Flash Motor Regenerative Braking for Angle Stability
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Solution Overview
Problem
Conventional lighting devices for auto-bounce flash photography face challenges in maintaining the angle of the light-emitting part due to external forces, leading to unpredictable illumination and poor photography results, as existing clutch mechanisms require strong holding power or additional components that increase size and cost.
Innovation Solution
A lighting device with a control unit that applies an intermittently repeated regenerative brake to the motor during stop periods, providing stronger holding power when the motor is not in use and reducing power during operation, allowing for stable attitude maintenance and smooth manual angle adjustments without additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the holding power of the clutch mechanism is raised to an extreme level to secure the light-emitting part angle, then the holding power is improved, but the driving mechanism requires larger motor power and increased size
Solution Approach 1:
The patent applies a clutch mechanism with adjustable holding power that can dynamically change its engagement level. During auto-bounce operation, the clutch provides strong holding power to maintain the light-emitting part angle. During manual operation, the clutch can be released or weakened to allow smooth rotation. This dynamic adjustment eliminates the need for an extremely powerful motor, as the clutch adapts its holding force to operational requirements.
Solution Approach 2:
The clutch mechanism's holding power parameter is changed based on operational mode. The control unit adjusts the clutch engagement level - high engagement during auto-bounce for stability, low or zero engagement during manual operation for smoothness. This parameter change allows the system to achieve strong holding power when needed without requiring continuously high motor power.
2Strength
If a click mechanism or locking mechanism is added to secure the light-emitting part angle, then the holding power is improved, but the device complexity and size increase
Solution Approach 1:
The patent extracts the angle securing function from complex mechanical locking mechanisms and implements it through the clutch mechanism's controllable engagement. By using the clutch's adjustable holding power, the system achieves angle security without requiring additional click mechanisms or locking mechanisms, thereby reducing device complexity while maintaining the holding power function.
Solution Approach 2:
The clutch mechanism serves multiple functions: it provides holding power during auto-bounce operation, allows smooth manual rotation when released, and eliminates the need for separate locking mechanisms. This multi-functionality reduces overall device complexity by consolidating multiple mechanisms into a single versatile component.
3Stability of the object's composition
If the clutch mechanism holds the light-emitting part at a predetermined angle during auto-bounce operation, then the angle stability is improved, but external forces can still change the angle to unpredictable directions
Solution Approach 1:
The control unit continuously monitors the operational state and adjusts the clutch engagement accordingly. During auto-bounce operation, the clutch maintains strong engagement to hold the light-emitting part at the calculated bounce angle. The system's reliability is enhanced because the control unit actively manages the clutch state based on feedback from the operational mode, preventing unpredictable angle changes while maintaining stability.
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
This configuration ensures stable and reliable light emission with proper holding power, enabling smooth manual operation and quick bounce photography while minimizing the need for additional components or increased motor power, thus addressing the issues of unpredictable angle changes and cost.
Implementation Method 1
the bounce part being driven in one of a horizontal direction and a vertical direction by energizing a motor
Implementation Method 2
the control unit applies an intermittently repeated regenerative brake to the motor in a stop period during which the light-emitting part is not driven by an operation of the motor
Data Source
AI summary
An object of the present invention is to provide a lighting device capable of properly performing a bounce motion and photography in the event of an unexpected motion. The lighting device of the present invention is a lighting device including a control unit that provides an instruction of an auto-bounce motion. When detecting an auto-bounce motion in S303, the control unit releases the brake of a motor for driving a light-emitting part and performs auto-bounce control in S304. When detecting that the bounce angle of the light-emitting part in the auto-bounce motion reaches a target position and the motor enters a stop period in S303, the control unit automatically switches to the application of an intermittently repeated regenerative brake to the motor. This can suppress a movement of the light-emitting part even in an accidental motion and perform a proper bounce motion with an easy manual operation.