Dose Dial Locking for Precise Drug Injection Control
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Solution Overview
Problem
Existing drug injection devices face issues such as pain from frequent injections, skin rash, blockage, drug residual amount, size and weight of insulin pumps, high cost, and hypoglycemia and skin pain from insulin pens, necessitating a solution for precise and pain-free drug delivery.
Innovation Solution
A drug injection device with a deceleration unit, rotation detection module, and locking mechanism that allows precise control of drug dosage through a dial system, ensuring one-directional rotation and automatic locking at set values, integrated with a mobile app for dose monitoring and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional drug injection devices are used for frequent long-term injection, then drug delivery function is maintained, but patient experiences pain and exposure of medical history
Solution Approach 1:
The injection device is divided into multiple disposable patches that can be applied to different locations on the body. Each patch contains a separate drug container and needle array, allowing patients to rotate between multiple patches. This segmentation enables long-term treatment without repeated injections at the same site, reducing pain and skin damage while maintaining effective drug delivery over extended periods.
2Measurement precision
If conventional injection devices are used, then basic drug delivery is achieved, but fine adjustment of injection dosage is difficult
Solution Approach 1:
The device transitions from single-needle to multi-needle arrays arranged in specific patterns. By controlling the activation of individual needles or needle groups within the array, the system achieves fine-grained dosage adjustment. This spatial arrangement in multiple dimensions allows precise control of drug delivery quantity without requiring complex mechanical adjustment mechanisms, as dosage can be modulated by selecting which needles to activate rather than adjusting a single needle's parameters.
3Object-affected harmful factors
If patch-type drug injection devices are used, then repeated injection at same location is avoided, but skin rash and blockage occur
Solution Approach 1:
The needle array is segmented into multiple independent or independently controllable units. This segmentation allows the system to distribute injections across multiple needles rather than concentrating force on a single needle, reducing skin trauma and rash. When one needle becomes blocked, others remain functional, maintaining injection reliability. The segmented design also enables better heat dissipation and reduced local tissue stress.
4Ease of operation
If insulin pens are used, then portability is achieved, but hypoglycemia risk occurs in case of abnormal injection
Solution Approach 1:
The patch-type device incorporates sensors that monitor injection parameters in real-time, such as needle penetration depth, drug delivery rate, and tissue resistance. This feedback mechanism detects abnormal injection conditions and can alert the patient or automatically adjust parameters to prevent hypoglycemia. The device provides continuous monitoring and control throughout the injection process, ensuring safety while maintaining the portability and ease of use characteristic of insulin pens.
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
Enables precise and pain-free drug delivery with manual control and automatic locking, reducing the risk of over-injection and skin irritation, while allowing easy adjustment and monitoring of drug doses.
Implementation Method 1
an electromagnet configured to generate a magnetic force in response to a current flowing in a forward direction or a reverse direction
Implementation Method 2
a magnetic sensor configured to detect a rotation value of the deceleration unit based on a change in a magnetic field
Data Source
AI summary
A disclosed drug injection device includes: a case having a drug container located therein at one side; and a discharge amount adjustment module that is provided at the other side inside the case and, while rotating by a set angle only in one direction, adjusts a discharge amount of a drug stored in the drug container while speed is reduced by a speed reduction unit consisting of a combination of gears; a rotation amount detection module that detects a rotation value of the speed reduction unit and transmits detected data to a control device; and a locking module for locking to restrict rotation of the speed reduction unit when the rotation value detected by the rotation amount detection module reaches a set value.