Oval Cosmetic Stick Container With Asymmetric Moving Hole
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Solution Overview
Problem
Existing stick-shaped cosmetic material feeding containers struggle to accommodate oval cross-sectional shaped cosmetics efficiently, leading to potential breakage due to stress applied in specific directions, and fail to achieve a slim and compact leading end design.
Innovation Solution
The container features a stick-shaped cosmetic material support body with four support pieces that align with inclined surfaces of the cosmetic, a forward and backward moving hole with flat inner surfaces at the short diameter side, and a rectangular cross-sectional shape, preventing breakage by distributing stress and allowing efficient movement of the cosmetic within a slim and compact container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the stick-shaped cosmetic material has an oval cross sectional shape, then it can draw both thin and thick lines, but the container cannot achieve a slim and compact shape
Solution Approach 1:
The forward and backward moving hole is designed with an asymmetric cross-sectional shape that matches the asymmetric oval shape of the cosmetic material. The hole has a long diameter side and a short diameter side, with the short diameter side being flattened to accommodate the cosmetic material's geometry. This asymmetric design allows the oval cosmetic material to be held securely while enabling the container to achieve a slim and compact overall shape.
2Ease of operation
If the cosmetic material is held by support pieces, then it can be moved forward and backward, but stress in the short diameter direction may cause breakage
Solution Approach 1:
The forward and backward moving hole is designed with locally differentiated properties: the long diameter side maintains a curved surface to accommodate the cosmetic material's curvature, while the short diameter side is flattened to provide enhanced support and stress distribution. This local quality change in the hole's cross-sectional shape prevents concentration of stress on the cosmetic material's short diameter side, thereby preventing breakage while maintaining ease of forward and backward movement.
3Productivity
If the forward and backward moving hole has a rectangular cross section, then it can efficiently accommodate the cosmetic material and support pieces, but the inner peripheral surfaces must be precisely shaped
Solution Approach 1:
The forward and backward moving hole employs an asymmetric cross-sectional shape that naturally conforms to the oval cosmetic material. The long diameter side and short diameter side are designed with specific curvature and flatness characteristics that match the cosmetic material's geometry. This asymmetric design allows the hole to efficiently accommodate both the cosmetic material and the support pieces, while the shapes can be achieved through standard molding processes without requiring excessive manufacturing precision.
Data Source
AI summary
To make a container shape slim and compact and prevent breakage of a stick-shaped cosmetic material, a stick-shaped cosmetic material (M) having a cross sectional shape with long and short diameters is used, four support pieces (7b) supporting a rear end portion of the cosmetic material (M) support inclined surfaces (Ma) between the long and short diameters, a forward and backward moving hole (4a), in which the cosmetic material (M) and the support pieces (7b) move, is formed in a cross sectional shape with long and short diameters, and has flat short diameter side inner surfaces (4aa), the short diameter side inner surfaces (4aa) come close to short-diameter side outer surfaces (Mb) of the cosmetic material (M), and inner surfaces (4ab) at the support piece (7b) side come close to outer surfaces (7bb) at an outer side in the short diameter direction of the support pieces (7b).