Cosmetic Wiper Retention via Interposed Protrusions
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Solution Overview
Problem
Existing liquid cosmetic material application containers face issues with the detachment of sealing wipers made from soft materials, such as synthetic rubber, when a force is applied in the axial direction, leading to potential wiper misalignment and detachment from the tank.
Innovation Solution
The application container design incorporates a cylindrical filling unit with a soft material-made wiper featuring first and second protruding portions that are interposed between wall portions and the filling unit's end, preventing axial force application and ensuring the wiper remains aligned and securely fixed, thereby preventing detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a soft material-made wiper is used to seal the tank opening, then the sealing function is improved, but the wiper may be detached when axial force is applied
Solution Approach 1:
The wiper is divided into multiple functional portions: a sealing portion for sealing the tank opening, a first protruding portion extending radially outward for positioning, and a second protruding portion extending axially for preventing detachment. This segmentation allows each portion to perform its specific function independently, resolving the contradiction between maintaining sealing reliability and preventing wiper detachment under axial force.
Solution Approach 2:
The first protruding portion acts as an intermediary element that is interposed between the tank opening end and the cover wall portion. This intermediary structure transfers and distributes axial forces, preventing them from directly acting on the sealing portion, thereby maintaining both sealing function and wiper position stability.
2Force
If the wiper is biased against the tank by a compression coil spring, then the sealing contact force is improved, but the wiper may deform and fall into the tank under axial force
Solution Approach 1:
The second protruding portion is designed to protrude axially beyond the cover wall portion, creating a preliminary mechanical barrier that prevents the wiper from being pushed into the tank under axial force. This preliminary anti-action counteracts the deforming effect of the compression coil spring and external axial forces, ensuring the wiper remains in its positioned state while maintaining sealing contact force.
3Adaptability or versatility
If the wiper is made of soft material like synthetic rubber, then the sealing adaptability is improved, but the wiper may be detached when force is applied in axial direction
Solution Approach 1:
The wiper employs a composite structure combining soft sealing material (synthetic rubber) with rigid protruding portions (resin or metal). The soft material portion provides sealing adaptability to the tank opening, while the rigid protruding portions provide axial force resistance and prevent detachment. This composite approach resolves the contradiction between sealing adaptability and axial strength.
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 configuration effectively prevents the wiper from being detached, maintaining its position and ensuring reliable sealing and functionality of the application container.
Implementation Method 1
the flange portion is biased against the tank side by a compression coil spring
Implementation Method 2
when a force acting in an axial direction is applied to the wiper, the wiper is deformed
Data Source
AI summary
An application container includes a cylindrical filling unit and a cover. The cover has a female screw formed at one end of the cover in the axial direction. The application container includes a main body that has an application tool that is configured to be inserted into the filling unit, and a male screw that is configured to be screwed into the female screw. Additionally, the application container includes a soft material wiper that is fixed to the opening of the filling unit. The wiper has a first protruding portion which protrudes outward from the opening in a radial direction of the filling unit to contact an inner surface of the cover. The first protruding portion is interposed in the axial direction between a wall portion disposed on the inner surface of the cover and the end of the filling unit which includes the opening.