Syringe Connection Module With Receiving Sleeve for Safe Cannula Release
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Solution Overview
Problem
Existing connection modules for syringes, particularly those with a Luer lock design, often pose difficulties in safely releasing the connection, risking injury and contamination, especially when the first connection part is a cannula.
Innovation Solution
A connection module design that allows for easy release by loosening a screw connection using a receiving sleeve, eliminating the need to handle the cannula, featuring radial projections and conical surfaces for secure engagement, and a syringe with adjustable piston rod stroke for precise fluid administration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the connection module uses a Luer lock design with a cannula, then the connection is secure and reliable, but it becomes difficult to release and poses injury and contamination risks
Solution Approach 1:
The connection module is divided into distinct functional components: a receiving sleeve for manipulation, a cannula for fluid delivery, and a syringe interface. This segmentation allows the receiving sleeve to be operated independently to release the connection without requiring direct handling of the cannula, thus maintaining connection reliability while improving ease of release.
Solution Approach 2:
The receiving sleeve acts as an intermediary tool that mediates the release operation. By using the receiving sleeve to engage with the cannula's external threading, the operator can loosen and release the connection without directly touching the cannula tip, eliminating the need for manual handling while maintaining secure connection during use.
2Stability of the object's composition
If the cannula is held securely in the connection module, then the connection is stable, but manual handling of the cannula is required for release which risks contamination and injury
Solution Approach 1:
The harmful aspect of direct cannula handling is extracted by introducing a separate receiving sleeve component. The receiving sleeve is designed to interface with the cannula's external threading, allowing the operator to manipulate and release the connection without the cannula ever being directly handled, thus eliminating contamination and injury risks while maintaining connection stability.
Solution Approach 2:
The receiving sleeve serves as a protective intermediary between the operator's hand and the cannula. It provides a safe interface for manipulation, allowing secure engagement and release operations to be performed without the operator contacting the potentially contaminated cannula tip, thereby preventing both contamination and injury.
3Ease of operation
If the connection module allows easy release, then the ease of operation is improved, but the connection reliability may be compromised
Solution Approach 1:
The connection module employs dynamic characteristics through its threaded engagement mechanism. The cannula's external threading engages with the receiving sleeve's internal threading, creating a mechanically advantageous connection that is both secure during use and easily released by simple rotational movement of the receiving sleeve, thus achieving both ease of operation and connection reliability.
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 safe and repeatable release of the connection without manual handling of the cannula, ensuring contamination prevention and allowing for adjustable spray quantity through the syringe's adjustable piston rod mechanism.
Implementation Method 1
One of the two contact surfaces can be designed as an inner conical surface and the other of the two contact surfaces can be designed as an outer conical surface
Implementation Method 2
The receiving sleeve can be designed as a receiving nut, in which the first threaded section is an internally threaded section
Data Source
Figure 1~3
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Figure 6~10
AI summary
A connection module is provided comprising a first connection part (13) having a first fluid channel and a first contact surface (51), a second connection part (12) having a second fluid channel (11) and a second contact surface (50), wherein one of the two contact surfaces (51) is designed as an inner surface and the other of the two contact surfaces as an outer surface (50) that is complementary to the inner surface (51), wherein the connection module further comprises a receiving sleeve (54) with a first threaded section (55) and a first connecting element (53) for the first connection part (13), the first connection part (13) having a second connecting element (57, 58) which interacts with the first connecting element (53) such that the first connection part (13) is detachably connected to the receiving sleeve (54),wherein the second connecting part (12) has a second threaded section (56) complementary to the first threaded section (55), and the two fluid channels (11) are connected to each other by screwing the two threaded sections (55, 56) together, and the first contact surface (51) of the first connecting part (13) is brought into sealing contact with the second contact surface (50) of the second connecting part (12), and wherein when the screw connection of the two threaded sections (55, 56) is loosened, the receiving sleeve (54) exerts a force on the first connecting part (13) via the two connecting means (53, 57, 58), which moves the first contact surface (51) away from the second contact surface (50).