Linkage mechanism, base, and surge protection device

A linkage mechanism, comprising a linkage swing rod and transmission components, wherein

• the linkage swing rod is arranged to be rotatably connected, and is provided with a trigger portion capable of triggering a switch when rotating and at least two stress portions arranged spaced apart from each other on one side of an axis of rotation of the linkage swing rod;
• and
• one transmission component is arranged corresponding to each of the stress portions, and the transmission components are arranged in such a way that any of the transmission components applies a pushing force to the stress portion to rotate the linkage swing rod, and thus the trigger portion triggers the switch,
• wherein each transmission component comprises a transmission body member and a spring connected to the transmission body member, and
• the transmission body member comprises:
• an intermediate portion, arranged for pushing the stress portion of the linkage swing rod;
• a first post, located on one side of the intermediate portion facing the stress portion, and arranged for bearing pressure in a direction facing away from the stress portion;
• and a second post, arranged on one side of the intermediate portion facing away from the stress portion, and sleeved with the spring.