Non-Parallel Drum Support Geometry for Force Distribution

The patent applies asymmetry by configuring the supporting members with non-parallel lines connecting the supporting portions to the rotational center of the photosensitive drum. Specifically, the first and second supporting lines are configured to be non-parallel to each other, creating an asymmetric support structure that balances the resultant forces acting on the drum. This asymmetric arrangement ensures stable support while distributing forces evenly, preventing drum displacement and maintaining operational reliability.

The patent applies parameter changes by optimizing the geometric parameters of the supporting members, specifically the angles and positions of the non-parallel lines. By carefully selecting the parameters of the first and second supporting lines, the design achieves balanced force distribution without requiring excessively high manufacturing precision. The parameter optimization allows for standard manufacturing tolerances while still achieving the desired stability and durability.

The patent applies the extraction principle by isolating the force distribution function into the supporting member geometry itself, rather than requiring complex external mechanisms. The non-parallel configuration of the supporting lines inherently provides force balancing, extracting the complexity from the overall device and concentrating it only in the simple geometric arrangement of the supporting members. This allows for elegant force distribution without adding significant device complexity.