Dual-Purpose Valve Cap with Rotating Switch Mechanism
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Solution Overview
Problem
Conventional dual-purpose valve caps for Schrader and Presta valves are complex, large, and prone to disconnection during inflation operations.
Innovation Solution
A compact dual-purpose valve cap design featuring a rotating device with screw holes for both valve types, sealed by O-shaped rings and a ball mechanism that ensures secure connection and air passage switching, preventing accidental disconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional dual-purpose valve caps use parallel American and French valves with a lever and rubber socket mechanism, then both valve types can be accommodated, but the structure becomes complicated and size increases
Solution Approach 1:
The rotating device integrates both American and French valve functions into a single unified structure. The rod-like body can rotate to present different valve connection interfaces (screw holes for Presta valve, bayonet connection for Schrader valve) sequentially, eliminating the need for separate parallel valve mechanisms and reducing overall structural complexity while maintaining dual-purpose compatibility
2Ease of operation
If conventional dual-purpose valve caps use a lever and rubber socket mechanism, then valve connection is achieved, but the device requires large operation space
Solution Approach 1:
The invention replaces the static lever-and-socket mechanism with a dynamic rotating device. The rod-like body rotates within the casing to switch between different valve connection modes, eliminating the need for a large external lever and rubber socket assembly. This dynamic rotation mechanism significantly reduces the operation space required while maintaining ease of use through simple rotational motion
3Ease of operation
If conventional dual-purpose valve caps use a rubber socket mechanism, then valve connection is achieved, but accidental disconnection occurs during inflation
Solution Approach 1:
The invention employs a ball mechanism with semispherical recesses to create secure valve connections. The spherical ball fits into precisely shaped recesses that provide mechanical interlocking, preventing accidental disconnection during inflation operations. This curved, interlocking geometry offers superior connection stability compared to the linear rubber socket mechanism
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 provides a stable, compact, and easy-to-use solution that ensures secure valve connections, even in low-light conditions, with reduced operational space requirements and minimized risk of disconnection.
Implementation Method 1
two O-shaped seal rings respectively mounted on the rod-like body of the rotating device at two sides relative to the annular groove to seal the annular air passage
Implementation Method 2
a ball accommodated in the accommodation chamber; wherein two semispherical recesses respectively formed on an inside wall of the accommodation chamber at the connection area between the accommodation chamber and through hole of each of the two heads
Implementation Method 3
the screw hole of one head being adapted for receiving a Presta valve
Data Source
AI summary
A Schrader (American) valve/Presta (French) valve dual-purpose valve cap includes a casing comprising an axle hole, an end portion, and a through hole; a rotating device comprising a rod-like body and two heads, each head having a screw hole, the screw hole of one head being adapted for receiving a Presta valve, the screw hole of the other head being adapted for receiving a Schrader valve, the rod-like body comprising an accommodation chamber, two through holes and an annular groove, the annular groove defining an annular air passage, the rod-like body defining a through hole; two O-shaped seal rings sealed the annular air passage; and a ball accommodated in the accommodation chamber; wherein two semispherical recesses respectively formed on an inside wall of the accommodation chamber; the ball has a radius smaller than the radius of the semispherical recesses and greater than the radius of the through hole of each of the two heads.