Cage-type hyperbolic spring structure and socket

A cage-type hyperbolic spring structure for being applied in a jack terminal, comprising:

• a plurality of elongated annular springs;
• and
• a machined body,
• wherein each one of the plurality of elongated annular springs comprises an inner ring spring and an outer ring spring, both the inner ring spring and the outer ring spring are in a shape of straight line, the plurality of elongated annular springs are annularly wound into a closed cylindrical annular structure by laser spot welding, and the inner ring spring is closer to an axial line of the cylindrical annular structure than the outer ring spring;
• the machined body is in a circular tubular shape, and the cylindrical annular structure is inserted into the machined body and closely fits the machined body;
• and
• a pressing structure configured to press the cylindrical annular structure and the machined body tightly is provided at an end of the machined body;
• wherein each end of elongated annular spring forms an included angle being larger than 0 degree and not larger than 90 degrees with respect to a radial direction;
• and
• wherein the outer ring spring is in parallel with an axial direction, and the inner ring spring forms an included angle being larger than 0 degree and not larger than 20 degrees with respect to an axial direction.