JP2009231011A - Electric wire shielding structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric wire shielding structure of a simple structure, combining an electric wire and a flexible printed circuit in one body, and applying an electromagnetic shield to it to accomplish preferred grounding. <P>SOLUTION: In an electric wire shielding structure 10, an electric wire 11 runs along a flexible printed circuit 12 with its longitudinal direction approximately in parallel with a first direction of extension of the flexible printed circuit 12, and is secured together with the flexible printed circuit 12 to a conductive mounting member 80. The flexible printed circuit 12 has: a circuit portion 27; and an electromagnetic shielding portion 13. The circuit portion 27 runs in the first direction of extension and its circuit conductor 17 is coated with an insulating material. The electromagnetic shielding portion 13 runs in a body in the first direction of extension at the end of the circuit portion 27 in the second direction of extension which intersects with the fist direction of extension. The electromagnetic shielding portion 13 is secured to the mounting member 80 with the electric wire 11 clamped between the electromagnetic shielding portion and the mounting member. A shielded conductor 19 of the electromagnetic shielding portion 13 is electrically connected to the car body panel 80. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wire shield structure that electrically connects, for example, a control circuit in an automobile and a terminal electrical component, and the like, and more particularly, a wire and a flat circuit body (FPC (Flexible Printed Circuit) with a shield function. ), FFC (Flexible Flat Cable), and a flexible flat circuit body such as a ribbon electric wire).

  As an example of the wire harness fixing structure, as shown in FIG. 7, an extension portion 102 is formed in the width direction of the flat circuit body 101, and the optical fiber cable 103 is wound around the extension portion 102, and the end of the extension portion 102 is A device in which a portion is inserted into a slit 104 of a flat circuit body 101 is known (see, for example, Patent Document 1). According to this configuration, the flat circuit body 101 and the optical fiber cable can be fixed together.

JP 2002-182041 A (FIG. 4)

  In recent years, wire harnesses are often configured by combining a plurality of types of wiring materials suitable for applications. For example, a wire harness that is fixed by combining a flat circuit body for a small current circuit and an electric wire for a large current. May be configured.

  However, in the wire harness fixing structure disclosed in Patent Document 1, when a high-current electric wire is used instead of the optical fiber cable 103, it is necessary to electromagnetically shield the electric wire. In order to electromagnetically shield the electric wires, it is necessary to add a shield configuration separately or prepare an electromagnetically shielded electric wire in advance and then ground the conductor in the electromagnetic shield configuration. However, there are problems such as increasing complexity and cost.

  The present invention has been made in view of the above-described problems, and is an electric wire shield structure in which an electric wire and a flat circuit body are integrated, and can be grounded by applying an electromagnetic shield with a simple structure and is advantageous in terms of cost. Is to provide.

The above object of the present invention is achieved by the following configurations.
(1) An electric wire and a flexible flat circuit body are provided, and the electric wire is routed along the flat circuit body with its length direction being substantially parallel to the first extending direction of the flat circuit body. Is an electric wire shield structure fixed to a conductive attachment counterpart member together with the flat circuit body,
The flat circuit body includes a circuit portion extending in the first extending direction and having a circuit conductor covered with an insulating material, and the circuit portion in the second extending direction intersecting the first extending direction. An electromagnetic shield part integrally extending over the first extending direction at the end part and having a shield conductor covered with the insulating material;
The electromagnetic shield portion clamps the electric wire between the mounting counterpart member so that the electric wire is routed along the electromagnetic shield portion with its length direction being substantially parallel to the first extending direction. An electric wire shield structure, wherein the shield member is fixed to the attachment counterpart member in a state where the shield conductor and the shield conductor of the electromagnetic shield portion are electrically connected to the attachment counterpart member.

(2) The electric wire shield structure according to (1), wherein the electromagnetic shield portion is fixed to the attachment counterpart member with an adhesive at a predetermined position of a contact portion with the attachment counterpart member.

(3) The electromagnetic shield portion includes a clamp hole at a predetermined position of a contact portion with the attachment partner member, and is fixed to the attachment counterpart member by a clamp inserted into the clamp hole. The wire shield structure according to (1) above.

(4) In the electromagnetic shield portion, the shield conductor is partially exposed from the portion of the insulating material on the attachment counterpart member side, and the exposed portion of the shield conductor is attached to the attachment portion with a conductive adhesive. The wire shield structure according to (2) or (3), wherein the wire shield structure is fixed to and electrically connected to a mating member.

(5) The said (3) description characterized by the above-mentioned. The said clamp is formed with an electroconductive material and the said shield conductor is electrically connected to the said other party member through the said clamp in the said hole for clamps. Wire shield structure.

  According to the configuration of (1) above, the first extending direction that is the length direction of the flat circuit body is integrally extended to the end of the circuit portion in the second extending direction that intersects the first extending direction. The electromagnetic shield portion thus made can perform electromagnetic shielding of the electric wire and fix it to the attachment counterpart member by a simple operation of holding the electric wire between the attachment counterpart member in the length direction. As a result, an electromagnetic shield can be applied to the electric wire with a simple structure to perform fixing and grounding to the attachment member, and an advantageous electric wire shield structure can be obtained in terms of cost.

  According to the configuration of (2), since the electromagnetic shield portion is fixed to the attachment counterpart member by the adhesive, the electric wire can be fixed to the attachment counterpart member together with the flat circuit body with a simple configuration.

  According to the structure of said (3), since an electromagnetic shield part is fixed to an attachment other party member by a clamp, an electric wire can be fixed to an attachment other party member with a flat circuit body by simple structure.

  According to the configuration of (4) above, the conductor of the electromagnetic shield part is fixed and electrically connected to the mounting counterpart member with a conductive adhesive, so that large-scale equipment such as soldering and welding can be used. Without being necessary, the electromagnetic shield part can be reliably grounded by a simple operation.

  According to the configuration of (5) above, since the electromagnetic shield part is electrically connected to the mounting counterpart member via the conductive clamp, it is easy without requiring large-scale equipment such as soldering or welding. It is possible to reliably ground the electromagnetic shield part by simple work. Moreover, the attachment of the electric wire and the flat circuit body to the attachment counterpart member and the grounding of the electromagnetic shield part can be performed simultaneously.

  According to the present invention, an electric wire and a flexible flat circuit body are provided, and the electric wire extends along the flat circuit body with its length direction being substantially parallel to the first extending direction of the flat circuit body. In the wire shield structure that is routed and fixed to the conductive attachment counterpart member together with the flat circuit body, the electromagnetic shield can be applied with a simple structure to fix and ground the attachment counterpart member. A wire shield structure that is advantageous in terms of cost can be provided.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.

(First embodiment)
1 to 3 show a first embodiment of a wire shield structure according to the present invention, FIG. 1 is an exploded perspective view of the wire shield structure of the first embodiment according to the present invention, and FIG. 2 is a wire of FIG. FIG. 3 is a longitudinal sectional view of the electric wire shield structure of FIG. 2 after assembly in the shield structure.

  As shown in FIG. 1, the wire shield structure 10 according to the first embodiment of the present invention includes a plurality of wires 11 and a flat circuit body 12 integrally including a circuit portion 27 and an electromagnetic shield portion 13. The electric wire 11 and the flat circuit body 12 are fixed to a vehicle body panel 80 as an attachment counterpart member. The circuit unit 27 extends in the first extending direction, which is the longitudinal direction of the flat circuit body 12.

  The electric wires 11 are, for example, a plurality of seven wires, and the outer sides of the conductors 14 are respectively covered with the covering portions 15. The wires 11 are not themselves electromagnetically shielded.

  The circuit part 27 of the flat circuit body 12 is predetermined by bonding a circuit conductor 17 that is a copper foil to an outer cover 16 made of an insulating film such as polyethylene terephthalate (PET) or polyethylene naphthalate (PEN), and etching it. The circuit is formed. The formed circuit is covered with another jacket 16 made of an insulating film.

  The electromagnetic shield part 13 is integrally extended at the end of the circuit part 27 in the second extending direction that intersects the first extending direction of the flat circuit body 12. Similarly, a single electromagnetic shielding conductor 19 having conductivity is included. The electromagnetic shield conductor 19 is provided along the longitudinal direction (first extending direction) of the circuit conductor 17 of the circuit unit 27. The electromagnetic shielding conductor 19 is made of the same copper foil as the circuit conductor 17 and is formed by etching simultaneously with the circuit conductor 17 when the circuit of the flat circuit body 12 is formed. Therefore, the electromagnetic shield part can be easily formed without adding a special process when forming the electromagnetic shield part. The electromagnetic shielding conductor 19 is a copper foil similar to the circuit conductor 17, but may be a braided conductor shape.

  As shown in FIGS. 2 and 3, the electromagnetic shield portion 13 is placed on the electric wire 11 from the upper side where the electric wire 11 is placed on the vehicle body panel 80 which is an attachment counterpart member. At this time, the electromagnetic shield portion 13 is bent and deformed by being covered with the electric wire 11 and sandwiches the electric wire 11 with the vehicle body panel 80. For this reason, it is preferable that the electromagnetic shield conductor 19 has flexibility. However, when the thickness of the electric wire 11 to be sandwiched is thin, the electromagnetic shield conductor 19 may not have flexibility.

  And in the jacket 18 of the electromagnetic shield part 13, the jacket 18 under the one end part 20 which is a base part by the side of the circuit part 27 is partially excised, and the 1st connection part 22 of the conductor for electromagnetic shields is exposed. .

  Next, in the jacket 18, the exposed first connecting portion 22 is filled with the conductive adhesive 24, and the one end 20 on the flat circuit body 12 side and the other end on the anti-flat circuit body 12 side are filled. Insulating adhesives 25, 25 are applied to the part 21, and the electric shield 24 and the insulating adhesives 25, 25 apply electric wires to the electric wire placement surface 81 that the electromagnetic shield part 13 has on the vehicle body panel 80. It is fixed over 11 axial directions.

  Thereby, in a state where the electromagnetic shield part 13 sandwiches the electric wire 11 between the body panel 80 and the first connection part 22 of the electromagnetic shielding conductor 19 is electrically connected to the body panel 80, the electromagnetic shield The conductor 19 covers the periphery of the electric wire 11 together with the electric wire placement portion 81 of the vehicle body panel 80 in the axial direction to form an electromagnetic shield. At this time, similarly, the second connecting portion 23 of the electromagnetic shielding conductor 19 may be electrically connected to the vehicle body panel 80 by the conductive adhesive 24.

  Such an electric wire 10 is electrically connected between a control circuit (not shown) and a terminal electrical component (not shown) in the automobile via a connector (not shown), and the circuit conductor of the flat circuit body 12. A small-current electric signal is caused to flow in 17, and a small-current and large-current electric signal is caused to flow in the electric wire 11. At this time, since the electric wire 11 is surrounded in the axial direction by the electromagnetic shield conductor 19 of the electromagnetic shield part 13 together with the vehicle body panel 80, for example, disturbances such as electromagnetic noise do not enter the electric wire 11, Reliable signal transmission is performed.

  As described above, according to the electric wire shield structure of the first embodiment, the electromagnetic shield portion 13 that is integrally extended in the width direction (second extending direction) of the flat circuit body 12 is between the vehicle body panel 80 and the electromagnetic shield portion 13. And the electromagnetic shield conductor 19 is electrically connected to the vehicle body panel 80 so that the electromagnetic shield is provided integrally with the flat circuit body 12. The plurality of electric wires 11 can be electromagnetically shielded and fixed to the vehicle body panel 80 by a simple operation of covering the electric wires 11 with the portion 13. As a result, an electromagnetic shield can be applied to the electric wire 11 with a simple structure to fix the electric wire 11 to the vehicle body panel 80, and an electric wire shield structure advantageous in terms of cost can be obtained.

  Further, according to the wire shield structure of the first embodiment, the electromagnetic shield portion 13 is fixed to the vehicle body panel 80 around the electric wire 11 in the axial direction of the electric wire 11, so that the electric wire 11 extends in the axial direction. At the same time, it is shielded by the electromagnetic shielding conductor 19. In addition, since the electromagnetic shielding conductor 19 is electrically connected to the vehicle body panel 80 with the conductive adhesive 24, a ground circuit can be easily formed without requiring large-scale equipment such as soldering and welding. And can be fixed.

(Second Embodiment)
Next, with reference to FIGS. 4-6, the electric wire shield structure of 2nd Embodiment which concerns on this invention is demonstrated. 4 to 6 show a second embodiment of the wire shield structure according to the present invention. FIG. 4 is an exploded perspective view of the wire shield structure according to the second embodiment of the present invention, and FIG. FIG. 6 is a longitudinal sectional view of the wire shield structure of FIG. 5 after assembly in the wire shield structure. In the following second embodiment, the description of the components common to the first embodiment described above will be simplified or omitted by attaching the same reference numerals or equivalent reference numerals.

  As shown in FIG. 4, the wire shield structure 30 according to the second embodiment of the present invention includes a plurality of wires 11, a flat circuit body 12 integrally including an electromagnetic shield portion 13, and a clamp formed of a conductive material. (See FIG. 5) 31.

  A plurality of clamping holes 32 are formed in the electromagnetic shield part 13 along the longitudinal direction of the one end part 20 including the first connection part 22, and similarly, the other end part 21 including the second connection part 23 is formed. A plurality of clamping holes 33 are formed along the longitudinal direction.

  As shown in FIGS. 5 and 6, the electromagnetic shield portion 13 is placed on the electric wire 11 from above where the electric wire 11 is placed on the vehicle body panel 80. At this time, the electromagnetic shield portion 13 is bent and deformed by being covered with the electric wire 11 and sandwiches the electric wire 11 with the vehicle body panel 80. Moreover, although the one end part 20 and the other end part 21 are only put on the vehicle body panel 80, the jacket 18 may be adhere | attached with an adhesive agent as needed.

  Then, in the electromagnetic shield part 13 placed on the vehicle body panel 80, the conductive clamp 31 is inserted into the clamp holes 82 and 83 formed in the vehicle body panel 80 from above through the clamp holes 32 and 33. Worn. As a result, the first connection portion 22 and the second connection portion 23 are electrically connected to the vehicle body panel 80 via the conductive clamps 31, and at the same time, the electric wire 10 and the flat circuit body 12 are fixed to the vehicle body panel 80. The

  Since the wire shield structure according to the second embodiment has the same effects as the wire shield structure of the first embodiment, the description thereof is omitted. Furthermore, according to the second embodiment, the electromagnetic shield portion 13 is fixed to the vehicle body panel 80 by the conductive clamp 31 along the axial direction of the electric wire 11, so that the electric wire 11 is axially (first The electric wire 11 and the flat circuit body 12 are fixed by being shielded by the vehicle body panel 80 and the electromagnetic shielding conductor 19 over one extending direction). In addition, since the electromagnetic shielding conductor 19 is electrically connected to the vehicle body panel 80 via the conductive clamp 31, a ground circuit can be provided without requiring large-scale equipment such as soldering or welding. It can be easily formed.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

For example, in order to electrically connect the electromagnetic shielding conductor 19 to the vehicle body panel 80, the configuration is not limited to the above, and a part of the electromagnetic shielding conductor 19 and the vehicle body panel 80 are connected by a conductive member such as another electric wire. May be.
Further, the number of electric wires is not limited to the seven illustrated, and an appropriate number may be selected according to the number of energization circuits.

  Further, the flat circuit body may be formed by layering a plurality of circuit conductors in place of the illustrated single layer.

It is a disassembled perspective view of the electric wire to which the electric wire shield structure which is 1st Embodiment which concerns on this invention is applied. It is an external appearance perspective view after the assembly in the electric wire of FIG. It is a longitudinal cross-sectional view of the electric wire of FIG. It is a disassembled perspective view of the electric wire to which the electric wire shield structure which is 2nd Embodiment concerning this invention is applied. It is an external appearance perspective view after the assembly in the electric wire of FIG. It is a longitudinal cross-sectional view of the electric wire of FIG. It is sectional drawing of the conventional wire harness fixing structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electromagnetic shielding structure 11 Electric wire 12 Flat circuit body 13 Electromagnetic shielding part 19 Electromagnetic shielding conductor 24 Conductive adhesive 27 Circuit part 30 Electromagnetic shielding structure 31 Clamp 80 Body panel (attachment partner)

Claims (5)

An electric wire and a flexible flat circuit body, and the electric wire is routed along the flat circuit body with its length direction being substantially parallel to the first extending direction of the flat circuit body, A wire shield structure that is fixed to a conductive mounting mating member together with a flat circuit body,
The flat circuit body includes a circuit portion extending in the first extending direction and having a circuit conductor covered with an insulating material, and the circuit portion in the second extending direction intersecting the first extending direction. An electromagnetic shield part integrally extending over the first extending direction at the end part and having a shield conductor covered with the insulating material;
The electromagnetic shield portion clamps the electric wire between the mounting counterpart member so that the electric wire is routed along the electromagnetic shield portion with its length direction being substantially parallel to the first extending direction. An electric wire shield structure, wherein the shield member is fixed to the attachment counterpart member in a state where the shield conductor and the shield conductor of the electromagnetic shield portion are electrically connected to the attachment counterpart member.   The wire shield structure according to claim 1, wherein the electromagnetic shield portion is fixed to the attachment counterpart member with an adhesive at a predetermined position of a contact portion with the attachment counterpart member.   The electromagnetic shield portion includes a clamp hole at a predetermined position of a contact portion with the mounting partner member, and is fixed to the mounting partner member by a clamp inserted into the clamp hole. Item 1. A wire shield structure according to item 1.   In the electromagnetic shield portion, the shield conductor is partially exposed from the portion of the insulating material on the attachment counterpart member side, and the exposed portion of the shield conductor is applied to the attachment counterpart member by a conductive adhesive. The wire shield structure according to claim 2 or 3, wherein the wire shield structure is fixed and electrically connected.   4. The wire shield structure according to claim 3, wherein the clamp is made of a conductive material, and the shield conductor is electrically connected to the attachment counterpart member via the clamp at the clamp hole. .

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