Patch Pump Layout for Stable Cannula Insertion Under Movement
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Solution Overview
Problem
Existing insulin injectors face detachment issues due to user movement or external impacts, leading to unstable drug delivery.
Innovation Solution
A patch-type drug injection device with a central injection assembly, where the drug reservoir, pump assembly, and circuit unit surround the injection assembly, minimizing overlapping components to reduce thickness and enhance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the injection assembly is positioned at a central region with components surrounding it, then the stability of insertion is improved, but the device complexity increases
Solution Approach 1:
The device is divided into distinct functional modules: drug reservoir, pump assembly, circuit unit, and injection assembly. Each module is independently positioned and connected, allowing the injection assembly to be centrally located for stability while other components are arranged around it in a segmented configuration, reducing overall complexity
Solution Approach 2:
The patent employs a nested arrangement where the injection assembly is centrally positioned and surrounded by the drug reservoir, pump assembly, and circuit unit. This nested configuration allows the injection assembly to maintain central stability while components are compactly arranged around it, optimizing space utilization without significantly increasing complexity
2Ease of operation
If components are minimized and arranged to reduce thickness, then the ease of operation is improved, but the manufacturing precision requirements increase
Solution Approach 1:
By segmenting the device into distinct modules (drug reservoir, pump assembly, circuit unit, injection assembly), each component can be manufactured separately with standard tolerances and then assembled. This modular approach reduces the need for extremely high manufacturing precision across the entire device while maintaining thin overall dimensions that ease attachment to the user
Solution Approach 2:
The patent transitions from a planar component arrangement to a three-dimensional stacked configuration. Components are arranged in multiple layers and depths, with the injection assembly centrally positioned and other components surrounding it in the vertical and radial dimensions. This dimensional change allows for reduced thickness in the primary attachment direction while distributing component complexity across multiple spatial dimensions
Data Source
AI summary
A patch-type drug injection pump according to an embodiment of the present disclosure includes: a housing including a lid and a contact surface; and components disposed in a mounting space between the lid and the contact surface. The components include: a drug reservoir in which a drug to be injected is stored; a pump assembly configured to be driven to transfer the drug in the drug reservoir toward an injection target; a circuit unit equipped with electronic components necessary for driving and controlling the pump; and an injection assembly equipped with an insertion tube to be inserted into the injection target. The injection assembly is disposed at a central region of the mounting space. Further, the drug reservoir, the pump assembly, and the circuit unit are disposed to surround the injection assembly.