Hand Tool with Heim Joint for Variable Angle Access
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Solution Overview
Problem
Conventional hand tools, such as nail clippers and surgical instruments, are difficult for elderly, arthritic individuals, and those with limited arm, wrist, and hand movement to use due to the need for extensive dexterity and alignment, while tools like wire and bolt cutters with fixed configurations struggle in confined spaces.
Innovation Solution
A hand tool design featuring a handle assembly with pivotally linked arcuate-shaped handle members and heim joints allowing for 180-degree rotational and tilting movement, enabling variable angle adjustments and easy operation with reduced manual dexterity, along with a detachable tool head for versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional nail clippers with spring handles and levers are used, then cutting function is achieved, but extensive dexterity and alignment are required making them difficult for elderly and arthritic individuals to use
Solution Approach 1:
The cutting edges are made rotatable relative to the handle assembly through a pivot mechanism, allowing the cutting head to be dynamically adjusted to different angles and orientations. This dynamic configuration enables users with limited dexterity to position the cutting edges optimally without requiring precise manual alignment, thereby improving ease of operation while maintaining cutting effectiveness
Solution Approach 2:
The device is divided into separate functional modules: a handle assembly and a detachable cutting head assembly connected by a pivot joint. This segmentation allows independent adjustment of the cutting head orientation without affecting the handle operation, reducing the alignment complexity required for effective use
2Adaptability or versatility
If surgical instruments with fixed configurations are used, then specific surgical functions are performed, but multiple different instruments are required for different functions increasing inventory complexity
Solution Approach 1:
The handle assembly is designed as a universal platform that can accept multiple different cutting head assemblies through the pivot connection mechanism. Different cutting heads (e.g., scissors, clamps, forceps) can be attached to the same handle, allowing one handle assembly to perform multiple surgical functions, thereby reducing inventory complexity while maintaining versatility
Solution Approach 2:
The pivot connection enables dynamic reconfiguration of the instrument by allowing easy detachment and reattachment of different cutting heads to the handle assembly. This dynamic adaptability allows surgical teams to use a single handle assembly for multiple procedures, reducing the need to stock multiple fixed-configuration instruments
3Ease of operation
If wire and bolt cutters with permanent fixed orientation are used, then cutting capability is provided, but cutting operations in confined spaces and recesses become more difficult
Solution Approach 1:
The cutting head assembly is connected to the handle via a pivot joint that allows rotation and angular adjustment. This dynamic positioning capability enables users to orient the cutting edges at various angles to access confined spaces and recesses, significantly improving ease of cutting in difficult-to-reach areas while maintaining full cutting capability
Solution Approach 2:
The pivot mechanism adds rotational freedom in multiple dimensions, allowing the cutting head to be positioned not only in the plane of the handle but also at various angles perpendicular to it. This multi-dimensional adjustability provides access to confined spaces that would be inaccessible to fixed-orientation cutters
Data Source
AI summary
Hand tool and method of manufacturing and using same. The hand tool includes a tool mount including at least one heim joint that removably receives thereon a tool head assembly. The heim joint and tool head assembly cooperate to provide the hand tool with a multi-directional, variable angle of attack on a work piece in a manner that accommodates aged, arthritic and otherwise handicapped people having a limited range of arm, wrist and hand movement.