Finger-Safe Door Hinge With Deformable Edge Shield
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Solution Overview
Problem
Residential doors pose a significant risk of severe injury to fingers, particularly in young children, due to the clamping force generated at the hinge edge, and existing finger-blocking devices and deformable materials have not achieved market success due to aesthetic concerns and lack of compatible hinge designs.
Innovation Solution
A finger-safe door-hinge combination using soft, deformable materials on the hinge-side edge in conjunction with specialized hinges that provide structural support, mimicking conventional door appearance and functionality, with a shield inhibiting access to the clamping region and deformable channels to prevent crushing injuries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If blocking panels are used to prevent clamping injury, then finger safety is improved, but aesthetic appearance deteriorates
Solution Approach 1:
The patent applies deformable material as a thin flexible layer on the door edge that can yield to fingers under compression while maintaining the door's conventional appearance. This resolves the contradiction by providing injury prevention through material deformation rather than through visible blocking structures.
Solution Approach 2:
The patent changes the physical parameter of the door edge material from rigid to deformable, allowing it to compress under finger pressure. This parameter change enables the door to provide both aesthetic appearance (when closed) and safety (when deformed under pressure).
2Object-affected harmful factors
If deformable materials are used on the door edge, then finger safety is improved, but compatible hinge design becomes unavailable
Solution Approach 1:
The patent applies deformable material locally only at the door edge where fingers are most likely to be pinched, while the rest of the door and hinge assembly can maintain conventional rigid construction. This allows compatibility with existing hinge designs while providing safety where needed.
Solution Approach 2:
The patent segments the door structure by separating the deformable edge material from the main rigid door body and hinge assembly. This segmentation allows the deformable material to function independently for safety while the hinge assembly maintains its conventional design and functionality.
3Object-affected harmful factors
If deformable materials are used, then finger safety is improved, but structural support capability deteriorates
Solution Approach 1:
The patent uses a composite structure combining deformable material with rigid support elements. The deformable material provides finger safety by yielding to pressure, while the rigid support structure (including the hinge assembly) provides the necessary structural support for the door.
Solution Approach 2:
The patent incorporates rigid support structures and hinge assemblies that are pre-configured to provide structural support before the door is installed. This preliminary structural framework ensures that the deformable material added for safety does not compromise the overall structural integrity of the door system.
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 effectively prevents clamping injuries by yielding to fingers while maintaining the appearance and functionality of a conventional door, ensuring structural support and safety without the need for complex installation or additional aesthetic modifications.
Implementation Method 1
Deformable materials prevent injury by yielding to hands and fingers without crushing them
Implementation Method 2
soft, deformable materials on the hinge-side edge
Data Source
AI summary
A finger-safe door-hinge combination looks and feels like a conventional residential door. Finger protection is achieved through the use of soft, deformable materials on the hinge-side edge in combination with specialized hinges. The deformable materials are shaped to give the appearance of a traditional door yet provide clamping injury protection by yielding to fingers. The specialized hinges provide structural support across the deformable materials in a finger-safe manner such that hinge leaves do not cause clamping injury.