Applicator Dual Coupling Mechanism for Leakage Prevention
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Solution Overview
Problem
Existing applicators face challenges with easy positioning and assembly during manufacturing, and there is a risk of liquid leakage due to insufficient press-fitting between the front barrel and barrel cylinder, especially when handling high-viscosity cosmetic liquids.
Innovation Solution
The applicator features a full coupling portion and a temporary coupling portion on both the front barrel and barrel cylinder, with anti-rotation ribs that engage only in the fully coupled state, allowing for easy initial positioning without interference and enhancing assembly workability, along with a propelling mechanism using a screw shaft, rotary cam body, and transmission cam body to efficiently supply the cosmetic liquid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the front barrel is temporarily coupled to the barrel cylinder using a stopper ring, then the assembly workability is improved, but the positioning precision may be insufficient leading to liquid leakage
Solution Approach 1:
The coupling structure is divided into two distinct segments: a temporary coupling portion for easy assembly during manufacturing, and a full coupling portion for secure final positioning. This segmentation allows the front barrel to be initially attached without precise positioning requirements, then later secured with proper alignment to prevent liquid leakage.
Solution Approach 2:
The temporary coupling portion enables preliminary attachment of the front barrel to the barrel cylinder before final positioning. This preliminary action allows assembly to proceed without precise alignment initially, improving manufacturability, while the subsequent engagement of anti-rotation ribs ensures proper positioning is achieved before the product reaches the consumer.
2Manufacturing precision
If the anti-rotation ribs are engaged in the initial coupled state, then the positioning precision is improved, but the assembly workability deteriorates due to alignment requirements
Solution Approach 1:
The coupling system transitions dynamically from a loose temporary coupling state during assembly to a locked full coupling state after assembly. The anti-rotation ribs are designed to be disengaged during initial assembly to allow easy attachment, then engaged in the final state to provide secure positioning and prevent rotation, effectively adapting the positioning constraint based on the assembly stage.
3Ease of operation
If the front barrel is press-fitted without proper positioning, then the assembly process is simplified, but liquid leakage occurs due to insufficient press-fitting
Solution Approach 1:
The temporary coupling portion acts as an intermediary mechanism that facilitates easy initial attachment of the front barrel without requiring precise positioning or complex press-fitting operations. This intermediary structure allows assembly simplicity while the subsequent engagement of the full coupling portion with anti-rotation ribs ensures proper sealing performance prevents liquid leakage.
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
This design ensures secure and efficient positioning of the front barrel to the barrel cylinder, preventing liquid leakage and improving manufacturing efficiency by allowing free positioning in the initial state and proper alignment in the fully coupled state, while the propelling mechanism effectively handles high-viscosity liquids.
Implementation Method 1
a screw shaft threaded on the peripheral surface thereof
Implementation Method 2
a rotary cam body; and a transmission cam body, wherein a threaded portion mating the screw shaft is provided in the rear of the storage portion, the rotary cam is turned by a propelling operation to the propelling body so as to relatively rotate the screw shaft
Data Source
AI summary
An applicator which comprises an application body arranged inside the front part of a barrel cylinder supplying the application body with the application liquid stored in a storage portion in the barrel cylinder, and is configured such that: a full coupling portion and a temporary coupling portion are formed on each of a front barrel and the barrel cylinder; the front barrel and the barrel cylinder each have an anti-rotation rib; the anti-rotation ribs are not engaged with each other in the initial coupled state before the temporary coupled state in which the temporary coupling portions of the barrel cylinder and the front barrel are engaged with each other; and, the anti-rotation ribs become engaged with each other in the fully coupled state in which the full coupling portions are engaged with each other.