Safety Cap Assembly With Segmented Shield Remover Attachment
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Solution Overview
Problem
Existing medicament delivery devices face challenges in the assembly and attachment of safety caps due to tight tolerances and precise alignment requirements, which complicate the integration of the medicament delivery member shield remover with the cap body.
Innovation Solution
A protective cap arrangement featuring a tubular body with a medicament delivery member shield remover held in place by an attachment element, allowing easy assembly through a passage with circumferential flanges and snap-fit mechanisms, simplifying the insertion and attachment process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional attachment elements (tongues or ledges on inner surface interacting with grooves or cut-outs) are used to connect the remover to the cap body, then the medicament delivery member shield can be removed effectively, but the assembly process requires tight tolerances and precise alignment making it complex
Solution Approach 1:
The attachment element is segmented into a proximal portion received by the cap body and a distal portion extending into the shield, allowing independent positioning of each segment. This segmentation enables the attachment element to function effectively without requiring tight tolerances between the remover and cap body, as each segment can be positioned independently during assembly.
Solution Approach 2:
The attachment element acts as an intermediary component between the remover and the shield, transferring the pulling force from the cap to the shield. By introducing this intermediate element with its specific geometry (proximal portion for cap engagement, distal portion for shield engagement), the system achieves reliable shield removal without requiring precise alignment between the remover and cap body.
2Reliability
If traditional attachment elements requiring precise alignment are used, then the remover can be attached to the cap body, but the assembly process becomes time-consuming and requires tight tolerances
Solution Approach 1:
The attachment element is divided into functional segments (proximal portion for cap engagement, distal portion for shield engagement) that can be positioned independently. This allows the remover to be attached to the cap body without requiring precise alignment, significantly reducing assembly time while maintaining attachment reliability through the segmented design.
Solution Approach 2:
The attachment element is designed to self-align and self-engage with the cap body and shield through its geometric features. The proximal portion automatically engages with the cap body interior, and the distal portion engages with the shield, eliminating the need for precise manual alignment during assembly and reducing assembly time.
3Ease of manufacture
If the remover is inserted from the distal end with traditional attachment elements, then connection can be made, but the process requires precise alignment and tight tolerances
Solution Approach 1:
Instead of inserting the remover from the distal end and requiring alignment of attachment elements, the design inverts the approach: the attachment element's proximal portion is designed to be received by the cap body from the proximal end, with the distal portion naturally engaging the shield. This inversion eliminates the need for precise alignment during assembly, improving ease of manufacture.
Solution Approach 2:
The attachment element is segmented to allow the proximal portion to engage the cap body independently of the distal portion's engagement with the shield. This segmentation enables simple insertion from the proximal end without requiring tight tolerances or precise alignment, making the manufacturing process easier.
Data Source
AI summary
A protective cap is presented that is releasably connected to a medicament delivery having a generally tubular body and a medicament delivery member with a shield to be removed when the protective cap is removed, attachment elements for holding a generally tubular medicament delivery member shield remover within the protective cap and a lid attached to the cap body for holding the medicament delivery member shield remover in position.