Screw-Driven Multi-Syringe Injection Device
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Solution Overview
Problem
Current devices for simultaneous injection of multiple substances from separate syringes are cumbersome and require manual refilling and precise operator control, lacking ease of syringe exchange and precise volume control.
Innovation Solution
A device with a handle, syringe barrel supporting structure, and a screw mechanism that advances the plungers of multiple syringes simultaneously, allowing for controlled and precise expulsion of substances, with easy syringe exchange and ergonomic design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual syringe operation is used, then operator control is flexible, but operator strain increases and precision decreases
Solution Approach 1:
A mechanical linkage system acts as an intermediary between the operator's manual input and the syringe plungers. The linkage translates rotational motion into precise linear displacement of multiple plungers simultaneously, ensuring synchronized injection with controlled depth and volume while reducing operator physical strain.
Solution Approach 2:
The patent replaces direct manual plunger manipulation with a mechanical transmission system. The system uses a common drive mechanism coupled with linkages to automatically control plunger movement, substituting the imprecise and physically demanding manual operation with a mechanically controlled system that ensures precision and synchronization.
2Quantity of substance
If separate syringes are used for multiple substances, then substance separation is maintained, but device complexity increases
Solution Approach 1:
The device employs a universal mounting structure and common drive mechanism that can accommodate multiple syringes of different types and sizes. The standardized interface and linkage system allow the same mechanical structure to control multiple syringes simultaneously, reducing overall device complexity while maintaining substance separation through individual syringe barrels.
Solution Approach 2:
The patent merges the control mechanisms for multiple syringes into a single integrated system. A common drive shaft with linked plungers combines what would otherwise be separate control systems, reducing device complexity while maintaining the ability to independently control each syringe's injection parameters through the linkage geometry.
3Reliability
If deep injection is performed, then treatment effectiveness improves, but needle deflection increases
Solution Approach 1:
The device performs preliminary depth control through the mechanical linkage system before injection begins. The linkage is designed with specific geometric relationships that pre-determine the plunger displacement and injection depth, ensuring that the needle reaches the target depth without excessive deflection by controlling the injection rate and profile in advance.
Solution Approach 2:
The mechanical linkage system provides dynamic control of plunger movement during injection. By adjusting the linkage geometry and drive speed, the system can modulate the injection rate to compensate for needle deflection forces, maintaining treatment effectiveness while minimizing needle bending through controlled, gradual pressure application.
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 controlled simultaneous injection of multiple substances, reducing operator strain and improving efficiency by eliminating the need for manual refilling and precise plunger control, while allowing for easy syringe replacement.
Implementation Method 1
a screw mechanism, including a rotatable shaft, useable to advance the syringe plunger driving assembly in a distal direction, thereby causing the syringe plungers to expel substances from the syringes
Data Source
Figure 1
Figure 2A~2C
Figure 3~4A
AI summary
Devices and methods for simultaneous injection or delivery of two or more substances from separate syringes. The syringes are loaded into a device that has a handle and a screw driven mechanism for simultaneously depressing the plungers of the syringes. The user grasps the handle and positions the device. Thereafter, the screw mechanism is used to simultaneously advance the plungers of the syringes thereby simultaneously expelling the substances from the syringes.