JP2015095313A - Insulated wire and method of producing insulated wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of reducing the number of parts in connection parts of an insulated wire.SOLUTION: An insulated wire 1 includes a core wire 11 and an insulation coating 12 which covers the outer periphery of the core wire 11 while exposing end parts 111 of the core wire 11. The tip part 111a of the end part 111 comes in direct contact with the counter-side terminal to be connected with so as to form a shape F of a terminal connection part connectable to the counter-side terminal.

Description

  The present invention relates to an insulated wire and a method for producing an insulated wire.

  In a wire harness mounted on a vehicle such as an automobile, for example, as illustrated in FIG. 6, a terminal 8 is attached to an end of an insulated wire 80 to form a terminal-attached wire 800. As illustrated in FIG. 6, the terminal 8 attached to the end portion of the insulated wire 80 is a portion connected to the counterpart terminal by directly engaging with the counterpart terminal, and is a terminal connection that is connected to the counterpart terminal. Part 81 is provided. FIG. 6 illustrates a pin-like (so-called male terminal-shaped) terminal connection portion 81 inserted into a mating terminal (so-called female terminal) having a connection portion having a substantially cylindrical shape. The terminal connection portion 81 is connected to the core wire barrel portion 83 via the connection portion 82, and the core wire barrel portion 83 is connected to the covering barrel portion 85 via the connection portion 84. The core wire barrel portion 83 is compressed and deformed so as to hold the exposed core wire portion 801 in the insulated electric wire 80, thereby being crimped and connected to the exposed core wire portion 801. Further, the covering barrel portion 85 is compression-deformed so as to hold the insulating coating 802 of the insulated wire 80, thereby being crimped to the insulating coating 802.

  The terminal 8 attached to the end of the terminal-attached electric wire 800 is inserted into a terminal accommodating chamber (so-called cavity) 90 of the connector 9 as illustrated in FIG. And the connector 9 which accommodated the terminal 8 is fitted with an electrical equipment or the connector etc. which accommodated the other party's terminal. Then, the terminal connection part 81 accommodated in the connector 9 fits into the counterpart terminal to be connected, and is electrically connected to the counterpart terminal (see, for example, Patent Document 1). .

JP 2013-168335 A

  By the way, in the wire harness etc. which are mounted in vehicles, such as a motor vehicle, weight reduction and cost reduction are always requested | required, and reduction of a number of parts is effective for that purpose. As described above, in the conventional mode, at least a terminal and a connector are required for the connection portion of the insulated wire, and it has been difficult to reduce the number of parts at this location.

  This invention is made | formed in view of said subject, and it aims at providing the technique which can reduce the number of parts in the connection part of an insulated wire.

  A 1st aspect is an insulated wire, Comprising: A core wire and the insulation coating which coat | covers the outer periphery of the said core wire, exposing the edge part of the said core wire, The front-end | tip part of the said edge part is a connection object Is formed into a terminal connection portion shape that can be directly contacted with the counterpart terminal and connected to the counterpart terminal.

  A 2nd aspect is an insulated wire which concerns on a 1st aspect, Comprising: The said core wire is formed with the several strand, The said multiple strand is welded in the said front-end | tip part.

  A third aspect is an insulated wire according to the first or second aspect, wherein the end of the insulating coating is disposed outside the cavity in a state where the tip portion is normally inserted into the cavity of the connector. .

  A fourth aspect is an insulated wire according to any one of the first to third aspects, wherein a part of the end portion is caught by a retaining portion for retaining the stopper formed in the cavity of the connector. It is molded into a locked shape that can be used.

  A fifth aspect is a method of manufacturing an insulated wire, in which a) a step of forming an insulating coating that covers an outer periphery of the core wire while exposing an end portion of the core wire, and b) a tip of the end portion. Forming a portion into a terminal connection portion shape that can be directly contacted with a counterpart terminal to be connected and connected to the counterpart terminal.

  A 6th aspect is a manufacturing method of the insulated wire which concerns on a 5th aspect, Comprising: The said core wire is formed with the several strand, The said front-end | tip part is said terminal connection part in the said b) process The plurality of strands at the tip portion are welded while forming into a shape.

  A seventh aspect is a method for manufacturing an insulated wire according to the sixth aspect, wherein in the step b), the tip portion is sandwiched between a pair of molds while being shaped into the terminal connection portion shape. The plurality of strands sandwiched between the pair of molds are welded by passing an electric current between the pair of molds.

  An eighth aspect is a method of manufacturing an insulated wire according to any one of the fifth to seventh aspects, wherein in the step a), the inside of the cavity is inserted in a state in which the tip portion is normally inserted into a connector cavity. The entire portion of the core wire that is to be arranged is exposed from the insulating coating.

  A ninth aspect is a method for manufacturing an insulated wire according to any one of the fifth to eighth aspects, and c) a retaining portion for retaining the stopper formed in the cavity at the end portion. Forming a shape portion that can be hooked with each other.

  According to the 1st, 5th aspect, the front-end | tip part of a core wire is shape | molded by the terminal-connection part shape which can be directly contacted with the other party terminal and can be connected to the said other party terminal. According to this configuration, it is possible to establish an electrical connection with the counterpart terminal without connecting a terminal to the end of the insulated wire. That is, no terminal is required. Therefore, the number of parts in the connection part of an insulated wire can be reduced.

  According to the 2nd, 6th aspect, the several strand is welded in the front-end | tip part of a core wire. According to this configuration, the strength of the tip portion is increased and the molded shape is sufficiently maintained.

  According to the third and eighth aspects, the end of the insulating coating is disposed outside the cavity in a state where the tip end portion of the core wire is normally inserted into the cavity of the connector. According to this configuration, a situation in which the insulating coating is caught at the entrance of the cavity does not occur. Therefore, even when the insulated wire is changed to a thick one, the insulated wire can be satisfactorily attached to the connector cavity without changing the connector.

  According to the fourth and ninth aspects, a part of the end portion of the core wire is formed into a locked shape that can be hooked with a locking portion for retaining the stopper formed in the cavity. According to this structure, it is prevented that the front-end | tip part of the core wire inserted in the cavity slips out of the cavity.

  According to the seventh aspect, the tip portion of the core wire is sandwiched between a pair of molds and molded into a terminal connection portion shape, and a plurality of strands are welded by passing a current between the pair of molds. To do. According to this configuration, the tip portion can be easily and quickly formed into a terminal connection portion shape, and the strength of the tip portion can be increased.

It is a schematic side view near the edge part of an insulated wire. It is a figure for demonstrating the manufacturing process of an insulated wire. It is a schematic perspective view which shows an insulated wire and a connector. It is a schematic sectional drawing which shows the state in which the front-end | tip part of an exposed core part is normally inserted in the cavity. It is a schematic side view near the edge part of the insulated wire which concerns on a modification. It is a figure for demonstrating the conventional electric wire with a terminal.

  Hereinafter, embodiments will be described with reference to the drawings. The following embodiment is an example embodying the present invention, and is not an example of limiting the technical scope of the present invention. In the drawings, the size and number of each part may be exaggerated or simplified for easy understanding.

<1. Insulated wire 1>
The insulated wire 1 will be described with reference to FIG. FIG. 1 is a schematic side view showing an insulated wire 1.

  The insulated wire 1 includes a core wire 11 and an insulating coating 12.

  The core wire 11 is formed by, for example, a plurality of strands. Specifically, the strand is formed of a metal wire such as aluminum, an aluminum alloy, copper, or a copper alloy. For example, the core wire 11 may be a so-called twisted wire in which a plurality of strands formed of metal wires are twisted together.

  The insulating coating 12 is formed of an insulating material and covers the outer periphery of the core wire 11 while exposing the end portion of the core wire 11. The insulating coating 12 serves to insulate the core wire 11 from surrounding members and protect the core wire 11.

  Hereinafter, the end portion of the core wire 11 (that is, the exposed portion of the core wire 11 extending from the end of the insulating coating 12) is also referred to as an “exposed core wire portion 111”. Further, the tip portion of the exposed core part 111 (that is, the end part of the exposed core part 111 opposite to the end of the insulating coating 12 across the root portion extending from the end of the insulating coating 12) Also referred to as “part 111a”.

  The tip end portion 111a of the exposed core part 111 is formed into a shape (hereinafter also referred to as “terminal connection part shape F”) that can be directly contacted with a counterpart terminal to be connected and connected to the counterpart terminal. That is, the tip portion 111a is formed in the same shape as the terminal connection portion 81 of the terminal 8 connected to the end portion of the insulated wire 80 in the conventional electric wire with terminal 800 (see FIG. 6). In the illustrated example, the tip portion 111a is formed into a pin-like terminal connection portion shape F, but the tip portion 111a may be formed into a tab-like terminal connection portion shape F. The tip end portion 111a formed into a pin-shaped or tab-shaped terminal connection portion shape F is inserted into a cylinder of a mating terminal (so-called female terminal) having a substantially cylindrical terminal connection portion. To fit with the female terminal. Moreover, the front-end | tip part 111a may be shape | molded by the substantially cylindrical terminal connection part shape F. FIG. The distal end portion 111a formed into a substantially cylindrical terminal connection portion shape F has a counterpart terminal (a so-called male terminal) having a pin-shaped or tab-shaped terminal connection portion inserted into the cylindrical portion. To fit with the male terminal. Moreover, the front-end | tip part 111a may be shape | molded by the cyclic | annular terminal connection part shape F which can be connected to the other party member with a screw | thread etc. FIG.

  A predetermined portion of the exposed core portion 111 (specifically, a retaining member formed in the cavity 90 in a state where the tip portion 111a is normally inserted into the cavity 90 of the connector 9 (described later)). The stop portion (so-called lance) 901 (see FIG. 4) corresponds to a shape that can be hooked with the lance 901 (hereinafter referred to as “locked shape”). D ”). In the illustrated example, the lance corresponding portion 111b is formed in a concave locked shape D that can be hooked with the convex lance 901, but the lance corresponding portion 111b is locked in a shape D other than the concave shape. May be formed. For example, the lance-corresponding portion 111b may be formed into a convex locked shape D that can be hooked with a concave lance.

  In addition, the exposed core wire portion 111 is integrated, for example, by welding a plurality of strands forming the core wire 11 over the whole. Thereby, the strength of the exposed core portion 111 is increased, and the molded shape is sufficiently maintained. In addition, the conductivity of the exposed core part 111 is increased. However, the range in which the plurality of strands are welded does not necessarily have to be the entire exposed core portion 111, and may be a range including at least the tip portion 111a. For example, it is good also as a structure by which a some strand is welded only in the front-end | tip part 111a of the exposed core part 111. FIG. Further, for example, a plurality of strands may be welded only at the tip portion 111a and the lance corresponding portion 111b.

  In addition, the length of the exposed core portion 111 is the portion of the core wire 11 that is to be disposed in the cavity 90 in a state where the tip end portion 111a is normally inserted into the cavity 90 of the connector 9 (described later). Is the same as or slightly longer than the overall length L (see FIG. 4).

<2. Manufacturing method of insulated wire 1>
Next, a method for manufacturing the insulated wire 1 will be described with reference to FIG. FIG. 2 is a diagram for explaining a manufacturing process of the insulated wire 1.

  First, an insulating coating with a uniform film thickness is formed around the core wire 11 by covering the outer periphery of the core wire 11 by extrusion coating with a resin material (step S1).

  Subsequently, the end portion of the insulating coating formed in step S1 is peeled off to expose the end portion of the core wire 11 (step S2). Thereby, the exposed core part 111 is formed. However, here, the entire portion of the core wire 11 to be disposed in the cavity 90 in a state where the distal end portion 111a of the exposed core portion 111 is normally inserted into the cavity 90 of the connector 9 (described later) At least exposed from the insulating coating. Therefore, the length of the obtained exposed core portion 111 is the same as or slightly longer than the length L (see FIG. 4) of the core wire to be disposed in the cavity 90 in the normal insertion state. It will be a thing.

  By performing the steps S1 to S2, the insulating coating 12 that covers the outer periphery of the core wire 11 while the end portion of the core wire 11 is exposed is formed.

  Subsequently, the exposed core portion 111 formed in step S2 is formed into a target shape (specifically, the tip portion 111a is formed into a terminal connection portion shape F, and the lance corresponding portion 111b is formed into a locked shape D. In addition, for example, the entire exposed core wire portion 111 is welded and integrated with a plurality of strands forming the core wire 11 (step S3).

  Specifically, step S3 is performed by resistance welding using a mold, for example. Specifically, first, the exposed core part 111 is disposed between the pair of molds 51 and 52 (step S31). However, in each of the pair of molds 51 and 52, the surfaces 510 and 520 on the side facing the other mold have molding surfaces that can form the terminal connection portion shape F and the locked shape D. Is formed. That is, the lower side surface 510 of the mold 51 disposed on the upper side corresponds to the terminal connection portion shape F to be formed and the upper surface shape of the locked shape D, and the mold disposed on the lower side. The upper side surface 520 of 52 is set according to the terminal connection portion shape F to be formed and the bottom surface shape of the locked shape D.

  Subsequently, the pair of molds 51 and 52 are relatively moved in a direction in which they are close to each other, and the exposed core part 111 (for example, the entire exposed core part 111) is sandwiched between the pair of molds 51 and 52. Then, a current is passed between the pair of molds 51 and 52 from the power supply 53 to pressurize the exposed core part 111 sandwiched between the pair of molds 51 and 52 while heating (step S32). Thereby, in the exposed core part 111 sandwiched between the pair of molds 51 and 52, a plurality of strands are welded, and the exposed core part 111 sandwiched between the pair of molds 51 and 52 is It is molded into a shape corresponding to the molding surface of the molds 51 and 52. That is, the tip end portion 111 a of the exposed core portion 111 is formed into a terminal connection portion shape F, and the lance corresponding portion 111 b of the exposed core portion 111 is formed into a locked shape D.

  When a predetermined time elapses from the start of heating and pressurization, the current is stopped and the exposed core part 111 sandwiched between the pair of molds 51 and 52 is cooled. After cooling, the pair of molds 51 and 52 are separated from each other, and the exposed core part 111 is taken out (step S33).

  The insulated wire 1 is obtained by the above. Since the end of the insulated wire 1 is formed into the terminal connection portion shape F, it is not necessary to connect the terminal to the end again.

<3. Insertion into connector 9>
Next, the aspect which inserts the insulated wire 1 in the connector 9 is demonstrated, referring FIG. 3, FIG. FIG. 3 is a schematic perspective view showing the insulated wire 1 and the connector 9. FIG. 4 is a schematic cross-sectional view showing a state where the tip end portion 111 a of the exposed core portion 111 is normally inserted into the cavity 90.

  The connector 9 is formed of, for example, a non-conductive material (specifically, for example, a non-conductive resin material), and the outer frame portion 91 and the inside of the outer frame portion 91 are provided with a plurality of terminal accommodating chambers (so-called cavities). ) 90 partition walls (first partition wall 92 partitioning the space in the outer frame 91 in the height direction and second partition wall 93 partitioning the space in the outer frame 91 in the width direction) ,have.

  As for the insulated wire 1, the front-end | tip part 111a is accommodated in the cavity 90. FIG. In a state in which the tip end portion 111a of the insulated wire 1 is normally inserted into the cavity 90 (normally inserted state), the insulated wire 1 is disposed so that the tip thereof reaches a predetermined position H (see FIG. 4). State shown).

  In the cavity 90, for example, a lance 901 extending from the inner wall is formed, and the lance corresponding portion 111b of the exposed core portion 111 faces the lance 901 in the normal insertion state. As described above, since the lance corresponding portion 111b is formed in the locked shape D that can be caught by the lance 901, the lance corresponding portion 111b formed in the locked shape D in the normal insertion state is Engage with lance 901. This prevents the distal end portion 111a of the exposed core portion 111 from coming off the connector 9.

  The connector 9 in which the distal end portion 111a of the insulated wire 1 is accommodated in an appropriate state in the cavity 90 is fitted with the electrical equipment, the connector in which the counterpart terminal is accommodated, or the like, whereby the distal end portion 111a (that is, The tip end portion 111a formed into the terminal connection portion shape F fits with the mating terminal to be connected and is electrically connected to the mating terminal.

  By the way, in recent years, as an alternative to an insulated wire (so-called copper wire) in which a core wire mainly composed of copper is covered with an insulation coating, an insulated wire (so-called copper wire) in which a core wire mainly composed of aluminum is covered with an insulation coating. (Aluminum wire) is promising. Aluminum wires have the advantage of being lighter and cheaper than copper wires having equivalent conductive performance. On the other hand, since aluminum has a lower electrical conductivity than copper, replacing the place where copper wires were used with aluminum wires having equivalent conductive performance has the drawback that the wires become thicker. . Conventionally, as illustrated in FIG. 6, the terminal 8 is attached to the end portion of the insulated wire 80 to form a terminal-attached wire 800. In this case, the insulated wire 80 is replaced with a thicker insulated wire 80a. Then, as shown in the lower part of FIG. 6, when the terminal 8a connected to the end of the insulated wire 80a is to be inserted into the cavity 90 of the connector 9, the insulation coating 802a of the insulated wire 80a, Alternatively, there is a problem that the covering barrel portion 85a of the terminal 8a that is crimp-connected to the insulated wire 80a is caught at the entrance of the cavity 90 and the terminal 8a cannot be inserted to the normal position H in the cavity 90. May occur.

  However, unlike the conventional mode in which the terminal is connected to the end of the insulated wire, the terminal is not connected to the insulated wire 1 according to the above embodiment. Therefore, when the insulated wire 1 according to the above-described embodiment is employed, a situation in which the covered barrel portion of the terminal that is crimp-connected to the insulated wire is caught at the entrance of the cavity 90 as in the prior art does not occur. In particular, in the insulated wire 1 according to the above-described embodiment, the length of the exposed core portion 111 is the same as the entire length L of the portion of the core wire 11 to be disposed in the cavity 90 in the normal insertion state. Or, it is slightly longer than the length L (that is, the entire portion of the core wire 11 to be disposed in the cavity 90 in the normal insertion state is exposed from the insulating coating 12). , The end 120 of the insulating coating 12 is disposed outside the cavity 90. According to this configuration, the situation that the insulating coating 12 is caught at the entrance of the cavity 90 does not occur.

  Thus, if the insulated wire 1 which concerns on said embodiment is employ | adopted, even if it is a case where an insulated wire is changed into a thick thing, without changing the connector 9, the said insulated wire will be the cavity of the connector 9. 90 can be mounted well. Moreover, if the insulated wire 1 which concerns on said embodiment is employ | adopted, even if the diameter of an insulated wire is the same, the connector 9 can be reduced in size and space saving can be implement | achieved.

<4. Effect>
According to said embodiment, the front-end | tip part 111a of the exposed core part 111 is shape | molded by the terminal connection part shape F which can be directly contacted and connected with the other party terminal. According to this configuration, it is possible to establish an electrical connection with the counterpart terminal without connecting a terminal to the end of the insulated wire. That is, no terminal is required. Therefore, the number of parts in the connection part of the insulated wire 1 can be reduced. Further, as described above, since the terminal is not connected to the insulated wire 1, for example, even when the insulated wire is changed to a thicker one, the insulated wire is connected to the cavity 90 of the connector 9 without increasing the size of the connector. Can be worn well.

  Further, according to the above embodiment, a plurality of strands are welded at the tip end portion 111 a of the exposed core wire portion 111. According to this configuration, the strength of the tip portion 111a is increased and the molded shape is sufficiently maintained.

  Further, in the above-described embodiment, the entire portion of the core wire 11 to be disposed in the cavity 90 in the normal insertion state is exposed from the insulating coating 12. Therefore, the end 120 of the insulating coating 12 is disposed outside the cavity 90 in the normal insertion state. According to this configuration, a situation in which the insulating coating 12 is caught at the entrance of the cavity 90 does not occur. Therefore, even when the insulated wire is changed to a thick one, the insulated wire can be satisfactorily attached to the cavity 90 of the connector 9 without changing the connector 9.

  In the above-described embodiment, the lance corresponding portion 111 b of the exposed core portion 111 can be locked with the retaining portion (lance) 901 for retaining the cap formed in the cavity 90. It is molded into D. According to this configuration, the exposed core part 111 inserted into the cavity 90 is prevented from coming out of the cavity 90.

  Further, according to the above embodiment, the tip end portion 111a of the exposed core portion 111 is sandwiched between the pair of molds 51 and 52 and molded into the terminal connection portion shape F, while the pair of molds 51 and 52 is involved. A plurality of strands are welded by passing an electric current between them. According to this configuration, the tip portion 111a can be easily and quickly formed into the terminal connection portion shape F, and the strength of the tip portion 111a can be increased.

<5. Modification>
In the above embodiment, the length of the exposed core portion 111 is the same as the entire length L of the portion of the core wire 11 to be disposed in the cavity 90 in the normal insertion state, or the length L However, as shown in FIG. 5, the length of the exposed core part 111 may be shorter than the length. In this case, since the end of the insulating coating 12 enters the cavity 90, the core wire 11 is sufficiently protected in the vicinity of the entrance of the cavity 90.

  Further, in the above-described embodiment, the formation of the exposed core wire portion 111 and the welding of a plurality of strands in the exposed core wire portion 111 are performed simultaneously (step S3). However, the forming and the welding are not necessarily performed. It does not have to be performed at the same time. For example, first, a plurality of strands in the exposed core portion 111 may be welded, and then the exposed core portion 111 may be formed into a target shape by machining using a machine tool or the like.

  Further, for example, in the above-described embodiment, the welding of the exposed core part 111 is not necessarily essential. For example, after forming the exposed core portion 111 into a target shape using a mold or the like, a plurality of strands may be integrated by plating. Also by the plating, the strength of the exposed core part 111 is increased and the molded shape is maintained.

  In the above embodiment, the tip portion 111a of the exposed core portion 111 is formed into the terminal connection portion shape F, and at the same time, the lance corresponding portion 111b of the exposed core portion 111 is formed into the locked shape D. However, after the tip portion 111a is formed into the terminal connection portion shape F (or before that), the lance corresponding portion 111b may be formed into the locked shape D. For example, after forming the tip end portion 111a into the terminal connection portion shape F by resistance welding using a mold, the lance corresponding portion 111b is formed into the locked shape D by machining using a machine tool or the like. Also good.

  In the above embodiment, a plurality of strands forming the core wire 11 are welded by resistance welding, but this welding is performed by a method other than resistance welding (for example, ultrasonic welding). May be used. It is also preferable to select a welding method according to the material for forming the wire.

  Moreover, in said embodiment, although the core wire 11 shall be formed with the some strand, the core wire 11 may be comprised with the single wire of the metal wire. In this case, the exposed core part 111 may be formed into a target shape by machining using a machine tool or the like.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Insulated electric wire 11 Core wire 111 Exposed core part 111a Tip part 111b Lance corresponding part 12 Insulation coating 120 Insulation coating end 9 Connector 90 Cavity 51, 52 Mold 53 Power supply F Terminal connection part shape D Locked shape

Claims (9)

Core wire,
An insulating coating that covers an outer periphery of the core wire while exposing an end portion of the core wire;
With
The tip portion of the end portion is molded into a terminal connection portion shape that can be directly contacted with the counterpart terminal to be connected and connected to the counterpart terminal.
Insulated wire. The insulated wire according to claim 1,
The core wire is formed of a plurality of strands,
In the tip portion, the plurality of strands are welded,
Insulated wire. The insulated wire according to claim 1 or 2,
In a state where the tip portion is normally inserted into the cavity of the connector, the end of the insulating coating is disposed outside the cavity.
Insulated wire. The insulated wire according to any one of claims 1 to 3,
A part of the end portion is molded into a locked shape that can be hooked with a locking portion for retaining the stopper formed in the cavity of the connector.
Insulated wire. a) forming an insulating coating that covers the outer periphery of the core wire while exposing an end portion of the core wire;
b) forming the tip portion of the end portion into a terminal connection portion shape that can be directly contacted with a counterpart terminal to be connected and connected to the counterpart terminal;
A method for manufacturing an insulated wire, comprising: It is a manufacturing method of the insulated wire according to claim 5,
The core wire is formed of a plurality of strands,
In the step b), the plurality of strands in the tip portion are welded while forming the tip portion in the shape of the terminal connection portion.
Insulated wire manufacturing method. It is a manufacturing method of the insulated wire according to claim 6,
In the step b), an electric current is passed between the pair of molds while the tip portion is sandwiched between the pair of molds to form the terminal connection portion. Welding the plurality of strands,
Insulated wire manufacturing method. A method for manufacturing an insulated wire according to any one of claims 5 to 7,
In the step a),
Exposing the entire portion of the core wire to be disposed in the cavity in a state in which the tip portion is normally inserted into the cavity of the connector from the insulating coating;
Insulated wire manufacturing method. A method for manufacturing an insulated wire according to any one of claims 5 to 8,
c) forming a shape portion that can be hooked with a retaining portion formed in the cavity at the end portion;
A method for manufacturing an insulated wire, comprising:

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