Handle-Mounted Motor Control for Quick Stop and Low Finger Strain
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Solution Overview
Problem
Conventional electric motor control devices require continuous button pressing, leading to finger strain and difficulty in handling unexpected situations, as the motor decelerates when the button is released rather than stopping quickly.
Innovation Solution
A control device with a push button that protrudes from the enclosure, allowing the user to grip the handle and naturally press the button, combined with a lever-type steering control and emergency stop button, enabling easy operation and quick stopping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional electric motor uses a continuous button pressing method to control motor operation, then the motor can be controlled to start and stop, but the user experiences finger strain and cannot respond quickly to unexpected situations
Solution Approach 1:
The control device transitions from a static continuous-press requirement to a dynamic system where the motor continues operating after a single button press. The motor only stops when the button is pressed again, creating a dynamic state change system that reduces continuous user input while maintaining control reliability.
Solution Approach 2:
The control mechanism uses periodic action by requiring only intermittent button presses rather than continuous pressing. The motor operates during periods when the button is not pressed and stops only when pressed, converting a continuous action requirement into periodic discrete actions that reduce finger strain while maintaining operational control.
2Reliability
If the electric motor decelerates when the driving button is released, then the motor stops in normal operation, but the user cannot cope with unexpected situations requiring quick stopping
Solution Approach 1:
The control device prepares for emergency stopping by having the stop function pre-configured and accessible through the same button mechanism. When an emergency situation arises, the user can immediately press the button to trigger instant stopping, eliminating the need for gradual deceleration and enabling rapid response to unexpected situations.
3Ease of operation
If the user applies physical force to the handle for steering, then direction control is achieved, but the user requires a lot of physical strength which causes finger pain
Solution Approach 1:
The control device replaces the mechanical steering system that requires physical force on the handle with an electronic control system. Direction control is achieved through electronic signals from control buttons rather than mechanical force application, substituting a high-force mechanical system with a low-force electronic control system that eliminates finger pain while maintaining steering functionality.
Data Source
AI summary
A control device for an electric motor that outputs a control command for changing a direction of the electric motor provided with a handle, and starting, stopping, and decelerating the electric motor includes an enclosure that has a curved outer surface on a lower side and is attachable to and detachable from an outer surface of the handle, and a driving signal output unit that protrudes from a side portion of the enclosure and outputs at least one of starting and speed control commands of the electric motor.