Pen-Like Syringe Venting for Precise Pneumatic Injection Control
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Solution Overview
Problem
Existing syringe devices for medical applications, particularly in ophthalmology, face challenges in ensuring user-friendliness, safety, and reliability, especially in handling and actuation, with a risk of contamination and uncontrolled substance injection or removal.
Innovation Solution
A pen-like syringe device with an external power supply unit and electrical delivery unit, allowing for ergonomic handling, safe injection or removal, and precise metering without an integrated power source, using a drive housing, syringe receptacle, and a manually operable push button for activating an electrical delivery unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If an integrated power supply unit is included in the syringe device, then the electrical delivery unit can be powered, but the weight and size of the device increase, making it less ergonomic
Solution Approach 1:
The syringe device is divided into two separate components: a lightweight syringe device and a separate external supply unit containing the power supply unit. This segmentation allows the syringe device to remain lightweight and ergonomic while the power supply capabilities are provided externally through a coupling connection.
Solution Approach 2:
The power supply unit is extracted from the syringe device and placed in a separate external supply unit. This extraction eliminates the weight and size penalties of an integrated power supply while maintaining the electrical delivery capability through the coupling connection between the two units.
2Ease of operation
If a manually operable push button is used to activate the electrical delivery unit, then ease of operation is improved, but the risk of unintentional activation increases
Solution Approach 1:
The system incorporates a feedback mechanism where the push button must be deliberately actuated to activate the electrical delivery unit. The design includes a vent channel that is closed by the push button, providing immediate feedback to the user that activation has occurred, and preventing unintentional activation through the mechanical interlock of the push button with the vent channel closure.
3Measurement precision
If the syringe device is designed for precise metering and controlled injection, then injection accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical metering mechanisms with an electrical delivery system controlled by a push button. The electrical delivery unit, activated by the push button, provides precise control over substance delivery without requiring complex mechanical metering components, thereby reducing overall device complexity while maintaining injection precision.
4Weight of moving object
If the syringe device is made lightweight by removing the integrated power supply, then ergonomics are improved, but the device requires external connection infrastructure
Solution Approach 1:
The external supply unit is designed as a universal, multi-functional unit that can be connected to different syringe devices through the coupling connection. This universal design allows the same external supply unit to serve multiple syringe devices, reducing the overall system complexity despite the addition of external connection infrastructure.
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 design provides a lightweight, ergonomic, and safe syringe device that ensures easy handling, targeted injection or removal, prevents contamination, and allows precise dosing, with immediate termination of injection or removal upon actuation termination, reducing strain and operational complexity.
Implementation Method 1
an electrical delivery unit (27), in particular a diaphragm pump, for applying pressure or negative pressure to the plunger (19)
Implementation Method 2
a drive channel (10) for applying pressure or negative pressure to the plunger (19) of a syringe (17) inserted into the syringe receptacle (4)
Data Source
AI summary
A syringe device and a syringe system with a syringe device provides an ergonomic syringe device which enables safe operation and safe injection by using a pen-like syringe device having a drive housing, a syringe receptacle for receiving a syringe having a syringe body and a plunger guided therein, and a manually operable push button for activating an electrical delivery unit. The drive housing has a pressure supply unit for pneumatically actuating the plunger and a coupling connection for connection to an external supply unit. The pressure supply unit includes a drive channel which can be connected to the plunger of an inserted syringe. The syringe device has a vent channel connected to the drive channel and via an opening to the environment, the opening being closable by a finger when the push button is actuated.