Integrated Injection Device with Variable Reciprocation Mechanism
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Solution Overview
Problem
Conventional insulin administration devices for diabetic patients are cumbersome due to the separate units for puncture, measurement, and injection, making them difficult to carry and use effectively.
Innovation Solution
An integrated injection device with a puncture function that combines a cartridge for chemical solutions, a reciprocating mechanism, and an extrusion system within a single casing, allowing variable motion speed and amount for both puncture and administration, using a single hollow metal needle for both functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate units are used for puncture, measurement, and injection, then each unit can be optimized for its specific function, but the overall device becomes cumbersome and difficult to carry
Solution Approach 1:
The patent combines the puncture unit, measurement unit, and injection unit into a single integrated device. The housing contains all three functional units, allowing the device to be carried as one compact unit while maintaining the optimized functionality of each sub-unit through dedicated components (puncture needle, sensor, cartridge, plunger)
Solution Approach 2:
The device performs multiple functions (puncture, blood collection, glucose measurement, and insulin injection) within a single integrated system. The control unit coordinates all functions, and the single device replaces multiple separate medical devices, making it universally applicable for complete diabetes management
2Reliability
If multiple separate units are used, then each unit can be independently optimized, but the user burden increases and errors may occur during transfer of data between units
Solution Approach 1:
The patent integrates all functional units (puncture, measurement, injection) into one device with a unified control unit. This eliminates the need for users to manually transfer data between separate units, reducing operational burden and potential errors while maintaining functional optimization through dedicated components
3Ease of operation
If a single integrated device is used, then portability and ease of use are improved, but the device structure becomes more complex
Solution Approach 1:
The integrated device is segmented into distinct functional modules: puncture unit with needle, measurement unit with sensor, injection unit with cartridge and plunger, and control unit. This modular segmentation allows complex functions to be organized into manageable sections within the single housing, maintaining portability while managing integration complexity
4Manufacturing precision
If variable motion speed and amount are used for reciprocation, then precise control of puncture and administration is achieved, but the control mechanism becomes more complex
Solution Approach 1:
The reciprocation mechanism is designed with variable motion characteristics, where the speed and amplitude of reciprocation can be adjusted based on the operational phase (puncture vs. administration). The control unit dynamically adjusts the motor parameters to achieve precise dose control during administration while maintaining simplicity of the underlying mechanical reciprocating structure
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 enables easy portability and accurate insulin administration by integrating blood collection, measurement, and injection functions, reducing user burden and minimizing errors through automated data storage and precise dose control.
Implementation Method 1
the reciprocation means includes a pinion and a rack, the pinion is rotated to reciprocate the cartridge and the cartridge holder in a direction along the needle
Implementation Method 2
the extrusion means includes a first motor, a first rpm/linear motion conversion unit which is disposed between a rotation axis of the first motor and a piston that pushes the rear end of the cartridge
Data Source
AI summary
An injection device with a puncture function includes, in a single casing, a cylindrical cartridge in which insulin is enclosed, a cartridge holder to which the cartridge is inserted, a needle inserted at a front end of the cartridge, a reciprocation unit for reciprocating the cartridge toward the needle, and an extrusion member for extruding the insulin from a rear end of the cartridge toward the needle, and the motion speed and the motion amount of the reciprocation unit are made variable.