Adjustable Ice Scraper Shaft With Rib-Locked Telescoping Strength
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Solution Overview
Problem
Conventional snow and ice removal tools with adjustable handles face issues such as inability to fine-tune length, structural weakness, and difficulty in cleaning due to locking mechanisms that compromise strength and allow dirt entry.
Innovation Solution
An adjustable shaft with non-through reinforcing ribs on the inner handle frame for structural reinforcement, a non-circular cross-section for enhanced strength, and a push-button locking mechanism that prevents dirt entry and allows easy length adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If locking through holes are formed along the inner tube to enable length adjustment, then the handle length can be fine-adjusted, but the structural strength of the inner tube is weakened
Solution Approach 1:
The locking mechanism is segmented into multiple discrete locking positions (locking through holes) along the inner tube, allowing the user to select different lengths by engaging the locking head at different positions. This segmentation enables fine-adjustment of handle length while maintaining structural integrity at each locked position.
Solution Approach 2:
The locking through holes are arranged in multiple rows (not just a single row) on the inner tube, adding a dimensional aspect to the locking mechanism. This multi-row configuration provides additional locking positions and redundancy, enhancing both the adjustment capability and the overall structural strength by distributing stress across multiple locations.
2Manufacturing precision
If multiple rows of locking through holes are added to increase adjustment options, then the length adjustment precision is improved, but the structural strength of the inner tube is further weakened
Solution Approach 1:
Multiple rows of locking through holes are formed on the inner tube, creating a two-dimensional array of locking positions rather than a single row. This multi-row configuration increases the number of available locking positions and adjustment options, thereby improving length adjustment precision while distributing mechanical stress across multiple rows, which helps maintain structural strength.
3Adaptability or versatility
If locking through holes are used for length adjustment, then the handle length can be adjusted, but ice, snow, and dirt can enter the interior of the inner tube making it difficult to clean
Solution Approach 1:
The locking head is designed to engage with the locking through holes from the exterior of the inner tube, extracting the locking function to an external component rather than requiring internal mechanisms. This design allows the inner tube interior to remain sealed and free from dirt accumulation, while still providing adjustable length functionality through the external locking mechanism.
4Adaptability or versatility
If a detachable attaching mechanism with multiple handle posts is used, then the handle length can be adjusted, but the tool size is difficult to store and carry when disassembled
Solution Approach 1:
The inner tube is slidably received within the outer tube, creating a nested configuration when the handle is in its retracted or minimized state. This nesting arrangement allows the adjustable shaft to be compacted to a smaller size for storage and portability, while still providing the capability for length adjustment when needed. The locking mechanism secures the nested tubes at various extended positions.
Data Source
AI summary
An adjustable shaft for an ice scraper and a snow brush includes a shaft member and an adjustable positioning arrangement. The shaft member includes an inner handle frame and an outer handle frame slidably receiving the inner handle frame for coupling the ice scraper and the snow scraper at two ends of the shaft member, wherein the inner and outer handle frames are slid with each other to selectively adjust a length of the shaft member. The adjustable positioning arrangement includes a plurality of non-through reinforcing ribs spacedly indented on the inner handle frame to reinforce a structure of the inner handle frame, and a positioning member movably coupled at the outer handle frame to selectively engage with one of the reinforcing ribs so as to lock up a relative sliding movement between the inner and outer handle frames.