Circuit breaker

A circuit breaker comprising:

• a fixed electrode;
• a movable electrode movable between a first position in contact with the fixed electrode and a second position away from the fixed electrode;
• a container to hold the fixed electrode and the movable electrode inside;
• and
• a movable shaft extending from an outside to an inside of the container and connected to the movable electrode,
• wherein the movable shaft moves the movable electrode between the first position and the second position by moving along an extending direction of the movable shaft;
• a bellows member that is disposed so as to surround a periphery of the movable shaft, includes a plurality of uneven portions, and connects the movable shaft and the container;
• and
• a resin layer connected to the plurality of uneven portions of the bellows member, wherein
• the container includes a first connection portion to which a first end of the bellows member is connected,
• the movable shaft includes a second connection portion to which a second end located on a side opposite to the first end of the bellows member is connected,
• the plurality of uneven portions include:
• a first recess closest to the first connection portion;
• a second recess closest to the second connection portion;
• and
• a plurality of intermediate recesses disposed between the first recess and the second recess,
• the resin layer includes:
• a first part that is connected to the first recess and has a first thickness;
• a second part that is connected to the second recess and has a second thickness;
• and
• a third part that is connected to at least one of the plurality of intermediate recesses and has a third thickness, and
• the third thickness is thinner than the first thickness and the second thickness,
• the plurality of intermediate recesses include:
• a first intermediate recess closest to the first recess;
• a second intermediate recess closest to the second recess;
• and
• a plurality of third intermediate recesses disposed between the first intermediate recess and the second intermediate recess,
• the third part of the resin layer includes:
• a first intermediate part that is connected to the first intermediate recess and has a fourth thickness;
• a second intermediate part that is connected to the second intermediate recess and has a fifth thickness;
• and
• a third intermediate part that is connected to at least one of the plurality of third intermediate recesses and has a sixth thickness, and
• the fourth thickness and the fifth thickness are thicker than the sixth thickness.