JPS5853007Y2 - Fuse - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a fuse, and more particularly to a fuse having a structure that reduces assembly time.

As shown in Figures 1 and 2, a conventional current-limiting fuse is constructed by wrapping a connecting plate 2 around a porcelain frame 1 and fixing it using copper wire 3, and then wrapping a fuse element 4 around the porcelain frame 1 by wrapping both ends of the fuse element 4 around the porcelain frame 1. The current-carrying parts 5 were manufactured by soldering them to the connection plates 2, respectively.

FIG. 3 shows a fuse assembled using this current-carrying part 5.

That is, it has a structure in which a current-carrying part 5 is placed in the center of an insulating cylinder 6 and an arc-extinguishing agent 7 is filled around it.
The fuse element 4 and the cap 8 are electrically connected via the connection plate 2 by sandwiching the fuse element 4 between the outer surface of the cap 8 and the inner surface of the conductive cap 8, and pouring solder 9 into this portion.

However, the above-mentioned structure has the drawback that when fixing the connecting plate 2 to the porcelain frame 1, it is necessary to wind the copper wire 3, which takes time.

The object of the present invention is to eliminate the above-mentioned drawbacks and to obtain a fuse with a structure that requires fewer parts and can be operated in a short time.

This will be explained below with reference to the drawings.

FIG. 4 is a developed view of the connecting plate of the present invention, which has a comb-like shape, with a tongue part 12 and a hole 13 in the wrapped part 11, and a plurality of band-shaped connecting parts 14 from the wrapped part. It's growing.

Figures 5a and 5l) show a porcelain frame 15 of the present invention, in which notches A are provided on both sides of the land portion of the protrusion.

The current-carrying part of the present invention connects the connection plate 10 shown in FIG. 6 to the porcelain frame 15.
After wrapping the winding part 11 of the connecting plate 10 around the notch A of the winding part, inserting the tongue part 12 of the winding part into the hole 13 of the winding part and folding back the tongue part 12, the connecting plate 10 can be assembled into a porcelain frame. Fixed at 15.

This state is shown in FIG. Next, the fuse element 4 is wound around the porcelain frame 15, and both ends of the fuse element 4 are soldered to the connection plate 10 to form a current-carrying part.

The structure for assembling the connecting portion 14 of the connecting plate 10 by sandwiching it between the cap and the insulating cylinder and soldering is the same as the conventional one.

As described above, the structure of the fuse of the present invention eliminates the need for copper wire and the work of winding the copper wire, thereby reducing material costs and shortening the working time, which has the advantage of being economical.

In Figure 5, there are four notches A on each side of the porcelain frame, but if there is one or more, the connecting plate can be fixed, so it is not necessarily necessary to have four notches A, and there are four lands on the protrusions of the porcelain frame. It is not limited to 6 pieces.

[Brief explanation of drawings]

Fig. 1 is a front view showing the current-carrying part of a conventional fuse, Fig. 2 is a side view of Fig. 1, Fig. 3 is a sectional view showing the structure of the conventional fuse, and Fig. 4 is a fuse of the present invention. FIG. 5A is a front view of the porcelain frame, FIG. 5A is a side view of FIG. The figure is a cross-sectional view taken along the line AA in FIG. 6, showing a state in which the connection plate is wound around the porcelain frame. 1...Porcelain frame, 2...Connection plate, 3...
...Copper wire, 4...Fuse element, 5
...... Current carrying part, 6... Insulating tube, 7...
... Arc quenching agent, 8 ... Cap, 9 ...
・Solder, 10... Connection plate, 11... Winding part of the connection plate, 12... Tongue part of the connection plate, 13.
... Hole of the connection plate, 14 ... Connection part of the connection board, 15 ... Porcelain frame.

Claims (1)

[Scope of utility model registration request] A fuse element is wound around a porcelain frame, a notch is provided on both sides of the land of the protrusion of the porcelain frame, and a comb-shaped connecting plate is wound around this notch. A fuse characterized in that elements are connected, a band-shaped connecting portion of the connecting plate is bent and fixed to the porcelain frame, and the bent portion is sandwiched and fixed between a cap and an insulating tube.