JPS5910696Y2 - Electrical connection terminal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrical connection terminal, and more particularly to an electrical connection terminal suitable for attaching a copper-clad aluminum wire.

Copper-clad aluminum wire, which is made by covering the outer surface of aluminum wire with copper, is lighter than copper wire.
The weight of the electric wire can be reduced, and the reliability of electrical contact at the conductive connection portion can be made comparable to that of copper electric wire.

This copper-clad aluminum wire has its outer circumferential surface coated with copper, so the corrosion resistance in the middle part of the wire is on the same level as copper wire, and it can provide the necessary corrosion resistance. At the connection part of the connection terminal,
Since the aluminum wire is exposed at the cut end surface of the electric wire and exposed to the outside air, corrosion may progress from the cut end surface and it may become impossible to maintain a predetermined electrical connection state.

Particularly in places where the environmental conditions for use are poor, such as in the engine room of an automobile, copper-clad aluminum electric wires are susceptible to the above-mentioned corrosion, making it difficult to obtain the necessary durability and reliability.

In view of the above-mentioned problems with copper-clad aluminum electric wires, the present invention aims to provide an improved electrical connection terminal that allows the wire to be attached while shielding the connecting end surface of the wire from the outside air. It is said that

This purpose, according to the present invention, consists of a single metal plate that includes a connection retaining part, a first caulking piece part that holds the covered electric wire from above the sheath, and a core wire of the covered electric wire that is held in a bare state. a second crimping piece that covers the end of the core wire, and a third crimping piece that covers the end of the core wire; It has a single U-shaped cross section made of a metal plate, and the second caulking piece and the third caulking piece are continuous, but the third caulking piece has a U-shaped cross section. Is the center part of the bottom of the shape its legs? The third caulking piece has a protruding portion that is curved in a direction opposite to the U-shaped curving direction so as to protrude toward the space between the third caulking pieces. When crimped onto the core wire, the legs are simultaneously bent toward the protrusion, and the tips of the legs come into contact with the protrusion and are guided by the protrusion toward their own base. For electrical connection, characterized in that the third caulking piece is bent twice so that the third caulking piece has a triple cross-sectional structure including the bottom part when the cross-section is U-shaped. Reached by terminal.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a plan view showing one embodiment of the electrical connection terminal according to the present invention, and FIG. 2 is a plan view taken along line II-II in FIG. 1.
FIG. 3 is an end view of the cut portion taken along the line ■■I-III in FIG. 1.

The electrical connection terminal 1 according to the present invention is made up of a single metal plate, and has a connection engagement part 2 at one end thereof.

The connecting and engaging part 2 has a spring part 3 cut and bent into a U-shape, and a holder part 6 that faces the free spring piece 4 of the spring part 3 and defines a terminal insertion part 5 therebetween. A flat male terminal (not shown in the figure) is inserted into the insertion portion 5.

Further, at the other end of the electrical connection terminal 1, there are first and second caulking pieces 7 that stand up from both side edges and form a pair, respectively.
, 8 are provided, thereby defining a groove-shaped caulking portion for attaching electric wires.

Each of the first caulking pieces 7 engages with the covering portion of the covered electric wire 10, and each of the second caulking pieces 8 engages with the core wire 11 of the covered electric wire 10 in a region indicated by reference numeral 8. 8.

The distal end surface of the core wire 11 is shielded from the outside air in the region indicated by .

Further, the electrical connection terminal 1 has a protrusion 9 formed by stamping on the bottom of the groove-shaped wire attachment caulking part in a portion corresponding to the area 8 of the second caulking piece 8,
The substantial cross-sectional area of this portion of the groove-shaped wire mounting portion is reduced.

As clearly shown in FIG. 3, this protrusion 9 protrudes in a relatively gentle arc from the bottom of the caulking part for attaching the grooved electric wire.

Next, as described above with reference to FIGS. 4 and 5? The procedure for attaching the covered electric wire 10 to the electrical connection terminal 1 made of a certain type will be explained.

First, remove the coating from the tip of the insulated wire 10 to expose the core wire 11 of an appropriate length, and place the core wire 11 between the second caulking pieces 8, particularly between the region 8 of the wire. death,
The tip end surface of the core wire 11 is brought into contact with the protrusion 9.

Next, in this state, each of the first and second caulking pieces 7, 8 is turned inward to perform caulking.

As a result, the first caulking piece 7 wraps around and fixes the covering portion of the covered electric wire 10, and the second caulking piece 8
The area 8 of the second caulking piece 8 wraps around the core wire 11 and is electrically and mechanically attached to the electrical connection terminal 1, and the area 8 of the second caulking piece 8 It is caulked following the protrusion 9 so as to close the groove of the groove-shaped electric wire attachment caulking portion, and cooperates with the protrusion 9 to shield the tip end surface of the core wire 11 from the outside air.

Since the tip end surface of the core wire 11 is shielded from the outside air in this manner, corrosion of the core wire 11 does not progress beyond the tip end surface.

In this case, the core wire 11 of the caulking part for attaching the grooved electric wire
A region 8 of the second caulking piece 8 that shields the tip end surface of the second caulking piece 8 from the outside air.
Since the substantive cross-sectional area of the portion of the second caulking piece 8 is smaller than that of the region 8I by an amount corresponding to the amount of protrusion of the protruding portion 9, the portion of the region 8 of the second caulking piece 8 is caulked to the core wire. 11, and the protrusion 9 protrudes in a gentle arc from the bottom of the caulking part for attaching the grooved electric wire, so that the caulking piece can easily slide when caulking. After the above-mentioned caulking is completed, a gap is created there, and the tip end surface of the core wire 11 is effectively shielded from the outside air.

Although the present invention has been described in detail with respect to specific embodiments above, it will be appreciated by those skilled in the art that the present invention is not limited to this and that various embodiments are possible within the scope of the present invention. It should be obvious.

[Brief explanation of drawings]

FIG. 1 is a plan view showing one embodiment of the electrical connection terminal according to the present invention, and FIG. 2 is a plan view taken along line II-II in FIG. 1.
3 is a cross-sectional view along the line III-III of FIG. 1.
Fig. 4 is an end view of the cut part along line III-III in Fig. 1 after caulking.
The figure is a perspective view showing the electrical connection terminal according to the present invention in which covered wires are placed and crimped. 1... Electrical connection terminal, 2... Connection engagement part,
3... Spring part, 4... Free spring piece, 5... Terminal insertion part, 6... Holder part, 7... First caulking piece, 8...? Second caulking piece, 8,...A region where the core wire of the covered electric wire is electrically and mechanically attached to the electrical connection terminal, 8...A region where the tip of the core wire of the covered electric wire is shielded from the outside air, 9. ... Protrusion, 10 ... Covered electric wire, 1
1... Core wire.

Claims (1)

[Scope of utility model registration request] Consisting of a single metal plate, it includes a connection holding part, a first clamping piece that holds the insulated wire from above the sheath, and a second clamping piece that holds the core wire of the insulated wire in a bare state. and a third crimping piece portion that covers the end of the core wire, and the first, second and third crimping piece portions form a single U-shape made of the metal plate before being crimped. The second crimping piece part and the third crimping piece part are continuous, but the center part of the bottom of the U-shaped cross-sectional shape of the third crimping piece part is A protrusion is formed by being curved in a direction opposite to the U-shaped curving direction so as to protrude toward between the two legs, and each leg of the third caulking piece is connected to the second caulking piece. When the leg is tightened onto the core wire, it is simultaneously bent toward the protrusion, and the tip of the leg comes into contact with the protrusion and is guided by the protrusion toward its own root. The third caulking piece part is configured to form a triple cross-sectional structure including the bottom part when the cross section is U-shaped. Terminal hole for connection.