JPH0650651B2 - Terminal structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a structure of a terminal of a wiring device such as an outlet or a switch.

BACKGROUND ART Conventional terminals include a winding tightening terminal in which a terminal screw is simply screwed into a terminal plate and a flat washer pressing terminal in which a terminal screw is screwed into a terminal plate via a flat washer. However, the winding-fastened terminal has a drawback that it takes time to wind the electric wire around the terminal screw and connection takes time. Further, the flat washer clamp terminal cannot fix electric wires with different diameters at the same time, and there is a drawback that it is impossible to feed wires with different diameter electric wires.

[Object of the Invention] The present invention has been made in view of the above-mentioned points, and an object of the present invention is to connect an electric wire only by pinching the electric wire between a washer and a terminal plate and tightening a terminal screw. An object of the present invention is to provide a terminal structure which can improve the connection workability and can also securely attach different-diameter electric wires at the same time and improve the contact reliability.

DISCLOSURE OF THE INVENTION In the terminal structure of the present invention, rising edges 2 are provided on both sides of a rectangular terminal plate 1, and a washer 3 having an inverted V-shaped cross section is provided above the terminal plate 1.
And the terminal screw 4 is inserted into the through hole at the substantially center of the washer 3 and the tip of the terminal screw 4 is screwed into the screw hole 5 at the substantially center of the terminal plate 1 to connect the terminal plate 1 and the rising edge 2. The inclined ribs 6 are provided at the inner corners of the spaces, and the drawbacks of the conventional example are solved by the configuration described above. That is, since the terminal plate 1, the washer 3 and the terminal screw 4 are used, the electric wire 7 is sandwiched between the terminal plate 1 and the washer 3 and the terminal screw 4 can be simply tightened to improve the connection workability. Moreover, since the rising edges 2 are provided on both sides of the terminal plate 1, the inclined ribs 6 are provided at the inner corners of the rising edges 2, and the washer 3 has an inverted V-shaped cross section, the electric wires 7 are formed at the rising edges 2. In addition, the washer 3 and the slanted rib 6 can prevent the protrusion of the wire, and the wire with different diameters can be surely attached at the same time to improve the contact reliability.

Hereinafter, the present invention will be described in detail with reference to Examples.

A screw hole 5 is bored substantially in the center of the rectangular terminal plate 1, rising edges 2 are provided on both sides of the terminal plate 1, and cutting pieces 9 that stand vertically are provided at both ends of the terminal plate 1. It is provided. The rising edge 2 is slightly inclined so as to go outward as it goes upward, and an inclined rib 6 is provided at an inner corner between the rising edge 2 and the terminal board 1, and the inner surface of the inclined rib 6 is increased upward. It is a slope that goes outward. The washer 3 arranged on the terminal plate 1 has an inverted V-shaped cross section, a through hole is bored at substantially the center of the washer 3, and notches 8 are provided at both ends of the washer 3 and the notch 8 is formed. It is engaged with the cut-and-raised piece 9. The terminal screw 4 is screwed into the screw hole 5 of the terminal plate 1 through the through hole of the washer 3. Then, with the terminal screw 4 loosened, the washer 3
The electric wire 7 is inserted between the terminal plate 1 and the terminal plate 1, and the terminal screw 4 is tightened to clamp the electric wire 4 between the washer 3 and the terminal plate 1. At this time, the electric wire 7 is prevented from coming off at the rising edge 2, and the terminal screw 7 is tightened to press the washer 3 having an inverted V-shaped cross-section so that the inner surface of the inclined rib 6 is prevented as shown in FIG. There is no risk that the electric wire 7 will be pushed inward along the wire 7 and come off. In the case of an IV electric wire, etc., in order to facilitate the forming of the electric wire 7, as shown in FIG.
Cut the covering part 7b so that it is exposed for a long time, attach it to the terminal board 1 and connect it, then turn the tip of the conductor part 7a as shown by the arrow a to turn it off. The electric wire 7 does not stick out or come off. Also, as the electric wire 7, when a large-diameter electric wire A and a small-diameter electric wire B are simultaneously connected and feed wiring is performed, the connection can be made as shown in FIG.
That is, when the terminal screw 4 is tightened, the head of the terminal screw 4 presses the apex of the washer 3 and the washer 3 can be slightly rotated, so that θ
Rotate by the angle of and hold down both wires A and B. In this case the washer 3 is the contact portion 10 of the lower surface and the washer 3 of the head of the terminal screw 4 becomes substantially the center of the head, and the wire A, and ₁ ≒ ₂ for accommodating the position of B is restricted by the inclined rib 6 Become. Therefore, the force by which the washer 3 presses the wires A and B becomes F ₁ ≈ F _{2 and a} reliable connection can be made (in the case of the flat washer clamp terminal, the washer does not rotate, so F ₁ ≈ F ₂ does not hold).

[Effects of the Invention] Since the present invention has the terminal plate, the washer, and the terminal screw as described above, it is possible to make a connection simply by sandwiching an electric wire between the terminal plate and the washer and tightening the terminal screw to improve the connection workability. What can be done, of course, has rising edges on both sides of the terminal board, so that the electric wires are prevented from protruding by the rising edges and the electric wires are securely connected so as not to come off, and the contact reliability is improved. Moreover, since there is an inclined rib at the inner corner of the rising edge and the washer has an inverted V-shaped cross section, tightening the terminal screw causes the washer and the inclined rib to move inward so that the wire does not come off further. It is possible to further improve the contact reliability, and further, an inclined rib provided in the inner corner between the terminal plate and the rising edge,
Since both of the washers having an inverted V-shaped cross section are provided, the inclined ribs bring the electric wire inward, and the apex of the washer comes into contact with the lower surface of the head of the terminal screw so that the washer can rotate a little. Due to
Even when different-diameter electric wires are connected to both sides of the terminal screw for feed wiring, the washer contacts the electric wires on both sides with substantially the same force, and even when the feed wiring of different-diameter electric wires is performed, reliable connection can be achieved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention, FIG. 2 is a front view showing a state in which electric wires are connected, FIG. 3 is a perspective view for explaining a connected state of other electric wires in the same, and FIG. It is a front view of a state in which different-diameter electric wires are connected, and 1 is a terminal plate, 2 is a rising edge, 3 is a washer, 4 is a terminal screw, 5 is a screw hole, and 6 is an inclined rib.

Claims (1)

[Claims] 1. A terminal screw having a rectangular-shaped terminal plate provided with rising edges on both sides, a washer having an inverted V-shaped cross section is arranged above the terminal plate, and the terminal screw is inserted into a through hole at a substantially central portion of the washer. The terminal structure is characterized in that the tip of the screw is screwed into a screw hole at the substantially center of the terminal plate, and an inclined rib is provided at an inner corner between the terminal plate and the rising edge.