Heavy-load reed switch structure

Abstract

The invention belongs to the technical field of reed switches, and particularly relates to a large-load reed switch structure which comprises a glass tube, a short pin and a long pin, the short pin and the long pin are packaged at two ends of the glass tube and hermetically connected with the glass tube, and a pole shoe is arranged at one end, extending into the glass tube, of the short pin. The pole shoes and the short pins are integrally formed; according to the design, a design structure of magnetic circuit and circuit separation is adopted, the high-conductivity reed is adopted to reduce the on resistance of the circuit, and unreliable switching action caused by demagnetization of a magnetic circuit due to resistance heating of large-load current is reduced; a clapper-type armature magnetic circuit structure is adopted, the inherent elastic recovery counterforce of a traditional reed switch magnetic reed is eliminated while the armature can generate attraction action under the action of a magnetic field, and the recovery counterforce required for breaking a contact is independently provided by a copper alloy elastic conductive reed, so that the contact area of the contact is increased for increasing the sectional area of the copper alloy elastic reed of the circuit. And conditions are created for reducing the circuit resistance.

Description

technical field [0001] The invention belongs to the technical field of reed switches, and in particular relates to a large-load reed switch 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 switch belongs to a structure in which the...

AI Technical Summary

Problems solved by technology

The large-load reed switch and reed relay are ideal switching elements for short-wave communication, electric trains and explosion-proof electrical equipment electrical control systems. When the traditional reed switch is connected to a large load current, due to the soft magnetic reed resistivity Higher, the current will make the reed more likely to heat up, resulting in high-temperature demagnetization of the magnetic circuit, resulting in unreliable pull-in contact

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