circuit breaker

JP7797082B2Active Publication Date: 2026-01-13NITTO KOGYO KK
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Patent Information

Application Number
JP2022055092
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-03-30
Publication Date
2026-01-13
Estimated Expiration
2042-03-30

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Abstract

To prevent a risk where a terminal screw cannot be removed by a scattering substance, contained in arc gas, adhered to the terminal screw.SOLUTION: A circuit breaker comprises: a movable contactor 50 having a movable contact 51; a fixed contactor 60 having a fixed contact 61 and a terminal screw hole; a terminal screw 70 to be inserted into the terminal screw hole; and an exhaust space Ea for discharging arc gas generated when the movable contact moves away from the fixed contact. In the exhaust space provided below the terminal screw hole, a screw protection part is provided to protect a lower end side of the terminal screw from the arc gas.SELECTED DRAWING: Figure 4
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Citation Information

Patent Citations

  • Circuit breaker

    JP2003346635A

  • Circuit breaker

    JP2018032542A

  • Distribution board

    JP2019017247A

  • Switchgear arc extinguishing chamber

    JP3035548U