Heating Roller Support Using Small Diameter Rollers

The patent extracts the heat insulating bush from the traditional bearing structure and places it directly on the core. This eliminates the need for a large-diameter bearing while maintaining thermal insulation. The support roller directly contacts the core without requiring a large bearing housing, thus reducing the overall device size while preserving heat resistance functionality.

The patent segments the support function into two separate components: the support roller for mechanical support and the heat insulating bush for thermal insulation. This segmentation allows each component to be optimized independently - the support roller can be smaller since it doesn't need to provide both mechanical and thermal functions, reducing the overall device volume.

The patent removes the expensive large-diameter bearing component and replaces it with a simpler support roller structure. By extracting the bearing from the design and using direct contact support with heat insulating bushes, the manufacturing cost is significantly reduced while maintaining the necessary heat resistance functionality.

The patent uses simpler, less expensive support rollers instead of costly high-temperature bearings. The support rollers can be made from standard materials rather than specialized heat-resistant materials, reducing the overall cost of the fixing device while still providing adequate support functionality.