Pump Dispensing Container Buoyancy Valve Leakage Prevention
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Solution Overview
Problem
Conventional pump-dispensing containers face issues with liquid leakage due to slight vertical movements of the nozzle head during transportation or use, and require excessive force to dispense liquid when the nozzle head is lowered from its highest position.
Innovation Solution
The pump-dispensing container features a primary check valve that opens when the liquid chamber is filled, reducing resistance and allowing easy dispensing by applying a small force, with a ball valve made of a resin with a specific gravity less than 1.00 and a tubular engagement portion that moves up and down with the nozzle head, preventing immediate opening of the secondary check valve during slight movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the secondary check valve is configured to open immediately when the nozzle head is pressed down, then the liquid can be discharged quickly, but slight vertical movements of the nozzle head during transportation cause unintentional leakage
Solution Approach 1:
The patent changes the parameter of spring compression state by allowing the tubular engagement portion to move relative to the liquid cylinder, delaying spring compression until the nozzle head reaches a predetermined position. This prevents the secondary check valve from opening during slight movements while enabling quick discharge when intentionally pressed.
Solution Approach 2:
The tubular engagement portion acts as an intermediary mechanism between the nozzle head and the spring. It absorbs slight vertical movements without transmitting them to the spring, thereby preventing unintended valve opening while allowing intentional discharge when the movement exceeds the absorption range.
2Ease of operation
If the nozzle head is brought up further from the top dead point, then the spring can be compressed less, but a large force is needed at the beginning to push out the liquid
Solution Approach 1:
The patent implements preliminary action by pre-positioning the tubular engagement portion and configuring the spring to engage at a predetermined point during downward movement. This allows the system to accumulate potential energy gradually rather than requiring sudden high force, making operation easier while maintaining adequate spring compression for liquid discharge.
3Device complexity
If the tubular engagement portion is fixed relative to the liquid cylinder, then the structure is simpler, but the secondary check valve opens immediately causing leakage during transportation
Solution Approach 1:
The patent applies dynamics by making the tubular engagement portion movable relative to the liquid cylinder rather than fixed. This dynamic configuration allows the structure to adapt to different states: during transportation, it absorbs vibrations to prevent leakage; during use, it allows sufficient compression for proper valve operation, all while maintaining relatively simple construction.
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 configuration allows for easy dispensing of liquid with reduced resistance when pressing down on the nozzle head, preventing leakage and making it simpler to control the amount of liquid dispensed by adjusting the nozzle head's movement.
Implementation Method 1
a ball valve made of a resin with a specific gravity less than 1.00... in a state in which the liquid chamber is filled with a liquid and the nozzle head is raised to its highest position
Data Source
Figure 1
Figure 2(a)~2(e)
Figure 3(a)~3(e)
AI summary
Provided is a pump-type discharge container that has a specific structure for preventing leakage of a liquid due to slight up-and-down motion of a nozzle, wherein when a nozzle head is initially depressed from a state in which the nozzle head is in its highest position, the ease of liquid discharge is improved. The container is configured so that, in a state in which a liquid chamber is filled with the liquid and the nozzle head is raised up as far upward as possible, a primary check valve opens communication between the liquid chamber and the main body of the container, and as a result, when the nozzle head is depressed to discharge the liquid from a state in which the nozzle head is raised up to its highest position, resistance to depressing of the nozzle head can be markedly reduced and the liquid can be easily discharged with a small amount of force because communication between the liquid chamber and the main body of the container has been opened.