Filter Container Sealing and Release With a Separate Fixing Tool
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Solution Overview
Problem
Existing filter devices require strong force to detach the filter container, risking contamination and reducing analysis accuracy due to friction with rubber plugs or O-rings, while maintaining airtightness.
Innovation Solution
A filter device with a funnel, filter container, elastic body, and filter fixing tool that separates the airtightness establishment from the fixing point, allowing easy detachment with minimal force using a filter fixing tool that presses the filter container against the elastic body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter container is fixed using friction with rubber plugs or O-rings to maintain airtightness, then the airtightness is maintained, but strong force is required to detach the filter container, risking contamination and reducing analysis accuracy
Solution Approach 1:
The patent divides the fixing mechanism into two separate functional parts: an airtightness establishment part (using a seal member that contacts the filter container) and a fixing part (using a clamping mechanism). This segmentation allows the airtightness to be maintained through the seal member while the filter container can be easily detached by releasing the clamping force, without requiring strong pulling force against friction from rubber plugs or O-rings.
2Measurement precision
If a small diameter filter is used to improve concentration rate and detection sensitivity, then the concentration rate improves, but it becomes difficult to manually handle and attach/detach the filter container
Solution Approach 1:
The patent introduces a filter fixing tool as an intermediary device between the operator and the small-diameter filter container. This tool includes a clamping mechanism that can easily grasp and secure the small filter container, making manual handling, attachment, and detachment operations simple and convenient despite the small size of the filter container.
3Device complexity
If the same part of the filter container is used for both fixing and airtightness establishment, then the structure is simplified, but the filter container cannot be easily removed without strong force
Solution Approach 1:
The patent explicitly segments the fixing function and airtightness establishment function into different parts of the filter container. The airtightness is established by a seal member contacting one surface of the filter container, while the fixing is performed by a clamping mechanism acting on another part. This segmentation enables easy removal by releasing the clamp without needing to overcome friction from the seal member.
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 easy attachment and detachment of the filter container while maintaining airtightness, reducing contamination risk and improving analysis accuracy.
Implementation Method 1
an elastic body that has a through-hole serving as a flow path for the sample that has passed through the filter, an inlet periphery of the through-hole being in contact with the filter container
Implementation Method 2
a filter fixing tool that abuts on the filter container to support the filter container and that presses the filter container against the elastic body
Implementation Method 3
a cylindrical filter container having an inlet, to which a tip portion which includes the outlet of the funnel is coupled, and an outlet, and having, between the inlet and the outlet, a filter that collects an object contained in the sample
Data Source
AI summary
The filter device includes: a funnel having an inlet through which the liquid sample is introduced and an outlet having an opening area smaller than an opening area of the inlet; a filter container to which a tip portion which includes the outlet of the funnel is inserted and a filter that collects an object contained in the liquid sample; a rubber plug having a through-hole serving as a flow path for the liquid sample that has passed through the filter; and a filter fixing tool that abuts on the filter container to support the filter container and that presses the filter container against the rubber plug.