JP5678940B2 - Flat cable and manufacturing method thereof - Google Patents

Description

  The present invention relates to a flat cable used for wiring of an electronic device or the like and a manufacturing method thereof.

  As a wiring member capable of high-density wiring in a limited space, insulation that fixes a conductor composed of a plurality of tin-plated annealed copper foils arranged at predetermined intervals and the conductor so as to be sandwiched from both sides A flat cable having a covering portion made of a tape is used (for example, see Patent Document 1).

Japanese Unexamined Patent Publication No. 2012-28745

  By the way, when using such a flat cable, it is necessary to expose a conductor in the flat cable and electrically connect it to a terminal of a connection partner. For this reason, the flat cable of Patent Document 1 has a conductor exposed at its end, and is connected to another substrate having a connected terminal row. The conductor in the flat cable is electrically connected to the terminal of the connection partner via this connected terminal row.

By the way, in the above flat cable, a window portion is provided at a predetermined interval on at least one side of the insulating tape sandwiching the conductor, and the conductor and the insulating tape are cut at this window portion, so that the conductor is exposed at the end portion. The connection electrode portion thus formed was formed. However, in this method, the length of the desired flat cable must be determined in advance, and the interval between the windows provided on the insulating tape must be determined according to the length of the flat cable. For this reason, in order to create various types of flat cables having different lengths, it is necessary to prepare insulating tapes having different window intervals for each type, which increases the manufacturing cost.
Further, in the above flat cable, when there is no reinforcing plate, there is a possibility that the conductor is easily bent at the end of the insulating tape and may be disconnected.

  The objective of this invention is providing the flat cable which can be produced at low cost, and there is no possibility of a disconnection, and its manufacturing method.

The flat cable of the present invention capable of solving the above problems is
A plurality of conductors arranged on a plane, and an insulating film attached to the conductors from both sides of the conductor arrangement surface, the longitudinal ends of the conductors extending from the longitudinal ends of the insulating film. The cable body,
A connection member affixed to one side of the longitudinal end of the cable body,
The connecting member is
The same number of connection conductors as the conductors;
A connection base material affixed to one surface of the connection conductor;
A reinforcing plate having higher rigidity than the connection substrate,
The conductor and the connection conductor are electrically connected via a conductive paste,
The reinforcing plate is affixed across the surface of the connection base opposite to the surface on which the connection conductor is present and the insulating film.

  In the present invention, a protective film may be provided to cover the other surface of the conductor.

Moreover, the manufacturing method of the flat cable of this invention which can solve the said subject is as follows.
Create a long flat cable extending in the longitudinal direction by laminating an insulating film on the conductor from both sides of the conductor arrangement surface to a plurality of conductors arranged on a plane,
Cut the long flat cable into the desired length to create a short flat cable,
At the longitudinal end of the short flat cable, the cable is peeled off to expose the conductor and create the cable body,
A connection base, a reinforcing plate affixed to one surface of the connection base so that a part of the connection base is higher in rigidity than the connection base, and the other of the connection base Creating a connecting member having the same number of connecting conductors as the conductor provided on the side surface;
Affixing the connecting member to the longitudinal end of the cable body so that each exposed conductor and the connecting conductor of the connecting member are electrically connected via a conductive paste,
A part of the reinforcing plate protruding from the connection base material is pasted on the insulating film so that the reinforcing plate straddles the insulating film and the connection base material.

In the present invention, the connection conductor may be plated with gold.
Furthermore, before affixing the connection member on the longitudinal end of the cable body, a conductive paste may be placed on each of the plurality of connection conductors.
After depositing the conductive paste on the connection conductor, an adhesive may be deposited on the connection substrate between the connection conductors arranged in parallel.
Or you may heat the thermoplastic adhesive which has fixed the said connection conductor to the said connection base material. Moreover, you may affix the said connection base material to the said insulating film. Furthermore, you may affix a protective film so that the surface of the other side of the said conductor may be covered.
In addition, the protective film includes a base layer and an adhesive layer, and the protective film covers the conductor by heating the thermoplastic adhesive that fixes the connection conductor to the connection base material and the adhesive layer of the protective film. May be bonded to the connecting member.

  According to the flat cable which concerns on this invention, since the reinforcement board is provided so that an insulating film and a connection base material may be straddled, it can provide the flat cable which a conductor does not bend easily and is hard to disconnect.

  Further, according to the flat cable manufacturing method of the present invention, the long flat cable is cut into a desired length, and then the connecting member is attached to the longitudinal end, so that the conductor is connected to the connection partner via the connecting conductor. It is in a state where it can be electrically connected. Accordingly, even when various types of flat cables having different lengths are created, it is not necessary to stock the flat cable material that has been cut into a desired length in advance, and the manufacturing cost can be reduced. Moreover, since a reinforcement board is affixed so that an insulating film and a connection base material may be straddled, the flat cable which cannot bend easily and cannot be disconnected can be provided.

It is a top view which shows one Embodiment of a flat cable. It is a sectional side view of a flat cable. It is a cross-sectional view at one end of the flat cable. It is side sectional drawing of the connection part of a flat cable and a connector. It is a top view of the other example of the connection part of a flat cable and a connector. It is a perspective view explaining the manufacturing method of a long flat cable. It is a sectional side view of the cable main body in the middle of manufacture. It is a sectional side view of the cable main body in the middle of manufacture. It is a top view of the cable main body in the middle of manufacture. It is a perspective view explaining the preparation methods of a elongate connection member. It is a top view of the connection member in the middle of manufacture. It is a perspective view of the connection member in the middle of manufacture. It is a perspective view of the connection member in the middle of manufacture. It is a perspective view explaining the bonding process of a cable main body and a connection member. It is a perspective view explaining the bonding process of a cable main body and a connection member. It is a perspective view explaining the bonding process of a cable main body and a connection member. It is sectional drawing explaining the bonding process of a cable main body and a connection member. It is sectional drawing explaining the bonding process of the cable main body and connection member based on other embodiment.

Hereinafter, an example of an embodiment of a flat cable and a manufacturing method thereof according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the flat cable 1 includes a long cable body 10 and a connection member 21 attached to the longitudinal end portion 11 of the cable body 10.

  The cable body 10 includes a plurality of flat conductors 2 made of, for example, rolled copper foil of copper (including plated copper) or copper alloy. A plurality of these rectangular conductors (conductors) 2 are arranged on the arrangement surface at a predetermined parallel pitch, and insulating films 3a and 3b are attached (laminated) to the upper and lower surfaces of the arrangement surface of the rectangular conductors 2, respectively. ing. In addition, although the example which has the four rectangular conductors 2 is shown in FIG. 1, the number of the rectangular conductors 2 is changed suitably. For example, the number of flat conductors 2 may be 20. Moreover, the width dimension, thickness dimension, and parallel pitch of the flat conductor 2 are set according to the current value and the like.

  The insulating films 3a and 3b are made of a base material portion formed from a resin such as polyethylene terephthalate, polyester, polyimide or polyphenylene sulfide, and a polyester adhesive or a flame retardant polyvinyl chloride insulating adhesive or a flame retardant polyolefin. It has an adhesive layer. Two insulating films 3a and 3b are bonded to the flat conductor 2 with the adhesive layer faced. Thus, electrical insulation between the rectangular conductors 2 is achieved. The thicknesses of the insulating films 3a and 3b are preferably 0.02 mm or more and 0.15 mm or less, respectively.

  At the longitudinal end 11 of the cable body 10, a part of the flat conductor 2 protrudes and extends from the insulating films 3a and 3b. These protruding rectangular conductors 2 serve as connection electrodes 12. In addition, a connection member 21 is attached to a surface on one side (upper side in the example of FIG. 2) of the connection electrode 12 at the longitudinal end portion 11 of the cable body 10.

  The connection member 21 includes the same number of connection conductors 23 as the flat conductors 2, a connection base material 22, and a reinforcing plate 24. The connection conductors 23 are conductors extending along the longitudinal direction of the flat cable 1, and are arranged in a line on the other side (lower side in the example of FIG. 2) of the connection base material 22. The connection conductor 23 is formed from one end to the other end of the connection base material 22 in the longitudinal direction. The connection conductors 23 are arranged at the same pitch with substantially the same width dimension W1 as the connection electrodes 12 at the longitudinal ends 11. These connection conductors 23 are made of a rolled copper foil of copper or a copper alloy. The surface of the connection conductor 23 other than the portion in contact with the connection base material 22 is plated with gold.

  The connection member 21 is bonded to the longitudinal end portion 11 of the cable body 10. The connection electrode 12 and the connection conductor 23 are electrically connected by the conductive paste 15, and the insulating film 3 a and the connection base material 22 are bonded by the adhesive 16.

  The conductive paste 15 is composed of conductive particles and an adhesive. As the conductive particles, for example, silver powder, carbon powder, copper powder, nickel powder, or a mixed powder thereof can be used. As the adhesive constituting the conductive paste 15, for example, any of a polyester adhesive, a polyurethane adhesive, an epoxy adhesive, and the like can be used. In particular, as the conductive paste 15, a silver paste including a flaky silver powder having an average particle diameter of 0.5 to 5 μm and a spherical silver powder having an average particle diameter of 20 nm or less coated with an organic substance on the surface is employed. Is preferred. By including nano silver particles in the silver paste, the connection resistance is lowered, and the surface irregularities are also reduced, thereby increasing the connection area. For this reason, the reliability of electrical connection is improved.

  Further, as the adhesive 16, for example, a polyester-based or polyamide-based hot melt adhesive having a melting temperature of about 100 to 170 ° C is used. As this adhesive 16, JELCONAD-HM6 manufactured by Jujo Chemical Co., Ltd., PES310S30 manufactured by Toa Gosei Co., Ltd., PES375S40 manufactured by the same company, EG series manufactured by Teikoku Mfg. Co., Ltd., ERX series manufactured by the same, etc. can be employed.

  As shown in FIG. 3, the conductive paste 15 is applied so that the width dimension W <b> 2 of the connection electrode 12 and the connection conductor 23 in the arrangement direction is smaller than the width dimension W <b> 1 of the connection electrode 12 and the connection conductor 23. Thus, the conductive paste 15 is not applied to the end portions (shoulders 12a and 23a) in the width direction of the connection electrode 12 or the connection conductor 23. Part of the adhesive 16 also reaches the shoulder 12a or 23a where the conductive paste 15 is not applied. Thereby, the part which the connection electrode 12 and the connection conductor 23 contact with the electrically conductive paste 15 becomes the range below each width dimension. Then, an adhesive is filled between the connection electrodes 12 and between the connection conductors 23 so that they are not short-circuited via the conductive paste 15.

  As shown in FIG. 4, the protective film 14 is provided on the other surface of the connection electrode 12 exposed from the longitudinal end 11 of the cable body 10, that is, on the surface opposite to the connection member 21 of the connection electrode 12. It is pasted. The protective film 14 is affixed so as to cover the connection electrode 12, and prevents the connection electrode 12, the adhesive 16, and the conductive paste 15 from peeling off. Moreover, it is preferable that a part of the protective film 14 is affixed also to the insulating film 3a. Thereby, the bending of the connection electrode 12 can be prevented more reliably.

  In the flat cable 1 according to the above-described embodiment, as shown in FIG. 4, the connection terminal 21 accommodated in the housing 28 of the connector 27 by inserting the connection member 21 connected to the longitudinal end portion 11 into the connector 27. 29 is conducted through the connection conductor 23 of the connection member 21.

  In this flat cable 1, since the portion other than the portion of the connection conductor 23 of the connection member 21 that is in contact with the connection base material 22 is covered with gold plating, the connection conductor is protected even if it receives compressive stress from the connection terminal 29 of the connector 27. There is no problem that acicular crystals (whiskers) are generated on the surface of 23 and short-circuited between adjacent connection conductors 23. That is, the reliability of electrical connection with the connector 27 is good.

  The reinforcing plate 24 of the connection member 21 will be described with reference to FIG. The reinforcing plate 24 is bonded to the surface of the connection base 22 opposite to the surface on which the connection conductor 23 is provided. The reinforcing plate 24 is formed of a material having higher rigidity than the connection base material 22. For example, the reinforcing plate 24 can be formed of a resin such as polyethylene terephthalate, and the thickness is preferably 0.03 mm or more and 0.30 mm or less.

  The reinforcing plate 24 is bonded to the connection base material 22 with the end 24 a on the insulating film 3 b side protruding from the connection base material 22. That is, the end 24 a of the reinforcing plate 24 protrudes closer to the insulating film 3 b than the end 22 a of the connection base material 22 and the end 23 a of the connection conductor 23. Moreover, the edge part 24a which protruded from this connection base material 22 to the insulating film 3b side is affixed on the insulating film 3b. Thus, the reinforcing plate 24 is affixed across the connection base material 22 of the connection member 21 and the insulating film 3b of the cable body 10. It is preferable that a thermoplastic adhesive (for example, a polyester-based adhesive) is applied to the surface of the reinforcing plate 24 to be bonded to the connection base material 22. With this adhesive, the reinforcing plate 24 can be attached to the insulating film 3b.

  By the way, at the boundary B where the flat conductor 2 is exposed from the insulating films 3a and 3b, the flat conductor 2 is easily bent by an external force and may be disconnected. Therefore, as shown in FIG. 4, in the flat cable 1 according to this embodiment, the reinforcing plate 24 is attached to the connection base material 22 so as to straddle the boundary B. As a result, the bending of the flat conductor 2 at the boundary B is suppressed and disconnection is prevented. Thereby, the flat cable 1 in which the flat conductor 2 is hard to be disconnected can be provided.

  As shown in FIG. 5, the connection member 21 may be a pitch conversion type connection member 21 formed so that the pitch of the connection conductors 23 is converted between the flat cable 1 side and the connector 27 side. Thereby, even when the parallel pitch of the flat conductors 2 of the flat cable 1 and the pitch of the terminals of the connector 27 are different, the flat cable 1 and the connector 27 can be electrically connected. In FIG. 5, an example in which the pitch is narrowed from the flat cable 1 to the connecting member 21 is illustrated, but the pitch may be widened from the flat cable 1 to the connecting member 21.

Next, a method for manufacturing the flat cable 1 having the above structure will be described.
First, the cable body 10 is created. As shown in FIG. 6, the rectangular conductors 2 are fed out from a plurality of reels 30 around which the long rectangular conductors 2 are wound, and arranged on the same plane at a predetermined parallel pitch. Then, the long insulating films 3 a and 3 b are sent out from the reel 31 to both sides of the arrangement surface of the flat conductors 2. A thermoplastic adhesive is applied to one side of each of the insulating films 3a and 3b.

  Then, the flat conductor 2 and the insulating films 3a and 3b sandwiching the flat conductor 2 are passed through a pair of heater rollers 32, and the insulating films 3a and 3b are heated and simultaneously pressed and bonded to form a long flat cable 10a. The long flat cable 10 a is wound around the winding roller 33.

  The long flat cable 10a thus obtained is cut at a desired length to obtain a short flat cable 10b. As shown in FIG. 7, the insulating films 3a and 3b in the vicinity of both ends of the short flat cable 10b are cut from both sides by a cutter 37 such as a cutter or a laser. Further, as shown in FIG. 8, the insulating films 3a and 3b on the end side from the cut portion are pulled out and removed, and the flat conductor 2 is exposed at both ends of the short flat cable 10b to form the connection electrode 12, as shown in FIG. A cable body 10 as shown is obtained.

Next, a method for creating the connection member 21 will be described.
As shown in FIG. 10, the rectangular conductors 61 are sent out from a plurality of reels 62 around which a plurality of long rectangular conductors 61 to be the connection conductors 23 are wound, and are arranged on the same plane at a predetermined parallel pitch.

  Then, a long connection base material 22 such as a polyethylene terephthalate (PET) film is fed out from the reel 63 and superposed on one side of these flat conductors 61 (connection conductors 23). In a state where the connection base material 22 and the rectangular conductor 61 are overlapped with each other, these are passed between the heater rollers 64, and the connection base material 22 is heated and simultaneously pressed and attached to the flat conductor 61. Similarly to the insulating films 3a and 3b, a thermoplastic adhesive is applied to one side of the connection base material 22 as well. In this way, the long connection member 21 a is produced, and the long connection member 21 a is wound around the winding roller 66. Further, gold plating is applied to the exposed surface of the flat conductor 61 (connection conductor 23) attached to the connection base material 22, and gold plating is performed on portions other than the portion in contact with the connection base material 22 of the connection conductor 23.

  After that, as shown in FIG. 11, the long connection member 21a is cut with a cutter for each predetermined length to create the short connection member 21b. Next, as shown in FIG. 12, the end 24a is longer than the end 22a of the connection base material 22 and the end 23a of the connection conductor 23 on one surface (the lower surface in FIG. 12) of the short connection member 21b. The reinforcing plate 24 is pasted so as to protrude in the direction, and the connecting member 21 is created. Note that FIGS. 12 to 17 are interchanged with the diagrams shown in FIGS. That is, in FIGS. 12 to 17, the lower side in the figure is the upper side in FIGS.

  As shown in FIG. 13, the conductive paste 15 is applied to the other surface (the upper surface in FIG. 12) of the connection conductor 23 of the connection member 21, and further adhered to the region of the upper surface of the connection member 21 excluding the conductive paste 15. Agent 16 is applied. Moreover, the adhesive 16a is applied to the upper surface (the surface on the same side as the connection conductor 23) of the portion protruding from the connection base material 22 of the reinforcing plate 24 as necessary. If an adhesive is already applied to the reinforcing plate 24, it is not necessary to further apply the adhesive 16a.

  Next, as shown in FIG. 14, the connection member 21 is attached to the longitudinal end of the cable body 10 so that the connection electrode 12 and the connection conductor 23 are electrically connected via the conductive paste 15. At this time, a part of the reinforcing plate 24 protruding from the connecting base material 22 is applied to the adhesive 16a or the reinforcing plate 24 so that the reinforcing plate 24 straddles the insulating film 3b and the connecting base material 22. Affixed to the insulating film 3b with an adhesive. Thereby, as shown in FIG. 4, the rectangular conductor 2 exposed from the insulating films 3 a and 3 b which are easily bent is protected by the reinforcing plate 24. At this time, it is preferable that the connection base material 22 is formed of a transparent member because the connection conductor 23 and the connection electrode 12 can be easily aligned.

  Furthermore, as shown in FIG. 15, the protective film 14 is affixed on the connection electrode 12 so that the connection electrode 12 exposed from the insulating film 3a may be covered. Thereby, peeling of the conductive paste 15 that makes the connection electrode 12 and the connection conductor 23 conductive can be prevented, and the connection state between the connection electrode 12 and the connection conductor 23 is well maintained. The flat cable 1 as shown in FIG. 16 is completed by the above process.

  At this time, as shown in FIG. 17A, it is preferable to deposit the conductive paste 15 higher than the adhesive 16 on the upper surface of the connection conductor 23 of the connection member 21. Thus, after the conductive paste 15 in FIG. 17B contacts the connection electrode 12, the adhesive 16 wraps around between the connection electrodes 12. Thereby, even if the adhesive 16 spreads, conduction between the connection electrode 12 and the connection conductor 23 is not hindered. Therefore, the cable body 10 and the connection member 21 can be bonded together while the connection electrode 12 and the connection conductor 23 are reliably conducted.

  At this time, since the width dimension W2 of the conductive paste 15 is smaller than the width dimension W1 of the connection electrode 12 and the connection conductor 23 (see FIG. 3), even if the conductive paste 15 is crushed and spread sideways. Even if it is within the width of the connection electrode 12 or the connection conductor 23 or slightly protrudes, it is pressed into the adhesive 16 and does not reach the adjacent connection electrode 12 or connection conductor 23. That is, the trouble that the conductive paste 15 short-circuits between the adjacent connection electrodes 12 or between the adjacent connection conductors 23 is also prevented.

  According to the manufacturing method of the flat cable 1 according to the above-described embodiment, the reinforcing plate 24 is pasted so as to straddle the insulating film 3b and the connection base material 22. Thereby, as shown in FIG. 4, the rectangular conductor 2 exposed from the insulating films 3 a and 3 b which are easily bent is protected by the reinforcing plate 24. Therefore, the flat cable 1 in which the flat conductor 2 is hard to be disconnected can be provided.

  In addition to the manufacturing method according to the present embodiment described above, a terminal is provided at a predetermined interval on at least one side of the insulating film that sandwiches the conductor, and the conductor and the insulating film are cut at the window to thereby terminate the terminal. The cable body with the conductor exposed can be created. However, in such a method, the length of the desired flat cable must be determined in advance, and the interval between the window portions must be determined according to this length. For this reason, in order to create a variety of flat cables having different lengths, it is necessary to prepare insulating films having different window intervals for each type. Therefore, such a method increases the manufacturing cost of the flat cable.

  On the other hand, according to the manufacturing method of the flat cable 1 according to the present embodiment, the insulating film 3a, 3b is removed at the terminal to expose the flat conductor 2, and the cable body 10 is created and connected to the cable body 10. The flat cable 1 is created by pasting the member 21. For this reason, even when producing various types of flat cables 1 having different lengths, the connecting member 21 may be attached to the terminal after the cable body 10 is cut into a desired length. That is, it is not necessary to prepare different insulating films for each type of flat cable. Therefore, according to the manufacturing method of the flat cable 1 according to the present embodiment, a variety of flat cables 1 can be provided at low cost.

  Moreover, according to the manufacturing method of the flat cable 1 which concerns on this embodiment, it contacts the connection base material 22 of the connection conductor 23 by carrying out gold plating to the exposed surface of the flat conductor 61 affixed on the connection base material 22. FIG. Gold plating can be efficiently performed on portions other than the portion. In contrast, when the flat conductor 61 is bonded to the connection base material 22 after the gold plating is applied to the flat conductor 61, the gold plating of the connection conductor 23 in contact with the connection base material 22 is wasted. Or when it is going to carry out gold plating to the connection electrode 12 of the longitudinal direction edge part 11 of the cable main body 10, only the connection electrode 12 cannot be continuously immersed in a plating tank, but it is inefficient. Therefore, according to the manufacturing method of the flat cable 1 which concerns on this embodiment, the flat cable 1 with high reliability of electrical connection can be provided at low cost. If high communication quality is not required for the flat cable 1, tin plating or the like may be applied to the connection conductor 23 instead of gold plating.

  Moreover, according to the manufacturing method of the flat cable 1 which concerns on this embodiment, the highly rigid reinforcement board 24 is affixed on the connection base material 22, and the connection member 21 is created. Thereby, the connection base material 22 and the connection conductor 23 are reinforced by the reinforcing plate 24. For this reason, when the connection member 21 is attached to the cable body 10, the connection member 21 is not easily deformed, and the connection member 21 is easily attached to the cable body 10.

  As described above, the flat cable 1 and the manufacturing method thereof according to the present invention have been described with reference to the embodiments. However, the present invention is not limited to the above-described embodiments, and appropriate modifications and improvements can be made.

  In the above-described embodiment, the example in which the adhesive 16 is applied to the connection member 21 and the connection member 21 and the cable body 10 are bonded together with the adhesive 16 has been described. However, the present invention is not limited to this example. .

  FIG. 18 is a cross-sectional view of a state in which the connecting member 21 is attached to the longitudinal end portion 11 of the cable body 10 from the longitudinal direction according to another embodiment. 18A shows a state before the connection member 21 is attached, and FIG. 18B shows a state after the connection member 21 is attached.

  As shown in FIG. 18, when the connection base material 22 includes a base layer 22b and an adhesive layer 22c made of a thermoplastic adhesive, and the protective film 14 consists of a base layer 14b and an adhesive layer 14c, the adhesive layer 14c The protective film 14 may be attached to the connection member 21 so as to cover the connection electrode 12 by using the adhesive layer 22c.

  First, the conductive paste 15 is applied on the connection conductor 23 of the connection member 21. On the other hand, the protective film 14 is affixed on the opposite side of the surface of the cable body 10 to which the connection member 21 of the connection electrode 12 is bonded. Then, the connection member 21 is attached to the longitudinal end 11 of the cable body 10 so that the connection conductor 23 of the connection member 21 and the connection electrode 12 of the cable body 10 are electrically connected via the conductive paste 15. wear.

  At this time, the connecting member 21 and the longitudinal end portion 11 of the cable body 10 are overlapped and heat-pressed. Then, the adhesive layer 14c of the protective film 14 and the adhesive layer 22c of the connection base material 22 are heated and softened, sink into the adhesive layer 22c, and the softened adhesive layer 14c and the adhesive layer 22c come into contact with each other. When the adhesive layer 14c and the adhesive layer 22c are cured in this state, the connection electrode 12 and the connection conductor 23 are electrically connected by the conductive paste 15, and the protective film 14 and the connection base material 22 are bonded to the adhesive layer 22c. Are pasted together.

  At this time, the connection conductor 23 and the connection electrode 12 are electrically connected by the conductive paste 15 before the adhesive layer 22c contacts the adhesive layer 14c. For this reason, even if the adhesive layer 14 c enters between the connection electrodes 12, it does not enter between the connection electrode 12 and the connection conductor 23. The adhesive layer 22 c also does not enter between the connection electrode 12 and the connection conductor 23. Therefore, the cable body 10 and the connection member 21 can be bonded together while the connection electrode 12 and the connection conductor 23 are reliably conducted.

  Moreover, according to the manufacturing method of such a flat cable 1, since the application | coating process of the adhesive agent 16 can be skipped without using the adhesive agent 16, the flat cable 1 can be provided at low cost.

1: flat cable, 2: conductor, 3a, 3b: insulating film, 10: cable body, 10a: long flat cable, 10b: short flat cable, 12: connection electrode, 14: protective film, 15: conductive paste, 16: Adhesive, 21: Connection member, 22: Connection base material, 23: Connection conductor, 24: Reinforcing plate

Claims (7)

A plurality of conductors arranged on a plane, and an insulating film attached to the conductors from both sides of the conductor arrangement surface, the longitudinal ends of the conductors extending from the longitudinal ends of the insulating film. The cable body,
A connection member affixed to one side of the longitudinal end of the cable body,
The connecting member is
The same number of connection conductors as the conductors;
A connection base material affixed to one surface of the connection conductor;
A reinforcing plate having higher rigidity than the connection substrate,
The conductor and the connection conductor are electrically connected via a conductive paste,
The reinforcing plate is affixed across the insulating film and the surface opposite to the surface where the connection conductor is present in the connection base material,
The flat cable, wherein the conductive paste is stacked on the connection conductor, and an adhesive is stacked on the connection base between the connection conductors arranged in parallel.   The flat cable according to claim 1, further comprising a protective film that covers a surface on the other side of the conductor. Create a long flat cable extending in the longitudinal direction by laminating an insulating film on the conductor from both sides of the conductor arrangement surface to a plurality of conductors arranged on a plane,
Cut the long flat cable into the desired length to create a short flat cable,
At the longitudinal end of the short flat cable, the cable is peeled off to expose the conductor and create the cable body,
A connection base, a reinforcing plate affixed to one surface of the connection base so that a part of the connection base is higher in rigidity than the connection base, and the other of the connection base Creating a connecting member having the same number of connecting conductors as the conductor provided on the side surface;
Affixing the connecting member to the longitudinal end of the cable body so that each exposed conductor and the connecting conductor of the connecting member are electrically connected via a conductive paste,
A part of the reinforcing plate protruding from the connection base material is pasted on the insulating film so that the reinforcing plate straddles the insulating film and the connection base material,
Before affixing the connection member on the longitudinal end of the cable body, a conductive paste is placed on each of the plurality of connection conductors, and an adhesive is formed on the connection base material between the connection conductors arranged in parallel. A method for manufacturing a flat cable, characterized by comprising:   The flat cable manufacturing method according to claim 3, wherein the connection conductor is plated with gold.   The manufacturing method of a flat cable according to claim 3 or 4, wherein a protective film is attached with the adhesive so as to cover a surface on the other surface side of the conductor.   The thermoplastic adhesive which fixes the said connection conductor to the said connection base material is heated, and the said connection base material is bonded together to the said insulating film, It is any one of Claim 3 to 5 characterized by the above-mentioned. Flat cable manufacturing method. A protective film is pasted with the adhesive so as to cover the other surface side of the conductor,
The thermoplastic adhesive that fixes the connection conductor to the connection substrate and the adhesive layer of the protective film are heated, and the protective film is bonded to the connection member so as to cover the conductor. Item 5. The method for producing a flat cable according to Item 3 or 4 .

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