Fixed Quantity Discharge Device for Liquid Containers
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Solution Overview
Problem
Existing fixed quantity discharge devices for liquid containers often contaminate the pipette pipe and leave significant residual contents due to exposure and complex mechanisms, making it difficult to accurately dispense a fixed amount without additional manipulation.
Innovation Solution
A device featuring a pipette part with a check valve that opens/closes the content inflow hole, a sealing member to guide contents into the pipette pipe, and a button part that ascends along a guide part on the inner cap, allowing for simple and accurate dispensing without exposing the pipette pipe to the contents, minimizing residual contents and preventing air inflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the entire pipette pipe is inserted into the container body to withdraw contents, then contents can be discharged, but the pipette pipe becomes contaminated by contents and large quantity of residual contents remain on the container wall
Solution Approach 1:
The device divides the pipette pipe into two separate parts: a content suction tube that contacts the contents and a pipette pipe that does not. The suction tube has a content inflow hole at its lower end, while the pipette pipe receives contents from the suction tube through a connection structure. This segmentation allows the suction tube to be exposed to contents for withdrawal while the pipette pipe remains uncontaminated.
Solution Approach 2:
The invention extracts the function of content contact from the pipette pipe itself and assigns it to a separate content suction tube. The suction tube is equipped with a content inflow hole that opens to the container body, allowing it to withdraw contents directly. The pipette pipe then receives these contents through a controlled interface, preventing direct exposure and contamination.
2Extent of automation
If a spring mechanism is used to restore the button part after contents are used, then contents can be sucked back, but the structure becomes very complicated requiring combination of inner cap and button part movements
Solution Approach 1:
The device uses a piston positioned at the lower end of the container body that automatically moves upward as contents are consumed. This preliminary positioning of the piston allows automatic withdrawal of remaining contents through the content suction tube when the button part is pressed, eliminating the need for complex spring restoration mechanisms and multiple component coordinations.
Solution Approach 2:
The piston is designed to automatically ascend as contents are used up, creating a self-regulating mechanism. When the button part is pressed, the piston's position automatically triggers the content suction tube to withdraw remaining contents, and the system self-resets without requiring spring mechanisms or coordinated movements of multiple parts.
3Productivity
If the content inflow hole remains open, then contents can flow freely, but air can inflow into the container body causing contamination
Solution Approach 1:
The invention separates the content withdrawal function from the air prevention function by extracting the air blocking capability to a dedicated check valve mechanism. The check valve is positioned at the content inflow hole and automatically opens to allow contents to flow in while remaining closed to prevent air from entering, thus maintaining both productivity and contamination prevention.
Solution Approach 2:
The check valve acts as an intermediary element between the content inflow hole and the container body. It mediates the flow of substances by allowing contents to pass through while blocking air from entering, thus enabling free content flow without the harmful effect of air contamination.
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 device effectively prevents pipette pipe contamination and minimizes residual contents by ensuring the pipette pipe is not exposed to the contents, while allowing for easy and precise dispensing of a fixed quantity without the need for springs or complex mechanisms.
Implementation Method 1
a check valve which opens/closes a content inflow hole at an inner lower portion of a content suction tube
Implementation Method 2
a piston which moves according to a use of contents inside the container body
Data Source
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AI summary
The present invention relates to a fixed quantity discharge device for a liquid container, comprising: a spuit pipe formed so as to suck contents without being exposed to the contents stored in a container body such that contamination of the spuit pipe due to the contents can be prevented; and a piston rising according to a use of the contents within the container body so as to minimize the remaining contents within the container body.