Fixed Quantity Discharge Device for Liquid Containers
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Solution Overview
Problem
Existing methods for withdrawing a predetermined quantity of liquid contents from containers, such as cosmetics, are inefficient due to issues with individual packaging and the cumbersome use of pipette or syringe structures, which fail to accurately extract and use small quantities without additional manipulation.
Innovation Solution
A fixed quantity discharge device that includes a pipette part with a pipette tube, a support, and a screw cap system allowing the pipette part to be separated from the container cap, enabling the suction and discharge of contents into the pipette tube without additional manipulation, with a check valve to prevent contamination and air introduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual packaging method is used, then contents can be completely used at one time, but a relatively large quantity of contents remains after use making it inefficient
Solution Approach 1:
The invention divides the container system into separable components: a container body and a removable cap assembly with integrated pipette. This allows users to withdraw exact portions by separating the cap from the container body, eliminating waste from both individual packaging and traditional open container designs.
2Ease of operation
If pipette structure with rubber compressible part is used, then contents can be withdrawn, but suctioned quantity changes according to pushing extent making it difficult to withdraw exact predetermined quantity
Solution Approach 1:
The pipette tube is pre-filled with a predetermined quantity of contents during manufacturing. When the cap is separated from the container body, this fixed amount is automatically drawn into the pipette, eliminating the need for users to manually control suction quantity and ensuring precise dosage.
3Quantity of substance
If syringe structure with small diameter and small stroke piston is used, then very small quantity can be handled, but piston must be pulled and pushed making it cumbersome to use
Solution Approach 1:
The invention merges the cap structure with the pipette mechanism into a single integrated assembly. Users simply detach the cap from the container body to activate the fixed quantity discharge, eliminating the need for separate syringe-like manual pumping operations while maintaining precise small quantity delivery.
4Ease of operation
If cap is separated to suction contents, then predetermined quantity can be withdrawn without additional manipulation, but contamination and air introduction may occur
Solution Approach 1:
The invention introduces a check valve as an intermediary component between the container body and pipette tube. This valve automatically opens to allow contents flow when the cap is separated, then closes to prevent contamination and air ingress, enabling simple operation while protecting content integrity.
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
Enables precise withdrawal and use of a predetermined quantity of contents without additional manipulation, minimizing container residue and preventing contamination of the pipette tube, while ensuring air-tightness to maintain content quality.
Implementation Method 1
a check valve to prevent contamination and air introduction
Data Source
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AI summary
According to one embodiment of the present invention, a fixed quantity discharge device for a liquid container is provided. The device includes a container main body in which contents are accommodated, a pipette part including a pipette tube to suction and discharge the contents accommodated in the container main body, and a support disposed in an upper portion of the container main body and including a coupling part formed in an upper end portion thereof to be coupled to the pipette part, a tube accommodation part extending from the coupling part to an interior of the container main body such that the pipette tube is inserted into or withdrawn from the tube accommodation part, and a contents inflow hole formed in a lower end portion thereof to communicate with the interior of the container main body, wherein, when the pipette part is separated from the support, the contents accommodated in the container main body may be suctioned into the pipette tube.