Trigger Support Mechanism for Liquid Applicator Fatigue Reduction
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Solution Overview
Problem
Conventional paint applicators require significant and constant pressure to maintain fluid flow, leading to user fatigue due to increased force needed in fully actuated positions, which can cause discomfort and reduce operational duration.
Innovation Solution
A mechanical detent mechanism is introduced to reduce the pressure required to maintain the trigger in an actuated position, allowing the user to release their finger while keeping the fluid channel open, and automatically return to a closed position when pressure is released, thereby alleviating the need for continuous hand pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant pressure is applied to maintain trigger in actuated position, then fluid flow is maintained, but user fatigue increases
Solution Approach 1:
The trigger mechanism is designed to maintain fluid flow automatically once actuated, without requiring continuous user pressure. The trigger support structure provides mechanical assistance to hold the trigger in the actuated position, allowing the system to serve itself by maintaining flow state without constant human intervention.
Solution Approach 2:
A trigger support structure acts as an intermediary between the user's initial trigger pull and the continuous fluid flow requirement. This intermediary mechanical structure absorbs the burden of maintaining trigger position, transferring the load from the user's finger to the support structure, thereby enabling reliable flow maintenance while reducing user fatigue.
2Productivity
If significant pressure is required to maintain trigger actuated, then fluid flow control is achieved, but operational duration is reduced
Solution Approach 1:
The trigger support structure enables the system to maintain fluid flow control automatically after initial actuation. By providing mechanical support to hold the trigger position, the system sustains its fluid control function over extended periods without requiring continuous user effort, thereby extending operational duration while preserving flow control capability.
3Reliability
If trigger requires constant hand pressure, then fluid discharge control is precise, but user discomfort increases
Solution Approach 1:
The trigger support structure serves as a mediator that takes over the burden of maintaining trigger position. This intermediary mechanical support preserves precise fluid discharge control by ensuring stable trigger positioning while eliminating the harmful effect of continuous hand pressure, thereby reducing user discomfort during extended operation.
Data Source
AI summary
A fluid applicator configured to reduce user fatigue is presented. The applicator comprises an inlet and an outlet fluidically coupled by a fluid path. The applicator also comprises a trigger. The trigger is configured to, when actuated, move between a closed position and an open position. The open position comprises a fluid flowing from the inlet, to the outlet, along the fluid path. The applicator also comprises a trigger support configured to reduce a pressure required to maintain the trigger in an open position. The trigger support is configured to reduce the pressure required as the trigger actuates between the closed position and the open position.