JP2008171596A - Flexible flat harness and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible flat harness in which flexibility is maintained, which is high in an allowable current value and waterproof characteristics, which has superior durability even in a water wetted environment, which is easy to manufacture, and in which productivity can be improved. <P>SOLUTION: The flexible flat harness 10 is equipped with a flexible printed board 20, an elastic protective member 30 which covers an outer peripheral surface of this flexible printed board 20 and which has waterproof characteristics, and sheets 61, 62 for cooling arranged, for example, inside of the both face side elastic protective member 30 of the flexible printed board 20. The elastic protective member 30 has a waterproof plug of a form of blocking an insertion hole of a waterproof connector in the vicinity of the end part of the flexible printed board 20. In the flexible printing board 20, since the terminal part is water stopped in the insertion holes of the respective waterproof connectors by the waterproof plugs, and covered with the elastic protective member 30 including the sheet 61, 62 for cooling, while maintaining flexibility, the high allowable current value, the waterproof characteristics, and durability are realized. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a flexible flat harness composed of a flexible printed circuit (FPC) and the like, and a manufacturing method thereof, and more particularly to a flexible flat harness having a structure excellent in waterproofness and a manufacturing method thereof.

  For wiring of automobiles and office automation equipment, wire harnesses with a structure in which a plurality of electric wires are bundled are generally used. However, in recent years, due to demands for higher wiring density, it is lighter, thinner and higher density. Flexible flat harnesses using flexible printed circuit boards that can be made as wiring members have been widely used.

  In such a flexible flat harness, for example, a wiring made of a conductor pattern is formed by etching or the like on a copper-clad laminate in which a rolled copper foil is laminated on one side of a base film made of an insulating resin, and covered with a protective film such as a coverlay. It consists of a structure using a flexible printed circuit board instead of a plurality of electric wires.

  And in the connector using this flexible printed circuit board as a harness, for example, the child housing has a terminal support portion, and the terminal support portion supports the connection terminal in a state in which the distal end portion and the base end portion protrude outward. Some terminal support portions are provided with a lid that can be freely opened and closed via a hinge. The cover of this connector covers and clamps the connection part between the terminal part of the flexible flat harness and the base end part of the connection terminal from both sides in the connection direction, and water absorption tape is attached to the outer edge part of the opposing surface of the cover body. Each is provided, and the water absorbing tape is configured to seal the inside of the lid body by absorbing and expanding water (see, for example, Patent Document 1).

In addition, when the flexible printed circuit board seal body is fitted to the connector's fitting part, and the contact part of this flexible printed circuit board is connected to the press contact terminal, the locking protrusion can be engaged with and disengaged from the locking hole. A device that is configured to be locked to prevent moisture from entering the connector is also known (for example, see Patent Document 2).
JP 2005-347143 A JP 2001-155815 A

  However, in the conventional connectors disclosed in Patent Document 1 and Patent Document 2 described above, the flexible printed circuit board formed of an insulating film made of a water-absorbing material is used as a harness in a bare state. For this reason, when used in a wet environment, there is a problem that each characteristic such as mechanical characteristics, electrical characteristics and insulation characteristics may be remarkably deteriorated. Further, when exposed to a wet environment for a long period of time, there is a problem that the conductor pattern of the flexible printed circuit board is corroded, and there is a risk that problems such as disconnection and short circuit may occur. Furthermore, as the permissible current value increases with the increase in the density of the conductor pattern, the flexible printed circuit board tends to generate heat. Similarly, when used in a high temperature environment such as an engine room of an automobile, the mechanical characteristics are similarly increased. In addition, there is a problem that electrical characteristics are deteriorated.

  The present invention has been made in view of the above points, and while maintaining flexibility, the allowable current value and waterproofness are high, and it has excellent durability even in a wet environment, and can be easily manufactured and productive. It aims at providing the flexible flat harness which can improve, and its manufacturing method.

  A flexible flat harness according to the present invention includes a flexible printed board having a conductor pattern formed on an insulating film, a waterproof elastic protective member covering an outer peripheral surface excluding an end of the flexible printed board, and the flexible printed board. And a cooling sheet disposed inside the elastic protective member on at least one surface side.

  By configuring the flexible flat harness according to the present invention as described above, a flexible printed circuit board having a structure that is easy to absorb water and corrodes in a wet environment has a cooling sheet disposed inside at least one surface thereof. Because the outer peripheral surface is covered with a waterproof elastic protective member, the allowable current value and waterproofness are high while maintaining flexibility, so that it can have excellent durability even in a wet environment. Become.

  The elastic protection member is formed, for example, in the vicinity of the end of the flexible printed circuit board as a waterproof plug having a shape that closes the insertion hole of the connector housing into which the end of the flexible printed circuit board is inserted. In addition, the waterproof plug includes a locking claw for preventing removal that engages with a locking piece formed inside the insertion hole of the connector housing, for example. Further, the flexible printed circuit board has, for example, a locking hole that engages with a lance formed in the connector housing at an end portion.

  The elastic protection member may be configured to include an integrally formed fixing clip for attaching and fixing the flexible printed board to the fixing member at a predetermined position on the flexible printed board. In addition, the elastic protection member may be configured to include a separate fixing clip that is insert-molded to attach and fix the flexible printed circuit board to the fixing member at a predetermined position on the flexible printed circuit board. Good. The elastic protection member is made of rubber or elastomer.

  The manufacturing method of the 1st flexible flat harness which concerns on this invention is a manufacturing method of the flexible flat harness formed by arranging the planar conductor which has flexibility, Comprising: The conductor pattern was formed on the insulating film The flexible printed circuit board is sandwiched by a movable pin from the thickness direction in the mold having a space for molding the outer shape of the flexible flat harness, and the cooling sheet is attached to at least one surface side of the flexible printed circuit board. A step of sandwiching the flexible printed circuit board and the cooling sheet in the air from the thickness direction in the space and placing the flexible printed circuit board and the cooling sheet in a floating state in the space, and enclosing the cooling sheet when cured A waterproof elastic cover that covers the outer peripheral surface of the flexible printed circuit board. Filling the space with insulating resin constituting the member to form the outer shape of the flexible flat harness, pulling the movable pin out of the space and filling the hole with the insulating resin And filling the hole portion.

  The manufacturing method of the 2nd flexible flat harness which concerns on this invention is a manufacturing method of the flexible flat harness formed by juxtaposing the planar conductor which has flexibility, Comprising: The conductor pattern was formed on the insulating film The flexible printed circuit board is disposed in a state of floating in the space of the mold having a space for molding the outer shape of the flexible flat harness, and the cooling sheet is disposed on at least one surface side of the flexible printed circuit board. A step of temporarily fixing by fixing components respectively arranged in a floating state in the space, and a waterproof property that covers the outer peripheral surface of the flexible printed circuit board together with the fixing components while enclosing the cooling sheet when cured. An insulating resin constituting the elastic protection member is filled in the space to fill the flexible flat. Characterized in that it comprises a step of forming the outline of the harness.

  The manufacturing method of the 1st and 2nd flexible flat harness which concerns on this invention is comprised as mentioned above, At least one of the outer peripheral surface of the flexible printed circuit board of the structure which is easy to absorb water and to corrode in a to-be-watered environment Since a flexible flat harness having a structure covered with a waterproof elastic protective member that encloses a cooling sheet disposed on the surface side can be easily manufactured, the allowable current value and waterproofing can be maintained while maintaining flexibility. The productivity of the flexible flat harness having high durability and excellent durability even in a wet environment can be improved.

  According to the present invention, while maintaining the flexibility of the flexible flat harness, the allowable current value and waterproofness are high, and it has excellent durability even in a wet environment, and can be easily manufactured to improve productivity. It becomes.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing an example of a harness with a waterproof connector using the flexible flat harness according to the first embodiment of the present invention in a partially exploded state. 2 is a cross-sectional view taken along the line A-A ′ of FIG. 1, and FIG. 3 is a cross-sectional view taken along the line B-B ′ of FIG. 1. Furthermore, FIG. 4 is a perspective view showing the entire structure of the flexible flat harness, and FIG. 5 is a cross-sectional view for explaining the state of heat conduction of the flexible flat harness.

  As illustrated in FIGS. 1 to 5, the waterproof connector-equipped harness 1 includes a flexible flat harness 10 and a plurality of waterproof connectors 91, 92, and 93 attached to a terminal portion of the flexible flat harness 10. The flexible flat harness 10 includes a flexible printed circuit board 20, a waterproof elastic protection member 30 that covers an outer peripheral surface excluding an end of the flexible printed circuit board 20, and at least one surface side of the flexible printed circuit board 20 (here, both surfaces). And the cooling sheets 61 and 62 disposed inside the elastic protective member 30 on the side).

  The flexible printed circuit board 20 includes an insulating film 21 having insulating properties made of, for example, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide (PI), polyolefin (PO), liquid crystal polymer (LCP), and the like (FIGS. 2 and 2). 3), a plurality of wirings 22 made of a conductor pattern made of gold, silver, copper, carbon, or the like are formed.

  The flexible printed circuit board 20 has a structure in which the insulating film 21 and the wiring 22 are further covered with a cover lay 23 made of a synthetic resin having electrical insulation. In addition, when the flexible printed circuit board 20 is a structure which has the wiring 22 on both surfaces of the insulating film 21, the coverlay 23 is formed so that the insulating film 21 and the wiring 22 of both surfaces may be covered, respectively.

  On the other hand, the waterproof connectors 91 to 93 are made of, for example, a resin molded member, and have insertion holes 91a, 92a, and 93a into which the ends of the flexible flat harness 10 are inserted on the rear end side, and other connectors (see FIG. (Not shown) has a connector fitting hole 95 into which the wiring provided in another connector and the wiring 22 of the flexible printed board 20 of the flexible flat harness 10 are electrically connected inside.

  In addition, the insertion holes 91a to 93a of the waterproof connectors 91 to 93 are formed with locking pieces 99 for engaging waterproof plugs 31, 32, and 33 of the elastic protection member 30 described later, respectively, and connector fitting. The holes 95 are each provided with a lance 94 (see FIG. 3) for locking and fixing the terminal portion of the flexible printed circuit board 20. Further, each waterproof connector 91 to 93 is provided with an engaging portion 96 for engaging with a locking piece (not shown) provided on another connector to prevent the connectors from coming off. .

  The flexible printed circuit board 20 is in a state in which the coverlay 23 is removed and the wiring 22 is exposed at each terminal portion. For example, the flexible printed circuit board 20 is connected to connection terminals (not shown) provided inside the waterproof connectors 91 to 93. It is configured so that it can be easily electrically connected or the exposed wiring 22 can be used as it is instead of the connection terminal. Further, in the vicinity of both ends in the short-side direction of each terminal portion of the flexible printed circuit board 20 is engaged with a lance 94 formed inside each waterproof connector 91 to 93 for positioning the terminal portion within the connector. Locking holes 24 are respectively formed.

  The elastic protection member 30 is made of, for example, rubber (silicon rubber, NBR, EPDM, fluororubber, chloroprene, etc.), an elastomer, and the like. The structure is such that the sheet 61 is covered with cooling sheets 61 and 62 on both sides of the flexible printed circuit board 20. The elastic protective member 30 is formed with waterproof plugs 31 to 33 each having a shape for closing the insertion holes 91a to 93a of the waterproof connectors 91 to 93 into which the terminal portions are inserted in the vicinity of the terminal portions of the flexible printed circuit board 20. Become.

  The waterproof plugs 31 to 33 are provided with hook-shaped water stop pieces 31a, 32a, and 33a that are in close contact with the inner wall surfaces of the insertion holes 91a to 93a with a predetermined pressure when inserted into the waterproof connectors 91 to 93, respectively. Engages the recesses 31c, 32c, 33c (only 31c shown) into which the locking piece 99 formed at predetermined positions inside the insertion holes 91a to 93a fits, and the wall surface of the locking piece 99 on the connector fitting hole 95 side. Locking pawls 31b, 32b, 33b (only 31b is shown) for preventing the waterproof plugs 31-33 from coming out of the insertion holes 91a-93a (that is, the terminal portions of the flexible printed circuit board 20). It is prepared for.

  As shown in FIG. 4, the cooling sheets 61 and 62 are sheet-like members having high thermal conductivity made of a foil material (copper foil, aluminum foil, carbon sheet, etc.) formed with the same dimensions as the flexible printed circuit board 20. And at least one surface side of the flexible printed circuit board 20 whose outer peripheral surface is covered with the elastic protection member 30 is disposed in a state of being sandwiched from the substrate surface at predetermined intervals.

  Therefore, in the flexible flat harness 10 of the present example, the cooling arrows 61 and 62 arranged in this way, as shown in FIG. 5, the arrows in the drawing transmitted from the surface side of the elastic protection member 30 to the flexible printed circuit board 20 side. Since the external heat shown by is released outside before being transmitted to the flexible printed circuit board 20 by the cooling sheets 61 and 62 having high thermal conductivity, the heat resistance of the flexible printed circuit board 20 can be improved and the wiring 22 Electromagnetic compatibility (EMC) can be improved while improving the allowable current value.

  In addition, in the flexible flat harness 10 of this example, it forms so that some of these cooling sheets 61 and 62 may each be exposed from some elastic protection members 30 of the flexible flat harness 10, as shown in FIG. ing. For this reason, the cooling efficiency (cooling performance) of the cooling sheets 61 and 62 can be further improved by mechanically connecting the exposed portion to a member having high thermal conductivity.

  As described above, the insertion holes 91 a to 93 a of the waterproof connectors 91 to 93 are closed by the waterproof plugs 31 to 33 provided in the elastic protection member 30 of the flexible flat harness 10. A structure in which moisture does not enter the connector fitting hole 95 from the insertion holes 91a to 93a side is realized.

  In the waterproof connector-equipped harness 1 configured as described above, the flexible printed circuit board 20 is covered with a waterproof elastic protective member 30 having an outer peripheral surface, and for example, a cooling sheet is provided inside the elastic protective member 30 on both sides. Since 61 and 62 are arranged, it is possible to effectively prevent conduction of external heat to the flexible printed circuit board 20, and the waterproof plug of the elastic protection member 30 in the vicinity of the terminal portion inserted into the waterproof connectors 91 to 93. The structure stopped by 31-33 is realized.

  For this reason, for example, when the insulating film 21 of the flexible printed circuit board 20 is made of polyimide (PI), the water absorption is about 1.3% to 2.9% and is made of polyethylene terephthalate (PET). In this case, the flexible flat harness 10 of this example realizes a structure in which the flexible printed circuit board 20 does not absorb water.

  In addition, when the insulating film 21 of the flexible printed circuit board 20 is made of polyimide (PI), the elongation is about 45 to 80%, and when it is made of polyethylene terephthalate (PET), about 120%. However, in the flexible flat harness 10 of this example, since the elastic protective member 30 is made of a material excellent in elongation (elongation rate of about 500%), the flexibility is not significantly impaired as compared with the case of only PI or PET.

  Thereby, even if it is a case where the harness 1 with a waterproof connector of this example is used in the wet environment which is exposed to water, the flexible printed circuit board 20 which is easy to absorb water and corrode is covered with the elastic protective member 30. Further, for example, because the cooling sheets 61 and 62 are arranged on both sides, it is difficult to be directly affected by external heat, and the allowable current value or the like is maintained while maintaining the flexibility of the harness. High durability and high durability can be realized.

  6 and 7 are explanatory views for enlarging and explaining a part of the flexible flat harness 10 in the waterproof connector-equipped harness 1. Although the waterproof connector-equipped harness 1 can be applied to the wet environment as described above, in such a wet environment, the attachment tape is usually attached to the fixing member to which the waterproof connector-equipped harness 1 is attached. In the case of mounting by, for example, the mounting stability may not be maintained (that is, the mounting tape may be peeled off).

  For this reason, in the harness 1 with waterproof connector of this example, as shown in FIG. 6, for example, the elastic protection member 30 of the flexible flat harness 10 is fixedly attached to the fixing member at a predetermined position on the flexible printed circuit board 20. It may be configured to include a fixing clip 40 for this purpose.

  The fixing clip 40 is integrally formed when the elastic protection member 30 is formed, for example, and is disposed on the base portion 41 that protrudes in a cylindrical shape from the surface of the elastic protection member 30 and on the distal end side of the base portion 41. An umbrella-shaped tip portion 42 inserted into a hole (not shown) provided in the fixing member is provided.

  If the fixing clip 40 is provided on the elastic protection member 30 of the flexible flat harness 10 as described above, the flexible protective substrate 30 and the flexible printed circuit board 20 can be easily attached to the fixing member, and the distal end portion 42 is provided. Since it is hooked and fixed in the hole of the fixing member, the mounting stability can be improved even in a wet environment.

  Instead of the fixing clip 40 integrally formed with the elastic protection member 30, the elastic protection member 30 of the flexible flat harness 10 is elastically protected at a predetermined position on the flexible printed circuit board 20, as shown in FIG. The fixing clip 50 which consists of the resin molding member etc. which were shape | molded separately from the member 30 may be provided and comprised.

  The fixing clip 50 is, for example, insert-molded when the elastic protection member 30 is formed. The rectangular base portion 51 is disposed inside the elastic protection member 30 and a part thereof is exposed on the surface, and the base portion. 51, a pressing piece 52 having elasticity for pressing an opening peripheral portion of a hole portion (not shown) provided in the fixing member, and a central portion of the pressing piece 52, and is inserted into the hole portion. And an umbrella-shaped tip 53.

  If the fixing clip 50 is provided on the elastic protective member 30 of the flexible flat harness 10 as described above, it is easy to attach the flexible printed circuit board 20 to the fixing member together with the elastic protective member 30 as in the case of the fixing clip 40. Since the presser piece 52 is attached and fixed in a state of pressing the opening peripheral edge of the hole while the tip 53 is caught in the hole of the fixing member, the mounting stability is improved even in a wet environment. be able to.

  FIG. 8 is a flowchart illustrating an example of a manufacturing process of the flexible flat harness 10 used for the above-described harness 1 with waterproof connector. FIG. 9 is a process explanatory diagram for explaining a part of the manufacturing process in the flowchart of FIG. As shown in FIG. 8, the flexible flat harness 10 used for the harness 1 with a waterproof connector is manufactured in the following procedures.

  First, the wiring 22 is formed on the insulating film 21 in advance to cover the coverlay 23, and the flexible printed board 20 formed in a desired shape, and the cooling formed in a shape having the same outer shape as the flexible printed board 20 The sheets 61 and 62 are arranged in a mold space provided with a space for molding the outer shape of the elastic protection member 30 (step S101).

  That is, as shown in FIG. 9A, in the above step S101, the upper mold 101 and the lower mold 102 are respectively separated in the space 103 formed by combining the upper mold 101 and the lower mold 102. The flexible printed circuit board 20 and the cooling sheets 61 and 62 are held between the flexible printed circuit board 20 and the cooling sheets 61 and 62 by the substrate clamping movable pins 110 and the sheet clamping movable pins 111 movably provided in the space 103. The substrate 20 is disposed in a state of floating in the air, and the cooling sheets 61 and 62 are disposed in a state of floating in the air at predetermined intervals from the surface of the flexible printed circuit board 20. In this case, holes are formed in the cooling sheets 61 and 62 at predetermined positions so that the sheet pinching movable pins 111 can be moved through.

  Next, an insulating resin material such as rubber or elastomer constituting the elastic protection member 30 is filled so as to fill the space 103 and contain the cooling sheets 61 and 62 (step S102), and flexible printing is performed by injection molding. The elastic protection member 30 including the cooling sheets 61 and 62 is formed on both sides of the substrate 20. Then, as shown in FIG. 9B, when the material filled in the space 103 is cured, the substrate clamping movable pins 110 and the sheet clamping movable pins that sandwich the flexible printed circuit board 20 and the cooling sheets 61 and 62, respectively. The pins 111 are moved in the outward direction of the space 103 indicated by arrows in the drawing. At this time, at the position where each movable pin 110, 111 is in the space 103, the elastic protection member 30 is not formed, and the holes 110a, 111a from which the surface of the flexible printed circuit board 20 is exposed are formed.

  In the state in which such holes 110a and 111a are formed, moisture can enter the flexible printed circuit board 20 when the flexible flat harness 10 is used in a wet environment. , 111 is moved, and the holes 110a, 111a in the space 103 are filled again with the material constituting the elastic protection member 30 to fill the holes 110a, 111a (step S103), as shown in FIG. 9C. As described above, the outer peripheral surface of the flexible printed circuit board 20 is completely covered with the elastic protection member 30. Thereby, the flexible flat harness 10 which has the flexible printed circuit board 20 and the cooling sheets 61 and 62 inside the elastic protective member 30 and has high heat resistance and waterproofness can be manufactured.

  The waterproof plugs 31 to 33 of the elastic protection member 30 formed in the vicinity of the terminal portion of the flexible printed circuit board 20 of the flexible flat harness 10 are the outer shapes of the waterproof plugs 31 to 33 in the upper mold 101 and the lower mold 102, respectively. If spaces (not shown) for molding the same are formed in the same manner, and the material constituting the elastic protection member 30 is filled in step S102, these spaces are also filled with the material. It is possible to integrally mold with the elastic protection member 30.

  In addition to manufacturing the flexible flat harness 10 by arranging the flexible printed circuit board 20 and the cooling sheets 61 and 62 in the space 103 using the movable pins 110 and 111 described above, the flexible flat harness 10 is manufactured as follows, for example. You may do it.

  FIG. 10 is a process explanatory diagram for explaining a part of the manufacturing process of the flexible flat harness according to the second embodiment of the present invention. That is, as shown in FIG. 10A, when the flexible printed circuit board 20 and the cooling sheets 61 and 62 are arranged in step S101, the space 103 formed by the upper mold 101 and the lower mold 102 is used. Further, the flexible printed boards 20A, 20B, and 20C and the cooling sheets 61A, 61B, 61C, 62A, 62B, and 62C that are fixed in advance to the fixed component 120 are arranged together with the fixed component 120 and float in the air in the space 103. Place in a state.

  And the material which comprises the elastic protection member 30 in the said step S102 is filled in the space 103, and the sheet | seat 61A-61C and 62A-62C for cooling are the sheet | seats 61A-61C and 62A-62C for cooling on the outer peripheral surface of flexible printed circuit boards 20A-20C. The fixed parts 120 are covered with the elastic protection member 30 in a state where they are arranged at a predetermined interval. Thereby, the flexible flat harness 10 which has flexible printed circuit board 20A-20C and the sheet | seats 61A-61C for cooling, and 62A-62C in the inside of the elastic protection member 30, and has high heat resistance and waterproofness can be manufactured similarly.

  If the flexible flat harness 10 is manufactured by the manufacturing process as described above, even when the waterproof connector-equipped harness 1 using the flexible flat harness 10 is used in a wet environment where it is exposed to water. The flexible printed circuit board 20 that is likely to absorb water and corrode is not covered and exposed by the elastic protection member 30 that encloses the cooling sheets 61 and 62, so that a high allowable current value and water resistance are maintained while maintaining the flexibility of the harness. It is possible to easily manufacture the flexible flat harness 10 that realizes high performance and excellent durability. Thereby, productivity of the flat harness 10 which has heat resistance and waterproofness can be improved.

  INDUSTRIAL APPLICATION This invention is useful for the technique which uses the flexible flat harness comprised by a flexible printed circuit board etc. in the to-be-watered environment exposed to water.

It is a perspective view showing the example of the harness with a waterproof connector using the flexible flat harness concerning a 1st embodiment of the present invention in the state where a part was disassembled. It is A-A 'sectional drawing of FIG. It is B-B 'sectional drawing of FIG. It is a perspective view which shows the whole structure of the flexible flat harness. It is sectional drawing for demonstrating the mode of the heat conduction of the flexible flat harness. It is explanatory drawing for magnifying and explaining a part of the flexible flat harness. It is explanatory drawing for magnifying and explaining a part of the flexible flat harness. It is a flowchart which shows the example of the manufacturing process of the flexible flat harness. It is process explanatory drawing for demonstrating a part of the manufacturing process. It is process explanatory drawing for demonstrating a part of manufacturing process of the flexible flat harness which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Harness with waterproof connector, 10 ... Flexible flat harness, 20 ... Flexible printed circuit board, 21 ... Insulating film, 22 ... Wiring, 23 ... Coverlay, 24 ... Locking hole, 30 ... Elastic protection member, 31-33 ... Waterproofing Stopper, 40, 50 ... clip for fixing, 61, 62 ... cooling sheet, 91-93 waterproof connector.

Claims (10)

A flexible printed circuit board having a conductor pattern formed on an insulating film;
An elastic protective member having a waterproof property covering an outer peripheral surface excluding an end of the flexible printed circuit board;
A flexible flat harness comprising: a cooling sheet disposed inside the elastic protection member on at least one surface side of the flexible printed circuit board.   The said elastic protective member comprises the waterproof plug of the shape which plugs up the insertion hole of the connector housing in which the edge part of this flexible printed circuit board is inserted in the edge part vicinity of the said flexible printed circuit board. Item 15. The flexible flat harness according to Item 1.   The flexible flat harness according to claim 2, wherein the waterproof plug has a locking claw for preventing removal that engages with a locking piece formed inside an insertion hole of the connector housing.   4. The flexible flat harness according to claim 2, wherein the flexible printed circuit board has a locking hole that engages with a lance formed in the connector housing at an end portion. 5.   The said elastic protection member is provided with the clip for fixation integrally formed for attaching and fixing the said flexible printed circuit board with respect to a fixing member in the predetermined position on the said flexible printed circuit board. The flexible flat harness according to any one of 4.   The elastic protection member includes a separate fixing clip that is insert-molded to attach and fix the flexible printed circuit board to a fixing member at a predetermined position on the flexible printed circuit board. Item 5. The flexible flat harness according to any one of Items 1 to 4.   The flexible flat harness according to claim 1, wherein the elastic protection member is made of rubber or elastomer. A method for producing a flexible flat harness comprising a planar conductor having flexibility,
A flexible printed circuit board having a conductor pattern formed on an insulating film is sandwiched by a movable pin from the thickness direction in the mold having a space for molding the outer shape of the flexible flat harness, and at least one of the flexible printed circuit boards The cooling sheet is sandwiched by movable pins from the thickness direction in the space on the surface side, and the flexible printed circuit board and the cooling sheet are disposed in a state of floating in the space;
The outer shape of the flexible flat harness is formed by filling the space with an insulating resin that forms a waterproof elastic protection member that covers the outer peripheral surface of the flexible printed circuit board while enclosing the cooling sheet when cured. Process,
And a step of pulling out the movable pin from the space and filling the hole with the insulating resin to fill the hole. A method for producing a flexible flat harness comprising a planar conductor having flexibility,
A flexible printed board having a conductor pattern formed on an insulating film is disposed in a state of floating in the space of a mold having a space for molding the outer shape of the flexible flat harness, and at least one of the flexible printed boards A step of temporarily fixing the cooling sheet on the surface side of each by a fixing component arranged in a floating state in the space;
Filling the space with an insulating resin that forms an elastic protective member that covers the outer peripheral surface of the flexible printed circuit board together with the fixed component while enclosing the cooling sheet when cured, the space of the flexible flat harness is And a step of forming an outer shape. A method of manufacturing a flexible flat harness, comprising:   The method for manufacturing a flexible flat harness according to claim 8, wherein the elastic protection member is made of rubber or elastomer.

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