JPS58928Y2 - Setsuzokutanshi - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a connecting terminal used in an electromagnetic contactor or the like.

When wiring electric wires or crimp terminals to terminals such as electromagnetic contactors, a holding plate is used to hold and tighten these electric wires or crimp terminals.

This holding plate with a chevron-shaped cross section is more effective in preventing the wires from protruding from the holding plate than a flat plate when wiring wires without terminal treatment with crimp terminals, etc. Widely used.

1 to 3 show conventional examples of the above-mentioned connection terminals, 1 is a conductor of a device, 2 is a terminal board attached to a wiring conductor from an external device, and 3 is a terminal board 2 attached to a conductor. The holding plate 4 is a screw that penetrates the terminal plate 2 and the holding plate 3 and fastens the holding plate 3 to the conductor 1.

3a is a through hole through which the tightening screw 4 passes; 3b is a recess formed by pressurizing a part of the surface of the holding plate 3; and 3C is a convex portion formed on the back surface by the above pressurization.

The conventional connection terminal is constructed as described above, and the convex portion 3C on the back surface of the holding plate 3 is provided to increase the contact area when pressing the terminal plate 3, but it is difficult to contact the conductor 1 of the device. If the tightening screws 4 are strongly tightened to ensure sufficient contact pressure with the terminal plate 2, there is a risk that the retaining plate 3 will exceed its elastic limit and cause permanent distortion.To prevent this, heat treatment is performed. However, this resulted in less elongation and the risk of cracking.

The purpose of this invention is to improve the above-mentioned drawbacks, and to provide a connection terminal equipped with a holding plate that does not cause permanent strain due to tightening, even without heat treatment.

An embodiment of this invention will be described below with reference to FIGS. 4 to 6.

In FIGS. 4 to 6, the same reference numerals as in FIGS. 1 to 3 indicate the same or corresponding parts, 5 is a holding plate, 5a is a through hole through which the tightening screw 4 passes, and 5b is the surface of the holding plate 5. The concave portion 5C is a convex portion formed on the back surface due to the above pressure, and the cross-sectional shape of the presser plate 5 is a double chevron shape with the central part of the chevron concave as shown in Fig. 6. The lower surface 5d of the central portion is formed to have a gap of one dimension between it and the bottom surface.

With the structure described above, when the tightening screw 4 is tightened, the lower part 5d of the central part contacts the terminal board 2 within the elastic limit, and the terminal board 2 is held at three locations: the convex part 5C and the lower surface 5d of the central part. Press,
Even if the presser foot 5 is tightened with the necessary tightening pressure, the amount of further displacement of the presser foot 5 is small, so that permanent strain will not occur due to tightening.

As described above, by using the holding plate of this invention, the number of places where the holding plate presses the terminal board increases from 2 to 3, so the contact state between the conductor and the terminal board is stable, and the necessary Since the presser plate does not undergo permanent strain even if a certain amount of tightening pressure is applied, heat treatment that may cause cracks or the like can be omitted.

[Brief explanation of drawings]

Figures 1 to 3 show conventional examples, with Figure 1 being a front view and Figure 2 being a front view.
The figure is a plan view of the presser foot, FIG. 3 is a sectional view of the presser foot III in FIG. 2, FIGS. 4 to 6 show an embodiment of this invention, FIG. The plan view of FIG. 6 is VI
-VI sectional view. In the drawings, the same symbols indicate the same or corresponding parts,
1 is a conductor, 2 is a terminal plate, 4 is a tightening screw, and 5 is a holding plate.

Claims (1)

[Scope of utility model registration request] In a connection terminal consisting of a conductor, a holding plate, and a tightening screw that passes through the holding plate and is screwed into the conductor, both sides of the holding plate and the penetration portion of the tightening screw protrude toward the conductor. A connecting terminal characterized in that the cross section of the holding plate is formed into a nil shape.