Angle-adjuster for a headrest

The patent removes the gear mechanism entirely from the headrest adjustment system. Instead of using a complex gear and snap-locking system, the invention employs a simple pin-and-hole positioning mechanism where pins on the adjustment arm engage with holes in the headrest support, eliminating unnecessary components while maintaining positioning functionality.

Rather than using a locking mechanism that snaps into place (active locking), the patent uses a passive positioning approach where the pin naturally settles into the nearest available hole position. The system inverts the traditional approach by allowing free movement within limits and providing positioning only when needed, rather than requiring continuous locking and unlocking actions.

The patent extracts the snap-locking mechanism from the system and replaces it with a smooth pin-through-hole engagement. The pin simply passes through aligned holes in the adjustment arm and headrest support, creating position fixation without any snapping or clicking sounds during the adjustment process.

The patent converts the potential harm of noise into a benefit by using a friction-based positioning system. The slight friction between the pin and hole provides stable positioning while the smooth engagement eliminates noise. The system transforms what could be a noisy mechanical engagement into a quiet, friction-based position hold.

The patent segments the adjustment range into multiple discrete hole positions distributed along the adjustment arm's path. Instead of continuous gear-based adjustment with limited range, the system provides multiple discrete positioning points (at least 3 holes) that offer both precision and extended range. Each hole represents a precise stop position, while the overall distribution of holes provides versatile adjustment coverage.

The patent extends the adjustment from a single-degree-of-freedom gear rotation to a multi-position system using the spatial arrangement of holes along the adjustment arm. By distributing holes in different positions and orientations, the system adds dimensional versatility to the adjustment mechanism, allowing broader angular coverage while maintaining precision at each position.

The patent extracts and eliminates the gear mechanism, locking system, springs, and associated components. The positioning function is achieved with minimal components: an adjustment arm with pins, a headrest support with holes, and basic connection elements. This drastic reduction in component count simplifies the system while maintaining reliable angle positioning capability.

The patent makes the adjustment arm serve multiple functions simultaneously: it provides structural support for the headrest, enables angular adjustment through pin-hole engagement, and provides positioning precision through the distributed hole pattern. This multi-functionality eliminates the need for separate gears, locks, and positioning mechanisms, reducing overall component quantity while maintaining reliability.