Openable Door Mechanism with Intermediate Engaging Member
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Solution Overview
Problem
Conventional openable door mechanisms often result in incomplete closure due to insufficient engagement of locking members, leading to half-closed states and potential mechanical issues like amplified vibrations and damage, especially in image forming apparatuses.
Innovation Solution
The introduction of an intermediate engaging member between the first and second engaging members on the openable door, with strategically positioned engagement hooks and shafts, ensures complete closure by providing an additional locking point that engages before the primary locking members, preventing warpage-induced premature engagement and ensuring full locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only two cover fixing hooks are used to close the door, then the structure is simple, but the door may remain in a half-closed state due to insufficient engagement
Solution Approach 1:
The door closing mechanism is segmented into three distinct engaging members (first cover fixing hook, intermediate cover fixing hook, second cover fixing hook) that engage sequentially. This segmentation ensures that the door passes through multiple engagement points during closure, preventing it from stopping in a half-closed state while maintaining a relatively simple overall structure.
Solution Approach 2:
The intermediate cover fixing hook is positioned to engage with the shaft body before the first and second cover fixing hooks during the door closing process. This preliminary engagement ensures that the door is properly aligned and begins the closing sequence correctly, preventing incomplete closure and ensuring reliable engagement of all three hooks.
2Productivity
If the door closes quickly, then productivity is improved, but the engaging members may not engage properly leading to half-closed states
Solution Approach 1:
The closing process is divided into three sequential engagement stages corresponding to the intermediate, first, and second cover fixing hooks. This segmentation allows the door to close quickly while ensuring each engagement point is properly reached and engaged, as the sequential nature of the hooks provides built-in checkpoints during the rapid closing motion.
Solution Approach 2:
The intermediate cover fixing hook performs a preliminary engagement action that prepares the door for complete closure. This preliminary engagement occurs first during quick closure, ensuring the door is properly positioned before the main first and second hooks engage, thereby guaranteeing complete engagement even at high closing speeds.
3Ease of operation
If the door is allowed to warp during closing, then ease of operation is improved, but the engaging members may engage prematurely causing incomplete closure
Solution Approach 1:
The three-segment engagement system (intermediate, first, and second hooks) provides multiple checkpoints during door closure. Even if the door warps during operation, the segmented hooks ensure that all engagement points are sequentially reached and properly engaged, preventing incomplete closure while allowing natural door movement and warping during the closing process.
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 configuration ensures the openable door is less likely to be half-closed, reducing mechanical stress and operational issues, and allows users to confidently complete the locking operation by sensing the engagement of the intermediate member, thus preventing damage and enhancing operational reliability.
Implementation Method 1
a shaft that rotatably supports the openable door between an open position and a closed position, the shaft rotating around a rotation axis extending along one edge of the opening, the rotation axis being a fulcrum
Data Source
AI summary
An openable door includes a first engaging member, a second engaging member, and at least one intermediate engaging member. when the openable door pivots from an open position to a closed position, an engaging portion of the first engaging member engages a first engaged portion, and an engaging portion of an engaging portion of the second engaging member engages a second engaged portion before an engaging portion of the intermediate engaging member engages an intermediate shaft body.