Small-sized reed type switch tube structure

Abstract

The invention belongs to the technical field of reed switches and vacuum switches, and particularly relates to a reed switch tube structure which comprises a metalized ceramic tube, a moving electrode and a static electrode, wherein the moving electrode and the static electrode are packaged at two ends of the metalized ceramic tube and are made of a soft magnetic metal material; the moving electrode and the static electrode are both in brazed sealing connection with the metallized ceramic tube, and the interior of the ceramic tube is vacuumized or filled with inert gas; a magnetic circuit pole shoe is arranged at the end, which extends into the ceramic tube, of the static electrode, the pole shoe and the static electrode are integrally formed, a static reed is mounted on the pole shoe, one end of the static reed is fixed with the pole shoe in a welding or riveting manner, and a static contact is fixedly mounted at the other end of the static reed; the end, which extends into the ceramic tube,of the moving electrode is provided with a magnetic circuit magnetic pole, the magnetic pole and the moving electrode are integrally formed, the magnetic pole is provided with a moving reed, one end of the moving reed is fixedly welded or riveted with the magnetic pole, the other end of the moving reed is fixedly provided with a moving contact, the middle part of the moving reed is provided with an armature, and the end, which is close to the magnetic pole,of the armature is lapped with the magnetic pole. According to the invention, the switch tube has extremely long mechanical life.

Description

technical field [0001] The invention belongs to the technical field of dry reed switch and vacuum switch (vacuum interrupter), and in particular relates to a dry reed switch tube structure. Background technique [0002] The magnetic reed switch is also called a reed switch. It is an electrical switch operated by an applied magnetic field. The basic type is to seal two magnetic reeds in a glass tube. Although the two pieces overlap, there is a small air gap between them. When an external magnetic field is applied, the two magnetic reeds will be attracted and contacted, so that the current flows through the magnetic reeds to achieve contact connection. Once the magnetic field is away from the switch or disappears, the magnetic reeds will return to their original state under the action of their own elastic reaction force. The overlapped part of the two magnetic reeds re-forms an air gap to realize contact breaking and disconnect the circuit. Therefore, the traditional reed swi...

AI Technical Summary

Problems solved by technology

However, the biggest defect of this structure is that the bellows or the diaphragm are prone to fatigue and cracking, which will cause air leakage in the arc extinguishing chamber and cause the switch to fail.

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