JPS5910695Y2 - 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.

Since the outer circumferential surface of this copper-clad aluminum wire is coated with copper, the corrosion resistance in the middle part of the wire is on the same level as copper wire, and the required corrosion resistance can be obtained. At the connection part of the electrical connection terminal, the aluminum wire is exposed at the cut end of the wire,
Since the aluminum wire is exposed to the outside air, corrosion may progress from the cut end surface, and the predetermined electrical connection may not be maintained.

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, is made of a single metal plate, and includes a connection retaining part, a first force/clamp part that holds the covered wire from above the covering, and a part that holds the core wire of the covered wire from the bare wire. the first and second caulking pieces have a second caulking piece portion that holds the core wire in a fixed state, and a third caulking piece portion that covers the end portion of the core wire, and the first and second caulking piece portions are attached to the metal plate before being caulked. The third caulking piece has a single U-shaped cross-sectional shape, and before being caulked, the third caulking piece has a metal piece with a U-shaped cross section that is continuous with the second caulking piece, and the U-shaped cross section of the third caulking piece. The metal piece has a double U-shaped cross section as a whole, consisting of a metal piece that is folded back at the ends of both legs of the metal piece and extends along the inside of the metal piece with the U-shaped cross section. , each leg of the third crimping piece is simultaneously attached to its own body when the second crimping piece is crimped onto the core wire. This is accomplished by an electrical connection terminal characterized in that it is bent to form a quadruple cross-sectional structure.

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

The attached 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 showing the line II-- in FIG.
3 is a cross-sectional view taken along line III-II in FIG.
FIG. 4 is an end view of the cut portion taken along line I, and a perspective view showing a fragmentary crimped portion for attaching an electric wire of the electrical connection terminal.

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

The connection and retention part 2 has a spring part 3 bent into a U-shape and a holder part 6 which faces the spring piece 4 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. The core wire 11 is engaged with the core wire 11 so as to shield the distal end surface of the core wire 11 from the outside air in the area indicated by the reference numeral 8.

The area 8 of the second caulking piece 8 is shown in FIGS. 3 and 4.
As clearly shown in the figure, it is folded back and has twice the thickness as the region 8, and is curved relatively gently from the bottom of the caulking part for attaching the grooved electric wire. He was barely standing up.

Next, a procedure for attaching the covered wire 10 to the electrical connection terminal 1 having the above-described structure will be explained with reference to FIGS. 5 to 7.

First, remove the coating from the tip of the insulated wire 10, expose the core wire 11 for an appropriate length, and insert the core wire 11 between the second caulking pieces 8, particularly between the regions 8. The distal end surface of the core wire 11 is brought into contact with the stepped portion between the regions 8 and 8.

Next, in this state, turn each of the first and second caulking pieces 7 and 8 inward. and caulk.

As a result, as clearly shown in FIGS. 6 and 7, the first caulking piece 7 wraps around and fixes the covering portion of the covered electric wire 10, and the second caulking piece 8 Of these, the area 8 wraps around the core wire 11 and is electrically and mechanically attached to the electrical connection terminal 1, and the area 80 of the second force-strengthening piece 8 is It is crushed so as to close the groove of the caulked part for attaching the grooved electric wire, thereby shielding 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 way, corrosion of the core wire 11 does not progress beyond the tip end surface.

In this case, the portion of the region 8 of the second caulking piece 8 that shields the tip end surface of the core wire 11 from the outside air is substantially thicker than the portion of the region 8. By ensuring sufficient thickness to shield the surface, and by standing up while being gently curved from the bottom of the caulking part for attaching the grooved electric wire, a gap will be created there after the caulking is completed as described above. <The tip end face of the core wire 11 is better 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 an end view taken along line III-III in FIG. 1, FIG. 4 is a perspective view showing a fragmentary crimped portion for attaching electric wires, and FIG. 5 is a cross-sectional view taken along line III-III in FIG. FIG. 6 is a plan view showing the state after crimping, and FIG. 7 is a perspective view thereof. 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, 10...A covered electric wire, 11... Core wire.

Claims (1)

[Scope of utility model registration request] A connection retaining part, a first caulking piece part that holds the insulated electric wire from above the sheathing, and a second caulking piece part that holds the core wire of the insulated electric wire in a bare state; a third caulking piece portion that covers the core wire; the first and second caulking piece portions have a single U-shaped cross section made of the metal plate before being caulked; Before the caulking piece is caulked, there is a U that is continuous with the second caulking piece.
A metal piece with a U-shaped cross section and a metal piece that is folded back at the ends of both legs of the metal piece with a U-shaped cross section and extends along the inside of the metal piece with a U-shaped cross section. The legs have an overall double U-shaped cross-sectional shape, and each leg of the third crimping piece is simultaneously crimped onto itself when the second crimping piece is crimped onto the core wire. An electrical connection terminal characterized by being bent to form a quadruple cross-sectional structure.