Combined structure of wearable apparatus

A combined structure of a wearable apparatus, the combined structure comprising:

• a torso fastening part configured to be fixedly fastened to a wearer's torso;
• a fixed link extending from the torso fastening part to a position above a wearer's shoulder;
• a first link and a second link being respectively coupled to the fixed link to be laterally rotatable, and crossing each other while being vertically spaced apart from each other;
• a rotatable part disposed at a position above the wearer's shoulder, and coupled to the first link and the second link to be laterally rotatable;
• a connecting part coupled to the rotatable part to extend downward from the rotatable part;
• and
• an upper arm module coupled to be rotatable upward or downward about the connecting part while an end thereof is coupled to the connecting part at a position corresponding to an upper end portion of a wearer's upper arm, and configured to be fastened to the wearer's upper arm and extended in a longitudinal direction of the wearer's upper arm,
• wherein the first link and the second link are respectively coupled to the rotatable part and the fixed link to form a four-bar linkage structure, and
• wherein the rotatable part coupled to the first link and the second link to be laterally rotatable is configured to rotate about an instantaneous center of rotation (ICR) formed at an intersection of the first link and the second link, the ICR configured to move along a semicircular path with only a single degree of freedom.