JP5846981B2 - Connection terminal, connection structure, and manufacturing method of connection structure - Google Patents

Description

  This invention is, for example, a connection terminal mounted on a connector or the like for connecting an automobile wire harness, and a connection structure in which a wire harness made of an aluminum-based conductor and a connection terminal made of a different material from an aluminum-based material are connected And a method of manufacturing the connection structure.

  In the fields of automobiles, office automation equipment, and home appliances, copper wires having a core wire made of a copper-based material having excellent conductivity have been used as signal lines and power lines. In particular, in the automobile field, since the high performance and high functionality of vehicles are being promoted rapidly, the amount of electric wires used tends to increase with the increase in various on-vehicle electric devices and control devices. There is the present situation.

  On the other hand, demands for improving fuel efficiency by reducing the weight of vehicles are rapidly increasing, and aluminum wires that are lighter than copper wires are attracting particular attention in the automotive field.

However, when aluminum wires are actually used for automobiles, there arises a problem that foreign metal contact corrosion (hereinafter referred to as “electric corrosion”) occurs.
For example, when the metal material constituting each of the terminal of the external electrical device and the conductor of the electric wire is a different metal material, the insulating coating on the tip side is peeled off and exposed in the coated electric wire covering the conductor with the insulating coating. When the tip of the wire is connected to a connection terminal composed of a metal material different from the conductor of the wire, and connected to the terminal of the external electrical device via the connection terminal, the connection portion is eroded due to the presence of water or moisture. There's a problem.

  In this case, when the connection part of different metals gets wet by running, car washing, or dew condensation in rainy weather, ionization of the aluminum base terminal which is electrically base proceeds to promote electrolytic corrosion. As a result, the contact state of the terminal part deteriorates and the electrical characteristics become unstable.In addition, the electrical resistance increases due to an increase in contact resistance or a decrease in wire diameter due to electrolytic corrosion, and further disconnection causes malfunction of electrical components. It can also be considered that the function is stopped.

  In particular, when aluminum-based terminals and copper-based terminals are connected among different types of metal terminals, the difference in standard electrode potential between the terminals increases, so that electric corrosion tends to occur.

As a conventional method for preventing such electric corrosion, Patent Document 1 below proposes an aluminum wire terminal.
In the terminal for an aluminum electric wire in Patent Document 1, the terminal rear end portion is formed of an aluminum-based material, the terminal tip end portion is formed of a copper-based material, the terminal rear end portion and the terminal tip end portion are joined, It is the connection terminal comprised by sealing a part with an insulator.

  According to Patent Document 1, with such a configuration, an aluminum electric wire is connected to a terminal rear end portion formed of an aluminum-based material, and a copper terminal of a connection counterpart is connected to a terminal tip portion formed of a copper-based material. In addition, it is disclosed that, by resin-sealing the connecting portion between the terminal front end portion and the terminal rear end portion, water corrosion does not adhere to the connecting portion and electrolytic corrosion can be prevented.

However, the aluminum wire terminal in Patent Document 1 has the following problems.
As in the case of the aluminum electric wire terminal in Patent Document 1, in the case where the connection portion between the terminal front end portion and the terminal rear end portion is sealed (molded) with resin, the outer diameter of the terminal is increased, and therefore the connection portion of the wire harness There is a problem of increasing the size. In addition, since the molded portion has a shape in which the resin protrudes outside the terminal, there is a problem that the resin layer is destroyed by handling when the terminal is accommodated in the connector, and electric corrosion cannot be prevented.

JP 2004-111058 A

  Therefore, the present invention suppresses electrolytic corrosion generated between different kinds of metals without the bulk of the anticorrosion treatment part such as resin, and a connection terminal having electrical characteristics that are stable over time, and a connection in which the connection terminal and the electric wire are connected. An object is to provide a structure and a method for manufacturing a connection structure.

The present invention, in the leading end side of the electric wire, the connection of the conductor tip of configured wire tip at the front end side of the insulating coating end portion of the insulating coating and the conductor tip insulating coating has been removed to cover the conductive A wire connection permission portion composed of a conductor connection permission portion that allows connection and an insulation coating connection permission portion that allows connection of the tip end portion of the insulation coating, and a mating terminal connection permission portion that permits connection with a connection partner terminal. Doo is Rutotomoni is configured by disposing in series, a connection terminal made of a metal nobler than metal constituting the conductor, the conductor connection permission unit, and the conductor arrangement bottom of arranging the conductor tip be constituted by a conductor surrounding portion surrounding said conductor tip disposed in the conductor arrangement bottom, said the conductor surrounding portion, viewing allowable opening is visibly open the inner conductor surrounding portion is formed The conductor置底portion, and at least a portion of the conductor surrounding portion, the anticorrosion treatment unit for preventing electrolytic corrosion of the conductive portion is formed, in the insulating cover connection permission unit, insulating coating disposed bottom to place the insulating coating tip Provided,
While arranging the conductor tip at the conductor placement bottom, and in the state where the insulation coating tip is placed at the insulation coating placement bottom, compared to the case where the conductor coating is placed at the same height as the insulation coating placement bottom, It is arranged in a raised structure in which the conductor arrangement bottom is raised with respect to the insulation coating arrangement bottom so that the distance between the center axis of the conductor tip and the center axis of the insulation coating tip is small, A bottom surface connecting the bottom-up conductor arrangement bottom portion and the bottom surface of the counterpart terminal connection permission portion is formed of an inclined surface, and a through-hole is formed in the inclined surface of the conductor surrounding portion. To do.

  According to the configuration described above, by surrounding the conductor tip portion with the conductor surrounding portion, it is possible to guide the electrolytic solution not to adhere to the contact portion between the conductor tip portion and the conductor arrangement bottom portion.

  Thereby, compared with the case where the conductor surrounding portion is not formed in the conductor connection allowance portion, it is possible to make it difficult for the electrolyte to adhere to the conductor tip portion. It can suppress that the conductor connection part with a part erodes.

  Furthermore, by forming an anticorrosion treatment portion for preventing electrolytic corrosion of the conductor portion at least at a part of the conductor arrangement bottom portion and the conductor surrounding portion, it is possible to more reliably prevent the conductor connection portion from being electrolytically corroded. .

  For this reason, the anticorrosion treatment part, for example, thinly coats with a resin film on the surface of at least a part of the conductor arrangement bottom part and the conductor surrounding part, or electroplating of the conductor part to such an extent that it is plated. Can be prevented.

  Therefore, it is possible to prevent galvanic corrosion of the conductor portion without firmly sealing with resin as in the prior art to the conductor connection portion where the conductor tip portion is connected to the conductor connection allowable portion. For example, a material such as a resin required for forming the anticorrosion treatment portion can be reduced, and the formation time for forming the anticorrosion treatment portion can be greatly shortened.

  Further, it is possible to visually inspect the connection state in which the conductor tip is connected by the conductor connection permission portion.

  Specifically, as described above, by forming the conductor surrounding portion in the conductor connection allowance portion, as in the conventional case, the electric corrosion resistance of the conductor connection portion between the conductor tip portion and the conductor connection allowance portion is also ensured. be able to.

  Therefore, the anticorrosion treatment part has excellent anticorrosion performance of the conductor connection part even if it is not formed thick enough to hide the uneven shape on the surface of the conductor connection part in which the conductor tip part is connected by the conductor connection allowable part. In addition, the connection state between the conductor tip and the conductor connection allowing portion can be easily confirmed visually.

  In addition, even if the conductor surrounding portion is formed in the conductor connection allowing portion, the conductor tip portion inside the conductor surrounding portion can be visually recognized through the visual recognition opening formed in the conductor surrounding portion.

  Therefore, even if the conductor connection allowing portion is provided with the conductor surrounding portion, the visual inspection of the connection state in which the conductor tip portion is connected by the conductor connection allowing portion can be easily performed.

  In addition, as described above, by forming the conductor surrounding portion in the conductor connection allowance portion, the anticorrosion treatment is performed on the conductor connection portion between the conductor tip portion and the conductor connection allowance portion as in the past. It is not necessary to form the portion thick, and for example, by forming the portion thinly with a film or the like, it is possible to ensure the electrical corrosion resistance of the connecting portion.

  For this reason, since the connection terminal does not become bulky in the radially outward direction by the resin sealing the conductor connection portion, the resin layer is not destroyed by handling when the terminal is accommodated in the connector, and the connector is inserted. It can be securely and smoothly inserted into the hole. Further, when connecting the connection terminal to the counterpart terminal, it can be firmly and smoothly inserted into the insertion hole of the connector of the counterpart terminal.

  In addition, since the conductor connection portion between the conductor tip portion and the conductor connection allowance portion can be physically protected by providing the conductor surrounding portion, the connection at the conductor connection portion is released by an external force. The good connection state with respect to the external force of the said conductor connection part is securable.

  Here, the conductor surrounding portion is at least one of a surface (upper surface) on the side facing the conductor arrangement bottom, a surface on each side in the width direction, and a surface on each side in the insertion / removal direction to be inserted into and removed from the mating terminal. In addition, the conductor surrounding portion is not limited to being formed in a planar shape, and can be formed in a strip shape or a net shape, for example.

  The said anti-corrosion process part can be comprised by the structure sealed with resin, or what was formed with the oxide film or the plating film, for example. In particular, in the case of sealing with resin, the thickness of the resin is not particularly limited, but the viewpoint that the connection state between the conductor tip portion and the conductor connection allowable portion can be inspected by visual recognition as described above. It is preferable to form the conductor connection portion so thin that it can be visually confirmed.

Also, the wire tip, and the conductor tip, as well as composed and the insulating coating of the front end side of the insulating cover tip, the wire connection permitting portion, and the conductor connection permission unit, the insulating coating tip The wire tip and the wire connection allowance portion are compared with a configuration in which the conductor tip portion is simply connected to the conductor connection allowance portion by configuring with an insulation coating connection allowance portion that allows connection of the portion. Can be connected more firmly.

  Therefore, a firm connection state between the conductor connection allowing portion and the conductor tip portion can be obtained without connecting the conductor tip portion to the conductor connection allowing portion by pressure bonding.

Also, the insulating cover connection permission unit, comprising an insulating coating disposed bottom to place the insulating coating tip, with arranging the conductor tip to the conductor arrangement bottom, the insulating coating disposing said insulating coating tip in the state placed at the bottom, the conductor arrangement bottom, as compared with a case which is arranged at the same height as the insulating coating disposed bottom, a central axis of the conductor tip, and the center axis of the insulating coating tip by arranged in the bottom-up structure raised with respect to the insulating coating disposed bottom that spacing is height decreases, the said conductor tip the insulating coating tip while disposed on the insulating coating disposed bottom When connecting to the conductor placement bottom, when the conductor placement bottom and the insulation coating placement bottom are arranged at the same height, the distance between the center axis of the conductor tip and the center axis of the insulation coating tip In Wherein the central axis of the serial conductor tip can be reduced as compared with the distance between the center axis of the insulating coating tip.

Therefore, when the insulating coating tip is arranged on the insulating coating arrangement bottom , and the conductor tip is connected to the conductor arrangement bottom in a state where the conductor tip is arranged on the conductor arrangement bottom, the conductor The shear stress acting on the conductor tip can be reduced as the center axis of the tip and the center axis of the insulating coating tip are misaligned.

  Accordingly, since the central axis of the insulating coating tip does not greatly tilt with respect to the central axis of the conductor tip, the conductor tip can be firmly connected to the conductor connection allowable portion, and , It is possible to prevent a load from being applied to the conductor tip.

Also, the conductor arrangement bottom, and at least a portion of the conductor surrounding portion, by forming the through hole, even when the electrolyte has penetrated inside surrounded in the conductor surrounding portion, said through The electrolytic solution can be discharged to the outside of the conductor surrounding portion through the hole.

In particular, as described above, when the conductor surrounding portion is configured by the boundary wall surface portion and the side wall surface portion, the conductor surrounding portion is configured laterally with respect to the conductor tip portion. However, such a situation can be avoided by forming the through hole.
Therefore, it can prevent that the conductor connection part of the said electric wire front-end | tip part and the said conductor connection permission part is eroded.

Further, it said conductor arrangement bottom was raised, the bottom surface for connecting the bottom of said box portion, constituted by inclined surfaces, between the through-hole formed child on the inclined surface, the inclined surface was raised It can be set as the inclined surface inclined in the direction which descends with respect to the said conductor arrangement | positioning bottom part arrange | positioned by the bottom raising structure.

  Therefore, even when the electrolyte solution enters the inside of the conductor surrounding portion, the electrolyte solution can be concentrated on the inclined surface that descends with respect to the bottom of the conductor arrangement, and the penetration formed in the inclined surface The electrolyte can be efficiently discharged to the outside of the conductor surrounding portion through the hole.

As aspect of the invention, prior SL viewing allowable opening, the formed on opposite sides with respect to the conductor arrangement bottom in the conductor surrounding portion, the conductor surrounding portion, the wire connected to the mating terminal connection permission unit Boundary wall surface portion erected on the boundary portion with the allowable portion, and side wall surface portions erected on both sides in the width direction with respect to the serial arrangement direction in which the counterpart terminal connection allowable portion and the wire connection allowable portion are arranged in series it can be assumed to have been composed of a.

  Forming the visible permissible opening on the side of the conductor surrounding portion facing the conductor placement bottom to visually recognize the entire conductor tip located at the conductor placement bottom in a front view. Therefore, it is possible to confirm at a glance the connection state of the conductor tip with respect to the conductor arrangement bottom.

  Furthermore, since the conductor surrounding portion is composed of the boundary wall surface portion and the side wall surface portion, the entire side peripheral surface can be surrounded with respect to the conductor tip portion disposed at the conductor placement bottom portion. With respect to the tip portion, the conductor connecting portion between the conductor tip portion and the conductor connection allowing portion can be guided with respect to the electrolytic solution from the entire side peripheral surface, and excellent electric corrosion resistance can be ensured.

  When forming an anticorrosion treatment portion for preventing electrolytic corrosion of the conductor portion on at least a part of the conductor arrangement bottom and the conductor surrounding portion, the anticorrosion treatment portion is formed with a resin seal, and the conductor connection portion is made of resin. When sealing and forming, resin can be prevented from flowing out and diffusing to the outside of the conductor surrounding portion.

  Therefore, the connection terminal can efficiently seal the conductor connection part without being bulky by the anticorrosion treatment part formed on the connection terminal.

  In addition, since the resin supplied to the periphery of the conductor connection portion between the conductor connection permission portion and the conductor tip portion can be securely sealed by the conductor surrounding portion while being stored inside the conductor surrounding portion, Excellent anticorrosion properties can be formed.

Further, as an aspect of the present invention, the conductor is covered with an insulating coating, and the coated electric wire includes a wire tip portion on the tip side having a conductor tip portion from which the insulation coating on the tip side of the conductor is peeled off, and together are constituted by a connection terminal, the wire connecting portion connected to the wire tip to the wire connection permission unit, the conductor connecting portion connecting said conductor tip to the conductor connection allowing portion is provided, the conductor tip The part may be connected to the conductor arrangement bottom by welding.

  By welding the conductor tip to the conductor placement bottom, a firm connection can be achieved, and an excellent electrical connection between the conductor tip and the conductor placement bottom can be obtained.

  For example, by connecting the conductor tip to the conductor placement bottom by welding, unlike the case of connecting by crimping, the conductor tip can be kept exposed without being covered with a barrel piece or the like. Therefore, it becomes easy to visually recognize the conductor connecting portion between the conductor tip portion and the conductor connection allowing portion, and the connection state of the conductor connecting portion can be easily inspected.

The present invention comprises a conductor tip formed by coating a conductor with an insulation coating, and a conductor tip from which the insulation coating on the tip side of the conductor is removed, and an insulation coating tip on the tip side of the insulation coating. a covered electric wire having a distal end side, and the conductor tip of the wire connection permitting portion constituted by a conductor connection allowing portion which allows the connection the the insulating coating connection permission unit for permitting the connection of the insulating cover tip, connection structure and the mating terminal connection permission unit with Ru constructed are arranged in series, for connecting the connection terminals made of a metal nobler than metal constituting the conductor to permit connection between the connection mating terminal A method of manufacturing a body, the insulating coating connection allowing portion comprising an insulating coating arrangement bottom portion for arranging the insulating coating tip portion, the conductor connection allowing portion being a conductor arrangement bottom portion for arranging the conductor tip portion; and The bottom of the conductor arrangement Together comprise a conductor surrounding portion that surrounds the placed the conductor tip to the conductor surrounding portion, to form a viewing allowable opening is visibly open the inner conductor surrounding portion, the conductor arrangement bottom, and At least a portion of the conductor surrounding portion is formed with an anticorrosion treatment portion for preventing electrolytic corrosion of the conductor portion, and the bottom surface connecting the conductor arrangement bottom portion and the bottom surface of the mating terminal connection permission portion is an inclined surface. A through hole is formed in the inclined surface of the conductor surrounding portion, the insulating coating tip is disposed at the insulating coating placement bottom, and is disposed at the same height as the insulating coating placement bottom. in comparison, arranged with the central axis of the conductor tip, the conductor tip to the conductor arrangement bottom interval is disposed in raised so that the height decreases from the center axis of the insulating coating tip, The conductor tip portion is connected to the conductor placement bottom portion by pressure welding by the pressure welding means from at least one side of both sides of the conductor tip portion and the insulating coating placement bottom portion. Features.

  According to the method for manufacturing the electric wire with connection terminal, since the opening is formed on the opposite side of the conductor surrounding portion facing the conductor placement bottom, the conductor tip is connected to the conductor placement bottom. In this case, the conductor tip can be reliably heat-welded to the conductor placement bottom without causing the ultrasonic pressure member to interfere with the conductor surrounding portion.

In addition, as described above, the conductor arrangement bottom by arranging the bottom up to the raised structure against the insulating coating disposed bottom, the conductor said insulating coating tip while disposed on the insulating coating disposed bottom When connecting the tip to the conductor placement bottom, the distance between the center axis of the conductor tip and the center axis of the insulation coating tip is the same height between the conductor placement bottom and the insulation coating placement bottom. The distance between the central axis of the conductor tip and the central axis of the insulating coating tip can be reduced.

Therefore, when the insulating coating tip is arranged on the insulating coating arrangement bottom , and the conductor tip is connected to the conductor arrangement bottom in a state where the conductor tip is arranged on the conductor arrangement bottom, the conductor It is possible to reduce shear stress acting on the conductor tip as the center axis of the tip and the center axis of the insulating coating tip are displaced.

  Accordingly, since the central axis of the insulating coating tip does not greatly tilt with respect to the central axis of the conductor tip, the conductor tip can be firmly connected to the conductor connection allowable portion, and , It is possible to prevent a load from being applied to the conductor tip.

  According to the present invention, the anticorrosion treatment part such as resin is not bulky, the electrolytic corrosion occurring between different metals is suppressed, and the connection terminal having stable electrical characteristics over time, and the connection terminal and the electric wire are connected. A connection structure and a method for manufacturing the connection structure can be provided.

Structure explanatory drawing of the electric wire with a connection terminal of 1st Embodiment. Explanatory drawing of the manufacturing method of the electric wire with a connecting terminal of 1st Embodiment. Explanatory drawing of the manufacturing method of the electric wire with a connecting terminal of 1st Embodiment. Structure explanatory drawing of the electric wire with a connection terminal of 2nd Embodiment. Structure explanatory drawing of the electric wire with a connection terminal of 3rd Embodiment.

An embodiment of the present invention will be described below with reference to the drawings.
(First embodiment)
The electric wire 1 with a connection terminal in 1st Embodiment is comprised with the electric wire 100 and the connection terminal 10 crimp-connected to the front-end | tip part of this insulation coating 110, as shown in FIG.

  FIG. 1A is a longitudinal sectional view of a crimp terminal portion of the electric wire with connection terminal 1 of the present embodiment cut at an intermediate portion in the width direction Y. FIG. FIG.1 (b) is a top view which shows a part of crimp terminal part of the electric wire 1 with a connecting terminal of this embodiment, and FIG.1 (c) is the sectional view on the AA line of Fig.1 (a). .

  As shown in FIG. 1, the electric wire 100 has a conductor 101 composed of a plurality of aluminum strands 101 a (core wires) and an insulating resin in which the connection terminals 101 are formed of an insulating resin in accordance with the recent reduction in size and weight. It is configured by covering with a covering 110.

  The wire tip portion 100T provided on the tip side of the insulating coating 110 is composed of a conductor tip portion 101T from which the conductor 101 on the tip side of the insulating coating 110 has been peeled off and an insulating coating tip portion 110T on the tip side of the insulating coating 110. .

  The connection terminal 10 is a female terminal and is a metal that is nobler than the metal constituting the conductor 101. For example, a copper alloy strip is used as a metal substrate, and a metal substrate having a thickness of 0.25 mm and a width of 31 mm is subjected to bending processing. It is composed. As shown in FIGS. 1A and 1B, the connection terminal 10 includes a box portion 50 that allows insertion of male tabs of male terminals (not shown) from the front to the rear in the longitudinal direction D, and the first The transition portion 41 and the wire connection allowing portion 11 that allows the connection of the wire tip portion 100T are arranged in series in this order.

  The box part 50 is a female connection part composed of an inverted hollow quadrangular columnar body, and has a space 50 </ b> A that allows insertion of a male terminal male tab therein, and contacts the male terminal male tab inserted therein. A contact piece (not shown) is provided.

  The wire connection allowance portion 11 includes a conductor connection allowance portion 12 and an insulation barrel portion 21, and the conductor connection allowance portion 12 and the insulation barrel between the conductor connection allowance portion 12 and the insulation barrel portion 21. A second transition portion 16 that connects the portion 21 in series in the longitudinal direction D is disposed. The conductor connection allowing portion 12 includes a conductor arrangement bottom portion 13 and a conductor surrounding portion 14 protruding upward with respect to the conductor arrangement bottom portion 13.

  The insulation barrel portion 21 includes an insulation barrel bottom surface 22 on which the insulating coating tip portion 110T can be disposed, and an insulation barrel piece 23 (insulation barrel piece 23a, Insulation barrel piece 23b).

  The 1st transition part 41 is a connection part which connects the box part 50 and the electric wire connection permission part 11 in series in the longitudinal direction D, and is upwards from the width direction both sides of the 1st transition bottom face 41a and the 1st transition bottom face 41a. The first transition protrusion 41b protrudes.

The connection terminal 10 has the bottom surface of the conductor arrangement bottom portion 13 and the box portion 50 such that the conductor arrangement bottom portion 13 is raised to a predetermined height H with respect to the bottom surface 50a of the box portion 50 and the bottom surface 22 of the insulation barrel. The first transition bottom surface 41a is disposed between the first transition bottom surface 41a and the second transition portion 16 between the conductor disposed bottom portion 13 and the insulation barrel bottom surface 22.
Thereby, the 1st transition bottom face 41a, the conductor arrangement | positioning bottom part 13, and the 2nd transition part 16 are formed in the trapezoid shape by the side view, as shown to Fig.1 (a).

  The predetermined height H means that the conductor disposition bottom portion 13 is placed on the bottom surface of the insulation barrel in the state where the conductor front end portion 101T is disposed on the conductor disposition bottom portion 13 and the insulation coating front end portion 110T is disposed on the bottom surface 22 of the insulation barrel. 22, that is, when the conductor placement bottom 13 is not raised, the distance between the center axis X1 of the conductor tip 101T and the center axis X2 of the insulation coating tip 110T In comparison, the height is raised with respect to the bottom surface 22 of the insulation barrel so that the distance between the center axis X1 of the conductor tip 101T and the center axis X2 of the insulating coating tip 110T is reduced.

  Specifically, as shown in FIGS. 1A and 1C, the predetermined height H means that the conductor tip 101T is placed on the conductor placement bottom 13 and the insulation coating tip 110T is placed on the bottom of the insulation barrel. In the state where the conductor arrangement bottom portion 13 is disposed in the insulation barrel portion 21, the conductor arrangement bottom portion 13 is moved to a height at which the central axis X1 of the conductor tip portion 101T and the central axis X2 of the insulation coating tip portion 110T are substantially collinear. Is the height raised to the bottom.

  Further, the bottom-up structure in which the conductor arrangement bottom portion 13 is raised with respect to the bottom surface 50a of the box portion 50 and the bottom surface of the insulation barrel 22 will be described in detail. The first transition bottom surface 41a is arranged with the conductor arrangement from the bottom surface 50a of the box portion 50. It forms in the bottom part 13, ie, the inclined surface inclined linearly so that it may become high gradually to the predetermined | prescribed height as it progresses back in the longitudinal direction D.

  In addition, as shown in FIG.1 (b), while the box part 50 is formed in the width | variety which can insert the male terminal as a counterpart terminal, the electric wire connection permission part 11 is the magnitude | size which can arrange | position the electric wire front-end | tip part 100T. Now, the first transition portion 41 formed between the wire connection allowing portion 11 and the box portion 50 is formed with a small width with respect to the box portion 50. As the first transition portion 41 moves backward in the longitudinal direction D, the width gradually increases. It is small.

On the other hand, the bottom surface 16a of the second transition portion 16 gradually increases to the predetermined height H described above as it proceeds from the bottom surface 22 of the insulation barrel to the conductor placement bottom portion 13, that is, the tip end side D2 in the longitudinal direction D. It is formed of an inclined surface that is linearly inclined so as to be higher.
A side wall surface portion 14S described later of the conductor surrounding portion 14 is continuously formed in the longitudinal direction D until reaching a position corresponding to the second transition portion 16 as well as the conductor arrangement bottom portion 13. That is, the conductor surrounding part 14 is provided with a shape protruding upward on both sides in the width direction of the bottom surface 16a of the second transition part 16.

  Further, the conductor arrangement bottom portion 13 is formed by a flat portion 13a having a size capable of arranging the connection terminal 101 and an inclined bottom portion 13b inclined in a descending direction with respect to the flat portion 13a. Yes. As shown in FIGS. 1 (a) and 1 (b), the inclined bottom portion 13b is moved to the front end side in the longitudinal direction D with respect to the flat portion 13a in the conductor arrangement bottom portion 13, and the first bottom as it advances toward the front end side. It is a portion that is inclined and inclined in the direction of gradually descending at the same inclination angle as that of the transition bottom surface 41a.

The conductor surrounding portion 14 is formed by a boundary wall surface portion 14F and a side wall surface portion 14S.
The boundary wall surface portion 14F is configured to protrude upward from a boundary portion between the first transition bottom portion 41 and the wire connection allowing portion 11, specifically, a rear side portion in the longitudinal direction D of the first transition bottom surface 41a. The side wall surface portion 14S is configured to protrude upward from both sides in the width direction of the conductor arrangement bottom portion 13.

  A visual permissible opening 15 that opens in a direction facing the conductor arrangement bottom 13, that is, above the conductor arrangement bottom 13, so that the inside of the conductor enclosure 14 can be seen without forming the conductor enclosure 14. Is forming.

  Note that the portion between the conductor placement bottom 13 and the second transition bottom surface 16a is also opened without the conductor surrounding portion 14 so that the wire tip portion 100T can be placed.

  Further, by disposing the boundary wall surface portion 14F and the side wall surface portion 14S on the outer peripheral side of the conductor arrangement bottom portion 13 so as to surround the conductor arrangement bottom portion 13, the conductor wall surface portion 14F and the side wall surface portion 14S have conductors on the inner side. A storage space 13S capable of storing the distal end portion 101T is configured.

  The electric wire with connecting terminal 1 constitutes an electric wire connecting portion 11T in which the electric wire tip portion 100T is connected by crimping and welding to the electric wire connection allowing portion 11 in the connecting terminal 10 having the above-described configuration. The electric wire connection portion 11T includes an insulating coating connection portion 72 and a conductor connection portion 71 in order from the rear side in the longitudinal direction D to the distal end side.

  The insulation coating connection portion 72 is a crimped portion obtained by crimping the insulation coating tip portion 110T disposed on the barrel bottom 22 in the insulation barrel portion 23 with the insulation barrel pieces 23 (23a, 23b).

  The conductor connection portion 71 is a weld connection portion that is connected to each other by welding at the contact portion between the conductor tip portion 101T and the conductor placement bottom portion 13 in a state where the conductor tip portion 101T is placed on the conductor placement bottom portion 13.

Next, a method for manufacturing the above-described electric wire with connection terminal 1 will be described. The connection terminal manufacturing process for manufacturing the connection terminal 10 and the connection terminal connection process for connecting the connection terminal 10 to the electric wire 100 are divided into FIGS. 3 will be described.
2 is an explanatory diagram of the connection terminal manufacturing process, and FIG. 3 is an explanatory diagram of the connection terminal connection process.

  In the connection terminal manufacturing process, although not shown, first, a punched terminal material obtained by punching a sheet metal into a predetermined terminal development shape is manufactured, and the punched terminal material is press-molded so that the conductor placement bottom 13 becomes bulky as described above. And a bending process by press molding or the like around the axis centering on the axis along the longitudinal direction D to form a three-dimensional connection terminal 10S as shown in FIGS. 2 (a1) and (a2). Is forming.

Subsequently, the connection terminal 10T in which the plating portion 60 is formed is formed on the connection terminal 10S described above.
Specifically, as shown in FIGS. 2 (a1) and (a2) to FIG. 2 (b), the plating processing section includes a first transition bottom surface 41a, a conductor arrangement bottom portion 13 and an insulation barrel bottom surface in the connection terminal 10. 22 is formed with respect to the surface on the side where the electric wire tip portion 100T is arranged, but the plating processing portion 60 is a base metal rather than copper and has conductivity, for example, tin plating, nickel plating, or It may be formed by chromic acid plating or the like.

  In the first transition portion 41, the plating treatment portion 60 is formed on the first transition bottom surface 41a. However, the plating treatment portion 60 is formed as the boundary wall surface portion 14F by at least a process described later on the first transition bottom surface 41a. It is formed in the region to be formed.

  Subsequently, as shown in FIG. 2C, a connection terminal 10 </ b> U is formed in the inclined bottom portion 13 b of the conductor placement bottom 13, in which a through hole 61 penetrating the conductor placement bottom 13 in the vertical direction is formed.

Then, along the boundary portion of the region indicated by the phantom line in FIG. 2C, a notch communicating in the thickness direction is made, and the first transition bottom surface 41a and the conductor indicated by the broken line in FIG. The boundary portion with the arrangement bottom portion 13 is valley-folded as a crease, and the boundary wall surface portion 14Fa is raised at a right angle with respect to the flat portion 13a of the conductor arrangement bottom portion 13.
As a result, as shown in FIG. 2D, the boundary wall surface portion 14 </ b> F surrounding the conductor arrangement bottom portion 13 can be arranged at the boundary portion between the box portion 50 and the conductor arrangement bottom portion 13.

The connection terminal 10 can be comprised by the structure mentioned above.
In addition, the connection terminal 10 can be comprised not only with the manufacturing method mentioned above but with another manufacturing method.
For example, the connection terminal 10 is formed with a plating portion 60, a through hole 61, and a boundary wall surface portion 14F with respect to the connection terminal 10S bent into a three-dimensional shape as shown in FIGS. 2 (a1) and 2 (a2). However, the plated portion 60 or the through hole 61 is formed on the terminal material in a terminal development shape before the connection terminal 10 is bent into a three-dimensional shape, and then shown in FIGS. 2 (a1) and 2 (a2). You may bend into such a solid shape.

Then, the connection terminal connection process which connects the connection terminal 10 mentioned above to the electric wire front-end | tip part 100T as a manufacturing method of the electric wire 1 with a connection terminal is demonstrated using FIG.
As shown in FIG. 3A, the conductor tip portion 101T is arranged on the conductor arrangement bottom portion 13 and the insulating coating tip portion 110T in the wire tip portion 100T is arranged on the bottom surface 22 of the insulation barrel.
Then, using a crimping tool (clipper), as shown in FIG. 3B, the insulation coating tip 110 </ b> T is crimped and connected by the insulation barrel piece 23 to form the insulation coating connection portion 72. At this time, attention should be paid so that the arrangement angle of the insulating coating tip portion 110T arranged on the bottom surface 22 of the insulation barrel and the central axis X2 of the insulating coating 110 do not deviate from the longitudinal direction D of the connection terminal 10.

  Since the electric wire tip portion 100T and the connection terminal 10 can be firmly fixed by the above-described crimping, it is possible to prevent the arrangement position and the arrangement angle of the connection terminal 10 with respect to the electric wire tip portion 100T from being shifted.

  Finally, as shown in FIG. 3 (c), the conductor pressing bottom portion 90 and the conductor tip bottom portion 101T are ultrasonically welded by the ultrasonic pressure unit 90 to electrically connect the conductor tip tip portion 101T and the conductor tip bottom portion 13 to each other. Connect to.

  The ultrasonic pressure unit 90 provided in the ultrasonic welding apparatus includes a horn 91 (ultrasonic tool) and an anvil 92 (workbench) as shown in FIG. Oppositely arranged on each side separated.

  Note that the horn 91 and the anvil 92 both have knurlings 91a and 92a (uneven portions) for preventing slipping caused by ultrasonic vibration at the tip.

  Specifically, the conductor placement bottom 13 is fixed from below the conductor placement bottom 13 by the anvil 92. In this state, the conductor tip 101T is pressurized toward the conductor placement bottom 13 while lowering the horn 91 from above with respect to the conductor placement bottom 13.

  At this time, by ultrasonically vibrating the horn 91 to ultrasonically weld the conductor tip portion 101T and the conductor placement bottom portion 13, the conductor connection portion 71 in which the conductor placement bottom portion 13 and the conductor tip portion 101T are joined is formed. Can be configured.

  By the above, the electric wire 1 with a connecting terminal of 1st Embodiment can be manufactured, and this electric wire 1 with a connecting terminal can show the following effects.

  According to the configuration described above, the conductor surrounding portion 14 surrounds the conductor tip portion 101T, so that the conductor surrounding portion 14 electrolyzes the contact portion between the conductor tip portion 101T and the conductor placement bottom portion 13, that is, the conductor connection portion 71. It can guide so that liquid may not adhere.

  Thereby, compared with the case where the conductor surrounding portion 14 is not configured in the conductor connection allowing portion 12, the electrolyte solution can be made difficult to adhere to the conductor connecting portion 71, and therefore the conductor tip portion 101T and the conductor connection allowing portion can be prevented. It can suppress that the conductor connection part 71 with 12 erodes.

  Furthermore, as described above, the plating portion 60 is formed on the conductor arrangement bottom portion 13 and the conductor surrounding portion 14, so that it is possible to more reliably prevent the conductor connection portion 71 from being eroded.

  Thus, by forming the conductor surrounding portion 14 in the conductor connection allowing portion 12, it is possible to form the conductor only by forming the thin plating processing portion 60 on the conductor placement bottom portion 13 and at least a part of the surface of the conductor surrounding portion 14. It is possible to prevent electrolytic corrosion of the connecting portion 71.

  Therefore, since it is possible to prevent the electrolytic corrosion of the conductor portion without firmly sealing the conductor connection portion 71 with resin as in the conventional case, the resin material can be greatly reduced, and the corrosion resistance can be easily improved. it can.

  Further, since the conductor surrounding portion 14 is not formed on the side facing the conductor arrangement bottom portion 13, that is, the conductor permissible opening portion 15 is provided, the conductor tip portion 101 </ b> T is connected by the conductor connection allowing portion 12. Visual inspection of the state or inspection with a camera can be easily performed.

  Specifically, when performing the connecting step of connecting the conductor tip portion 101T and the conductor connection allowance portion 12, in the conductor connection portion 71 connecting the conductor tip portion 101T and the conductor connection allowance portion 12, the conductor tip portion 101T and the conductor Since the relative position and angle with respect to the connection allowable portion 12 may be shifted with respect to the desired position and angle, the connection state between the conductor tip portion 101T and the conductor connection allowable portion 12 after the connection step described above. It is necessary to perform quality inspection.

  However, in a series of processes conventionally performed to manufacture a conventional electric wire with connection terminals, the resin sealing process for sealing the conductor connection part with resin is a connection process for connecting the conductor tip part and the conductor connection allowable part. In many cases, this is performed continuously with the connecting step.

  For this reason, normally, even if it is going to perform the quality inspection of the connection terminal 10 in the final stage of a manufacturing process, the conductor connection part 71 will be sealed with resin and will be in the state which cannot be visually recognized. If it does so, the subject that the test | inspection of the connection state of the conductor front-end | tip part 101T and the conductor connection permission part 12 cannot be performed by visual observation or image | photographing with a camera occurred.

  On the other hand, as described above, the electric wire with connection terminal 1 of the present embodiment constitutes the conductor surrounding portion 14 in the conductor connection allowing portion 12, so that the conductor tip portion 101T and the conductor connection portion are connected in the conventional manner. Without covering the conductor connection portion 71 with the allowance portion 12 with a thick resin or the like, it is possible to ensure the electric corrosion resistance of the conductor connection portion 71 which is the connection portion.

  Therefore, even if the plating processing portion 60 is formed on the conductor arrangement bottom portion 13 and the conductor surrounding portion 14, the plating processing portion 60 conceals the conductor connection portion 71 in which the conductor tip portion 101T is connected by the conductor connection allowing portion 12. Since the surface shape of the conductor connecting portion 71 can be visually confirmed, the connection state between the conductor tip portion 101T and the conductor connection allowing portion 12 can be inspected using a camera or the like.

  Further, as described above, by forming the conductor surrounding portion 14 in the conductor connection allowing portion 12, the resin is applied to the conductor connecting portion 71 between the conductor tip portion 101T and the conductor connection allowing portion 12 as in the past. The connection terminal 10 is a resin that seals the conductor connection portion 71 because it is not necessary to form it thickly, for example, it is possible to ensure the electric corrosion resistance of the conductor connection portion 71 simply by forming it thinly with a film or the like. Does not bulge outward in the radial direction.

  Therefore, the resin layer is not destroyed by handling when accommodating the terminals in the connector, and can be securely and smoothly inserted into the terminal insertion insertion hole of the connector, When connecting to the mating terminal, the mating terminal can be securely and smoothly inserted into the insertion hole of the connector of the mating terminal.

  In addition, since the conductor surrounding portion 14 is configured in the conductor connection allowing portion 12, the conductor connecting portion 71 can be protected from an external force, and therefore the conductor tip portion 101 </ b> T with respect to the conductor connection allowing portion 12 can be protected by the external force. The connection is not released, and a good connection state of the conductor connection portion 71 can be ensured.

In particular, the electric wire 1 with connection terminal according to the present embodiment is visually recognized by forming the visual permissible opening 15 in the connection terminal 10 in a direction facing the conductor arrangement bottom 13, that is, upward with respect to the conductor arrangement bottom 13. The entire conductor tip portion 101T arranged on the conductor arrangement bottom portion 13 can be viewed through the allowable opening 15 in a plan view.
Therefore, the connection state of the conductor tip portion 101T with respect to the conductor arrangement bottom portion 13 can be confirmed at a glance.

  Furthermore, by configuring the conductor surrounding portion 14 with the boundary wall surface portion 14F and the side wall surface portion 14S, the entire side peripheral surface with respect to the conductor tip portion 101T disposed on the conductor placement bottom portion 13, that is, the circumferential direction excluding the upper side. The whole can be surrounded. For this reason, the conductor surrounding portion 14 can firmly guide the conductor connection portion 71, which is a connection portion between the conductor tip portion 101 </ b> T and the conductor connection allowing portion 12, with respect to the electrolyte solution, with respect to the electrolyte solution. Electric corrosion resistance can be ensured.

  Moreover, in addition to connecting the conductor tip portion 101T to the conductor connection permission portion 12 by welding, the electric wire 1 with connection terminal of the present embodiment is connected by crimping the insulation coating tip portion 110T to the insulation coating connection permission portion. Compared to a configuration in which the conductor tip 101T is simply connected to the conductor connection allowance 12 by welding, a more firm connection state between the wire tip 100T and the wire connection allowance 11 can be obtained.

  Therefore, an excellent electrical connection state between the conductor connection allowing portion 12 and the conductor tip portion 101T can be obtained without connecting the conductor tip portion 101T to the conductor connection allowing portion 12 by pressure bonding.

Furthermore, the electric wire 1 with connection terminal of the present embodiment has a bottom-up structure in which the conductor placement bottom portion 13 in the connection terminal 10 is raised with respect to the bottom surface 22 of the insulation barrel and the bottom surface 50a of the box portion 50 as described above. It is arranged. For this reason, when connecting the conductor tip 101T to the conductor placement bottom 13 with the insulation coating tip 110T arranged on the insulation barrel bottom surface 22, the central axis X1 of the conductor tip 101T and the insulation coating tip 110T The conductor tip portion 101T and the insulating coating tip portion 110T are arranged with respect to each of the conductor arrangement bottom portion 13 and the insulation barrel bottom surface 22 arranged at the same height with respect to the center axis X2 (shortest distance). It can be made smaller than the case.
That is, in the state where the insulating coating tip portion 110T is arranged on the bottom surface 22 of the insulation barrel and the conductor tip portion 101T is arranged on the conductor arrangement bottom portion 13, the center axis X1 of the conductor tip portion 101T and the center of the insulating coating tip portion 110T are arranged. Deviation from the axis X2 can be kept to a minimum, and they can be aligned on substantially the same axis.

  Therefore, when the insulating coating tip portion 110T is arranged on the bottom surface 22 of the insulation barrel and the conductor tip portion 101T is ultrasonically welded to the conductor placement bottom portion 13 with the conductor tip portion 101T arranged on the conductor placement bottom portion 13, As the horn 91 in the ultrasonic pressure unit 90 is pressurized against the conductor tip 101T from above the conductor tip 101T, the center axis X1 of the conductor tip 101T and the center axis of the insulation coating tip 110T. The deviation from X2 can prevent an excessive shear stress from acting on the conductor tip 101T.

  Accordingly, the central axis of the insulating coating front end portion 110T is not greatly inclined with respect to the central axis of the conductor front end portion 101T, and the conductor front end portion 101T is placed on the conductor connection allowing portion 12 without applying an excessive load to the conductor front end portion 101T. It can be connected firmly.

Furthermore, since the electric wire 1 with a connection terminal of the present embodiment forms the visual recognition opening 15 in the connection terminal 10 in a direction facing the conductor arrangement bottom 13, that is, above the conductor arrangement bottom 13, The horn 91 in the ultrasonic pressure unit 90 can be lowered from above the conductor tip 101T toward the conductor tip 101T without interfering with the conductor surrounding part 14.
Therefore, it is possible to smoothly ultrasonically weld the conductor tip 101T and the conductor placement bottom 13 using the ultrasonic welding apparatus.

  Further, by connecting the conductor tip 101T to the conductor placement bottom 13 by welding, the conductor tip 101T can be firmly connected, and an excellent electrical connection state between the conductor tip 101T and the conductor placement bottom 13 can be obtained. Can do.

  Moreover, by connecting the conductor tip 101T to the conductor placement bottom 13 by welding, for example, unlike the case of connecting by crimping, it is possible to ensure that the conductor tip 101T is exposed without being covered with a barrel piece or the like. Therefore, it becomes easy to visually recognize the conductor connection portion 71 between the conductor tip portion 101T and the conductor connection allowing portion 12, and the connection state of the conductor connection portion 71 can be easily inspected.

  In addition, by forming the through hole 61 in the conductor placement bottom portion 13, even when the electrolytic solution enters the inside surrounded by the conductor surrounding portion 14, the electrolytic solution is supplied to the conductor surrounding portion 14 through the through hole 61. Can be discharged to the outside.

In particular, as described above, the through hole 61 is formed as the inclined bottom portion 13b in the conductor arrangement bottom portion 13 so that the electrolyte solution can be disposed even when the electrolyte solution enters the inside of the conductor surrounding portion 14. The inclined bottom portion 13b descending with respect to the bottom portion 13 can be collected.
Therefore, the electrolytic solution can be efficiently discharged to the outside of the conductor surrounding portion 14 through the through hole 61 formed in the inclined bottom portion 13b.

Then, the electric wires 1A and 1B with connection terminals in other embodiments will be described.
However, among the configurations of the electric wires with connection terminals 1A and 1B described below, the same components as those of the electric wire with connection terminals 1 in the first embodiment described above are denoted by the same reference numerals and the description thereof is omitted. .

(Second Embodiment)
The structure of 1 A of electric wires with a connection terminal in 2nd Embodiment is demonstrated using Fig.4 (a), (b).
4A is a plan view showing a part of the crimp terminal portion of the electric wire with connection terminal 1A of the second embodiment, and FIG. 4B is the embodiment cut at an intermediate portion in the width direction Y. FIG. It is a longitudinal cross-sectional view of the crimp terminal part of 1 A of electric wires with a connecting terminal of a form.

1 A of electric wires with a connection terminal form the resin coating layer 65 (resin coat layer), without forming the plating process part 60 in the conductor connection permission part 12. FIG.
Specifically, the resin coating layer 65 can prevent the electrolytic corrosion of the connection terminal 10, but is formed of a resin material having an insulating property unlike the plating processing portion 60 having conductivity. ), At least the conductor connection portion 71 in the conductor connection permission portion 12, that is, the portion excluding the contact portion between the conductor tip portion 101T and the conductor arrangement bottom portion 13 is formed.

  More specifically, as shown in the X partial enlarged view of FIG. 4B, in order to further improve the corrosion resistance, even the contact portion between the conductor tip portion 101T and the conductor placement bottom portion 13 A resin coating layer 65 is formed at the outer peripheral edge 66, in other words, at the interface portion 66 between the contact portion and the non-contact portion in the conductor arrangement bottom portion 13.

  As described above, excellent corrosion resistance can be obtained by forming the insulating resin coating layer 65 on the surfaces of the conductor placement bottom 13 and the conductor surrounding portion 14.

  Furthermore, since the conductor connecting portion 71 is surrounded by the conductor surrounding portion 14 only by forming the resin coating layer 65 in the form of a film on the surface of the conductor placement bottom portion 13 and the conductor surrounding portion 14, it is excellent. Corrosion resistance can be obtained.

(Third embodiment)
The structure of the electric wire 1B with a connection terminal in 3rd Embodiment is demonstrated using FIG.
FIG. 5 is a longitudinal sectional view of a crimp terminal portion of the electric wire with connection terminal 1B of the third embodiment cut at an intermediate portion in the width direction Y.

  As shown in FIG. 5, the electric wire 1B with connection terminal in the third embodiment has a resin sealing for sealing the conductor surrounding portion 14 and the conductor placement bottom portion 13 and the conductor tip portion 101T surrounded by the insulating coating tip portion 110T. A stop 80 is formed.

  Thus, since the resin sealing portion 80 can firmly seal the entire conductor tip 101T in addition to the conductor placement bottom 13 and the conductor surrounding portion 14, an excellent anticorrosion effect can be obtained.

  Even when a resin material is injected into the storage space 13S when the resin sealing portion 80 described above is formed, the conductor surrounding portion 14 prevents the resin material from flowing out and diffusing outside the conductor surrounding portion 14. Can do.

  Furthermore, the resin supplied to the periphery of the conductor connecting portion 71 between the conductor connection allowing portion 12 and the conductor tip portion 101T can be stored inside the conductor surrounding portion 14 by the conductor surrounding portion 14. Therefore, even with a small amount of resin, the conductor connection portion 71 can be sealed reliably and efficiently in addition to the conductor placement bottom portion 13 and the conductor surrounding portion 14.

  Therefore, the connection terminal 10 can form excellent corrosion resistance without being bulky by the resin material provided in the connection terminal 10.

The connection terminal structure of the present invention corresponds to the electric wire 1 with a connection terminal of this embodiment, and similarly,
The insulation coating connection permission portion corresponds to the insulation barrel portion 21,
The bottom of the insulation coating arrangement corresponds to the bottom 22 of the insulation barrel,
The bottom surface connecting the raised bottom portion of the conductor arrangement and the bottom surface of the counterpart terminal connection permission portion corresponds to the inclined bottom portion 13b,
The counterpart terminal connection permission portion corresponds to the box portion 50,
The anticorrosion treatment portion corresponds to the plating treatment portion 60, the resin coating layer 65, or the resin sealing portion 80,
The pressure welding means corresponds to the ultrasonic pressure unit 90,
The opening corresponds to the visually permissible opening 15,
The connection partner terminal corresponds to the male terminal,
Although the series arrangement direction corresponds to the longitudinal direction D, the present invention is not limited to the above-described embodiment, and can be formed in various other embodiments.

The conductor arrangement bottom portion 13 is configured to be raised to the predetermined height H described above with respect to the insulation barrel bottom surface 22 (see FIG. 1), but is not limited to this configuration.
For example, in the configuration in which the distance between the center axis X1 of the conductor tip 101T and the center axis X2 of the insulation coating tip 110T is the same height without being raised relative to the bottom surface 22 of the insulation barrel, the conductor arrangement The conductor tip 101T is disposed on the bottom 13 and the insulation coating tip 110T is disposed on the bottom surface 22 of the insulation barrel, and the center axis X1 of the conductor tip 101T and the center axis X2 of the insulation coating tip 110T As long as the conductor arrangement bottom portion 13 is raised with respect to the bottom surface 22 of the insulation barrel to a height that is smaller than the interval, the height is not limited to the predetermined height H, and is raised to various heights. Also good.
As described above, the present invention is not limited to the above-described embodiment, and can be configured in various embodiments.

DESCRIPTION OF SYMBOLS 1,1A, 1B ... Electric wire with a connection terminal 10, 10A, 10B ... Connection terminal 11 ... Electric wire connection allowable part 11T ... Electric wire connection part 12 ... Conductor connection allowable part 13 ... Conductor arrangement bottom part 14 ... Conductor surrounding part 14F ... Boundary wall surface part 14S ... Side wall surface part 15 ... Visual permissible opening part 50 ... Box part 60 ... Plating process part 65 ... Resin coating layer 80 ... Resin sealing part 21 ... Insulation barrel part 41a ... First transition slope 61 ... Through-hole 71 ... Conductor connection Part 90 ... Ultrasonic pressure part 100 ... Wire 100T ... Wire tip 101 ... Conductor 101T ... Conductor tip 110 ... Insulation coating 110T ... Insulation coating tip X1 ... Central axis of conductor tip X2 ... Center of insulation coating tip Axis D ... longitudinal direction

Claims (4)

In the distal end side of the wire, the conductor to permit connection of the conductor tip of configured wire tip at the front end side of the insulating coating end portion of the insulating coating and the conductor tip insulating coating has been removed to cover the conductive A wire connection allowance portion configured with a connection allowance portion and an insulation coating connection allowance portion allowing connection of the tip end portion of the insulation cover and a counterpart terminal connection allowance portion permitting connection with a connection counterpart terminal in series. disposed are configured Rutotomoni, a configured connection terminals nobler metal than the metal constituting the conductor,
The conductor connection permitting portion comprises a conductor disposed bottom to place the conductor tip be constituted by a conductor surrounding portion surrounding said conductor tip disposed in the conductor arrangement bottom, the conductor surrounding portion, the viewing allowable opening which is open to allow viewing the inside of the conductor surrounding portion is formed,
At least a part of the conductor placement bottom and the conductor surrounding part is formed with an anticorrosion treatment part for preventing electric corrosion of the conductor part ,
The insulating coating connection allowing portion is provided with an insulating coating arrangement bottom portion for arranging the insulating coating tip.
While arranging the conductor tip at the conductor placement bottom, and in the state where the insulation coating tip is placed at the insulation coating placement bottom, compared to the case where the conductor coating is placed at the same height as the insulation coating placement bottom, It is arranged in a raised structure in which the conductor arrangement bottom is raised with respect to the insulation coating arrangement bottom so that the distance between the center axis of the conductor tip and the center axis of the insulation coating tip is small,
A bottom surface connecting the raised bottom portion of the conductor arrangement and a bottom surface of the counterpart terminal connection permission portion is formed of an inclined surface, and a through hole is formed in the inclined surface of the conductor surrounding portion. Connecting terminal. Before SL viewing allowable opening is formed on a side opposite to the conductor disposed bottom of the conductor surrounding portion,
The conductor surrounding portion is
A boundary wall surface portion erected at a boundary portion between the counterpart terminal connection permission portion and the wire connection permission portion;
The connection terminal according to claim 1, comprising a side wall surface portion erected on both sides in the width direction with respect to a series arrangement direction in which the counterpart terminal connection permission portion and the wire connection permission portion are arranged in series. A conductor covered with an insulation coating, and a covered electric wire provided with a wire tip on the tip side having a conductor tip from which the insulation coating on the tip side of the conductor is peeled off; and
It is comprised with the connection terminal of Claim 1 or 2 ,
The wire connecting portion connected to the wire tip to the wire connection permission unit, the conductor connecting portion connecting said conductor tip to the conductor connection allowing portion is provided,
A connection structure in which the conductor tip is connected to the conductor arrangement bottom by welding. The conductor is covered with an insulating coating, and the tip of the conductor is the tip of the conductor from which the insulating coating is removed, and the tip of the electric wire is the tip of the insulating coating on the leading end of the insulating coating. A covered electric wire provided;
Allowing the wire connection permission unit configured with an insulating coating connection permission unit which permits the connection of conductor connection permission unit and the insulating cover tip to permit connection of the conductor tip, the connection between the connection mating terminal together and the mating terminal connection permission unit Ru is configured by disposing in series, a manufacturing method of the connection structure for connecting the connection terminals made of a metal nobler than metal constituting the conductor,
The insulating coating connection allowing portion includes an insulating coating arrangement bottom portion for arranging the insulating coating tip portion,
The conductor connection allowing portion is constituted by a conductor arrangement bottom portion for arranging the conductor tip portion and a conductor surrounding portion for surrounding the conductor tip portion arranged at the conductor arrangement bottom portion,
Formed in the conductor surrounding portion is a visually permissible opening that allows the inside of the conductor surrounding portion to be visible,
Forming an anticorrosion treatment portion for preventing electric corrosion of the conductor portion on at least a part of the conductor arrangement bottom portion and the conductor surrounding portion,
The bottom surface that connects between the conductor placement bottom and the bottom surface of the counterpart terminal connection permission portion is configured with an inclined surface, and a through hole is provided in the inclined surface of the conductor surrounding portion,
While placing the insulating coating tip at the insulating coating placement bottom,
Compared with the case where the insulating coating is disposed at the same bottom as the bottom, the conductor is arranged so that the distance between the central axis of the conductor tip and the central axis of the insulating coating tip is small. Placing the conductor tip on the conductor placement bottom provided,
A connection structure for connecting the conductor tip to the conductor placement bottom by pressure welding by the pressure welding means from at least one of both sides of the conductor tip and the insulating coating placement bottom. Body manufacturing method.

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