Dual springs in a rod cosmetic container absorb forward and rearward impacts while preventing restoring force damage to the internal material.
A pen shaft uses a perpendicular actuator and rotating connector to adjust the lead position.
A stick cosmetic cartridge uses a compression spring to absorb impact and vibration forces, preventing material loosening and breakage.
A rotating pin with a cylindrical freewheel section constrains radial movement of threaded elements to maintain consistent thread engagement.