Injection Device Fastener for Supplementary Device Attachment
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Solution Overview
Problem
Existing drug delivery devices lack a simple and effective way to securely attach and detach supplementary devices, such as data logging devices, to injection devices without modifying the housing, which is necessary for accommodating various types of supplementary devices and ensuring user safety and convenience.
Innovation Solution
The integration of a fastener within the injection device's housing that provides a mechanical fastening interface for supplementary devices, allowing for easy assembly and disassembly, and potentially serving additional functions like dose indication or sealing, without requiring modifications to the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a supplementary device is attached to an injection device, then monitoring functionality is improved, but device complexity increases
Solution Approach 1:
The system is divided into two separate components: the injection device and the supplementary monitoring device. The fastening structure on the injection device provides a standardized interface that allows attachment of the supplementary device without integrating its monitoring functions into the injection device itself. This segmentation maintains monitoring capabilities while avoiding the complexity increase that would result from integrating all monitoring functions into the injection device.
2Reliability
If the housing is modified to accommodate a fastening mechanism, then attachment reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The fastening structure is extracted as a separate component from the housing. Instead of modifying the housing itself to include the fastening mechanism, a dedicated fastening structure is provided on the housing that interfaces with a corresponding structure on the supplementary device. This extraction allows the housing to be manufactured separately with simpler geometry, while still achieving reliable attachment through the specialized fastening interface.
3Adaptability or versatility
If a standardized fastening mechanism is provided, then adaptability is improved, but device complexity increases
Solution Approach 1:
The fastening structure on the injection device is designed as a universal interface that can accommodate different types of supplementary devices through a standardized connection mechanism. The fastening structure itself remains simple and unchanged, while its versatility is achieved through the standardized interface that can connect to various supplementary device types, thus improving adaptability without increasing the complexity of the fastening structure itself.
Data Source
AI summary
An injection device includes: a housing configured to accommodate a medicament container filled with the medicament, a drive mechanism, and a fastener. The housing includes a sidewall with a recess. The drive mechanism is operably engageable with the medicament container for injecting the dose of the medicament. The fastener is arranged inside the recess and protrudes outwardly from an outside surface of the housing. The fastener includes a fastening structure complementary shaped to a counter fastening structure of a counter fastener of a supplementary device for fastening and/or fixing the supplementary device in a predefined position to the housing.