Sliding Lid Comb-Structure Prevents Article Jamming
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Solution Overview
Problem
Conventional sliding lid constructions are prone to faulty opening and closing due to articles being caught in the clearance between lid members, as they lack effective mechanisms to prevent objects placed on the lower-side lid member from entering the gap when the lid members overlap.
Innovation Solution
The sliding lid construction incorporates comb-shaped portions on both the upper-side and lower-side lid members, with alternating protrusions and depressions, and an inclined-face portion on the upper-side lid member, ensuring objects are guided onto the upper-side lid member and prevented from entering the clearance by engaging with the comb-shaped portions, thus securely preventing objects from being caught.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If flat face lid members are used in conventional sliding lid construction, then the structure is simple, but articles are easily caught in the clearance between lid members causing faulty opening and closing
Solution Approach 1:
The lid member surface is segmented into multiple protrusions and depressions (comb-shaped portions) instead of a flat face. The lower-side lid member has downward protrusions and upward depressions, while the upper-side lid member has upward protrusions and downward depressions, creating interlocking engagement that prevents article intrusion into the clearance.
Solution Approach 2:
The comb-shaped portions act as intermediary structures between the upper and lower lid members. These interlocking protrusions and depressions serve as a mechanical mediator that blocks the clearance path, preventing articles from being caught while still allowing the lid to open and close properly.
2Reliability
If comb-shaped portions with alternating protrusions and depressions are added to lid members, then articles are prevented from being caught in clearance, but the device complexity increases
Solution Approach 1:
The lid member surface is segmented into multiple protrusions and depressions (comb-shaped portions) instead of a flat face. The lower-side lid member has downward protrusions and upward depressions, while the upper-side lid member has upward protrusions and downward depressions, creating interlocking engagement that prevents article intrusion into the clearance.
Solution Approach 2:
Instead of trying to reduce the clearance between lid members or add complex blocking mechanisms, the invention inverts the approach by creating protrusions and depressions that actively engage with each other. The comb-shaped portions of the upper and lower lid members interlock in opposite patterns, using the clearance space itself as part of the engagement mechanism rather than trying to eliminate the clearance.
Data Source
AI summary
A sliding lid construction includes an upper-side lid member and lower-side lid member sliding relatively to one another, thereby changing their relative positional relationships at the open position and close position. At the open position, the upper-side lid member and lower-side lid member overlap one another in the up/down direction; at the close position, they cancel the overlap. The lower-side lid member includes a lower-side comb-shaped portion provided with protrusions and depressions on the top face in the width direction crossing the sliding direction perpendicularly, and a placement portion enabling a user to place an article thereon. The upper-side lid member includes an upper-side comb-shaped portion provided with protrusions and depressions on the bottom face in the width direction, and an inclined-face portion formed at the leading-side end in the sliding direction, and directed upward at an acute angle obliquely to the sliding direction.