Self-Stabilizing Jigsaw Puzzle Undercut Design
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Solution Overview
Problem
Conventional jigsaw puzzles, both two-dimensional and three-dimensional, face issues with instability and difficulty in assembly due to play at connecting edges, leading to pieces detaching during lifting or requiring excessive force to complete, especially towards the end of assembly.
Innovation Solution
The puzzle pieces are designed with precisely defined undercut regions and corresponding extensions, ensuring stable support by creating a triangle of forces through distant contact points on their circumferential edges, allowing for self-stabilization and easy separation, applicable to both two-dimensional and three-dimensional puzzles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If puzzle pieces are made with extensions and recesses having undercut regions to create clamping action, then stability and self-supporting capability are improved, but the force required to assemble the final pieces becomes excessively great
Solution Approach 1:
The patent applies local quality by differentiating the functions of different regions of the puzzle pieces. The undercut regions provide clamping action for stability, while the circumferential edge portions provide distributed contact points that reduce assembly force. This local differentiation allows each region to optimize its function without compromising the other.
Solution Approach 2:
The patent transitions from a single-dimension clamping mechanism to a multi-dimensional solution by adding circumferential edge portions that create a triangle of forces. This geometric addition in another dimension (spatial arrangement of contact points) transforms the force distribution, reducing the effort needed while maintaining stability.
2Reliability
If puzzle pieces are made with extensive undercut regions to prevent detachment, then reliability of connection is improved, but the complexity of the connecting structure increases
Solution Approach 1:
The patent segments the connecting structure into distinct functional elements: undercut regions for clamping, circumferential edge portions for support, and defined contact regions for force distribution. This segmentation allows each element to perform its specific function efficiently, reducing overall complexity while maintaining reliability.
Solution Approach 2:
Instead of relying solely on extensive undercuts to prevent detachment, the patent inverts the approach by using the circumferential edge portions and triangle of forces as the primary stabilization mechanism. This inverted design reduces the need for complex undercut geometries while achieving equal or superior connection reliability.
3Ease of manufacture
If puzzle pieces are designed to be self-supporting without separate supporting structures, then manufacturing simplicity is improved, but the precision of piece alignment becomes more difficult to achieve
Solution Approach 1:
The patent implements self-service by designing the puzzle pieces to automatically achieve precise alignment through their own geometric features. The circumferential edge portions and defined contact regions guide pieces into correct positioning during assembly, eliminating the need for external alignment tools or complex manufacturing processes.
Solution Approach 2:
The patent applies preliminary action by pre-configuring the circumferential edge portions and contact regions during manufacturing. These pre-formed geometric features automatically perform the alignment function during assembly, ensuring precision is built into the pieces themselves rather than requiring post-manufacturing adjustment.
Data Source
AI summary
The disclosure relates to a jigsaw puzzle having at least two puzzle parts wherein each of the mutually facing circumferential edge sections on both sides of the connecting region and remote from the latter is provided with at least one circumferential edge piece, along which the course of the circumferential edge is defined by the bisector of a two-dimensional angle which is formed between two straight lines which intersect on the bisector and by an upper end point of the associated one of the mutually facing circumferential edge sections of the two puzzle parts to an upper end point of an opposite circumferential edge of the same puzzle part such that when puzzle parts are joined together along mutually facing circumferential edge sections, contact between the two puzzle parts occurs exclusively on said circumferential edge pieces and in the region of the undercut.