JP3523065B2 - Connection structure and connection method between wire and terminal, and terminal - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for connecting an electric wire and a terminal by ultrasonic vibration, a connecting method, and a terminal used for these.

[0002]

2. Description of the Related Art FIGS.
The connection structure is based on the conventional ultrasonic vibration described in Japanese Patent Publication No. 42-42.

The connection structure shown in FIGS. 15 and 16 uses a pair of resin chips 2 in which a brazing material 1 such as solder is embedded or attached, and a coated wire 5 in which a core wire 3 is covered by a covering portion 4 is used. Connections are made by crossing. That is, as shown in FIG. 15, the intersecting portion of the covered electric wire 5 is sandwiched by a pair of resin chips 2 from above and below, and a horn (not shown) is brought into contact with the resin chips 2 to apply pressure. By applying ultrasonic vibration from the horn under this pressure,
As shown in FIG. 16, the resin chip 2 is melted and the chip 2 is welded, and the coating portion 4 of the coated electric wire 5 is melted and removed to expose the core wire 3. At the same time, the brazing material 1 is melted by the heat when the chip 2 is melted, and the exposed core wire 3 is brazed.

The connection structure shown in FIGS. 17 and 18 is based on the brazing material 1.
The resin chip 6 embedded in the surface so as to expose is used. The resin chip 6 is brought into contact so that the brazing material 1 comes into contact with the intersecting portion of the covered electric wire 5, and the resin chip 6 is superposed from the horn. Similarly, the resin chips 6 are melted and the covering portion 4 is melted and removed by applying sonic vibration, and the intersecting core wires 3 are brazed by the brazing material 1.

The connection structure of FIG. 19 connects the terminal fitting 7 and the covered electric wire 5, and one of the resin chips 8 to which the brazing material 1 is attached is placed on the anvil 9 and is placed on the anvil 9. The terminal fitting 7 and the covered electric wire 5 are placed in contact with each other. Then, the other resin chip 8 is brought into contact with the covered electric wire 5 and ultrasonically vibrated from the horn 10 to melt and remove the covering portion 4, and at the same time, the resin chip 8 is removed.
And the brazing filler metal 1 are melted at the same time to connect the core wire 3 and the terminal fitting 7.

[0006]

However, as shown in FIG.
Also, in the connection structure of FIG. 16, since the resin of the coating portion 4 and the resin chip 2 is present between the intersecting core wires 3, even if the brazing material 1 is melted at the same time as melting the resin, the melted brazing material is obstructed by the resin. As a result, the core wire cannot be satisfactorily contacted, and the reliability of the connection is reduced.

Further, in the connection structure shown in FIGS. 17 to 19, the molten brazing filler metal 1 cannot be discharged to the outside of the connection portion together with the molten melt of the coating portion 4 of the coated electric wire 5 and contact the core wire. Similarly, the reliability of the connection is reduced.

Therefore, the present invention provides a connection structure between an electric wire and a terminal, which can improve reliability of connection, and a connection method, and a terminal used for these, by providing a structure in which a brazing material can surely contact. The purpose is to provide.

[0009]

In order to achieve the above object, the connection structure of the invention of claim 1 is partitioned by a partition wall.
A first resin member into which the terminal is inserted in the groove, and the first resin member
Inserted in the groove of the resin member of the
There is a protrusion that the covered electric wire that covers the wire with the covering part is sandwiched.
And a second resin member that
Exciting ultrasonic waves in the state of being superposed with the resin member of 2.
Melts and removes the coating part of the coated electric wire by
It has a connection structure of an electric wire for connecting to the terminal and the terminal.
The conductive filter on the contact part between the terminal and the covered wire.
The partition wall and the projection, which are joined with the filler and partition the groove.
And the molten portion of the coating is filled between the
In the middle part of the protrusion along the axial direction
It is characterized in that a notch for escape is formed .

In this connection structure, the brazing material of the terminal comes into contact with the covered electric wire by stacking the covered electric wire and the terminal. When ultrasonically vibrating in this state to melt and remove the coating part, the brazing material and the core wire inside the coating part contact at the same time,
For example, since the brazing material is softened or melted by heat generated by ultrasonic vibration, the core wire bites into the brazing material, and the core wire and the terminal are electrically connected through the brazing material. Therefore, since the brazing material surely contacts the core wire, the reliability of the connection is improved.

The connection structure of the invention of claim 2 is the same as that of claim 1.
A connecting structure for connecting an electric wire and a terminal, wherein the terminal is a bottom plate.
And a pair of side plates standing in the same direction from both sides of this bottom plate
And the contact of the U-shaped cross section where the part facing the bottom plate is open.
The side plate is formed with a through window that connects the inside and the outside.
Is accommodated and fixed in the groove portion of the first resin member,
At least the side plate is covered by the ultrasonic vibration.
It is characterized in that it penetrates into the through window part .

In this connection structure, when the terminal and the covered electric wire are sandwiched by the resin parts, the brazing material of the terminal comes into contact with the covered electric wire, and in this state, ultrasonic vibration is applied to melt and remove the covering portion. And the core wire inside the covering portion come into contact with each other.

According to a third aspect of the present invention, in a connecting method, a terminal having a surface to which a conductive brazing material is joined is housed in a groove portion of a first resin component , and a core wire is covered with a resin covering portion. After contacting the brazing filler metal with the brazing filler metal,
Insert it into the groove and apply pressure to the covered wire and terminal while
Before melting and removing the coating by sonication
While filling the space between the inner wall of the groove and the protrusion,
It is characterized in that the brazing filler metal is released into the notch formed in the middle portion of the protrusion to bring the brazing material into at least a softened state and contact the core wire.

In this connection method, the terminal is housed in the groove of the resin component and the covered electric wire is brought into contact with this terminal, whereby the terminal, the brazing material and the covered electric wire come into contact with each other. Then, by applying ultrasonic vibration while applying pressure, the covering portion of the covered electric wire is melted and removed, and the core wire inside the covering portion comes into contact with the brazing material. Further, the brazing material is softened or melted and comes into contact with the core wire, so that the core wire and the terminal are electrically connected via the brazing material. Therefore, the brazing material and the core wire can be reliably brought into contact with each other.

[0015]

[0016]

[0017]

[0018]

[0019]

[0020]

According to a fourth aspect of the invention , the core wire is made of a resin covering portion.
The coated electric wire that has been coated contacts the groove of the first resin member.
The protrusion of the second resin member inserted in the groove.
The coated part is melted by ultrasonic vibration while it is embedded
A terminal which is removed and has electrical continuity with the core wire, the covered electric wire
A conductive brazing material is joined to the contact area with the
In the molten coating portion filled between the inner wall and the protrusion
The core wire is further pressed down.

In this terminal, by providing the brazing material, the brazing material comes into contact with the covered electric wire, and the contact with the core wire in the covered electric wire can be surely performed.

According to a fifth aspect of the present invention, there is provided a terminal according to the fourth aspect.
There is a bottom plate and both sides of this bottom plate stand in the same direction.
With a pair of side plates, a part whose side facing the bottom plate is open.
It has a connecting portion with a V-shaped cross section, and a through-hole that communicates the inside and outside
A through-hole is formed to allow the connector to fit in the groove of the housing.
There is a small amount of coating that is fixed and fixed and melted by ultrasonic vibration.
It is characterized in that it goes into at least the through window of the side plate .

In this terminal, the covering portion melted by ultrasonic vibration enters the through-hole of the side plate to increase the holding force in the direction in which the covered electric wire is pulled out from the terminal, and the terminal is firmly attached to the end of the covered electric wire. Can be fixed to.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

[First Embodiment] FIG. 1 is an exploded perspective view of an entire first embodiment of the present invention, and FIGS. 2 to 4 are sectional views showing a connecting procedure. In this embodiment, as shown in FIG. 1, a first resin member 11, a second resin member 12, and a terminal 13 made of a conductive metal are provided.

In this embodiment, the present invention is applied to a connector, in which the first resin member 11 is a connector housing and the second resin member 12 is a cover.

The connector housing 11 has a hood portion 14 connected to a mating connector (not shown) by fitting.
And an electric wire lead-out portion 15 integrally connected to one side of the hood portion 14.

In the wire lead-out portion 15, the bottom wall portion 16 extends from the hood portion 14, and a plurality of partition wall portions 17 are projected in parallel on the upper surface of the bottom wall portion 16 so that the partition wall portion 17 has the same shape. The enclosed portion is the groove portion 18. The groove 18 has a rectangular cross section with an open upper surface, and the terminal 13 is housed in each groove 18 to be connected to the covered electric wire 19. In addition, the partition wall portion 17 in the bottom wall portion 16
The outer portion is a welding portion 20 to which the cover 12 is welded.

The cover 12 includes a closing plate portion 21 that covers the wire lead-out portion 15, and the wire lead-out portion 15 in the closing plate portion 21.
And a plurality of protrusions 22 formed on the surface facing each other and a side wall portion 23 provided outside the protrusions 22.

The protrusion 22 has a rectangular cross section similar to that of the groove portion 18 of the wire lead-out portion 15, and is formed at a portion facing the groove portion 18. The protrusion 22 is formed to have a size slightly smaller than that of the groove portion 18, and is inserted into the corresponding groove portion 18 when the cover 12 is put on the wire lead-out portion 15. By this insertion, the protrusion 22 contacts the covered electric wire 19 introduced into the groove portion 18 and presses the covered electric wire 19 against the terminal 13.

In this embodiment, each protrusion 2
2 is an intermittent shape having a cutout portion 24 in the middle portion. Therefore, the protrusion 22 does not contact the covered electric wire 19 in the groove portion 18 over the entire length, and the cutout portion 24 does not contact the covered electric wire 19. By forming the cutout portion 24 that does not come into contact with the covered electric wire 19 in this manner, the cover portion melted by ultrasonic vibration can be released to the cutout portion 24.

The side wall portion 23 of the cover 12 is connected to the electric wire lead-out portion 1
5 is opposed to the welded portion 20 and is brought into contact with the welded portion 20 by covering the wire lead-out portion 15 with the cover 12. The tip end of the side wall portion 23 is a sharp welding portion 25, which is welded to the welding portion 20 of the wire lead-out portion 15 by ultrasonic vibration.

The connector housing 11 and the cover 12 are made of acrylic resin, ABS (acrylonitrile-
Butadiene-styrene copolymer) type resin, PC (polycarbonate) type resin, PVC (polyvinyl chloride) type resin, olefin type resin such as polyethylene and polypropylene, PEI (polyetherimide) type resin, PBT (polybutylene terephthalate). A resin, an ABS / vinyl chloride alloy, an acrylic / vinyl chloride alloy, a polyester elastomer, or a block copolymer of PBT and a polyether can be used.

In the covered electric wire 19, as shown in FIG. 2, a plurality of core wires 26 are covered with an insulating resin such as vinyl chloride.
7 is covered.

The terminal 13 is formed in a flat plate shape and is introduced into the groove portion 18 of the connector housing 11. Terminal 1
3 penetrates into the hood portion 14 of the connector housing 11, and the penetrating end contacts the terminal of the mating connector fitted in the hood portion 14 to be electrically connected. This terminal 13
It is connected by conducting with the core wire 26 of the covered electric wire 19.

The covered electric wire 19 in such a terminal 13
A conductive brazing filler metal 28 is bonded to the contact portion with, that is, the surface 13a. The brazing material 28 is made of solder, and is connected to the surface 13 a of the terminal 13 prior to the connection with the core wire 26.
To be joined to. In this connection, the molten brazing material 28 is used for the terminal 1
It can be easily performed by dropping or coating on the surface 13a of No. 3 and then cooling. As the brazing material 28, in addition to the solder described above, a brazing material having conductivity that can be melted at the heat generation temperature of the covering portion by isosonic vibration can be used.

The brazing material 28 is bonded to the surface 13 of the terminal 13.
Although it may be performed on the entire surface of a, as shown in FIG.
By performing only on the portion of the cover 12 corresponding to the protrusion 22, the amount of the brazing filler metal 28 is reduced, which is economical and the joining operation can be easily performed.

Next, the assembling procedure of this embodiment will be described.

As shown in FIG. 1, the terminal 13 to which the brazing material 28 is preliminarily joined is connected to the groove portion 18 of the connector housing 11.
Of the hood portion 1 by introducing the tip portion of the terminal 13 into each of the
Penetrate into 4 Then, the covered electric wire 1 is provided on each terminal 13.
9 is placed and overlapped, and the cover 12 is covered on the electric wire lead-out portion 15. At this time, as shown in FIG.
Is inserted into the groove portion 18 in alignment with the groove portion 18, and the covered electric wire 19 and the terminal 13 are sandwiched between the connector housing 11 and the cover 12.

In this state, a horn (not shown) is brought into contact with the cover 12 to apply ultrasonic vibration while applying pressure. The vibrated ultrasonic wave vibrates in the vertical direction, which is the same direction as the pressing direction of the horn. This ultrasonic wave is transmitted to the covered electric wire via the projection 22, the covering portion 27 of the covered electric wire 19 generates heat, and the covering portion 27 is melted and removed as shown in FIG.

By melting and removing the coating portion 27, the core wire 26 is removed.
Contacts the brazing material 28 on the terminal 13. At the same time, the protrusion 22 descends because it is pressed by the horn,
The protrusion 22 itself starts melting.

The brazing filler metal 28 absorbs the heat generated when the covering portion 27 is melted and the heat generated when the protrusion 22 is melted, and the absorption causes the brazing filler metal 28 to be softened or melted. When the brazing material 28 is softened or melted, the core wire 26 becomes
As shown in FIG. 4, the core wire 26 and the brazing filler metal 28
Can be contacted with a large contact area. By the contact between the brazing material 28 and the core wire 26, the core wire 26 and the terminal 1
3 and 3 are conducted and connected.

In such a connection structure, the molten resin does not hinder the contact between the brazing material 28 and the core wire 26, and the brazing material 28 is not discharged to the outside. For this reason, the brazing filler metal 28 and the core wire 26 can be reliably brought into contact with each other, and a highly reliable connection can be performed. Further, since the core wire 26 bites into and contacts the brazing material 28, and the melted brazing material 28 adheres to the periphery of the core wire 26, the brazing material 28 and the core wire 26
The contact area with and the contact resistance can be reduced, and the core wire 26 and the terminal 13 can be stably connected.

Further, the coating portion 2 melted by ultrasonic vibration
7 is a groove portion 18 as indicated by reference numeral 29 in FIGS. 2 and 3.
And the protrusion 22 are filled. Due to this filling, the molten portion 29 holds the terminal 13 and the core wire 26 in a stationary state. Therefore, the terminal 13 and the core wire 26 are not separated from each other, and the connection state is reliable.

The connector housing 11 and the cover 1
The welding with the welding member 2 is performed by bringing the welded portions 20 and 25 into contact with each other and applying ultrasonic vibration while applying pressure to weld them. In this case, the melted portion 29 of the covering portion 27 fills the gap between the inner surface of the groove portion 18 and the outer surface of the projection 22, and the filled melted portion 29 acts to join the connector housing 11 and the cover 12. Therefore, the joining force is increased. Therefore, the state in which the protrusion 22 presses the core wire 26 against the terminal 13 can be maintained, and the reliable connection state can be continued.

[Second Embodiment] Next, a second embodiment shown in FIGS. 5 to 14 will be described.

In this embodiment, as shown in FIG.
When the terminal 33 is housed in the groove 38 of the connector housing 31 which is the resin member, the terminal portion of the covered electric wire 19 is superposed thereon, and ultrasonically vibrated in this state to melt and remove the covered portion 27, the brazing material And the core wire 26 inside the covered electric wire 19 come into contact with each other, and at the same time, the core wire 26 and the terminal 33 are electrically connected via the brazing material 48. Then, as shown in FIG. 6, the contact portion 39 between the core wire 26 and the terminal 33 is pressed by the protrusion 42 of the cover 32.

The connector housing 31 of this embodiment is
As shown in FIG. 7, a hood portion 34 and an electric wire lead-out portion 35 integrally connected to one side of the hood portion 34 are provided.
The electric wire lead-out portion 35 has a bottom wall portion 36 extending from the hood portion 34, and a plurality of partition wall portions 3 on the upper surface of the bottom wall portion 36.
7 project in parallel, and a portion surrounded by the partition wall portion 37 is a groove portion 38. The groove 38 has a rectangular cross section with an open upper surface, and the terminal 33 is housed in each groove 38 to be connected to the covered electric wire 19.
In addition, receiving walls 40, 40 are provided so as to project on the front end (hood portion 34) side of both outer side portions of the partition wall portion 37 of the bottom wall portion 36. Further, on the rear end sides of both outer side portions of the partition wall portion 37,
Stopper walls 44, 44 are provided so as to project. Further, between the receiving walls 40, 40 and the stopper walls 44, 44,
It is an engaging portion 45 with which the cover 32 is locked.

The cover 32 includes a closing plate portion 41 that covers the electric wire lead-out portion 35, and the electric wire lead-out portion 35 in the closing plate portion 41.
A plurality of pressing projections 42 formed on the surface facing each other, side wall portions 43 and 43 provided outside the pressing projections 42, and an engaging wall portion 46 in which a part of the side wall portions 43 and 43 extend. ,
46 and.

The pressing protrusion 42 is formed in the groove 3 of the wire lead-out portion 35.
8 has a rectangular cross section similar to that of No. 8 and is formed at the portion facing the groove 38. This presser projection 42
Are formed to have a size slightly smaller than the groove portion 38, and are inserted into the corresponding groove portions 38 when the cover 32 is covered with the wire lead-out portion 35. By this insertion, the presser projection 42 is
The coated electric wire 19 is pressed against the terminal 33 by coming into contact with the end of the coated electric wire 19 introduced into the groove 38.

The side walls 43, 43 of the cover 32 face the receiving walls 40, 40 of the wire lead-out portion 35, and the cover 32
By covering the wire lead-out portion 35 with the receiving walls 40, 40
Abut. Further, the engagement wall portion 46 is inserted into the engagement portion 45 by covering the electric wire lead-out portion 35 with the cover 32, and the tip end portion thereof is locked to both side portions of the bottom wall portion 36. Further, in this state, the stopper walls 44, 44 restrict the movement of the cover 32 in the axial direction of the covered electric wire 19.

Connector housing 31 and cover 32
Is molded with the same material as in the first embodiment.

In the terminal 33 of this embodiment, the contact portion 39 with the mating terminal is formed on one side, and the connection portion 47 to which the terminal portion of the covered electric wire 19 is connected is formed on the other side. In the terminal 33 accommodated in the connector housing 31, the contact portion 39 is provided so as to project into the hood portion 34, and
7 is accommodated in the groove 38. The connecting portion 47 has a bottom plate 49.
And a pair of side plates 50, 50 standing up from both sides of the bottom plate 49 in the same direction, are formed in a U-shaped cross section in which the opposite side of the bottom plate 49 is opened.

Each of the side plates 50, 50 is formed with two through windows 51 for communicating the inside and the outside. Further, the width dimension between the side plates 50 is formed to be substantially equal to or slightly shorter than the width dimension in the groove portion 38. Further, conductive brazing materials 48, 48 are joined to the bottom plate 49 of the terminal 33. The brazing material 48 is made of solder and is bonded to the surface of the terminal 33 prior to connecting the core wire 26, as in the first embodiment. This joint is molten brazing material 4
8 is dropped or applied on the bottom plate 49, and then cooled to bond them.

Next, the assembly procedure of this embodiment will be described.

As shown in FIG. 7, the contact portion 39 is provided so as to project into the hood portion 34 and the connection portion 47 is accommodated in the groove portion 38 of the terminal 33 to which the brazing material 48 has been joined in advance on the bottom plate 49. It is housed in the connector housing 31. And in FIG.
As shown in FIG. 13 and FIG. 13, the terminal portion of the covered electric wire 19 is placed on the connecting portion 47 of each terminal 33 and overlapped. next,
As shown in FIG. 10, the ultrasonic horn 52 is connected to the electric wire lead-out portion 35.
Place on top and stack.

Here, as shown in FIG. 12, the ultrasonic horn 52 is provided with two projections 53 on the lower surface 54a side of the main body 54 in two stages. The protrusions 53 are respectively inserted into the groove portions 38 to sandwich the covered electric wire 19 with the terminals 33.

From this state, ultrasonic vibration is applied while applying pressure to the coated electric wire 19 and the terminal 33 with the ultrasonic horn 52. When ultrasonic vibration is applied by the ultrasonic horn 52, the covered electric wire 19
The covering portion 27 of the above heats up and melts, and the melting covering portion 29
But flows into the through window 51 as shown in FIG. In this case, the melted coating portion 29 may be provided between the through window 51 and the projection 53 of the ultrasonic horn 52, or in addition to the through window 51.
It may also enter between the inner wall of the groove 38 and the side plates 50, 50.

Further, the brazing material 48 is melted by the heat generated by the ultrasonic vibration, and the core wire 26 and the terminal 33, which are pressed by the projection 53 of the ultrasonic horn 52, are melted on the melting brazing material 48. It is electrically connected via 48.

In this case, the brazing material 48 absorbs heat when the covering portion 27 of the covered electric wire 19 is melted, and is softened or melted. The core wire 2 is softened or melted by the brazing material 48.
6 bites into the brazing material 48, and as shown in FIG.
The brazing filler metal 48 can come into contact with each other with a large contact area. By such contact between the brazing material 48 and the core wire 26,
The core wire 26 and the terminal 33 are electrically connected and connected.

After the core wire 26 and the terminal 33 are electrically connected via the brazing material 48, the ultrasonic horn 52 is removed from the wire lead-out portion 35, and as shown in FIG.
The electric wire lead-out portion 35, the engaging wall portion 46 is engaged with the engaging portion 45, and the cover 32 is held by the electric wire lead-out portion 35. At this time, the ultrasonic horn 5 is attached to the covered electric wire 19 in the groove 38.
Holes corresponding to the two projections 53 are formed respectively, and as shown in FIG. 6, the pressing projections 42 provided on the closing plate portion 41 of the cover 32 are inserted into the holes, respectively, and the core wire 26 is brazed. It is pressed onto the material 48 and the terminal 33.

In such a connection structure, the molten resin of the coating portion 29 does not hinder the contact between the brazing material 48 and the core wire 28, and the brazing material 48 is not discharged to the outside. Therefore, the brazing material 48 and the core wire 26 can surely come into contact with each other, and highly reliable connection can be performed. Further, since the core wire 26 bites into and contacts the brazing material 48, and the molten brazing material 48 adheres to the periphery of the core wire 26, the contact area between the brazing material 48 and the core wire 26 increases, and the contact resistance can be reduced. As a result, the core wire 26 and the terminal 33 can be stably connected, and the electrical reliability of the connection can be improved.

Further, the coating portion 29 melted by ultrasonic vibration flows into the through window 51 as shown in FIG.
As a result, it is possible to improve the pull-out strength of the end portion of the covered electric wire 19 in the axial direction, and it is possible to improve the reliability of mechanical connection between the end portion of the covered electric wire 19 and the terminal 33.

Further, in this embodiment, the cover 32 is detachable from the wire lead-out portion 35, so that the terminal 3
When replacing 3, the required terminal 33 can be easily taken out by removing the cover 32, and the cover 32 and the connector housing 31 can be reused.

Further, in this embodiment, since the ultrasonic horn 52 is brought into contact with the covered electric wire 19 without the intervention of the cover 32, the amplitude of ultrasonic waves is not attenuated and the energy required for welding is reduced accordingly. .

Also. In this embodiment, when the cover 32 covers the wire lead-out portion 35, the pressing protrusion 42 of the cover 32 is inserted into the hole formed by the protrusion 53 of the ultrasonic horn 52, so that the terminal 33 is inserted into the groove portion 38. Can be locked to. Therefore, in addition to the locking structure for locking the terminal 33 to the connector housing 31, the terminal 33 can be doubly locked by being locked in the groove 38 by the pressing projection 42.

[0068]

As described above, according to the first aspect of the invention, since the brazing material provided on the terminal is softened or melted when the covering portion is melted and removed by ultrasonic vibration, the core wire becomes the brazing material. It bites and the core wire and the terminal are electrically connected via the brazing material. Therefore, since the brazing material surely contacts the core wire, the reliability of the connection is improved.

According to the second aspect of the present invention, by sandwiching the terminal and the covered electric wire by the resin parts, the brazing material of the terminal comes into contact with the covered electric wire, and ultrasonically vibrates in this state to melt and remove the covering portion. Then, since the brazing material and the core wire inside the coating portion come into contact with each other, the reliability of the connection is improved.

According to the third aspect of the present invention, the covering portion of the covered electric wire is melted and removed by applying ultrasonic vibration while applying pressure, the core wire inside the covering portion and the brazing material come into contact with each other, and the brazing material is interposed therebetween. Since the core wire and the terminal are electrically connected, the brazing material and the core wire can be reliably brought into contact with each other.

[0071]

[0072]

[0073]

According to the fourth aspect of the present invention, by providing the brazing material, the brazing material comes into contact with the covered electric wire and the core wire in the covered electric wire can be surely contacted.

According to the fifth aspect of the present invention, the covering portion melted by ultrasonic vibration enters into the through window of the side plate, so that the holding force in the direction in which the covered electric wire is pulled out from the terminal is increased and the covered electric wire The terminal can be firmly fixed to the terminal.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an entire first embodiment of the present invention.

FIG. 2 is a sectional view showing a state in which a terminal and a covered electric wire are in contact with each other in the first embodiment.

FIG. 3 is a cross-sectional view of a state in which a covering portion is melted and removed by ultrasonic vibration in the first embodiment.

FIG. 4 is a cross-sectional view of a state in which a core wire and a terminal are connected via a brazing material according to the first embodiment.

FIG. 5 is a cross-sectional view showing a second embodiment and showing a state in which an ultrasonic horn is set in a state in which a terminal and a covered electric wire are overlapped with each other.

FIG. 6 is a cross-sectional view showing a second embodiment and showing a state in which a terminal and a core wire are connected via a brazing material and a cover is covered.

FIG. 7 is an exploded perspective view showing an electric wire lead-out portion, a cover, a terminal, and a covered electric wire of a connector housing in the second embodiment.

FIG. 8 shows the second embodiment and is a perspective view showing a state in which the terminal is about to be inserted into the groove portion of the wire lead-out portion.

FIG. 9 is a perspective view showing the second embodiment and showing a state in which the end of the covered electric wire is placed on the terminal inserted in the groove.

FIG. 10 is a perspective view showing a second embodiment and showing a state where an end of a covered electric wire is placed on a terminal inserted in a groove portion and ultrasonically vibrated while being pressurized by an ultrasonic horn. .

FIG. 11 is a perspective view showing a state in which a wire covers a wire lead-out portion that connects a terminal and a core wire via a brazing material in the second embodiment.

FIG. 12 is a perspective view showing an ultrasonic horn in the second embodiment.

FIG. 13 is a cross-sectional perspective view showing a state in which a terminal portion of a covered electric wire is placed and stacked on a terminal in the second embodiment.

FIG. 14 is a cross-sectional perspective view showing a state where ultrasonic vibration is applied by an ultrasonic horn from the state shown in FIG. 13 in the second embodiment.

FIG. 15 is a cross-sectional view of a conventional connection structure.

16 is a cross-sectional view of a state of being connected by the structure of FIG.

FIG. 17 is a partially cutaway perspective view of a resin chip used in another conventional connection structure.

FIG. 18 is a partially cutaway perspective view of another connection structure.

FIG. 19 is an exploded perspective view of another connection structure.

[Explanation of symbols]

11, 31 Connector housing (first resin member) 12, 32 cover (second resin member) 13, 33 terminals 18, 38 groove 19 covered electric wire 22 protrusion 26 core wire 27 Cover 28, 48 brazing material 42 Presser protrusion

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01R 4/02 H01R 43/02

Claims (5)

(57) [Claims] 1. A terminal is inserted into a groove defined by a partition.
First resin member and the groove of the first resin member
The core wire between the terminal and the
Second resin member having a projection into which the covered electric wire is sandwiched
And overlapping the first resin member and the second resin member.
By applying ultrasonic vibration in the combined state,
Melt and remove the wire coating and connect the core wire to the terminal.
A connecting structure between an electric wire and a terminal, wherein a conductive brazing material is provided at a contact portion between the terminal and the covered electric wire.
Of the partition wall portion and the projection that are joined together to partition the groove portion
Fill the molten part of the coating part in between,
The molten coating part escapes in the middle part of the protrusion along the direction
A connection structure between an electric wire and a terminal, characterized in that a notch is formed . 2. A structure for connecting an electric wire and a terminal according to claim 1.
And the terminals stand on the bottom plate in the same direction from both sides of the bottom plate.
With a pair of side plates, the part facing the bottom plate was opened.
It has a U-shaped cross section and communicates the inside and outside with the side plate.
A through window is formed so that it can fit in the groove of the first resin member.
There is a small amount of coating that is fixed and fixed and melted by ultrasonic vibration.
A connection structure between an electric wire and a terminal, characterized in that it at least penetrates into the through window portion of the side plate . 3. A terminal having a surface to which a conductive brazing material is bonded is housed in a groove of a first resin component , and a coated electric wire having a core wire coated with a resin coating portion is brought into contact with the brazing material. rear,
Insert the protrusion of the second resin part into the groove to cover the electric wire.
And by applying ultrasonic vibration while applying pressure to the terminals.
Of the inner wall of the groove and the protrusion by melting and removing the coating portion.
A notch formed in the middle of the protrusion while filling the gap
A method for connecting an electric wire and a terminal, characterized in that the brazing material is made to come into contact with the core wire at least in a softened state. 4. A coating electrode in which a core wire is coated with a resin coating portion.
The wire comes into contact with the groove of the first resin member and is inserted into the groove.
When it is sandwiched by the protrusions of the second resin member
The coating is melted and removed by sonic vibration and the core wire and
It is a terminal that passes through and conducts electricity to the contact part with the covered electric wire.
Adhesive brazing material is joined, and the inner wall of the groove and the projection
The core wire is pressed by the molten coating part filled between
Terminal characterized in that it is written e. 5. The terminal according to claim 4, further comprising a bottom plate,
With a pair of side plates standing in the same direction from both sides of this bottom plate,
A connecting portion having a U-shaped cross-section with an opening facing the bottom plate
And a through window that communicates the inside and the outside is formed in the side plate.
Connector is housed and fixed in the groove of the housing,
At least the side plate is covered by the ultrasonic vibration.
A terminal which is inserted into the through window .