Self-Administered Injection Device With Two-Stage Safety Mechanism
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Solution Overview
Problem
Existing injectable substances like botulinum toxin, typically administered by trained professionals, require precise location and dosage, making self-administration difficult for untrained individuals due to lack of familiarity and frequent use.
Innovation Solution
A self-administration system comprising an injection device with a two-stage mechanism, pre-filled cartridges, and a staging tray, along with injection patches, allowing users to safely and accurately administer substances like botulinum toxin without professional guidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If injections are administered by trained professionals to ensure precise location and dosage, then injection accuracy and safety are improved, but user convenience and accessibility deteriorate
Solution Approach 1:
The injection device enables self-service administration through automated needle insertion and solution delivery mechanisms. The user simply positions the device and activates it, while the internal hammer and plunger systems automatically complete the injection process, eliminating the need for manual needle handling or dosage calculation.
Solution Approach 2:
The device performs preliminary actions by pre-assembling the needle, cartridge, and plunger components in precise configurations before use. The safety mechanism is pre-configured to ensure proper alignment, and the hammer mechanism is pre-loaded to deliver the exact injection depth and force required for accurate administration.
2Reliability
If a safety mechanism is implemented to prevent accidental injection, then user safety is improved, but device complexity increases
Solution Approach 1:
The safety mechanism implements preliminary anti-action by blocking the hammer's path before accidental injection can occur. The safety tab physically obstructs the hammer until properly positioned, preventing any unintended needle insertion or solution delivery while maintaining a relatively simple overall device structure.
3Reliability
If a two-stage system with hammer and plunger is used to ensure complete needle insertion and solution delivery, then injection reliability is improved, but device complexity increases
Solution Approach 1:
The device merges the hammer insertion mechanism and plunger delivery mechanism into a single integrated cartridge assembly. Both functions are combined in one component that is inserted and activated simultaneously, reducing the number of separate parts while maintaining the two-stage injection process for reliable needle insertion and solution delivery.
Data Source
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Figure 3A~3B
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AI summary
An injection device kit for the self-administration of an injection of solution that includes a body portion configured for engagement with a cartridge containing the solution and an injection needle where the body portion includes an injection component having an actuation mechanism for inserting the injection needle of the cartridge and for injecting the solution in the cartridge and a safety mechanism on the body portion and configured to prevent injection unless released.