Inflation Pump Integral Head Cylinder Check Ring Design
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Solution Overview
Problem
Existing inflation pumps face challenges with reverse air leakage due to insufficient precision in assembly, requiring complex one-way valve systems and precise threading connections, which complicates the assembly process and can lead to leaks.
Innovation Solution
An inflation pump design featuring a body with an integrally formed cylinder and head, incorporating a check ring and airtight ring system that allows air flow only in one direction, along with a lever and compression spring mechanism for secure sealing, simplifying assembly and preventing leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a one-way valve is mounted between the head and cylinder using threading connection, then reverse air flow can be prevented, but assembly precision requirements increase and leakage risks arise
Solution Approach 1:
The head and cylinder are integrated into a single integral structure, eliminating the need for separate one-way valve components and threading connections. This merging of parts removes the precision requirements and leakage risks associated with multiple assembled components while maintaining the air flow control function through the integral design.
Solution Approach 2:
The separate one-way valve component is extracted and eliminated from the design. Instead of using a distinct valve that requires threading and assembly, the air flow control function is integrated directly into the head-cylinder structure, removing the precision assembly requirements.
2Reliability
If a separate one-way valve system is used, then air flow control is achieved, but device complexity increases
Solution Approach 1:
Multiple functions (head, cylinder, and air flow control) are merged into a single integral structure. This reduces the number of separate parts and simplifies the device while maintaining reliable air flow control through the integrated design.
Solution Approach 2:
The integral head-cylinder structure performs multiple functions simultaneously: it serves as both the structural housing and the air flow control mechanism. This multi-functionality reduces device complexity by eliminating the need for separate dedicated components.
3Reliability
If threading connection is used for mounting the one-way valve, then the valve can be secured, but assembly difficulty increases due to precision requirements
Solution Approach 1:
The head and cylinder are combined into an integral structure, eliminating threading connections and complex assembly processes. The secure mounting is achieved through the integral design itself, making assembly trivial compared to precision threading operations.
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 reverse air leakage, ensures easy and precise assembly, and maintains an airtight state during inflation, reducing the risk of damage from high-pressure air and allowing for cost-effective production with fewer parts.
Implementation Method 1
The check ring includes an inner side abutting against the push seat. The check ring includes an outer side radially outwards of the inner side and abutting against a portion of an inner periphery of the through-hole
Implementation Method 2
A compression spring and a tappet which are received in the receiving hole
Data Source
AI summary
An inflation pump including a body having a cylinder and a head integrally formed with the cylinder. The cylinder includes a pressurizing space. The head includes a through-hole extending along a longitudinal axis. An intercommunication passage is disposed between and intercommunicates with the through-hole and the pressurizing space. A pressurizing unit is slidably received in the pressurizing space and is reciprocally slidable relative to the body. A nozzle unit includes a pressing device disposed in the through-hole. The pressing device includes a push seat having a check ring. The check ring includes an inner side abutting against the push seat and an outer side abutting against a portion of an inner periphery of the through-hole. The portion of the inner periphery of the through-hole is located between the intercommunication passage and the coupling end. The check ring permits air to flow only from the intercommunication passage towards the coupling end.