a circuit breaker

Abstract

The invention discloses a circuit breaker which comprises a shell. An arc extinguishing chamber, an operation mechanism, a tripping mechanism, a first binding post and a second binding post are arranged on the shell. The tripping mechanism is located between the first binding post and the arc extinguishing chamber and comprises a magnet yoke, an armature and a bimetallic strip. The armature is hinged and fixed to the shell through a hinge column. A partition plate for separating the arc extinguishing chamber and the operation mechanism and separating the arc extinguishing chamber and the tripping mechanism is integrally formed on the shell. A torsional spring for enabling the armature to move away from the magnet yoke is further arranged on the hinge column. An included angle is formed at the portion, at the lower end of the bimetallic strip, of the partition plate. The magnet yoke is fixedly arranged inside the shell and provided with a downward-extending elastic presser foot. The lower end of the bimetallic strip is compressed and fixed into the included angle of the partition plate through the elastic pressure foot. By adopting the structure, the circuit breaker is simpler in structure, more convenient to install and better in performance.

Description

technical field [0001] The invention relates to a circuit breaker. Background technique [0002] In order to improve the breaking capacity of the circuit breaker and arrange the positions of the components in the circuit breaker more reasonably, the applicant has previously applied for an invention patent with the publication number CN103560058 A, but in the above patent, the bimetal is It is connected to the first terminal through a splitter plate, and a metal frame needs to be set up to install and fix the splitter plate and the bimetal, which not only leads to complicated product structure and troublesome installation, but also causes the bimetal to be damaged during tripping. Deformation and swing occur, so the indirect connection method of connecting the splitter plate to the first terminal is not stable enough. In addition, in the above patent, in order to keep the armature moving in the direction of separation from the yoke, a tension spring is provided, and at the s...

AI Technical Summary

Problems solved by technology

[0002] In order to improve the breaking capacity of the circuit breaker and arrange the positions of the components in the circuit breaker more reasonably, the applicant has previously applied for an invention patent with the publication number CN103560058 A, but in the above patent, the bimetal is It is connected to the first terminal through a splitter plate, and a metal frame is required to install and fix the splitter plate and the bimetal, which not only leads to complicated product structure and troublesome installation, but also causes the bimetal to be damaged during the tripping process. Deformation and swing occur, so the indirect connection through the splitter plate and the first terminal, the stability is not good enough

In addition, in the above patent, in order to keep the armature moving in the direction of separation from the yoke, a tension spring is provided, and at the same time, an arc guide plate is introduced to ensure that the two ends of the tension spring are hooked and fixed, which also makes the structure of the product complicated. troublesome installation

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