Patent ID: 8910538

Claim:
A robot comprising: a base; a first structure connected to the base to be rotatable about a first axis; a second structure connected to the first structure to be rotatable about a second axis orthogonal to the first axis; and a third structure connected to the second structure to be rotatable about a third axis parallel to the second axis, each of the first structure and the third structure comprising: a one-side wall portion; and an other-side wall portion having a thickness smaller than the one-side wall portion, the first and third structures being hollow structures, the one-side and other-side wall portions of the first structure respectively having identical structures as the one-side and other-side wall portions of the third structure, the second structure comprising: a plate-like main structural part; and a plate-like auxiliary structural part that is located opposite to the main structural part at a predetermined interval and has a smaller plate thickness than the main structural part, and the one-side wall portions of the first and third structures being rotatably connected to the main structural part of the second structure and the other-side wall portions of the first and third structures being rotatably connected to the auxiliary structural part of the second structure.