PTC starter

A positive temperature coefficient (PTC) starter, comprising a housing, a first pin, a second pin, a thermistor, and an elastic element;

• wherein
• the first pin, the second pin, and the thermistor are arranged in the housing;
• the first pin is electrically connected to a first electrode of the thermistor;
• the housing is provided with a thermistor mounting cavity, and the thermistor is arranged in the thermistor mounting cavity;
• the housing is further provided with an elastic element mounting cavity, and the elastic element is arranged in the elastic element mounting cavity;
• a connecting piece is arranged on the elastic element, and two ends of the connecting piece are provided with a first contact part of the elastic element and a second contact part of the elastic element, respectively;
• the second pin is electrically connected to or disconnected from a second electrode of the thermistor through the connecting piece;
• when the thermistor is in a normal state, the elastic element is in an elastic deformation state, the first contact part of the elastic element is in electrical contact with the second electrode of the thermistor, the second contact part of the elastic element is in electrical contact with the second pin, and the second pin is electrically connected to the second electrode of the thermistor;
• after the thermistor ruptures, the elastic element resets, and the connecting piece is moved under a reset effect to push away the ruptured thermistor, so that the second contact part of the elastic element is disengaged from the second pin to cut off an electrical connection between the second pin and the second electrode of the thermistor;
• and
• an isolation structure is provided between the thermistor mounting cavity and the elastic element mounting cavity to prevent fragments of the thermistor in the thermistor mounting cavity from spreading into the elastic element mounting cavity, wherein
• the isolation structure comprises a base isolation wall and a cover isolation wall, wherein the base isolation wall and the cover isolation wall are combined together to isolate the thermistor mounting cavity and the elastic element mounting cavity.