Dual-Valve Inflating Device with Movable Valve Seat
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Solution Overview
Problem
Conventional dual-purpose air valve connectors for Schrader and Presta valves are inconvenient to use and often fail to achieve a tight seal due to the gasket becoming loose, making it difficult to selectively connect and disconnect between the two valve types.
Innovation Solution
An inflating device with a valve engaging head and a pushing apparatus that includes a connection assembly with separate holes for Schrader and Presta valves, featuring a valve seat that can be driven by the pushing apparatus to ensure secure connections, using a combination of seal rings and abutting portions to maintain airtight seals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dual-purpose air valve connector with a gasket is used to connect both Schrader and Presta valves, then the device can accommodate both valve types, but the gasket easily becomes loose and cannot tightly engage with the valve
Solution Approach 1:
The connection assembly is divided into separate connection holes (first connection hole for Presta valve, second connection hole for Schrader valve) with dedicated sealing structures for each valve type. Each connection hole has its own seal ring and abutting portion configuration, eliminating the problem of a single gasket serving multiple purposes and becoming loose.
Solution Approach 2:
Different sealing structures are provided at different locations within the connection assembly. The first connection hole has a first seal ring and first abutting portion configured for Presta valves, while the second connection hole has a second seal ring and second abutting portion configured for Schrader valves. Each location has optimized local sealing quality appropriate for its specific valve type.
2Adaptability or versatility
If a lever-configured gasket is used to selectively connect Schrader and Presta valves, then the device can switch between valve types, but it is inconvenient to use and the gasket becomes loose
Solution Approach 1:
The valve seat automatically positions itself based on which valve is inserted. When a Presta valve is inserted, the valve seat moves to engage with the first abutting portion; when a Schrader valve is inserted, it engages with the second abutting portion. The system self-adjusts without requiring manual lever operation, improving ease of use.
3Device complexity
If a single gasket is used for both valve types, then the connector structure is simplified, but the gasket cannot tightly engage with either valve type
Solution Approach 1:
Multiple sealing structures are merged into a single integrated connection assembly. The first seal ring, second seal ring, valve seat, and abutting portions are all combined in one connection assembly that can accommodate both valve types with dedicated sealing for each, maintaining structural unity while providing multiple specialized sealing interfaces.
Data Source
AI summary
An inflating device includes an air pump, a valve engaging head, and a pushing apparatus disposed on the air pump and selectively engaging and disengaging the valve engaging head. The valve engaging head includes a main body, a connection assembly coupled to the main body and having a connection hole for a Presta valve and another connection hole for a Schrader valve, and a valve seat movably disposed in the main body. The connection assembly has a receiving hole and the valve seat is movably disposed in the receiving hole. The pushing apparatus selectively contacts and disengages from the connection assembly. The pushing apparatus has a pushing portion ii adapted to drive the valve seat. The pushing apparatus engaging the valve engaging head includes the pushing portion pushing the first abutting portion, thereby driving the valve seat toward the second connection hole.