Refillable Eraser Case with Segmented Bands
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Solution Overview
Problem
Conventional pencil eraser holders do not allow for efficient and continuous reuse of erasers, leading to waste and environmental pollution, as they require frequent replacement rather than refilling.
Innovation Solution
A refillable pencil eraser case with removable connecting bands that can be reassembled to maintain the length of the eraser holder, allowing for the easy replacement and refilling of erasers by removing and reattaching bands as the eraser wears down.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pencil eraser holders are used, then the holder structure is simple and easy to manufacture, but the eraser cannot be reused and must be frequently replaced, leading to waste
Solution Approach 1:
The eraser holder is divided into multiple detachable bands (first band, second band, third band) that can be separated and reassembled. This segmentation allows the eraser to be accessed and replaced while keeping the holder structure, enabling reuse of the holder body while managing the complexity through modular design.
Solution Approach 2:
The holder structure incorporates dynamic elements where bands can be detached and reattached. The bands feature interlocking mechanisms (protrusions and recesses) that allow the structure to transition between assembled and disassembled states, providing the functionality needed for eraser replacement while maintaining overall structural integrity.
2Duration of action of moving object
If the eraser holder is made refillable with detachable bands, then the eraser can be reused indefinitely, but the structure becomes more complex requiring multiple bands and reassembly mechanisms
Solution Approach 1:
The holder is segmented into multiple bands that can be independently handled. The first band contains the eraser, while the second and third bands can be detached to access the eraser for replacement, then reassembled to restore the holder's protective structure.
Solution Approach 2:
The bands are designed to nest within each other when detached, with each band having a hollow interior that can contain the next band. This nesting arrangement minimizes the space required for storage and transport of the disassembled holder components.
3Length of stationary object
If bands are removed and reassembled to maintain holder length, then the holder length is maintained, but the operation becomes more complex requiring removal and reattachment of bands
Solution Approach 1:
The holder is divided into separable bands that can be individually removed and reassembled in the same sequence. This segmentation allows the bands to be taken apart for eraser access and reconnected to restore the original holder length and structure.
Solution Approach 2:
The bands are designed with reversible interlocking features where protrusions on one band fit into recesses on the adjacent band. This inversion symmetry allows the bands to be easily detached and reattached in the same configuration, maintaining the original holder dimensions.
Data Source
AI summary
A holder for a pencil eraser with removable bands. As the eraser wears, connecting bands are removed, revealing more of the eraser. As the connecting bands are removed, they are replaced at the rear end so that the length of the eraser case remains the same. When the eraser is completely worn out, a new eraser is inserted in the eraser case.