Syringe Protective Sheath Flat Wall Segmentation
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Solution Overview
Problem
Existing protective assemblies for dental syringes are impractical due to difficulties in storage and installation, as rolled-up sheaths tend to cling together and are hard to unroll with one hand, making them unsatisfactory for practitioners.
Innovation Solution
A protective assembly featuring a cannula made of elastically rigid material with a base for syringe fixation and a flexible sheath with irreversible attachment, formed of two flat parallel walls, and channels for fluid spraying, along with a reference mark for orientation, and a pre-cut line with an orifice for easy handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the sheath is rolled up for storage, then storage space is reduced, but the sheaths tend to cling to each other and are difficult to unroll with one hand
Solution Approach 1:
The sheath is divided into two flat parallel walls instead of being a rolled-up cylindrical structure. This segmentation allows the sheath to be stored flat with minimal volume while eliminating the clinging problem associated with rolled-up structures, and enables easy separation and unrolling with one hand.
Solution Approach 2:
The sheath transitions from a three-dimensional rolled-up cylindrical form to a two-dimensional flat structure. This dimensional change reduces storage volume significantly while eliminating the interlocking and clinging issues that occur with rolled-up sheaths, and facilitates easy handling and unrolling.
2Ease of operation
If the sheath is made loosely fitting for easy installation, then ease of operation is improved, but protection effectiveness may be reduced
Solution Approach 1:
The sheath is constructed as a flexible thin-walled structure with two parallel walls that can easily accommodate the syringe body during installation. The flexibility ensures easy sliding on and off, while the complete coverage from base to tip maintains protection effectiveness despite the loose fit.
Solution Approach 2:
The protective function is extracted from requiring a tight fit and is instead achieved through complete surface coverage of the syringe body. The sheath protects by forming a barrier over the entire exposed surface area, not by conforming tightly to the syringe contours.
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 solution enables efficient storage and easy installation and removal of the protective assembly, preventing contamination and improving usability for practitioners.
Implementation Method 1
The cannula is made of an elastically deformable material, so that the practitioner can bend it to orient it according to his needs
Implementation Method 2
said fixing being irreversible
Data Source
Figure 1~2
Figure 3
AI summary
Protection assembly for a syringe, notably a dental syringe, including a syringe body, said protection assembly being disposable and including a cannula (10) made of an elastically rigid material comprising a base (16) to be fixed on the syringe body, and a sheath (12) made of a flexible material formed by two flat parallel walls (18a, 18b) which loosely covers said syringe body, said sheath being fixed to said cannula adjacent to said base, wherein fixing cannot be reversed.