Spray Gun Nozzle Assembly Alignment and Feedback Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional spray guns face installation issues due to misalignment of the air cap and back board, leading to power loss and high temperature, as well as lack of user feedback on the correct rotation angle, resulting in inefficient atomization and potential turbulence.
Innovation Solution
A nozzle assembly with a hollow cylindrical part, a piston rod, and a back board with resilient members that ensure proper contact between the air cap and back board, along with protrusions and notches for user feedback on rotation angle, allowing for correct positioning and efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the locking member is used to position the air cap and back board, then the assembly is simple, but misalignment occurs leading to large gaps and reduced back pressure
Solution Approach 1:
The patent introduces a positioning mechanism with protrusions on the air cap and corresponding notches on the back board as an intermediary element between the locking member and the components being positioned. This positioning mechanism ensures precise alignment and correct positioning of the air cap and back board, eliminating the misalignment problems caused by the simple locking member alone.
2Device complexity
If the air cap is rotated without positioning feedback, then the structure is simple, but the user cannot determine the correct rotation angle leading to inefficient atomization
Solution Approach 1:
The patent implements a feedback mechanism through the positioning structure consisting of protrusions on the air cap and notches on the back board. When the air cap is rotated, the engagement between these positioning elements provides tactile and visual feedback to the user, clearly indicating the correct rotation angle. This eliminates the trial-and-error method and ensures efficient atomization.
3Manufacturing precision
If resilient members are added to ensure contact between back board and air cap, then alignment precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the positioning function into two independent parts: the positioning mechanism (protrusions and notches) for alignment, and the resilient members for ensuring contact. This segmentation allows each component to perform its specific function effectively without interfering with the other, achieving precise contact while maintaining reasonable device complexity.
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
Ensures proper alignment and contact between the air cap and back board, reducing power loss and temperature, and providing clear user feedback for optimal atomization and spray pattern selection, enhancing operational efficiency.
Implementation Method 1
Multiple resilient members are located on the back face of the air cap and push the back board to contact the air cap
Data Source
AI summary
A spray gun includes a nozzle connected to the open end of the spray gun and an air cap having a central passage through which the nozzle extends. The air cap includes symmetrical angular passages and multiple air passages. A back board is located at the back face of the air cap and includes an air outlet portion which includes a central hole and multiple air passages which are independent from the central hole. The nozzle extends through the central hole. Multiple resilient members are located on the back face of the air cap and push the back board to contact the air cap constantly. The air cap includes protrusion on the back face and the back board includes notches in its front face so that when rotating the air cap relative to the back board, the user is acknowledged the angle that the air cap is rotated.