Protective Doorknob Shell for Wall-Impact Damage Prevention
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Solution Overview
Problem
Existing doorknobs that contact walls near corners cause damage due to the lack of effective barriers, and doorstops configured over doorknobs risk detachment.
Innovation Solution
A doorknob design featuring a protective portion that is tangentially and axially secured over a knob portion, using flexible materials to absorb impact and prevent damage, with a lock actuator accessible through the protective portion for functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a doorstop is configured over the doorknob to prevent contact with the wall, then damage to the wall and doorknob is prevented, but the doorstop may become detached from the doorknob during rotation
Solution Approach 1:
The doorstop is made from a flexible material that can elastically deform during rotation. This flexible shell approach allows the doorstop to accommodate the rotational motion of the doorknob while maintaining continuous contact and attachment, preventing both wall damage and detachment simultaneously.
Solution Approach 2:
The doorstop is designed to be movable relative to the doorknob during rotation rather than rigidly fixed. This dynamic configuration allows the doorstop to rotate with the doorknob while maintaining attachment through flexible material deformation, resolving the contradiction between preventing damage and maintaining reliability.
2Object-affected harmful factors
If the doorknob is made with a protective portion to prevent wall contact, then damage prevention is improved, but the device complexity increases
Solution Approach 1:
The protective doorstop is integrated directly into the doorknob structure rather than being a separate component. This merging of the protective function with the doorknob itself eliminates the need for additional attachment mechanisms, reducing overall device complexity while maintaining damage prevention capabilities.
Solution Approach 2:
The protective portion is implemented as a flexible material layer that can be directly formed as part of the doorknob structure. This approach provides protection without requiring complex mechanical attachment systems, as the flexible material naturally conforms to the doorknob's rotational motion.
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 protective portion effectively prevents damage to the doorknob and adjacent objects by absorbing impact, while maintaining operational functionality and ease of use.
Implementation Method 1
The protective portion may be made of a flexible material, meaning that the protective portion may be made of a material with a Young's modulus in the range of 0.1 MPa to 10 MPa, inclusive of said values. The flexible material of the protective portion may allow the protective portion to absorb the force of contacting another object
Data Source
AI summary
Embodiments of the present invention comprise a doorknob with a knob portion and a protective portion. A plurality of knob extrusions may extend outwards from a knob outer surface. A plurality of protective portion indentations may extend from a protective portion inner surface towards a protective portion outer surface. The protective portion may be removably or permanently configured over the knob portion whereby the plurality of knob extrusions are configured within the plurality of protective portion indentations to secure the protective portion to the knob portion. The knob extrusions may extend a distance parallel to a knob center axis. Said distance may be less than a corresponding knob length. The knob extrusions may be configured within the protective portion indentations whereby the protective portion is secured to the knob both tangentially and axially.