Contact spring and electric connection structure

The utility model provides a contact spring. The contact spring comprises a first metal piece; the first metal piece comprises a first fixed part, element contact parts arranged above the first fixed part, and a spring arm part connected between the first fixed part and the element contact parts; the contact spring part further comprises a second metal piece and an insulation connection part; the second metal part comprises a second fixed part, a second switch contact part located above the second fixed part and a connection part connected between the second fixed part and the second switch contact part; the first fixed part and the second fixed part are respectively fixed on the insulation connection part, and a gap is formed between the first fixed part and the second fixed part; and a first switch contact part is arranged at the front end of the element contact part in an extending manner, and is propped against and connected to the lower part of the second switch contact part. The utility model further pr