Ergonomic Joystick Control for Portable Sprayers
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Solution Overview
Problem
Current joystick controls for portable air-assisted sprayers lack complete integration of main functions such as acceleration/deceleration, liquid/spray outlet control, and deactivation/blocking mechanisms, leading to potential accidental operations and inadequate safety features, especially for operators and bystanders.
Innovation Solution
A joystick-type control system with ergonomic design integrating acceleration, deceleration, motor start/stop, liquid flow control, and safety lock functions, featuring a throttle trigger, switch button, and safety lock mechanism that requires three independent actions to activate spraying, ensuring accidental prevention and easy maintenance, with components designed for user-friendly operation and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple control functions are integrated into a single joystick device, then operator safety and ease of operation are improved, but device complexity increases
Solution Approach 1:
The patent combines multiple control functions (throttle control, spray outlet control, motor start/stop, and safety lock) into a single integrated joystick device. This merging of functions allows the operator to control all aspects of the sprayer from one location, improving safety by eliminating the need to reach for separate controls and reducing the risk of accidental operations through interlinked control mechanisms.
Solution Approach 2:
The joystick serves as a universal control device that performs multiple functions simultaneously. It acts as both a throttle control and a spray control mechanism, while also incorporating safety lock and motor control capabilities. This multi-functionality reduces the number of separate controls needed and simplifies the overall control system architecture.
2Ease of operation
If control functions are positioned close to the spray outlet pipe, then ease of operation is improved, but risk of accidental activation increases
Solution Approach 1:
The safety lock mechanism is designed to prevent accidental activation before it can occur. The interlinking between the throttle trigger and spray outlet control ensures that the spray cannot be activated unless the throttle is already in the on position, creating a preliminary barrier against unintended spray release. This anti-action mechanism proactively eliminates the hazard of accidental activation.
Solution Approach 2:
The integrated joystick acts as an intermediary control device that mediates between the operator's intent and the actual spray activation. By requiring coordinated movement of multiple control elements within the joystick (throttle trigger and spray outlet control), it introduces an intermediate step that prevents direct, accidental activation of the spray function.
3Reliability
If control components require periodic cleaning and maintenance, then operational reliability is improved, but ease of maintenance worsens
Solution Approach 1:
The control components requiring maintenance (filter and liquid valve) are segmented as separate, removable elements within the joystick assembly. This segmentation allows these components to be independently accessed and removed for cleaning and maintenance without disassembling the entire joystick device, thereby maintaining operational reliability while improving ease of maintenance.
Data Source
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AI summary
The present invention refers to a 'joystick' type control, for coupling to portable motorized sprayers with air assistance - as a rule, knapsack sprayers - , which integrates and enables the manual operation of the main machine control functions: acceleration/deceleration, activation of the electric circuit allowing the manual starting (via start-up) of the motor, interruption of motor operation ('stop'), opening and closing of the liquid/spray flow and safety lock (to prevent accidental acceleration, as well as to slow down the equipment and blocking the release of liquid to release/drop the hand of command position). Such a control is designed to be positioned in front of the operator in the equipment discharge/air outlet pipe, so that all the functions described above can be operated in the operating position of the machine by an operator wearing gloves. Buttons, triggers, and components that may require periodic cleaning and maintenance are designed and arranged so that their function(s), operating direction(s), operating mode(s) and removal (cleaning and maintenance), are obvious and simple to the user. In addition, the design of the grip (2) - shape, dimensions and position/inclination - has ergonomic characteristics in order to be able to work for long hours.