JP3019285B2 - Crimp terminal and connection method of crimp terminal and electric wire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crimp terminal capable of stably connecting a wire conductor with excellent electrical characteristics, and a connection between the crimp terminal and the wire conductor. It is about the method.

[0001]

Perspective view of the Related Art FIG 6 is a perspective view showing an example of a crimp terminal A, one side of the substrate unit 1 (left side in FIG. 6)
Is provided with an annular electric connection portion 2, and an electric wire connection portion 3 is provided on the other side of the substrate portion 1. The wire connection part 3 is
Coating crimping portions 3a, 3a standing upright from both sides of the
The distal end of the electric wire W, which is composed of the conductor crimping portions 3b and 3b and is connected to the crimp terminal A,
Is exposed.

In order to connect an electric wire W to this crimp terminal A,
The electric wire W is placed on the substrate part 1, and the conductor crimping part 3b is bent inward by the upper jig 6a and the lower jig 6b to be crimped.
Then, the conductor portion 5 is crimped, and the covering crimping portions 3a, 3a are similarly crimped to the covering 4 by a pair of jigs (not shown). Thus, the conductor crimping part 3b is electrically connected to the conductor part 5 of the electric wire W, and the covering crimping part 3a holds the electric wire W.

[0003] At this time, the clamping pressure of the conductor crimping portion 3b is insufficient, or a gap between the conductor crimping portion 3b and the conductor portion 5 or the clearance raw between the wires constituting the conductor portion 5 < However, there is a problem that the electric resistance increases, and furthermore, a problem such as an increase in electric resistance due to generation of an oxide film and adhesion of dust occurs. In order to solve such a problem, we have previously proposed a conductor crimping portion 3b and a conductor portion 5 by an energy beam such as a laser, and a crimp terminal for welding the electric wires in the conductor portion 5 to each other ( Japanese Patent Laid-Open Publication No. 2-1038
No. 76).

[0004] crimping terminal according to the above proposal, as shown in the perspective view of FIG. 7, the conductor crimping portion 3b of the brass of the crimp terminal A ₁
A slit-shaped through-hole 7 is provided on the conductor 5, and after the conductor crimping portion 3 b is crimped to the conductor 5, an energy beam is applied by an energy beam generator 8 such as a laser to the conductor 5 and the through-hole 7 exposed from the through-hole 7. The purpose is to stabilize the electric resistance of the electric wire connection to a small value by irradiating and heating and welding. Furthermore , when the end of the conductor crimping portion 3b and the conductor portion 5 are heat-welded as shown by a dotted line in FIG. 7 , the welding area increases.

[0005]

[SUMMARY OF THE INVENTION Currently, as a terminal material, although conductivity and brass is excellent in relatively the mechanical strength is used, in the invention according to the proposed earlier, the energy beam When the brass material is heated , the molten metal is scattered due to the intense evaporation of zinc as an additional element, so that there is a problem to be solved such that it is difficult to obtain good welding.
It has been found. To obtain a good weld by the energy beam, pure copper called copper, or must be created in a practical copper alloy such as phosphor bronze, in this case
The first issue is the mechanical properties required for the terminal material for pure copper.
There were insufficient, after most other practical copper alloy is expensive compared to brass, no it is inevitable that the cost also over both sides of the material costs and manufacturing costs for poor moldability,
That's what it means.

[0006] As the second problem, the dimensions of the crimp terminal A ₁ is standardized and the conductor crimping portion 3b is provided a through hole 7, the more the contact pressure is reduced, can not be ensured the original crimp performance structure since it is, even if caulking is insufficient, it is necessary to secure a sufficient welding region to be able to satisfy all the required properties simply weld is that. For this purpose, it is necessary to improve the current situation in which the region to be directly received by the energy beam and welded is only the upper layer, and to weld other than the upper layer. An object of the present invention is to solve such a problem, and to provide a crimp terminal capable of welding a crimp terminal and the entire end surface of a conductor portion with almost no increase in cost, and a method of connecting the crimp terminal to an electric wire. To provide.

[0007]

In order to achieve the above object, a crimp terminal of the present invention is provided with a conductor crimping portion for clamping a wire conductor portion by crimping on both sides of a substrate, and the crimping terminal is provided on the substrate. it is characterized in that the abutment wall by mounting the energy beam welding is made of a metal material capable member such as a laser having conductivity is erected.

[0008] The method of connecting the crimp terminal and the electric wire is such that a conductor crimping is performed on both sides of the substrate by crimping the electric wire conductor portion.
And the laser energy on the substrate
Attach a member made of conductive material that can be beam welded
Using a crimp terminal with an abutting wall standing, on the substrate ,
With placing the wire conductor portion, the distal end surface of the conductor portion in contact with the <br/> contact wall, in this state, and caulked to the conductor portion of the conductor crimping portion, then, a laser, etc. Up the energy beam
Irradiate the contact wall and the tip of the conductor to illuminate the contact wall and conductor.
It is characterized in that it is welded to the tip .

[0009]

With the above-structured crimp terminal , energy beam welding such as laser can be performed on the substrate of the conventional crimp terminal.
Since it is a simple structure in which a member made of a functional conductive material is mounted and the contact wall is erected, the manufacturing cost of the crimp terminal is almost the same as that of the conventional product. When the distal end surface of the wire conductor is brought into contact with the contact wall when connecting to the wire conductor, the position of the wire conductor is correctly positioned. Next, after the conductor crimping portion and the coating crimping portion are crimped, when the contact wall and the tip portion of the conductor portion are irradiated with an energy beam such as a laser, the upper layer portion of the conductor portion is welded and the melted contact portion is welded. since sealing wall dissolves the distal end of the conductor portion, the entire surface and contact wall of the tip portion of the conductor portion are welded integrally.

[0010]

EXAMPLES With reference to FIGS examples of the present invention, FIG. 1 is a perspective view of a state in which the removal of the electrical connections from the crimp terminal A ₂ of the present invention, FIG. 2 in FIG. 1 It is a partially broken perspective view. Figure 1 shows only the wire connecting portion 3 side of the crimp terminal A _2, the wire connecting portion 3, the coating crimping portion 3a rising from both sides of the substrate unit 1, 3a and the conductor crimping portion 3b, is constituted by a 3b, the substrate Although the electrical connections to the left of section 1 (not shown) is provided is the same as the conventional example, the crimp terminal a ₂ of the present invention, abutment wall 10 is erected on the substrate portion 1.

As the material of the contact wall 10, a metal material having conductivity and capable of energy beam welding such as laser is used, and electrolytic copper whose material cost is equal to or less than that of brass material is used.
That it is desirable. The fixed part 10 is located at the lower end of the contact wall 10
a is a member that is bent and extended substantially at a right angle,
a is fixed to the substrate portion 1 by means such as spot welding (see FIG. 2).

As shown in FIG. 3, the contact wall 10 is on the left side of the conductor crimping portion 3b, and a range of a length B from the right end of the fixing portion 10a overlaps with the conductor crimping portion 3b. In position.
Therefore, the conductor 5 is positioned with respect to the conductor crimping portion 3b by a simple operation of contacting the conductor 5 with the contact wall 10, and
When the conductor crimping portion 3b is crimped, the conductor portion 5 placed in the range of the length B of the fixing portion 10a is securely attached to the conductor crimping portion 3b.
It is pinched.

The method of connecting the crimp terminal A ₂ and the electric wire W configured as described above will be described. The electric wire W is placed on the substrate 1 with the end face of the conductor portion 5 abutting against the contact wall 10. Then, the conductor portion 5 is positioned. Next, the conductor crimping part 3b and the covering crimping part 3a are crimped. By this caulking, the conductor portion 5 is sandwiched between the fixing portion 10a and the conductor crimping portion 3b, and the sheath 4 of the electric wire W is held by the sheath crimping portion 3a (see FIG. 4).

Next, when an energy beam is applied to the abutting wall 10 and the tip of the conductor 5 by a device similar to the energy beam generator 8 shown in FIG. 7, the upper layer of the conductor 5 is heated and welded. At the same time, the contact wall 10 is melted and melts into the gap between the conductor portion 5 and the fixed portion 10a and the gap between the electric wires in the conductor portion 5, and the tip of the conductor portion 5 and the contact wall 10 are integrally welded. You. Thus, the connection portion of the wire W and the crimping terminal A ₂ is the electrical resistance is extremely small, is kept in a stable connected state without being deteriorated by and aging.

FIG. 5 shows another embodiment of the present invention. After the end face of the conductor portion 5 is brought into contact with the contact wall 10, the tip portion 10b of the contact wall 10 is placed on the conductor portion 5. The bent tip portion 10b is irradiated with an energy beam such as a laser to melt it, and the contact surface of the contact wall 10 and the contact portion of the conductor portion 5 are irradiated and integrated as in the above-described embodiment. Welding. In this case, there is an effect that the bent end portion 10b melts down and fills the gap between the electric wires in the conductor portion 5.

[0016]

Since the present invention is configured as described above, the following effects can be obtained. (1) The crimp terminal of the present invention can be obtained by simply mounting a member made of a metal material capable of energy beam welding such as a laser to a conventionally used crimp terminal of a standard type and erecting the contact wall. Yes, the cost is hardly increased as compared with the conventional crimp terminal. (2) The crimp terminal of the present invention can improve the performance by energy beam welding while making use of the electrical and mechanical bonding characteristics by crimping, and thus has high quality and high reliability.
It can be a crimp terminal. (3) The abutment wall functions as a wire positioning member when setting the wires, which simplifies the work of setting the wires and enables accurate setting of the position of the wires.
You. Further, abutment wall, since integrated with the wire conductor portion is dissolved by the energy beam such as a laser, has a function of holding a stable bonding characteristics. (4) Since the conductor crimping portion can be kept in the current shape , there is no need to change data on design and characteristics in the past, and development and design costs can be kept low. The material of the contact wall can be selected from materials other than brass.

[Brief description of the drawings]

FIG. 1 is a perspective view of a crimp terminal of the present invention in a state where an electric connection portion is removed.

FIG. 2 is a partially cutaway perspective view of FIG.

FIG. 3 is a longitudinal sectional view of FIG.

FIG. 4 is a perspective view of a crimp terminal in which a conductor is crimped.

FIG. 5 is a longitudinal sectional view of a crimp terminal showing another embodiment of the present invention.

FIG. 6 is a perspective view illustrating a crimping process of a conventional crimp terminal.

FIG. 7 is a perspective view illustrating energy beam welding of a conventional crimp terminal.

[Explanation of symbols]

A, A _1, A ₂ crimp terminal W wire 1 substrate 3 wire connecting portion 3a covering crimping portion 3b conductor crimping portion 4 covering 5 conductor section 8 the energy beam generator 10 contacting wall 10a fixed part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 4/18 H01R 4/02 H01R 43/02

Claims (2)

(57) [Claims] On both sides of 1. A substrate is erected conductor crimping portion nipping the wire conductor portion by caulking, on a substrate, a metallic material capable of energy beam welding such as laser has conductivity The contact wall is erected by mounting the
Crimp terminal, characterized in that is. 2. An electric wire conductor on both sides of a substrate by crimping
The conductor crimping part that clamps the part is erected and on the board
Is it a conductive material that enables energy beam welding such as laser
Uses crimp terminals with abutting walls mounted with a member made of
And, on the substrate, thereby placing the wire conductor portion, the distal end surface of the <br/> conductor unit abuts on the contact wall, in this state, pressing the conductor crimping portion to the conductor portion And then irradiate an energy beam such as a laser beam to the contact wall and the tip of the conductor.
And welding the corresponding contact wall and the end of the conductor portion to each other. [0001]