JP5772386B2 - Shield member and shield conductor - Google Patents

Description

  The present invention relates to a shield member and a shield conductor.

  Conventionally, the thing of patent document 1 is known as a shield conductor formed by surrounding the circumference of an electric wire with a shield member. A connector is attached to the end of the shield conductor. The shield conductor includes an electric wire and a shield member having a cylindrical portion through which the electric wire is inserted. The shield member includes a metal bracket (first shield member) through which the electric wire is inserted, a braided wire (second shield member) through which the electric wire is inserted and the terminal portion is externally fitted to the cylindrical portion, and a bracket cylinder And caulking for fixing the braided wire externally fitted to the portion by caulking from the outer peripheral side. The bracket and the braided wire are electrically connected to each other by caulking from the outside with caulking while the braided wire is fitted on the outer periphery of the cylindrical portion. Thereby, the electric wire inserted in the bracket and the braided wire is electromagnetically shielded.

JP 2005-276570 A

  In order to improve the shielding performance of the shield conductor, it has been considered to firmly connect the tubular portion and the braided wire. For this purpose, it has been considered desirable to suppress the cylindrical portion from being bent and deformed in the diameter reducing direction when the caulking ring is caulked to the cylindrical portion.

  Therefore, as shown in FIG. 13, a protruding edge portion protruding radially outward of the cylindrical portion 135 at the end portion on the opposite side to the end portion of the cylindrical portion 135 on which the braided wire (not shown) is fitted. It has been considered that 136 is formed over the entire circumference of the cylindrical portion 135. As a result, the caulking ring 118 is caulked to the cylindrical portion 135, so that even if a force is applied from the caulking ring 118 to the cylindrical portion 135 in the direction indicated by the arrow X, the protruding edge formed on the cylindrical portion 135 is formed. It is considered that this force is received by 136 and the cylindrical portion 135 is restrained from being bent and deformed radially inward.

  However, even if the protruding edge 136 is formed over the entire circumference of the cylindrical portion 135, the cylindrical portion 135 is still inwardly in the radial direction (in the direction indicated by the arrow Y) in the vicinity of the approximate center in the major axis direction of the cylindrical portion 135. As a result, the braided wire could not be sufficiently tightened between the cylindrical portion 135 and the caulking ring 118.

  The reason is estimated as follows. When the braided wire is caulked with the caulking ring 118 to the tubular portion 135, a force that reduces the diameter is applied to the tubular portion 135, and the force is also received by the protruding edge 136 that continues to the tubular portion 135. The strong diameter-reducing force applied to both end portions (curved wall portions) on the small-diameter side of the cylindrical portion 135 is such that the projecting edge 136 is continuous over the entire circumference of the cylindrical portion 135. Other parts (a pair of opposing walls located between the curved walls) are also subjected to a force that is pressed from the protruding edge 136, and eventually a strong force is also applied to the opposing wall of the cylindrical part 135, and the cylindrical part 135 is bent and deformed inward in the radial direction (the direction indicated by the arrow Y).

  This invention is completed based on the above situations, Comprising: It aims at providing the shield member and shield conductor by which the connection failure of the 1st shield member and the 2nd shield member was suppressed. .

  The present invention is a metal first shield member into which an electric wire is inserted into a flat cylindrical portion composed of a pair of opposed walls facing each other and a pair of curved walls connected between the pair of opposed walls, A second shield member that is formed of a braided wire through which the electric wire is inserted and is fitted outside in a state where the terminal portion covers one end of the cylindrical portion; and the braided wire that is externally fitted into the cylindrical portion A shield member including a caulking ring that is caulked and fixed, and at least the pair of curved walls of the other end portion of the cylindrical portion protrudes outward in the thickness direction of the curved walls. Protruding edges are formed, and the pair of opposing walls are formed with flexible regions that can be bent and deformed outward in the radial direction of the cylindrical portion by not forming the protruding edges.

  Further, the present invention is a metal product in which the electric wire is inserted into a flat cylindrical portion including an electric wire, a pair of opposing walls facing each other, and a pair of curved walls connecting the pair of opposing walls. A first shield member, a second shield member comprising a braided wire through which the electric wire is inserted, and a terminal portion fitted from one end side of the tube portion, and the braid fitted to the tube portion. And a caulking ring for caulking and fixing the wire from the outer peripheral side, and at least the pair of curved walls of the other end portion of the cylindrical portion has a thickness direction of the curved walls. Protruding edge portions projecting outward are formed, and the pair of opposing walls are formed with a flexible region that can be bent and deformed radially outward of the cylindrical portion by not forming the projecting edge portions. ing.

  According to the present invention, the second shield member can be securely sandwiched between the caulking ring and the flexible region by bending and deforming the flexible region radially outward of the cylindrical portion. Thereby, the electrical connection between the first shield member and the second shield member can be ensured. Further, the tensile strength between the first shield member and the second shield member can be improved.

  As embodiments of the present invention, the following embodiments are preferable. The pair of opposing walls are preferably curved in a convex shape with respect to the radially outer side of the cylindrical portion.

  According to the above aspect, when the caulking is caulked, the pair of opposing walls are surely bent and deformed outward in the radial direction of the cylindrical portion. Thereby, the electrical connection between the first shield member and the second shield member and the tensile strength can be reliably improved.

The pair of opposing walls protrude outward in the thickness direction of the opposing walls, and a plurality of protrusions spaced apart from the protruding edges are formed at intervals, and the plurality of protrusions It is preferable that a plurality of the flexible regions are formed between adjacent protrusions, and the protrusions are in contact with a case of the device.

  According to said aspect, since a contact area of a case and a 1st shield member increases because a protrusion part contacts with the case of an apparatus, shield performance can be improved. Further, since the projecting portion is separated from the projecting edge portion, the force for expanding and deforming the cylindrical portion is transmitted from the projecting portion to the projecting edge portion and is not received by the projecting edge portion. As a result, the cylindrical portion can be easily expanded in diameter.

  According to the present invention, poor connection between the first shield member and the second shield member can be suppressed.

The side view which shows the connector which concerns on Embodiment 1. Side sectional view showing the connector Top view showing bracket Rear view showing bracket Partially omitted rear view showing the caulking ring attached to the bracket Side sectional view occupying a state where the bracket and the caulking ring are separated from the connector housing The top view which shows the bracket which concerns on Embodiment 2. The rear view which shows the bracket which concerns on Embodiment 2. The top view which shows the bracket which concerns on Embodiment 3. The rear view which shows the bracket which concerns on Embodiment 3. The top view which shows the bracket which concerns on Embodiment 4. The rear view which shows the bracket which concerns on Embodiment 4. Partially omitted rear view showing a state in which the caulking ring is attached to the bracket according to the prior art

<Embodiment 1>
A first embodiment in which a shield member 10 and a shield conductor 11 according to the present invention are applied to a connector 12 will be described with reference to FIGS. 1 to 6. The shield conductor 11 is disposed as a power wire for an inverter, a motor (generator), a battery, or the like (not shown) in a vehicle such as a hybrid car or an electric car (not shown). The connector 12 according to this embodiment is attached to a terminal of a shield conductor 11 disposed between the inverter and the motor, and is assembled to an inverter case (not shown). In the following description, the vertical direction will be described with reference to FIG. 1, and the front-back direction will be described with the left side in FIG. 1 as the front and the right side as the rear.

(Connector 12)
The connector 12 accommodates a plurality of terminal fittings 15 connected to ends of a plurality of electric wires 14 inside a connector housing 13 made of synthetic resin. The shield conductor 11 includes a plurality of electric wires 14 and a shield member 10 that electromagnetically shields the electric wires 14. The shield member 10 includes a metal bracket 16 (corresponding to a first shield member) through which the electric wire 14 is inserted, and a braided wire 17 (second shield member) that collectively surrounds the electric wire 14 through the insertion of the electric wire 14. And a caulking ring 18 that holds the end of the braided wire 17 by crimping with the bracket 16.

  The electric wire 14 is a covered electric wire 14 in which the periphery of the core wire 19 is covered with an insulating coating 20. The core wire 19 is a stranded wire formed by twisting a large number of metal strands.

  As shown in FIG. 2, the metal terminal fitting 15 is caulked to a device connection portion 21 that can be connected to a counterpart terminal (not shown) on the inverter side and a core wire 19 exposed at the end of the electric wire 14. It is comprised from the barrel part 22. FIG. The device connection portion 21 has a cantilever plate shape, and a through-hole 23 into which a bolt (not shown) for fixing to a mating terminal can be inserted is formed at the tip portion. A molded portion 24 is formed on the outside of the terminal fitting 15 and the electric wire 14 by molding with a synthetic resin. The above-described device connection portion 21 protrudes outward from the mold portion 24.

  The connector housing 13 is a synthetic resin member that holds the terminal fitting 15 and the electric wire 14, and accommodates the terminal fitting 15, the electric wire 14, and the molded portion 24.

  A seal ring 25 is attached to the outer surface of the connector housing 13 so as to be interposed between the case of the device and seal between the connector housing 13 and the case. Further, a rubber plug 26 is fitted on the insulating coating 20 of the electric wire 14, and the rubber plug 26 is in close contact with the inner surface of the connector housing 13 so as to seal between the electric wire 14 and the connector housing 13. It has become. A rubber plug holding member 27 made of a synthetic resin that restricts the rubber plug 26 from coming out of the connector housing 13 is attached to the connector housing 13 behind the rubber plug 26.

  A stepped portion 28 projecting outward in a stepped shape is formed on the front end portion of the mold portion 24 over the entire circumference, and the front end portion of the connector housing 13 is abutted against the stepped portion 28 from the rear. On the upper and lower sides of the mold portion 24, locking projections 29 that protrude outward in the radial direction of the electric wire 14 are respectively provided.

  The connector housing 13 as a whole has a substantially cylindrical shape opened in the front-rear direction. The connector housing 13 is assembled from the rear along the axial direction of the electric wire 14 with respect to the mold portion 24 and the electric wire 14 can be inserted into the inner portion. On the inner surface of the connector housing 13, a locking recess 30 that is locked to the locking projection 29 of the mold portion 24 is provided.

  A seal ring 25 is attached to the outer peripheral surface on the front end side of the connector housing 13. A mounting recess 32 in which the rubber plug 26 and the rubber plug holding member 27 can be mounted is provided on the inner peripheral surface of the rear end portion of the connector housing 13. On the rubber plug holding member 27, locking claws 34 that are locked in the locking holes 33 of the connector housing 13 to prevent the rubber plug 26 from coming off are provided in a protruding manner in the vertical direction.

(Shield member 10)
The metal bracket 16 can be externally fitted to the connector housing 13 from the rear, and as shown in FIGS. 3 and 4, a flat oval cylindrical portion 35 elongated in the left-right direction, and a cylindrical portion A projecting edge portion 36 projecting outward in the radial direction of the cylindrical portion 35 from both left and right end portions of the cylindrical portion 35.

  The cylindrical portion 35 includes a pair of opposing walls 37 and 37 that are arranged to face each other vertically, and a pair of curved walls 38 that are connected between the pair of opposing walls 37 and 37 on both sides of the pair of opposing walls 37 and 37. , 38.

  The pair of opposing walls 37, 37 extend substantially horizontally in the left-right direction with a substantially constant interval. If it demonstrates in detail, a pair of opposing walls 37 and 37 will be slightly curved and formed in the radial direction outer side of the cylinder part 35. As shown in FIG.

  The curved wall 38 has a semi-cylindrical shape (semi-circular shape), and is curved in a U shape with a substantially constant curvature so as to swell in the left-right direction.

  The protruding edge portion 36 is formed to protrude outward in the thickness direction of the curved wall 38 in the region where the pair of curved walls 38, 38 are formed in the front end portion of the cylindrical portion 35. The protruding edge 36 is attached to the case of the device. A circular attachment hole 39 is formed through the protruding edge 36, and the protruding edge 36 and the case are fixed integrally by inserting a bolt or the like into the screw hole of the case.

  The braided wire 17 is configured by braiding a plurality of fine metal wires in which tin plating is applied to copper. The braided wire 17 is formed in a horizontally long cylindrical shape that can collectively surround the plurality of electric wires 14, and extends along the axial direction of the electric wires 14. The braided wire 17 is externally fitted to the tubular portion 35 of the bracket 16 from the rear end side of the tubular portion 35. The rear end portion of the cylindrical portion 35 is covered with the braided wire 17.

  The caulking ring 18 is made of metal and is made of, for example, aluminum or an aluminum alloy. The caulking ring 18 has a substantially cylindrical shape. Before the caulking, the caulking ring 18 has an oval shape slightly larger than the cylindrical portion 35 of the bracket 16, and after being caulked using a jig or the like, As shown in FIG. 5, the part with the excessive outer diameter is in close contact with the entire outer periphery and protrudes horizontally to the left and right as a folded portion 40 that overlaps with each other. The folded portion 40 is formed at a position corresponding to the curved wall 38 of the cylindrical portion 35.

  As shown in FIG. 5, the protruding edge portion 36 is not formed in the region where the pair of opposing walls 37, 37 are formed in the cylindrical portion 35. Thereby, the area | region in which the protrusion edge part 36 is not formed among the opposing walls 37 is made into the flexible area | region which can bend and deform | transform about the radial direction outer side (direction shown by the arrow A in FIG. 5) of the cylinder part 35. . In FIG. 5, configurations other than the bracket 16 and the caulking ring 18 are omitted.

(Assembly process)
Then, the assembly | attachment process of the connector 12 which concerns on this embodiment is demonstrated. The assembly process is not limited to the following description.

  First, the terminal metal fitting 15 is crimped and connected to the end of the electric wire 14, and the molding part 24 is molded around those connecting parts. In addition, the connector housing 13, the rubber plug 26, the bracket 16, the braided wire 17 and the caulking ring 18 are passed through the electric wires 14 in advance, and the connector housing 13 is assembled to the mold portion 24 from the rear.

  Next, as shown in FIG. 6, the bracket 16 is assembled to the connector housing 13 from the rear (in the direction indicated by the arrow C), and the front end portion of the braided wire 17 is externally fitted to the cylindrical portion 35 from the rear. The caulking ring 18 is externally fitted to the front end portion of the braided wire 17 from behind.

  Then, when the caulking ring 18 is caulked from the outside using a jig with the front end portion of the braided wire 17 interposed between the cylindrical portion 35 and the caulking ring 18, The left and right sides are folded and protruded as a folded portion 40, and the braided wire 17 is sandwiched between the cylindrical portion 35 and the crimping ring 18 over the entire outer periphery of the cylindrical portion 35.

(Function, effect)
Then, the effect | action and effect of this embodiment are demonstrated. First, problems in the prior art will be described with reference to FIG. In the shield member according to the prior art, a protruding edge portion 136 protruding outward in the radial direction of the cylindrical portion 135 is formed on the cylindrical portion 135 of the bracket 116 over the entire circumference of the cylindrical portion 135. When the braided wire is crimped to the cylindrical portion 135 of the protruding edge 136 with the caulking ring 118, a force in the direction of reducing the diameter (the direction indicated by the arrow X in FIG. 13) is applied to the cylindrical portion 135. It is also received by the protruding edge 136 that continues to the tube part 135. The strong diameter-reducing force applied to both end portions (curved wall portions) on the small-diameter side of the cylindrical portion 135 is such that the projecting edge 136 is continuous over the entire circumference of the cylindrical portion 135. Other parts (a pair of opposing walls located between the curved walls) are also subjected to a force that is pressed from the protruding edge 136, and eventually a strong force is also applied to the opposing wall of the cylindrical part 135, and the cylindrical part No. 135 is considered to be bent and deformed radially inward (direction indicated by arrow Y).

  On the other hand, according to the present embodiment, when the caulking ring 18 is caulked to the cylindrical portion 35 of the bracket 16 and the folded portion 40 is formed in a region corresponding to the curved wall 38, the caulking portion is not caulked. A force is applied from the ring 18 to compress the tube portion 35 inward in the radial direction (the direction indicated by the arrow B in FIG. 5). Then, with respect to the opposing wall 37 in the cylindrical portion 35, a force in the diameter increasing direction (direction indicated by arrow A in FIG. 5) is applied by the reaction. In this embodiment, the pair of opposing walls 37, 37 are not formed with the protruding edge 36, thereby forming a flexible region that can be bent and deformed. That the flexible region is bent and deformed radially outward of the cylindrical portion 35 means that the gap between the cylindrical portion 35 and the caulking ring 18 is further reduced. Thereby, the braided wire 17 can be reliably clamped between the gaps between the crimping ring 18 and the flexible region. Thereby, the electrical connection between the bracket 16 and the braided wire 17 can be ensured. Further, the tensile strength between the bracket 16 and the braided wire 17 can be improved.

  In the present embodiment, the pair of opposing walls 37, 37 are curved in a convex shape with respect to the radially outer side of the cylindrical portion 35. As a result, the pair of opposing walls 37, 37 are surely bent and deformed radially outward of the cylindrical portion 35 when the caulking ring 18 is caulked. Thereby, the electrical connection between the bracket 16 and the braided wire 17 and the tensile strength can be reliably improved. As a result, poor connection between the bracket 16 and the braided wire 17 can be suppressed.

<Embodiment 2>
Next, Embodiment 2 of the present invention will be described with reference to FIGS. In the present embodiment, the vertical dimension of the protruding edge 46 is set to be substantially the same as the vertical dimension of the curved wall 38.

  Since the configuration other than the above is substantially the same as that of the first embodiment, the same members are denoted by the same reference numerals, and redundant description is omitted.

  According to this embodiment, since the height dimension of the bracket 45 can be reduced, the shield member 10 and the shield conductor 11 can be downsized as a whole.

<Embodiment 3>
Next, a third embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the vertical dimension of the protruding edge portion 56 of the bracket 55 is formed to be substantially the same as the vertical dimension of the outer surfaces of the pair of opposing walls 37, 37. Thereby, the width dimension of the left-right direction of the flexible area | region Q formed in a pair of opposing walls 37 and 37 is comparatively narrow.

  Since the configuration other than the above is substantially the same as that of the first embodiment, the same members are denoted by the same reference numerals, and redundant description is omitted.

<Embodiment 4>
Next, a fourth embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a plurality of projecting portions 60 projecting outward in the thickness direction of the opposing wall 37 are formed on the pair of opposing walls 37, 37 at intervals. The protrusion 60 is formed away from the protrusion edge 36. The protruding portion 60 comes into contact with the case in a state where the bracket 65 is attached to the case.

  In the present embodiment, a plurality of flexible regions R are formed between adjacent protrusions 60. The plurality of flexible regions R are separated from each other by the protruding portion 60, but the opposing wall 37 is bent and deformed as a whole.

  Since the configuration other than the above is substantially the same as that of the first embodiment, the same members are denoted by the same reference numerals, and redundant description is omitted.

  According to the present embodiment, the contact area between the case and the bracket 65 increases when the projecting portion 60 comes into contact with the case of the device, so that the shielding performance can be improved. Further, since the projecting portion 60 is separated from the projecting edge portion 36, a force for expanding and deforming the cylindrical portion 35 is transmitted from the projecting portion 60 to the projecting edge portion 36 and received by the projecting edge portion 36. It will never be done. As a result, the cylindrical portion 35 can be easily deformed to expand its diameter.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the present embodiment, the pair of opposed walls 37, 37 are slightly curved in a convex shape with respect to the outer side in the radial direction of the cylindrical portion 35, but the present invention is not limited to this, and the pair of opposed walls 37, 37 37 may have a flat shape.

  (2) In the present embodiment, the bracket 16 is used as the first shield member. However, the present invention is not limited to this. For example, the first shield member is attached so as to surround the outer side of the connector housing 13, and the connector housing. A shield shell that electromagnetically shields 13 may be used.

DESCRIPTION OF SYMBOLS 10 ... Shield member 11 ... Shield conductor 14 ... Electric wire 16, 45, 55, 65 ... Bracket (1st shield member)
17 ... Braided wire (second shield member)
DESCRIPTION OF SYMBOLS 18 ... Caulking 35 ... Tube part 36,46,56 ... Projection edge part 37 ... Opposite wall 38 ... Curved wall 60 ... Projection part P, Q, R ... Flexible area | region

Claims (4)

A metal first shield member into which an electric wire is inserted into a flat cylindrical portion composed of a pair of opposed walls facing each other and a curved pair of curved walls connecting between the pair of opposed walls;
A second shield member that is formed of a braided wire through which the electric wire is inserted and that is externally fitted in a state in which the terminal portion covers one end of the cylindrical portion;
A caulking ring that caulks and fixes the braided wire that is externally fitted to the cylindrical portion from the outer peripheral side;
Of the other end of the cylindrical portion, at least the pair of curved walls are formed with protruding edges that protrude outward in the thickness direction of the curved walls,
A shield member in which a pair of opposing walls is formed with a flexible region that can be bent and deformed radially outward of the cylindrical portion by not forming the protruding edge portion.   2. The shield member according to claim 1, wherein the pair of opposed walls are curved in a convex shape with respect to a radially outer side of the cylindrical portion. The pair of opposing walls protrude outward in the thickness direction of the opposing walls, and a plurality of protrusions spaced apart from the protruding edges are formed at intervals, and the plurality of protrusions The shield member according to claim 1 , wherein a plurality of the flexible regions are formed between adjacent protrusions, and the protrusions are in contact with a case of the device. Electric wires,
A first shield member made of metal through which the electric wire is inserted into a flat cylindrical portion composed of a pair of opposed walls facing each other and a pair of curved walls connecting between the pair of opposed walls;
A second shield member comprising a braided wire through which the electric wire is inserted and having a terminal portion fitted from one end side of the cylindrical portion;
A shield conductor including a caulking ring that is fixed by caulking the braided wire externally fitted to the cylindrical portion from the outer peripheral side;
Of the other end of the cylindrical portion, at least the pair of curved walls are formed with protruding edges that protrude outward in the thickness direction of the curved walls,
The shield conductor in which the said pair of opposing wall is formed with the flexible area | region which can bend and deform in the radial direction outward of the said cylinder part by not forming the said protrusion edge part.

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