Guide Pin Double Slide Structure for Photo Mask Cleaning

The guide pin applies local quality by creating a localized line contact region instead of surface contact. The inclined sliding portions concentrate the contact area to a thin line along the inclination, reducing the contact area and preventing scratches while maintaining adequate support for cleaning operations.

The inclined sliding portion acts as an intermediary between the photo mask and the guide pin body. This intermediate inclined surface transforms the contact from direct surface-to-surface contact to line contact through the sliding interface, reducing friction and preventing damage during the cleaning process.

The guide pin employs dynamics by incorporating inclined sliding portions that allow controlled movement and self-adjustment during photo mask rotation. The inclined surfaces enable the photo mask to settle into a stable position through gravitational and frictional forces while maintaining rotational stability, preventing eccentricity without requiring complex active control mechanisms.

The asymmetric inclined sliding portions create a preferred positioning orientation for the photo mask. The different inclination angles on different sides of the guide pin generate asymmetric contact forces that guide the photo mask into a stable, centered position during rotation, preventing movement and eccentricity through geometric constraint rather than symmetric support.