Check Valve Cushioning Bag Sealing Against Internal Leakage
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Solution Overview
Problem
Existing cushioning members used for packing objects suffer from internal leakage when the non-return valve is damaged or excessive pressure is applied, leading to a reduction in their cushioning function.
Innovation Solution
A cushioning member composed of resin sheets fused in the form of a bag, featuring check valves with a third fusing portion that seals the channel and prevents medium flow between accommodating bag portions, ensuring the cushioning function is maintained even under external pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-return valve is used to prevent medium leakage, then the cushioning function is improved, but when the valve is damaged or excessive pressure is applied, internal leakage occurs and the cushioning function deteriorates
Solution Approach 1:
The invention performs preliminary sealing by providing a sealing portion that seals the introducing portion before medium introduction. This sealing portion is disposed in the introducing portion upstream of the non-return valve and seals the introducing portion after medium is accommodated in the medium accommodating portion, preventing internal leakage before it can occur.
Solution Approach 2:
The invention introduces a sealing portion as an intermediary element between the introducing portion and the non-return valve. This sealing portion acts as a backup barrier that prevents medium leakage through the introducing portion even when the non-return valve fails or is subjected to excessive pressure.
2Reliability
If a sealing region is provided upstream of the non-return valve, then medium leakage is prevented, but the device complexity increases
Solution Approach 1:
The invention merges the sealing function with the introducing portion by providing a sealing portion that is integrated into the introducing portion structure. This sealing portion is formed as part of the cushioning member itself, combining multiple functions into a single component and avoiding the need for separate sealing devices.
Solution Approach 2:
The sealing portion is formed from the cushioning member material itself, allowing the cushioning member to provide its own sealing function without requiring external sealing components. The sealing portion is created through the same molding process that forms the cushioning member, enabling self-sealing capability.
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 effectively prevents internal leakage and maintains the cushioning function by sealing the check valve channel and preventing medium movement between bag portions, even when external forces are applied, thus enhancing the packing performance.
Implementation Method 1
composed of at least one resin sheet fused in the form of a bag
Implementation Method 2
a check valve having a first end and a second end and provided at the opening such that the first end is located inside the accommodating bag portion and the second end is located outside the accommodating bag portion
Implementation Method 3
a third fusing portion that is connected to the second fusing portion and seals the channel. The third fusing portion is provided across a portion of the check valve that protrudes from the accommodating bag portion
Data Source
AI summary
A cushioning member includes: an accommodating bag portion that accommodates a medium; a first fusing portion that defines the accommodating bag portion such that the accommodating bag portion is provided with an opening; a check valve having a first end located inside the accommodating bag portion and a second end located outside the accommodating bag portion, and provided at the opening; a second fusing portion that is immediately adjacent to the first fusing portion on those external sides of the check valve which are opposite in a direction intersecting a direction in which the check valve protrudes from the accommodating bag portion, and defines a channel that communicates with the opening; and a third fusing portion that is connected to the second fusing portion and seals the channel, the third fusing portion being provided across a portion of the check valve that protrudes from the accommodating bag portion.