Soft Resin Overcap Tube Shape for Stick Cosmetic Containers
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Solution Overview
Problem
Conventional stick-type cosmetic containers with caps made of hard synthetic resin are prone to damage from external forces, difficult to separate from the container body due to slipping, and limited in printing options to only one-color or two-color designs.
Innovation Solution
An overcap with a tube shape made of soft synthetic resin, featuring a widened upper portion and a coupling joint of hard synthetic resin or metal, which allows easy separation and coupling with the container body and enables various color and pattern printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cap is made of hard synthetic resin to improve strength and durability, then the cap becomes resistant to damage, but it becomes difficult to separate from the container body due to slipping when gripped
Solution Approach 1:
The patent changes the material parameter of the cap from hard synthetic resin to soft synthetic resin. This material parameter change allows the cap to be easily gripped and separated while maintaining sufficient durability through the soft material's flexibility and shock absorption properties.
2Stability of the object's composition
If the cap is made of hard synthetic resin to maintain shape stability, then the cap retains its cylindrical shape, but it becomes prone to damage when dropped or subjected to excessive external force
Solution Approach 1:
The patent changes the material parameter from hard to soft synthetic resin, which fundamentally alters the mechanical properties. The soft material provides shock absorption and flexibility, enabling the cap to withstand drops and external forces without damage while maintaining functional shape stability through elastic recovery.
Solution Approach 2:
The patent uses a composite structure combining soft synthetic resin for the main cap body with a coupling joint made of hard synthetic resin or metal. This composite approach allows the cap to benefit from both the shock absorption of soft material and the structural integrity of hard material at the coupling interface.
3Ease of manufacture
If the cap surface is smoothly treated to improve product quality, then the cap has a refined appearance, but slipping occurs frequently when the user grips and pulls the cap
Solution Approach 1:
The patent changes the surface parameter from smooth to textured. The textured surface treatment provides increased friction and grip stability while maintaining aesthetic appeal, solving the contradiction between smooth appearance and grip stability.
4Manufacturing precision
If the cap is made of hard synthetic resin to enable precise printing, then one-color and two-color printing can be achieved, but various colors and patterns cannot be implemented
Solution Approach 1:
The patent changes the material parameter from hard to soft synthetic resin, which fundamentally alters the printing capabilities. The soft material allows for various printing methods including multi-color and pattern printing, significantly enhancing printing versatility while maintaining manufacturing precision.
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
The soft synthetic resin overcap minimizes damage from external forces, improves ease of separation and coupling by deforming under user grip, and allows for diverse printing options, enhancing user convenience and product aesthetics.
Implementation Method 1
the overcap is provided in the tube shape which includes a soft synthetic resin as a constituent material... a shape is not deformed by a gripping force of a user
Data Source
AI summary
An overcap with a tube shape for a stick-type cosmetic container is provided. The stick-type cosmetic container includes a container body configured to store solid contents or liquid contents and the overcap coupled to the container body, in which the container body and the overcap are provided as a long stick type. The overcap is provided in the tube shape which includes a soft synthetic resin as a constituent material and of which a width is increased toward an upper portion that is sealed, and a coupling joint made of a hard synthetic resin or metal material is provided in an inner diameter of an open lower portion of the overcap to prevent shape deformation while being connected to the container body through a hanging method or screw coupling method.