Vehicle Luggage Board Hinge With Single-Tool Torsion Spring Support
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Solution Overview
Problem
Existing structures for supporting the ends of coil springs in hinge mechanisms require multiple components, such as reinforcing portions and screws, which can be reduced for simplicity and efficiency.
Innovation Solution
A resin-molded body with integrated hinge portions and a torsion spring, where the torsion spring arms are supported using a single fixation tool or no fixation tool at all, reducing the number of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple components (first reinforcing portion and two screws) are used to support the coil spring, then the support structure is reliable, but the number of components increases
Solution Approach 1:
The patent merges the reinforcing portion and fixation screws into a single integrated resin-molded body. The coil spring support structure is formed directly as part of the resin-molded body through injection molding, eliminating the need for separate reinforcing portions and fixation screws while maintaining structural reliability
Solution Approach 2:
The resin-molded body performs multiple functions simultaneously: it provides structural reinforcement, serves as the mounting base for the coil spring, and integrates the fixation function that previously required separate screws. The single component accomplishes what previously required multiple separate parts
2Stability of the object's composition
If multiple fixation tools are inserted into the first plate-shaped portion to support the first arm, then the support is stable, but the device complexity increases
Solution Approach 1:
The fixation tools are merged into the resin-molded body structure itself. The first plate-shaped portion is formed with integrated features that provide stable support for the first arm without requiring separate fixation tools to be inserted, reducing component count while maintaining stability
Solution Approach 2:
The resin-molded body is self-sufficient in providing support functionality. The structure includes built-in features such as recesses, ribs, or integrated mounting points that eliminate the need for external fixation tools, allowing the component to support itself and the first arm without additional parts
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 proposed structure minimizes the number of components required for supporting the torsion spring arms, enhancing simplicity and potentially reducing manufacturing costs and assembly complexity.
Implementation Method 1
the hinge portion is formed by making the rear wall concave toward the front wall to form a hinge concave portion and welding the rear wall to the front wall
Data Source
AI summary
A structure usable as a luggage board or similar in a luggage compartment of a vehicle, including a resin-molded body and a torsion spring. The resin-molded body includes a front wall spaced apart from a rear wall and a peripheral wall connecting peripheries of the front and rear wall, as well as first and second plate-shaped portions which are rotatably coupled to each other with a hinge portion. The hinge portion is formed by concaving the rear wall toward the front wall, forming a hinge concave portion and welding the rear wall to the front wall. The torsion spring includes first and second arms and a coil therebetween. The first arm is slidably supported by the first plate-shaped portion. The second arm is supported by the second plate-shaped portion. The number of a fixation tool inserted into the first plate-shaped portion to support the first arm is one or less.