JP4319588B2 - Conductive member - Google Patents

Description

  The present invention relates to a conductive member.

Conventionally, a conductive member having a structure in which a net-like conductor is provided around a core material has already been proposed (see, for example, Patent Document 1 below).
JP-A-2-296396

  By the way, this type of conductive member is, for example, if the conductive member is too small relative to the size of the gap of the intervention location, or if the operator does not arrange the conductive member at the appropriate intervention location, The core material may not be sufficiently elastically deformed. In this case, the pressure contact force with respect to the interposition part of a mesh conductor may weaken, and there exists a possibility that the electrical connection with a mesh conductor and an interposition part may become inadequate. Therefore, when the conductive member is sandwiched between the intervention locations, it is important to sandwich the conductive member in a state where the core material is sufficiently elastically deformed.

However, the conventional conductive member has no way of confirming whether or not the conductive member has been properly sandwiched between the intervention sites in a state where the core material is sufficiently elastically deformed.
The present invention has been made to solve the above problems, and an object of the present invention is to provide a conductive member capable of confirming whether or not it has been properly sandwiched between intervention sites.

The characteristic configuration employed in the present invention will be described below.
The conductive member of the present invention is constituted by a core material that is elastically deformed and a net-like conductor provided around the core material, and when sandwiched between the first member and the second member, A conductive member that fills the gap between the two members and electrically connects the two members,
The core material is formed of a translucent gel-like resin material in which the amount of light transmission decreases as the thickness increases,
The net-like conductor is characterized in that a net having a size capable of observing the light transmitted by the core material from the outside of the net-like conductor is formed.

In this conductive member, the core material is formed of a translucent gel-like resin material in which the amount of light transmission decreases as the thickness increases.
Gel resin material is a resin material that has a structure that includes a fluid component in the gap between the three-dimensional network structure formed by the molecular chains of the base polymer. is there.

  The base polymer may be any polymer that does not cause any inconvenience in forming a gel-like resin material. Typical examples thereof include various thermoplastic elastomers such as styrene, ester, amide, and urethane. , As well as hydrogenated products and other modified products, or styrene, ABS, olefin, vinyl chloride, acrylate ester, methacrylate ester, carbonate, acetal, amide, halogenated poly Examples thereof include thermoplastic resins such as ether-based, halogenated olefin-based, cellulose-based, vinylidene-based, vinylbutyral-based, and alkylene oxide-based materials, and rubber-modified products of these resins. These may be used alone or in combination of two or more as long as they are compatible with each other.

  The flowable component may be any component that does not cause inconvenience in forming the gel-like resin material, but usually a liquid or liquid material is suitably used at room temperature. More specifically, for example, various softeners for rubber or resin can be used, and any hydrophilic or hydrophobic softener can be used as long as it is compatible with the base polymer. However, any type of softening agent such as mineral oil, vegetable oil, or synthetic oil may be used. These fluid components may be used alone or in combination of two or more as long as the compatibility is good.

  In addition, the transparency of the gel-like resin material can be adjusted as appropriate depending on the amount of pigment or other additive added, but the state in which the amount of transmitted light changes as the thickness changes is most observed from the outside of the core. It is desirable to adjust the transparency so that it is easy to do. If the transparency of the gel-like resin material is excessively high, the light always transmits well even if the thickness changes, whereas if the transparency of the gel-like resin material is excessively low, the thickness always changes. Light does not transmit, and in any case, it becomes difficult to observe the change in the amount of transmitted light accompanying the change in thickness. Therefore, the transparency of the gel-like resin material may be adjusted in consideration of the light transmission direction that the operator will observe and the amount of change in thickness in the transmission direction. For example, the visible light transmittance is 30 to 75. It is good to adjust to about%.

  The hardness of the gel-like resin material is not particularly limited, but as a guideline, for example, a low hardness body having an Asker FP hardness of 0.1 to 100 is desirable. This is because when the Asker FP hardness is less than 0.1, a large amount of softening agent is added, so that the compression set tends to increase. In addition, if the Asker FP hardness exceeds 100, it will not be possible to compress it to the intended state unless a larger pressure is applied when it is sandwiched between the intervention parts. Is not preferred. The Asker FP hardness is a hardness that can be measured by an Asker FP type hardness meter manufactured by Kobunshi Keiki Co., Ltd. JIS A hardness of “JIS K6253” is known as one of the standards related to relatively general hardness, but the Asker FP hardness is a low hardness material in which it is difficult to obtain a measured value having a significant difference with JIS A hardness. It is a standard that is used when measuring the hardness.

  The hardness of the gel resin material can be set to a desired hardness by appropriately adjusting the blending ratio of the base polymer and the fluid component. Specifically, the greater the amount of the fluid component, the more the gel resin material has Since the hardness decreases, the blending ratio of the two may be adjusted to a desired hardness according to the combination of the selected base polymer and fluid component. As an example, for example, when the gel-like resin material is obtained by blending 50 to 2000 parts by weight of a hydrocarbon-based process oil as a softening agent with respect to 100 parts by weight of a styrene block copolymer. It is possible to obtain a low-hardness gel-like resin material suitable for use in the above. In addition, in a gel-like resin material, you may give or improve a flame retardance, electroconductivity, damping property, etc. by adding various additives and fillers as needed.

  The core material made of such a gel-like resin material is molded so as to have a form according to the purpose. For example, when it is inserted in a specific part, it is processed by a known molding method (for example, injection molding, extrusion molding, etc.) so as to have a shape suitable for the specific part. Moreover, if the core is formed into a columnar or prismatic shape, it can be cut into a general-purpose product that can be used as necessary.

  Moreover, the length of the core material can be arbitrarily set from a relatively short to a long one. When the conductive member is formed of a long core material, for example, the conductive member can be suitably used as a conductive gasket. Specifically, if a conductive gasket, which is a long conductive member, is arranged so as to surround the opening along the periphery of the opening of the housing, the conductive material will be conductive when the opening is closed with a lid. The gap between the casing and the lid can be filled with the property gasket, and the casing and the lid can be electrically connected. By providing such a conductive gasket, electromagnetic waves can be prevented from leaking out of the housing through the gap between the housing and the lid, and electromagnetic waves coming from outside the housing can be prevented from entering the gap between the housing and the lid. Can be prevented from entering into the casing. On the other hand, even if the core material is not long, it can be used as, for example, a conductive part such as a ground contact, and both parts are electrically connected by sandwiching them between two parts that are not directly electrically connected. Can be connected to. As a more specific example, when two printed wiring boards are arranged in parallel, the conductive member of the present invention is sandwiched between the two printed wiring boards to electrically connect them. Therefore, if only one printed wiring board is grounded, the other printed wiring board can be grounded.

  On the other hand, as the net-like conductor, for example, a wire woven by crossing a wire corresponding to warp and a wire corresponding to a weft, or a wire knitted by a knitting method such as knitting can be used. Moreover, if it has a structure that can be regarded as a net-like structure, the net-like conductor can be formed of a material other than a wire. For example, a network conductor may be formed by connecting a large number of rings. The shape of the mesh is arbitrary, and may be anything such as one having a square mesh, one having a hexagonal mesh, or one having an irregular mesh.

  Moreover, this mesh-like conductor may be formed in a mesh shape in advance, and may be wound around the core material, or may be formed while winding a wire around the core material. For example, in the case of forming a net while winding a wire around a rod-shaped core material, one or more wire rods are wound clockwise and another one or more wire rods are left-handed, and each is a spiral. When it is wound around the core material so as to draw, a net is woven on the surface of the core material. Further, the net may be knitted around the core material while passing the core material through the center of a knitting machine capable of continuously knitting a tubular net.

  As a material for constituting the network conductor, a material made of a metal or an alloy having low electrical resistance represented by copper or aluminum, a material made of carbon fiber, or a base material made of a non-conductive substance, A material in which a conductive layer (for example, a plating layer) made of a conductive material such as a metal is formed on the surface layer can be used.

  In the present invention, it is important that the mesh conductor forms a mesh having a size that allows the light transmitted through the core material to be observed from the outside of the mesh conductor. It is preferable to set the ratio (= opening area / total area of the net-like conductor including the opening) to about 40% to 98%. When this aperture ratio becomes excessively small, it becomes difficult to observe the light transmitted through the core material from the outside of the mesh conductor. In addition, even if the mesh is excessively large, the light transmitted by the core material will not be observable from the outside of the mesh conductor. This is not a problem, but it is beneficial because the density of conductors is too small. is not.

  According to the conductive member configured as described above, the core material is formed of a translucent gel-like resin material, and the network conductor transmits light transmitted through the core material from the outside of the network conductor. Since the mesh having a size that can be observed is formed, the operator can observe the light transmitted through the inside of the core material even though the mesh conductor is provided on the outer periphery of the core material.

  More specifically, when there is a light source on the side opposite to the worker across the conductive member, the worker can observe the light emitted from the light source and transmitted through the core material. Further, there may be a light source on the worker side. In this case, the light emitted from the light source on the worker side and incident on the core material is reflected by the pigment or the like inside the core material and reflected by the worker. Can be observed. Alternatively, even when light emitted from the light source on the worker side is incident on the core material and passes through the core material as it is, if the transmitted light hits another member and is reflected, the reflected light is back again Since the light enters the core material and passes through the core material, the operator can observe the transmitted light.

  When the conductive member is sandwiched between the interposed parts and compressed, the core material made of a low-hardness gel-like resin material swells greatly in the direction orthogonal to the compression direction, and the compression direction decreases as the thickness in the compression direction decreases. The thickness in the orthogonal direction is increased. At this time, the amount of light transmitted through the translucent core material in the direction orthogonal to the compression direction decreases as the compression amount increases.

  Therefore, when the conductive member is properly sandwiched, when the operator observes each part of the conductive member, light of brightness corresponding to each part is observed. On the other hand, when the conductive member is not properly sandwiched, when the operator observes each part of the conductive member, light having brightness different from that when the conductive member is properly sandwiched is observed.

Therefore, according to the conductive member of the present invention, the operator can confirm whether or not the conductive member has been properly sandwiched between the intervention sites with the brightness of the observed light.
As mentioned above, although the electroconductive member of this invention was demonstrated, it is preferable in this invention that the following structures are employ | adopted further.

  For example, it is preferable that a part of the mesh conductor is embedded in the core material and another part is exposed on the surface of the core material. Such a structure can be formed, for example, by melting the surface layer of the core material with heat after the mesh conductor is provided on the outer periphery of the core material.

  In the case of the conductive member configured as described above, the mesh conductor is not only wound around the outer periphery of the core material but also partially embedded in the core material, so that the mesh conductor is the core material. It is possible to prevent the relative displacement from occurring.

Next, an embodiment of the present invention will be described with an example.
As shown in FIG. 1, the conductive member 1 has a structure in which a net-like conductor 5 is provided on the outer periphery of a core material 3.

  The core material 3 is a low-hardness body formed of a gel-like resin material. In this embodiment, the gel-like resin material is 50 to 2000 weights as a softening agent with respect to 100 parts by weight of a styrene block copolymer. Part of hydrocarbon-based process oil is used. Further, the process oil contained in the gel-like resin material also functions as a rust preventive that suppresses oxidation of the surface of the network conductor 5 when attached to the surface of the network conductor 5. The gel-like resin material forming the core material 3 is translucent.

  The net-like conductor 5 is formed by winding a plurality of metal wires around the core material 3 in a spiral manner, half of which is right-handed and half of which is left-handed. Are alternately crossed so as to overlap from above, forming a net-like structure. The mesh of the mesh conductor 5 is approximately 4 mm square, the aperture ratio is approximately 80%, and the mesh has a dimension that allows the light transmitted through the core material 3 to be observed from the outside of the mesh conductor 5.

  In addition, in the non-pressurized state, the net-like conductor 5 has a part (the part indicated by a broken line in FIG. 1) buried in the core material 3 and the other part (a solid line in FIG. 1). The portion shown) is exposed on the surface of the core material 3. In such a structure, first, a net-like conductor 5 is provided on the outer periphery of the core material 3, and a die having a through hole having substantially the same shape as the cross-sectional shape of the core material 3 and the net-like conductor 5 is heated, The core material 3 and the net-like conductor 5 are passed through this die, the surface layer of the core material 3 is melted by heat, and a part of the inner surface side of the net-like conductor 5 is buried in the core material 3 continuously. Can be manufactured.

  The conductive member 1 configured as described above is disposed between the first member 11 and the second member 12, for example, as shown in FIG. As shown in FIG. 2, the first member 11 and the second member 12 are sandwiched.

  At this time, as shown in FIG. 2B, the conductive member 1 is compressed by the amount that the first member 11 and the second member 12 approach each other, whereby the core material 3 is elastically deformed, The net-like conductor 5 provided on the outer periphery of the core material 3 is pressed against the first member 11 and the second member 12 by the restoring force of the core material 3, and as a result, the first member 11 and the second member 12 and the net-like conductor 5 are all electrically connected.

  Further, when the conductive member 1 is compressed in a specific direction, the core material 3 made of a gel resin material having low hardness swells greatly in a direction orthogonal to the compression direction. In the example shown in FIG. 2A and FIG. 2B, the conductive member 1 has a thickness L1 in the direction orthogonal to the compression direction in an unpressurized state. The thickness in the direction orthogonal to the compression direction is L2 (L2> L1).

  Thus, when the thickness in the direction orthogonal to the compression direction changes from L1 to L2 before and after compression, the amount of light transmitted through the translucent core 3 in the direction orthogonal to the compression direction is shown in FIG. The pressurized state shown in FIG. 6B is reduced compared to the unpressurized state shown in a). Therefore, when the operator observes the conductive member 1 from the direction of arrow A in FIG. 2, the brightness of the light transmitted through the core member 3 looks different from the operator.

  Therefore, the operator can know how bright the light transmitted through the core member 3 is in the non-pressurized state shown in FIG. 2A, and FIG. It is also possible to know how bright the light transmitted through the core member 3 is in the appropriate interposed state shown.

  Moreover, as shown in FIG.2 (c), when the electroconductive member 1 is not inserted | pinched appropriately, the thickness of the direction orthogonal to a compression direction becomes L3 after compression. The thickness L3 can have various values depending on the deformation state of the conductive member 1, but generally has a dimension different from L1 and L2. Therefore, when the operator observes the conductive member 1 from the direction of arrow A in FIG. 2, the brightness of the light transmitted through the core material 3 is shown in FIG. 2A and FIG. The brightness looks different in each state.

  Therefore, according to this conductive member 1, the operator compares the observed brightness of light with the appropriate interposed state shown in FIG. It is possible to confirm whether or not it has been caught in the place of attachment.

As mentioned above, although embodiment of this invention was described, this invention is not limited to said specific one Embodiment, In addition, it can implement with a various form.
For example, in the above-described embodiment, the mesh conductor 5 exemplarily woven so as to intersect a plurality of metal wires is illustrated. However, the light transmitted through the core material 3 can be observed from the outside of the mesh conductor 5. As long as the mesh is formed, the specific form of the mesh conductor is not limited. For example, a metal conductor knitted by a knitting method such as knitting, such as the mesh conductor 21 shown in FIG. 3A, or the mesh conductor 23 shown in FIG. As described above, a structure in which a plurality of metal rings are connected may be used.

The perspective view of the electroconductive member illustrated as embodiment of this invention. Sectional drawing which shows the difference in the deformation | transformation state of the said electroconductive member. The figure which shows the modification of a net-like conductor.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Conductive member, 3 ... Core material, 5, 21, 23 ... Reticulated conductor, 11 ... 1st member, 12 ... 2nd member.

Claims (2)

Consists of an elastically deformable core material and a net-like conductor provided around the core material, and when sandwiched between the first member and the second member, fills the gap between the two members A conductive member for electrically connecting both members,
The core material is formed of a translucent gel-like resin material in which the amount of light transmission decreases as the thickness increases,
The conductive member is characterized in that a mesh having a size capable of observing light transmitted through the core material from the outside of the conductive mesh member is formed. 2. The conductive member according to claim 1, wherein a part of the net-like conductor is embedded in the core material and another part is exposed on the surface of the core material. .