Spray Gun Buckle Mechanism for One-Handed Locking
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Solution Overview
Problem
Conventional spray guns require two-handed operation for nonstop spraying and stopping, making them inconvenient for users, as they need to continuously press the handle or use both hands to engage and disengage the lock catch.
Innovation Solution
A spray gun design featuring a buckle with roll-over stands, a buckle head, inclined shoulder, and buckle tail, allowing one-handed operation through swinging the gun to open or lock the fluid passageway, reducing the number of parts and improving convenience and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a lock catch with a triangular ring and rotating shaft is used for nonstop spray, then the spray gun can be locked for continuous operation, but it requires two-handed operation which increases operational complexity
Solution Approach 1:
The invention extracts the locking function from a complex multi-component lock catch mechanism and implements it through a simple buckle that rotates to engage with a buckling position on the handle. This simplification reduces the number of parts and makes the locking operation achievable with one hand, directly resolving the contradiction between continuous spray capability and operational simplicity
Solution Approach 2:
Instead of using a complex lock catch that requires manual manipulation of multiple components, the invention inverts the approach by using a buckle that naturally rotates and locks into position through its own weight and geometry. The buckle head engages with the buckling position automatically when rotated, eliminating the need for intricate manual manipulation required by conventional lock catches
2Reliability
If a conventional lock catch mechanism is used, then locking function is provided, but the number of parts increases leading to higher cost and reduced reliability
Solution Approach 1:
The invention extracts only the essential locking function from the conventional lock catch mechanism, implementing it through a single buckle component that rotates to engage with the handle. This extraction eliminates unnecessary parts while maintaining reliable locking functionality, directly addressing the contradiction between reliability and device complexity
Solution Approach 2:
The buckle serves multiple functions: it acts as both the locking mechanism and the operational component for engaging and disengaging the lock. The same buckle that locks the spray gun also rotates to release it, eliminating the need for separate components and reducing overall device complexity while maintaining reliable locking
Data Source
AI summary
A spray gun, including a gun body, a handle attached to the gun body, a fluid passageway, a handle switch, and a buckle. The fluid passageway is disposed in the gun body and the handle. The handle switch is movably disposed on the handle by a rivet for opening and shutting the fluid passageway. The buckle is movably disposed on the handle via a switch shaft. The spray gun employs the buckle as a locking mechanism that has fewer parts, and therefore costs are reduced and convenience, reliability, and durability improved. The spray gun can be operated with one hand only by swinging it once to open and swinging it again to close. As a result, the performance and quality of the spray gun are improved.