Flat Tire Repair Liquid Container With Protrusion Plug
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Solution Overview
Problem
Existing flat tire repair liquid containers face issues with flow path opening problems due to rubber closing plugs deforming under air pressure, causing them to become stuck and block the flow path during use.
Innovation Solution
A flat tire repair liquid container design featuring a cylindrical flow path with a small diameter portion at one end, where the closing plug is positioned to open the flow path under pressure, and a protrusion on the plug to prevent sticking, ensuring reliable movement and flow path opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rubber closing plug is used in the flow path to prevent liquid leakage during storage, then sealing performance is improved, but the closing plug deforms under air pressure during use and becomes stuck, blocking the flow path
Solution Approach 1:
The closing plug is designed with different local properties: a protrusion portion with larger diameter than the cylinder portion, creating varying sealing characteristics along the plug. The protrusion provides enhanced sealing at its location while the narrower cylinder portion allows controlled movement under pressure without deformation-induced blocking.
Solution Approach 2:
The closing plug's geometry is modified by adding a protrusion portion that changes the pressure distribution and movement characteristics. This structural parameter change allows the plug to maintain sealing effectiveness while enabling reliable movement under air pressure to open the flow path without becoming stuck.
2Productivity
If air pressure is supplied to open the flow path during flat tire repair work, then liquid dispensing is enabled, but the pressure causes the closing plug to deform and become stuck in the flow path
Solution Approach 1:
The protrusion portion creates a localized structural feature that interacts with the air pressure in a specific region of the flow path. This local geometric quality ensures that pressure is applied effectively to move the plug while preventing uniform deformation that would cause sticking.
Solution Approach 2:
The closing plug is designed to dynamically respond to pressure changes: remaining stationary during storage, then moving reliably when air pressure is applied during use. The protrusion-cylinder geometry combination enables this dynamic behavior by providing stable equilibrium positions at both rest and actuated states.
3Reliability
If the closing plug is positioned at the end of the first side to close the flow path, then sealing is achieved, but the plug cannot move reliably under pressure and blocks the flow path
Solution Approach 1:
The protrusion portion is strategically positioned to provide sealing at the critical closure location while its geometric relationship with the cylinder portion creates a pressure-responsive movement mechanism. This local structural differentiation enables both reliable closing and reliable opening functions.
Solution Approach 2:
The closing plug is segmented into functionally distinct portions: the protrusion portion for sealing and the cylinder portion for movement. This segmentation allows each portion to optimize its function independently while working together to resolve the contradiction between maintaining closure and enabling opening.
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 design effectively prevents flow path opening problems by concentrating air pressure and using a protrusion to maintain plug movement, ensuring efficient liquid dispensing without blockages.
Implementation Method 1
the air flowing into the cylinder portion concentrates in a small area, and the pressure of the air pressing on the closing plug increases
Data Source
AI summary
Provided is a flat tire repair liquid container including: a container main body including a container body in which a flat tire repair liquid is stored, and an opening; and a cap including a flow path configured to guide the flat tire repair liquid out of the container. The flow path includes a cylinder portion of which an end of a first side is open toward internal space of the container body and in which a closing plug is slidably inserted, and a dispensing portion branching from the cylinder portion and open to outside the container. The closing plug is configured to close the flow path by being positioned at the end of the first side of the cylinder portion, and to open the flow path by being subjected to pressure inside the container during flat tire repair work and moving to a second side.