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cohn springs consist of tension springs and connecting springs. The pitch and helix direction of the tension spring and the connecting spring are identical. A special fixture is used to clamp one end of the tension spring and screw it into the connecting spring. The other end of the tension spring is then rotated and fitted onto the other end of the connecting spring. Rotational force is used to screw the connecting spring into the interior of the tension spring, forming a ring spring. This utility model ring spring does not affect the shape and elasticity of the connection point and provides a secure connection for various applications requiring ring springs. The ring spring consists of multiple washers with inner conical surfaces and outer cylindrical surfaces.