Plastic Ring Binder Mechanism With Film Hinge
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Solution Overview
Problem
Existing ring binder mechanisms for filing perforated documents are heavy due to metal materials and require complex manufacturing with multiple components, increasing production costs and safety risks.
Innovation Solution
A ring binder mechanism designed with a single ring-forming element, multiple pivoting bars, and a rigid carrier, where pivoting strips are connected via a hinge to achieve toggle-lever movement, reducing the number of parts and using plastic materials for lightweight, cost-effective production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal materials are used for ring binder mechanism, then strength and durability are improved, but weight increases and safety risks increase
Solution Approach 1:
The patent changes the material parameter from metal to plastic, fundamentally altering the weight and safety characteristics while maintaining structural functionality. This material substitution resolves the contradiction by providing a lightweight, safe alternative that still achieves sufficient strength for the binder mechanism.
2Reliability
If multiple components are used in ring binder mechanism, then functionality and reliability are improved, but manufacturing complexity and production costs increase
Solution Approach 1:
The patent merges multiple separate components (ring elements, pivoting strips, carrier) into a single integrally molded plastic piece. This consolidation eliminates assembly steps, reduces manufacturing complexity, and lowers production costs while maintaining the functional reliability of the binder mechanism through monolithic construction.
3Reliability
If nickel is used in ring binder mechanism, then corrosion resistance is improved, but environmental harm and health risks increase
Solution Approach 1:
The patent eliminates nickel entirely by using plastic material, converting the harmful factor (nickel corrosion resistance) into a beneficial outcome (nickel-free environmentally safe construction). The plastic material inherently provides corrosion resistance without the environmental and health hazards associated with nickel.
4Stability of the object's composition
If rigid carrier with moving parts is used, then structural stability is improved, but manufacturing effort and assembly complexity increase
Solution Approach 1:
The patent combines the rigid carrier and all moving parts into a single integrally molded plastic component. The pivot axes, pivoting strips, and carrier are formed as one piece through injection molding, eliminating separate manufacturing and assembly steps while maintaining the structural stability and mechanical functionality of the binder mechanism.
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 solution significantly reduces manufacturing effort and weight, enhances safety by using plastic, and eliminates the need for environmentally harmful nickel, while maintaining long-term stability and flexibility.
Implementation Method 1
the pivoting strips are connected via a hinge (9), in particular a film hinge, in each case along mutually facing longitudinal edges (10)
Implementation Method 2
The swivel strips (2, 2') are designed to be relatively thin, so that they are designed to be bendable about a longitudinal axis (S) of the same
Data Source
AI summary
The mechanism has ring elements (14, 14') connected with two pivoting strips (2, 2'), respectively, where the mechanism is formed as a plastic-injection mold part. The pivoting strips are jointly connected with a carrier (1) and interconnected by a hinge (9) such that the pivoting strips are switched between the operating positions by bending one of the pivoting strips and/or the hinge. Rings (3, 3') are present in opening and closing positions in the two operating positions of the pivoting strips, respectively. The hinge is formed as a film hinge.