Universal Drug Injection Device with Nesting Cartridge Adapter
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Solution Overview
Problem
Existing drug injection devices require multiple devices for different types of drugs, leading to inefficiencies in switching between them due to the need to reset the piston position and control the dosage accurately, which increases time and battery consumption.
Innovation Solution
A drug injection system with a cartridge adapter that accommodates multiple types of drug cartridges, featuring a piston driving mechanism with a male and female thread system, identification information for cartridge type recognition, and a mechanism to quickly switch between cartridges without repositioning the piston, allowing for immediate injection readiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple drug injection devices are used for different types of drugs, then each device can be dedicated to a specific drug cartridge, but the time required for switching between devices and resetting piston positions increases
Solution Approach 1:
The drug injection device is designed with a universal main body that can accommodate multiple types of drug cartridges through a standardized cartridge holder interface. The piston driving mechanism is configured to work with different cartridge types without requiring device replacement, enabling one device to perform multiple injection functions.
Solution Approach 2:
The cartridge adapter is nested within the main body of the injection device, creating a hierarchical structure where the adapter provides type-specific accommodation while the main body provides universal functionality. This nested arrangement allows quick cartridge type changes without affecting the core injection mechanism.
2Reliability
If multiple drug injection devices are used for different types of drugs, then each device can be optimized for its specific drug, but battery consumption increases due to multiple devices
Solution Approach 1:
A single injection device main body is designed to universally support multiple drug cartridge types, eliminating the need for multiple separate devices. This consolidation reduces overall battery consumption while maintaining drug-specific optimization through the cartridge adapter interface.
3Measurement precision
If multiple drug injection devices are used for different types of drugs, then each device can maintain accurate dosage control, but device complexity and portability are reduced
Solution Approach 1:
The injection device employs a universal main body with standardized dosage control mechanisms that work across different cartridge types. The cartridge adapter ensures proper mechanical coupling while the main body's piston driving mechanism maintains accurate dosage delivery regardless of cartridge type, reducing the need for multiple specialized devices.
Solution Approach 2:
The system is segmented into a universal main body component and interchangeable cartridge adapter components. This segmentation allows the complex dosage control functionality to be centralized in the main body while the adapters remain simple type-specific interface elements, managing overall system complexity.
4Measurement precision
If piston repositioning is performed when switching between drug cartridges, then dosage accuracy can be maintained, but time and battery consumption increase
Solution Approach 1:
The cartridge adapter is pre-configured with mechanical features that automatically align and position the piston at the correct starting position during the cartridge insertion process itself, eliminating the need for separate repositioning operations. The adapter's design ensures proper piston positioning is achieved as a preliminary action before injection begins.
Solution Approach 2:
The cartridge adapter mechanism automatically performs the piston positioning function through its own structural design, without requiring external actuation or separate control steps. The mechanical coupling between adapter and piston inherently establishes the correct position, making the system self-servicing during cartridge changes.
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 efficient switching between different drug cartridges, reducing the time required for injections and minimizing battery consumption by eliminating the need for frequent piston repositioning, thus enhancing operational convenience and device portability.
Implementation Method 1
a piston driving mechanism that drives the piston in the longitudinal direction
Data Source
AI summary
A drug injection system includes a cartridge adapter and a drug injection device. The cartridge adapter includes: a main body case; an attachment portion provided on the main body case used for attachment to the drug injection device; an accommodating portion that accommodates therein a drug cartridge; a piston; a piston gear that allows the piston to slide therethrough; a stopper that stops movement of the piston gear; and a release lever that releases a locked state of the piston gear. The drug injection device includes: a casing that accommodates therein a portion of the cartridge adapter; an engagement portion that engages with the cartridge adapter; a drive gear to which the piston gear of the cartridge adapter is connected; a motor connected to the drive gear; and a release bar that drives the release lever of the cartridge adapter.