JP5895785B2 - Terminal crimping structure, manufacturing method of terminal crimping structure, and outer conductor terminal - Google Patents

Description

  The present invention relates to a terminal crimping structure, a manufacturing method thereof, and an outer conductor terminal, and more specifically, a terminal crimping structure in which an outer conductor terminal is crimped to a terminal of a shielded electric wire, a manufacturing method thereof, and an outer conductor used therefor Regarding terminals.

  In recent years, electric signals transmitted to electronic components and control printed boards built in electric devices of automobiles have been increased in frequency. In general, shielded cables are used to transmit high-frequency electrical signals. However, as the transmitted electrical signals become higher in frequency, shielded connectors connected to this shielded cable can handle higher frequencies. The demand is growing.

  A coaxial cable, which is a type of shielded cable, includes a signal line, an insulator covering the outer periphery thereof, a shield conductor such as a braid formed by braiding a plurality of strands, and an insulating sheath covering the outer periphery of the shield conductor. It has a structure arranged coaxially. Usually, the shield connector connected to the terminal portion of the coaxial cable includes an inner conductor terminal connected to a signal conductor that transmits a high-frequency signal, and an outer conductor terminal that is connected to the shield conductor and covers the outer periphery of the inner conductor terminal. And a dielectric having a predetermined relative dielectric constant interposed between the inner conductor terminal and the outer conductor terminal, and the signal exposed by stripping off the insulator and sheath of the end portion of the coaxial cable. An inner conductor terminal and an outer conductor terminal are connected to the conductor and the shield conductor, respectively. Such a shield connector is disclosed in, for example, Patent Document 1 below.

  In this type of shield connector, the outer conductor terminal is crimped and connected to the shield conductor of the coaxial cable through a crimping piece of a barrel formed as a part of the outer conductor terminal. FIG. 7 shows a sectional view of this barrel portion. The crimping pieces 103a and 103b of the outer conductor terminals are crimped to the braid Wd by folding the exposed braid Wd and crimping the braid Wd on the outer periphery of the sheath We terminal. At this time, the other crimping piece 103b is caulked so as to overlap the one crimping piece 103a.

JP 2000-173725 A

  However, when the crimping pieces 103a and 103b are caulked so that the tips overlap each other, a phenomenon called spring back in which a restoring force is exerted on the plastically deformed material due to the elasticity of the material itself may occur. is there. Then, the crimping pieces 103a and 103b are opened, and the tightening of the crimping pieces 103a and 103b to the braided reversing portion Wf is reduced. As a result, the pullout strength of the coaxial cable W with respect to the shield connector 100 is lowered.

  Therefore, a problem to be solved by the present invention is a terminal crimping structure in which an outer conductor terminal is crimped to the end of a shielded wire via a barrel, and a terminal crimping structure capable of suppressing the expansion of the barrel due to springback and a method for manufacturing the same. It is to provide and to provide an outer conductor terminal for forming such a terminal crimp structure.

  In order to solve the above problems, the terminal crimping structure according to the present invention is the terminal crimping structure in which the barrel of the outer conductor terminal is crimped to the outer periphery of the shield conductor exposed at the terminal portion of the shielded electric wire having the shield conductor. The barrel is a caulking portion that caulks the shielded electric wire in close contact with the outer periphery of the shield conductor, and a plate-like first extending piece that extends in a circumferential direction of the shielded electric wire from an opposing edge of the caulked portion. And a second extension piece, and the first extension piece has an end edge on a boundary with the caulking portion, and a through-hole through which the second extension piece can be inserted. And the caulking portion is caulked around the outer circumference of the shield conductor, the second extending piece is inserted into the through hole, and one of the extending pieces is a boundary with the caulking portion. And the other extension piece is It is summarized as in close contact with the part.

  Here, the first extending piece is folded back to the outer peripheral surface side of the caulking portion, and the second extending piece is inserted into the through-hole from the folded peak side to be in close contact with the outer peripheral surface of the caulking portion. It is good to have.

  Moreover, it is preferable that the location where said 1st extension piece and said 2nd extension piece have overlapped is pressed from the outer side toward the said shield electric wire.

  On the other hand, the manufacturing method of the terminal crimping structure according to the present invention is the manufacturing method of the terminal crimping structure in which the barrel of the outer conductor terminal is crimped to the outer periphery of the shield conductor exposed at the end portion of the shielded electric wire having the shield conductor. The barrel is in close contact with the outer periphery of the shield conductor and caulked the shielded electric wire, and the first extending piece and the second extending from the opposing edges of the caulked portion in the circumferential direction of the shielded electric wire The first extending piece has an edge on the boundary with the caulking portion, and a through-hole through which the second extending piece can be inserted is formed. The caulking portion is caulked around the outer circumference of the shield conductor, the second extending piece is inserted into the through hole, and one of the extending pieces is folded at the boundary with the caulking portion, The two extension pieces are stacked on top of each other And summarized in that adhering the extended piece to the crimping portion.

  Here, after either one of the extending pieces is folded back at the boundary with the caulking portion, the barrel is disposed on the outer periphery of the shield conductor, and the caulking portion is caulked around the outer periphery of the shield conductor. Is preferred.

  Further, the first extending piece is folded back to the side that becomes the outer peripheral surface of the caulking portion, and the second extending piece is inserted into the through-hole from the folded peak side to be in close contact with the outer peripheral surface of the caulking portion. It is good to let them.

  Furthermore, after the said crimping part partially expands, it is good to press the location where said 1st extension piece and said 2nd extension piece overlapped from the outer side toward the said shield electric wire.

  Moreover, the outer conductor terminal according to the present invention is an outer conductor terminal having a barrel that is crimped to the outer periphery of the shield conductor exposed at the end portion of the shielded electric wire having the shield conductor, wherein the barrel is disposed on the outer periphery of the shield conductor. A caulking portion that is in close contact and caulked to the shielded electric wire, and a plate-like first extension that extends in a circumferential direction of the shielded electric wire from the opposing edge of the caulked portion when crimped to the shielded electric wire A through-hole having a piece and a second extending piece, the first extending piece having an edge on a boundary with the caulking portion, and through which the second extending piece can be inserted. The gist is that is formed.

  Here, any one of the first extension piece and the second extension piece may be bent at a boundary with the caulking portion.

  According to the terminal crimping structure according to the above invention, the second extending piece is inserted into the through hole formed in the first extending piece, and either one of the extending pieces is folded at the boundary with the caulking portion. Therefore, when the other extension piece is locked to the folded-back portion and a force is applied to expand the caulking portion, the movement of the second extension piece escaping from the through hole is prevented. As a result, the caulking portion is prevented from expanding due to the spring back, and the pullout strength of the shielded wire with respect to the outer conductor terminal is improved.

  Here, the first extending piece is folded back to the outer peripheral surface side of the caulking portion, and the second extending piece is inserted into the through hole from the folded peak side and is in close contact with the caulking portion. In this case, the second extending piece can be locked to the edge of the through hole, and the caulking portion can be effectively prevented from expanding. In addition, since both the extending pieces are disposed outside the caulking portion, the adhesion between the caulking portion and the shielded electric wire is enhanced, which also contributes to effective prevention of the caulking portion from spreading. Furthermore, in the manufacturing process, the step of caulking the caulking portion to the outer periphery of the shield conductor, the step of inserting the second extension piece through the through hole of the first extension piece, and the step of folding back the first extension piece Are easy to execute as a series of continuous operations.

  Moreover, when the location where the said 1st extension piece and the said 2nd extension piece have overlapped is pressed from the outer side toward the said shield electric wire, a caulking part will accompany a 1st extension piece. Opening toward the outside is more firmly prevented, and the caulking portion is effectively prevented from expanding.

  On the other hand, according to the manufacturing method of the terminal crimping structure according to the present invention, it is possible to easily manufacture the terminal crimping structure in which the caulking portion is prevented from expanding due to the spring back.

  In addition, the outer conductor terminal according to the present invention is suitable for forming a terminal crimping structure in which the barrel is prevented from expanding due to the spring back while having a simple configuration.

It is a figure which shows an example of the structure of the outer conductor terminal concerning this invention, (a) is a top view, (b) is a side view (AA direction of (a)), (c) is the side seen from the opposite side The figure (BB direction of (a)) (d) is a rear view (CC direction of (a)). It is the figure which expand | deployed and simplified the braided barrel of the outer conductor terminal concerning this invention. It is the schematic diagram which showed an example of the terminal crimping structure concerning this invention with the manufacture procedure. It is the schematic diagram which showed the example of the apparatus which manufactures a terminal crimping structure with the manufacture procedure. It is the schematic diagram which showed another manufacturing procedure of the terminal crimping structure concerning this invention. It is the figure which simplified and showed the several example of the terminal crimping structure concerning this invention. It is sectional drawing of the barrel part crimped | bonded to the outer periphery of the shield cable about the outer conductor terminal of the conventional shield connector.

  Embodiments of the present invention will be described below in detail with reference to the drawings.

  1-3, the outer conductor terminal concerning 1st embodiment of this invention, the terminal crimping structure using the same, and its manufacturing procedure are shown. The outer conductor terminal 1 is connected to the end of the coaxial cable W.

  The coaxial cable W includes a signal conductor Wa, a braid Wd knitted with a plurality of strands as a shield conductor, an insulator Wb interposed therebetween, and an insulating sheath We covering the outer periphery of the braid Wd. It has a configuration arranged coaxially. The outer conductor terminal 1 is connected to the braid and forms a shield connector together with the inner conductor terminal and the dielectric housed therein.

  The outer conductor terminal 1 is formed by bending a conductive plate material, and a substantially cylindrical shell portion 2 is formed on the front side. The shell portion 2 accommodates a female or male inner conductor terminal (not shown) connected to the signal conductor Wa of the coaxial cable W. Further, between the inner conductor terminal and the outer conductor terminal 1, a dielectric (not shown) having a predetermined dielectric constant and formed in a cylindrical shape that ensures insulation between the two terminals is disposed.

  Behind the outer conductor terminal 1 is a braided barrel 3 that is crimped to the braid of the coaxial cable W and is electrically connected to the braid. Further behind the braided barrel 3, there is formed an insulation barrel 4 that is crimped to the coaxial cable W from the outside of the sheath We of the coaxial cable W, and that physically connects the outer conductor terminal 1 to the coaxial cable W. Yes. In this embodiment, since the case where the shield conductor is a braid is adopted as an example, the name “braided barrel” is adopted, but the shield conductor has a configuration other than the braid, such as a metal foil. In this case, a barrel structure having the same configuration as that of the “braided barrel” can be used.

  The outer conductor terminal 1 according to the present invention is characterized by the configuration of the braided barrel 3. The braided barrel 3 has a caulking portion 3a formed in a substantially U-shaped cross section. The caulking portion 3a has a role of forming a physical and electrical connection between the braid and the outer conductor terminal 1 by closely adhering the outer periphery of the exposed braid of the coaxial cable W around the periphery and being caulked by the braid. Fulfill.

  At both end edges located at the upper part of the U-shape of the caulking portion 3a, the plate-like first extending piece 3b and the second extending piece are extended upward, that is, in the circumferential direction of the coaxial cable W. 3c is formed. When the caulking portion 3a is caulked to the outer periphery of the braid, the first extending piece 3b and the second extending piece 3c expand the caulking portion 3a by a springback phenomenon, and the coaxial cable W is connected to the outer conductor terminal. It plays a role to prevent it from becoming easy to escape.

  The second extending piece 3c has a substantially rectangular plate-like structure whose width (length in a direction perpendicular to the direction along the circumference of the coaxial cable W) is shorter than that of the caulking portion 3a.

  On the other hand, the 1st extension piece 3b is a substantially rectangular plate-shaped member, and has the substantially rectangular through-hole 3d. The through hole 3d has a size that allows the second extending piece 3c to be inserted therethrough. That is, the width of the through hole 3d is formed larger than the width of the second extending piece 3c. Further, the edge 3d1 on the caulking portion 3a side of the through hole 3d is formed so as to overlap the boundary between the first extending piece 3b and the caulking portion 3a. The width of the first extension piece 3b may be the same as or narrower than the width of the caulking portion 3a. However, when the width of the first extending piece 3b is the same as the width of the caulking portion 3a as shown in the drawing, Although the boundary between the protruding piece 3b and the caulking portion 3a is not defined from the form surface, in this case, as indicated by the dotted line in FIG. 2, the position of the edge 3d1 of the through hole 3d is defined as the boundary. Defining the position of the boundary in this way is important when forming a terminal crimping structure to be described later.

  An example of a terminal crimping structure formed by crimping the outer conductor terminal 1 having such a configuration to the end of the coaxial cable W is shown in FIG. 3 together with its manufacturing method. In FIG. 3, only the braided barrel 3 is extracted from the outer conductor terminal 1, and the configuration viewed from the back corresponding to FIG. 1 (d) is shown in a simplified manner.

  In forming the terminal crimping structure, first, the shield We is covered over a predetermined length of the end of the coaxial cable W, and the exposed braid Wd is folded outside the shield We to form the braid reversal portion Wf. . In this state, the end of the coaxial cable W is placed on the bottom of the caulking portion 3a of the braided barrel 3 as shown in FIG.

  Next, as shown in FIG. 3B, the caulking portion 3a is brought into close contact with the outer periphery of the braid reversing portion Wf and applied to the center of the coaxial cable W so that the caulking portion 3a is reversed. It crimps on the outer periphery of the part Wf. Then, the second extending piece 3c is inserted through the through hole 3d of the first extending piece 3b. At this time, the insertion is performed from the inner surface of the first extending piece 3b, that is, the surface where the caulking portion 3a is in contact with the braided reversing portion Wf.

  Further, as indicated by an arrow in FIG. 3B, force is applied to the first extending piece 3b from the inner surface of the first extending piece 3b. As a result, as shown in FIG. 3C, the first extending piece 3b is folded back toward the outer peripheral surface of the caulking portion 3a at the boundary with the caulking portion 3a, that is, at the edge 3d1 of the through hole 3d. At the same time, the second extending piece 3c is brought into close contact with the outer peripheral surface of the caulking portion 3a. As a result, the first extending piece 3b is folded back at the boundary with the caulking portion 3a, and the second extending piece 3c is inserted into the through hole 3d from the side of the crest of the folding, and the outer circumferential surface of the caulking portion 3a. It comes into contact. As described above, the spread preventing structure 5 including the two extending pieces 3b and 3c is formed.

  Furthermore, as shown by the arrow in FIG. 3C, the first extension piece 3b and the second extension piece 3c overlap each other with respect to the formed expansion preventing structure. The first extension piece 3b and the second extension piece 3c may be pressed against the caulking portion 3a and the coaxial cable W by pressing toward the coaxial cable W from above the extension piece 3b.

  In the spread preventing structure 5, the second extending piece 3c is inserted into the through hole 3d provided in the first extending piece 3b, and a fold is formed at the edge 3d1 of the through hole 3d. Even if the second extending piece 3c is locked to the folded-back portion and a force to push the caulking portion 3a is applied, this locking structure prevents it. That is, due to the elasticity of the material constituting the caulking portion 3a, the caulking portion 3a is lifted upward in FIG. 3C to the end portion on the first extending piece 3b side and / or the second extending piece 3c side. Even if such a force is applied, the second extending piece 3c cannot be removed from the through hole 3d formed in the first extending piece 3b. On the contrary, since the second extending piece 3c is strongly pressed against the end edge 3d1 of the through-hole 3d by such a force, the first extending piece 3b and the second extending piece 3c are pressed. The locking between is deeper. In this way, the caulking portion 3a is prevented from expanding due to the spring back. That is, it becomes difficult for the coaxial cable W to come out of the outer conductor terminal 1, and the pull-out strength is improved. Further, in the state of FIG. 3C, when pressing is performed on a portion where the first extension piece 3 b and the second extension piece 3 c overlap, the coaxial cable is connected from the outside of the expansion prevention structure 5. By exerting a force acting in the direction of W, the expansion of the caulking portion 3a due to the spring back is prevented more firmly.

  As described above, when the force for expanding the caulking portion 3a is applied, the second extending piece 3c is strongly pressed against the end edge 3d1 of the through hole 3d, and the locking relationship between the two becomes deeper. , After the first extending piece 3b is turned back, the caulking portion 3a is partially expanded, and the second extending piece 3c is completely locked to the edge 3d1 of the through hole 3d. In the state where the expansion of 3a has stopped, it is preferable to press the overlapping portion.

  The terminal crimping structure as described above includes the step of caulking the caulking portion 3a on the outer periphery of the braided reversing portion Wf of the coaxial cable W, the folding back of the first extending piece 3b, and the caulking portion 3a of the second extending piece 3c. Any means may be used as long as the step of closely adhering to the outer peripheral surface can be performed. For example, a method using an apparatus as shown in FIG. 4 can be exemplified.

  The crimping device 30 shown in FIG. 4 includes an anvil 31 and a crimper 32 that face each other, and a pressing tool 34 that is inserted into an insertion hole 33 provided in the crimper 32. The crimper 32 can move up and down, and the pressing tool 34 can also move up and down within the insertion hole 33 independently of the crimper 32.

  The braided barrel 3 on which the coaxial cable W is placed and opened in a substantially U-shaped cross section is disposed on the anvil 31. The crimper 32 is gradually lowered toward the anvil 31, and in the process, the caulking portion 3a of the braided barrel 3 is coaxially formed by the curved shapes of the upper surface of the anvil 31 and the lower surface of the crimper 32 as shown in FIG. It is bent into a shape along the outer periphery of the cable W and is in close contact with the outer periphery of the coaxial cable W. When the crimper 32 reaches the lowermost position as shown in FIG. 4B, the caulking portion 3a is caulked around the outer circumference of the coaxial cable W once. At the same time, the second extension piece 3c is inserted into the through hole 3d of the first extension piece 3b. Thereafter, as shown in FIG. 4C, the pressing tool 34 is lowered and pressed from the inner surface of the first extension piece 3b, whereby the first extension piece 3b is folded back and the second extension piece 3b is folded. While falling to the protruding piece 3c side, the second extending piece 3c is brought into close contact with the outer peripheral surface of the caulking portion 3a. In this way, the spread prevention structure 5 is formed, and the terminal crimping structure is completed.

  Further, when the overlapping portion of the first extending piece 3b and the second extending piece 3c is pressed from the outside, the crimper 32 and the pressing tool 34 are once lifted to remove the load, and this overlapping portion is the pressing tool 34. The coaxial cable W to which the braided barrel 3 is attached is rotated so as to be directly below, and the presser 34 is lowered again and pressed while the caulking portion 3a is slightly expanded and stopped.

  The terminal crimping structure can be formed without using such a crimping device 30, but by using the crimping device 30, the caulking portion 3 a is caulked closely to the outer periphery of the coaxial cable W, and the through hole 3 d is formed. A step of inserting the second extended piece 3c into the first, a step of folding back the first extended piece 3b and bringing the second extended piece 3c into close contact with the outer peripheral surface of the caulking portion 3a, and a further overlapped first The step of pressing the extended piece 3b and the second extended piece 3c toward the coaxial cable W can be completed continuously in a single device. In this respect, the above method is excellent in productivity.

  Further, an outer conductor terminal according to a second embodiment that can simplify the manufacturing process and a terminal crimping structure using the outer conductor terminal are shown below.

  FIG. 5 shows the configuration of the outer conductor terminal braided barrel 3 ′ according to the second embodiment, together with the terminal crimping structure and the manufacturing method thereof. The braided barrel 3 ′ is formed in the same shape as the braided barrel 3 of the outer conductor terminal 1 according to the first embodiment. However, as shown in FIG. 5A, the first extended piece 3 b ′ is It differs only in that it is folded back at the boundary with the caulking portion 3a ′, that is, at the position of the edge 3d1 ′ of the through hole 3d ′. The braided barrel 3 ′ is disposed on the outer periphery of the braid reversing portion Wf of the coaxial cable W in a state where the folding is formed first.

  In this way, as shown in FIG. 5B, the second extension piece 3c ′ is formed by simply inserting the second extension piece 3c ′ into the through hole 3d ′ from the peak side of the folded portion. It is possible to form a structure that is locked to the folded portion of the extending piece 3b ′. In particular, when the terminal crimping structure is formed using the crimping apparatus as shown in FIG. 4, it is not necessary to lower the pressing tool 34 in order to form the turn on the first extending piece 3 b ′. The process of pressing down and pressing is performed only once, and the process up to pressing the portion where the first extending piece and the second extending piece indicated by the arrows in FIG. be able to. That is, the terminal crimping structure can be formed by a simpler process than the terminal crimping structure according to the first embodiment.

  In the terminal crimping structure described above, the first extension piece having the through hole is folded back to the outer peripheral surface side of the caulking portion, thereby locking between the first extension piece and the second extension piece. A relationship was formed. However, even when the folding formation location and the folding direction are different, it is possible to form a locking relationship between the first extension piece and the second extension piece, and to prevent the springback from expanding. is there.

  FIG. 6 shows a simplified braided barrel portion in four types of terminal crimping structures in which the folded formation location and the insertion direction of the second extension piece are different. FIG. 6A corresponds to the terminal crimping structure according to the first and second embodiments of FIG. 3C and FIG. 5B, and the first extension piece is the outer periphery of the caulking portion. The second extending piece that is folded back to the surface side and inserted through the through hole is in close contact with the outer peripheral surface of the caulking portion. In FIG.6 (b), the 2nd extension piece is return | folded by the outer peripheral surface side of the crimping part, and the 1st extension piece penetrated by this 2nd extension piece to the through-hole is the outer peripheral surface of the crimping part. It is in close contact with. In FIG. 6C, the second extending piece is folded back to the inner peripheral surface side of the caulking portion, and the first extending piece inserted into the through hole through the second extending piece is the inner portion of the caulking portion. It is in close contact with the peripheral surface. In FIG.6 (d), the 1st extension piece is return | folded by the inner peripheral surface side of the crimping part, and the 2nd extension piece penetrated by the through-hole is closely_contact | adhered to the inner peripheral surface of the crimping part.

  In any terminal crimping structure, the movement of the caulking portion to be expanded is prevented by the locking structure of the first extending piece and the second extending piece. Any terminal crimping structure can be formed using the outer conductor terminal 1 according to the first embodiment shown in FIGS. 1 and 2. Alternatively, as in the case of the second embodiment, the braided barrel can be formed on the outer periphery of the coaxial cable W after the portion of the braided barrel to be folded back in advance.

  From the case of FIGS. 6 (c) and 6 (d), there is no extension piece between the coaxial cable and the caulking portion, and high adhesion can be obtained between the coaxial cable and the caulking portion. The cases (a) and (b) are preferred. In the case of FIG. 6A, as shown in FIG. 5A, if the folded portion is formed in advance, it is continuously with the step of closely contacting the caulking portion to the outer periphery of the coaxial cable. Since the second extending piece can be inserted through the through hole of the first extending piece, the configuration of FIG. 6A is most preferable.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. For example, as described above, the shield conductor does not need to be configured as a braid. Also, in each figure, the braided barrel is caulked on the outer periphery of the braided reversing part, but the braided reversing part is not formed, and the braided barrel can be attached directly on the single layer braid exposed by peeling the sheath. Good. Further, in the above, the outer conductor terminal is attached to the end of the single coaxial cable. However, the (braided) barrel may be connected to the shield conductor formed on the outer periphery by bundling a plurality of insulated wires. it can. Further, the structure of the braided barrel and the structure similar to the terminal crimping structure using the same are not only the barrel for the shield conductor of the outer conductor terminal, but also the insulation barrel of the outer conductor terminal, and further the wire barrel of the inner conductor terminal. It is also possible to apply to.

DESCRIPTION OF SYMBOLS 1 Outer conductor terminal 2 Shell part 3 Braiding barrel 3a Caulking part 3b 1st extension piece 3c 2nd extension piece 3d Through-hole 3d1 (on the caulking part 3a side) Edge 5 Expansion prevention structure

Claims (6)

In the terminal crimping structure in which the barrel of the outer conductor terminal is crimped to the outer periphery of the shield conductor exposed at the end of the shielded electric wire having the shield conductor,
The barrel includes a caulking portion that is in close contact with the outer periphery of the shield conductor and caulked the shielded electric wire, and a plate-like first extension that extends in a circumferential direction of the shielded electric wire from opposite edges of the caulked portion. A piece and a second extension piece,
The first extension piece has an end edge on the boundary with the caulking portion, and a through-hole through which the second extension piece can be inserted is formed,
Said crimping portion, said outer circumference of the shield conductor surrounding over one round, there the shield wire in close contact with the outer periphery of the shield conductor crimped state,
The first extending piece has a folded structure that is folded back to the outer peripheral surface side of the caulked portion at the boundary with the caulked portion, and the second extending piece is formed in the through-hole from the mountain side of the folded structure. The terminal crimping structure is characterized by being in close contact with the outer peripheral surface of the caulking portion in a state of entering and penetrating . Terminal crimping structure according to claim 1, wherein the first extending portion and the second portion of the extension piece are overlapped, characterized in that it is pressed from the outside toward the shielded wire. In the manufacturing method of the terminal crimping structure in which the barrel of the outer conductor terminal is crimped to the outer periphery of the shield conductor exposed at the end of the shielded electric wire having the shield conductor,
The barrel is in close contact with the outer periphery of the shield conductor and caulked with the shielded electric wire, and a first extending piece extending in a circumferential direction of the shielded electric wire from opposite edges of the caulked portion Two extending pieces,
The first extension piece has an end edge on the boundary with the caulking portion, and a through-hole through which the second extension piece can be inserted is formed,
The caulking portion is caulked around the outer circumference of the shield conductor, and
The first extension piece is folded back to the side that becomes the outer peripheral surface of the caulking portion, the second extension piece is inserted into the through-hole from the folded peak side, and the two extension pieces are overlapped with each other. In this state, the second extending piece is brought into close contact with the outer peripheral surface of the caulking portion . After the first extending piece is folded back at the boundary with the caulking portion, the barrel is arranged on the outer periphery of the shield conductor, and the caulking portion is caulked by making one round on the outer periphery of the shield conductor. The manufacturing method of the terminal crimping structure of Claim 3 . After the crimping portion is expanded partially, claim 3 of the portion where the first extending portion and the second extending portion overlap, characterized by pressed from the outside toward the shielded wire Or the manufacturing method of the terminal crimping structure of 4 . In the outer conductor terminal having a barrel that is crimped to the outer periphery of the shield conductor exposed at the end of the shielded electric wire having the shield conductor,
The barrel includes a caulking portion that is in close contact with the outer periphery of the shield conductor and caulked to the shielded electric wire, a plate-like first extending piece and a second extending extending from opposite edges of the caulking portion. And having a piece,
The first extension piece has an end edge on the boundary with the caulking portion, and a through-hole through which the second extension piece can be inserted is formed ,
The outer conductor terminal, wherein the first extension piece is bent at a boundary with the caulking portion .

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