention, the fulcrum member may be provided so as to surround the outer periphery of the fixing member.

With this configuration, when the adherend of at least one of the first connection object and the second connection object is pressed, the fulcrum member provided so as to surround the outer periphery of the fixing member is It serves as a fulcrum and bends and deforms the adherend inward to enable conductive connection.

In one aspect of the present invention, a plurality of the conductive members may be provided inside the fixing member.

With this configuration, at least one of the adherends is attracted by the fixing member with the fulcrum member as a fulcrum and bends to pressurize the plurality of conductive members. By maintaining the abutting state, it becomes possible to ensure higher conductive connectivity.

In one aspect of the present invention, the conductive members may be provided inside the fixing member in a plurality of rows and a plurality of columns.

In this way, by maintaining a state in which each of the conductive members having a plurality of rows and a plurality of columns is in contact with the adherend, it is possible to ensure higher conductive connectivity.

In one aspect of the present invention, the fixing member may be further provided between the conductive members.

In this way, the adhesive strength of the fixing member is increased, and the plurality of conductive members are pressed. It becomes possible to ensure high conductive connectivity.

In one aspect of the present invention, the conductive member may be provided with a plurality of conductive portions.

By doing so, it is possible to ensure higher conductive connectivity by maintaining a state in which the conductive member provided with the plurality of conductive portions is in contact with the adherend.

Another aspect of the present invention is a connection structure configured by conductively connecting a first connection object and a second connection object with an electrical connection member provided with at least a conductive member and a fixing member, wherein at least A fulcrum member having a greater thickness than the fixed member is provided outside the fixed member, and at least one of the first connection object and the second connection object is drawn by the fixed member. presses the conductive member by bending inward.

According to another aspect of the present invention, by providing a fulcrum member having a greater thickness than the fixing member outside the fixing member, at least one of the adherends is bent by being drawn by the fixing member with the fulcrum member as a fulcrum. Since the conductive member is pressurized, the conductive portion of the conductive member is maintained in contact with the adherend, thereby ensuring high conductive connectivity.

In another aspect of the present invention, the fulcrum member is provided on the electrical connection member, and the conductive member of any of the electrical connection members described above is connected to the first connection object and the second connection object. The electrical connection member may electrically connect the first connection object and the second connection object by being fixed in a compressed state between and.

In this way, by fixing the first connection object and the second connection object in a compressed state via the electrical connection member provided with the fulcrum member, at least one of the Since the adherend is attracted by the fixing member around the fulcrum member as a fulcrum and bends to pressurize the conductive member, the conductive portion of the conductive member is maintained in contact with the adherend, thereby achieving a highly conductive connection. It will be possible to ensure sexuality.

In another aspect of the present invention, at least one of the first connection object and the second connection object is capable of flexural deformation and has a rigidity capable of maintaining a state of pressing the conductive member. It is also possible to have

With this configuration, when the adherend of at least one of the first connection object and the second connection object is pressed, the conductive portion is deformed inwardly about the fulcrum member as a fulcrum. can be easily maintained in a pressurized state, so that high conductive connectivity can be ensured.

According to the present invention, by maintaining the state in which the conductive portion of the conductive member is in contact with the adherend, high conductive connectivity can be ensured.

1A is a plan view showing a schematic configuration of an electrical connection member according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line AA of FIG. 1A. FIG. 5 is a cross-sectional view of a modified example of the electrical connection member according to one embodiment of the present invention; (A) to (E) are plan views of other modifications of the electrical connection member according to the embodiment of the present invention. It is a sectional view showing a schematic structure of connection structure concerning one embodiment of the present invention. (A) to (D) are plan views of electrical connection members according to other embodiments of the present invention. FIG. 5 is a cross-sectional view showing a schematic configuration of a connection structure according to another embodiment of the present invention;

Preferred embodiments of the present invention will be described in detail below. It should be noted that the present embodiment described below does not unduly limit the content of the present invention described in the claims, and all of the configurations described in the present embodiment are essential as means for solving the present invention. not necessarily.

In addition, in the present specification and claims, when "first" and "second" are described, they are used to distinguish different components, and indicate a specific order and superiority. It is not used for

Furthermore, the "conductive member" and the "electrical connection member" disclosed in the present application provide electrical continuity between the adherend as the "first connection object" and the adherend as the "second connection object". It connects. As one aspect of the "first connection object", there can be exemplified an adherend capable of flexural deformation provided with various terminals such as a cable terminal and a terminal of a flexible substrate. An example of the "second connection object" is an adherend provided with various terminals provided on the glass surface, such as an antenna wiring terminal and a ground wiring terminal on the surface of the windshield or window glass. .

First, an outline of the configuration of an electrical connection member according to one embodiment of the present invention will be described with reference to the drawings. FIG. 1(A) is a plan view showing a schematic configuration of an electrical connection member according to one embodiment of the present invention, and FIG. 1(B) is a cross-sectional view taken along the line AA of FIG. 1(A).

The electrical connection member 100 of the present embodiment is provided so as to be electrically connectable to a first connection object and a second connection object that are arranged facing each other in the vertical direction (height direction). Specifically, the electrical connection member 100 includes, for example, a flexurally deformable adherend provided with various terminals such as a cable terminal and a terminal of a flexible substrate, which are first connection objects, and a second connection object. In a compressed state between the object to be connected and the adherend on which various terminals provided on the glass surface such as antenna wiring terminals such as glass antennas and film antennas and ground wiring terminals are provided configured for conductive connection.

The electrical connection member 100 includes, as shown in FIG. 1, a plurality of conductive members 110, a fixing member 120, a sheet-like connecting member 130 that connects the conductive members 110 and the fixing member 120, and a fulcrum member 140. . The conductive member 110 , the fixing member 120 and the fulcrum member 140 are integrated by the connecting member 130 to form the electrical connection member 100 .

The connecting member 130 is a planar sheet-like member, and is made of, for example, a resin sheet. As shown in FIG. 1B, the connecting member 130 is provided with a through hole 130a, and the conductive member 110 is inserted into the through hole 130a and fixed to the connecting member 130. As shown in FIG. Examples of the resin sheet forming the connecting member 130 include a polyethylene terephthalate (PET) sheet, a polyethylene naphthalate sheet, a polycarbonate sheet, a polyetheretherketone sheet, a polyimide sheet, a polyamide sheet, a polyethylene sheet, a polypropylene sheet, a polyurethane sheet, and the like. used. Among these, a PET sheet and a polyimide sheet are preferable from the viewpoint of durability and heat resistance. Although the thickness of the connecting member 130 is not particularly limited, it is, for example, 30 to 1000 μm, preferably 50 to 350 μm.

In the electrical connection member 100 of the present embodiment, the conductive member 110, the fixing member 120, and the fulcrum member 140 are connected and integrated via the connecting member 130 made of a resin sheet. It is good also as the structure which does not carry out. For example, the conductive member 110, the fixing member 120, and the fulcrum member 140 may be attached to a sheet-like member such as a resin film, rubber film, mesh sheet, net, paper, woven fabric, non-woven fabric, foam sheet, etc., and integrated. .

The fixing member 120 is a member that allows both surfaces of the electrical connection member 100 to be adhered to other members to be connected. It is composed of a system adhesive and the like. As shown in FIG. 1B, the fixing member 120 is provided outside the conductive member 110 and is provided near the outer edge of the connecting member 130 on the front side and the back side. In this embodiment, the fixing member 120 is formed to surround the plurality of conductive members 110 and has a frame shape. In FIG. 1, since the connecting member 130 is formed in a square shape, the fixing member 120 is also formed in a square frame shape in accordance with that shape, but the shape of the fixing member 120 is limited to a square frame shape. However, other shapes may be used.

In the electrical connection member 100 of the present embodiment, the fixing member 120 is provided outside the conductive member 110 on the front side and the back side of the connecting member 130, so that the conductive portion 112 of the conductive member 110 is the first connection target. It has a function of holding the conductive member 110 in a state of being compressed in the thickness direction while contacting the object and the second connection object. For this reason, the electrical connection member 100 has the fixing member 120, thereby electrically connecting the first connection object and the second connection object, and the attached member on which the connection object is provided. (For example, a glass plate) can be securely and easily fixed to the terminal.

The conductive member 110 includes a conductive portion 112 made of a conductive rubber-like elastic body and an insulating portion 114 made of a non-conductive rubber-like elastic body. More specifically, as shown in FIG. 1B, the conductive rubber-like elastic body constituting the conductive portion 112 contains a large number of conductive particles 112a serving as conductive fillers inside the rubber-like elastic body. be done. Conductive particles 112 a are preferably arranged continuously in the thickness direction of electrical connection member 100 . The conductive particles 112a more preferably have magnetism and are arranged in a chain in the thickness direction by applying a magnetic field. By arranging the conductive particles 112a continuously in the thickness direction, it is possible to achieve low electrical resistance while reducing the compressive stress at the time of 25% compression.

Conductive portion 112 is generally formed in a columnar shape. The cross-sectional shape of the columnar shape is not particularly limited, and may be circular or polygonal such as quadrangular, but circular is preferred. A cylindrical insulating portion 114 is provided so as to surround the outer periphery of the columnar conductive portion 112 , and the insulating portion 114 and the conductive portion 112 constitute the conductive member 110 together. The surface shape of the conductive portion 112 in contact with the adherend may be a flat surface as shown in FIG. etc.

The insulating portion 114 is made of an insulating rubber-like elastic body. That is, the conductive member 110 is integrally formed of a rubber-like elastic body, and as shown in FIG. have. In addition, as shown in FIG. 1B, the conductive member 110 may have different outer diameters along the thickness direction. The conductive member 110 has, for example, as shown in FIG. Thus, when the outer diameter of both end surfaces of the conductive member 110 is small, both end surfaces are easily compressed along the thickness direction.

The conductive portion 112 preferably has an electrical resistance of 100 mΩ or less when compressed by 25%. When the electrical resistance is 100 mΩ or less, the conductive portion 112 is less likely to generate heat even when a large current is applied. From such a point of view, the electrical resistance is more preferably 20 mΩ or less. In addition, the electrical resistance is usually 0.1 mΩ or more due to restrictions on materials and the like. The electrical resistance at 25% compression is obtained by measuring the voltage by passing a current generated from a constant current source through the conductive portion 112 in a state where the conductive portion 112 is compressed by 25%, and calculating the electrical resistance value. Obtainable.

The conductive particles 112a are preferably magnetic conductive fillers, as described above. Materials for the magnetically conductive filler include nickel, cobalt, iron, ferrite, and alloys thereof, and the shape thereof is particulate, fibrous, flakes, thin wires, and the like. In addition, a good conductive metal, resin, or ceramic coated with a magnetic conductor, or a magnetic conductive material coated with a good conductive metal may be used. Electroconductive metals include gold, silver, platinum, aluminum, copper, iron, palladium, chromium, stainless steel, and the like.

The average particle diameter of the conductive particles 112a is preferably 1 to 200 μm, more preferably 5 to 100 μm, in that a chain state can be easily formed by applying a magnetic field and a conductor can be efficiently formed. . In particular, in the present embodiment, the average particle diameter of the conductive particles is preferably 10 to 300 μm in order to suppress transmission loss of electrical signals. The average particle size means the particle size (D50) at 50% of volume integration in the particle size distribution of the conductive filler determined by the laser diffraction/scattering method. A conductive filler may be used individually by 1 type, and may use 2 or more types together.

The filling rate of the conductive particles 112a in the conductive portion 112 is, for example, 25 to 80% by volume, preferably 30 to 75% by volume. By setting the filling rate of the conductive particles 112a within these ranges, it is possible to ensure conductivity while imparting a certain strength to the conductive portion 112 . The filling rate means the volume ratio of the conductive particles 112 a to the total volume of the conductive portion 112 .

On the other hand, the insulating portion 114 does not normally contain the conductive particles 112a, and the filling rate of the conductive particles 112a in the insulating portion 114 is normally 0% by volume. However, the insulating portion 114 may contain a small amount of conductive particles 112a that are inevitably mixed in the manufacturing process or the like within a range that does not impair the insulating properties. Therefore, for example, the filling rate of the conductive particles 112a in the insulating portion 114 may be less than 5% by volume, preferably less than 1% by volume.

Further, examples of the rubber-like elastic body forming the conductive portion 112 include thermosetting rubber, thermoplastic elastomer, and the like. Thermosetting rubber is a rubber that is cured and crosslinked by heating, and specifically includes silicone rubber, natural rubber, isoprene rubber, butadiene rubber, acrylonitrile-butadiene rubber, styrene-butadiene rubber, chloroprene rubber, and nitrile rubber. , butyl rubber, ethylene/propylene rubber, ethylene/propylene/diene rubber, acrylic rubber, fluororubber, urethane rubber, and the like. Of these, silicone rubber is preferred because of its excellent moldability, electrical insulation, weather resistance, and the like.

Examples of thermoplastic elastomers include styrene-based thermoplastic elastomers, olefin-based thermoplastic elastomers, ester-based thermoplastic elastomers, urethane-based thermoplastic elastomers, polyamide-based thermoplastic elastomers, vinyl chloride-based thermoplastic elastomers, fluorinated thermoplastic elastomers, An ionic cross-linking type thermoplastic elastomer and the like can be mentioned. The rubber-like elastic body may be used singly or in combination of two or more of the above-described rubber-like elastic bodies.

Thermosetting rubber, thermoplastic elastomer, or the like may also be used as the rubber-like elastic body that serves as the polymer matrix that constitutes the insulating portion 114. Specific examples and preferred examples thereof are as described above. . Similarly, the rubber-like elastic body constituting the insulating portion 114 may be used singly or in combination of two or more. As described above, it is preferable that the rubber-like elastic bodies forming the insulating portion 114 and the conductive portion 112 are integrally formed. Therefore, it is preferable to use the same kind of rubber-like elastic material for forming the insulating portion 114 and the conductive portion 112, and the rubber-like elastic substance for forming the insulating portion 114 and the conductive portion 112 is both silicone rubber. is more preferable.

From the viewpoint of facilitating alignment of the conductive filler in the thickness direction by applying a magnetic field or the like, the rubber-like elastic body is preferably a cured liquid rubber or a material that can be melted by heating. Liquid rubber is one that becomes liquid at normal temperature (23°C) and normal pressure (1 atm) before curing. liquid silicone rubber is preferred. Moreover, a thermoplastic elastomer is mentioned as a thing which can be heat-melted.

The hardness of the conductive portion 112 is preferably 30-87, more preferably 40-85, and even more preferably 60-80. By setting it within the above range, it becomes easy to adjust the compressive stress when the conductive member is compressed by 25% within a desired range. From the same point of view, the hardness of the insulating portion 114 is preferably 20-50, more preferably 25-40. The hardness of the conductive portion 112 is a type A durometer in accordance with "Vulcanized rubber and thermoplastic rubber-Determination of hardness-Part 3: Durometer hardness" described in JIS K6253-3:2012. at 23° C. using

The diameter of the conductive portion 112 in the conductive member 110 is, for example, 1.0 to 6.0 mm. When the diameter of the conductive portion 112 is within the range described above, the electrical resistance when compressed by 25% can easily be within a predetermined range. As a result, even if a large current flows between the upper and lower surfaces of the conductive member 110 during compression, the temperature rise of the conductive member 110 can be suppressed. From these points of view, the diameter of the conductive portion 112 is preferably 1.0 to 3.0 mm, more preferably 1.5 to 2.6 mm. When the diameter of the conductive portion 112 differs in the thickness direction, it means the average value of the diameter of the conductive portion 112 on the upper surface and the diameter of the conductive portion 112 on the lower surface. In addition, in this specification, the diameter can be calculated as the diameter of a circle having an area equal to the area of a circle other than the circle.

The diameter of conductive portion 112 is preferably 35 to 97% of the diameter of conductive member 110 . By making it 35% or more, the electric resistance can be sufficiently reduced, and by making it 97% or less, it is possible to impart appropriate elasticity to the conductive member 110 . From these viewpoints, the ratio of the diameter of the conductive portion 112 to the diameter of the conductive member 110 is more preferably 50% or more, more preferably 55% or more, more preferably 60% or more, and more preferably 95% or less. , 80% or less is more preferable. With such a ratio, rubber elasticity can be easily maintained for a long period of time while allowing a large current to flow, thereby enabling more stable conduction. In addition, when the diameter of the conductive member 110 differs in the thickness direction, it means the average value of the diameter on the upper surface and the diameter on the lower surface.

Although the diameter of the conductive member 110 is not particularly limited, it is, for example, 1.1 to 8.0 mm, preferably 1.1 to 6.0 mm, more preferably 1.8 to 5.0 mm. The thickness of the conductive member 110 is not particularly limited, but is preferably 0.2 to 1.5 mm, more preferably 0.3 to 1.2 mm. By setting the thickness of the conductive member 110 within the above range, the conductive member 110 can be easily held in a compressed state by the fixing member 120 . In addition, when the conductive member 110 is used while being compressed in the thickness direction, the compressibility is not particularly limited, but is, for example, 5 to 40%, preferably 10 to 35%, more preferably 5 to 40%. is 15-30%. The compressibility is calculated by the formula (H0-H1)/H0, where H0 is the thickness of the conductive member 110 when no load is applied, and H1 is the thickness of the compressed conductive member 110 during use. can be done.

The fulcrum member 140 is provided on the outside of the fixing member 120, and when the electrical connection member 100 is adhered to the first connection object 12, which is one of the adherends, the first connection member 140 is attached using the principle of leverage. It is a member that functions as a fulcrum for flexing the connection object 12 inward to make it easier to deform. The fulcrum member 140 is made of a material that is at least harder than the fixing member 120 , such as hard resin, hard rubber, metal, etc., which has hardness and repulsive force that does not lose to the fixing force of the fixing member 120 and does not collapse. In the present embodiment, when the adherend of at least one of the first connection object 12 and the second connection object 14 is pressed, the fulcrum member 140 serves as a fulcrum, and the adherend moves toward the inner side. A pair of fulcrum members 140 are provided on the outside of the fixed member 120 so as to face each other in order to facilitate bending deformation.

In addition, the fulcrum member 140 has a greater thickness than the fixing member 120 in order to function as a fulcrum for flexing the first connection object 12 inward using the principle of leverage to facilitate deformation. characterized by In this embodiment, as shown in FIG. 1B, the fulcrum member 140 is attached to the fixing member 120 on the side to be adhered to the flexurally deformable adherend, that is, from the fixing member 120 on the upper surface side of the connecting member 130. The bottom surface of the fulcrum member 140 is configured to be flush with the bottom surface of the fixing member 120 .

In order to manufacture the electrical connection member 100 of the present embodiment having such a configuration, first, a mold composed of an upper mold and a lower mold made of a non-magnetic material such as aluminum or copper is prepared. Pins made of a ferromagnetic material such as iron or a magnet are embedded at positions corresponding to the conductive portions 112 in the upper mold and the lower mold of the mold. One end of the pin is exposed to the cavity surfaces of the upper and lower molds.

Next, a resin sheet or the like for forming the connecting member 130 is prepared. The resin sheet may be prepared by punching or the like to form a plurality of through holes 130a. The resin sheet is inserted into the above-mentioned mold in which the pins are embedded, and liquid rubber, molten thermoplastic elastomer, or the like, which is the raw material of the conductive member 110, is injected into the cavity. The liquid rubber is previously mixed with conductive particles 112a having magnetism.

After that, a magnetic field is applied from above and below the mold using a magnet. A parallel magnetic field connecting the pins is formed in the cavity, and the conductive particles 112a in the liquid rubber or the like are arranged continuously in the direction of the lines of magnetic force. After this arrangement, the upper and lower molds are completely closed and heat treatment is performed to harden the liquid rubber, thereby obtaining a sheet-like molded body in which the conductive member 110 and the resin sheet constituting the connecting member 130 are integrated. Thereafter, the electrical connection member 100 of the present embodiment is obtained by attaching the fixing member 120 and the fulcrum member 140 to the sheet-like molding by a known method.

Note that when either the upper surface side or the lower surface side of the electrical connection member 101 is an adherend capable of bending deformation, as shown in FIG. Both the side and the bottom side are configured to be thicker than the fixing member 121 . As described above, when the adherend of the electrical connection member 101 is a deformable adherend having various terminals such as cable terminals and flexible substrate terminals on both upper and lower surfaces, the fulcrum member The thickness of the connecting member 141 is greater than the thickness of the fixing member 121 on both the upper and lower surfaces of the connecting member 131 .

Further, the configuration of the fulcrum member 140 constituting the electrical connection member 100, the number and arrangement of the conductive members 110 are not limited to the electrical connection member 100 of this embodiment.

For example, as shown in FIG. 3A, the electrical connection member 102 may be configured such that the fulcrum member 142 surrounds the outer periphery of the fixing member 122 . Even if the fulcrum member 142 having such a configuration is provided on the outer peripheral side of the fixing member 122, when the adherend is pressed, the fulcrum member 142 acts as a fulcrum, bending and deforming the adherend inward, thereby causing conduction. be able to connect.

Further, as shown in FIG. 3B, the electrical connection member 103 may have a configuration in which a plurality of conductive members 110 are provided inside the fixing member 123 . By providing a plurality of conductive members 110 in this manner, a terminal of an adherend is electrically connected to a member to be connected such as a conductive layer through the plurality of conductive members 110 .

Therefore, even if a large current flows between the terminal and the member to be connected, the electrical resistance of each conductive member 110 can be kept low, thereby facilitating suppression of temperature rise in the conductive member 110 . In addition, since each conductive member 110 can be made smaller by providing a plurality of conductive members 110, the load when compressing the plurality of conductive members 110 as a whole is reduced. Furthermore, at least one of the adherends is attracted by the fixing member 123 with the fulcrum member 143 as a fulcrum and bends to pressurize the plurality of conductive members 110, so that the conductive portions 112 (see FIG. 1 ( B)) maintains a state of being in contact with the adherend, thereby ensuring higher conductive connectivity.

Further, as shown in FIG. 3C, the electrical connection member 104 has a configuration in which a plurality of conductive members 110 are provided inside fixing members 124, and the fixing members 124 are also provided between the conductive members 110. may be By configuring the electrical connection member 104 as described above, in addition to the effects obtained when a plurality of the conductive members 110 are provided, the adhesive strength of the fixing member 124 is increased, and a plurality of conductive members are formed using the fulcrum member 144 as a fulcrum. Since the members 110 are pressurized, the conductive portions 112 (see FIG. 1B) of the respective conductive members 110 are maintained in contact with the adherend, thereby ensuring higher conductive connectivity. become.

Further, as shown in FIG. 3D, the electrical connection member 105 may have a configuration in which a plurality of conductive portions 116 are provided on the conductive member 115 arranged inside the fixing member 125 . In this way, the conductive member 115 provided with the plurality of conductive portions 116 is kept in contact with the adherend with the fulcrum member 145 as a fulcrum, so that higher conductive connectivity can be ensured. become.

Furthermore, as shown in FIG. 3E, the electrical connection member 106 may have a configuration in which a plurality of conductive members 115 having a plurality of conductive portions 116 are provided inside the fixing member 126 . By providing a plurality of such conductive members 115 , a terminal of the adherend is electrically connected to a member to be connected such as a conductive layer through the plurality of conductive members 115 . Therefore, even if a large current flows between the terminal and the member to be connected, the electrical resistance of each conductive member 115 can be kept low, thereby facilitating suppression of temperature rise in the conductive member 115 .

In addition, since each conductive member 115 can be made small by providing a plurality of conductive members 115, the load when compressing the plurality of conductive members 115 as a whole is reduced. Furthermore, since at least one adherend is attracted by the fixing member 126 with the fulcrum member 146 as a fulcrum and is bent to press the plurality of conductive members 115, the conductive portions 116 of the respective conductive members 115 are pressed against the adherend. By maintaining the state of contact with the , it becomes possible to ensure higher conductive connectivity.

Next, the configuration of the connection structure including the electrical connection member 100 according to one embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a cross-sectional view showing a schematic configuration of a connection structure according to one embodiment of the present invention.

In the connection structure 10 of this embodiment, an electrical connection member 100 is provided between a first connection object 12 and a second connection object 14 that are arranged to face each other in the vertical direction (height direction, thickness direction). Thus, conductive connection is established between the first connection object 12 and the second connection object 14 . Specifically, the connection structure 10 is, for example, a cable (coaxial cable, twisted wire cable, single wire cable, etc.) that serves as the first connection object 12 with a metal connection terminal attached to the end, or connection of a flexible substrate. Between an adherend such as a terminal surface that can be flexurally deformed and an adherend that has terminal rigidity and does not flexibly deform, on which an antenna wiring such as a glass antenna or a film antenna is provided as the second connection object 14 The electrically conductive member 110 of the electrical connection member 100 provided in the two is fixed in a compressed state so as to electrically connect them.

In the connection structure 10 of this embodiment, the electrical connection member 100 is arranged between the first connection object 12 and the second connection object 14 . At this time, both end surfaces of the conductive portion 112 of each conductive member 110 of the electrical connection member 100 come into contact with the first connection object 12 and the second connection object 14, respectively. Therefore, the first connection object 12 is connected to the second connection object 14 via the plurality of conductive parts 112 . 4, the upper surface of the fixing member 120 is adhered to the first connection object 12, and the lower surface of the fixing member 120 is adhered to the second connection object 14, as shown in FIG. By doing so, the first connection object 12 is fixed to the second connection object 14 to achieve conductive connection.

At this time, each conductive member 110 contacts the first connection object 12 and the second connection object 14 in a compressed state. Each conductive member 110 increases its conductivity when compressed and is biased by a repulsive force against the first connection object 12 and the second connection object 14, so that the first connection object 12 and the second connection object connection with the connection object 14 can be performed more reliably. Further, when biased by the repulsive force, the first connection object 12 is easily separated from the second connection object 14, but in the connection structure 10 of the present embodiment, the first connection object 12 is separated from the second connection object 14. Since it is reliably fixed to the second connection object 14 by the fixing member 120, it is difficult for it to come off. Each conductive member 110 is preferably compressed by 5 to 40%, preferably by 10 to 30%, more preferably by 15 to 30%, for example. In addition, the surface of the first connection object 12 that contacts the plurality of conductive members 110 is preferably planar in order to facilitate uniform compression of the plurality of conductive members 110 .

Furthermore, in the present embodiment, the electrical connection member 100 is provided with a fulcrum member 140 having a greater thickness than the fixing member 120 on the outside of the fixing member 120 . Therefore, by interposing the electrical connection member 100 between the first connection object 12 and the second connection object 14 to be adherends and bonding them, as shown in FIG. The conductive member 110 can be fixed and maintained in a pressurized state by drawing the first connection object 12 to be adhered to the fixing member 120 in a V-shape and bending it by the principle of leverage with the . It can be a connection structure 10 .

In addition, in the connection structure 10 of the present embodiment, the first connection object 12, which is an adherend that bends and deforms, has a rigidity capable of maintaining a state of pressing the conductive member 110 such as a metal plate or a resin plate, for example. It is preferable to use a plate material that has a flexure and is bendable and deformable. Further, the thickness of the first connection object 12 is about 0.1 mm to 2 mm depending on the material used. In addition, in the present embodiment, in order to maintain the pressurized state of the first connection object 12, for example, a housing case (not shown) is pressed from the upper surface side, or a housing having a protruding portion, etc. may be backed up by an additional reinforcing member that presses only the adherend on the conductive member 110 .

In the connection structure 10 of the present embodiment, the fulcrum member 140 is provided outside the fixing member 120 as the electrical connection member 100 for electrically connecting the first connection object 12 and the second connection object 14, which are adherends. is used, but the fulcrum member 140 may not be a component of the electrical connection member 100 . That is, the fulcrum member 140 that is thicker than the fixing member 120 may be provided outside the fixing member 120 as a separate member from the electrical connection member 100 .

Next, another embodiment of the electrical connection member of the present invention will be described with reference to the drawings. 5A to 5D are plan views of electrical connection members according to other embodiments of the present invention.

As shown in FIG. 5A, the electrical connection member 200 of this embodiment is characterized in that the conductive members 210 are provided inside the fixing member 220 in a plurality of rows and a plurality of columns. In other words, the electrical connection member 200 is provided with a plurality of conductive members 110 in multiple rows and columns, so that the terminals are electrically connected to a member to be connected such as a conductive layer through the plurality of conductive members 110 . Become. Therefore, even if a large current flows between the terminal and the member to be connected, the electrical resistance of each conductive member 210 can be kept low, thereby facilitating suppression of temperature rise in the conductive member 210 . Moreover, when a plurality of conductive members 210 are provided, each conductive member 210 can be made smaller. Therefore, the load when compressing the plurality of conductive members 210 as a whole is reduced, and the repulsive force of the conductive members 210 makes it difficult for the terminals to come off.

For example, as shown in FIG. 5A, a plurality of conductive members 210 (two in FIG. 5A) are arranged in a plurality of rows (two rows in FIG. 5A). be lined up. The distance between the plurality of conductive members 210 is preferably 0.5 mm or more and 200 mm or less, more preferably 1 mm or more and 50 mm or less. By setting the distance between the conductive members 210 within these ranges, the insulation between adjacent conductive members 210 can be ensured without increasing the size of the electrical connection member 200 more than necessary. The interval between the conductive members 210 means the shortest distance between each conductive member 210 and the closest conductive member 210 . Although four conductive members 210 are provided in the electrical connection member 200 of the present embodiment, the number of conductive members 210 is not limited to four.

As shown in FIG. 5A, this embodiment is characterized in that a pair of fulcrum members 240 are provided on the outside of the fixed member 220 so as to face each other. In other words, the electrical connecting member 200 is formed by integrating a plurality of conductive members 210 , fixing members 220 and fulcrum members 240 via connecting members 230 . The fulcrum member 240 has a greater thickness than the fixing member 220 in order to function as a fulcrum for flexing the first connection object inward using the principle of leverage to facilitate deformation. there is In this way, by providing the fulcrum member 240 having a thickness larger than that of the fixing member 220 outside the fixing member 220, each of the conductive members having a plurality of rows and a plurality of columns is kept in contact with the adherend. By doing so, it is possible to ensure higher conductive connectivity.

The electrical connection member 201 may be configured such that the fulcrum member 241 surrounds the outer periphery of the fixing member 221, as shown in FIG. 5B. Even if the fulcrum member 241 having such a configuration is provided on the outer peripheral side of the fixing member 221, when the adherend is pressed, the fulcrum member 241 serves as a fulcrum, and the adherend is flexed and deformed inward. be able to connect.

Furthermore, as shown in FIG. 5(C), the electrical connection member 202 has a plurality of conductive members 210 provided inside the fixing members 222 in a plurality of rows and columns. may be provided. By configuring the electrical connection member 202 as described above, in addition to the effects obtained when a plurality of the conductive members 210 are provided, the adhesive strength of the fixing member 222 is increased, and a plurality of conductive members are formed using the fulcrum member 242 as a fulcrum. Since the members 210 are pressurized, the conductive portions 212 (see FIG. 6) of the respective conductive members 210 are maintained in contact with the adherend, thereby ensuring higher conductive connectivity. .

In addition, as shown in FIG. 5D, the electrical connection member 203 has a plurality of conductive members 210 provided inside the fixing members 223 in a plurality of rows and columns. and the fulcrum member 243 is provided so as to surround the outer circumference of the fixing member 223 . Even if the fulcrum member 243 having such a configuration is provided on the outer peripheral side of the fixing member 223, when the adherend is pressed, the adhesive strength of the fixing member 223 is increased, and the fulcrum member 243 serves as a fulcrum to support the adherend. This makes it easier to flex and deform the adherend to the inside, so that the conductive connectivity can be enhanced.

Next, the configuration of a connection structure provided with an electrical connection member according to another embodiment of the present invention will be described with reference to the drawings. FIG. 6 is a cross-sectional view showing a schematic configuration of a connection structure according to another embodiment of the invention. In FIG. 6, the electrical connection member 202 shown in FIG. 5C is used as the electrical connection member provided in the connection structure according to another embodiment of the present invention. The connection structure of this embodiment can also be applied to the electrical connection members 200, 201, and 203 according to other embodiments described above.

In the connection structure 20 of this embodiment, an electrical connection member 202 is provided between a first connection object 22 and a second connection object 24 that are arranged to face each other in the vertical direction (height direction, thickness direction). Thus, the first connection object 22 and the second connection object 24 are electrically connected. Specifically, the connection structure 20 is, for example, a cable (coaxial cable, twisted wire cable, single wire cable, etc.) that serves as the first connection object 22 with a metal connection terminal attached to the end, or connection of a flexible substrate. Between an adherend such as a terminal surface that can be flexurally deformed and an adherend that has terminal rigidity and is not flexurally deformable, on which antenna wiring such as a glass antenna or a film antenna is provided as the second connection object 24 The electrically conductive member 210 of the electrical connection member 202 provided in the two is fixed in a compressed state so as to electrically connect them.

In the connection structure 20 of this embodiment, the electrical connection member 202 is arranged between the first connection object 22 and the second connection object 24 . At this time, both end surfaces of the conductive portion 212 containing the conductive particles 212a of each conductive member 210 of the electrical connection member 202 contact the first connection object 22 and the second connection object 24, respectively. Therefore, the first connection object 22 is connected to the second connection object 24 via the plurality of conductive parts 212 . 6, the upper surface of the fixing member 222 is adhered to the first connection object 22, and the lower surface of the fixing member 222 is adhered to the second connection object 24, as shown in FIG. By doing so, the first connection object 22 is fixed to the second connection object 24 to achieve electrical connection.

At this time, each conductive member 210 contacts the first connection object 22 and the second connection object 24 in a compressed state. Each conductive member 210 increases its conductivity when compressed and is biased by a repulsive force against the first connection object 22 and the second connection object 24, so that the first connection object 22 and the second connection object connection with the connection object 24 can be performed more reliably. Further, when biased by the repulsive force, the first connection object 22 is easily separated from the second connection object 24, but in the connection structure 20 of the present embodiment, the first connection object 22 is Since it is reliably fixed to the second connection object 24 by the fixing member 222, it is difficult for the second connection object 24 to come off. Each conductive member 210 is preferably compressed by 5 to 40%, preferably by 10 to 30%, and more preferably by 15 to 30%. In addition, the surface of the first connection object 22 that contacts the plurality of conductive members 210 is preferably planar in order to facilitate uniform compression of the plurality of conductive members 210 .

Furthermore, in the present embodiment, the electrical connection member 202 is provided with a fulcrum member 242 having a greater thickness than the fixing member 222 on the outside of the fixing member 222 . Therefore, by interposing the electrical connection member 202 between the first connection object 22 and the second connection object 24 to be adherends and bonding them, as shown in FIG. By drawing and bending the first connection object 22, which is an adherend, the connection structure 20 can be made in which the conductive member 210 can be fixed and maintained in a pressurized state.

In addition, in the connection structure 20 of the present embodiment, the first connection object 22, which is an adherend that bends and deforms, has a rigidity capable of maintaining a state of pressing the conductive member 210 such as a metal plate or a resin plate, for example. It is preferable to use a plate material that has a flexure and is bendable and deformable. Further, the thickness of the first connection object 22 is about 0.1 mm to 2 mm depending on the material used. In addition, in the present embodiment, in order to maintain the pressurized state of the first connection object 12, for example, a housing case (not shown) is pressed from the upper surface side, or a housing having a protruding portion, etc. may be backed up by an additional reinforcing member that presses only the adherend on the conductive member 110 .

As described above, in the present embodiment, by using the connection structure 20, the fixing member 222 and the adherend are connected to the adherend with the fulcrum member 242 as the fulcrum by the crimping operation to the first connection object 22, which is the adherend. The first connection object 22 will be attracted. For this reason, the first connection object 22 bends, and the conductive member 210 can be maintained in a pressurized state.

In the above description of the connection structure 10, an example in which the electrical connection member 100 according to the first embodiment is used has been described. , the description of which is omitted. In addition, the electrical connection members 200 to 204 of other embodiments include an antenna on a glass plate having a conductive connection portion on the glass plate, a camera heater, a wiper heater, a backlight, sensors such as a rain sensor, and further. can also be used for electrical connections to solar cells and the like.

Further, in the connection structure 20 of the present embodiment, the fulcrum member 242 is provided outside the fixing member 222 as the electrical connection member 202 for electrically connecting the first connection object 22 and the second connection object 24 as adherends. is used, but the fulcrum member 242 may not be a component of the electrical connection member 202 . That is, the fulcrum member 242 that is thicker than the fixing member 222 may be provided outside the fixing member 222 as a separate member from the electrical connecting member 202 .

Next, functions and effects of the electrical connection members 100 and 200 and the connection structures 10 and 20 according to each embodiment of the present invention will be described.

In this embodiment, by providing fulcrum members 140 and 240 having a greater thickness than the fixing members 120 and 220 outside the fixing members 120 and 220, at least one adherend is fixed using the fulcrum members 140 and 240 as fulcrums. It is attracted by members 120 and 220 and bends to pressurize conductive members 110 and 210 . Therefore, by maintaining the state in which the conductive portions 112 and 212 of the conductive members 110 and 210 are in contact with the adherend, it is possible to continuously ensure high electrical connection.

In particular, at least one of the first connection objects 12, 22 and the second connection objects 14, 24, which are adherends of the electrical connection members 100, 200, can be flexurally deformed, and the conductive member If the fixing members 120 and 220 are rigid enough to maintain the state of pressing against the conductive members 110 and 210, the fulcrum members 140 and 240 are used to draw and bend the adherends. can be maintained fixed under pressure. Therefore, even if the adhesive strength of the fixing members 120 and 220 weakens due to the long-term use of the electrical connection members 100 and 200, the connection structures 10 and 20 can be used as levers with the fulcrum members 140 and 240 as fulcrums. Since the adherend is kept in contact with the conductive members 110 and 210 according to the principle, it is possible to continuously ensure high conductive connectivity.

Although each embodiment of the present invention has been described in detail as above, those skilled in the art will easily understand that many modifications are possible without substantially departing from the novel matters and effects of the present invention. You can. Accordingly, all such modifications are intended to be included within the scope of the present invention.

For example, a term described at least once in the specification or drawings together with a different, broader or synonymous term can be replaced with the different term anywhere in the specification or drawings. Also, the configuration and operation of the electrical connection member and connection structure are not limited to those described in each embodiment of the present invention, and various modifications are possible.

10, 20 connection structures 12, 22 first connection objects 14, 24 second connection objects 100, 101, 102, 103, 104, 105, 106,
200, 201, 202, 203 electrical connection members 110, 115, 210 conductive members 112, 116, 212 conductive portions 112a, 212a conductive particles (conductive medium)
114, 214 insulating part (polymer matrix)
120, 121, 122, 123, 124, 125, 126,
220, 221, 222, 223 fixing members 130, 131, 132, 133, 134, 135, 136,
230, 231, 232, 233 connecting member 130a through holes 140, 141, 142, 143, 144, 145, 146,
240, 241, 242, 243 fulcrum member

Claims (11)

In the electrical connection member that electrically connects the first connection object and the second connection object,
a conductive member provided with a conductive portion that conductively connects the first connection object and the second connection object when compressed in a thickness direction;
Provided outside the conductive member, the conductive member is held in a compressed state in the thickness direction of the conductive member while the conductive member is in contact with the first connection object and the second connection object. a fixing member that causes
and a fulcrum member provided outside the fixing member and having a greater thickness than the fixing member. 2. The electrical connecting member according to claim 1, wherein the fulcrum member is made of a material harder than at least the fixing member. 3. The electrical connection member according to claim 1, wherein a pair of said fulcrum members are provided outside said fixing member so as to face each other. The electrical connection member according to claim 1 or 2, wherein the fulcrum member is provided so as to surround the outer periphery of the fixing member. The electrical connection member according to any one of claims 1 to 4, wherein a plurality of said conductive members are provided inside said fixing member. 6. The electrical connection member according to claim 5, wherein the conductive members are provided inside the fixing member in a plurality of rows and a plurality of columns. 7. The electrical connection member according to claim 5, wherein said fixing member is further provided between said conductive members. The conductive member according to any one of claims 1 to 7, wherein the conductive member is provided with a plurality of conductive portions. In a connection structure configured by conductively connecting a first connection object and a second connection object with an electrical connection member provided with at least a conductive member and a fixing member,
A fulcrum member having a thickness greater than at least the fixing member is provided outside the fixing member,
A connection structure in which at least one of the first connection object and the second connection object is attracted by the fixing member and bends inward to press the conductive member. The fulcrum member is provided on the electrical connection member,
By fixing the conductive member of the electrical connection member according to any one of claims 1 to 8 in a compressed state between the first connection object and the second connection object, 10. The connection structure according to claim 9, wherein the electrical connection member electrically connects the first connection object and the second connection object. 11. According to claim 9, wherein at least one of said first connection object and said second connection object is capable of flexural deformation and has rigidity capable of maintaining a state of pressing said conductive member. Connection structure as described.

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