Conformable Syringe Handle for Compact Sealing and Reuse
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Solution Overview
Problem
Conventional syringes for non-medical applications, such as dispensing foodstuffs, face issues with plunger extension, lack of suitable caps, and inconvenience in cleaning, making them unsuitable for reuse.
Innovation Solution
A syringe design featuring a resilient, arcuate plunger handle that conforms to the barrel, a hinged attachment, and a rotatable cap to seal the dispensing end, along with a detachable plunger for easy cleaning and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the plunger extends fully from the syringe barrel when full, then the syringe can dispense all contents, but the plunger may be inadvertently pushed and dispense contents unintentionally
Solution Approach 1:
The plunger handle is designed to fold back against the barrel, changing its spatial configuration from an extended linear position to a retracted folded position. This dimensional change allows the handle to move from a position where it could be accidentally pushed to a position where it is protected against unintended activation.
Solution Approach 2:
The plunger handle transitions from a static extended position to a dynamic folded position that can adapt to different states (full vs. empty syringe). This dynamic reconfiguration allows the handle to conform to the barrel when full, preventing accidental discharge, while still allowing full extension when needed for dispensing.
2Object-affected harmful factors
If separate caps are used to cover the dispensing tip, then the tip can be protected, but the caps are easily lost and do not cover the entire dispensing end
Solution Approach 1:
The cap is merged with the plunger handle, forming an integrated assembly where the cap is positioned at the end of the handle. This combination ensures the cap cannot be lost separately and provides coordinated protection for both the dispensing tip and the entire dispensing end when the handle is folded back.
Solution Approach 2:
The plunger handle assembly serves multiple functions: it acts as the pushing mechanism for dispensing, provides structural support, and incorporates the cap for protection. This multi-functionality eliminates the need for separate cap components and ensures comprehensive coverage of the dispensing end.
3Duration of action of stationary object
If the plunger is permanently attached to the barrel, then the syringe can be reused, but cleaning becomes difficult as the plunger cannot be removed
Solution Approach 1:
The plunger is segmented into two separable parts: the head that remains in the barrel and the handle that can be detached. This segmentation allows the handle to be removed for cleaning while the head stays in place, maintaining reusability while improving cleaning accessibility.
Solution Approach 2:
The connection between the plunger head and handle transitions from a permanent fixed attachment to a dynamic detachable connection. This allows the assembly to be configured as attached during use (for reusability) and separated during cleaning (for accessibility), adapting to different operational needs.
4Device complexity
If the plunger handle is rigid and does not conform to the barrel, then the structure is simple, but the plunger cannot be compacted for storage or to prevent accidental discharge
Solution Approach 1:
The plunger handle transitions from a rigid fixed structure to a dynamic flexible structure that can change its configuration. It can extend to a straight position for dispensing and fold back to conform to the barrel for compact storage and accidental discharge prevention, adapting to different operational states.
Solution Approach 2:
The handle's physical parameters (shape, position, orientation) change based on operational needs. It can be in an extended state for dispensing or a folded conformed state for storage and safety, with the resilient material enabling these parameter changes while maintaining structural integrity.
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 reusability, prevents unintentional discharge, maintains cleanliness, and facilitates easy cleaning and storage, addressing the limitations of conventional syringes.
Implementation Method 1
the handle is in the form of an arc and is made of a resilient material such that the plunger can expand or contract to conform to the shape of the barrel
Data Source
AI summary
A syringe with an arcuate plunger handle that can conform to either the inside or the outside of the barrel. This ensures that the plunger pushes straight, and in conjunction with the plunger head being hinged allows the handle to be folded onto the outside of the barrel to minimise volume. A rotatable cap attached to the handle covers the dispensing end of the syringe and seals the tip.