Soft Cosmetic Pen Point with Curved Application Surface
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Solution Overview
Problem
Conventional cosmetic material application containers often catch on the skin, making it difficult to draw intended cosmetic lines smoothly and stably.
Innovation Solution
A cosmetic material application container with a pen point portion formed from a soft material, featuring a three-dimensionally constructed flat column body with a flat base end shape and a leading end shape that forms an arcuate curve inclining towards the base end, preventing catching and allowing smooth application of cosmetic lines of various thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pen point portion is made with a simple cut structure, then the device complexity is reduced, but the cosmetic material line cannot be drawn stably and easily
Solution Approach 1:
The pen point portion is designed with a curved application surface that bulges toward the leading end side, replacing simple flat or angled cuts. This curved geometry allows the pen point to smoothly follow the skin contour and prevents catching, enabling stable and easy drawing of cosmetic material lines while maintaining a relatively simple overall structure
Solution Approach 2:
The invention changes the geometric parameters of the pen point portion by defining a specific curved surface shape with controlled bulging toward the leading end. This parameter modification transforms the interaction between the pen point and skin, preventing catching without requiring complex mechanical structures
2Object-affected harmful factors
If the pen point portion has a simple flat shape, then the manufacturing precision is easier to achieve, but the pen point catches on the skin
Solution Approach 1:
The application surface of the pen point portion is designed to bulge toward the leading end side, creating a curved profile that prevents catching on the skin. This curved geometry allows the pen point to roll smoothly along the skin surface rather than catching, while the curvature can be achieved through standard molding processes
Solution Approach 2:
The invention transitions from a two-dimensional flat or angled cut surface to a three-dimensional curved surface that bulges in the longitudinal direction. This dimensional addition creates a rolling contact mechanism that prevents catching while maintaining manufacturing feasibility through conventional molding techniques
3Stability of the object's composition
If the pen point portion is rigid, then the structural strength is improved, but it cannot deflect to follow skin contour
Solution Approach 1:
The pen point portion is constructed from a soft material that allows controlled deflection along its long axis while maintaining its overall shape. This flexibility enables the pen point to adapt to skin contours and drawing angles without compromising structural integrity or causing catching
Solution Approach 2:
The pen point portion is designed with dynamic characteristics by using soft material that allows deflection along the long axis. This dynamic property enables the pen point to adjust its orientation during use to follow skin contours and maintain stable contact, while the curved application surface provides geometric stability
Data Source
AI summary
A cosmetic material application container which can stably and easily draw a cosmetic material line, and is structured to discharge a cosmetic material in a filling region from a pen point portion formed by a soft material. A pen point portion shape is three-dimensionally formed by structuring a flat column body by a flat base end shape and a leading end shape provided closer to a leading end side than the base end shape, setting such an arcuate curve as to incline while heading for a base end side from one intersecting point between an outer edge of the leading end shape and a long axis (L2) and bulge to the leading end side, on a plane including a long axis (L1) and the long axis (L2), and cutting the flat column body by a cut surface passing through the curve.