Centrifugal Smearing Device Sealing Structure
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Solution Overview
Problem
Conventional centrifugal smearing devices face issues with liquid components leaking outside the sealed rotating container due to the tapered shape of the container's wall, which allows scattered liquid to seep into the seal portion, potentially causing infection risks and operational hazards.
Innovation Solution
The centrifugal smearing device incorporates a sealed rotating container with a scattering protection wall that protrudes inwardly to prevent liquid from reaching the seal portion, and a lid with a seal portion at its outer edge, ensuring that any scattered liquid is directed away from the seal area, thereby preventing leakage and maintaining containment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a tapered wall shape is used in the sealed rotating container, then the container structure is simplified and easier to manufacture, but liquid components scattered from the chamber can seep out through the tapered wall to the planar portion and potentially leak outside the container
Solution Approach 1:
The container wall is segmented into two functional portions: an upper tapered portion for structural simplicity and a lower vertical portion with a protrusion for liquid containment. This segmentation allows each portion to serve its specific function while collectively solving the leakage problem.
Solution Approach 2:
A protruding structure acts as an intermediary element between the tapered wall and the seal portion. This protrusion creates a vertical barrier that intercepts scattered liquid components before they can reach the seal portion, preventing leakage while maintaining the tapered wall design.
2Productivity
If filter paper is arranged between the opening portion and the slide glass, then floating cells are efficiently collected on the slide glass, but liquid components separate during centrifugation and scatter from the chamber
Solution Approach 1:
The scattered liquid components, which were previously a harmful factor causing potential leakage, are redirected by the protrusion to flow along the inner wall and collect in the lower portion of the chamber. This converts the harmful scattering into a beneficial collection process.
Solution Approach 2:
The protrusion serves as an intermediary structure that intercepts scattered liquid components and redirects them away from the seal portion. It creates a controlled flow path that prevents leakage while maintaining the cell collection function.
3Ease of manufacture
If the seal portion is exposed at the outer circumferential edge of the lid, then the sealing structure is simple and easy to manufacture, but scattered liquid components can reach the seal portion and potentially leak outside the container
Solution Approach 1:
The protrusion acts as an intermediary barrier between the scattered liquid components and the seal portion. It creates a physical obstruction that prevents liquid from reaching the seal area while maintaining the simplicity of the overall sealing structure.
Solution Approach 2:
The solution adds a vertical dimension to the sealing arrangement by creating a protrusion that extends upward from the chamber bottom. This vertical barrier provides an additional layer of protection against liquid leakage without complicating the horizontal sealing structure.
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
This design effectively prevents liquid components from leaking outside the container, ensuring operator safety and maintaining the integrity of the sealed environment, even under centrifugal force, by directing scattered liquid downward and outward, away from the seal area.
Implementation Method 1
When the chamber is rotated to apply a centrifugal force to the liquid sample, the liquid sample passes through this passage to move outward
Implementation Method 2
a seal portion is constituted between the main body 7 and the lid 8 to prevent liquid from leaking from an inside of the main body 7 to an outside thereof
Implementation Method 3
a centrifugal smearing device has been known for performing centrifugation on liquid collected from body fluid, blood, and urine to obtain cells
Data Source
AI summary
A centrifugal smearing device including a sealed rotating container that houses a chamber with a slide glass removably attached for holding a liquid sample to smear cells with a centrifugal force onto the slide glass, and a base housing the sealed rotating container and including rotational driving means for rotating the sealed rotating container, the sealed rotating container includes a main body capable of housing the chamber and a lid for closing an upper surface opening portion of the main body, a seal portion for sealing a space between the main body and the end face of the upper face opening portion is provided on an outer circumferential edge of the lid, and a scattering protection wall is formed at an inside of the seal portion so as to protrude downward to hide the seal portion from inside so that a liquid does not scatter onto the seal portion.