Automatic Injection Device Syringe Carrier with Visual Inspection Window
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Solution Overview
Problem
Existing automatic injection devices lack features for inspecting contents and indicating injection completion, particularly for varying dose volumes, limiting their usability for different therapeutic agents.
Innovation Solution
An automatic injection device with a housing featuring an elongated window for content viewing, a syringe carrier that displaces the syringe between positions to align with the window and a visual indicator for dose completion, and a syringe carrier design with legs to prevent movement towards the injection site until actuated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the syringe carrier is designed to allow free movement of the syringe, then the device structure is simpler, but the syringe may move unintentionally towards the injection site causing premature injection
Solution Approach 1:
The syringe carrier includes a pair of legs that extend into engagement with interior stops on the housing to prevent movement of the syringe toward the injection site. This preliminary constraint mechanism actively counteracts any unintended forward movement before injection is intended, ensuring the syringe remains in its initial position until the firing mechanism is activated.
2Strength
If the housing is made opaque for protection, then durability is improved, but users cannot visually inspect the contents before injection
Solution Approach 1:
The housing includes a transparent window portion that allows users to visually inspect the syringe contents, dosage information, and injection status. This localized transparency is integrated into the otherwise protective housing structure, providing visual access at specific locations where it is most needed while maintaining the overall durability and protection of the device.
Solution Approach 2:
The plunger includes a visual indicator that changes position or becomes visible through the transparent window to indicate injection completion. This visual feedback mechanism allows users to confirm that the injection has been administered without compromising the protective housing structure.
3Loss of information
If the syringe carrier allows viewing of contents at all positions, then user awareness is improved, but the device structure becomes more complex
Solution Approach 1:
The syringe carrier is designed with a segmented structure including a pair of legs that can be independently positioned. These legs are spaced apart to define an opening that aligns with the transparent window on the housing, allowing visual access to the syringe contents at specific critical positions during the injection process without requiring the entire carrier to be transparent or complexly articulated.
Data Source
AI summary
A syringe carrier for use within an automatic injection device includes a substantially tubular body having a first end, a middle portion, and a second end, configured to contain a portion of a syringe and displace the syringe within a housing of the automatic injection device from a first position to a second position; a first pair of legs defining at least a portion of a front opening in the substantially tubular body proximal to the first end; a second pair of legs defining at least a portion of a rear opening in the substantially tubular body proximal to the first end; and a syringe carrier coupler having a first beam and a second beam extending from the middle portion partially beyond the first pair of legs at the first end of the substantially tubular body.