Spray Gun Pressure Display via Inclined Axis Mechanism
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Solution Overview
Problem
Existing spray guns for high-pressure cleaning devices are costly to produce and difficult to handle due to the alignment requirements for pressure detection and display, which can hinder ergonomic and efficient pressure reading.
Innovation Solution
A mechanical pressure detection and display device where the display part moves linearly along an inclined axis relative to the thrust axis, allowing for easier alignment within the spray gun and enabling ergonomic pressure reading without changing the gun's orientation, with a transparent cover for clear visibility and scale/symbols for optimal cleaning object selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an electrical pressure indication device powered by a battery is used, then pressure can be displayed to the user, but the manufacture and installation costs increase considerably
Solution Approach 1:
The patent replaces the electrical pressure indication device with a purely mechanical pressure sensing and display device. The mechanical device uses a piston that moves in response to pressure changes, coupled to a display element that rotates to indicate pressure levels, eliminating the need for batteries, electrical components, and complex installation while providing reliable pressure indication
Solution Approach 2:
The mechanical pressure display device is self-powered by the pressure of the cleaning fluid itself. The piston is pressurized by the cleaning fluid and uses this pressure to drive the display mechanism, requiring no external power source or additional energy input, thereby reducing manufacturing and installation costs
2Device complexity
If the display element is aligned coaxially with the piston's longitudinal axis, then the pressure sensing mechanism is simple, but handling the spray gun becomes difficult as the user must change the gun's orientation to read the pressure
Solution Approach 1:
The patent introduces a dimensional transformation by coupling the piston's linear motion along its longitudinal axis to the display element's rotation about a rotary axis. This converts the pressure indication from a linear displacement that requires axial viewing to a rotational display that can be read from the side, allowing the display axis to be perpendicular to the piston axis and improving ergonomics
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 solution allows for cost-effective production and improved handling by enabling straightforward pressure detection and ergonomic display of cleaning liquid pressure, facilitating intuitive selection of suitable cleaning pressures for different objects without altering the spray gun's orientation.
Implementation Method 1
A push element which is linearly movable along a push axis depending on the pressure of the cleaning fluid prevailing in the flow path between the liquid inlet and the liquid outlet
Implementation Method 2
a display element which can be moved linearly along a display axis by means of the push element, the display axis being inclined to the push axis
Data Source
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AI summary
The invention relates to a spray gun (10) for a high-pressure cleaning device comprising a liquid inlet (38), a liquid outlet (24), a valve (26), which is positioned in the flow path between the liquid inlet (38) and the liquid outlet (24) and can be actuated by means of an actuating element, and comprising a pressure detection- and display device (68) having a thrust part (84), which can be moved along a thrust axis (94) depending on the prevailing pressure of a cleaning liquid in the flow path between the liquid inlet (38) and the liquid outlet (24), and having a display part (100), which is mechanically coupled to the thrust part (84) and which can be moved into varying positions with the help of the thrust part (84). In order to develop the spray gun (10) such that it is cost-effective to produce and has improved handling characteristics by displaying the pressure to the user in an ergonomically advantageous way, according to the invention the display part (100) can be moved along a display axis (102) with the help of the thrust part (84), the display axis (102) being angled in relation to the thrust axis (94) and defining a plane (114) together with the thrust axis (94).