Connector and pin terminal thereof

The connector comprises an insulation body and a pin terminal fixedly arranged on the insulation body, the pin terminal is formed by forging a drawn cylindrical metal conductor, and the pin terminal comprises a transition part, a contact part and a gradual expansion part, and the contact part and the gradual expansion part are correspondingly connected with the two ends of the transition part respectively. The transition part and the gradually-expanding part are integrally forged and formed, in the first direction, the gradually-expanding part is provided with two first side faces, the transition part is provided with two second side faces, the gradually-expanding part and the transition part are wider than the contact part, in the second direction perpendicular to the first direction, the transition part is wider than the gradually-expanding part, and in the third direction perpendicular to the first direction and the second direction, the transition part is wider than the gradually-expanding part. In the fi