breaker

By disconnecting the metal plate arm portion of the movable contact point of the circuit breaker into a deformed and fixed arm portion, and setting a contact portion on the fixed arm portion, the problem of large switching error of the circuit breaker temperature recovery is solved, and more accurate temperature control and higher reliability and safety are achieved.

CN118120039BActive Publication Date: 2025-04-04OTSUKA TECH CORP
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Patent Information

Application Number
CN202280063277.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-10-26
Publication Date
2025-04-04
Estimated Expiration
2042-10-26

AI Technical Summary

Technical Problem

When the existing circuit breakers return to the on state, the error in switching temperature is large, which affects the reliability and safety of the circuit breakers.

Method used

By disconnecting the arm portion of the movable contact metal plate into the deformed arm portion and the fixed arm portion, and providing a contact portion on the fixed arm portion, the relative misalignment between the bimetallic member and the contact portion is prevented, thereby reducing the error in the recovery temperature.

Benefits of technology

It effectively reduces the recovery temperature error of the reversed bimetallic parts to return to their original shape and switch the contact state, so that the circuit breaker can return to the on state at the correct temperature, improving the reliability and safety of the circuit breaker.

✦ Generated by Eureka AI based on patent content.

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Abstract

Reduce the error of the recovery temperature from the state of current cut-off to the state of current supply. A circuit breaker, a bimetal that deforms into an inverted shape and a non-inverted shape under ambient temperature causes a movable contact metal plate to deform, thereby switching the contact to on and off, the movable contact metal plate having: an arm portion, which is provided with a movable contact at the end; and a fixed portion, which is fixed to a housing, the arm portion is provided with: a deformable arm portion, which is deformed by being pressed by the bimetal; and a fixed arm portion, which is separated from the deformable arm portion by a slit, and a contact portion that determines the contact position relative to the bimetal portion is provided on the fixed arm portion that is not deformed together with the deformable arm portion.
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Citation Information

Patent Citations

  • USB plug

    WO2017154891A1

  • Protective device

    CN105308709A

  • Thermal protector and protector

    JP2006196443A