Liquid Cosmetic Case Screw-Piston Dispensing With Check Valve Shutoff
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Solution Overview
Problem
Conventional cosmetics cases with ejecting mechanisms suffer from noise during operation, inefficient liquid control, and structural complexity, leading to cosmetic leakage and increased costs.
Innovation Solution
A cosmetics case design featuring a lower body that turns, incorporating a piston and screw rod system with a check valve that opens and closes a through hole to control the ejection of liquid cosmetics to a brush, utilizing a spring-powered check valve to regulate the flow and prevent leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a one-way turning guide element is used in the prior art cosmetics case, then the piston can be moved in one direction, but the construction becomes complicated and returning is not possible
Solution Approach 1:
The patent removes the one-way turning guide element from the system entirely. Instead of using a complex guided mechanism, the invention uses a simple screw rod that naturally provides directional movement through its threaded structure, eliminating the need for separate guide elements and reducing overall construction complexity.
Solution Approach 2:
The screw rod serves multiple functions simultaneously: it acts as both the driving mechanism for piston movement and the guiding mechanism. The threaded structure inherently provides both the force transmission and the directional constraint, combining what were previously separate functions into a single component.
2Device complexity
If a check valve is not properly implemented, then the structure remains simple, but unwanted flow of cosmetics occurs when there is a small impact or if positioned reversely
Solution Approach 1:
The check valve acts as an intermediary component between the piston and the cosmetics reservoir. It selectively allows flow in the desired direction while blocking reverse flow, mediating the interaction between the mechanical piston movement and the liquid cosmetics to prevent unwanted flow during impacts or reverse positioning.
Solution Approach 2:
The check valve is positioned to preemptively prevent reverse flow before it can occur. By being installed in the flow path ahead of potential reverse movement, it blocks unwanted cosmetics flow in advance, preventing rather than reacting to the problem.
3Ease of operation
If the rod moving cap is rotated in the prior art design, then the spring interferes with the cap, causing noise and making rotation not go smoothly
Solution Approach 1:
The patent removes the rod moving cap and spring assembly from the system. By eliminating these components, the source of noise and rotation interference is completely removed, allowing for smooth, quiet operation of the piston mechanism through direct screw rod engagement.
4Ease of manufacture
If the piston is insertingly joined to the rod in the prior art, then the joint is simple, but the piston is easily separated by a small impact
Solution Approach 1:
The piston joint uses an asymmetric threaded connection where the screw rod threads engage with corresponding threads in the piston. This asymmetric threaded interface provides both simplicity in manufacture and high reliability, as the threaded engagement creates a strong mechanical bond that resists separation from impacts while maintaining ease of assembly.
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 enables precise control over the ejection and closure of cosmetics, reducing noise and leakage, while simplifying the mechanism and reducing costs by ensuring cosmetics are only dispensed when the lower body is turned and pressure is applied.
Implementation Method 1
the spring power of the spring which is installed inside the upper inside hole
Implementation Method 2
a piston in an inner portion of the lower body which is moved lower to press the cosmetics inside. The piston is aligned with a screw rod and moved by the turning of the lower body of the container
Data Source
AI summary
A cosmetics case comprising a cosmetics case having a lower body of the case is turns, and a piston in which is applied in inner portion of the lower body is moved lower to press the inside, with aligned to a screw rod by the turning of the lower body of the container, and thus, a check valve of which installed in upper inside hall which formed upper portion of inside of the screw rod, is pressed open then, opened a through hole, therefore, the liquid cosmetics which stored inside of the lower body is passed through a perpendicular hole, a through hole, an upper inside hole and an liquid transfer tube which formed an ejecting hole, then ejecting the liquid to a brush portion with a determined quantity of the cosmetics; The lower body is stops turning, concurrently with; to lower pressure of the inside of the lower body, and the check valve returned to the origin state by the spring power of the spring which installed inside of the upper inside hole and, close off the through hole, therefore the cosmetics can not ejecting out more; thus can easily control the ejecting and close off the cosmetics liquid.