Multi-Arm Ratchet Drive for Incremental Drug Infusion Control
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Solution Overview
Problem
Existing drug infusion devices lack flexibility in controlling the infusion process and have inefficient infusion efficiency, leading to significant fluctuations in substance concentrations in the patient's body fluid.
Innovation Solution
A drug infusion device with a driving unit featuring multiple driving arms that allows for adjustable pivoting movements, enabling tooth-number adjustable driving on the driving wheel, and incorporating ratchet teeth to prevent reverse rotation, allowing for flexible control of the infusion process and reducing the minimum infusion amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single driving arm is used to drive the driving wheel, then the device structure is simple, but the infusion increment cannot be adjusted and the infusion efficiency is low
Solution Approach 1:
The driving unit is segmented into multiple driving arms (at least two) that can independently engage with the driving wheel at different positions. Each driving arm can be controlled to engage or disengage separately, allowing the driving wheel to rotate by different numbers of gear teeth increments,从而实现可调速输液
Solution Approach 2:
The driving arms are designed to be movable relative to the driving unit body, allowing dynamic engagement and disengagement with the driving wheel. This dynamic control enables flexible adjustment of the driving wheel rotation angle, providing multiple infusion rate options without changing the overall device structure
2Measurement precision
If the minimum infusion dose is large, then the device structure is simple, but the concentration control precision deteriorates
Solution Approach 1:
The driving wheel is divided into multiple gear teeth with different engagement positions. By engaging different numbers of gear teeth through multiple driving arms, the system can deliver precise small increments of drug volume, reducing the minimum infusion dose and improving concentration control precision
Solution Approach 2:
The system changes the rotation angle parameter of the driving wheel by controlling different driving arms to engage different numbers of gear teeth. This parameter adjustment allows precise control of the piston displacement and consequently the drug infusion volume, enabling accurate substance concentration control
3Adaptability or versatility
If the driving unit pivots in a fixed direction only, then the mechanism is simple, but the infusion flexibility is limited
Solution Approach 1:
The driving unit is designed with pivoting capability in at least two different directions. The driving arms can be controlled to pivot the driving unit left or right, allowing the driving wheel to rotate clockwise or counter-clockwise. This bidirectional pivoting provides flexible control over the infusion process, enabling the system to adapt to different infusion requirements
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 device achieves flexible and precise control of the infusion process, reducing substance concentration fluctuations and improving infusion efficiency by allowing patients to adjust infusion rates and doses accurately.
Implementation Method 1
a piston and a driving wheel respectively connected with a screw, the driving wheel drives the screw movement by rotation
Implementation Method 2
the power unit exerts a force on the driving unit to lead the driving unit to perform adjustable pivoting movements
Data Source
AI summary
This invention discloses a drug infusion device, including: a drug storage unit; a piston and a driving wheel respectively connected with a screw, the driving wheel drives the screw to move by rotation, the piston is arranged in the drug storage unit, the screw advances the piston to move; a driving unit cooperating with the driving wheel, the driving unit includes more than two driving arms, the driving unit, through the multiple pivoting movement modes, drives driving arms to perform tooth number adjustable driving on the driving wheel for increment-adjustable infusion; and a power unit connected to the driving unit, the power unit exerts a force on the driving unit to lead the driving unit to perform a plurality of pivot steps. More than two driving arms are stalled on the driving unit, thereby achieving multi-level engagement on the driving wheel, and finally achieving the purpose of increment-adjustable infusion.