Inhaler Shell Rim Cut-Out and Mating Support for Snap-Fit Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Inhalers with a complete rim for structural support make it difficult to remove the capsule holder and are prone to breakage due to thin parts above the aperture, compromising user friendliness and stability.
Innovation Solution
An inhaler design with a first shell part having a cut-out in the rim and a support system using mating parts to prevent outward movement of the shell walls, maintaining a secure snap-fit connection while allowing easy removal, featuring a double-skinned wall and strategically placed protrusions and recesses for enhanced rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a complete rim is provided in the first shell part to provide structural support, then the stability and strength of the shell are improved, but the ease of removing the capsule holder deteriorates and the rim becomes prone to breakage due to thin parts above the aperture
Solution Approach 1:
The rim is segmented into two distinct regions: a complete upper rim portion that provides structural support and stability, and a cut-out lower rim portion that facilitates easy removal of the capsule holder. This segmentation allows each region to fulfill its specific function without compromising the other.
Solution Approach 2:
Different portions of the rim are given different structural qualities - the upper rim maintains full thickness and continuity for strength, while the lower rim has a cut-out configuration for ease of operation. The aperture is positioned to provide local access without compromising overall rim integrity.
2Ease of operation
If a cut-out is provided in the rim to allow easy removal of the capsule holder, then the ease of operation is improved, but the stability and reliability of the snap-fit connection deteriorates due to flexibility
Solution Approach 1:
The rim is divided into a complete upper portion that maintains structural integrity for reliable snap-fit connection and a cut-out lower portion that enables easy removal. This segmentation ensures that the critical connection area remains stable while the removal area remains accessible.
Solution Approach 2:
The aperture is strategically positioned and sized to provide local access for removal operations without creating excessive flexibility in the critical snap-fit connection regions. The rim thickness and material distribution are optimized locally to maintain reliability where needed.
Data Source
AI summary
An inhaler for inhalation of an inhalable dry powder is provided. The inhaler has (a) an outer shell having a first shell part and a second shell part; (b) a capsule holder having a chamber for holding a capsule, a capsule breaker for breaking open a capsule held within the chamber and a trigger for causing the capsule breaker to break open a capsule; (c) a support for supporting the capsule holder; and (d) an outlet for passage of dry powder from the capsule into a user. The capsule holder is positioned in the first shell part which has an aperture through which the trigger protrudes. The aperture has a cut-out in the rim of the first shell part and through which the trigger may pass when the capsule holder is removed from the first shell part. The support has one or more first mating parts for mating with one or more second mating parts on the first shell part, the first and second mating parts preventing outward movement of the walls of the first shell part when the first and second mating parts are mutually engaged.