JPS61179689U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway sectional view of a lightning arrester device according to an embodiment of the present invention, Fig. 2 is a front view of a detonator used in the above embodiment, and Fig. 3 is a detonator used in the above embodiment. Figure 4 shows the lightning arrester, Figure 4 shows the insulating thin film used in the above example, Figure 5 shows the fuse used in the example above, and Figure 6 shows the metal used in the example above. Diagram showing the cap, No. 7
The figure shows a holding clip used in the above embodiment, Fig. 8 shows a pressure spring used in the above embodiment, and Figs. 9 and 10 respectively show a conventional lightning arrester device. It is. 10...discharge tube, 11...ground electrode, 12...
Insulating ring, 13... Main electrode, 20... Lightning arrester, 21
... Insulating thin film, 22 ... Fuse, 23 ... Metal cap, 30 ... Envelope, 31 ... Holding clip, 32 ... Metal rivet, 33 ... Ground terminal,
34... Electric line terminal, 35... Pressing spring.

Claims (1)

[Claims for Utility Model Registration] A tubular ground electrode with both ends open, a pair of insulating rings coaxially and airtightly attached to both end faces of this ground electrode, and hermetically sealed to the outer end faces of this insulating ring. A discharge part extends coaxially through the central hole of the insulating ring to the cavity of the tubular ground electrode, a circular base part closely contacts the end face of the insulating ring, and an outer part extending from the axis of the ground electrode. A three-electrode type gas in which a gas is filled in an airtight discharge container consisting of a pair of main electrodes each having a rod-shaped projection protruding from the bottom, and a discharge interval is formed between each of the main electrodes and a ground electrode. a discharge tube, and a hole larger than the end face of the rod-shaped protrusion of the main electrode is fitted into the protrusion, and then bent at the outer edge of the base plate of the main electrode to tightly contact at least a part of the surface of the ground electrode. a ring-shaped fuse made of a heat-fusible metal that is fitted into the rod-shaped protrusion of the main electrode so as to overlap the insulating thin film on the substrate of the main electrode; A hole provided at the bottom of the main electrode is fitted into the protrusion of the main electrode, and the main electrode is electrically connected to the ground electrode, and the insulating thin film is partially sandwiched between the main electrode and the ground electrode. A metal cap facing each other with an air gap capable of allowing air discharge limited by the thickness of the insulating thin film, and a lightning arrester comprising: a metal cap that is electrically connected to the earth and connected to the ground electrode of the lightning arrester; A metal holding clip is arranged to conduct electricity and hold the lightning arrester, and the metal cap is connected to the lightning line to be protected and comes into contact with the metal cap of the lightning arrester to press the metal cap in the direction of the holding clip. A lightning arrester device, characterized in that the lightning arrester device is housed in an envelope having a pressing spring arranged so that when the fuse of the lightning arrester melts, the metal cap is brought into contact with the holding clip by the spring pressure.