Painting Tool Hanging Structure with Tool-Free Blade Assembly
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Solution Overview
Problem
Conventional paint squeegees require additional tools for blade replacement and assembly, and the connection between the body and side covers is weak, leading to inconvenience and storage issues.
Innovation Solution
A hanging structure for a painting tool with a concave-convex engagement design between the body and side covers, allowing for stable connection and easy blade replacement without tools, featuring a clamping slot, buckling recesses, and hanging parts for improved strength and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the blade is screwed onto the handle, then the connection is secure, but additional tools are required for blade replacement and assembly
Solution Approach 1:
The painting tool is divided into modular components (handle, blade, side covers) that can be independently assembled and disassembled. The handle includes a receiving cavity that accepts the blade connecting end, allowing tool-free assembly through simple insertion rather than requiring screw fastening.
Solution Approach 2:
The screw fastening mechanism is extracted and replaced with a direct insertion system. The blade connecting end is directly inserted into the receiving cavity of the handle, eliminating the need for screws and additional tools for assembly and disassembly.
2Reliability
If the screw is tightened repeatedly, then the connection is secure, but the screw is prone to loosening
Solution Approach 1:
The connection system is segmented into distinct components with dedicated engagement features. The limiting grooves and limiting protrusions create a mechanical interlock that maintains connection reliability without requiring repeated tightening, eliminating the loosening issue inherent in screw-fastened designs.
3Ease of operation
If multiple positioning bodies are attached to the inner circumferential surface of fastening holes, then the side covers can be easily engaged, but the combined strength is inadequate
Solution Approach 1:
The positioning bodies and limiting features are merged into an integrated engagement system. The side cover engaging surfaces work together with the limiting grooves and protrusions to provide both easy engagement and strong combined strength, rather than relying solely on multiple positioning bodies in fastening holes.
Solution Approach 2:
The engaging surfaces incorporate curved and contoured features that enhance the mechanical interlock between side covers and the handle. The limiting grooves and protrusions create a more robust connection geometry that increases combined strength while maintaining ease of assembly.
4Device complexity
If no hanging design is provided, then the structure is simpler, but storage is inconvenient and takes up space
Solution Approach 1:
The side covers serve multiple functions: they protect the handle ends, provide structural engagement through engaging surfaces, and incorporate hanging holes for storage. This multi-functionality adds minimal complexity while significantly improving storage convenience.
Solution Approach 2:
The hanging function is segmented as a separate feature (hanging holes) integrated into the side covers, allowing the primary structural functions to remain simple while adding the storage benefit independently through the engaging surfaces and limiting features.
Data Source
AI summary
A hanging structure for a painting tool includes a body, a knife board, and two side covers. The body comprises an abutting part on a bottom surface, a protruding board, and two buckling recesses. A clamping slot is formed between the abutting part and the protruding board, whereas the two buckling recesses are in both ends of the body, respectively, and each buckling recess has a first engaging part. The knife board is assembled into the clamping slot, so it can abut the abutting part. The two side covers are assembled into the two buckling recesses, respectively. Each side cover has a second engaging part that engages with the first engaging part, and at least one side cover has a hanging part that protrudes from the outer surface of the side cover. The second engaging part is engaged with the first engaging part, whereas the hanging part protrudes from the outer surface of the side cover.