JP6831205B2 - Shield member and shielded electric wire - Google Patents

Description

The present invention relates to a shield member including a shield shell and a braided shield connected to each other, and a shielded electric wire including the shield member.

As a connection structure between the shield shell and the braided shield, there is known that the braided shield is pressed against the shield shell by the tightening force of a tightening member made of strip-shaped metal (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2013-243077

In the above connection structure, when the tightening member is deformed by an external force or a thermal shock, the tightening force of the tightening member is reduced, and the mechanical and electrical connection between the shield shell and the braided shield is reliable. There is a problem that the sex is reduced.

An object to be solved by the present invention is to provide a shield member capable of ensuring the reliability of mechanical and electrical connection between the shield shell and the braided shield, and a shielded electric wire provided with the shield member.

[1] The shield member according to the present invention is a braided shield through which an electric wire is inserted, a shield shell having a tubular portion inserted into one end of the braided shield, and an annular member surrounding the one end of the braided shield. A tightening member that is bent and protrudes outward in the radial direction to tighten the one end of the braided shield and the tubular portion is provided integrally with the shield shell or attached to the shield shell. The fitting member is provided with a notch portion to which the crimping portion is fitted.

[2] In the above invention, the fitting member may be provided integrally with the shield shell, and the notch portion may be provided with a width reduction portion whose width gradually decreases from the opening side to the back side. Good.

[3] In the above invention, the crimping portion includes a pair of curved portions curved so as to approach each other, and the pair of curved portions and the notch portion may be fitted to each other.

[4] In the above invention, the fitting member may be an outer cylinder portion formed integrally with the shield shell so as to surround the entire circumference of the cylinder portion.

[5] In the above invention, the cross section of the tubular portion and the one end of the braided shield may be oval or elliptical, and the pair of the crimping portions is the one end of the tubular portion and the braided shield. May be arranged so as to sandwich in the minor axis direction of the cross section.

[6] In the above invention, the fitting member may be a mounting component that includes a first plate portion and a second plate portion that face each other and is attached to the shield shell. The notch portion is formed in the plate portion, and the second plate portion may be attached to the cylinder portion.

[7] The shielded electric wire according to the present invention includes the above-mentioned shield member and an electric wire inserted through the braided shield.

According to the present invention, since the crimping portion of the tightening member and the notch portion of the fitting member are fitted to each other, the diameter expansion of the tightening member 40 can be restricted, so that an external force is applied to the tightening member. Even when deformation occurs due to thermal shock, it is possible to suppress a decrease in the tightening force of the tightening member, and it is possible to ensure the reliability of the mechanical and electrical connection between the shield shell and the braided shield.

FIG. 1 is a perspective view showing a shielded electric wire according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the shielded electric wire shown in FIG. FIG. 3 is a plan view of the shielded electric wire shown in FIG. FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. FIG. 5A is a cross-sectional view showing a state in which the crimping portion is located in the narrowing portion, and FIG. 5B is a cross-sectional view showing a state in which the crimping portion is located in the fitting portion. FIG. 6 is a perspective view showing a shielded electric wire according to another embodiment of the present invention. FIG. 7 is an exploded perspective view of the shielded electric wire shown in FIG. FIG. 8 is a plan view of the shielded electric wire shown in FIG. FIG. 9 is a front view showing the mounting portion. FIG. 10 is a perspective view of the mounting portion shown in FIG. FIG. 11 is a front view showing a state before the mounting component is mounted on the mounting portion. FIG. 12 is a front view showing a state after the mounting component is mounted on the mounting portion. FIG. 13 is a rear view showing a state after the mounting component is mounted on the mounting portion. 14 (A) and 14 (B) are rear views for explaining a procedure for crimping the tightening member.

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

1 is a perspective view showing the shielded electric wire 1 according to the present embodiment, FIG. 2 is an exploded perspective view showing the shielded electric wire 1, FIG. 3 is a plan view showing the shielded electric wire 1, and FIG. 4 is FIG. It is a cross-sectional view along the IV-IV line of.

The shielded electric wire 1 includes at least one electric wire 15 and a shield member 100. The shielded electric wire 1 of the present embodiment includes a three-phase cable 10 composed of three electric wires 15 and a shield member 100 that collectively shields the three-phase cable 10, and is used as, for example, a power cable for an electric vehicle.

The shield member 100 includes a braided shield 20 into which a three-phase cable 10 is inserted, a shield shell 30 connected to the tip of the braided shield 20, and a tightening member 40 for connecting the braided shield 20 and the shield shell 30. It has. The shielded electric wire 1 is used, for example, in a state where the shield shell 30 is attached to an auxiliary machine of an automobile and the three-phase cable 10 is inserted into the auxiliary machine. In the following description, the auxiliary machine side of the shielded electric wire 1 is referred to as one end side, and the opposite side thereof is referred to as the other end side.

As shown in FIG. 3, the electric wire 15 includes a central conductor 16 and a coating layer 17. The central conductor 16 is a stranded wire in which a plurality of strands 161 are twisted together. The wire 161 is made of a metal material having high conductivity such as aluminum (Al), copper (Cu), or an alloy thereof. The coating layer 17 is made of a resin material having electrical insulation, and covers the outer periphery of the central conductor 16.

The braided shield 20 has a structure in which a plurality of bundled wires (not shown) are woven so as to intersect each other. Each bundle wire is composed of a plurality of strands (not shown) arranged in parallel. Each wire is composed of a metal material having high conductivity such as aluminum (Al), copper (Cu), or an alloy thereof. The braided shield 20 has a tubular shape and collectively surrounds the three-phase cable 10 (three electric wires 15). The cross-sectional shape of the braided shield 20 is an oval shape corresponding to the cross-sectional shape of the first tubular portion 32 described later of the shield shell 30. The cross-sectional shape of the braided shield 20 may be an elliptical shape.

The shield shell 30 includes a flange portion 31, a first tubular portion 32, and a second tubular portion 33. The shield shell 30 is made of a metal material having high conductivity such as a steel material.

The flange portion 31 has a rectangular (parallelogram in the present embodiment) outer shape, and an oval-shaped through hole 311 and a pair of bolt holes 312 are formed. The center of the flange portion 31 and the center of the through hole 311 coincide with each other. A three-phase cable 10 is inserted through the through hole 311. The through hole 311 may have an elliptical shape. Further, each bolt hole 312 is formed at an acute-angled corner portion, and the flange portion 31 is fixed to the auxiliary machine by the bolt inserted through the bolt hole 312.

The first tubular portion 32 is formed in a tubular shape having an oval cross section, and a three-phase cable 10 is inserted therein. The first tubular portion 32 may be formed in a tubular shape having an elliptical cross section. One end of the first tubular portion 32 in the axial direction is coupled to the peripheral edge portion of the through hole 311 of the flange portion 31. The first tubular portion 32 is inserted into one end of the braided shield 20.

The second tubular portion 33 is formed in a tubular shape having an oval cross section, and the first tubular portion 32 is provided inside the second tubular portion 33. The cross-sectional shape of the second tubular portion 33 is similar to the cross-sectional shape of the first tubular portion 32, and while the first tubular portion 32 is an inner cylinder, the second tubular portion 33 Is an outer cylinder that surrounds the entire circumference of one end of the first cylinder portion 32 and the braided shield 20. One end of the second tubular portion 33 in the axial direction is coupled to the plate surface of the flange portion 31. The second tubular portion 33 may be formed in a tubular shape having an elliptical cross section.

The height of the second tubular portion 33 from the flange portion 31 is lower than the height of the first tubular portion 32 from the flange portion 31, and the tip of the first tubular portion 32 is the second. It protrudes from the tip of the tubular portion 33 to the other end side of the shielded electric wire 1.

The second tubular portion 33 includes a pair of semicircular curved portions 332 and a pair of straight portions 333. The ends of the first tubular portion 32 and the second tubular portion 33 on the flange portion 31 side are referred to as the base ends thereof, and the flange portion 31 side of the first tubular portion 32 and the second tubular portion 33. The opposite end of is referred to as these tips. Further, the longitudinal direction in the cross section orthogonal to the axial direction of the first tubular portion 32 and the second tubular portion 33 is referred to as a major axis direction, and the direction orthogonal to the longitudinal direction in the cross section is a minor axis. Called direction.

Here, the second tubular portion 33 is formed with a pair of notch portions 331 corresponding to the crimping portions 42 of the pair of tightening members 40 described later. Each notch portion 331 is formed in each straight portion 333, and is arranged at the central portion in the major axis direction of the second tubular portion 33. The notch portion 331 is provided in a fitting portion 3311 having a constant width provided on the base end side of the straight portion 333, and a fitting portion 3311 provided on the tip end side of the straight line portion 333 and having a width from the tip end side (opening side). It is provided with a width reduction portion 3312 that gradually decreases toward the side (back side) (see both FIGS. 2 and 3). The width reduction portion 3312 is open at the tip of the straight portion 333. That is, the width of the notch portion 331 gradually narrows from the tip end to the intermediate portion of the straight line portion 333, and becomes constant from the intermediate portion to the proximal end side.

The edges on both sides of the notch 331 are inclined so that the width of the notch 331 gradually increases from the inner peripheral side to the outer peripheral side of the second tubular portion 33. A waterproof grommet (not shown) is attached to the second tubular portion 33.

The tightening member 40 is an annular member made of a metal material such as stainless steel or iron, and by being crimped, one end of the braided shield 20 and the first tubular portion 32 are tightened. The overall shape of the tightening member 40 is an oval shape corresponding to the cross-sectional shape of the first tubular portion 32 and the braided shield 20. The overall shape of the tightening member 40 may be an elliptical shape.

The tightening member 40 includes a pair of U-shaped main body portions 41 and a pair of crimping portions 42. The pair of main body portions 41 are provided corresponding to the curved portions of the first tubular portion 32 and the braided shield 20, and the pair of crimping portions 42 are provided corresponding to the pair of notch portions 331. The crimping portion 42 opens in the radial direction of the tightening member 40, and protrudes from the main body portion 41 in the radial direction of the tightening member 40. The crimping portion 42 before crimping has a U-shaped shape. On the other hand, the crimped portion 42 after crimping has a curved shape so that the side portions 421 on both sides approach each other (see FIG. 4).

In the tightening member 40 before crimping, the length of the inner circumference of the tightening member 40 in the major axis direction is compared with the length of the outer circumference of the braided shield 20 attached to the first tubular portion 32 in the major axis direction. The length of the inner circumference of the tightening member 40 in the minor axis direction (excluding the portion of the crimping portion 42) is the length in the minor axis direction of the outer circumference of the braided shield 20 attached to the first tubular portion 32. It is larger than that. On the other hand, in the tightening member 40 after crimping, the length of the inner circumference of the tightening member 40 in the long axis direction is the length in the long axis direction of the outer circumference of the braided shield 20 attached to the first tubular portion 32. The length in the minor axis direction of the inner circumference of the tightening member 40 (excluding the portion of the crimping portion 42) matches the length in the minor axis direction of the outer circumference of the braided shield 20 attached to the first tubular portion 32. Matches the length of. That is, the diameter of the tightening member 40 is reduced by crimping the pair of crimping portions 42.

In the tightening member 40 after crimping, the crimping portion 42 is located at the fitting portion 3311 of the notch portion 331, and the side portions 421 on both sides of the crimping portion 42 have the edges on both sides of the fitting portion 3311. I'm biting into it. As a result, the side portions 421 on both sides of the crimping portion 42 are maintained in a curved state so as to approach each other, and the diameter expansion of the tightening member 40 is restricted, so that the tightening member 40 is tightened. The force is maintained.

In the shield member 100 according to the present embodiment, a pair of crimping portions 42 and a pair of notch portions 331 are provided, but one, three or more, or a plurality of pairs of each may be provided. Further, it is not essential to provide the second tubular portion 33 that surrounds the entire circumference of the first tubular portion 32, and a member in which the notch portion 331 is formed may be provided integrally with the shield shell 30. Further, it is not essential to provide the notch portion 331 with the width reduction portion 3312, and the width of the notch portion 331 may be constant.

Hereinafter, a method of connecting the braided shield 20 and the shield shell 30 will be described. First, the braided shield 20 is inserted through the tightening member 40, and the first tubular portion 32 of the shield shell 30 is inserted into one end of the braided shield 20. At this time, one end of the braided shield 20 is inserted between the first tubular portion 32 and the second tubular portion 33. Next, by crimping the tightening member 40, one end of the braided shield 20 and the first tubular portion 32 are tightened.

5 (A) and 5 (B) are diagrams for explaining a procedure for crimping the tightening member 40. FIG. 5A is a cross-sectional view showing a state in which the crimping portion 42 is located in the width reducing portion 3312, and FIG. 5B is a cross-sectional view showing a state in which the crimping portion 42 is located in the fitting portion 3311. It is a figure.

As shown in FIG. 5A, the maximum width W of the crimping portion 42 before crimping is smaller than the maximum value W _max of the width of the notch portion 331. On the other hand, the maximum width W of the crimping portion 42 after crimping is larger than the minimum value W _min of the width of the notch portion 331.

In the process of crimping the tightening member 40, the pair of crimping portions 42 and the pair of notch portions 331 are aligned, and the tightening member 40 is attached to one end of the braided shield 20 and the second cylinder by using a press machine. Push it between the part 33 and the part 33. At that time, each crimping portion 42 is press-fitted into each notch portion 331. Here, the width of the narrowing portion 3312 of the notch portion 331 decreases from the maximum value W _max to the minimum value W _min from the opening side to the back side, so that the side portions 421 on both sides of the crimping portion 42 are formed. , Curved to approach each other.

As a result, as shown in FIG. 5B, in the tightening member 40 after crimping, the edge portions on both sides of the fitting portion 3311 bite into the side portions 421 on both sides of the crimping portion 42, and the side portions on both sides. When the 421s are curved so as to approach each other, the diameter of the tightening member 40 is reduced, and a tightening force is generated on the tightening member 40. By the tightening force of the tightening member 40, one end of the braided shield 20 and the first tubular portion 32 of the shield shell 30 are mechanically and electrically connected.

As described above, in the shield member 100 according to the present embodiment, the second tubular portion 33 as a fitting member is provided integrally with the shield shell 30, and the cut formed in the second tubular portion 33. The crimping portion 42 is fitted to the notch portion 331. This limits the diameter expansion of the tightening member 40. Therefore, even if the tightening member 40 is deformed by an external force or a thermal shock, a decrease in the tightening force of the tightening member 40 can be suppressed, so that one end of the braided shield 20 and the shield shell 30 are mechanically connected. And the reliability of the electrical connection can be ensured.

Further, in the shield member 100 according to the present embodiment, a notch portion 331 is formed in a second tubular portion 33 provided integrally with the shield shell 30, and the notch portion 331 is from the opening side to the back side. It is provided with a width reduction portion 3312 whose width gradually decreases toward. As a result, the crimping portion 42 and the notch portion 331 are aligned, the tightening member 40 is pushed between one end of the braided shield 20 and the second tubular portion 33, and the crimping portion 42 is inserted into the notch portion. By press-fitting into 331, the crimping portion 42 can be gradually crimped by the width reducing portion 3312. Therefore, the workability of the tightening process of the tightening member 40 can be improved.

Further, in the shield member 100 according to the present embodiment, the crimping portion 42 is provided with side portions 421 on both sides curved so as to approach each other, and the notch portions 331 are fitted in the side portions 421 on both sides. It fits. As a result, the springback of the crimping portion 42 can be effectively suppressed by the second tubular portion 33, and the decrease in the tightening force of the tightening member 40 can be effectively suppressed.

Here, when there is no outer cylinder portion that surrounds the entire circumference of one end of the braided shield 20, it is possible to prevent the tightening force of the tightening member 40 from being reduced by applying an external force to the tightening member 40. For the purpose, after crimping the crimping portion 42, it is necessary to cover one end of the braided shield 20 and the crimping portion 42 with tape. On the other hand, in the shield member 100 according to the present embodiment, the second tubular portion 33 is formed integrally with the shield shell 30 so as to surround the entire circumference of the first tubular portion 32 and one end of the braided shield 20. The outer cylinder portion is the outer cylinder portion, and the main body portion 41 of the tightening member 40 is housed between one end of the braided shield 20 and the second cylinder portion 33. As a result, it is possible to prevent an external force from being applied to the tightening member 40, so that it is possible to prevent the tightening force of the tightening member 40 from being lowered without performing a step of winding the tape around one end of the braided shield 20 after crimping. can do.

Further, in the shield member 100 according to the present embodiment, the pair of crimping portions 42 sandwiches one end of the first tubular portion 32 having an oval cross section and the braided shield 20 in the minor axis direction. It is arranged in. As a result, as compared with the case where one crimping portion 42 is provided, or when the pair of crimping portions 42 are arranged so as to sandwich one end of the first tubular portion 32 and the braided shield 20 in the major axis direction thereof. The diameter reduction ratio of the tightening member 40 after crimping can be efficiently increased, and the tightening force of the tightening member 40 can be efficiently increased.

The "shielded electric wire 1" in the present embodiment corresponds to an example of the "shielded electric wire" in the present invention, and the "shield member 100" in the present embodiment corresponds to an example of the "shielded member" in the present invention. The "electric wire 15" in the embodiment corresponds to an example of the "electric wire" in the present invention. The "braided shield 20" in the present embodiment corresponds to an example of the "braided shield" in the present invention, and the "shield shell 30" in the present embodiment corresponds to an example of the "shield shell" in the present invention. The "tightening member 40" in the embodiment corresponds to an example of the "tightening member" in the present invention, and the "second cylinder portion 33" in the present embodiment is the "fitting member" and the "outer cylinder" in the present invention. Corresponds to an example of "part".

The "first cylinder portion 32" in the present embodiment corresponds to an example of the "cylinder portion" in the present invention, and the "tightening portion 42" in the present embodiment corresponds to an example of the "tightening portion" in the present invention. Correspondingly, the "notch portion 331" in the present embodiment corresponds to an example of the "notch portion" in the present invention, and the "width reduction portion 3312" in the present embodiment is the "width reduction portion" in the present invention. Corresponding to one example, the "side portion 421" in the present embodiment corresponds to an example of the "curved portion" in the present invention.

FIG. 6 is a perspective view showing the shielded electric wire 1 according to another embodiment, FIG. 7 is an exploded perspective view showing the shielded electric wire 1, and FIG. 8 is a plan view showing the shielded electric wire 1. The shielded electric wire 11 includes a three-phase cable 10 composed of three electric wires 15 and a shield member 1000. The shield member 1000 includes a braided shield 20, a shield shell 130 connected to one end of the braided shield 20, a tightening member 140 for connecting the braided shield 20 and the shield shell 130, and a springback of the tightening member 140. It is provided with a mounting component 50 for preventing the above. The same reference numerals are given to the same configurations as those in the above-described embodiment, and the description in the above-described embodiment is incorporated by omitting the repeated description.

As shown in FIGS. 6 to 8, the shield shell 130 includes a flange portion 131 and a tubular portion 132. The shield shell 130 is made of a metal material having high conductivity such as a steel material.

The flange portion 131 has a rectangular (parallelogram in the present embodiment) outer shape, and an oval-shaped through hole 311 and a pair of bolt holes 312 are formed. The center of the flange portion 131 and the center of the through hole 311 coincide with each other. The through hole 311 may be formed in an elliptical shape.

The tubular portion 132 is formed in a tubular shape having an oval cross section, and a three-phase cable 10 is inserted therein. The tubular portion 132 may be formed in a tubular shape having an elliptical cross section. One end of the tubular portion 132 in the axial direction is coupled to the peripheral edge portion of the through hole 311 of the flange portion 131. The tubular portion 132 is inserted at one end of the braided shield 20.

The tubular portion 132 includes a pair of semicircular curved portions 1322 and a pair of straight portions 1323. The end of the tubular portion 132 on the flange portion 31 side is referred to as a base end thereof, and the end portion of the tubular portion 132 on the opposite side of the flange portion 31 side is referred to as these tips. Further, the longitudinal direction in the cross section orthogonal to the axial direction of the tubular portion 132 is referred to as a major axis direction, and the direction orthogonal to the major axis direction in the cross section is referred to as a minor axis direction.

A mounting portion 133 is formed on one of the straight portion 1323 and the flange portion 131 of the tubular portion 132, corresponding to the mounting component 50 described later. The mounting portion 133 will be described later.

The tightening member 140 is an annular member made of a metal material such as stainless steel or iron, and by being crimped, one end of the braided shield 20 and the tubular portion 132 are tightened. The tightening member 40 of the above-described embodiment includes a pair of tightening portions 42, whereas the tightening member 140 of the present embodiment includes one crimping portion 42.

The tightening member 140 includes an oval-shaped main body portion 141 and the above-mentioned crimping portion 42. The main body portion 141 includes a pair of curved portions 1411 corresponding to the curved portions of the tubular portion 132 and the braided shield 20. The crimping portion 42 opens in the radial direction of the tightening member 140, and projects from both ends of the main body portion 141 toward the radial outside of the tightening member 140. The main body 141 may be formed in an elliptical shape.

In the tightening member 140 before crimping, the length of the inner circumference of the tightening member 140 in the major axis direction is larger than the length of the outer circumference of the braided shield 20 attached to the tubular portion 132 in the major axis direction. The length of the inner circumference of the tightening member 140 in the minor axis direction (excluding the portion of the crimping portion 42) is larger than the length of the outer circumference of the braided shield 20 attached to the tubular portion 132 in the minor axis direction. ing. On the other hand, in the tightening member 140 after crimping, the length of the inner circumference of the tightening member 140 in the major axis direction is one with the length of the outer circumference of the braided shield 20 attached to the tubular portion 132 in the major axis direction. The length of the inner circumference of the tightening member 140 in the minor axis direction (excluding the portion of the crimping portion 42) coincides with the length of the outer circumference of the braided shield 20 attached to the tubular portion 132 in the minor axis direction. There is.

In the tightening member 140 after crimping, the side portions 421 on both sides of the crimping portion 42 are curved so as to approach each other (see FIG. 13), and the diameter of the tightening member 140 is reduced to tighten the members. A tightening force is generated on the attachment member 140. By the tightening force of the tightening member 140, one end of the braided shield 20 and the tubular portion 132 of the shield shell 130 are mechanically and electrically connected.

The mounting part 50 is a U-shaped part made of a metal material such as stainless steel or iron, and is mounted on the mounting portion 133 to prevent springback of the crimping portion 42 after crimping. The mounting component 50 includes first and second plate portions 51 and 52 facing each other. The first plate portion 51 is formed with a U-shaped notch portion 511 from the tip end to the base end. Side portions 421 on both sides of the crimped portion 42 after crimping are fitted into the notch portion 511.

FIG. 9 is a front view showing the mounting portion 133, and FIG. 10 is a perspective view showing the mounting portion 133. As shown in these figures, the flange portion 131 and the tubular portion 132 are formed with openings 134 and 135 so as to straddle them. The opening 134 is formed in a rectangular shape so as to open inward in the radial direction at the central portion of the flange portion 131 in the major axis direction. On the other hand, the opening 135 is formed in a rectangular shape so as to open at the central portion of the tubular portion 132 in the long axis direction toward the proximal end side thereof.

The mounting portion 133 is formed at the position where the openings 134 and 135 are formed. The mounting portion 133 includes a pair of left and right groove portions 1331 into which the second plate portion 52 is press-fitted. Each groove portion 1331 is formed on the left and right side walls of the opening 135. Here, a U-shaped convex portion 1331A protrudes from the inner walls of the flange portion 131 and the tubular portion 132, and the convex portion 1331A constitutes the bottom portion of the groove portion 1331. The height from the convex portion 1331A to the upper end of the opening 134 is larger than the height of the mounting component 50, and when the second plate portion 52 is press-fitted into the groove portion 1331, the first plate portion 51 is located above the opening 135.

Here, the crimping portion 42 of the tightening member 140 is located above the opening 135, and the curved side portions 421 of the crimping portion 42 on both sides are notched portions 511 of the first plate portion 51. Fit into. As a result, the springback of the crimping portion 42 is restricted by the first plate portion 51, and the diameter expansion of the tightening member 140 is restricted, so that a decrease in the tightening force of the tightening member 140 is suppressed.

In the shield member 100 according to the present embodiment, one crimping portion 42 and one mounting component 50 are provided, but a plurality of these (for example, a pair of each) may be provided. Here, when a pair of the crimping portion 42 and the mounting component 50 are provided, it is preferable that one ends of the tubular portion 132 and the braided shield 20 are arranged so as to sandwich them in the minor axis direction.

Hereinafter, a method of connecting the braided shield 20 and the shield shell 130 will be described. First, the braided shield 20 is inserted through the tightening member 140, and the tubular portion 132 of the shield shell 130 is inserted into one end of the braided shield 20. Next, one end of the braided shield 20 and the first tubular portion 32 are tightened by crimping the crimping portion 42 of the tightening member 140. After that, the mounting component 50 is mounted on the mounting portion 133, and the crimping portion 42 is fitted into the notch portion 511 of the first plate portion 51.

11 to 13 are views for explaining a procedure for fitting the crimping portion 42 into the notch portion 511 of the first plate portion 51. FIG. 11 is a front view showing a state before the mounting component 50 is mounted on the mounting portion 133, and FIG. 12 is a front view showing a state after the mounting component 50 is mounted on the mounting portion 133. FIG. It is a rear view which shows the state after attaching the attachment part 50 to the attachment part 133. 14 (A) and 14 (B) are rear views for explaining a procedure for crimping the tightening member 140.

As shown in FIG. 14A, the crimping portion 42 before crimping has a U-shape, and the width of the crimping portion 42 is equivalent to the width of the opening 134. On the other hand, as shown in FIGS. 11 and 14 (B), the minimum value w _min of the width of the crimped portion 42 after _crimping is smaller than the width of the opening 134.

Here, as shown in FIG. 13, the minimum value w _min of the width of the crimping portion 42 after _crimping is the same as the width of the notch portion 511 of the first plate portion 51. Further, on the outside of the side portions 421 on both sides of the crimping portion 42 after crimping, there is a space for inserting the first plate portion 51 of the mounting component 50 from the opening 134.

Therefore, as shown in FIGS. 12 and 13, the first plate portion 51 is inserted from the opening 134 to the top of the opening 135 while the second plate portion 52 is press-fitted into the groove 1331, and at that time, , Side portions 421 on both sides of the crimping portion 42 are inserted into the notch portion 511 of the first plate portion 51. As a result, the springback of the side portions 421 on both sides of the crimping portion 42 is restricted by the first plate portion 51, and the diameter expansion of the tightening member 140 is restricted, so that the tightening force of the tightening member 140 is increased. It is maintained and the mechanical and electrical connection between one end of the braided shield 20 and the tubular portion 132 of the shield shell 130 is maintained.

As described above, in the shield member 1000 according to the present embodiment, the first plate portion 51 on which the notch portion 511 is formed and the mounting component 50 in which the second plate portion faces each other are shield shells. Attach to 130. Specifically, after crimping the crimping portion 42 of the tightening member 140, the second plate portion 52 is attached to the mounting portion 133 provided on the tubular portion 132, and the notch of the first plate portion 51 is notched. The curved portion of the crimping portion 42 is fitted to the portion 511. As a result, it is possible to suppress a decrease in the tightening force of the tightening member 140 due to the springback of the tightening member 140 after crimping.

The "shielded electric wire 11" in the present embodiment corresponds to an example of the "shielded electric wire" in the present invention, and the "shield member 1000" in the present embodiment corresponds to an example of the "shielded member" in the present invention. The "shield shell 130" in the present embodiment corresponds to an example of the "shield shell" in the present invention, and the "tightening member 140" in the present embodiment corresponds to an example of the "tightening member" in the present invention. The "mounting component 50" in the present embodiment corresponds to an example of the "fitting member" and the "mounting component" in the present invention. The "cylinder portion 132" in the present embodiment corresponds to an example of the "cylinder portion" in the present invention, and the "notch portion 511" in the present embodiment corresponds to an example of the "notch portion" in the present invention.

It should be noted that the embodiments described above are described for facilitating the understanding of the present invention, and are not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

For example, in the above-described embodiment, as the shielded electric wire, the shielded electric wires 1 and 11 in which the three-phase cable 10 composed of three electric wires 15 are inserted into the shielded shells 30 and 130 are given as an example, but the shielded shells 30 and 130 The number of electric wires 15 inserted into the wire 15 is not limited to this. The present invention can also be applied to a shielded electric wire having a connector to which a connector is attached to the shielded shells 30 and 130.

1 ... Shielded electric wire 10 ... Three-phase cable 15 ... Electric wire 16 ... Central conductor 161 ... Wire 17 ... Coating layer 100 ... Shield member 20 ... Braided shield 30 ... Shield shell 31 ... Flange part 311 ... Through hole 312 ... Bolt hole 32 ... 1st cylinder 33 ... 2nd cylinder 331 ... Notch
3311 ... Fitting part
3312 ... Reduced width part 332 ... Curved part 333 ... Straight line 40 ... Tightening member 41 ... Main body part 42 ... Clamping part 421 ... Side part 11 ... Shielded wire 1000 ... Shield member 130 ... Shield shell 131 ... Flange part 132 ... Cylinder part 1322 ... Curved part 1323 ... Straight part 133 ... Mounting part 1331 ... Groove 1331A ... Convex part 134 ... Opening 135 ... Opening 140 ... Tightening member 141 ... Main body 1411 ... Curved part 50 ... Mounting part 51 ... First plate Part 511 ... Notch part 52 ... Second plate part

Claims (7)

A braided shield through which electric wires are inserted and
A shield shell having a tubular portion inserted at one end of the braided shield,
An annular member that surrounds the one end of the braided shield, includes a crimping portion that is bent and protrudes outward in the radial direction, and a tightening member that tightens the one end of the braided shield and the tubular portion.
A shield member including a fitting member provided integrally with the shield shell or attached to the shield shell and formed with a notch portion to which the crimping portion is fitted. The shield member according to claim 1 .
The crimping portion comprises a pair of curved portions curved so as to approach each other.
A shield member in which the pair of curved portions and the notch portions are fitted to each other. The shield member according to claim 1 or 2 .
The cross section of the tubular portion and the one end of the braided shield is oval or elliptical.
A pair of crimping portions are provided.
The pair of crimping portions are shield members arranged so as to sandwich the tubular portion and the one end of the braided shield in the minor axis direction of the cross section. The shield member according to any one of claims 1 to 3 .
The fitting member is provided integrally with the shield shell, and is provided.
The notch portion is a shield member including a width reduction portion whose width gradually decreases from the opening side to the back side. The shield member according to any one of claims 1 to 4 .
The fitting member is a shield member that is an outer cylinder portion that is integrally formed with the shield shell and is formed so as to surround the entire circumference of the cylinder portion. The shield member according to any one of claims 1 to 3 .
The fitting member is a mounting component that includes a first plate portion and a second plate portion that face each other and is attached to the shield shell.
The notch portion is formed in the first plate portion.
The second plate portion is a shield member attached to the cylinder portion. The shield member according to any one of claims 1 to 6.
A shielded electric wire including an electric wire inserted through the braided shield.

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