Rotating Nested Caps for Controlled Fragrance Emission
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Solution Overview
Problem
Existing fragrance emitting writing utensils lack control over fragrance emission, as they are not capped, leading to unregulated scent release.
Innovation Solution
A writing instrument with an elongate hollow body featuring a marking medium and a scent substrate, equipped with an inner and outer cap system that allows for controlled fragrance emission by rotating the outer cap to cover or expose scent openings, enabling users to adjust or change the fragrance strength and emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fragrance emitting writing utensil is not capped, then the fragrance can be emitted freely, but the fragrance emission cannot be controlled and the cap may be lost or damaged when removed
Solution Approach 1:
The patent employs a nested cap structure where an inner cap and outer cap are disposed concentrically within the hollow body. The inner cap contains scent openings that are covered by the outer cap, creating a nested arrangement that provides controlled fragrance emission while maintaining cap retention through the layered design.
Solution Approach 2:
The patent implements a rotational mechanism where the outer cap can rotate relative to the inner cap between a first position (covering the scent openings to prevent emission) and a second position (revealing the scent openings to allow emission). This dynamic positioning enables users to control fragrance emission on demand without removing the cap entirely.
2Ease of operation
If a removable cap is used to control fragrance emission, then fragrance emission can be controlled, but the cap may be lost or damaged when removed
Solution Approach 1:
The nested cap structure with inner and outer caps provides a retained design where the caps remain integrated within the hollow body. This nested arrangement eliminates the risk of cap loss or damage while still allowing fragrance emission control through the rotational mechanism between the two cap positions.
Solution Approach 2:
The rotational mechanism allows the outer cap to dynamically position itself between covering and revealing the scent openings. This dynamic control provides fragrance emission regulation without requiring the cap to be completely removed, thereby preventing cap loss or damage while maintaining ease of operation.
3Ease of operation
If the outer cap is rotated to cover the scent opening, then fragrance emission is reduced or eliminated, but the mechanism becomes more complex
Solution Approach 1:
The patent employs a simple rotational mechanism where the outer cap rotates relative to the inner cap between two positions. This dynamic positioning provides effective fragrance emission control (covering to prevent emission, revealing to allow emission) while maintaining relatively simple device complexity through the straightforward rotational motion.
Solution Approach 2:
The cap assembly is segmented into an inner cap and an outer cap that can rotate independently relative to each other. This segmentation allows the outer cap to perform the fragrance control function through rotation while the inner cap remains stationary, simplifying the overall mechanism by dividing the functional requirements between separate components.
Data Source
AI summary
A writing instrument includes an elongate hollow body having a distal tip and a proximal end portion, a marking medium located at least partially inside the hollow body and extendible from the distal tip, and a scent substrate in the proximal portion of the hollow body. An inner cap is disposed over the proximal portion. The cap has at least one scent opening. An outer cap is disposed over the inner cap such that rotation of the outer cap relative to the inner cap to a first position covers the at least one scent opening and rotation of the outer cap relative to the inner cap to a second position reveals the at least one scent opening.