Adjustable Armrest Locking Assembly for Simple Height Positioning

The adjustment assembly is divided into distinct functional segments: the adjustment slot provides the movement path, the clip stopper with teeth provides the locking mechanism, and the grooves provide the engagement points. This segmentation allows each component to be simple in itself while collectively providing complex adjustability functionality.

The patent extracts the essential adjustment functionality from complex conventional mechanisms and implements it using only the necessary components: an adjustment slot, a clip stopper with teeth, and grooves. By taking out only the essential elements needed for height adjustment and locking, the design achieves adaptability without unnecessary complexity.

The adjustment assembly uses simple, inexpensive components that can be easily manufactured: a slot cut in the base, a clip stopper with molded or machined teeth, and grooves in the armrest. These components are designed to be simple and cost-effective rather than using expensive precision mechanisms.

The repeating pattern of grooves and teeth creates a standardized, modular system that can be manufactured using repetitive processes. The same basic tooth-groove engagement mechanism is used at multiple height positions, allowing for efficient manufacturing through copying the same simple geometry multiple times.

The clip stopper with its teeth is designed to preemptively engage with the grooves to prevent unwanted movement. The mechanical interlocking provides built-in protection against the armrest slipping or detaching during use, addressing potential failure modes before they occur.

Instead of using a complex mechanism to prevent failure, the patent uses a simple positive mechanical interlock where the teeth physically block movement except at designated groove positions. This inverted approach—using simple geometric constraints rather than complex control mechanisms—provides high reliability with minimal components.