Patent ID: 8651830

Claim:
A central tubular structure of a shaft seat, which is applied to a fan device, the central tubular structure of the shaft seat comprising: a base; a bushing connected with the base, having an outer tubular wall, an inner tubular wall and a top section, the top section being a continuous flat plate member interconnected between the outer and inner tubular walls to together define an annular receiving space, the inner tubular wall defining therein a bearing hole having an open end in adjacency to the top section, the bushing further having a reception space in adjacency to the base, the reception space having a first end opposite to the top section in communication with the annular receiving space and the bearing hole, the reception space further having a second end in adjacency to the base; a sealing member fitted in the reception space to seal the second end thereof; and wherein an integral annular raised section is formed on an inner circumference of the inner tubular wall of the bushing; a pair of spaced bearings one bearing being rested on each side of the annular raised section.