Stopper With Radially Expandable Peripheral Wall For Sealing Member
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Solution Overview
Problem
Conventional stoppers face issues where the sealing member can easily come off during fluid discharge, compromising product quality, or become difficult to insert, affecting manufacturing efficiency.
Innovation Solution
The stopper design incorporates first peripheral wall sections fixed in the axial direction and second peripheral wall sections that open radially outward, allowing easy insertion and locking of the sealing member, which then gets further secured by being bent inwardly by the guiding path, preventing removal and ensuring multiple uses with a discharge needle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing member outer diameter is increased to prevent it from coming off, then reliability improves, but ease of operation deteriorates as it becomes difficult to insert
Solution Approach 1:
The peripheral wall section is divided into multiple segments that can move independently. The first peripheral wall section remains fixed while the second peripheral wall section can radially expand to locked positions, allowing the sealing member to be inserted easily through the expanded state and then retained when the section locks
Solution Approach 2:
The peripheral wall section transitions from a static structure to a dynamic one where the second peripheral wall section can radially expand and contract. This dynamic behavior allows the structure to adapt between two states: an inserted state with expanded peripheral walls for easy insertion, and a locked state with contracted peripheral walls for reliable retention
2Ease of operation
If peripheral wall sections are completely divided to allow easy insertion, then ease of operation improves, but reliability deteriorates as the sealing member may come off during discharge
Solution Approach 1:
The peripheral wall section is segmented into first and second peripheral wall sections with different functions. The first section provides structural support and fixed positioning, while the second section provides expandable locking capability, achieving both easy insertion and reliable retention
Solution Approach 2:
The second peripheral wall section is designed to be radially movable rather than completely divided. This dynamic structure allows it to expand outward during insertion to facilitate sealing member entry, then contract and lock to prevent the sealing member from coming off during discharge operations
3Ease of operation
If excessive force is applied to insert the sealing member into completely divided peripheral wall sections, then ease of operation improves, but device complexity increases due to potential deformation and malfunction
Solution Approach 1:
By dividing the peripheral wall into fixed and movable sections, the structure distributes the insertion forces appropriately. The fixed first section maintains structural integrity while the movable second section accommodates insertion movements, preventing deformation and malfunction
Solution Approach 2:
The dynamic design of the second peripheral wall section allows it to flexibly respond to insertion forces by radially expanding, rather than requiring excessive force that could cause deformation. This controlled movement protects the overall structural integrity of the stopper member
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3(a)~3(b)
AI summary
The purpose of the present invention is to provide a stopper capable of easily inserting a sealing member 3 into a stopper member 2 and also capable of preventing the sealing member 3 from coming out of the stopper member 2. The stopper is equipped with a stopper main body 1 having a guiding path 10 extending in an axial direction, a stopper member 2 having a flow path extending in the axial direction and inserted in the guiding path 10 of the stopper main body 1, and a sealing member 3 inserted into the flow path 20 of the stopper member 2 in such a manner as to block the flow path 20. The stopper member 2 is equipped with, at a position where the sealing member 3 is inserted, a first peripheral wall section 27 fixed in a manner as to extend in the axial direction and a second peripheral wall section 27 divided in a manner as to open radially outward along the axial direction.