Telescopic Vacuum Cleaner Tube Locking Structure Against Tilt
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Solution Overview
Problem
Existing vacuum cleaner suction tubes face issues with length adjustment due to actuating mechanisms tilting during telescoping, preventing trouble-free length adjustment.
Innovation Solution
The design incorporates locking teeth with tips below the surface of the inner tube, preventing tilting of the actuating mechanism by deforming the material to create latching recesses and using multiple latching areas with specific spacing and support flanks for secure engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the actuating mechanism is designed to engage with latching depressions formed by recesses in the inner tube surface, then the length adjustment function is enabled, but the actuating mechanism tilts during telescoping, preventing trouble-free adjustment
Solution Approach 1:
The patent applies local quality by creating locking teeth with tips that are positioned at a different level (below the surface) compared to the surrounding latching area. This local differentiation in the geometry of the latching area allows the locking tooth tips to engage the actuating mechanism without causing tilting, while maintaining the overall telescoping function. The selective positioning of tooth tips below the surface creates a localized solution that resolves the tilting problem without affecting the overall adjustment mechanism.
2Adaptability or versatility
If multiple latching areas are provided for variable length adjustment, then the adaptability of the suction tube is improved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the latching area into multiple discrete locking areas along the inner tube. Each locking area contains latching depressions and locking teeth that can independently engage with the actuating mechanism. This segmentation allows the suction tube to achieve variable length adjustment at multiple discrete positions, providing adaptability while keeping each individual locking area relatively simple in structure.
Solution Approach 2:
The patent merges multiple functional elements into a unified latching area structure. The latching depressions, locking teeth, and support flanks are integrated into a single continuous structure on the inner tube surface. This merging reduces the number of separate components needed, simplifying manufacturing and assembly while still providing multiple locking positions for variable length adjustment.
Data Source
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AI summary
The vacuum cleaner-suction tube (1) has an inner tube (2) and an outer tube (3), where the vacuum cleaner-suction tube is adjustable with respect to its length by sliding the outer tube relative to the inner tube. A locking portion has first and second locking recesses. A locking tooth is formed between the first and second locking recesses, where a tooth tip of the locking tooth is arranged under an upper surface of the inner tube.