Carpule Syringe Cover Locking Mechanism
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Solution Overview
Problem
Carpule syringes require manual assembly and handling of carpules and plungers, which complicates their operation and packaging, especially for industrial-scale preparation and distribution.
Innovation Solution
A carpule syringe design featuring a pivotally connected cover that allows for easy carpule insertion and retention, enabling industrial machinery-assisted assembly and allowing the plunger to be removed for packaging, with a locking mechanism to prevent accidental carpule ejection and ensure single-use functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual assembly of carpule syringes is used, then flexibility in handling is maintained, but operation complexity and time consumption increase
Solution Approach 1:
The syringe is divided into separate modules (body, plunger, carpule, cover) that can be independently manufactured and then quickly assembled. The cover acts as a separate component that snaps onto the body, allowing for rapid assembly without complex fastening mechanisms.
Solution Approach 2:
The syringe is designed as a disposable single-use device, eliminating the need for complex assembly and disassembly procedures. The entire unit can be pre-assembled during manufacturing and then discarded after use, significantly reducing assembly time and operational complexity.
2Productivity
If carpules are pre-loaded during manufacture, then distribution efficiency improves, but device complexity increases
Solution Approach 1:
The carpule is pre-loaded into the syringe body during the manufacturing process, before the product reaches the end user. This preliminary action simplifies the final product to a ready-to-use unit, improving distribution efficiency while the manufacturing complexity is handled during production rather than at the point of use.
Solution Approach 2:
The carpule and syringe body are combined into a single integrated unit during manufacturing. The cover then encapsulates both components, creating a unified disposable device that simplifies handling and distribution while maintaining manufacturing efficiency.
3Ease of manufacture
If the plunger is removed for packaging, then packaging efficiency improves, but ease of operation worsens
Solution Approach 1:
The plunger is separated from the syringe body for packaging purposes, allowing the body and carpule to be packaged independently. This segmentation improves packaging efficiency and storage space utilization while maintaining the integrity of the main syringe unit.
Solution Approach 2:
The cover serves as an intermediary component that connects the plunger to the syringe body during operation. The plunger can be packaged separately and then attached to the body through the cover mechanism, resolving the conflict between packaging efficiency and ease of use.
4Reliability
If a locking mechanism is added to prevent accidental ejection, then safety improves, but device complexity increases
Solution Approach 1:
The cover incorporates a locking mechanism that automatically engages when the cover is closed, preventing accidental ejection of the carpule. This preliminary anti-action counteracts the potential harmful effect of accidental discharge before it can occur, improving safety without requiring complex additional components.
Solution Approach 2:
The locking mechanism is integrated into the cover structure itself, combining the protective cover function with the safety locking function in a single component. This merging approach improves safety while minimizing the increase in device complexity.
Data Source
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AI summary
A syringe (1) for carpules (2) comprises a body (3) having a cavity (31) for receiving a fluid- containing carpule (2), the body (3) having a first through opening (32), facing the cavity (31) and adapted to be engaged by a needle (4), and a second through opening (33), facing the cavity (31) and configured to allow insertion of said carpule (2) into the cavity (31). The syringe (1) comprises a plunger (6) configured to evacuate the fluid from the carpule (2). The syringe comprises a cover (5), attached to the body (3) and adapted to be switched between a closed position, in which the cover (5) engages the second opening (33), and an open position, in which the second opening (33) is free, The cover (5) has a hole (51), and the plunger (6) is configured to be slidingly inserted in the hole (51), when the cover (5) is in the closed position.