JP2013197040A - Flat wiring material, and mounting body using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat wiring material that can realize solder connection at high stability and reliability by high alignment accuracy of an exposure section of a conductor and an electrode section of a mounted substrate, even when the exposure section of the conductor of the flat wiring material of an MFJ, a flexible printed circuit board and the like such as a flexible flat cable is directly connected by solder to the electrode section of the mounted substrate on which solder is precoated, and a mounting body using the same.SOLUTION: A flexible flat cable 1 comprises: plural conductors 2 for signals parallely arranged at intervals in a width direction; an insulative coating member 3 coating each conductor 2 for signals; engagement members 4 provided at adjacent positions at both ends at which the conductors 2 for signals on the coating member 3 are exposed, and engaged by inserting insertion sections 43 formed at ends in through holes formed on the mounted substrate; and positioning members 6 parallely arranged on the conductors 2 for signals, and positioning the conductors 2 for signals by inserting the insertion sections 61 formed at tips in holes formed on the mounted substrate.

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 a wiring component that connects a plurality of printed wiring boards mounted inside a device, resonance vibration may occur in the wiring component in accordance with a vibration load that acts on the in-vehicle device. Due to this resonance vibration, a relatively large mechanical load may act on the connection part of the wiring component. Due to this mechanical load, there is a possibility that the electrical connection of the connection part of the wiring component is impaired, or the conductor part constituting the wiring part and its connection part are destroyed. For these reasons, in wiring components for in-vehicle devices, it is particularly important to ensure reliability with respect to mechanical loads that act due to vibration or the like.

  In order to cope with the above-mentioned reduction in size, weight and cost of in-vehicle devices, a plurality of conductors (mainly copper such as oxygen-free copper and tough pitch copper) arranged in parallel in the width direction on the wiring components in the in-vehicle devices. The board-to-board connection adopts a wiring component called a flexible flat cable that is integrated by covering the insulation film for coating with adhesives from both sides in the conductor thickness direction. The structure has been put into practical use. In this flexible flat cable, conductor exposed portions where the conductor is exposed from the insulating film are formed at both ends in the conductor longitudinal direction, and electrical connection with the printed wiring board is performed at the conductor exposed portions.

  For flat wiring materials such as flexible flat cables used as wiring components in in-vehicle devices, MFJ (Multi Frame Joiner) with a structure similar to flexible flat cables and flexible printed circuit boards (Flexible Print Circuit: FPC) ) Etc. are also 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.

  A pressure contact type connector may be used for electrical connection between the flexible flat cable and the printed wiring board. The conductor exposed portion of the terminal portion of the flexible flat cable is inserted into the opening of the connector, and the conductor exposed portion of the flexible flat cable and the electrode of the connector are brought into pressure contact for electrical conduction. In connection by a connector, the flexible flat cable is mechanically fixed by inserting the flexible flat cable into the opening of the connector.

  The connection of the flexible flat cable via the connector has an advantage that the flexible flat cable can be easily inserted and removed. However, in an in-vehicle device that is required to be reduced in size and weight, a space for installing a connector on a printed wiring board may not be designed.

  In addition, in connection with a pressure contact type connector, a connection failure called a momentary disconnection in which contact between the exposed conductor of the flexible flat cable and the electrode of the connector is temporarily interrupted by a vibration load may occur. There is a problem.

  For the electrical connection between the conductor exposed part of the flexible flat cable and the electrode part provided on the printed wiring board, a structure that directly connects with a bonding material such as solder material or conductive adhesive is adopted without using a connector. Sometimes. Direct connection of the exposed conductor portion with a solder material or the like can cope with downsizing by reducing the connection portion area and reduce the number of parts of the connection component. Furthermore, it is possible to obtain effects such as a reduction in the mounting process and a simplification of the process by solder connection and batch connection with electronic components other than the wiring components mounted on the printed wiring board. In addition, bonding using a bonding material such as a resin filled with solder material or conductive metal particles is usually a metal bonding that forms an intermetallic compound, so electrical contacts such as pressure contact type connectors may be momentarily interrupted. There is no need to do so, and an electrically stable junction can be obtained.

  In order to cope with the downsizing of the above-mentioned in-vehicle devices, the wiring components themselves are also required to be miniaturized and mounted with high density, and in the flexible flat cable, the distance between the exposed conductors connected to the electrode part of the printed wiring board (Pitch) is miniaturized. When the interval between the conductor exposed portions becomes fine, it is required to more accurately perform alignment at the time of connection between the conductor exposed portion and the corresponding electrode portion of the printed wiring board. When the alignment accuracy is insufficient, the exposed conductor connected to the conductor in the width direction of the conductor is connected to the other adjacent electrode by the solder material, and an electrical failure (short circuit) is caused. May occur. For this reason, when the conductor exposed part of the flexible flat cable is directly connected to the electrode part of the printed wiring board with a solder material, means for accurate alignment between the conductor exposed part and the corresponding printed wiring board electrode part is required. It is necessary to take.

  As a method of such alignment, for example, a method of matching a double-sided tape affixed to a substrate and a mark provided on a flexible flat cable (see, for example, Patent Document 1), a flexible flat cable on a land provided on a substrate A method of abutting the side ends of the flexible printed wiring board (see, for example, Patent Document 2), and a method of fitting an extension formed in the flexible printed wiring board into a hole formed in the rigid printed wiring board (see, for example, Patent Document 3). ) Etc. are known.

  The alignment method described in Patent Document 3 includes a film made of an insulating material, a plurality of wiring patterns formed on the film, a coating that covers the plurality of wiring patterns so that ends of the wiring patterns are exposed, and A flexible printed wiring board having two extending portions formed by projecting a part of a film made of an insulating material, a wiring pattern connected to an end face of the wiring pattern of the flexible printed wiring board, and two extending portions The wiring pattern of the flexible printed wiring board is obtained by elastically deforming and inserting the extended portion of the flexible printed wiring board into the hole of the rigid printed wiring board using the rigid printed wiring board having two holes into which the cable is inserted. Is aligned with the wiring pattern of the rigid printed wiring board. Further, since the width of the extending portion is substantially equal to the inner diameter of the hole, the extending portion is just fitted into the hole.

JP 2008-270304 A JP 2007-201008 A JP 2000-165035 A

  However, in the positioning method described in Patent Document 1, when the double-sided tape on the surface of the substrate and the mark of the flexible flat cable are inadequate, or when the conductor of the flexible flat cable is exposed due to a mistake in affixing operation There is a possibility that a position shift occurs between the electrode portion and the electrode portion of the substrate. Moreover, the adhesive force of a double-sided tape may fall by being exposed to the high temperature environment in a reflow furnace.

  In the alignment method described in Patent Document 2, the position of the flexible flat cable is displaced with respect to the substrate due to handling during handling and hot air or vibration in the reflow furnace, and the reliability of the connection between the exposed portions of the wiring pattern May be impaired.

  In the alignment method described in Patent Document 3, since the extending portion is elastically deformed and inserted into the hole, the position of the flexible flat cable in the longitudinal direction (that is, the longitudinal direction of the conductor) varies depending on the amount of insertion, In some cases, the alignment between the conductor exposed portion of the flexible flat cable and the electrode portion of the rigid printed wiring board is not sufficient.

  Accordingly, an object of the present invention is to directly connect an exposed portion of a conductor of a flat wiring material such as an MFJ, a flexible printed wiring board, etc., including a flexible flat cable, to the electrode portion of the mounting substrate on which the solder is precoated. However, an object of the present invention is to provide a flat wiring material capable of stable and highly reliable solder connection with a high alignment accuracy between the exposed portion of the conductor and the electrode portion of the mounted substrate, and a mounting body using the same.

  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 An insertion portion formed at an end extending in the width direction is inserted into a through-hole formed in the mounted substrate. An engaging member, a fixing member that fixes the engaging member to the covering member, and a hole that is arranged in parallel with the plurality of conductors and that has an insertion portion formed at a tip portion formed in the mounting substrate. And a positioning member for positioning the plurality of conductors inserted into the flat wiring member.
[2] The flat wiring member according to [1], wherein the engaging member is disposed such that a direction orthogonal to a longitudinal direction of the conductor is a longitudinal direction of the engaging member.
[3] The engaging member and the positioning member are formed of a metal plate, and the engaging member and the positioning member are formed such that the width directions of the respective insertion portions intersect each other. The flat wiring material according to [1] or [2].
[4] 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 of the conductors are exposed, and on the covering member An insertion portion formed at an end extending in the width direction is inserted into a through-hole formed in the mounted substrate. A flat wiring member that includes an engaging member that engages and a fixing member that fixes the engaging member to the covering member, and the insertion portion of the engaging member is inclined at a predetermined angle with respect to the width direction.
[5] The insertion portion of the engagement member is an opening that is elastically deformable when inserted into the through hole, and prevents the insertion member from slipping in the direction opposite to the insertion direction after being inserted into the through hole. The flat wiring material according to any one of [1] to [4], wherein the flat wiring member has a protruding portion.

[6] 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 An insertion portion formed at an end extending in the width direction is inserted into a through-hole formed in the mounted substrate. An engaging member, a fixing member that fixes the engaging member to the covering member, and a hole that is arranged in parallel with the plurality of conductors and that has an insertion portion formed at a tip portion formed in the mounting substrate. A flat wiring member provided with a positioning member for positioning the plurality of conductors inserted into the through hole, the through hole into which the insertion portion of the engaging member of the flat wiring member is inserted, and the insertion of the positioning member Said hole into which the part is inserted Mounting body and a target mounting substrate having a plurality of conductors and solder connected thereto electrode portion.
[7] The mounted substrate has a first electrode portion solder-connected to the plurality of conductors and a second solder-connected to the engaging member on a surface on which the flat wiring member is mounted. An electrode portion; and the plurality of conductors of the flat wiring member include a first connection portion that is solder-connected to the first electrode portion of the mounted substrate, and the engagement member includes the mounted substrate A second connection portion solder-connected to the second electrode portion, and the insertion portion of the engaging member and the insertion portion of the positioning member are connected to the first and second electrode portions, The mounting body according to [6], wherein the mounting body has a shape that allows displacement in the insertion direction of the flat wiring member when the first and second connection portions are connected by soldering.
[8] The engagement member of the flat wiring member is a pair of engagement members provided at positions close to the both ends where the plurality of conductors on the covering member are exposed, and the flat wiring The insertion portion of the positioning member of the material is a pair of insertion portions formed at each of the two end portions, and the mounted substrate is provided at both end portions where the plurality of conductors of the flat wiring material are exposed. First and second mounted parts that are solder-connected to each other, the insertion portions of the pair of engaging members are inserted into the through holes, respectively, and the pair of insertion portions of the positioning member are inserted into the holes, respectively. The mounting body according to [6] or [7], which is a substrate.
[9] 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 An insertion portion formed at an end extending in the width direction is inserted into a through-hole formed in the mounted substrate. A flat wiring member that includes an engaging member that engages and a fixing member that fixes the engaging member to the covering member, wherein the insertion portion of the engaging member is inclined at a predetermined angle with respect to the width direction; A mounting body comprising: the mounting hole having the through hole into which the insertion portion of the engaging member of the flat wiring member is inserted; and an electrode portion to be soldered to the plurality of conductors.

  According to the present invention, even when an exposed portion of a conductor of a flat wiring material such as a MFJ including a flexible flat cable and a flexible printed wiring board is directly connected to an electrode portion of a substrate to be mounted pre-coated with solder, The high alignment accuracy between the exposed portion of the conductor and the electrode portion of the mounted substrate enables stable and highly reliable solder connection.

1A and 1B show the appearance of a flexible flat cable according to an embodiment of the present invention, where FIG. 1A is a plan view and FIG. 1B is a front view. FIG. 2 is a plan view showing a state where the engaging member of the flexible flat cable shown in FIG. FIG. 3 is a diagram illustrating exposed portions of the signal conductor, the engaging member, and the positioning member. FIG. 4 is a cross-sectional view taken along the line AA of FIG. 1A showing the layer configuration of the flexible flat cable. FIG. 5 is a plan view of the engaging member with the covering member partially removed to show the shape of the engaging member. FIG. 6 is a main part plan view showing a state in which a terminal portion of the flexible flat cable is mounted on a printed wiring board. FIG. 7 is a plan view of a principal part showing a state in which the engaging member and the positioning member shown in FIG. 6 are inserted into the through holes. FIGS. 8A and 8B are diagrams for explaining alignment by the insertion portion of the engaging member, where FIG. 8A is a diagram illustrating a relationship between the insertion portion and the through hole, and FIG. 8B is a size of the through hole and the engaging member. It is a figure which shows the relationship between and a movable amount. FIG. 9A is a cross-sectional view taken along line B-B in FIG. 6 showing a terminal portion of the flexible flat cable according to the embodiment of the present invention. 9B is a cross-sectional view taken along line B-B in FIG. 6, showing a terminal portion of the flexible flat cable according to the embodiment of the present invention. 9C is a cross-sectional view taken along line B-B in FIG. 6, showing a terminal portion of the flexible flat cable according to the embodiment of the present invention. FIG. 9D is a cross-sectional view taken along line B-B in FIG. 6 showing a terminal portion of the flexible flat cable according to the embodiment of the present invention. FIG. 9E is a cross-sectional view taken along the line CC of FIG. 6 showing a terminal portion of the flexible flat cable according to the embodiment of the present invention. FIG. 9F is a cross-sectional view taken along the line CC of FIG. 6 showing a terminal portion of the flexible flat cable according to the embodiment of the present invention. FIG. 10 is a cross-sectional view taken along the line BB of FIG. 6 showing a joining method of the engaging member and the positioning member as the first modification of the present embodiment. FIG. 11 is a diagram for explaining a case where two printed wiring boards are connected by the flexible flat cable shown in FIG. 1 as a second modification of the present embodiment. FIG. 12 is a main part plan view showing a positioning member of the flexible flat cable according to the third modification of the present embodiment. FIG. 13 is a main part plan view showing a positioning member of the flexible flat cable according to the fourth modification of the present embodiment. FIG. 14 is a plan view showing a state where the engaging member of the flexible flat cable according to the fifth modification of the present embodiment is developed. FIG. 15 is a principal plan view showing a state in which the engaging member shown in FIG. 14 is bent and inserted into the through hole of the printed wiring board.

  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 provided with the member, the insertion portion is provided at a position close to at least one of the both end portions where the plurality of conductors on the covering member are exposed, and is formed at the end portion extending in the width direction. Is disposed in parallel with the plurality of conductors, and is formed at the distal end portion. The engaging member is inserted into and engaged with the through hole formed in the mounting substrate, the fixing member that fixes the engaging member to the covering member, and the plurality of conductors. And a positioning member that positions the plurality of conductors by being inserted into a hole formed in the mounted substrate.

  Further, the mounting body of the present embodiment includes the flat wiring member of the above embodiment, the through hole into which the insertion portion of the engaging member of the flat wiring member is inserted, and the insertion of the positioning member. A mounting substrate having a hole into which the portion is inserted and an electrode portion that is solder-connected to the plurality of conductors.

  Further, the flat wiring material of the present embodiment has a plurality of conductors arranged in parallel in the width direction at intervals, and an insulating property that covers the plurality of conductors in a lump so that both ends thereof are exposed. In the flat wiring member provided with the covering member, the plurality of conductors on the covering member are provided at positions close to at least one of the both end portions where the plurality of conductors are exposed, and are formed at the end portions extending in the width direction. An engaging member that is inserted into and engaged with a through hole formed in the mounted substrate; and a fixing member that fixes the engaging member to the covering member. It is inclined at a predetermined angle with respect to the width direction.

  Further, the mounting body according to the present embodiment includes the flat wiring material according to the above-described embodiment, the through hole into which the insertion portion of the engaging member of the flat wiring material is inserted, and the plurality of conductors and the solder connection. And a mounted substrate having an electrode portion to be mounted.

  “Mounted substrate” refers to a substrate to which one or both terminal portions of the flexible flat cable are electrically connected, such as a printed wiring board. The “fixing” between the engaging 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 engaging member is slightly separated from the end where the conductor is exposed (for example, a distance shorter than the width of the engaging member), but may also be a position where a part of the engaging member overlaps. The “hole” formed in the substrate to be mounted may be a hole that penetrates the substrate to be mounted or a hole that does not penetrate.

  By fixing the engaging member to the covering member that covers the plurality of conductors by the fixing member, the position of the engaging member with respect to the exposed portion of the plurality of conductors can be determined, and the engaging member can be used for positioning with respect to the mounted substrate. It becomes. By using the engaging member and the positioning member, the accuracy of alignment in two different directions, for example, two directions orthogonal to each other, between the exposed portion of the conductor and the electrode portion of the mounted substrate is improved.

[Embodiment]
1A and 1B show the appearance of a flexible flat cable according to an embodiment of the present invention, where FIG. 1A is a plan view and FIG. 1B is a front view. FIG. 2 is a plan view showing a state where the engaging member of the flexible flat cable shown in FIG. FIG. 3 is a view showing an exposed portion of the signal conductor and an exposed portion of the engaging member.

  As shown in FIG. 1, the flexible flat cable 1 includes a plurality of signal conductors 2 and a plurality of signal conductors 2 arranged in parallel in the width direction at intervals so that both ends are exposed. A cable main body 1a having an insulating covering member 3 for covering and a plurality of signal conductors 2 are arranged so as to cross the width direction, and the cable main body 1a is temporarily fixed to, for example, a printed wiring board as a substrate to be mounted. Engaging member 4, a fixing member 5 that fixes the engaging member 4 to both end portions (positions close to the exposed portion 20 of the signal conductor 2) of the covering member 3, and both end portions together with the plurality of signal conductors 2 And a positioning member 6 for positioning the signal conductors 2 together. The engaging member 4 and the fixing member 5 can be provided at one end or both ends of the cable body 1a according to the connection form of the cable body 1a.

  In this specification, the vicinity of the fixing member 5 and the exposed portion 20 of the signal conductor 2 is referred to as a “terminal portion” 1b of the cable body 1a. 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 exposed portions 20 exposed from the covering member 3 at both ends. As shown in FIG. 3, the exposed portion 20 has a lower surface 22 a of the solder connection portion (first connection portion) 22 at the tip end portion that is substantially the same as the lower surface 5 b (surface opposite to the upper surface 5 a) of the fixing member 5. As shown, the bent portions 21a and 21b are bent to form an S-shape (gull wing shape). The lower surface 22a of the solder 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 action of surface tension that causes the solder to reduce the surface area of the solder itself works, and the solder wetting rises not only on the lower surface 22a of the solder connection 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.

(Engagement member)
As shown in FIG. 1B, the engaging member 4 has a lower surface 42a of a solder connection portion (second connection portion) 42 that is an intermediate portion of the exposed portion 40 exposed from the fixing member 5 as a signal conductor. 2 is bent by the bent portions 41a and 41b so as to be substantially the same surface as the lower surface 22a of the solder connection portion 22, and an insertion portion 43 at the tip is formed on the printed wiring board. A bent portion 41c that is bent at 90 degrees so as to be orthogonal to the surface. The solder connection portion 42 of the engaging member 4 is connected to the corresponding electrode portion 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 this angle, the action of surface tension that causes the solder to reduce the surface area of the solder itself works, and the solder wetting rises not only on the lower surface 42a of the solder connection portion 42 but also on the fixing member 5 side from the bent portion 41b. Can also be generated. Thus, the connection strength can be improved by increasing the amount of solder wetting.

  As shown in FIGS. 2 and 3, the insertion portion 43 is formed with a slit 43a for enabling elastic deformation in the width direction, thereby constituting an elastic deformation portion. In addition, the insertion portion 43 is formed with an inclined surface 43b for facilitating insertion into the through hole of the printed wiring board, and is a protrusion that prevents the insertion portion 43 from coming off after being inserted into the through hole of the printed wiring board. A portion 43c is formed. The slit 43 a is an example of an opening for giving the insertion portion 43 a function as an elastic deformation portion. Therefore, the opening is not limited to a slit, and may be a hole such as a round hole or a long hole.

  The engaging member 4 is preferably made of a material having 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. Can do. Note that the exposed portion 40 of the engaging member 4 may be plated with the same material as the exposed portion 20 of the signal conductor 2. Moreover, it is preferable that the thickness of the engaging member 4 is 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 solder connection portion 22 of the signal conductor 2 against the vibration load. Further, the engaging member 4 is made of the above-described metal material, and its thickness is made thicker than that of the signal conductor 2, so that when the insertion portion 43 of the engaging member 4 is inserted into the through hole of the printed wiring board, The elastic deformation portion having low rigidity is deformed and the engagement member 4 is inserted into the through hole. At this time, if the plate thickness of the engagement member 4 is thin, the engagement member 4 is caused by the pressure from the through hole at the time of insertion. There is a possibility that out-of-plane deformation occurs in the thickness direction. When out-of-plane deformation occurs in the engaging member 4, the deformed portion comes into contact with the end portion or the inner surface of the through hole and becomes resistance, thereby inhibiting insertion of the engaging member 4. By increasing the thickness of the engaging member 4, it is possible to suppress out-of-plane deformation when the printed wiring board is inserted into the through hole.

(Positioning member)
As shown in FIGS. 1 and 2, positioning members 6 are arranged in parallel with the signal conductor 2 on both sides of the plurality of signal conductors 2 arranged in parallel. As shown in FIG. 3, the positioning member 6 is exposed from the end portion 5 c of the fixing member 5 similarly to the signal conductor 2, the both end portions are bent by the bending portion 60, and the insertion portion 61 is formed at the tip portion. Is formed.

  The positioning member 6 is formed of, for example, the same copper or copper alloy as the signal conductor 2. The surface of the positioning member 6 may be plated similar to the signal conductor 2.

  The positioning member 6 is made of the same metal material as the signal conductor 2 and is formed in parallel with the signal conductor 2, so that the positioning member 6 is covered with the insulating film 30 via the adhesive 31 at the same time as the signal conductor 2, and is flexible flat The cable 1 can be integrally formed.

(Layer structure of flexible flat cable)
FIG. 4 is a cross-sectional view taken along the line AA of 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 has an engagement member 4 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 them. The joint member 4 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 solder connection 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 the signal conductor 2, like the engaging member 4, such as phosphor bronze or iron (Fe) -nickel (Ni) alloy. Is used. If it is the material which satisfy | fills said conditions, the metal plate 52 for reinforcement may use the same material as the engaging member 4, and may use a different material. 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 engaging member 4, a higher reinforcing effect in the vicinity of the solder connection portion 22 of the signal conductor 2 against the vibration load can be obtained.

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

  FIG. 5 is a plan view of the engaging member 4 with the fixing member 5 partially removed to show the shape of the engaging member 4. The figure shows a state before the engagement member 4 is bent. The engaging member 4 has a wide portion 45 wider than the exposed portion 40. This also provides the effect of reinforcing the vicinity of the solder connection portion 22 of the signal conductor 2.

(Method for manufacturing flexible flat cable)
Next, an example of the manufacturing method of the flexible flat cable 1 of this Embodiment is demonstrated. First, a plurality of signal conductors 2, a pair of engaging members 4, and a pair of positioning members 6 are prepared. Next, the insulating film 30 is bonded to the plurality of signal conductors 2 and the pair of positioning members 6 using the adhesive 31 to form the covering member 3.

  Next, the engaging member 4 is arranged at a position close to both ends where the signal conductor 2 on the one surface 3a side of the covering member 3 covering the signal conductor 2 and the pair of positioning members 6 is exposed, and the covering member The reinforcing metal plate 52 is disposed at a position close to both ends where the signal conductor 2 on the other surface 3b side of the exposed portion 3 is exposed, and the engaging member 4, the reinforcing metal plate 52, and the insulating film are used using an adhesive 51. 50 is bonded to the covering member 3.

(Mounting method on printed wiring board)
Next, the mounting method to the printed wiring board 10 of the flexible flat cable 1 which concerns on this Embodiment is demonstrated with reference to drawings.

  FIG. 6 is a main part plan view showing a state in which the terminal portion 1 b of the flexible flat cable 1 is mounted on the printed wiring board 10. FIG. 7 is a main part plan view showing a state where the engaging member 4 and the positioning member 6 shown in FIG. 6 are inserted into the through holes 15 and 16. FIGS. 8A and 8B are diagrams for explaining the alignment of the engaging member 4 by the insertion portion 43. FIG. 8A is a diagram showing the relationship between the insertion portion 43 and the through hole 15, and FIG. It is a figure which shows the relationship between the size of the engagement member 4, and a movable amount.

  As shown in FIG. 6, 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 electrode portion (first electrode) to which the solder connection portion 22 of the signal conductor 2 is solder-connected. Part) 12 </ b> A and the electrode part (second electrode part) 12 </ b> B to which the solder connection part 42 of the engagement member 4 is solder-connected, and the electrode part 12 </ b> A, 12 </ b> B on the surface of the insulating base 11. A solder resist 13 and through holes 15 and 16 penetrating the insulating substrate 11 are provided. The insertion portion 43 of the engaging member 4 is inserted into the through hole 15, and the insertion portion 61 of the positioning member 6 is inserted into the through hole 16.

  As shown in FIG. 7, the diameters of the through holes 15 and 16 are D1 and D2, respectively. The width and thickness of the insertion portion 43 of the engaging member 4 are W1 and t1, respectively, and the width and thickness of the insertion portion 61 of the positioning member 6 are W2 and t2, respectively.

  As shown in FIG. 8A, when the insertion portion 43 of the engagement member 4 having the width W1 and the thickness t1 is inserted into the through-hole 15 having the diameter D1, the engagement member 4 has a maximum xa in the thickness direction x. Only a maximum of ya in the width direction y. Here, as shown in FIG. 8B, when the diameter D1 of the through hole 15 is 2 mm, the width W1 of the insertion portion 43 of the engagement member 4 is 1.9 mm, and the thickness t1 is 0.2 mm, the above xa, ya Is estimated to be xa = 0.21 mm and ya = 0.05 mm. That is, the movement amount in the thickness direction x is larger than that in the width direction y. The amount of movement (xa, ya) affects the alignment accuracy between the solder connection portion 22 of the signal conductor 2 and the electrode portion 12A of the printed wiring board 10. The smaller the amount of movement, the more accurate alignment can be performed. In the state shown in FIG. 8, the alignment accuracy of the engagement member 4 in the width direction (y direction in FIG. 8) is better than the thickness direction of the engagement member 4 (x direction in FIG. 8). Therefore, in order to improve the alignment accuracy in two orthogonal directions (x direction and y direction), in addition to the engaging member 4 shown in FIG. 8, the width of the insertion portion 43 of the engaging member 4 in FIG. The insertion portion 61 of the positioning member 6 is provided so that the direction intersecting the direction, for example, the direction orthogonal to the width direction, is the width direction, and the insertion portion 43 of the engaging member 4 and the insertion portion 61 of the positioning member 6 are passed through the printed wiring board 10. By inserting the holes 15 and 16 respectively, it is possible to simultaneously improve the alignment accuracy in the two orthogonal directions.

  FIG. 9A to FIG. 9F are main part cross-sectional views showing the terminal part of the flexible flat cable according to the embodiment of the present invention.

  As shown in FIG. 9A, the printed wiring board 10 on which the flexible flat cable 1 is mounted includes an insulating base 11, an electrode portion 12A and a solder resist 13 formed on the surface 11a of the insulating base 11, and an electrode portion 12A. A solder 14 </ b> A formed on the surface and through holes 15 and 16 penetrating the insulating base material 11 are provided.

  The through holes 15 and 16 of the printed wiring board 10 are in a state in which the printed wiring board 10 is 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-holes 15 and 16 after the drilling process.

  As shown in FIG. 9A, the insertion portion 43 of the engaging member 4 is inserted into the through hole 15 of the printed wiring board 10 from the surface 11 a side of the printed wiring board 10. The width W3 between the upper ends 43d of the protrusions 43c of the insertion portion 43 of the engaging member 4 is larger than the diameter D1 of the through-hole 15 when the insertion portion 43 is not inserted into the through-hole 15 (that is, W3> D1).

  In addition, the width W1 of the upper portion 44 from the protrusion 43c of the insertion portion 43 is set to be smaller than the diameter D1 of the through hole 15 (that is, W1 <D1). By making the size (width W1 and thickness) in the direction orthogonal to the insertion direction of the upper portion 44 of the engaging member 4 smaller than the diameter D1 of the through hole 15, the electrode portion of the printed wiring board 10 pre-coated with the solder 14A When the solder connection portion 22 of the signal conductor 2 is disposed on 12A and the solder 14A is heated and melted, the engagement member 4 receives resistance from the through hole 15 due to the downward displacement of the engagement member 4. It will be possible to follow.

  When the engaging member 4 is further inserted into the through hole 15 of the printed wiring board 10, the elastically deforming portion is gradually deformed in the direction of narrowing the width by the pressure from the inner surface of the through hole 15. When further inserted, as shown in FIG. 9B, the upper end 43d of the projection 43c is also inserted into the through hole 15, and moves in the insertion direction (downward in the figure) while contacting the inner surface of the through hole 15. At this time, the portion 44 above the upper end 43d of the protrusion 43c moves in the insertion direction without contacting the inner surface of the through hole 15 because the width W1 of this portion is equal to or smaller than the diameter D1 of the through hole 15.

  When the engagement member 4 is further inserted, the upper end 43d of the protrusion 43c protrudes from the through hole 15 as shown in FIG. 9C. At this time, the insertion portion 61 of the positioning member 6 is inserted into the through hole 16. When the upper end 43d of the projection 43c protrudes from the through hole 15, the elastically deformed portion is deformed by an elastic force in the outside, that is, in the direction in which the width increases, and is restored to the width W3 before being inserted into the through hole 15. Since the maximum width W3 of the insertion portion 43 of the engagement member 4 is larger than the diameter D1 of the through hole 15, the upper end 43d of the projection 43c comes into contact with and is locked on the back surface of the printed wiring board 10, and vibrations It is possible to prevent the engaging member 4 from coming off in the direction opposite to the insertion direction when a mechanical load acting due to the above is applied.

  Further, the solder connection portion 22 of the signal conductor 2 is inserted into the through holes 15 and 16 of the printed wiring board 10 by inserting the engaging member 4 and the positioning member 6 into the printed wiring board 10 to which the solder connection portion 22 is connected. Positioning with the corresponding electrode portion 12A is performed. That is, the signal conductors 2 are respectively connected to the corresponding electrode portions 12A of the printed wiring board 10 by the insertion portion 43 functioning as an elastic deformation portion provided in the engaging member 4 and the projection portion 43c provided in the insertion portion 43. The flexible flat cable 1 can be temporarily fixed to the printed wiring board 10 in the aligned state.

  The electrode portion 12A is exposed from the solder resist 13 formed on the surface 11a of the printed wiring board 10, and can be electrically connected to the solder connection portion 22 of the signal conductor 2. Since the upper end 43d of the protrusion 43c of the engaging member 4 penetrates and is locked to the back surface 11b of the printed wiring board 10, the solder connection portion 22 of the signal conductor 2 is applied in advance on the electrode portion 12A. It is fixed in a state of being disposed on the solder 14A. Since the width W1 of the portion 44 above the upper end 43d of the protrusion 43c located inside the through hole 15 is smaller than the diameter D1 of the through hole 15, even if it does not contact or partially contacts the inner surface of the through hole 15. It is held in a state where it does not receive excessive pressure.

  The solder 14A is melted by heating the solder connection portion 22 of the signal conductor 2 of the flexible flat cable 1 held in the state shown in FIG. 9C, and the solder connection portion of the signal conductor 2 as shown in FIG. 9D. 22 and the electrode part 12A of the printed wiring board 10 are connected by solder 14A. When the solder 14A is melted, the weight of the flexible flat cable 1 or solder connection using a heating tool causes the solder connection portion 22 to move downward due to the load applied from the upper portion of the solder connection portion 22. In FIG. It is displaced so as to sink in the direction of the plate 10. As described above, the upper portion 44d from the upper end 43d of the projection 43c is not subjected to pressure from the inner surface of the through hole 15, so that the engaging member inserted into the through hole 15 easily follows the displacement due to this solder connection. 4 is also displaced downward. In a state where the solder 14A is solidified and the solder connection portion 22 of the signal conductor 2 is connected to the electrode portion 12A, the solder 14A is disposed between the upper end 43d of the protrusion 43c of the engagement member 4 and the back surface 11b of the printed wiring board 10. A gap S corresponding to the sinking displacement of the connecting portion 22 is generated.

  Since the engaging member 4 follows the displacement due to the sinking when the solder is melted as described above, it can sink without receiving resistance from the outside, so that the solder wettability to the solder connection portion 22 is improved. In addition, voids (voids) can be eliminated, and a good solder connection in which a solder fillet is formed can be obtained.

  As described above, the engaging member 4 is disposed at both ends of the covering member 3 so as to cross the plurality of signal conductors 2 in the width direction, and the fixing member 5 of the engaging member 4 is the signal conductor. 2 is a reinforcing member that suppresses deformation due to a mechanical load in the vicinity of the end portion 5c of the fixing member 5 and the solder connection portion 22.

  In order to further improve the deformation suppressing effect by the engaging member 4, as shown in FIGS. 9E and 9F, the solder connecting portion 42 of the engaging member 4 is connected to the electrode portion of the printed wiring board 10 in the same manner as the signal conductor 2. Solder connection to 12B. As shown in FIG. 9E, the flexible flat cable 1 including the engaging member 4 is inserted on the surface of the printed wiring board 10 by inserting the insertion portion 43 of the engaging member 4 into the through hole 15 of the printed wiring board 10. Be placed. Solder 14A and 14B are applied in advance to the electrode portions 12A and 12B of the printed wiring board 10 corresponding to the solder connection portion 22 of the signal conductor 2 and the solder connection portion 42 of the engaging member 4, respectively. By heating and melting the solder in this state, the signal conductor 2 and the solder connection portions 22 and 42 of the engagement member 4 are connected to the electrode portions 12A and 12B, respectively.

  Note that the solders 14A and 14B applied to the electrode portions 12A and 12B of the printed wiring board 10 are supplied as paste solder containing a flux, a solvent, and the like. Alternatively, it may be a solder in a state where paste-like solder is applied to the electrode portions 12A and 12B of the printed wiring board 10 and then heated and melted to be solidified.

(Effect of this embodiment)
According to the present embodiment, according to the flexible flat cable provided with the engaging member 4 and the mounting body using the same, the signal conductor of the flexible flat cable is applied to the electrode portion 12A of the printed wiring board 10 pre-coated with solder. Even when the exposed portions 20 of the two are directly connected by solder, the exposed portions 20 of the signal conductor 2 are accurately aligned with the corresponding electrode portions 12A of the printed wiring board 10 in the longitudinal direction and the width direction of the signal conductor 2. In this state, after temporarily fixing, following the sinking operation of the exposed portion 20 of the signal conductor 2 at the time of melting the solder, it is possible to suppress problems at the time of solder connection, A stable and highly reliable solder connection can be realized even with respect to a thermal load. In addition, the occurrence of damage at the solder connection portion 22 of the signal conductor 2 due to vibration deformation of the flexible flat cable 1 itself when a mechanical load is applied is suppressed, and the flexible flat cable 1 is mounted on the printed wiring board 10. It is possible to provide a sound flexible flat cable in which an increase in the number is suppressed and a mounting body of the flexible flat cable on a printed wiring board. Specifically, according to the present embodiment, the following effects can be obtained.

(A) The engaging member 4 and the positioning member 6 are formed of a metal plate, and the width directions of the insertion portions 43 and 61 of the engaging member 4 and the positioning member 6 intersect each other, for example, directions orthogonal to each other. Since the insertion portions 43 and 61 are inserted into the through holes 15 and 16 of the printed wiring board 10, the exposed portion 20 of the signal conductor 2 and the printed wiring in the longitudinal direction and the width direction of the signal conductor 2. Position alignment with the electrode part 12A of the board 10 can be performed with high accuracy. (B) As described above, the engaging member 4 is composed of the insulating film 50 and the adhesive 51 made of the same material as the insulating film 30 and the adhesive 31 covering the signal conductor 2 and the positioning member 6 together with the reinforcing metal plate 52. The laminated structure is the same as that of the cable body 1a. By adopting such a structure, the laminated structure of the engaging member 4 and the reinforcing metal plate 52 can be formed by the same manufacturing method as the cable body 1a.
(C) Furthermore, the cable body 1a, the engaging member 4 and the reinforcing metal plate 52 are laminated in a predetermined arrangement via the insulating films 30 and 50 and the adhesives 31 and 51, and these are integrated by a laminating process. Is possible. By such integrated manufacturing, the engaging member 4 and the reinforcing metal plate 52 are firmly bonded and fixed to the cable body 1a.
(D) The engagement member 4 is provided so as to cross the signal conductor 2 in the width direction in the vicinity of the end of the covering member 3 in a direction substantially orthogonal to the longitudinal direction of the signal conductor 2. Can be used as a reinforcing member in the vicinity of the solder connection portion 22 of the signal conductor 2.
(E) By reinforcing the vicinity of the solder connection portion 22, when a mechanical load such as vibration is applied, the stress generated in the solder connection portion 22 and the signal conductor 2 in the vicinity thereof can be reduced, and the breakage occurs. Can be suppressed.
(F) Deformation in the thickness direction of the flexible flat cable 1 in the vicinity of the solder connection portion 22 of the signal conductor 2 by the portion (for example, the wide portion 45) of the engaging member 4 except the insertion portion 43 and the reinforcing metal plate 52. Can be suppressed. Thereby, when a mechanical load such as vibration is applied to the solder connection portion 22 of the signal conductor 2, it is possible to reduce the stress generated in the solder connection portion 22 and the vicinity thereof. The stress suppressing effect by the engaging member 4 can be further enhanced by an increase in rigidity due to the thickness of the engaging member 4 and the reinforcing metal plate 52 being thicker than that of the signal conductor 2.
(G) Since the engaging member 4 is integrally formed with the cable body 1a via the insulating film 30 and the adhesive 31, the engaging member 4 is firmly bonded to the cable body 1a. Even when a vibration load acts on the flexible flat cable 1 due to this strong adhesion, no peeling occurs at the adhesion portion between the engagement member 4 and the cable body 1a, and the signal conductor 2 by the engagement member 4 described above. The stress reduction effect in the vicinity of the solder connection portion 22 can be stably maintained.
(H) Further, by using the flexible flat cable 1 in which the engaging member 4 is integrally formed with the signal conductor 2 in a well-managed manufacturing process, the solder connecting portion 22 of the signal conductor 2 and the engaging member 4 are used. The positional accuracy relative to the insertion portion 43 to be inserted into the through hole 15 of the printed wiring board 10 can be increased.
(I) A plurality of solder connection portions 22 of the signal conductor 2 and the corresponding electrodes of the printed wiring board 10 can be obtained simply by inserting the engagement member 4 manufactured with high precision into the through hole 15 of the printed wiring board 10. Positioning with the portion 14A can be performed with high accuracy and ease.
(J) Further, the integration can suppress an increase in the number of components and can simplify the mounting and assembling work.

(Modification 1)
FIG. 10 is a cross-sectional view of a main part showing a joining method of the engaging member 4 and the positioning member 6 as the first modification. The through holes 15 and 16 of the printed wiring board 10 are formed as through holes by forming electrode portions 17 and 18 made of a metal material such as gold or nickel on the inner surface, and the insertion portions of the engagement member 4 are inserted into the through holes 15 and 16. 43 and the insertion portion 61 of the positioning member 6 may be inserted, and the insertion portions 43 and 61 may be joined to the electrode portions 17 and 18 of the through holes 15 and 16 by solder 19a and 19b as an example of a joining material.

  The joining of the insertion portion 43 of the engaging member 4 and the electrode portion 17 of the through hole 15 and the joining of the insertion portion 61 of the positioning member 6 and the electrode portion 18 of the through hole 16 are performed by soldering the signal conductor 2. It may be performed at the same time as the joining of the portion 22 and the electrode portion 12A, or after the solder connection portion 22 of the signal conductor 2 is connected. Further, the joining between the insertion portion 43 of the engaging member 4 and the electrode portion 17 of the through hole 15 and the joining of the insertion portion 61 of the positioning member 6 and the electrode portion 18 of the through hole 16 are made of a metal material such as solder. In addition to bonding, bonding may be performed using an adhesive mainly composed of a resin material such as epoxy, acrylic, or polyimide.

(Modification 2)
In FIG. 9D and FIG. 9F, the example which mounted the terminal part 1b of the one side of the flexible flat cable 1 in the printed wiring board 10 was shown. When connecting at least two laminated printed wiring boards with a flexible flat cable, both terminal portions 1b are respectively mounted on the printed wiring board. The connection state is shown in FIG.

  9A to 9D, one terminal portion 1b of the flexible flat cable 1 is mounted on the first printed wiring board 10A (the lower printed wiring board in the figure). The first and second printed wiring boards 10A and 10B are stacked one above the other (in FIG. 11, the printed wiring board 10A is on the lower side), the flexible flat cable 1 is bent at the center 1c, and the upper second printed wiring board is placed. The insertion portion 43 of the engaging member 4 and the insertion portion 61 of the positioning member 6 can be inserted into the through holes 15 and 16 from the surface side of 10B. Similarly, by the mounting method shown in FIGS. 9A to 9D, the other terminal portion 1b of the flexible flat cable 1 is mounted on the second printed wiring board 10B as shown in FIG. 11, and the stacked printed wiring boards 10A and 10B are stacked. They are connected with a flexible flat cable 1.

  When mechanical vibration is applied to a device on which a printed wiring board mounted product in which the first and second printed wiring boards 10A and 10B stacked as shown in FIG. 11 are connected by the flexible flat cable 1 is loaded, In some cases, the flexible flat cable 1 itself connecting the printed wiring boards also undergoes large vibration deformation due to a resonance phenomenon. In particular, when vibration deformation in the thickness direction of the printed wiring board 10 </ b> B (vertical direction in FIG. 11) occurs in the flexible flat cable 1, the vibration deformation concentrates in the vicinity of the solder connection portion 22 that becomes the fixed end of the signal conductor 2. High stress is generated in the upper end portion of the solder 14A of the solder connection portion 22, the exposed portion 20 of the signal conductor 2 in the vicinity of the end portion 5c of the fixing member 5, and the like.

  In the flexible flat cable 1 provided with the engaging member 4 according to the present invention, the engaging member 4 made of a metal plate and the reinforcing metal plate 52 are disposed in the vicinity of the end of the covering member 3 of the flexible flat cable 1. These members serve as a reinforcing member that suppresses deformation due to a mechanical load near the end of the covering member 3 of the signal conductor 2 and the solder connection portion 22, and can suppress vibration deformation and disperse high stress concentration. .

  Further, in the present embodiment, the solder connection portion 42 provided on the exposed portion 40 of the engagement member 4 is solder-connected to the electrode portions 12B of the printed wiring boards 10A and 10B in the same manner as the signal conductor 2. By connecting to the printed wiring boards 10A and 10B, the flexible flat cable 1 is firmly fixed to the printed wiring boards 10A and 10B via the engaging member 4. The vibration deformation generated in the terminal portion 1b of the flexible flat cable 1 is remarkably reduced by the restraint by the printed wiring boards 10A and 10B, and the generated stress is also reduced. By these, the flexible flat cable 1 which improved the tolerance with respect to a vibration load can be provided.

(Modification 3)
FIG. 12 is a principal plan view showing a positioning member 6 of a flexible flat cable 1 as a third modification of the present embodiment. In the present embodiment, as shown in FIG. 6 and the like, the positioning members 6 are provided on both sides of the plurality of signal conductors 2. However, in the third modification, the positioning member 6 is provided on one of the plurality of signal conductors 2. It is provided on the side. In this case, one through hole 16 is formed in the printed wiring board 10 at a position corresponding to the positioning member 6.

(Modification 4)
FIG. 13 is a main part plan view showing the positioning member 6 of the flexible flat cable 1 according to Modification 4 of the present embodiment. In the present embodiment, as shown in FIG. 6 and the like, the positioning members 6 are provided on both sides of the plurality of signal conductors 2. However, in the fourth modification, the positioning members 6 are arranged at the center of the plurality of signal conductors 2. It is provided at an arbitrary position. In this case, one through hole 16 is formed in the printed wiring board 10 at a position corresponding to the positioning member 6.

(Modification 5)
FIG. 14 is a plan view showing a state where the engaging member 4 of the flexible flat cable 1 according to the fifth modification of the present embodiment is developed. FIG. 15 is a principal plan view showing a state in which the engaging member 4 shown in FIG. 14 is bent and inserted into the through hole of the printed wiring board.

  In the fifth modification, the insertion portion 43 of the engaging member 4 is formed so as to extend in a direction perpendicular to a bending line 47 inclined by 45 degrees with respect to a center line 46 parallel to the longitudinal direction of the engaging member 4. Yes. That is, the engagement member 4 has a bent portion 41 c that is bent so that the insertion portion 43 is inserted into the through hole 15 of the printed wiring board 10 along a bending line 47 that is inclined 45 degrees with respect to the center line 46. As shown in FIG. 15, by inserting such an engaging member 4 into the through hole 15 of the printed wiring board 10, the printed wiring board corresponding to the solder connecting portion 22 of the signal conductor 2 by the engaging member 4 is used. Positioning in two orthogonal directions (x direction and y direction in FIG. 15) with 10 electrode portions 12A can be performed with high accuracy. The bend line 47 may be 45 degrees clockwise or 45 degrees counterclockwise from the center line 46 as long as it is inclined 45 degrees with respect to the center line 46, and is the same or different between both ends of the engagement member 4. It may be. Further, the inclination angle of the fold line 47 is not limited to 45 degrees.

  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. In the embodiment described above, the through hole 16 is formed as a hole in the printed wiring board 10 into which the insertion portion 61 of the positioning member 6 is inserted.

  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, 1a ... Cable main body, 1b ... Terminal part, 1c ... Central part, 2 ... Signal conductor, 3 ... Cover member, 3a ... One side, 3b ... The other side, 4 ... Engagement member, DESCRIPTION OF SYMBOLS 5 Fixing member, 5a ... Upper surface, 5b ... Lower surface, 5c ... End part, 6 ... Positioning member, 10 ... Printed wiring board, 10A ... 1st printed wiring board, 10B ... 2nd printed wiring board, 11 ... Insulation base Material, 11a ... front surface, 11b ... back surface, 12A, 12B ... electrode part, 13 ... solder resist, 14A, 14B ... solder, 15, 16 ... through-hole, 17, 18 ... electrode part, 20 ... exposed part, 21a, 21b ... bent portion, 22 ... solder connecting portion, 22a ... lower surface of solder connecting portion, 30 ... insulating film, 31 ... adhesive, 40 ... exposed portion, 41a, 41b, 41c ... bent portion, 42 ... solder connecting portion, 42a ... Solder connection 43 ... insert part, 43a ... slit, 43b ... inclined surface, 43c ... projection, 43d ... upper end, 44 ... upper part, 45 ... wide part, 46 ... center line, 47 ... fold line, 50 ... insulating film 51 ... Adhesive, 52 ... Reinforcing metal plate, 60 ... Bending part, 61 ... Insertion part, D1, D2 ... Diameter, S ... Gap, W1, W2, W3 ... Width,

Claims (9)

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
A through hole in which an insertion portion formed in an end portion extending in the width direction is provided in a position close to at least one of the both end portions where the plurality of conductors on the covering member are exposed. An engaging member inserted into and engaged with,
A fixing member for fixing the engaging member to the covering member;
A flat wiring member provided with a positioning member that is arranged in parallel to the plurality of conductors and that inserts an insertion portion formed at a tip portion into a hole formed in the mounted substrate to position the plurality of conductors.   The flat wiring member according to claim 1, wherein the engagement member is disposed such that a direction orthogonal to a longitudinal direction of the conductor is a longitudinal direction of the engagement member. The engaging member and the positioning member are formed of a metal plate,
3. The flat wiring member according to claim 1, wherein the engaging member and the positioning member are formed such that the width directions of the respective insertion portions intersect each other. 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
A through hole in which an insertion portion formed in an end portion extending in the width direction is provided in a position close to at least one of the both end portions where the plurality of conductors on the covering member are exposed. An engaging member inserted into and engaged with,
A fixing member that fixes the engaging member to the covering member;
The insertion member of the engaging member is a flat wiring member that is inclined at a predetermined angle with respect to the width direction.   The insertion portion of the engagement member includes an opening that can be elastically deformed when inserted into the through hole, and a protrusion that prevents the insertion member from slipping in the direction opposite to the insertion direction after being inserted into the through hole. The flat wiring material according to claim 1, comprising: 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 The insertion portion formed at the end extending in the width direction is inserted into the through hole formed in the mounted substrate and is engaged with the at least one end of the both ends where the conductor is exposed. A joint member, a fixing member that fixes the engaging member to the covering member, and an insertion portion that is disposed in parallel with the plurality of conductors and that is formed at the tip portion is inserted into a hole formed in the mounted substrate. A flat wiring member provided with a positioning member for positioning the plurality of conductors;
The through hole into which the insertion portion of the engaging member of the flat wiring member is inserted, the hole into which the insertion portion of the positioning member is inserted, and an electrode portion to be solder-connected to the plurality of conductors A mounted substrate having,
An implementation with The mounting substrate includes a first electrode portion solder-connected to the plurality of conductors and a second electrode portion solder-connected to the engagement member on a surface on which the flat wiring member is mounted. Prepared,
The plurality of conductors of the flat wiring member includes a first connection portion solder-connected to the first electrode portion of the mounted substrate,
The engagement member includes a second connection portion that is solder-connected to the second electrode portion of the mounted substrate,
The insertion portion of the engaging member and the insertion portion of the positioning member are formed by connecting the first and second electrode portions and the first and second connection portions with the flat wiring member, respectively. The mounting body according to claim 6, which has a shape that allows displacement in the insertion direction. The engagement member of the flat wiring member is a pair of engagement members provided at positions close to each of the both ends where the plurality of conductors on the covering member are exposed,
The insertion portion of the positioning member of the flat wiring member is a pair of insertion portions formed on each of the two end portions,
The mounting substrate is solder-connected to each of the both end portions where the plurality of conductors of the flat wiring member are exposed, and the insertion portions of the pair of engaging members are respectively inserted into the through holes, and the positioning member The mounting body according to claim 6 or 7, wherein the pair of insertion portions are first and second mounted substrates respectively inserted into the holes. 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 The insertion portion formed at the end extending in the width direction is inserted into the through hole formed in the mounted substrate and is engaged with the at least one end of the both ends where the conductor is exposed. A flat member that includes a joint member and a fixing member that fixes the engaging member to the covering member, and the insertion portion of the engaging member is inclined at a predetermined angle with respect to the width direction;
A mounting substrate having the through-hole into which the insertion portion of the engaging member of the flat wiring member is inserted, and an electrode portion solder-connected to the plurality of conductors;
An implementation with

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