Nail Polish Container Dual Hand Constriction Design

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Solution Overview

Problem

Existing nail application containers require being put down to switch hands, risking damage to coated surfaces and are cumbersome for continuous use.

Innovation Solution

A container with two spaced constrictions, one for each hand, allowing users to pass the container from one hand to the other without putting it down, facilitating continuous use and reducing the risk of damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a single constriction is provided on the container, then the container structure is simple, but the user must put down the container to switch hands, increasing the risk of damage to coated surfaces and reducing ease of operation

Engineering Contradiction:

Improveease of hand switchingVSAvoidcontainer structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The container's side wall is segmented into two separate constrictions (first constriction and second constriction) positioned at different locations. This segmentation allows each constriction to independently receive fingers from different hands, enabling the user to switch hands without putting down the container while maintaining a relatively simple overall structure.

Inventive Principle:

Principle #1Segmentation

2Reliability

If the constriction covers about three-quarters of the finger periphery, then the container provides secure finger reception, but removing the fingers becomes laborious and risks damaging coated surfaces

Engineering Contradiction:

Improvefinger reception securityVSAvoidfinger removal ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

Each constriction is designed with specific local geometry featuring two grooves that cover approximately half the periphery of the fingers (not three-quarters), providing sufficient secure reception while leaving enough space for easy finger insertion and removal. This local quality optimization balances security with ease of operation.

Inventive Principle:

Principle #3Local quality

3Productivity

If the container is designed for single-hand use, then the structure is simple, but the user cannot continuously apply composition without putting down the container, reducing productivity

Engineering Contradiction:

Improvecontinuous application capabilityVSAvoidcontainer design

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The container is designed with universal functionality to be held by either the first hand or the second hand through its two constrictions. This multi-functionality allows the user to continuously apply composition by switching hands without putting down the container, significantly improving productivity while adding only minimal structural complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS9491998B2Container, a device including such a container, the use of such a device and a method of applying a composition on the nails

Publication Date: 2016.11.15 LVMH RECH

AI summary

Container for receiving a composition, a device including such a container, a use and a method for applying the composition contained in such a container on the nails, the container comprising a side wall that extends along a central axis between a bottom and an opening, the side wall presenting a first outside constriction shaped to receive two adjacent fingers, other than the thumb, of a first hand of a user. The side wall also includes a second outside constriction shaped to receive two adjacent fingers, other than the thumb of a second hand of the same user, the second constriction being spaced apart from the first constriction along the central axis.