JP2013197041A - Flat wiring material, and mounting body using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat wiring material whose connection operation is easy, and that can realize connection at high reliability when the flat wiring material is mounted on a mounted substrate, and a mounting body using the same.SOLUTION: A flexible flat cable 1 comprises: plural conductors 2 for signals parallely aligned at intervals in a width direction, and having a pair of conductor connection sections 22 at both ends 20; a coating member 3 collectively coating the plural conductors 2 for signals so that both ends 20 are exposed; a conductive reinforcing member 4 provided to extend in a width direction at a position adjacent to both ends 20 of the conductor 2 for signals on the coating member 3; and a stationary member 5 fixing the reinforcing member 4 to the coating member 3. A pair of positioning sections 43 are provided at both ends 40 of the reinforcing member 4, and a pair of reinforcing member connection sections 42 connected to a printed circuit board are provided at positions different from the positioning sections 43. The reinforcing member 4 is split so that a gap between the pair of reinforcing member connection sections 42 is in a non-conduction state.

Description

  The present invention relates to an MFJ (Multi Frame Joiner) including a flexible flat cable, a flat wiring material such as a flexible printed wiring board, and a mounting body using the same.

  Conventionally, wire harnesses are used for wiring components for electrical connection between a plurality of printed wiring boards mounted on an in-vehicle inverter unit, an engine control unit, or the like. In addition, a connection structure using connector parts is employed for electrical connection between the wire harness and the printed wiring board. In recent years, the use of wiring components in place of wire harnesses and the simplification of connection processes have been demanded as one measure for realizing the above-described in-vehicle devices that are smaller, lighter, and lower in cost.

  On the other hand, in-vehicle devices are also required to have high reliability that can withstand long-term use. It is indispensable to ensure reliability for a long-term vibration load and heat load for wiring components mounted on in-vehicle devices and their connection portions.

  In order to cope with the above-described reduction in size, weight, and cost of the in-vehicle device, a mounting structure using a flat wiring material has been devised for wiring components in the in-vehicle device. In addition, for connecting the flat wiring material and the printed wiring board, a structure has been devised in which the conductor connecting portion of the end portion of the flat wiring material is directly connected to the electrode portion of the printed wiring board with solder without using a connector. . In addition, flat wiring materials used as wiring components inside in-vehicle devices include flexible flat cables, MFJ (Multi Frame Joiner) with a structure similar to flexible flat cables, and flexible printed circuit boards (FPC). It has been adopted. Although there are differences in the manufacturing method and constituent materials of the flat wiring material, these have a structure in which a plurality of conductors are arranged in parallel in the width direction to form a flat wiring material. Hereinafter, a flexible flat cable will be described as a representative example of a flat wiring material.

  It is anticipated that resonance will occur in a plurality of printed wiring boards mounted in an in-vehicle device and a flexible flat cable connecting them, due to vibration of the device. Accordingly, the flexible flat cable is greatly deformed, and a mechanical load may be repeatedly applied to the connection portion. When the load is applied repeatedly for a long period of time, the connection portion is damaged, the electrical connection is impaired, and the conductor connection portion and the conductor exposed portion may eventually be destroyed. For the above reasons, it is important for wiring components for in-vehicle devices to ensure reliability especially for mechanical loads such as vibration.

  Regarding the connection structure between the conductor connection part of the flexible flat cable and the electrode part of the printed wiring board, a flexible flat cable positioning structure (for example, see Patent Document 1) and a flat cable pressing structure (for example, see Patent Document 2). Has been proposed.

  The positioning structure of the flexible flat cable described in Patent Document 1 does not easily break the connection even when subjected to external force, and facilitates the connection work. A flexible flat cable in which a plurality of core wires to be connected are exposed at the front end, and a positioning member having a length longer than the width of the flexible flat cable, which is formed of a steel plate having an action as a pressing plate. Prepare. In the structure disclosed as the second embodiment, a stepped portion is provided at both ends, a positioning member in which a hole is formed in the stepped portion, the end of the flexible flat cable is pressed and the hole is fixed to the circuit board with solder. Is. In the structure disclosed as the fourth embodiment, the flexible flat cable is fixed by inserting both ends of a positioning member having stepped portions at both ends into positioning holes formed in the circuit board.

  The flat cable holding structure described in Patent Document 2 always presses the flat cable against the board securely, and can be easily attached and detached, so that it can be reused any number of times. An exposed flat cable, a holding member that is formed of a rigid member, has a holding portion that is bent in the same direction so as to be orthogonal to the cable holding portion and the cable holding portion at both ends, and includes a holding metal fitting provided with a spring in the holding portion. . In the structure disclosed as the second embodiment, the flat cable is pressed to the board side by the cable holding part of the holding metal, and the holding part of the holding metal is inserted into the long hole formed in the board, and the flat cable is removed from the board by the spring. It is fixed so as not to float.

Utility Model Registration No. 3140212 Japanese Utility Model Publication No. 7-22579

  However, in the structure of Patent Document 1, in order to mount the flexible flat cable on the circuit board, the positioning member is first fixed to the circuit board, and then the core wire of the flexible flat cable is connected. A process is required and connection work cannot be easily performed.

  In the structure of Patent Document 2, the presser fitting is a separate member from the flat cable, and two connecting steps of inserting the presser fitting and connecting the lead of the flat cable are required. I can't do it. Moreover, in the structure of patent document 2, since the pressing metal fitting is being fixed to the board | substrate with the spring, it is inadequate as fixation.

  Accordingly, an object of the present invention is to provide a flat wiring material that can be easily connected and ensure high connection reliability when mounting the flat wiring material on a substrate to be mounted, and a mounting body using the same. There is.

  In order to achieve the above object, one aspect of the present invention provides the following flat wiring material and a mounting body using the same.

[1] A plurality of conductors arranged in parallel in the width direction with an interval, an insulating covering member that collectively covers the plurality of conductors so that both ends thereof are exposed, and the covering member A conductive reinforcing member that extends in the width direction at a position close to at least one of the both end portions where the plurality of conductors are exposed, and reinforces the connection of the plurality of conductors to the mounted substrate; A fixing member that fixes the reinforcing member to the covering member, and has a plurality of conductor connecting portions electrically connected to the mounted substrate at at least one end of the plurality of conductors, and the reinforcing member And a pair of reinforcing members connected to the mounting substrate at positions different from the pair of positioning portions. Having a connection, Serial reinforcing member, the flat wiring member between the pair of reinforcing members connecting portion is configured by dividing to be non-conductive.
[2] The flat according to [1], wherein the positioning portion of the reinforcing member is formed by being bent with respect to the reinforcing member connecting portion so as to be inserted into a through hole formed in the mounted substrate. Wiring material.
[3] The flat wiring member according to [1] or [2], wherein the reinforcing member connecting portion of the reinforcing member is located at a position closer to the conductor than the pair of positioning portions.
[4] The reinforcing member is formed of a metal plate, and plated at least on the surface of the reinforcing member connecting portion connected to the mounted substrate. The flat wiring material described.

[5] A plurality of conductors arranged in parallel in the width direction at intervals, an insulating covering member that collectively covers the plurality of conductors so that both ends thereof are exposed, and the covering member A conductive reinforcing member that extends in the width direction at a position close to at least one of the both end portions where the plurality of conductors are exposed, and reinforces the connection of the plurality of conductors to the mounted substrate; A fixing member that fixes the reinforcing member to the covering member, and has a plurality of conductor connecting portions electrically connected to the mounted substrate at at least one end of the plurality of conductors, and the reinforcing member And a pair of reinforcing members connected to the mounting substrate at positions different from the pair of positioning portions. Having a connection, The reinforcing member includes a flat wiring member formed by being divided so that the pair of reinforcing member connecting portions are in a non-conductive state, and an electrode portion electrically connected to the conductor connecting portions of the plurality of conductors And a mounted substrate having an electrode portion that is mechanically connected to the pair of reinforcing member connecting portions.

  According to the present invention, when the flat wiring material is mounted on the substrate to be mounted, the connection work is easy and high connection reliability can be ensured.

FIG. 1 is a plan view showing an appearance of a flexible flat cable according to an embodiment of the present invention. FIG. 2 is a front view showing the appearance of the flexible flat cable according to the embodiment of the present invention. 3 is a cross-sectional view taken along line AA in FIG. 4 is a cross-sectional view taken along line BB in FIG. FIG. 5 is a plan view of an essential part showing Modification 1 of the reinforcing member. FIG. 6 is a cross-sectional view corresponding to FIG. 3, showing a second modification of the reinforcing member. FIG. 7 is a main part plan view showing a state where the flexible flat cable according to the embodiment of the present invention is mounted on a printed wiring board. FIG. 8 is a cross-sectional view taken along the line CC of FIG. 7 showing a state before connection of the reinforcing member connecting portion and the conductor connecting portion. 9 is a cross-sectional view taken along the line CC of FIG. 7 showing a state after the connection of the reinforcing member connecting portion and the conductor connecting portion.

  Hereinafter, embodiments and modifications of the present invention will be described with reference to the drawings. Here, a flexible flat cable will be described as a representative example of a flat wiring material, but the present invention can be applied to other flat wiring materials such as MEJ and flexible printed wiring boards. In addition, in each figure, about the component which has the substantially same function, the same code | symbol is attached | subjected and the duplicate description is abbreviate | omitted.

[Summary of embodiment]
The flat wiring material according to the present embodiment includes a plurality of conductors arranged in parallel in the width direction at intervals, and an insulating coating that collectively covers the plurality of conductors so that both ends thereof are exposed. In the flat wiring member having a member, the plurality of conductors on the covering member are provided extending in the width direction at positions close to at least one of the both end portions where the plurality of conductors are exposed. A conductive reinforcing member that reinforces the connection to the covering member, and a fixing member that fixes the reinforcing member to the covering member, and is electrically connected to the mounted substrate at at least one end of the plurality of conductors. A plurality of conductor connection portions, and a pair of positioning portions for positioning the plurality of conductor connection portions with respect to the mounted substrate at both ends of the reinforcing member, and at positions different from the pair of positioning portions. Wherein a pair of reinforcing members connecting portion connected to the mounting substrate, the reinforcing member, between the pair of reinforcing members connecting portion is constituted by dividing such that the non-conducting state.

  The mounting body according to the present embodiment includes the flat wiring member according to the above-described embodiment, an electrode portion that is electrically connected to the conductor connection portions of the plurality of conductors, the pair of reinforcing member connection portions, and a machine. And a mounted substrate having an electrode portion connected to the substrate.

  “Mounted substrate” refers to a substrate to which one or both terminal portions of the flexible flat cable are electrically connected, and examples thereof include a printed wiring board. Examples of the printed wiring board include a flexible printed wiring board (FPC), a rigid printed wiring board, and a rigid flex printed wiring board that is a composite substrate of an FPC and a rigid printed wiring board. “Fixing” between the reinforcing member and the covering member includes adhesion by an adhesive, welding (fusion) by heating and cooling, ultrasonic welding, and the like. The “close position” is not limited to a position where the reinforcing member is slightly separated from the end where the conductor is exposed (for example, a distance shorter than the width of the reinforcing member), but may be a position where a part of the reinforcing member overlaps.

  A local pressure heating method such as pulse heat makes it possible to simultaneously connect the conductor connection portion and the reinforcing member connection portion to the corresponding electrode portions on the substrate to be mounted.

[Embodiment]
1 and 2 show the appearance of a flexible flat cable according to an embodiment of the present invention. FIG. 1 is a plan view and FIG. 2 is a front view. 3 is a cross-sectional view taken along line AA in FIG. 4 is a cross-sectional view taken along line BB in FIG.

  As shown in FIG. 1, the flexible flat cable 1 has a pair of conductor connection portions 22 at both ends 20 and 20 that are arranged in parallel in the width direction at intervals and are electrically connected to a substrate to be mounted. A plurality of signal conductors 2, an insulating covering member 3 that collectively covers the plurality of signal conductors 2 so that both end portions 20, 20 are exposed, and a plurality of signal conductors 2 on the covering member 3. A conductive reinforcing member 4A that extends in the width direction at positions adjacent to both ends 20 and 20 and reinforces the electrical connection between the conductor connecting portions 22 of the plurality of signal conductors 2 and the mounted substrate. 4B and a fixing member 5 that fixes the reinforcing members 4A and 4B to the covering member 3.

  The reinforcing members 4A and 4B have positioning portions 43 for positioning the pair of conductor connecting portions 22 of the plurality of signal conductors 2 with respect to the mounted substrate at both ends, and the signal conductors 2 than the positioning portions 43. The reinforcing member connecting portion 42 is mechanically connected to the mounted substrate at the side position.

  In the present specification, a portion of the flexible flat cable 1 that is closer to the center than the fixing member 5 is referred to as a “cable body” 1 a, and the reinforcing members 4 A and 4 B, the fixing member 5, and the end portion 20 of the signal conductor 2. The vicinity is referred to as “terminal portion” 1b. The flexible flat cable 1 of this Embodiment has the terminal part 1b mounted in a printed wiring board in both.

(Signal conductor)
The signal conductor 2 has end portions 20 exposed from the covering member 3 at both ends. As shown in FIG. 4, the end portion 20 is bent so that the lower surface 22a of the conductor connecting portion 22 at the tip portion is substantially the same surface as the lower surface 5b of the fixing member 5 (surface opposite to the upper surface 5a). It is bent by the portions 21a and 21b to form an S-shape (gull wing shape). The lower surface 22a of the conductor connection portion 22 is connected to a corresponding electrode portion formed on the printed wiring board by solder. The bending angle of the bent portions 21a and 21b is preferably 90 degrees or less. By setting this angle, the surface tension acts so that the solder reduces the surface area of the solder itself, and the solder wetting is not only on the lower surface 22a of the conductor connecting portion 22 but also on the fixing member 5 side from the bent portion 21b. Can also be generated. Thus, the connection strength can be improved by increasing the amount of solder wetting.

For the signal conductor 2, copper or a copper alloy such as oxygen-free copper or tough pitch copper can be used.
The surface of copper or a copper alloy may be plated, or a metal such as tin (Sn), nickel (Ni), or gold (Au) may be used alone or in a state in which a plurality of materials are laminated.

(Coating member)
For the covering member 3, an insulating resin such as a film-like polyimide resin or polyethylene terephthalate (PET) resin can be used.

(Reinforcing member)
As shown in FIG. 2, the reinforcing members 4 </ b> A and 4 </ b> B are such that the lower surface 42 a of the reinforcing member connecting portion 42 that is an intermediate portion of the end portion 40 exposed from the fixing member 5 is the lower surface of the conductor connecting portion 22 of the signal conductor 2. It is bent by the bent portions 41a and 41b so as to be substantially the same surface as 22a to form an S-shape (gull wing shape), and the positioning portion 43 at the tip is 90 so as to be orthogonal to the surface of the printed wiring board. The bent portion 41c is bent at a degree. The reinforcing member connecting portions 42 of the reinforcing members 4A and 4B are connected to corresponding electrode portions formed on the printed wiring board by solder. The bending angle of the bent portions 41a and 41b is preferably 90 degrees or less. By setting the angle, the surface tension acts to reduce the surface area of the solder itself, and the solder wetting is caused not only by the lower surface 42a of the reinforcing member connecting portion 42 but also by the bent portion 41b. Can also be produced on the side. Thus, the connection strength can be improved by increasing the amount of solder wetting.

  The reinforcing members 4A and 4B are preferably made of a material having a higher strength (high tensile strength) than the signal conductor 2, for example, a copper alloy such as phosphor bronze or an iron (Fe) -nickel (Ni) alloy. be able to. Note that the end 40 which is the exposed portion of the reinforcing members 4A and 4B may be plated with the same material as the end 20 of the signal conductor 2. The reinforcing members 4A and 4B are preferably thicker than the metal material used for the signal conductor 2. By using a high-strength material and increasing the plate thickness, a higher reinforcing effect can be obtained in the vicinity of the conductor connecting portion 22 of the signal conductor 2 against the vibration load. Further, the reinforcing members 4A and 4B are made of the above-described metal material, and the thickness thereof is made thicker than that of the signal conductor 2, so that out-of-plane deformation in the thickness direction when inserted into the through hole of the printed wiring board. Can be suppressed.

  In FIG. 1, the fixing member 5 is partially removed to show the shape of the pair of reinforcing members 4A and 4B. The reinforcing members 4 </ b> A and 4 </ b> B have a wide portion 45 wider than the end portion 40. This also provides the effect of reinforcing the vicinity of the conductor connecting portion 22 of the signal conductor 2.

  As shown in FIG. 3, the pair of reinforcing members 4 </ b> A and 4 </ b> B is in a non-conducting state, that is, not in contact with each other by interposing an insulating adhesive 51 described later between them. The reinforcing members 4A and 4B only need to be divided so that the pair of reinforcing member connecting portions 42 are in a non-conductive state. The reinforcing members 4A and 4B are made of insulating rubber, plastic, or the like. It may be connected.

  Note that the positioning portions 43 of the reinforcing members 4A and 4B may be located at portions other than the tip portions of the reinforcing members 4A and 4B, or may be bent in a substantially U shape in the middle of the end portion 40 or different members. May be joined to the reinforcing members 4A and 4B by welding or the like to form the positioning portion 43. In this case, the reinforcing member connecting portion 42 can be provided on the distal end side of the positioning portion 43. However, by providing the reinforcing member connecting portion 42 on the signal conductor 2 side of the positioning portion 43, as described above, the solder wets up. Since the amount can be increased, the connection strength can be improved.

(Layer structure of flexible flat cable)
The layer configuration of the flexible flat cable 1 will be described with reference to FIG. The covering member 3 has a surface insulating film 30 bonded to the signal conductor 2 with an adhesive 31. For the adhesive 31 that adheres the signal conductor 2 and the insulating film 30, for example, a thermosetting resin such as an epoxy resin or an acrylic resin can be used.

  The fixing member 5 includes reinforcing members 4A and 4B disposed on the one surface 3a side of the covering member 3, a reinforcing metal plate 52 disposed on the other surface 3b side of the covering member 3, and an insulating film 50 covering these The reinforcing members 4 </ b> A and 4 </ b> B and the reinforcing metal plate 52 are fixed to the covering member 3 with the adhesive 51, thereby acting as a reinforcing member that suppresses deformation in the vicinity of the conductor connecting portion 22 of the signal conductor 2.

  The reinforcing metal plate 52 is preferably made of a material having higher strength (high tensile strength) than that of the signal conductor 2 as in the case of the reinforcing members 4A and 4B. For example, phosphor bronze or iron (Fe) -nickel (Ni) alloy Etc. are used. The reinforcing metal plate 52 may be made of the same material as the reinforcing members 4A and 4B or may be made of a different material as long as it satisfies the above conditions. The reinforcing metal plate 52 is preferably thicker than the metal material used for the signal conductor 2. By using a high-strength material and increasing the plate thickness in combination with the reinforcing members 4A and 4B, a higher reinforcing effect in the vicinity of the conductor connecting portion 22 of the signal conductor 2 with respect to the vibration load can be obtained.

  The adhesive 51 that bonds the reinforcing members 4A and 4B, the reinforcing metal plate 52, and the insulating film 50 to the covering member 3 for the signal conductor 2 is the same as the adhesive 31 that bonds the insulating film 30 to the signal conductor 2. Materials may be used.

(Modification 1)
FIG. 5 is a plan view of a principal part showing a first modification of the reinforcing members 4A, 4B. As shown in FIG. 1, the pair of reinforcing members 4 </ b> A and 4 </ b> B may not be divided and formed in a straight line that is substantially perpendicular to the longitudinal direction of the reinforcing members 4 </ b> A and 4 </ b> B. For example, as shown in FIG. 5, the deformation suppressing effect in the vicinity of the conductor connecting portion 22 is also increased by forming the portion to be divided into an L-shape composed of the wide portion 45 and the narrow portion 46.

(Modification 2)
FIG. 6 is a cross-sectional view corresponding to FIG. 3, showing a second modification of the reinforcing members 4A, 4B. Each of the pair of reinforcing members 4A and 4B has an end portion 40 having the same shape as that shown in FIG. 3, and the other end on the wide portion 45 of one reinforcing member 4A is covered with the insulating film 50. The wide portions 45 of the reinforcing members 4B overlap so as not to contact each other. This also increases the deformation suppressing effect in the vicinity of the conductor connecting portion 22. Further, the reinforcing members 4A and 4B do not need to be covered with a single insulating film 50, and in any case, physical or electrical means such as interposing an adhesive between the pair of reinforcing members 4A and 4B. If it is not in contact,

(Mounting method of flexible flat cable to printed wiring board)
Next, an example of a method for mounting the flexible flat cable 1 on the printed wiring board will be described. FIG. 7 is a main part plan view showing a state where the flexible flat cable 1 is mounted on a printed wiring board. FIG. 8 is a cross-sectional view taken along the line CC of FIG. 7 showing a state before connection of the reinforcing member connecting portion and the conductor connecting portion. 9 is a cross-sectional view taken along the line CC of FIG. 7 showing a state after the connection of the reinforcing member connecting portion and the conductor connecting portion.

  As shown in FIGS. 7, 8, and 9, the printed wiring board 10 is formed on the surface of the insulating base 11 and the surface of the insulating base 11, and the conductor connection portion 22 of the signal conductor 2 is solder-connected. The electrode member 12B to which the reinforcing member connecting portions 42 of the portion 12A and the reinforcing members 4A and 4B are solder-connected, the solder resist 13 formed in a region other than the electrode portions 12A and 12B of the surface 11a of the insulating base 11, and And a through hole 15 penetrating the insulating substrate 11. In FIGS. 8 and 9, 11 b is the back surface 11 b of the insulating base material 11.

  The through hole 15 is in a state in which the printed wiring board 10 has been drilled with a drill or a laser. The through-hole 15 may form an electrode part made of nickel (Ni), gold (Au), or the like on the inner surface of the through-hole 15 by plating after drilling.

  First, the solder supplies paste solder containing a flux and a solvent on the electrode parts 12A and 12B of the printed wiring board 10 to apply the solders 14A and 14B on the electrode parts 12A and 12B. The solder may be solidified by applying paste solder on the electrode portions 12A and 12B, followed by heating and melting and solidifying.

  Next, the positioning portions 43 of the reinforcing members 4 </ b> A and 4 </ b> B of the one end portion 1 b of the flexible flat cable 1 are inserted into the through holes 15 of the printed wiring board 10. As a result, the conductor connecting portion 22 of the signal conductor 2 is aligned with the electrode portion 12A of the printed wiring board 10, and at the same time, the reinforcing member connecting portion 42 of the reinforcing members 4A and 4B is also electrode portion 12B of the printed wiring board 10. The conductor connecting portion 22 is disposed on the solder 14A, and the reinforcing member connecting portion 42 is disposed on the solder 14B.

  Next, the conductor connection portion 22 and the reinforcing member connection portion 42 are collectively pressurized with the pulse heat heating tool 100 indicated by the broken line in FIG. The heating tool 100 has a connection surface capable of collectively pressing the conductor connection portion 22 and the reinforcing member connection portion 42, and is formed of, for example, molybdenum, tungsten, or the like.

  Next, an electric current is passed through the heating tool 100, and the conductor connection portion 22 and the reinforcing member connection portion 42 are instantaneously and locally heated by resistance heating of the heating tool 100, thereby melting the solders 14A and 14B. As shown in FIG. 4, the conductor connecting portion 22 and the reinforcing member connecting portion 42 are connected and fixed to the electrode portions 12A and 12B of the printed wiring board 10. Since the lower surface 22a of the conductor connection portion 22 and the lower surface 42a of the reinforcing member connection portion 42 are formed to be on the same plane, either one is separated from the electrode portions 12A and 12B of the printed wiring board 10 and is not connected. There is no.

(Effect of this embodiment)
According to the present embodiment, the following effects can be obtained.
(A) Since the pulse heat method is a method of heating by energizing, when the reinforcing member is formed of a single metal plate, the current is also applied to the inside of the reinforcing member, the metal plate itself generates heat, and the reinforcing member There is a possibility that the tin (Sn) plating applied to the metal melts or the adhesive around the reinforcing member is exposed to a high temperature, and the adhesiveness to the flexible flat cable 1 is lowered. On the other hand, since the reinforcing members 4A and 4B of the present embodiment are not in contact with each other, it is possible to suppress energization heat generation inside the reinforcing members 4A and 4B even by connection of the pulse heat method. Stable adhesion to the flexible flat cable 1 can be maintained.
(A) Since the conductor connecting portion 22 and the reinforcing member connecting portion 42 are collectively pressed by the pulse heating type heating tool 100, it is possible to prevent defects such as the conductor connecting portion 22 and the reinforcing member connecting portion 42 from floating. .
(C) Even in the flexible flat cable 1 including the reinforcing members 4A and 4B for positioning, the signal conductor 2 and the reinforcing member 4 are connected to the corresponding electrode portions 12A and 12B of the printed wiring board 10 without increasing the number of connection steps. Can be connected and fixed.
(D) Since the signal conductor 2 and the reinforcing members 4A and 4B are firmly fixed to the electrode portions 12A and 12B of the printed wiring board 10 by solder, the vibration deformation of the flexible flat cable itself when a mechanical load is applied. It is possible to suppress the occurrence of damage at the conductor connection portion 22 due to the above.
(E) Depending on the printed wiring board 10 on which the flexible flat cable 1 is mounted or the in-vehicle device unit housing structure on which the printed wiring board 10 is mounted, only the local heating method may be supported. The present embodiment can also be applied to such a case.

  In addition, this invention is not limited to the said embodiment and the said modification, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, you may divide | segment a reinforcement member into a pair of member which has a reinforcement member connection part, and the 1 or 2 or more member which does not have a reinforcement member connection part.

  Moreover, it is also possible to remove some of the constituent elements of the above-described embodiment within a range not changing the gist of the present invention. For example, the reinforcing metal plate 52 can be omitted by increasing the rigidity of the reinforcing members 4A and 4B. In addition, the mounting method described above may perform deletion, addition, change, replacement, etc. of steps within a range that does not change the gist of the present invention. For example, in the above embodiment, the solder connection portions 22 and the reinforcing member connection portions 42 are connected by applying the solders 14A and 14B on the electrode portions 12A and 12B of the printed wiring board 10, but the conductor connection portions 22 and the reinforcing members are connected. A solder material may be formed on the lower surfaces 22a and 42a of the connecting portion 42 facing the printed wiring board 10. In this case, it is preferable to remove the flux residue adhering to the surface of the solder material by washing or the like.

  The present invention is applicable to, for example, an in-vehicle device, a mobile phone, a communication device, an information terminal device, a measuring device, a home appliance, and the like.

DESCRIPTION OF SYMBOLS 1 ... Flexible flat cable (flat wiring material), 1a ... Cable main body, 1b ... Terminal part, 2 ... Signal conductor (conductor), 3 ... Cover member, 3a ... One side, 3b ... The other side, 4A, 4B ... reinforcing member, 5 ... fixing member, 5a ... upper surface, 5b ... lower surface, 10 ... printed wiring board (substrate to be mounted), 11 ... insulating substrate, 11a ... front surface, 11b ... back surface, 12A, 12B ... electrode portion, 13 ... Solder resist, 14A, 14B ... Solder, 15 ... Through hole, 20 ... End, 21a, 21b ... Bent part, 22 ... Conductor connection, 22a ... Lower surface of conductor connection, 30 ... Insulating film, 31 ... Adhesion Agent, 40 ... End, 41a, 41b, 41c ... Bent part, 42 ... Reinforcing member connecting part, 42a ... Lower surface of reinforcing member connecting part, 43 ... Positioning part, 45 ... Wide part, 46 ... Narrow part, 50 ... Insulating film, 51 ... Adhesion , 52 ... reinforcing metal plate, 100 ... heating tool

Claims (5)

A plurality of conductors arranged in parallel in the width direction at intervals;
An insulating covering member that collectively covers the plurality of conductors so that both ends thereof are exposed; and
The conductive member is provided to extend in the width direction at a position adjacent to at least one of the both end portions where the plurality of conductors on the covering member are exposed, and reinforces the connection of the plurality of conductors to the mounting substrate. A reinforcing member;
A fixing member for fixing the reinforcing member to the covering member;
A plurality of conductor connection portions electrically connected to the mounted substrate at at least one end of the plurality of conductors;
A pair of positioning parts for positioning the plurality of conductor connection parts with respect to the mounting board at both ends of the reinforcing member, and a pair connected to the mounting board at positions different from the pair of positioning parts A reinforcing member connecting portion,
The reinforcing member is a flat wiring member configured by being divided so that the pair of reinforcing member connecting portions are in a non-conductive state.   The flat wiring member according to claim 1, wherein the positioning portion of the reinforcing member is formed by being bent with respect to the reinforcing member connecting portion so as to be inserted into a through hole formed in the mounted substrate.   The flat wiring member according to claim 1, wherein the reinforcing member connecting portion of the reinforcing member is located at a position closer to the conductor than the pair of positioning portions.   4. The flat wiring according to claim 1, wherein the reinforcing member is formed of a metal plate, and is plated on at least a surface of the reinforcing member connecting portion that is connected to the mounting substrate. 5. Wood. A plurality of conductors arranged in parallel in the width direction with an interval; an insulating covering member that collectively covers the plurality of conductors so that both ends thereof are exposed; and the plurality of conductors on the covering member A conductive reinforcing member that extends in the width direction at a position close to at least one of the both end portions where the conductor of the plurality of conductors is exposed, and reinforces the connection of the plurality of conductors to the mounting substrate; and the reinforcing member A plurality of conductor connecting portions that are electrically connected to the mounted substrate at at least one end of the plurality of conductors, and both ends of the reinforcing member A pair of positioning portions for positioning the plurality of conductor connection portions with respect to the mounted substrate, and a pair of reinforcing member connecting portions connected to the mounted substrate at positions different from the pair of positioning portions. Have Member has a flat wiring member between the pair of reinforcing members connecting portion is constituted by dividing such that the non-conducting state,
The mounting body provided with the to-be-mounted board | substrate which has an electrode part electrically connected with the said conductor connection part of a said some conductor, and an electrode part mechanically connected with a pair of said reinforcing member connection part.

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