Cosmetic Container Airtight Refill Case Butterfly Hinge Sealing
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Solution Overview
Problem
Existing refill cases for cosmetics like moisture-containing compact powder, cream, and eye shadow are not sufficiently hermetically sealed, leading to quality degradation due to air contact and vaporization of moisture or volatile components, resulting in short product lifespan.
Innovation Solution
A double airtight structure is achieved by coupling a lower main body and upper lid with a butterfly hinge, using a ring-shaped assembly groove and protrusion system without packing, and forming pressing protrusions on the upper lid to ensure hermetic sealing when the outer container lid is closed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate packing is used for hermetic sealing by pressing, then sealing function is provided, but airtightness is difficult to maximize and deteriorates when packings loosen or wear
Solution Approach 1:
The invention extracts and eliminates the separate packing material from the sealing system. Instead of using a distinct sealing component, the case body itself forms the sealing surface through precisely machined protrusions and grooves that interlock to create hermetic sealing, thereby removing the reliability issues associated with separate packings loosening or wearing
Solution Approach 2:
The invention changes the sealing mechanism from a soft material deformation approach (packing pressed against surface) to a rigid geometric interlocking approach (protrusion fitting into groove). This parameter change in the sealing principle eliminates wear and loosening problems by using precise dimensional relationships rather than material compliance
2Reliability
If the upper lid is pressed once during assembly, then basic sealing is achieved, but airtightness is insufficient to prevent moisture vaporization and air contact
Solution Approach 1:
The invention incorporates a preliminary pressing action during the assembly process that pre-compresses the sealing interface between the upper lid and case body. This preliminary action ensures optimal contact pressure is established before the product enters service, creating enhanced hermetic sealing that prevents air and moisture infiltration
Solution Approach 2:
The pressing action is segmented into multiple stages: initial assembly positioning, preliminary pressing during assembly, and final sealing confirmation. This segmentation ensures each aspect of sealing is addressed systematically, achieving comprehensive airtightness that prevents harmful factors from contacting the cosmetic
Data Source
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AI summary
The present invention relates to a cosmetic container having an airtight refill case that hermetically keeps a cosmetic such as a moisture-containing compact powder, a moisture-containing cream, and an eye shadow. More particularly, it relates to a cosmetic container having an airtight refill case 20 that is more hermetically sealed in a double airtight structure by coupling a lower main body 21 and an upper lid 25 of the refill case 20 with a butterfly hinge and by fitting an assembly groove part 22 having ring-shaped assembly protrusions 23 to an assembly protrusion part 26 having ring-shaped assembly grooves 27 without a specific packing, in which the upper lid of the refill case is pressed by pressing protrusions 30 on the upper lid, when an outer container lid is closed.