Cabin Door Auxiliary Striker Fore-and-Aft Pivot
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Solution Overview
Problem
Conventional cabin door devices require a wide space for auxiliary strikers to rotate or pivot, limiting equipment arrangement and impairing operation, especially when luggage is present, due to the wide range of angles needed for switching between held and retracted postures.
Innovation Solution
A cabin door device with a pivotable auxiliary striker that rotates 150° or less between held and retracted postures, allowing for adjustable positioning and engagement with a lock device, enabling the door to be held at an intermediate open position without the need for extensive space, using a diaphragm spring for frictional retention and a stopper to control pivoting range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the auxiliary striker is rotated or pivoted in a wide range of angles to switch between held and retracted postures, then the auxiliary striker can be reliably positioned, but a wide space must be provided which limits equipment arrangement and impairs operation
Solution Approach 1:
The patent changes the rotation axis orientation from a conventional lateral axis to a fore-and-aft axis. This parameter change in the rotation geometry allows the auxiliary striker to switch between held and retracted postures within a limited lateral space, resolving the contradiction between positioning reliability and space requirement
Solution Approach 2:
By rotating the auxiliary striker about a fore-and-aft axis rather than a lateral axis, the patent utilizes a different dimensional approach to achieve the same functional switching. This dimensional change enables compact positioning without requiring wide lateral space, thereby resolving the space constraint issue
2Ease of operation
If the auxiliary striker is rotated in a wide range of angles, then the auxiliary striker can be switched to held posture, but the arrangement of equipment in the cabin will be limited
Solution Approach 1:
Changing the rotation axis to fore-and-aft direction modifies the operational geometry, allowing the auxiliary striker to be switched between postures within a compact lateral envelope. This enables easier cabin space utilization for equipment arrangement while maintaining operational ease
3Ease of operation
If the auxiliary striker is rotated in a wide range of angles, then the auxiliary striker can be switched to held posture, but when luggage is placed in the rotation path, the position of the auxiliary striker cannot be changed
Solution Approach 1:
By changing the rotation axis orientation to fore-and-aft, the patent repositions the rotation path away from the lateral cabin space where luggage is typically placed. This allows the auxiliary striker to switch postures without being blocked by luggage, eliminating the harmful interference while preserving operational ease
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
This design allows for flexible positioning of the auxiliary striker, improving operational ease and reducing the risk of damage, while maintaining a reliable seal and comfortable air circulation within the vehicle, without the need for additional holding mechanisms.
Implementation Method 1
using a diaphragm spring for frictional retention
Data Source
AI summary
A cabin door device having a cabin frame, comprises: a door mounted to a side part of the cabin frame so as to be moveable between a fully closed position and a fully open position; and a main striker supported by the cabin frame, wherein the door has a lock device, and the door is held in the fully closed position by the lock device engaging the striker; and an auxiliary striker that is supported by the cabin frame and whose position can be changed between a held posture, in which the door is held at an intermediate position between the fully closed position and the fully open position by coupling with the lock device, and a retracted position in which the lock device of the door is allowed to engage with the striker.