Protective element

A protective element comprising:

• a case having a first opening and a second opening at opposite ends of the case;
• a first electrode portion;
• a second electrode portion disposed distant from the first electrode portion;
• a fuse element portion having spring characteristics and comprising:
• a first end section that is connected to the first electrode portion which passes through the first opening;
• a second end section that is connected to the second electrode portion which passes through the second opening;
• and a cutoff section that is positioned between the first end section and the second end section;
• and
• a first securing portion disposed in an internal chamber of the case, wherein the first end section, the second end section, and the cutoff section of the fuse element portion are disposed in the internal chamber of the case, wherein the first securing portion has insulating properties, wherein the first securing portion contacts and presses against one surface of the fuse element portion, in order to bend the fuse element portion so that two cut ends of the cutoff section are pulled apart from each other, wherein the first end section is sandwiched between a ceiling surface of the internal chamber of the case and the first securing portion, and wherein the fuse element portion is held in the internal chamber of the case in a bent state such that, when the fuse element portion is cut, both cut ends of the cutoff section are pulled apart from each other.