Rotating Holder Needle Assembly for Minimizing Skin Trauma
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Solution Overview
Problem
Existing liquid medicine injection apparatuses for diabetic patients, particularly pediatric patients, face challenges in providing a safe, simple, and precise method for injecting medical liquids, such as insulin, with a needle assembly that is comfortable to wear, convenient to use, and durable, while ensuring low power consumption and minimizing skin damage.
Innovation Solution
A needle assembly with a holder that rotates to move the needle and cannula in multiple directions, utilizing a driving member and sliding members with catching mechanisms, allowing for efficient insertion and withdrawal of the needle while maintaining the cannula in place for continuous medication delivery, and a liquid medicine injection apparatus with a reservoir unit and driving module for controlled medication administration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the needle assembly uses a simple linear insertion mechanism, then the device complexity is reduced, but the ability to minimize skin damage and ensure safe injection is compromised
Solution Approach 1:
The needle assembly employs a dynamic rotating holder mechanism that allows the needle to be inserted at an optimal angle and then rotated to a parallel position with the skin surface. This dynamic adjustment enables the needle to minimize skin damage during insertion while maintaining a simple overall device structure.
Solution Approach 2:
The invention introduces rotational movement as an additional dimension to the traditional linear insertion mechanism. By rotating the holder after insertion, the needle transitions from an angled insertion path to a parallel position, reducing skin trauma without requiring complex multi-component systems.
2Manufacturing precision
If the holder rotates to move the needle in multiple directions, then the injection precision and safety are improved, but the device complexity increases
Solution Approach 1:
The holder is designed as a rotatable component that can dynamically adjust the needle's orientation. This single rotational degree of freedom provides the necessary precision for safe injection while avoiding the complexity of multiple actuators or complex mechanical linkages.
Solution Approach 2:
The rotating holder mechanism is designed to be self-contained, where the holder itself performs the rotation function without requiring separate control mechanisms. The driving member integrates with the holder structure, allowing the system to achieve precise needle positioning through its own components rather than external complexity.
3Ease of operation
If the needle and cannula are moved together during insertion, then the operation is simplified, but the ability to maintain cannula position for continuous medication delivery is reduced
Solution Approach 1:
The system separates the needle and cannula into distinct components with independent movement capabilities. The needle can be inserted through the skin while the cannula remains positioned for medication delivery, allowing each component to perform its specific function without interfering with the other's stability.
Solution Approach 2:
The mechanism allows for dynamic separation of needle and cannula movements. During insertion, both move together for simplicity, but after insertion, the needle can be retracted or repositioned independently while the cannula maintains its position, ensuring continuous medication delivery capability.
4Manufacturing precision
If the device is designed for precise control of medication delivery, then the manufacturing precision is improved, but the ease of operation for ordinary users is reduced
Solution Approach 1:
The device incorporates automatic control mechanisms that perform precise medication delivery without requiring complex user manipulation. The driving member and holder mechanism automatically execute the insertion, rotation, and medication delivery sequence, providing precision control while maintaining simplicity for the user.
Solution Approach 2:
The device is pre-configured with the needle, cannula, and driving mechanisms in optimal positions before use. This preliminary setup allows the device to automatically perform precise medication delivery when activated, eliminating the need for users to manually adjust precision-critical components.
Data Source
AI summary
A needle assembly includes a needle, a cannula into which the needle is inserted, a driving member generating driving force to move the needle and the cannula, and a holder on which the driving member is supported, in which the holder rotates to move the needle and the cannula in a direction, and the holder further rotates to move the needle in another direction.