Pressure Washer Gun Safety Lock Mechanism
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Solution Overview
Problem
Pressure washers often unintentionally discharge high-pressure fluid due to accidental trigger actuation, posing safety risks and inefficiencies.
Innovation Solution
A safety lock mechanism is integrated into the pressure washer gun, pivotally coupled with the hand grip, which can move between a locked and unlocked position, biased towards the locked position to prevent unintended actuation, requiring affirmative user action to unlock and allow fluid discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a trigger mechanism is provided for controlling fluid discharge, then ease of operation is improved, but unintentional actuation occurs causing safety risks
Solution Approach 1:
The safety lock is positioned to engage with the trigger mechanism before the trigger can be actuated. The lock must be manually disengaged first, creating a preliminary action step that prevents unintentional discharge while maintaining ease of operation when deliberately activated
Solution Approach 2:
The safety lock acts as an intermediary mechanical element between the user's hand and the trigger mechanism. It mediates the actuation process by requiring deliberate engagement/disengagement actions, thereby preventing accidental trigger activation while preserving operational ease when intentionally used
2Object-affected harmful factors
If a safety lock mechanism is added to prevent unintentional actuation, then safety is improved, but device complexity increases
Solution Approach 1:
The safety lock mechanism is merged with the existing trigger assembly and housing structure. The lock integrates with the grip portion and works in conjunction with the trigger linkage, combining multiple functions into a unified mechanism that prevents unintentional discharge without adding excessive complexity
Solution Approach 2:
The safety lock serves multiple functions: it prevents unintentional trigger actuation, provides a visual indicator of locked status, and integrates with the existing trigger mechanism. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while improving safety
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 safety lock significantly reduces the likelihood of unintentional discharge of high-pressure fluid, enhancing user safety and operational control by ensuring deliberate actuation of the trigger.
Implementation Method 1
The safety lock may be biased toward the locked position by a torsion spring.
Data Source
AI summary
A pressure washer gun is provided including a safety locking feature that may inhibit unintentional actuation. In an embodiment, the pressure washer gun may include a body portion, and a hand grip portion extending from the body portion. A trigger may be disposed adjacent to the hand grip portion and coupled with a flow control valve for controlling the flow of high pressure fluid through the pressure washer gun. A safety lock may be pivotally coupled with the hand grip portion for movement between a locked position inhibiting movement of the trigger to open the flow control valve, and an unlocked position allowing movement of the trigger to open the flow control valve, the safety lock being biased toward the locked position.