Syringe Cap With Removable Indicator And Twist Brake
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing syringe caps lack effective detectability of first use and often require complex handling procedures, with parts remaining on the syringe after initial use.
Innovation Solution
A syringe cap design featuring a removable indicator element integrated with the cap parts, incorporating a twist coupling mechanism and brake formations to ensure straightforward detection of first use and secure attachment, with the indicator element visible on the distal side and the inner cap comprising a sealing and screw part for enhanced usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the indicator element is integrated with the cap parts and removed together, then the detectability of first use is improved, but the device complexity increases
Solution Approach 1:
The syringe cap is divided into two separable cap parts connected by a breaking web. The indicator element is integrated with the removable cap part, allowing the entire assembly (cap part with indicator) to be removed together as one unit. This segmentation enables clear detection of first use while maintaining manageable structural complexity through modular design.
Solution Approach 2:
The indicator element is merged with the removable cap part as an integrated component rather than a separate element. This combination ensures that the indicator is always present with the cap part during use and is removed together with it, providing reliable detectability without adding separate complex mechanisms for indicator attachment and detachment.
2Reliability
If brake formations are added to prevent unintentional unscrewing, then the reliability is improved, but the ease of operation deteriorates
Solution Approach 1:
The brake formation is designed to provide dynamic resistance during the unscrewing process. It creates friction that opposes unintended loosening but can be overcome by deliberate twisting motion. The brake formation engages automatically during normal use to prevent accidental unscrewing, while allowing intentional removal when sufficient force is applied.
Solution Approach 2:
The brake formation acts as an intermediary element between the cap part and the syringe body. It introduces frictional resistance that mediates the interaction during unscrewing, preventing unintentional separation while allowing controlled removal when the user deliberately applies the necessary force to overcome the brake.
3Ease of operation
If the indicator element is located on the distal side for visibility, then the ease of operation is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The indicator element is pre-positioned on the distal side of the cap part during manufacturing, ensuring it is already in the optimal location for visibility before the syringe cap is assembled and used. This preliminary positioning eliminates the need for complex post-assembly adjustments and ensures consistent, reliable visibility of the indicator during first use detection.
Data Source
AI summary
The invention relates to a syringe cap (1) for a medical syringe (28), having two cap parts (2, 3) displaceable toward each other, wherein a motion of the cap parts (2, 3) toward each other takes place when the syringe cap (1) is first removed from the syringe (28). In order to disclose a syringe cap for a medical syringe, wherein a first use can be advantageously determined and handling is simple, according to the invention an indicator element is displaced into a display setting and the display element (6) can be removed from the syringe (28) together with the cap parts (2, 3) of the syringe cap (1).