Memory-alloy double insurance type thermal fuse link

Abstract

The invention relates to a memory-alloy double insurance type thermal fuse link. The thermal fuse link is characterized by comprising a metal shell, a memory alloy spring, a copper gasket, temperature-sensing particles, a front gasket, a rear gasket, a drum type spring, a disjunction electrode, a disjunction spring, a porcelain bead, a riveting wire and a contact point wire, wherein the riveting wire is riveted to one end of the metal shell, the memory alloy spring is arranged at one end riveted with the riveting wire in the metal shell, the copper gasket, the temperature-sensing particles, the front gasket, the drum type spring, the rear gasket, the disjunction electrode, the disjunction spring and the porcelain bead are sequentially mounted in the metal shell on the rear side of the memory alloy spring, one end of the contact point wire outside the metal shell stretches into the metal shell from the other end of the metal shell, penetrates through the porcelain bead and the disjunction spring and is connected with the disjunction electrode in a contact manner, and a metal shell port at the joint of the contact point wire and the porcelain bead is sealed by virtue of epoxy resin.The memory-alloy double insurance type thermal fuse link has the advantage that a double insurance fusing effect can be achieved.

Description

technical field [0001] The invention relates to a thermal fuse, in particular to a memory alloy double-safety thermal fuse. Background technique [0002] Thermal fuses are also called thermal fuses, which include metal shells, temperature-sensitive particles, front gaskets, rear gaskets, drum springs, breaking electrodes, breaking springs, ceramic beads, riveting wires and contact wires. The riveting wires are riveted on One end of the metal shell, and then temperature-sensitive particles, gaskets, drum springs, rear gaskets, breaking electrodes, breaking springs and ceramic beads are tightly installed on the metal shell in sequence, and one end of the contact line extends from the outside to the metal shell from the other end of the metal shell. In the shell, the contact wire passes through the ceramic bead and the breaking spring and then contacts and connects with the breaking electrode. The metal shell port at the connection between the contact wire and the ceramic bead ...

AI Technical Summary

Problems solved by technology

[0002] Thermal fuses are also called thermal fuses, which include metal shells, temperature-sensitive particles, front gaskets, rear gaskets, drum springs, breaking electrodes, breaking springs, ceramic beads, riveting wires and contact wires. The riveting wires are riveted on One end of the metal shell, and then temperature-sensitive particles, gaskets, drum springs, rear gaskets, breaking electrodes, breaking springs and ceramic beads are tightly installed on the metal shell in sequence, and one end of the contact line extends from the outside to the metal shell from the other end of the metal shell. In the shell, the contact wire passes through the ceramic bead and the breaking spring and then contacts and connects with the breaking electrode. The metal shell port at the connection between the contact wire and the ceramic bead is sealed with epoxy resin. Because the current fusing temperature is determined by the melting of the temperature-sensitive particles Temperature is determined; in the actual use process, the temperature-sensitive particles are easily affected by the external environment, which makes the temperature-sensitive melting performance of the temperature-sensitive particles invalid. And it will cause electrical appliances to burn out, or even cause fire hazards, so that it cannot meet the actual requirements of electrical appliances for thermal fuses.

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