JP2012084417A - Terminal-equipped electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal-equipped electric wire having excellent waterproof performance by preventing the removal of resin from a terminal fitting when resin-molding an electric wire connection between an electric wire terminal and the terminal fitting.SOLUTION: A terminal-equipped electric wire 10 is configured such that a terminal fitting 14 is connected to an electric wire terminal of a coated electric wire 12 having a conductor exposed part 18a. A molded part 16 molded with resin is formed so as to cover an outer periphery of an electric wire connection 22 and the conductor exposed part 18a, in a range extending from a position over a pair of sidewall parts 46a and 46b, which are formed to erect from respective ends of a bottom 44 of a coupling part 26 for coupling the electric wire connection 22 of the terminal fitting 14 and a terminal contact part 24, to a position over an insulation coating 20a of the coated electric wire 12 which is arranged adjacent to and in the rear of the electric wire connection 22. On the molded part 16, a recess 50 recessed from the surface toward the bottom 44 is formed at a portion sandwiched by the pair of sidewall parts 46a and 46b.

Description

  The present invention relates to an electric wire with a terminal, and more particularly to an electric wire with a terminal that is suitably used for a vehicle such as an automobile and has excellent waterproof performance.

  In general, a terminal-attached electric wire is manufactured by connecting a terminal fitting to a conductor exposed by peeling off an insulating coating of a covered electric wire at a terminal. Some terminal fittings are provided with a pair of crimping pieces that are crimped to the exposed conductor. The outer periphery of the exposed conductor is covered with a pair of crimping pieces, and the conductor and terminal fitting are crimped by covering them. Is connected.

  In this case, the conductor on the tip side than the portion where the conductor is crimped, and the conductor between the portion where the conductor is crimped and the insulation coating are not covered with the crimping piece, so the conductor and the terminal fitting The contact portion is exposed. When water enters this contact portion, corrosion tends to occur.

  In recent years, an aluminum material is sometimes used as a conductor for the purpose of reducing the weight of a vehicle such as an automobile. Generally, since a copper material is used for the terminal fitting, in this case, the conductor and the terminal fitting are made of different metals. When water enters a contact portion made of a dissimilar metal, a local battery is formed, and electrolytic corrosion is likely to occur. That is, when the contact portion is made of a different metal in this way, corrosion is particularly likely to occur.

  In order to prevent the occurrence of corrosion at the contact portion between the conductor and the terminal fitting, waterproofing is performed by molding the outer periphery of the contact portion between the conductor and the terminal fitting with resin. For example, in Patent Document 1, in a grounding wire, a mold is attached so as to surround a bare wire conductor, and urethane resin is foamed in the mold to form a rectangular parallelepiped mold portion on the outer circumference of the bare wire conductor. It is shown.

JP 2007-052999 A

  The conventional mold part shown by patent document 1 is formed so that the bare wire conductor of the earth | ground electric wire connected to the flat wire connection part of a ground terminal and this flat wire connection part may be covered. Yes, it is a rectangular parallelepiped.

  Here, as shown in FIG. 1, for example, as shown in FIG. 1, the terminal fitting connected to the electric wire terminal of the covered electric wire includes the electric wire connecting portion 22 connected to the electric wire terminal and the terminal contact portion 24 contacted with the mating terminal fitting. And a pair of side wall portions 46 a and 46 b erected from the bottom portion 44 at both ends of the connecting portion 26. When a conventional rectangular parallelepiped mold part as shown in Patent Document 1 is applied to a terminal-attached electric wire using the terminal fitting 14 having such a configuration, the range of the chain double-dashed line in FIG. Is called.

  The rectangular parallelepiped mold portion 80 is applied to the side wall portions 46a and 46b of the connecting portion 26 of the terminal fitting 14, and the cross section (DD cross section) of the mold portion 80 at the side wall portions 46a and 46b is as shown in FIG. It is. As shown in FIG. 11, the cross section of the connecting portion 26 is formed in a U shape by a bottom portion 44 and a pair of side wall portions 46 a and 46 b that are formed upright from the bottom portion 44. The resin is also filled inside the U-shaped depression.

  For this reason, the resin is peeled from the side wall portions 46a and 46b inside the side wall portions 46a and 46b due to the shrinkage of the resin immediately after molding, and a gap is generated between the terminal fitting 14 and the resin of the mold portion 80. There is a risk. Thereby, there exists a possibility that water may approach into the contact part of the conductor 18 of the covered electric wire 12, and the terminal metal fitting 14 via this clearance gap, and there exists a possibility that sufficient waterproof performance cannot be exhibited.

  The problem to be solved by the present invention is to provide a terminal-attached electric wire having excellent waterproof performance by suppressing the peeling of the resin from the terminal fitting when the electric wire connecting portion between the electric wire terminal and the terminal fitting is molded with resin. is there.

  In order to solve the above problems, a terminal-attached electric wire according to the present invention is a terminal-attached electric wire in which a terminal fitting is connected to the electric wire end of a covered electric wire having a conductor exposed portion at the electric wire end, and the terminal fitting includes the electric wire. A wire connecting portion connected to a terminal; a terminal contact portion that is in contact with a mating terminal fitting; and a connecting portion that connects the wire connecting portion and the terminal contact portion, wherein the connecting portion is a bottom, A pair of side walls formed upright from both ends of the bottom in a direction perpendicular to the axial direction of the terminal fitting, and more than the tip of the conductor exposed portion of the wire terminal connected to the wire connecting portion Range from the position on the side wall portion of the connecting portion on the front end side and the rear end side with respect to the terminal contact portion to the insulating coating of the covered electric wire adjacent to the wire connection portion on the rear end side with respect to the wire connection portion Then, the wire connection part And a mold part molded with resin so as to cover the outer periphery of the exposed conductor part, and the mold part is recessed from the surface toward the bottom part in a portion sandwiched between the pair of side wall parts. And a slit extending from the surface toward the bottom is formed.

  At this time, the resin of the mold part is preferably a thermoplastic resin. The thermoplastic resin is preferably a polyamide resin.

  According to the terminal-attached electric wire according to the present invention, from the positions of the pair of side walls formed upright from the both ends of the bottom of the connecting portion that connects the electric wire connecting portion and the terminal contact portion, the rear end side of the electric wire connecting portion. In the range up to the insulation coating of the covered electric wire adjacent to the electric wire connecting part, a mold part molded with resin is formed so as to cover the outer periphery of the electric wire connecting part and the conductor exposed part, and a pair of side wall parts in this molded part Since a recess that is concave from the surface toward the bottom or a slit that extends from the surface toward the bottom is formed in the portion sandwiched between the two, cooling immediately after molding is performed in the portion sandwiched between the pair of side walls. The stress applied to the resin in contact with the inside of the side wall due to the shrinkage of the resin at the time can be relaxed. Thereby, it can suppress that resin peels from a side wall part by shrinkage | contraction of the resin at the time of cooling immediately after shaping | molding inside a side wall part.

It is a top view of the electric wire with a terminal of the state before forming a mold part. It is a perspective view of a terminal metal fitting. It is a top view of the electric wire with a terminal concerning a first embodiment of the present invention. It is a side view of the electric wire with a terminal concerning a first embodiment of the present invention. Fig.5 (a) is sectional drawing showing the AA cross section of the electric wire with a terminal shown in FIG. 3, FIG.5 (b) is a partially expanded view of Fig.5 (a). It is sectional drawing showing the BB cross section of the electric wire with a terminal shown in FIG. It is sectional drawing in the connection part of the electric wire with a terminal concerning other embodiments. It is a top view of the electric wire with a terminal concerning a second embodiment of the present invention. It is sectional drawing showing CC cross section of the electric wire with a terminal shown in FIG. It is a top view which shows the state which applied the mold part of the conventional rectangular parallelepiped to the electric wire with a terminal shown in FIG. Fig.11 (a) is sectional drawing showing the DD cross section of the electric wire with a terminal shown in FIG. 10, FIG.11 (b) is a partially expanded view of Fig.11 (a).

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

  FIG. 1 is a plan view of a terminal-attached electric wire in a state before forming a mold part. FIG. 2 is a perspective view of the terminal fitting. FIG. 3 is a plan view of the electric wire with terminal according to the first embodiment of the present invention. FIG. 4 is a side view of the electric wire with terminal according to the first embodiment of the present invention. Fig.5 (a) is sectional drawing showing the AA cross section of the electric wire with a terminal shown in FIG. 3, FIG.5 (b) is a partially expanded view of Fig.5 (a). FIG. 6 is a cross-sectional view illustrating a B-B cross section of the terminal-attached electric wire illustrated in FIG. 3.

  The electric wire with terminal 10 according to the first embodiment of the present invention includes a covered electric wire 12, a terminal fitting 14, and a mold part 16.

  The covered electric wire 12 includes a conductor 18 and an insulating coating 20 that covers the outer periphery of the conductor 18 and insulates the conductor 18. The conductor 18 may be composed of a plurality of metal strands such as a stranded wire formed by twisting a plurality of metal strands, or may be a single core metal wire. Examples of the material of the conductor 18 include aluminum, copper, and alloys thereof. The conductor 18 made of these metals may be further plated with a metal such as tin or nickel. The insulating coating 20 is made of an insulating polymer material. Examples of the polymer material include polyolefin and vinyl chloride resin. Various additives such as colorants such as fillers, flame retardants, and pigments may be added to these polymer materials as necessary.

  The insulated wire 12 has the insulating coating 20 peeled off at the end of the wire, and has a conductor exposed portion 18a at the end of the wire. The conductor exposed portion 18 a is a portion that is in contact with the terminal fitting 14 in the covered electric wire 12, and is a portion that attempts electrical connection with the terminal fitting 14.

  The terminal metal fitting 14 is connected to the electric wire terminal and becomes an electric connection portion with the conductor exposed portion 18a of the covered electric wire 12 and the electric connection between the mating terminal metal fitting and the electric terminal connection metal fitting 22 The terminal contact part 24 used as the part which aims at connection, and the connection part 26 which connects the electric wire connection part 22 and the terminal contact part 24 are provided.

  The wire connecting portion 22 includes a conductor crimping portion 28 for crimping the conductor exposed portion 18a of the wire end of the covered wire 12, and a sheath crimping portion 30 for crimping the insulating coating 20a adjacent to the conductor exposed portion 18a. The conductor crimping portion 28 is disposed at a position close to the connecting portion 26, and the covering crimping portion 30 is disposed at a position adjacent to the conductor crimping portion 28 on the opposite side of the connecting portion 26 across the conductor crimping portion 28. Yes. The conductor crimping portion 28 and the covering crimping portion 30 have a common bottom portion 32 that is continuously integrated. The conductor crimping portion 28 includes a pair of conductor crimping pieces 34a and 34b erected from both ends of the bottom portion 32 in the direction orthogonal to the axial direction, and the covering crimping portion 30 is the bottom portion 32 in the direction orthogonal to the axial direction. Are provided with a pair of coated crimping pieces 36a, 36b.

  The terminal contact portion 24 is formed in a rectangular tube shape penetrating along the axial direction of the terminal fitting 14. Inside the cylindrical terminal contact portion 24, a contact piece 38 that comes into contact with the mating terminal fitting is provided. The contact piece 38 is formed by bending a plate material extending in the axial direction from the bottom portion 40 of the terminal contact portion 24 on the distal end side of the terminal contact portion 24 and folding it back to the bottom portion 40, and bending the distal end portion of the folded portion to the bottom portion 40. Further, it is configured so that the folded back tip portion is further in contact with the bottom portion 40 of the terminal contact portion 24. The contact piece 38 has an elliptical shape as a whole, and is configured to be elastically deformable by having a curved portion.

  The ceiling portion 42 facing the bottom portion 40 of the terminal contact portion 24 is formed by overlapping two top plates 42a and 42b. The inner top plate 42 b has a convex portion 421 that protrudes toward the bottom portion 40. The convex portion 421 of the inner top plate 42b and the contact piece 38 cooperate to elastically clamp the mating terminal fitting inserted between them with a predetermined contact pressure. Thereby, the fitting force between the mating terminal fitting and the terminal fitting 14 is increased.

  The connecting portion 26 is continuous from the bottom portion 32 of the wire connecting portion 22 and the bottom portion 40 of the terminal contact portion 24 and from both ends of the bottom portion 44 in the direction orthogonal to the axial direction of the terminal fitting 14. And a pair of side wall portions 46a and 46b formed upright. The side wall portions 46a and 46b of the connecting portion 26 are continuously integrated with the side wall portions 48a and 48b of the terminal contact portion 24 and the base portions 341a and 341b of the conductor crimping pieces 34a and 34b of the conductor crimping portion 28 of the wire connecting portion 22. ing. The side wall portions 46 a and 46 b of the connecting portion 26 are ribs for the bottom portion 44 of the connecting portion 26 and have a function of increasing the bending strength of the connecting portion 26.

  The conductor exposed portion 18a at the wire end of the covered wire 12 is disposed between the pair of conductor crimping pieces 34a and 34b of the wire connecting portion 22 of the terminal fitting 14, and the insulating coating 20a adjacent to the conductor exposed portion 18a is formed as a pair of conductors. It arrange | positions between a pair of coating | coated crimping | compression-bonding pieces 36a and 36b adjacent to the crimping | compression-bonding pieces 34a and 34b. The conductor exposed portion 18a is covered so as to be wrapped by the common bottom portion 32 of the electric wire connecting portion 22 and the pair of conductor crimping pieces 34a and 34b, and is crimped to the conductor crimping portion 28 by crimping the conductor crimping portion 28 in this state. The Further, the insulating coating 20a adjacent to the conductor exposed portion 18a is covered so as to be wrapped by the common bottom portion 32 of the electric wire connecting portion 22 and the pair of coated crimping pieces 36a and 36b, and the coated crimping portion 30 is crimped in this state. Is crimped to the covering crimping portion 30.

  The mold part 16 is formed of resin. An example of the resin is a thermoplastic resin. Examples of the thermoplastic resin include polyamide resin and olefin resin.

  The mold part 16 is located from the position on the side wall parts 46a and 46b of the connecting part 26 on the front end side of the conductor exposed part 18a of the electric wire terminal connected to the electric wire connection part 22 and on the rear end side of the terminal contact part 24. The resin is molded so as to cover the outer periphery of the wire connection portion 22 and the conductor exposed portion 18a in the range from the wire connection portion 22 to the insulating coating 20a of the covered wire 12 adjacent to the wire connection portion 22 on the rear end side. Is formed.

  In the mold portion 16, a concave portion 50 is formed in a portion sandwiched between the pair of side wall portions 46 a and 46 b so as to be concave from the surface toward the bottom portion 44 of the connecting portion 26. More specifically, the recessed part 50 is formed along the recessed shape of the connection part 26 connected from one side wall part 46a via the bottom part 44 to the other side wall part 46b. The thickness of the resin that covers the inside of the side wall portions 46a and 46b is set to the same thickness as the thickness of the resin that covers the outside of the side wall portions 46a and 46b. Further, the thickness of the resin covering the inside of the bottom portion 44 is set to the same thickness as the thickness of the resin covering the outside of the bottom portion 44. The thickness of the resin that covers the outside of the side wall portions 46 a and 46 b is set to the same thickness as the thickness of the resin that covers the outside of the bottom portion 44. The inside of the side walls 46a and 46b and the inside of the bottom 44 refer to the inside surrounded by the pair of side walls 46a and 46b and the bottom 44, and the outside of the side walls 46a and 46b and the outside of the bottom 44 are The opposite sides of the inner side with the side wall portions 46a and 46b and the bottom portion 44 interposed therebetween are referred to.

  As a result, the resin covering the inside of one side wall 46a and the resin covering the inside of the other side wall 46b are connected on an arbitrary straight line L that connects the one side wall 46a and the other side wall 46b. There are no parts.

  Therefore, in the terminal-attached electric wire 10 of the first embodiment, as shown in FIG. 5B, the resin covering the inner side of the one side wall portion 46a contacts the one side wall portion 46a around the central position P. The contact interface 461 and the inner surface 462 of the one side wall 46a can shrink. That is, the shrinkage stress of the resin covering the inside of the one side wall portion 46a is distributed to both the contact interface 461 that is in contact with the one side wall portion 46a and the inner surface 462 of the one side wall portion 46a. Therefore, the shrinkage stress applied to the resin covering the inside of the one side wall portion 46a at the contact interface 461 that is in contact with the one side wall portion 46a is relieved, and the resin is difficult to peel off at the contact interface 461.

  At this time, the resin is in close contact with the one side wall 46a at the contact interface 461 that is in contact with the one side wall 46a, whereas the resin is in the other surface on the inner surface 462 of the one side wall 46a. It is not in close contact with the member. Therefore, the shrinkage stress of the resin covering the inner side of the one side wall part 46a is relatively easily applied to the inner surface 462 of the one side wall part 46a. Also by this, the shrinkage stress applied to the resin covering the inside of the one side wall portion 46a at the contact interface 461 in contact with the one side wall portion 46a is relieved, and the resin is more difficult to peel off at this contact interface 461.

  Moreover, in the electric wire 10 with a terminal of 1st embodiment, in the part pinched | interposed into a pair of side wall parts 46a and 46b, on the arbitrary straight line L which ties one side wall part 46a and the other side wall part 46b, Due to the formation of the recess 50, there is a portion where no resin exists. That is, in this portion, the thickness of the resin covering the inner side of the one side wall portion 46a is thin. By reducing the thickness of the resin that covers the inside of one side wall 46a, the shrinkage of the resin is reduced, and the resin that covers the inside of one side wall 46a at the contact interface 461 that is in contact with one side wall 46a. The applied shrinkage stress is reduced. As a result, the resin becomes more difficult to peel off at the contact interface 461.

  10 and 11, when the rectangular parallelepiped mold part 80 is formed in the same range as shown in FIGS. 10 and 11, the entire portion sandwiched between the pair of side wall parts 46a and 46b is resin. Therefore, the shrinkage stress applied to the resin that covers the inner side of the one side wall portion 46a is easily concentrated on the contact interface 463 that is in contact with the one side wall portion 46a. Therefore, the resin is easily peeled off at the contact interface 463.

  Therefore, according to the terminal-attached electric wire 10 of the first embodiment, the stress applied to the resin in contact with the inner side of the side wall portions 46a and 46b due to the shrinkage of the resin at the time of cooling immediately after molding can be relaxed. Thereby, it can suppress that resin peels from side wall part 46a, 46b by shrinkage | contraction of the resin at the time of the cooling immediately after shaping | molding inside side wall part 46a, 46b.

  Since the mold part 16 needs to be formed so as to completely cover the conductor exposed part 18 a of the covered electric wire 12, it is necessary to mold so that the tip of the conductor exposed part 18 a does not come out of the mold part 16. At this time, as shown in FIG. 6, the distance a from the most distal position S of the exposed conductor portion 18a to the position T where the bottom portion 44 of the connecting portion 26 is exposed is 0.8 mm or more (a ≧ 0.8 mm). Thus, it is preferable that the mold part 16 is formed. Thereby, even if the terminal metal fitting 14 is creeped toward the conductor exposed portion 18a along the contact interface 441 with the resin at the bottom portion 44 of the connecting portion 26, it is possible to suppress the corrosion from proceeding to the conductor exposed portion 18a. Therefore, corrosion of the contact portion between the conductor exposed portion 18a and the terminal fitting 14 can be prevented.

  Covering with resin from the most advanced position S of the exposed conductor portion 18a to the position T at which the bottom portion 44 of the connecting portion 26 is exposed is mainly for preventing the progress of creeping corrosion. The thickness does not need to be from the bottom 44 of the connecting portion 26 to a position exceeding the height of the crimped conductor crimping piece 34a, and a thickness of about 0.1 mm is sufficient. For the portion above this portion of the mold portion 16, it is sufficient if the distance b from the most distal position S of the exposed conductor portion 18a is 0.1 mm or more (b ≧ 0.1 mm).

  Moreover, the taper part 52 which inclines so that thickness may increase toward the front end side from this edge part to the edge part by the side of the insulation coating 20 of the insulated wire 12 in the mold part 16 of the electric wire 10 with a terminal of 1st embodiment. Since the thickness of the resin at this end is reduced, the mold part 16 is difficult to peel off at this end.

  The mold part 16 can be formed as follows, for example. That is, the mold part 16 can be formed by injecting a resin into the mold after the mold is attached so as to surround a specific range for forming the mold part 16. As the mold, it is preferable to use a mold having a rectangular parallelepiped convex portion at an inner surface position corresponding to the concave portion 50 of the mold portion 16.

  In the terminal-attached electric wire 10 of the first embodiment, a concave portion 50 having a square cross section is formed along the concave shape of the connecting portion 26. As the shape of the concave portion, for example, as shown in FIG. The concave portion 54 may be a curved portion such as a semicircle. In order to form the mold part 16 having such a shape, it is preferable to use a mold provided with a semi-cylindrical convex part at an inner surface position corresponding to the concave part 54 of the mold part 16.

  Next, the electric wire with a terminal concerning a second embodiment is explained. FIG. 8 is a plan view of the electric wire with terminal according to the second embodiment of the present invention. FIG. 9 is a cross-sectional view illustrating a CC cross section of the terminal-attached electric wire illustrated in FIG. 8.

  As shown in FIG. 8, the terminal-attached electric wire 60 according to the second embodiment of the present invention has, as the basic configuration, the covered electric wire 12, the terminal fitting 14, and the terminal-attached electric wire 10 according to the first embodiment. And a mold part 62.

  The electric wire with terminal 60 according to the second embodiment is different from the electric wire with terminal 10 according to the first embodiment in that the shape of the molded portion 62 is different. About a structure other than this, it is the same as that of the electric wire 10 with a terminal which concerns on 1st embodiment. Description of the configuration common to the terminal-attached electric wire 10 according to the first embodiment is omitted.

  In the mold part 62 of the electric wire 60 with a terminal according to the second embodiment, a slit 64 extending from the surface toward the bottom part 44 is formed in a portion sandwiched between the pair of side wall parts 46a, 46b of the connecting part 26. .

  As a result, the resin covering the inside of one side wall 46a and the resin covering the inside of the other side wall 46b are connected on an arbitrary straight line L that connects the one side wall 46a and the other side wall 46b. There are no parts.

  Therefore, also about the electric wire 60 with a terminal of 2nd embodiment similarly to the electric wire 10 with a terminal of 1st embodiment, the shrinkage stress of resin which covers the inner side of one side wall part 46a is contacting one side wall part 46a. Since the contact interface 464 and the inner surface 465 of the one side wall portion 46a are dispersed, the shrinkage applied to the resin covering the inner side of the one side wall portion 46a at the contact interface 464 in contact with the one side wall portion 46a. The stress is relaxed, and the resin becomes difficult to peel off at the contact interface 464.

  Further, at the contact interface 464 that is in contact with the one side wall 46a, the resin is in close contact with the one side wall 46a, whereas at the inner surface 465 of the one side wall 46a, the resin is another member. It is not in close contact. Therefore, the shrinkage stress of the resin covering the inside of the one side wall portion 46a is relatively easily applied to the inner surface 465 of the one side wall portion 46a. Also by this, the shrinkage stress applied to the resin covering the inside of the one side wall portion 46a at the contact interface 464 in contact with the one side wall portion 46a is relieved, and the resin is more difficult to peel off at this contact interface 464.

  The depth of the slit 64 is preferably set in a range in which the distance to the bottom 44 of the connecting portion 26 is at least 0.1 mm, as in the case of the electric wire with terminal 10 of the first embodiment.

  The mold part 62 can be formed as follows, for example. That is, the mold part 62 can be formed by injecting a resin into the mold after the mold is attached so as to surround a specific range for forming the mold part 62. As the mold, it is preferable to use a mold having a plate-like convex portion at an inner surface position corresponding to the slit 64 of the mold portion 62. In addition, a mold that does not have the plate-like convex portion described above is used, and the mold portion 62 is placed at a predetermined position by a plate-like member while the resin immediately before the resin starts shrinking immediately after molding. A slit 64 may be inserted.

  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.

DESCRIPTION OF SYMBOLS 10 Electric wire with a terminal 12 Covered electric wire 14 Terminal metal fitting 16 Mold part 18a Conductor exposure part 20a Insulation coating 22 Electric wire connection part 24 Terminal contact part 26 Connection part 44 Bottom part 46a of a connection part, 46b Side wall part 50 of a connection part 50 Concave part of a mold part

Claims (3)

A terminal-attached wire in which a terminal fitting is connected to the wire end of the covered wire having a conductor exposed portion at the wire end,
The terminal fitting includes an electric wire connecting portion connected to the electric wire terminal, a terminal contact portion to be contacted with a mating terminal fitting, and a connecting portion for connecting the electric wire connecting portion and the terminal contacting portion,
The connecting portion includes a bottom portion and a pair of side wall portions formed upright from both ends of the bottom portion in a direction orthogonal to the axial direction of the terminal fitting,
From the position on the side wall portion of the connecting portion on the front end side of the conductor exposed portion of the wire terminal connected to the wire connection portion and on the rear end side of the terminal contact portion, the rear of the wire connection portion. In the range up to the insulation coating of the covered electric wire adjacent to the electric wire connection part on the end side, a molded part molded with a resin is formed so as to cover the outer periphery of the electric wire connection part and the conductor exposed part,
In the mold part, a concave part that is concave from the surface toward the bottom part or a slit that extends from the surface toward the bottom part is formed in a part sandwiched between the pair of side wall parts. Wire with terminal to be used.   The electric wire with a terminal according to claim 1, wherein the resin of the mold part is a thermoplastic resin.   The electric wire with a terminal according to claim 2, wherein the thermoplastic resin is a polyamide resin.

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