Rotatable Wrench Head With Segmented Toothed Pillar Locking
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Solution Overview
Problem
Conventional wrenches require two hands to adjust the angle between the head and handle, making it inconvenient to use in tight spaces where the nut or bolt is located in an unreachable corner.
Innovation Solution
A wrench design featuring a toothed pillar that can be moved between engagement and disengagement positions without requiring the handle to be lifted, allowing the head to be easily rotated relative to the handle using only one hand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the handle is lifted to disengage the toothed locking portion from the toothed hole, then the head can be adjusted to different angles, but two hands are required to operate the wrench, reducing ease of operation
Solution Approach 1:
The locking mechanism is segmented into two independent toothed holes: a first toothed hole in the upper lug and a second toothed hole in the second end. The toothed pillar can selectively engage with either hole, allowing independent disengagement of the head from the handle without requiring the handle to be lifted. This segmentation enables one-handed operation while maintaining angle adjustment capability.
Solution Approach 2:
The toothed pillar acts as an intermediary element that mediates between the head and handle. By moving the toothed pillar between engagement and disengagement positions, the connection between the head and handle can be easily controlled. The pillar's ability to engage with different toothed holes provides a simple mechanical interface for angle adjustment without requiring complex handle manipulation.
2Stability of the object's composition
If the toothed locking portion is engaged with the toothed hole to fix the head and handle, then the angle is stable, but the adjustment process becomes complex requiring handle movement
Solution Approach 1:
The locking mechanism is divided into two separate toothed holes positioned at different locations. The first toothed hole provides stable engagement when the toothed pillar is in the engagement position, while the second toothed hole allows for easy disengagement. This segmented approach simplifies the adjustment mechanism by eliminating the need for complex handle movement while maintaining angle stability during operation.
Solution Approach 2:
The toothed pillar is designed to be movable between fixed positions, transitioning from an engagement position (providing stable angle fixation) to a disengagement position (enabling easy angle adjustment). This dynamic element allows the system to switch between stable operation and simple adjustment modes without increasing overall device complexity.
Data Source
AI summary
A wrench with a rotatable head comprises a handle and a head, which are connected via a first and a second ends. The first end includes an upper and a lower lugs. A first toothed hole is formed in the upper lug; a hole is formed in the lower lug. A second toothed hole is formed in the second end. The second end is inserted between the upper and lower lugs and the second toothed hole is located between the first toothed hole and the hole. A toothed pillar is movably engaged in the toothed holes. When in the engagement position, the toothed pillar is engaged with the first and second toothed holes to fix the head and the handle. When in the disengagement position, the toothed pillar is disengaged from the teeth of the first toothed hole but still engaged with the teeth of the second toothed hole, so that the head and handle are rotatable with respect to each other.