Wearable Spraying Device Hand Lever Integration
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Solution Overview
Problem
Existing portable spray devices often have a pressure vessel and pump arrangement that is not compact, leading to inefficiencies in operation and maintenance, and hoses can be cumbersome, causing issues with usability and storage.
Innovation Solution
The integration of the pressure vessel and pump into the hand lever forms a compact unit, with a hollow piston rod for suction and a bellows for sealing, allowing for easier maintenance and a more ergonomic design that reduces hose length and improves usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the pressure vessel and pump are arranged separately in conventional portable spray devices, then the device structure is simple and easy to manufacture, but the device occupies more space, the hose becomes longer and more cumbersome, and maintenance becomes more difficult
Solution Approach 1:
The patent merges the pressure vessel and pump into a single integrated unit that forms part of the hand lever assembly. The pressure vessel is positioned within the hand lever structure, and the pump is integrated with the cavity of the hand lever, creating a compact combined unit that reduces overall device volume while maintaining functional simplicity
Solution Approach 2:
The patent implements a nested arrangement where the pressure vessel is positioned within the hand lever structure, and the pump components (pump cylinder, piston, non-return valve) are integrated within the cavity of the hand lever. This nesting approach allows multiple functional components to occupy overlapping spatial volumes, thereby reducing the overall device footprint without increasing structural complexity
2Length of moving object
If the hose is made longer to reach from the tank to the spray nozzle, then the spray coverage area is increased, but the hose becomes more cumbersome and difficult to store
Solution Approach 1:
By integrating the pressure vessel and pump into the hand lever assembly, the patent effectively relocates the spray generation function closer to the user's hand. This allows the hose to start from the hand lever rather than extending the full length from the tank, reducing hose length and improving storability while maintaining adequate spray coverage through the concentrated pressure generation at the hand lever
3Ease of repair
If the pump and pressure vessel are integrated into the hand lever, then maintenance becomes easier and device compactness is improved, but the integration complexity during manufacturing increases
Solution Approach 1:
The patent segments the integrated hand lever assembly into distinct functional modules: the hand lever body with cavity, the pressure vessel as a separate insertable component, the pump components (pump cylinder, piston, non-return valve) as modular elements, and the connecting piece for the hose. This segmentation allows each module to be manufactured separately using standard processes and then assembled through straightforward connection mechanisms, reducing overall manufacturing complexity despite the 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
This design enhances operational efficiency, simplifies maintenance, and provides a more comfortable and flexible usage experience by reducing hose length and allowing for easier storage.
Implementation Method 1
a bellows for static sealing to the outside, which is fixed to the opening of the cavity by means of the closing device
Implementation Method 2
the piston rod is hollow and as such forms a suction line for the liquid from the tank into the pump cylinder
Implementation Method 3
the pump has a non-return valve as a non-return valve, which opens and closes due to the pressure difference between the pressure container and the pump
Data Source
Figure 1
Figure 2a
Figure 2b~2c
AI summary
The invention relates to a spraying device for dispensing liquids that can be worn on the back, which has a tank (2), a hand lever (4), a pump (12), and a pressure vessel, wherein the pressure vessel is formed by a cavity in the hand lever (4) and the pump (12) is arranged in the cavity. The piston rod (13) of the pump is rotatably connected to a lever element (15) of the hand lever. A connection port (16) for a hose having a spray nozzle is integrated in the hand lever. The compact design of the spraying device enables a larger tank volume and more comfortable use. The spraying device can be economically produced, because the number of components is small.