Two-Step Automatic Injection Device with Finger Placement Guidance
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Solution Overview
Problem
Two-step type automatic injection devices face risks of mis-operations, such as administering drugs to unintended sites like fingers due to mistaken pressing of the pressing member, and there is a need for safer and more convenient administration methods.
Innovation Solution
Incorporating a finger placement preventing or controlling means and a pressing direction guiding means into the automatic injection device, such as indications on the device surface or labels, to guide correct gripping and pressing, thereby reducing the risk of mis-operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a two-step type automatic injection device is used to simplify operations, then ease of operation is improved, but reliability deteriorates due to increased risk of mis-operations such as administering to fingers
Solution Approach 1:
The device applies preliminary anti-action by providing visual indications (colored zones, symbols, text) that warn users in advance against placing fingers on the pressing end portion. These indications create a preventive mental model before the injection action occurs, reducing the likelihood of mis-operations while preserving the simple two-step operation flow
2Reliability
If visual indications are added to guide correct gripping and pressing, then reliability is improved, but device complexity increases
Solution Approach 1:
The device uses color changes as a visual indication system, with a first colored zone (e.g., red) at the pressing end portion to warn against finger placement and a second colored zone (e.g., green or blue) at the gripping end portion to indicate correct gripping location. This color-coding system provides intuitive guidance without adding mechanical or electronic complexity
Solution Approach 2:
The device segments the housing into distinct colored zones with different functions: a first colored zone for warning (pressing end), a second colored zone for guidance (gripping end), and a third colored zone for neutral areas. This segmentation allows clear visual differentiation of functional areas without complicating the overall device structure
Data Source
AI summary
A two-step type automatic injection device including a means of automatically subcutaneously administering a drug solution with pressing a pressing member provided at one of end portions against an administration site, the automatic injection device including a means of preventing or controlling from placement of a finger on an end portion thereof. The automatic injection device of the present invention is very useful in pharmaceutical industries.