Electrical connector, board-to-board connector, and electronic device

An electrical connector, comprising:

• a first insulating shell;
• and
• electrical connecting components;
• wherein the electrical connecting components are disposed on the first insulating shell;
• each of the electrical connecting components comprises a fixing portion, a connecting portion, and a contact portion;
• an upper end of the connecting portion is bent to form the fixing portion, the connecting portion extends into the first insulating shell and is embedded in the first insulating shell, a lower end of the connecting portion is bent to form the contact portion, the contact portion faces outward and is bent upward and downward to protrude a free end, and the free end is electrically connected to an external electrical contact sheet;
• and
• the contact portion comprises an upper contact and a lower contact, the upper contact and the lower contact are capable of being matched with the external electrical contact sheet, a distance between the upper contact and the connecting portion is greater than a distance between the lower contact and the connecting portion, so that both the upper contact and the lower contact are capable of being stably in electrical contact with the external electrical contact sheet.