JP6391541B2 - Terminals, electric wires with terminals, wire harnesses, and methods for connecting coated conductors to terminals - Google Patents

Description

  The present invention relates to an electric wire with a terminal used for an automobile or the like.

  Conventionally, in fields such as automobiles, OA equipment, and home appliances, electric wires made of copper-based materials having excellent electrical conductivity have been used as power lines and signal lines. In particular, in the automobile field, the performance and functionality of vehicles are rapidly increasing, and various electric devices and control devices mounted on the vehicle are increasing. Therefore, the electric wire with a terminal used in this tends to increase.

  On the other hand, while environmental problems are attracting attention, the weight reduction of automobiles is required. Therefore, an increase in weight accompanying an increase in the amount of wire harness used becomes a problem. For this reason, it replaces with the copper wire currently used conventionally and the lightweight aluminum electric wire attracts attention.

  Here, a connection terminal is used when connecting such electric wires or in a connection portion such as a device. However, even if it is an electric wire with a terminal using an aluminum electric wire, copper which is excellent in an electrical property may be used for a terminal part for reliability of a connection part. In such a case, an aluminum electric wire and a copper terminal are joined and used.

  However, when different metals are brought into contact, so-called electrolytic corrosion may occur due to the difference in standard electrode potential. In particular, since the standard electrode potential difference between aluminum and copper is large, corrosion on the aluminum side, which is electrically base, progresses due to the influence of water scattering and condensation on the contact portion. For this reason, the connection state between the electric wire and the terminal at the connection portion becomes unstable, and there is a risk that the electrical resistance increases due to an increase in contact resistance or a decrease in wire diameter, and further, the disconnection may occur, resulting in malfunction of the electrical component or stop of the function. is there.

  As a connection structure for such a crimp terminal to an electric wire, for example, a waterproof sheet is provided before and after the conductor crimp part, and the front and rear of the connection part between the conductor crimp part and the conductor exposed part are closed with the waterproof sheet. There is a connection structure (Patent Document 1).

Japanese Patent Laying-Open No. 2015-65148

  Like patent document 1, the junction part of an electric wire conductor and a terminal is sealed by arrange | positioning a water stop sheet | seat before and after the crimping part of an electric wire conductor crimping part and an exposed conductor part, and water etc. to a connection part Intrusion can be prevented.

  On the other hand, when performing a crimping operation using a mold, the terminal of Patent Document 1 is first wrapped and rounded so that one end of the crimping portion and the other end overlap each other. Therefore, a water-stop sheet is provided in the opposing barrel-shaped overlapping portion.

  Here, if the ends of the crimping part are rounded in a state where they overlap each other, the contact surfaces of the ends may rub and the surface of the other sliding surface may be scraped by the edge of one end. is there. For example, there is a possibility that the outer peripheral surface of the end located on the inner peripheral side is scraped off by the edge of the inner edge of the end located on the outer peripheral side. Thus, if the surface of the terminal is scraped off, shavings are generated, which may adversely affect water stoppage, insulation, and the like.

  This invention is made | formed in view of such a problem, and it aims at providing the terminal etc. which can suppress generation | occurrence | production of the shavings of the terminal at the time of crimping | compression-bonding.

In order to achieve the above-described object, a first invention is a terminal connected to a coated conductor, and includes a crimping portion to which the coated conductor is crimped, and a terminal main body, and the crimping portion includes the coated conductor. And a crimping portion for crimping the conductor exposed from the coating portion, and the crimping portion has a substantially U-shaped barrel shape. The end portions of the opposing barrels overlap each other, and in the cross section perpendicular to the longitudinal direction of the terminals, chamfered portions are respectively provided at the edges on the outer surface sides of the opposing ends of the barrels. A chamfered portion is formed on the inner surface side edge of the tip of one of the barrels, and a chamfered portion in the circumferential direction of the barrel from the tip of the barrel in a cross section perpendicular to the longitudinal direction of the terminal The formation range of the The chamfered portion formed at the edge on the outer surface side of the tip of the barrel is larger than the chamfered portion formed at the edge on the inner surface side of the tip of one of the barrels, and on the inner surface side of the tip of one of the barrels. The chamfered portion formed on the edge portion is linear or rounded, and the size of the chamfered portion formed on the inner surface side edge of the barrel is equal to that of the barrel. The terminal is characterized by being 10% to 70% of the plate thickness .

You may form a chamfering part in the edge part of the inner surface side of the front-end | tip of both the said barrels which oppose. Further, in only one of the opposing barrels, a chamfered portion may be formed at the inner edge of the barrel tip. In addition, the chamfered portion formed on the outer surface side edge of the barrel tip is linear, and the chamfered portion formed on the inner surface edge is an R chamfered shape. Also good.

The chamfered portions formed at an edge portion of the inner surface side of the distal end of one of the barrel is straight and the angle of that may be a 15 ° to 75 ° with respect to said barrel.

Resin may be disposed on the inner surface of the crimping portion at a position away from the edge of the coated crimping portion by the formation range of the chamfered portion.

  According to the first invention, a linear chamfering or an R-shaped chamfering portion is formed at the inner edge of the tip of one of the opposing barrels, and the barrel tip having the chamfering portion is formed on the outer periphery. By arrange | positioning at the side, it can suppress that the surface of the barrel front-end | tip of an inner surface side is scraped by the inner edge part of an outer peripheral side. For this reason, generation | occurrence | production of shavings can be suppressed.

  In addition, by forming a chamfered portion on the outer edge of the other barrel tip, it is possible to prevent the outer peripheral barrel tip from being scraped by the inner peripheral edge. .

  Here, by forming the chamfered portion on the inner surface side edge portion of both barrel tips, generation of shavings can be suppressed more reliably.

  At this time, if the size of the chamfered portion formed at the inner edge of the barrel tip is 10 to 70% of the barrel thickness, the effect of suppressing the generation of shavings can be obtained more reliably. be able to.

  In addition, when a straight chamfer is formed at the inner edge of the barrel tip, the angle of the chamfered portion is set to 15 ° to 75 ° with respect to the barrel, so that the cutting can be performed more reliably. The effect of suppressing generation of waste can be obtained.

  In addition, the coated crimping part for crimping the coated part of the coated conductive wire and the conductive wire crimping part for crimping the conductive wire exposed from the coated part are integrally formed, and the resin is arranged on the inner surface, thereby ensuring the water-stopping property. be able to.

A second invention is a pin, a wire with a coated conductive wire is connected to terminals, the terminal includes a crimping portion to which the coated conductive wire is crimped, and a terminal body, wherein the crimping section A coated crimping part for crimping the coated part of the coated conductive wire and a conductive wire crimping part for crimping the conductive wire exposed from the coated part are integrally formed, and the crimped part has a substantially U-shaped barrel shape. And, at the time of crimping, the end portions of the opposing barrels overlap each other, and in the cross section perpendicular to the longitudinal direction of the terminals, on the outer surface side edges of the opposing ends of the barrels, respectively, A chamfered portion is formed, and a chamfered portion is formed on an inner edge of the barrel tip, and a circumferential direction of the barrel from the tip of the barrel in a cross section perpendicular to the longitudinal direction of the terminal The formation range of the chamfered portion in Chamfered portion formed on the edge of the outer surface of the barrel of the tip is greater than the chamfered portion formed on the edge of the inner surface side of the distal end of one of the barrel, the inner surface edge of the front end of the barrel One barrel where the chamfered portion is formed in the part is located outside, the other barrel is located inside, the barrels overlap each other beyond the chamfered part of the barrel It is the electric wire with a terminal characterized.

The chamfered portion formed on the inner surface side edge of the tip of one of the barrels has a linear shape or an R chamfered shape, and the size of the chamfered portion is 10% to the thickness of the barrel. It may be 70%.

  According to the second aspect of the invention, when the barrel tips are overlapped and rounded, the chamfered portion is formed at the inner edge of the outer barrel tip, so that generation of shavings can be suppressed. For this reason, the deterioration of the water stoppage by shavings etc. can be suppressed.

  Moreover, since no shavings are generated and the connecting portion between the electric wire conductor and the crimping portion can be reliably sealed, the occurrence of electrolytic corrosion can be suppressed even when different metals are connected.

  A third invention is a wire harness in which a plurality of electric wires with terminals according to the second invention are bundled.

  In the present invention, a plurality of electric wires with terminals can be bundled and used.

A fourth invention is a method for connecting a coated conductor and a terminal, wherein the terminal has a crimping portion to which the coated conductor is crimped, and a terminal body, and the crimping portion is coated with the coated conductor. A cover crimping part for crimping the part and a conductor crimping part for crimping the conductor exposed from the coating part are integrally formed, and the crimping part has a substantially U-shaped barrel shape, and is opposed to each other at the time of crimping. The end portions of the barrels that overlap each other are overlapped, and chamfered portions are respectively formed on the outer surface side edges of the opposite ends of the barrels. A chamfered portion is formed at the edge, and the range of formation of the chamfered portion in the circumferential direction of the barrel from the tip of the barrel in the cross section perpendicular to the longitudinal direction of the terminal is the outer surface of the tip of one of the barrels The chamfer formed on the side edge is Greater than chamfered portion formed on the edge of the inner surface side of the distal end of the barrel, the tip of the coated conductive wire is disposed in said crimping portion, when crimping the insulated conductive wires in the crimp portion, the distal end of the barrel One barrel where the chamfered portion is formed on the inner side edge of the barrel is located outside, the other barrel is located inside, beyond the chamfered portion of each barrel, the barrel This is a method for connecting a coated conductor and a terminal, characterized in that they are overlapped with each other.

  According to the 4th invention, when the front-end | tips of a barrel are piled up and rounded, since a chamfering part is formed in the inner edge part of an outer barrel front-end | tip, it can suppress that shavings arise. For this reason, the deterioration of the water stoppage by shavings etc. can be suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, the terminal etc. which can suppress generation | occurrence | production of the shavings of the terminal at the time of crimping | compression-bonding can be provided.

The perspective view of the terminal 1. FIG. It is sectional drawing of the terminal 1, Comprising: The AA sectional view taken on the line of FIG. (A) is the B section enlarged view of FIG. 2, (b) is a figure which shows other embodiment of (a). The perspective view of the state which has arrange | positioned the covering conducting wire 17 to the terminal 1. FIG. The perspective view of the state which rounded the crimping | compression-bonding part 5. FIG. (A)-(d) is a figure which shows the process of rounding the crimping | compression-bonding part 5. FIG. The perspective view of the state which compressed the crimping | compression-bonding part 5. FIG. (A), (b) is a figure which shows other embodiment. The expansion | deployment top view of the terminal 1a.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a terminal 1 connected to a coated conductor. The terminal 1 is made of, for example, copper or a copper alloy, and includes a terminal body 3 and a crimping portion 5. The terminal body 3 is formed by forming a plate-shaped material having a predetermined shape into a cylindrical body having a rectangular cross section. The terminal body 3 has an elastic contact piece formed by folding a plate-shaped material into a rectangular cylinder. The terminal body 3 is connected by inserting a male terminal or the like from the front end.

  The crimping part 5 is a part to be crimped to the coated conductor, and has a barrel shape in which a cross-sectional shape perpendicular to the longitudinal direction of the terminal 1 is substantially U-shaped. The crimping part 5 includes a lead crimping part 7 for crimping the lead part on the tip side of the coated conductor and a covering crimping part 9 for crimping a part of the covering part of the coated conductor. The lead wire crimping part 7 and the covering crimping part 9 are integrally formed.

  A serration 11 is provided in a part of the inner surface of the conductor crimping portion 7 in the width direction (circumferential direction when the crimping portion 5 described later is rounded). By forming the serrations 11 in this manner, when the conducting wire is crimped, the oxide film on the surface of the conducting wire can be easily broken, and the contact area with the conducting wire can be increased.

  2 is a cross-sectional view of the pressure-bonding portion 5 (covered pressure-bonding portion 9), and is a cross-sectional view taken along line AA in FIG. As described above, the crimping portion 5 has a barrel shape in which a cross-sectional shape perpendicular to the longitudinal direction of the terminal 1 is substantially U-shaped. In the following description, the U-shaped opposing side wall portions of the terminal 1 are referred to as a pair of barrels 13a and 13b. That is, the barrels 13a and 13b near the end in the width direction of the terminal 1 (direction perpendicular to the longitudinal direction of the terminal 1) face each other.

  Chamfered portions 23b and 23c are formed at the outer side edge portions of the ends of the pair of barrels 13a and 13b, respectively. Further, a chamfered portion 23a is formed on the inner surface side edge of one barrel 13a. The chamfers 23a, 23b, and 23c are linear chamfers (for example, C chamfers).

  Note that the chamfered portions 23b and 23c are not necessarily required, but the chamfered portion 23b is formed at least at the outer edge of the tip of the barrel 13b facing the barrel 13a where the chamfered portion 23a is formed. It is desirable. Further, it is desirable to form chamfered portions 23b and 23c in both of the pair of barrels 13a and 13b in order to smoothly round the crimped portion 5 at the time of crimping described later.

  FIG. 3A is an enlarged view of a portion B in FIG. The size (D in the figure) of the chamfered portion 23a formed at the inner edge of the end of the barrel 13a is desirably 10% to 70% of the plate thickness (C in the figure) of the barrel 13a. Here, the size of the chamfered portion 23a refers to a formation range of the chamfered portion 23a in the thickness direction of the barrel 13a from the inner surface of the barrel 13a in a cross section perpendicular to the longitudinal direction of the terminal 1.

  When the size of the chamfered portion 23a is less than 10% of the plate thickness or the size of the chamfered portion 23a exceeds 70% of the plate thickness, the effect of forming the chamfered portion 23a is small.

  Further, the angle of the chamfered portion 23a with respect to the barrel 13a (F in the figure) is desirably 15 ° to 75 °. Here, the angle of the chamfered portion 23a with respect to the barrel 13a refers to the formation angle of the chamfered portion 23a with respect to the center line (E in the drawing) of the barrel 13a in the cross section perpendicular to the longitudinal direction of the terminal 1. Say.

  Even if the angle of the chamfered portion 23a is less than 15 ° or exceeds 75 °, the effect of preventing the later-described barrel surface from being scraped is small by forming the chamfered portion 23a.

  In the present invention, the chamfer 23a is not limited to a linear chamfer. For example, as shown in FIG. 3B, the chamfered portion 23a may have an R chamfer shape. Even in this case, the size (D in the drawing) of the chamfered portion 23a formed at the inner edge of the barrel 13a is 10% to 70% of the plate thickness (C in the drawing). It is desirable. In the following description, the shape of the chamfered portion is described as being a straight chamfer, but the chamfered portion of any portion may be an R chamfered shape.

  Next, a method for connecting the coated conductor and the terminal 1 will be described. First, as shown in FIG. 4, the covering portion 21 having a predetermined length at the tip of the covering conducting wire 17 is removed to expose the conducting wire 19. Note that the conductive wire 19 of the covered conductive wire 17 is preferably made of aluminum or an aluminum alloy.

  Next, the tip of the coated conducting wire 17 is disposed on the crimping part 5. Under the present circumstances, the conducting wire 19 exposed from the coating | coated part 21 is arrange | positioned at the conducting wire crimping | compression-bonding part 7 (formation part of the serration 11), and the coating | coated part 21 is arrange | positioned at the covering crimping | compression-bonding part 9. FIG.

  Next, as shown in FIG. 5, in the crimping portion 5, the plate-shaped material is rounded so as to form a cylindrical body having a circular cross section so that the tips of the opposing barrels 13 a and 13 b overlap each other. That is, the terminal 1 is an overlap type in which the ends of the opposing barrels 13a and 13b overlap each other during crimping. Under the present circumstances, the crimping | compression-bonding part 5 is piled up and rounded so that the barrel 13a in which the chamfering part 23a of the inner surface edge part mentioned above was formed may be located outside. In addition, when the crimping | compression-bonding part 5 is rounded, the diameter of the covering crimping part 9 is larger than that of the conductor crimping part 7.

  FIG. 6A to FIG. 6D are diagrams showing detailed steps when the crimping portion 5 is rounded. In order to round the crimping part 5, upper and lower molds 27a, 27b are used. First, as shown to Fig.6 (a), the terminal 1 and the covering conducting wire 17 are arrange | positioned on the lower metal mold | die 27b, and the metal mold | die 27a is dropped from upper direction (arrow H in the figure).

  At this time, the outer edges of the tips of the barrels 13a and 13b are in contact with the inner surface of the mold 27a. Since the chamfered portions 23b and 23c are formed on the outer edge portions of the barrels 13a and 13b, the tips of the barrels 13a and 13b are smoothly guided into the mold 27a. For this reason, in the conventional terminal, a chamfered portion may be formed on the outer surface side of the barrel, which is a contact portion with the mold, but a chamfered portion is formed on the inner surface of the barrel that does not contact the mold. It has never happened.

  Further, when the mold 27a is lowered, as shown in FIG. 6B, the tips of the barrels 13a and 13b come into contact with the upper part of the inner surface of the mold 27a. For this reason, the barrels 13a and 13b are gradually rounded according to the shape of the mold 27a.

  Further, when the mold 27a is lowered, as shown in FIG. 6C, the tips of the barrels 13a and 13b come into contact with each other. At this time, the inner shape of the mold 27a is designed to guide the tips of the barrels 13a and 13b so that the barrel 13a is on the outside and the barrel 13b is on the inside. For this reason, the barrels 13a and 13b are rounded so that the inner surface side of the barrel 13a and the outer surface side of the barrel 13b are in contact with each other.

  At this time, a chamfered portion 23a is formed on the inner edge portion of the barrel 13a positioned on the outer side, and a chamfered portion 23b is formed on the outer edge portion of the barrel 13b positioned on the inner side. As a guide, the barrel 13a is smoothly guided to the outside of the barrel 13b. That is, one barrel 13a having the chamfered portion 23a formed at the inner edge of the barrel tip can be positioned outside and the other barrel 13b can be positioned inside and overlap each other.

  When the mold 27a is further lowered, as shown in FIG. 6D, the crimping portion 5 is further rounded while the inner peripheral surface of the outer barrel 13a and the outer peripheral surface of the inner barrel 13b slide. . At this time, a chamfered portion 23a is formed at the inner edge portion of the tip of the outer barrel 13a. For this reason, it is possible to prevent the outer peripheral surface of the inner barrel 13b from being scraped off at the edge of the inner edge of the barrel 13a when the chamfered portion 23a is not formed.

  Further, a chamfered portion 23b is formed at the outer edge portion of the tip of the inner barrel 13b. For this reason, when the chamfer 23b is not formed, it is possible to prevent the inner peripheral surface of the outer barrel 13b from being scraped off at the edge of the outer edge at the tip of the barrel 13b.

  Thus, in this invention, it can suppress that a mutual sliding surface is shaved by the edge of a front-end | tip in the overlap part of barrels 13a and 13b, for example, generating a thread-like shavings.

  Next, as shown in FIG. 7, the crimping portion 5 is compressed together with a mold (not shown) to crimp the covering portion 21 of the coated conductor 17 with the covering crimping portion 9, and the conductor crimping portion 7. Then, the conductive wire 19 exposed from the covering portion 21 is crimped. As described above, one barrel 13a having a chamfered portion 23a formed at the edge on the inner surface side of the barrel tip is positioned on the outside, and the other barrel 13b is positioned on the inner side to obtain the terminal-attached electric wires 20 that overlap each other. it can.

  As described above, according to the present embodiment, when the crimping portion 5 is rounded, it is possible to prevent the surfaces of the barrels 13a and 13b from being shaved and generating shavings. For this reason, it can suppress that shavings have a bad influence on watertightness, such as a metal overlap part.

  Next, a second embodiment will be described. FIG. 8A is a cross-sectional view of a terminal according to the second embodiment and corresponds to FIG. In the following description, components having the same functions as those of the terminal 1 and the like are denoted by the same reference numerals as those in FIGS. 1 to 7 and redundant description is omitted.

  In the example shown in FIG. 8A, a chamfer 23d is formed on the inner edge side of the tip of the barrel 13b. That is, when the crimping portion 5 is rounded, the chamfered portion 23d is formed at the inner edge portion of the barrel 13b formed inside. In this case, when the barrels 13a and 13b are overlapped, the chamfered portion 23d is not located in the overlapping portion between the barrels 13a and 13b, but the chamfered portion 23d is connected to the conductive wire 19 of the coated wire 17 inside. There is a part that slides. For this reason, when the chamfered portion 23d is not formed, it is possible to suppress the part of the outer peripheral surface of the conducting wire 19 from being scraped off at the edge of the inner edge portion of the tip of the barrel 13b.

  Thus, in this invention, even if it forms the chamfer 23d in the inner edge part of the front-end | tip of the inner barrel 13b, generation | occurrence | production of shavings can be suppressed. That is, the chamfered portion may be formed at the edge portion on the inner surface side of the tip of at least one barrel 13a or barrel 13b facing each other.

  Moreover, as shown in FIG.8 (b), you may form chamfering parts 23a and 23d in the edge part of the inner surface side of the front-end | tip of both the barrels 13a and 13b which oppose, respectively. By doing in this way, it can suppress that the outer peripheral surface of the barrel 13b and the conducting wire 19 are shaved.

  According to the second embodiment, an effect similar to that of the first embodiment can be obtained. As described above, in the present invention, the chamfered portion may be formed at the edge portion on the inner surface side of the tip of at least one of the opposed barrels 13a or 13b, and desirably both the opposed barrels 13a and 13b. It is preferable that chamfered portions 23a and 23d are respectively formed at the inner edge side edge of the tip. Further, it is desirable that chamfered portions 23b and 23c are formed at the outer edge portions of the tips of both opposing barrels 13a and 13b, respectively.

  Next, a third embodiment will be described. FIG. 9 is a developed plan view of the terminal 1a according to the third embodiment. The terminal 1a has substantially the same configuration as the terminal 1, but differs in that the resin 25 is disposed.

  On the inner surface side of the crimping portion 5, the resin 25 is disposed on substantially the entire surface other than the serration 11 (the portion that conducts the conducting wire 19 and the terminal 1 a). The resin 25 is, for example, polyamideimide. The resin 25 may be provided on a predetermined portion of the terminal 1a by coating, or a resin sheet previously formed in a predetermined shape may be attached to a predetermined position. Further, as illustrated, the resin 25 may be arranged in a developed state before being molded into a terminal shape, or may be arranged after being molded into a terminal shape.

  The resin 25 is arranged so as not to protrude from the edge of the crimping part 5. Specifically, on one side end portion side of the crimping portion 5, the chamfered portion 23 a formed on the inner surface side of the crimping portion 5 is disposed at a site away from the edge portion.

  When the crimping part 5 is rounded in a state where the resin 25 is arranged, the resin 25 is arranged between the barrel 13b on the inner peripheral side and the barrel 13a on the outer peripheral side in the overlapping part of the barrels 13a and 13b constituting the crimping part 5. Is done. For this reason, the water stoppage can be ensured by the resin 25.

  In this state, when the crimping part 5 is compressed and the terminal and the coated conductor 17 are crimped, the resin 25 is caused to protrude outside at the overlapping part of the opposing barrels 13a and 13b constituting the crimping part 5. Can do. That is, when appropriate pressure bonding is performed, the resin 25 can be protruded from the edge portion along the overlapping portion of the barrels 13 a and 13 b formed along the longitudinal direction of the pressure bonding portion 5. .

  Similarly, the resin 25 can be protruded outside at the end of the crimping portion 5 on the terminal body 3 side where the rounded crimping portion is crushed and sealed. That is, when appropriate crimping is performed, the resin 25 can be protruded to the outside at the overlapping portion between the barrels 13 a and 13 b at the end of the crimping portion 5 on the terminal body 3 side.

  Thus, the covered conductor 17 is crimped by the crimping part 5 of the terminal 1, and the terminal-attached electric wire 20 in which the resin 25 protrudes to the outside in the overlapping part of the barrels 13 a and 13 b constituting the crimping part 5 is obtained. Can do.

  According to the third embodiment, an effect similar to that of the first embodiment can be obtained. Thus, in this invention, since resin 25 is arrange | positioned in the overlapping part of metals, such as between barrels 13a and 13b, a water stoppage can be ensured reliably. Further, the quality of the pressure bonding can be determined from the amount of protrusion of the resin 25 after the pressure bonding. For this reason, a metal overlap part can be sealed more reliably.

  Further, since the resin 25 does not protrude from the edge portion of the terminal 1 before crimping, the resin 25 can be prevented from being damaged during handling or crimping.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

  In the above-described embodiment, the female terminal has been described. However, the male terminal can be used similarly. Moreover, a plurality of electric wires with terminals according to the present invention can be bundled and used as a wire harness.

1, 1a ......... Terminal 3 ......... Terminal body 5 ......... Crimping part 7 ......... Conductor crimping part 9 ......... Coating crimp part 11 ......... Serration 13a, 13b ......... Barrel 17 ......... Coating Conductor 19 ......... Conductor 20 ......... Electric wire with terminal 21 ......... Cover part 23a, 23b, 23c, 23d ......... Chamfer 27a, 27b ......... Mold

Claims (10)

A terminal connected to the coated conductor,
A crimping portion to which the coated conductor is crimped, and a terminal body;
The crimping part is integrally formed with a coating crimping part that crimps the coating part of the coated conductor and a conductor crimping part that crimps the conductor exposed from the coating part,
The crimping part has a substantially U-shaped barrel shape, and at the time of crimping, is an overlap type in which ends of opposing barrels overlap each other,
In the cross section perpendicular to the longitudinal direction of the terminal, chamfered portions are respectively formed on the outer surface side edges of the opposite ends of the barrels, and a surface is formed on the inner surface side edge of the one barrel end. The take part is formed,
From the tip of the barrel in the cross section perpendicular to the longitudinal direction of the terminal, the formation range of the chamfered portion in the circumferential direction of the barrel is:
The chamfered portion formed on the outer surface side edge of the one end of the barrel is larger than the chamfered portion formed on the inner surface side edge of the one barrel end,
The chamfered portion formed on the inner surface side edge of the tip of one of the barrels is linear or R chamfered,
The terminal characterized in that a size of the chamfered portion formed at an inner edge of the barrel tip is 10% to 70% of the plate thickness of the barrel.   The terminal according to claim 1, wherein a chamfered portion is formed at an edge portion on the inner surface side of both ends of the barrels facing each other.   2. The terminal according to claim 1, wherein a chamfered portion is formed at an edge portion on the inner surface side of the tip of the barrel only in one of the opposing barrels. The chamfered portion formed on the outer surface side edge of the tip of the barrel is linear, and the chamfered portion formed on the inner surface side edge is an R chamfered shape. The terminal according to any one of claims 1 to 3. The chamfered portions formed at an edge portion of the inner surface side of the distal end of one of the barrel is straight and the angle of that is characterized by a 15 ° to 75 ° with respect to said barrel according The terminal according to any one of claims 1 to 3 .   6. The resin according to claim 1, wherein a resin is disposed on an inner surface of the crimping portion at a position separated from an edge portion of the covering crimping portion by a formation range of the chamfered portion. Terminal described in. A terminal-attached electric wire to which a terminal and a coated conductor are connected,
The terminal has a crimping portion to which the coated conductor is crimped, and a terminal body,
The crimping part is integrally formed with a coating crimping part that crimps the coating part of the coated conductor and a conductor crimping part that crimps the conductor exposed from the coating part,
The crimping part has a substantially U-shaped barrel shape, and at the time of crimping, is an overlap type in which ends of opposing barrels overlap each other,
In the cross section perpendicular to the longitudinal direction of the terminal, chamfered portions are respectively formed on the outer surface side edges of the opposite ends of the barrels, and a surface is formed on the inner surface side edge of the one barrel end. The take part is formed,
From the tip of the barrel in the cross section perpendicular to the longitudinal direction of the terminal, the formation range of the chamfered portion in the circumferential direction of the barrel is:
The chamfered portion formed on the outer surface side edge of the one end of the barrel is larger than the chamfered portion formed on the inner surface side edge of the one barrel end,
One barrel where the chamfered portion is formed on the inner surface side edge of the tip of the barrel is located outside, the other barrel is located inside, beyond the chamfered portion of each barrel The terminal-attached electric wire, wherein the barrels overlap each other.   The chamfered portion formed on the inner surface side edge of the tip of one of the barrels has a linear shape or an R chamfered shape, and the size of the chamfered portion is 10% to the thickness of the barrel. It is 70%, The electric wire with a terminal of Claim 7 characterized by the above-mentioned.   A wire harness in which a plurality of electric wires with terminals according to claim 7 or 8 are bundled. A method of connecting a coated conductor and a terminal,
The terminal has a crimping portion to which the coated conductor is crimped, and a terminal body,
The crimping part is integrally formed with a coating crimping part that crimps the coating part of the coated conductor and a conductor crimping part that crimps the conductor exposed from the coating part,
The crimping part has a substantially U-shaped barrel shape, and at the time of crimping, is an overlap type in which ends of opposing barrels overlap each other,
A chamfered portion is formed on each outer edge of the opposite ends of the barrels,
A chamfered portion is formed on the inner edge of the tip of one of the barrels,
From the tip of the barrel in the cross section perpendicular to the longitudinal direction of the terminal, the formation range of the chamfered portion in the circumferential direction of the barrel is:
The chamfered portion formed on the outer surface side edge of the one end of the barrel is larger than the chamfered portion formed on the inner surface side edge of the one barrel end,
When the tip of the coated conductor is disposed in the crimping portion, and the crimping portion is crimped with the coated conductor, the one barrel having the chamfered portion formed on the inner edge of the barrel tip is attached to the barrel. A method of connecting a coated conductor and a terminal, wherein the method comprises: positioning the other barrel on the outside, positioning the other barrel on the inner side, and overlapping the barrels with each other beyond the chamfered portions of the barrels.

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