JP2018120766A - Connecting end-equipped cable and cable connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a bottom profile that reduces the height of a connection part in a cable connection structure that connects a cable and a board.SOLUTION: In a connection end-equipped cable 31 including a cable 32 and a connection end 33 that contacts a connection target member to the end part of the cable, the cable 32 includes a conductive wire 34 and an insulating coating 35 that covers the conductive wire, and the connecting end 33 includes a conductive part 36 made of a conductive rubber and an insulating part 37 made of an insulating rubber covering the conductive part, and the conductive part 36 includes external contact surfaces 3b1 and 3b2 exposed on the surface and conductive wire contact parts 3c1 and 3c2 contacting the conductive wire 34, and the insulating part 37 includes a fixing part 3d fixed to the insulating coating 35.SELECTED DRAWING: Figure 22

Description

  The present invention relates to a cable with a connection end provided with a connection end for connecting a cable such as a coaxial cable to a substrate or the like, and a cable connection structure thereof.

  Small electronic devices, such as mobile phones and notebook computers, that are convenient to carry are being developed. Components mounted on such small electronic devices are also required to be miniaturized. For example, cables such as coaxial cables used for connecting high-frequency circuit components are required to be connected to the board at the bottom. ing. For these reasons, an L-shaped connector that can be connected perpendicularly to the board with respect to the length direction of the cable is used at the end of the cable. For example, Japanese Patent No. 5229924 (Patent Document 1) It describes in Unexamined-Japanese-Patent No. 2006-179409 (patent document 2).

Japanese Patent No. 5229924 JP 2006-179409 A

  However, even if the connector described in the above-mentioned Japanese Patent No. 5229924 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2006-179409 (Patent Document 2) is used, there is a limit to bottoming because it has a joint portion between metals. was there. Therefore, the present invention has been made for the purpose of developing a cable connection structure that can be further reduced in height.

In order to achieve the above object, the present invention provides a cable with a connection end including a connection end capable of reducing the thickness, and the cable with a connection end is configured as follows.
That is, a cable with a connection end provided with a cable and a connection end that comes into contact with a connection target member at an end portion of the cable, the cable having a conductive wire and an insulating coating covering the conductive wire, and the connection The end has a conductive part made of conductive rubber and an insulating part made of insulating rubber covering the conductive part, and the conductive part is an external contact surface exposed on the surface and a conductive wire contact that contacts the conductive wire And the insulating portion provides a cable with a connecting end having a fixing portion that is fixed to the insulating coating.

Since the cable has a connection end including a cable and a connection end that contacts the connection target member at the end of the cable, the cable is connected to the contact of the substrate by arranging the connection end at a predetermined position on the substrate. Conductive connection.
About a cable, the general cable which has a conducting wire and the insulation coating which covers the said conducting wire can be used.

  Since the connection end has a conductive portion made of conductive rubber and an insulating portion made of insulating rubber covering the conductive portion, the rubber material is molded so as to be tightly connected to the conductive wire and the insulation coating constituting the cable. It is not always necessary to have a fitting structure for joining metals together. Therefore, a connection structure thinner than that of a metal connector can be realized. Moreover, since it consists of rubber materials, compression is possible and it can compress about 5 to 50% with respect to total thickness at the time of a connection with a board | substrate. Therefore, it can be arranged in a thinner state at the time of mounting.

  Since the conductive portion of the connection end has an external contact surface exposed on the surface, the external contact surface made of conductive rubber can be brought into close contact with the contact on the substrate. Therefore, a reliable conductive connection can be obtained. In addition, since the conducting part has a conducting wire contact part that contacts the conducting wire, the conducting part can be closely connected to the conducting wire of the cable by forming the conducting part, without deforming the conducting wire or via a separate connector. In addition, it is possible to make a conductive connection to the exposed conductive wire itself. Therefore, since the conducting wire is in contact with and covered with the conducting portion except for being covered with an insulating coating, the conducting wire is not exposed to the outside, and the conducting wire can be reliably protected from moisture and dust.

  Since the insulating portion of the connection end has a fixing portion that is fixed to the insulating coating of the cable, the cable and the connection end can be firmly fixed. Therefore, it can be set as the cable with a connection end which a cable does not come off easily.

It can be set as the cable with a connection end in which the said external contact surface is formed substantially parallel with respect to the length direction of the said conducting wire.
Since the external contact surface of the conducting part is formed substantially parallel to the length direction of the conducting wire, the cable can be arranged in parallel to the board and conductively connected, so the connection space on the board can be reduced. it can.

  It can be set as the cable with a connection end which is an integrally molded body of the cable and the connection end. Since the cable is integrally formed with the connection end, the connection between the cable and the connection end and manufacture are easy, and the connection between the cable and the connection end can be strengthened.

The conducting portion may be a cable with a connecting end formed of magnetic conductive particles oriented in an insulating rubber-like elastic body.
Since the conducting portion is formed of magnetic conductive particles oriented in the insulating rubber-like elastic body, a compact conducting portion can be formed, and the connection end can be easily lowered. Moreover, the connection with the conducting wire of the cable can be performed at the same time as the formation of the conducting portion, and the manufacture is easy.

  The conducting wire contact portion may be a cable with a connecting end that is in contact with the surrounding surface of the conducting wire. Since the conducting wire contact portion of the conducting portion is brought into contact with the surrounding surface of the conducting wire, the contact area between the conducting portion and the conducting wire can be increased, the resistance value can be lowered, and the conducting wire can be hardly pulled out from the connection end.

The fixed portion may be a welding surface of the insulating portion with respect to the insulating coating.
Since the fixing portion between the insulating coating of the cable provided on the insulating portion at the connection end is the welding surface, the fixing force between the insulating portion and the insulating coating can be increased. Further, the insulating portion and the insulating coating can be fixed by integral molding of the cable and the connection end, and a cable with a connection end can be manufactured.

It can be set as the cable with a connection end provided with two or more said conducting wires.
Since a plurality of cable conductors are provided, the present invention can be applied to cables such as multicore cables and coaxial cables.

The conducting wire is a central conducting wire and a shield wire surrounding the central conducting wire, a first conducting portion that conducts with the central conducting wire at the connection end, and a first conducting portion that is insulated from the first conducting portion and conducted with the shielding wire. It can be set as the cable with a connection end provided with 2 conduction | electrical_connection parts.
Since the conducting wire is a central conducting wire and a shield wire surrounding the central conducting wire, the cable can be a coaxial cable or the like. A coaxial cable in which one conductor is covered with a so-called shielded wire is a type of cable that is particularly difficult to make thin among various cables. it can. In addition, since the connection end includes a first conducting portion that conducts with the central conducting wire and a second conducting portion that is insulated from the first conducting portion and conducted with the shield wire, the central conducting wire and the shield wire of the cable are separately provided. It can connect to the 1st conduction | electrical_connection part and 2nd conduction | electrical_connection part of a connection end. Then, the shielding effect can be exhibited by the second conduction part, and the first conduction part can be protected from noise and the like, and can be suitably used for high-frequency signal transmission.

The second conducting portion has a cylindrical shape, and has a connection end provided with a conductive cover member that intersects the second conducting portion and contacts the second conducting portion in a circular shape but does not contact the first conducting portion. It can be a cable.
The second conducting portion is cylindrical, and includes a conductive cover member that intersects the second conducting portion and contacts the second conducting portion in an annular shape and does not contact the first conducting portion. A shield can be provided in all directions other than the external contact surface of one conduction part, and it can be set as a cable with a connection end strong against noise.

It can be set as the cable with a connection end further provided with the pressing member which has a board | substrate connection site | part engaged with a board | substrate.
Since it further includes a pressing member having a substrate connection portion that engages with the substrate, the connection with the substrate can be easily and reliably performed.

  The present invention is also a connection structure for connecting any of the cables with connection ends to a substrate having a contact, wherein the connection ends are compressed by 5 to 50% between the pressing member and the substrate, It can be set as the cable connection structure pressed and fixed in the state which the external contact surface of the conduction | electrical_connection part and the said contact contacted. Since the connection end is compressed by 5 to 50%, the conduction resistance of the conduction part can be reduced. In addition, since the external contact surface of the conduction portion and the contact point are pressed and fixed, the connection end can be fixed to the substrate, and the connection end can be a connector to conductively connect the cable. it can. Furthermore, it can be set as a connection end thinner than a metal connector.

The conducting wire is a central conducting wire and a shield wire surrounding the central conducting wire, and a first conducting portion that is electrically connected to the central conducting wire and has a cylindrical shape at the connection end, and is insulated from the first conducting portion and the shielded wire. And a second conductive portion having a cylindrical shape that is electrically connected to each other.
The conducting wire is a central conducting wire and a shield wire surrounding the central conducting wire, and is connected to the central conducting wire at the connection end and has a cylindrical shape and a cylindrical shape that is insulated from the first conducting portion and is electrically connected to the shielding wire. Since the second conductive portion is provided, a cable connection structure in which the coaxial cable is connected at the connection end and connected to the substrate can be obtained. In addition, since the periphery of the first conductive portion is shielded by the cylindrical second conductive portion at the connection end, a structure in which the cable is connected to the substrate in a state where noise is difficult to enter can be achieved.

Moreover, it can be set as the cable with a connection end which has an external contact surface which a conduction | electrical_connection part exposes outside in the one surface of a connection end, and the other surface on the opposite side to the said one surface.
Since the external contact surface is provided on the two opposing surfaces of the connection end, conductive connection to other than the substrate is possible.
Moreover, when the 2nd conduction | electrical_connection part continuous with a shield wire is exposed to two surfaces, the shield effect of the one surface side can be heightened by pressing one surface with an electroconductive member.

  An insulating member may be provided on the side surface of the connection end opposite to the external contact surface to cover at least one conducting portion when there are a plurality of conducting portions. By disposing the insulating member, it is possible to prevent this one conducting portion from being short-circuited with another conducting portion.

  In addition, a cover member made of a conductive material that conducts with one conducting portion can be provided on the surface opposite to the external contact surface. If such a cover member is provided, this cover member can function as a contact for connecting to other components. Moreover, if the cover member is the second conductive portion that is continuous with the shield wire, the cover member can cover the upper surface of the connection end, and the shielding effect can be enhanced.

  According to the cable with a connection end and the cable connection structure of the present invention, the connection thickness between the cable and the substrate can be reduced, and the cable can be hardly detached from the connection portion between the cable and the substrate.

It is a bottom view of the cable with a connection end of 1st Embodiment. It is a front view of the cable with a connection end of FIG. It is the III-III sectional view taken on the line of the cable with a connection end of FIG. It is the IV-IV sectional view taken on the line of the cable with a connection end of FIG. It is a schematic cross section of the manufacturing metal mold | die which manufactures the cable with a connection end of FIG. It is explanatory drawing of the state which showed the process of manufacturing the cable with a connection end of FIG. 1, and put the mixture in the metal mold | die. It is explanatory drawing of the state which showed the process in which the cable with a connection end of FIG. 1 was manufactured, and made the magnetic conductive particle in a mixture magnetic-field align. It is explanatory drawing of the state before fitting the pressing member in the receiving member on a board | substrate, showing the process of mounting the cable with a connection end of FIG. It is explanatory drawing of the state which showed the process which mounts the cable with a connection end of FIG. 1 on a board | substrate, and fitted the pressing member in the receiving member on a board | substrate. FIG. 10 is a plan view of FIG. 9. FIG. 11 is a cross-sectional view corresponding to FIG. 4 of a cable with a connecting end according to a modification of 1-1. It is a bottom view of the cable with a connection end of 2nd Embodiment. It is a front view of the cable with a connection end of FIG. It is the XIV-XIV sectional view taken on the line of the cable with a connection end of FIG. It is the XV-XV sectional view taken on the line of the cable with a connection end of FIG. It is the XVI-XVI sectional view taken on the line of the cable with a connecting end of FIG. It is the XVII-XVII sectional view taken on the line of the cable with a connection end of FIG. It is the XVIII-XVIII sectional view taken on the line of the cable with connection end of FIG. It is a bottom view of the cable with a connection end of 3rd Embodiment. It is a front view of the cable with a connection end of FIG. It is the XXI-XXI sectional view taken on the line of the cable with a connection end of FIG. FIG. 20 is a cross-sectional view taken along the line XXII-XXII of the cable with connection end in FIG. 19. FIG. 23 is a cross-sectional view corresponding to FIG. 22 of a cable with a connection end according to a 3-1. FIG. 23 is a cross-sectional view corresponding to FIG. 22 of a cable with a connection end of a 3-2 modified example. FIG. 23 is a cross-sectional view corresponding to FIG. 22 of a cable with a connection end of a 3-3 modified example. FIG. 23 is a cross-sectional view corresponding to FIG. 22 of a cable with a connection end of a 3-4 modified example. FIG. 23 is a cross-sectional view corresponding to FIG. 22 of the cable with connection ends of the 3-5 modified example. FIG. 23 is a cross-sectional view corresponding to FIG. 22 of the cable with connection ends of the 3-6 modified example. FIG. 23 is a cross-sectional view corresponding to FIG. 22 of the cable with connection ends of the fourth embodiment.

  The cable with a connection end and the cable connection structure of the present invention will be described in detail based on some embodiments. In those embodiments, the description of overlapping portions of common materials, manufacturing methods, mounting methods, effects, etc. will be omitted.

First Embodiment [FIGS. 1 to 4]:
The cable 11 with a connection end of this embodiment is shown in FIGS. The cable 11 with a connection end includes a cable 12 and a connection end 13 that comes into contact with a connection target member such as a board or a mating connector at the end of the cable 12, and the cable 12 and the connection end 13 are integrated. It is. In the present specification and drawings, the side where the connection end contacts the connection target member will be described as “lower side”, and the opposite side will be described as “upper side”. The method of use is not limited.

  The cable 12 in the present embodiment has a single conductive wire 14 at the center thereof and an insulation coating 15 that covers the conductive wire 14. The conducting wire 14 is composed of a single wire composed of one strand or a stranded wire composed of a plurality of strands. The material is generally copper, but may be silver or other highly conductive metal or alloy, and if necessary plated with a metal such as gold, silver, nickel, tin, etc. It may be. The plated one is preferable because oxidation and other deterioration can be suppressed by plating.

  In the case where the conductive portion 16 of the connection end 13 to be described later has magnetic conductive particles oriented in a daisy chain, the conductive wire 14 is preferably made of a non-magnetic material or a material that is substantially non-magnetic. This is because if a magnetic material is used for the conducting wire 14, the magnetic field forming the conducting portion 16 is disturbed in the direction along the conducting wire 14, and the conducting portion 16 may not be shaped into a desired shape.

  The insulating coating 15 is formed so as to cover the conductive wire 14 with an insulating material. Examples of the material of the insulating coating 15 include thermoplastic elastomer, rubber, and soft resin. More specifically, silicone rubber, fluororesin, polyethylene, soft polyvinyl chloride, ethylene / propylene rubber, and polyester are used. Yes, these foams can also be used. Moreover, when using the cable 11 with a connection end for a high frequency use, in order to make the dielectric constant of the insulating coating 15 low, it is preferable to use a fluororesin, a polypropylene, or these foams for the material of the insulating coating 15.

  At the end of the cable 12, an exposed portion 1 a is formed in which the conductive wire 14 protrudes without being covered with the insulating coating 15, and is conductively connected to a conduction portion 16 of the connection end 13 described later. That is, the exposed portion 1a is exposed to such an extent that it can be conductively connected to the conducting portion 16, but the surface (peripheral surface) in the length direction of the conducting wire 14 is preferably in contact with the conducting portion 16, and the diameter of the conducting portion 16 is increased. More preferably, it is exposed to the same degree as that of the conductive portion 16.

  The connection end 13 is integrated with the cable 12 at the end of the cable 12, and has a conductive conductive portion 16 and an insulating insulating portion 17 that covers the conductive portion 16. The conduction portion 16 is made of a conductive rubber-like elastic body, and has an external contact surface 1b exposed on the surface and a conductor contact portion 1c that contacts the conductor 14 of the cable 12. It is preferable that the conductive portion 16 has magnetic conductive particles (magnetic conductors) arranged in a daisy chain in an insulating rubber-like elastic body.

  Examples of the material of the magnetic conductive particles include nickel, cobalt, iron, ferrite, and alloys thereof, and the shape may be particles, fibers, strips, fine wires, or the like. Furthermore, it is good also as what coat | covered the electroconductive metal, resin, and the ceramic with the magnetic conductor, and covered the electroconductive metal with the magnetic conductor. Examples of the electroconductive metal include gold, silver, platinum, aluminum, copper, iron, palladium, chromium, and stainless steel. The average particle diameter of the magnetic conductive particles is preferably 1 μm to 200 μm from the viewpoint that a chain state can be easily formed by magnetic field orientation and a conductor can be efficiently formed.

  In addition, at least in the conductor contact portion 1 c that contacts the conductor 14, it is preferable that the material of the magnetic conductive particles is the same as the material constituting the conducting portion 16. This is because if the same material is used, the contact resistance between the conductive wire 14 and the conductive portion 16 is reduced, and the conductivity can be increased. For example, when the conducting wire 14 is a silver wire or a silver plating conducting wire, the particles constituting the conductive portion 16 are also silver plating particles. In particular, it is a more preferable aspect that the conductive wire 14 is a silver-plated copper wire and the conductive portion 16 is formed of a silver-plated magnetic conductor.

  The insulating portion 17 is made of an insulating rubber-like elastic body and has a fixing portion 1 d that is fixed to the insulating coating 15 of the cable 12. Further, in order to increase the adhesion with the cable 12, an extension portion 1e extending toward the cable 12 is formed so as to increase the area of the fixing portion 1d. The fixing portion 1d has a configuration in which the insulating portion 17 is directly bonded to the insulating coating 15 of the cable 12, a configuration in which the insulating portion 17 is fixed via a primer or an adhesive layer, and the surface of the insulating coating 15 when the insulating portion 17 is molded. Can be configured.

  Examples of the rubber-like elastic body used as the material of the insulating portion 17 include an insulating thermosetting rubber and an insulating thermoplastic elastomer. More specifically, among thermosetting rubbers, silicone rubber, natural rubber, isoprene rubber, butadiene rubber, acrylonitrile butadiene rubber, 1,2-polybutadiene, styrene / butadiene rubber, chloroprene rubber, nitrile rubber, butyl rubber, ethylene / propylene Examples thereof include rubber, chlorosulfone rubber, polyethylene rubber, acrylic rubber, epichlorohydrin rubber, fluorine rubber, and urethane rubber. Of these, silicone rubber is preferred because of its excellent moldability, electrical insulation, weather resistance, and the like. For thermoplastic elastomers, styrene thermoplastic elastomer, olefin thermoplastic elastomer, ester thermoplastic elastomer, urethane thermoplastic elastomer, amide thermoplastic elastomer, vinyl chloride thermoplastic elastomer, fluorinated thermoplastic elastomer, ion Examples thereof include cross-linked thermoplastic elastomers.

  In addition, in order to make the conductive portion 16 have a structure in which the particulate magnetic conductors are arranged in a daisy chain, the insulating portion 17 has an insulating rubber-like elastic body obtained by curing liquid rubber, or an insulating material that can be heated and melted. It is preferable to use a rubber-like elastic body. For example, in rubber-like elastic bodies obtained by curing liquid rubber, silicone rubber, natural rubber, isoprene rubber, butadiene rubber, 1,2-polybutadiene, styrene / butadiene rubber, nitrile rubber, butyl rubber, ethylene / propylene rubber, urethane rubber, fluorine For example, rubber. For rubber-like elastic bodies that can be heated and melted, styrene thermoplastic elastomer, olefin thermoplastic elastomer, ester thermoplastic elastomer, urethane thermoplastic elastomer, amide thermoplastic elastomer, vinyl chloride thermoplastic elastomer, fluorinated A thermoplastic elastomer, an ion-crosslinking thermoplastic elastomer, etc. are mentioned.

  The viscosity of the liquid rubber before being cured or the rubber-like elastic body at the time of heating and melting is preferably 1.0 to 250 Pa · s, which is a viscosity at which the magnetic conductor contained at 25 ° C. can be moved by a magnetic field. -50 Pa · s is more preferable. In the case of high-frequency transmission, it is preferable to use a material having a low dielectric constant among these materials. Specifically, silicone rubber and fluorine rubber are suitable.

  When silicone rubber is used for the insulating coating 15 of the conductive wire 14, it is preferable to use silicone rubber for the resin forming the insulating portion 17. Further, when heat treatment is performed in order to integrate the connection end 13 and the conductive wire 14, the resin forming the insulating portion 17 is not only high in heat resistance but also highly flexible. It is preferable to use polyethylene.

  Next, the manufacturing method of the cable 11 with a connection end is demonstrated. First, the cable 12 is prepared, the insulation coating 15 at the tip of the cable 12 is removed, the end of the conducting wire 14 is exposed, and the exposed portion 1a is provided. A primer is applied to the end of the insulating coating 15 as necessary in order to increase the adhesive force of the connecting end 13 to be integrated with the insulating portion 17.

  Subsequently, a molding die D composed of an upper die D1 and a lower die D2 for forming the connection end 13 is prepared (FIG. 5). The molding die D is made of a nonmagnetic material, and an orientation pin P made of a ferromagnetic material is embedded in order to form the conduction portion 16. One end of the orientation pin P is exposed on the cavity surface where the conductive portion 16 is formed. The end of the cable 12 on the side where the exposed portion 1a is formed is placed in the cavity of the molding die D, and a mixture L made of liquid rubber in which magnetic conductive particles are dispersed is injected (FIG. 6).

  Then, a magnetic field is applied to the molding die D to orient the magnetic conductive particles to form a portion that becomes the conductive portion 16 and the insulating portion 17, and then the mixture L in the cavity is heated and cured to thereby connect the conductive portion 16 and the insulating portion. 17 is formed and integrated with the cable 12 (FIG. 7). And it demolds from the metal mold | die D for shaping | molding, and obtains the cable 11 with a connection end (FIG. 4).

  Next, the mounting method of the cable 11 with a connection end is demonstrated (FIG. 8). Here, the board B is taken as an example of the member to be connected, and a method of mounting the cable 11 with the connection end on the board B using the pressing member F will be described.

  The pressing member F is a member that connects the connection end 13 to the substrate B. By providing the receiving member R on the substrate B, the holding member F can be engaged with the receiving member R, and the cable 11 with the connecting end can be fixed at a predetermined position on the substrate B. If an insulating material is used for the pressing member F, the conducting portion 16 can be prevented from causing unintended conduction with other members.

  The substrate B is made of glass fiber reinforced epoxy resin or the like and has a copper foil circuit pattern on its surface. In this circuit pattern, an insulating layer made of resist ink is provided in addition to the contact C for fixing an electronic component or the like. In addition, a receiving member R that forms an engagement structure with the pressing member F is provided. The receiving member R is provided at a position where the contact C on the substrate B contacts with the conduction portion 16 of the cable 11 with the connecting end when engaged with the pressing member F, and here the annular shape with the cable 12 side missing. (FIG. 10).

  For example, the pressing member F and the receiving member R are engaged with each other by forming an annular concave groove Fa on the outer periphery of the pressing member F, and forming a convex portion Ra that fits into the concave groove Fa on the receiving member R. In contrast, the pressing member F may be provided with a convex portion and the receiving member R may be provided with a concave groove (not shown).

  The pressing member F and the receiving member R are provided with engaging portions at positions where the connecting end 13 can be engaged in a compressed state (FIG. 8). In other words, the vertical length t2 from the surface of the substrate B to the center of the convex portion Ra is shorter than the vertical length t1 from the external contact surface 6a of the conductive portion 16 to the center of the concave groove Fa. Thus, the conductive portion 16 is pressed and crushed by the difference in length. Thus, by setting the connection end 13 to be compressed by a predetermined amount, the conduction resistance of the conduction portion 16 is reduced, and the thickness of the connection end 16 after mounting is further reduced. The connection end 13 is preferably compressed so that its thickness is reduced by 5 to 50%. If it is less than 5%, the effect of reducing the conduction resistance may be insufficient, and the effect of reducing the thickness will be small. On the other hand, even if it exceeds 50%, the conduction resistance may increase.

  In order to mount the cable 11 with connection end on the board B, the holding part F is put on the cable 11 with connection end and engaged with the receiving member R provided on the board B, so that the conduction part 16 is brought into contact with the contact C. At the same time, the connection end 13 is pressed and fixed to the substrate B (FIGS. 8 and 9).

  In the cable 11 with a connection end, the insulation coating 15 of the cable 12 and the insulating portion 17 of the connection end 13 are welded, and the cable 12 and the connection end 13 are integrated, so that the connection end 13 is detached from the cable 12. Is unlikely to occur. Moreover, since the connection end 13 has a simple structure made of a rubber-like elastic body, the size of the connection end 13 can be reduced, and the connection height between the cable 12 and the board B can be reduced.

  As one specific embodiment of the connecting end 13, when the diameter of the conducting portion 16 is 0.4 to 1.0 mm and the height (vertical length) of the connecting end 13 is 0.2 to 5 mm, the conducting portion 16 The resistance value of 16 can be 10 to 100 mΩ, and the current resistance of the conduction portion 16 can be 2.5 to 10 A.

1-1 Modification [FIG. 11]:
The cable 11a with a connection end of the present embodiment is different from the cable 11 with a connection end described in the previous embodiment in the exposed surface of the conductive portion 16. That is, as shown in FIG. 11, in the cable 11 a with connection end, the external contact surface 1 b 1 with the surface of the conductive portion 16 exposed only on one surface (lower surface) of the connection end 13 is formed. The surface of the conductive portion 16 is not exposed on both the upper and lower surfaces. By comprising in this way, the short circuit and leak through surfaces other than the surface which contacts a board | substrate can be prevented. In the case where a metal pressing member F is used for pressing the connection end 13, it is preferably used to prevent conduction between the pressing member F and the conduction portion 16.

Second Embodiment [FIGS. 12 to 18]:
The cable with connection end 21 of the present embodiment is an integrated cable 22 and connection end 23, but the cable 22 includes a plurality of conductive wires 24, and the connection end 23 includes a plurality of conduction portions 26. This is different from the cables with connection ends 11 and 11a of the previous embodiment.

  As shown in FIGS. 12 to 18, the cable 22 of the cable with connection end 21 has three conductive wires 24 covered with an insulating coating 25. That is, the first conductive wire 24a is covered with the first insulating coating 25a, the second conductive wire 24b is covered with the second insulating coating 25b, the third conductive wire 24c is covered with the third insulating coating 25c, and these are covered with the fourth insulating coating 25d. Covered. On the other hand, at the connection end 23 at the tip of the cable 22, three conductive portions 26 a, 26 b and 26 c are covered with an insulating portion 27.

  The three conductors 24 are positioned so that the cross-section thereof is the apex of a regular triangle, that is, in FIG. 14, the first conductor 24a is located at the center upper part, the second conductor 24b is located at the lower left part, and the third conductor 24c is located at the lower right part. As shown in FIGS. 15 to 18, the tip of the first conductor 24 a is shorter than the tips of the second conductor 24 b and the third conductor 24 c. On the other hand, the three conducting portions 26 are also located at the positions where the cross-sections are apexes of a regular triangle, that is, in FIG. Located at the bottom.

  With this arrangement, the first conductive wire 24a is conductively connected to the first conductive portion 26a, the second conductive wire 24b is conductively connected to the second conductive portion 26b, and the third conductive wire 24c is electrically connected to the third conductive portion 26c. It does not overlap, but is insulated from other connection parts. However, the above-described positions of the conductive wires 24 and the conductive portions 26 are examples, and can be arranged at arbitrary positions. However, the length of each conductive wire 24 is appropriately set according to the position of each conductive portion 26, and the contact portion thereof is It is necessary not to overlap each other.

  In the cable 21 with connection end, the three conductive wires 24 are conductively connected to the three conductive portions 26, and the conductive wires and the conductive portions are insulated from each other, so that the three conductive wires 24 are connected to the substrate B through the three conductive portions 26. The upper contact C can be conductively connected.

Third Embodiment [FIGS. 19 to 22]:
The cable 31 with a connection end of the present embodiment includes a coaxial cable 32 having a center conductor 34 a and a shield wire 34 b surrounding the center conductor 34 a as a conductor 34, and a connection end 33 integrated with the cable 32. Yes.

  The center conducting wire 34a and the shield wire 34b are provided concentrically in a cross section perpendicular to the length direction of the cable 32. At the end of the cable 32, an exposed portion 3a1 from which a central conducting wire 34a protrudes is formed. The central conductor 34a is covered with a first insulating coating 35a, and the end of the first insulating coating 35a is exposed. The first insulating coating 35a is also surrounded by a shield wire 34b, and the shield wire 34b also has an exposed portion 3a2 with an exposed end. The shield wire 34 b is covered with a second insulating coating 35 b except for the exposed portion 3 a 2, and the second insulating coating 35 b is an outer jacket of the cable 32.

  The exposed lengths of the exposed portion 3a1 of the central conducting wire 34a and the exposed portion 3a2 of the shielded wire 34b are exposed to the extent that they can be conductively connected to the respective conducting portions 36. Surface) is preferably in contact with each conducting portion 36, and more preferably exposed to the same extent as the diameter of each conducting portion 36. Therefore, the length of the exposed portion 3a1 that contacts the first conductive portion 36a is preferably approximately the same as the diameter of the first conductive portion 36a, and the length of the exposed portion 3a2 that contacts the second conductive portion 36b is It is preferable that the thickness be equal to the thickness of the second conductive portion 36b.

  The central conductor 34a and the shield wire 34b can be made of the same material as that of the conductor 14 described in the first embodiment, but the shield wire 34b can also be made of a metal foil. The shield wire 34b is laminated on the first insulation coating 35a as a braid or winding using a plurality of strands as necessary. When a metal foil is used, the shield wire 34b of the first insulation coating 35a is laminated. Wrap it so that there are no gaps around it.

  When the center conductor 34a and the shield wire 34b are configured, it is preferable to set the characteristic impedance to be about 50Ω. The characteristic impedance can be adjusted by the dielectric constant of the first insulating coating 35a provided between the center conducting wire 34a and the shield wire 34b and the diameter of each conducting wire 34a, 34b.

More specifically, this characteristic impedance can be calculated using the following equation (1). In the formula (1), “Z0” is a characteristic impedance, “ε _r ” is a relative dielectric constant of an insulator 37 to be described later, “D” is an inner diameter of the shield wire 34b, and “d” is the center conductor 34a. Diameter. Therefore, when silicone rubber having a relative dielectric constant of 2.7 is used as the insulator and the characteristic impedance is 50Ω, D / d is 3.94 from the equation (1). Therefore, when the diameter of the central conductor 34a is 0.5 mm, the inner diameter of the shield wire 34b may be 2.0 mm.

Z ₀ = 138 / (ε _r ) ^0.5 × log ₁₀ (D / d) Equation (1)

  The conducting part 36 constituting the connection end 35 is also composed of two conducting parts 36, a first conducting part 36a and a second conducting part 36b. The first conducting portion 36a is formed in a cylindrical shape, penetrates up and down at the center of the connection end 33, and is electrically connected to the central conducting wire 34a at the conducting wire contact portion 3c1. On the other hand, the second conducting portion 36b is formed in a cylindrical shape (ring shape) concentric with the central axis of the central conducting wire 34a, penetrates the connection end 33 vertically, and is connected to the shield wire 34b by the conducting wire contact portion 3c2. Conductive connection. An insulating portion 37 is provided between the first conducting portion 36a and the second conducting portion 36b and outside the second conducting portion 36b. By forming in this way, the second conduction part 36b can be made to act as a shield, so that noise of a signal flowing through the first conduction part 36a can be suppressed.

3-1 Modification [FIG. 23]:
The cable 31a with connection end of the present embodiment is different from the cable 31 with connection end described in the previous embodiment in the exposed surface of the first conduction portion 36a. That is, as shown in FIG. 23, the cable 31a with connection end has an external contact surface 3b1 in which the surface of the first conducting portion 36a is exposed only on one surface of the connection end 33. Further, the surface of the first conductive portion 36a is not exposed on both the upper and lower surfaces. That is, in the cable 31a with connection end, an insulating member 38 that covers the surface of the first conduction portion 36a is provided on the upper surface of the connection end 33. The insulating member 38 can be formed of the same material as the insulating coating 35 and the insulating portion 37, which are insulating materials, or other insulating hard resin.

  By providing the insulating member 38, it is possible to prevent the first conducting portion 36a from contacting other members on the upper surface side and causing unintended conduction. For example, when a metal pressing member F is used to press the connection end 33, it is suitable for preventing conduction between the pressing member F and the first conduction portion 36a. The insulating member 38 may be made of an insulating material, and the same material as the insulating portion 37 can be used.

  Since the insulating member 38 does not cover the second conductive portion 36b, if a conductive material is used for the pressing member F, the pressing member F and the second conductive portion 36b can be electrically connected. A shield structure including F can be adopted. However, from the viewpoint of avoiding conduction between the first conduction portion 36a and the second conduction portion 36b and avoiding exposure of the second conduction portion 36b, the insulating member 38 is configured to cover the second conduction portion 36b. May be.

3-2 Modification [FIG. 24]:
In addition to the configuration of the cable with connection end 31a described in the previous embodiment, the cable with connection end 31b of the present embodiment further includes a cover member 39 on the entire upper surface of the connection end 33. That is, as shown in FIG. 24, the cable 31 b with connection end includes an insulating member 38 and a cover member 39 on the upper surface of the connection end 33.

  The cover member 39 can be made of a conductive material such as a conductive resin or a thin metal plate. By using a conductive material for the cover member 39, the cover member 39 can function as a contact for contacting with other components. Further, the cover member 39 and the second conduction portion 36b can be conductively connected. As a result, not only the side surface of the first conductive portion 36a is covered with the conductive second conductive portion 36b, but also the top surface thereof is covered with the conductive cover member 39, and in all directions except the substrate side. By providing a shield, a cable with a connection end that is more resistant to noise can be obtained.

3-3 Modification [FIG. 25]:
In addition to the configuration of the cable with connection end 31 described in the previous embodiment, the cable with connection end 31c of this embodiment includes metal thin plates 40a and 40b on the lower surface of the connection end 33 as shown in FIG. Yes. If the paste solder is applied to the contact point C of the circuit pattern on the substrate B corresponding to the metal thin plates 40a and 40b, and the cable 31c with connection ends is arranged so that the metal thin plates 40a and 40b are in contact with the solder. By putting this in the reflow furnace, the cable 31c with the connecting end can be mounted on the board B. The mounted cable 31c with connection end can be electrically connected to the contact C of the circuit pattern through the thin metal plates 40a and 40b fixed by solder.

  In manufacturing the cable 31c with connection end, the metal thin plates 40a and 40b can be arranged at predetermined positions in the mold D and fixed to the lower surface of the connection end 33. Although the metal thin plates 40a and 40b may be arranged alone, the metal thin plates 40a and 40b may be arranged with a separator attached thereto. If a separator is used, generation | occurrence | production of the thin burr | flash formed by liquid rubber flowing into the clearance gap between the metal mold | die D and the metal thin plates 40a and 40b can be suppressed. In addition, although various materials can be used for the separator, a resin film having a slightly adhesive surface is preferable.

3-4 Modification [FIG. 26]:
The cable 31d with connection end of the present embodiment is different in configuration of the connection end 33 from the cable 31 with connection end described in the previous embodiment. That is, as shown in FIG. 26, the cable 31d with connection end has the same configuration as the cable 31 with connection end on the lower surface side with the center of the cable 32, but the upper surface side is made of an insulating material. An insulating member 38a is formed.

  For the insulating member 38a, the same material as that of the insulating portion 37 can be used, and a hard resin can also be used. The reason why hard resin can be used for the insulating member 38a is as follows. The insulating portion 37 needs to be compressed by a predetermined amount together with the conducting portions 36a and 36b in order to reduce the conducting resistance of the conducting portions 36a and 36b, whereas the insulating member 38a needs to be contracted due to such compression. Because there is no.

  The cable 31d with connection end is easy to manufacture because it is not necessary to simultaneously form the conductive portion 36 and integrate the connection end 33 and the cable 32. That is, first, the lower surface side of the connection end 33 including the first conductive portion 36a, the second conductive portion 36b, and the insulating portion 37 is formed. At this time, a cable recess in which the cable 32 is installed is formed on the upper surface. The concave portion for the cable may be the same as the tip shape of the cable 32 or may be smaller than the tip shape. It is preferable to use magnetic field orientation for the formation of the first conducting portion 36a and the second degree conducting portion 36b. Next, after setting the lower surface side connection end in the mold and arranging the cable 32, the front edge member 38a is integrated with the lower surface side connection end, whereby the cable 31d with connection end can be obtained.

3-5 Modification [FIG. 27]:
The cable 31e with connection end of the present embodiment also has the coaxial cable 32, but the connection structure with the connection end 33 is different from the cable 31 with connection end described in the previous embodiment. That is, as shown in FIG. 27, in the cable 31e with connection end, the tip of the cable 32 is cut obliquely, and the connection end 33 also has an internal shape corresponding to the tip shape of the cable 32. ing.

  In order to manufacture the cable 31e with a connection end, the entire cable 32 which is a coaxial cable is cut obliquely. On the other hand, the connection end 33 has a conduction portion 36 and an insulation portion 37, and a lower connection end 33a that contacts the cut surface of the cable 32 is manufactured in advance by molding or the like. Then, in a state where the lower connection end 33 a is in contact with the cable 32, the upper connection end 33 b that becomes the insulating portion 37 is formed and integrated as a whole.

  According to the cable 31e with a connecting end, the shield wire 34b and the second conducting portion 36b are configured to cover the center conducting wire 34a and the first conducting portion 36a, and therefore shield in all directions except the board side. Thus, a connection structure resistant to noise can be obtained.

3-6 Modification [FIG. 28]:
The cable 31f with connection end of the present embodiment also has a coaxial cable 32. The connection structure between the cable 32 and the connection end 33 is the same as that of the cable 31 with connection end (FIG. 22). Is different from the cable 31 with a connection end in that the height (length in the vertical direction) is substantially the same as the thickness of the cable 32.

  The connection end-attached cable 31f is preferable in that it can be bottomed to the same extent as the thickness of the cable 31. However, when compression compression (the length that is compressed and crushed) when compressing the connection end 33 by pressing is necessary, by forming the connection end 33 thicker than the thickness of the cable 32 by that thickness, At the time of mounting, the thickness of the connection end 33 can be made equal to the thickness of the cable 32.

Fourth Embodiment [FIG. 29]:
As shown in FIG. 29, the cable with connection end 41 of the present embodiment has a connection portion (substrate connection portion) to the board B in addition to the cable and the connection end that are constituent members of the cable with connection end described above. The structure further includes a part like the member F.

  Here, the cable 41 with connection end includes a pressing member F having a concave groove Fa with the conductive cover member 39 sandwiched between the cable 31a with connection end described above. Since the cable 41 with a connection end has the pressing member F, it can be easily mounted on the board B.

Other variations:
In the said embodiment, although it was set as the cable with a connection end which provided the connection end at the end of a cable, it is good also as a thing provided with a connection end at the both ends of a cable. Further, one end of the cable may be provided with any of the above connection ends, and the other end may be provided with a conventional connector.

  The holding member F may be an insulating material or a conductive material. However, if the holding member F is a conductive material, the function of the cover member 39 described in the 3-2 modification can be achieved. Even if it is a cable with a connection end which is not provided, the noise of a 1st conduction | electrical_connection part can be suppressed.

  In the molding die D, one end of the orientation pin P is exposed on the cavity surface, but a molding die in which one end of the orientation pin P is not exposed on the cavity surface may be used.

  In order to increase the adhesive force between the conductive wire and the insulating coating and the adhesive force between the metal thin plate and the insulating portion, a primer can be applied to the surfaces thereof.

  The contact portion between the conductor of the cable and the conductive portion of the connection end can be configured to have a widened portion at the tip of the conductor so that the connection area is widened. This is because the leading end of the conducting wire has a so-called tapered shape, and the resistance value can be lowered by increasing the contact area between the conducting wire and the conducting portion, and the conducting wire can be made difficult to come off from the connection end.

  Although the description has been given assuming that the concave groove Fa serving as the engagement portion with the substrate B is provided in the pressing member F or the connector portion O, such an engagement portion may be provided in the insulating portion of the connection end. However, since the insulating portion is made of a rubber-like elastic body and is soft, it is preferable that the concave groove Fa is formed of a hard material such as a hard resin.

  The pressing member F is used as a member having a function of only pressing the connection end, and a casing or the like of an electronic device including the substrate B is used as the pressing member F, and the connection end is provided between the casing and the substrate B. By sandwiching, the cable with connection end and the board B can be conductively connected.

[First Embodiment]
1a (conductive wire) exposed portion 1b (conductive portion) external contact surface 1c (conductive portion) conductive wire contact portion 1d (insulating portion) fixing portion 1e (insulating portion) extension portion 11 cable with connection end 12 cable 13 connection End 14 Conductor 15 Insulation coating 16 Conducting portion 17 Insulating portion B Substrate C Contact point F Holding member Fa Groove groove R Receiving member Ra Convex portion D Mold D1 Upper die D2 Lower die P Orientation pin L Mixture 11a Cable with connection end (1- 1 modification)
1b1 External contact surface (of the conducting part) [second embodiment]
2a1-2a3 (each conductive wire) exposed portion 2b1-2b3 (each conductive portion) external contact surface 2c1-2c3 (each conductive portion) conductive wire contact portion 2d (insulating portion) fixing portion 2e (insulating portion) extension DESCRIPTION OF SYMBOLS 21 Cable with connection end 22 Cable 23 Connection end 24 Conductor 24a 1st conductor 24b 2nd conductor 24c 3rd conductor 25 Insulation coating 25a 1st insulation coating 25b 2nd insulation coating 25c 3rd insulation coating 25d 4th insulation coating 26 Conducting part 26a 1st conduction | electrical_connection part 26b 2nd conduction | electrical_connection part 26c 3rd conduction | electrical_connection part 27 Insulation part [3rd Embodiment]
3a1, 3a2 Exposed portion (for each conductive portion) 3b1, 3b2 (for each conductive portion) External contact surface 3c1, 3c2 (for each conductive portion) Conductive contact portion 3d (for insulating portion) Fixed portion 3e (for insulating portion) Extension portion 31 Cable with Connection End 32 Cable 33 Connection End 34 Conductor 34a Center Conductor 34b Shield Wire 35 Insulation Cover 35a First Insulation Cover 35b Second Insulation Cover 36 Conducting Portion 36a First Conducting Portion 36b Second Conducting Portion 37 Insulating Portion 31a Connection End With cable (3-1 modification)
38 Insulating member 31b Cable with connection end (3-2 modification)
39 Cover member 31c Cable with connection end (3-3 modification)
40a, 40b Metal thin plate 31d Cable with connection end (3-4 modification)
38a Insulating member 31e Cable with connection end (3-5 modification)
33a Lower connection end 33b Upper connection end 31f Cable with connection end (3-6 modification)
[Fourth Embodiment]
41 Cable with connection end

Claims (11)

A cable with a connection end comprising a cable and a connection end that contacts a connection target member at an end of the cable,
The cable has a conductive wire and an insulating coating covering the conductive wire,
The connection end has a conductive part made of conductive rubber and an insulating part made of insulating rubber covering the conductive part,
The conducting portion has an external contact surface exposed on the surface, and a conductor contact portion that contacts the conductor.
The insulating part is a cable with a connecting end having a fixing part that is fixed to the insulating coating.
The cable with a connection end according to claim 1, wherein the external contact surface is formed substantially parallel to the length direction of the conducting wire.
The cable with a connection end according to claim 1 or 2, wherein the cable is an integrally formed body of the cable and the connection end.
The cable with a connection end according to any one of claims 1 to 3, wherein the conducting portion is formed of magnetic conductive particles oriented in an insulating rubber-like elastic body.
The cable with a connection end according to any one of claims 1 to 4, wherein the conductor contact portion is in contact with a peripheral surface of the conductor.
The cable with a connection end according to any one of claims 1 to 5, comprising a plurality of the conducting wires.
The conducting wire is a central conducting wire and a shield wire surrounding the central conducting wire,
7. The device according to claim 1, further comprising: a first conducting portion that is electrically connected to the central conducting wire, and a second conducting portion that is insulated from the first conducting portion and is electrically connected to the shield wire. Cable with connection end as described in section.
The said 2nd conduction | electrical_connection part is a cylindrical shape, The electroconductive cover member which cross | intersects the said 2nd conduction | electrical_connection part and contacts the said 2nd conduction | electrical_connection part and a ring shape, but does not contact a 1st conduction | electrical_connection part is provided. 7. A cable with a connection end according to 7.
The cable with a connection end according to any one of claims 1 to 8, further comprising a pressing member having a board connection portion that engages with the board.
A cable connection structure for connecting the cable with a connection end according to any one of claims 1 to 9 to a substrate including a contact,
A cable connection structure in which the connection end is compressed by 5 to 50% between a pressing member and the substrate, and is pressed and fixed in a state in which the external contact surface of the conductive portion is in contact with the contact.
The conducting wire is a central conducting wire and a shield wire surrounding the central conducting wire,
The said connection end is equipped with the 1st conduction | electrical_connection part which is electrically connected with the said center conducting wire, and is a column shape, and is provided with the 2nd conduction | electrical_connection part which is a cylindrical shape insulated from the said 1st conduction | electrical_connection part and electrically connected with the said shield wire. The cable connection structure described.

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