Cosmetic Applicator Sealing Bead for Leak-Proof Packaging
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Solution Overview
Problem
Existing cosmetic product packaging devices for powder forms are cumbersome to use, prone to leakage due to manufacturing tolerance issues, and result in product residue on the user's fingers.
Innovation Solution
A packaging device with a container, an applicator rod, and a wiper element that uses a sealing bead for a leaktight connection, allowing the applicator to snap onto the container with a wide tolerance range, ensuring reliable sealing and easy use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the applicator is attached to the container by snap action with close manufacturing tolerances, then the sealing reliability is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The patent changes the sealing mechanism from relying on precise positional parameters (snap-fit tolerance) to relying on a dedicated sealing bead structure that provides a larger, more tolerant sealing surface area. The sealing bead on the applicator rod contacts the wiper element over a broader zone, allowing wider manufacturing tolerances while maintaining leaktight sealing.
2Loss of substance
If the rod bears against the wiper element in a leaktight manner with precise positioning, then the loss of substance is reduced, but the device complexity increases
Solution Approach 1:
The patent segments the sealing function from the positioning function. The applicator rod includes a dedicated sealing bead that specifically contacts the wiper element for sealing, while separate snap-action lugs handle the attachment and positioning. This segmentation allows each component to be optimized for its specific function with wider tolerances.
3Ease of operation
If the applicator is designed to fit inside the container with a wiper element, then the ease of operation is improved, but the object-generated harmful factors increase
Solution Approach 1:
The patent extracts the wiping function from the applicator element itself and places it on a separate wiper element fixed to the container. The wiper element contacts the applicator rod to remove excess product, preventing product residue from transferring to the user's fingers during handling, while the applicator element remains dedicated to product application.
Data Source
AI summary
A device for packaging and applying a cosmetic product includes a container for holding the product. The container can have an opening; an applicator including: a rod; an applicator element at a first end of the rod, a grasping portion connected to a second end of the rod. The applicator can be configured to be attached by snapping onto the container so as to accommodate the applicator element in the container. A wiper element can be fixed in the container in proximity to the opening. The wiper element can be open at its lower end to allow the applicator element to pass through at least partially when the applicator is mounted on the container. The rod can be in leaktight bearing contact substantially perpendicular to the lengthwise axis of the rod on an inner surface of the wiper element thereby closing the container in a leaktight manner when the applicator is mounted on the container.