Cosmetic Applicator with Rotating Plug Valve and Actuating Base
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Solution Overview
Problem
Existing cosmetic applicator devices, such as mascara applicators, have unsatisfactory ergonomics, requiring users to actuate multiple control members sequentially without guidance, leading to potential product leakage or drying out due to accidental actuation.
Innovation Solution
A cosmetic applicator device with a rotatable plug valve control member and a base that moves along a defined actuating path, ensuring proper sequence and reducing the risk of accidental actuation, featuring a resilient piston and wringer mechanism for continuous seal maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple control members are provided for operating the applicator device, then the functionality is improved, but the ease of operation deteriorates due to the need to sequentially actuate controls without guidance
Solution Approach 1:
The patent combines multiple control functions into a single integrated control member that simultaneously manages both the plug valve opening and the rod ejection sequence. This merging eliminates the need for separate control members while maintaining full functionality, directly resolving the contradiction between versatility and ease of operation.
Solution Approach 2:
The control member is designed with a predetermined motion path that automatically performs actions in the correct sequence: first opening the plug valve, then ejecting the rod. This preliminary design of the action sequence eliminates the need for user guidance while maintaining functional completeness.
2Adaptability or versatility
If multiple control members are provided, then the functionality is improved, but the reliability deteriorates due to accidental actuation
Solution Approach 1:
By merging multiple control functions into a single control member with a specific motion path, the patent eliminates the possibility of accidentally actuating separate controls. The integrated design ensures that both functions are controlled through one deliberate user action, resolving the reliability issue while maintaining functionality.
Solution Approach 2:
The single control member acts as an intermediary that mediates between the user and the two functions (valve opening and rod ejection). This intermediary ensures proper sequencing and prevents accidental activation by requiring a specific combined motion rather than separate control actions.
3Ease of operation
If the plug valve control member is made rotatable about the central axis, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The rotatable control member about the central axis serves multiple functions: it opens the plug valve, controls the rod ejection sequence, and provides a familiar user interface. This multi-functionality justifies the increased complexity by eliminating the need for separate control mechanisms.
Solution Approach 2:
The control member transitions from a static position to a dynamic rotational motion about the central axis, enabling it to perform multiple functions through a single continuous movement. This dynamic design improves ease of operation while the complexity is managed through the elegance of the rotational mechanism.
Data Source
AI summary
The invention relates to a product applicator device comprising: a reservoir that extends along a central axis between a proximal end and a distal end; a cap that is connected to the distal end of the reservoir, said cap having an opening along the central axis; a spherical plug valve mounted such that it can pivot in the cap in order to selectively open and close the reservoir; and a rod extending along the central axis as far as an applicator head, which rod can move axially between retracted and extending positions. The plug valve is opened and the rod is subsequently extended by actuating a base which is mounted such that it can move with respect to an external body that is solidly connected to the cap.