JPS59165390A - Method of bonding solderless terminal and terminal thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crimp terminal method for crimp-connecting electric wires and the terminal.

A conventional crimp method and its terminal will be explained using, for example, a crimp terminal shown in FIG. That is, a crimp terminal has a crimp part 2 integrally formed with a contact part 1 with another member that is fixed with a screw, and an electric wire 3 is crimp-connected to the crimp part 2.
The crimp section 2 is composed of a wire nozzle 4, an insulation nozzle 5, and a transition 6 connecting them. The wire nozzle 4 is for crimping the core wire 7 of the electric wire 3 and is formed in a U-shape near the contact portion 1.
The wire crimper shown in Figure 2'? When the core wire 8 is lowered, it is bent into a curved shape between the core wire 7 and the anvil 9, and the core wire 7 is crimped and connected. The insulation norel 5 is the covering part lo of the electric wire 3.
It crimps and holds the electric wire 3 from above, and is formed into a U-shape at the end of the crimping part 2, which is higher than the height of the wire nozzle 4, and as shown in FIG. As it descends, it is bent into a curved shape between it and the anvil 9, and the electric wire 3 is crimped and held. Therefore, the crimping portion 2 is crimped by the crimping mechanism, the wire crimper 8, the insulation crimper nog 11, and the anvil 9. The performance of the crimping part 2 is ensured by controlling the range of effective fringe height of the wire nozzle 4, electrical performance such as contact resistance, and mechanical performance such as tensile strength and wire bending strength. It is something. The height of the wire nodal 4 after crimping the core wire 7, that is, the crimp height, is within the effective range A that overlaps the good range I of tensile strength and the good range ■ of contact resistance in Fig. 4. The above electrical and mechanical performance is guaranteed.

However, in conventional crimp terminals, the wire nozzle 4 and the electric wire 3 are crimped at the same height over almost the entire length of the wire nozzle, so it is difficult to satisfy the ventilation and mechanical performance requirements after crimping. The effective range A of the crimp height is narrow as shown in FIG. Therefore, there was a drawback that it was difficult to obtain satisfactory performance after crimping. Further, when the crimp height of the wire barrel 4 becomes high, the electrical performance deteriorates, and when the crimp height of the wire barrel 4 becomes low, the mechanical performance deteriorates.

SUMMARY OF THE INVENTION The present invention provides a crimp terminal method and terminal in which the required electrical and mechanical performance can be reliably obtained by changing the crimp height of the wire nozzle after crimping. In order to achieve this objective, the crimping method according to the present invention is to change the crimp height of the wire barrel after the core wire is crimped in the wire crimping section by pressing with a press tool that changes the depth of the crimping recess. The crimp terminal according to the present invention is characterized in that the wire nollel of the wire crimping part is formed with a different height, and the crimp height of the wire barrel after the core wire is crimped is changed. be.

Embodiments of the present invention will be described in more detail below with reference to the drawings. FIG. 5 is a perspective view of the crimp terminal.

Reference numeral 21 denotes a male contact portion, 22, which fits into a female terminal, for example.
is a crimping part for crimping and connecting electric wires.

The crimping part 22 is a wire no-no-rel 2 that is crimped with the core wire of the electric wire.
3. An insulation nozzle 24 for crimping the electric wire from above the sheath, a wire nozzle 23, and an insulation nozzle 24. ! =e Consists of a connecting transition 25. The wire barrel 23 has a U-shaped cross section, and has two stepped portions 41 and 42 formed from the contact portion 21 side, increasing the height in stages. A cut 26 is provided at the boundary between the stepped portions 41 and 42 to divide the wire barrel 23 into two. On the other hand, as shown in FIGS. 6 and 7, the crimping recess 28 of the wire crimping pug 27, which is a pressing tool, is formed in two stages, a deep part and a shallow part, and the core wire is pressed by the wire crimping pug 27. The wire nozzle barrel 23 crimped has a low crimp height portion 23c and a high crimp height portion 23d depending on the height of the wire barrel 23, as shown in FIG. Insulation crimper J for the wire crimper 27? 29 is connected, and is lowered together with the wire crimper ξ 27 to press the insulation barrel 24 to press and hold the insulation barrel 24 over the covering of the electric wire 30.

In the above embodiment, the wire nozzle 23 is formed to have two heights, but it can also be formed to have three or more heights.

FIG. 8 and FIG. 9 are diagrams showing other embodiments of the first invention. The crimp terminal has wire nozzles 33 formed at the same height as in conventional crimp terminals, and as shown in FIG. and press the wire nozzle 33. The wire crimper 37 has a wire norel 3.
A crimp recess 38 is provided in which the core wire of the electric wire is crimp-connected by curving the wire, and the depth of the crimp recess 38 is two steps deeper. Connect the wire cleaner E37Ku insulation cleaner 939. Insulation barrel ξ39 has insulation barrel 34.
In order to crimp and hold the electric wire 40 by curving the wire, a crimp recess 49 deeper than the crimp recess 38 of the wire crimper ξ37 is provided.

Therefore, when the wire crimper 37 is lowered and the wire nozzle 33 is bent and crimped onto the core wire, the crimp height of the wire nozzle 33 after crimping is formed in two stages, high and low, as shown in FIG. Ru. Insulation Clino J at the same time? 39 is insulation noserel 34t-
The electric wire 40 is crimped while being bent, and the electric wire 40 is securely held in the crimp terminal.

FIGS. 10 to 12 are side views showing other examples of wire knobs. These wire norels 43.44,
45 has a U-shaped cross section like the wire nozzle 23 of the embodiment shown in FIG.
The heights of 44 and 45 differ depending on the location. That is, in the wire nozzles and rails 43 in FIG. 10, the height of the contact portion 461!1η of the wire nozzles gradually decreases, increases at the middle part, and finally reaches a height slightly lower than the middle part. is formed. In the wire nozzle 44 of FIG. 11, the height of the wire nozzle gradually decreases and slopes from the contact portion 47 side, reaches the lowest height at the middle part, and then gradually increases and slopes. It is formed. In the wire nozzle 45 shown in FIG. 12, the height of the wire nozzle from the contact portion 48 side gradually decreases in a curved shape, reaches the lowest height at the middle part, and then gradually curves. It is formed to be high. Therefore, when these wire nozzles 43, 44, and 45 are pressed with a wire crimp nozzle having a crimping recess with a depth corresponding to the height of the wire nozzle, the crimp height wire nozzle L/le 43, 44
．． You can get one according to the height of 45. Further, in a crimp terminal in which the wire nozzle is formed diagonally as shown in FIG. 13, the four crimp portions of the wire crimp or wire crimp no.

In the above embodiment, the crimping recesses 28.degree. 38 are provided at different depths in the wire crimp ξ27.

Further, although the insulation nozzles 24 and 34 are provided in the crimp portion in the above-described embodiment, it is not necessarily necessary to provide them. Further, the wire crimper groove is not limited to one type, and the height of the wire crimper may be changed depending on the length of the wire crimper, which is a combination of a plurality of molds that form four predetermined crimped parts.

Further, in the above embodiment, a crimp terminal in which the upper part of the wire nozzle is open is described, but it is also possible to use a crimp terminal in which the wire nozzle is closed, as shown in FIG. Of course. In addition, although the wire nozzle was mainly intended for crimping in the vertical direction, the present invention can also be used when crimping the closed type wire nozzle not only in the crimping direction but also in the lateral direction. It is possible to apply the pressing tool according to the above.

As is clear from the above explanation, according to the crimping method according to the present invention, by forming high and low crimp height areas using a pressing tool with different crimping recess depths, either one of the high and low crimp heights is Even if the crimp height of one is within the effective range B, which is wider than the effective range A shown in Fig. 15, the other crimp height is within the effective range A, so the wire knot rail has good tensile strength. Crimp connection is always achieved within a range that includes a good range I and a good contact resistance range (3). The height of the terminal crimper and the wire nollel of the terminal to be crimped is usually determined according to the thickness of the wire, but when wires of one thickness are crimped to different heights as in the method of the present invention. When crimp-bonding is performed, it is desirable to vary the amount that the wire nozzle bites into the core wire depending on the crimp height, and the present invention meets that desire. As a result, the crimping process is difficult, the electrical and mechanical performance required for crimping are fully satisfied, and the reliability is high. In addition, high performance is maintained even if the crimp height varies, and the effective crimp height is wide, making it extremely useful for managing crimping operations.

Further, according to the crimp terminal according to the present invention, the crimp height can be formed to a reasonably high or low level, thereby achieving the electrical resistance required for crimp for the above-mentioned reasons.

Effects similar to those obtained by the above method, such as sufficiently satisfying mechanical performance, can be obtained.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional crimp terminal, Fig. 2 is a front view of the wire norel in a state where it is crimped, Fig. 3 is a partial side view of the crimp terminal after crimping, and Fig. 4 is a partial side view of the crimp terminal after crimping. Crimp performance curve diagram, FIG. 5 is a perspective view of the crimp terminal according to the present invention, FIG. 6 is a front view of the crimp terminal in a state where the wire nozzle is crimped, and FIG. 7 is a side view of the crimp terminal after crimping. 8 is a front view of a crimp terminal showing another embodiment of the present invention in a state in which the wire nodal is crimped; FIG. 9 is a side-thin cross-sectional view of the crimp terminal after crimping; FIG. 10 is a table Fig. 12 is a side view showing another example of the wire nozzle shape, Fig. 13 is a perspective view of a crimp terminal with an oblique wire nozzle, and Fig. 14 is a crimp terminal with a closed wire nozzle. FIG. 15, a perspective view of the terminal, is a crimp performance curve diagram of the crimp terminal according to the present invention. 22...Crimping part, 23.33.43,44.45...Wire/permanent rail,
27. 37... Wire crimp as a suppressor, 28.
38...Crimping recess, 36...Anvil serving as a pressing tool. Agent Ken Aihara Figure 1 Figure 2 Figure 3 Figure 4 Gino (Maro) Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 12 Figure 14 Figure 15 (Fig. crimp height shoulder tag)

Claims (1)

[Claims] 1. A crimp terminal crimping method in which the height of the fringe of the wire nozzle after the core wire is crimped at the stain line crimping part is changed by pressing with a press tool that has a varying depth of the crimping recess. 2. A crimp terminal characterized in that the height of the wire nodal of the wire crimping portion is varied, and the height of the fringe of the wire nozzle after the core wire is crimped is changed.