JPH0720844Y2 - Crimp terminal for high-voltage resistance wire - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a technique for improving the strength of a crimp terminal used for a terminal portion of a resistance wire for high voltage connected to, for example, an ignition plug or a distributor of an automobile. It is a thing.

[Conventional technology]

A crimp terminal used for terminal connection of a resistance wire for high voltage is disclosed in Japanese Utility Model Laid-Open No. 52-12879. As shown in FIG. 5 to FIG. 7, this is a cut-and-raised piece 8 from the board in the middle of the holding portion 1 for the electric wire and the fitting portion 2 which is engaged with the spark plug or the electrode of the distributor. Is provided, and the electric wire 7 and the holding portion 1 are crimped and fixed to the cut-and-raised piece 8 in a state in which the folded back bent portion 7b of the core wire 7a exposed by peeling off the insulating coating 9 at the end of the electric wire 7 is pressed against It was done like this.

In the crimp terminal having the above-described structure, since the cut-and-raised piece 8 is formed in the middle of the terminal board, there is a possibility that the board has a hole, the strength is lowered, and the terminal is deformed.

Even if such a crimp terminal T has a straight shape, the strength of the intermediate portion 6 becomes weak because the area is small, and especially when the intermediate portion 6 is bent in an L shape,
It has been a conventional problem that it cannot be molded into a circular shape, and the area of the bent portion becomes smaller, so that the strength becomes weak.

Further, since the size of the cut-and-raised piece 8 is limited, there is a drawback that the folded back bent portion 7b of the core wire to be pressure-welded protrudes from the cut-and-raised piece 8 and causes poor conduction and burnout.

Another known example is an electrical connection terminal described in Japanese Utility Model Publication No. 55-105270. This is because a reinforcing intervening piece is symmetrically extended on both sides of the connecting piece corresponding to the intermediate portion 6 of FIG. 5, and the intervening piece is bent and the wire core crimping and holding section corresponding to the holding section 1 is provided. And the protruding piece 10 at the tip of the intervening piece is bent substantially at right angles to the axial direction of the terminal.

However, in this known example, the intervening piece reinforces the wire core crimping and holding portion (the portion corresponding to the holding portion 1), but does not reinforce the connecting piece (the portion corresponding to the intermediate portion 6) itself. When such an intervening piece is used to reinforce the connecting piece (intermediate portion 6), the intervening piece is simply bent and overlapped, and since the electric wire is not held in this part, the intervening piece does not float up. It becomes useless for reinforcement.

Further, depending on the shape of the connecting piece, the intervening piece may not be formed on both sides.

[Problems to be solved by the invention]

The present invention is intended to eliminate the above-mentioned drawbacks of the prior art.The reinforcing piece can be bent and overlapped on the middle portion without being influenced by the shape of the middle portion. It is an object of the present invention to provide a crimp terminal for a high-voltage resistance wire that can be sufficiently reinforced.

[Means for solving problems]

In order to achieve the above object, the present invention provides a reinforcing piece at an intermediate portion between a holding portion for crimping and fixing a terminal portion of a high voltage resistance wire of a crimp terminal and a fitting portion for engaging with an electrode of an ignition plug or the like. And a claw and a pressure contact piece connected to the reinforcing piece are integrally provided, and the reinforcing piece is bent and polymerized from one side end along the shape of the intermediate part to be reinforced with at least the claw at the other side end of the intermediate part. It is characterized in that a piece is fixed to an intermediate portion, and the press-contact piece is bent near the rear end portion of the holding portion and positioned substantially at right angles to the axial direction of the terminal.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings. First
The figure is a perspective view of the crimp terminal T bent into an L-shape, and FIG. 2 is a developed view of the crimp terminal T shown in FIG. 1. In these figures, 1 is an end portion of a high-voltage resistance wire. The holding portion 2 to be crimped is a fitting portion that is attached to an electrode or the like of the spark plug on the other side. Reference numeral 3 is a pressure-contact piece that is pressure-contacted with the core wire of the high-voltage resistance wire, and 4 is a reinforcement piece that is connected to the crimp terminal T.
And the reinforcing piece 4 is also coupled. 4b is a punch which is formed as needed, and is a projection in which a part of the reinforcing piece 4 is cut out in a triangular shape. Reference numerals 5a and 5b denote claws integrally formed on both sides of the intermediate portion 6, and when the reinforcing piece 4 is bent and overlapped on the intermediate portion 6, the claws are bent to prevent the reinforcing piece 4 from floating. So that it is fixed. 6 is an intermediate portion between the holding portion 1 and the fitting portion 2.

As shown in FIG. 2, a metal thin plate made of stainless steel or the like, which is a material, is punched to form the holding portion 1 into a horseshoe shape and the fitting portion 2 into a cylindrical shape. And a crimp terminal T as shown in FIG. 1 is formed. At this time, the reinforcing piece 4 is bent so as to overlap the intermediate portion 6 and is fixed by the claws 5a and 5b at both ends, so that the reinforcing piece 4 does not float up from the intermediate portion 6 and the strength of the intermediate portion is sufficiently increased. Can be reinforced.

The positions of the claws 5a and 5b that can be formed are limited by the shape of the intermediate portion 6. However, if the reinforcing piece 4 is provided only on one side of the intermediate portion, at least the claw 5b on the opposite side of the reinforcing piece 4 can be formed. Can be achieved.

The press-connecting piece 3 is bent at the connecting portion with the reinforcing piece 4 and is positioned in the vicinity of the rear end of the holding portion 1 substantially at right angles to the axial direction of the crimp terminal. Since this press-contact piece 3 is not cut and raised from the base plate of the crimp terminal, its size can be freely set, and if the holding portion 1 is of a size that can substantially close the lumen formed during crimping. , Core wire bend 7b as before
It is also possible to prevent defective connection from occurring.

3 and 4 show the connection state of the crimp terminal and the high-voltage resistance electric wire. As shown in FIG. 3, the pressure contact piece 3 is the holding portion 1 side of the rising portion 4a of the reinforcing piece 4. Of the press contact piece 3 is formed in advance so as to come into close contact with the press contact piece 3. The resistance wire 7 for high voltage is stripped of the insulating coating 9 at the end to expose the core wire 7a, and bent into a U-shape to form a bent portion 7b, which is pressed to both the holding portion 1 and the pressure contact piece 3. In this state, it is crimped onto the holding portion 1. By this crimping, the insulation coating portion 9 slightly extends toward the pressure contact piece 3 side, and the bent portion 7b of the core wire is strongly pressed against the pressure contact piece 3. If the press contact piece is received by the end face of the rising portion 4a, or if the punch 4b is provided, the press contact piece 3 can be supported by this press contact force so as not to fall. In this way, the core wire 7a comes into close contact with the pressure contact piece 3 and the inner surface of the holding portion 1, and a good electrical contact state can be obtained.

[Effect of device]

As described above, according to the present invention, the reinforcing piece is bent and overlapped with the intermediate portion, and the claws are bent to firmly fix the both, so that the intermediate portion between the holding portion and the fitting portion of the crimp terminal can be sufficiently secured. Can be reinforced. That is, the reinforcement pieces can be prevented from rising and the strength of the intermediate portion can be further increased as compared with the case where they are simply overlapped.

Further, the size of the pressure contact piece is not limited, and the core wire can be prevented from protruding from the pressure contact piece, and the electrical connection can be reliably achieved.

[Brief description of drawings]

FIG. 1 is a perspective view of a crimp terminal showing an embodiment of the present invention, FIG. 2 is a developed view of the crimp terminal of FIG. 1, and FIG. 3 is a connection of the crimp terminal of the present invention and a high-voltage resistance wire. A front view showing a state, FIG. 4 is a cross-sectional view taken along line AA of FIG. 3, FIG. 5 is a developed view of a conventional crimp terminal, FIG. 6 is a perspective view of a conventional crimp terminal, and FIG. FIG. 4 is a cross-sectional view showing a connection state between a conventional crimp terminal and a high-voltage resistance electric wire. T ... Crimping terminal, 1 ... Holding part, 2 ... Fitting part, 3 ...
Crimping piece, 4 ... Reinforcing piece, 7 ... Resistance wire for high voltage.

Claims (1)

[Scope of utility model registration request] 1. A reinforcing piece, a claw, and a reinforcing piece at an intermediate portion between a holding portion for crimping and fixing a terminal portion of a high-voltage resistance wire of a crimp terminal and a fitting portion for engaging with an electrode or the like of an ignition plug. An integrally formed pressure contact piece is formed, the reinforcing piece is bent and superposed from one end along the shape of the intermediate portion, and the reinforcing piece is fixed to the intermediate portion by the claw at the other end of the intermediate portion at least. A crimp terminal for a high-voltage resistance wire, characterized in that the pressure contact piece is bent in the vicinity of the rear end portion of the holding portion and is positioned substantially at right angles to the axial direction of the terminal.