Vacuum cleaner suction hose

The patent removes the spring element from the locking mechanism. Instead of using spring force to maintain the locked position, the design relies on the geometric interlocking of the toothed rack and toothed strip, where the teeth engage directly without requiring elastic stabilization. This extraction of the spring component eliminates the need for users to overcome spring force during adjustment while maintaining reliable locking through precise tooth engagement.

The locking mechanism is designed to be self-locking through the engagement of teeth on the rack and strip. The geometric configuration of the teeth creates a self-sustaining locked position that does not require additional spring force to maintain. The structure itself provides the stabilization function that previously required a spring element.

The patent divides the continuous adjustment range into discrete locking positions using multiple teeth on the rack and strip. Each tooth engagement creates a distinct, stable locking position. By increasing the number of teeth, the system provides multiple discrete positions that offer stable locking while maintaining fine adjustment precision, as each tooth represents a small incremental step in the telescoping range.

The design changes the parameter of tooth spacing and number to optimize both stabilization and precision. By carefully designing the tooth dimensions and spacing, the mechanism achieves stable engagement at each position while providing frequent enough positions to allow precise adjustment. The tooth geometry is optimized to provide sufficient engagement depth for stability while maintaining small enough increments for precision.