Dual-Housing Insertion Device With Torsion Spring Cam Mechanism
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Solution Overview
Problem
Existing medical infusion systems, particularly for diabetes treatment, face challenges in minimizing trauma during needle insertion, as manual insertion can be painful, and existing quick-insertion mechanisms may not provide a steady, controlled insertion for all patients.
Innovation Solution
A dual-housing insertion system with a torsion spring and cam assembly mechanism that rotates to move a carrier body from a retracted to an advanced position, allowing a piercing member to be inserted through the skin in a controlled and steady manner, reducing trauma and improving patient comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a spring mechanism is used to force the needle to move quickly from retracted to extended position, then the insertion speed is improved, but the trauma to the patient worsens due to abrupt motion
Solution Approach 1:
The patent applies the dynamics principle by making the carrier body movable between retracted and extended positions through a controlled mechanical mechanism. The torsion spring provides rotational force that is converted into controlled linear motion of the carrier body, enabling the needle to move dynamically from retracted to extended position at a controlled rate rather than being fixed in one position or moving abruptly.
Solution Approach 2:
The patent uses the carrier body as an intermediary mechanism between the torsion spring and the needle. The cam assembly acts as another intermediary that translates the rotational motion of the torsion spring into the linear motion of the carrier body, which in turn moves the needle. This multi-stage intermediary system allows for controlled, steady motion that reduces patient trauma while still achieving quick insertion.
2Object-affected harmful factors
If manual insertion is used, then the insertion is slow and steady, but the trauma to the patient increases due to prolonged exposure
Solution Approach 1:
The patent implements periodic action through the torsion spring mechanism that rotates back and forth between orientations, driving the carrier body to move repeatedly between retracted and extended positions. This periodic mechanical action enables the needle to be inserted quickly while maintaining controlled, steady motion that minimizes patient trauma, avoiding both the abruptness of pure spring thrust and the slowness of manual insertion.
Solution Approach 2:
The patent replaces the purely manual mechanical insertion system with an automated mechanical system using a torsion spring and cam assembly. This substitution eliminates the need for manual manipulation while providing controlled, steady motion through the carrier body mechanism, achieving both speed and patient comfort that neither manual nor abrupt spring-based systems can provide alone.
3Adaptability or versatility
If a single housing design is used, then the device complexity is reduced, but the adaptability and reusability are limited
Solution Approach 1:
The patent applies segmentation by dividing the device into two separate housings: a first housing containing the carrier body and needle assembly, and a second housing containing the torsion spring and cam assembly. This segmentation allows the first housing with the needle to be disposable while the second housing with the reusable mechanical mechanism can be retained and reused with new needle assemblies, enhancing adaptability and reducing waste.
Solution Approach 2:
The patent implements universality through the reusable second housing containing the torsion spring and cam assembly mechanism. This mechanism can work with multiple different needle assemblies and patient bases, making the core insertion mechanism universal and reusable across multiple applications. The separable housing design allows the universal mechanism to be paired with different disposable components for various uses.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides a reliable and minimally traumatic method for inserting needles or cannulas, ensuring consistent placement and reducing patient discomfort, while allowing for adjustable settings and reusable components.
Implementation Method 1
The drive mechanism comprises a torsion spring member and a cam assembly
Data Source
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AI summary
An insertion device may include a base adapted to be carried by a patient, and a housing attached to the base, the housing having a fluid connector arranged for movement relative to the base. A pair of interactive elements including a first interactive element may be supported on the base and a second interactive element supported on the housing at a location to be interactable with the first interactive element when the fluid connector is moved to a predetermined position. Circuitry may be configured to detect an interaction between the first interactive element and the second interactive element when the fluid connector is in the predetermined position, the circuitry configured to provide a signal or a change in state in response to detecting the interaction between the first interactive element and the second interactive element.