Crimping structure between wire and outer conductor

Abstract

To prevent an open in a crimp part.SOLUTION: A crimp structure of an electric wire and an outer conductor, comprises a crimp part 25 provided to an outer conductor 25. The crimp part 25 includes: a first caulking part 31 that is extended to one peripheral direction from a substrate part 30 and surrounds a shield electric wire 11; a second caulking part 36 that is extended to the other direction of a peripheral direction from a front side from the first caulking part 31 of the substrate part 30 and surrounds the shield electric wire 11; a first engagement part 34 that folds a tip end part of the first caulking part 31 to an inner direction; a second engagement part 39 that folds the tip end part of the second caulking part 36 to the inner direction; and a regulation part 46 that is extended to a rear direction of a shaft line direction of the shield electric wire 11 in a cantilever state. The second engagement part 39 is opposite to an edge end on one side of the peripheral direction of the regulation part 46. The first engagement part 34 is opposite to the end edge on the other side of the peripheral direction of the regulation part 46 in the rear side of the second engagement part 39 of a shaft direction, in which a width dimension W1 of a first portion 46A where the first engagement part 34 of the regulation part 46 is opposite is smaller than a width dimension W2 of a second portion 46B where the second engagement part 39 is opposite.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present disclosure relates to a crimping structure for an electric wire and an outer conductor. [Background technology]

[0002] Patent Document 1 discloses a crimping structure for electric wires in which a rectangular restricting portion provided on a lower shell and first and second crimping portions provided on an upper shell crimp the terminal portion of a shielded electric wire. This structure can prevent the crimping portion from opening in the circumferential direction even when the terminal is pulled in the axial direction of the cable. [Prior art documents] [Patent documents]

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

[0004] In the device disclosed in Patent Document 1, when the crimping portion is crimped, the timing at which the base ends of the first and second crimping portions contact the circumferential edges of the restricting portion may be shifted, resulting in the restricting portion being tilted in the circumferential direction. If the restricting portion is tilted in the circumferential direction away from the base end of the crimping portion located at the tip of the restricting portion, there is a concern that the locking portion of the crimping portion may climb up onto the restricting portion and become unable to lock. This tilting of the restricting portion can be prevented by eliminating the clearance between the crimping portion and the jig on which the crimping portion is placed when crimping the crimping portion, thereby reducing play between the crimping portion and the jig. However, considering dimensional variations in parts, eliminating the clearance is not practical, making it difficult to completely prevent the tilting of the restricting portion. Therefore, a method for reliably locking the locking portion of the crimping portion to the restricting portion even when the restricting portion is tilted has been desired.

[0005] The present disclosure was completed in light of the above circumstances, and aims to prevent opening at the crimping portion. [Means for solving the problem]

[0006] The crimping structure of the electric wire and the outer conductor of the present disclosure comprises: an open barrel-shaped crimping portion provided on an outer conductor connected to an end of an electric wire and crimped onto an outer periphery of the electric wire; The crimping portion is a base portion disposed along the outer periphery of the electric wire; a first crimping portion that extends in a cantilevered manner from the base portion in one circumferential direction of the electric wire and is crimped to surround an outer periphery of the electric wire; a second crimping portion that extends in a cantilevered manner in the other circumferential direction from a position forward of the first crimping portion on the base plate portion and is crimped to surround an outer periphery of the electric wire; a first locking portion provided by folding back a tip end portion of the first crimping portion inward in the circumferential direction; a second locking portion provided by folding back a tip end portion of the second crimping portion inward in the circumferential direction; a restricting portion that extends in a cantilevered manner rearward in the axial direction of the electric wire along an outer periphery of the electric wire and is covered by the first crimping portion and the second crimping portion; and the second engaging portion faces an edge of the restricting portion on one side in the circumferential direction, the first locking portion is located rearward of the second locking portion in the axial direction and faces an edge of the restricting portion on the other side in the circumferential direction in the circumferential direction, The circumferential width dimension of a first portion of the regulating portion that faces the first engaging portion is set smaller than the circumferential width dimension of a second portion of the regulating portion that faces the second engaging portion. [Effects of the Invention]

[0007] According to the present disclosure, opening at the crimping portion can be prevented. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a shielded conductive path according to the first embodiment. [Figure 2] FIG. 2 is a cross-sectional plan view of the shielded conductive path of the first embodiment. [Figure 3] FIG. 3 is a perspective view of the upper shell of the first embodiment. [Figure 4] FIG. 4 is a rear view of the upper shell of the first embodiment. [Figure 5] FIG. 5 is a cross-sectional view taken along line AA in FIG. [Figure 6] FIG. 6 is a perspective view of the lower shell of the first embodiment. [Figure 7] FIG. 7 is an enlarged plan view of a main part of the restricting portion of the lower shell according to the first embodiment. [Figure 8] FIG. 8 is an enlarged plan view of the main part showing the crimped portion. [Figure 9] FIG. 9 is an enlarged plan view of a main part showing a crimping portion crimped with a restricting portion in an inclined state. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. The crimping structure of the electric wire and the outer conductor of the present disclosure comprises: (1) The crimping portion is provided on an outer conductor connected to an end of an electric wire and is provided with an open-barrel-shaped crimping portion that is crimped to the outer periphery of the electric wire. The crimping portion has a base portion, a first crimping portion, a second crimping portion, a first locking portion, a second locking portion, and a restricting portion. The base portion is arranged to fit along the outer periphery of the electric wire. The first crimping portion extends cantilevered from the base portion in one circumferential direction of the electric wire and is crimped to surround the outer periphery of the electric wire. The second crimping portion extends cantilevered from a position on the base portion forward of the first crimping portion in the other circumferential direction and is crimped to surround the outer periphery of the electric wire. The first locking portion is provided by folding back the circumferential tip of the first crimping portion inward. The second locking portion is provided by folding back the circumferential tip of the second crimping portion inward. The restricting portion extends in a cantilevered manner rearward in the axial direction of the electric wire along the outer periphery of the electric wire and is covered by the first crimping portion and the second crimping portion. The second locking portion circumferentially faces an edge of the restricting portion on one side in the circumferential direction. The first locking portion circumferentially faces an edge of the restricting portion on the other side in the circumferential direction, rearward of the second locking portion in the axial direction. The circumferential width dimension of a first portion of the restricting portion that faces the first locking portion is set smaller than the circumferential width dimension of a second portion of the restricting portion that faces the second locking portion.

[0010] According to this configuration, the amount of displacement of the restricting portion is greater at the rear side than at the front side. According to the present disclosure, the circumferential width of the first portion of the restricting portion that faces the first locking portion is set smaller than the circumferential width of the second portion of the restricting portion that faces the second locking portion. Therefore, even if the rear end of the restricting portion, which has a larger amount of displacement than the front end, tilts toward the first locking portion, it is possible to prevent a situation in which the first locking portion rides up on the restricting portion and becomes unable to lock.

[0011] (2) In the circumferential direction, it is preferable that the edge of the first section on the side opposite to the first locking section be disposed in a stepped manner relative to the edge of the second section on the side opposite to the first locking section so as to approach the edge on the side opposite to the second locking section. With this configuration, the simple configuration of forming the second section and the first section in a stepped manner can prevent a situation in which the first locking section rides up on the restricting section and becomes unable to be locked, even if the restricting section is tilted in a direction approaching the first locking section.

[0012] (3) In (2), it is preferable that the circumferential width of the first portion is greater than half the circumferential width of the second portion. This configuration ensures the strength of the first portion and prevents deformation of this portion.

[0013] (4) It is preferable that the rear end of the first section protrude further rearward than the first locking section. With this configuration, the first locking section can face the edge of the first section over the entire axial direction, so that the first locking section can be reliably locked to the first section.

[0014] (5) It is preferable that the dimension of the first locking portion in the circumferential direction is smaller than the dimension of the second locking portion. With this configuration, the dimension in the circumferential direction between the first locking portion and the first portion can be made larger than the dimension in the circumferential direction between the second locking portion and the second portion. Therefore, even if the restricting portion tilts toward the first locking portion, it is possible to prevent the first locking portion from climbing up onto the restricting portion and becoming unable to lock.

[0015] [Embodiment 1] A first embodiment of the present disclosure will be described with reference to Fig. 1 to Fig. 9. In the drawings, "front side," "rear side," "upper side," "lower side," "right side," and "left side" are represented by "F," "B," "U," "D," "R," and "L," respectively. Note that the circumferential direction in the first embodiment includes both the clockwise direction and the counterclockwise direction around the axis when the shielded electric wire 11 is viewed from behind in the axial direction.

[0016] The crimping structure of an electric wire and an outer conductor in the first embodiment is applied to a shielded conductive path 10. As shown in FIG. 1, the shielded conductive path 10 has a configuration in which a shield terminal 20 is fixed to the front end of a shielded electric wire 11, which is an electric wire. As shown in FIG. 2, 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, an outer periphery of the insulator 15 surrounded by a tubular shielding layer 16 made of a braided wire, and the shielding 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, exposing the plurality of covered electric wires 12 in an individually bendable state. At the front end of each covered electric wire 12, the insulating coating 13 is removed, exposing the front end of the core wire 14.

[0017] A sleeve 18 is crimped onto the outer peripheral surface of the front end of the sheath 17. Behind the exposed region of the core wire 14, the front end of the shielding layer 16 is folded back, and the outer periphery of the sheath 17 and the sleeve 18 is covered by the folded back shielding layer 16. The region of the shielded wire 11 where the sleeve 18 is crimped is defined as a shield connection end 19.

[0018] The shield terminal 20 has inner conductors 21 individually connected to the front end of the core wire 14 of each covered electric wire 12, a dielectric 22 that houses the multiple inner conductors 21, and an outer conductor 23 that is attached to the dielectric 22 and surrounds the outer periphery of the dielectric 22. In other words, the outer conductor 23 is to be connected to the end of the shielded electric wire 11.

[0019] The outer conductor 23 includes a shell main body 24 and a crimping portion 25 connected to the rear end of the shell main body 24 (see FIG. 1). That is, the crimping portion 25 is provided on the outer conductor 23. The crimping portion 25 is crimped onto the outer periphery of the shielding layer 16 of the shielded wire 11. The outer conductor 23 is configured by joining together an upper shell 26 made of a metal plate that has been subjected to bending or the like and a lower shell 42 made of a metal plate that has been subjected to bending or the like.

[0020] 3 and 4, the upper shell 26 is a single component having an upper body portion 27, which constitutes the shell body portion 24, a base portion 30, a first crimped portion 31, and a second crimped portion 36. The upper body portion 27 has a bottom plate portion 28 and a pair of side plate portions 29 extending upward from both left and right edges of the bottom plate portion 28.

[0021] The base plate portion 30, the first crimping portion 31, and the second crimping portion 36 are components of the crimping portion 25. That is, the crimping portion 25 has the base plate portion 30, the first crimping portion 31, and the second crimping portion 36. The base plate portion 30 extends rearward from the rear edge of the bottom plate portion 28, and when the crimping portion 25 is viewed from behind, it has an arch shape with the central left and right portions curved downward (see FIG. 4). That is, the crimping portion 25 has an open barrel shape.

[0022] Before the crimping portion 25 is crimped to the shielded electric wire 11, the first crimping portion 31 extends in a flat plate shape diagonally upward and to the left from the left edge of the base plate portion 30. The extending direction of the first crimping portion 31 becomes the circumferential direction surrounding the shielded electric wire 11 after the crimping portion 25 is crimped (see FIG. 5). In other words, the first crimping portion 31 extends in a cantilevered manner from the base plate portion 30 in one circumferential direction of the shielded electric wire 11, and is crimped to surround the outer periphery of the shielded electric wire 11.

[0023] As shown in Fig. 3, the first crimping portion 31 has a pair of first extending portions 33 extending cantilevered from the front and rear ends of the base plate portion 30 and flush with the base plate portion 30. The width dimension of each first extending portion 33 (the dimension in the axial direction of the shielded electric wire 11) is smaller than the width dimension of the base plate portion 30. Each first extending portion 33 is rectangular. The extension dimension of each first extending portion 33 from the base plate portion 30 (the dimension in the circumferential direction perpendicular to the axis of the shielded electric wire 11) is a rectangle that is longer than the width dimension. The positions of the extending tips of the pair of first extending portions 33 are aligned (see Fig. 4).

[0024] A first locking portion 34 is provided at each of the extending tip ends of the pair of first extending portions 33. The first locking portion 34 is formed by bending the circumferential tip end of the first extending portion 33 of the first crimping portion 31 inward (toward the axis of the shielded electric wire 11) (see FIG. 5 ). The first locking portion 34 is formed across the entire width of the first extending portion 33 and protrudes inward from the inner surface of the first extending portion 33 by an amount equivalent to the plate thickness of the first locking portion 34. The extending tip surface of the first locking portion 34 forms a first locking surface 35 that faces the board portion 30. Before the crimping portion 25 is crimped to the shielded electric wire 11, the dimension of the rear first locking portion 34 in the extending direction is smaller than the dimension of the front first locking portion 34 in the extending direction. The first locking surface 35 of the rear first locking portion 34 is disposed at a position closer to the base end in the extension direction than the first locking surface 35 of the front first locking portion 34 (see FIG. 4).

[0025] Before the crimping portion 25 is crimped to the shielded electric wire 11, the second crimping portion 36 has a shape extending in a flat plate shape diagonally upward and to the right from the right edge of the base plate portion 30. The extending direction of the second crimping portion 36 is the circumferential direction surrounding the shielded electric wire 11 when the crimping portion 25 is crimped (see FIG. 5). In other words, the second crimping portion 36 extends in a cantilevered manner in the other circumferential direction from a position forward of the first crimping portion 31 on the rear side of the base plate portion 30, and is crimped to surround the outer periphery of the shielded electric wire 11 (see FIGS. 8 and 9). When the crimping portion 25 is crimped, the extending direction of the second crimping portion 36 and the extending direction of the first crimping portion 31 are opposite to each other (see FIG. 5). In other words, when the crimping portion 25 is viewed from behind in the axial direction of the shielded electric wire 11, the first crimping portion 31 extends clockwise from the base plate portion 30, while the second crimping portion 36 extends counterclockwise from the base plate portion 30 (see Figure 5).

[0026] The second crimping portion 36 has one second extending portion 38 extending in a cantilevered manner from the center in the front-rear direction of the right edge of the base plate portion 30. The width dimension of the second extending portion 38 (the dimension in the axial direction of the shielded electric wire 11) is smaller than the width dimension of the base plate portion 30. The second extending portion 38 is rectangular. The extension dimension of the second extending portion 38 from the base plate portion 30 is a rectangle that is longer than the width dimension. The width dimension of the second extending portion 38 is set to be slightly smaller than the distance between the pair of first extending portions 33 (see FIGS. 8 and 9). The width dimension of the second extending portion 38 is the same as the sum of the width dimensions of the pair of first extending portions 33.

[0027] A second locking portion 39 is provided at the extending end of the second extending portion 38. The second locking portion 39 is formed by bending the circumferential tip of the second extending portion 38 of the second crimping portion 36 inward (toward the axis of the shielded electric wire 11). The second locking portion 39 is formed across the entire width of the second extending portion 38 and protrudes inward from the inner surface of the second extending portion 38 by an amount equivalent to the plate thickness of the second locking portion 39. The extending tip surface of the second locking portion 39 forms a second locking surface 40 facing the base plate portion 30. The dimension of the rear first locking portion 34 in the circumferential direction is smaller than the dimension of the second locking portion 39 (see FIG. 5 ). The first locking portion 34 and the second locking portion 39 are components of the crimping portion 25. In other words, the crimping portion 25 has the first locking portion 34 and the second locking portion 39.

[0028] A plurality of (six in the first embodiment) biting protrusions 41 are formed on the rear end edge of the crimping portion 25 (see FIG. 4). The biting protrusions 41 are formed by bending part of the rear end edge of the crimping portion 25 inward (toward the axis of the shielded electric wire 11).

[0029] As shown in FIG. 6 , the lower shell 42 is a single component having a lower main body portion 43 constituting the shell main body 24 and a restricting portion 46. The lower main body portion 43 has a plate-shaped upper surface portion 44, a pair of plate-shaped side surfaces 45 extending downward from both left and right edges of the upper surface portion 44, and a pair of plate-shaped bottom surfaces 47 extending inward in the left-right direction from the lower edges of the side surfaces 45. The restricting portion 46 extends rearward in a cantilevered manner from the rear edge of the upper surface portion 44. The restricting portion 46 is a component of the crimping portion 25. In other words, the crimping portion 25 has the restricting portion 46.

[0030] As shown in FIG. 7, the restricting portion 46 has a first portion 46A and a second portion 46B located forward 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. The circumferential width dimension W1 of the first portion 46A is greater than half the circumferential width dimension W2 of the second portion 46B. The restricting portion 46 has a stepped shape in plan view, with a portion of the rear side cut out. The right and rear edges of the second portion 46B intersect at a curved surface K. The right and rear edges of the first portion 46A are connected without a curved surface.

[0031] Next, the assembly of the shielded conductive path 10 will be described. The upper-side main body portion 27 and the lower-side main body portion 43 are combined to sandwich the dielectric 22 from above and below, thereby forming the square-tube-shaped shell main body portion 24 (see FIG. 1). The inner conductor 21, the entire dielectric 22, and the exposed area of ​​the covered electric wire 12 are housed within the shell main body portion 24 (see FIG. 2). When the outer conductor 23 and the shielded electric wire 11 are not crimped, the crimping portion 25 connected to the rear end of the shell main body portion 24 is positioned so that the board portion 30 and the restricting portion 46 face each other above and below, and the shield connecting end portion 19 is disposed between the board portion 30 and the restricting portion 46 (see FIG. 5).

[0032] In this state, the crimping portion 25 and the shield connection end 19 are set in an applicator (not shown) and crimping is performed. In the crimping process, a crimper and an anvil hold the crimping portion 25 and the shield connection end 19 together from above and below, and the crimping portion 25 is plastically deformed to surround the shield connection end 19 while contracting in diameter. At this time, the base plate portion 30 is plastically deformed to fit the outer periphery of the shielded electric wire 11 (see FIG. 5).

[0033] Then, the two first extending portions 33 and the one second extending portion 38 are pressed against the outer surface of the restricting portion 46 while undergoing plastic deformation. At this time, the second extending portion 38 fits between the two first extending portions 33 (see FIG. 8). The pair of first locking portions 34 are then positioned to the right of the restricting portion 46, and the first locking surface 35 and the right side surface of the restricting portion 46 are spaced apart and face each other (see FIG. 8). The second locking portion 39 is then positioned to the left of the restricting portion 46, and the second locking surface 40 and the left side surface of the restricting portion 46 are spaced apart and face each other (see FIG. 8).

[0034] Then, when the clamping pressure between the crimper and the anvil on the crimping portion 25 is released, the first crimping portion 31 and the second crimping portion 36 elastically return to their original position in the radially expanding direction due to spring back, and the regulating portion 46 elastically return to their original position in the radially outward direction due to spring back.

[0035] When the first crimping portion 31 elastically returns to its original position in the radially expanding direction, the rear first locking portion 34, located rearward of the second locking portion 39 in the axial direction, moves toward the right of the restricting portion 46 (the other circumferential side) and radially outward. At this time, the restricting portion 46 is displaced radially outward by springback while remaining in contact with the inner surface of the first extending portion 33. The first locking surface 35 of the rear first locking portion 34 faces the right edge (the other circumferential edge) of the first portion 46A of the restricting portion 46 from the right side (the other circumferential side). In other words, the first locking surface 35 of the first locking portion 34 faces the right edge of the first portion 46A of the restricting portion 46.

[0036] When the second crimping portion 36 elastically returns to its original position in the radially expanding direction, the second locking portion 39 moves radially outward while approaching the restricting portion 46 from the left. At this time, the restricting portion 46 moves radially outward due to springback while remaining in contact with the inner surface of the second extending portion 38. The second locking surface 40 of the second locking portion 39 faces the left edge (edge ​​on one circumferential side) of the second portion 46B of the restricting portion 46 from the left (from one circumferential side). In other words, the second locking surface 40 of the second locking portion 39 faces the left edge of the second portion 46B of the restricting portion 46.

[0037] The restricting portion 46 extends in a cantilevered manner from the rear end of the shell main body 24 rearward in the axial direction of the shielded electric wire 11 along the outer periphery of the shielded electric wire 11, and is covered by the first extending portion 33 of the first crimping portion 31 and the second extending portion 38 of the second crimping portion 36 (see FIG. 8 ). In this case, the circumferential dimension of the rear first locking portion 34 is smaller than the circumferential dimension of the front first locking portion 34 and the circumferential dimension of the second locking portion 39. In this way, the first locking portion 34 and the second locking portion 39 face the restricting portion 46 from both sides in the circumferential direction, thereby restricting the expanding deformation of the crimping portion 25.

[0038] When the crimping portion 25 is in a crimped state, the biting protrusions 41 bite into the outer periphery of the sheath 17 at a position immediately rearward of the sleeve 18 (see FIG. 2). The biting protrusions 41 bite into the sheath 17, thereby restricting the relative circumferential and axial displacement of the crimping portion 25 with respect to the shielded electric wire 11.

[0039] As shown in FIG. 8 , when the crimping portion 25 is in a crimped state, the restricting portion 46 is covered by the first crimping portion 31 (first extending portion 33) and the second crimping portion 36 (second extending portion 38). The rear end of the first portion 46A of the restricting portion 46 protrudes slightly rearward beyond the first locking portion 34 of the first crimping portion 31. The outer surface of the restricting portion 46 is disposed so as to contact the inner periphery of the first crimping portion 31 (first extending portion 33) and the inner periphery of the second crimping portion 36 (second extending portion 38). The pair of first locking portions 34 and one second locking portion 39 are disposed so as to alternate in the axial direction (front-rear direction) of the shielded electric wire 11. The extension direction of the first extension portion 33 in the circumferential direction and the extension direction of the second extension portion 38 are opposite to each other, and the first locking portion 34 and the second locking portion 39 are arranged so as to sandwich the regulating portion 46 in the circumferential direction relative to the regulating portion 46.

[0040] Here, the dimensions of the applicator where the crimping portion 25 and the shield connection end 19 are set are set large enough to accommodate the maximum dimensional crimping portion 25 and the shield connection end 19 within the dimensional tolerances. For this reason, when the crimping portion 25 and the shield connection end 19 are set in the applicator, they may be set with a slight misalignment in the circumferential direction.

[0041] If the crimping process is performed in a state in which the crimping portion 25 and the shield connection end portion 19 are set with a slight circumferential offset relative to the applicator, there may be a difference in the timing at which the first extension portion 33 and the second extension portion 38 come into contact with the restricting portion 46. This difference in timing may cause the restricting portion 46 to tilt in the circumferential direction with its base end as a fulcrum.

[0042] For example, the two first extending portions 33 come into contact with the restricting portion 46 before the second extending portion 38. In this case, the restricting portion 46 is pressed rightward by the first extending portion 33 and tilts with its base end as a fulcrum toward the base end of the second extending portion 38 (see FIG. 9). Then, crimping of the crimping portion 25 is completed with the restricting portion 46 tilted toward the base end of the second extending portion 38. The amount of displacement of the restricting portion 46 tilted toward the base end of the second extending portion 38 increases from the front end to the rear end.

[0043] Here, in the circumferential direction, the edge of the first portion 46A on the side (right side) facing the first locking portion 34 is disposed in a stepped manner so as to approach the edge of the side facing the second locking portion 39 relative to the edge of the second portion 46B on the side (left side) facing the first locking portion 34. In addition, in the circumferential direction, the dimension of the first locking portion 34 of the rear first extending portion 33 is set smaller than the dimension of the second locking portion 39. Therefore, as shown in FIG. 9 , even if the restricting portion 46 is tilted in a direction approaching the base end of the second extending portion 38, the first locking surface 35 of the rear first locking portion 34 can be reliably placed opposite the right edge of the first portion 46A of the restricting portion 46.

[0044] Here, it is believed that the same effect as above can be achieved by setting the dimension of the first locking portion 34 of the rear first extending portion 33 to be the same as the dimension of the second locking portion 39 in the circumferential direction and increasing the length dimension of the rear first extending portion 33. However, when the crimping portion 25 configured in this manner is clamped between a crimper and an anvil, the tip of the rear first extending portion 33 may hit the edge of the base plate portion 30 to which the base end of the second extending portion 38 is connected, which may result in buckling of the first extending portion 33. Furthermore, if the base plate portion 30 to which the base end of the second extending portion 38 is connected is moved away from the first extending portion 33 in the circumferential direction to avoid buckling of the first extending portion 33, the function of the crimping portion 25 to crimp to the shielded electric wire 11 may be impaired. For this reason, it is preferable to set the dimension of the first locking portion 34 of the rear first extending portion 33 smaller than the dimension of the second locking portion 39 in the circumferential direction.

[0045] In the crimping process, when the second extending portion 38 contacts the restricting portion 46 before the first extending portion 33, the restricting portion 46 is pressed leftward by the second extending portion 38 and tilts with its base end as a fulcrum toward the base end of the first extending portion 33 (not shown). The second portion 46B is disposed closer to the base end of the restricting portion 46 than the first portion 46A. Therefore, the amount of displacement of the second portion 46B toward the base end of the first extending portion 33 is smaller than the amount of displacement of the first portion 46A toward the base end of the first extending portion 33. Therefore, when the restricting portion 46 tilts toward the base end of the first extending portion 33, the second locking portion 39 does not climb up onto the outer surface of the second portion 46B.

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

[0047] The crimping structure for an electric wire and an outer conductor according to the present disclosure is provided on an outer conductor 23 connected to an end of a shielded electric wire 11, and includes an open-barrel-shaped crimping portion 25 that is crimped to the outer periphery of the shielded electric wire 11. The crimping portion 25 has a base portion 30, a first crimping portion 31, a second crimping portion 36, a first locking portion 34, a second locking portion 39, and a restricting portion 46. The base portion 30 is disposed along the outer periphery of the shielded electric wire 11. The first crimping portion 31 extends from the base portion 30 in a cantilevered manner in one circumferential direction of the shielded electric wire 11 and is crimped to surround the outer periphery of the shielded electric wire 11. The second crimping portion 36 extends from a position on the base portion 30 forward of the first crimping portion 31 in a cantilevered manner in the other circumferential direction and is crimped to surround the outer periphery of the shielded electric wire 11.

[0048] The first locking portion 34 is provided by folding back inward the circumferential tip of the first crimping portion 31. The second locking portion 39 is provided by folding back inward the circumferential tip of the second crimping portion 36. The restricting portion 46 extends in a cantilevered manner rearward in the axial direction of the shielded electric wire 11 along the outer periphery of the shielded electric wire 11 and is covered by the first crimping portion 31 and the second crimping portion 36. The second locking portion 39 faces in the circumferential direction an edge on one side in the circumferential direction of the restricting portion 46. The first locking portion 34 faces in the circumferential direction an edge on the other side in the circumferential direction of the restricting portion 46, rearward of the second locking portion 39 in the axial direction. The circumferential width dimension of the first portion 46A of the regulating portion 46, which faces the first engaging portion 34, is set smaller than the circumferential width dimension of the second portion 46B of the regulating portion 46, which faces the second engaging portion 39.

[0049] According to this configuration, the amount of displacement of the restricting portion 46 is greater at the rear end than at the front end. According to the present disclosure, the circumferential width of the first portion 46A of the restricting portion 46 that faces the first locking portion 34 is set smaller than the circumferential width of the second portion 46B of the restricting portion 46 that faces the second locking portion 39. Therefore, even if the rear end of the restricting portion 46, which has a greater amount of displacement than the front end, tilts toward the first locking portion 34, it is possible to prevent the first locking portion 34 from climbing up onto the restricting portion 46 and becoming unable to lock.

[0050] In the circumferential direction, the edge of the first portion 46A on the side facing the first locking portion 34 is arranged in a stepped shape so as to approach the edge of the side facing the second locking portion 39 relative to the edge of the second portion 46B on the side facing the first locking portion 34. With this configuration, even if the restricting portion 46 is tilted in a direction approaching the first locking portion 34, the simple configuration of forming the second portion 46B and the first portion 46A in a stepped shape can prevent the first locking portion 34 from climbing up onto the restricting portion 46 and becoming unable to be locked.

[0051] The circumferential width W1 of the first portion 46A is greater than half the circumferential width W2 of the second portion 46B. This configuration ensures the strength of the first portion 46A and prevents this portion from being deformed.

[0052] The rear end of the first portion 46A protrudes further rearward than 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, and therefore the first locking portion 34 can be reliably locked to the first portion 46A.

[0053] The dimension of the first locking portion 34 in the circumferential direction is smaller than the dimension of the second locking portion 39. With this configuration, the dimension in the circumferential direction between the first locking portion 34 and the first portion 46A can be made larger than the dimension in the circumferential direction between the second locking portion 39 and the second portion 46B. Therefore, even if the restricting portion 46 is tilted in a direction approaching the first locking portion 34, it is possible to prevent a situation in which the first locking portion 34 rides up on the restricting portion 46 and becomes unable to be locked.

[0054] <Other embodiments> The present disclosure is not limited to the first embodiment described above and illustrated in the drawings. The present invention includes all modifications within the scope of the claims and meanings equivalent to those of the claims, and is intended to include the following embodiments. (1) Unlike the first embodiment, the first locking portion may be formed in only a part of the first extending portion in the axial direction, and the second locking portion may be formed in only a part of the second extending portion in the axial direction. (2) Unlike the first embodiment, the number of first locking portions and second locking portions arranged alternately in the axial direction may be changed to a combination other than that of the first embodiment (for example, Locking Part 2 and Part 3 Locking The locking portions may be a combination of one locking portion and one pair of second locking portions. (3) Unlike the first embodiment, only one of the configuration in which the rear first engaging portion is shortened or the configuration in which the circumferential dimension of the first portion is reduced may be adopted. (4) Unlike the first embodiment, the first crimping portion, the second crimping portion, and the restricting portion may be configured in a reversed configuration in the left-right direction. [Explanation of symbols]

[0055] 10...Shielded conductive path 11...Shielded wire (electric wire) 12...Insulated wire 13...Insulating coating 14...Core wire 15...Insulator 16...Shield 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 28...Bottom plate part 29...Side plate part 30...Board 31...First crimping part 33...First extension part 34...First locking portion 35...First locking surface 36...Second crimping part 38…Second extension part 39...Second locking portion 40...Second locking surface 41...biting protrusion 42...Loiselle 43...Lower body part 44...Top part 45…Side part 46...Regulatory Department 46A…1st part 46B…Second part 47…Bottom part K...Curved surface W1: Width dimension W2: Width dimension

Claims

1. an open barrel-shaped crimping portion provided on an outer conductor connected to an end of an electric wire and crimped onto an outer periphery of the electric wire; The crimping portion is a base portion disposed along the outer periphery of the electric wire; a first crimping portion extending in a cantilevered manner from the base portion in one circumferential direction of the electric wire and crimped to surround an outer periphery of the electric wire; a second crimping portion extending in a cantilevered manner in the other circumferential direction from a position forward of the first crimping portion on the base plate portion and crimped to surround an outer periphery of the electric wire; a first locking portion provided by folding back a tip end portion of the first crimping portion inward in the circumferential direction; a second locking portion provided by folding back a tip end portion of the second crimping portion inward in the circumferential direction; a restricting portion that extends in a cantilevered manner rearward in the axial direction of the electric wire along an outer periphery of the electric wire and is covered by the first crimping portion and the second crimping portion; and the second engaging portion faces an edge of the restricting portion on one side 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 first portion of the restricting portion facing the first engaging portion having a circumferential width dimension set smaller than a second portion of the restricting portion facing the second engaging portion;

2. 2. The crimping structure for an electric wire and an outer conductor according to claim 1, wherein, in the circumferential direction, an edge of the first portion on the side opposite to the first locking portion is arranged in a stepped manner so as to approach an edge of the second portion on the side opposite to the first locking portion.

3. 3. The crimping structure for an electric wire and an outer conductor according to claim 2, wherein a width dimension of the first portion in the circumferential direction is greater than half a width dimension of the second portion in the circumferential direction.

4. The crimping structure for an electric wire and an outer conductor according to claim 1 , wherein a rear end of the first portion projects rearward beyond the first engaging portion.

5. The crimping structure for an electric wire and an outer conductor according to claim 1 , wherein a dimension of the first locking portion in the circumferential direction is smaller than a dimension of the second locking portion.

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

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