Dual-Arm Mascara Applicator with Spring-Connected Arms
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Solution Overview
Problem
Existing two-arm cosmetic applicators fail to securely close cosmetic containers, leading to potential leaks, especially when used on-the-go, due to a friction fit closure mechanism that can loosen under unfavorable conditions.
Innovation Solution
A two-arm cosmetic applicator with spring-connected arms, featuring a two-part closure element with a threaded design that screws onto the container, providing a secure and leak-proof seal with a coarse thread pitch, ensuring reliable closure and easy operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a friction fit closure mechanism is used to close the cosmetic container, then the closure mechanism is simple in structure, but the reliability of the closure is insufficient and leaks may occur
Solution Approach 1:
The invention changes the closure mechanism from a simple friction fit to a threaded screw closure. The thread parameters (pitch, diameter, engagement length) are specifically designed to provide secure fastening. The spring element introduces a force parameter that automatically maintains closure pressure, compensating for variations in friction conditions and ensuring reliable sealing even during transport.
Solution Approach 2:
The spring element introduces dynamic functionality to the closure system. It automatically adjusts the closure force based on the container neck dimensions and sealing requirements, maintaining optimal sealing pressure throughout use. The spring's elastic deformation provides continuous adaptation to minor variations in the container-neck interface.
2Reliability
If a threaded closure mechanism is used to securely close the cosmetic container, then the closure reliability is improved, but the device complexity increases
Solution Approach 1:
The invention merges the closure element with the applicator arm structure. The threaded closure element is integrated into one of the applicator arms, combining the application function and the closure function into a single component. This reduces the number of separate parts and simplifies the overall device while maintaining reliable threaded closure.
Solution Approach 2:
The applicator arm serves multiple functions: it applies cosmetic product to the user and simultaneously serves as the closure element for the container. The spring element also provides multiple functions: it maintains closure force, centers the applicator in the container neck, and compensates for dimensional variations. This multi-functionality reduces the need for separate components.
3Device complexity
If the applicator arms are connected rigidly, then the applicator structure is simple, but the applicator cannot adapt to different container sizes and sealing pressures
Solution Approach 1:
The spring element provides dynamic adaptability, allowing the applicator arms to adjust their position and the closure force automatically. As the container neck dimensions vary, the spring compresses or extends to maintain optimal contact and sealing pressure. This elastic adaptation eliminates the need for multiple fixed-size applicators.
Solution Approach 2:
The spring element changes the mechanical parameters of the applicator system. It introduces variable force and position parameters that adapt to different container specifications. The spring constant and pre-compression are designed to provide appropriate sealing force across a range of container sizes and neck diameters.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution ensures a secure closure of the cosmetic container, reducing the risk of leaks and maintaining hygiene by providing a precise sealing pressure, even when the applicator is not handled carefully, and allows for easy cleaning of the applicator arms.
Implementation Method 1
The two applicator arms are connected by a spring element that is preferably molded onto them
Implementation Method 2
The two-part applicator-side closure element formed in this way is equipped with a thread and can be screwed onto a container-side closure element which is an integral or attached part of the cosmetic container
Implementation Method 3
a very precisely defined sealing pressure can be generated very easily, i.e. a pressure with which, for example, a section of the applicator intended for sealing on the cosmetics container against a seal
Data Source
Figure 1~2
Figure 3~6
Figure 7~8
AI summary
The cosmetic unit (1) has a storage container (7) and a mascara applicator with two applicator arms (3a,3b) carrying applicator elements (4a,4b), where the arms are interconnected by a spring element (6). The mascara applicator has a bipartite applicator-side closure elements (5a,5b) for closing the container. The closure element has a bipartite threaded portion, whose primary and secondary portions are formed on respective portions of closure element, such that the closure element can be screwed on to a container-side closure element (17). An independent claim is included for mascara unit.