Modular grasping tongs
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Solution Overview
Problem
Existing tongs are specialized for specific tasks and lack flexibility, making them unsuitable for different use cases, and they require consistent hand strength, which can be a challenge for individuals with decreased hand strength or physical disabilities.
Innovation Solution
A modular pair of tongs with a hinge and spring mechanism that allows for interchangeable grasping surfaces and a locking system to maintain grip without constant pressure, enabling use with various objects and reducing the need for consistent hand strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tongs are specialized for a particular purpose, then they perform that specific task well, but they cannot be used for other tasks
Solution Approach 1:
The tong is divided into modular components: a handle assembly and interchangeable tip assemblies. Each tip assembly can be detached and replaced with another, allowing the same handle to perform multiple different tasks. This segmentation enables the tong to transition from a single-purpose tool to a multi-purpose tool while maintaining reliable performance in each specific task.
Solution Approach 2:
The handle assembly is designed as a universal component that can accommodate various tip assemblies through a standardized connection interface. This universality allows one handle to serve multiple functions by simply changing the tip, resolving the contradiction between specialized performance and versatility.
2Reliability
If the user supplies continuous pressure to maintain grip, then the tong grasps objects securely, but elderly or differently-abled users may drop or crush items due to erratic hand strength
Solution Approach 1:
The spring mechanism automatically adjusts to maintain grasping force without requiring continuous user input. When an object is placed in the tongs, the spring biases the arms to close on the object and maintain contact pressure. This self-adjusting mechanism compensates for variations in user hand strength, allowing secure grasping without constant pressure application.
Solution Approach 2:
The grasping mechanism transitions from a static, pressure-dependent system to a dynamic, spring-driven system. The spring provides continuous force that automatically adapts to the grasping task, reducing the need for steady manual pressure while maintaining reliable object contact.
3Productivity
If the spring biasing force is strong, then the tong closes automatically on objects, but the force required to open the tong becomes excessive
Solution Approach 1:
The spring is designed to provide just enough biasing force to ensure reliable closing on typical objects, rather than excessive force that would make opening difficult. This partial action approach balances automatic closing capability with reasonable opening effort, optimizing the trade-off between grasping speed and operability.
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
The modular design allows for versatile use with different objects and reduces the risk of dropping items by maintaining a secure grip without requiring constant hand strength, making it more accessible for individuals with physical limitations.
Implementation Method 1
the hinge having a spring or other force applying mechanism biasing the hinge towards a maximum angle of extension
Data Source
AI summary
A hand-held, modular pair of tongs for grasping and manipulating items or substances is disclosed. The tongs include a first arm and a second arm connected by a hinge, the hinge being biased towards a maximum angle of extension, and the first arm and second arm each terminating in two or more grasping fingers, each grasping finger being biased outward. A grasping finger lock on each arm, when retracted, permits the two or more grasping fingers of its arm to rest outward to release any tip being grasped, and, when extended, forces the two or more grasping fingers of its arm inward to enclose a tip between them. A hinge lock, when retracted while the pair of tongs is closed prevents their opening. A tightening bolt, when rotated, reduces a force necessary to prevent the hinge fully opening, or locks the hinge in a partially open position.