Relay with main contact working state detection function

Abstract

The invention relates to a relay, in particular to a relay with a main contact working state detection function. A relay with a main contact working state detection function is characterized in that the relay comprises a shell, a main contact and a main contact working state detection assembly are arranged in the shell, the main contact is arranged on a movable contact spring and located between two oppositely-arranged main magnets, the main contact working state detection assembly is located on the lower side of the movable contact spring, and the main contact working state detection assembly is located on the lower side of the movable contact spring. The main contact working state detection assembly comprises a magnet for detection and a reed pipe, a magnetic isolation structure is arranged between the reed pipe and the main magnet, the movable contact spring is linked with the reed pipe or the magnet for detection, and when the movable contact spring ascends and descends, the reed pipe is connected or disconnected under the action of the magnet for detection. The relay has the advantages that the working state of the main contact is detected more accurately, and miniaturization of the relay is facilitated.

Description

technical field [0001] The invention relates to a high-voltage direct current relay, in particular to a relay with the function of detecting the working state of a main contact. Background technique [0002] In order to detect the working state of the main contact, the Chinese patent with the application number of 201821786954.X discloses a relay, which includes a housing, a moving contact plate is arranged in the housing, a main contact is arranged on the moving contact plate, and the lower side of the moving contact plate is provided. A first permanent magnet corresponding to the first reed switch and a second permanent magnet corresponding to the second reed switch are provided, and the first reed switch and the second reed switch are fixed on the outer wall of the housing through a mounting bracket. [0003] The above scheme has the following defects: the reed switch used for inducing the magnetic field generated by the permanent magnet is placed outside the casing, the ...

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Problems solved by technology

[0003] The above scheme has the following defects: the reed switch used to induce the magnetic field generated by the permanent magnet is placed outside the casing, the casing plays a certain role in shielding the magnetic field of the permanent magnet, and the outside of the casing does not shield the magnetic field on the outer wall of the relay. It is easy to be misjudged by the external magnetic field of the relay; in order to facilitate arc extinguishing, a magnet for arc extinguishing is often installed in a conventional relay, and the magnet for arc extinguishing is closer to the reed switch than the first permanent magnet and the second permanent magnet. The reed switch is very easy to misjudge; the reed switch is located outside the housing through the mounting bracket, which will increase the width of the relay and affect the miniaturization of the relay;

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