JP2855369B2 - ID terminal - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press contact terminal for press-fitting an uncovered electric wire into a U-shaped slot for connection.

"Prior art" The press contact terminal presses the uncovered wire into the press contact blade consisting of a U-shaped slot that opens upward, cuts the wire coating with the edge of the press contact blade, and connects the wire conductor to the press contact blade. The U-shaped slot width is formed in a variety of sizes, and the one corresponding to the wire diameter is selected from among them. Those having the same slot width are used.

On the other hand, there is an improved pressure contact terminal which can be commonly used for a plurality of large and small wire diameters as disclosed in Japanese Patent Application Laid-Open No. 56-7364. This pressure contact terminal is formed by forming a U-shaped slot into a deep groove and contracting it in the middle. It is formed as a two-stage slot having a width portion, and is adapted to press-connect a plurality of small and large diameter wires.

[Problems to be Solved by the Invention] Since the above-described conventional press-contact terminals need to prepare and selectively use press-contact terminals having different shapes for each wire diameter, a wire harness for automobiles composed of hybrid wires of various diameters is required. When a press-connecting connector or press-joint joint connector is used, there are practical difficulties in that the management of the press-connecting terminals is complicated and the cost is increased due to various types of molding, and the latter improved two-stage slot structure has There is a problem that the size of the connector is increased due to the height of the press contact terminal.

An object of the present invention is to provide a press-connecting terminal which solves the above-mentioned conventional problems.

Means for Solving the Problems The press contact terminal of the present invention for solving the above technical problem is a press contact terminal made of a single plate material having a uniform thickness and provided with a U-shaped slot having an upper opening, The U-shaped slot extends from the upper end to the lower end.
An elongated hole-shaped flexing cavity parallel to the U-shaped slot is formed by punching, and a side edge of the U-shaped slot has an elastic rigid frame structure, and a terminal frame portion via the flexing cavity. And the width of the terminal frame portion opposed to the terminal frame portion via the bending gap portion is wider than the width of the press contact portion.

[Operation] The press contact terminal of the present invention having the above configuration is divided into a press contact portion having an elastic rigid frame structure and a terminal frame portion forming an outer frame of the press contact portion by a flexing gap parallel to the U-shaped slot. Therefore, the peripheral wall portion of the U-shaped slot expands and flexes in the direction of the flexure cavity to receive the electric wire according to the press-fit resistance based on the diameter of the electric wire press-fitted into the U-shaped slot, and receives the electric wire. Moment (reaction force moment generated at the fixed end of the ramen) and the reaction force due to the bulging flexure are combined to strongly press the pressure wires, so that wires with a wide range of diameters are press-fitted and good electrical press-fit connection is performed. You can get the status.

Since the width relationship between the terminal frame portion and the press-contact portion has the above-described requirements, the mechanical strength structure of “the rigidity of the terminal frame portion in the plate width direction> the rigidity of the press-contact portion in the plate width direction” is obtained. Since most of the press-fitting resistance is absorbed by the press-contact portion, the basic shape of the terminal can be stabilized and the above-described press-contact action by the U-shaped slot can be stably enjoyed.

"Example" Hereinafter, a detailed description will be given based on an example. First, referring to FIG. 1 showing a first embodiment of the present invention, a U-shaped one-sided opening made of a single plate material having a uniform thickness and having a wire insertion guide portion 3 in the center thereof. In the press contact terminal 1 provided with the U-shaped slot 2, a bending gap 6 surrounding the side edge 4 and the bottom 5 of the U-shaped slot 2 is punched and formed, and the U-shaped slot is formed through the bending gap 6. The pressure contact portion 7 is a central portion whose main part is 2 and a terminal frame portion 8 which forms an outer frame of the pressure contact portion 7.

That is, the flexure gap 6 forms a long slot with a uniform hole width B sufficient to absorb the bulging flexure of the press contact portion 7 generated when the electric wire is pressed into the U-shaped slot 2. The slot 2 is parallel to the edge 4 of the slot 2 with a plate width A and surrounds the bottom 5 from the upper end of the U-shaped slot 2.

The press contact portion 7 partitioned via the flexure gap 6 is integrally joined to the terminal frame portion 8 at the upper end portion of the flexure gap 6, and the joint 9 is a fixed end. It has an elastic rigid frame beam structure.

The plate width C of the terminal frame portion 8 forming the outer frame of the press contact portion 7 satisfies the shape requirement of “plate width C> plate width A” which is wider than the plate width A of the elastic rigid frame beam of the press contact portion 7. In addition, the mechanical strength structure is such that “the bending rigidity of the terminal frame portion 8 in the width direction of the terminal> the bending rigidity of the press contact portion 7 in the width direction”.

When the electric wire 10 is press-fitted into the U-shaped slot 2, the side edge 4 of the U-shaped slot 2, which forms an inverted gate-shaped elastic frame, is bent by the press-fitting resistance. And elastic deformation occurs, and a rotational moment peculiar to the elastic rigid frame is generated at the joint 9 of the fixed end, so that the side edge portion of the U-shaped slot 2 absorbs the stress due to the press-fitting resistance, and The input electric wire 10 is pressed and clamped by the combined force of the bending moment of the fixed end of the above and the bending reaction force due to the bulging deflection. Therefore, as shown in FIGS. 1 (B) to 1 (D), a wide range of small-diameter wires such as the small-diameter wire 10C, the medium-diameter wire 10B, and the large-diameter wire 10A are received and pressure-welded to obtain a good electrical pressure-welding connection state. be able to.

Since the above-mentioned “plate width C> plate width A” has the mechanical characteristics “rigidity of terminal frame portion 8> rigidity of press-contact portion 7” due to the shape requirement of “plate width C> plate width A”, the pressure due to the press-in resistance of electric wire 10 is large. The portion is absorbed by the pressure contact portion 7, and the deformation displacement of the terminal frame portion 8 hardly occurs, the unnecessary opening deformation of the U-shaped slot 2 is prevented, the terminal posture is not broken, and the U-shaped The stable shape characteristics of the throat 2 are maintained.

When the practicable wire diameter zone in the embodiment of FIG. 1 was confirmed, it was found that wires in a wide range of cross-sections of about 0.6 to 2.1 mm ² exhibited a stable pressure-welded connection state and were practicable in an automobile wire harness. Was confirmed.

Next, FIG. 2 shows a second embodiment of the present invention.
In the second embodiment, a pair of long slots is formed in the U-shaped slot 2 in parallel with both side edges 4 of the bending gap 6 for bending, and the press contact portion 7 partitioned by the bending gap 6 has an upper end. The lower end and the lower end are integrally joined to the terminal frame portion 8, and the joint portion is a fixed end, and has a pair of opposing elastic frame members having a plate width A. The width C of the terminal frame portion 8 satisfies the same shape requirement of “C> A” as in the above embodiment, and the “terminal frame portion 8”
Bending rigidity in the plate width direction> Bending rigidity in the plate width direction of the press-contact portion 7 ". The embodiment of FIG. 2 has an operation similar to that of the embodiment of FIG.

In the above-described configuration of the present invention, the flexing gap 6 is preferably long enough to vertically extend above and below the upper and lower ends of the U-shaped slot 2 from the technical intention, but at least near the upper and lower ends of the slot 2. What is necessary is just to have the length which reaches.

[Effects of the Invention] As described above, the press contact terminal of the present invention has excellent press contact performance that can be used for wires of a wide range of diameters without raising the height, and is extremely useful as a connector for automobile wire harnesses. It is useful and has an effect of promoting simplification of terminal management and reduction of connector cost.

[Brief description of the drawings]

FIG. 1 shows a press contact terminal of the first embodiment of the present invention, wherein (A) is a front view thereof, (B), (C) and (D) are front views showing an operation state thereof, and (E) is a use state thereof. FIG. 2 is a perspective view of the connector, FIG. 2 is a front view of the press contact terminal according to the second embodiment of the present invention, reference numeral 1, press contact terminal, 2: U-shaped slot, 3: press-in guide portion,
4: Side edge of U-shaped slot, 5: Bottom of U-shaped slot, 6: Flexure gap, 7: Pressure contact, 8: Terminal frame, 9: Joint point, 10: Electric wire

Claims (1)

(57) [Claims] 1. A pressure contact terminal made of a single plate material having a uniform thickness and provided with a U-shaped slot having an upper opening, wherein the U-shaped slot extends substantially from an upper end to a lower end thereof and is parallel to the U-shaped slot. A slot for bending in the form of an elongated hole is punched and formed, and a side edge of the U-shaped slot is partitioned into a pressure contact portion having an elastic rigid frame structure and a terminal frame portion via the gap for bending, and A pressure contact terminal having a structure in which a plate width of the terminal frame portion opposed to the terminal frame portion via a bending gap portion is wider than a plate width of the pressure contact portion.