Rotatable Trigger Guard Spray Gun for Tool-Free Maintenance
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Solution Overview
Problem
Spray guns used for applying paints and coatings often require frequent maintenance due to wear from high-pressure fluids, and there is a need for enhanced field serviceability to minimize project disruptions.
Innovation Solution
The design includes a spray gun with a gun body, a handle, a fitting for fluid supply, and a trigger guard that is rotatable relative to the handle, allowing for torque to be exerted on the handle to disconnect and reconnect it from the gun body, facilitating easy maintenance and filter replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spray gun components are designed for high-pressure fluid handling, then reliability is improved, but ease of repair deteriorates due to frequent wear and maintenance requirements
Solution Approach 1:
The spray gun is divided into separable components including the handle, gun body, and trigger guard assembly. The trigger guard can be detached from the handle to provide access to internal components such as filters and seals, enabling easy maintenance while maintaining structural integrity during operation.
Solution Approach 2:
The trigger guard is designed as a removable component that can be taken out from the handle assembly. This extraction allows direct access to internally located maintenance components without disassembling the entire spray gun, significantly improving serviceability while preserving component durability.
2Ease of repair
If the trigger guard is made rotatable relative to the handle, then ease of repair is improved, but device complexity increases
Solution Approach 1:
The trigger guard is designed with rotational movement capability relative to the handle, transitioning from a static to a dynamic configuration. This dynamic feature allows the trigger guard to rotate into different positions, providing access to internal components while maintaining a simple overall structure without complex mechanisms.
Data Source
AI summary
A spray gun includes a gun body and a handle removably connected to the gun body. A filter is disposed in the handle for filtering particulate from the spray fluid. A trigger guard is connected to the handle and gun body and includes a contour on a lower portion of the trigger guard for receiving one or more fingers of the user that are not interfacing with and contacting the trigger. The trigger guard can be disconnected from the gun body and rotated relative to the handle. The trigger guard can contact a portion of the handle and exert torque on the handle to connect the handle to and disconnect the handle from the gun body. The portion of the handle at least partially covers a fitting connecting to the handle to provide spray fluid to the spray gun.