Vehicle Ventilation Air Filter Guide Slot for Low-Force Installation

The patent applies asymmetry by using obliquely converging sliding guides instead of parallel ones. The guides are angled relative to each other, creating a tapered configuration that reduces contact surface area during insertion. This asymmetric arrangement allows the filter to be guided into position with minimal force while still achieving secure positioning once installed.

The patent introduces a guide slot oriented in the insertion direction, adding a new dimensional element to the guidance system. This guide slot works in conjunction with the obliquely converging sliding guides, providing guidance along the insertion path while the converging guides provide lateral positioning. This multi-dimensional approach maintains effective guidance with reduced installation force.

The patent merges the guidance function into the filter frame itself through the guide slot, rather than requiring separate guide depressions in the housing. The guide slot is integrated directly into the filter structure, eliminating the need for additional housing features. This consolidation reduces housing complexity and construction space while maintaining effective guidance when combined with guide pins.

The patent employs a pleated filter medium that creates a porous, multi-layered structure. This pleated configuration increases the effective sealing surface area through the folded layers while maintaining overall compactness. The pleats allow the filter to seal effectively against the housing without requiring a large flat covering surface, thereby reducing air resistance and noise generation while preserving sealing reliability.