Locking Flex-Head Ratchet Wrench One-Handed Adjustment
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Solution Overview
Problem
Existing flex-head wrenches are not adequately suited for adjusting the angle of the head portion relative to the handle with one hand, as the locking mechanism requires two hands to operate, and the head portion may pivot unexpectedly when torque is applied, especially in those without locking mechanisms.
Innovation Solution
A locking flex-head ratchet wrench with a locking spool that can be rotated to lock or unlock the tool head, allowing for one-handed adjustment of the angle by engaging or disengaging ratcheting teeth with a spring and detent mechanism, ensuring the tool head remains in position during manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a locking mechanism is added to secure the head portion in position, then the stability of the tool head is improved, but the ease of operation deteriorates because two hands are required to operate the locking mechanism
Solution Approach 1:
The locking mechanism is designed to be operated unilaterally through a ratcheting motion system. The ratchet wheel engages with a rack to provide locking action that can be activated by single-handed manipulation of the handle, eliminating the need for bilateral operation while maintaining secure head positioning
Solution Approach 2:
The locking mechanism transitions between locked and unlocked states through dynamic ratcheting motion. The ratchet wheel can rotate in one direction to engage the rack and lock the head, while allowing reverse motion for unlocking, providing operational flexibility with single-handed input
2Ease of operation
If the head portion is allowed to pivot freely for adjustment, then the ease of operation is improved, but the stability deteriorates causing unexpected pivoting when torque is applied
Solution Approach 1:
The system provides dynamic control over head positioning through the ratcheting mechanism. The head can be freely adjusted when the ratchet is disengaged, then securely locked when engaged, allowing the user to transition between adjustment and stabilization modes as needed
Solution Approach 2:
The ratcheting mechanism provides tactile feedback to indicate when the head is locked or unlocked. The engagement and disengagement of the ratchet wheel with the rack creates audible and tactile signals that inform the user of the current state, enabling reliable operation
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
Enables one-handed adjustment of the tool head's angle without unexpected pivoting, providing secure locking and easy repositioning of the tool head relative to the handle, enhancing usability and reducing the risk of accidental movement during torque application.
Implementation Method 1
A locking spool that can be rotated to lock or unlock the tool head, allowing for one-handed adjustment of the angle by engaging or disengaging ratcheting teeth with a spring and detent mechanism
Implementation Method 2
A locking spool that can be rotated to lock or unlock the tool head, allowing for one-handed adjustment of the angle by engaging or disengaging ratcheting teeth
Implementation Method 3
A locking spool that can be rotated to lock or unlock the tool head, allowing for one-handed adjustment of the angle by engaging or disengaging ratcheting teeth with a spring and detent mechanism, ensuring the tool head remains in position during manipulation
Data Source
Figure 1~3
Figure 2
Figure 4A~4B
AI summary
A ratcheting tool (100) including a handle (130) formed with an integral yoke (132) at a first end and a tool head (110) coupled to the yoke at a pivot (120). The tool head has a toothed hub (112) facing rearwardly of the pivot and into the yoke. A locking spool (150) is rotatably carried in said yoke, said locking spool being rotatable between a first position and a second position, said locking spool including a first tooth configured to engage said toothed hub in both said first and said second positions; and wherein said tool head is fixed in a desired angular position relative to said handle when said locking spool is in said first position and said tool head is pivotable relative to said handle when said locking spool is in said second position.