JP2000277186A - Insulation displacement terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a large contact load even with the conductor of a cable of stranded wire. SOLUTION: This insulation displacement terminal 1 has insulation displacement blades 1f, 1g provided respectively in front and rear positions. Wire-guiding sloped edges 1h are formed at the entrance edges of slots 1d in the insulation displacement blades 1f, 1g in the front and rear positions. An outward edge 1i having a slope at its front is formed at the wire-guiding sloped edge 1h of the insulation displacement blade 1f in the front position and an outward edge 1i having a slope at its rear is formed at the wire-guiding sloped edge 1h of the insulation displacement blade 1g in the rear position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press contact terminal capable of obtaining a large contact load even when a conductor of an electric wire is a stranded wire.

[0002]

2. Description of the Related Art Conventionally, a press-connecting terminal for press-connecting a conductor of an electric wire, for example, an electric wire such as a wire harness for an automobile, has been put into practical use.

As shown in FIG. 6, as the press contact terminal 1 as described above, a box-shaped terminal fitting portion 1a for fitting a male terminal is formed, and both sides rising from both sides of a bottom wall 1b. Some walls 1c are provided with press-contact blades 1e cut and raised inward from the both side walls 1c and having slots 1d between opposing inner edges at front and rear positions. Then, as shown in FIG. 7, the conductor 2b comes into pressure contact with each other between the slots 1d while cutting off the coating 2a of the electric wire 2 with the pressure contact blades 1e at the front and rear positions.

[0004]

However, especially when the conductor 2b of the electric wire 2 is a stranded wire, the stranded wire (element wire) spreads in the vertical direction during crimping and is easily broken, so that it is difficult to obtain a large contact load. There's a problem.

[0005] The present invention has been made to solve the above problems, and an object of the present invention is to provide a press contact terminal capable of obtaining a large contact load even when the conductor of the electric wire is a stranded wire.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a pressure contact terminal provided with pressure contact blades at front and rear positions, wherein a wire guide is provided at an entrance edge of a slot of the pressure contact blade at the front and rear positions. The inclined edge for each is formed, the outward edge having an inclined surface on the front side is formed on the inclined edge for the wire guide of the press contact blade at the front position, and the inclined edge for the wire guide of the press contact blade at the rear position, An object of the present invention is to provide a press contact terminal characterized in that an outward edge having an inclined surface is formed on the rear side.

According to the present invention, outwardly formed edges are respectively formed on the slanted edges for the wire guides of the slots of the press contact blades at the front and rear positions, so that when the wires are inserted into the slots, the covering of the wires at each edge is made. It is easy to cut and the wire can be inserted smoothly. Also, as the coating of the wire is cut at each outward edge, the cut outer coating is pushed outward at each outward edge, and the wire between each outward edge is pulled straight. Since a tension is applied to the conductor, a conductor, particularly a stranded wire as described in claim 4, does not spread in the longitudinal direction and is hardly broken at the time of pressure welding, so that a large contact load can be obtained.

According to a second aspect of the present invention, the press contact blade is turned into a U-turn on the slot side and folded into two pieces, and the inclined portion for the wire guide and the outward edge are formed in the folded portion. Can be adopted.

According to a third aspect of the present invention, the outward edge of the wire guide inclined edge is a point at which the wire coating first comes into contact with the wire guide inclined edge and a point at which the wire conductor first contacts the slot. And a configuration formed in the range.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. Note that the same components and operations as those in the conventional art are denoted by the same reference numerals, and detailed description is omitted.

As shown in FIGS. 1 and 2, the press contact terminal 1 is formed by cutting both sides of the bottom wall 1b inwardly from the both sides of the bottom wall 1b, as in the prior art. Pressing blades 1f and 1g forming a slot 1d between opposing inner edges are provided at front and rear positions.

At the entrance edges of the slots 1d of the press contact blades 1f and 1g at the front and rear positions, inclined edges 1h for electric wire guides are formed at a predetermined angle.

Then, as shown in a partially enlarged view in FIG. 3A, the inclined edge 1h for the wire guide of the press-contact blade 1f at the front position.
An outward edge 1i having an inclined surface on the front side is formed at the same time, and the wire guide inclined edge 1h of the press contact blade 1g at the rear position is formed.
, An outward edge 1i having an inclined surface on the rear side is formed. In other words, the outwardly facing edges 1i are formed on the press contact blades 1f and 1g at the front and rear positions, respectively.

With the above configuration, when the electric wire 2 is inserted into each slot 1d of the press contact blades 1f, 1g at the front and rear positions, as shown in FIG.
The coating 2a of the electric wire 2 is easily cut at each outward edge 1i of 1 g, so that the electric wire 2 can be smoothly inserted.

When the covering 2a of the electric wire 2 is cut at each outward edge 1i, as shown in FIG.
When the cut outer coating 2a is pushed outward by the inclined surface of each outward edge 1i (see arrow B), the reaction force causes the pressing blades 1f and 1g at the front and rear positions to be bent inward. (Refer to the two-dot chain line), the electric wire 2 between the outward edges 1i by the outward restoring force of the press contact blades 1f and 1g at the front and rear positions.
Is pulled straight and tension is applied.

Thus, when the conductor 2b is a stranded wire, the conductor 2 does not spread in the vertical direction during crimping and does not easily collapse, so that a large contact load can be obtained.

Although the pressure contact blades 1f and 1g of the above embodiment have a single blade shape, they are folded into two by making a U-turn at the slot side as in the case of the pressure contact blades 1f and 1 shown in FIG. 3 (b). An inclined edge 1h for electric wire guide and an outward edge 1i can be formed in the folded portion. In this example, even if the press contact terminal 1 is punched and pressed while the base material is tin-plated, the inner edge of the slot 1d remains tin-plated, so that the contact resistance to the conductor 2b should be kept low. Can be.

As shown in FIG. 5 (a), the angle θ1 of the wire guiding inclined edge 1h of the press contact blades 1f and 1g at the front and rear positions is set to 4
If it is larger than 5 degrees, the electric wire 2 can be easily guided in the slot 1d direction, and the electric wire 2 can be inserted smoothly. Also, as shown in FIG. 5B, when the electric wire 2 is inserted and the angle θ2 between the electric wire 2 and the point a where the electric wire 2 comes into contact with the electric wire guide inclined edge 1h is larger than 45 degrees, similarly, the electric wire 2 It is easy to be guided in the slot 1d direction and the electric wire 2
Can be inserted smoothly. Further, as shown in FIG. 5 (c), when the electric wire 2 is inserted with a large deviation from the center of the slot 1d,
If the upper ends of the inclined edges 1h for f and 1g of the electric wire guide are set as curved edges (round edges) 1j, the electric wire 2 will be centered without being damaged.

On the other hand, as shown in FIGS. 5D and 5E, instead of forming the outward edges 1i on all the wire guide inclined edges 1h of the press contact blades 1f and 1g at the front and rear positions, as shown in FIGS. It is formed only in the range between the point b where the coating 2a of the electric wire 2 first contacts the inclined edge 1h and the point c where the conductor 2b of the electric wire 2 first contacts the slot 1d (the end of the inclined edge 1h for electric wire guide). be able to. In this case, since the coating 2a is cut off at the outward edge 1i at the initial stage of the insertion of the electric wire 2 and the conductor 2b is less likely to come into contact with the outward edge 1i, the stranded wire (strand) is less likely to break. .

In the above embodiment, the press contact blades 1f, 1f, which are cut and raised inward from both side walls 1c of the press contact terminal 1, respectively.
Although it was 1 g, it may be a pressure contact blade cut and raised from the bottom wall 1b.

[0021]

As is clear from the above description, the press contact terminal of the present invention is formed by forming outwardly facing edges on the wire guide inclined edges of the slots of the press contact blades at the front and rear positions, so that the electric wire is inserted into the slot. When the wire is inserted, the coating of the wire is easily cut at each edge, so that the wire can be inserted smoothly.

Further, when the covering of the electric wire is cut at each outward edge, the cut outer covering is pushed outward at each outward edge, and the electric wire between each outward edge is straightened. As a result, the conductor, especially a stranded wire, does not spread in the vertical direction and hardly collapses when pressed, so that a large contact load can be obtained.

According to the second aspect, the press contact blade is turned in a U-turn on the slot side and folded into two pieces.
When the inclined edge for the electric wire guide and the outward edge are formed, the inner edge of the slot is in a plated state, so that the contact resistance to the conductor can be kept low.

According to a third aspect of the present invention, the outward edge of the wire guide inclined edge is defined as a point at which the wire coating comes into contact with the wire guide inclined edge first, and a point at which the wire conductor comes into contact with the slot first. When the conductor is formed in the range, the possibility of the conductor being in contact with the outward edge is reduced due to the cut of the covering at the outward edge at the initial stage of the insertion of the electric wire, so that the wire breakage is less likely to occur.

[Brief description of the drawings]

1A and 1B are press-contact terminals of the present invention, in which FIG. 1A is a perspective view in a state of being divided in a width direction, and FIG.

FIG. 2A is a plan view of a press contact terminal, and FIG.
FIG. 4 is a sectional view taken along line AA of FIG.

FIGS. 3A and 3B are enlarged perspective views of the press contact blade.

FIGS. 4A and 4B are side views of a process of pressing the electric wire by the pressing blade.

5A to 5C are cross-sectional views of a modification of the press contact blade, respectively, and FIG. 5D is a perspective view of a modification of the outward edge.
(E) is a front sectional view of a main part of (d).

FIG. 6 is a conventional press contact terminal, (a) is a perspective view,
(B) is a plan view.

FIG. 7 is an enlarged sectional view taken along line BB of FIG. 6 (b).

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 pressure contact terminal 1 d slot 1 f pressure contact blade at front position 1 g pressure contact blade at rear position 1 h inclined edge for electric wire guide 1 i outward edge 2 electric wire 2 a coating 2 b conductor

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Yasushi Saito 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi F-term in Harness Research Institute, Inc. (reference) 5E012 AA14

Claims (4)

[Claims] 1. A press contact terminal provided with press contact blades at front and rear positions, wherein an inclined edge for electric wire guide is formed at an entrance edge of a slot of the press contact blade at the front and rear position, and the electric wire of the press contact blade at a front position is provided. An outward edge having an inclined surface on the front side is formed on the inclined edge for guide, and an outward edge having an inclined surface on the rear side is formed on the inclined edge for electric wire guide of the press-contact blade at the rear position. A pressure contact terminal. 2. The pressure contact blade according to claim 1, wherein the press contact blade is turned into a U-turn on the slot side and folded into two pieces, and the folded edge is formed with the inclined edge for the wire guide and the outward edge. The crimp terminal described. 3. The outward edge of the wire guide inclined edge is formed in a range between a point at which the wire coating first contacts the wire guide inclined edge and a point at which the wire conductor first contacts the slot. The press contact terminal according to claim 1 or 2, wherein the press contact terminal is provided. 4. The conductor of the electric wire is a stranded wire.
The press contact terminal according to claim 3.