Cylindrical Cosmetic Container with Phased Inner Protrusions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cosmetic containers with convex ribs on the outer surface suffer from motion resistance issues during cap closure, leading to incomplete sealing, grime accumulation, and a compromised appearance.
Innovation Solution
A tubular cosmetic container design featuring a cap with first and second protrusions on its inner surface, providing distinct sliding resistances to ensure complete closure without external convex ribs, maintaining a clean and aesthetically pleasing appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a convex rib is formed on the outer circumferential surface of the container body to increase stability, then the cap can be securely positioned, but motion resistance occurs during closure and the appearance quality deteriorates
Solution Approach 1:
The patent inverts the conventional design by moving the protrusion from the outer surface of the container body to the inner surface of the cap. This inversion eliminates the external convex rib that causes appearance deterioration and grime accumulation, while the internal first and second protrusions maintain cap positioning stability through controlled motion resistance during closure
Solution Approach 2:
The patent segments the cap structure into an outer cap and an inner cap, with the protrusions formed on the inner cap's inner peripheral surface. This segmentation allows the protrusions to be strategically positioned to provide phased motion resistance (first protrusion for initial positioning, second protrusion for final sealing) without compromising the overall appearance of the container
2Stability of the object's composition
If a thick-walled portion is formed on the inner part of the cap to increase stability, then the cap can be securely mounted, but motion resistance occurs and complete covering cannot be confirmed
Solution Approach 1:
The patent divides the cap into outer cap and inner cap components, with the inner cap containing the protrusions on its inner peripheral surface. This segmentation enables precise control of the protrusion positions to provide phased motion resistance, ensuring the cap is completely mounted over the container body while maintaining stability
Solution Approach 2:
The patent applies local quality by forming protrusions at specific locations on the inner peripheral surface of the inner cap. The first protrusion provides localized motion resistance for initial positioning, while the second protrusion provides additional localized resistance for final sealing, ensuring complete covering without excessive motion resistance throughout the entire cap structure
3Strength
If a convex rib projects toward the outer circumferential surface, then structural support is provided, but grime accumulates at the rising edge and is difficult to remove
Solution Approach 1:
The patent inverts the rib design by placing protrusions on the inner surface of the cap rather than on the outer surface of the container body. This inversion eliminates the external rising edge where grime accumulates, while the internal protrusions provide the necessary structural support and motion resistance for proper cap positioning
Solution Approach 2:
The patent extracts the protrusion feature from the external surface of the container body and relocates it to the internal surface of the cap. This extraction removes the source of grime accumulation (the external convex rib with its rising edge) while preserving the functional benefits of motion resistance and stable positioning through the internal protrusions
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 container achieves stable and complete cap closure with phased resistances, preventing grime accumulation and enhancing the cosmetic container's appearance and functionality.
Implementation Method 1
A first protrusion is formed on an inner peripheral surface of the cap. A first slide resistance occurs as the to-be-covered portion is pressed into sliding contact with the first protrusion from a halfway covering posture to at least an immediately preceding covering posture
Implementation Method 2
A second protrusion also is formed on the inner peripheral surface of the cap. A second slide resistance that is greater than the first slide resistance occurs as the to-be-covered portion is pressed into sliding contact with the second protrusion from the immediately preceding covering posture to the fully covering posture
Data Source
Figure 1
Figure 2A~2E
Figure 3A~3B
AI summary
A tubular cosmetic container has a cap (10) fit outside a container body (1), a cap body (11), an inner cap (12,18) fit inside the cap (10), and a to-be-covered portion. The inner cap (12,18) is formed with a first protrusion (12b,18c) located at a halfway covering posture during the course of covering the container body (1) from the halfway covering posture through an immediately preceding covering posture to a fully covering posture and applying a first slide resistance by being pressed into sliding contact with the container body (1), and a second protrusion (12c,18f) located at the immediately preceding covering posture of covering the container body (1) and applying a second slide resistance larger than the first slide resistance by being pressed into sliding contact with the upper end of the container body.