JP3153085B2 - Terminal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal device for holding an electric wire by a lock spring used for a circuit breaker for wiring, a ground fault circuit breaker, a switch, and the like.

[0002]

2. Description of the Related Art A conventional terminal device for holding an electric wire by a locking spring fixes a base of a terminal seat 21 formed by bending a metal plate to a base A with screws 31 as shown in FIGS. A lock spring 23 for urging the electric wires 25 such as the electric wire 25 and the branch bar 26 inserted below the terminal seat 21 toward the terminal seat 21 and an unlocking lever 27 are provided. Was.

[0003]

However, in such a conventional terminal device, the contact pressure with the terminal seat 21 changes when the branch bar 26 is deformed upward or downward as shown by a chain line in FIG. In addition, when the wires are repeatedly shrunk and expanded slightly due to the temperature difference between day and night, the wires and the like and the terminal seat 21 are rubbed, which causes an increase in contact resistance. The present invention solves such conventional problems, and provides a terminal device in which the contact pressure with the terminal seat does not change even when the wires vibrate, contract, or expand, and the contact resistance does not increase. It was done in.

[0004]

According to the present invention, a terminal seat is divided into a seat portion attached to a base and a plate-shaped terminal portion on which electric wires are pressed by a locking spring. Characterized in that they are connected by an electrically conductive material.

[0005]

In the terminal device of the present invention, first, the release lever is operated to press the lock spring downward, the wires are inserted between the lock spring and the lower surface of the terminal portion, and then the lock spring is moved downward. Is released, and the wires are held between the lower surface of the terminal portion and the wires by the elastic force of the locking spring, as in the conventional case.

However, in the terminal device of the present invention, the terminal seat is divided into a terminal portion and a seat portion, and the two are connected by a flexible conductive material. If the terminal is deformed, the terminal moves up and down with the wires, and there is no problem that the contact pressure changes. Further, even if the electric wires repeatedly shrink and expand minutely due to the temperature difference between day and night, the terminal portions also move back and forth with them, so that they do not rub against each other, and there is no possibility of increasing the contact resistance.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to an embodiment of a terminal device of a circuit breaker shown in FIGS. Reference numeral 1 denotes a terminal seat attached to a base A having a cover B with a seat 1a. The terminal seat 1 has a plate-shaped terminal 1b facing an electric wire insertion port 2 provided in the base A, and a seat 1a. Both ends of the terminal portion 1b are loosely fitted into grooves formed in the partition wall portion of the base A. The terminal 1b and the seat 1a are connected by a flexible conductive material 3. As the flexible conductive material 3, a stranded wire 3a is used in the first embodiment shown in FIGS. 1 to 3, and both ends of the stranded wire 3a are connected to the upper surface of the base end of the terminal portion 1b and the upright portion of the seat portion 1a. It is welded to the tip of the upper part 4.
Further, in the second embodiment shown in FIG. 4, a phosphor bronze plate 3b is used as the flexible conductive material 3, and both ends thereof are formed on the base upper surface of the terminal portion 1b and the tip of the rising portion 4 of the seat portion 1a. Welded to. The flexible conductive material 3 may be a plate-like material or an inverted U-shaped band-like spring plate material.

Reference numeral 5 denotes a band-shaped locking spring, which is provided with a locking hole 7 in the front plate portion, into which the terminal portion 1b and the wires 6 can be loosely fitted. The locking spring 5 of the embodiment is formed in an inverted U shape.
The rear plate portion is fixed to the rising portion 4 of the seat portion 1a of the terminal seat 1 by means such as welding or screwing, so that the front plate portion is constantly urged upward. The distal end side of the terminal portion 1b is inserted into the lock hole 7,
Normally, the lower edge of the locking hole 7 is pressed against the lower surface of the terminal portion 1b under the elasticity of the locking spring 5. However, the structure of the locking spring 5 is not limited to this.

Reference numeral 8 denotes a concave step portion which becomes a relief portion when the front plate portion of the locking spring 5 provided on the bottom surface of the base A is pushed down. Reference numeral 9 denotes a release lever provided above the lock spring 5 so as to be able to move up and down. Reference numeral 10 denotes a contact provided on the seat 1a of the terminal seat 1.

In order to use the above structure, first, the release lever 9 is operated to press the front plate of the locking spring 5 downward, so that the lower end edge of the locking hole 7 and the terminal 1b. And a lower surface of the wire to form an electric wire insertion space. Next, the electric wires 6 are inserted into the electric wire insertion space through the electric wire insertion port 2 provided in the base A.
1 and 2, the release lever 13 is tilted down as shown in FIGS. 1 and 2, and the downward pressing of the locking spring 5 is released, so that the lower end of the locking hole 7 and the lower surface of the terminal portion 1 b are released. Wires 6
Are sandwiched and connected.

Even when the connected electric wires 6 are deformed upward or downward, the contact pressure by the locking spring 5 does not change because the terminal portion 1b slightly moves along with the electric wires 6. Further, even if the wires 6 repeatedly shrink and expand slightly due to the temperature difference between day and night, the terminal portions 1b can also slightly move in the shrinking and expanding directions accordingly, so that the wires 6 do not rub against the terminal portions 1b. There is an advantage that there is no fear of increasing the contact resistance.

[0012]

As is apparent from the above description, the present invention divides a terminal seat into a terminal portion and a seat portion, and connects the terminal portion and the seat portion with a flexible conductive material. Therefore, even when the connected electric wires are deformed upward or downward, there is no possibility that the contact pressure changes or the contact resistance increases. Therefore, the present invention greatly contributes to the industry as a solution to the problem of the conventional terminal device.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a first embodiment of the present invention.

FIG. 2 is a partially cutaway front view showing the first embodiment of the present invention in different modes.

FIG. 3 is a perspective view showing a main part of the first embodiment of the present invention.

FIG. 4 is a perspective view showing a main part of a second embodiment of the present invention.

FIG. 5 is a partially cutaway front view showing a conventional example.

FIG. 6 is a partially cutaway front view showing a conventional example in different modes.

[Explanation of symbols]

 Reference Signs List A Base B Cover 1 Terminal seat 1a Seat 1b Terminal 2 Wire insertion opening 3 Flexible conductive material 5 Lock spring 6 Wires 7 Lock hole

Claims (3)

(57) [Claims] 1. A terminal seat (1) comprising: a seat (1a) attached to a base (A); and a plate-shaped terminal (1b) on which electric wires (6) are pressed by a locking spring (5). A terminal device characterized in that the terminal device is divided into two, and the two are connected by a flexible conductive material (3). 2. The terminal device according to claim 1, wherein the flexible conductive material is made of a stranded wire. 3. The terminal device according to claim 1, wherein the flexible conductive material is made of a spring plate.