Diaper Cream Applicator with Dual Threads and Sealing Lid
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Solution Overview
Problem
Applying ointment from a tube requires two hands, making it difficult to apply to a baby during a diaper change, and existing solutions do not ensure a sanitary and mess-free process.
Innovation Solution
A cream applicator with dual screw threads, a nozzle and soft flexible tip with an opening flap for smooth application, and a lid with a protruding tongue for a leakproof seal, allowing for one-handed use with tubes of varying neck diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional tube applicator is used, then cream can be applied, but two hands are required making it difficult to use during diaper changes
Solution Approach 1:
The applicator tip is integrated directly onto the tube opening, combining the dispensing function and application function into a single unit. This eliminates the need for separate applicators and enables one-handed operation while maintaining simplicity
Solution Approach 2:
A finger-actuated squeezing mechanism serves as an intermediary between the user's finger and the cream tube, allowing one-handed operation by translating finger pressure into controlled cream dispensing
2Ease of operation
If the tube is left open for application, then cream can be accessed, but the cream dries out and loses freshness
Solution Approach 1:
The cap is designed to automatically reseal the tube immediately after cream application, performing the sealing action beforehand before the user needs to store the tube again. This preliminary sealing prevents cream drying out
Solution Approach 2:
A flexible membrane acts as an intermediary between the cream and the external environment, allowing cream to be accessed while maintaining a barrier that prevents drying and contamination when not in use
3Productivity
If a brush or sponge applicator is used, then cream can be applied, but the application is not smooth or even
Solution Approach 1:
The applicator tip features a specific localized geometry with a flat distal end and controlled opening structure, providing smooth and even cream distribution at the application point without requiring complex brush or sponge mechanisms
4Adaptability or versatility
If the applicator is designed for one tube size, then the structure is simple, but it cannot accommodate tubes with different neck diameters
Solution Approach 1:
The cap is designed with multiple sets of screw threads that can accommodate different tube neck diameters, making a single cap design universal for various tube sizes while maintaining a relatively simple overall structure
Data Source
AI summary
An improved applicator apparatus and lid facilitate one-handed application of diaper rash cream or other therapeutic cream from a squeeze tube. Two sets of female screw threads fit two common neck diameters for squeeze tubes. A nozzle and a soft, flexible, concave tip with opening flap provide smooth and even application of cream. A convex tongue, curved complementary to the concave tip, is attached to the lid's interior. When a squeeze tube is attached to the applicator and stored in the lid, the tongue presses the tip of the applicator apparatus firmly against the opening of the nozzle, creating a leakproof and airtight seal.