JPH0160441U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of an arc extinguishing device according to an embodiment of this invention, FIG. 2 is a plan view of FIG. 1, and FIG.
Figure 4 is a plan view of an arc extinguishing device according to another embodiment of the invention, Figure 4 is a partial cross-sectional side view of a circuit breaker equipped with a conventional arc extinguisher, and Figure 5 is the same as that shown in Figure 4. FIGS. 6 and 7 are plan views of conventionally proposed arc extinguishing devices, respectively. In the figure, 2 and 3 are opening/closing contacts, 4 is an arc extinguishing device, 401A is an arc extinguishing plate, and 403A is an arc extinguishing plate 401
404A is the inner edge of the leg 403A, 1
0 is an insulating plate. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] An arc extinguishing device for a circuit breaker, which is disposed opposite to a pair of switching contacts and extinguishes an arc generated between the switching contacts when current is cut off, and has an opening on the switching contact side. A plurality of approximately U-shaped arc extinguishing plates are held in a stacked relationship with spaced apart from each other, and the inner edge of at least one of the legs of the arc extinguishing plates is located at the inner edge of the arc extinguishing plate at a distance from the inlet of the arc extinguishing device. An arc extinguishing device for a circuit or breaker, characterized by having an incline laterally and outwardly toward the side, and an insulating plate made of a resin material provided on the inner edge of the insulating plate.