Patent ID: 8246254

Claim:
A bearing structure including a radial bearing and a rotary shaft, and wherein the radial bearing rotatably supports an end of the rotary shaft while the radial bearing receives a thrust load, rotary shaft having an outer periphery, the bearing structure comprising: a rolling body supported in the radial direction of the rotary shaft within the bearing; a support portion for rotatably supporting the rolling body, wherein the support portion is fit over an outer periphery of the rotary shaft; and an extended portion extending integrally from the support portion toward the axial direction of the rotary shaft, wherein the extended portion is press-fitted over the outer periphery of the rotary shaft, wherein the extended portion extends integrally from the support portion toward the end of the rotary shaft, wherein the inside diameter of the extended portion is smaller than the inside diameter of the support portion, and the outside diameter of the portion of the rotary shaft at which the extended portion is press-fitted over is smaller than the outside diameter of the portion of the rotary shaft at which the support portion is fitted.