Adapter, connector, and opto-electric transmission assembly

An opto-electric transmission assembly comprising:

• an adapter comprising:
• a first housing defining a first accommodating groove and a through hole, the first accommodating groove and the through hole communicating with each other;
• and
• an electrical connector comprising an electrical connecting portion, a supporting portion, and an elastic portion, the supporting portion connecting the electrical connecting portion to the elastic portion;
• the supporting portion accommodated in the through hole, and the electrical connecting portion extending through the first housing;
• the elastic portion extending from the supporting portion toward the first accommodating groove;
• an included angle between the elastic portion and the supporting portion is acute angle;
• and
• a connector comprising:
• a second housing defining a cable slot and a receiving groove, the cable slot and the receiving groove communicating with each other;
• a photoelectric composite cable comprising an electric cable, one end of the electric cable accommodated in the cable slot;
• and
• a terminal accommodated in the receiving groove, the terminal comprising a first contacting portion, a second contacting portion, and a second clamping portion, wherein the first contacting portion is connected to the electric cable, the second contacting portion is exposed from the receiving groove;
• the second contacting portion is configured to cause the elastic portion to move toward a direction where the supporting portion is disposed, and further configured to electrically connect to the elastic portion;
• a second protrusion is disposed on a sidewall of the receiving groove, the second clamping portion and the second protrusion are configured to match with each other to fix the terminal in the receiving groove;
• wherein a surface of the second contacting portion facing away from the first contacting portion comprises a first arc surface, a plane, and a second arc surface, the first arc surface, the plane, and the second arc surface are all exposed from the receiving groove, the plane connects the first arc surface to the second arc surface, the plane is configured to be in contact with the elastic portion.