JPH09102262A - Earth leakage breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth leakage breaker which is easy of assembly and can lower the manufacture cost. SOLUTION: An earth leakage detecting unit 6 is housed in the insulating space 3 made under the terminal metal fitting 2 of the case body 1. Moreover, one part of the terminal metal fitting 2 is directly connected to the substrate 6b of the earth leakage detection unit 6, being extending downward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth leakage breaker, and more particularly to connection between an earth leakage detection unit of an earth leakage breaker and its power source.

[0002]

2. Description of the Related Art As shown in FIG. 2, a leakage detecting unit 21 of a conventional leakage breaker is installed below a terminal fitting 22 for wiring connection so as not to be broken by short circuit between electrodes and pressure at the time of short circuit. It was arranged in the formed insulating space 23, and its power source was taken from the terminal fitting 22 by the lead wire 24.

[0003]

However, in such a conventional device, in order to connect the lead wire 24 to the terminal fitting 22 and the board 21a of the earth leakage detection unit 21, the terminal fitting 22 is required.
The lead wire 24a on the terminal side is spot-welded to the lead wire 24a, and the lead wire 24b on the leakage detection unit side is soldered to the substrate 21a. Since it is connected by the terminal 25, it takes a lot of time for processing and routing of the lead wire, which is a bottleneck in the assembling work. The present invention has been made to solve the above-mentioned conventional problems and provide an earth leakage breaker that can be easily assembled and can reduce the manufacturing cost.

[0004]

The earth leakage breaker of the present invention, which has been made to solve the above-mentioned problems, extends downward a part of a terminal fitting for wiring connection provided at an end of a case body, It is characterized in that it is directly connected to the substrate of the earth leakage detection unit housed in the insulating space below the terminal fitting.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the best mode for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 shows an essential part of an earth leakage breaker of the present invention. Reference numeral 1 is a case body made of a synthetic resin material, and 2 is a terminal fitting for connecting wiring on a load side provided at one end of the case body 1. It is 2. Reference numeral 3 denotes an insulating space portion formed below the terminal fitting 2, and the insulating space portion 3 is formed by a recess 4 formed below the case body 1 and a bottom plate 5 closing the lower end of the recess 4. There is.

Reference numeral 6 is an earth leakage detection unit housed in the insulating space 3. The leakage detection unit 6 amplifies the leakage current sensed by the leakage detection element 7 and sends it to the trip device 8. This earth leakage detection unit 6 requires a power supply for operation, but in the present invention, the leg plate portion 2a of the terminal fitting 2 for wiring connection described above is extended downward, and the lower end portion thereof is the substrate 6a of the earth leakage detection unit 6. And is soldered to the lower surface of the substrate 6a to be directly connected to the printed wiring of the substrate 6a or a wiring portion such as an electric wire.

In the earth leakage breaker of the present invention thus constructed, the earth leakage detecting unit 6 is housed in the insulating space portion 3 below the terminal fitting 2, so that it is destroyed by the short circuit between electrodes and the pressure generated at the time of short circuit. It is the same as the conventional one in that there is no fear of doing so.

Moreover, the connection work by soldering the lower end portion of the leg plate portion 2a of the terminal fitting 2 and the board 6a of the electric leakage detection unit 6 can be easily performed by removing the bottom plate 5 of the case body 1. Assembling can be carried out very easily without the need for arranging lead wires. Since the leg plate portion 2a of the terminal fitting 2 is formed by bending a conductive plate material such as copper or brass, it also has a function as a supporting leg, and the insulating space portion 3 has a board 6a of the earth leakage detection unit 6. Can be held accurately.

[0009]

As is apparent from the above description, according to the present invention, a part of the terminal fitting is extended downward and directly connected to the substrate of the earth leakage detection unit, so that the assembling work can be performed very easily. Further, since the lead wire unlike the conventional one is not required, the manufacturing cost can be reduced. Therefore, the present invention is a great solution to the industry by solving the problems of the conventional earth leakage breaker.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing a preferred embodiment of the present invention.

FIG. 2 is a partially cutaway side view showing a conventional example.

[Explanation of symbols]

 1 Case Main Body 2 Terminal Metal Fitting 2a Leg Plate 3 Insulation Space 6 Leakage Detection Unit 6a Board

Claims (1)

[Claims] 1. A terminal metal fitting (2) provided at an end portion of a case body (1) for connecting a wire, which is partially extended downward to form a terminal metal fitting.
An earth leakage breaker characterized by being directly connected to a board (6a) of an earth leakage detection unit (6) housed in an insulating space (3) below (2).