JP7028622B2 - Wire with terminal and its manufacturing method - Google Patents

Description

The present invention relates to, for example, an electric wire with a terminal used in an automobile or the like and a method for manufacturing the same.

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

On the other hand, as environmental problems are attracting attention, weight reduction of automobiles is required. Therefore, an increase in weight due to an increase in the amount of wire harness used becomes a problem. Therefore, instead of the conventionally used copper wire, a lightweight aluminum electric wire is attracting attention.

Here, a connection terminal is used when connecting such electric wires or in a connection portion of equipment or the like. However, even in the case of an electric wire with a terminal using an aluminum electric wire, copper having excellent electrical characteristics may be used for the terminal portion because of the reliability of the connection portion and the like. In such a case, the aluminum electric wire and the copper terminal are joined and used.

However, when dissimilar metals are brought into contact with each other, so-called galvanic corrosion may occur due to the difference in standard electrode potential. In particular, since the standard electrode potential difference between aluminum and copper is large, corrosion on the electrically base aluminum side progresses due to the influence of water scattering and dew condensation on the contact portion. For this reason, the connection state between the electric wire and the terminal at the connection part becomes unstable, and there is a risk that the contact resistance will increase, the electrical resistance will increase due to the decrease in the wire diameter, and the wire will break, resulting in malfunction or malfunction of the electrical components. be.

Therefore, a method of covering the connection portion between the electric wire and the terminal with a food-proof material has been proposed. For example, there has been proposed an electric wire with a terminal coated by applying a food-proof material to a conductor wire exposed between a coated crimping portion and a conducting wire crimping portion (Patent Document 1).

JP-A-2017-102998

FIG. 7A is a vertical sectional view showing a conventional electric wire with a terminal 100, and FIG. 7B is a sectional view taken along line the coated crimping portion 109. The electric wire 100 with a terminal is configured by connecting the terminal 101 and the covered lead wire 111. In the coated conductor 111, the coated portion 115 at the tip thereof is removed, and the internal conductor 113 is exposed. The conductor 113 exposed from the tip of the coated conductor 111 is crimped by the conductor crimping portion 107 of the terminal 101, and the coated portion 115 is crimped by the coated crimping portion 109. At this time, as shown in FIG. 7B, a gap may be formed between the covering portion 115 and the covering crimping portion 109.

From this state, as shown in the figure, when the food-proof material 117 is applied to the barrel-to-barrel portion 108 between the coating crimping portion 109 and the wire crimping portion 107, a part of the food-proof food material 117 is as shown in FIG. 7 (b). , Flows to the rear end side of the covering crimping portion 109 along the gap between the covering portion 115 and the covering crimping portion 109 (arrow Y in FIG. 7A). Alternatively, a part of the food-proof material 117 flows on the upper surface of the coated crimping portion 109 and flows to the rear end side of the coated crimping portion 109 (arrow X in FIG. 7A).

If a part of the food-proof material 117 flows out to the rear end side of the coating crimping portion 109 in this way, the form of the food-proof food material 117 that originally covers the conducting wire 113 or the like exposed to the barrel inter-barrel portion 108 or the like is not stable. .. For example, even if the coating amount of the food-proof food material 117 is controlled to be constant, if most of the food-proof food material 117 applied flows out to the rear, a sufficient coating thickness cannot be secured and sufficient anticorrosion performance is exhibited. I can't.

In particular, in the example shown in FIG. 7B, the barrels of the covering crimping portion 109 are abutted and crimped, but in the case of the covering crimping portion 109 in which the barrels wrap each other, the gap with the covering portion 115 May be larger. Therefore, the amount of flow of the food-proof material 117 tends to increase. On the other hand, if the viscosity of the food-proof food 117 at the time of application is increased, the amount of flow is suppressed, but the food-proof food 117 does not easily flow into the spaces between the strands of the conducting wire 113, and the corrosion-proof performance deteriorates due to insufficient filling of the food-proof food 117. There is a fear.

The present invention has been made in view of such a problem, and is an electric wire with a terminal capable of exhibiting high anticorrosion performance by preventing the food-proof material from flowing to the rear end side of the coated crimping portion. The purpose is to provide a manufacturing method.

In order to achieve the above-mentioned object, the first invention is an electric wire with a terminal to which a coated wire and a terminal are connected, and the coated wire includes a covered portion and a wire exposed from the tip of the coated portion. The terminal has a terminal body and a crimping portion, and the crimping portion includes a lead wire crimping portion to which the lead wire is crimped, a coated crimping portion to which the covering portion is crimped, the lead wire crimping portion, and the crimping portion. It is provided with an inter-barrel portion formed so as to expose a part of the covering portion and a part of the lead wire between the coating crimping portion, and at least from the inter-barrel portion to the lead wire crimping portion. The portion where the lead wire is exposed is covered with a food-proof material, and a flow prevention mechanism is formed on the coated crimping portion side to prevent the food-proof material before curing from flowing to the rear end side of the coated crimping portion. The flow prevention mechanism is a flow prevention material formed so as to be in contact with at least a part of the covering crimping portion and at least a part of the covering crimping portion, and the flow prevention material is attached to the lower part of the rear end of the covering crimping portion. It is an electric wire with a terminal characterized by being provided with a receiving portion for collecting.
The second invention is an electric wire with a terminal to which a coated wire and a terminal are connected. The coated wire includes a covered portion and a wire exposed from the tip of the coated portion, and the terminal is a terminal. The crimping portion has a main body and a crimping portion, and the crimping portion is between a lead wire crimping portion to which the lead wire is crimped, a coated crimping portion to which the covering portion is crimped, and the lead wire crimping portion and the covering crimping portion. An inter-barrel portion formed so as to expose a part of the covering portion and a part of the lead wire, respectively, and at least a portion where the lead wire from the inter-barrel portion to the lead wire crimping portion is exposed. A flow prevention mechanism is formed on the coated crimping portion side, which is covered with a food-proof material and prevents the food-proof material before curing from flowing to the rear end side of the coated crimping portion. A flow-preventing material formed so as to be in contact with at least a part of the coated crimping portion and at least a part of the covering portion, and on the bottom surface of the transition portion having an upper opening between the crimping portion and the terminal body. The electric wire with a terminal is characterized in that another flow prevention material is further applied to a position separated from the wire crimping portion.

In the first and second inventions, it is desirable that the flow prevention mechanism is formed on the rear end side of the coated crimping portion.

It is desirable that the upper end of the flow prevention mechanism is arranged so as to be located above the uppermost portion of the covering crimping portion.

It is desirable that the flow preventive material is a photocurable resin.

According to the first and second inventions, a flow prevention mechanism for suppressing the flow of the food-proof material to the rear end side of the covering crimping portion is formed separately from the food-proof food material, so that the form of the food-proof food material is stable. High anticorrosion performance can be ensured.

Further, by forming the flow prevention material as the flow prevention mechanism, the flow of the food prevention material can be easily suppressed.

In particular, by forming the flow prevention material on the rear end side of the coated crimping portion, it is possible to suppress the amount of the flow prevention material used and to prevent the flow prevention material from flowing toward the barrel-to-barrel portion.

Further, by forming the flow prevention material so as to swell above the covering crimping portion, it is possible to prevent the food-preventing food from flowing behind the covering crimping portion along the upper part of the covering crimping portion.

Further, if the flow preventing material is a photocurable resin, it can be cured in a short time and no heat treatment is required.

A third invention is a method for manufacturing an electric wire with a terminal to which a coated wire and a terminal are connected. The coated wire includes a covered portion and a wire exposed from the tip of the coated portion, and the terminal is provided. Has a terminal body and a crimping portion, and the crimping portion includes a lead wire crimping portion to which the lead wire is crimped, a coated crimping portion to which the covering portion is crimped, and the lead wire crimping portion and the covering crimping portion. An inter-barrel portion is provided, and the coated lead wire and the terminal are connected by crimping, and then a flow prevention material is provided so as to be in contact with at least a part of the coated crimping portion and at least a part of the electric wire coating. It is a method for manufacturing an electric wire with a terminal, characterized in that, after being applied and cured, at least a portion from the space between barrels to the crimping portion of the conducting wire is coated with a food-proof material and cured. ..

It is desirable that the flow-preventing material is a photo-curing resin and the flow-preventing material is cured by light irradiation.

According to the third invention, it is possible to easily manufacture an electric wire with a terminal capable of stabilizing the form of the food-proof material and ensuring high anticorrosion performance.

Further, if the flow prevention material is cured by light irradiation, the flow prevention material can be cured in a short time.

According to the present invention, it is possible to provide an electric wire with a terminal capable of exhibiting high anticorrosion performance by preventing the food-proof material from flowing to the rear end side of the coated crimping portion, and a method for manufacturing the same.

The perspective view which shows the electric wire 10 with a terminal. The cross-sectional view which shows the electric wire 10 with a terminal. (A) is a diagram showing a state in which the flow prevention material 19 is arranged, and (b) is a diagram showing another state in which the flow prevention material 19 is arranged. (A) is a diagram showing a state in which the flow prevention material 19 is arranged, and (b) is a diagram showing another arrangement method of the flow prevention material 19. (A) is a diagram showing a state in which the flow prevention material 19a is arranged, and (b) is a diagram showing a state in which the food prevention material 17 is further arranged. (A) is a diagram showing a state in which a flow prevention protrusion 19b is formed on the terminal 1 before crimping, and (b) is a diagram showing a state in which a flow prevention material 19c is arranged on the terminal 1 before crimping. (A) is a cross-sectional view showing a conventional electric wire with a terminal 100, and (b) is a cross-sectional view of a coated crimping portion 109.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an electric wire 10 with a terminal, and FIG. 2 is a sectional view. Note that FIG. 1 is a perspective view of the food-preventing material 17 and the flow-preventing material 19. The electric wire 10 with a terminal is configured by connecting the terminal 1 and the covered lead wire 11.

The coated conductor 11 includes a conductor 13 made of an aluminum-based material and a covering portion 15 that covers the conductor 13. That is, the coated conductor 11 includes a coated portion 15 and a conductor 13 exposed from the tip thereof. The conductor 13 is, for example, a stranded wire in which a plurality of strands are twisted together.

The terminal 1 is an open barrel type and is made of a copper-based material. A coated conducting wire 11 is connected to the terminal 1. The terminal 1 is configured by connecting the terminal body 3 and the crimping portion 5 via the transition portion 4. The transition portion 4 located between the crimping portion 5 and the terminal body 3 opens upward.

The terminal body 3 is formed by forming a plate-shaped material having a predetermined shape into a tubular body having a rectangular cross section. The terminal body 3 has an elastic contact piece formed by folding a plate-shaped material into a rectangular cylinder. The terminal body 3 is connected by inserting a male terminal or the like from the front end portion. In the following description, an example is shown in which the terminal body 3 is a female terminal that allows insertion of an insertion tab (not shown) such as a male terminal, but in the present invention, the detailed shape of the terminal body 3 is shown. Is not particularly limited. For example, instead of the female terminal body 3, for example, a male terminal insertion tab may be provided.

The crimping portion 5 is a portion to be crimped to the coated conducting wire 11, and before crimping, the crimping portion 5 has a barrel shape having a substantially U-shaped cross section perpendicular to the longitudinal direction of the terminal 1. The crimping portion 5 of the terminal 1 has a lead wire crimping portion 7 that crimps the lead wire 13 exposed from the coated lead wire 11 to the tip end side of the coated lead wire 11, a coated crimping portion 9 that crimps the coated portion 15 of the coated lead wire 11, and a lead wire crimping portion. It is composed of a barrel-to-barrel portion 8 between the portion 7 and the covering crimping portion 9.

A part of the inner surface of the wire crimping portion 7 is provided with serrations (not shown) in the width direction (direction perpendicular to the longitudinal direction). By forming the serrations in this way, when the conductor 13 is crimped, the oxide film on the surface of the conductor 13 is easily broken, and the contact area with the conductor 13 can be increased.

At the tip of the coated conductor 11, the coated portion 15 is peeled off, and the inner conductor 13 is exposed. The coated portion 15 of the coated conductor 11 is crimped by the coated crimping portion 9 of the terminal 1. Further, the conductor 13 exposed by peeling off the covering portion 15 is crimped by the conductor crimping portion 7. In the conductor crimping portion 7, the conductor 13 and the terminal 1 are electrically connected. The end face of the covering portion 15 is located at the barrel-to-barrel portion 8 between the covering crimping portion 9 and the lead wire crimping portion 7.

In the present invention, at least the conductor 13 exposed from the covering portion 15 is covered with the food-proof material 17. That is, at least the portion where the conductor 13 from the barrel inter-barrel portion 8 to the conductor crimping portion 7 is exposed is covered with the food-proof material 17, and the conductor wire 13 is not exposed to the outside by the food-proof material 17. The food-proof material 17 is, for example, an ultraviolet curable resin such as silicone acrylate, urethane acrylate, and acrylic acrylate.

A flow prevention material 19 which is a flow prevention mechanism is arranged on the rear end side of the covering crimping portion 9. The flow preventive material 19 is, for example, an ultraviolet curable resin such as silicone acrylate, urethane acrylate, and acrylic acrylate. The flow prevention material 19 and the food prevention material 17 may be in contact with each other. The details will be described later, but even in this case, since the formation timings of the two are different, the boundary can be identified by an optical microscope or a polarizing microscope after the cross-section polishing.

Next, a method of manufacturing the electric wire 10 with a terminal will be described. First, the coated conductor wire 11 and the terminal 1 are connected by crimping. Next, as shown in FIG. 3A, the flow prevention material 19 is applied to the rear end side of the covering crimping portion 9. That is, the flow prevention material 19 is applied so as to be in contact with at least a part of the covering crimping portion 9 and at least a part of the covering portion 15.

Here, in the present invention, the application of the flow prevention material 19 is a method of bringing a droplet formed in the supply portion of the flow prevention material 19 into contact with the target portion, or ejecting a droplet of the flow prevention material 19 from the supply portion. It shall include all methods for obtaining a state in which the flow preventive material 19 is attached to the target portion, such as a method of attaching the target portion (by dropping). For example, the flow preventive material 19 may be applied to the target portion with a jet dispenser or a mechanical dispenser.

When the flow preventive material 19 is applied to the rear end portion of the cover crimping portion 9 (near the boundary between the coated crimping portion 9 and the exposed portion of the covering portion 15), a part of the flow prevention material 19 is moved from above to below the covering crimping portion 9. And closes the rear end portion of the covering crimping portion 9 over the entire circumference. Further, a part of the flow prevention material 19 also flows to the lower part in front of the covering crimping portion 9. At this time, it is desirable that a part (upper end) of the flow prevention material 19 is arranged so as to swell above the uppermost portion of the covering crimping portion 9.

In this state, the flow preventive material 19 is cured. After that, at least the portion where the lead wire 13 from the barrel inter-barrel portion 8 to the lead wire crimping portion 7 is exposed is coated with the food-proof material 17 and the food-proof material 17 is cured, whereby the electric wire 10 with a terminal can be manufactured. For example, as described above, when the food-proof material 17 or the flow-preventing material 19 is a photocurable resin, the food-proof food 17 or the flow-preventing material 19 can be cured by light irradiation. When the food-proof material 17 or the flow-preventing material 19 is other than the photocurable resin, the food-proof food material 17 or the flow-preventing material 19 is cured by appropriately using a method such as heat.

At this time, since the flow prevention material 19 is arranged above the covering crimping portion 9, this serves as a weir, and the food preventing food material 17 does not flow backward along the upper part of the covering crimping portion 9. Further, since the gap between the covering crimping portion 9 and the covering portion 15 is closed at the rear end portion of the covering crimping portion 9, the food-proof food material 17 travels backward through the gap between the covering crimping portion 9 and the covering portion 15. Flow is suppressed. That is, the flow prevention material 19 functions as a flow prevention mechanism for suppressing the flow of the food-preventing food material 17 before curing to the rear end side of the coating crimping portion 9 on the covering crimping portion 9 side.

In the example shown in FIG. 3A, the flow prevention material 19 is arranged only at the rear end portion of the covering crimping portion 9, but the present invention is not limited to this. For example, as shown in FIG. 3B, the flow prevention material 19 may be arranged so as to cover the covering crimping portion 9. That is, the flow prevention material 19 may be formed so as to be in contact with at least a part of the covering crimping portion 9 and at least a part of the covering portion 15. Even in this case, a part of the flow prevention material 19 flows below the covering crimping portion 9 and also flows into the gap between the covering crimping portion 9 and the covering portion 15 to close the coating, and covers the food-proof material 17 as described above. It is possible to suppress the flow of the crimping portion 9 to the rear side.

If the flow prevention material 19 excessively flows in the direction of the conductor 13, it may hinder the coating of the conductor 13 by the food-proof material 17 to be applied thereafter. Further, if the entire covering crimping portion 9 is covered with the flow prevention material 19, the amount of the flow prevention material 19 used increases. Therefore, as shown in FIG. 3A, if a sufficient flow-preventing effect can be obtained by applying only to the rear end portion of the coated crimping portion 9, the entire coated crimping portion 9 is covered with the flow-preventing material 19. do not have to. In the case of a large electric wire and the length of the coated crimping portion 9 is long, the flow preventing material 19 is applied only to the front end portion of the covering crimping portion 9, and the flow preventing material 19 is coated and crimped. The gap between 9 and the covering portion 15 may be filled.

Further, in order to efficiently arrange the flow prevention material 19 below the rear end portion of the covering crimping portion 9, as shown in FIG. 4A, a receiving portion 20 is provided at the lower portion of the rear end of the covering crimping portion 9. You may. The receiving portion 20 projects rearward at the lower portion of the covering crimping portion 9. Therefore, when the flow prevention material 19 is applied above the rear end portion of the covering crimping portion 9, the flow preventing material 19 accumulates in the receiving portion 20 and efficiently fills the gap between the lower portion of the covering crimping portion 9 and the covering portion 15. Can be filled.

Further, as shown in FIG. 4B, the same effect may be obtained by tilting the rear end side of the covering crimping portion 9 upward when the flow prevention material 19 is applied. In this state, if the flow prevention material 19 is applied above the rear end portion of the covering crimping portion 9, the flow preventing material 19 can be efficiently filled in the gap between the lower portion of the covering crimping portion 9 and the covering portion 15.

As described above, according to the present embodiment, by forming the flow prevention material 19 first, when the food prevention material 17 is subsequently applied, the foodstuff prevention material 17 flows behind the covering crimping portion 9. Can be suppressed. Therefore, the anticorrosion material 17 can be surely permeated into the inside and the lower part of the conductor 13 required for anticorrosion, and the anticorrosion effect can be efficiently obtained. When the food-preventing material 17 is applied, for example, a part of the flow-preventing material 19 is already cured in a state of flowing from the rear to the front of the covering crimping portion 9. Therefore, a part of the food-preventing material 17 applied later is overlapped on the already hardened flow-preventing material 19 from the front of the coated crimping portion 9 toward the rear of the coated crimping portion 9 to some extent. , It flows along the flow prevention material 19, but the flow prevention material 19 further suppresses the flow to the rear.

Further, if the flow prevention material 19 is a photocurable resin, the flow prevention material 19 can be cured in an extremely short time. It is desirable that the flow preventive material 19 has a low viscosity so that the flow preventive material 19 flows to the lower part of the covering crimping portion 9 in a short time after the application. In particular, the flow-preventing material 19 does not need to have a large hardness as long as it can prevent the flow of the food-proof material 17, and may have a low concentration and a low viscosity in order to reduce the amount used. On the other hand, since the food-proof material 17 needs to have some strength and permeability to the conducting wire 13, the viscosity of the food-proof food material 17 may be higher than the viscosity of the flow-preventing material 19. Further, the hardness of the food-preventing material 17 after curing may be higher than the hardness of the flow-preventing material 19 after curing.

Further, by arranging the flow prevention material 19 so as to swell above the covering crimping portion 9, it becomes a weir of the food-proof material 17 and suppresses the food-proof material 17 from flowing backward along the upper surface of the covering crimping portion 9. be able to.

Further, by providing a receiving portion 20 at the lower end of the covering crimping portion 9 or tilting the rear end of the covering crimping portion 9 upward when the flow preventing material 19 is applied, the flow preventing material 19 can be efficiently coated and crimped. It can be placed at the bottom of the rear end.

Next, the second embodiment will be described. 5 (a) and 5 (b) are diagrams showing a method of manufacturing an electric wire with a terminal according to a second embodiment. In the following description, the same reference numerals as those in FIGS. 1 to 4 will be given to the configurations having the same functions as those of the first embodiment, and duplicate description will be omitted.

In the present embodiment, first, as shown in FIG. 5A, the flow prevention material 19 is formed by the method described above, and the flow prevention material 19a is applied on the bottom surface of the transition portion 4. At this time, it is desirable that the flow prevention material 19a is formed over the entire width of the transition portion 4. For example, the flow prevention material 19a may be applied to the center of the transition portion 4 in the width direction to spread the flow prevention material 19a over the entire width, or the flow prevention material 19a may be applied to a plurality of places in the width direction.

The flow prevention material 19a is formed at a position separated from the conductor crimping portion 7 (or the tip of the conductor 13 exposed from the conductor crimping portion 7). That is, a gap is formed between the flow prevention material 19a and the conductor crimping portion 7 (or the tip of the conductor 13 exposed from the conductor crimping portion 7) in the longitudinal direction of the terminal 1. By forming the gap in this way, it is possible to form a resin pool of the food-proof food material 17 to be applied thereafter.

Next, as shown in FIG. 5B, when the food-proof material 17 is applied, as described above, the flow-preventing material 19 can prevent the food-proof food 17 from flowing to the rear of the covering crimping portion 9. can. Further, the flow prevention material 19a can also prevent the food prevention material 17 from flowing to the terminal body 3 side.

According to the second embodiment, the same effect as that of the first embodiment can be obtained. Further, by forming the flow prevention material 19a, it is possible to prevent the food prevention material 17 covering the conducting wire 13 and the like from flowing to the terminal body 3 side.

Next, a third embodiment will be described. FIG. 6A is a diagram showing the terminal 1 before crimping according to the third embodiment. In the present embodiment, the flow prevention protrusion 19b protruding toward the inner surface side of the covering crimping portion 9 is formed. Similar to the flow prevention material 19, the flow prevention protrusion 19b functions as a flow prevention mechanism for suppressing the flow of the food prevention material 17 behind the covering crimping portion 9.

When the coated conductive wire 11 is crimped from this state, the flow prevention protrusion 19b is formed on the inner surface of the coated crimping portion 9, so that the gap between the covering crimping portion 9 and the covering portion 15 described above is closed to prevent the coating. The flow of the food material 17 is suppressed.

As shown in FIG. 6B, a flow prevention material 19c may be provided instead of the flow prevention protrusion 19b formed by deforming a part of the covering crimping portion 9. The flow prevention material 19c may be applied to the inner surface of the coated crimping portion 9 to cure the terminal 1 before crimping, and the coated conducting wire 11 may be crimped in this state. Even in this way, since the convex shape is formed on the inner surface of the covering crimping portion 9, the gap between the covering crimping portion 9 and the covering portion 15 described above is closed, and the flow of the food-proof material 17 is suppressed. To.

According to the third embodiment, the same effect as that of the first embodiment can be obtained. Further, by forming a convex portion on the inner surface of the covering crimping portion 9, it is possible to prevent the food-proof material 17 from flowing to the terminal body 3 side. As described above, the flow prevention mechanism may be other than the flow prevention material 19 as long as the food prevention material 17 can be prevented from flowing to the rear end side of the covering crimping portion 9.

Further, in order to obtain the anticorrosion effect more efficiently, the vicinity of the crimping portion 5 may be heated after applying the resin constituting the flow prevention material 19 or the food prevention material 17. By heating, the viscosity of the resin can be lowered, and the resin can be easily permeated into the gap between the coated crimping portion 9 and the coated portion 15, between the strands of the conducting wire 13, and the lower part of the conducting wire 13. In addition, since the air inside is expelled, the air pool can be reduced. In order to obtain such an effect, for example, the heating temperature may be adjusted so that the resin viscosity is 10 mPa · s or less, or the contact angle with the terminal is 10 ° or less.

Further, the coated conductor 11 may be cooled after the resin is sufficiently infiltrated. By doing so, the air inside contracts, and the resin can permeate between the lines and the like.

Although the embodiments of the present invention have been described above with reference to the attached drawings, the technical scope of the present invention does not depend on the above-described embodiments. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the technical ideas described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs to.

For example, it goes without saying that the above-mentioned configurations can be combined with each other.

1 ………… Terminal 3 ………… Terminal body 4 ………… Transition part 5 ………… Crimping part 7 ………… Conductor crimping part 8 ………… Barrel inter-barrel part 9 ………… Covered crimping part 10 ………… With terminal Electric wire 11 ………… Covered conductor 13 ………… Conductor 15 ………… Covered part 17 ………… Food-proof material 19, 19a, 19c ………… Flow-preventing material 19b ………… Flow-proof protrusion 20 ………… Receiving part 100… …… Wire with terminal 101 ………… Terminal 107 ………… Conductor crimping part 108 ………… Barrel-to-barrel part 109 ………… Covered crimping part 111 ………… Covered conductor 113 ………… Conductor 115 ………… Covered part 117 …… ...... Ingredients

Claims (7)

An electric wire with a terminal that connects a covered conductor and a terminal.
The coated conductor includes a coated portion and a conductor exposed from the tip of the coated portion.
The terminal has a terminal body and a crimping portion.
The crimping portion is a part of the covering portion and the conducting wire between the conducting wire crimping portion where the conducting wire is crimped, the covering crimping portion where the covering portion is crimped, and the conducting wire crimping portion and the covering crimping portion. It is provided with an inter-barrel portion formed so as to expose a part of each of the above.
At least, the portion from the barrel-to-barrel portion to the lead wire crimping portion where the lead wire is exposed is covered with a food-proof material, and on the coated crimping portion side, the food-proof material before curing is on the rear end side of the coated crimping portion. A flow prevention mechanism is formed to suppress the flow to
The flow prevention mechanism is a flow prevention material formed so as to be in contact with at least a part of the coating crimping portion and at least a part of the coating portion.
An electric wire with a terminal, characterized in that a receiving portion for collecting the flow prevention material is provided at the lower part of the rear end of the coated crimping portion. An electric wire with a terminal that connects a covered conductor and a terminal.
The coated conductor includes a coated portion and a conductor exposed from the tip of the coated portion.
The terminal has a terminal body and a crimping portion.
The crimping portion is a part of the covering portion and the conducting wire between the conducting wire crimping portion where the conducting wire is crimped, the covering crimping portion where the covering portion is crimped, and the conducting wire crimping portion and the covering crimping portion. It is provided with an inter-barrel portion formed so as to expose a part of each of the above.
At least, the portion from the barrel-to-barrel portion to the lead wire crimping portion where the lead wire is exposed is covered with a food-proof material, and on the coated crimping portion side, the food-proof material before curing is on the rear end side of the coated crimping portion. A flow prevention mechanism is formed to suppress the flow to
The flow prevention mechanism is
It is a flow prevention material formed so as to be in contact with at least a part of the covering crimping portion and at least a part of the covering portion.
An electric wire with a terminal, characterized in that another flow prevention material is further applied to a position separated from the lead wire crimping portion on the bottom surface of the transition portion in which the upper part between the crimping portion and the terminal body opens. The electric wire with a terminal according to claim 1 or 2 , wherein the flow prevention mechanism is formed on the rear end side of the coated crimping portion. The electric wire with a terminal according to any one of claims 1 to 3 , wherein the upper end of the flow prevention mechanism is arranged so as to be located above the uppermost portion of the coated crimping portion. The electric wire with a terminal according to any one of claims 1 to 4 , wherein the flow prevention material is a photocurable resin. It is a method of manufacturing an electric wire with a terminal that connects a covered conductor and a terminal.
The coated conductor includes a coated portion and a conductor exposed from the tip of the coated portion.
The terminal has a terminal body and a crimping portion.
The crimping portion includes a lead wire crimping portion to which the lead wire is crimped, a coated crimping portion to which the covering portion is crimped, and a barrel-to-barrel portion between the conducting wire crimping portion and the covering crimping portion.
The coated conductor and the terminal are connected by crimping, and then
After applying the anti-flow material so as to be in contact with at least a part of the coated crimping portion and at least a part of the covering portion and then curing, at least the lead wire from the barrel inter-barrel portion to the lead wire crimping portion is exposed. A method for manufacturing an electric wire with a terminal, which is characterized by applying a protective ingredient to the part to be hardened and curing it. The method for manufacturing an electric wire with a terminal according to claim 6 , wherein the flow prevention material is a photocurable resin, and the flow prevention material is cured by light irradiation.

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