Syringe Latch System for Reliable Injector Engagement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The engagement reliability of syringe/injector interfaces in medical injectors is insufficient, leading to a need for a more reliable mechanism to securely mount and remove syringes from the injector system.
Innovation Solution
A syringe latch system with a plurality of latch members that move from a closed to open position under axial motion and back to closed position when force is applied, ensuring secure engagement and easy disengagement of the syringe, utilizing a syringe engagement flange and syringe release gear for reliable seating and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional syringe mounting assembly with tabs and annular surface is used, then the syringe can be inserted and secured to the injector, but the engagement reliability is insufficient
Solution Approach 1:
The syringe mounting interface is segmented into multiple independent latch members (at least two) that can engage or disengage independently. Each latch member includes a latch arm with a latch surface that interfaces with the syringe rearward end, providing distributed engagement points that improve reliability while maintaining manageable complexity through modular design
Solution Approach 2:
The latch members are designed to be movable between engaged and disengaged states. The latch arms can pivot or translate to accommodate syringe insertion and secure engagement, then move to a locked position. This dynamic capability allows the system to adapt during the mounting process while achieving reliable engagement
2Reliability
If the syringe latch uses multiple movable latch members, then secure engagement is achieved, but the mechanism complexity increases
Solution Approach 1:
Multiple latch members are merged into a single integrated syringe latch assembly that is mounted to the injector housing. The latch members share common mounting structures and actuation mechanisms, allowing them to function together as a unified system rather than separate components, thereby improving reliability without proportionally increasing overall complexity
Solution Approach 2:
The latch members serve multiple functions: they guide the syringe during insertion, secure the syringe in the engaged position through latch surfaces, and can be actuated together for simultaneous release. This multi-functionality reduces the need for separate mechanisms for each function, managing complexity while achieving reliable engagement
3Ease of operation
If the latch members are designed to move from closed to open position under axial motion, then easy disengagement is enabled, but the mechanism complexity increases
Solution Approach 1:
The latch members are designed to automatically move from the engaged to disengaged state in response to axial motion of the syringe. The mechanical geometry of the latch arms and their mounting allows them to self-actuate during syringe insertion or removal without requiring external actuation mechanisms, thereby improving ease of operation while minimizing added complexity
Data Source
AI summary
An injector system for injecting fluid includes a syringe and an injector. The syringe includes a body and a plunger movably disposed within the body. The plunger has at least one flexible leg extending toward the rearward end of the body. The injector has a housing with a front plate, a drive member at least partially disposed within the housing and operable to engage the plunger, and a syringe release assembly operable to release the syringe. The syringe assembly includes a syringe release gear that forms an enclosure for receiving the syringe when the syringe is fully seated within the housing and a plunger release tube surrounding at least a portion of the drive member. The plunger release tube has a first end rotationally engaged with the syringe release gear. Rotation of the syringe release assembly releases the at least one flexible leg from the drive member.