JP2013243106A - Terminal, and electric wire with terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal that is less likely to be corroded and has a small electric resistance, and to provide an electric wire with the terminal.SOLUTION: An electric wire with a terminal comprises: an electric wire obtained by coating a core wire made of aluminum or aluminum alloy with insulation coating; and a terminal having a barrel part pressure-bonded to the core wire exposed from a terminal of the electric wire, and a connector conductively connected with a partner side terminal. The terminal is configured by: a terminal main body made of iron or an iron alloy; and a conductive member at least arranged between the barrel part and the core wire and between the connector and the partner side terminal, and consisting of a metal material whose ionization tendency is equivalent to that of the core wire or closer to that of the core wire rather than that of the terminal main body and whose electric resistance is smaller than that of the terminal main body.

Description

  The present invention relates to a terminal and an electric wire with a terminal.

  As an electric wire with a terminal mounted on a vehicle such as an automobile, for example, a configuration in which a crimping piece of a terminal is crimped and electrically connected to a core wire that is exposed by peeling off an insulation coating from an end of the electric wire is known. Yes.

  In recent years, from the viewpoint of weight reduction of vehicles and the like, there is an increasing demand for so-called aluminum electric wires in which a core wire made of aluminum or aluminum alloy [also referred to as aluminum (alloy)] is coated with an insulating coating. As an electric wire with a terminal formed by connecting such an aluminum electric wire, for example, the one described in Patent Document 1 is known.

JP 2010-10013 A

  Copper that has been conventionally used as a material for the terminals has the advantages of excellent strength, easy bending, and high electrical conductivity.

  The terminal made of copper (alloy) is generally formed with a tin plating layer on the surface, but the electric wire with a terminal provided with a terminal made of a copper (alloy) plate on which the tin plating layer is formed as described above. Moisture containing salt enters the contact area (contact area of dissimilar metals) between the tin-plated layer and the copper (alloy) base material layer in the environment where the vehicle is exposed to sea breeze, high temperature and humidity, etc. Then, tin may elute due to a potential difference between tin and copper.

  When the elution of tin progresses and the base layer made of copper (alloy) is exposed, the core wire and the base material layer come into contact with each other, due to the potential difference between the aluminum contained in the core wire and the copper contained in the base material layer. There is a concern that the dissolution of tin and the dissolution of tin are promoted, and the corrosion of the terminal proceeds rapidly.

  In view of the above circumstances, the applicant has examined the use of iron or an iron alloy, which is a metal having a small potential difference from aluminum contained in the core wire and tin contained in the plating layer, as the base material of the terminal. However, since iron and iron alloys have higher electrical resistance than copper and copper alloys that have been used in the past, they can not be used because they generate large amounts of heat when used in places with large capacities such as power circuits for electric vehicles. There was a problem.

  The present invention has been completed based on the above circumstances, and an object of the present invention is to provide a terminal and a terminal-attached electric wire that are not easily corroded and have low electric resistance.

  This invention made in order to solve the said subject is a terminal which has a connection part connected to the barrel part and the other party terminal which are crimped | bonded to the aluminum wire or aluminum alloy core wire exposed from the terminal of an electric wire so that conduction | electrical_connection is carried out. A terminal main body made of iron or an iron alloy, at least between the barrel portion and the core wire, and between the connection portion and the mating terminal, the ionization tendency is equal to the core wire or the It is characterized in that it is composed of a conductive member that is closer to the core wire than the terminal body and has an electric resistance made of a metal material smaller than that of the terminal body.

  According to the present invention described above, since the terminal body is made of iron or an iron alloy, it is made of aluminum or aluminum alloy as compared with the copper or copper alloy conventionally used as the material of the terminal. The potential difference from the core wire is reduced. As a result, it is possible to obtain an effect that the corrosion hardly proceeds even when moisture is present. Moreover, the connection part (barrel part) with the core wire of the terminals and the connection part (connection part) with the mating terminal have the same ionization tendency as the aluminum or aluminum alloy used for the core wire or the terminal body ( Since a conductive member made of a metal material that is closer to iron or an iron alloy and has a smaller electrical resistance than the terminal body is disposed, current flows mainly to the conductive member when energized, resulting in a large capacity. Even when current flows, the amount of heat generated is small.

  The material constituting the conductive member is not limited as long as the ionization tendency is the same as that of the core wire or closer to the core wire than the terminal body, and the electrical resistance is smaller than that of the terminal body. For example, aluminum (alloy), magnesium (alloy) In particular, it is preferable to use aluminum or aluminum alloy. As the aluminum alloy, for example, 1000 series having high conductivity is desirable.

  As the iron alloy used as the material of the terminal body, for example, carbon steel, weather resistant steel, or stainless steel is preferable. For example, the weather resistance defined in Fe-18Cr alloy, Fe-12Cr alloy, Fe-8Cr alloy, JIS G3114 is used. Iron alloys used as heat resistant hot rolled steel, ferritic stainless steel such as SUS405, SUS410L, SUS430, SUS434, martensitic stainless steel such as SUS403, SUS410, SUS416, SUS431, austenitic stainless steel such as SUS301, SUS304, SUS305, etc. It is done. Of these, weathering steel and ferritic stainless steel having a corrosion potential close to that of an aluminum or aluminum alloy core wire are preferred.

  Further, a tin plating layer may be provided on the surface of the terminal body, and further, an underlayer made of zinc or a zinc alloy may be provided under the tin plating layer. Since the corrosion potential of zinc and zinc alloys is closer to that of aluminum contained in the core wire than to iron contained in the terminal body, when such a foundation layer is provided, the foundation layer acts as an anticorrosion layer even if water enters. Thus, the terminal body is protected by sacrificial protection, and the progress of corrosion can be suppressed. Examples of such an underlayer include zinc alloys such as zinc (Zn) and Zn—Ni alloys, brass (Cu—Zn alloys), and the like. A Zn—Ni alloy is particularly preferable because it has a great effect of delaying corrosion.

  Moreover, when a tin plating layer is provided on the surface of the conducting member, the surface of the conducting member is hardly oxidized, and the conductivity can be maintained.

  Further, in the electric wire with terminal, the conductive member is arranged so as to be offset toward the connecting portion side in the width direction of the barrel portion, and the connecting portion side in the width direction of the barrel portion is connected to the core wire in a state where the barrel portion is crimped to the core wire. It is good also as a high compression part and it is good also as a low compression part with respect to a core wire on the opposite side of a connection part.

  With such a configuration, when the connecting portion side in the width direction of the barrel portion (wire axial direction) is thicker than the opposite side, the core wire is highly compressed when the barrel portion is crimped to the core wire. In this portion, the oxide film formed on the surface of the core wire is firmly broken, and the core wires and the core wire and the barrel portion are in a good conductive state. On the other hand, the side opposite to the connecting portion in the width direction of the barrel portion (the axial direction of the electric wire) is thinner than the connecting portion side, so that the core wire is in a low compression state (low compression portion). Therefore, in this part, the holding force with respect to the core wire of the barrel part can be increased.

  ADVANTAGE OF THE INVENTION According to this invention, it is hard to corrode and can provide the terminal and electric wire with a terminal with small electrical resistance.

Side sectional drawing of the electric wire with a terminal of Embodiment 1 of the present invention Similarly, a plan view of the electric wire with terminal Similarly, side sectional view of the terminal Similarly, terminal plan Similarly, AA cross-sectional view of FIG. Similarly front view of terminals BB sectional view of FIG. 1 (high compression part) Similarly CC sectional view of FIG. 1 (low compression part) Sectional side view of the electric wire with a terminal of Embodiment 2 of the present invention Similarly, a plan view of the electric wire with terminal Similarly, side sectional view of the terminal Similarly, terminal plan DD sectional view of FIG. 11 Side sectional view showing a state in which a male terminal and a female terminal are fitted together Sectional side view of the electric wire with a terminal metal fitting of Embodiment 3 of the present invention

<Embodiment 1>
An electric wire 10 with a terminal according to a first embodiment embodying the present invention will be described with reference to FIGS. In the following description, the left side in FIGS. 1 and 2 is the front and the right side is the rear. Further, the upper side in FIG. 1 is the upper side and the lower side is the lower side.

  As shown in FIGS. 1 and 2, the terminal-attached electric wire 10 of the present embodiment is obtained by electrically connecting a female terminal 11 and an electric wire 40.

  As shown in FIGS. 3 to 6, the terminal 11 includes a connecting portion 12 that is connected to a tab (an example of a mating terminal) of a male terminal that is a mating side, and an axial direction from the connecting portion 12. A pair of mounting portions 17 on which the continuous electric wires 40 are mounted, and a pair of caulking and crimping to the core wires 41 of the electric wires 40 that extend from both edges of the mounting portions 17 and are mounted on the mounting portions 17. A pair of insulation barrels 19 that are provided side by side with wire barrels 18 and 18 (an example of a barrel portion) and are crimped to a portion covered with an insulating coating 42 at the end of the wire 40. , 19 and a conducting member 30 described later.

  The connecting portion 12 is formed into a rectangular tube shape that opens forward and backward by bending a metal plate having a predetermined shape, and rises from a bottom wall 13 that extends forward and backward and from both side edges of the bottom wall 13. A pair of side walls 14, 14, a ceiling wall 15 that continues from one side wall 14 and faces the bottom wall 13, and an outer wall 16 that continues from the other side wall 14 and overlaps the outside of the ceiling wall 15. From the front end of the bottom wall 13, an elastic contact piece 20 capable of elastic contact with a tab (not shown) of a male terminal inserted from the front has a tongue piece 20 </ b> A extending forward from the bottom wall 13. It is provided by folding back at the front end position of the connection portion 12 and then folding back at a substantially central position in the length direction of the connection portion 12.

  The bottom wall 13 is formed with a locking hole 21 that can be locked by entering a lance provided in the cavity when the terminal 11 is accommodated in the cavity of the housing (not shown). Yes. Further, a pair of stabilizers 22 functioning as guides for the insertion operation into the cavity and the like are protruded from both side edges of the locking hole 21 (lower ends of the side walls 14, 14).

  A recess 17A for breaking the oxide film formed around the core wire 41 when the electric wire 40 is crimped is provided on the surface of the mounting portion 17 on which the electric wire 40 is disposed (the surface disposed on the upper side in FIG. 1). A plurality of recesses are provided in a direction perpendicular to the axial direction of the electric wire 40 (see FIG. 4).

  The terminal body 11A is made of a steel plate in which a surface of a metal plate made of iron or an iron alloy is coated with a zinc-nickel base (an example of a base layer) and then a plating layer (not shown) containing tin or a tin alloy is formed. . The thickness of the plating layer is preferably 0.4 μm or more. This is because if the plating layer is too thin, the plating layer is peeled off and easily corroded, and the electrical connection stability of the male-female fitting portion cannot be ensured.

  As shown in FIGS. 1 and 2, the electric wire 40 placed on the placement portion 17 of the terminal 11 and crimped by the wire barrels 18 and 18 is formed by twisting a plurality of metal strands made of aluminum or aluminum alloy. And an insulating coating 42 made of a synthetic resin that covers the outer periphery of the core wire 41. The terminal of the electric wire 40 is in a state where the insulation coating 43 is peeled off and the core wire 41 is exposed. The electric wire 40 is connected to the terminal 11 with the end of the exposed core wire 41 facing the connecting portion 12 side.

  Now, in this embodiment, the conduction member 30 is provided from a part of the placement portion 17 of the terminal main body 11A to the connection portion 12 (see FIGS. 3 to 6). The conducting member 30 is made of a metal plate made of aluminum or aluminum alloy having a tin plating layer on the surface, and is wide so that one end side (the right side in FIG. 4) of the long rectangular shape has a T shape. It has the wide part 31 which became. The width of the wide portion 31 is set to a width that allows the core wire 41 to be wound around the entire circumference when the pair of wire barrels 18 and 18 are crimped to the core wire 41, and the length thereof is the wire barrel. 18 is set to about 1/3 of the axial length of the electric wire 40, and as shown in FIG. 4, the front edge of the wide portion 31 is connected to the wire barrel 18 of the terminal body 11A. It overlaps with the mounting part 17 and the wire barrels 18 and 18 so that the edge part by the side of the part 12 may be followed. Further, as shown in FIG. 3, the front side of the wide portion 31 is bent upward at the rear end position in the connection portion 12 of the terminal 11, and then forward at the height position of the ceiling wall 15 of the connection portion 12. It is provided so that it may be folded and overlapped with the ceiling wall 15. The substantially central portion of the region overlaid on the ceiling wall 15 is bent so as to be slightly lifted from the ceiling wall 15, thereby elastically supporting the tab of the male terminal inserted from the front. It is possible to contact.

  As described above, the conductive member 30 is provided so as to be overlapped with a part of the terminal body 11A, but a part thereof may be temporarily fixed to the terminal body 11A. As a temporary fastening method, any method such as brazing, welding, and bonding, for example, forming a claw portion on one side and locking it to the other side locking portion can be adopted.

  Next, an example of the manufacturing method of the electric wire 10 with a terminal of this embodiment is demonstrated.

  First, the tongue piece 20A of the metal plate material constituting the terminal body 11A is bent to form the elastic contact piece 20. Next, after the conductive member 30 bent into a predetermined shape is disposed at a predetermined position of the terminal body 11A, the terminal body 11A is bent into the predetermined shape shown in FIGS. The position of the conducting member 30 at this time is a position where the edge on the front side of the wide portion 31 is exactly along the edge on the connection portion 12 side of the wire barrel 18.

  Further, pinpoint welding may be performed by irradiating a laser so that the conductive member 30 does not move with respect to the terminal main body 11 </ b> A, and temporarily fixed.

  Next, the core wire 41 exposed from the end portion of the electric wire 40 is placed on the placement portion 17 of the terminal 11, and the pair of wire barrels 18 and 18 and the insulation barrels 19 and 19 are crimped. The wide portion 31 of the conducting member 30 is curved and crimped so as to wrap around the core wire 41 (see FIG. 1).

  According to the terminal-equipped electric wire 10 of this embodiment, since the terminal body 11A is made of iron or an iron alloy, the potential difference from the core wire is compared with that of copper or copper alloy that has been conventionally used. Is small and difficult to corrode. Moreover, since the base layer 11 having the anticorrosive action and the tin plating layer 3 are formed on the surface of the terminal main body 11A, it is possible to effectively suppress the progress of corrosion.

  Further, a part of the wire barrel 18 that is a connection portion with the core wire 41 and the connection portion 12 that is a connection portion with the counterpart terminal in the terminal body 11A are made of the same aluminum or aluminum alloy as the core wire 41. Since the conducting member 30 is disposed, corrosion is unlikely to occur between the core wire 41 and the conducting member 30, and the current mainly flows through the conducting member 30 having a small electrical resistance instead of the terminal body 11A. Even when a large amount of current flows, the calorific value is small.

  Further, since the wide portion 31 of the conducting member 30 is arranged so as to be offset toward the connection portion 12 side of the wire barrel 18, the connection portion 12 side in the width direction of the wire barrel 18 (the axial direction of the electric wire) is the opposite. When the wire barrel 18 is crimped to the core wire 41, it is in a highly compressed state (high compression portion 41A) (see FIG. 7). The formed oxide film is firmly broken, and the core wires 41 and the core wire 41 wire barrel 18 are brought into a good conductive state. On the other hand, the side opposite to the connection portion 12 in the width direction of the wire barrel 18 (the axial direction of the electric wire) is thinner than the connection portion 12 side, so that the core wire 41 is in a low compression state (low compression portion 41B). (See FIG. 8). Therefore, the holding force with respect to the core wire 41 of the wire barrel 18 can be increased in this portion.

<Embodiment 2>
Next, the electric wire 50 with a terminal of Embodiment 2 of this invention is demonstrated with reference to FIG. 9 thru | or FIG. In the following description, the description overlapping with the first embodiment is omitted, and the same reference numerals are given.

  As shown in FIGS. 9 and 10, the electric wire with terminal 50 of the present embodiment is obtained by electrically connecting a male terminal 51 and an electric wire 40.

  The terminal 51 is made of a steel plate in which a zinc-nickel underlayer and a plating layer containing tin or a tin alloy are formed on the surface of a metal plate made of iron or an iron alloy. As shown in FIGS. And a tab 52 (an example of a connecting portion) that is connected to an elastic contact piece (an example of a mating terminal) of a female terminal that protrudes forward from the front end of the main body portion 55 and is a mating terminal. ), A placement portion 57 that extends in the axial direction from the rear of the main body portion 55 and on which the electric wire 40 is placed, and is extended so as to rise from both edges of the placement portion 57 and is placed on the placement portion 57. A pair of wire barrels 58 and 58 (an example of a barrel portion) that are caulked and crimped to the core wire 41 of the electric wire 40 and a rear side of the wire barrels 58 and 58 are provided and covered with an insulating coating 42 at the end of the electric wire 40. A pair of A terminal body 51A and a shoe barrel 59, and a conductive member 70..

  The tab 52 has a structure in which both side edge portions of an elongated flat plate-like base 53 extending in the front-rear direction are folded inward, and the folded portions 54 are overlapped so as to be in close contact with the upper surface of the base 53. In addition, a gap of a predetermined width is set between the opposing edges of the pair of folded portions 53, and a tab portion 72 of a conductive member 70 described later is disposed here, so that the entire double portion It is a flat plate shape (see FIG. 13). Further, the folded portion 54A in the vicinity of the front end portion of the tab 52 is set to such a length that the opposite edge portions thereof face each other when folded, and the tab portion of the conductive member 70 is provided on the side surface on the rear side of the folded portion 54A. It arrange | positions so that the front end surface of 72 may contact | abut. Further, the tip end portion of the tab 52 is tapered in the thickness direction and the width direction, and serves as a guide portion 56 that guides insertion into the female terminal.

  The main body 55 is formed with a locking hole 61 that opens to the bottom when the terminal 51 is accommodated in a cavity of a housing (not shown) and a lance provided in the cavity enters and can be locked. In addition, a pair of stabilizers 62 functioning to guide the insertion operation into the cavity and the like are protruded from both side edges of the locking hole 61.

  Furthermore, a plurality of concave portions 57A for breaking the oxide film formed around the core wire 41 are provided on the upper surface of the mounting portion 17 (see FIG. 12).

  Similar to the above embodiment, the conducting member 70 of this embodiment is made of a metal plate made of aluminum or aluminum alloy having a tin plating layer on the surface, and is one end side in the length direction of a long rectangle (in FIG. 12). The right side) is a wide portion 71 set to a width that can be wound around the entire circumference of the core wire 41, and the other end side is a tab portion that can be connected to a female terminal. It has a letter shape. The length of the wide portion 71 in the axial direction is set to about ¼ of the length of the wire barrel 58 in the axial direction of the electric wire 40. As shown in FIG. Is placed on the mounting portion 57 and the wire barrels 58 and 58 so as to be along the edge portion of the wire barrel 58 on the connection portion 52 side. Further, as shown in FIG. 11, the front side of the wide portion 71 is bent upward at the rear end position in the main body portion 55 of the terminal 51, and is further bent forward, so that the tab portion 72 is connected to the tab 52. It is set so as to overlap the base 53.

  According to such a terminal-attached electric wire 50 of the present embodiment, the terminal body 51A is made of iron or an iron alloy, and the wire barrel 58, which is a connection portion with the core wire 41, as in the above-described embodiment. Since the conductive member 70 made of aluminum or aluminum alloy similar to the core wire 41 is disposed on a part and the tab 52 which is a connection portion with the counterpart terminal, it is difficult to corrode and has a large capacity current. The amount of heat generated is small even when

<Embodiment 3>
Next, the electric wire 80 with a terminal of Embodiment 3 of this invention is demonstrated with FIG. In the following description, the description overlapping with the first and second embodiments is omitted, and the same reference numerals are given.

  As shown in FIG. 15, the terminal-attached electric wire 80 of the present embodiment is obtained by electrically connecting a female terminal 81 and the electric wire 40.

  As shown in FIG. 15, the terminal 81 is connected to a male terminal tab on the mating side so as to be conductive, and a mounting on which the electric wire 40 is mounted in an axial direction from the connecting portion 82. A pair of wire barrels 88, 88 extending so as to rise from both edges of the mounting portion 87 and crimped to the core wire 41 of the electric wire 40 mounted on the mounting portion 87, and the wire barrel 88 , 88 and a terminal body 81A having a pair of insulation barrels 89, 89 that are crimped to a portion covered with an insulating coating 42 at the end of the electric wire 40, and a conducting member 90. It is configured. The terminal body 81A is made of a steel plate formed of a zinc-nickel underlayer and a plating layer containing tin or tin alloy on the surface of a metal plate made of iron or iron alloy.

  The connecting portion 82 is formed in a rectangular tube shape, and includes a bottom wall 83 extending in the front-rear direction, a pair of side walls 84 and 84 raised from both side edges of the bottom wall 83, and a bottom wall continuous from one side wall 84. 83, a ceiling wall 85 that faces 83, and an outer wall 86 that continues from the other side wall 84 and overlaps the outside of the ceiling wall 85. Near the front of the bottom wall 83, an elastic piece 83 </ b> A shaped to rise gently toward the front side (left side in FIG. 15) is provided by raising a part of the bottom wall 83. The distal end portion of the elastic piece 83A is bent downward in the shape of a letter, and the bent portion 83B is elastically brought into contact with a conduction member 90 to be described later so that electrical conduction can be ensured. .

  The conducting member 90 of the present embodiment is provided from a part of the placement portion 87 of the terminal main body 81 </ b> A to the connection portion 82. The conductive member 90 is made of a metal plate made of aluminum or aluminum alloy having a tin plating layer on the surface, and one end side (the right side in FIG. 15) of the long rectangle is the wide portion 91. The wide portion 91 has a width that allows the core wire 41 to be wound, and is approximately 1/3 of the axial length of the electric wire 40 of the wire barrel 88. The side edge portion is overlapped with the placement portion 87 and the wire barrels 88 and 88 so as to be along the edge portion of the terminal main body 81A on the connection portion 82 side of the wire barrel 88. In addition, the front side of the wide portion 91 has a length and a shape substantially along the bottom wall 83 and the elastic piece 83A described above, and is superimposed on the elastic piece 83A inside the terminal body 81A. Similarly to the elastic piece 83A described above, the leading end portion of the conducting member 90 is bent in a downward-shaped shape, and elastically with respect to the elastic piece 83A and the tab of the male terminal near the bent portion 92. While being brought into contact with each other for electrical conduction, the distal end side thereof serves as a guide surface 93 when the male terminal is inserted.

  According to the electric wire with terminal 80 of this embodiment, the terminal main body 81A is made of iron or an iron alloy, and the wire barrel 88 that is a connection portion with the core wire 41 is also formed as in the above embodiment. Since the conductive member 90 made of aluminum or aluminum alloy similar to the core wire 41 is disposed on a part and the elastic piece 83A which is a connection portion with the counterpart terminal, it is difficult to corrode and has a large capacity. Even when current flows, the amount of heat generated is small.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) In the above embodiment, the zinc main body 11A, 51A, and 81A are provided with a zinc-nickel underlayer and a tin plating layer. However, only a tin plating layer may be provided, or a structure may not be provided at all. Good. In addition, these base layers and tin plating layers are not provided in the entire region of the terminal bodies 11A, 51A, 81A, but contact portions with different metals in the terminal bodies 11A, 51A, 81A, for example, the mounting portions 17, 57, It is good also as a structure provided only in 87, wire barrel 18,58,88 and connection part 12,82, and tab 52. FIG.

  (2) In the above embodiment, the conducting members 30, 70, 90 are made of aluminum or aluminum alloy, but the ionization tendency is larger than the iron or iron alloy constituting the terminal bodies 11A, 51A, 81A, and the electrical resistance As long as the metal is small. Specific examples include magnesium (alloy).

  (3) In the above embodiment, the tin plating layer is provided on the surface of the conductive members 30, 70, 90. However, it is not always necessary to provide the tin plating layer.

  (4) The shape of the conducting member is not limited to the above embodiment, and is disposed at least between the barrel portions 18, 58, 88 and the core wire 41, and between the connecting portions 12, 82 (tab 52) and the counterpart terminal. Any configuration can be used as long as it is configured. For example, in the above-described embodiment, the conductive members 30, 70, 90 are arranged in a part of the wire barrels 18, 58, 88, but may be arranged in the whole wire barrel.

10, 50, 80 ... Electric wires with terminals 11, 51, 81 ... Terminals 11A, 51A, 81A ... Terminal bodies 12, 82 ... Connection portions 17, 57, 87 ... Placement portions 18, 58, 88 ... Wire barrel (barrel portion) )
19, 59, 89 ... Insulation barrel 20 ... Elastic contact pieces 30, 70, 90 ... Conductive members 31, 71, 91 ... Wide part 40 ... Electric wire 41 ... Core wire 42 ... Insulation coating 41A ... High compression part 41B ... Low compression part 52 ... Tab (connection part)
72 ... Tab part 82A ... Elastic piece

Claims (8)

A terminal having a barrel portion that is crimped to a core wire made of aluminum or aluminum alloy that is exposed from the end of the electric wire and a connection portion that is connected to be electrically connected to the counterpart terminal,
A terminal body made of iron or an iron alloy, at least between the barrel portion and the core wire, and between the connection portion and the mating terminal, has an ionization tendency equal to that of the core wire or from the terminal body. A terminal comprising: a conducting member that is close to the core wire and has an electrical resistance smaller than that of the terminal body and made of a metal material. The terminal according to claim 1, wherein the conducting member is made of aluminum or an aluminum alloy. The terminal according to claim 1, wherein the terminal body is made of carbon steel, weather resistant steel, or stainless steel. The terminal according to any one of claims 1 to 3, wherein a tin plating layer is provided on a surface of the terminal body. The terminal according to claim 4, wherein a base layer made of zinc or a zinc alloy is provided under the tin plating layer. The terminal according to claim 1, wherein a tin plating layer is provided on a surface of the conductive member. An electric wire in which a core wire made of aluminum or an aluminum alloy is covered with an insulation coating, a barrel portion that is crimped to the core wire exposed from the end of the electric wire, and a terminal that has a connection portion that is connected to be electrically connected to a counterpart terminal; An electric wire with a terminal comprising:
The terminal is disposed between a terminal body made of iron or an iron alloy, at least between the barrel portion and the core wire, and between the connection portion and the counterpart terminal, and the ionization tendency is the same as that of the core wire or An electric wire with a terminal, characterized in that it is closer to the core wire than the terminal main body and is composed of a conductive member made of a metal material having an electric resistance smaller than that of the terminal main body. The conducting member is arranged to be offset toward the connecting portion side in the width direction of the barrel portion, and the connecting portion side in the width direction of the barrel portion is in a state where the barrel portion is crimped to the core wire. The electric wire with a terminal according to claim 7, wherein the electric wire has a high compression portion, and the opposite side of the connection portion is a low compression portion with respect to the core wire.

Images