Dispensing Container Valve Prevents Leakage
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Solution Overview
Problem
In existing dispensing containers, content that has not been returned to the internal container can leak out of the discharge port after discharge, due to the check valve operating only after the content has been depleted.
Innovation Solution
A dispensing container design featuring a discharge cap with an inside plug member, a cylindrical body member, and a valve body that slides along an axial direction to open and close a communication port, allowing content to be discharged and then preventing leakage by introducing external air into the discharge port, using an over-cap with a seal part to ensure the content remains inside.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a check valve is used to prevent content leakage after discharge, then content leakage is prevented, but the valve operates only after content depletion causing residual content to leak
Solution Approach 1:
The valve body is designed to operate in advance by closing the communication port before the check valve activates. This preliminary action prevents residual content from leaking by sealing the discharge path early in the discharge process, rather than waiting for the check valve to operate after content depletion.
2Reliability
If the valve body closes the communication port early, then content leakage is prevented, but the discharge efficiency is reduced
Solution Approach 1:
The valve body is designed to dynamically adjust its position based on pressure differential. During discharge, positive pressure from the internal container pushes the valve body to the open position, maintaining full discharge efficiency. After discharge, negative pressure pulls the valve body to the closed position, preventing leakage. This dynamic operation resolves the contradiction between early closure and discharge efficiency.
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
Prevents content from leaking out of the discharge port after discharge by ensuring it is reintroduced into the internal container and external air is sucked in, maintaining container integrity and usability.
Implementation Method 1
a valve body is arranged and fitted in the communication port so as to be slidable along an axial direction of the communication port, the valve body being elastically displaced along the axial direction so as to open and close the communication port
Implementation Method 2
the dispensing container is tilted in a discharge posture so that the discharge port is directed downward and the dispensing container is then pressed radially inward to cause the pressure inside the internal container to increase and to thereby cause the content in the internal container to press the valve body
Implementation Method 3
an external container in which the internal container is attached, the external container being provided with a suction port for sucking external air in between the internal container and the external container
Data Source
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AI summary
After discharging content, the content which has not been returned to an internal container is prevented from leaking out of a discharge port. In order to achieve this object, the present invention provides a dispensing container 10 comprising: a container body 13 having an internal container 11 which contains content and an external container 12 in which the internal container 11 is attached, the external container 12 being provided with a suction port 19 for sucking external air in between the internal container 11 and the external container 12; and a discharge cap 15 which is attached to a spout 13a of the container body 13 and provided with a discharge port 14 for discharging the content, wherein: the discharge cap includes an inside plug member 21 which closes the spout 13a and a cylindrical body member 23 having a top-closed cylindrical shape, the cylindrical body member 23 covering the inside plug member 21 and being provided with the discharge port 14; the inside plug member 21 is provided with a communication port 43 which communicates the discharge port 14 and the inside of the internal container 11; and a valve body 44 is arranged and fitted in the communication port 43 so as to be slidable along an axial direction O of the communication port 43, the valve body 44 being elastically displaced along the axial direction O to open and close the communication port 43.