Tabless Syringe Tip Cylindrical Fit Prevents Leakage
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Solution Overview
Problem
The existing syringe tip design obstructs the surgical field and hinders operability due to a large tab that makes it difficult to see the cavity being filled with viscous material and increases the risk of the tip falling off or leaking during use.
Innovation Solution
A syringe tip with a cylindrical portion and nozzle design that securely attaches to the syringe, featuring specific length and diameter ratios to prevent unintentional detachment and leakage, while minimizing obstruction of the surgical field, allowing for improved operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tab (blade) is added to the syringe tip to prevent detachment, then the attachment reliability is improved, but the tab obstructs the surgical field and reduces operability
Solution Approach 1:
The patent removes the traditional tab structure from the syringe tip design. Instead of adding a protruding tab for attachment, the invention uses a tabless cylindrical portion that fits into the syringe, eliminating the obstructive element while maintaining secure attachment through the engagement between the cylindrical portion and syringe interior
Solution Approach 2:
The patent transitions from a tab-based attachment mechanism (protruding in one dimension) to a cylindrical fit-based mechanism (utilizing radial and axial dimensions). The cylindrical portion with specific diameter ratios creates secure attachment through dimensional compatibility with the syringe interior rather than through a protruding tab
2Strength
If a tab is used to secure the syringe tip, then the attachment strength is improved, but the tab creates gaps that allow viscous material to leak
Solution Approach 1:
The patent eliminates the tab structure that created gaps and leakage pathways. The tabless design with a smooth cylindrical portion fits seamlessly into the syringe, removing the source of gaps that would allow viscous material to escape while maintaining attachment strength through the engagement geometry
Solution Approach 2:
The cylindrical portion acts as a seamless interface between the syringe tip and syringe body, creating a continuous surface without gaps. The engagement between the cylindrical portion and syringe interior forms a tight seal that prevents viscous material from leaking through gaps
3Ease of operation
If the cylindrical portion dimensions are reduced to minimize obstruction, then the operability is improved, but the attachment security may be compromised
Solution Approach 1:
The patent establishes specific parameter ranges for the cylindrical portion dimensions, including diameter ratios and length constraints. These parameter specifications ensure that the cylindrical portion is small enough to minimize obstruction and improve operability while maintaining sufficient attachment security through optimized dimensional proportions
Data Source
AI summary
To provide a syringe tip that can prevent the syringe tip from unintentionally falling-off during filling and prevent viscous material from leaking out from gaps by securely attaching the syringe tip to a syringe and can provide excellent operability without obstructing a surgical field.To provide syringe tip to be attached to a tip of a syringe containing viscous material to discharge the viscous material, comprisinga syringe engaging portion that engages with the syringe,a cylindrical portion having a hollow portion with a virtual center line at its center and held by a user in the case of engaging the syringe tip with the syringe, anda nozzle portion discharging the viscous material contained in the syringe,wherein in the case that the maximum length (mm) between both end portions of the cylindrical portion on a virtual straight line orthogonal to the virtual central line is defined as first length A, the virtual straight line orthogonal to the virtual central line and including both end portions of the cylindrical portion constituting the first length A is defined as first virtual straight line, and the length (mm) between both end portions of the cylindrical portion on a second virtual straight line orthogonal to the virtual central line and orthogonal to the first virtual straight line is defined as second length B,the first length A and the second length B satisfy the following relational expressions (1) to (3).First length A/Second length B≥1.5 Relational expression (1):13≥(First length A+Second length B)≥5 Relational expression (2):5≥Second length B Relational expression (3):