Foldable Sander Head Pivot Joint for Corner Access
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Solution Overview
Problem
Conventional sanders, such as pole sanders, face difficulties in efficiently sanding corners of walls and ceilings due to their fixed planar configuration, which restricts access and sanding efficiency at intersections of surfaces lying in different planes.
Innovation Solution
A foldable sander head with first and second pivotable head portions connected by a pivot joint, allowing configuration between a planar and a folded state, enabling the sander to access corners by forming an included angle less than 180 degrees, and featuring a latch system for secure locking and easy pivoting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the sander head is designed with a fixed planar configuration, then the structure is simple and stable, but it cannot access corners and intersections of surfaces effectively
Solution Approach 1:
The sander head is divided into multiple head portions (first head portion and second head portion) that can be independently positioned. This segmentation allows each portion to be oriented at different angles, enabling access to corners and intersections while maintaining a relatively simple overall structure when not in use.
Solution Approach 2:
The sander head incorporates a pivot joint connector that allows the head portions to rotate and adjust their positions dynamically. This dynamic capability enables the sander to adapt to various corner angles and surface intersections, transforming from a static fixed structure to a flexible adjustable one.
2Adaptability or versatility
If the sander head is made foldable with pivotable portions, then accessibility to corners is improved, but the risk of accidental pivoting and structural instability increases
Solution Approach 1:
The latch mechanism is designed to automatically engage with the catch when the head portions are in the desired position, providing self-locking functionality. This self-service feature ensures structural stability during sanding operations without requiring continuous manual intervention to maintain the folded configuration.
Solution Approach 2:
The pivot joint connector provides controlled movement capability, allowing the head portions to pivot smoothly when needed while maintaining stability when locked. The dynamic design includes both movement freedom and stabilization mechanisms to balance adaptability with reliability.
3Reliability
If a latch mechanism is added to lock the head body, then structural stability is improved, but the device complexity and number of components increases
Solution Approach 1:
The latch mechanism is integrated with the pivot joint connector, combining the locking function with the existing structural component. This merging approach provides the necessary locking stability without adding significant complexity, as the latch and catch are incorporated into the already-present pivot joint structure.
4Manufacturing precision
If multiple separate fasteners are used to assemble the sander head, then assembly precision is improved, but the assembly time and complexity increases
Solution Approach 1:
Multiple fastening functions are merged into the single pivot joint connector structure, which inherently provides precise alignment and secure connection. This consolidation maintains assembly precision while significantly reducing the number of separate fasteners needed, thereby decreasing assembly time and complexity.
Data Source
AI summary
A foldable sander head includes a head body with first and second head portions. The first and second head portion are pivotable relative to one another about a pivot joint between a planar configuration and a non-planar configuration. A pivot joint connector couples the first and second head portions to one another. The pivot joint connector includes a slide coupler that is slidably coupled to the first and second head portions, such as by tracks on the first and second head portions. The first and second head portions are selectively lockable relative to one another in the planar configuration and are free to pivot in the non-planar configuration. The pivot joint passes through and orthogonal to a central axis of the head body.