Handheld Cutter Lock-Trigger Mechanism for Safer Power-On
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Solution Overview
Problem
The existing handheld driving apparatuses for mowing or cutting objects require simultaneous operation of a lockout lever and a button to turn on power, which is complex and difficult to operate safely.
Innovation Solution
A handheld driving apparatus with a lock member that moves between two positions, allowing the trigger lever to be operated independently after the lock member is moved to the second position, simplifying the power-on process and improving operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lockout lever and button are operated simultaneously to turn on power, then safety is improved, but operability deteriorates due to complex operation
Solution Approach 1:
The safety operation mechanism is segmented into two independent components: a lock member that moves between locked and unlocked positions, and a trigger lever that operates independently. This segmentation allows each component to have a simpler, more intuitive operation while collectively providing the required safety function. The lock member handles the safety interlock function, and the trigger lever handles the power activation function, eliminating the need for simultaneous operation of multiple controls.
2Reliability
If multiple controls are required for power activation, then safety is improved, but device complexity increases
Solution Approach 1:
The control mechanism employs dynamic positioning of the lock member between locked and unlocked positions, which dynamically enables or disables trigger lever operation. This dynamic approach allows the system to provide multiple control stages (safety engagement and power activation) without requiring multiple static control components, thereby reducing overall device complexity while maintaining safety.
Data Source
AI summary
A handheld driving apparatus includes a container having a grasping member, a lock member having a protrusion, a trigger lever, and an action unit. The lock member moves between first and second positions along right and left directions. The second position is a fully pressed position. The trigger lever moves between third and fourth positions. The fourth position is a fully pressed position. The trigger lever is restricted from moving toward the fourth position by contacting the first protrusion when the lock member is in the first position. The trigger lever is free to move toward the fourth position without contacting the first protrusion when the lock member is in the second position. The action unit performs a mechanical action for mowing or cutting an object when the trigger lever is in the fourth position.