Adjustable Handle Mechanism for Hand-Propelled Power Tools
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Solution Overview
Problem
Hand-propelled power tools require adjustable handle angles to accommodate different working conditions and operators, but existing solutions are not sufficiently easy or convenient to adjust, impacting working efficiency.
Innovation Solution
A handle device with a rod body and an adjustment assembly that can switch between locked and unlocked states, allowing the handle to rotate relative to the main body when unlocked and fix in place when locked, using a sliding or rotating mechanism with an operating piece to facilitate easy adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the handle device is made fixed and simple, then the device complexity is reduced, but the adaptability to different working conditions and operators deteriorates
Solution Approach 1:
The handle device transitions from a fixed structure to a dynamic adjustable structure. The adjustment assembly allows the handle to rotate between a locked state (fixed angle) and an unlocked state (adjustable angle), enabling the device to adapt to different working conditions and operator preferences while maintaining structural simplicity when locked.
2Adaptability or versatility
If the handle angle is made adjustable, then the adaptability to different working conditions improves, but the ease of operation deteriorates due to complex adjustment mechanisms
Solution Approach 1:
The adjustment assembly is designed to be self-operating through a simple manual mechanism. The operating piece can be easily manipulated by hand to switch between locked and unlocked states without requiring additional tools or complex procedures, making the adjustment process as convenient as basic hand operations.
3Ease of operation
If a simple locking mechanism is used, then the ease of operation improves, but the reliability of the locked state deteriorates
Solution Approach 1:
The locking function is segmented into distinct components: the adjustment assembly for angle modification and the locking mechanism for position fixation. This separation allows the locking mechanism to focus specifically on providing reliable fixation at selected angles, while the adjustment assembly handles the complexity of angle selection, achieving both ease of operation and locking reliability.
Data Source
AI summary
A hand-propelled power tool includes a main body and a handle device connected to the main body. The handle device includes a rod body connected to the main body extending along a first straight line and an adjustment assembly connected to the rod body comprising an operating piece capable of sliding along the first straight line relative to the rod body. The adjustment assembly has a locked state and an unlocked state, the operating piece is operative to slide along the rod body to switch the adjustment assembly between the locked state and the unlocked state, when the adjustment assembly is in the unlocked state, the handle device is operative to rotate relative to the main body, and, when the adjustment assembly is in the locked state, the handle device is fixedly connected to the main body.