Dual-shaft built-in pump for inflatable products
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Solution Overview
Problem
Existing built-in pumps for inflatable products require complex duct structures and high costs due to the need for a movable valve to switch airflow direction for inflation and deflation, complicating processing and assembly.
Innovation Solution
A dual-shaft built-in pump design with an inner cavity containing both air inlet and outlet, a dual-shaft motor, and separate fan blades for inflation and deflation, allowing for simplified duct structure and assembly by using rotating members to open either the inlet or outlet valve, eliminating the need for duct switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a movable valve is configured to switch airflow direction for inflation and deflation, then the pump can achieve bidirectional airflow control, but the duct structure becomes complicated and processing becomes difficult
Solution Approach 1:
The patent divides the single airflow path into two separate airflow paths: one for inflation and one for deflation. Each path has its own fixed duct structure and valve, eliminating the need for a movable valve to switch between paths. The inflation duct connects the inflation port to the motor cavity, while the deflation duct connects the deflation port to the motor cavity, allowing simultaneous existence of both paths without complex switching mechanisms.
Solution Approach 2:
The motor cavity serves multiple functions: it acts as both the inflation chamber and deflation chamber. The same motor cavity receives airflow during inflation and expels airflow during deflation, eliminating the need for separate chambers or complex duct switching. This multi-functional use of the motor cavity simplifies the overall duct structure while maintaining bidirectional airflow capability.
2Adaptability or versatility
If a movable valve is configured to switch between inflation and deflation ducts, then airflow direction can be changed, but processing and assembly become more difficult and costly
Solution Approach 1:
The patent separates the inflation and deflation functions into distinct duct paths with fixed valves, eliminating the need for a complex movable valve mechanism. Each duct is independently designed and assembled, making them easier to manufacture and install without requiring precise alignment of moving parts.
Solution Approach 2:
Instead of using a single duct with a movable valve to switch airflow direction, the patent inverts the approach by using two fixed ducts that operate simultaneously but independently. The inversion of the switching mechanism into separate fixed paths simplifies the manufacturing process and reduces assembly complexity.
3Adaptability or versatility
If separate fan blades are used for inflation and deflation in a dual-shaft motor, then airflow can be directed to either inlet or outlet, but the motor structure becomes more complex
Solution Approach 1:
The motor is divided into two independent shafts, each with its own fan blade assembly. The first shaft drives the first fan blade for inflation, while the second shaft drives the second fan blade for deflation. This segmentation allows each fan blade to be optimized for its specific function while maintaining independent control, simplifying the overall control structure despite the dual-shaft configuration.
Solution Approach 2:
The patent combines the inflation and deflation motor functions into a single dual-shaft motor unit. Both shafts are housed within the same motor casing and share common mounting structures, allowing the motor to occupy a compact space while providing both inflation and deflation capabilities through integrated design.
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 dual-shaft design simplifies the air duct structure, reduces processing complexity and costs, and facilitates convenient assembly by allowing airflow to be directed through either the inlet or outlet without switching ducts, enhancing the efficiency and cost-effectiveness of the pump.
Implementation Method 1
a first fan blade, located between the air inflation vent and the air inlet; a second fan blade, located between the air deflation vent and the air outlet; a dual-shaft motor, configured in the accommodating cavity and having an output shaft which has an end connected with the first fan blade and another end connected with the second fan blade
Implementation Method 2
a rotating member, rotatably provided on the main body and configured to drive either of the two valve bodies thereby opening the air inlet or the air outlet
Data Source
AI summary
A dual-shaft built-in pump includes a main body, provided with an air inlet and an air outlet; a motor cover, provided with an accommodating cavity having an air inflation vent and an air deflation vent; two valve bodies; a first fan blade, located between the air inflation vent and the air inlet; a second fan blade, located between the air deflation vent and the air outlet; a dual-shaft motor, configured in the accommodating cavity and having an output shaft connected with the first fan blade and the second fan blade; and a rotating member, rotatably provided on the main body and configured to drive either of the two valve bodies thereby opening the air inlet or the air outlet. The pump has simple structure, convenient fabrication and low cost.