Slide-Type Cosmetic Container Uniform Sealing Mechanism

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Solution Overview

Problem

Conventional sliding-type compacts face challenges in maintaining a highly hermetic state due to reduced contact pressure between the annular packing and cylindrical rib as projections separate, leading to difficulties in uniformly pressing them together.

Innovation Solution

The solution involves providing slide rails along the entire length of the annular packing area and incorporating a lock mechanism with inclined slide rails and grooves on both the case body and retainer casing to ensure uniform compression and engagement of the annular packing, enhancing the hermetic seal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stress or pressure

If projections are provided at intervals on side walls to lift the dish member upwards, then high contact pressure can be expected at the projection vicinities, but contact pressure is reduced gradually at places as projections separate, making it difficult to uniformly press the annular packing and cylindrical rib together

Engineering Contradiction:

Improvecontact pressure between annular packing and cylindrical ribVSAvoiduniformity of pressing

Core Design Contradiction:

Stress or pressureVSManufacturing precision

Solution Approach 1:

The pressing function is divided into two independent systems: (1) projections on the frame body and dish member provide localized high contact pressure at specific points, and (2) slide rails with inclined surfaces provide continuous linear pressing force along the entire sliding path. This segmentation allows each system to perform its specialized function without interfering with the other, achieving both high localized pressure and uniform overall compression.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The slide rails act as intermediary elements that mediate between the sliding motion and the pressing action. The inclined surfaces of the slide rails convert the horizontal sliding movement into vertical pressing force, providing continuous and uniform compression of the annular packing against the cylindrical rib throughout the entire closing process, while the projections provide additional localized pressure peaks.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Shape

If the case body is fully accommodated within the retainer casing, then the compact assumes a flat rectangular parallelepiped shape with short height, but the annular packing may not be sufficiently compressed to maintain hermetic seal

Engineering Contradiction:

Improvecompact shape and dimensionsVSAvoidhermetic seal

Core Design Contradiction:

ShapeVSReliability

Solution Approach 1:

The slide rails are designed with inclined surfaces that convert the static accommodation position into a dynamic pressing action. As the case body slides horizontally into the retainer casing, the inclined surfaces of the slide rails dynamically generate vertical pressing force that progressively compresses the annular packing, ensuring hermetic seal is achieved during the closing motion itself, not just at the final position.

Inventive Principle:

Principle #15Dynamics

3Stress or pressure

If projections are used to press the packing, then high contact pressure is achieved at projection locations, but the pressing force is not distributed uniformly across the entire annular packing area

Engineering Contradiction:

Improvecontact pressureVSAvoidhermetic sealing quality

Core Design Contradiction:

Stress or pressureVSEase of operation

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The pressing force is extended from a point-based system (projections) to a line-based system (slide rails). The slide rails provide pressing force distributed along the entire length of the annular packing in the sliding direction, adding a dimensional aspect to the pressure distribution that ensures uniform compression across the entire sealing interface.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentEP3597071B1Slide-type cosmetic container

Publication Date: 2022.02.16 YOSHIDA KOGYO KK

Figure 1~2
Figure 3
Figure 4~5

AI summary

In a sliding-type compact, a retainer casing 3 has at least a ceiling plate 3a for covering an upper face 2e of a case 2 body 2 slidably accommodated within the retainer casing and side plates suspended from both sides of the ceiling plate in a direction perpendicular to the sliding direction of the case body. The case body has a downwardly concaved section 2a for containing the cosmetic material, an annular packing 5 encircling the concaved section and extending upwards, and side walls disposed facing the side plates of the retainer casing in a state in which the case body is accommodated within the retainer casing. Either the side plates or the side walls are provided with slide rails 3d extending toward the other of the opposing side plates or side walls, the other of the side plates or side walls not provided with the slide rails are provided with guide grooves 2g to engage with the slide rails when the case body is slid into or out from the retainer casing. When the case body is fully accommodated within the retainer casing and the annular packing is pressed against the ceiling plate, the annular packing is in uniform contact with the ceiling plate.