Power-Driven Working Device with Cruise Control Output Adjustment
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Solution Overview
Problem
Conventional blowers require complex operations to adjust output power during cruise control, necessitating discontinuation of cruise control to change airflow settings.
Innovation Solution
A power-driven working device with a control unit that includes a cruise control unit and an output power adjustment unit, allowing for constant output power maintenance and easy adjustment via first and second switches during cruise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cruise control is used to maintain constant output power, then the output power remains stable, but adjusting the output power requires discontinuing cruise control and performing complex operations
Solution Approach 1:
The operating unit is segmented into multiple independent switches (first switch, second switch, and cruise switch) that can be operated independently. This allows the cruise control function and output power adjustment function to coexist without interference, enabling power adjustment during cruise control without discontinuing the cruise mode.
Solution Approach 2:
The control unit dynamically responds to different switch combinations: when the cruise switch is activated with the first or second switch, it adjusts output power while maintaining cruise control; when only the cruise switch is activated, it maintains constant power. This dynamic response enables flexible power adjustment during cruise control operation.
2Adaptability or versatility
If the trigger lever is used to adjust wind speed, then the output power can be changed, but during cruise control the operation becomes complicated requiring trigger lever repositioning and re-activation
Solution Approach 1:
The output power adjustment function is extracted from the trigger lever operation and implemented through dedicated first and second switches. This separation allows power adjustment to occur independently of the trigger lever position, eliminating the need to discontinue cruise control for power adjustment.
Solution Approach 2:
The cruise switch serves multiple functions: it activates cruise control mode, and when combined with the first or second switch, it enables power adjustment while maintaining cruise control. This multi-functionality reduces operational steps and simplifies the user interface.
3Ease of operation
If cruise control is discontinued to adjust output power, then the power can be changed, but the cruise control state is lost and must be re-established
Solution Approach 1:
The cruise control action continues uninterrupted during power adjustment. When the first or second switch is activated during cruise control, the control unit adjusts power while maintaining the cruise control state, eliminating the need to re-establish cruise control after adjustment.
Data Source
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AI summary
A power-driven working device including: a working tool; a drive unit configured to drive the working tool; a control unit configured to control an output power of the drive unit; and an operating unit including a first switch and a second switch, is provided. The control unit includes a cruise control unit configured to execute cruise control to maintain the output power of the drive unit constant when a cruise switch is activated, and an output power adjustment unit configured to increase the output power of the drive unit and to continue the cruise control when the first switch is activated during the cruise control, and to decrease the output power of the drive unit and to continue the cruise control when the second switch is activated during the cruise control.