Syringe Closure Locking Element Dynamics
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Solution Overview
Problem
Existing syringe closures require high pressing forces to secure the cap on the syringe, which can lead to breakage of the glass syringe and material fatigue, resulting in an insecure hold.
Innovation Solution
A syringe closure with a locking device featuring at least one locking element that initially assumes a release position, allowing easy placement with low forces, and then engages with a recess on the syringe extension to achieve a secure form fit in a second functional position, ensuring a strong hold without material overstretching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the syringe cap is designed to expand when placed on the extension to achieve a secure hold, then the holding force is improved, but the syringe (glass) may breakage and the cap material may exhibit fatigue
Solution Approach 1:
The locking element is designed to transition from a first functional position (release position) to a second functional position (locking position) after the syringe cap is placed on the extension. This dynamic transformation allows the cap to initially be placed with low force, then automatically lock into position, achieving secure holding without excessive expansion force that would cause breakage or material fatigue
Solution Approach 2:
The locking element is pre-configured in a release position that allows easy placement of the syringe cap on the extension. After placement, the locking element automatically transforms to engage with the recess, creating the secure hold. This preliminary configuration eliminates the need for high pressing forces during the initial placement phase
2Strength
If high pressing forces are used to secure the syringe cap on the extension, then the holding force is improved, but the syringe may break and the cap material may fatigue
Solution Approach 1:
The locking mechanism transforms from a low-force placement state to a high-force locking state automatically after the cap is placed on the extension. The locking element engages with the recess to create the strong holding force, eliminating the need for continuously high pressing forces that would risk breakage
Solution Approach 2:
The attachment process is segmented into two distinct phases: a low-force placement phase where the cap is initially positioned on the extension, and a high-force locking phase where the locking element engages with the recess. This segmentation allows each phase to use only the force necessary for that specific operation
3Strength
If the syringe cap material is overstretched during attachment to achieve secure hold, then the holding force is improved, but the material exhibits fatigue that prevents secure hold
Solution Approach 1:
The locking element dynamically transforms from a release position to a locking position after placement, engaging with the recess to create holding force without requiring continuous overstretching of the cap material. This eliminates the cyclic stress that would cause material fatigue
Solution Approach 2:
The locking element is pre-configured to engage with the recess automatically after placement, creating the secure hold without requiring the cap material to be overstretched. This preliminary locking action prevents the material fatigue that would result from repeated overstretching
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 syringe closure can be securely attached to the syringe with minimal force, reducing the risk of breakage and material fatigue, maintaining a secure fit even under varying conditions such as storage and sterilization processes.
Implementation Method 1
the at least one locking element, in a second functional position, ensures a positive fit with the at least one recess on the extension, so that the syringe closure is securely held on the syringe in this second functional position, the locking position
Data Source
Figure 1~5
AI summary
The invention relates to a syringe closure (1) for a syringe (5) having a main body (7), a projection (9) located at the end thereof, which proceeds from the main body (7) and has a free end (11) and a base (15) arranged on the main body (7), wherein at least one depression (13) is provided on the projection (9) at a distance from the free end (11) thereof, wherein, in order to close the syringe (5), the syringe closure (1) can be placed over the free end (11) of the projection (9) in such a manner that the syringe closure (1) engages over the at least one depression (13) in the projection (9). The syringe closure (1) is characterised by a locking means (25) having at least one locking element (27), which assumes a release position when in a first functional position after the syringe closure (1) has been placed onto the projection (9), and which ensures a form fit with the at least one depression (13) on the projection (9) when in a second functional position, the locking position, and thus holds the syringe closure (1) in a locking manner on the projection (9).