Garden Tool Self-Propelled Control Panel With Intervalled Start Paddle
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Solution Overview
Problem
Existing garden tools with self-propelled drive mechanisms have complex control structures, leading to operator confusion and inconvenience, particularly due to the need to grasp multiple controls simultaneously and the risk of accidental shutdown when the push rod is released.
Innovation Solution
A garden tool with a simplified control panel featuring a main blade control assembly and self-propelled control assembly, allowing for intervalled actions within a certain time frame, including a point-touch main blade button, a pull rod with clamp return spring, and a self-propelled start paddle with speed regulation, all designed for intuitive operation and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a self-propelled drive mechanism is added to reduce operator fatigue, then the ease of operation is improved, but the device complexity increases and control structure becomes more complicated
Solution Approach 1:
The control system is segmented into distinct functional modules: a push rod assembly for self-propelled control, a blade control assembly with independent button and pull rod, and a safety interlock system. Each module operates independently with its own control mechanism, reducing overall system complexity while maintaining comprehensive functionality.
Solution Approach 2:
The safety interlock system is pre-configured to detect the position of the push rod and the state of the blade control components before allowing operation. The system checks whether the push rod is properly engaged and the blade control is in the correct position before enabling the self-propelled drive, preventing unsafe operations before they can occur.
2Adaptability or versatility
If multiple control components are integrated into the control panel, then the functionality is improved, but the ease of operation deteriorates due to operator confusion
Solution Approach 1:
Different control components are assigned distinct physical locations and operational characteristics: the push rod is positioned at the rear for one-handed operation, the main blade button is placed on the control panel with clear labeling, and the blade control pull rod is positioned for easy access. Each control element has a dedicated function and intuitive operation method, reducing cognitive load on the operator.
Solution Approach 2:
Instead of requiring the operator to manage multiple controls simultaneously, the system is designed so that the push rod controls self-propelled drive independently, while the blade control assembly with its button and pull rod manages blade operation independently. The safety interlock system automatically coordinates these controls, inverting the traditional approach where a single complex control manages all functions.
3Reliability
If the main blade button and main blade pull rod require simultaneous activation, then the safety is improved, but the ease of operation worsens due to the need for precise coordination
Solution Approach 1:
The safety system performs preliminary checks to verify that the push rod is properly engaged before allowing the blade control to become active. The interlock mechanism ensures that the blade control pull rod can only be pulled to the 'on' position when the self-propelled drive is properly engaged, providing safety without requiring complex simultaneous coordination.
Solution Approach 2:
The control system dynamically adjusts its state based on the position of the push rod and the main blade button. When the push rod is engaged and the main blade button is pressed, the system transitions to a state where the blade control pull rod can be activated. This dynamic state transition provides safety through conditional activation rather than requiring simultaneous precise coordination of multiple controls.
4Reliability
If the control system requires precise timing for button and pull rod activation, then the safety is improved, but the loss of time increases due to restart requirements
Solution Approach 1:
The safety interlock system performs preliminary verification of the push rod position and main blade button state before enabling blade operation. This preliminary check ensures that when the blade control pull rod is activated, the system is already in a safe state, eliminating the need for timing-critical simultaneous activation and preventing accidental shutdowns that would require restarts.
Solution Approach 2:
The control system incorporates feedback mechanisms that continuously monitor the state of the push rod, main blade button, and blade control pull rod. This feedback provides real-time confirmation to the operator that the system is in the correct state for operation, eliminating the need for precise timing and preventing accidental shutdowns by maintaining continuous verification of safe operating conditions.
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 solution ensures simplicity and safety of operation by allowing separate control actions within a specified time, preventing accidental shutdowns and reducing operator fatigue, while maintaining self-propelled functionality.
Implementation Method 1
the button return spring and the clamp return spring make the main blade button in the up state, and the main blade pull rod returns
Implementation Method 2
the elastic force of the paddle return spring causes the self-propelled start paddle to return to the initial position
Data Source
AI summary
A garden tool, including a main body, a walking wheel mounted on the main body, a self-propelled motor for driving the walking wheel, and a control panel disposed on the main body. The control panel includes a self-propelled control assembly. The self-propelled control assembly includes a self-propelled start paddle and a speed regulating button. Pressing the self-propelled start paddle activates self-propelled operation of the garden tool. The self-propelled start paddle can be released for a short time and the speed regulating button can be adjusted within the short time. The self-propelled start paddle can be re-pressed within the short time and after the speed regulating button is adjusted, and the garden tool maintains the self-propelled operation.