Crimping structure of electric wire and outer conductor

Abstract

The crimped section (25) of the outer conductor (23) has: a first crimped section (31) that extends in one direction in the circumferential direction from the substrate section (30) and surrounds the shielded wire (11); a second crimped section (36) that extends in the other direction in the circumferential direction from a portion of the substrate section (30) that is further forward than the first crimped section (31), and that surrounds the shielded wire (11); a first locking part (34) that is provided so that the tip of the first tightening part (31) is folded back inward; a second locking part (39) that is provided so that the tip of the second tightening part (36) is folded back inward; and a restriction section (46) extending in a cantilevered manner toward the rear in the axial direction of the shielded wire (11). The second locking portion (39) faces an end edge of the restricting portion (46) on one side in the circumferential direction. The first locking part (34) faces the end edge of the restriction part (46) on the other circumferential direction side behind the second locking part (39) in the axial direction, and the width dimension (W1) of a first portion (46A) of the restriction part (46), which faces the first locking part (34), is smaller than the width dimension (W2) of a second portion (46B) of the restriction part (46), which faces the second locking part (39).

Description

Technical Field

[0001] The invention relates to a crimping structure for an electric wire and an outer conductor. Background Art

[0002] Patent document 1 discloses a crimping structure for an electric wire, which is fastened to the terminal portion of a shielded electric wire by a rectangular limiting portion provided on a lower shell and a first tightening portion and a second tightening portion provided on an upper shell. In this structure, even if the terminal is pulled in the axial direction of the cable, the crimping portion can be prevented from opening in the circumferential direction. Prior art literature Patent Literature

[0003] Patent Document 1: Japanese Patent Application Publication No. 2019-29204 Summary of the invention Problems to be solved by the invention

[0004] In the crimping structure of Patent Document 1, when the crimping portion is tightened, the timing at which the base end of the first tightening portion or the second tightening portion contacts the two circumferential ends of the limiting portion is sometimes staggered, so that the limiting portion tilts in the circumferential direction. If the limiting portion tilts in the circumferential direction in a direction away from the base end of the tightening portion located at the top of the limiting portion, there is a concern that the locking portion of the tightening portion may step over the limiting portion and fail to lock. It can be considered as follows: by eliminating the gap between the crimping portion and the jig on which the crimping portion is placed when the crimping portion is tightened, the play of the crimping portion relative to the jig can be suppressed, thereby eliminating the inclination of the limiting portion. However, considering the dimensional deviation of the components, it is unrealistic to eliminate the gap, so it is difficult to completely suppress the inclination of the limiting portion. Therefore, it is desired to have a method for reliably locking the locking portion of the tightening portion to the limiting portion even if the limiting portion is tilted.

[0005] The present invention has been accomplished based on the above-mentioned circumstances, and an object of the present invention is to prevent the crimping portion from opening. Solutions to Solve Problems

[0006] The crimping structure of the electric wire and the outer conductor of the present invention, The invention is provided with an open cylindrical crimping portion, the crimping portion being provided on an outer conductor connected to an end of the electric wire and crimped to the outer periphery of the electric wire, The crimping portion has: a substrate portion arranged along the outer circumference of the electric wire; a first tightening portion extending in a cantilevered manner from the base portion toward one direction in the circumferential direction of the electric wire so as to tighten the electric wire in a manner of surrounding the outer circumference thereof; a second tightening portion extending in a cantilevered manner from a portion of the substrate portion that is forward of the first tightening portion in the other direction of the circumferential direction so as to tighten the outer circumference of the electric wire; a first locking portion, which is provided by folding the circumferential top end of the first tightening portion inwardly; a second locking portion provided by folding the circumferential tip of the second tightening portion inwardly; and The limiting portion extends in a cantilevered manner along the outer periphery of the electric wire toward the rear in the axial direction of the electric wire and is covered by the first tightening portion and the second tightening portion. The second locking portion and the end edge of the restricting portion on the one side in the circumferential direction are opposed to each other in the circumferential direction. The first locking portion is located rearward of the second locking portion in the axial direction and faces an end edge of the restricting portion on the other side in the circumferential direction in the circumferential direction. A width dimension in the circumferential direction of a first portion of the restricting portion that faces the first locking portion is set smaller than a width dimension in the circumferential direction of a second portion of the restricting portion that faces the second locking portion. Effects of the Invention

[0007] According to the present invention, the opening of the crimping portion can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a perspective view of the shielded conductive path according to the first embodiment. Figure 2 This is a plan cross-sectional view of the shield conductive path according to the first embodiment. Figure 3 This is a perspective view of the upper case of Embodiment 1. Figure 4 This is a rear view of the upper shell of embodiment 1. Figure 5 yes Figure 2 AA section view in. Figure 6 This is a perspective view of the lower case of embodiment 1. Figure 7 This is a main part plan view showing an enlarged restricting portion of the lower case of Embodiment 1. Figure 8 It is a main part plan view showing an enlarged view of a crimped portion to be crimped. Fig. 9 It is a main part plan view showing, in an enlarged manner, a crimped portion crimped in a state where the restricting portion is inclined. DETAILED DESCRIPTION

[0009] [Description of Embodiments of the Invention] First, embodiments of the present invention will be described by way of examples. The crimping structure of the electric wire and the outer conductor of the present invention, (1) A crimping part having an open cylindrical shape is provided on an outer conductor connected to an end of an electric wire and crimped to the outer periphery of the electric wire. The crimping part comprises a substrate part, a first tightening part, a second tightening part, a first stopper part, a second stopper part and a limiting part. The substrate part is arranged along the outer periphery of the electric wire. The first tightening part extends in a cantilevered manner from the substrate part to one direction of the circumference of the electric wire and is tightened in a manner of surrounding the outer periphery of the electric wire. The second tightening part extends in a cantilevered manner from a position of the substrate part that is closer to the front of the first tightening part to another direction of the circumference and is tightened in a manner of surrounding the outer periphery of the electric wire. The first stopper part is provided by folding back the circumferential top end of the first tightening part inward. The second stopper part is provided by folding back the circumferential top end of the second tightening part inward. The limiting part verifies that the outer periphery of the electric wire extends in a cantilevered manner toward the rear in the axial direction of the electric wire and is covered by the first tightening part and the second tightening part. The second stopper is circumferentially opposed to the end edge of the limiting portion on one direction side in the circumferential direction. The first stopper is located behind the second stopper in the axial direction and is circumferentially opposed to the end edge of the limiting portion on the other direction side in the circumferential direction. The circumferential width dimension of the first portion of the limiting portion that is opposed to the first stopper is set to be smaller than the circumferential width dimension of the second portion of the limiting portion that is opposed to the second stopper.

[0010] According to this configuration, the displacement amount of the restricting portion is larger at the rear side than at the front side. According to the present invention, the circumferential width dimension of the first portion of the restricting portion that is opposite to the first stop portion is set smaller than the circumferential width dimension of the second portion of the restricting portion that is opposite to the second stop portion. Therefore, even if the rear end of the restricting portion whose displacement amount is larger than the front end is inclined in a direction close to the first stop portion, the first stop portion can be prevented from stepping over the restricting portion and failing to stop.

[0011] (2) Preferably, in the circumferential direction, the end edge of the first portion on the side opposite to the first locking portion is arranged in a stepped shape relative to the end edge of the second portion on the side opposite to the first locking portion so as to approach the end edge on the side opposite to the second locking portion. According to this configuration, by forming the second portion and the first portion in a simple step-like configuration, even if the limiting portion is inclined in a direction approaching the first locking portion, it is possible to prevent the first locking portion from stepping over the limiting portion and failing to be locked.

[0012] (3) In (2), preferably, the width dimension of the first portion in the circumferential direction is larger than 1 / 2 of the width dimension of the second portion in the circumferential direction. According to this configuration, the strength of the first portion can be ensured, and deformation of this portion can be prevented.

[0013] (4) Preferably, the rear end of the first portion protrudes rearward from the first locking portion. According to this configuration, the first locking portion can be opposed to the edge of the first portion over the entire axial direction, so the first locking portion can be reliably locked to the first portion.

[0014] (5) Preferably, the size of the first stopper is smaller than the size of the second stopper in the circumferential direction. According to this configuration, the size between the first stopper and the first portion in the circumferential direction can be made larger than the size between the second stopper and the second portion in the circumferential direction. Therefore, even if the limiting portion is inclined in a direction approaching the first stopper, the first stopper can be prevented from stepping over the limiting portion and failing to be locked.

[0015] [Implementation Method 1] Reference Figures 1 to 9 Embodiment 1 which embodies the present invention will be described. In the figure, "front side", "rear side", "upper side", "lower side", "right side" and "left side" are represented by "F", "B", "U", "D", "R" and "L", respectively. In addition, the circumferential direction in the present embodiment 1 includes two directions, the clockwise direction and the counterclockwise direction around the axis when the shielded electric wire 11 is viewed from the rear in the axial direction.

[0016] The crimping structure of the electric wire and the outer conductor of the first embodiment is suitable for shielding the conductive path 10. Figure 1 As shown in FIG. 1 , the shielded conductive path 10 is a form in which a shield terminal 20 is fixedly attached to the front end portion of a shielded electric wire 11 as an electric wire. Figure 2 As shown, the shielded electric wire 11 has a plurality of (two in the first embodiment) covered electric wires 12 embedded in an insulator 15 having a circular cross section, and the outer periphery of the insulator 15 is surrounded by a cylindrical shield layer 16 composed of a braided wire, and the shield layer 16 is surrounded by a cylindrical sheath 17. At the front end of the shielded electric wire 11, the sheath 17 and the insulator 15 are removed, and the plurality of covered electric wires 12 are exposed in a state that they can be bent separately. At the front end of each covered electric wire 12, the insulating coating 13 is removed, and the front end of the core wire 14 is exposed.

[0017] A sleeve 18 is fastened to the outer peripheral surface of the front end of the sheath 17. The front end of the shield layer 16 is folded back behind the exposed area of ​​the core wire 14, and the outer periphery of the sheath 17 and the sleeve 18 is covered by the folded-back shield layer 16. The area of ​​the shielded electric wire 11 where the sleeve 18 is fastened is defined as a shield connection end 19.

[0018] The shield terminal 20 includes an inner conductor 21 connected to the front end of each core wire 14 of the covered electric wire 12, a dielectric body 22 accommodating the plurality of inner conductors 21, and an outer conductor 23 mounted on the dielectric body 22 in a state of surrounding the outer circumference of the dielectric body 22. That is, the outer conductor 23 is connected to the end of the shielded electric wire 11.

[0019] The outer conductor 23 includes a shell body 24 and a crimping portion 25 connected to the rear end of the shell body 24 (see Figure 1). That is, the crimping portion 25 is provided on the outer conductor 23. The crimping portion 25 is crimped to the outer periphery of the shield layer 16 of the shielded electric wire 11. The outer conductor 23 is formed by combining an upper shell 26 formed by bending a metal plate and a lower shell 42 formed by bending a metal plate.

[0020] like Figure 3 , 4 As shown, the upper case 26 is a single component having an upper body 27 constituting the case body 24, a base plate 30, a first tightening portion 31, and a second tightening portion 36. The upper body 27 has a bottom plate 28 and a pair of side plates 29 extending upward from left and right side edges of the bottom plate 28.

[0021] The base plate portion 30, the first tightening portion 31, and the second tightening portion 36 are components of the crimping portion 25. That is, the crimping portion 25 includes the base plate portion 30, the first tightening portion 31, and the second tightening portion 36. The base plate portion 30 is in a state extending backward from the rear end edge of the bottom plate portion 28, and when the crimping portion 25 is viewed from the rear, it forms an arched shape that is curved in a manner that the left and right central portions bulge downward (see FIG. 2 ). Figure 4 ) That is, the crimping portion 25 is in the shape of an open cylinder.

[0022] In the state before the crimping portion 25 is crimped to the shielded wire 11, the first tightening portion 31 is in the form of a flat plate extending from the left edge of the base portion 30 to the upper left obliquely. The extending direction of the first tightening portion 31 is the circumferential direction surrounding the shielded wire 11 in the state where the crimping portion 25 is crimped (refer to Figure 5 In other words, the first tightening portion 31 extends from the base portion 30 in a cantilevered manner in one direction of the circumference of the shielded electric wire 11 , and tightens the shielded electric wire 11 so as to surround the outer circumference thereof.

[0023] like Figure 3 As shown, the first tightening portion 31 has a pair of first extension portions 33 extending from the front end and the rear end of the substrate portion 30 in a cantilevered manner and in a coplanar manner with the substrate portion 30. The width dimension of one first extension portion 33 (the dimension in the axial direction of the shielded wire 11) is smaller than the width dimension of the substrate portion 30. Each first extension portion 33 is rectangular. The extension dimension of each first extension portion 33 extending from the substrate portion 30 (the circumferential dimension orthogonal to the axis of the shielded wire 11) is a rectangle that is longer than the width dimension. The positions of the extension top ends of the pair of first extension portions 33 are consistent (refer to Figure 4 ).

[0024] The first locking portions 34 are provided at the extended tip portions of the pair of first extending portions 33. The first locking portions 34 are formed by bending the circumferential tip portions of the first extending portions 33 of the first tightening portion 31 inward (toward the axis of the shielded electric wire 11) (see Figure 5). The first locking portion 34 is formed to extend over the entire width of the first extension portion 33, and protrudes inward from the inner surface of the first extension portion 33 by an amount equivalent to the plate thickness of the first locking portion 34. The extended top end surface of the first locking portion 34 becomes the first locking surface 35 facing the substrate portion 30. In a state before the crimping portion 25 is crimped onto the shielded wire 11, the dimension of the extension direction of the first locking portion 34 on the rear side is formed to be smaller than the dimension of the extension direction of the first locking portion 34 on the front side. Furthermore, the first locking surface 35 of the first locking portion 34 on the rear side is arranged at a position closer to the base end in the extension direction than the first locking surface 35 of the first locking portion 34 on the front side (refer to Figure 4 ).

[0025] In the state before the crimping portion 25 is crimped to the shielded wire 11, the second tightening portion 36 is in the form of a flat plate extending from the right edge of the base portion 30 to the upper right. The extending direction of the second tightening portion 36 is the circumferential direction surrounding the shielded wire 11 in the state where the crimping portion 25 is crimped (see Figure 5 In other words, the second tightening portion 36 extends in a cantilevered manner from a position forward of the first tightening portion 31 on the rear side of the substrate portion 30 in the other circumferential direction to tighten the shielded wire 11 in a manner surrounding the outer periphery (see Figure 8 , 9 ). When the crimping portion 25 is crimped, the extending direction of the second tightening portion 36 is opposite to the extending direction of the first tightening portion 31 (see Figure 5 That is, when the crimping portion 25 is viewed from the rear in the axial direction of the shielded wire 11, the first tightening portion 31 extends from the substrate portion 30 in the clockwise direction, while the second tightening portion 36 extends from the substrate portion 30 in the counterclockwise direction (see Figure 5 ).

[0026] The second tightening portion 36 has a second extension portion 38 extending in a cantilevered manner from the center portion in the front-to-back direction of the right end edge of the substrate portion 30. The width dimension of the second extension portion 38 (the dimension in the axial direction of the shielded wire 11) is smaller than the width dimension of the substrate portion 30. The second extension portion 38 is rectangular. The second extension portion 38 is a rectangle in which the extension dimension extending from the substrate portion 30 is longer than the width dimension. The width dimension of the second extension portion 38 is set to be slightly smaller than the distance between the pair of first extension portions 33 (refer to Figure 8 , 9 ). The width dimension of the second extending portion 38 is equal to the sum of the width dimensions of the pair of first extending portions 33 .

[0027] A second locking portion 39 is provided at the extended end of the second extension portion 38. The second locking portion 39 is formed by bending the circumferential top end portion of the second extension portion 38 of the second tightening portion 36 inward (toward the axis of the shielded wire 11). The second locking portion 39 is formed over the entire width of the second extension portion 38 and protrudes inward from the inner surface of the second extension portion 38 by an amount equivalent to the plate thickness of the second locking portion 39. The extended top end surface of the second locking portion 39 becomes the second locking surface 40 facing the substrate portion 30. In the circumferential direction, the size of the first locking portion 34 on the rear side is formed to be smaller than the size of the second locking portion 39 (refer to Figure 5 The first locking portion 34 and the second locking portion 39 are components of the crimping portion 25. That is, the crimping portion 25 includes the first locking portion 34 and the second locking portion 39.

[0028] A plurality of (six in the first embodiment) engaging projections 41 (see Figure 4 The engaging protrusion 41 is formed by bending a portion of the rear end edge of the crimping portion 25 inward (toward the axis of the shielded electric wire 11 ).

[0029] like Figure 6 As shown, the lower shell 42 is a single component having a lower main body portion 43 and a limiting portion 46 constituting the shell main body portion 24. The lower main body portion 43 has a plate-like upper surface portion 44, a pair of plate-like side portions 45 extending downward from the left and right side edges of the upper surface portion 44, and a pair of plate-like bottom surface portions 47 extending from the lower end edges of each side portion 45 toward the inner side in the left and right directions. The limiting portion 46 is a cantilever-shaped portion extending backward from the rear end edge of the upper surface portion 44. The limiting portion 46 is a component of the crimping portion 25. That is, the crimping portion 25 has the limiting portion 46.

[0030] like Figure 7 As shown, the limiting portion 46 has a first portion 46A and a second portion 46B located in front of the first portion 46A. The circumferential width dimension W1 of the first portion 46A is set smaller than the circumferential width dimension W2 of the second portion 46B. In addition, the circumferential width dimension W1 of the first portion 46A is greater than 1 / 2 of the circumferential width dimension W2 of the second portion 46B. The top view shape of the limiting portion 46 is formed in a stepped shape with a portion of the rear side cut off. The portion where the right end edge and the rear end edge of the second portion 46B intersect is connected by a curved surface K. The right end edge and the rear end edge of the first portion 46A are not connected via a curved surface.

[0031] Next, the assembly of the shield conductive path 10 will be described. The upper body portion 27 and the lower body portion 43 are combined so as to sandwich the dielectric body 22 from above and below to form a square tube-shaped shell body portion 24 (see Figure 1The shell body 24 accommodates the inner conductor 21, the entire dielectric body 22, and the exposed area of ​​the covered wire 12 (see Figure 2 ). When the outer conductor 23 and the shielded wire 11 are not crimped, the crimping portion 25 connected to the rear end of the shell body 24 is located at a position where the substrate portion 30 and the limiting portion 46 are vertically opposed, and the shield connection end portion 19 is arranged between the substrate portion 30 and the limiting portion 46 (refer to Figure 5 ).

[0032] In this state, the crimping portion 25 and the shield connection end portion 19 are placed in a crimping machine (not shown) for crimping. In the crimping process, the crimping portion 25 and the shield connection end portion 19 are clamped from the top and bottom by the crimping tool and the anvil, and the crimping portion 25 is plastically deformed to surround the shield connection end portion 19 while reducing its diameter. At this time, the substrate portion 30 is plastically deformed along the outer periphery of the shielded wire 11 (see Figure 5 ).

[0033] Then, the two first extension portions 33 and the one second extension portion 38 are pressed against the outer surface of the restriction portion 46 while being plastically deformed. At this time, the second extension portion 38 is fitted between the two first extension portions 33 (see Figure 8 ). In addition, the pair of first stopper portions 34 are located to the right of the limiting portion 46, and the first stopper surface 35 and the right side surface of the limiting portion 46 are separated and opposed to each other (see Figure 8 ). In addition, the second stopper 39 is located to the left of the limiting portion 46, and the second stopper surface 40 and the left side surface of the limiting portion 46 are separated and opposed to each other (see Figure 8 ).

[0034] Then, when the crimper and the anvil release the crimping portion 25 , the first tightening portion 31 and the second tightening portion 36 elastically return in the diameter expansion direction by rebounding, and the restricting portion 46 elastically returns radially outward by rebounding.

[0035] When the first tightening portion 31 elastically recovers in the direction of the expansion, the first stopper 34 on the rear side is displaced in the axial direction closer to the right side (the other circumferential side) of the limiting portion 46 than the second stopper 39, and is displaced radially outward. At this time, the limiting portion 46 is displaced radially outward by rebounding while maintaining contact with the inner surface of the first extension portion 33. In addition, the first stopper surface 35 of the first stopper 34 on the rear side is opposed to the right side end edge (the other circumferential side) of the first portion 46A of the limiting portion 46 from the right side (the other circumferential side). That is, the first stopper surface 35 of the first stopper 34 is opposed to the right side end edge of the first portion 46A in the limiting portion 46.

[0036] When the second tightening portion 36 elastically recovers in the direction of the expansion, the second stopper 39 is displaced from the left to approach the limiting portion 46 and simultaneously displaced radially outward. At this time, the limiting portion 46 is displaced radially outward by rebounding while maintaining contact with the inner surface of the second extension portion 38. In addition, the second stopper surface 40 of the second stopper 39 is opposed to the end edge on the left side (the end edge on the circumferential one direction side) of the second portion 46B of the limiting portion 46 from the left (from the circumferential one direction side). That is, the second stopper surface 40 of the second stopper 39 is opposed to the end edge on the left side of the second portion 46B of the limiting portion 46.

[0037] The limiting portion 46 is cantilevered and extends from the rear end of the shell body portion 24 toward the rear in the axial direction of the shielded wire 11 along the outer periphery of the shielded wire 11, and is covered by the first extension portion 33 of the first tightening portion 31 and the second extension portion 38 of the second tightening portion 36 (see Figure 8 At this time, the circumferential dimension of the first stopper 34 on the rear side is formed to be smaller than the circumferential dimension of the first stopper 34 on the front side and the circumferential dimension of the second stopper 39. In this way, the first stopper 34 and the second stopper 39 are opposed to the limiting portion 46 from both sides in the circumferential direction, thereby limiting the expansion deformation of the crimping portion 25.

[0038] When the crimping portion 25 is crimped, the engaging protrusion 41 engages with the outer periphery of the sheath 17 at a position immediately behind the sleeve 18 (see Figure 2 ) Since the engaging protrusion 41 engages with the sheath 17 , the crimping portion 25 is restricted from relative displacement in the circumferential direction and relative displacement in the axial direction with respect to the shielded electric wire 11 .

[0039] like Figure 8 As shown in the figure, in the state where the crimping portion 25 is crimped, the limiting portion 46 is covered by the first tightening portion 31 (first extension portion 33) and the second tightening portion 36 (second extension portion 38). The rear end portion of the first portion 46A of the limiting portion 46 is in a state of protruding slightly rearward from the first stopper 34 of the first tightening portion 31. The outer surface of the limiting portion 46 is arranged in contact with the inner circumference of the first tightening portion 31 (first extension portion 33) and the inner circumference of the second tightening portion 36 (second extension portion 38). A pair of first stopper portions 34 and a second stopper portion 39 are arranged alternately in the axial direction (front-rear direction) of the shielded electric wire 11. The extension direction of the first extension portion 33 and the extension direction of the second extension portion 38 in the circumferential direction are opposite to each other, and the first stopper portion 34 and the second stopper portion 39 are arranged on the limiting portion 46 in a manner of sandwiching the limiting portion 46 in the circumferential direction.

[0040] Here, the dimensions of the crimping machine for the portion where the crimping portion 25 and the shield connection end portion 19 are provided are set larger so that the crimping portion 25 and the shield connection end portion 19 of the maximum size can be provided within the dimensional tolerance. Therefore, when the crimping portion 25 and the shield connection end portion 19 are provided in the crimping machine, they may be provided slightly offset in the circumferential direction.

[0041] When the crimping process is performed in a state where the crimping portion 25 and the shield connection end portion 19 are slightly offset in the circumferential direction relative to the crimping machine, the timing at which the first extension portion 33 and the second extension portion 38 contact the restricting portion 46 may be offset. Due to this timing offset, the restricting portion 46 may tilt in the circumferential direction with its base end as a fulcrum.

[0042] For example, the two first extensions 33 come into contact with the restricting portion 46 before the second extension 38. In this case, the restricting portion 46 is pressed rightward by the first extension 33 and tilts toward the direction approaching the base end of the second extension 38 with the base end as a fulcrum (see Fig. 9 ). And, the crimping of the crimping portion 25 is completed in a state where the restricting portion 46 is inclined toward the direction approaching the base end of the second extending portion 38. The displacement amount of the restricting portion 46 inclined toward the base end of the second extending portion 38 increases from the front end toward the rear end.

[0043] Here, in the circumferential direction, the end edge of the first portion 46A on the side (right side) opposite to the first stopper 34 is arranged in a stepped shape with respect to the end edge of the second portion 46B on the side (left side) opposite to the first stopper 34 so as to be close to the end edge on the side opposite to the second stopper 39. In addition, in the circumferential direction, the size of the first stopper 34 of the first extension portion 33 on the rear side is set smaller than the size of the second stopper 39. Therefore, as Fig. 9 As shown, even if the restricting portion 46 is inclined toward the base end of the second extending portion 38 , the first locking surface 35 of the rear first locking portion 34 can be reliably opposed to the right edge of the first portion 46A of the restricting portion 46 .

[0044] Here, in the circumferential direction, the size of the first stopper 34 of the first extension 33 on the rear side is set to be the same as the size of the second stopper 39. Even if the length of the first extension 33 on the rear side is lengthened, it is considered that the same effect as described above can be achieved. However, when the crimping portion 25 having such a structure is crimped by a crimper and an anvil, the top end of the first extension 33 on the rear side collides with the edge of the substrate portion 30 connected to the base end of the second extension 38, and the first extension 33 may be bent. In addition, in order to avoid the bending of the first extension 33, if the substrate portion 30 connected to the base end of the second extension 38 is controlled to be away from the first extension 33 in the circumferential direction, the function of the crimping portion 25 to be crimped to the shielded electric wire 11 may be impaired. Therefore, it is preferable to set the size of the first stopper 34 of the first extension 33 on the rear side to be smaller than the size of the second stopper 39 in the circumferential direction.

[0045] Furthermore, in the crimping process, when the second extension portion 38 contacts the limiting portion 46 before the first extension portion 33, the limiting portion 46 is pressed to the left by the second extension portion 38, and is tilted in a direction approaching the base end of the first extension portion 33 with the base end as a fulcrum (not shown). The second portion 46B is arranged on the base end side of the limiting portion 46 relative to the first portion 46A. Therefore, the displacement amount of the second portion 46B in the direction approaching the base end of the first extension portion 33 can be smaller than the displacement amount of the first portion 46A in the direction approaching the base end of the first extension portion 33. Therefore, when the limiting portion 46 is tilted in a direction approaching the base end of the first extension portion 33, the second locking portion 39 does not ride on the outer surface of the second portion 46B.

[0046] Next, the operation of the first embodiment will be described.

[0047] The crimping structure of the electric wire and the outer conductor of the present invention includes an open cylindrical crimping portion 25, which is provided on the outer conductor 23 connected to the end of the shielded electric wire 11 and crimped to the outer periphery of the shielded electric wire 11. The crimping portion 25 includes a substrate portion 30, a first tightening portion 31, a second tightening portion 36, a first stopper portion 34, a second stopper portion 39, and a restricting portion 46. The substrate portion 30 is arranged along the outer periphery of the shielded electric wire 11. The first tightening portion 31 extends from the substrate portion 30 in a cantilevered manner in one direction of the circumference of the shielded electric wire 11, and is fastened in a manner of surrounding the outer periphery of the shielded electric wire 11. The second tightening portion 36 extends from a position of the substrate portion 30 in front of the first tightening portion 31 in a cantilevered manner in another direction of the circumference, and is fastened in a manner of surrounding the outer periphery of the shielded electric wire 11.

[0048] The first stopper 34 is provided by folding back the top end of the first tightening portion 31 in the circumferential direction. The second stopper 39 is provided by folding back the top end of the second tightening portion 36 in the circumferential direction. The limiting portion 46 extends in a cantilevered manner along the outer circumference of the shielded electric wire 11 toward the rear in the axial direction of the shielded electric wire 11, and is covered by the first tightening portion 31 and the second tightening portion 36. The second stopper 39 is circumferentially opposed to the end edge of the limiting portion 46 on one side in the circumferential direction. The first stopper 34 is circumferentially opposed to the end edge of the limiting portion 46 on the other side in the circumferential direction, which is located behind the second stopper 39 in the axial direction. The circumferential width dimension of the first portion 46A of the limiting portion 46 that is opposed to the first stopper 34 is set to be smaller than the circumferential width dimension of the second portion 46B of the limiting portion 46 that is opposed to the second stopper 39.

[0049] According to this configuration, the displacement amount of the restricting portion 46 is larger at the rear end than at the front side. According to the present invention, the circumferential width dimension of the first portion 46A of the restricting portion 46 that is opposite to the first locking portion 34 is set smaller than the circumferential width dimension of the second portion 46B of the restricting portion 46 that is opposite to the second locking portion 39. Therefore, even if the rear end of the restricting portion 46 that has a larger displacement amount than the front end is inclined in a direction approaching the first locking portion 34, it is possible to prevent the first locking portion 34 from stepping over the restricting portion 46 and failing to be locked.

[0050] In the circumferential direction, the end edge of the first portion 46A on the side opposite to the first locking portion 34 is arranged in a stepped shape in a manner close to the end edge on the side opposite to the second locking portion 39 relative to the end edge of the second portion 46B on the side opposite to the first locking portion 34. According to this configuration, by forming the second portion 46B and the first portion 46A in a stepped shape, even if the limiting portion 46 is inclined in a direction close to the first locking portion 34, it is possible to prevent the first locking portion 34 from stepping over the limiting portion 46 and failing to be locked.

[0051] The circumferential width dimension W1 of the first portion 46A is larger than 1 / 2 of the circumferential width dimension W2 of the second portion 46B. According to this configuration, the strength of the first portion 46A can be ensured, and deformation of this portion can be prevented.

[0052] The rear end of the first portion 46A protrudes rearward from the first locking portion 34. With this configuration, the first locking portion 34 can be opposed to the edge of the first portion 46A over the entire axial direction, so the first locking portion 34 can be securely locked to the first portion 46A.

[0053] In the circumferential direction, the size of the first stopper 34 is smaller than the size of the second stopper 39. According to this configuration, the size between the first stopper 34 and the first portion 46A in the circumferential direction can be made larger than the size between the second stopper 39 and the second portion 46B in the circumferential direction. Therefore, even if the restricting portion 46 is inclined in a direction approaching the first stopper 34, the first stopper 34 can be prevented from stepping over the restricting portion 46 and failing to be stopped.

[0054] <Other Implementation Methods> The present invention is not limited to the first embodiment described in the above description and drawings. The present invention is intended to include all modifications within the meaning and protection scope equivalent to the claims, and also includes the following embodiments. (1) Unlike the first embodiment, the formation range of the first locking portion in the axial direction may be only a part of the first extending portion. Also, the formation range of the second locking portion in the axial direction may be only a part of the second extending portion. (2) Different from the first embodiment, the number of the first locking portions and the second locking portions alternately arranged in the axial direction is set to a combination other than the first embodiment (for example, a combination of the first tightening portion and the second tightening portion as one, or a combination of a pair of first locking portions and a pair of second locking portions). (3) Different from the first embodiment, either a configuration in which the first locking portion on the rear side is shortened or a configuration in which the circumferential dimension of the first portion is reduced may be adopted. (4) Different from the first embodiment, the first tightening portion, the second tightening portion, and the regulating portion may be reversed in the left-right direction. Description of Reference Numerals

[0055] 10: Shielding conductive paths 11: Shielded wire (electrical wire) 12: Coated wire 13: Insulation coating 14: Core wire 15: Insulator 16: Shielding layer 17: Sheath 18: Sleeve 19: Shield connection end 20: Shield terminal 21: Inner conductor 22: Dielectric 23: Outer conductor 24: Shell body 25: Crimping part 26: Upper shell 27: Upper body part 28: Bottom plate 29: Side panel 30: Substrate part 31: The first tightening part 33: Extension 1 34: First stopper 35: The first stop surface 36: Second tightening part 38: Second extension 39: Second stopper 40: Second stop surface 41: Biting into protrusions 42: Lower shell 43: Lower body 44: Upper surface 45: Side face 46: Restriction Department 46A: Part 1 46B: Part 2 47: Bottom K: Surface W1: Width size W2: Width size

Claims

1. A crimping structure for an electric wire and an outer conductor, comprising an open cylindrical crimping portion, the crimping portion being provided on the outer conductor connected to the end of the electric wire and crimped to the outer periphery of the electric wire, The crimping portion has: a substrate portion arranged along the outer circumference of the electric wire; a first tightening portion extending in a cantilevered manner from the base portion toward one direction in the circumferential direction of the electric wire so as to tighten the electric wire in a manner of surrounding the outer circumference thereof; a second tightening portion extending in a cantilevered manner from a portion of the substrate portion that is forward of the first tightening portion in the other direction of the circumferential direction so as to tighten the outer circumference of the electric wire; a first locking portion, which is provided by folding the circumferential top end of the first tightening portion inwardly; a second locking portion provided by folding the circumferential tip of the second tightening portion inwardly; and The limiting portion extends in a cantilevered manner along the outer periphery of the electric wire toward the rear in the axial direction of the electric wire and is covered by the first tightening portion and the second tightening portion. The second locking portion and the end edge of the restricting portion on the one side in the circumferential direction are opposed to each other in the circumferential direction. The first locking portion is located rearward of the second locking portion in the axial direction and faces an end edge of the restricting portion on the other side in the circumferential direction in the circumferential direction. A width dimension in the circumferential direction of a first portion of the restricting portion that faces the first locking portion is set smaller than a width dimension in the circumferential direction of a second portion of the restricting portion that faces the second locking portion.

2. The crimping structure of the electric wire and the outer conductor according to claim 1, wherein: In the circumferential direction, the end edge of the first portion on the side facing the first locking portion is arranged in a stepped shape relative to the end edge of the second portion on the side facing the first locking portion so as to approach the end edge on the side facing the second locking portion.

3. The crimping structure of the electric wire and the outer conductor according to claim 2, wherein: The width dimension of the first portion in the circumferential direction is larger than 1 / 2 of the width dimension of the second portion in the circumferential direction.

4. The crimping structure of an electric wire and an outer conductor according to any one of claims 1 to 3, wherein: A rear end portion of the first portion protrudes rearward from the first locking portion.

5. The crimping structure of an electric wire and an outer conductor according to any one of claims 1 to 3, wherein: In the circumferential direction, a dimension of the first locking portion is smaller than a dimension of the second locking portion.

6. The crimping structure of the electric wire and the outer conductor according to claim 4, wherein: In the circumferential direction, a dimension of the first locking portion is smaller than a dimension of the second locking portion.

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