Elastic Tweezers with Offset Gripping Surfaces for Short Object Handling
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Solution Overview
Problem
Conventional tweezers are inadequate for reliably gripping short objects due to weak gripping force and misalignment issues, particularly with designs featuring concavoconvex lines that weaken the gripping force for short hairs.
Innovation Solution
The tweezers feature a one-side gripping surface as a plane and an opposing surface with a reduction plane cutout, with the rear end of the opposing surface closer to the tip, allowing for a stronger grip of short objects even when bending occurs, and include projections and recesses to enhance gripping and prevent misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the gripping surface is made wide with multiple concavoconvex lines, then the gripping range is increased, but the pressing force on each line weakens and the overall gripping force becomes weak
Solution Approach 1:
The gripping surface is segmented into multiple lines, where only specific lines (first and third lines) make contact with the object. This segmentation allows the force to be concentrated on specific contact points rather than distributed across the entire wide surface, resolving the contradiction between wide gripping area and sufficient pressing force.
Solution Approach 2:
Different parts of the gripping surface have different functions: the first and third lines are designed to make contact and apply force, while the second line serves as a spacer. This local differentiation optimizes the distribution of contact points to achieve both adequate gripping area and concentrated force application.
2Area of stationary object
If the gripping surface is made small to prevent tip opening, then bending is reduced, but the gripping surfaces are likely to be misaligned and disengaged
Solution Approach 1:
The gripping surface is divided into multiple lines with specific contact points. This segmentation provides multiple potential contact points that can accommodate minor misalignments, improving reliability while maintaining sufficient gripping area.
Solution Approach 2:
The tweezers are designed with pre-determined contact line positions that anticipate potential misalignment. The first and third lines are positioned to ensure contact even when the tweezers are not perfectly aligned, preventing disengagement before gripping occurs.
3Area of stationary object
If the gripping surface is long to grip short objects, then the contact area is sufficient, but the tip opens by bending when gripping force is applied
Solution Approach 1:
The long gripping surface is segmented into multiple lines, with only the first and third lines making contact. This segmentation allows the effective contact area to be shorter and more stable, preventing tip opening while maintaining sufficient contact area for gripping short objects.
Solution Approach 2:
The contact lines are strategically positioned to optimize the balance between contact area and structural stability. The first contact line is positioned to provide sufficient contact area, while the overall line configuration maintains tip stability during gripping.
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
This design enables reliable gripping of short objects with a stronger force application where needed, preventing misalignment and breakage, and is effective for tweezers used on hair, thorns, or fishbone-like objects.
Implementation Method 1
a pair of resilient gripping sections 10, 11 on its tip side
Data Source
Figure 1
Figure 2A~2C
Figure 3A~3B
AI summary
The present invention provides tweezers (1) having elasticity and having gripping sections including a one-side gripping section (10) and the other-side gripping section (11). In the tweezers (1), a rear end of the other-side gripping surface (11a) of the other-side gripping section (11) is located closer to a tip side of the tweezers (1) than a rear end of a one-side gripping surface (10a) of the one-side gripping section (10), and a gripped object is gripped between the one-side gripping surface (10a) and the other-side gripping surface (11a).