Opening-Closing Tool Biasing Body Recess Latching
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Solution Overview
Problem
Existing nippers with open-biasing functions face issues such as excessive opening leading to attachment failures or biasing body breakage, and previous solutions either allow excessive opening or increase production costs with the addition of stoppers.
Innovation Solution
An opening-closing tool with a biasing body that includes a recess on one half-body for latching and an unlatching mechanism on the other, preventing excessive opening and ensuring the biasing body separates from the recess when a predetermined force is applied, thus maintaining a safe closed state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a biasing body is provided between two half-bodies to urge handle parts open, then opening and closing operation is prompt and convenient, but the handle parts cannot be opened more than necessary and may cause attachment failure or biasing body breakage
Solution Approach 1:
A stopper member is introduced as an intermediary element between the biasing body and the second half-body. This stopper member includes a stopper that abuts the biasing body to limit its expansion, preventing excessive opening of the handle parts while maintaining the open-biasing function. The stopper member acts as a mediator that controls the interaction between the biasing body and the half-bodies, preventing direct contact that would cause breakage.
Solution Approach 2:
The invention changes the physical state and positioning parameters of the biasing body by introducing the stopper member. The stopper member controls the expansion distance and position of the biasing body, transforming it from an uncontrolled elastic element to a regulated component with defined movement limits. This parameter control prevents the biasing body from undergoing excessive deformation that would lead to breakage.
2Reliability
If a stopper is added to prevent excessive opening of handle parts, then reliability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The stopper member is designed as a segmented structure with distinct functional portions: a stopper portion that contacts the biasing body, a bridge portion that connects to the first half-body, and positioning features. This segmentation allows each portion to be optimized for its specific function while maintaining overall simplicity. The modular nature of the stopper member facilitates easy manufacturing and assembly.
Solution Approach 2:
The stopper member serves multiple functions simultaneously: it limits the expansion of the biasing body, prevents excessive opening of the handle parts, and maintains the structural integrity of the assembly. By combining these functions into a single component, the invention avoids the need for multiple separate parts, thereby reducing manufacturing complexity while achieving reliable protection against excessive opening.
3Ease of operation
If the biasing body is allowed to expand freely, then ease of operation is maintained, but the biasing body may elongate and break
Solution Approach 1:
The stopper member provides beforehand cushioning by positioning the biasing body at a predetermined distance from the second half-body before any excessive force is applied. The stopper abuts the biasing body in advance, creating a mechanical limit that prevents the biasing body from expanding beyond its safe elastic range. This prior cushioning prevents the conditions that would lead to elongation and breakage.
Solution Approach 2:
The stopper member exerts preliminary anti-action by opposing any excessive expansion of the biasing body before it can cause damage. When the handle parts attempt to open beyond the predetermined position, the stopper abuts the biasing body, creating a counter-force that prevents further expansion. This preliminary anti-action protects the biasing body from reaching the critical point of elongation and breakage.
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 tool allows for efficient and safe operation by preventing excessive opening and reducing the risk of biasing body breakage, ensuring reliable and cost-effective production.
Implementation Method 1
a biasing body 3 that abuts the second half-body 2 and provides an open bias on the two handle parts 1b, 2b
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An object of the present invention is to provide an innovative opening-closing tool with extremely high product value. A first half-body 1 having a first operating part 1a on the distal end and a first handle part 1b on the proximal end and a second half-body 2 having a second operating part 2a on the distal end and a second handle part 2b on the proximal end have a cross-over pivot, and a biasing body 3 that abuts the second half-body 2 and provides an open bias on the two handle parts 1b, 2b is provided on the first half-body 1.