JP5802010B2 - Wire harness shield structure - Google Patents

Description

  The present invention relates to a shield structure when a wire harness is introduced into a shield case.

  Conventionally, when the terminal portion of the electric wire is introduced while being shielded in the shield case, for example, as shown in FIGS. 13 to 15, the shield shell 120 is provided so as to surround the connector 110 provided at the terminal portion of the electric wire, The rear end of the shield shell 120 is covered with a double end of a braid 121 provided to cover the electric wire, and the covered portion is crimped and fixed with a ring 123. In this state, the front surface of the shield shell 120 The terminal 112 of the connector 110 introduced into the shield case 101 is connected to the terminal block 102 of the shield case 101. Further, at this time, it is usual to provide a sealing property between the shield case 101 and the shield shell 120 by interposing a seal packing 122 between the mating surfaces of the shield case 101 and the shield shell 120.

  Such a shielded structure is widely known, for example, in Patent Document 1.

JP 2002-281654 A

  By the way, in the conventional shield structure as shown in FIGS. 13-15, components, such as the shield shell 120, the braid 121, and the caulking ring 123, are needed for a shield, and the number of parts will increase. was there.

  In addition, since one braid 121 covers one end of the electric wire from the other end to the other end, when the middle of the electric wire is branched and a connector is attached to each end of the two branched electric wires, the braid There is also a problem that the configuration of 121 becomes complicated and difficult to cope with.

  Further, when the packing 122 is sandwiched between the mating surfaces of the shield case 101 and the shield shell 120, it is difficult to exert a sufficient shielding effect on the range of the thickness of the packing 122, and there is a possibility that a shield leakage point may occur.

  Further, at the place where the end of the braid 121 is put on the outer periphery of the rear end of the shield shell 120, the density of the braid 121 is reduced, so that the end of the braid 121 is folded and doubled so that the shield performance does not deteriorate. Although measures such as these have been taken, the processing for that purpose is troublesome, and the portion where the braid 121 is folded back twice swells excessively, and an extra space may be required in the periphery.

  The present invention has been made in view of the above-described circumstances. The object of the present invention is to reduce the number of parts and to easily cope with a case where there is a branch in the middle of an electric wire. An object of the present invention is to provide a shield structure for a wire harness that can ensure performance and shield performance, and that can eliminate problems in the case of using a braid.

The above object of the present invention can be achieved by the following constitution.
(1) In the shield structure of the wire harness introduced while shielding the electric wire constituting the wire harness in the shield wall of the electric device,
The electric wire is laminated in a state where a plurality of strip-shaped conductors are insulated from each other, and is covered with a resin mold portion as an integrally formed insulating resin layer so as to cover the outer peripheral surface of the resin mold portion. A shield layer by resin plating is coated over a predetermined range in the length direction of the conductor,
The resin mold part that integrally holds the plurality of conductors has a wire insertion hole that can be inserted while sealing the periphery of the resin mold part, and is made of a conductive rubber that is attached in close contact with the shield wall. Comprising a sealing member,
The terminal portion of the conductor held by the resin mold portion up to a position where the shield layer is formed by the resin plating is inserted into the shield wall through the electric wire insertion hole of the seal member, thereby the seal. A wire harness characterized in that an inner periphery of a wire insertion hole of a member is in close contact with the shield layer covering the outer peripheral surface of the resin mold portion, and the shield layer and the conductive rubber seal member are electrically connected to each other Shield structure.

  (2) Secure the non-resin plating part excluding the resin plating over a predetermined range from the end of the conductor at the end of the electric wire introduced into the shield wall, and at the end of the non-resin plating part, The shield structure for a wire harness according to (1) above, wherein a conductor exposed portion excluding the insulating resin layer is provided, and a connection portion is provided in the conductor exposed portion.

  According to the shield structure of the wire harness having the configuration (1), the electric wire portion exposed to the outside of the shield wall is shielded by resin plating instead of the braid, and the introduction portion of the electric wire into the shield wall is made of conductive rubber. Since the shield member is shielded by a manufactured seal member, there is no need for a braid, a shield shell, or a caulking ring, and the number of parts can be reduced.

  In addition, since the sealing member itself has conductivity, unlike the case of using the conventional packing, there is no possibility of occurrence of a shield leakage portion, and sufficiently high shielding performance and sealing performance can be exhibited.

  Moreover, since resin plating is adopted instead of the braid, it is possible to easily cope with a case where there is a branch in the middle of the electric wire.

  Furthermore, since a braid is not used, there is no problem with using a braid, that is, no extra processing such as double folding or extra space is required, and a compact wire harness and can do.

In addition, according to the shield structure of the wire harness having the configuration of (1) , a plurality of strip plate conductors are laminated in a state of being insulated from each other, covered with the resin mold portion, and the outer peripheral surface of the resin mold portion is covered. Since the shield layer is formed by resin plating so as to cover it, it is possible to shield it integrally while insulating a plurality of conductors.

Moreover, since the shield layer can be conducted to the seal member by inserting the resin mold part into the electric wire insertion hole of the seal member made of conductive rubber, the seal member can be sealed by attaching the seal member to the shield case. Both function and shield function can be demonstrated at the same time.
According to the shield structure of the wire harness configured as described in (2) above, a non-resin plated portion is secured at the end portion of the electric wire, and a conductor exposed portion excluding the insulating resin layer is provided at the end of the non-resin plated portion. And since the connection part was provided in the conductor exposed part, the resin plating layer which is a shield layer, and the connection part connected to a conductor can be reliably maintained in a non-conductive state.

  According to the present invention, it is possible to reduce the number of parts while securing sufficient sealing performance and shielding performance by employing a shield layer formed by resin plating on the outer periphery of the electric wire and a sealing member made of conductive rubber. Further, it is possible to easily cope with a case where there is a branch in the middle of the electric wire, and further, it is possible to eliminate troublesomeness in processing and space in the case of using a braid.

It is explanatory drawing of the shield structure of the wire harness of the reference example of this invention, (a) is a disassembled perspective view, (b) is a perspective view which shows an assembly state. It is sectional drawing of the part which introduce | transduced the edge part of the wire harness of the reference example in the shield case. It is a perspective view of the shield structure of the wire harness of 1st Embodiment of this invention. It is sectional drawing of the part which introduce | transduced the edge part of the wire harness of the 1st Embodiment in the shield case. It is a perspective view of the shield structure of the wire harness of 2nd Embodiment of this invention. It is sectional drawing of the part which introduced the edge part of the wire harness of the 2nd Embodiment in the shield case. It is a disassembled perspective view of the shield part which shows the assembly process of 2nd Embodiment . FIG. 8A is a perspective view of the shield portion viewed from above, and FIG. 8B is a perspective view of the shield portion viewed from below. FIGS. 9A and 9B are diagrams illustrating the next step of FIG. 8, in which FIG. 9A is a perspective view of the shield portion viewed from above, and FIG. 9B is a plan view of the shield portion viewed from below. It is the perspective view which looked at the shield part which shows the next process of FIG. 9 from the top. It is the perspective view which looked at the shield part which shows the next process of FIG. 10 from the top. It is the perspective view which looked at the shield part which shows the next process of FIG. 11 from the top. It is a perspective view before the assembly of the shield structure of the conventional wire harness. It is a perspective view of the assembly state of the shield structure. It is the perspective view seen from another direction of the assembly state of the shield structure.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[ Reference example ]
FIG. 1 is an explanatory view of a shield structure of a wire harness of a reference example , (a) is an exploded perspective view, (b) is a perspective view showing an assembled state, and FIG. 2 introduces an end of the wire harness into a shield case. It is sectional drawing of a part.

  This shield structure is a structure when the electric wire 1 constituting the wire harness W is introduced into the interior 51 of the shield wall 50 of the electric device through the insertion hole 52 formed in the shield wall 50 while shielding and sealing. First, in the electric wire 1, the insulating resin layer 3 is formed on the outer periphery of the strip-shaped conductor 2, and the shield layer 4 by resin plating is formed in a predetermined length direction of the conductor 2 so as to cover the outer peripheral surface of the insulating resin layer 3. A coated structure is formed over a range (indicated by H3 in the figure).

In this reference example , three strip-shaped electric wires 3 are arranged side by side in the width direction, and are arranged along the same route in parallel with each other. A conductive rubber seal member 5 and a metal shield shell 7 integrated with the seal member 5 when the seal member 5 is molded are disposed at both ends of the three electric wires 1.

  The shield shell 7 has an oval ring shape, and the inner peripheral flange 7a is embedded in the rubber constituting the seal member 5, so that it is integrated with the seal member 5 and has a mounting hole. The outer peripheral flange portion 7 b is exposed to the outside of the rubber constituting the seal member 5. Further, the seal member 5 disposed on the inner peripheral portion of the shield shell 7 is in a state of being in close contact with the shield wall 50 by screwing the shield shell 7 to the shield wall 50 of the electric device using an attachment hole. It is supposed to be retained.

  This seal member 5 is an oval thick plate body, and has three electric wire insertion holes 5a that can be inserted through the electric wires 1 while sealing the periphery of the electric wires 1 through the thickness direction. ing. In this case, since the cross section of the strip-shaped electric wire 1 is rectangular, the three electric wire insertion holes 5a are each formed as a rectangular through hole. Further, in order to improve the adhesion to the shield wall 50, an annular seal lip 5 b is provided on the adhesion surface to the shield wall 50.

  And the terminal part of each electric wire 1 is each inserted in the electric wire insertion hole 5a of the sealing member 5 to the position where the shield layer 4 by resin plating exists, and the inner peripheral lip 5c of the electric wire insertion hole 5a of the sealing member 5 is The wire 1 is in close contact with the outer surface of the shield layer 4. Thereby, the shield layer 4 and the conductive rubber seal member 5 are electrically connected to each other.

  Therefore, by attaching the shield shell 7 to the shield wall 50 of the electric device and bringing the seal member 5 into close contact with the shield wall 50, it is possible to waterproof seal between the electric wire 1 and the shield wall 50, and at the same time, the seal member 5. Through or through the seal member 5 and the shield shell 7, the shield layer 4 on the outer periphery of the electric wire 1 can be electrically connected to the shield wall 50 of the electric device and grounded.

  Moreover, the non-resin plating part H4 which excluded resin plating over the predetermined range from the edge part of the conductor 2 of the electric wire 1 is ensured in the terminal part of the electric wire 1 introduced in the shield wall 50 in this way, A conductor exposed portion H1 excluding the insulating resin layer 3 is provided at the end of the non-resin plated portion 4, and the conductor exposed portion H1 serves as a connection portion 8 having a fastening hole. In addition, the range shown by H2 in the figure is a portion where the insulating resin layer 3 is exposed.

  Thus, when the shield layer 4 by resin plating is formed on the outer peripheral surface of the electric wire 1 in the cable exposed section (section exposed to the outside of the shield wall 50), unlike the case where a braid is provided for the shield, it is simply unnecessary. The shield effect can be given to the electric wire without taking a large space and thickness. Moreover, since the conductive rubber seal member 7 is interposed between the shield layer 4 of the electric wire 1 and the shield wall 50 of the electric device, the electric wire 1 is inserted into the electric wire insertion hole 7a of the seal member 7, and the seal member 7 is The shield layer 4 and the shield wall 50 can be easily conducted simply by being in close contact with the shield wall 50. Therefore, no braiding or caulking ring is required, and the number of parts can be reduced.

Further, in this reference example , the shield shell 7 is used. However, in order to secure the shielding property, it is sufficient if the seal member 5 made of conductive rubber is used, and the shield shell 7 includes the seal member 5 and the shield wall 50. It only has to fulfill the function of closely contacting the Therefore, it is not always necessary to have shielding performance, and it can be made of non-metal. In that sense, the shield shell 7 that performs the shield function can be omitted.

  Moreover, since the sealing member 5 itself has conductivity, unlike the case of using the conventional packing, there is no possibility of occurrence of a shield leakage portion, and sufficiently high shielding performance and sealing performance can be exhibited. Moreover, since the shield layer 4 by resin plating is employed instead of the braid, even if there is a branch in the middle of the electric wire 1, easy handling is possible. That is, the conductor 2 is previously formed along the routing path, the insulating resin layer 3 is formed, and resin plating is performed thereon. Therefore, it is not influenced by the wiring form of the electric wire 1, and the freedom degree of a layout increases. For example, a wire harness having a shield function with one connector on one end and a plurality of connectors on the other end can be easily produced.

In addition, since the braid is not used in the shield structure of this reference example , there is a problem when using the braid, that is, extra processing such as double folding is required or extra space is required. There is no, and it can be set as a compact wire harness.

  In addition, the shield layer 4 formed by resin plating only comes into contact with the inner periphery of the electric wire insertion hole 5a of the conductive rubber seal member 5, and there is no fear of destroying the plating layer as in the case of caulking. The terminal shielding performance is not impaired.

  Moreover, the non-resin plating part H4 is ensured in the terminal part of the electric wire 1, and the conductor exposed part H1 excluding the insulating resin layer 3 is provided at the end of the non-resin plated part H4. Since it is the connection part 8 which has a fastening hole, the resin plating layer which is the shield layer 4, and the connection part 8 of the conductor 2 can be reliably maintained in a non-conductive state.

In addition, although the case where the shield shell 7 and the seal member 5 were integrally formed by insert molding was shown in the above reference example , both may be combined later after being molded separately.

[ First Embodiment ]
FIG. 3 is a perspective view of the shield structure of the wire harness according to the first embodiment of the present invention, and FIG. 4 is a cross-sectional view of a portion where the end of the wire harness is introduced into the shield case.

  The electric wire 11 constituting the wire harness W2 of this embodiment is formed integrally with three strip-shaped conductors 2 in a bundle in which the conductors 2 are insulated from each other with a gap in the thickness direction. The structure covered with the resin mold part 13 as an insulating resin layer is comprised. And the shield layer 14 by resin plating is coated over the predetermined range of the length direction of the conductor 2 so that the outer peripheral surface of the resin mold part 13 may be covered.

  In addition, a conductive rubber seal member 15 and a metal shield shell 17 that holds the seal member 15 are disposed at both ends of the electric wire 11. The shield shell 17 is ring-shaped, and the inner peripheral flange portion 17a is fitted into the outer peripheral groove 15e of the seal member 15 so that the shield shell 17 is integrally coupled with the seal member 15. It is exposed outside the seal member 15. Further, the seal member 15 disposed on the inner peripheral portion of the shield shell 17 is in a state of being in close contact with the shield wall 50 by screwing the shield shell 17 to the shield wall 50 of the electric device using an attachment hole. It is supposed to be retained.

  This seal member 15 is a thick plate body, and has an electric wire insertion hole 15a that can be inserted through the electric wire 11 while sealing the periphery of the electric wire 11 through the thickness member. In this case, the wire insertion hole 15 a is formed in a shape corresponding to the cross-sectional shape of the resin mold portion 13. Further, in order to improve the adhesion to the shield wall 50, an annular seal lip 15b is provided on the adhesion surface to the shield wall 50.

  And the terminal part of the electric wire 11 in which the resin mold part 13 was provided is inserted in the electric wire insertion hole 15a of the sealing member 15 to the position where the shield layer 14 by resin plating exists, and the electric wire insertion hole 15a of the sealing member 15 is inserted. The inner peripheral lip 15 c is in close contact with the outer surface of the shield layer 14 of the electric wire 11. Thereby, the shield layer 14 and the conductive rubber seal member 15 are electrically connected to each other.

  Therefore, by attaching the shield shell 17 to the shield wall 50 of the electric device and bringing the seal member 15 into close contact with the shield wall 50, it is possible to waterproof seal between the electric wire 11 and the shield wall 50, and at the same time, the seal member 15 The shield layer 14 on the outer periphery of the electric wire 11 can be electrically connected to the shield wall 50 of the electric device through the seal member 15 and the shield shell 17 to be grounded.

  Moreover, the non-resin plating part H4 which excluded resin plating over the predetermined range from the edge part of the conductor 2 of the electric wire 11 is ensured in the terminal part of the electric wire 11 introduced in the shield wall 50 in this way, A conductor exposed portion H1 excluding the resin mold portion (insulating resin layer) 13 is provided at the end of the non-resin plated portion 4, and the conductor exposed portion H1 serves as a connection portion 8 having a fastening hole. The connecting portions 8 are arranged so as to be shifted from each other so that they do not overlap in the thickness direction for each of the three conductors 2, and can be bolted to the terminals on the electric equipment side. In addition, the range shown by H2 in a figure is a part which the resin mold part 13 exposed.

  In the case of the shield structure of this embodiment, the following effects can be obtained in addition to the effects of the shield structure of the first embodiment described above. That is, since the plurality of conductors 2 are covered with the resin mold portion 13 while being insulated from each other, and the shield layer 14 is formed by resin plating so as to cover the outer peripheral surface of the resin mold portion 13, the plurality of conductors 2 Can be shielded integrally while insulating. Further, since the resin mold portion 13 is inserted into the electric wire insertion hole 15 a of the conductive rubber seal member 15, the shield layer 14 can be electrically connected to the seal member 15, so that the seal member 15 is brought into close contact with the shield wall 50. By mounting in this manner, both the sealing function and the shielding function can be exhibited simultaneously.

[ Second Embodiment ]
FIG. 5 is a perspective view of a shield structure for a wire harness according to a second embodiment of the present invention, and FIG. 6 is a cross-sectional view of a portion where an end portion of the wire harness is introduced into a shield case.

The electric wire 11 constituting the wire harness W3 of this embodiment has substantially the same structure as that of the first embodiment . The difference is that two convex portions 13c and 13e constituting the fitting groove 13d are provided on the outer periphery of the resin mold portion 13 at the terminal portion of the electric wire 11, and a ring-shaped sealing member is provided in the fitting groove 13d. That is, the inner periphery of 25 is fitted. The seal member 25 is electrically connected to the shield layer 14 on the surfaces of the two convex portions 13c and 13e.

  Further, the inner peripheral flange portion 27a of the ring-shaped shield shell 27 having the outer peripheral flange portion 27b is engaged with the resin mold portion 13 at an appropriate location, and fixes the shield shell 27 to the shield wall 50 of the electric device. Thus, the seal member 25 can be brought into close contact with the shield wall 50 while being sealed.

Other configurations are the same as those in the first embodiment , and the same effects can be obtained.

7 to 12 are assembly process diagrams of the shield portion of the second embodiment . The electric wire 11 is not shown.
First, as shown in FIGS. 7 to 9, the resin mold portion 13 to which the seal member 25 is attached is inserted into the insertion hole 27 d of the shell 27. At this time, the seal member 25 is completely passed through the insertion hole 27. Next, as shown in FIG. 10, the resin mold portion 13 is slightly returned to the insertion source direction, and the flange portion 13 g provided on the resin mold portion 13 is in pressure contact with the entrance portion of the insertion hole 27 d of the shell 27, and the shaft core is aligned. Allow relative rotation to the center. Next, as shown in FIGS. 11 and 12, the shell 27 is rotated 90 degrees to engage the concave portion 27c provided in the shell 27 with the convex portion 13f provided in the flange portion 13g. In this way, the shell 27 is attached to the resin mold portion 13.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, 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, the electric wire to be connected may not be a flat electric wire (flat cable) as in the above embodiment, but may be a general electric wire having a circular cross section.

  In addition, the connecting portion may be a member in which a separate connecting terminal is connected and fixed to the end of the conductor by caulking or welding.

W1-W3 Wire harness 1, 11 Electric wire 2 Conductor 3 Insulating resin layer 4 Shield layer 5 Seal member 5a Wire insertion hole 8 Connection portion 13 Resin mold portion 15 Seal member 25 Seal member 50 Shield wall H1 Conductor exposed range (conductor exposed portion)
H3 resin plating range (shield layer)
H4 non-resin plated part

Claims (2)

In the shield structure of the wire harness introduced while shielding the electric wire constituting the wire harness in the shield wall of the electric equipment,
The electric wire is laminated in a state where a plurality of strip-shaped conductors are insulated from each other, and is covered with a resin mold portion as an integrally formed insulating resin layer so as to cover the outer peripheral surface of the resin mold portion. A shield layer by resin plating is coated over a predetermined range in the length direction of the conductor,
The resin mold part that integrally holds the plurality of conductors has a wire insertion hole that can be inserted while sealing the periphery of the resin mold part, and is made of a conductive rubber that is attached in close contact with the shield wall. Comprising a sealing member,
The terminal portion of the conductor held by the resin mold portion up to a position where the shield layer is formed by the resin plating is inserted into the shield wall through the electric wire insertion hole of the seal member, thereby the seal. A wire harness characterized in that an inner periphery of a wire insertion hole of a member is in close contact with the shield layer covering the outer peripheral surface of the resin mold portion, and the shield layer and the conductive rubber seal member are electrically connected to each other Shield structure. A non-resin-plated portion that excludes the resin plating over a predetermined range from the end portion of the conductor is secured at the end portion of the electric wire introduced into the shield wall, and the insulating resin is provided at the end portion of the non-resin-plated portion. 2. The shield structure for a wire harness according to claim 1, wherein a conductor exposed portion excluding the layer is provided, and a connecting portion is provided in the conductor exposed portion .

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