Hinge-Pin Door Stop Assembly for Stable Opening Limits
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Solution Overview
Problem
Conventional door stops for hinge-mounted doors in commercial aircraft are costly, require special mounting hardware, are difficult to install and remove, and can become ineffective due to loosening or uncoupling, leading to potential damage from repeated impacts.
Innovation Solution
A door stop apparatus that is pre-installed on the door hinge, engaging with the hinge to limit door opening without contacting adjacent structures, fabricated from a single piece of lightweight material, and optionally includes a bumper to absorb impact forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional door stops are mounted on door frames or walls, then door opening can be limited, but installation requires special mounting hardware and tooling which increases installation time and cost
Solution Approach 1:
The door stop function is segmented from the door frame structure and integrated into the hinge assembly itself. The hinge includes a hinge body mounted to the door frame and a door stop component that works in conjunction with the hinge pin, separating the mounting function from the door frame and placing it directly on the hinge where it can operate without requiring separate mounting hardware.
Solution Approach 2:
The door stop function is merged with the hinge assembly by incorporating the door stop component directly into the hinge structure. The hinge body and door stop component work together as an integrated unit, with the door stop component receiving the hinge pin and limiting its rotation, thereby combining two functions into one assembly and eliminating the need for separate mounting operations.
2Reliability
If conventional door stops are secured to adjacent structures, then door collision can be prevented, but the door stops may loosen or uncouple due to continuous impact forces
Solution Approach 1:
The door stop component is merged with the hinge assembly, forming an integrated unit where the door stop component and hinge body work together. This integration ensures that the door stop function remains stable and reliable under continuous impact forces, as the entire hinge assembly is typically more securely mounted than separate door stop components.
Solution Approach 2:
The hinge pin acts as an intermediary element that connects the door to the hinge assembly and transmits impact forces in a controlled manner. The door stop component receives the hinge pin and uses it to limit rotation, allowing the force to be distributed through the hinge assembly rather than concentrated on a separate mounting structure.
3Strength
If multiple mounting hardware and tools are used for door stops, then secure mounting is achieved, but the number of parts increases making the system expensive and complex
Solution Approach 1:
The hinge body and door stop component are merged into a single integrated assembly that is mounted to the door frame as one unit. This eliminates the need for separate mounting hardware and tools for the door stop, reducing the number of parts while maintaining mounting strength through the hinge assembly's inherent structural integrity.
Solution Approach 2:
The hinge assembly serves multiple functions: it provides the rotational pivot for the door through the hinge pin, and simultaneously provides the door stop function through the door stop component. This multi-functionality eliminates the need for separate door stop mounting hardware, reducing part count and complexity while maintaining both pivot and stop functions.
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
Prevents door collisions with adjacent structures by limiting opening angles, maintaining a fixed position relative to the hinge, and reducing installation time while being durable and aesthetically appealing.
Implementation Method 1
a bumper or protective member may be coupled to the door stop apparatus for absorbing forces that may result from contact with the door
Data Source
AI summary
A door stop apparatus for limiting opening movement of a hinge mounted door is disclosed. The door stop apparatus may comprise a body member comprising a first end surface and a second end surface opposite and parallel to the first end surface. The body member may also comprise a through-opening extending between the first end surface and the second end surface, wherein the through-opening is configured to receive the hinge pin of the door hinge. Further, the body member may comprise an abutment surface extending between the first end surface and the second end surface, wherein the abutment surface is configured to abut against the door hinge for maintaining the body member in a substantially fixed position relative to the door hinge. Additionally, the body member may comprise a first side surface extending between the first end surface and the second end surface.