Shielded wire terminal structure, wire with terminal, connector structure

Abstract

To provide a terminal structure of a shield wire, etc. in which the terminal structure has a good producing workability and has high reliability of electric connection with a shield layer.SOLUTION: First, a prescribed length of an outer cover 3 is peeled from an end of a shield wire 1 such that an internal braided wire 5 is exposed. Next, the exposed braided wire 5 is folded toward a direction opposite to the end side of the shield wire 1. Next, an inner ferrule 9 is put on an outer circumference of the braided wire 5. The inner ferrule 9 is a metallic tubular member, and one end side thereof has an expanded diameter to form a diameter expansion portion 11 having an outer diameter relatively larger than the remaining portion. Next, the braided wire 5 is folded again toward the end side of the shield wire 1. Next, an outer ferrule 13 is put on the outer circumference of the folded braided wire 5. Thus, the outer ferrule 13 and the diameter expansion portion 11 of the inner ferrule 9 are securely in direct contact with each other.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a terminal structure of a shielded electric wire used in, for example, an automobile, an electric wire with a terminal, and a connector structure thereof. [Background technology]

[0002] BACKGROUND ART Conventionally, shielded electric wires have been used in electric wires used in wire harnesses of automobiles in order to suppress the influence of noise generated from the electric wires on the outside and the influence of external noise on the electric wires.

[0003] As such a shielded electric wire, for example, a shielded electric wire has been proposed in which a shielding layer made of a braided wire is formed on the outer periphery of an insulated coated electric wire, and an outer sheath is formed on the outer periphery of the shielding layer. When a terminal or the like is connected to the end of such a shielded electric wire to form a connector, it is necessary to form a terminal structure for grounding the shielding layer.

[0004] 8A and 8B are diagrams showing steps for forming a conventional terminal structure. First, as shown in Fig. 8A and Fig. 8B, a predetermined length of the outermost outer sheath 103 of the shielded electric wire 100 is cut and removed from the end, exposing the inner braided wire 105.

[0005] Next, as shown in Fig. 8(c), the braided wire 105 is cut to a predetermined length to expose the internal core portion 107. That is, a predetermined length of the braided wire 105 is exposed from the tip of the outer sheath 103, and a predetermined length of the core portion 107 is exposed from the tip of the braided wire 105. The core portion 107 is an electric wire whose conductor is covered with an insulating coating.

[0006] Next, as shown in Fig. 8(d), a predetermined length of inner ferrule 109 is placed near the end of the outer jacket 103. The inner ferrule 109 is a ring-shaped metal member. Thereafter, as shown in Fig. 8(e), the braided wire 105 exposed from the outer jacket 103 is folded back toward the outer jacket 103 (the inner ferrule 109 side). As a result, the inner ferrule 109 is covered with the braided wire 105.

[0007] 8(f), the outer ferrule 113 is placed on the outer periphery of the braided wire 105. The outer ferrule 113 is a metal annular member similar to the inner ferrule 109, and has an inner diameter larger than the outer diameter of the inner ferrule 109. In this state, by compressing the outer ferrule 113 from the outside, the braided wire 105 can be crimped while being sandwiched between the inner ferrule 109 and the outer ferrule 113.

[0008] Thereafter, a terminal is connected to the core portion 107 and accommodated in the connector body. At this time, the outer ferrule 113 is brought into contact with a metal member inside the connector body, and the metal member is connected to a ground wire, thereby grounding the shield layer of the shielded electric wire 100.

[0009] However, this method requires cutting the braided wire 105 to a predetermined length after exposing it. This increases the number of steps. Furthermore, there is a risk of damaging the internal core portion 107 when cutting the braided wire 105. Furthermore, there is a risk of contamination, such as pieces of the braided wire 105 getting into other components. In contrast, if the braided wire 105 is folded back without being cut, the folded back length of the braided wire 105 becomes longer, resulting in a larger terminal structure. Furthermore, if the cut length of the outer sheath 103 is shortened, the subsequent terminal connection work becomes difficult.

[0010] In response to this problem, a method has been proposed in which a slit is made in part of the outer sheath, the outer sheath is shifted toward the tip, and then the sheath is returned to the rear without being completely removed, spreading the braided wire into a fan shape, and the spread braided wire is placed over the inner ferrule, and the outer ferrule is then attached from above (Patent Document 1). [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-257043 Summary of the Invention [Problem to be solved by the invention]

[0012] As described above, the outer ferrule 113 is grounded by contacting a metal member inside the connector. However, in the conventional method, electrical continuity between the braided wire 105 and the outer ferrule 113 is established by contact between the braided wire 105 and the outer ferrule 113, but the inner ferrule 109 is not involved in the electrical continuity between the braided wire 105 and the metal member, and functions only as a receiving member for the crimping of the outer ferrule 113. As a result, the reliability of the electrical connection between the braided wire 105 and the metal member is insufficient, and there is a risk of increased ground resistance.

[0013] The present invention has been made in view of the above problems, and has an object to provide a terminal structure for a shielded electric wire that is easy to manufacture and has high reliability of electrical connection with the shielding layer. [Means for solving the problem]

[0014] In order to achieve the above-mentioned object, a first invention is an end structure of a shielded electric wire having a core portion where a conductor is covered with an insulating coating, a braided wire that is arranged around the core portion, and an outer covering that covers the outer surface of the braided wire, wherein a predetermined length of the outer covering is peeled off to expose the braided wire, and the braided wire is folded back in the opposite direction to the end of the shielded electric wire, an inner ferrule is arranged around the braided wire, the braided wire is folded back again towards the end of the shielded electric wire so as to cover the outer surface of the inner ferrule, and an outer ferrule is arranged around the braided wire, and the inner ferrule and the outer ferrule are crimped together with the braided wire sandwiched between them, and one end of the inner ferrule has an expanded diameter and is in direct contact with the end of the outer ferrule.

[0015] The inner ferrule may have at its tip an insertion portion into which an end of the outer ferrule can be inserted, and the end of the outer ferrule may be inserted into the insertion portion.

[0016] The insertion portion may be formed so that the end of the inner ferrule is folded back toward the rear, leaving a gap, and the tip portion of the outer ferrule may have an outer shape corresponding to the inner shape of the insertion portion, and the tip portion of the outer ferrule may be in face-to-face contact with the inner surface of the insertion portion.

[0017] A recess or a protrusion may be formed on the inner surface of the insertion portion, and a protrusion or recess that can be fitted into the recess or protrusion may be formed on the outer surface of the tip end of the outer ferrule.

[0018] The outer ferrule and the inner ferrule may be crimped together at the insertion portion.

[0019] A part of the inner ferrule may be exposed on the outer peripheral surface of the terminal structure.

[0020] According to the first invention, an inner ferrule is placed on the outer periphery of the portion where the braided wire is folded backward, and the braided wire is folded forward again on its outer surface, thereby reducing the work of cutting the braided wire without increasing the size of the terminal structure portion.

[0021] Furthermore, when the braided wire is sandwiched between the inner ferrule and the outer ferrule, the inner ferrule and the outer ferrule can be brought into direct contact with each other. Therefore, when grounding the braided wire, not only the electrical continuity between the braided wire and the outer ferrule as in the conventional case can be utilized, but also the electrical continuity between the braided wire and the inner ferrule. This results in higher electrical connection reliability.

[0022] In addition, by forming an insertion portion at the tip of the inner ferrule into which the end of the outer ferrule can be inserted and inserting the end of the outer ferrule into the insertion portion, it is possible to more reliably bring the inner ferrule and outer ferrule into contact and establish electrical contact.

[0023] Furthermore, by forming the insertion portion so that it folds back toward the rear side of the inner ferrule with a gap, and by giving the tip of the outer ferrule an outer shape that corresponds to the inner shape of the insertion portion, it is possible to more reliably bring the inner ferrule and outer ferrule into surface contact and establish electrical conductivity.

[0024] In addition, by forming a recess or protrusion on the inner surface of the insertion portion and forming a protrusion or recess that can fit into the recess or protrusion on the outer surface of the tip of the outer ferrule, the two can be fitted together when the outer ferrule is inserted into the insertion portion.

[0025] Furthermore, by exposing a portion of the inner ferrule on the outer circumferential surface of the crimping portion, the inner ferrule can be brought into direct contact with the metal member when housed in the connector body.

[0026] The second invention is an electric wire with terminal having the terminal structure of the shielded electric wire according to the first invention, characterized in that a predetermined length of the insulating coating is peeled off from the tip of the core portion, and the internal conductor is connected to a terminal.

[0027] According to the second aspect of the present invention, it is possible to obtain an electric wire with a terminal that has high reliability of electrical connection with the shield layer.

[0028] The third invention is a connector structure in which the terminal-equipped electric wire of the second invention is accommodated in a connector, characterized in that a metal member is arranged on the inner surface of the terminal insertion portion of the connector, and the braided wire and the metal member are electrically conductive.

[0029] The metal member may be in contact with the inner ferrule or the outer ferrule by a spring force.

[0030] According to the third aspect of the present invention, a connector structure can be obtained that also has high reliability of electrical connection with the shielding layer.

[0031] In particular, the inner ferrule or the outer ferrule comes into contact with the metal member by spring force, thereby achieving higher electrical connection reliability. [Effects of the Invention]

[0032] According to the present invention, it is possible to provide a terminal structure for a shielded electric wire that is easy to manufacture and has high reliability of electrical connection with the shielding layer. [Brief explanation of the drawings]

[0033] [Figure 1] 3A to 3C are diagrams showing the process of manufacturing a terminal structure using a shielded electric wire 1. [Figure 2] 1A is a cross-sectional view of an electric wire terminal structure 20, and FIG. 1B is a cross-sectional view showing a connector structure 21 using the electric wire terminal structure 20. FIG. [Figure 3] 1A is a diagram showing a process for forming an electric wire terminal structure using an inner ferrule 9a, and FIG. 1B is a cross-sectional view of an electric wire terminal structure 20a. [Figure 4] 10(a) and 10(b) are diagrams showing a process for forming an electric wire terminal structure using an inner ferrule 9a and an outer ferrule 13a. [Figure 5] 1A is a cross-sectional view of an electric wire terminal structure 20b, and FIG. 1B is a cross-sectional view showing a connector structure 21a using the electric wire terminal structure 20b. [Figure 6] 10(a) and 10(b) are diagrams showing a process for forming an electric wire terminal structure using an inner ferrule 9b and an outer ferrule 13b. [Figure 7] 1A is a cross-sectional view showing a connector structure 21b, and FIG. 1B is a cross-sectional view showing a connector structure 21c. [Figure 8] 10A to 10C are diagrams showing the process of a conventional terminal structure using a shielded electric wire 100. DETAILED DESCRIPTION OF THE INVENTION

[0034] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a diagram showing a process for forming a terminal structure of a shielded electric wire 1. As shown in Fig. 1(a), the shielded electric wire 1 is arranged with a core part 7, a braided wire 5, and an outer sheath 3 in this order from the center side.

[0035] The core portion 7 is formed by insulatingly covering a conductor wire. A braided wire 5 is arranged as a shielding layer on the outer periphery of the core portion 7. An outer jacket 3 that covers the braided wire 5 is also arranged on the outer periphery of the braided wire 5.

[0036] As shown in Fig. 1(b), first, a predetermined length of the outer sheath 3 is peeled off and removed from the tip of the shielded wire 1 to expose the internal braided wire 5. Next, as shown in Fig. 1(c), the exposed braided wire 5 is folded back in the opposite direction from the end of the shielded wire 1. In other words, the braided wire 5 is placed around the outer sheath 3. At this time, there is no need to cut the braided wire 5, and substantially the entire length of the exposed braided wire 5 is folded back around the outer sheath 3.

[0037] Next, as shown in FIG. 1(d), an inner ferrule 9 is placed around the braided wire 5. The inner ferrule 9 is a metallic cylindrical member, and one end side is expanded to form an expanded diameter portion 11 whose outer diameter is larger than the other portions. At this time, the inner ferrule 9 is placed at the end of the braided wire 5 (the end where the braided wire 5 is folded back) with the expanded diameter portion 11 facing the tip side of the shielded electric wire 1. The axial length of the inner ferrule 9 is equal to or less than half the length of the folded braided wire 5.

[0038] Next, as shown in FIG. 1( e), the braided wire 5 is folded back again toward the end of the shielded wire 1. The folded back braided wire 5 covers the outer periphery of the inner ferrule 9. At this time, by folding back the braided wire 5 until the tip of the braided wire 5 hits the side surface of the enlarged diameter portion 11, the folding back position of the braided wire 5 can be grasped. In addition, the enlarged diameter portion 11 is not covered by the braided wire 5, and the enlarged diameter portion 11 can be exposed from the braided wire 5.

[0039] Next, the outer ferrule 13 is placed around the folded-back braided wire 5. That is, the braided wire 5 is sandwiched between the inner ferrule 9 and the outer ferrule 13. The outer ferrule 13 is inserted into the shielded wire 1 in advance and is retracted from the terminal structure. After the braided wire 5 is retracted again, the outer ferrule 13 can be placed around the outer periphery of the inner ferrule 9 (braided wire 5) by moving the outer ferrule 13 from the retracted position toward the tip end of the shielded wire 1.

[0040] In this case, if the outer diameter of the expanded diameter portion 11 of the inner ferrule 9 is larger than the inner diameter of the outer ferrule 13, the end face of the outer ferrule 13 can be positioned so that it abuts against the side surface of the expanded diameter portion 11 of the inner ferrule 9. This makes it easy to position the outer ferrule 13, and ensures that the outer ferrule 13 and inner ferrule 9 are in direct contact with each other.

[0041] In this manner, with the braided wire 5 sandwiched between the inner ferrule 9 and the outer ferrule 13, the outer ferrule 13 is compressed and crimped from its outer periphery, thereby forming an electric wire terminal structure.

[0042] 2(a) is a cross-sectional view showing the obtained electric wire terminal structure 20. In the electric wire terminal structure 20, a predetermined length of the outer jacket 3 is removed from the tip of the shielded electric wire 1, and the exposed braided wire 5 is folded back once backward (toward the outer jacket 3) and then folded back again toward the tip (toward the exposed core portion 7) around the outer periphery of the inner ferrule 9. In addition, the outer ferrule 13 is placed around the outer periphery of the inner ferrule 9, sandwiching the braided wire 5 therebetween, and is then crimped. In this way, there is no need to cut the braided wire 5 when manufacturing the electric wire terminal structure 20.

[0043] Furthermore, an electric wire with a terminal can be obtained by using the obtained electric wire terminal structure 20. First, a predetermined length of insulating coating is stripped from the tip of the core portion 7 to expose the internal conductor, which can then be crimped onto a crimp terminal to connect the terminal and the core portion 7.

[0044] 2(b) is a cross-sectional view showing a connector structure 21 in which a terminal-attached electric wire having an electric wire termination structure 20 is accommodated in a connector 17. A metal member 19 is disposed on the inner surface of the terminal insertion portion of the connector 17. The metal member 19 is, for example, cylindrical, and has a shape that roughly corresponds to the outer shape of the outer ferrule 13 after crimping.

[0045] Terminal 15 is arranged at the tip side of connector 17, and by inserting another terminal to be connected, the terminals can be electrically connected to each other. Meanwhile, inside connector 17, outer ferrule 13 comes into contact with metal member 19 and becomes conductive. That is, braided wire 5 of shielded wire 1 and metal member 19 become conductive. Metal member 19 is connected to a grounding wire (not shown), so the shield layer (braided wire 5) of shielded wire 1 can be grounded.

[0046] The expanded diameter height of the expanded diameter portion 11 of the inner ferrule 9 after crimping (the difference between the outer diameter of the expanded diameter portion 11 and the outer diameter of the portion other than the expanded diameter portion 11 / 2) can be made equal to the thickness of the outer ferrule 13. By doing so, it is also possible to bring both the expanded diameter portion 11 of the inner ferrule 9 and the outer surface of the outer ferrule 13 into direct contact with the metal member 19.

[0047] As described above, according to this embodiment, by folding the braided wire 5 twice, a compact electric wire termination structure 20 can be formed without cutting the braided wire 5. Furthermore, by bringing the inner ferrule 9 and the outer ferrule 13 into direct contact with each other, the reliability of the electrical connection can be improved. For example, in addition to the route that connects the braided wire 5 to the metal member 19 via the outer ferrule 13, it is also possible to connect the braided wire 5 to the metal member 19 via the inner ferrule 9 and the outer ferrule 13. Note that although the inner ferrule 9 and the outer ferrule 13 are tubular metal members in the above example, their surfaces may be plated.

[0048] Furthermore, forming the expanded diameter portion 11 in the inner ferrule 9 makes it easier to determine the folding position of the braided wire 5 and the positioning of the outer ferrule 13. In particular, since the inner ferrule 9 is covered by the braided wire 5, it is difficult to determine the position of the inner ferrule 9. However, since a portion of the inner ferrule 9 is exposed to the outside, it is possible to prevent the inner ferrule 9 and the outer ferrule 13 from being misaligned and crimped together.

[0049] Next, a second embodiment will be described. Fig. 3(a) is a diagram showing a process for forming an electric wire terminal structure using an inner ferrule 9a. In the following description, components that have the same functions as those in the first embodiment will be given the same reference numerals as in Figs. 1 and 2, and redundant description will be omitted.

[0050] The second embodiment is substantially similar to the first embodiment, but differs in the shape of the expanded diameter portion 11 of the inner ferrule 9a. The expanded diameter portion 11 at the tip of the inner ferrule 9a is formed so as to be folded back rearward, forming an insertion portion 23 into which the end of the outer ferrule 13 can be inserted. In other words, the insertion portion 23 is formed so that the end of the inner ferrule 9a is folded back rearward with a gap therebetween.

[0051] After the braided wire 5 is folded back again onto the outer periphery of the inner ferrule 9a, the end of the outer ferrule 13 is inserted into the insertion portion 23 as shown in Fig. 3(a). In this state, the outer ferrule 13 and the inner ferrule 9a are crimped together by compressing them from the periphery as shown in Fig. 3(b). In this way, the electric wire terminal structure 20a can be formed.

[0052] According to the second embodiment, it is possible to obtain the same effects as those of the first embodiment. Furthermore, since the insertion portion 23 into which the end of the outer ferrule 13 can be inserted is formed at the end of the inner ferrule 9a, it is easy to position the outer ferrule 13. Furthermore, by inserting the outer ferrule 13 into the insertion portion 23, it is possible to more reliably bring the inner ferrule 9a and the outer ferrule 13 into contact with each other.

[0053] Furthermore, by forming the insertion portion 23, when the outer ferrule 13 and the inner ferrule 9a are crimped together at the insertion portion 23, a part of the inner ferrule 9a is exposed on the outer peripheral surface of the crimped portion. Therefore, as described above, when accommodated in the connector 17, both the outer ferrule 13 and the inner ferrule 9 can be brought into contact with the metal member 19.

[0054] In addition, as long as the insertion portion 23 can accommodate the end of the outer ferrule 13, a groove for inserting the outer ferrule 13 may be formed on the side of the expanded diameter portion 11 rather than by folding back the end of the inner ferrule 9a.

[0055] Next, a third embodiment will be described. Fig. 4(a) is a diagram showing a process for forming an electric wire terminal structure using an inner ferrule 9a and an outer ferrule 13a. The third embodiment is substantially the same as the second embodiment, but the shape of the end of the outer ferrule 13a is different.

[0056] As described above, the inner ferrule 9a has the expanded diameter portion 11 at its end folded back backward to form the insertion portion 23. Meanwhile, the tip end of the outer ferrule 13 is formed with an outer shape that corresponds to the inner shape of the insertion portion 23 of the inner ferrule 9a. That is, the end of the outer ferrule 13a also has a shape that is folded back backward. More specifically, the ends of the inner ferrule 9a and the outer ferrule 13a both have tapered shapes such that the outer diameter gradually increases from the tip (that is, the internal space gradually increases).

[0057] 4(b), when the outer ferrule 13a is slid from the rear and positioned on the outer periphery of the inner ferrule 9a (braided wire 5), the tip of the outer ferrule 13a is fully inserted into the insertion portion 23. At this time, the inner surface of the insertion portion 23 (inner ferrule 9a) and the outer surface of the outer ferrule 13a come into surface contact. This ensures that the inner ferrule 9a and the outer ferrule 13a come into reliable contact and are electrically connected.

[0058] 5(a), an electric wire terminal structure 20b can be obtained by crimping an inner ferrule 9a and an outer ferrule 13a. In this case, as shown in the figure, the maximum outer diameter portion of the outer peripheral surface of the crimped portion may be only the inner ferrule 9a.

[0059] 5(b) is a cross-sectional view showing a connector structure 21a using the electric wire terminal structure 20b. In this case, only the inner ferrule 9a comes into contact with the metal member 19.

[0060] According to the third embodiment, it is possible to obtain the same effects as those of the second embodiment. Furthermore, by making the shape of the end of the outer ferrule 13a correspond to the shape of the end of the inner ferrule 9a, it is possible to more reliably bring the inner ferrule 9a and the outer ferrule 13a into contact with each other.

[0061] Since the inner and outer surfaces of the inner ferrule 9a come into contact with the braided wire 5, higher connection reliability can be expected by bringing the inner ferrule 9a into direct contact with the metal member 19. Thus, according to the first to third embodiments, the contact with the metal member 19 may be only the outer ferrule, only the inner ferrule, or both the inner ferrule and the outer ferrule.

[0062] In the above-described embodiments, the outer periphery of the outer ferrule is compressed and crimped at the end, but crimping is not necessarily required. Fig. 6 is a diagram showing a process for forming an electric wire terminal structure when, for example, an inner ferrule 9b and an outer ferrule 13b are used.

[0063] 6(a), the inner ferrule 9b has substantially the same shape as the inner ferrule 9a, but the inner surface of the inner ferrule 9b (insertion portion 23) is formed with a convex portion 25 that protrudes toward the inner surface. Meanwhile, the outer surface of the tip portion of the outer ferrule 13b is formed with a concave portion 27 at a position corresponding to the convex portion 25.

[0064] 6(b), when the end of the outer ferrule 13b is completely inserted into the insertion portion 23 of the inner ferrule 9b, it is possible to fit the convex portion 25 into the concave portion 27. By fitting the convex portion 25 into the concave portion 27 in this way, the inner ferrule 9b and the outer ferrule 13b are fixed together.

[0065] In this embodiment, an example will be described in which a convex portion 25 is formed on the inner surface of the inner ferrule 9b (insertion portion 23) and a concave portion 27 is formed on the outer surface of the tip portion of the outer ferrule 13a, but the convex portion 25 and the concave portion 27 may be reversed. That is, it is sufficient that a concave portion or a convex portion is formed on the inner surface of the inner ferrule 9b (insertion portion 23) and a convex portion or a concave portion that can fit into the concave portion or convex portion of the inner ferrule 9b is formed on the outer surface of the tip portion of the outer ferrule 13b.

[0066] As shown in FIG. 7( a), by inserting the inner ferrule 9b into the connector 17 in this state without crimping, the outer peripheral surface of the inner ferrule 9b can come into contact with the metal member 19. At this time, a space is formed between the inner ferrule 9b and the outer ferrule 13b, allowing the inner ferrule 9b and the outer ferrule 13b to deform toward the center. Therefore, by making the outer diameter of the inner ferrule 9b on the outer peripheral side slightly larger than the inner diameter of the metal member 19, the inner ferrule 9b is pressed against the metal member 19 by spring force and comes into contact with it. This ensures reliable contact between the inner ferrule 9b and the metal member 19. In this way, by exposing at least a portion of the inner ferrule to the outer peripheral surface of the terminal structure, the inner ferrule can come into direct contact with the metal member 19.

[0067] Alternatively, the inner ferrule 9b and the outer ferrule 13b may be crimped while retaining their spring force. For example, a spacer may be placed in the space at the end of the outer ferrule 13b before crimping, and the spacer may be removed after crimping.

[0068] As another method for using a spring force to bring the inner ferrule (or outer ferrule) and the metal member 19 into contact with each other, a spring portion 29 may be provided on the metal member 19, as shown in Fig. 7(b). The spring portion 29 is an elastically deformable portion that protrudes inward. By making the inner diameter of the spring portion 29 slightly smaller than the maximum outer diameter of the terminal structure, when the terminal structure is accommodated in the connector 17, the spring portion 29 can be elastically deformed and pressed against the inner ferrule or outer ferrule.

[0069] In this way, by forming a spring portion that can be reduced in diameter in the electric wire terminal structure or by forming a spring portion 29 that can be expanded in diameter in the metal member 19, the inner ferrule or the outer ferrule can be brought into contact with the metal member 19 by spring force. This makes it possible to more reliably improve the reliability of the electrical connection between the metal member 19 and the braided wire 5.

[0070] Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical scope of the present invention is not limited to the above-described embodiments. It is clear that those skilled in the art can conceive of various modifications and alterations within the scope of the technical ideas described in the claims, and it is understood that these modifications and alterations also fall within the technical scope of the present invention. [Explanation of symbols]

[0071] 1...Shielded wire 3……Outer cover 5……braided wire 7...Core part 9, 9a, 9b...Inner ferrule 11……Expanded diameter part 13, 13a, 13b...Outer ferrule 15...Terminal 17...Connector 19...Metal parts 20, 20a, 20b... Wire terminal structure 21, 21a, 21b, 21c...Connector structure 23...insertion part 25....Convex part 27...Concave 29...Spring section 100...Shielded wire 103……Outer cover 105……braided wire 107...Core part 109………Inner ferrule 113...Outer ferrule

Claims

1. A terminal structure of a shielded electric wire having a core portion in which a conductor is insulated, a braided wire arranged on the outer periphery of the core portion, and an outer sheath that covers the outer periphery of the braided wire, The braided wire is exposed by peeling off a predetermined length of the outer covering, and is folded back in a direction opposite to the end side of the shielded electric wire, and an inner ferrule is disposed around the braided wire, the braided wire is folded back again toward the end of the shielded wire so as to cover the outer periphery of the inner ferrule, an outer ferrule is disposed around the outer periphery of the braided wire, and the inner ferrule and the outer ferrule are crimped together with the braided wire sandwiched therebetween, 1. A terminal structure for a shielded electric wire, wherein one end side of the inner ferrule is expanded in diameter and is in direct contact with the end side of the outer ferrule.

2. 2. The shielded wire terminal structure according to claim 1, wherein the tip of the inner ferrule has an insertion portion into which the end of the outer ferrule can be inserted, and the end of the outer ferrule is inserted into the insertion portion.

3. the insertion portion is formed such that an end portion of the inner ferrule is folded back toward the rear side with a gap therebetween, 3. The shielded wire terminal structure according to claim 2, wherein the tip of the outer ferrule has an outer shape corresponding to the inner shape of the insertion portion, and the tip of the outer ferrule is in surface contact with the inner surface of the insertion portion.

4. A recess or a protrusion is formed on the inner surface of the insertion portion, 4. The shielded wire terminal structure according to claim 3, wherein a convex or concave portion that can be fitted into the concave or convex portion is formed on the outer surface of the tip of the outer ferrule.

5. 4. The shielded wire terminal structure according to claim 3, wherein the outer ferrule and the inner ferrule are crimped together at the insertion portion.

6. 6. The terminal structure of a shielded electric wire according to claim 3, wherein a part of the inner ferrule is exposed on an outer peripheral surface of the terminal structure.

7. A terminal-attached electric wire having the terminal structure of the shielded electric wire according to any one of claims 1 to 6, A terminal-attached electric wire, characterized in that a predetermined length of the insulating coating is stripped from the tip of the core portion, and the conductor inside is connected to a terminal.

8. A connector structure in which the terminal-attached electric wire according to claim 7 is accommodated in a connector, a metal member is disposed on an inner surface of the terminal insertion portion of the connector; A connector structure characterized in that the braided wire and the metal member are electrically connected.

9. 9. The connector structure according to claim 8, wherein the metal member is in direct contact with the inner ferrule.

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